Ice-making water circulation method, ice-making method and ice-making machine

Abstract

The invention relates to the technical field of ice making, and discloses an ice-making water circulation method, an ice-making method and an ice maker, the ice-making water circulation method comprises the following steps: making ice in an ice-making water tank, independently storing and recycling residual water left in the ice-making water tank in the previous round of ice making, optimizing the circulation mode of the ice-making water, and after the first round of ice-making circulation, enabling the ice-making water to pass through the ice-making water tank. The low initial water temperature can be achieved, the early-stage ice forming quality is improved, the problems that due to the high water temperature, the internal structure of the ice block is loose, and the ice block is prone to melting are solved, the manufactured ice block is more compact in structure and harder in texture, and the overall quality of the ice block is improved. The ice making method adopting the water circulation method for ice making and the ice making machine for implementing the ice making method also have the advantages.

Description

Technical Field

[0001] The present application relates to the technical field of ice making, and in particular to an ice making water circulation method, an ice making method and an ice making machine. Background Art

[0002] Ice makers typically have an ice-making area and a water tank for storing room-temperature water. During ice-making, the room-temperature water in the water tank is fed into the ice-making area for ice-making. After a round of ice-making is completed, the remaining water in the ice-making area that has not fully frozen flows back into the water tank, where it mixes with the ice-making water in the tank and is recycled for the next round of ice-making. However, ice-making cycles in ice-making machines are often short. In practice, after each round of ice-making, the remaining water flows back into the water tank, allowing the low-temperature remaining water to mix with the room-temperature water in the tank. Due to the small amount of remaining water, the temperature of the water fed from the water tank into the ice-making area remains relatively high. Consequently, the water in the ice-making area takes a long time to cool before freezing in subsequent ice-making cycles. This results in a shorter freezing time, resulting in poor quality ice, often exhibiting issues such as loose structure, insufficient ice thickness, poor shape, and easy breakage / melting. This hinders ice-making efficiency and quality. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a method for circulating water for ice making, effectively reducing the temperature of the water used for the next round of ice making. This application also proposes an ice making method employing this method and an ice making machine for implementing this method.

[0004] In a first aspect, the ice-making water circulation method according to an embodiment of the present application comprises the following steps: Water filling step: before starting a round of ice making, ice making water is filled in the ice making water tank so that the ice making water is used to make ice in the ice making water tank; Collecting step: after completing a round of ice making, draining the remaining unfrozen water in the ice making water tank out of the ice making water tank, and storing the remaining water separately in a first container, wherein the first container is separated from the ice making water tank; Water replenishment step: introducing replenishment water to replenish the ice-making water consumed in the previous round of ice-making, wherein the volume of the replenishment water is smaller than the volume of the remaining water, and the replenishment water is mixed with the remaining water to obtain the ice-making water for the next round of ice-making; The water filling step, the collecting step, and the water replenishing step are cycled.

[0005] The ice-making water circulation method according to the embodiment of the present application has at least the following beneficial effects: by cooling water in the ice-making water tank to make ice, the remaining water after cooling is stored separately after the ice-making is completed to prevent it from rapidly warming up. Before the next round of ice-making, supplementary water is added to supplement the water consumed in the previous round of ice-making, and the remaining water is mixed with the supplementary water. Since the volume of the added supplementary water is smaller than the remaining water, the temperature rise of the remaining water can be effectively reduced, so that after the first round of ice-making, the ice-making water obtained by mixing has a lower initial water temperature, thereby starting to cool down and make ice at a lower temperature. This method can effectively reduce the time required to reduce the ice-making water to a temperature suitable for freezing, ensure that there is enough time for freezing into ice, thereby improving the quality of the early ice formation and enhancing the structural density and shape stability of the ice.

[0006] Optionally, in the water replenishment step, the replenishment water is introduced according to the consumption of the ice-making water in the previous round of ice-making.

[0007] Optionally, the consumption is determined based on the liquid level of the ice making water tank before the start of the previous round of ice making, or based on the change in the liquid level of the ice making water tank before and after the start of the previous round of ice making; the amount of the supplementary water is equal to the consumption.

[0008] Optionally, in the water replenishment step: the replenished water is mixed with the remaining water in the first container and / or the ice-making water tank; or, the remaining water is introduced into the ice-making water tank, and the replenished water is mixed with the remaining water during the process of introducing the remaining water into the ice-making water tank.

[0009] Optionally, water is stored in a second container, and the second container is separated from the first container and the ice making water tank; wherein: In the water filling step, before starting the first round of ice making, the stored water is transported from the second container to the ice making water tank as the ice making water for the first round of ice making; And / or, in the water replenishing step, the stored water is introduced from the second container as the replenishing water.

[0010] Optionally, before starting the first round of ice making, the method of transporting the stored water from the second container to the ice-making water tank includes: introducing the stored water from the second container into the first container, and then introducing the stored water from the first container into the ice-making water tank; or, introducing the stored water directly from the second container into the ice-making water tank.

[0011] Optionally, the temperature of the stored water is higher than that of the remaining water.

[0012] Optionally, the volume of the ice-making water in each round of ice-making is configured so that the volume of the remaining water in each round of ice-making is greater than the volume of the ice-making water consumed in the current round of ice-making.

[0013] In a second aspect, the ice making method of the embodiment of the present application includes: The ice-making water circulation method of the first embodiment is adopted to supply the ice-making water to the ice-making water tank, and perform multiple rounds of ice making in a cycle; In each round of ice making, an ice maker is immersed in the ice making water in the ice making water tank to cool the ice making water, so that part of the ice making water is frozen into ice on the ice maker, and part of the ice making water is not frozen and forms residual water.

[0014] According to the ice-making method of the embodiment of the present application, there are at least the following beneficial effects: in the ice-making method of the embodiment of the present application, the ice-making water circulation method of the above-mentioned first embodiment is adopted, so after the first round of ice making, the early ice quality can be effectively improved, and the structural density and shape stability of the ice can be improved.

[0015] Optionally, starting from the second round of ice making, in each round of ice making, the thickness of the ice frozen on the ice maker is detected by a detector, and when the thickness reaches a set thickness, the current round of ice making is stopped.

[0016] Optionally, after each round of ice making is completed and before the next round of ice making begins the water filling step, the remaining unfrozen water in the ice making water tank is first drained out of the ice making water tank, and then the ice maker is heated to separate the frozen ice on the ice maker from the ice maker.

[0017] In a third aspect, an ice-making machine according to an embodiment of the present application is used to implement the ice-making method according to the second aspect, and the ice-making machine includes: Ice making water tank, used to hold water for making ice; An ice-making assembly, comprising an evaporator and an ice maker, wherein the ice maker is connected to one side of the evaporator so that the ice maker can be immersed in the ice-making water, the evaporator is used to introduce cold energy to cool the ice maker, and the ice maker is used to cool the ice-making water so that a portion of the ice-making water freezes into ice on the ice maker; a first container, disposed separately from the ice making water tank, for storing unfrozen residual water discharged from the ice making water tank; a first pumper, connected to the ice-making water tank and the first container, for pumping liquid between the ice-making water tank and the first container; The second pump is connected to the ice-making water tank and / or the first container and is used to add supplementary water to the ice-making water tank and / or the first container.

[0018] The ice-making machine according to the embodiment of the present application has at least the following beneficial effects: by adding an independent first container, the residual water from the previous round of ice-making can be separately collected and stored, effectively avoiding the phenomenon of a significant temperature recovery of the low-temperature residual water. With the help of a second pump, water can be added to the ice-making water tank and / or the first container to make up for the ice-making water consumed in the previous round of ice-making. After the added water is mixed with the residual water, it is used for the next round of ice-making, ensuring that there is sufficient water for each round of ice-making. At the same time, the low-temperature characteristics of the residual water are efficiently utilized to keep the initial temperature of the water for the next round of ice-making low, thereby effectively solving the problems of low ice-making efficiency and poor ice quality caused by the high initial water temperature, and helping to reduce the energy consumption of the ice-making machine. Optionally, the ice maker further includes a guide groove, which is located below the ice-making water trough. The guide groove is provided with a reflux port, which is connected to the first container. The guide groove is used to accommodate the remaining water discharged from the ice-making water trough and return it to the first container through the reflux port.

[0019] Optionally, the ice maker further comprises a second container, the second container being used to hold and store water, and the second container being separately arranged from the first container and the ice making water tank; The second pump is connected to the second container and the ice-making water tank, and is used to pump liquid from the second container to the ice-making water tank; And / or, the second pump is connected to the first container and the second container, and is used to pump liquid from the second container to the first container.

[0020] Optionally, the capacity of the second container is greater than that of the first container; and / or the capacity of the first container is greater than that of the ice-making water tank.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of a water circulation method for ice making according to an embodiment of the present application; Figure 2 This is a structural diagram of an ice maker according to an embodiment of the present application; Figure 3 Schematic diagram of the theoretical and measured water temperature change curves for ice making in Experimental Scheme 1 and Scheme 2; Figure 4 This is the ice-making effect diagram of experimental scheme 1; Figure 5 This is a comparison chart of the ice-making effects of experimental schemes 1 and 2.

[0023] Reference numerals: Water filling step S10; collection step S20; water replenishment step S30; Ice making water tank 100; first container 200; second container 300; Ice making assembly 400; evaporator 410; ice maker 420; guide groove 500; return port 510; Red curve L1, blue curve L2, purple curve L3, green curve L4. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the concept and technical effects of this application in conjunction with the embodiments to fully understand the purpose, features and effects of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of this application.

[0025] In the description of the embodiments of the present application, if orientation descriptions are involved, the orientations or positional relationships indicated by "up", "down", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0026] In the description of the embodiments of the present application, if a certain feature is referred to as being “set,” “fixed,” “connected,” or “installed” on another feature, it may be directly set, fixed, or connected on the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present application, if “several” is involved, it means more than one; if “multiple” is involved, it means more than two; if “greater than,” “less than,” or “exceeds” is involved, it should be understood as not including the number itself; if “above,” “below,” or “within” is involved, it should be understood as including the number itself. If “first” or “second” is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] The present application discloses an ice-making water circulation method. Ice is made in an ice-making water tank, and the remaining water from the previous round of ice making in the ice-making water tank is separately stored and recycled. This optimizes the ice-making water circulation method. After the first round of ice-making, a lower initial water temperature can be obtained, improving the quality of the ice formed in the early stage and reducing problems such as loose internal structure and easy melting of ice cubes caused by high water temperature. The resulting ice cubes have a denser structure and a harder texture, thereby improving the overall quality of the ice cubes. The present application also discloses an ice-making method using this ice-making water circulation method and an ice-making machine for implementing this ice-making method.

[0028] The following describes the embodiments of the present application in conjunction with the accompanying drawings: refer to Figure 1 and Figure 2 The ice-making water circulation method of the embodiment of the present application is used to circulate ice-making water in multiple cycles of ice-making in an ice-making machine. The method includes a water filling step S10, a water collection step S20, and a water replenishment step S30, wherein: Water filling step S10: before starting a round of ice making, ice making water is filled in the ice making water tank 100 so that ice can be made in the ice making water tank 100 .

[0029] During each round of ice making, the ice-making water in the ice-making water tank 100 is cooled, causing some of the water to freeze into ice, while the unfrozen portion remains in the ice-making water tank 100. Therefore, by holding the ice-making water in the ice-making water tank 100 and making ice in the ice-making water tank 100, the remaining water from ice making can be effectively preserved in the ice-making water tank 100.

[0030] Collecting step S20: After completing a round of ice making, the remaining unfrozen water in the ice making water tank 100 is discharged from the ice making water tank 100 and stored separately in the first container 200. The first container 200 is separated from the ice making water tank 100.

[0031] After each round of ice making, the remaining unfrozen water in the ice making water tank 100 is cooled to a lower temperature than water at room temperature. Therefore, the first container 200 can be used to store the remaining water separately to effectively ensure its low temperature state.

[0032] Water replenishment step S30: introducing replenishment water to replenish the ice-making water consumed in the previous round of ice-making. The volume of the replenishment water is smaller than the volume of the remaining water. The replenishment water is mixed with the remaining water to obtain ice-making water for the next round of ice-making.

[0033] Since the volume of the added supplementary water is smaller than the residual water, the temperature rise of the residual water can be effectively reduced, so that after the first round of ice making, the residual water and the supplementary water are mixed and still have a lower initial water temperature. The obtained ice-making water can start the next round of ice making at a lower temperature. In some embodiments of the ice-making water circulation method, the volume of ice-making water for each round of ice making is configured so that the volume of the residual water in each round of ice making is greater than the volume of ice-making water consumed in the current round of ice making. Therefore, when water is replenished before the next round of ice making begins, the amount of supplementary water is less than the amount of residual water. Therefore, even if the supplementary water is room temperature water, the amount of supplementary water added each time will not significantly increase the overall water temperature, ensuring that each round of ice making can start from a lower temperature.

[0034] In some cases, the duration of an ice-making cycle in an ice-making machine is limited to a certain time period. Since the initial temperature of the ice-making water in the first cycle is relatively high, the time required to wait for the water temperature to drop to a low enough temperature for freezing takes up the time required for ice formation. As a result, the ice cubes after the first cycle of ice-making usually cannot reach acceptable quality. However, when the remaining water is returned to the normal temperature water tank, the remaining water is mixed into the normal temperature water tank. Since the amount of remaining water is relatively small, the temperature drop of the water in the normal temperature water tank is relatively small. The ice-making water for the next cycle of ice-making is obtained from the normal temperature water tank, and the initial temperature of the ice-making water is still relatively high. As a result, the next cycle of ice-making still requires a long time to wait for the water temperature to drop. In this cycle, the temperature drop of the water in the normal temperature water tank is relatively small. Therefore, ice-making machines using this type of circulation method have difficulty achieving ideal ice cube quality in multiple cycles of ice-making in the early stages of ice-making.

[0035] In contrast, the method of the present application stores and recycles low-temperature residual water separately, adds a small amount of supplementary water, and can efficiently utilize the temperature of the residual water starting from the second round of ice making. This allows each round of ice making to start with a lower initial water temperature, significantly shortening the waiting time, extending the freezing time, and significantly improving the quality of ice cubes. Through this method, the ice maker can effectively reduce the time required to reduce the ice-making water for the next round of ice making to a temperature suitable for freezing after the first round of ice making during continuous operation, ensuring sufficient time for freezing into ice, thereby improving the quality of early ice formation and enhancing the structural density and shape stability of the ice. In the circulating water filling step S10, the collection step S20, and the water replenishment step S30, the ice-making water can maintain a lower initial water temperature in multiple rounds of ice-making cycles, which not only improves the ice-making efficiency, but also ensures the ice quality, making the ice-making process more efficient and the ice quality more stable.

[0036] refer to Figure 1 and Figure 2In some embodiments of the ice-making water circulation method, in the water replenishment step S30, replenishment water can be introduced based on the water consumption in the previous ice-making cycle, enabling controllable replenishment water volume to ensure that the ideal initial water temperature is achieved after mixing. This refined water replenishment management further improves the stability and reliability of the ice-making process.

[0037] It can be understood that the methods of introducing make-up water according to the consumption of ice-making water in the previous round of ice-making include: The consumption of ice-making water in the previous round of ice-making is determined based on the change in the liquid level in the ice-making water tank 100 at the beginning and end of the previous round of ice-making, and the amount of replenishing water is equal to the consumption of ice-making water in the previous round of ice-making; alternatively, the target liquid level in the ice-making water tank 100 for the next round of ice-making is determined based on the liquid level in the ice-making water tank 100 at the beginning of the previous round of ice-making, and the amount of replenishing water satisfies: the ice-making water obtained by mixing the replenishing water and the remaining water reaches the target liquid level, thereby ensuring that the water level in the ice-making water tank 100 is stable during each round of ice-making, thereby avoiding affecting the ice-making effect due to water level fluctuations.

[0038] In actual operation, the liquid level in the ice-making water tank 100 can be measured by a liquid level sensor, and the replenishing water can be pumped by a pump. The liquid level sensor monitors the data in real time, and the pump adjusts the replenishing water amount according to the data, thereby achieving accurate measurement of liquid level changes to ensure that the replenishing water amount is consistent with the consumption, avoid temperature fluctuations caused by excessive replenishing water, maintain the low temperature stability of the ice-making water, and thus ensure that in the multiple recycling of the remaining water, each round of ice-making water can have a relatively stable initial temperature, which can significantly shorten the cooling time of the ice-making water, thereby ensuring sufficient ice-making time, which is beneficial to ensuring the consistency of ice cubes.

[0039] Alternatively, in some embodiments, before the first round of ice making begins, the ice-making water required for the first round of ice making is introduced into the first container 200 and then introduced from the first container 200 into the ice-making water tank 100. In this case, the target liquid level in the first container 200 can be determined based on the liquid level of the water introduced into the first container 200 before the first round of ice making begins, and the amount of supplemental water is such that the ice-making water obtained by mixing the supplemental water and the remaining water in the first container 200 reaches the target liquid level in the first container 200. This ensures that the amount of ice-making water subsequently entering the ice-making water tank 100 for each round of ice making is consistent with the amount of water used in the first round of ice making.

[0040] refer to Figure 1 and Figure 2In some embodiments of the ice-making water circulation method, after the collection step S20, the water replenishment step S30 and the water filling step S10 are sequentially performed. The replenished water can be mixed with the remaining water at multiple locations such as the first container 200 and the ice-making water tank 100. The remaining water and the replenished water can be transported by a pump. For example, the remaining water can be transported between the first container 200 and the ice-making water tank 100 by a first pump, and the replenished water can be introduced by a second pump. The mixed ice-making water is then filled in the ice-making water tank 100, and then the next round of ice-making is carried out. For example: The supplementary water can be mixed with the remaining water in the first container 200. After the remaining water from the previous round of ice making is introduced into the first container 200, the supplementary water is introduced into the first container 200, the remaining water and the supplementary water are mixed in the first container 200, and the ice-making water obtained by mixing is then introduced from the first container 200 into the ice-making water tank 100. For example, the supplementary water can be pumped from a water source into the first container 200 by a second pump, mixed with the remaining water in the first container 200 to obtain the ice-making water. When the ice-making water in the first container 200 reaches a target liquid level, the second pump stops pumping, and the mixed ice-making water is then introduced into the ice-making water tank 100 by the first pump.

[0041] Alternatively, the supplementary water can be mixed with the remaining water in the ice making tank 100. The remaining water is introduced from the first container 200 into the ice making tank 100, and the supplementary water is introduced into the ice making tank 100. The remaining water and the supplementary water are mixed in the ice making tank 100 to obtain the ice making water. For example, the remaining water can be pumped from the first container 200 to the ice making tank 100 by a first pump, and then the supplementary water is introduced into the ice making tank 100 by a second pump. The two waters are mixed in the ice making tank 100 to obtain the ice making water. When the ice making water in the ice making tank 100 reaches the target liquid level, the pumping of the supplementary water is stopped. This shortens the flow path of the supplementary water and enables more efficient preparation of ice making water for the next round of ice making.

[0042] Alternatively, a mixing device may be provided outside the ice making water tank 100, and the supplementary water and the remaining water may be introduced into the mixing device for mixing before being transported to the ice making water tank 100 through a pipeline to ensure uniform mixing and avoid local temperature differences.

[0043] Alternatively, before the next round of ice making begins, the remaining water can be introduced into the ice making water tank 100, and the supplementary water can be mixed with the remaining water during the process of the remaining water being introduced into the ice making water tank 100. For example, the remaining water can be pumped from the first container 200 into the ice making water tank 100 by a first pump, and the supplementary water can be introduced into the delivery pipeline of the first pump by a second pump. The two waters can be mixed in the tank delivery pipeline and enter the ice making water tank 100. When the target liquid level in the ice making water tank 100 is reached, the pumping of the supplementary water is stopped.

[0044] Alternatively, during the current round of ice making, a fixed amount of supplementary water (no more than the amount consumed in one round of ice making) can be added to the first container 200. After the current round of ice making is completed, the remaining water can be introduced into the first container 200 to mix with the supplementary water. At this point, if the mixed water in the first container 200 has reached the target liquid level, no further supplementary water needs to be added. If the mixed water has not reached the target liquid level in the first container 200, further supplementary water can be added to the first container 200 until the target liquid level is reached. The mixed water is introduced from the first container 200 into the ice making water tank 100.

[0045] When implementing the ice-making water circulation method of the present application, a suitable mixing position and mixing method can be selected according to actual needs to achieve the best structural arrangement, ice-making effect or energy-saving effect.

[0046] refer to Figure 1 and Figure 2 In the ice-making water circulation method of some embodiments of the present application, the ice-making water and supplementary water required for the first round of ice-making can be introduced through an external water source such as tap water, or the second container 300 can be used to hold stored water, and the stored water can be used as the source of the ice-making water and supplementary water required for the first round of ice-making.

[0047] The second container 300 is separated from the first container 200 and the ice making water tank 100. The second container 300 can be an internal container of the ice making machine, an external container configured separately for the ice making machine, a water storage container of a water dispenser, or an external container shared by multiple ice making machines.

[0048] The stored water may be water at room temperature, or some water dispensers have a refrigeration function. When the water storage container of a water dispenser with a refrigeration function is used as the second container 300, the stored water may also be cold water stored after the water dispenser is refrigerated.

[0049] refer to Figure 1 and Figure 2 In the water filling step S10, before the first round of ice making begins, stored water is transported from the second container 300 to the ice making water tank 100 as ice making water for the first round of ice making; the stored water can be introduced from the second container 300 into the first container 200, and then introduced into the ice making water tank 100 from the first container 200; or, the stored water can be directly introduced from the second container 300 into the ice making water tank 100.

[0050] In the water replenishment step S30, stored water is introduced from the second container 300 as replenishment water. For example, the stored water can be introduced from the second container 300 into the first container 200, mixed with the remaining water in the first container 200, and then introduced into the ice-making water tank 100. Alternatively, the stored water can be directly pumped from the second container 300 to the ice-making water tank 100, where it is mixed with the remaining water. The second container 300 can pump the stored water into the first container 200 and / or the ice-making water tank 100 via a second pump.

[0051] As an example, the ice-making water circulation method according to the embodiment of the present application can be circulated in the following mode: Mode 1: Before the first round of ice making, an initial amount of stored water is added from the second container 300 to the first container 200 via the second pump, and the stored water is introduced from the first container 200 into the ice-making water tank 100 via the first pump to carry out the first round of ice making. After ice making is completed, the remaining water is discharged from the ice-making water tank 100 and introduced into the first container 200 for separate storage. Before the next round of ice making, an amount of stored water equal to the amount consumed in the previous round of ice making is added to the first container 200 via the second pump as make-up water. The make-up water is mixed with the remaining water in the first container 200 to obtain ice-making water consistent with the initial water volume. After that, the water is re-injected into the ice-making water tank 100 via the first pump to start the next round of ice making. This process is repeated.

[0052] Mode 2: Before the first round of ice making, an initial amount of stored water is added from the second container 300 to the ice making water tank 100 via the second pump to carry out the first round of ice making; after ice making is completed, the remaining water is discharged from the ice making water tank 100 and introduced into the first container 200 for separate storage; before the next round of ice making, the remaining water in the first container 200 is introduced into the ice making water tank 100 via the first pump, and an amount of stored water equal to the amount consumed in the previous round of ice making is added to the ice making water tank 100 via the second pump as make-up water, which is mixed with the remaining water in the ice making water tank 100 to obtain water for ice making consistent with the initial amount of water, and the next round of ice making begins, and this process is repeated.

[0053] Through this cycle, each subsequent round of ice making fully utilizes the remaining low-temperature water, achieving a lower initial water temperature. This ensures consistent ice quality and significantly improves ice-making efficiency, resulting in efficient and stable ice-making. Furthermore, due to the lower initial water temperature, the time required to cool the water and freeze it into ice is shortened, further improving ice-making efficiency.

[0054] refer to Figure 1 and Figure 2The ice-making method of the present embodiment adopts the ice-making water circulation method of the first embodiment, supplying ice-making water to the ice-making water tank 100 for multiple rounds of ice-making. During each round of ice-making, an ice maker 420 is immersed in the ice-making water within the ice-making water tank 100 to cool the ice-making water, causing some of the ice-making water to freeze into ice on the ice maker 420, while some of the ice-making water remains unfrozen, forming residual water. The ice-making water circulation method of the first embodiment effectively improves the quality of the ice formed in the early stages of ice-making after the first round of ice-making, enhancing the structural density and shape stability of the ice.

[0055] Because the initial water temperature drops significantly after the first round of ice making, the time required to cool the water temperature and freeze the ice is shortened, and each round of ice making reaches the set thickness in a shorter time. Therefore, in some embodiments of the ice-making method, starting with the second round of ice making, a detector detects the thickness of the ice frozen on ice maker 420 during each round. The detector can determine whether the ice thickness on ice maker 420 has reached the required thickness by detecting the diameter of the ice or the increase in ice thickness. A distance detector can be used to detect the distance from the surface of ice maker 420 used to freeze ice cubes before ice making, as well as the distance from the surface of the ice cubes after ice formation, thereby determining the increase in ice thickness. When the thickness reaches the set thickness, the current round of ice making is stopped, thereby appropriately shortening the total time of each round of ice making and further improving ice making efficiency.

[0056] refer to Figure 1 and Figure 2 In some embodiments of the ice-making method, after each round of ice-making is completed and before the next round of ice-making is performed in the water filling step S10, the remaining unfrozen water in the ice-making water tank 100 is first drained out of the ice-making water tank 100, and then heat is supplied to the ice maker 420 to separate the frozen ice on the ice maker 420 from the ice maker 420, thereby avoiding interference of the defrosting process on the water temperature of the remaining water.

[0057] The remaining water can be returned to the first container 200 for recycling. The ice maker 420 can be heated by a heating element or other heat source. The heating duration and temperature can be adjusted based on the specific design of the ice maker 420 and the ice-making conditions to ensure that ice cubes can be smoothly removed from the ice maker 420.

[0058] refer to Figure 1 and Figure 2 The ice-making machine of the embodiment of the present application is used to implement the ice-making method of the second embodiment of the present invention, and the ice-making machine includes: An ice making water tank 100 is used to hold water for ice making; The ice-making assembly 400 includes an evaporator 410 and an ice maker 420. The ice maker 420 is connected to one side of the evaporator 410 so that the ice maker 420 can be immersed in the ice-making water. The evaporator 410 is used to introduce cold energy to cool the ice maker 420. The ice maker 420 is used to cool the ice-making water so that part of the ice-making water freezes into ice on the ice maker 420. The first container 200 is separated from the ice-making water tank 100 and is used to store the remaining unfrozen water discharged from the ice-making water tank 100; a first pump connected to the ice-making water tank 100 and the first container 200 and configured to pump liquid between the ice-making water tank 100 and the first container 200; The second pump is connected to the ice-making water tank 100 and / or the first container 200 and is used to add supplementary water to the ice-making water tank 100 and / or the first container 200 .

[0059] The ice-making machine of the embodiment of the present application achieves the separate collection and storage of the remaining water from the previous round of ice-making by adding an independent first container 200, effectively avoiding the phenomenon of a significant temperature recovery of the low-temperature residual water. With the help of a second pump, water can be added to the ice-making water tank 100 and / or the first container 200 to make up for the ice-making water consumed in the previous round of ice-making. After the added water is mixed with the remaining water, it is used for the next round of ice-making, ensuring that there is sufficient water for each round of ice-making. At the same time, the low-temperature characteristics of the remaining water are efficiently utilized to maintain a low initial temperature for the water used in the next round of ice-making, thereby effectively solving the problems of low ice-making efficiency and poor ice quality caused by high initial water temperature, and helping to reduce the energy consumption of the ice-making machine.

[0060] In some embodiments, the ice maker further includes a diversion trough 500 located below the ice making water tank 100. The diversion trough 500 is provided with a return port 510 that communicates with the first container 200. The diversion trough 500 receives excess water from the ice making water tank 100 and returns it to the first container 200 through the return port 510. After a round of ice making is completed, the excess water can be poured into the diversion trough 500 by dumping the ice making water tank 100. Alternatively, a drain port can be provided at the bottom of the ice making water tank 100, with a drain valve installed at the drain port. After a round of ice making is completed, the drain valve can be opened to drain the excess water into the diversion trough 500 and into the first container 200 through the return port 510. The return port 510 of the diversion trough 500 is connected to the first container 200, ensuring that the excess water can flow back into the first container 200 quickly and unimpeded. This simplifies the excess water recovery process.

[0061] In some embodiments of the present application, the ice maker further includes a second container 300 for storing water. The second container 300 is separated from the first container 200 and the ice making water tank 100. A second pump connects the second container 300 and the ice making water tank 100 and is used to pump liquid from the second container 300 to the ice making water tank 100. The capacity of the second container 300 is greater than that of the first container 200. The second container 300 can be used to store a large amount of water to provide the water needed for multiple rounds of ice making by the ice maker. In some embodiments, the capacity of the first container 200 is greater than that of the ice making water tank 100 to ensure that sufficient excess water can be collected.

[0062] In addition, a second pumper connects the second container 300 and the first container 200, and is used to pump liquid from the second container 300 to the first container 200. In practical applications, the second container 300, as a water storage container, can store a large amount of water in advance. By activating the second pumper, the water in the second container 300 can be quickly pumped into the first container 200 or the ice-making water tank 100, eliminating the need for manual water addition. Furthermore, since the second container 300, the first container 200, and the ice-making water tank 100 are all separated, the water can be separated during storage and transfer, preventing the water temperatures in different areas from interfering with each other.

[0063] Compared with some ice-making water circulation methods that return the remaining water from the previous round of ice-making to a normal temperature water tank, the ice-making water circulation method, ice-making method and ice-making machine for implementing the ice-making method in the embodiments of the present application can effectively lower the initial water temperature of the ice-making water at the beginning of the second round of ice-making.

[0064] According to the basic formula of the heat balance equation (no phase change): , the cooling effect of the remaining water on the water used for ice making can be accurately calculated.

[0065] in, is the mass of the remaining water, is the temperature of the remaining water; To improve the quality of water, The temperature of the make-up water; The temperature of the water after mixing.

[0066] Calculate the mixed water temperature have to:

[0067] By substituting the actual value, the mixed water temperature can be obtained to ensure the maximum ice making efficiency. and ratio, ensuring Close to the ideal initial temperature (such as 0 degrees), further improving ice making efficiency.

[0068] The ice-making water circulation method of the embodiment of the present application is more effective for the ice-making method of immersing the ice maker 420 in the ice-making water tank 100 to make ice. The ice maker 420 is immersed in the ice-making water tank 100, which can cool the ice-making water contained in the ice-making water tank 100. During the cooling and freezing process, the ice-making water remains contained in the ice-making water tank 100 and is in a relatively static state, which can effectively ensure the cooling efficiency of the ice-making water and the stability of the ice body during the freezing process.

[0069] Taking the preparation of bullet ice as an example, ice is made by an ice maker 420 having a columnar ice column. When making ice, the ice column of the ice maker 420 is immersed in ice-making water, and the ice-making water is cooled to a temperature suitable for freezing (for example, around 0 degrees), and the ice-making water begins to gradually freeze on the ice column.

[0070] As freezing time increases, the frozen icicles on the ice column gradually thicken, gradually reaching the desired thickness of bullet ice. After the first round of ice making, the temperature of the remaining water is lowered, and a small amount of make-up water (such as room temperature water) is mixed into the cooler remaining water. This does not significantly increase the temperature of the remaining water, resulting in ice-making water with a lower initial temperature (lower than the initial temperature of the first round of ice making) for the next round of ice making. Therefore, in the second ice-making cycle, the lower-temperature ice-making water can freeze faster. If the ice-making cycle is fixed, the time spent cooling the ice-making water within a cycle is shortened, and the actual time spent freezing is longer. As a result, the second and subsequent ice-making cycles will produce complete, round, and dense ice cubes.

[0071] Even though there may be some factors in the ice maker that affect the temperature of the remaining water in the early stage of ice making, such as the temperature of the first container 200 for holding the remaining water, the temperature of the ice basket for holding ice cubes or the temperature of the second container 300 for storing water at room temperature, the internal ambient temperature of the ice maker, or the ambient temperature formed by the connection between the inside of the ice maker and the external environment, these factors may cause the remaining water in ice making to rise to a certain extent in the early stage of ice making. However, by adopting the circulation method of the present solution, after multiple rounds of ice making, the temperature of the above-mentioned structures or environments will gradually decrease, and thus their influence on the temperature of the remaining water will also gradually decrease, so that the temperature of the remaining water after multiple rounds of ice making can be maintained at a low temperature. The temperature of the mixed water obtained by adding a small amount of make-up water is closer to the ideal water temperature, and ice can be frozen faster during ice making. Therefore, the cycle of each round of ice making can be shortened in the later stage of ice making, which is beneficial to improving ice making efficiency while ensuring the quality of ice cubes.

[0072] The effectiveness of the present invention has been verified through specific comparative experiments. Under the same conditions, the recycling of residual water significantly improves the quality of ice cubes in the early stages of ice making. The following are the experimental details: Experimental parameters: The experimental unit is configured as follows: water tank A (300ml), container B (1300ml); Room temperature water: 25°C, stored in container B (1300ml); Experimental conditions: indoor environment at 25°C under standard atmospheric pressure; Single-wheel ice making cycle: 8 minutes; Water consumption per round of ice making: 35ml (actual measurement).

[0073] Experimental plan: Solution 1 (traditional solution): After each round of ice making, the remaining water in tank A flows back to the water tank container B inside the machine, and water is replenished in container B. Water is then refilled into tank A in the next round.

[0074] Solution 2 (solution according to an embodiment of the present application): After each round of ice making, 35 ml of water is added from container B to water tank A for the next round of ice making.

[0075] Theoretical and measured water temperature change curves for ice making in Scheme 1 and Scheme 2 Figure 3 Among them, the red curve L1 is the measured temperature change curve of Scheme 1, the blue curve L2 is the theoretical temperature change curve of Scheme 1, the purple curve L3 is the measured temperature change curve of Scheme 2; the green curve L4 is the theoretical temperature change curve of Scheme 2.

[0076] Option 1: Water tank A (300ml) is the ice-making water tank, and container B (1300ml) is the water tank inside the machine. After each round of ice making, the remaining water in water tank A flows back to container B, and 35ml of water is added to container B. In the next round, water is refilled from container B to water tank A.

[0077] First round of ice making: Water tank A receives 300ml of 25℃ water from container B, and container B has 1000ml of 25℃ water remaining. Ice making: The ice maker 420 starts to lower the water temperature in the water tank A. It takes 2 minutes to lower the 25°C room temperature water to 0°C. Ice making starts 2 minutes later. The water in the water tank A freezes on the ice maker 420. The actual time used for ice making is 6 minutes.

[0078] Drainage: After ice making is completed, 35 ml of ice is consumed, and 265 ml of residual water at close to 0°C remains in water tank A. The 265 ml of residual water is mixed with 1000 ml of room-temperature water in container B, and 35 ml of water is added to container B to make up for the water consumed in the previous round of ice making. As a result, the temperature of the room-temperature water in container B drops slightly, and the temperature of the mixed water in container B is close to 25°C.

[0079] Second round of ice making: Water tank A receives mixed water at a temperature close to 25°C from container B and makes ice and drains water in the same way; According to the above solution 1, after the first round of ice making, the temperature of the remaining water is close to 0°C. Based on the calculation of 1°C, the aforementioned heat balance equation is used to calculate the temperature of the remaining water (about 265ml, about 1°C) after mixing with the room-temperature water in container B (about 965ml, about 25°C) and the consumed 35ml room-temperature water (about 25°C) added to container B from outside (rounded to two decimal places):

[0080] According to this formula, the theoretical value of the mixed water temperature after the second and subsequent rounds of ice making is calculated. The mixed water temperature and theoretical change curve calculated after each round of ice making can be referred to Figure 3 The blue curve L2: After the second round, calculate the remaining water (about 265ml, about 1℃) and the room temperature water in container B (about 1000ml, about ℃) and the water temperature after mixing with the consumed 35ml of room temperature water (about 25℃) added to container B from the outside (keep two decimal places):

[0081] Similarly, calculate the temperature of the mixed water after rounds 3-5:

[0082]

[0083]

[0084] Similarly, calculate the temperature of the mixed water after the 6th to 20th rounds. The theoretical water temperature data can be referred to Figure 3 The value corresponding to the blue curve L2 in [ 1 ]. The above calculations show that for Scheme 1, the temperature of the water injected into ice-making tank 100 decreases with each injection from the 1st to the 20th ice-making round. After the 20th round, the theoretical water temperature (calculated using the aforementioned heat balance equation) for Scheme 1 approaches 3.8°C. This means that the temperature of the mixed water obtained by Scheme 1's residual water mixing method slowly decreases before the 20th round. Only after 20 rounds of ice-making can the theoretically calculated mixed water temperature in container B drop from approximately 25°C to approximately 3.8°C.

[0085] According to the actual measurement of Scheme 1, after the first round of ice making, the temperature of the remaining water mixed into container B was measured to be 22.9°C. The initial temperature values ​​of the water used in the 2nd to 5th rounds of ice making were: 20.1°C, 17.1°C, 15.2°C, and 13.8°C, respectively. The measured temperature change curve of the mixed water from the 2nd round to the subsequent rounds of ice making can be referred to Figure 3The red curve L1 shows that according to the measured temperature, with Solution 1, the mixed water temperature in container B can only drop from approximately 25°C to approximately 6.5°C after 20 rounds of ice making.

[0086] Ice making effect of scheme 1 (see Figure 4 The first round of ice making produces incomplete and easily broken ice cubes. From the second to fourth rounds, the ice cubes are thin, poorly compacted, and unstable. Only after the fifth round can rounded, complete, and dense ice cubes be obtained. As the number of ice making cycles increases, the ice quality improves.

[0087] Solution 2 (embodiment of this application): Water tank A (300ml) is the ice making water tank 100, and container B is the first container 200; First round of ice making: The ice making water tank 100 receives 300 ml of room temperature water at 25°C delivered by the first container 200; Ice making: The ice maker 420 starts to lower the water temperature in the ice making water tank 100. It takes 2 minutes to lower the 25°C room temperature water to 0°C. Ice making starts 2 minutes later. The water in the ice making water tank 100 freezes on the ice maker 420. The actual time used for ice making is 6 minutes.

[0088] Water replenishment step: After ice making is completed, 35 ml of ice is consumed, and 265 ml of residual water at a temperature close to 0°C remains in the ice making water tank 100. The 265 ml of residual water is discharged into the first container 200, and 35 ml of room temperature water (i.e., replenishing water) is added to the first container 200 to mix with the residual water to make up for the water consumed in the previous round of ice making. The temperature of the mixed water is slightly higher than that of the residual water, and the water temperature of the mixed water is close to 15°C.

[0089] Second round of ice making: The ice making tank 100 receives mixed water with a water temperature close to 15°C. Ice making and drainage are carried out in the same manner. It takes less than 2 minutes to reduce the mixed water temperature close to 15°C to 0°C, and the actual ice making time is more than 6 minutes. From the second round onwards, the initial temperature of the ice-making water in the ice-making water tank 100 is significantly reduced.

[0090] According to the second solution, after the first round of ice making, the temperature of the remaining water is close to 0°C. Based on 1°C, the temperature of the remaining water (about 265ml, about 1°C) after mixing with the added room temperature water (about 35ml, about 25°C) is calculated using the aforementioned heat balance equation (rounded to two decimal places):

[0091] Similarly, after the second round of ice making is completed, calculate the water temperature after the remaining water (about 265 ml, about 1°C) is mixed with the room temperature water (about 35 ml, about 25°C) added to the ice making water tank 100 from container B (rounded to two decimal places):

[0092] Similarly, the theoretical temperature of the mixed ice-making water after each ice-making round after the second round is 3.8°C. Therefore, with the residual water recycling method in Option 2, starting from the second round, the theoretical temperature of the mixed ice-making water (calculated using the aforementioned heat balance equation) is close to 3.8°C.

[0093] According to the actual measurement results of Scheme 2, after the first round of ice making, the measured water temperature of the mixed water obtained after adding the make-up water is 14.8℃; after the 2nd to 5th rounds of ice making, the measured values ​​of the initial temperature of the water used for ice making are: 14.8℃, 11.9℃, 8.5℃, 7.6℃, and 6.7℃ respectively; after the 5th round of ice making, the temperature of the mixed water can be maintained at around 6.5℃.

[0094] It is understandable that the temperature of some internal structures of the ice maker or the heat generated by some components during operation may affect the internal ambient temperature of the ice maker, thereby affecting the temperature of the remaining water in the ice making process to a certain extent. For example, the temperature of the first container 200 for the remaining water, the temperature of the ice basket for holding ice cubes or the temperature of the second container 300 for storing room temperature water, the temperature of the channel through which the remaining water passes when it returns to the first container 200 or the second container 300, the internal ambient temperature of the ice maker, or the ambient temperature formed by the connection between the interior of the ice maker and the external environment, etc. The temperature of these structures or environments will generally remain close to room temperature or higher in the early stage of ice making. Under the influence of these factors, the temperature of the remaining water in the ice making process will increase to a certain extent. As the number of ice making rounds increases, the temperature of the various internal structures of the ice maker will gradually decrease, thereby reducing the impact on the temperature of the remaining water. Therefore, there is a certain deviation between the measured data and the theoretical data for the corresponding number of rounds of each scheme in the above comparative experiment. According to the theoretical data and measured data of Scheme 2 of the embodiment of the present application, it shows its obvious advantages in the early stage of ice making. In actual applications, according to actual measurements, after multiple rounds of ice making in Scheme 2, the temperature of the remaining water will gradually decrease in the early stages of ice making (rounds 2 to 5). Therefore, the initial temperature of the ice-making water obtained by adding a small amount of supplementary water in each round will also gradually decrease, allowing the ice to freeze faster in the early stages than in Scheme 1. After the fifth round, the initial temperature of each round of ice making can be maintained at a low temperature, thus shortening the cycle of each round of ice making.

[0095] Compared with the above-mentioned plan 1, the optimization effect of plan 2 can be clearly seen. Before the 14th ice making, the temperature of the mixed water after each round of ice making in plan 2 is significantly lower than that in plan 1. That is to say, the initial temperature of the ice-making water obtained by mixing at the end of each round before the next round of ice making is significantly lower. Specifically, starting from the second round of ice making, the theoretical value of the initial temperature of the ice-making water in plan 2 can reach 3.8°C. The theoretical value and measured value of the initial temperature of the ice-making water in the 2nd to 5th rounds are significantly lower than the data of the corresponding rounds of plan 1. After the 5th round of ice making, the temperature of the mixed water can be maintained at about 6.5°C. Therefore, starting from the second round of ice making, the quality of ice produced in the early stage of ice making in plan 2 is better, and the ice shape is full and the density is good (see details). Figure 5 ).

[0096] Comparison of ice making effects between Scheme 1 and Scheme 2 (see Figure 5 , where the "old solution" corresponds to the ice-making effect diagram of Solution 1, and the "new solution" corresponds to the ice-making effect diagram of Solution 2): Solution 1 (comparative example): In the first round of ice making, the ice cubes are incomplete and easy to break; in the second to fourth rounds, the ice cubes are thin, poor in density, and unstable in shape; it is not until the fifth round of ice making that round, complete, and well-dense ice cubes are obtained.

[0097] Option 2 (an embodiment of the present application): In the first round of ice making, the ice cubes are incomplete and easily broken; from the start of the second round of ice making, round, complete, and dense ice cubes can be obtained. The subsequent ice making effect is stable, and the quality of the ice cubes is relatively consistent, which verifies the advantage of this method in recycling the remaining water and fully demonstrates the superiority of this method in the early stage of ice making.

[0098] The ice-making water circulation method, ice-making method, and ice-making machine of the embodiments of the present application effectively address the problem of conventional ice-making machines returning unfrozen residual water to a constant-temperature water tank, resulting in a high initial temperature of the ice-making water, which requires a long cooling period before freezing begins, resulting in a short actual freezing time and poor ice quality (loose structure and easy melting). By separately storing the low-temperature residual water remaining after ice making and mixing it with a small amount of make-up water, the embodiments of the present application effectively lower the initial temperature of the water used in the next round of ice making. The embodiments of the present application are suitable for scenarios requiring multiple rounds of continuous ice making and offer significant advantages for producing ice cubes with high-quality shapes, such as bullet ice, by optimizing the quality of the initial ice production. The embodiments of the present application fully utilize the low-temperature characteristics of the residual water, contributing to energy conservation and consumption reduction.

[0099] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A method for circulating water for ice making, characterized in that: The following steps are involved: Water filling step: before starting a round of ice making, ice making water is filled in the ice making water tank so that the ice making water is used to make ice in the ice making water tank; Collecting step: after completing a round of ice making, draining the remaining unfrozen water in the ice making water tank out of the ice making water tank, and storing the remaining water separately in a first container, wherein the first container is separated from the ice making water tank; Water replenishment step: introducing replenishment water to replenish the ice-making water consumed in the previous round of ice-making, wherein the volume of the replenishment water is smaller than the volume of the remaining water, and the replenishment water is mixed with the remaining water to obtain the ice-making water for the next round of ice-making; The water filling step, the collecting step, and the water replenishing step are cycled.

2. The ice making water circulation method according to claim 1, characterized in that: In the water replenishing step, the replenishing water is introduced according to the consumption of the ice-making water in the previous round of ice-making.

3. The ice making water circulation method according to claim 2, characterized in that: The consumption is determined based on the liquid level of the ice making water tank before the start of the previous round of ice making, or based on the change in the liquid level of the ice making water tank before and after the start of the previous round of ice making; the amount of the supplementary water is equal to the consumption.

4. The ice making water circulation method according to claim 1, characterized in that: In the water replenishing step: the replenishing water is mixed with the remaining water in the first container and / or the ice-making water tank; or the remaining water is introduced into the ice-making water tank, and the replenishing water is mixed with the remaining water during the process of introducing the remaining water into the ice-making water tank.

5. The ice making water circulation method according to claim 1, characterized in that: The water is stored in a second container, and the second container is separated from the first container and the ice making water tank; wherein: In the water filling step, before starting the first round of ice making, the stored water is transported from the second container to the ice making water tank as the ice making water for the first round of ice making; And / or, in the water replenishing step, the stored water is introduced from the second container as the replenishing water.

6. The ice making water circulation method according to claim 5, characterized in that: Before starting the first round of ice making, the method of transporting the stored water from the second container to the ice making water tank includes: introducing the stored water from the second container into the first container, and then introducing the stored water from the first container into the ice making water tank; or, directly introducing the stored water from the second container into the ice making water tank.

7. An ice making method, characterized in that: The ice making method comprises: The ice-making water circulation method according to any one of claims 1 to 6 is used to supply the ice-making water to the ice-making water tank, and perform multiple rounds of ice making in a cycle; In each round of ice making, an ice maker is immersed in the ice making water in the ice making water tank to cool the ice making water, so that part of the ice making water is frozen into ice on the ice maker, and part of the ice making water is not frozen and forms residual water.

8. The ice making method according to claim 7, wherein: Starting from the second round of ice making, in each round of ice making, the thickness of the ice frozen on the ice maker is detected by a detector, and when the thickness reaches a set thickness, the current round of ice making is stopped.

9. The ice making method according to claim 7, wherein: After each round of ice making is completed and before the next round of ice making begins the water filling step, the remaining unfrozen water in the ice making water tank is first drained out of the ice making water tank, and then the ice maker is heated to separate the frozen ice on the ice maker from the ice maker.

10. Ice making machine, characterized in that, For implementing the ice-making method according to any one of claims 7 to 9, the ice-making machine comprises: Ice making water tank, used to hold water for making ice; An ice-making assembly, comprising an evaporator and an ice maker, wherein the ice maker is connected to one side of the evaporator so that the ice maker can be immersed in the ice-making water, the evaporator is used to introduce cold energy to cool the ice maker, and the ice maker is used to cool the ice-making water so that a portion of the ice-making water freezes into ice on the ice maker; a first container, disposed separately from the ice making water tank, for storing unfrozen residual water discharged from the ice making water tank; a first pump connected to the ice-making water tank and the first container for transporting residual water or water for ice making; The second pump is connected to the ice-making water tank and / or the first container and is used to deliver supplementary water.

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