APPLIANCE WITH A CLEAR ICE MAKER AND ICE PRESS

TECHNICAL FIELD

[0001]The present disclosure relates generally to appliances and, more particularly, to an appliance that includes a clear ice maker and an ice press.

BACKGROUND

[0002]Appliances such as refrigerators, coolers, and other kitchen appliances can have built-in ice makers to produce ice. The ice makers are machines that convert water (e.g., tap water) into ice. The ice is normally formed as solid cubes of a prefixed shape, such as a rectangular or crescent shape. Often, the ice is visually cloudy due to impurities such as dissolved minerals and salts in the water used to make the ice. These impurities can significantly alter the taste of drinks containing the ice. The cloudiness of the ice may also be visually unpleasant to consumers.

BRIEF DESCRIPTION OF THE DRAWINGS

[0003]FIG. 1 shows an example of an appliance having an ice maker, a cooled storage container for ice billets, and an ice press according to some aspects of the present disclosure.

[0004]FIG. 2 shows an example of an ice maker according to some aspects of the present disclosure.

[0005]FIG. 3 shows an exploded view of an example of an ice maker according to some aspects of the present disclosure.

[0006]FIG. 4 shows an example of an ice chamber module of an ice maker according to some aspects of the present disclosure.

[0007]FIG. 5 shows an example of an ice maker and a cooled storage container according to some aspects of the present disclosure.

[0008]FIG. 6 shows an example of an ice press with interchangeable molds according to some aspects of the present disclosure.

[0009]FIG. 7 shows an example of a control system associated with an ice maker according to some aspects of the present disclosure.

[0010]FIG. 8 shows a flowchart of an example of an ice production mode according to some aspects of the present disclosure.

[0011]FIG. 9 shows a flowchart of an example of an ice storage mode according to some aspects of the present disclosure.

[0012]FIG. 10 shows a flowchart of an example of an ice harvesting mode according to some aspects of the present disclosure.

DETAILED DESCRIPTION

[0013]Certain aspects and features of the present disclosure relate to an automatic ice maker that can produce large, substantially clear ice pieces, referred to herein as ice billets. The ice maker can include a mold cavity having an open end and a closed end, where the closed end is formed by a cooling plate. The ice maker can produce an ice billet by spraying water into the open end of the mold cavity to accumulate ice on the cooling plate, which is cooled by circulating refrigerant through a cooling tube embedded in the cooling plate. Once the ice billet is ready for harvesting, an electric heater embedded in the cooling plate can be activated to detach the ice billet from the cooling plate. The ice billet can drop by gravity onto a guide ramp, which can transfer the ice billet to a cooled storage compartment. The cooled storage compartment may be kept, for example, at −6° C. (±3° C.).

[0014]Some examples may also involve an ice press that can be used to change a shape of an ice billet. A user can obtain an ice billet from the cooled storage compartment and manually load it into the ice press. The ice press can have one or more removable ice molds and one or more embedded electric heaters. When the ice press is turned on, the electric heaters may maintain the ice press and molds at a temperature of around 55° C., which can reduce the risk of the user burning their fingers and expedite the ice molding process. The ice molds can be removable and interchangeable, to allow consumers to change and combine them according to their drinks or mood. The ice press can be designed to work with different ice molds that produce sizes and shapes of ice, such as spheres, cubes, diamonds, etc.

[0015]The ice maker, cooled storage compartment, and ice press can be attached to an appliance (e.g., a refrigerator appliance) to provide an all-in-one solution for creating, storing, and shaping ice for beverages or other products. The ice maker can be compact and readily interchangeable with conventional domestic ice makers that utilize direct cooling, making it easy to retrofit to existing appliances.

[0016]These illustrative examples are given to introduce the reader to the general subject matter discussed here and are not intended to limit the scope of the disclosed concepts. The following sections describe various additional features and examples with reference to the drawings in which like numerals indicate like elements but, like the illustrative examples, should not be used to limit the present disclosure.

[0017]FIG. 1 shows an example of an appliance 100 having an ice maker 106, a cooled storage container 108 for ice billets 110, and an ice press 104 according to some aspects of the present disclosure. The ice maker 106 can create the ice billets 110 and transfer them into the cooled storage container 108, for example by sliding the ice billets 110 along a guide ramp that extends from the ice maker 106 to the cooled storage container 108. The cooled storage container 108 can be kept at a temperature that is below freezing to prevent the ice billets 110 from melting.

[0018]The cooled storage container 108 may include one or more mechanisms to store, organize, and/or provide access to the ice billets 110. One example of such a mechanism can include a carousel 112 of ice holders 114. The ice holders 114 can include platforms, clamps, and/or other devices for storing the ice billets 110. The ice maker 106 can deposit the ice billets 110 onto the ice holders 114. The carousel 112 can then be rotated (e.g., manually or electrically) to present the ice billets 110 to a user. For instance, a user may press a button of the appliance 100 to operate an electric motor that rotates the carousel 112 around its central axis until an ice holder 114 containing an ice billet 110 is accessible to the user. In other examples, other types of mechanisms may be used to store, organize, and/or provide access to the ice billets 110. For instance, the cooled storage container 108 can include angled storage shelves for storing the ice billets 110. The ice maker can deposit newly formed ice billets to the backs of the shelves using a system of guide ramps. The ice billets can then slide along the angled shelves toward the front, for example as the ice billets in front are removed by the user.

[0019]The ice billets 110 can have a large domed shape that may be unsuitable for some types of drinks. So, the appliance 100 can include the ice press 104 for use in sculpting the ice billets 110 into a desired shape. The final ice shape can be selectively modified by removing and replacing one or more interchangeable molds of the ice press 104. As shown, the ice press 104 can be separate from the ice maker 106. The ice press 104 may be permanently integrated into the appliance 100 or may be removable from the appliance 100 as desired. For instance, the appliance 100 may include a receptacle 116 for housing the ice press 104. When using the ice press 104, the user may maintain the ice press 104 in the receptacle 116 or may selectively remove the ice press 104 from the receptacle (e.g., to place it on a countertop), whichever is easier.

[0020]In this example, the appliance 100 also includes a water dispenser 102. The water dispenser 102 can dispense water (e.g., tap water, filtered water, hot water, and/or carbonated water) into a cup of a user for drinking, cooking, etc. The water dispenser 102 can be separate from the ice maker 106 and the ice press 104.

[0021]In addition to its ice making and storage capabilities, the appliance 100 may be designed to serve other purposes. For instance, the appliance 100 may be a domestic kitchen appliance that is primarily designed for a purpose other than ice making and, thus, its ability to make clear ice can be considered a secondary purpose. As one particular example, the appliance 100 may be a refrigerator with the primary purpose of storing food. Alternatively, the appliance 100 may have the primary purpose of making and storing ice.

[0022]FIG. 2 shows an example of an ice maker 106 according to some aspects of the present disclosure. As shown, the ice maker 106 includes an ice chamber module 202 that includes a cover plate 224 with evaporator fins 206, side walls 222, and a cooling plate 204. The side walls 222 can enclose a mold cavity that may have a dome shape. The mold cavity can be the location in which an ice billet is formed. The mold cavity can be made of any suitable material, such as metal or plastic. The cooling plate 204 can form or be coupled to the top of the mold cavity. The cooling plate 204 may be made of any suitable metal material, such as aluminum or copper. The cover plate 224 can be affixed over top of the cooling plate 204 to help maintain the cooling plate 204 in position, among other things.

[0023]The cooling plate 204 can have a cooling tube 208 embedded therein. The cooling tube 208 is connected to the refrigerant circuit of the appliance to provide cooling capacity. The cooling tube 208 can be clamped between the cooling plate 204 and the cover plate 224 and fins 206. The cover plate 224 and fins 206 can be cooled by direct contact with the cooling tube 208. The fins 206 can serve as an evaporator to cool the isolated compartment air next to the mold cavity, keeping the ice from melting.

[0024]The cooling plate 204 can also have an electric heater 210 embedded therein. The electric heater 210 can be an electric defrost heater. The electric heater 210 is connected to an electrical circuit that is operable to heat the cooling plate 204, which can melt the ice billet 212 and thereby detach the ice billet 212 formed in the mold cavity from the cooling plate 204. The ice billet 212 can then drop, due to gravity, onto a guide ramp 214 that can extend to a separate storage container for storing the ice billet.

[0025]In order to make an ice billet 212, water is pumped into a water tank 216 from the appliance. A pump 218 is used to direct water from the water tank 216 to a water outlet referred to herein as nozzle 220, which is positioned below the mold cavity. The nozzle 220 sprays the water upwardly through the bottom opening of the mold cavity, so that ice accumulates in the mold cavity. The ice can accumulate in layers, for example starting on the cooling plate 204 and extending downward, until an ice billet 212 is formed. Excess water falls out of the mold cavity and back to the water tank 216. This flow of water, and lack of pressurization, provide an even flow of water to the mold cavity. Ice accumulates on the cooling plate 204 while impurities are washed away, resulting in formation of a clear ice billet 212.

[0026]Once a desired amount of ice has accumulated, the ice billet is harvested by switching off or by-passing a refrigerant valve from the refrigerant circuit and then activating the electric heater 210 to warm the cooling plate 204 until the ice billet 212 is released from the cooling plate 204, and it drops by gravity out of the mold cavity onto the guide ramp 214. The water left in the water tank 216 can then be discharged through a drainage system. The water tank 216 can be refilled by the appliance and the cycle can be repeated as necessary to create additional ice billets.

[0027]To help conserve water, in some examples the ice maker 106 can include a total dissolved solids (TDS) sensor to measure and monitor the concentration of impurities (e.g., salt) in the water tank 216. In these examples, the water in the water tank 216 may only be discharged and replaced when the concentration of impurities in the water tank 216 meets or exceeds a predefined limit, which may be sufficiently high to impact the taste or appearance of the ice billets. For example, a processor can detect that the TDS level meets or exceeds the predetermined limit based on a measurement from a TDS sensor coupled to the water tank 216. In response to such a detection, the processor can operate a discharge valve to direct water to a drain connected to the appliance instead of circulation through the nozzle 220. By waiting until the TDS measurement meets or exceeds the predetermined limit to discharge the water from the water tank 216, the same water may be reused for multiple ice billets until it begins to impact their taste or appearance. This may reduce the amount of water consumed by the ice maker 106, as compared to using new water for each ice billet.

[0028]FIG. 3 shows an exploded view of an example of an ice maker 106 according to some aspects of the present disclosure. As shown, the ice maker 106 can include a cover plate 224 with evaporator fins 206. The ice maker 106 can also include a cooling plate 204 with channels for receiving a cooling tube 208 and an electric heater 210. The cooling plate 204 can be substantially square in shape and have the channels engraved into its top and bottom sides for receiving the cooling tube 208 and the electric heater 210, respectively. The ice maker 106 can further include a conductive enclosure 300 for receiving an ice mold 302 defining a mold cavity. The conductive enclosure 300 may be die cast and made of any suitable thermally conductive metal material, such as aluminum or copper. The conductive enclosure 300 may be coupled to the cooling plate 204 to propagate thermal changes (e.g., heating and cooling) originating from the cooling plate 204 to the side walls of the ice mold 302, which may help in the creation or removal of an ice billet. The conductive enclosure 300 can be enclosed in a protective casing made from the side walls 222a-b and positioned above a housing 304. The guide ramp 214 can be positioned in the housing 304 to catch a falling ice billet (from the ice mold 302) and direct it to a cooled storage container. The nozzle 220 and pump 218 can be used to direct water through the bottom opening of the ice mold 302 into the mold cavity to create an ice billet. The nozzle 220 can be positioned below the guide ramp 214 and oriented upwards to spray water through perforations in the guide ramp 214 to create the ice billet.

[0029]FIG. 4 shows an example of an ice chamber module 202 of an ice maker according to some aspects of the present disclosure. As shown, the ice chamber module 202 can include a conductive enclosure 300 coupled to a cooling plate 204 that contains an electric heater 210 and a cooling tube 208. A cover plate 224 with evaporator fins 206 can be coupled over top of the cooling plate 204. The conductive enclosure 300 can include an ice mold 302 with a mold cavity 402 into which water can be sprayed to create an ice billet having a shape defined by the mold cavity 402.

[0030]FIG. 5 shows an example of an ice maker 106 and a cooled storage container 108 according to some aspects of the present disclosure. As shown, a drain assembly 502 can be affixed below the fins 206 of the ice maker 106 to direct water created from defrosting of the fins 206 to the water tank 216 or elsewhere. A duct 504 can also be positioned around the fins 206. Air can be circulated through the duct 504 by a fan 506. This can help cool the storage container 108 and thus facilitate storage of produced ice billets 212.

[0031]As noted earlier, it may be desirable to reshape the ice billets. To that end, an ice press may be used in some examples. FIG. 6 shows an example of such an ice press 600. The ice press 600 can be manually operated by a user independently of the ice maker 106.

[0032]The ice press 600 can include a pair of molds disposed opposite to each other in mold housings 602, 604. The pair of mold housings 602, 604 can be vertically openable and closable relative to one another. The upper mold housing 602 may contain an upper mold (not shown) and the lower mold housing 604 may contain a lower mold 610. The upper mold and upper mold housing 602 may be vertically movable together with respect to the lower mold and lower mold housing 604, or vice versa, along one or more guide rails 606. For example, by manually releasing the handle 608, the upper mold housing 602 containing the upper mold can fall downwardly along one or more guide rails 606 toward the lower mold 610 in the lower mold housing 604.

[0033]To operate the ice press 600, an ice billet can be disposed between the upper and lower molds. The upper mold can be lowered onto the ice billet. The ice billet can be melted via one or more electric heaters 616a-b in the upper mold housing 602 and/or the lower mold housing 604. The continued application of force and heat can reshape the ice billet into a shape defined by the upper and lower molds.

[0034]The upper and lower molds can be interchangeable molds that can be selectively removed from the upper and lower mold housings 602, 604, respectively, and replaced with different interchangeable molds 612a-b. For example, a user can manually detach the lower mold 610 from the lower mold housing 604 and replace the lower mold 610 with a different mold 612a, which can result in a different ice shape. The interchangeable molds can be sized to fit into corresponding receiving areas of the mold housings 602, 604 for use in the ice press 600.

[0035]FIG. 7 shows an example of a control system 700 associated with an ice maker 106 according to some aspects of the present disclosure. The control system 700 includes a processor 702 coupled to a memory 704. The processor 702 can include one processing device or multiple processing devices. Examples of the processor 702 include a Field-Programmable Gate Array (FPGA), an application-specific integrated circuit (ASIC), and a microprocessor. The processor 702 can execute instructions 706 stored in the memory 704 to perform one or more operations. In some examples, the instructions 706 can include processor-specific instructions generated by a compiler or an interpreter from code written in any suitable computer-programming language, such as C, C++, C#, and Java.

[0036]The memory 704 can include one memory device or multiple memory devices. The memory 704 can be volatile or non-volatile (i.e., the memory 704 can retain stored information when powered off). Examples of the memory 704 include electrically erasable and programmable read-only memory (EEPROM), flash memory, or any other type of non-volatile memory. At least a portion of the memory device includes a non-transitory computer-readable medium. A computer-readable medium can include electronic, optical, magnetic, or other storage devices capable of providing the processor 702 with the instructions 706 or other program code. Examples of a computer-readable medium include magnetic disks, memory chips, ROM, random-access memory (RAM), an ASIC, a configured processor, optical storage, or any other medium from which a computer processor can read the instructions 706.

[0037]In some examples, the processor 702 can be coupled to a valve 708 of a refrigerant circuit 707. As described above, the processor 702 can operate the valve 708 to circulate refrigerant through the cooling tube to cool a mold cavity of the ice maker. The processor may also be coupled to an electrical circuit 710, which may for example include one or more switching components (e.g., transistors or relays). The processor 702 can operate the electrical circuit 710 to activate the electric heater 210, which can be used to remove an ice billet from the mold cavity.

[0038]In some examples, the processor 702 can be coupled to one or more load sensors 712 (e.g., weight or force sensors). The processor 702 can receive load measurements from the load sensor 712. The load measurements can indicate an amount of water in the water tank of the ice maker. The processor 702 may use the load measurement to determine how much water is present in the water tank (e.g., whether the water tank is full, half full, or empty). The processor 702 may use this information to inform other decisions, such as whether to begin or end an ice production mode. For instance, to make an ice billet, the processor 702 may initiate the ice production mode. During the ice production mode, the processor 702 can operate a fill system 716 to pump water into the water tank of the ice maker. The processor 702 can operate the fill system 716 until the processor 702 receives a load measurement from the load sensor 712 indicating that the load meets or exceeds a first predefined threshold. The first predefined threshold may correspond to a sufficient amount of water to create an ice billet. In response to determining that the load measurement meets or exceeds the first predefined threshold, the processor 702 may deactivate the fill system 716.

[0039]Next, the processor 702 may activate a pump 218 of the ice maker to begin spraying water into the ice mold to create the ice. During this process, the processor 702 can continue to monitor the load associated with the water in water tank. If the load falls below a second predefined threshold, it may mean that a sufficient amount of water has been converted into an ice billet in the ice mold. So, the processor 702 can deactivate the pump 218 to end the ice production mode. The processor 702 may also initiate an ice harvesting mode.

[0040]In the ice harvesting mode, the processor 702 can activate the electric heater 210 (e.g., by transmitting a control signal to the electrical circuit). This can detach the ice billet from the ice mold. The ice billet can fall onto the guide ramp and slide into a cooled storage container.

[0041]In some examples, the processor 702 can be coupled to one or more transfer sensors 714 (e.g., optical sensors, load sensors, ultrasonic transducers, etc.). The transfer sensors can be positioned on the guide ramp or in the ice storage container to detect the transfer of the ice billet to the storage container and transmit corresponding sensor signals to the processor 702. In response to receiving the sensor signals, the processor 702 may activate a drainage system 718 to remove any excess water from the water tank. The drainage system 718 can include one or more valves that may be opened to drain the excess water from the water tank. Alternatively, the processor 702 may automatically activate the drainage system 718 at the conclusion of the ice production mode, at the conclusion of the ice harvesting mode, or at another point in time, irrespective of a sensor signal from the transfer sensor 714.

[0042]In some examples, the processor 702 may activate the drainage system 718 in response to determining that a level of impurities (e.g., salt) in the water tank meets or exceeds a predefined threshold. For instance, the processor 702 can use a TDS sensor 720 positioned in the water tank to monitor the TDS level of the water in the tank. In response to determining that the TDS level meets or exceeds a predetermined limit, the processor can operate drainage system 718 to expel water from the water tank. By waiting until the TDS measurement meets or exceeds the predetermined limit to discharge the water from the water tank, the same water may be reused for multiple ice billets until it begins to impact their taste or appearance. This may reduce the amount of water that is wasted by the ice maker.

[0043]FIGS. 8-10 show flowcharts of examples of different operating modes associated with a control system according to some aspects of the present disclosure. Other examples may involve more, fewer, different, or difference sequences of steps than are shown in these figures. FIGS. 8-10 are described below with reference to the components of FIG. 7 described above.

[0044]Referring now to FIG. 8, shown is an example of an ice production mode according to some aspects of the present disclosure. The ice production mode can begin at block 802, where the processor 702 can determine whether the ice maker is turned on. If not, the system can enter an ice storage mode. Otherwise, the process can proceed to block 804.

[0045]At block 804, the processor 702 turns on a refrigerant valve and a compressor. The refrigerant valve and the compressor may be parts of the refrigerant circuit 707 of FIG. 7. For example, the refrigerant valve may be the valve 708 of FIG. 7. Turning on the refrigerant valve and the compressor can begin to circulate refrigerant to the cooling tube of the cooling plate.

[0046]At block 806, the processor 702 determines whether the storage container (e.g., storage container 108 of FIG. 1) for the ice billets is full. For instance, the processor 702 may receive sensor signals from one or more fill sensors associated with the storage container, where the sensor signals indicate whether the storage container is full. An example of such a fill sensor can be an optical sensor. Based on the sensor signals, the processor 702 can determine whether the storage container is full. If the processor 702 determines that the storage container is full, the system can enter an ice storage mode. Otherwise, the process can continue to block 808.

[0047]At block 808, the processor 702 determines whether a temperature of the storage container is less than or equal to a first predefined threshold, such as −5° C. To do so, the processor 702 can receive a temperature measurement from a temperature sensor associated with (e.g., positioned in) the storage container. If the temperature of the storage container is greater than the first predefined threshold, the process can return to block 804 and iterate. This step can help ensure that the storage container is sufficiently cold to handle the ice billets. If the temperature of the storage container is less than or equal to the first predefined threshold, the process can continue to block 810.

[0048]At block 810, the processor 702 determines whether a temperature of the cooling plate (e.g., cooling plate 204 of FIG. 3) is less than or equal to a second predefined threshold, such as −20° C. To do so, the processor 702 can receive a temperature measurement from a temperature sensor associated with (e.g., positioned on) the cooling plate. If the temperature of the cooling plate is greater than the second predefined threshold, the process can return to block 804 and iterate. This step can help ensure that the cooling plate is sufficiently cold to create the ice billets. If the temperature of the cooling plate is less than or equal to the second predefined threshold, the process can continue to block 812.

[0049]At block 812, the processor 702 activates (e.g., opens) a water valve to fill a water tank of the ice maker. The water valve may be part of the fill system 716 of FIG. 7.

[0050]At block 814, the processor 702 determines whether a load measurement associated with the water tank is greater than or equal to a third predefined threshold. To do so, the processor 702 can receive a load measurement from a load sensor 712 associated with the water tank. If the load measurement is less than the third predefined threshold, the process can return to block 814 and iterate. This step can help ensure that there is sufficient water in the tank to create an ice billet. If the load measurement is greater than or equal to the third predefined threshold, the process can continue to block 816.

[0051]At block 816, the processor 702 deactivates (e.g., closes) the water valve to stop water flow into the water tank of the ice maker.

[0052]At block 818, the processor 702 activates the water pump (e.g., pump 218 of FIG. 3) of the ice maker to spray water into the ice mold to create an ice billet.

[0053]During this spraying process, in which ice accumulates on the cooling plate to create the ice billet, the processor 702 can monitor the load measurements from the load sensor 712. In some examples, the processor 702 can reduce the water flow over time based on the load measurements to prevent the water spray from perforating the ice billet. For example, the processor 702 can begin at 100% flow and gradually reduce the water flow over the course of building the ice billet. This can reduce the spray pressure over time, so that as the ice billet grows in size and gets closer to the spray nozzle, the pressure from the spray does not damage the ice billet. To determine how to reduce the water flow (e.g., spray pressure) over time, the processor 702 can apply a predefined algorithm. The predefined algorithm can depend on the load measurements. Decreasing load measurements can correspond to decreasing water levels in the tank, which in turn can correspond to an increase in the size of the ice billet. Thus, the load measurements can serve as an indicator of the amount of water left in the water tank, which in turn serves as a proxy for the amount of ice that has accumulated in the ice billet. Using these principles, the processor 702 can reduce the water flow based on the load measurements decreasing in value.

[0054]At block 820, the processor 702 determines whether a load measurement from the load sensor 712 is less than or equal to a fourth predefined threshold. The fourth predefined threshold may correspond to the difference between the weight of the full water tank and the weight of an ice billet. For example, if an ice billet requires 50% of the water in the tank to create, then the fourth predefined threshold may correspond to 50% of the weight of a full water tank. As another example, if an ice billet requires 30% of the water in the tank to create, then the fourth predefined threshold may correspond to 70% of the weight of a full water tank. The water tank may be considered “full” when it has been filled to the level sufficient to deactivate the water valve in blocks 814-816. If the processor 702 determines that the load measurement is greater than the fourth predefined threshold, the process can remain at block 820. This step can help ensure that an ice billet of sufficient size is created. If the processor 702 determines that the load measurement is less than or equal to the fourth predefined threshold, the process can continue to block 822.

[0055]At block 822, the processor turns off the water pump. The process may then enter the ice harvesting mode.

[0056]Referring now to FIG. 9, shown is an example of an ice storage mode according to some aspects of the present disclosure. In block 902, the processor 702 turns on a refrigerant valve and a compressor. The refrigerant valve and the compressor may be parts of the refrigerant circuit 707 of FIG. 7. For example, the refrigerant valve may be the valve 708 of FIG. 7. Turning on the refrigerant valve and the compressor can begin to circulate refrigerant to the cooling tube of the cooling plate, which may also help to cool the storage container.

[0057]In block 904, the processor 702 determines whether a temperature of the storage container is less than or equal to a first predefined threshold, such as −5° C. To do so, the processor 702 can receive a temperature measurement from a temperature sensor associated with (e.g., positioned in) the storage container. If the temperature of the storage container is greater than the first predefined threshold, the process can return to block 902 and iterate. This step can help ensure that the storage container is sufficiently cold to handle the ice billets. If the temperature of the storage container is less than or equal to the first predefined threshold, the process can continue to block 906.

[0058]In block 906, the processor 702 determines whether the storage container is full. For example, the processor 702 may receive sensor signals from one or more fill sensors associated with the storage container, where the sensor signals indicate whether the storage container is full. Based on the sensor signals, the processor 702 can determine whether the storage container is full. If the processor 702 determines that the storage container is full, the system can return to block 902. Otherwise, the system can enter the ice making mode.

[0059]Referring now to FIG. 10, shown is an example of an ice harvesting mode according to some aspects of the present disclosure. In block 1002, the processor 702 determines whether a temperature of the storage container is less than or equal to a first predefined threshold, such as −5° C. To do so, the processor 702 can receive a temperature measurement from a temperature sensor associated with (e.g., positioned in) the storage container. If the temperature of the storage container is greater than the first predefined threshold, the process can return to block 1002 and iterate. This step can help ensure that the storage container is sufficiently cold to handle the ice billets. If the temperature of the storage container is less than or equal to the first predefined threshold, the process can continue to block 1004.

[0060]At block 1004, the processor 702 turns off a refrigerant valve and a compressor. The refrigerant valve and the compressor may be parts of the refrigerant circuit 707 of FIG. 7. For example, the refrigerant valve may be the valve 708 of FIG. 7. Turning off the refrigerant valve and the compressor can prevent refrigerant from circulating to the cooling tube of the cooling plate.

[0061]At block 1006, the processor 702 turns on the electric heater 210 associated with the cooling plate. For example, the processor 702 can transmit a control signal to the electrical circuit 710 of FIG. 7 to turn on the electric heater 210.

[0062]At block 1008, the processor 702 determines whether a temperature of the cooling plate is greater than or equal to a fifth predefined threshold, such as 25° C. To do so, the processor 702 can receive a temperature measurement from a temperature sensor associated with (e.g., positioned in) the cooling plate. If the temperature of the cooling plate is less than or equal to the cooling plate predefined threshold, the process can return to block 1006 and iterate. This step can help ensure that the cooling plate is sufficiently warm to detach the ice billet. If the temperature of the cooling plate is greater than or equal to the fifth predefined threshold, the process can continue to block 1010.

[0063]At block 1010, the processor 702 turns off the electric heater 210 associated with the cooling plate.

[0064]At block 1012, the processor 702 determines whether the ice billet transferred to the storage container. For example, the processor 702 can detect a sensor signal from a transfer sensors 714. The sensor can be positioned in relation to the storage container to detect the transfer of the ice billet. Based on detecting the sensor signal, the processor 702 can determine that the ice billet transferred to the storage container.

[0065]If the processor 702 determines that the ice billet was transferred to the storage container, the process can continue to block 1014. Otherwise, the process can return to block 1012 and iterate.

[0066]At block 1014, the processor 702 activates a drainage system 718 to drain the water tank of the ice maker. For example, the processor 702 can transmit a control signal to a drainage valve of the drainage system 718 to open the drainage valve, so that water in the water tank can be drained from the water tank.

[0067]The foregoing description of certain examples, including illustrated examples, has been presented only for the purpose of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Numerous modifications, adaptations, and uses thereof will be apparent to those skilled in the art without departing from the scope of the disclosure. For instance, any examples described herein can be combined with any other examples to yield further examples.