Fan Module for Neck-Mounted Fans, Portable Fan Based on High-Speed Three-Phase Motors, and Neck-Mounted Fan

TECHNICAL FIELD

[0005]The present application relates to the technical field of fan, and in particular to fan module for neck-mounted fans, portable fan based on high-speed three-phase motors, and neck-mounted fan.

BACKGROUND

[0006]With its advantages of being small, lightweight and easy to carry, the portable fan has gradually become an essential small electrical appliance for people on the go and in their daily lives. It not only provides users with a convenient way to cool down, but also brings great comfort in the hot summer, becoming an ideal choice for many people to travel and home. However, the portable fan in the prior art has a relatively slow motor speed, limited air speed and air volume, and high vibration and noise, resulting in the user not being able to obtain the best comfort experience under different environments and demands.

SUMMARY

[0007]In order to solve the above technical problem, the present application provide a fan module for neck-mounted fans, portable fan based on high-speed three-phase motors, and neck-mounted fan.

[0008]Compared to the prior art, fan module for neck-mounted fans, portable fan based on high-speed three-phase motors, and neck-mounted fan of the present application have the following advantages:

[0009]1. The multiplexed connection between the fan assembly and the assembly base not only increases the stability of the connection between the fan assembly and the assembly base, but at the same time, this composite connection can greatly reduce the space occupied by the fan assembly in the fan housing, so that the volume of the fan module can be further reduced.

[0010]2. The provision of a silencing device reduces the noise generated by the fan motor of the neck fan, specifically the noise associated with the operation of the fan motor in the ventilation channel can be controlled to less than 75 db, more preferably the noise level is less than 65 db.

BRIEF DESCRIPTION OF DRAWINGS

[0011]In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings to be used in the description of the embodiments or prior art will be briefly introduced below, and it will be obvious that the accompanying drawings in the following description are only some of the embodiments of the present application, and that for a person of ordinary skill in the field, other accompanying drawings can be obtained according to these drawings without paying for the inventive labour.

[0012]FIG. 1a is a schematic structural diagram of the overall structure of a fan module of the first embodiment of the present application.

[0013]FIG. 1b is a schematic structural diagram of a flexible housing of the first embodiment of the present application.

[0014]FIG. 1c is a schematic structural diagram of a wind guide cover of the first embodiment of the present application.

[0015]FIG. 1d is a schematic structural diagram of the fan module split of the first embodiment of the present application.

[0016]FIG. 1e is a sectional view of the fan module of the first embodiment of the present application.

[0017]FIG. 1f is a schematic structural diagram of an air duct of the first embodiment of the present application.

[0018]FIG. 1g is a sectional view of a bracket connected to a fan assembly of the first embodiment of the present application.

[0019]FIG. 2a is a schematic diagram of the overall structure of a fan module of the second embodiment of the present application.

[0020]FIG. 2b is a schematic diagram of the disassembled structure of the fan module of the second embodiment of the present application.

[0021]FIG. 2c is a sectional view of the fan module of the second embodiment of the present application.

[0022]FIG. 2d is a schematic structural diagram of a first view of a fan housing of the second embodiment of the present application.

[0023]FIG. 2e is a schematic structural diagram of a second view of a fan housing of the second embodiment of the present application.

[0024]FIG. 2f is a schematic structure of a motor shell of the second embodiment of the present application.

[0025]FIG. 2g is a schematic structural diagram of a first view of the fan blades of the second embodiment of the present application.

[0026]FIG. 2h is a schematic structural diagram of a second view of the fan blades of the second embodiment of the present application.

[0027]FIG. 2i is a schematic structural diagram of a first view of an assembly base of the second embodiment of the present application.

[0028]FIG. 2j is a schematic structural diagram of a second view of an assembly base of the second embodiment of the present application.

[0029]FIG. 3a is a schematic diagram of the overall structure of a fan module of the third embodiment of the present application.

[0030]FIG. 3b is a schematic diagram of the disassembled structure of the fan module of the third embodiment of the present application.

[0031]FIG. 3c is a schematic structural diagram of a first view of a fan housing of the third embodiment of the present application.

[0032]FIG. 3d is a schematic structural diagram of a second view of a fan housing of the third embodiment of the present application.

[0033]FIG. 3e is a schematic structural diagram of a first view of the fan blades of the third embodiment of the present application.

[0034]FIG. 3f is a schematic structural diagram of a second view of the fan blades of the third embodiment of the present application.

[0035]FIG. 4a is a schematic diagram of the overall structure of a fan module of the fourth embodiment of the present application.

[0036]FIG. 4b is a schematic diagram of the disassembled structure of the fan module of the fourth embodiment of the present application.

[0037]FIG. 4c is a schematic structural diagram of a top view perspective of a fan housing of the fourth embodiment of the present application.

[0038]FIG. 4d is a schematic structural diagram of a elevation view perspective of a fan housing of the fourth embodiment of the present application.

[0039]FIG. 4e is a sectional view of the fan module of the fourth embodiment of the present application.

[0040]FIG. 5a is a schematic diagram of a structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0041]FIG. 5b is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0042]FIG. 5c is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0043]FIG. 5d is a circuit diagram of a touch-slide regulation chip in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0044]FIG. 5e is a circuit diagram of a touch screen connection holder in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0045]FIG. 5f is a schematic diagram of a display interface of a control device in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0046]FIG. 5g is a circuit diagram of a single-contact touch screen chip in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0047]FIG. 5h is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0048]FIG. 5i is a schematic diagram of a structure of a voice module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0049]FIG. 5j is a circuit diagram of a voice acquisition module in a voice module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0050]FIG. 5k is a circuit diagram of a voice recognition module in a voice module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0051]FIG. 5l is a schematic diagram of a structure of a voice output module in a voice module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0052]FIG. 5m is a circuit diagram of a voice output module in a voice module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0053]FIG. 5n is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0054]FIG. 5o is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0055]FIG. 5p is a schematic diagram of a structure of a drive module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0056]FIG. 5q is a schematic diagram of a structure of a motor in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0057]FIG. 5r is a circuit diagram of a drive module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0058]FIG. 5s is another circuit diagram of a drive module in a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0059]FIG. 5t is another schematic structure of a portable fan based on a high-speed three-phase motor provided in the sixth embodiment of the present application.

[0060]FIG. 6a is a flowchart of a method of controlling a portable fan provided in the seventh embodiment of the present application.

[0061]FIG. 7a1 is a three-dimensional schematic diagram of a neck fan provided in the eighth embodiment of the present application.

[0062]FIG. 7a2 is one of the schematic diagrams as well as and a partially enlarged view of the mid-corresponding silencing device of the neck fan in some embodiments of the eighth embodiment of the present application.

[0063]FIG. 7b is a partially exploded schematic of the neck fan shown in FIG. 7a1.

[0064]FIG. 7c is one of the schematic diagrams of the direction of the inlet and outlet airflow of the neck fan in some embodiments of the eighth embodiment of the present application.

[0065]FIG. 7d is a schematic bis of the direction of the inlet and outlet airflow of the neck fan in some embodiments of the eighth embodiment of the present application.

[0066]FIG. 7e is a schematic diagram of the structural relationship between the central axis of rotation of the fan of the neck fan and the direction of the airflow out of the fan in some embodiments of the eighth embodiment of the present application.

[0067]FIG. 7f is a schematic diagram of a section of a neck fan shown in some embodiments of the eighth embodiment of the present application and a schematic diagram of the direction of wind flow in the sectioned schematic state.

[0068]FIG. 7g is a left view of the neck fan shown in FIG. 7f and a schematic illustration of the simulation of its internal air flow direction.

[0069]FIG. 7h is a schematic diagram of a section of the neck fan shown in FIG. 7f along the direction A-A.

[0070]FIG. 7i is a schematic diagram of a section of the neck fan shown in FIG. 7f along the direction B-B.

[0071]FIG. 7j is a schematic diagram of a section of the neck fan shown in FIG. 7f.

[0072]FIG. 7k is an enlarged schematic view at E shown in FIG. 7j.

[0073]FIG. 7l is a schematic diagram of an air inlet state and an air outlet state of a neck fan provided with a third air outlet.

[0074]FIG. 7m is a schematic view of an air guide plate provided within the first air duct of the neck fan shown in FIG. 7f.

[0075]FIG. 7n is a schematic diagram of an exploded state structure of an extended section of the first air duct shown in FIG. 7m.

[0076]FIG. 7o is a schematic diagram of a neck fan of some other embodiments of the eighth embodiment of the present application.

[0077]FIG. 7p is a schematic diagram of the structure associated with the first air duct of the neck fan shown in FIG. 7o.

[0078]FIG. 7q1 is a schematic diagram of the three-dimensional structure of the fan motor of the neck fan in some specific embodiments of the eighth embodiment of the present application.

[0079]FIG. 7q2 is a three-dimensional schematic view of another angle of the motor casing of the fan motor in the eighth embodiment of the present application.

[0080]FIG. 7r1 is a schematic diagram of the axially disassembled structure of the fan motor shown in FIG. 7q1.

[0081]FIG. 7r2 is a schematic diagram of the fan motor structure in a cutaway state.

[0082]FIG. 7s is a schematic view of the structure of the impeller shown in FIG. 7r1 in upward view.

[0083]FIG. 7t is a schematic view of the structure of the impeller shown in FIG. 7r1 in overhead view.

[0084]FIG. 7u is a schematic view of the structure of the impeller shown in FIG. 7r1 in front view.

[0085]FIG. 7v is a schematic view of the structure of another angle of the impeller shown in FIG. 7u;

[0086]FIG. 7w is an enlarged schematic view of the neck fan at D in FIG. 7f to show the silencing device in the neck fan and its mounting position

[0087]FIG. 7x is a schematic diagram of the axial exploded state structure of the support member and silencing member in the silencing device shown in FIG. 7w.

[0088]FIG. 7y is a schematic diagram of the structure of the support member and the first air inlet cover in the silencing device shown in FIG. 7w.

[0089]FIG. 7z is a schematic diagram of a functional module of a control circuit in a neck fan provided by an alternative embodiment shown in the eighth embodiment of the present application.

DETAILED DESCRIPTION

[0090]In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is described in further detail hereinafter in conjunction with the accompanying drawings and embodiment examples. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present application and are not intended to limit the present application.

[0091]It should be noted that when a component is referred to be “being fixed to” or “set on” the other component, it may be directly on the other component or indirectly on the other component. When a component is said to be “coupled” to the other element, it may be directly coupled to the other element or indirectly coupled to the other element. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in connection with the embodiments.

[0092]It is important to understand that the terms “length”, “width”, “top”, “bottom”,“front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”,“outside” and the like indicate orientations or positional relationships based on those shown in the accompanying drawings, and are intended only to facilitate the description of the present application and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as a limitation of the present application.

[0093]Furthermore, the terms “first” and “second” are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with the terms “first” and “second” may expressly or implicitly include one or more such features. In the description of this application, “more than one” means two or more, unless otherwise expressly and specifically limited.

[0094]Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the art belonging to this application. The terms used in this specification in the specification of this application are used only for the purpose of describing specific embodiments and are not intended to limit this application. The term “and/or” as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0095]The first embodiment, as shown in FIG. 1a to FIG. 1f.

[0096]Referring to FIG. 1a, FIG. 1a is a schematic diagram of the overall structure of a fan module 1 of the first embodiment of the present application.

[0097]As shown in FIG. 1a, a fan module 1, comprising: a wind guide cover 11, an air duct 10, and a fan assembly 12, wherein the wind guide cover 11 is provided with an air inlet 111; the air duct 10 is provided with an air outlet 101 corresponding to the air inlet 111, and the end of the air duct 10 facing away from the air outlet 101 is connected to the end of the wind guide cover 11 facing away from the air inlet 111. The fan assembly 12 is connected within the air duct 10, and at least a portion of the structure of the fan assembly 12 extends out of the air duct 10 into the wind guide cover 11.

[0098]In this embodiment, the wind guide cover 11 and the air duct 10 are connected by means of a snap fit. However, the method of connecting the wind guide cover 11 and the air duct 10 is not limited to this, and depending on the specific application scenario, in some embodiments, the wind guide cover 11 and the air duct 10 are also capable of being connected by (not limited to): gluing, lapping, or heat-pressing fusion. The wind guide cover 11 and the air duct 10 can be separate or integrated.

[0099]Referring to FIG. 1b, FIG. 1b is a schematic structure of a flexible housing 15 of the first embodiment of the present application.

[0100]As shown in FIG. 1b, in some embodiments, the wind guide cover 11 and the air duct 10 are also externally provided with a flexible housing 15, the flexible housing 15 being specifically a silicone casing. However, the material of the flexible housing 15 is not limited to this, according to the specific application scenarios, in some embodiments, the material of the flexible housing 15 can be (not limited to): foam, paper or fabric. The flexible housing 15 is provided to provide better protection for the wind guide cover 11, the air duct 10, and the fan assembly 12. At the same time, when the fan module 1 is used as a modular accessory of the fan, the deformation ability of the flexible housing 15 can well adapt to different fan housing sizes, and the larger friction coefficient on the surface of the flexible housing 15 can also enable the fan module 1 to be more securely connected to the fan housing.

[0101]When the wind guide cover 11 and the air duct 10 are externally sheathed with the flexible housing 15, the wind guide cover 11 and the air duct 10 are capable of being connected in a lap joint.

[0102]A plurality of bulge loops 151 are formed by projections on the outer surface of the flexible housing 15. The plurality of bulge loops 151 are spaced apart along the vertical length of the flexible housing 15. For example, the flexible housing 15 is provided with three bulge loops 151 located at two ends and a middle position of the flexible housing 15. However, the number and arrangement of the bulge loops 151 on the flexible housing 15 is not limited to this, and depending on the specific application scenario, in some embodiments, the number of bulge loops 151 on the flexible housing 15 is capable of being (not limited to): two, four, five, six, or more. The arrangement between the bulge loops 151 can be (not limited to): spaced apart, equally spaced apart, centrally arranged, and the like. The setting of the bulge loops 151 can reduce the contact area between the fan module 1 and the fan housing, improve the assembly efficiency of the fan module 1 and the fan housing, and, at the same time, enable the bulge loops 151 to have a larger deformation space, and be able to adapt to a larger range of fan housing sizes.

[0103]In some embodiments, a plurality of bulge points 152 are formed raised on the exterior surface of the flexible housing 15, the plurality of bulge points 152 being evenly spaced on the exterior surface of the flexible housing 15. The provision of the bulge points 152 can reduce the contact area between the fan module 1 and the fan housing, improve the assembly efficiency of the fan module 1 and the fan housing, and, at the same time, enable the bulge points 152 to have a larger deformation space, and be able to adapt to a wider range of fan housing sizes.

[0104]In some embodiments, a plurality of bulge loops 151 and a plurality of bulge points 152 are formed projectively on an exterior surface of the flexible housing 15, and a plurality of bulge points 152 are arranged between two adjacent bulge loops 151. Wherein a number of the bulge points 152 is much larger than the number of the bulge loops 151, and the vertices of the bulge points 152 are flush with the exterior surface of the bulge loops 151. The combined configuration of the bulge loops 151 and the bulge points 152 results in a larger contact area between the flexible housing 15 and the fan housing 20 and a more stable connection than a structure in which the bulge loops 151 or the bulge points 152 are provided separately. The spacing between the bulge loops 151 and the bulge points 152 provides greater deformation space for each, allowing them to accommodate a wider range of fan housing sizes.

[0105]In some embodiments, the housing of the wind guide cover 11 and the air duct 10 external set can be: a metal housing or a rigid plastic housing.

[0106]Referring to FIG. 1c, FIG. 1c is a schematic structure of a wind guide cover of the first embodiment.

[0107]As shown in FIG. 1c, in the present embodiment, the wind guide cover 11 is constructed as a cylindrical barrel and is concave in the exterior of the wind guide cover 11, so that the inner surface of the wind guide cover 11 is raised to form a necking ring 112. The necking ring 112 being provided at a position corresponding to the end of the fan blade assembly 14 that faces the air inlet 111. The necking ring 112 divides the wind guide cover 11 into two flared barrel-shaped structures: a first enclosure 113 and a second enclosure 114. The air inlet 111 is formed on the first enclosure 113, and the second enclosure 114 is connected to the air duct 10. There is a smooth transition between the first enclosure 113 and the necking ring 112, and there is also a smooth transition between the second enclosure 114 and the necking ring 112. The hub 141 and the plurality of fan blades 142 of the fan blade assembly 14 are both cantilevered within the second enclosure 114, and the second enclosure 114 is constructed with a curved inner surface corresponding to the hub 141. The inner surface of the wind guide cover 11 is constructed to be smooth, and has a better guiding effect on the airflow. The setting of the necking ring 112 pressurizes the airflow entering the wind guide cover 11 once, so that the airflow entering the wind guide cover 11 has a higher initial velocity and the airflow is faster. And the necking ring 112 is provided at a position corresponding to the end of the fan blade assembly 14 facing the air inlet 111, which is able to block and guide the reverse airflow generated during the rotation of the fan blade assembly 14, improving the air outlet efficiency of the fan module 1. The inner surface of the second enclosure 114, corresponding to the hub 141 is constructed in the shape of an arc, capable of guiding the transverse airflow generated by the rotation of the fan blades 142, so that the airflow thereof collides with the surface of the second enclosure 114 from the transverse direction, and is turned to be biased in the direction of the air outlet 101, which improves the efficiency of the air outlet.

[0108]In some embodiments, a plurality of stiffeners 115 are provided on the outer surfaces of the first enclosure 113 and the second enclosure 114. Each of the stiffener 115 is coupled to the first enclosure 113, the necking ring 112, and the second enclosure 114. The number of stiffener 115 is two. However, the number of stiffener 115 is not limited to this, and depending on the specific application scenario, in some embodiments, the number of stiffener 115 is capable of being (not limited to): three, four, five, or more.

[0109]The first enclosure 113, the necking ring 112 and the second enclosure 114 connection are capable of being manufactured in one piece or separately manufactured and then spliced and then assembled.

[0110]Referring to FIG. 1d and FIG. 1e, FIG. 1d is a schematic diagram of the fan module split of the first embodiment; FIG. 1e is a sectional view of the fan module of the first embodiment.

[0111]As shown in FIG. 1d and FIG. 1e, the fan assembly 12 includes: a motor assembly 13 and a fan blade assembly 14, one end of the motor assembly 13 is connected to the air duct 10, and the fan assembly 12 is socketed to the motor assembly 13. Wherein, the fan blade assembly 14 comprises: a hub 141, a connecting ring 143, and a plurality of fan blades 142, the plurality of fan blades 142 being provided around the surface of the hub 141 along a circumferential direction of the hub 141, one end of the connecting ring 143 being connected to the hub 141, and the other end of the connecting ring 143 being socketed on the motor assembly 13. The motor assembly 13 comprises: a rotating shaft 133, a coil 131 and a magnetic ring 132, the storage cylinder 102 is provided with a connecting portion 16, one end of the rotating shaft 133 is connected to the storage cylinder 102, the other end of the rotating shaft 133 is connected to the fan blade assembly 14, the coil 131 is provided on the connecting portion 16, the magnetic ring 132 is provided on the fan blade assembly 14 and the magnetic ring 132 is socketed on the coil 131.

[0112]In the present embodiment, the hub 141 is constructed to be tapered. The tapered hub 141 increases the gap between the hub 141 and the inner edge surface of the first enclosure 113, which in turn enables a greater area of the fan blades 142 and enhances the air output efficiency of the fan module 1. However, the construction of the hub 141 is not limited to this, and depending on the specific application scenarios, in some embodiments, the hub 141 can be constructed as: hemispherical, cylindrical, or prismatic, and the like.

[0113]Each of the plurality of fan blades 142 extends curved along the tapered surface of the hub 141 from the direction of the air inlet 111 toward the air outlet 101, and the plurality of fan blades 142 are curved in a direction opposite to the direction of rotation of the fan blade assembly 14. Each fan blade 142 of the plurality of fan blades 142 comprises: a first end portion 1421 adjacent to the air outlet 101 and a second end portion 1422 corresponding to the first end portion 1421, with a width of the first end portion 1421 being greater than a width of the second end portion 1422. This construction of the fan blades 142 enables the first end portion 1421 to have a larger contact area with the airflow when cutting the air, providing stronger binding force on the airflow, and pushing more airflow into the fan blade airway formed by the two adjacent fan blades 142. In the process of the airflow flowing from the first end portion 1421 to the second end portion 1422, the width of the fan blades 142 gradually decreases, and the binding capacity of the fan blades 142 on the airflow gradually decreases, releasing part of the energy of the airflow, reducing the kinetic energy of the collision of the airflow out of the fan blade with the second enclosure 114 and the air duct 10, reducing the loss of energy of the airflow, and improving the efficiency of the airflow.

[0114]The blade pitch between two adjacent fan blades 142 of the plurality of fan blades 142 gradually increases along the direction of the air inlet 111 towards the air outlet 101. The spacing of the fan blades 142 between adjacent fan blades 142 along the direction of the airflow flow is increasing, which can gradually release the energy of the airflow during the airflow flow, reduce the kinetic energy of the collision of the airflow outflow fan blades with the second enclosure 114 and the air guide shell 104, reduce the loss of energy of the airflow, and increase the efficiency of the airflow.

[0115]The hub 141 and the plurality of fan blades 142 are disposed within the wind guide cover 11, one end of the connecting ring 143 socketed to the motor assembly 13 extends into the air duct 10, and the end of the connecting ring 143 connecting the hub 141 is disposed within the wind guide cover 11. Specifically, the hub 141 and the plurality of fan blades 142 are disposed within the first enclosure 113, the connecting ring 143 is partially structured to extend into the air duct 10, and the other end of the connecting ring 143 is connected to a bottom surface of the hub 141.

[0116]The hub 141 has a clearance between the bottom surface of the hub 141 and a position corresponding to the air duct 10 to facilitate rotation of the fan blade assembly 14.

[0117]In this embodiment, the number of fan blades 142 is: five. However, the number of fan blades 142 is not limited to this, and depending on the specific application scenario, in some embodiments, the number of fan blades 142 is capable of being (not limited to): two, three, four, six, or more.

[0118]Referring to FIG. 1f, FIG. 1f is a schematic structure of an air duct 10 of the first embodiment.

[0119]The air duct 10 comprises: a air guide shell 104, a storage cylinder 102 and a plurality of air guide plates 103, the storage cylinder 102 is provided in the air guide shell 104, a plurality of air guide plates 103 are arranged in a circumferential surrounding row along the storage cylinder 102, and one end of the plurality of air guide plates 103 is connected to the inner surface of the air guide shell 104, the other end of the plurality of air guide plates 103 is connected to the storage cylinder 102, and the air guide shell 104 is connected to the wind guide cover 11. The air guide shell 104 is connected to the wind guide cover 11, the motor assembly 13 is connected to the storage cylinder 102, and the air guide shell 104, the storage cylinder 102, and the plurality of air guide plates 103 enclose to form the air outlet 101.

[0120]The air guide shell 104 is constructed in the shape of a tube, one end of the air guide shell 104 is connected to the second enclosure 114 of the wind guide cover 11, and the other end of the air guide shell 104 is provided with an air outlet 101. The air guide shell 104 is provided with a storage cylinder 102 inside the air guide shell 104, the storage cylinder 102 is provided in the centre of the air guide shell 104 in a vacant position, and a plurality of air guide plates 103 are connected to the air guide shell 104 and the storage cylinder 102 respectively. A gap is left between the air guide shell 104 and the storage cylinder 102 for airflow. The number of air guide plates 103 is specifically seven. However, the number of air guide plates 103 is not limited to this, and according to the specific application scenarios, in some embodiments, the number of air guide plates 103 can be two, three, four, five, six, eight or more. The air guide plates 103 divide the air outlet 101 into a plurality of curved fan channels 105.

[0121]The plurality of air guide plates 103 are curved at one end near the fan assembly 12, and the curvature direction of the curved end of the plurality of air guide plates 103 is opposite to the rotation direction of the fan assembly 12. The curvature direction of the air guide plate 103 is opposite to the rotational direction of the fan assembly 12, and when the fan assembly 12 rotates, it will drive the airflow to rotate in the same direction, at which time, the curvature direction of the air guide plate 103 is opposite to the direction of rotation of the airflow, and the airflow rotates with the curved part of the air guide plate 103 in contact with collision, and because of the opposite direction, the angle of the airflow in contact with the curved part of the air guide plate 103 is greater than 90 degrees, and the airflow is driven by the larger angle of contact with the air guide plate 103 can reduce the kinetic energy loss of the airflow in contact with the air guide plate 103. The larger angle allows the airflow to be guided significantly by the air guide plate 103 during contact with the air guide plate, the energy loss is small, and the efficiency of the wind is greatly improved.

[0122]The storage cylinder 102 is constructed in the shape of a column, and the surface of the storage cylinder 102 located on the side of the air outlet 101 is provided with a top cover 1022. The top cover 1022 can be manufactured and moulded integrally with the storage cylinder 102, or can be manufactured separately and then combined and connected. A storage cavity 1021 is provided on the side of the storage cylinder 102 connected to the motor assembly 13, and one end of the connecting ring 143 of the fan blade assembly 14 extends into the storage cylinder 102.

[0123]The hub 141 and the plurality of fan blades 142 are provided between the necking ring 112 and the storage cylinder 102. At this time, the hub 141 acts as a shield for the storage cylinder 102, which can avoid the airflow from the fan blades 142 to flow into the storage cylinder 102, resulting in unnecessary energy loss, and improve the efficiency of the air outlet. The necking ring 112 can reduce the airflow inside the fan module 1 for backflow, which can also further improve the air outlet efficiency.

[0124]In some embodiments, the cross-sectional area of one end of the hub 141 connecting the connecting ring 143 is greater than or equal to the cross-sectional area of the storage cylinder 102. As the hub 141 acts as a shield between the storage cylinder 102 and the storage cavity 1021, when the cross-sectional area of the end of the hub 141 connecting to the connecting ring 143 is greater than or equal to the cross-sectional area of the storage cylinder 102, the hub 141 is able to minimize the extent to which the airflow flows through the fan blades 142 collides and contacts with the edges of the storage cylinder 102, and is also able to prevent the airflow from backing up and entering into the storage cavity 1021, in order to avoid unnecessary energy loss, and further improving the air outlet efficiency.

[0125]Referring to FIG. 1g, FIG. 1g is a sectional view of a bracket connected to a fan assembly of the first embodiment.

[0126]As shown in FIG. 1g, the connecting portion 16 comprises: a bracket 161, an end of the storage cylinder 102 bulges inwardly to form an assembly frame 1024, the assembly frame 1024 is provided with assembly holes 1025 through the assembly frame 1024, one end of the bracket 161 is inserted into and threaded out of the assembly holes 1025, and the end of the bracket 161 that threads out of the assembly holes 1025 is connected to the rotating shaft 133.

[0127]Specifically, the top cover 1022 of the storage cylinder 102, bulges inwardly to form an assembly frame 1024, with assembly holes 1025 provided through the assembly frame 1024. The assembly frame 1024 is constructed to be tapered. The shape construction of the assembly frame 1024 is not limited to this, and depending on the specific application scenario, in some embodiments, the assembly frame 1024 can be (not limited to): ring-shaped or prismatic.

[0128]In some embodiments, the bracket 161 and the assembly frame 1024 are of the same material, and the bracket 161 and the assembly frame 1024 can be manufactured and moulded in one piece. In some embodiments, the bracket 161 is a metal tube, and the bracket 161 and the assembly frame 1024 are combined by injection moulding. In some embodiments, the bracket 161 is snap coupled to the assembly shelf 1024.

[0129]Combined with FIG. 1d and FIG. 1f, the connecting portion 16 further includes: a first shaft sleeve 164, a second shaft sleeve 163, and a circlip 162, the bracket 161 is provided with a mounting hole 1611 through the bracket 161, the mounting hole 1611 is bulged inside to form a limit ring 1612, the first shaft sleeve 164 and the second shaft sleeve 163 are respectively provided at the two ends of the limit ring 1612, the circlip 162 is provided in the mounting hole 1611 and lapped with the second shaft sleeve 163, and one end of the rotating shaft 133 is connected to the circlip 162 after passing through the first shaft sleeve 164 and the second shaft sleeve 163. The end of the rotating shaft 133 connected to the circlip 162 is provided with a securing slot 136 that cooperates with the circlip 162. The first shaft sleeve 164 and the second shaft sleeve 163 are made of metal, and the setting of the first shaft sleeve 164 and the second shaft sleeve 163 improves the rotational efficiency of the rotating shaft 133 of the motor assembly 13, and also avoids wear and tear in the contact between the rotating shaft 133 and the mounting holes 1611.

[0130]The magnetic ring 132 of the motor assembly 13 is socketed at a position where the bracket 161 is provided with a first shaft sleeve 164, since, the first shaft sleeve 164 is made of metal, the metal first shaft sleeve 164 can increase the physical strength of the bracket 161, and by socketed the magnetic ring 132 at a position where the bracket 161 is provided with a first shaft sleeve 164, the connection between the magnetic ring 132 and the bracket 161 is more stable. The magnetic ring 132 and the bracket 161 are connected by an interference fit, however, the connection method is not limited to this, and depending on the specific application scenario, in some embodiments, the magnetic ring 132 is able to be connected to the bracket 161 by means of a snap-fit or gluing.

[0131]Specifically, the first shaft sleeve 164, the second shaft sleeve 163 and the bracket 161 are connected by an interference fit. However, the connection method is not limited to this, and depending on the specific application scenario, in some embodiments, the first shaft sleeve 164, the second shaft sleeve 163, and the bracket 161 are capable of being secured to each other by means of snap-fit, gluing, and adhesion.

[0132]In some embodiments, the first shaft sleeve 164 and the second shaft sleeve 163 can be replaced with bearings.

[0133]In some embodiments, the motor assembly 13 further comprises: a motor casing 134, the motor casing 134 socketed to the magnetic ring 132, the connecting ring 143 socketed to the motor casing 134, and an end of the rotating shaft 133 connected to the fan blade assembly 14 penetrating the motor casing 134. The motor assembly 13 further comprises: a conical helical spring 135, the conical helical spring 135 socketed to the rotating shaft 133, an end of the conical helical spring 135 is connected to the motor casing 134 at one end, and the other end of the conical helical spring 135 is connected to the first shaft sleeve 164. The conical helical spring 135 is provided to enable the fan blade assembly 14 to have a certain buffer displacement space when impacted by an external force, which protects the fan blade assembly 14. And at the same time, avoids rigidly transmitting the vibration generated by the rotation of the fan blade assembly 14 to the entire fan module 1, which results in larger vibration, and also reduces the wind noise of the rotation of the fan blade assembly 14.

[0134]In some embodiments, the magnetic ring 132 is formed with a plurality of magnetic sheets spaced apart.

[0135]In some embodiments, when the motor assembly 13 is not provided with a motor casing 134, one end of the conical helical spring 135 is able to be directly coupled to the hub 141 and the other end is coupled to the first shaft sleeve 164.

[0136]The conical helical spring 135 is connected to the motor casing 134 or hub 141 by (not limited to): a lap joint or a glued connection. The conical helical spring 135 is connected to the first shaft sleeve 164 by (not limited to): lapping, welding, or gluing.

[0137]In some embodiments, the top cover 1022 of the storage cylinder 102 is provided with an thread hole 1023, and the wire 17 passes through the thread hole 1023 to connect with the coil 131. Connecting the wire 17 to the coil 131 by extending the wire 17 directly into the storage cavity 1021 through the thread hole 1023 can avoid the wire 17 from being routed from the outside of the storage cylinder 102, reduce the obstruction to the flowing airflow inside the fan module 1, and improve the efficiency of the air outlet. In this embodiment, the fan module 1 includes the wind guide cover 11 and the air duct 10, and part of the structure of the fan assembly 12 is set in the air duct 10, and the other part extends into the wind guide cover 11, and this layout structure enables the fan module 1 to have a higher space utilization rate, a more compact structure, and a more compact size. At the same time, the airflow channel of the fan module 1 comprising the wind guide cover 11 and the air duct 10 is able to guide the airflow entering therein, so that the airflow can flow from the air inlet 111 to the air outlet 101 more efficiently. And setting a part of the structure of the fan assembly 12 within the air duct 10 reduces the part of the fan assembly 12 that is directly exposed, which also reduces the contact area of the fan assembly 12 with the airflow, reducing obstruction of the airflow, improving the efficiency of the air outlet.

[0138]The second embodiment, as shown in FIG. 2a to FIG. 2j.

[0139]Referring to FIG. 2a and FIG. 2b, FIG. 2a is a schematic diagram of the overall structure of a fan module 2; FIG. 2b is a schematic diagram of the disassembled structure of the fan module 2.

[0140]As shown in FIG. 2a and FIG. 2b, a fan module 2, comprising: a fan housing 20, a connecting piece 21, an assembly base 22 and a fan assembly 25. The connecting piece 21 is provided in the fan housing 20, and a fan channel 202 is provided in the connecting piece 21; the assembly base 22 is connected to the connecting piece 21; the fan assembly 25 is socketed and connected to the assembly base 22 and the fan assembly 25 is connected to the assembly base 22 by a rotating shaft 233.

[0141]In the above embodiment, the connecting piece 21 is provided in the fan housing 20, the assembly base 22 is connected to the connecting piece 21, the fan assembly 25 is connected to the assembly base 22, and the connection between the assembly base 22 and the fan assembly 25 comprises two ways. First, a portion of the structure of the fan assembly 25 is socket-mounted to the assembly base 22; second, a portion of the structure of the fan assembly 25 is also connected to the assembly base 22 by the rotating shaft 233. Through the multiplexed connection method of the fan assembly 25 and the assembly base 22, not only the connection stability of the fan assembly 25 and the assembly base 22 is increased, but at the same time, this composite connection method is able to greatly reduce the space occupied by the fan assembly 25 within the fan housing 20, so that the volume of the fan module 2 can be further reduced.

[0142]In this embodiment, the fan housing 20 is constructed in a cylindrical shape, and a cylindrical interior is opened with a cylindrical air chamber 201. However, the shape of the fan housing 20 is not limited to this, and depending on the specific application scenarios. In some embodiments, the shape of the fan housing 20 is capable of being: triangular, quadrilateral, pentagonal, other polygonal, or other regular shapes.

[0143]Referring to FIG. 2c, FIG. 2c is a sectional view of the fan module 2 of the second embodiment.

[0144]As shown in FIG. 2c, in this embodiment, the fan housing 20 is provided with an air chamber 201 running through its upper and lower surfaces, the air chamber 201 being constructed in a cylindrical shape. However, the shape of the air chamber 201 is not limited to this, and depending on the specific application scenario. In some embodiments, the shape of the air chamber 201 can be: star-shaped, heart-shaped, runway-shaped or polygonal and other shapes.

[0145]Referring to FIG. 2d and FIG. 2e, FIG. 2d is a schematic structural diagram of a first view of a fan housing 20 of the second embodiment; FIG. 2e is a schematic structural diagram of a second view of a fan housing 20 of the second embodiment.

[0146]As shown in FIG. 2d and FIG. 2e, the connecting piece 21 comprises: a connecting ring 211 and a plurality of connecting plates 212, the plurality of connecting plates 212 being disposed around the connecting ring 211, one end of each of the connecting plate 212 in the plurality of connecting plates 212 being connected to an inner surface of the fan housing 20, and the other end of each of the connecting plates 212 being connected to the connecting ring 211, and two adjacent connecting plates 212 in the plurality of connecting plates 212 being enclose to form the fan channel 202.

[0147]The provision of the plurality of connecting plates 212 enables the connecting ring 211 to be disposed suspended within the fan housing 20, and each two connecting plates 212 of the plurality of connecting plates 212 enclose to form a fan channel 202, which enables the airflow driven by the fan assembly 25 to flow through the fan channel 202.

[0148]In this embodiment, the number of connecting plates 212 is seven. However, the number of connecting plates 212 is not limited to this, and depending on the specific application scenario, in some embodiments, the number of connecting plates 212 is capable of being two, three, four, five, six, eight or more.

[0149]In some embodiments, the connecting piece 21 is a plate provided within the fan housing 20, the shape of the plate being the same as the shape of the internal cavity of the fan housing 20, and the plate being provided with a plurality of apertures for airflow.

[0150]The connecting piece 21 and the fan housing 20 are manufactured and moulded by a one-piece moulding process. However, the manufacturing process of the connecting piece 21 and the fan housing 20 is not limited to this, according to the specific application scenario, in some embodiments, the connecting piece 21 and the fan housing 20 can be separately processed and shaped, and then, assembled and connected by means of gluing, snap-fitting, riveting, or screw fixing.

[0151]In some embodiments, the connecting ring 211 comprises: an connecting outer ring 2111 and an connecting inner ring 2112, the connecting inner ring 2112 is provided within the connecting outer ring 2111, the connecting outer ring 2111 is connected to a plurality of connecting plates 212, the assembly base 22 is connected to the connecting inner ring 2112, and the connecting outer ring 2111 has a thickness greater than the thickness of the connecting inner ring 2112. It is to be noted that the thickness in this embodiment refers to: a height in a vertical direction perpendicular to the horizontal direction.

[0152]The thickness of the connecting outer ring 2111 is greater than the thickness of the connecting inner ring 2112, which enables that when the connecting inner ring 2112 is set inside the connecting outer ring 2111, there is still a spare space inside the connecting outer ring 2111, and the spare space can be used for setting the assembly base 22, which improves the space utilization rate of the fan module 2.

[0153]Each of the plurality of each of the connecting plates 212 facing the end of the fan assembly 25 is curved and extended in the direction of the fan assembly 25 to form a air guide plate 213, the air guide plate 213 being curved in a direction opposite to the direction of rotation of the fan assembly 25.

[0154]Specifically, each of the plurality of connecting plates 212 is formed with the air guide plate 213 facing the end of the fan blade assembly 24 in the fan assembly 25, and the air guide plate 213 is curved in a direction opposite to the direction of rotation of the fan blade assembly 24. In this embodiment, the curvature direction of the air guide plate 213 is opposite to the rotational direction of the fan blade assembly 24 means: the curvature direction of the air guide plate 213 is in the opposite direction of the rotational direction of the fan blade assembly 24 to each other, and it is not limited to the specific embodiment that the curvature direction of the wind guide plate 213 is in the direction of 180 degrees to the rotational direction of the fan blade assembly 24. In some embodiments, when the angle of curving of the air guide plate 213 is at an obtuse angle with the direction of rotation of the fan blade assembly 24, it is also within the scope of “opposite to the rotational direction” defined in this embodiment.

[0155]The curvature direction of the air guide plates 213 are opposite to the rotation direction of the fan blade assembly 24, when the fan blade assembly 24 rotates, it will drive the airflow to rotate in the same direction, at this time, the curvature direction of the air guide plates 213 are opposite to the direction of the rotation of the airflow, when the airflow is rotating, it is in contact and collision with the curved part of the air guide plates 213. Due to the direction of the opposite direction, then the airflow will have an angle of more than 90 degrees when it is in contact with the curved part of the air guide plates 213 and the airflow will flow by the larger angle of contact with the air guide plates 213 can reduce the kinetic energy loss of the airflow contacting the air guide plates 213. The larger angle allows the airflow to be guided significantly by the air guide plate 103 during contact with the air guide plate, the energy loss is small, and the efficiency of the wind is greatly improved.

[0156]In some embodiments, the air guide plates 213 are provided between the fan assembly 25 and the fan housing 20, and the air guide plates 213 are connected to an inner surface of the fan housing 20 with a gap between the air guide plates 213 and the fan assembly 25.

[0157]Specifically, the air guide plates 213 are provided between the motor assembly 23 and the fan housing 20, and the air guide plate 213 has a gap between the motor assembly 23.

[0158]In some embodiments, the air guide plates 213 are provided between the hub 241 of the fan assembly 24 and the fan housing 20, and the air guide plate 213 has a gap between the hub 241.

[0159]The air guide plates 213 are provided between the fan blade assembly 24 and the fan housing 20, and the air guide plate 213 has a gap between the air guide plate 213 and the fan blade assembly 24. The gap between the air guide plate 213 and the fan blade assembly 24 is such that after the airflow comes into contact with the air guide plate 213, part of the airflow flows to the air outlet along the guidance of the air guide plate 213, and the other part of the airflow flows to the next air guide plate 213 through the gap flow between the air guide plate 213 and the fan blade assembly 24. The gap between the air guide plate 213 and the fan blade assembly 24 provides a channel for the balance of air pressure between the air guide plates 213. This is to avoid the problem that the air pressure on both sides of the air guide plate 213 is inconsistent due to the complete closure of the air guide plate 213, which in turn affects the efficiency of the air output of the fan module 2.

[0160]The assembly base 22 is removably connected to the connecting piece 21 and the assembly base 22 is made of metal.

[0161]A plurality of first fixing holes 2115 are provided on the connecting piece 21, a plurality of second fixing holes 2211 are provided correspondingly on the assembly base 22, and the plurality of first fixing holes 2115 and the plurality of second fixing holes 2211 are connected by screws. The screw connection enables disassembly of the assembly base 22 and facilitates replacement and maintenance of the assembly base 22.

[0162]However, the means of detachable connection between the connecting piece 21 and the assembly base 22 is not limited to screwing. Depending on the specific application scenario, in some embodiments, the connecting piece 21 and the assembly base 22 are also capable of being connected to each other by means of a snap or lock connection.

[0163]The connecting piece 21 is provided with a positioning slot 2114, and the end of the assembly base 22 connected to the connecting piece 21 is provided in the positioning slot 2114.

[0164]The positioning slot 2114 is provided on the connecting inner ring 2112 of the connecting piece 21, and the provision of the positioning slot 2114 enables the base 221 in the assembly base 22 to be nested in the positioning slot 2114. This way facilitates the positioning alignment of the first fixing holes 2115 and the second fixing holes 2211 and optimizes the assembly process. Meanwhile, since the assembly base 22 needs to withstand the torque generated by the fan assembly 25 when the fan assembly 25 is rotating, and the magnitude of the torque is proportional to the rotational speed of the fan assembly 25. Therefore, when the generated torque is borne by the screws, the strength of the screws is required to be high, and at the same time, the service life of the screws will be affected. The setting of the positioning slot 2114, on the other hand, enables the assembly base 22 to be deflected and stopped by the positioning slot 2114, which is equivalent to sharing a part of the torque by the positioning slot 2114, and further greatly reduces the wear and tear on the screws and extends the service life of the fan module 2.

[0165]Specifically, the positioning slot 2114 is constructed as a rounded triangle, and the shape of the base 221 of the corresponding assembly base 22 is also constructed as a rounded triangle that cooperates with the positioning slot 2114, and the sides of the two adjacent rounded corners of the positioning slot 2114 are inwardly curved, and the sides of the two adjacent rounded corners of the corresponding assembly base 22 are also constructed as inwardly curved. The inner arc shape is constructed so that the sides of the positioning slot 2114 in contact with the assembly base 22 are arc-shaped, and when the fan assembly 25 rotates, the force of the assembly base 22 acting on the positioning slot 2114 is decomposed in different directions of the arc-shaped sides, instead of being concentrated in the same direction, which further reduces the force strength of the edges of the positioning slot 2114 and enhances the service life of the fan assembly 25.

[0166]In some embodiments, the shape of the positioning slot 2114 and the corresponding shape of the assembly base 22 are not limited, and depending on the specific application scenario, the shape of the positioning slot 2114 can be (not limited to): a running field shape, a polygon, an oval, and other shapes that can have a limiting effect on the same shaped embedded object. Similarly, the shape of the base 221 of the assembly base 22 can be changed according to the change in the shape of the positioning slot 2114.

[0167]In the present embodiment, the number of the first fixing holes 2115 is three, and the corresponding number of the second fixing holes 2211 is also capable of being three. The first fixing holes 2115 are respectively provided at rounded corner positions of the rounded triangle, and the second fixing holes 2211 are respectively provided at rounded corner positions of the rounded triangle of the base 221. However, the number of the first fixing holes 2115 and the number of the second fixing holes 2211 are not limited to this, and depending on the specific application scenarios, in some embodiments, the number of the first fixing holes 2115 and the number of the second fixing holes 2211 are (not limited to): two, four, five, or more, respectively.

[0168]In this embodiment, the assembly base 22 is made of metal and the fan housing 20 and the connecting piece 21 are made of plastic. The use of a metal material enables the assembly base 22 to be physically stronger and to be suitable for high-speed rotation of the fan assembly 25.

[0169]Specifically, the assembly base 22 is made of aluminium alloy. However, the material of the assembly base 22 is not limited to this, and depending on the specific application scenario, in some embodiments, the material from which the assembly base 22 is made is capable of being (not limited to): made of a conventional metal such as iron, aluminium, copper, etc., or made of an alloy material of iron or copper.

[0170]In some embodiments, the assembly base 22 and the fan housing 20 can be made of the same plastic material.

[0171]Continuing as shown in FIG. 2b, the fan assembly 25 comprises: a motor assembly 23 and a fan blade assembly 24, the motor assembly 23 is socketed and attached to the assembly base 22, and the motor assembly 23 is connected to the assembly base 22 by a rotating shaft 233, and the fan blade assembly 24 is connected to the assembly base 22 by a rotating shaft 233.

[0172]In the fan assembly 25, the motor assembly 23 is connected to the assembly base 22 and the rotating shaft 233, respectively, two connection methods, which can enable the motor assembly 23 to be cantilevered and set inside the fan housing 20, and at the same time, the sleeve mounting can enable the motor assembly 23 and the assembly base 22 to take up less space.

[0173]The motor assembly 23 comprises: a coil 231, a magnetic ring 232 and a motor shell 234, the coil 231 being socketed to the assembly base 22, the magnetic ring 232 being socketed to the coil 231, the motor shell 234 being socketed to the magnetic ring 232, and the motor shell 234 being fixedly connected to a rotating shaft 233 so as to enable the fan housing 20 to drive the rotating shaft 233 for rotation.

[0174]In this embodiment, when the coil 231 is energized, it drives the magnetic ring 232 to rotate, which in turn drives the motor shell 234 to rotate, and finally the motor shell 234 drives the rotating shaft 233 to rotate. This way of driving the motor enables the motor assembly 23 to be socketed on the assembly base 22. At the same time, the motor assembly 23 is made to rotate faster due to the larger force area of the magnetic ring 232 compared to the driven motor.

[0175]The coil 231 has an interference fit with the assembly base 22, the magnetic ring 232 is magnetically coupled to the coil 231, and the motor shell 234 has an interference fit with the rotating shaft 233. During rotation of the magnetic ring 232 and the coil 231, the magnetic ring 232 is in a suspended state for rotation, which is subject to less physical friction than conventional motors, and therefore can further increase the motor assembly 23 speed.

[0176]In some embodiments, the means of attachment of the coil 231 to the assembly base 22 is not limited to an interference fit. Depending on the specific application scenario, the method of connecting the coil 231 to the assembly base 22 can also be (not limited to): glued, welded, riveted, screwed, and other fixing methods.

[0177]In some embodiments, the motor shell 234 is not limited to an interference fit with the rotating shaft 233. Depending on the specific application scenario, the connection method between the motor shell 234 and the rotating shaft 233 can also be (not limited to): glued, welded, riveted, screwed, and other fixing methods.

[0178]Please continue in conjunction with FIG. 2b and FIG. 2f, FIG. 2f is a schematic structure of a motor shell 234 of the second embodiment.

[0179]As shown in FIG. 2f, in some embodiments, a limit stop edge 238 is provided on the interior of the motor shell 234, with the limit stop edge 238 resting against one end of the magnetic ring 232. The motor shell 234 is provided with the limit stop edge 238 on the interior of the motor shell 234, so that the magnetic ring 232 can be assembled and limited quickly, avoiding the problem of inconsistent assembly of the position of the magnetic ring 232, and resulting in a change of the position of the motor housing 234 within the fan housing 20, and further in turn leads to poor rotational stability of the fan module 2 and easy friction damage.

[0180]The limit stop edge 238 on the motor shell 234 is formed due to variations in the thickness of the sidewalls of the motor shell 234. The motor shell 234 has a greater thickness of sidewall at the end adjacent to the fan blade assembly 24, and the motor shell 234 has a lesser thickness of sidewall at the end adjacent to the connecting piece 21. The variation in thickness of the sidewalls of the motor shell 234 results in the formation of the limit stop edge 238 within the motor shell 234.

[0181]In some embodiments, the limit stop edge 238 inside the motor shell 234, can be a limit stop edge 238 formed by an elevation of the inner surface of the motor shell 234.

[0182]The fan blade assembly 24 comprises: a hub 241 and a plurality of fan blades 242, the plurality of fan blades 242 being disposed around the hub 241, and the hub 241 being connected to a rotating shaft 233.

[0183]Referring to FIG. 2g and FIG. 2h, FIG. 2g is a schematic structural diagram of a first view of the fan blades 242 of the second embodiment; FIG. 2h is a schematic structural diagram of a second view of the fan blades 242 of the second embodiment.

[0184]As shown in FIG. 2g and FIG. 2h, the number of fan blades 242 in this embodiment is nine. However, the number of fan blades 242 is not limited to this, and depending on the specific application scenario, in some embodiments, the number of fan blades 242 is capable of being (not limited to): two, three, four, five, six, seven, eight, ten, eleven or more.

[0185]The hub 241 comprises: a top surface 2411, a bottom surface 2413, and a side surface 2412, the bottom surface 2413 having a cross-sectional area greater than the cross-sectional area of the top surface 2411, and a smooth transition between the top surface 2411 and the side surface 2412. That is, the hub 241 in this embodiment is constructed in the shape of a bullet head with a planar head. This shape of the hub 241 enables the airflow flowing through the fan blades 242 to flow along the curved surface formed by the smooth transition between the top surface 2411 and the side surface 2412, which has a good guiding effect on the airflow to form an attachment wall effect, improves the efficiency of the airflow flowing through the fan blade assembly 24, and thus improves the airflow efficiency of the fan module 2.

[0186]However, the shape of the hub 241 is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the hub 241 is capable of being (not limited to): hemispherical, conical, daisy-shaped, cylindrical, and other shapes.

[0187]The top surface 2411 of the hub 241 is a circular surface. However, the shape of the top surface 2411 is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the top surface 2411 of the hub 241 is also capable of being: conical, polygonal, oval, or other shapes.

[0188]Each of the plurality of fan blades 242 includes a first end portion portion 2421, and a second end portion 2422 opposite the first end portion 2421, the first end portion 2421 having a length greater than the length of the second end portion 2422. Wherein the first end portion 2421 is disposed adjacent a top surface 2411 of the hub 241 and the second end portion 2422 is disposed adjacent a bottom surface 2413 of the hub 241. In each fan blade 242, the first end portion 2421 is used to push airflow into the fan assembly 24 as the fan assembly 24 rotates, and the longer length of the first end portion 2421 facilitates pushing on the airflow. The second end portion 2422 is located at the end of the airflow flow direction, and the reduction of the length of the second end portion 2422 is conducive to reducing the size of the space for the airflow flow, compressing the airflow, increasing the initial kinetic energy of the airflow flow, and thus enhancing the airflow efficiency of the fan module 2.

[0189]Each fan blade 242 is provided with a blade edge 2423, and the thickness of each fan blade 242 gradually increases in the direction from the first end portion 2421 to the blade edge 2423, and the thickness of each fan blade 242 gradually decreases in the direction from the blade edge 2423 to the second end portion 2422. The thickness of the different parts of the fan blades 242 changes, so that each fan blade 242 is constructed as a structure with thinner ends and thicker middle, and this structure enhances the cutting ability of the ends of the fan blades 242 on the airflow, and reduces the air resistance at the ends of the fan blades 242. The increase in thickness of the middle part can enhance the physical strength of the fan blades 242, and at the same time, the increase in thickness of the fan blades 242 reduces the space between two neighbouring fan blades 242, and acts as a pressurizing effect on the airflow flowing through.

[0190]Referring to FIG. 2i and FIG. 2j, FIG. 2i is a schematic structural diagram of a first view of an assembly base 22 of the second embodiment; FIG. 2j is a schematic structural diagram of a second view of an assembly 22 base of the second embodiment.

[0191]As shown in FIG. 2i and FIG. 2j, the assembly base 22 includes: a base 221 and a connecting column 222, the base 221 is attached to the connecting piece 21, the connecting column 222 is attached to the base 221, and the fan assembly 25 is socketed and attached to the connecting column 222.

[0192]The shape of the base 221 is constructed as a rounded triangle, and the sides of two adjacent rounded corners of the base 221 are also constructed as internal arcs. With the construction of the inner arc shape, when the fan assembly 25 is rotating, the force of the base 221 acting on the positioning slot 2114 is decomposed in different directions of the arcuate edges, instead of being concentrated in the same direction, which further reduces the strength of the force on the edge of the positioning slot 2114, and enhances the service life of the fan assembly 25.

[0193]In some embodiments, the shape of the base 221 is not limited to this, and depending on the specific application scenario, the shape of the base 221 is capable of being (not limited to): a running field shape, a polygonal shape, an oval shape, and other shapes.

[0194]The connecting column 222 includes: a first column 2221 and a second column 2222, the first column 2221 having a diameter greater than the diameter of the second column 2222, the first column 2221 being connected to the base 221, the second column 2222 being connected to the first column 2221, and the fan assembly 25 being socketed and connected to the second column 2222.

[0195]The diameter of the first column 2221 is greater than the diameter of the second body such that the first column 2221 and the second column 2222 form a stepped structure. The first post body 2221 can act as a stop member of the motor assembly 23 or the PCB circuit board, facilitating the assembly of the motor assembly 23 or the PCB circuit board.

[0196]In some embodiments, the shape of the connecting column 222 is not limited, and depending on the specific application scenario, the connecting column 222 is capable of being (not limited to): a straight column, a prismatic column, or a composite structure comprising a circular platform and a straight column.

[0197]A connecting hole 223 is provided in the connection column 222, a first bearing 224 and a second bearing 225 are provided at each end of the connecting hole 223, a rotating shaft 233 is inserted into and threaded out of the first bearing 224 and the second bearing 225, and a securing slot 236 is provided at the end of the rotating shaft 233 that is threaded out of the second bearing 225, and a circlip 235 is connected to the securing slot 236.

[0198]The setting of the first bearing 224 and the second bearing 225 can make the rotation of the rotating shaft 233 more smooth. At the same time, the setting of the two rotating shafts 233 makes the linear rotation of the rotating shafts 233 more stable, which can make the rotation speed of the motor assembly 23 faster. The setting of the securing slot 236 and the circlip 235 can prevent the rotating shaft 233 from falling out of the first bearing 224 and the second bearing 225, enhancing the stability and reliability of the connection of the rotating shaft 233.

[0199]The base 221 comprises: a first projection 2212, a second projection 2213, and a third projection 2214, with an inner arc notch 2215 formed between each of the first projection 2212, the second projection 2213, and the third projection 2214, and the second projection 2213 and the third projection 2214 being connected by an outer arc tab 2216.

[0200]The second fixing holes 2211 are provided on the first projection 2212, the second projection 2213, and the third projection 2214, respectively. The thickness of the an outer arc tab 2216 is less than the thickness of the body of the base 221, and the second thread hole 2217 is provided on the outer arc tab 2216. The inner arc notch 2215 is constructed so that the edge of the positioning slot 2114 in contact with the base 221 is arcuate, and when the fan assembly 25 is rotating, the force of the base 221 acting on the positioning slot 2114 is decomposed in different directions of the arcuate edge, instead of being concentrated in the same direction, which further reduces the force intensity of the edges of the positioning slot 2114, and enhances the service life of the fan assembly 25.

[0201]In some embodiments, in conjunction with FIG. 2c, FIG. 2f, and FIG. 2h, the fan assembly 25 is provided with an connecting desk 237 at a location where the fan assembly 25 is attached to the rotating shaft 233, the rotating shaft 233 penetrates the connecting desk 237 and is interference fitted with the connecting desk 237, and the end of the connecting desk 237 that faces the first bearing 224 resists against the first inner ring 2241 of the first bearing 224.

[0202]Specifically, at the location where the motor shell 234 of the fan assembly 25 is connected to the rotating shaft 233, a connecting desk 237 is formed by extending projections in the direction facing the connecting column 222. The setting of the connecting desk 237 can increase the contact area between the motor shell 234 and the rotating shaft 233, enhance the strength of the connection between the motor shell 234 and the rotating shaft 233. It can effectively prevent the problem of unstable connection and short service life due to too small a contact area between the motor shell 234 and the rotating shaft 233, which leads to excessive local force.

[0203]In some embodiments, the connection of the connecting desk 237 to the rotating shaft 233 is not limited to an interference fit. Depending on the specific application scenario, the connection method of the connecting desk 237 and the rotating shaft 233 is also capable of being (not limited to): glued, welded, riveted, screwed, and other fixing methods.

[0204]Continuing to combine the FIG. 2c, the connecting desk 237 and the first inner ring 2241 of the first bearing 224 are offset, so that when the motor shell 234 drives the rotating shaft 233 to rotate, in addition to the rotating shaft 233 driving the first inner ring 2241 to rotate, the connecting desk 237 is also able to provide a driving force for the first inner ring 2241. Effectively preventing the relative rotation or slippage between the shaft 233 and the first inner ring 2241 due to long-term use, which could cause the first inner ring 2241 and the shaft 233 to rotate unsynchronously, thereby reducing the rotational efficiency of the shaft 233. At the same time, when the motor shell 234 rotates, it will drive the first inner ring 2241 of the first bearing 224 to rotate, and the first inner ring 2241 can synchronously drive the rotating shaft 233 to rotate, which in fact extends the length of the force of the rotating shaft 233, shortens the rotating torque of the rotating shaft 233, and reduces the strength of the force per unit area of the rotating shaft 233, and extends its service life. The rotating torque of the rotating 233 is shortened, the intensity of force per unit area of the rotating shaft 233 is reduced, and its service life is extended. At the same time, it can make the rotation of the rotating shaft 233 more stable and reduce the vibration and noise of the fan module 2.

[0205]In some embodiments, a shaft sleeve 226 is provided between the second bearing 225 and the circlip 235, the shaft sleeve 226 being socketed on the rotating shaft 233, with the end of the shaft sleeve 226 facing the rotating shaft 233 resting against the second inner ring 2251 of the second bearing 225.

[0206]The setting of the shaft sleeve 226 can prevent the rotating shaft 233 from contacting the circlip 235 with the second bearing 225 after slipping with the first bearing 224 and the second bearing 225, the contact of the circlip 235 and the second bearing 225 will cause friction damage. The end of the shaft sleeve 226 facing the second bearing 225 is offset from the second inner ring 2251, which enables the shaft sleeve 226 to rotate synchronously with the rotating shaft 233 and the second inner ring 2251, and avoids friction and collision damage with the rotating rotating shaft 233 and the second bearing 225 due to the lack of driving force of the shaft sleeve 226.

[0207]In some embodiments, the shaft sleeve 226 resists the circlip 235 at one end and resists the second inner ring 2251 of the second bearing 225 at the other end.

[0208]The shaft sleeve 226 is made of an alloy material or a metallic material. However, the material of the shaft sleeve 226 is not limited to this. Depending on the specific application, in some embodiments, the shaft sleeve 226 can be made of plastic or rubber materials.

[0209]In some embodiments, one end of the rotating shaft 233 coupled with the circlip 235 is disposed inside of the connecting inner ring 2112. Preventing frictional damage between the protruding end of the shaft 233 and other components.

[0210]In some embodiments, a PCB circuit board is provided between the base 221 and the fan assembly 25, and the PCB circuit board is socketed on the connecting column 222. The PCB circuit board is used to control functions such as starting, stopping, and rotational speed variation of the motor assembly 23. The PCB circuit board is provided between the base 221 and the fan assembly 25 and socketed on the connecting column 222, which helps save internal space in the fan module 2 and improves space utilization within the module. At the same time, this arrangement shortens the distance between the PCB circuit board and the motor assembly 23, reducing the length of the connecting wires and saving materials.

[0211]The PCB circuit board is constructed in a circular shape as a whole. However, the shape of the PCB circuit board is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the PCB circuit board is capable of being (not limited to): polygonal, oval, or runway shaped, among other shapes.

[0212]The PCB circuit board is connected to the connecting column 222 by means of an interference fit. However, the fixing method of the PCB circuit board is not limited to this, and depending on the specific application scenario, in some embodiments, the PCB circuit board is also fixed to the coil 231 by screws.

[0213]In some embodiments, the connecting piece 21 is provided with a first thread hole 2113, the base 221 is provided with a second thread hole 2217 at a corresponding location of the first thread hole 2113, and a thickness of the base 221 at the location where the second thread hole 2217 is opened is less than a thickness of the other locations of the base 221.

[0214]In order to facilitate wire routing and keep the wires connected to the PCB circuit board from leaking out, a first thread hole 2113 is provided in the connecting piece 21, and a second thread hole 2217 is provided in the base 221. The provision of the first thread hole 2113 and the second thread hole 2217 allows the wires to be routed in a way that is not leaking out to improve the smoothness of the airflow flow inside the fan module 2. At the same time, the thickness of the base 221 at the position where the second thread hole 2217 is opened is smaller than the thickness of the other positions of the base 221, which can reduce the overall weight of the base 221 and make the fan module 2 more lightweight. The design of the thickness variation and the design of the positioning slot 2114 cooperate with each other to make the side of the base 221 facing the motor assembly 23 more flat and neat.

[0215]In some embodiments, the fan housing 20 is provided with a flexible housing 26, and bulge loops 261 and bulge points 262 are alternately provided on the exterior of the flexible housing 26. The provision of the flexible housing 26 can increase the friction between the fan module 2 and an external object or other mating structure, so as to make the connection of the fan module 2 more stable. At the same time, the setting of the flexible housing 26 can also effectively buffer the physical vibration generated during the operation of the fan module 2, so that the rotation of the fan module 2 is more stable and less noise is generated.

[0216]Bulge loops 261 and bulge points 262 are alternately provided on the exterior of the flexible housing 26. Specifically, in some embodiments, the bulge loops 261 are provided at the ends of the flexible housing 26, and the bulge points 262 are provided between two of the bulge loops 261. Alternatively, the bulge loops 261 are provided at the ends and in the middle of the flexible housing 26, and the bulge points 262 are provided between two adjacent bulge loops 261. However, the alternating provision of the bulge loops 261 and the bulge points 262 is not limited to this, and the number of bulge loops 261 can be: four, five, six or more. The bulge points 262 are also capable of being provided at one or both ends of the flexible housing 26.

[0217]The alternating arrangement of the bulge loop 261 and the bulge point 262 provides greater deformation space, facilitating the assembly of the fan module 2. At the same time, the larger deformation space can improve the cushioning performance of the flexible housing 26.

[0218]The airflow passage inside the fan housing 20 is at least partially in the shape of a regular cylinder, and the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan assembly 24 ranges from 1.01 to 1.15. This ratio defines the gap between the maximum diameter of the fan assembly 24 and the fan housing 20. When the fan blade assembly 24 rotates, it generates centrifugal force on the airflow flowing through the fan blade assembly 24, and under the action of the centrifugal force, the airflow will move laterally and collide with the inner wall of the fan housing 20, generating turbulence. The turbulence will affects the flow field of the airflow in the fan housing 20, leading to a lower efficiency of the air outlet of the fan module 2. By limiting the range of the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 to between 1.01-1.15 limits the gap between the fan blade assembly 24 and the fan housing 20, so as to reduce the travelling of the transverse airflow under the action of the centrifugal force, and thus limit the velocity of the airflow when it contacts the inner edge surface of the fan housing 20 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the fan housing 20, reduce the chance of turbulence occurring, and improve the stability of the airflow flow field. At the same time, since the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 is limited to a range of 1.01-1.15, within this ratio, the spacing between the fan blade assembly 24 and the fan housing 20 is small. The small spacing between the fan blade assembly 24 and the fan housing 20 is able to have an excellent intercepting effect on the return airflow in the fan blade assembly 24, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blade assembly 24, and improving the air intake efficiency of the fan module 2. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module 2.

[0219]In some embodiments, the length ratio of the first end portion 2421 and the second end portion 2422 ranges from 1.4 to 1.9. The airflow through the fan flows from the first end portion 2421 to the second end portion 2422, and the first end portion 2421 gradually decreases in the direction facing the second end portion 2422, and this reduction process cooperates with the change in the size of the hub 241 to gradually reduce the space for the airflow to flow through. The flow is gradually pressurized to increase the initial velocity of the airflow. However, since the fan blade assembly 24 has a gap between the fan blade assembly 24 and the fan housing 20, when the pressure of the airflow entering the first end portion 2421 and flowing out of the second end portion 2422 is obviously too large, since it is not a completely closed space, the over-pressurized airflow will have a reflux phenomenon. And the refluxed airflow will impact on the intake airflow of the fan module 2 to form a cyclone, reducing the intake air efficiency of the fan module 2. The range of the ratio of the lengths of the first end portion 2421 and the second end portion 2422 is limited to 1.4-1.9, in which the airflow pressurization of the airflow flowing through the fan blade assembly 24 is regulated within the optimal range, minimizing the problem of backflow of the airflow due to excessive pressure. At the same time, within the range of the ratio, the first end portion 2421 is able to intercept and utilize the return airflow gradually overflowing from the edge of the fan blade 242 in the most effective manner, minimizing the chance of the return airflow flowing out of the fan housing 20. The combination of the two effects enables the airflow into the first end portion 2421 and the airflow out of the airflow end portion to converge to an optimal value of 1:1. The airflow efficiency of the fan blade assembly 24 is greatly improved.

[0220]It is to be noted that any of the embodiments in this embodiment are capable of being implemented independently, or by combination with one or more other embodiments. When implemented in combination, the combination should not be limited to the combination enumerated in this embodiment.

[0221]The third embodiment, as shown in FIG. 3a to FIG. 3f.

[0222]Referring to FIG. 3a and FIG. 3b, FIG. 3a is a schematic diagram of the overall structure of a fan module 2 of the third embodiment; FIG. 3b is a schematic diagram of the disassembled structure of the fan module 2 of the third embodiment.

[0223]As shown in FIG. 3a and FIG. 3b, a fan module 2 comprising: a fan housing 20, a motor assembly 23, and a fan blade assembly 24. The motor assembly 23 is provided in the fan housing 20; the fan blade assembly 24 is provided with a first balance ring 243 and a second balance ring 244, and the diameter of the first balance ring 243 is larger than the diameter of the second balance ring 244.

[0224]In the above embodiment, the motor assembly 23 and the fan blade assembly 24 of the fan module 2 are provided in the fan housing 20, and a first balance ring 243 and a second balance ring 244 are opened on the fan blade assembly 24, and by filling the corresponding positions of the first balance ring 243 and the second balance ring 244 with balance soil, the mass distribution of the fan blade assembly 24 is equalized, so that the rotational efficiency and stability of the fan blade assembly 24. At the same time, the two adjusting ring portions of the first balance ring 243 and the second balance ring 244 are able to increase the adjustable space of the fan blade assembly 24, achieving the purpose of equalizing a larger range of mass deviations formed by the fan blade assembly 24. The diameter of the first balance ring 243 is larger than the diameter of the second balance ring 244, and during rotation of the fan blade assembly 24, the torque of the first balance ring 243 is larger than the torque of the second balance ring 244, and the balance soil of the same mass produces a different regulating effect in the first balance ring 243 and the second balance ring 244, so that there is a hierarchical difference between the balancing effect of this structure on the fan blade assembly 24. As a result, this structure has a hierarchical difference in the equalizing effect on the fan blade assembly 24, and the combined use of the two can achieve more accurate mass equalization, thereby greatly enhancing the rotational efficiency and stability of the fan blade assembly 24.

[0225]In this embodiment, the fan housing 20 is constructed in a cylindrical shape, with a cylindrical interior opening into a cylindrical air cavity. However, the shape of the fan housing 20 is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the fan housing 20 is capable of being: triangular, quadrilateral, pentagonal, other polygonal, or other regular shapes.

[0226]In this embodiment, the fan housing 20 is provided with air chambers through its upper and lower surfaces, the air chambers being constructed in a cylindrical shape. However, the shape of the wind cavity is not limited to this, and depending on the specific application scenario. In some embodiments, the shape of the wind cavity is capable of being: star-shaped, heart-shaped, runway-shaped, or polygonal, and other shapes.

[0227]In some embodiments, the fan housing 20 is further provided with a horn or a diffuser with a tapered neck.

[0228]The motor assembly 23 is provided within the fan housing 20 via the connecting piece 21. In some embodiments, the connecting piece 21 comprises: a connecting ring 211 and a plurality of connecting plates 212, the plurality of connecting plates 212 being provided around the connecting ring 211, one end of each connecting plate 212 of the plurality of connecting plates 212 being connected to an inner surface of the fan housing 20, the other end of each connecting plate 212 being connected to the connecting ring 211, and two adjacent connecting plates 212 of the plurality of connecting plates 212 enclose to form the fan channel 202. The connecting ring 211 is fitted with the motor assembly 23 through an interference fit, snap-fit or provided with a connecting column 222 on the connecting ring 211, and the motor assembly 23 being sleeved onto the connecting column 222.

[0229]Referring to FIG. 3c and FIG. 3d. FIG. 3c is a schematic structural diagram of a first view of a fan housing 20 of the third embodiment; FIG. 3d is a schematic structural diagram of a second view of a fan housing 20 of the third embodiment.

[0230]As shown in FIG. 3c and FIG. 3d, the plurality of connecting plates 212 are provided in a manner that enables the connecting ring 211 to be cantileveredly disposed within the fan housing 20, and each two connecting plates 212 of the plurality of connecting plates 212 enclose to form the fan channel 202, enabling the airflow driven by the fan assembly to flow through the fan channel 202.

[0231]The manner of connecting piece 21 is not limited to this, and depending on the specific application scenario. In some embodiments, the connecting piece 21 can be a connecting body formed perpendicularly on the inner surface of the fan housing 20.

[0232]The motor assembly 23 is fixed to the connecting ring 211. However, the fixation of the motor assembly 23 is not limited to this, and depending on the specific application scenario, in some embodiments, the connecting ring 211 is provided with a connecting column 222, and the motor assembly 23 is able to be socketed on the connecting column 222. The connecting column 222 can be integrally formed with the connecting ring 211, or it can be fixed to the connecting ring 211 by means of snap-fit, riveting, screw connection, or gluing.

[0233]In some embodiments, the motor assembly 23 comprises: a coil 231 and a magnetic ring 232, the coil 231 being socketed to the connecting column 222 and having an interference fit with the connecting column 222, and the magnetic ring 232 being provided within the fan blade assembly 24. The rotating shaft 133 is connected to the fan blade assembly 24 at one end and to the connecting column 222 at the other end.

[0234]In some embodiments, the motor assembly 23 comprises: a coil 231, a magnetic ring 232, and a motor shell 234, the coil 231 being socketed to the connecting column 222 and having an interference fit with the connecting column 222, and the magnetic ring 232 being provided within the motor shell 234 and socketed to the coil 231. The rotating shaft 133 is connected to the fan blade assembly 24 at one end, and is connected to the connecting column 222 at the other end, and has an interference fit with the motor shell 234.

[0235]In some embodiments, the motor assembly 23 is a conventional motor that is secured to the connecting ring 211 by means of snap-fit, screw-fixing, riveting, glued connection, welding, or the like.

[0236]In some embodiments, the motor assembly 23 is capable of being connected to the fan housing 20 via a structure within the fan housing 20, such as a connecting desk on an inner wall of the fan housing 20, the connecting desk being connected to the motor assembly 23. Alternatively, a connecting rod extends within the fan housing 20 and the motor assembly 23 is secured to the connecting rod. Alternatively, two opposing clamping portions extend inwardly from the inner surface of the fan housing 20 to clamp and secure the motor assembly 23.

[0237]In some embodiments, a buttress plate extends within the fan housing 20 towards the motor assembly 23 to secure the motor assembly 23 by clamping, or a support structure extends laterally within the fan housing 20 for securing the motor assembly 23.

[0238]The motor assembly 23 is connected to the fan blade assembly 24 by a rotating shaft 133. The rotating shaft 133 is connected to the motor assembly 23 and the connecting column 222 at one end, and is connected to the fan blade assembly 24 at the other end. However, the connection of the rotating shaft 133 is not limited to this, and depending on the specific application scenario. In some embodiments, the end of the rotating shaft 133 connected to the motor assembly 23 is also connected to the connecting column 222. In some embodiments, when the magnetic ring 232 is fixed in the fan blade assembly 24, one end of the rotating shaft 133 is connected to the connecting ring 211 or the connecting column 222 only, and the other end is connected to the fan blade assembly 24.

[0239]In this embodiment, the ratio of the inner diameter of the fan housing 20 to the largest diameter of the fan blade assembly 24 ranges from 1.01-1.15. The ratio of the inner diameter of the fan housing 20 to the largest diameter of the fan blade assembly 24 ranges to limit the clearance between the fan housing 20 and the fan blade assembly 24 at the largest point of the diameter of the fan blade assembly 24. When the fan blade assembly 24 rotates, it generates centrifugal force on the airflow flowing through the fan blade assembly 24. And under the action of the centrifugal force, the airflow will move laterally and collide with the inner wall of the fan housing 20, generating turbulence. The turbulence will affect the flow field of the airflow in the fan housing 20, and further leading to a lower efficiency of the air outlet of the fan module 2. Limiting the range of the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 to between 1.01-1.15 limits the gap between the fan blade assembly 24 and the fan housing 20, so as to reduce the travelling of the transverse airflow under the action of the centrifugal force, and thus limit the velocity of the airflow when it contacts the inner edge surface of the fan housing 20 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the fan housing 20, reduce the chance of turbulence occurring, and improve the stability of the airflow flow field. At the same time, since the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 is limited to a range of 1.01-1.15, within this ratio, the spacing between the fan blade assembly 24 and the fan housing 20 is small. The small spacing between the fan blade assembly 24 and the fan housing 20 is able to have an excellent intercepting effect on the return airflow in the fan blade assembly 24, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blade assembly 24, and improving the air intake efficiency of the fan module 2. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module 2.

[0240]Referring to FIG. 3e and FIG. 3f. FIG. 3e is a schematic structural diagram of a first view of the fan blades 242 of the third embodiment; FIG. 3f is a schematic structural diagram of a second view of the fan blades 242 of the third embodiment.

[0241]As shown in FIG. 3e and FIG. 3f, both the first balance ring 243 and the second balance ring 244 are comprised of a plurality of balance slots 245 surrounded by a plurality of balance slots 245. The independent balance slots 245 serve as the smallest balancing unit, which facilitates quantification of the balancing adjustments and facilitates leveling by the user. At the same time, also due to the fact that the balance slots 245 of the first balance ring 243 and the second balance ring 244 have different moments, the balance slots 245 of the first balance ring 243 have a larger moment and can be used for coarse adjustment, and the balance slots 245 of the second balance ring 244 have a smaller moment and can be used to achieve micro-adjustment, and the combination of both allows for both coarse and micro-adjustment, and to achieve a more accurate leveling.

[0242]The number of balance slots 245 of the first balance ring 243 can be (not limited to): two, three, four, five, ten, eighteen, twenty-six or more. The number of balance slots 245 of the first balance ring 243 can be arbitrarily set based on actual needs.

[0243]The number of balance slots 245 of the second balance ring 244 can be (not limited to): two, three, four, five, eleven, eighteen, twenty-six or more. The number of balance slots 245 of the second balance ring 244 can be arbitrarily set based on actual needs.

[0244]The fan blade assembly 24 includes: a hub 241 and a plurality of fan blades 242, the plurality of fan blades 242 extending at an angle around the surface of the hub 241, the hub 241 being connected to a rotating shaft 133.

[0245]In this embodiment, the number of fan blades 242 is nine. However, the number of fan blades 242 is not limited, and depending on the specific application scenario, in some implementations, the number of fan blades 242 is capable of being (not limited to): two, three, four, five, six, seven, eight, ten, eleven, or more.

[0246]The hub 241 comprises: a top surface 2411, a bottom surface 2413, and a side surface 2412, the bottom surface 2413 having a cross-sectional area greater than the cross-sectional area of the top surface 2411 and a smooth transition between the top surface 2411 and the side surface 2412, a first balance ring 243 being provided on the side surface 2412 and connected to the bottom surface 2413, and a second balance ring 244 being provided on the side surface 2412.

[0247]That is, the hub 241 in this embodiment is constructed in the shape of a bullet with a flat head. This shape of the hub 241 enables the airflow flowing through the fan blades 242 to flow along the curved surface formed by the smooth transition between the top surface 2411 and the side surface 2412 to form an attachment wall effect, which has a good guiding effect on the airflow, improves the efficiency of the airflow flowing through the fan blade assembly 24, and thus improves the airflow efficiency of the fan module 2.

[0248]However, the shape of the hub 241 is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the hub 241 is capable of being (not limited to): hemispherical, conical, daisy-shaped, cylindrical, and other shapes.

[0249]The top surface 2411 of the hub 241 is a circular surface. However, the shape of the top surface 2411 is not limited to this, and depending on the specific application scenario, in some embodiments, the shape of the top surface 2411 of the hub 241 is also capable of being: conical, polygonal, oval, or other shapes.

[0250]An opening is provided in the bottom surface 2413 of the hub 241, the opening being connected to a holding cavity inside the hub 241, and a connecting shaft sleeve is provided inside the holding cavity. In some embodiments, a plurality of stiffeners are provided around the connecting shaft sleeve, the plurality of stiffeners are provided around the connecting shaft sleeve, one end of the stiffeners is connected to the connecting shaft sleeve, and the other end of the stiffeners is connected to the inner surface of the hub 241.

[0251]Each of the plurality of fan blades 242 includes a first end portion 2421, and a second end portion 2422 opposite the first end portion 2421, the length of the first end portion 2421 being greater than the length of the second end portion 2422, the first balance ring 243 being disposed on a side adjacent the second end portion 2422, and the second balance ring 244 being disposed on a side adjacent the first end portion 2421.

[0252]The first end portion 2421 is located adjacent to the top surface 2411 of the hub 241 and the second end portion 2422 is located adjacent to the bottom surface 2413 of the hub 241. In each fan blade 242, the first end portion 2421 is used to propel airflow into the fan assembly 24 as the fan assembly 24 rotates, and a longer length of the first end portion 2421 helps in driving the airflow more effectively. The second end portion 2422 is located at the end of the airflow flow direction, and The reduction in the length of the second end portion 2422 helps to reduce the space through which the airflow passes, compressing the airflow, increasing the initial kinetic energy of the airflow flow, and thus enhancing the air output efficiency of the fan module 2.

[0253]In some embodiments, the length ratio of the first end portion 2421 and the second end portion 2422 ranges from 1.4 to 1.9. The airflow passing through the fan flows from the first end portion 2421 to the second end portion 2422, The direction of the first end portion 2421 gradually decreases towards the second end portion 2422. This reduction process cooperates with the change in the size of the hub 241 to gradually reduce the space for the airflow to pass through. Compresses the airflow□thereby increasing the initial speed of the airflow. However, since the fan blade assembly 24 has a gap between the fan blade assembly 24 and the fan housing 20, when the pressure of the airflow entering the first end portion 2421 and flowing out of the second end portion 2422 becomes excessively high, since it is not a completely closed space, the over-pressurized airflow will have a reflux phenomenon, and the refluxed airflow will impact on the intake airflow of the fan module 2 to form a cyclone, reducing the intake air efficiency of the fan module 2. The range of the length ratio of the first end portion 2421 to the second end portion 2422 is limited to 1.4-1.9, the airflow pressurization of the airflow passing through the fan blade assembly 24 is regulated within the optimal range, minimizing the problem of backflow of the airflow due to excessive pressure. At the same time, within the range of the ratio, the first end portion 2421 is able to intercept and utilize the return airflow gradually overflowing from the edge of the fan blade 242 in the most effective manner, minimizing the chance of the return airflow flowing out of the fan housing 20. The combination of the two effects enables the airflow into the first end portion 2421 and the airflow out of the airflow end portion to converge to an optimal value of 1:1. The airflow efficiency of the fan blade assembly 24 is greatly improved.

[0254]Each fan blade 242 is provided with a blade edge 2423, and the thickness of each fan blade 242 gradually increases in the direction from the first end portion 2421 to the blade edge 2423, and the thickness of each fan blade 242 gradually decreases in the direction from the blade edge 2423 to the second end portion 2422. The thickness of the different parts of the fan blades 242 changes, so that each fan blade 242 is constructed as a structure with thinner ends and thicker middle, and this structure enhances the cutting ability of the ends of the fan blades 242 on the airflow, and reduces the air resistance at the ends of the fan blades 242. The increase in thickness of the middle part can enhance the physical strength of the fan blades 242, and at the same time, the increase in thickness of the fan blades 242 reduces the space between two neighbouring fan blades 242, and acts as a pressurizing effect on the airflow passing through.

[0255]Along the circumferential direction of the hub 241, the length of the second baffle 2432 is greater than the length of the first baffle 2431. The change in the length of the spacer makes the leveling capacity of the first balance ring 243, instead of the superposition of the unit leveling capacity, appear as a numerical span, and this span change is coupled with the fine-tuning capacity of the second balance ring 244, and the fine-tuning capacity, as a supplement to the numerical span, can make it possible to reach the leveling purpose quickly.

[0256]In some embodiments, the second baffle 2432 is connected to the second end portion 2422 of the fan blades 242, a connection that makes full use of the space of the fan blade assembly 24, extends the length of the fan blades 242, and enhances the efficiency of the airflow of the fan blade assembly 24.

[0257]The fan housing 20 is provided with a flexible housing 26, and the flexible housing 26 is alternately provided with a bulge loop 261 and a bulge point 262. To improve the drop resistance of the fan module 2, and at the same time, while also reducing noise and vibration when the fan module 2 is in use.

[0258]It is to be noted that any of the embodiments in this embodiment are capable of being implemented independently, or by combination with one or more other embodiments. When implemented in combination, the combination should not be limited to the combination enumerated in this embodiment.

[0259]The fourth embodiment, as shown in FIG. 4a to FIG. 4e.

[0260]Referring to FIG. 4a and FIG. 4b, FIG. 4a is a schematic diagram of the overall structure of a fan module 2 of the fourth embodiment; FIG. 4b is a schematic diagram of the disassembled structure of the fan module 2 of the fourth embodiment.

[0261]As shown in FIG. 4a and FIG. 4b, a fan module comprising: a fan housing 20, a connecting piece 21, a fan assembly 25, and a buffering component 27, the fan assembly 25 comprising a motor assembly 23 and a fan blade assembly 24. Wherein the connecting piece 21 is disposed in the fan housing 20; the motor assembly 23 is disposed in the fan housing 20, and one end of the motor assembly 23 is connected to the connecting piece 21; the fan blade assembly 24 is disposed in the fan housing 20, and the fan blade assembly 24 is disposed on the motor assembly 23; a buffer component 27 is disposed between the fan blade assembly 24 and the connecting piece 21; and the fan assembly 25 is disposed on the connecting piece 21.

[0262]In this embodiment, the fan housing 20 is constructed in a cylindrical shape, and a cylindrical interior is opened with a cylindrical air chamber 201. However, the shape of the fan housing 20 is not limited to this, and depending on the specific application scenarios. In some embodiments, the shape of the fan housing 20 is capable of being: triangular, quadrilateral, pentagonal, other polygonal, or other regular shapes.

[0263]Referring to FIG. 4c, FIG. 4c is a schematic structural diagram of a top view perspective of a fan housing 20 of the fourth embodiment.

[0264]As shown in FIG. 4c, in this embodiment, the fan housing 20 is provided with an air chamber 201 running through its upper and lower surfaces, the air chamber 201 being constructed in a cylindrical shape. However, the shape of the air chamber 201 is not limited to this, and depending on the specific application scenario. In some embodiments, the shape of the air chamber 201 can be: star-shaped, heart-shaped, runway-shaped or polygonal and other shapes.

[0265]Referring to FIG. 4d, FIG. 4d is a schematic structural diagram of a elevation view perspective of a fan housing 20 of the fourth embodiment.

[0266]As shown in FIG. 4d, the connecting piece 21 comprises: a connecting ring 211, a connecting column 222, and a plurality of connecting plates 212. The multiple connecting plates 212 are arranged around the connecting ring 211, one end of each connecting plate 212 of the plurality of connecting plates 212 is connected to an inner surface of the fan housing 20, and the other end of each connecting plate 212 is coupled to the connecting ring 211.

[0267]The connecting column 222 is provided on the side of the connecting ring 211 facing the fan blade assembly 24. The connecting column 222 comprises: a first column 2221 and a second column 2222, the bottom surface of the a first column 2221 is provided on the connecting ring 211, the top surface of the first column 2221 is connected to the second column 2222, and the coil 231 is socketed on the second column 2222.

[0268]The structure of the connecting column 222 enables the first column 2221 to act as a limit, and to act as a stop for the fan assembly 25 socketed on the second column 2222, improving the assembly efficiency of the coil 231.

[0269]In some embodiments, the connecting column 222 is also capable of being constructed as a prism or circular column.

[0270]The provision of the connecting column 222 can enable the motor assembly 23 and the fan blade assembly 24 to be set suspended inside the fan housing 20, so that the rotation of the motor assembly 23 and the fan blade assembly 24 inside the fan housing 20 is more smooth.

[0271]The connecting ring 211 is provided with the plurality of connecting plates 212 in such a way that the connecting ring 211 can be provided suspended inside the fan housing 20. At the same time, the connecting plates 212 and the gaps between the connecting plates 212 can serve as air ducts for the airflow flow inside the fan housing 20 to restrain the airflow inside the fan housing 20.

[0272]The end portion of each connecting plate 212 facing the fan blade assembly 24 is curved and extended in the direction of the fan blade assembly 24 to form an air guide plate 213, with the curvature direction of the air guide plate 213 being opposite to the direction of rotation of the fan blade assembly 24.

[0273]Each connecting plate 212 facing the end of the fan blade assembly 24 is curved and extended to form an air guide plate 213, the curvature direction of the air guide plate 213 is opposite to the rotation direction of the fan assembly 25. When the fan blade assembly 24 rotates, it will drive the airflow to rotate in the same direction, at this time, the curvature direction of the air guide plate 213 is opposite to the direction of the rotation of the airflow, the airflow is rotated with the curved part of the air guide plate 213 in contact with the collision. Due to the opposite direction, the angle of contact between the airflow and the curved part of the air guide plate 213 is greater than 90 degrees, and the airflow is contacted by the air guide plate 213 at a larger angle, which can reduce the loss of kinetic energy of the airflow contacting the air guide plate 213. And during the contact process at a larger angle, the air guide plate 213 has an obvious guiding effect on the airflow, with a small loss of energy, which can greatly increase the efficiency of the airflow.

[0274]In this embodiment, the number of connecting plates 212 is seven. However, the number of connecting plates 212 is not limited to this, and depending on the specific application scenario, in some implementations, the number of connecting plates 212 is capable of being two, three, four, five, six, eight or more.

[0275]In this embodiment, the number of air guide plates 213 corresponding to the number of connecting plates 212 is also seven. However, the number of air guide plates 213 is not limited to this, and may vary depending on the specific application scenario, in some implementations, the number of air guide plates 213 can be two, three, four, five, six, eight or more.

[0276]In some embodiments, the connecting plate 212 and the air guide plate 213 are of a split structure, i.e., the connecting plate 212 and the air guide plate 213 are provided independently of each other, and the connected ends of the connecting plate 212 and the air guide plate 213 are capable of being docked together or separated from each other.

[0277]The air guide plate 213 is provided between the fan blade assembly 24 and the fan housing 20, and the air guide plate 213 is connected to an inner surface of the fan housing 20, with a gap between the air guide plate 213 and the fan blade assembly 24.

[0278]The air guide plate 213 is provided between the fan blade assembly 24 and the fan housing 20, and the air guide plate 213 has a gap between the air guide plate 213 and the fan blade assembly 24. The gap between the air guide plate 213 and the fan blade assembly 24 is such that after the airflow comes into contact with the air guide plate 213, part of the airflow passes to the air outlet along the guidance of the air guide plate 213, and the other part of the airflow flows to the next air guide plate 213 through the gap flow between the air guide plate 213 and the fan blade assembly 24. The gap between the air guide plate 213 and the fan blade assembly 24 provides a channel for the air pressure balance between the air guide plate 213 and the fan blade assembly 24, avoiding the problem that the air pressure on both sides of the air guide plate 213 is inconsistent due to the fact that the air guide plate 213 is completely closed, thus affecting the air output efficiency of the fan module.

[0279]Referring to FIG. 4e, FIG. 4e is a sectional view of the fan module 2 of the fourth embodiment.

[0280]As shown in FIG. 4e, the motor assembly 23 comprises: a coil 231, a magnetic ring 232 and a rotating shaft 233, the fan assembly 25 is connected to the connecting piece 21 by a rotating shaft 233, the connecting piece 21 is provided with a connecting column 222 on the side facing the fan blade assembly 24, the coil 231 is set on the connecting column 222, the magnetic ring 232 is set on the coil 231, the fan blade assembly 24 is set on the magnetic ring 232, the rotating shaft 233 is connected to the fan blade assembly 24 at one end, the other end of the rotating shaft 233 is inserted into the connecting column 222, and the buffering member 27 is provided between the connecting column 222 and the fan blade assembly 24.

[0281]In some embodiments, when the connecting column 222 comprises: a first column 2221 and a second column 2222, the coil 231 is socketed to the second column 2222 and one end of the coil 231 is interlocked with the first column 2221. The first column 2221 can define the position of the coil 231 and making it convenient for the assembly and positioning of the coil 231.

[0282]The magnetic ring 232 is provided inside the hub 241 of the fan blade assembly 24, and the magnetic ring 232 and the hub 241 are connected by means of an interference fit, while the inner ring of the magnetic ring 232 is socketed on the coil 231, and is connected to the coil 231 by magnetic coupling. The connection of the magnetic ring 232 with the fan blade assembly 24 and the coil 231 can make the connection of the entire motor assembly 23 and the fan blade assembly 24 more compact, and can also save the housing structure of the motor assembly 23, making the motor assembly 23 more lightweight. The fan blade assembly 24 is set on the magnetic ring 232, so that the contact area between the fan blade assembly 24 and the motor assembly 23 is larger, and the torque when rotating is smaller, so that the fan blade assembly 24 can be more stable when rotating, and the speed of rotation is higher, and the air output of the fan module is larger.

[0283]In some embodiments, the motor assembly 23 further comprises: a metal ring 239, the metal ring 239 being disposed on the magnetic ring 232, and the fan blade assembly 24 being disposed on the metal ring 239. The metal ring 239 is provided to protect the magnetic ring 232 from damage during assembly of the magnetic ring 232.

[0284]The buffering component 27 is set on the rotating shaft 233, the connecting column 222 is provided with a connecting hole 223, the two ends of the connecting hole 223 are provided with a first shaft sleeve 2261 and a second shaft sleeve 2262, and the rotating shaft 233 is inserted into and threaded out of the first shaft sleeve 2261 and the second shaft sleeve 2262. The first shaft sleeve 2261 and the second shaft sleeve 2262 can make the linear stability of the rotation of the rotary shaft 233 better, which in turn makes the rotation of the fan blade assembly 24 more stable and the efficiency of the air outlet higher.

[0285]The end of the rotating shaft 233 that penetrates the second shaft sleeve 2262 is provided with a securing slot, and the securing slot is provided with a ring circlip 235, and the ring circlip 235 is provided with an opening to enable the ring circlip 235 to be disassembled. The diameter of the ring circlip 235 is larger than the diameter of the inner ring of the second shaft sleeve 2262, so that the ring circlip 235 prevents the rotating shaft 233 from falling out of the second shaft sleeve 2262 and the first shaft sleeve 2261.

[0286]In some embodiments, a seal 240 is provided between the ring circlip 235 and the second shaft sleeve 2262.

[0287]The buffering component 27 is constructed in the shape of a tower, and the buffering component 27 is socketed on the rotating shaft 233. The buffering component 27 being socketed on the rotating shaft 233 prevents the buffering component 27 from being displaced during the rotation of the fan blade assembly 24 and impeding the normal rotation of the fan blade assembly 24.

[0288]The buffering component 27 is constructed in the shape of a tower, and the elastic force of the tower buffering component 27 grows linearly after being subjected to pressure, so that it can effectively cushion and reset the displacement generated during the rotation of the fan blade assembly 24, so that the rotation of the fan blade assembly 24 is more stable. The linear growth of the elastic force enables the fan blade assembly 24 to smoothly increase the buffering force when it is squeezed by a large external force, so as to provide a better buffering effect.

[0289]In some embodiments, the shape of the buffering component 27 is not limited to a tower shape, and depending on the specific application scenario, the shape of the buffering component 27 is capable of being (not limited to): a ring, a straight cylinder, or a curved, spherical shape, or the like.

[0290]In some embodiments, the positional relationship of the buffering component 27 is not limited to being socketed on the rotating shaft 233, but is capable of being provided on the fan blade assembly 24, or on the connecting column 222, depending on the specific application scenario.

[0291]One end of the buffering component 27 is fixedly connected to the connecting column 222, and the other end of the buffering component 27 is overlapped with or separated from the fan blade assembly 24. The buffering component 27 is connected to the connecting column 222, which avoids the buffering component 27 coming into contact with the fan blade assembly 24 during the normal working state of the fan blade assembly 24 and interfering with the normal rotation of the fan blade assembly 24, and improves the stability of the rotation of the fan blade assembly 24 and the efficiency of the fan module. The other end of the buffering component 27 is overlapped or separated from the fan blade assembly 24. Specifically, when the fan blade assembly 24 is subjected to force to move in the direction of the connecting column 222, the fan blade assembly 24 is coupled with the buffering component 27; when the fan blade assembly 24 rotates normally, it is separated from the buffering component 27 to ensure that the fan blade assembly 24 is in an optimal rotational state. In this embodiment, the buffering component 27 can be fitted on the rotating shaft 233 or separated from the rotating shaft 233.

[0292]The material used to make the buffering component 27 in this embodiment can be (not limited to): a metal spring or an elastomer made of rubber.

[0293]In this embodiment, a connecting piece 21 is provided in the fan housing 20 of the fan module for connecting the motor assembly 23, and the fan blade assembly 24 is connected to the motor assembly 23 and a buffering component 27 is provided between the fan blade assembly 24 and the connecting piece 21. The provision of the buffering component 27 is able to limit and buffer the displacement phenomenon of the fan blade assembly 24, avoiding that the fan blade assembly 24 comes into contact with other components in the fan housing 20 in a narrow space and thus causing wear and tear of the fan blades 242 or a reduction in rotation efficiency. The rotation efficiency of the fan module is improved and the service life of the fan module is extended.

[0294]In this embodiment, a ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 ranges from 1.01 to 1.15. The ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 defines the gap between the fan housing 20 and the maximum diameter of the fan blade assembly 24. When the fan blade assembly 24 rotates, it generates centrifugal force on the airflow passing through the fan blade assembly 24. And under the action of the centrifugal force, the airflow will move laterally and collide with the inner wall of the fan housing 20, generating turbulence. The turbulence will affect the flow field of the airflow in the fan housing 20, leading to a lower efficiency of the air outlet of the fan module 2. Limiting the range of the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 to between 1.01-1.15 limits the gap between the fan blade assembly 24 and the fan housing 20, so as to reduce the travelling of the transverse airflow under the action of the centrifugal force, and thus limit the velocity of the airflow when it contacts the inner edge surface of the fan housing 20 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the fan housing 20, reduce the chance of turbulence occurring, and improve the stability of the airflow flow field. At the same time, since the ratio of the inner diameter of the fan housing 20 to the maximum diameter of the fan blade assembly 24 is limited to a range of 1.01-1.15. Within this ratio, the spacing between the fan blade assembly 24 and the fan housing 20 is small, which is able to have an excellent intercepting effect on the return airflow in the fan blade assembly 24, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blade assembly 24, and improving the air intake efficiency of the fan module 2. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module 2.

[0295]It is to be noted that any of the embodiments in this embodiment are capable of being implemented independently, or by combination with one or more other embodiments. When implemented in combination, the combination should not be limited to the combination enumerated in this embodiment.

[0296]The fifth embodiment.

[0297]An air blowing device comprising the fan module of the first embodiment or the second embodiment or the third embodiment or the fourth embodiment as a core module component for assembling the air blowing device. The fan module is used for airflow within the air blowing device.

[0298]It is to be noted that the air blowing device in this embodiment include (without limitation): a blade-less fan, a desktop fan, a floor fan, a spherical fan, a neck fan, a hand-held fan, an industrial fan, an air conditioner, a hair dryer, and the like, which are required to boost the air for circulation. The fan module 1 in the first embodiment or the second embodiment or the third embodiment or the fourth embodiment is then assembled inside the housing of the above-described product.

[0299]The sixth embodiment, as shown in FIG. 5a to FIG. 5t.

[0300]The sixth embodiment of the present application provides a portable fan to solve the problem that the prior art adopts a mechanical switch, and the user is unable to adjust the wind speed of any gear according to the need resulting in a poor user experience.

[0301]The sixth embodiment of the present application provides a portable fan based on a high-speed three-phase motor, as shown in FIG. 5a, comprising: a control module 32, a drive module 33, and a high-speed three-phase motor 34, wherein the high-speed three-phase motor 34 operates at a voltage of from 2 to 18 volts, the high-speed three-phase motor 34 operates at a current of from 0.1 to 10 amperes, and/or the high-speed three-phase motor 34 operates at a rated power of from 0.5 to 100 watts; the control module 32 controls the rated operating speed of the high-speed three-phase motor 34 via the drive module 33 in accordance with the operating voltage, the operating current, and/or the rated operating power to reduce the high-rpm noise of the high-speed three-phase motor 34 and to control the wind speed to be in a preset wind speed interval.

[0302]Among other things, the present technical solution achieves low-voltage driving of a high-speed three-phase motor to work to meet the specific needs of a portable fan through the cooperative work of the control module 32 and the drive module 33. In this case, it is necessary to adjust the number of slots and pole pairs to accommodate low-voltage operation, select high-performance core materials to reduce magnetic losses, and improve working efficiency under low voltage. An efficient inverter is used to convert low-voltage DC power into three-phase AC power, ensuring the stability of the power supply and preventing voltage fluctuations from affecting motor performance.

[0303]Therein, the range of the operating voltage is from 2 to 18 volts, the range of the operating current is from 0.1 to 10 amps, and the range of the rated operating power is from 0.5 to 100 watts, and the high-speed three-phase motor 34 is designed to provide a more efficient rotational speed and power output compared to an existing portable fan motor at a low voltage, which is suitable for the needs of portable devices. The control module 32 accurately controls the high-speed three-phase motor 34 based on the real-time monitored operating voltage, operating current, and rated operating power, and by adjusting the power supply parameters of the high-speed three-phase motor 34, the control module 32 is able to effectively reduce noise generated when the motor operates at a high rotational speed. The control module 32 can also adjust the wind speed of the fan so that it is within a preset wind speed interval, which ensures the comfort of use and the stability of the device compared to a single-phase low-speed motor. The drive module 33 connects the control module 32 and the high-speed three-phase motor 34, converting the instructions of the control module 32 into actual motor drive signals, and the drive module 33 adopts highly efficient inverter technology to convert low-voltage direct current into alternating current suitable for the high-speed three-phase motor 34, ensuring efficient operation of the motor, and under different operating conditions, the drive module 33 adjusts the motor according to the instructions of the control module 32 to adjust the rotational speed and output power.

[0304]The technical effect of this embodiment is that: by combining the control module, the drive module and the high-speed three-phase motor, this technical solution provides a highly efficient, low-noise, adjustable wind speed portable fan solution. Through low-voltage drive technology and precise control strategies, it not only improves the portability and user comfort of the fan but also effectively enhances the overall performance and energy efficiency of the device. This design is suitable for portable fan application scenarios that require high performance and low noise, and fills the gap in the market for high-speed three-phase motors to be used in small portable devices.

[0305]Specific applications of the sixth embodiment include, but are not limited to, the following embodiments:

[0306]As an embodiment, when the operating voltage of the high-speed three-phase motor 34 is 6 to 8.4 volts, the operating current of the high-speed three-phase motor 34 is 0.12 to 1 amp, and/or the rated operating power of the high-speed three-phase motor 34 is 0.8 to 9 watts, the control module 32 controls the rated operation of the high-speed three-phase motor 34 through the drive module 33 based on the operating voltage, the operating current, and/or the rated operating power speed of 6000 to 15000 RPM/MIN.

[0307]Among them, the high-speed three-phase motor 34 is driven by a voltage range of 6 to 8.4 volts, which is suitable for supplying power from two batteries in series, with an operating current range of 0.12 to 1 amps to ensure stable operation at different speeds, and a power range of 0.8 to 9 watts to meet the power requirements of the portable fan. The control module 32 monitors the working voltage, current and power of the motor in real time and adjusts them according to these parameters, and the control module 32 is able to accurately control the speed of the motor, with an adjustable range of 6,000-15,000 RPM. The drive module 33 converts the DC power of 6 to 8.4 volts into a three-phase alternating current, and drives the high-speed three-phase motor 34 through the inverter technology. The batteries are connected in series using two batteries to provide a stable voltage. The fan has 4 pairs of poles, 12 slots, 5 blades and 6 guide blades/impellers.

[0308]As an embodiment, when the operating voltage of the high-speed three-phase motor 34 is 5.9 to 8.4 volts, the operating current of the high-speed three-phase motor 34 is 0.5 to 6 amps, and/or the rated operating power of the high-speed three-phase motor 34 is 5 to 50 watts, the control module 32 controls the rated operation of the high-speed three-phase motor 34 through the drive module 33 based on the operating voltage, the operating current, and/or the rated operating power speed of 20,000 to 80,000 RPM/MIN.

[0309]Among them, the high-speed three-phase motor 34 is driven by a voltage range of 5.9 to 8.4 volts, which can be 5.9V, 6.0V, 6.5V, 7.2V, . . . , 8.4V, and it is suitable for supplying power from two batteries in series, with an operating current range of 0.5 to 6 amps to ensure stable operation at different speeds, and a power range of 5 to 50 watts to meet the power requirements of the portable fan. The control module 32 monitors the working voltage, current and power of the motor in real time and adjusts them according to these parameters, and the control module 32 is able to accurately control the speed of the motor, with an adjustable range of 20,000-80,000 RPM. The drive module 33 converts the DC power of 5.9 to 8.4 volts into a three-phase alternating current, and drives the high-speed three-phase motor 34 through the inverter technology. The batteries are connected in series using two batteries to provide a stable voltage. The fan has 1 pairs of poles, 6 slots, 13 blades and 6 guide blades/impellers.

[0310]As an embodiment, when the operating voltage of the high-speed three-phase motor 34 is 2 to 5.8 volts, the operating current of the high-speed three-phase motor 34 is 1 to 8 amps, and/or the rated operating power of the high-speed three-phase motor 34 is 1 to 8 watts, the control module 32 controls the rated operation of the high-speed three-phase motor 34 through the drive module 33 based on the operating voltage, the operating current, and/or the rated operating power speed of 15,000 to 41,000 RPM/MIN.

[0311]Among them, the high-speed three-phase motor 34 is driven by a voltage range of 2 to 5.8 volts, which can be 2V, 2.1V, 2.5V, 3.7V, . . . , 4.3V, 5.8V, and it is suitable for supplying power from two batteries in series, with an operating current range of 0.25 to 1.8 amps to ensure stable operation at different speeds, and a power range of 1 to 8 watts to meet the power requirements of the portable fan. The control module 32 monitors the working voltage, current and power of the motor in real time and adjusts them according to these parameters, and the control module 32 is able to accurately control the speed of the motor, with an adjustable range of 15,000-41,000 RPM. The drive module 33 converts the DC power of 2 to 5.8 volts into a three-phase alternating current, and drives the high-speed three-phase motor 34 through the inverter technology. The batteries are connected in series using two batteries to provide a stable voltage. The fan has 4 pairs of poles, 9 slots, 9 blades and 7 guide blades/impellers.

[0312]As an embodiment, when the operating voltage of the high-speed three-phase motor 34 is 8.5 to 12.6 volts, the operating current of the high-speed three-phase motor 34 is 0.5 to 5 amps, and/or the rated operating power of the high-speed three-phase motor 34 is 6 to 60 watts, the control module 32 controls the rated operation of the high-speed three-phase motor 34 through the drive module 33 based on the operating voltage, the operating current, and/or the rated operating power speed of 25,000 to 85,000 RPM/MIN.

[0313]Among them, the high-speed three-phase motor 34 is driven by a voltage range of 8.5 to 12.6 volts, which can be 8.5V, 9.0V, 10.5V, 12.0V, . . . , 12.6V, and it is suitable for supplying power from three batteries in series, with an operating current range of 0.5 to 5 amps to ensure stable operation at different speeds, and a power range of 6 to 60 watts to meet the power requirements of the portable fan. The control module 32 monitors the working voltage, current and power of the motor in real time and adjusts them according to these parameters, and the control module 32 is able to accurately control the speed of the motor, with an adjustable range of 25,000-85,000 RPM. The drive module 33 converts the DC power of 8.5 to 12.6 volts into a three-phase alternating current, and drives the high-speed three-phase motor 34 through the inverter technology. The batteries are connected in series using three batteries to provide a stable voltage. The fan has 1 pairs of poles, 6 slots, 13 blades and 6 guide blades/impellers.

[0314]As an embodiment, when the operating voltage of the high-speed three-phase motor 34 is 12 to 18 volts, the operating current of the high-speed three-phase motor 34 is 0.1 to 1 amps, and/or the rated operating power of the high-speed three-phase motor 34 is 2 to 16 watts, the control module 32 controls the rated operation of the high-speed three-phase motor 34 through the drive module 33 based on the operating voltage, the operating current, and/or the rated operating power speed of 2,000 to 6,000 RPM/MIN.

[0315]Among them, the high-speed three-phase motor 34 is driven by a voltage range of 12 to 18 volts, which can be 12V, 9.0V, 12.5V, 14.0V, 16.8V, . . . , 18V, and it is suitable for supplying power from four batteries in series, with an operating current range of 0.1 to 1 amps to ensure stable operation at different speeds, and a power range of 2 to 16 watts to meet the power requirements of the portable fan. The control module 32 monitors the working voltage, current and power of the motor in real time and adjusts them according to these parameters, and the control module 32 is able to accurately control the speed of the motor, with an adjustable range of 2,000-6,000 RPM. The drive module 33 converts the DC power of 12 to 16.8 volts into a three-phase alternating current, and drives the high-speed three-phase motor 34 through the inverter technology. The batteries are connected in series using four batteries to provide a stable voltage. The fan has 4 pairs of poles, 6 slots, 9 blades and 10 guide blades/impellers.

[0316]As an embodiment, this embodiment provides a portable fan, as shown in FIG. 5b, comprising: an input module 31, a control module 32, a drive module 33, and a high-speed three-phase motor 34, connected in sequence, the drive module 33 comprising a first bridge arm, a second bridge arm, and a third bridge arm, on either side of the midpoint of each of these arms, including an upper bridge arm switch tube and a lower bridge arm switch tube, each bridge arm is connected to a phase coil of the high-speed three-phase motor 34 at the midpoint; the input module 31 outputs a wind speed adjustment control signal according to a user command, the control module 32 generates a PWM control signal according to the wind speed adjustment control signal, and controls the switch tubes of each bridge arm to adjust the rotational speed of the high-speed three-phase motor 34 by means of the PWM control signal.

[0317]Among other things, the input module 31 also outputs a switching signal according to the user instruction, and the control module 32 generates a switching control signal according to the switching signal, and controls the switch tube of each bridge arm by the switching control signal in order to drive the high-speed three-phase motor 34 to start operation or stop operation.

[0318]When the user's instruction is to turn on the fan, the input module 31 outputs the switch signal according to the user's instruction, and when the user's instruction is to adjust the fan speed, the input module 31 outputs the wind speed adjusting control signal according to the user's instruction, and the user may input the control instruction in a variety of ways according to the type of the input module 31. For example, the input module 31 may input the instruction by touch, voice, or other input methods. When the input module 31 is a touch control module 311, the input module 31 generates a switch signal when it detects a touch action, and the input module 31 generates a wind speed adjustment signal when it detects a sliding action. When the input module 31 is the voice control module 312, the input module 31 captures the voice signal of the user and converts it into the switch signal and the wind speed adjustment control signal. When the input module 31 is the networking module 36, the input module 31 receives the remote control signal or the wind speed adjustment parameters set by the user. The input module 31 may also be a multifunctional input module, through which the input module 31 achieves a variety of functions such as timing control, light control, head shaking control, spray control, cooling control, and so on. The timer function means that the user sets the timer switch time through the touch control module 311, or sets the timer function remotely through the voice control module 312 and the networking module 36. Light control means that the user adjusts the light switch state, brightness and colour through the touch control module 311, or controls the light remotely through the voice control module 312 and the networking module 36. Head-swinging function means that the user sets the head-swinging angle and speed of the fan through the touch control module 311, or remotely controls the head-swinging function through the voice control module 312 and the networking module 36. Spraying function means that the user turns on or adjusts the amount of spraying through the touch control module 311, or controls the spraying function remotely through the voice control module 312 and the networking module 36. The cooling function means that the user adjusts the cooling intensity of the fan through the touch control module 311, or remotely controls the cooling function through the voice control module 312 and the networking module 36. Multiple function control is achieved through the input module, allowing the user to use and adjust the fan more flexibly to meet the needs of different use scenarios.

[0319]The input module 31 and the control module 32 are connected to each other by wired or wireless means, and the input module is provided on the portable fan housing or on other electronic devices.

[0320]The input module 31 and the control module 32 are connected to each other by wired means, for example, through an I2C connection line, an SPI connection line, an UART connection line, a GPIO interface, an USB interface, a CAN bus, an I2S interface, and an ADC interface. I2C connection line (Inter-Integrated Circuit) is a serial communication protocol commonly used to connect low-speed peripheral devices (such as touch modules) to the motherboard, using two wires (SDA and SCL) for data transmission and clock synchronization. SPI connection line (Serial Peripheral Interface) is a high-speed synchronous serial communication protocol, using four wires (MISO, MOSI, SCK, and SS) for data transmission. UART connection line (Universal Asynchronous Receiver-Transmitter) is an asynchronous serial communication protocol that uses two wires (Tx and Rx) for data transmission. GPIO Interface (General-Purpose Input/Output) is a general-purpose digital signal input/output interface that can be configured in either input or output mode. USB interface (Universal Serial Bus) is a general-purpose, high-speed serial communications interface that supports plug-and-play and hot-plugging. CAN bus (Controller Area Network) is an industrial automation serial communications protocol with high reliability and real-time performance. The I2S interface (Integrated Interchip Sound) is a serial bus standard for audio data transfer. ADC interface (Analog-to-Digital Converter) is an interface that converts analogue signals to digital signals. Signal transmission between the input module 31 and the control module 32 is achieved through wireless communication technologies, such as Wi-Fi, Bluetooth, Zigbee, and so on. The input module 31 is directly integrated into the housing of the portable fan, which is suitable for occasions where the user wishes to operate the fan directly on the fan, such as adjusting the wind speed via a touch screen or switching the fan on and off by pressing a button. The input module 31 can also be separated from the portable fan and installed on other electronic devices (e.g., smartphones, tablets, smartwatches, etc.), and wirelessly connected to the control module of the fan, making the control of the portable fan more flexible and convenient, and allowing the user to remotely control the fan through an existing electronic device. Among them, the wireless module can be Bluetooth module, Wi-Fi module, infrared module, 433 MHz wireless module, but also for the following wireless modules: Zigbee module, Z-Wave module, LoRa (Long Range) module, NFC (Near Field Communication), 2.4 GHz dedicated wireless modules, 5G etc. The control module 32 receives signals from the input module 31 and performs signal processing, generates switch control signals based on the switch signals for controlling the start and stop of the high-speed three-phase motor 34, and calculates control signals for adjusting the portable fan based on the wind speed adjustment signals, which include, but are not limited to, PWM (Pulse Width Modulation), PPM (Pulse Position Modulation), data protocols, or other custom protocols. Among them, PWM signals are a commonly used control method to regulate the speed of the motor by changing the duty cycle of the signal (i.e., the ratio of the time at high level to the period). PPM signals convey information by changing the position of the pulse within a cycle. The data protocol can be a standard communication protocol (e.g., I2C, SPI, UART) or a custom communication protocol for transmitting more complex control commands. The custom protocols are designed to design specific control signal formats and transmission methods based on specific application requirements. If the input module 31 is a voice module 312, the control module 32 generates switching control signals and PWM control signals based on the switching signals and wind speed adjustment control signals. If the input module 31 is a networking module 36, the control module 32 generates a corresponding control signal according to the remote control signal. The drive module 33 comprises three bridge arms, each of which includes an upper bridge arm switch tube and a lower bridge arm switch tube connected to the phase coils of the high-speed three-phase motor 34. The control module 32 controls the switch tubes of each bridge arm via switching control signals to start or stop the high-speed three-phase motor 34. The switch tubes of each bridge arm are controlled via PWM control signals to regulate the speed of the high-speed three-phase motor 34. Controlling the starting and stopping of the motor as well as the rotational speed can be done using a six-step phase switching method for motor control, where only two MOS tubes conduct at each moment, creating an efficient current path to drive the motor. By controlling three bridge arms (each with two MOS tubes), six phase change states are realized to drive the motor, each phase change state corresponds to a pair of on MOS tubes and the rest of the MOS tubes remain off. The high-speed three-phase motor 34 receives signals from the driver module 33, starts to operate and provides the corresponding wind speed.

[0321]The technical effect of the sixth embodiment is that: through the switch signal and wind speed adjustment control signal output from the input module, the control module is able to generate the switch control signal and PWM control signal, so that the user can adjust the operation state and wind speed of the fan according to the need, and realize flexible wind speed adjustment; compared with the traditional mechanical switching method, this technical solution enables the user to select the appropriate wind speed according to the specific needs, which enhances the convenience and comfort and improves the user experience.

[0322]As an embodiment, as shown in FIG. 5c, when the input module 31 is the touch control module 311, the touch control module 311 outputs a switch signal when it detects a touch action, and the control module 32 generates a switch control signal according to the switch signal; the touch control module 311 outputs a wind speed adjustment signal when it detects a sliding action, and the control module 32 calculates the duty cycle of the PWM signal according to the wind speed adjustment signal and generates a PWM control signal based on the the duty cycle of the PWM signal.

[0323]The touch control module 311 detects the touch and slide actions of the user, when the user touches the touch control module 311, the touch control module 311 detects the touch action and generates a switch signal, and when the user slides on the touch control module 311, the touch control module 311 detects the slide parameter and generates a wind speed adjustment signal. The control module 32 receives and processes the switch signal and generates a switch control signal for controlling the start and stop of the high-speed three-phase motor 34. The control module 32 receives and processes the wind speed adjustment signal, and calculates the desired duty cycle of the PWM signal according to the wind speed adjustment signal.

[0324]The control module 32 calculates the PWM signal duty cycle according to the different sliding parameters using different calculation methods, the sliding parameters can include the following: sliding distance: the distance of the user's sliding finger in the touch region; sliding speed: the speed of the user's sliding finger; sliding direction: the direction of the user's sliding finger (e.g., up and down, left and right); sliding position: the start position and end position of the user's sliding finger in the touch area.

[0325]In this case, the specific steps for calculating the duty cycle with the sliding distance as the main parameter are as follows:

[0326]When the user starts sliding on the touch area, the starting position is recorded. When the user ends sliding on the touch area, the end position is recorded. The distance between the starting position and the ending position is used as the sliding distance. For example, if the starting position is P1 and the ends position is P2, the sliding distance D can be expressed as D=P2−P1, define the maximum distance Dmax that the user may slide on the touch area, compare the actual sliding distance D with the maximum sliding distance Dmax, calculate the sliding distance as a percentage R, and make sure that R is between 0 and 1. Set the minimum and maximum values of the PWM signal duty cycle. For example, the minimum value is 0% and the maximum value is 100%. According to the sliding distance duty ratio, calculate the corresponding PWM signal duty ratio according to the correspondence, and output a PWM control signal according to the PWM signal duty ratio send the generated PWM control signal to the drive module 33 to adjust the rotational speed of the high-speed three-phase motor 34 to achieve a change in the wind speed.

[0327]In this case, the specific steps for calculating the duty cycle with sliding time as the main parameter are as follows:

[0328]When the user slides on the touch area, the touch control module 311 detects the sliding action and records the start and end times of the sliding. The touch control module 311 transmits the sliding time to the control module 32, which calculates the normalized sliding time based on the sliding time and generates a corresponding PWM duty cycle.

[0329]The control module 32 sends the PWM signal to the driver module 33, which controls the rotational speed of the high-speed three-phase motor 34 by adjusting the switching frequency and duty cycle of the switch tube.

[0330]In this case, the specific steps for calculating the duty cycle with the click position as the main parameter are as follows:

[0331]When the user clicks a position on the touch control module 311, the touch control module 311 detects the coordinates of the click position (e.g., X, Y coordinates), and the touch control module 311 generates a wind speed adjustment signal by using the coordinates of the click position as a click parameter. According to the click position, the control module 32 calculates the desired duty cycle of the PWM signal. For example, the touch area is divided into a plurality of zones, each corresponding to a different wind speed gear. Assuming that the touch area of the touch control module 311 is divided into five equal regions, clicking on each region corresponds to a wind speed gear: region 1 (leftmost) is a low wind speed gear, region 2 (middle) is a medium wind speed gear, and region 5 (rightmost) is a high wind speed gear, and when the user clicks on the rightmost side of the touch region (region 5), the touch module 311 detects the click position coordinates and generates the corresponding wind speed adjustment signal. The control module 32 receives the wind speed adjustment signal and calculates the duty cycle of the PWM signal required for the corresponding high wind speed gear according to the click position (area 5). The control module 32 generates the PWM control signal and sends it to the driver module 33, which adjusts the rotational speed of the high-speed three-phase motor 34 to the high wind speed gear by controlling the conduction time of the upper bridge arm switch tube and the lower bridge arm switch tube.

[0332]As an embodiment, the touch control module 311 may use a touch-slide adjustment chip that contains a plurality of contacts, and when the user operates the fan via the touch screen, the touch-slide adjustment chip detects a touch action via these contacts. If pressure from the touch action is detected, the touch control module 311 generates a switch signal. The touch-sliding adjustment chip transmits the switch signal to the control module 32, which receives the switch signal and generates a switch control signal for controlling the switch tubes in the drive module 33 to start or stop the high-speed three-phase motor 34, i.e., to turn the fan on or off. In addition to detecting the touch action, the touch-sliding adjustment chip is also capable of detecting the user's sliding parameters on the touch screen, including the sliding gesture, the sliding distance, the sliding speed, the number of slides, and the sliding time. These parameters are transmitted to the control module 32 through the touch module 311, and the control module 32 generates a corresponding PWM control signal according to a preset logic to regulate the wind speed of the portable fan. The control module 32 generates a corresponding PWM control signal according to the sliding parameters, and the PWM control signal is used to control the switch tubes in the drive module 33 to regulate the rotational speed of the high-speed three-phase motor 34 to adjustment of the wind speed.

[0333]Among other things, the touch-sliding adjustment chip has a plurality of contacts, and when the user performs a touch-sliding operation on the contacts, the chip detects the touch action and the sliding parameters (such as the sliding distance and the sliding speed). The sliding parameters detected by the chip include the distance and speed at which the user slides on the touch screen, and these parameters reflect the degree to which the user wishes to adjust the wind speed. According to the detected sliding parameters, the touch sliding adjustment chip generates the wind speed adjustment control signal, the control module receives the wind speed adjustment control signal, according to the size of the signal to calculate the duty cycle of the corresponding PWM signal, the higher the duty cycle, the higher the speed of the motor; the lower the duty cycle, the lower the speed of the motor, the control module will be generated by the PWM signal sent to the drive module, the drive module to control the speed of the motor. The control module sends the generated PWM signal to the driver module, which controls the speed of the motor. By adjusting the duty cycle of the PWM signal, it can achieve precise control of the motor speed, and thus regulate the air speed of the fan.

[0334]As an example, as shown in FIG. 5d, U5 is a touch control chip, pins PA0 to PA4 of the touch control chip U5 can be connected to the control module 32 by the connection method described above, and the touch control chip U5 includes at least contacts K2, contacts K3, contacts K4, contacts K5, contacts K6, and contacts K7, each of which can detect a touch action, and the different contacts can be paired to detect a sliding gesture, sliding parameters such as sliding distance, sliding speed, sliding times, and sliding times.

[0335]The technical effect of this implementation is: compared with the traditional portable fan only a mechanical switch to control the gear in a single way, through the touch module to achieve a more diversified control mode, the user can not only through a simple touch switch fan, but also through the sliding operation of the flexible adjustment of the wind speed, the application of the touch sliding adjustment chip makes the operation of the fan is more convenient, intuitive, the user does not need to repeatedly press the mechanical switch, just through the touch and slide can easily control the fan switch and wind speed, improve the user's operational efficiency and user experience. Users do not need to repeatedly press the mechanical switch, just through the touch and slide can easily control the fan switch and wind speed, improving the user's operating efficiency and experience. The control module generates accurate PWM control signals according to the detected sliding parameters, which can realize precise control of the fan's wind speed, so that users can flexibly adjust the wind speed according to their needs, and obtain a more comfortable using experience.

[0336]As a second embodiment of the touch control module 311, the touch control module 311 may be a touch screen chip, including a single channel touch, a multi-channel touch, a touch screen, and so on, and the touch sliding screen chip includes a switch region and a sliding region, and the touch sliding screen chip generates a switching touch signal through the switch region, as well as generates a corresponding wind speed adjusting control signal when a sliding parameter is detected through the sliding region.

[0337]Among other things, the touch control module 311 of the portable fan adopts a touch screen chip that contains a switch region and a sliding region, and when the user touches the switch region, the touch screen chip detects the touch action and generates the switch signal, and when the user carries out a sliding operation in the sliding region, the touch screen chip detects the sliding parameter and generates a corresponding wind speed adjustment control signal. The touch module 311 sends the generated switch signal and the wind speed adjustment control signal to the control module 32, and the control module 32 receives the switch signal and generates the switch control signal, through which it controls the switch tubes of each bridge arm so that the motor starts or stops operation. After receiving the wind speed adjustment control signal, the control module 32 generates a PWM control signal by which it controls at least one switch tube of each bridge arm to adjust the rotational speed of the high-speed three-phase motor 34 to achieve wind speed adjustment.

[0338]As an example, as shown in FIG. 5e, pins 5 to 9 of the touch screen connector P2 are connected to the touch screen, and pins 12 to 15 of the touch screen connector P2 can be connected to the control module 32 by the above mentioned connection. As shown in FIG. 5f, a control interface is displayed on the screen of the mobile terminal, and the control interface includes an on/off button, a speed control button, a timer off button, an air purifying button, an ambient light button, a fan-abnormality reminder, and different functions are realized by clicking the buttons, herein only as an example and not as a limitation of the present application.

[0339]The technical effect of this embodiment is: through the touch screen chip, users can easily control the fan's on/off switch and adjust the wind speed. The operation is simple and intuitive, which meets the user's needs in various aspects. The touch screen chip through the detection of the switch area and the sliding area, which can achieve flexible switch and wind speed adjustment. Users can accurately control the fan's wind speed according to the need to provide a more comfortable use experience. The use of the touch screen enhances the sense of technology and modernity of the portable fan, improves the user experience and makes the product more competitive in the market.

[0340]As a third embodiment of the touch control module 311, the touch control module 311 includes a plurality of single-contact touch chips connected in parallel. The touch control module 311 generates a switching touch signal when a touch action is detected by any one of the contacts, as well as generates a corresponding wind speed adjusting control signal when multiple touch points detect sliding parameters.

[0341]Among other things, the touch control module 311 of the portable fan includes a plurality of single-contact touch chips or a plurality of contact touches integrated into one chip, which generates a switching signal when the user touches any one of the single-contact touch chips; and the plurality of single-contact touch chips detects the sliding parameter when the user slides on the touch screen and generates the corresponding wind-speed adjustment control signal. The touch module 311 sends the generated switch touch signals and wind speed adjustment control signals to the control module 32, which receives the switch touch signals and generates a conduction level signal, through which it controls the switch tubes of each bridge arm so that the motor starts or stops running. After receiving the wind speed adjustment control signal, the control module 32 generates a PWM control signal, through which it controls at least one switch tube of each bridge arm to adjust the rotational speed of the high-speed three-phase motor 34 to achieve wind speed adjustment.

[0342]As an example, as shown in FIG. 5g, U3 is a single-contact touch chip, and the single-contact touch chip U3 is connected to the control module 32 through pin 1 via resistor R10, and the pin 3 of the single-contact touch chip U3 is connected to a contact K1 via resistor R11, so that the above function can be realized by connecting multiple single-contact touch chips in parallel.

[0343]The technical effect of this implementation is: through a plurality of parallel single-contact touch chips, the user can easily achieve the switch control and wind speed adjustment of the fan, the operation is simple and intuitive, and meets the user's multifaceted needs. The touch slide adjustment chip can achieve flexible wind speed adjustment through the detection of multiple single contacts, and the user can accurately control the wind speed of the fan according to the needs, providing a more comfortable using experience. The use of touch screen enhances the technological and modern feel of the portable fan, improves the user experience and makes the product more competitive in the market.

[0344]As an embodiment, as shown in FIG. 5h, when the input module 31 is the voice control module 312, the voice control module 312 captures the voice signal of the user and converts the voice signal into a switch signal and a wind speed adjustment control signal. The control module 32 generates a switch control signal and a PWM control signal based on the switch signal and the wind speed adjustment control signal, respectively.

[0345]Among other things, the user sends voice commands, such as “turn on the fan”, “turn off the fan”, or “turn up the air speed”, through the voice control module 312. The microphone of the voice control module 312 captures the voice signal of the user. The voice control module 312 transmits the captured voice signals to a voice recognition unit, which converts the voice signals into corresponding switch signals and wind speed adjustment control signals, and the voice control module 312 sends the switch signals and wind speed adjustment control signals to the control module 32, which generates corresponding control signals according to the switch signals and wind speed adjustment control signals: if the instruction is “turn on the fan”, “turn off the fan”, the instruction corresponds to the switch signal, and the control module 32 generates the switch control signal; if the instruction is related to the wind speed adjustment, “adjust the wind speed”, the instruction corresponds to the wind speed adjustment control signal, and the control module 32 generates the corresponding control signal according to the switch signal and the wind speed adjustment control signal. If the instruction involves wind speed adjustment “adjust wind speed up”, the instruction corresponds to a wind speed adjustment control signal, and the control module 32 generates a PWM control signal. Through the switching control signal, the control module 32 controls the switch tube in the drive module 33 to drive the high-speed three-phase motor 34 to start or stop. The control module 32 adjusts the duty cycle of the PWM signal based on the wind speed control signal and generates the corresponding PWM control signal. The control module 32 sends the PWM control signal to the driver module 33, the control module 32 controls the rotational speed of the high-speed three-phase motor 34 by adjusting the switching frequency and the duty cycle of the switch tubes of the upper bridge arm or the lower bridge arm.

[0346]The technical effect of the present embodiment is that the user does not need to manually operate the mechanical switch or the touch panel, and the portable fan can be conveniently controlled by voice commands, which makes the operation more convenient. The operation is more convenient, and the motor speed is controlled by PWM signals, ensuring smooth and precise wind speed adjustment, and providing a better user experience.

[0347]For the voice control module 312, as an embodiment, as shown in FIG. 5i, the voice control module 312 comprises a voice acquisition module 321, a voice recognition module 322, and a voice output module 323, the voice recognition module 322 connects the voice acquisition module 321, the voice output module 323, and the control module 32, respectively; the voice acquisition module 321 captures the user's voice signal, the voice recognition module 322 converts the voice signals into switch signals and wind speed adjustment control signals and sends them to the control module 32, and the voice recognition module 322 also controls the voice output module 323 to output or not to output the execution results according to the feedback results of the control module 32.

[0348]Among other things, the voice acquisition module 321 is responsible for capturing the user's voice signals, usually comprising a microphone, for converting the user's voice input into the form of electrical signals. The voice recognition module 322 converts the captured voice signals into switching signals and wind speed adjustment control signals, and uses speech recognition algorithms and techniques to process the speech signals into recognizable signal instructions, which can be parsed and executed by the subsequent control module 32. Specifically, the speech recognition module 322 pre-processes the captured speech signals, including signal amplification, filtering, and denoising, to ensure the accuracy and stability of subsequent processing. The pre-processed speech signal is converted into digitized feature vectors, this step can be done using techniques such as MFCC (Mel Frequency Cepstral Coefficients) to extract features from the speech signal. Train a voice recognition model based on a large amount of labeled speech data. Based on a large amount of labeled speech data, a speech recognition model is trained. Commonly used techniques include Hidden Markov Models (HMM), Deep Learning Models (e.g. Recurrent Neural Networks RNN, Long Short-Term Memory Networks LSTM), etc., where the feature vectors are fed into the speech recognition model for recognition and decoding, and the model maps the sequence of feature vectors to a sequence of instructions, and then output the decoded instructions. The voice type can be to indicate the fan on or off, e.g.: turn on the fan corresponds to 0x01, turn off the fan corresponds to 0x02. The voice type can be to indicate the speed adjustment of the fan, e.g.: increase the wind speed corresponds to 0x03, decrease the wind speed corresponds to 0x04. The voice type can be a specific wind speed level, and the wind speed level can be set directly. For example, low speed corresponds to 0x10, medium speed corresponds to 0x11, and high speed corresponds to 0x12. In addition, other words may be used to replace the above mentioned switching on the fan, switching off the fan, increasing the wind speed, and decreasing the wind speed. The signal output from the voice module 312 may be a single-byte or multi-byte packet, depending on the complexity of the instructions and the design of the system. For example, the single-byte signal may be 0x01 (indicating switching on the fan), and the multi-byte signal may be 0x01 0x02 (indicating switching on the fan and setting to the second level of air speed).

[0349]As an example, the user says “turn on the fan”, the voice control module 312 recognizes the command and generates the signal 0x01, which the voice control module 312 sends to the control module 32, and the user says “turn up the air speed”, the voice control module 312 recognizes the command and generates the signal 0x01, which the voice control module 312 sends to the control module 32. The user says “turn up the wind speed”, the voice control module 312 recognizes the instruction and generates the signal 0x03, the voice control module 312 sends the signal 0x03 to the control module 32. The user says “adjust the wind speed to medium speed”, the voice control module 312 recognizes the instruction and generates the signal 0x11, the voice control module 312 sends the signal 0x11 to the control module 32.

[0350]As an example, as shown in FIG. 5j and FIG. 5k, the voice acquisition module 321 includes a microphone MIC, a resistor R23, a resistor R24, a capacitor C27, and a capacitor C28, a first end of the microphone MIC connecting a second end of the resistor R24 to a second end of the capacitor R27, respectively, and a second end of the microphone MIC connecting a second end of the resistor R23 to a second end of the capacitor R28, respectively. The voice recognition module 322 includes a voice recognition chip U1, the pin 1 of the voice recognition chip U1 is connected to one end of the capacitor C21, the pin 2 of the voice recognition chip U1 is connected to one end of the capacitor C20 and one end of the resistor R20, respectively, the other end of the capacitor C20 is co-located to the ground with the anode of the voltage regulator D1, the other end of the resistor R20 is co-located to the cathode of the voltage regulator D1 at a high level, and the pin 3 of the voice recognition chip U1 is connected to the second end of the resistor R24 and the second end of the capacitor R27, pin 3 of the voice recognition chip U1 is connected to one end of capacitor C24, pin 4 of the voice recognition chip U1 is connected to one end of capacitor C25, pin 5 of the voice recognition chip U1 is connected to the ground in common with the other end of capacitor C24 and the other end of capacitor C25, pin 24 of the voice recognition chip U1 is connected to the same level as the end of capacitor C22, the end of capacitor C23, and the other end of capacitor C21, the voice recognition chip U1's pin 23 is connected to the other end of capacitor C22, the voice recognition chip U1's pin 22 is connected to the other end of capacitor C23, and the voice recognition chip U1's pins 22, 21, and 20 are connected to A1, A2, and A3 of the voice acquisition module 321, respectively.

[0351]The working process of this circuit is as follows: the microphone MIC captures the user's voice input, the capacitor C27 and capacitor C28 convert the user's voice input into an electrical signal shape and output the electrical signal to the voice recognition chip U1, which converts the captured voice signal into a switching signal and a wind speed adjustment control signal.

[0352]The technical effect of this embodiment is that the user interactivity and friendliness of the device is improved by voice input and output, enabling the user to easily control the start-stop and speed adjustment of the fan by voice commands without direct contact with the device, and the voice control enables the fan to have more functions, such as intelligent operation and customized voice settings according to the user's voice commands, which enhances the intelligent degree of the device and user experience of the device.

[0353]For the voice output module 323, as an embodiment, as shown in FIG. 5l, the voice output module 323 includes an amplifier module 331 and a speaker 332, and the amplifier module 331 is connected to the voice recognition module 322 and the speaker 332, respectively.

[0354]The amplifier module 331 is mainly responsible for amplifying the speech signal, amplifying the low level speech signal output from the voice recognition module 322 to a high level signal sufficient to drive the speaker 332, and the speaker 332 receives the amplified speech signal from the amplifier module 331 and converts it to sound output.

[0355]As an example, as shown in FIG. 5m, the voice output module 323 includes an amplifier chip U2 and a speaker S1, and the B1 and B2 terminals of the amplifier chip U2 are connected to the pins 16 and 17 of the voice recognition chip U1, respectively, and the amplifier chip U2 is responsible for amplifying the voice signals and then outputting voice from the speaker S1.

[0356]The technical effect of this embodiment is that, by means of the amplifier module, it can ensure that the voice signal is not lost or distorted during transmission, and can drive the speaker at a sufficient volume so that the user can clearly hear the result of the voice output.

[0357]As an embodiment, as shown in FIG. 5n, the portable fan further comprises a networking module 36, the networking module 36 being connected to a voice control module 312 and a control module 32, respectively; the voice control module 312 uploads the voice signals to a cloud server 37 via the networking module 36. The cloud server 37 converts the voice signals into switching signals and wind speed adjusting control signals and outputs them to the networking module 36. The networking module 36 sends the switch signals and the wind speed adjustment control signals to the control module 32.

[0358]In particular, the voice recognition service and remote control function of the cloud server 37 can be utilized through networking to further enhance the recognition accuracy and flexibility of the system. The specific steps are as follows: the user's voice signal is captured using a microphone, the voice signal is transmitted to the networking module 36 through analogue-to-digital conversion, the networking module 36 uploads the captured voice signal to the cloud server 37 for voice recognition service, and the cloud server 37 converts the voice signal into a switching signal and a wind speed adjusting control signal, and returns it to the networking module 36. The networking module 36 sends the switching signal and the wind speed adjustment control signal returned from the cloud to the control module 32, which generates the corresponding control signal. The control module 32 provides other switching instructions based on voice commands, such as “turn on the fan” or “turn off the fan”, or other switching commands can be customized to increase ease of use and interest, such as possible customized switching commands:

[0359]For example, possible custom switch commands: “turn on the fan”, “turn off the fan”, “start blowing the fan”, “I'm hot, turn on the fan”, etc., can be customized according to the user's habits and preferences to continue to expand these commands and improve the interactive experience. The control module 32 calculates the duty cycle of the corresponding PWM signal and generates a PWM control signal according to the voice command, such as “adjust the wind speed up” or “adjust the wind speed down”. The driver module 33 drives the motor according to the received switch control signal and PWM control signal to control the fan on/off and wind speed adjustment.

[0360]The technical effect of this embodiment is that: as the voice recognition is performed on a cloud server, the cloud server has stronger computing power and more efficient voice recognition algorithms, which can more accurately recognize the user's voice commands and improve the recognition accuracy; the voice recognition task is completed in the cloud, which reduces the computational burden of the portable fan device, allowing the device to adopt a lower-cost hardware configuration, and at the same time prolongs the battery life; addition of the networking module enables the portable fan to link with other smart devices to achieve remote control and data analysis, further enhancing the user experience and the intelligence of the device.

[0361]As an embodiment, as shown in FIG. 5o, the portable fan further comprises a rpm measurement module 35, the rpm measurement module 35 is connected to a high-speed three-phase motor 34 and a control module 32 respectively; the rpm measurement module 35 is used to measure the actual rotational speed of the high-speed three-phase motor 34 and send it to the control module 32, the control module 32 obtains the amount of change in rotational speed according to the actual rotational speed and the target rotational speed, adjusts the duty cycle of the PWM signal according to the amount of change in rotational speed, and outputs the adjusted PWM control signal to the driver module 33.

[0362]The incremental PID control algorithm is specifically used in this embodiment to generate the PWM signal to improve the smoothness of the PWM signal and the accuracy of the motor speed regulation, which can be achieved by the following steps: the incremental PID control algorithm adjusts the amount of control by calculating the errors of the current and the previous times, so as to achieve the accurate control of the system, which includes the proportional (P), the integral (I) and the differential (D)Three parts: Example control (P): proportional adjustment of current error; Integral control (I): cumulative adjustment of past errors; Differential control (D): adjustment of the rate of change of current error. Initialize the PWM module and timer, set the parameters required by the PID control algorithm (like the proportional coefficient Kp, the integral coefficient Ki, the differential coefficient Kd), and acquire the sensor data, and the rpm measurement module 35. The rpm measurement module 35 can be a magnetic encoder or a Hall sensor, real-time measurement of the motor's rotational speed, and feedback the rpm to the control module 32. The control module 32 based on the set target rotational speed and the actually measured rotational speed. And calculates the current error, calculates an incremental control amount based on the current error, and further adjusts the PWM duty cycle, finally outputs a PWM signal to control the rotational speed of the high-speed three-phase motor 34.

[0363]The technical effect of this embodiment is that: the PID control algorithm adjusts the control amount according to the error, can accurately track the set value, so that the motor speed is rapidly stabilized near the target value, the PID control algorithm responds quickly to the error change, can adjust the PWM signal in time when the load changes, to ensure the flexibility and accuracy of the wind speed adjustment, and over the PID control algorithm to accurately adjust the PWM control signal. The PID control algorithm can precisely adjust the PWM control signal, so that the wind speed can be smoothly transitioned.

[0364]As an embodiment, the control module 32 detects a change in the operating voltage and maintains the operating voltage within a constant voltage range by boosting or bucking the voltage.

[0365]When the control module 32 detects a change in the operating voltage, in order to maintain the stability of the motor operation, the control module 32 may regulate the operating voltage to a preset constant voltage range by means of a boost or buck circuit. The control module 32 continuously monitors the input voltage and triggers the voltage regulation mechanism when it detects that the voltage deviates from the preset range (e.g., 6-8.4 V). The control module 32 controls a boost or buck converter. For example, when the input voltage falls below the set range, the control module 32 enables a boost circuit to raise the voltage to within the set range. Conversely, when the input voltage is higher than the set range, the control module 32 enables the buck circuit to reduce the voltage to within the set range. Through the feedback loop, the control module 32 is able to adjust the degree of boosting or bucking in real time to ensure that the output voltage is constant within the preset range.

[0366]As an embodiment, the control module 32 detects a change in the operating current and maintains the operating current within a constant current range by adjusting the PWM control signal.

[0367]When the control module 32 detects a change in the operating current, it keeps the current within a constant range by adjusting the PWM (pulse width modulation) control signal. The control module 32 continuously monitors the operating current of the motor. When the current is detected to deviate from a preset range (e.g., 0.12-1 A), the current adjustment mechanism is triggered. The control module 32 changes the input power of the motor by adjusting the duty cycle of the PWM signal. For example, when the current is detected to be below the preset range, the PWM duty cycle is increased to increase the input power and increase the current. Conversely, when the current is higher than the preset range, the PWM duty cycle is decreased, the input power is decreased, and the current is decreased. Through feedback from the current sensor, the control module 32 adjusts the duty cycle of the PWM signal in real time to ensure that the operating current remains within a constant range.

[0368]As an embodiment, when the control module 32 detects a change in the operating power, it maintains the operating power stable by adjusting the operating voltage or the operating current.

[0369]The control module 32 continuously monitors the operating power of the motor (P=V×I) and triggers the power adjustment mechanism when the power is detected to deviate from the set value. By controlling the boost or buck converter, the input voltage is adjusted to restore the power to the set value. For example, when the power is lower than the set value, increase the input voltage to increase the power; when the power is higher than the set value, decrease the input voltage to decrease the power. By adjusting the PWM signal, the current is changed to restore the power to the set value. For example, when the power is lower than the set value, increase the PWM duty cycle, raise the current, and increase the power; when the power is higher than the set value, decrease the PWM duty cycle, lower the current, and decrease the power. Through the control signal feedback, the control module 32 adjusts the voltage or current in real time to ensure that the operating power remains within a constant range.

[0370]In the above embodiment, the control module monitors the motor's voltage, current, and power in real-time. Through corresponding adjustments, it ensures stable operation under various conditions, improving efficiency and performance. This guarantees the portable fan's reliability and stability in different environments.

[0371]For the driving module 33, as shown in FIGS. 5p and 5q, the first bridge arm includes a first upper bridge arm switch tube 341 and a second lower bridge arm switch tube 342. The second bridge arm includes a third upper bridge arm switch tube 343 and a fourth lower bridge arm switch tube 344. The third bridge arm includes a fifth upper bridge arm switch tube 345 and a sixth lower bridge arm switch tube 346. A midpoint A of the first bridge arm is connected to a first coil 351, a midpoint B of the second bridge arm is connected to a second coil 352, and a midpoint C of the third bridge arm is connected to a third coil 353. The first upper bridge arm switch tube 341, the first coil 351, the second coil 352, and the fourth lower bridge arm switch tube 344 form a first circuit; The first upper bridge arm switch tube 341, the first coil 351, the third coil 353, and the sixth lower bridge arm switch tube 346 form a second circuit; The third upper bridge arm switch tube 343, the second coil 352, the third coil 353, and the sixth lower bridge arm switch tube 346 form a third circuit; The third upper bridge arm switch tube 343, the second coil 352, the first coil 351, and the second lower bridge arm switch tube 342 form a fourth circuit; The fifth upper bridge arm switch tube 345, the third coil 353, the first coil 351, and the second lower bridge arm switch tube 342 form a fifth circuit;

[0372]The fifth upper bridge arm switch tube 345, the third coil 353, the second coil 352, and the fourth lower bridge arm switch tube 344 form a sixth circuit.

[0373]The first bridge arm includes the first upper bridge arm switch tube 341 and the second lower bridge arm switch tube 342, with the midpoint connected to the first coil 351. The second bridge arm includes the third upper bridge arm switch tube 343 and the fourth lower bridge arm switch tube 344, with the midpoint connected to the second coil 352. The third bridge arm includes the fifth upper bridge arm switch tube 345 and the sixth lower bridge arm switch tube 346, with the midpoint connected to the third coil 353, forming six circuits. Each circuit consists of switch tubes and coils. The control module 32 controls each circuit to be switched on one by one through switch control signals to drive the motor to start running. The control module 32 generates the switch control signals based on received switch signals, which are used to control each circuit one by one. The switch tubes in each bridge arm are switched on one by one according to control of the switch control signals, so as to drive phase coils of each motor through current. As the switch tubes in each bridge arm are gradually switched on, current flows through corresponding phase coils, and the motors begin to rotate. Gradually switching on the six circuits means starting each motor phase in the fan in sequence, thereby starting the entire fan system. Specifically, the switch tubes of each circuit in the six circuits are sequentially switched on to make each circuit switched on. The first circuit to the sixth circuit are sequentially switched on, the fan rotates forward, the sixth circuit to the first circuit are sequentially conductive, and the fan rotates in reverse.

[0374]The control module 32 receives the wind speed regulation control signal and generates a PWM control signal, which for each circuit is used to regulate its corresponding switching tube and hence the speed of the motor.

[0375]As an embodiment, the control module also controls the conduction time of the switching tubes in each circuit by means of a PWM control signal to regulate the rotational speed of the motor.

[0376]The control module receives wind speed adjustment control signals from the touch control module or the voice control module that contain user instructions for adjusting the fan speed. The control module 32 generates a corresponding pulse width modulation (PWM) control signal based on the wind speed adjustment control signal, and the duty cycle (i.e., the ratio of the duration of the high level to the entire cycle) of the PWM signal directly corresponds to the desired fan speed. The control module 32 applies the generated PWM control signals to the two switching tubes in each loop as follows: The switching tubes in each loop perform switching operations according to the duty cycle of the PWM signal. At a high level, the switching tube conducts; at a low level, the switching tube turns off. By adjusting the duty cycle of the PWM signal, the conduction time of the switching tubes in each circuit is controlled, thus regulating the current flowing through the motor coil. The speed of the motor is directly proportional to the strength of the current in the motor coil. By adjusting the conduction time of the switching tubes in each circuit, the control module 32 is able to accurately control the current of the high-speed three-phase motor 34, thereby regulating the speed of the high-speed three-phase motor 34. By gradually increasing or decreasing the duty cycle of the PWM signal, the rotational speed of the fan can be accelerated or decelerated, which achieves the regulation of the fan air speed.

[0377]The technical effect of this embodiment is that: the control module generates a corresponding PWM control signal according to the received wind speed adjustment control signal, and the duty cycle of the PWM signal directly determines the conduction time of the switching tubes in each circuit, which in turn controls the current of the motor coils, and thus the motor rotational speed can be accurately adjusted by adjusting the duty cycle of the PWM signal.

[0378]As an embodiment, the portable fan further includes an energy return circuit, the energy return circuit connects the control module, the motor, and the energy storage unit, and when the control module detects a decrease in the PWM duty cycle, it controls the energy return circuit to start working, and the reverse electromotive force generated when the motor decelerates is converted into electrical energy through the rectifier circuit and stored in the energy storage unit. The energy recovery circuit includes a rectifier circuit, an energy storage unit, and a control switch, and after receiving the energy feedback signal, the control switch conducts, converting the kinetic energy of the motor into electrical energy through the rectifier circuit and storing it in the super capacitor or battery.

[0379]As an example, the portable fan is running at a high speed, at which time the user reduces the wind speed or stops the fan by means of the input module, and the control module detects the wind speed adjustment signal or the switch signal and reduces the duty cycle of the PWM signal to slow down the motor. The control module generates an energy return signal to control the energy recovery circuit to start. The reverse electromotive force generated when the motor decelerates is converted into electrical energy through the rectifier circuit, and the converted electrical energy is stored in the super capacitor or battery. When the fan starts again, the control module detects the start signal and controls the energy storage unit to release electrical energy to power the motor, reducing the consumption of external power.

[0380]The technical effects of this implementation are: through energy recovery, kinetic energy can be converted into electrical energy storage when the fan decelerates or stops, reducing energy waste; reducing the dependence on external power supply, extending the use time of the battery, and improving the endurance of the portable fan; and the user can enjoy a more stable and long-lasting adjustment of the wind speed in the process of using the fan, and improve the overall experience of using the fan.

[0381]As an embodiment, the input module 31 comprises a voice control module 312 and a touch control module 311, both the voice control module 312 and the touch control module 311 are connected to a control module 32, the voice control module 312 and the touch control module 311 output a switching signal and a wind speed adjusting control signal according to the user instructions respectively, and the control module 32 generates a switching control signal and a PWM control signal according to the switching signal and the wind speed adjusting control signal respectively.

[0382]The technical effect of this embodiment is that the combination of the voice module and the touch module allows the user to choose the most suitable operation method according to his or her preference, increasing the intelligence of the product.

[0383]As an embodiment, the input module 31 includes a voice control module 312 and a touch control module 311, the voice control module 312 and the touch control module 311 are both connected to a control module 32, the voice control module 312 opens and closes the touch control module 311 according to a user command, as well as outputs a switching signal, and the touch control module 311 outputs a wind speed adjustment control signal, and the control module 32 generates a switching control signal and a PWM control signal according to the switching signal and the wind speed adjustment control signal, respectively.

[0384]The user sends commands to the voice control module 312 to turn on or turn off the touch control module 311 through voice instructions, and the voice control module 312 transmits these commands to the control module 32. The user sends commands to the voice control module 312 to switch the fan on or off through voice instructions, and the voice control module 312 generates the switching signals according to the user's commands and transmits them to the control module 32. When the touch control module 311 is enabled, the user enters commands to adjust the wind speed to the touch control module 311 through a touch operation (e.g., sliding or clicking), the touch control module 311 generates a fan speed adjustment control signal based on the user's operation and transmits it to the control module 32, which enables or disables the touch control module 311 based on the command from the voice control module 312, and when the touch control module 311 is disabled, all the touch operations do not generate a fan speed adjustment control signal, thus avoiding misoperation. After receiving the switch signal, the control module 32 generates a switch control signal for controlling the fan on or off. After the control module 32 receives the wind speed adjustment control signal, it calculates the corresponding duty cycle of the PWM signal and generates a PWM control signal for controlling the speed of the motor.

[0385]The technical effect of this embodiment is: through voice instructions to enable or disable the touch control module, the user can disable the touch control module by voice when holding the fan, avoiding misoperation of wind speed adjustment caused by accidental touch, improving the user's operating experience and product safety; the switch signal generated by the voice control module is processed by the control module to ensure accurate switching operation of the fan; under the touch control module is in enabled state, the touch control module generates the wind speed adjustment control signal through the user's touch operation, and the control module generates the high-precision PWM control signal according to the signal, so as to achieve the precise adjustment of the fan speed and meet the user's personalized needs.

[0386]As an example, as shown in FIG. 5r, a circuit diagram of the drive module 33 is shown, the drive module 33 comprising a first drive sub-module, a second drive sub-module, and a third drive sub-module.

[0387]The first driver sub-module includes MOS tube Q1, MOS tube Q2, MOS tube Q7, capacitor C16, capacitor C21, capacitor C27, resistor R20, resistor R24, resistor R25, and resistor R26, and the first end of capacitor C16, the first end of resistor R24, the source of MOS tube Q2, the first end of capacitor C21, and the first end of capacitor C27 are co-linking and connecting to the power supply, the second end of capacitor C16 is connected to the second end of resistor R24, the drain of MOS tube Q1, and the gate of MOS tube Q2, the gate of MOS tube Q1 is connected to the first end of resistor R20 and first control signal terminal U_H, the source of MOS tube Q1 is connected to the second end of resistor R20 in common ground, the drain of MOS tube Q2 is connected to the drain of MOS tube Q7 and the first end of the first coil, respectively, the gate of MOS tube Q7 is connected to the first end of resistor R25 and the second control signal terminal U_L, respectively, and the source of MOS tube Q7 is connected to the second end of resistor R25 and the first end of resistor R26, respectively, and the capacitance C21 of the second terminal of capacitor C21 and the second terminal of capacitor C27 are jointly connected to ground.

[0388]The second driver sub-module includes MOS tube Q3, MOS tube Q4, MOS tube Q8, capacitor C26, capacitor C25, resistor R32, resistor R34, resistor R35, and resistor R38, and the first end of capacitor C26, the first end of resistor R34, the source of MOS tube Q4, and the first end of capacitor C25 are co-located and connected to the power supply. The second end of capacitor C26 is connected to the second end of resistor R34, the drain of MOS tube Q3, and the gate of MOS tube Q4, and the gate of MOS tube Q3 is connected to the first end of resistor R32 and the third control signal terminal V_H, the source of MOS tube Q3 is connected to the second terminal of resistor R32 in common ground, the drain of MOS tube Q4 is connected to the drain of MOS tube Q8 and the first end of the second coil, respectively; the gate of MOS tube Q8 is connected to the first end of resistor R35 and the fourth control signal terminal V_L, respectively, the source of MOS tube Q8 is connected to the second end of resistor R35 and the first end of resistor R38, respectively, and the second end of capacitor C25 is connected to ground.

[0389]The third driver sub-module includes MOS tube Q5, MOS tube Q6, MOS tube Q9, capacitor C32, capacitor C35, resistor R42, resistor R46, resistor R49, and resistor R51; the first end of capacitor C32, the first end of resistor R46, the source of MOS tube Q6, and the first end of capacitor C35 are co-connected and connected to the power supply; the second end of capacitor C32 is connected to the second end of resistor R46, the drain of MOS tube Q5, and the gate of MOS tube Q6, respectively; the gate of MOS tube Q5 is connected to the first end of resistor R42 and the fifth control signal terminal W_H, and the source of MOS tube Q5 is connected to the second end of resistor R42 in common ground; the drain of MOS tube Q6 is connected to the drain of MOS tube Q9 and the first end of the third coil, the gate of MOS tube Q9 is connected to the first end of resistor R49 and the sixth control signal terminal W_L, and the source of MOS tube Q9 is connected to the second end of resistor R49 and the first end of resistor R51, respectively; the second end of the capacitor C25 is connected to ground, and the second end of the resistor R26, the second end of the resistor R38, and the second end of the resistor R51 are co-connected to ground.

[0390]Therein, the power supply, the MOS tube Q2, the first coil, the second coil, the MOS tube Q8, and the resistor R38 form a first circuit; the power supply, MOS tube Q2, the first coil, the third coil, MOS tube Q9, and resistor R51 form a second circuit; the power supply, MOS tube Q4, the second coil, the third coil, MOS tube Q9, and resistor R51 form a third circuit; the power supply, MOS tube Q4, the second coil, the first coil, MOS tube Q7, and resistor R26 form a fourth circuit; the power supply, MOS tube Q6, the third coil, the first coil, MOS tube Q7, and resistor R26 form a fifth circuit; A fifth upper bridge arm switch tube, a third coil, a second coil, a MOS tube Q8, and a resistor R38 form a sixth circuit.

[0391]Among them, MOS tube Q2, MOS tube Q4, and MOS tube Q6 can be used as NMOS tubes or PMOS tubes, and the half-bridge drive mode of MOS tube Q2, MOS tube Q4, and MOS tube Q6 can be used in addition to the drive mode in the circuit diagram, and other drive modes can be used, such as capacitor storage drive, transformer-coupled drive, optically coupled drive, and so on.

[0392]The control module 32 inputs switching control signals to the two switching tubes in each circuit via the first control signal terminal to the sixth control signal terminal, and the control module 32 controls the first circuit to the sixth circuit via the switching control signals to conduct in the first circuit to the sixth circuit one by one in a preset order to drive the motor to start operation. The control module 32 inputs PWM control signals to the two switching tubes in each circuit through the first control signal terminal to the sixth control signal terminal, and controls the conduction current of each circuit through the duty cycle of the PWM control signals in order to regulate the rotational speed of the motor.

[0393]As an embodiment, as shown in FIG. 5s, two switching tubes of each bridge arm are integrated together in this embodiment, MOS tube Q2 and MOS tube Q7 are integrated into chip S1, MOS tube Q4 and MOS tube Q8 are integrated into chip S2, and MOS tube Q6 and MOS tube Q9 are integrated into chip S3, and the integration of the switching tubes can significantly reduce the space taken up on the circuit board, which makes the driving circuit more compact, the use of integrated switching tube module simplifies the circuit design and layout, reducing wiring complexity.

[0394]As an embodiment, as shown in FIG. 5t, the input module 31 includes a manual switch module 301, a touch control module 311, a voice control module 312, a networking module 36, and a wireless module 302, respectively, connected to the control module 32, and the portable fan further includes a fogging module 303, a refrigeration module 304, a heating module 305, a lighting module 306, and a rocker head module 307.

[0395]Among them, the manual switch module 301 can be a key switch or an encoder, the touch control module 311 can be a touch button, a slide resistor, a touch slide module, or a touch screen module, and the wireless module 302 can be a mobile control module, a Bluetooth control module, and a wireless control module;

[0396]Among them, the key switch can achieve manual control of the fan, by pressing the button to achieve the fan on, off, i.e. speed regulation. The encoder is used to regulate the air speed by rotating the encoder to change the setting of the fan speed. Touch buttons control the fan on/off and air speed adjustment by touch sensing. The sliding resistor enables the wind speed to be adjusted by sliding the resistor value, providing continuous wind speed regulation. The touch-slide module regulates the wind speed by sliding gestures and detects sliding parameters such as speed, direction and position to control the wind speed. The touch screen module provides a graphical interface to control a variety of functions through the touch screen, such as switching, wind speed adjustment, timer setting, and so on. The voice control module enables control of the fan's on, off and wind speed adjustment through voice commands, enhancing the intelligent control experience. The networked voice control module enables remote voice control by uploading voice commands to a cloud server for processing through an internet connection. The networking module enables remote control functions via the Internet, which allows you to remotely control the functions of the fan via mobile phones or other devices. The mobile control module can realize the control of various functions of the fan through mobile devices (such as mobile phones or tablet computers), including on/off, wind speed adjustment, timing and so on. The Bluetooth control module enables the connection of mobile devices via Bluetooth for close-range wireless control of the fan. Wireless control module can achieve remote control and management of the fan through wireless signals (such as Wi-Fi). The fogging module 303 can be realized to provide humidification function to make the wind blown by the fan cooler and wetter by fogging the moisture. The refrigeration module 304 can be realized to provide a cooling function to reduce the temperature of the outgoing air through an internal refrigeration element to enhance the cooling effect. The heating module 305 can be realized to provide a heating function, making the wind blown by the fan warm through the internal heating element, suitable for cold seasons. The lighting module 306 can be realized to provide a lighting function, integrating LED lights or other light sources to provide night lighting or decorative lighting effects. The rocker module 307 can be realized to provide an automatic oscillating head function, enabling the fan to oscillate from side to side, increasing the coverage of wind and improving comfort.

[0397]The technical effect of this embodiment is that the portable fan not only provides diversified control methods and intelligent functions, but also significantly improves the user's comfort experience and ease of operation, and meets a variety of needs in different use scenarios.

[0398]It should be noted that all the input, output and control functions in a portable fan can be integrated into a single chip or integrated circuit, and this integration can simplify the design and manufacturing process of the system, reduce the number of components and space occupation, and at the same time potentially reduce the cost and power consumption.

[0399]The sixth embodiment provides a portable fan based on a high-speed three-phase motor comprising at least a hand-held fan for hand-held use, a desktop fan for portable and desktop-ready use, or a neck-type fan for neck-type use.

[0400]The seventh embodiment.

[0401]The seventh embodiment provides a method of controlling a portable fan based on the portable fan provided in the Example, as shown in FIG. 6a, the method of controlling comprises:

[0402]Step S101: controls the operating voltage of the high-speed three-phase motor to be from 2 to 18 volts, controls the operating current of the high-speed three-phase motor to be from 0.1 to 10 amps, and/or controls the rated operating power of the high-speed three-phase motor to be from 0.5 to 100 watts.

[0403]Step S102: control the rated operating speed of the high-speed three-phase motor through the drive module according to the operating voltage, operating current and/or rated operating power control to reduce the high rotational noise of the high-speed three-phase motor and control the wind speed to be in a preset wind speed interval.

[0412]The switch signal and the wind speed adjustment control signal are control signals generated according to the user's instructions, and the touch signal and the adjustment signal generated by the user through touch or other means can be directly converted into the switch control and the PWM control signal, and the switch signal can be the user's switching operation, such as the command to turn on or turn off the fan; and the wind speed adjustment control signal is used for adjusting the rotational speed of the fan, which is usually generated by the user's manual operation or other control methods.

[0413]Wherein the switching signal is processed and converted into a switching control signal capable of controlling the bridge arm switching tube, which is used to start or stop the operation of the motor. The wind speed regulation control signal is processed to calculate the duty cycle of the corresponding PWM (pulse width modulation) control signal, and the PWM control signal is used to regulate the rotational speed of the motor, which is controlled by adjusting the on-time of the switching tubes of each bridge arm.

[0414]Wherein, based on the switching control signal, the drive module will turn on or off the switching tube of each bridge arm accordingly, thereby starting or stopping the operation of the motor. Meanwhile, according to the calculated PWM control signal, the drive module adjusts the operating period and duty cycle of the switching tubes of each bridge arm to control the rotational speed and power output of the motor.

[0415]As an embodiment, when the input module is a touch control module, converting the wind speed adjustment control signal into a PWM control signal comprises:

[0416]Calculate the PWM signal duty cycle according to the wind speed regulation control signal, and generate the PWM control signal according to the PWM signal duty cycle.

[0417]As an embodiment, when the input module is a voice control module, the voice control module captures the voice signal of the user and converts the voice signal into a switch signal and a wind speed adjustment control signal.

[0418]The above two embodiments, which can be seen in particular in the sixth embodiment, will not be repeated here.

[0419]The eighth embodiment, as shown in FIGS. 8a to 8z.

[0420]Please refer to FIG. 7a1 and 7b, an eighth embodiment of the present disclosure provides a neck fan 5, which includes at least one fan motor 50, at least one ventilation channel 56, and a first air outlet 561 and a first air inlet 562 connected to the ventilation channel 56. The at least one fan motor 50 is located inside the ventilation channel 56, and when it operates, it generates wind in the same direction as a rotation axis of the at least one fan motor 50. The generated wind in the axial direction further flows out through the ventilation channel 56. The at least one fan motor 50 can generate high-speed wind when operating at high speed. The fan motor 50 operates and forms an airflow through the ventilation channel 56 between the first air inlet 562 and the first air outlet 561. A direction of a rotation center axis of the at least one fan motor 50 is consistent with the direction of the airflow. Specifically, A speed of the at least one fan motor 50 can reach over 30000 revolutions per minute. The number of the at least one fan motor 50 installed in a single ventilation channel 56 may be one, two, three or more, and can be adjusted based on requirements for a wind speed.

[0421]In this embodiment, in order to meet requirements of different wind speeds in different application scenarios, as shown in FIG. 7b, at least two first air outlets 561 are provided on the ventilation channel 56. A first air outlet 561 can be located along a length direction of an end of the ventilation channel 56 opposite to the fan motor 50. The speed of the fan motor 50 is greater than 15000 revolutions per minute, and the wind speed of the airflow out from the first air outlet 561 reaches more than 4 meters per second.

[0422]It can be understood that above technical solutions relates to correlation among the rotational speed of the fan motor 50, the air output speed of the fan motor 50, and the air output speed of the first air outlet 561. Based on the rotational speed of the fan motor 50, the air output speed of the fan motor 50, the air output speed of the first air outlet 561, and related structural relationships between the fan motor 50 and the ventilation channel 56 in the above technical solutions can meet requirements of high-speed air output. Specifically, the wind speed of the airflow out from the fan motor 50 is greater than 12 meters per second, and the wind speed of the airflow out through ventilation channel 56 reaches 4.8 meters per second or more. This wind speed can solve impact of natural wind or surrounding environments on an operation effect of the neck fan 5.

[0423]In addition, the applicant of the present disclosure has found through repeated outdoor experiments, modifications, and trials that when used in hot and humid environments such as outdoors, either user's body temperature or outdoor environment temperature reaches a relatively high value. At this time, high-speed airflow can quickly promote air flowing, thus achieving temperature changes in surrounding environments around the first air outlet 561.

[0424]Specifically, in the embodiment of the present disclosure, the temperature of the airflow out from the first air outlet is defined as a first temperature, an air temperature in outside environment is defined as a second temperature, and a temperature of a mixed airflow of the airflow out from the first air outlet and the air in outside environment is defined as a third temperature. It can be understood that the third temperature is the temperature at which the airflow reaches the human body.

[0425]In existing neck fans, semiconductor cooling modules/semiconductor heating modules are arranged inside the neck fans. Semiconductor cooling can cool airflow and blow it back, which is prone to cause facial paralysis; In addition, if semiconductor heating modules are used in winter, it may cause local overheating and affect user's experience.

[0426]In above embodiments, the third temperature is set between the first temperature and the second temperature. By adjusting the temperature of the airflow out from the first air outlet and the air temperature of the outside environment, the temperature of the wind blown towards the human body can be adjusted between the first temperature of the airflow out from the first air outlet and the second temperature of the outside environment, so as to alleviate discomfort caused by local super-cooling or overheating of the blowing area by the high-speed wind of 4 meters per second by the mixed air of the third temperature.

[0427]More preferably, the rotational speed of the fan motor 50 can reach over 40000 revolutions per minute, and the wind speed of the airflow output by fan motor 50 can reach over 15 meters per second and below 20 meters per second. Specifically, the wind speed of the airflow output by the fan motor 50 can be 10 meters per second, 12 meters per second, 14 meters per second, 16 meters per second, 18 meters per second, etc. The wind speed of the airflow out through the ventilation channel 56 can reach 4.4 meters per second, 4.6 meters per second, 4.8 meters per second, 5 meters per second, 5.2 meters per second, 5.4 meters per second, 5.6 meters per second, 10 meters per second, etc. Preferably, the wind speed of the airflow out through the ventilation channel 56 is above 5.6 meters per second.

[0428]In some embodiments, the ratio of the wind speed of the airflow generated by the fan motor 50 to the wind speed output from the first air outlet 561 can be limited to (2-4):1, for example, the wind speed of the airflow generated by the fan motor 50 is greater than 15 meters per second, and the wind speed of the airflow out through the ventilation channel 56 is greater than 4 meters per second.

[0429]As shown in FIG. 7b, in this embodiment, the neck fan 5 is in a “U” shape as a whole, with two fan motors 50 located at a free end of the neck fan 5. The neck fan 5 includes two ventilation channels 56, which can be communicated with each other or not communicated with each other according to needs, so that the two ventilation channels 56 can work independently and output air.

[0430]The neck fan 5 shown in FIG. 7b is a neck fan that can be used on the neck of the human body to allow air out from the ventilation channel 56 to blow towards the user's face and head, thereby accelerating the air flow above the neck and helping the user dissipate heat. It can be understood that neck fan can also be handheld fans, clip on fans, versatile fans, and other neck fans.

[0431]Continuing with FIG. 7a1 and 7b, at least one silencing device 502 is installed in the ventilation channel 56. Furthermore, at least two silencing devices 502 are installed in the ventilation channel 56, with at least one silencing device 502 located between the first air inlet 562 and the fan motor 50, and at least another silencing device 502 located between the fan motor 50 and the first air outlet 561.

[0432]Specifically, the neck fan 5 includes two ventilation channels 56. There is a first air inlet 562 and a fan motor corresponding to the first air inlet in the ventilation channel 56, as shown in FIG. 7a1. The neck fan 5 is equipped with four silencing devices 502. Each fan motor 50 is equipped with two silencing devices 502, which means that there are two silencing devices 502 in each ventilation channel 56. One of the silencing devices 502 is arranged between the first air inlet 562 and the fan motor 50, while the other silencing device 502 is arranged between the fan motor 50 and the first air outlet 561.

[0433]In other embodiments, three silencing devices 502 can be installed within a single ventilation channel 56, with two silencing devices 502 positioned between the first air inlet 562 and the fan motor 50. Another silencing device 502 can be installed between the fan motor 50 and the first air outlet 561. The number of the silencing devices 502 can be multiple, and corresponding positions and quantities of the silencing devices 502 can be adjusted as needed.

[0434]As shown in FIG. 7b, there are two silencing devices installed inside the ventilation channel 56. One silencing device 502 can be specifically installed on an inner wall of the second air duct 58 adjacent to the first air inlet 562, and the other silencing device 502 can be specifically installed on the inner wall of the second air duct 58 adjacent to the second air outlet 564. Such arrangement can ensure that a silencing device 502 is installed at both air inlet and outlet ends of the fan motor 50, thereby further reducing noise generated by high-speed operation of the fan motor 50.

[0435]It can be understood that the specific number of the silencing devices 502, positions of the silencing devices relative to the fan motor 50, or the specific shape and structure of the silencing devices 502 can be adjusted based on a noise level and requirements.

[0436]As shown in FIG. 7a1 and 7b, the neck fan 5 further includes a cold compress device 503 connected to two independent ventilation channels 56. Two ends of the cold compress device 503 are respectively connected to the two ventilation channels 56, and connection methods can be hinge, clamp, elastic connection, or cam connection. The cold compress device 503 further includes a cold compress shell 5031 and a cold compress part 5032 at least partially exposed from the cold compress shell 5031. The cold compress part 5032 is equipped with a cooling component (not shown in FIG. 7f), which can be a Peltier semiconductor cooling component configured to provide a cooling effect for the human neck. It can be understood that the cold compress part 5032 can be liquid cooling, air cooling, semiconductor cooling, or other solid cooling.

[0437]In some specific embodiments, the neck fan 5 may not be equipped with a cold compress device 503, as shown in FIG. 7a2.

[0438]In other embodiments of the present disclosure, as shown in FIG. 7a2, a distance d1 between the silencing device 502 and an air inlet end 541 of the fan motor 50 is 0.1-0.7 times an inner diameter L3 of the motor housing 54;

[0439]In other embodiments of the present disclosure, a distance d2 between the silencing device 502 and an air outlet end 542 of the fan motor 50 is 0.1-0.7 times the inner diameter of the motor housing 54.

[0440]The above limits for the distance d1 and the distance d2 can be determined based on a type, a size, and noise requirements of a selected fan. The distance d1 and the distance d2 can be set to be the same or different.

[0441]Specifically, the distance d1 can be any value within a range of 0.1-0.7 times, which includes 0.1 times, 0.15 times, 0.2 times, 0.3 times, 0.4 times, 0.45 times, 0.5 times, 0.6 times, 0.65 times, or 0.7 times the inner diameter of the motor housing 54, etc. It can be understood that except for above times, the distance d1 can be any value within the range of 0.1-0.7 times.

[0442]Furthermore, the distance d2 can be any value within the range of 0.1 times, 0.15 times, 0.2 times, 0.3 times, 0.4 times, 0.45 times, 0.5 times, 0.6 times, 0.65 times, 0.7 times, etc. of the inner diameter of the motor housing 54. It can be understood that in addition to the specific times listed, it can also be any value within the range of 0.1-0.7 times.

[0443]In some specific embodiments, since the fan motor 50 outputs airflow in the high wind speed, accordingly, a corresponding instantaneous wind speed of the air flow generated by fan motor 50 during operation is relatively high, and the airflow will be a jet like instantaneous wind. A portion of the airflow will quickly flow to an end of ventilation channel 56 away from fan motor 50. As shown in FIGS. 7b and 7c, in some embodiments, the direction of the first air outlet 561 on the ventilation channel 56 is consistent with the rotation center axis I of the fan motor 50. Therefore, the high-speed airflow will quickly pass through the ventilation channel 56 and directly flows out from the first air outlet 561. At this time, the neck fan 5 can only output high-speed wind concentrated in a single wind direction. Long term use may cause discomfort to the human body. Therefore, the neck fan only outputting high-speed wind concentrated in a single wind direction cannot meet the increasingly diverse usage needs of the neck fan 5.

[0444]In order to improve comfort of using the neck fan 5, it is necessary to meet the high-speed and uniform airflow requirements of the neck fan 5. As shown in FIG. 7d and FIG. 7e, specifically in FIG. 7e, the airflow direction F1 refers to the airflow direction of the neck fan 5. The minimum angle between an extension line of the rotation center axis I of the fan motor 50 and an extension line of the airflow direction F1 is the above-mentioned angle a.

[0445]Additionally, the minimum angle a between the air outlet direction F1 of the first air outlet 561 of the ventilation channel 56 and the rotation center axis I of the fan motor 50 is 50°-90°.

[0446]It can be understood that in this technical solution, based on the limitation of the speed of the fan motor 50, the speed of the airflow output by the fan motor 50, and the speed of the airflow out from the first air outlet 561, the minimum angle a between the airflow direction F1 out from the first air outlet 561 of the ventilation channel 56 and the rotation center axis I of the fan motor 50 is further limited to 50°-90°, which defines a technical solution with technical features co-related. Therefore, in this technical solution, the neck fan 5 can provide high-speed and uniform airflow to solve the problem of poor user experience, especially when used outdoors, where the wind speed cannot reach expectations or output airflow is too concentrated.

[0447]Specifically, the minimum angle a between the air outlet direction F1 of the first air outlet 561 of the ventilation channel 56 and the rotation center axis I of the fan motor 50 may be 60°-70°, as shown in FIG. 7d. The minimum angle a between the air outlet direction F1 of the first air outlet 561 and the rotation center axis I of the fan motor 50 is 65-70° or 66°-67°.

[0448]As shown in FIG. 7c, the neck fan 5 is a neck fan that can be used on the neck of the human body to blow the wind from the ventilation channel 56 towards the user's face and head, thereby accelerating the air flow above the neck and helping the user dissipate heat.

[0449]As shown in FIG. 7d, the ventilation channel 56 further includes a first air duct 57 and a second air duct 58, wherein the fan motor 50 is located inside the second air duct 58, and the first air outlet 561 is located on the first air duct 57. The second air duct 58 is equipped with a first air inlet 562 at one end away from the first air duct 57.

[0450]As shown in FIGS. 7c, 7d, and 7e, within the range of the angle a mentioned above, a portion of the wind out by fan motor 50 will reach the end of ventilation channel 56 away from fan motor 50, gradually flowing back to the first air outlet 561 distributed on the ventilation channel 56 and flows out through the first air outlet 561, while the other portion will directly flow out from the first air outlet 561. By setting the above structures, it is possible to meet the demand for high wind speed and make the air velocity among multiple first air outlets 561 more uniform.

[0451]In this embodiment, in order to meet the demand for air velocity, the ventilation channel 56 can be curved as a whole along the airflow direction. As shown in FIGS. 7d and 7e, the ventilation channel 56 has an arc-shaped structure, that is, the central axis of the ventilation channel 56 is not in line with the rotational axis I of the fan motor 50.

[0452]It can be understood that the more the maximum rotation speed of the fan motor 50 is, the more the corresponding wind speed of the airflow output by the fan motor 50 is, and the greater the distance that the high-speed airflow generated by fan motor 50 can spray. Therefore, by setting the ventilation channel 56 in an arc shape and ensuring that the central axis of the ventilation channel 56 is not in a straight line with the rotational axis I of the fan motor 50 is more conducive to uniform air flow, thereby maintaining high air velocity and uniform air flow from the first air outlet 561 of the ventilation channel 56.

[0453]In other embodiments, the ventilation channel 56 may be in a linear shape along the airflow direction, and at this time, the first air outlet 561 is arranged on the side wall of the ventilation channel 56. At this time, the airflow direction F1 out from the first air outlet 561 of the ventilation channel 56 may also be at a certain angle respect to the axial flow direction of the fan motor 50.

[0454]Please continue to refer to FIG. 7f. The ventilation channel 56 further includes the first air duct 57 and the second air duct 58. The fan motor 50 is located inside the second air duct 58, and the first air outlet 561 is located on the first air duct 57. The second air duct 58 is equipped with a first air inlet 562 at one end thereof away from the first air duct 57. The end of the second air duct 58 adjacent to the first air duct 57 is equipped with a second air outlet 564, and the first air inlet 562 is located at the end of the second air duct 58 away from the second air outlet 564. The first air duct 57 is equipped with the first air outlet 561.

[0455]In some specific embodiments, as shown in FIG. 7f, a duct boosting section 59 may be provided between the first duct 57 and the second duct 58. The duct boosting section 59 plays a role in smoothly connecting the first duct 57 and the second duct 58. At the same time, due to the smooth change in curvature, the airflow sent from the second duct 58 to the first duct 57 can be gradually boosted to achieve a desired air output effect.

[0456]As shown in FIGS. 7f and 7g, the central axis of the air duct boosting section 59 along the airflow direction is inclined with the rotation central axis I of the fan motor 50 and the central axis P of the first air duct 57 along the airflow direction. In this embodiment, the air duct boosting section 59 serves to connect the second air duct 58 with the first air duct 57.

[0457]As shown in FIG. 7f, a second air inlet 563 is provided at one end of the first air duct 57 adjacent to the air duct boosting section 59, and the second air outlet 564 is provided at an end of the second air duct 58 adjacent to the air duct boosting section 59.

[0458]The ratio of a length of the first air duct 57 along the airflow direction to a length of the air duct boosting section 59 along the airflow direction is (1-10):1. Specifically, the ratio of the length of the first air duct 57 along the airflow direction to the length of the air duct boosting section 59 along the airflow direction is 1:1, 2:1, 3:1, 4:1 . . . 7:1, 8:1, 9:1, 10:1.

[0459]Furthermore, in some specific embodiments, the length of the air duct boosting section 59 is 10 mm-30 mm. Specifically, the length of the air duct boosting section 59 along the airflow direction can also be 15 mm-25 mm. Furthermore, the length of the air duct boosting section 59 along the airflow direction can also be 18 mm-20 mm.

[0460]It can be understood that if the inner wall between the first air duct 57 and the second air duct 58 is smoothly connected, a better airflow output effect can be achieved. As shown in FIG. 7g, the second air duct 58 and the first air duct 57 are connected to form the ventilation channel 56 with an airflow direction. The rotation center axis I of the fan motor 50 is inclined with the center axis P of the first air duct 57 along the air flow direction. As shown in FIGS. 7f and 7g, in order to achieve a better uniform airflow effect, and a minimum angle b between the central axis P of the first air duct 57 along the airflow direction F2 and the extension line of the rotation center axis I of the fan motor 50 can be limited to 15 degrees to 45 degrees. Furthermore, the minimum angle b can also be 15 degrees to 20 degrees, or alternatively, the minimum angle b can be 20 degrees to 25 degrees.

[0461]Among them, the rotation center axis I of fan motor 50 is aligned with the center axis of the second air duct 58. It can be understood that the inner walls of the second air duct 58, the air duct boosting section 59, and the first air duct 57 can guide the airflow output by the fan motor 50, thereby guiding the airflow output by the fan motor 50 to be blown to a designated position when passing through the ventilation channel 56, which is conducive to more uniform air output at the multiple first air outlets 561 of the ventilation channel 56.

[0462]In some embodiments, the neck fan 5 is a three-phase high-speed axial fan having a high rotation speed, which can increase air output of fan motor 50, and increase an initial velocity of the airflow, thereby greatly improving an air efficiency of the neck fan. At the same time, the three-phase high-speed axial fan has a wider range of wind speed regulation, which can achieve stepless speed regulation of the air output effect, making adaptability of the neck fan more extensive.

[0463]The neck fan 5 provided in the present disclosure adopts the high-speed axial flow fan to improve stable, low-noise, and high-speed airflow. Even after uniform air treatment, it can still maintain a wind speed of over 4.8 meters per second at the first air outlet 561, thereby reducing the impact of natural or other environmental winds on the air output effect. Therefore, in the present disclosure, the use of high-speed and efficient operating fans, optimized fan blade shapes, and appropriate airflow channels can provide strong wind while maintaining uniformity of the wind speed, allowing users to feel a comfortable wind without local strong or unevenness winds. This type of fan is particularly suitable for outdoor activities or high-temperature environments.

[0464]Specifically, as shown in FIGS. 7g, 7h, and 7i, a maximum sectional area S1 of the first air duct 57 perpendicular to the airflow direction is equivalent to a minimum sectional area S2 of the second air duct 58 perpendicular to the airflow direction. Specifically, the ratio of the maximum sectional area S1 of the first air duct 57 perpendicular to the airflow direction to the minimum sectional area S2 of the second air duct 58 perpendicular to the airflow direction is 0.9 to 1.2, and preferably, the ratio can be 0.95 to 1.

[0465]It can be understood that in related art, the relationship between an air volume, a wind speed, and a pipeline cross-sectional area (i.e., the sectional area perpendicular to the airflow direction) can be expressed as:

Q=V×A;

[0466]Where, Q represents a maximum air volume generated by fan motor 50, V represents a maximum wind speed of fan motor 50, and A represents a maximum sectional area of the first air duct 57.

[0467]In this embodiment, the wind speed out from fan motor 50 reaches 12-18 meters per second, and the cross-sectional area of the first air duct 57 is 230 to 260 square millimeters, accordingly, an inside volume of the first air duct 57 is 30000 to 40000 cubic millimeters.

[0468]That is, when the area of the maximum sectional area S1 of the first air duct 57 is equivalent to the area of the maximum sectional area S2 of the second air duct 58, the wind speed and the air volume of the airflow flowing in the first air duct 57 and the second air duct 58 are also equivalent.

[0469]As shown in FIG. 7i, the cross-sectional shape of the second air duct 58 along the direction perpendicular to the airflow is circular, which matches the shape of the fan motor 50 and is beneficial for the fan motor 50 to draw the airflow back and increase the inlet air volume. The cross-sectional shape of the first air duct 57 perpendicular to the airflow direction is flat, which further enhances the air output effect and allows the airflow output by the fan motor 50 to be pressurized and divided within the first air duct 57, thereby achieving more uniform air output.

[0470]It is necessary to avoid unnecessary vortices or noise caused by the different cross-sectional shapes of the second air duct 58 and the first air duct 57 when they are connected. It is prone to form vortex effects at the second air inlet 563 of the first air duct 57 when high-speed wind passes through. Based on FIG. 7f, the air duct boosting section 59 serves as a smooth transition between the first air duct 57 and the second air duct 58. In order to reduce vortices, in this embodiment, a smooth transition surface 591 is formed on the inner wall of the air duct boosting section 59, and a curvature of the transition surface 591 gradually decreases from the second air duct to the first air duct direction. The curvature range is 0.12 to 0.7.

[0471]It can be understood that the transition surface 591 of the air duct boosting section 59 can smoothly connect the inner wall surfaces of the second air duct 58 and the first air duct 57, thereby causing a Coanda effect of the wind. This can increase the pressure of the wind without obstructing its flow, and also reduce the noise due to obstructed airflow.

[0472]Continuing referring to FIGS. 7h and 7i, in order to further increase the air pressure blowing into the first air duct 57, the maximum inner diameter T2 of the cross-section of the second air duct 58 perpendicular to the airflow direction can be made smaller than the maximum inner diameter T1 of the cross-section of the first air duct 57 perpendicular to the airflow direction. Specifically, as shown in FIG. 7h, the cross-sectional shape of the first air duct 57 along the direction perpendicular to the airflow is flat, and its corresponding maximum inner diameter T1 ranges from 28 mm to 50 mm. As shown in FIG. 7i, the cross-sectional shape of the second air duct 58 perpendicular to the airflow direction F2 is circular, and its corresponding maximum inner diameter T2 ranges from 25 mm to 40 mm.

[0473]Further referring to FIG. 7h and FIG. 7j, the cross-sectional shape of the first air duct 57 along the direction perpendicular to the airflow is a flat “□” shape. Specifically, the first air duct 57 includes a hollow body 571 and an extension section 572. The extension section 572 is formed by extending from an outer wall of the hollow body 571, a main air channel 5711 is formed inside the hollow body 571, and an auxiliary air channel 5712 is formed between the extension section 572 and the outer wall of the hollow body 571, and the main air channel 5711 and the secondary air channel 5712 are connected.

[0474]The volume of the main air channel 5711 is larger than that of the auxiliary air channel 5712. There is a spacing between the connecting port between the main air channel 5711 and the auxiliary air channel 5712 and the first air outlet 561, so that during the process of blowing air from the main air channel 5711 to the first air outlet 561, the air is continuously compressed, and the air can be blown out from the first air outlet 561 at a faster speed. Specifically, the spacing is 1 to 3 times the width of the connecting port between the main air channel 5711 and the auxiliary air channel 5712, such as 1.3 times, 1.5 times, 1.8 times, 2 times, etc.

[0475]As shown in FIG. 7h and FIG. 7j, when the wind output by the fan motor 50 enters the first air duct 57 through the air duct boosting section 59, a part of the wind will first reach a distal end of the first air duct 57 and then flow back, forming an inverted “□” shape or a rotated “e” shape. Then, it enters the auxiliary air channel 5712 through the main air channel 5711 and is further blown out from the first air outlet 561 located at the outlet of the auxiliary air channel 5712.

[0476]Please referring to FIG. 7k, a maximum inner diameter a1 of the auxiliary air channel 5712 is smaller than the maximum inner diameter a2 of the main air channel 5711. Along the blowing direction of the wind, the width of the air channel gradually decreases, which can also gradually increase the pressure of the wind during the blowing process, thereby increasing the wind speed out from the first air outlet 561.

[0477]Continuing referring to FIG. 7k, the width at the connection port between the main air channel 5711 and the auxiliary air channel 5712 is denoted as width K1, while the width of the first air outlet 561 is denoted as width K2, and the width K1 is greater than the width K2.

[0478]Specifically, the width K1 is 4 mm to 7 mm, and the width K2 is 1 mm to 3 mm.

[0479]In some embodiments, a maximum inner diameter a1 is equal to the width K1 of the auxiliary air channel 5712, both of which are used to limit the inlet of the auxiliary air channel 5712. This allows the airflow to gradually increase in pressure and flow out after entering the auxiliary air channel 5712, thereby further improving an airflow output velocity and stability of the first air outlet 561.

[0480]The ratio of the width K2 of the first air outlet 561, the width K1 of the connecting port between the main air channel 5711 and the auxiliary air channel 5712, and the maximum inner diameter T1 of the cross-section perpendicular to the airflow direction of the first air duct is 1:(2-5):(3-10). Specifically, the ratio of the width K2 of the first air outlet 561, the width K1 of the connecting port between the main air channel 5711 and the auxiliary air channel 5712, and the maximum inner diameter T1 of the cross-section perpendicular to the airflow direction of the first air duct can be 1:2:3, 1:3:5, or 1:4:8.

[0481]The purpose of setting the relevant ratios is to have the wind pressure gradually increase during the process of having the wind to enter the auxiliary air channel 5712 from the main air channel 5711 and then be blown out from the first air outlet 561 under the premise of having the same air volume passing through since sizes of the air channel and the air outlets are gradually decreased.

[0482]Continuing referring to FIGS. 7j, 7k, and 7l, there is also a guide 573 located on the side adjacent to the extension section 572. The guide 573 runs along the extension section 572 and is connected to the outer wall of the hollow body 571, which can continue to guide the airflow blown out from the first outlet 561 of the auxiliary air channel 5712 towards the face and head of the human body. Specifically, the guide 573 can together with the outer wall of the hollow body 571 define a guide channel, and the airflow blown out from the first air outlet 561 will form a wall attachment effect on a side of the guide 573 facing the hollow body 571. This can further concentrate the airflow blown out from the first air outlet 561 of the auxiliary air channel 5712 towards the user's face and head, improving the air output efficiency and use comfort. The guide 573 and the hollow body 571 can be integrally formed or separately arranged. When the two are separated, the guide 573 can be fixed to the outer wall of the hollow body 571 by means of clamping, screw connection, etc.

[0483]Continuing referring to FIG. 7l, a third air outlet 205 is provided at the end of the first air duct 57 away from the fan motor 50. The third air outlet 205 is arranged on the wall of the hollow body 571, and the third air outlet 205 can output wind to the back of the human neck, thereby providing users with a more comfortable and comprehensive heat dissipation experience and avoiding stuffiness at the neck where the user wears the neck fan. As shown in FIG. 7l, the direction indicated by the arrow is the flow direction of the neck fan 5.

[0484]Please refer to FIG. 7m, in order to increase the wind speed of the first air outlet 561 and make the air output more uniform, at least one guide plate 570 is installed between the inner wall of the extension section 572 and the outer wall of the hollow body 571. It can be understood that multiple first air outlets 561 are formed among the outer wall of the hollow body 571, the inner wall of the extension section 572, and the guide plate 570. The first air outlet 561 is arranged along an arc length direction of the first air duct 57. Thus, the first air duct 57 can have a more uniform air output.

[0485]Please referring to FIG. 7m, the spacing d between multiple adjacent guide plates 570 is equivalent, where the spacing d is defined as the distance between two adjacent guide plates 570 along the arc direction of the first air duct 57. It can be understood that in some embodiments, in order to meet the requirements of different lengths of the first air duct 57 or different air outlets, the distance between the guide plates 570 can also be adjusted based on the wind speed. This is only an example and not a limitation of the present disclosure. As shown in FIG. 7m, the spacing d is 15 mm-25 mm, and specifically, the spacing can be 18 mm.

[0486]Please referring to FIG. 7n, additionally, in order to improve the air output effect of the neck fan, a minimum angle c between the guide plate 570 and the airflow direction F2 in the first air duct is 45 degrees to 65 degrees. The wind generated by fan motor 50 enters the first air duct 57 through the air duct boosting section 59. As the guide plate 570 is set at an angle to the airflow direction, some of the wind passing through the first air duct 57 will be blocked by the guide plate 570 and then diverted. Specifically, the minimum angle c between the guide plate 570 and the airflow direction F2 in the first air duct is 50 degrees to 55 degrees.

[0487]As shown in FIG. 7n, a side of the guide plate 570 facing the airflow direction in the first air duct is concave, and the concave surface can better guide the airflow towards the first air outlet 561. This arrangement can prevent generation of vortices on the side of the guide plate 570 away from the air inlet direction after the air in the first air duct 57 is diverted out, thereby further improving smoothness of the air flow in the first air duct 57 and reducing generation of noise.

[0488]Further referring to FIGS. 7k, 7m, and 7n, in order to make the overall structure of the first air duct 57 more stable and easier to form and assemble during the production process, a groove 5713 is provided on the outer wall of the hollow body 571, and the guide plate 570 is at least partially embedded in the groove 5713. The groove 5713 provides positioning support for the guide plate 570 to make the structure of the first air duct 57 more stable. Furthermore, an airflow diversion is formed among the guide plate 570, the outer wall of the hollow body 571, and the inner wall of the extension section 572 to better deliver air to the face and head of the human body.

[0489]As shown in FIGS. 7o and 7p, in other embodiments of the present disclosure, the first air outlet 561 is arranged at the top of the first air duct 57 facing the human face. Specifically, taking a cross-section perpendicular to the airflow direction as a reference plane, the guide plate 570 includes a resisting surface 5701 arranged parallel to the reference plane and a guiding surface 5702 arranged perpendicular to the reference plane. The resisting surface 5701 and the guiding surface 5702 form an “L”-shaped structure, with an opening side of the “L”-shaped structure facing the fan motor 50. The air output by fan motor 50 is gradually diverted through the guide surface 5702 and then turns towards the first air outlet 561 through the blocking surface 5701.

[0490]As shown in FIGS. 7o and 7p, both the blocking surface 5701 and the guiding surface 5702 are located adjacent to the first air outlet 561. The blocking area of the blocking surface 5701 of the multiple guiding plates 570 gradually increases along the airflow direction. A distance that the guiding surface 5702 of the guiding plate 570 extends inside the first air duct 57 in a direction perpendicular to the first air duct 57 is defined as a height of the guiding surface 5702. Therefore, the height of the guiding surface 5702 gradually decreases, that is, the closer it is to the fan motor 50, the smaller the volume occupied by the guiding plate 570 in the first air duct 57. This arrangement can better distribute the airflow along the air flow direction in the first air duct 57 and meet the demand for air output.

[0491]Please referring to FIG. 7q1, in some embodiments, the three-phase high-speed axial fan has a high rotational speed, a large air output, and a higher initial airflow velocity, which can greatly improve the air output efficiency of the neck fan, especially the neck hanging fan. At the same time, the three-phase high-speed axial fan has a wider range of wind speed regulation, which can achieve stepless speed regulation of the air output effect, making adaptability of the neck fan more extensive.

[0492]It can be understood that the main noise of the neck fan 5 that can provide high-speed wind in the present disclosure comes from the fan motor 50 that generates high-speed airflow during high-speed operation. As shown in FIG. 7q1, FIG. 7q2, and in combination with FIG. 7r1, the fan motor 50 includes the motor housing 54 with a fan channel 549 inside. The fan motor 50 further includes an impeller 501 and a high-speed three-phase motor 53 arranged inside the fan channel 549. The impeller 501 is connected to a shaft of the high-speed three-phase motor 53, and the high-speed three-phase motor 53 drives the impeller 501 to rotate, forming an airflow F2 in the fan channel 549.

[0493]The high-speed three-phase motor has a higher rotational speed, and the initial velocity of the airflow output by fan motor 50 is higher, resulting in better air output effect.

[0494]In the above embodiment, as shown in FIG. 7q1 and FIG. 7r1, the air inlet end and the air outlet end are respectively arranged at two opposite ends of the motor housing 54. The motor housing 54 can wrap both the fan blades 52 and the high-speed three-phase motor 53 in the fan motor 50. The motor housing 54 can constrain the airflow generated by the fan blades 52, so that the airflow output by the fan motor 50 has the least possibility of lateral movement. The kinetic energy of the airflow output by the fan motor 50 is more concentrated, which can further reduce the aerodynamic noise of the neck fan 5 and improve the efficiency of the neck fan 5. The fan blade 52 is located inside the motor housing 54, which can enhance the safety of the fan blade 52 and avoid the problem of damage caused by contact of the fan blade 52 with other components arranged in the second air duct 58 after the fan blade is exposed. The arrangement of motor housing 54 further improves overall integrity of the fan motor 50, facilitating production, manufacturing, and installation. At the same time, it enhances the stability of the fan motor 50 to meet requirements of high-speed operation, while also reducing the overall noise of fan motor 50.

[0495]Continuing referring to FIG. 7r1, the ratio range of the inner diameter of the motor housing 54 to the maximum outer diameter L1 of the impeller 501 is 1.01-1.15. Specifically, the ratio of the inner diameter of the motor housing 54 to the maximum outer diameter L1 of the impeller 501 can be 1.01, 1.05, 1.08, 1.1, 1.15, etc., or any value range within the above numerical range.

[0496]As shown in FIG. 7r1, in some specific embodiments of the present disclosure, the motor housing 54 includes the air inlet end 541 and the air outlet end 542, and two silencing devices 502 are provided at the air inlet end 541 and the air outlet end 542. It can be understood that in this structure, the silencing device 502 is in contact with the motor housing 54 of the fan motor 50.

[0497]As shown in FIG. 7q1 and FIG. 7q2, in some modified embodiments, two silencing devices 502 are arranged adjacent to the air inlet end 541 and the air outlet end 542, where “adjacent to” can be understood that there is a certain distance between the silencing device 502 and the fan motor 50.

[0498]Further combining with FIG. 7r1 and 7s, the fan motor 50 includes a hub 51 connected to the central rotation axis of the fan motor 50, the fan blades 52 located on an outer circumference of the hub 51, and the high-speed three-phase motor 53 connected to an end of the central rotation axis away from the hub 51. The central rotation axis is aligned with the airflow direction. The outer diameter L2 of the impeller 501 formed by the hub 51 and the fan blades 52 is 14 mm-30 mm. Specifically, the outer diameter L2 of the impeller 501 can further be 18 mm-22 mm, and the outer diameter L2 of the impeller 501 can also be 14 mm, 18 mm, 20 mm, 22 mm, 25 mm, 27 mm, 30 mm, etc.

[0499]The use of impeller 501 with above-mentioned outer diameter ranges can meet needs of miniaturized of the fan motor 50 and maintain high-speed and stable operation of the fan motor 50.

[0500]As shown in FIG. 7s, the ratio of the outer diameter L1 of the hub 51 to the outer diameter L2 of the impeller 501 is 0.5 to 0.8. Specifically, the ratio of the outer diameter L1 of the hub 51 to the outer diameter L2 of the impeller 501 is 0.55 to 0.7. In some specific implementations, the outer diameter L1 of the hub 51 is 12 mm to 15 mm.

[0501]Continuing referring to FIG. 7r1 and 7r2, an end of the motor housing 54 is in contact with or spaced apart from a first bearing 532. The high-speed three-phase motor 53 is mounted on the motor housing 54 and the first bearing 532, and an end of a rotating shaft 531 of the high-speed three-phase motor 53 passes through the first bearing 532 and is connected to the motor housing 54; The fan blade 52 is connected to the other end of the rotating shaft 531.

[0502]Since the first bearing 532 is made of metal and has a higher physical strength, it can provide stronger support for the high-speed three-phase motor 53. At the same time, the support strength of the first bearing 532 is higher, which can avoid the problem of damage and breakage of the fan casing 54 due to an excessive force when the high-speed three-phase motor 53 rotates at high speed, thereby prolonging the service life of the fan module. At the same time, the arrangement of the first bearing 532 shortens the length of the motor housing 54, which shortens the torque when the motor housing 54 is subjected to a force. It allows the first baring 532 to bear a greater force from the high-speed three-phase motor 53, making the rotation of the high-speed three-phase motor 53 more stable and the air output efficiency higher.

[0503]In some embodiments, the high-speed three-phase motor 53 further includes a coil 535 and a magnetic ring 534. The magnetic ring 534 is mounted on the motor housing 54 and the first bearing 532, the high-speed three-phase motor 53 is mounted on the magnetic ring 534, and the magnetic ring 534 is mounted on the coil 535. In this embodiment, an accommodating chamber is provided on the fan blade 52, and the inner surface of the accommodating chamber is fitted onto the coil 535. When the high-speed three-phase motor 53 rotates, the coil 535 drives the magnetic ring 534 to rotate, and then the magnetic ring 534 drives the fan blade 52 to rotate. During this process, the rotating shaft 531 no longer provides a driving force for the fan blade 52 like traditional motors, but plays a role in stabilizing and fixing the fan blade 52. Under such rotation manner, since an area of a turning force acted on the fan blade 52 by the magnetic ring 534 is larger, the inertia moment of the fan blade 52 is less, which can enable the fan blade 52 to rotate at a high speed and stably. As shown in FIG. 7a2, in some embodiments, the high-speed three-phase motor 53 includes the coil 535, the magnetic ring 534, and a motor shell 533. The coil 535 is arranged on the motor housing 54 and the first bearing 532, the magnetic ring 534 is arranged on the coil 535, and the motor shell 533 is arranged on the magnetic ring 534. The motor shell 533 is fixedly connected to the rotating shaft 531, so that the motor shell 533 can drive the rotating shaft 531 to rotate. In this embodiment, the coil 535 drives the magnetic ring 534 to rotate. When the magnetic ring 534 rotates, it drives the motor shell 533 to rotate synchronously, and then the motor shell 533 drives the rotating shaft 531 connected to it to rotate. This connection method and driving method, due to the larger area of the turning force exerted on the magnetic ring 534, and the magnetic coupling connection between the magnetic ring 534 and the coil 535, can make the rotation speed of the magnetic ring 534 faster and more stable, thus making the rotation speed of the high-speed three-phase motor 53 faster and more stable. At the same time, due to the connection between the motor shell 533 and the rotating shaft 531, the rotational torque between the rotating shaft 531 and the fan blade 52 is smaller, and the rotational inertia resistance of the fan blade 52 is also smaller. When rotating at a high speed, the fan blade 52 is less likely to shake and resonate, making the rotation of the fan blade 52 more stable and in a higher speed. Meanwhile, due to the more stable assembly, it can effectively reduce the noise generated by high-frequency vibration and improve user comfort.

[0504]The coil 535 is in interference fit with the motor housing 54, the magnetic ring 534 is magnetically coupled with the coil 535, and the motor shell 533 is in interference fit with the rotating shaft 531. During the rotation of the magnetic ring 534 and the coil 535, the magnetic ring 534 rotates in a suspended manner, which causes less physical friction compared to traditional motors. Therefore, it can further increase the rotation speed of the high-speed three-phase motor 53.

[0505]In some embodiments, the connection between the coil 535 and the motor housing 54 is not limited to interference fit. Depending on specific application scenarios, the connection method between the coil 535 and the motor housing 54 can also include (but is not limited to) fixed methods such as adhesive bonding, welding, riveting, and screw connections.

[0506]In some embodiments, the connection between the motor shell 533 and the rotating shaft 531 is not limited to interference fit. Depending on specific application scenarios, the connection method between the motor shell 533 and the shaft 531 can also include (but is not limited to) fixed methods such as adhesive bonding, welding, riveting, and screw connections.

[0507]Furthermore, as shown in FIG. 7r1 and 7r2, a securing slot 539 is defined on the rotating shaft 531 and configured to cooperate with a circlip 537. Arrangement of the circlip 537 and the securing slot 539 can improve stability of the installation of the rotating shaft 531.

[0508]Referring further to FIG. 7r1 and FIG. 7r2, the impeller 501 further includes the hub 51 and the fan blades 52 located at the outer circumference of the hub 51. The hub 51 is connected to the rotating shaft of the high-speed three-phase motor 53, and the ratio of the outer diameter of the hub 51 to the outer diameter of the impeller 501 is 0.5-0.8. The projections of adjacent fan blades 52 along the airflow direction overlap at least partially. This arrangement can further reduce the noise generated by the fan motor 50 during operation, thereby achieving better fan operation and user experience.

[0509]As shown in FIG. 7r1, an outer surface of the fan housing is provided with a protective component 55, which is specifically arranged between the inner surface of the ventilation channel and the outer surface of the fan housing.

[0510]As shown in FIG. 7t, projections of adjacent fan blades 52 along the airflow direction overlap at least partially.

[0511]Furthermore, referring to FIG. 7t, FIG. 7u, and FIG. 7v, it can be seen that each fan blade 52 includes a blade top 521 facing the air inlet direction and a blade root 522 away from the air inlet direction. An outlet wing angle θ of the blade top 521 is 30°-50°. Additionally, an outlet wing angle θ of the blade top 521 is set to 43°-46°, which is beneficial for making air intake and output of the fan motor 50 smoother, making wind concentrated, and improving efficiency of the fan motor 50. As shown in FIG. 7t, by limiting the outlet wing angle θ, the fan blades 52 can be tilted at a certain angle relative to the air inlet direction, thereby reducing the noise generated by the fan motor 50 during high-speed rotation.

[0512]Specifically, as shown in FIG. 7v, a distance b1 between the blade tops 521 of two adjacent fan blades 52 is 2.5 mm-5 mm, and a distance b2 between the blade root portions 522 of two adjacent fan blades 52 is 3 mm-6 mm. Specifically, the distance between the blade tops 521 can also be 3.5 mm-4.5 mm, and the distance between the blade root portions 522 can be 4 mm-5 mm. Furthermore, the distance between the blade tops 521 of the two adjacent blades can be 4 mm, 3.8 mm, etc., and the distance between the blade roots 522 of the two adjacent blades can be 4.3 mm, 4.5 mm, 4.8 mm, etc.

[0513]The arrangement of the fan blades 52, as well as the limitation of the outer diameter size of the hub 51 and the impeller 501, can make flow of wind generated by the fan motor 50 along the rotation axis of the fan motor 50 more uniform. The fan motor 50 is in a streamlined shape, which can make the flow of the wind generated by fan motor 50 more uniform and further reduce the noise generated by fan motor 50 during operation.

[0514]It can be understood that the limitations on the outer diameter size and shape of the hub 51 can further have a significant impact on the wind speed, air volume, and other factors of the airflow generated by the fan motor 50. Specifically, the hub 51 is formed by the superposition of a cylindrical segment and a conical segment, the fan blades 52 partially located on the cylindrical segment and partially located on the conical segment, which can not only ensure a high wind speed and a high volume but also improve the stability of the fan blades 52 during operation to achieve better performance.

[0515]Continuing referring to FIG. 7r1, the rotational speed of the high-speed three-phase motor 53 is higher, and the initial velocity of the airflow output by the fan motor 50 is higher, resulting in better wind effect.

[0516]In some embodiments, as shown in FIG. 7r1, the fan motor 50 further includes the fan housing 54, and the air inlet and the air outlet air are respectively arranged at opposite ends of the fan housing 54. The fan housing 54 can wrap both the fan blades 52 and the high-speed three-phase motor 53 in the fan motor 50. The fan housing 54 can constrain the airflow generated by the fan blades 52, so that the airflow output by the fan motor 50 has the minimum lateral movement kinetic energy. The kinetic energy of the airflow output by the fan motor 50 is more concentrated, which can further reduce the aerodynamic noise of the neck fan 5 and improve the efficiency of the neck fan 5. The fan blade 52 is located inside the fan housing 54, which can enhance safety of the fan blades 52 and prevent it from being exposed to contact with other components arranged in the second air duct 58 to cause damage. The arrangement of the fan housing 54 further improves overall integrity of the fan motor 50, facilitating production, manufacturing, and installation. At the same time, it enhances the stability of the fan motor 50 to meet the requirements of high-speed operation, while reducing overall noise of the fan motor 50.

[0517]In some specific embodiments of the present disclosure, since the speed of the fan motor 50 can reach over 30000 revolutions per minute, and the wind speed output through the ventilation channel 56 reaches over 4.8 meters per second, noise of the neck fan 5 is the main problem that needs to be solved in the present disclosure. The noise is mainly concentrated in the second air duct 58 that houses the high-speed three-phase motor 53. In order to reduce the discomfort caused by the noise to the user, it is necessary to control the noise related to the second air duct 58 below 75 db, or even below 65 db. A noise pressure inside the second air duct 58 is generated by structures such as the fan blades 52 and the high-speed three-phase motor 53. Therefore, in order to reduce noise, as shown in FIG. 7w, the silencing devices 502 can be installed inside the second air duct 58, which can effectively reduce the noise generated by high-frequency vibration of the fan motor 50.

[0518]Furthermore, in order to reduce specific high-frequency noise generated by operation of the fan motor 50, it is necessary to further adjust the internal structures of the fan motor 50.

[0519]As shown in FIG. 7w, the silencing devices 502 are installed on the inner wall of the second air duct 58 adjacent to the first air inlet 562 and/or the inner wall of the second air duct 58 adjacent to the second air outlet 564.

[0520]As shown in FIG. 7w, the silencing devices 502 are located on the side of the second air duct 58 adjacent to the first air inlet 562 and on the side of the second air duct 58 adjacent to the second air outlet 564.

[0521]It can be understood that based on different models of the high-speed three-phase motor 53 or the neck fan 5, requirements on noise are different. In other specific embodiments, the silencing devices 502 may be installed only on one side adjacent to the first air inlet 562 or the second air outlet 564.

[0522]As shown in FIG. 7w, the silencing device 502 further includes a support member 5021 and a silencing member 5022. The support member 5021 is configured to provide fixed support for the silencing member 5022. Specifically, the support member 5021 is located between the inner wall of the second air duct 58 and the silencing member 5022.

[0523]Furthermore, the support member 5021 is a circular structure, and a space is defined between the support member 5021 and the inner wall of the ventilation channel 56 for accommodating at least a portion of the silencing member 5022.

[0524]Furthermore, the support member 5021 is a ring-shaped structure, and the silencing member 5022 is a hollow ring-shaped structure. A space is formed between the support member 5021 and the inner wall of the second air duct 58 for accommodating the silencing member 5022. Furthermore, in order to achieve a better fixed structure, the support 5021 is equipped with a fixed structure connected to the inner wall of the second air duct 58, which can be fixed by clamping, screwing, adhesive bonding, etc.

[0525]In other embodiments, the support member 5021 is provided on the inner wall of the second air duct 58, and the silencing member 5022 is arranged on the support member 5021, that is, the support member 5021 is first formed, and then the silencing member 5022 is formed on the support member 5021 or inserted into the support member 5021. The support member 5021 is configured to provide a skeleton structure for supporting the silencing member 5022. In this embodiment, the support member 5021 is specifically a circular structure, and the silencing member 5022 is a hollow circular structure.

[0526]Furthermore, in order to achieve better noise reduction effect and avoid the influence of the silencing device 502 on the air inlet and air output of the fan motor 50, an inner diameter L3 of the hollow annular noise reduction device 502 formed by connecting the support member 5021 and the silencing member 5022 is equivalent to an outer diameter L2 of the impeller of the fan motor 50.

[0527]Specifically, the difference in size between the inner diameter L3 of the silencing device 502 and the outer diameter L2 of the impeller of the fan motor 50 is 0.95-1.05, so that the air entering through the first air inlet 562 can smoothly pass through the silencing device 502 and enter an air duct of the fan motor 50.

[0528]In order to firmly fix the silencing device 502 inside the second air duct 58. The support member 5021 includes one or a combination of a plastic skeleton, a carbon fiber skeleton, a nano material skeleton, etc. The silencing member 5022 includes but is not limited to a sound-absorbing cotton, a foam, etc., specifically including at least one or a combination of the following: sound-absorbing cotton: such as polyester fiber cotton, glass fiber cotton, which can effectively absorb sound and reduce echoes; a foam material: such as polyurethane foam, which has good sound absorption effect, is commonly used inside the fan housing; rubber pad or vibration isolation pad: configured to reduce transmission of mechanical vibration and noise. A spray material: it may be an acoustic coating, which can be directly applied to the inner wall of the second air duct 58 or the surface of the fan motor 50 to increase sound absorption performance and achieve shock absorption effect.

[0529]Continuing referring to FIGS. 7w and 7y, an air inlet cover 5621 can also be installed at the first air inlet 562. The air inlet cover 5621 is equipped with a screen mesh, allowing external air to smoothly enter the second air duct 58 through the air inlet cover 5621. The air inlet cover 5621 can prevent foreign objects from entering the second air duct 58 through the first air inlet 562, thereby avoiding an impact of foreign objects on the operation of the fan motor 50 in the second air duct 58.

[0530]Please referring to FIG. 7z, in some specific embodiments of the present disclosure, the neck fan 5 further includes a control module 504 and a drive module 505. The control module 504 can control a rated working speed of the high-speed three-phase motor 53 through the drive module 505 based on a working voltage, a working current, and/or a rated working power, in order to reduce the high-speed noise of the high-speed three-phase motor 53 and control the wind speed within the preset wind speed range.

[0531]This technical solution achieves driving the high-speed three-phase motor under a low-voltage through cooperation of the control module 504 and the drive module 505, in order to meet specific requirements of portable fans. It is necessary to adjust the number of slots and pole pairs to adapt to low voltage operation, to select high-performance iron core materials to reduce magnetic losses, to improve work efficiency under low voltage, to adopt a high-efficient inverter to convert low-voltage DC power into three-phase AC power to ensure power supply stability, and to avoid voltage fluctuations affecting motor performance.

[0532]The working voltage range is 3 to 6 volts, the working current range is 0.25 to 2 amps, and the rated working power range is 1 to 10 watts. The design of the high-speed three-phase motor 53 can rotate in a higher speed and output power more efficiently compared to existing portable fan motors at low voltages, which is suitable for the requirements of portable devices. The control module 504 precisely controls the high-speed three-phase motor 53 based on real-time monitoring of the working voltage, the working current, and the rated working power. By adjusting power supply parameters of the high-speed three-phase motor 53, the control module 504 can effectively reduce noise generated during high-speed operation of the motor. The control module 504 can also adjust the wind speed of the fan to be within a preset wind speed range, ensuring comfort and stability compared to single-phase low-speed motors. The drive module 505 is connected to the control module 504 and the high-speed three-phase motor 53, converting instructions of the control module 504 into actual motor drive signals. The drive module 505 uses efficient inverter technology to convert low-voltage DC power into AC power suitable for the high-speed three-phase motor 53, ensuring efficient operation of the fan motor. Under different working conditions, the drive module 505 adjusts the motor speed and the output power according to the instructions of the control module 504.

[0533]The technical effect of this embodiment is that this technical solution provides an efficient, low-noise, and adjustable wind speed portable fan solution by combining the control module, the drive module, and the high-speed three-phase motor. Through low-voltage drive technology and precise control strategy, not only does it improve portability and comfort of the fan, but it also effectively enhances overall performance and energy efficiency of the device. This design solution is suitable for portable fan application scenarios that requires high performance and low noise, filling a blank in application of high-speed three-phase motors in small portable devices in the market.

[0534]As an embodiment, when the working voltage of the high-speed three-phase motor 53 is 3 volts to 6 volts, the working current of the high-speed three-phase motor 53 is 0.12 amps to 2 amps, and/or the rated working power of the high-speed three-phase motor 53 is 1 watt to 9 watts, the control module 504 controls the rated working speed of the high-speed three-phase motor 53 to 6,000-45,000 revolutions per minute through the drive module 505 based on the working voltage, the working current, and/or the rated working power.

[0535]The high-speed three-phase motor 53 is driven in a voltage range of 3 volts to 4.5 volts, suitable for power supply of two batteries connected in series, with a working current range of 0.25 amps to 1.8 amps, ensuring stable operation at different speeds, and a power range of 0.8 watts to 9 watts, meeting power requirements of portable fans. The control module 504 monitors the working voltage, current, and power of the fan motor in real time, and adjusts them according to these parameters. The control module 504 can accurately control the speed of the fan motor, with an adjustment range of 15,000-41,000 revolutions per minute. Its speed can also be above 41,000 revolutions per minute, such as 42,000 revolutions per minute or 45,000 revolutions per minute. The drive module 505 converts DC power of 3-4.5 volts into three-phase AC power, and drives the high-speed three-phase motor 53 through inverter technologies. The battery uses two batteries connected in series to provide a stable voltage. The number of pole pairs for the fan is 4, the number of slots is 9, the number of fan blades is 5, and the number of guide vanes/fan blades is 9.

[0536]Specifically, the high-speed three-phase motor 53 can be driven with 3 volts, 3.2 volts, 3.5 volts, 3.7 volts, 4.3 volts or 4.5 volts, suitable for power supply of two batteries connected in series, and a working current range can be 0.25 amps, 0.4 amps, 0.5 amps, 0.6 amps, 0.8 amps, 1.0 amps, 1.2 amps, 1.4 amps, 1.6 amps, or 1.8 amps, ensuring stable operation at different speeds. The power ranges from 1 watt to 8 watts, meeting power requirements of portable fans. The control module 504 measures the working voltage, current, and power of the fan motor in real time, and adjusts them according to these parameters. The control module 504 can accurately control the speed of the fan motor, with an adjustment range of 15000 to 41000 revolutions per minute. The drive module 505 can convert DC power of 3 volts, 3.2 volts, 3.5 volts, 3.7 volts, 4.3V or 4.5V DC into three-phase AC power, and drive the high-speed three-phase motor 53 through inverter technologies. The batteries are connected in series with single or double cells to provide a stable voltage. The number of pole pairs of the fan is 4, the number of the slots is 9, the number of the fan blades is 9, and the number of the guide vanes/impellers is 9.

[0537]The high-speed three-phase motor 53 adopts FOC (Field Oriented Control) control, also known as vector control, which is a variable frequency drive control method for three-phase brushless DC motors by controlling an amplitude and a frequency of an output voltage of a frequency converter.

[0538]FOC control divides a sine wave stator current into a magnetic field component current parallel to the magnetic field and a torque component current perpendicular to the magnetic field, namely a direct axis current and a quadrature axis current, and controls the two currents to achieve precise control of motor speed and steering.

[0539]By adopting FOC control, the high-frequency vibration generated during the operation of high-speed three-phase motor 53 can be reduced. Therefore, by accurately controlling the control module 504, the drive module 505, and the high-speed three-phase motor 53, the vibration frequency of the fan motor 50 can be effectively adjusted to prevent human ears from capturing high-frequency sounds, thereby further improving the comfort of the neck fan.

[0540]The present disclosure provides a neck fan, which includes a fan, a ventilation channel, and a first air inlet and a first air outlet connected to the ventilation channel. The fan is arranged between the first air inlet and the first air outlet, and a first air outlet is formed on the ventilation channel. The fan operates and forms an airflow between the first air inlet and the first air outlet; The working voltage of the high-speed three-phase motor is 3-6 volts, and the working current of the high-speed three-phase motor is 0.25-8 A. The rated power of the high-speed three-phase motor is 1-10 watts, which limits the type of the fan motor and is conducive to providing high-speed airflow for the neck fan. At the same time, the neck fan further limits the wind speed of the airflow out from the first air outlet to more than 4 meters per second, in order to achieve high-speed air output of the neck fan, reduce the influence of the surrounding environment and usage environment on the air output effect, and further improve the user experience.

[0541]The above is only a better embodiment of this application and is not intended to limit this application, and any modifications, equivalent substitutions and improvements made within the principles of this application shall be included in the scope of protection of this application.