HEAT EXCHANGER AND HEAT EXCHANGE SYSTEM

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]This application is a continuation of international patent application No. PCT/CN2025/105834, filed on Jun. 30, 2025, which itself claims priority to Chinese patent application No. 202422443952.2, filed on Oct. 9, 2024, and titled “HEAT EXCHANGER AND HEAT EXCHANGE SYSTEM”, and Chinese patent application No. 202422437661.2, filed on Oct. 9, 2024, and titled “HEAT EXCHANGER AND HEAT EXCHANGE SYSTEM”, the contents of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

[0002]The present disclosure relates to the field of heat exchange device, and in particular, to a heat exchanger and a heat exchange system.

BACKGROUND

[0003]Dual-loop system, variable load control, and multi-fluid heat dissipation are key directions and approaches for enhancing energy efficiency of refrigeration system. The dual-loop refrigeration systems are widely used in plurality of sectors, including residential, commercial, and industrial cooling.

[0004]In related art, a three-medium microchannel heat exchanger includes two heat exchange units. Each of the two heat exchange units contains a plurality of flat tubes and two collecting pipes. The flat tubes are arranged in a single-pass configuration, in which both ends of the flat tube are in communication with the two collecting pipes, respectively. The flat tubes of the two heat exchange units are staggered along a length direction of the collecting pipe. Currently, in the related art, the flat tubes of one heat exchange unit should be bent to give way to the collecting pipe of the other heat exchange unit. However, a bent flat tube is difficult to process, hindering heat exchanger fabrication, and compromising the overall structural compactness of the heat exchanger.

SUMMARY

[0005]In the present disclosure, a heat exchanger is provided. The heat exchanger has a compact overall structure and is easy to process, and is suitable to be used in a plurality of medium heat exchange situation.

[0006]A heat exchanger is provided in the present disclosure. The heat exchanger includes two heat exchange units, wherein each of the two heat exchange units includes a plurality of heat exchange flat pipes spaced from each other and a collecting pipe in communication with the plurality of heat exchange flat pipes. The plurality of heat exchange flat pipes of the two heat exchange units are alternately arranged, and each of the plurality of heat exchange flat pipes includes a runner reentering along a length of corresponding one of the plurality of heat exchange flat pipes. An inlet of the runner and an outlet of the runner are provided at the same end of the corresponding heat exchange flat pipe. Each of the two heat exchange units includes two collecting pipes in communication with a corresponding inlet of the runner and a corresponding outlet of the runner, and the two collecting pipes of the same heat exchange unit are disposed at two opposite sides of the heat exchanger.

[0007]A heat exchange system is also provided in the present disclosure, which includes the heat exchanger of the present disclosure, wherein the two heat exchange units are configured to introduce heat exchange mediums, respectively, and the heat exchange medium is independently selected from a refrigerant or water.

[0008]Details of one or more embodiments of the present disclosure are presented in the following accompanying drawings and description in order to make other features, purposes and advantages of the present disclosure more concise and understandable.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]In order to better describe and illustrate the embodiments and/or examples of the present disclosure disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered a limitation on the scope of any of the disclosed applications, the embodiments and/or examples currently described, and the best mode of these applications as currently understood.

[0010]FIG. 1 is a structural schematic diagram of a heat exchanger in some embodiments of the present disclosure.

[0011]FIG. 2 is a structural schematic diagram of the heat exchanger in FIG. 1, in which the fins are omitted.

[0012]FIG. 3 is a partial enlarged figure of A portion in FIG. 2.

[0013]FIG. 4 is a schematic diagram showing pipe sizes of connector tubes of the heat exchanger in some embodiments of the present disclosure.

[0014]FIG. 5 is a schematic diagram showing matching between the plurality of unit tubes in some embodiments of the present disclosure.

[0015]FIG. 6 is an enlarged diagram of the unit tubes and intermedium tubes in FIG. 5.

[0016]FIG. 7 is an axonometric view of a heat exchanger in some embodiments of the present disclosure.

[0017]FIG. 8 is a front view of a heat exchanger in some embodiments of the present disclosure.

[0018]FIG. 9 is an assembly drawing of a first heat exchange flat pipe, a first inlet pipe and a first outlet pipe in an embodiment of the present disclosure.

[0019]FIG. 10 is an assembly drawing of a second heat exchange flat pipe, a second inlet pipe and a second outlet pipe in an embodiment of the present disclosure.

[0020]FIG. 11 is a partial sectional view of a heat exchanger along an axis of the first inlet pipe in some embodiments of the present disclosure.

[0021]FIG. 12 is a schematic diagram of a heat exchange system in some embodiments of the present disclosure.

[0022]FIG. 13 is a schematic diagram of a heat exchange system in some embodiments of the present disclosure.

[0023]In the figures, 1 represents a heat exchange system; 2 represents a heat exchanger; 100 represents a heat exchange flat pipe; 110 represents a heat exchange unit, 1201 represents an inlet, and 1202 represents an outlet, 101 represents a first heat exchange unit; 102 represents a second heat exchange unit; 10 represents a heat exchange part; 11 represents a first heat exchange flat pipe; 111 represents a first runner; 1111 represents a first microchannel; 112 represents a main body; 113 represents an inlet connection portion; 114 represents an outlet connection portion; 12 represents a second heat exchange flat pipe; 121 represents a second runner second runner; 1211 represents a second microchannel; 200 represents a collecting pipe; 210 represents an inlet pipe; 210a represents a first inlet pipe; 210b represents a second inlet pipe; 220 represents an outlet pipe; 220a represents a first outlet pipe; 220b represents a second outlet pipe; 230 represents a connector tube; 230a represents a first connector tube; 230b represents a second connector tube; 230c represents a third connector tube; 230d represents a fourth connector tube; 240 represents a unit tube; 241 represents an insertion groove; 242 represents a first reduced size portion; 243 represents a first section; 244 represents a second section; 250 represents an intermedium tube; 251 represents a second reduced size portion; 300 represents a fin; 400 represents a compressor; 500 represents a throttling component; and 600 represents a globe valve.

DETAILED DESCRIPTION

[0024]In order to make the above objects, features and advantages of the present disclosure more obvious and understandable, specific embodiments of the present closure will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure is capable of being implemented in many other ways different from those described herein, and those skilled in the art may make similar improvements without violating the connotations of the present disclosure, and thus the present disclosure is not limited by the specific embodiments disclosed below.

[0025]It is noted that when a component is said to be “fixed to” or “disposed on” another component, it may be directly on the other component or there may be a centred component. When a component is said to be “connected” to another component, it may be directly connected to the other component or there may be both centred components. The terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in the specification of the present disclosure are for illustrative purposes only and are not meant to be exclusive.

[0026]In addition, the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined with “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present disclosure, “a plurality of” means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027]In the present disclosure, unless otherwise expressly specified and limited, the first feature “on” or “under” the second feature may be that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, the first feature being “above”, “on” or “upon” the second feature may mean that the first feature is directly above or diagonally above the second feature, or it may simply mean that the first feature is horizontally higher than the second feature (optionally, the first feature is horizontally higher than the second feature when the features are in operation or in a certain angle of view). The first feature being “below”, “under” or “beneath” the second feature may be that the first feature is directly below or diagonally below the second feature, or it may simply mean that the first feature is horizontally lower than the second feature (optionally, the first feature is horizontally lower than the second feature when the features are in operation or in a certain angle of view).

[0028]Unless otherwise defined, all technical and scientific terms used in the specification of the present disclosure have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. Terms used in the specification of the present disclosure are used only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term “and/or” as used in the specification of the present disclosure includes any and all combinations of one or more of the relevant listed items.

[0029]Referring to FIGS. 1 to 3, a heat exchanger 2 is provided in some embodiments of the present disclosure. The heat exchanger 2 includes two heat exchange units 110. The two heat exchange units 110 are independently configured as an evaporator or a condenser to form a dual-loop system. In some embodiments, two different refrigerants can be introduced into the two heat exchange units 110, a coolant is introduced into one of the two heat exchange units 110, and a heating medium can be introduced into one of the two heat exchange units 110. The corresponding heat exchange unit can be configured as an evaporator, and the corresponding heat exchange unit can be configured as a condenser. In some embodiments, the same refrigerant can be introduced into the two heat exchange units 110, and a heating medium is introduced into the two heat exchange units 110. The corresponding heat exchange units 110 can be configured as condensers. In some embodiments, the same refrigerant can be introduced into the two heat exchange units 110, and a coolant is introduced into the two heat exchange units 110 (the corresponding heat exchange units 110 are configured as evaporators).

[0030]Each of the two heat exchange units 110 includes a plurality of heat exchange flat pipes 100 spaced from each other and a collecting pipe 200 in communication with the plurality of heat exchange flat pipes 100, and the plurality of heat exchange flat pipes 100 of the two heat exchange units 110 are alternately arranged. The plurality of heat exchange flat pipes 100 can be the heat exchange flat pipes in the related art. In some embodiments, the heat exchange flat pipe 100 is plate-shaped as a whole, a length direction of the heat exchange unit 110 is represented by arrow L in the figures, and the width direction of the heat exchange unit 110 is represented by arrow W in the figures.

[0031]The heat exchange flat pipe 100 can include a first plate body and a second plate body clamped to each other, and a fluid channel is enclosed between the first plate body and the second plate body. In some embodiments, the first plate body can include a first main body and a first protrusion, and the first protrusion protrudes from the first main body and form a first runner 111 or a second runner 121 with the second main body. In some embodiments, the second plate body can include a second main body and a second protrusion, and the second protrusion protrudes from the second main body and form a first runner 111 or a second runner 121 with the first main body. In some embodiments, the first plate body can include a first protrusion, the second plate body can include a second protrusion, and the first protrusion and the second protrusion can form a first runner or 111 a second runner 121. The heat exchange flat pipes 100 with the above structure can be used in a microplate heat exchanger, and thermal coupling can be formed between adjacent heat exchange flat pipes 100 via a fin 300. In combination with the air flow flowing through the fin 300, the heat exchanger 2 can be configured for exchanging heat of three mediums.

[0032]In some embodiments, sectional areas of the plurality of first protrusions are different, and/or, sectional areas of plurality of second protrusions are different, so that sectional areas of the plurality of first runners defined by the plurality of first protrusions are different, and/or, sectional areas of the plurality of second runners defined by the plurality of second protrusions are different, improving disturbance of the refrigerant in the first runner or the second runner and improving the heat exchange efficiency.

[0033]The heat exchange flat pipe 100 includes a runner 120 reentering along a length of the corresponding heat exchange flat pipe, and an inlet 1201 of the runner 120 and an outlet 1202 of the runner 120 are provided at the same end of the heat exchange flat pipe 100. Each of the two heat exchange units 110 includes two collecting pipes 200, and the two collecting pipes are disposed at the same side of the heat exchange flat pipe 100 along a length direction of the heat exchange flat pipe 100. The two collecting pipes 200 are configured for communicating a corresponding inlet 1201 of the runner 120 and a corresponding outlet 1202 of the runner 120, and the two collecting pipes 200 of the same heat exchange unit 110 are disposed at two opposite sides of the heat exchanger.

[0034]A reasonable arrangement of the collecting pipes 200 can further reduce spatial interference and improve the compactness of the overall structure of the heat exchanger 2. In some embodiments, the collecting pipe 200 can be separately formed and assembly together. The two collecting pipe 200 can include a plurality of unit tubes 240 in communication with each other along the length direction of the collecting pipe 200. A side wall of each of the plurality of the unit tubes 240 can be provided with an insertion groove 241, and the plurality of heat exchange flat pipes in the same heat exchange unit 110 are in communication with a corresponding unit tube 240 via the insertion groove 240.

[0035]In one heat exchange unit, one of the two collecting pipe 200 is configured as an inlet pipe 210, and the other one of the two collecting pipes 200 is configured as an outlet pipe 220. An entrance and an exist port in communication with the internal runners are provided at a side of the heat exchange flat pipe along the length direction of the heat exchange pipe 100. Referring to FIG. 3, the dotted line arrow show a direction of the heating medium flowing through the entrance and the exist port into the internal runner. By arranging the exist port and the entrance at the same side of the heat exchange flat pipe, the heat exchange efficiency of the heat exchanger can be improved. A size of the heat exchange flat pipe 100 decreases at the entrance and the exist port to form an insertion portion, and the insertion portion is hermetically snap-fitted with the insertion groove 241 of the corresponding unit tube 240. In some embodiments, the insertion portion can be fixed to the insertion groove 241 by method of brazing.

[0036]In the present disclosure, the collecting pipe 200 can include a plurality of unit tubes 240, and a length of the unit tube 240 can be adjusted according to a distance between adjacent two heat exchange flat pipes 100. The entrance and the exist port of the heat exchange flat pipe 100 are disposed at the same side of the heat exchange flat pipe 100, and the inlet pipe 210 and the outlet pipe 220 at the such side are parallelly disposed, so that the entire structure of the heat exchanger is more compact and the heat exchange efficiency can be improved.

[0037]Along a width direction of the heat exchange flat pipe 100, the two collecting pipes 200 of the same heat exchange unit 110 can be arranged in a following way: axes of the two collecting pipes 200 align with each other along the length direction of the heat exchange flat pipes 100; optionally, axes of the two collecting pipes 200 stagger with each other along the length direction of the heat exchange flat pipes 100, and side walls of the two collecting pipes 200 adjacent to the heat exchange flat pipe 100 are level with each other. In some embodiments, the two collecting pipes 200 can include a first side and a second side away from each other, and the first side and the second side are located within a width boundary of the heat exchange flat pipe 100. In some embodiments, a longest distance between the two collecting pipes 200 of the same heat exchange flat pipe 100 along a width direction of the plurality of heat exchange flat pipes 100 is defined as w, the width of one of the plurality of heat exchange flat pipes is defined as W₁, and the longest distance w between the two collecting pipes of the same heat exchange unit 110 along the width direction of the plurality of heat exchange flat pipes and the width W₁ of one of the plurality of heat exchange flat pipes satisfy a following formula: W₁>w. In this way, the entire structure of the heat exchanger 2 is compact and more uniform, which is convenient to be stacked together to store or transport and fit with peripheral device of in the environment.

[0038]In some embodiments, axes of the two collecting pipes 200 of the same heat exchange unit 110 are staggered with each other along a length direction of the plurality of heat exchange flat pipes 100, and the longest distance w between the two collecting pipes 200 of the same heat exchange unit 110 along the width direction of the plurality of heat exchange flat pipes 100 and the width W₁ of one of the plurality of heat exchange flat pipes 100 satisfy a following formula: 0.75≤w/W₁≤0.95.

[0039]Referring to FIG. 4, when the two collecting pipes 200 are staggered with each other, the axes of the two collecting pipes 200 are staggered with each other along the width direction of the heat exchange flat pipe 100 due to different pipe sizes of the two collecting pipes 200. Thus, the two collecting pipes 200 can be more compact along the width direction of the heat exchange flat pipe 100 according to requirements of size, so that the entire structure of the heat exchanger 2 can be more compact and assembly of the two collecting pipes 200 can be more easily.

[0040]For heat exchangers 2 of different specifications, the longest distance w between the two collecting pipes 200 of the same heat exchange unit 110 along the width direction of the heat exchange flat pipes 100 and the width W₁ of the heat exchange flat pipes 100 can be set proportionally. When the pipe size of each of the collecting pipes 200 decreases, the width W₁ of the heat exchange flat pipes 100 synchronously decreases. As a whole, a sum of pipe sizes of the two collecting pipes 200 is smaller than the width W₁ of the heat exchange flat pipes 100, so that the two collecting pipes 200 may not protrude from the heat exchange flat pipe 100 along the width direction of the heat exchange flat pipe 100.

[0041]In order to connect with an external pipeline and an external apparatus to form the heat exchange system, each of the two collecting pipes 200, and all the connector tubes 230 in the heat exchanger 2 are disposed at the same side of the heat exchanger 2. The entire heat exchanger 2 can include four connector tubes 230, and the connector tubes 230 in the two heat exchange units 110 can bend towards each other. In this way, the connector tubes 230 may not protrude from the collecting pipes 200 along the length direction of the heat exchange flat pipe 100, which may facilitate pre-assembly of the connector tubes 230 and the external of the heat exchanger 2 may be uniform and occupy a smaller space.

[0042]When the heat exchanger 2 is configured as a three-medium heat exchanger 2, the configuration of the heat exchange unit 110 should take a direction of the airflow at the fin 300 into consideration. In some embodiments, along the width direction of the heat exchange flat pipe 100, a side of the heat exchanger 2 is disposed at a windward side an upstream of an airflow, and the airflow flows from the windward side towards the other side of the fin 300.

[0043]When the heat exchange unit 110 is configured as the evaporator, a pipe size of the inlet pipe 210 is smaller than a pipe size of the outlet pipe 220. That is, a pipe size of the inlet pipe 210 is small. Since the heat exchange unit 110 is configured as an evaporator, a specific volume of the medium in the inlet pipe 210 is less than that in the outlet pipe 220.

[0044]When the heat exchange unit 110 is configured as the condenser, a pipe size of the inlet pipe 210 is greater than a pipe size of the outlet pipe 220. That is, a pipe size of the inlet pipe 210 is greater. Since the heat exchange unit 110 is configured as a condenser, a specific volume of the medium in the inlet pipe 210 is greater than that in the outlet pipe 220.

[0045]Referring to FIG. 4, in some embodiments, a size of the collecting pipe 200 and a size of the connector tube 230 is further optimized. In some embodiments, the heat exchange unit 110 can include a first outlet pipe 220a, and a pipe size of the first outlet pipe 220a is defined as D1; and the heat exchange unit 110 can include a first inlet pipe 210a, and a pipe size of the first inlet pipe 210a is defined as D2. When the heat exchange unit 110 is configured as a condenser, the pipe size of the first inlet pipe 210a D2 is greater than the pipe size D1 of the first outlet pipe 220a, so as to meet requirements of specific volume change of refrigerant, equilibrate heat exchange and the pressure drop. Similarly, when the heat exchange unit 110 is configured as a evaporator, the pipe size of the first inlet pipe 210a D2 is smaller than the pipe size D1 of the first outlet pipe 220a. The pipe size can be an inner size of a pipe; and when thicknesses of the pipes are the same or almost the same, the pipe size can be an external size of a pipe.

[0046]In another heat exchange unit 110, the heat exchange unit 110 can include a second inlet pipe 210b, and a pipe size of the second inlet pipe 210b is defined as D3; and the heat exchange unit 110 can include a second outlet pipe 220b, and a pipe size of the second outlet pipe 220b is defined as D4. When the heat exchange unit 110 is configured as an evaporator, the pipe size of the second outlet pipe 220b D4 is greater than the pipe size D3 of the second inlet pipe 210b. Similarly, when the heat exchange unit 110 is configured as a condenser, the pipe size of the second outlet pipe 220b D4 is smaller than the pipe size D3 of the second inlet pipe 210b.

[0047]Referring to FIG. 4, the relationship between the collecting pipe and the connector tube is shown hereinafter. The first outlet pipe 220a is in communication with the first connector tube 230a, a pipe size of the first connector tube 230a is defined as OD1; the first inlet pipe 210a is in communication with a second connector tube 230b, and a pipe size of the second connector tube 230b is defined as OD2; the second inlet pipe 210b is in communication with a third connector tube 230c, and a pipe size of the third connector tube 230c is defined as OD3; and a second outlet pipe 220b is in communication with a fourth connector tube 230d, and a pipe size of the fourth connector tube 230d is defined as OD4. The pipe size OD1 of the first connector tube 230a and the pipe size OD2 of the second connector tube 230b, can satisfy a following formula: OD1<OD2≤1.56×OD1. Since the pipe size OD1 of the first connector tube 230b is small, the heat exchange medium can be uniformly divided. Since the pipe size OD1 of the first connector tube 230a is smaller than the pipe size OD2 of the second connector tube 230b, change in specific volume of the heat exchange medium and equilibrium of heat exchange and pressure drop can be satisfied. The pipe size OD2 of the second connector tube 230b should not be too great, or flowing out of the heat exchange medium will be affected. Similarly, the pipe size OD3 of the third connector tube 230c and the pipe size OD4 of the fourth connector tube 230d can satisfy a following formula: OD3<OD4≤1.56×OD3.

[0048]When the heat exchange unit 110 is configured as an evaporator, the pipe size of the second inlet pipe 210b and the pipe size of the third connector tube 230c should not be too great, so as to ensure that the heat exchange medium is uniformly divided.

[0049]The collecting pipes 200 can be an integral structure or separately provided and assembled together. When the collecting pipes 200 are separately provided, adjacent two unit tubes 240 are directly fitted in an insertion manner. In some embodiments, referring to FIG. 5 and FIG. 6, an intermedium tube 250 is provided between adjacent two unit tubes 240 and the adjacent two unit tubes 240 are in communication with each other via the intermedium tube 250.

[0050]One of a unit tube 240 and an adjacent intermedium tube 250 is provided with a reduced size portion, and can be in insertion fit with the other one of the unit tube 240 and the adjacent intermedium tube 250. In some embodiments, an end of the unit tube 240 is provided with a first reduced size portion 242, and is in insertion fitted with an adjacent intermedium tube 250 via the first reduced size portion 242. Similarly, in some embodiments, an end of an intermedium tube 250 is provided with a second reduced size portion 251, and is in insertion fitted with an adjacent unit tube 240 via the second reduced size portion 251. The fitted portion between the unit tube and the intermedium tube may be smoothly transited or transited by a step.

[0051]In some embodiments, the intermedium tube 250 is provided as a transition, so that not only the thickness change of the heat exchange flat pipe and distance change between the heat exchange flat pipes can be adjusted and adapted, but also error accumulation caused by processing and assembly can be avoided and deformation and inner stress generated in the subsequent welding process can be reduced, thereby further improving sealing performance of the heat exchanger.

[0052]In some embodiments, a length of the unit tube 240 and a length of the intermedium tube 250 along the axis of the unit are defined. In some embodiments, along a length direction L of the collecting pipes 200, a length of the unit tube 240 is defined as L1; and a length of the intermedium tube 250 is defined as L2, and the length L₁ of the unit tube 240 and the length L2 of the intermedium tube 250 can satisfy a following formula: 1:2≤L₁:L₂≤1:0.5. In some embodiments, the length L₁ of the unit tube 240 and the length L2 of the intermedium tube 250 can satisfy a following formula: L1:L2=1:1.

[0053]Thus, the heat exchanger 2 of the present disclosure is further designed, the uniformity of the structure of the heat exchanger 2 is improved and the assembly efficiency is improved, and the heat exchanger 2 can meet different requirements.

[0054]In some embodiments, referring to FIGS. 7 to 10, the first heat exchange flat pipe 11 can include a first runner 111 reentering along a length direction of the first heat exchange flat pipe 11, and an inlet of the first runner 111 and an outlet of the first runner 111 can be provided at a first side of the heat exchange unit 110; each of the second heat exchange flat pipes 12 can include a second runner 121 reentering along a length direction of the second heat exchange flat pipes 12, and an inlet of the second runner 121 and an outlet of the second runner 121 are provided at a second side of the heat exchange unit 110, wherein the plurality of first heat exchange flat pipes 11 and the plurality of second heat exchange flat pipes 12 can be alternately arranged along a thickness direction thereof, and each of the plurality of first heat exchange flat pipes 11 and corresponding one of the plurality of second heat exchange flat pipes 12 can be in contact with each other along the thickness directions thereof to form a heat exchange part 10. The first side of the heat exchange unit 110 and the second side of the heat exchange unit 110 are opposite to each other along the length direction of the heat exchange unit 110. The first side of the heat exchange unit 110 is shown as A in FIG. 8, and the second side of the heat exchange unit 110 is shown as B in FIG. 8.

[0055]Since each of the plurality of first heat exchange flat pipes 11 and corresponding one of the plurality of second heat exchange flat pipes 12 can be in contact with each other along the thickness directions thereof and form a contact heat exchange, heat exchange efficiency between the medium in the first heat exchange flat pipe 11 and the medium in the second heat exchange flat pipe 12 can be improved. In addition, since the first runner 111 can reenter along the length direction of the first heat exchange flat pipe 11 and an inlet of the first runner 111 and an outlet of the first runner 111 can be provided at the first side of the two heat exchange units 110, a flow path of the medium in the first heat exchange flat pipe 11 can be lengthened. Similarly, since the second runner 121 can reenter along the length direction of the second heat exchange flat pipe 12 and an inlet of the second runner 121 and an outlet of the second runner 121 can be provided at the second side of the two heat exchange units 110, a flow path of the medium in the second heat exchange flat pipe 12 can be lengthened. At the same time, a double-row heat exchanger can be obtained without bending the heat exchange unit 110. On the premise that the heat exchange amount are the same, a length of the heat exchanger 2 will not lengthened. Thus, the mounting space of the heat exchanger 2 can be not limited, and the processing cost can be lowered. The medium flowing in the first heat exchanger flat pipe 11 can be the same as the medium flowing in the second heat exchange flat pipe 12, optionally, the medium flowing in the first heat exchanger flat pipe 11 can be different from the medium flowing in the second heat exchange flat pipe 12.

[0056]In some embodiments, the first runner 111 in the first heat exchange flat pipe 11 can be U-shaped, and the second runner 121 in the second exchange flat pipe 12 can be U-shaped.

[0057]In some embodiments, a cross sectional area of the first runner 111 in the thickness direction thereof can be different from a cross sectional area of the second runner 121 in the thickness direction thereof. In other words, a flowing area of the first runner 111 can be different from that of the second runner 121.

[0058]In this way, the heat exchanger 2 can be used in situations that requirements of heat dissipation of the first heat exchange unit 101 and the second heat exchange unit 102 are different. In some embodiments, when the first heat exchange unit 101 is configured as a condenser and the second heat exchange unit 102 is configured as an evaporator, the cross sectional area of the first runner 111 along the thickness direction thereof is greater than that of the second runner 121 due to a greater heat exchange amount is required by the condenser, thereby facilitating heat recovery. Similarly, when the first heat exchange unit 101 is configured as an evaporator and the second heat exchange unit 102 is configured as a condenser, the cross sectional area of the first runner 111 along the thickness direction thereof is smaller than that of the second runner 121. In some embodiments, the heat dissipation amount of the first heat exchange unit 101 an the heat dissipation amount of the second heat exchange unit 102 are the same, a flowing area of the first runner 111 can be the same as that of the second runner 121.

[0059]In some embodiments, the flowing area of the first runner 111 and the flowing area of the second runner 121 can be different by providing different sizes of the first heat exchange flat pipe 11 and the second heat exchange flat pipe 12. In some embodiments, a width of the first heat exchange flat pipe 11 can be defined as W₂, a width of the second heat exchange flat pipe 12 is defined as W₃, and the width W₂ of the first heat exchange flat pipe 11 can be different from the width W₃ of the second heat exchange flat pipe 12; optionally, a thickness of the first heat exchange flat pipe 11 can be defined as h₁, and a thickness of the second heat exchange flat pipe 12 can be defined as h₂, the thickness h₁ of the first heat exchange flat pipe 11 can be different from the thickness h₂ of the second heat exchange flat pipe 12. In some embodiments, the width W₂ of the first heat exchange flat pipe 11 can be different from the width W₃ of the second heat exchange flat pipe 12, and the thickness h₁ of the first heat exchange flat pipe 11 can be different from the thickness h₂ of the second heat exchange flat pipe 12. The width W₂ of the first heat exchange flat pipe 11 can be greater than or equal to 26 mm, and less than or equal to 55 mm; and the width W₃ of the second heat exchange flat pipe 12 can be greater than or equal to 26 mm, and less than or equal to 55 mm. The thickness h₁ of the first heat exchange flat pipe 11 can be greater than or equal to 1.2 mm, and less than or equal to 2.8 mm, and the thickness h₂ of the second heat exchange flat pipe 12 can be greater than or equal to 1.2 mm, and less than or equal to 2.8 mm. When the width W₂ of the first heat exchange flat pipe 11 and the width W₃ of the second heat exchange flat pipe 12 are too great, the processing and welding may be harder. When the width W₂ of the first heat exchange flat pipe 11 and the width W₃ of the second heat exchange flat pipe 12 are too small, the first runner 111 and the second runner 121 are too narrow and the flow resistance may increase. When the thickness h₁ of the first heat exchange flat pipe 11 and the thickness h₂ of the second heat exchange flat pipe 12 are too thick, heat exchange efficiency between the first heat exchange flat pipe 11 and the second heat exchange flat pipe 12 may become worse. When the thickness h₁ of the first heat exchange flat pipe 11 and the thickness h₂ of the second heat exchange flat pipe 12 are too thin, a loading capacity of the first heat exchange flat pipe 11 and a loading capacity of the second heat exchange flat pipe 12 may be insufficient.

[0060]In some embodiments, the first runner 111 may include a plurality of first microchannels 1111 in parallel connection with each other, the second runner 121 may include a plurality of second microchannels 1211 in parallel connection with each other, the number of the plurality of first microchannels 1111 may be defined as N, and the number of the plurality of second microchannels 1211 may be defined as M, an area of a cross section of each of the plurality of first microchannels 1111 may be equal to that of each of the plurality of second microchannels 1211, and N may be not equal to M. The number N of the plurality of first microchannels and the number M of the plurality of second microchannels satisfy with a following formula: 6≤N≤18, and 6≤M≤18. In this way, the flowing area of the first runner 111 can be different from that of the second runner 121.

[0061]In some embodiments, the first runner 111 may include a plurality of first microchannels 1111 in parallel connection with each other, the second runner 121 may include a plurality of second microchannels 1211 in parallel connection with each other, the number of the plurality of first microchannels 1111 may be defined as N, and the number of the plurality of second microchannels 1211 may be defined as M, an area of a cross section of each of the plurality of first microchannels 1111 may be different from that of each of the plurality of second microchannels 1211, and N may be equal to M. The number N of the plurality of first microchannels and the number M of the plurality of second microchannels satisfy with a following formula: 6≤N≤18, and 6≤M≤18. In this way, the flowing area of the first runner 111 can be different from that of the second runner 121.

[0062]In some embodiments, the plurality of first microchannels 1111 may be arranged along the width direction of the first heat exchange flat pipes 11. The wider the first heat exchange flat pipe 11 is, the greater the number of the first micro channels 1111 is. The plurality of second microchannels 1211 may be arranged along the width direction of the second heat exchange flat pipes 12. The wider the second heat exchange flat pipe 12 is, the greater the number of the second microchannels 1211 is.

[0063]Each of the plurality of first heat exchange flat pipes 11 may include a main body 112 of the first heat exchange flat pipe 11, an inlet connection portion 113 of the first heat exchange flat pipe 11 and an outlet connection portion 114 of the first heat exchange flat pipe 11, and the inlet connection portion 113 of the first heat exchange flat pipe 11 and the outlet connection portion 114 of the first heat exchange flat pipe 11 may be disposed at the same end of the first heat exchange flat pipe 11. Each of the plurality of second heat exchange flat pipes 12 may include a main body 112 of the second heat exchange flat pipe 12, an inlet connection portion 113 of the second heat exchange flat pipe 12 and an outlet connection portion 114 of the second heat exchange flat pipe 12, and the inlet connection portion 113 of the second heat exchange flat pipe 12 and the outlet connection portion 114 of the second heat exchange flat pipe 12 may be disposed at the same end of the second heat exchange flat pipe 12. In each of the plurality of heat exchange parts 10, the main body 112 of the first heat exchange flat pipe 11 may be stacked with and welded to the main body 112 of the second heat exchange flat pipe 12. The inlet connection portion 113 of the first heat exchange flat pipe 11 may be configured as an inlet of the first runner 111, and the inlet connection portion 113 of the second heat exchange flat pipe 12 may be configured as an outlet of the second runner 121. The outlet connection portion 114 of the first heat exchange flat pipe 11 may be configured as an outlet of the first runner 111, and the outlet connection portion 114 of the second heat exchange flat pipe 12 may be configured as an outlet of the second runner 121.

[0064]The inlet connection portion 113 and the outlet connection portion 114 may be flat-shaped. Along a direction away from the main body 112, a cross sectional area of the inlet connection portion 113 and a cross sectional area of the outlet connection portion 114 may gradually decrease. Since the cross sectional area of the inlet connection portion 113 gradually decreases, pressure drop of the medium in the runner can be lowered, and separation of the medium can be facilitated. Since the cross sectional area of the outlet connection portion 114 gradually decreases, the flow rate of the medium can be increased and the heat exchange efficiency can be increased.

[0065]Furthermore, the plurality of heat exchange parts 10 may be arranged along a thickness direction of the first heat exchange flat pipe 11, and a fin 20 can be disposed between adjacent two heat exchange parts 10. The fin 20 is configured for improving the heat exchange area.

[0066]In some embodiments, along a length direction of the heat exchange part 10, the fin 20 is wave-shaped; besides, two opposite sides of the fin 20 are welded to the adjacent two heat exchange parts 10, respectively. A process for assembling the heat exchanger 2 includes following steps: in each of the heat exchange part 10, the heat exchange flat pipe 11 is disposed in contact with the second heat exchange flat pipe, and the fin 20 is disposed between adjacent two heat exchange parts 10; then the heat exchange part 10 and the fin 20 can be subjected to a simultaneously furnace welding process.

[0067]The heat exchanger 2 may include a first inlet pipe 210a, a first outlet pipe 220a, a second inlet pipe 210b and a second outlet pipe 220b, and the first inlet pipe 210a, the first outlet pipe 220a, the second inlet pipe 210b and the second outlet pipe 220b may all extend along the thickness direction of the heat exchange part 10. In addition, in each of the heat exchange part 10, an inlet of the first runner 111 may be in communication with the first inlet pipe 210a, an outlet of the first runner 111 may be in communication with the first outlet pipe 220a, an inlet of the second runner 121 may be in communication with the second inlet pipe 210b, and an outlet of the second runner 121 may be in communication with the second outlet pipe 220b. In addition, along the length direction of the heat exchange part 10, the first inlet pipe 210a and the first outlet pipe 220a may be provided at the first side of the two heat exchange units 110, and the first inlet pipe 210a and the first outlet pipe 220a may be arranged along the width direction of the heat exchange part 10 in a staggered manner. In this way, it is more convenient to assemble the first inlet pipe 210a and the first outlet pipe 220a, and meanwhile, a space occupied by the heat exchanger part 10 in the width direction thereof is reduced, thereby making the entire structure of the heat exchanger 2 more compact. The second inlet pipe 210b and the second outlet pipe 220b are disposed at the second side of the two heat exchange units 110, and the second inlet pipe 210b and the second outlet pipe 220b are arranged in a staggered manner along the width direction of the heat exchanger part 10. Thus, it is more convenient to assemble the second inlet pipe 210b and the second outlet pipe 220b, and meanwhile, a space occupied by the heat exchanger part 10 in the width direction thereof is reduced, thereby making the entire structure of the heat exchanger 2 more compact.

[0068]The plurality of first heat exchange flat pipes 11, the first inlet pipe 210a and the first outlet pipe 220a may be connected with each other and form a first heat exchange unit 101, and the plurality of the second heat exchange flat pipes 12, the second inlet pipe 210b and the second outlet pipe 220b may be connected with each other and form a second heat exchange unit 102.

[0069]In some embodiments, the first inlet pipe 210a, the first outlet pipe 220a, the second inlet pipe 210b and the second outlet pipe 220b may be configured to include a plurality of unit tubes 240, respectively. Referring to FIG. 11, the first inlet pipe 210a is shown as an example of a structure of the unit tube 240. The plurality of the unit tubes 240 may be excessively stacked together. Each of the plurality of the unit tube 240 may include a first section 243 and a second section 244. A pipe size of the first section 243 is smaller than a pipe size of the second section 244, so that the first section 243 of the unit tube 240 may extend into a second section 244 of an adjacent unit tube 240.

[0070]The unit tube 240 of the first inlet pipe 210a, the unit tube 240 of the first outlet pipe 220a, the unit tube 240 of the second inlet pipe 210b and the unit tube 240 of the second outlet pipe 220b may be one-to-one matched with each other along the thickness direction of the heat exchange part 10. In addition, the four unit tubes 240 in connection with the same heat exchange part 10 may be located at the same height along the thickness direction of the heat exchange part 10. In this way, the heat exchange part 10 may be conveniently connected to a corresponding unit tube 240. In addition, a requirement of the distance between adjacent two heat exchanger parts 10 may be met by disposing the heat exchange parts 10 on the unit tubes 240 at different heights.

[0071]In some embodiments, in each of the heat exchanger parts 10, the inlet connection portion 113 of the first heat exchange flat pipe 11 may insert into the unit tube 240 of the first inlet pipe 210a, and the outlet connection portion 114 of the first heat exchange flat pipe 11 may insert into the unit tube 240 of the first outlet pipe 220a. The inlet connection portion 113 of the second heat exchange flat pipe 12 may insert into the unit tube 240 of the second inlet pipe 210b, and the outlet connection portion 114 of the second heat exchange flat pipe 12 may insert into the unit tube 240 of the second outlet pipe 220b.

[0072]In some embodiments, the first inlet pipe 210a, the first outlet pipe 220a, the second inlet pipe 210b and the second outlet pipe 220b may be an integral structure.

[0073]Referring to FIG. 7, a thickness of the first heat exchange flat pipe 11 may be defined as h₁, a thickness of the second heat exchange flat pipe 12 may be defined as h₂, and a distance between adjacent two of the plurality of heat exchange parts 10 may be defined as h₃, and the thickness h₁ of the first heat exchange flat pipe 11, the thickness h₂ of the second heat exchange flat pipe 12 and the distance h₃ between adjacent two of the plurality of heat exchange parts 10 may satisfy a following formula: 2.6(h₁+h₂)≤h₃≤5.5(h₁+h₂). When the distance h₃ between adjacent two of the plurality of heat exchange parts 10 is too small, that is, the distance between the adjacent two heat exchanger parts 10 is too small, the unit tubes 240 should be designed short, leading to processing difficulty. When the distance h₃ between adjacent two of the plurality of heat exchange parts 10 is too great, that is, the distance between the adjacent two heat exchanger parts 10 is too great, a height of the fin 20 should be great. Since the heat exchange part 10 and the fin 10 should be simultaneously subjected to the furnace welding process, the heat exchanger 2 may be hard to process due to excessive great height of the fin 20.

[0074]The distance h₃ between adjacent two of the plurality of heat exchange parts 10 may be selected from 2.6(h₁+h₂), 2.65(h₁+h₂), 2.7(h₁+h₂), 3(h₁+h₂), 4(h₁+h₂), 5(h₁+h₂) or 5.5(h₁+h₂). The distance h₃ between adjacent two of the plurality of heat exchange parts 10 may be defined according to actual needs, as long as the distance h₃ between adjacent two of the plurality of heat exchange parts 10 falls within the scope described above.

[0075]A heat exchange system is provided in the present disclosure, and the heat exchange system 1 may include the heat exchanger 2 in any one of the embodiments above.

[0076]In some embodiments, referring to FIG. 12, the heat exchange system 1 may include a compressor 400, a throttling component 500, and two heat exchangers 2. One of the two heat exchangers 2 may be in series connection between an outlet of the compressor 400 and the throttling component 500, and the other one of the two heat exchangers 2 may be in series connection between the throttling component 500 and an inlet of the compressor 500. In addition, in each of the two heat exchangers 2, the first heat exchange unit 101 may be in parallel connection with the second heat exchange unit 102. In some embodiments, the same kind of medium is used in the first heat exchange unit 101 and the second heat exchange unit 102 of each of the heat exchangers 20. When one of the first heat exchange unit 101 and the second heat exchange unit 102 in the two heat exchangers 2 are in operation, the heat exchange system 1 may run at half capacity. When both the first heat exchange unit 101 and the second heat exchange unit 102 of the two heat exchangers 2 are in operation, the heat exchange system may run at full capacity.

[0077]In some embodiments, referring to FIG. 13, when the heat exchange system 1 is configured as an industrial cooling system, the medium in the first heat exchange unit 101 may be a refrigerant, and the medium in the second heat exchange unit 102 may be water. In some embodiments, the heat exchange system 1 may include a compressor 400, a throttling component 500, and two heat exchangers 2. The outlet of the compressor 400, the first heat exchange unit 101 of one of the two heat exchangers 2, the throttling component 500, and the first heat exchange unit 101 of the other heat exchange unit 101 of the two heat exchangers 2 and the inlet of the compressor 400 may be in series connection with each other to form a loop of a refrigerant; and a second heat exchange unit 102 of the heat exchanger 2, the globe valve 600 and the second heat exchange unit 102 of the other heat exchanger 2 may be in communication with each other and configured for cycling of water.

[0078]The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the present disclosure.

[0079]The above-described embodiments are only several implementations of the present disclosure, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present disclosure. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present disclosure, and all fall within the protection scope of the present disclosure. Therefore, the patent protection of the present disclosure shall be defined by the appended claims.