Refrigeration waste heat cycle water spray thawing device and method and cold storage

Abstract

The application discloses a refrigeration waste heat circulating water spraying thawing device, method and cold storage. The device comprises a refrigeration system and a water circulating system. The refrigeration system comprises a compressor, a condenser, a throttling element and an evaporator. The water circulating system comprises a water collecting tray, a water storage tank, a water supply pump, a first heat exchange unit, a second heat exchange unit, a spraying unit and a water return unit. The water collecting tray collects defrosting water or condensate water generated by the evaporator and introduces the water into the water storage tank. The circulating water is isolated from the heat exchange of the compressor exhaust pipe through the first heat exchange unit, and then isolated from the heat exchange of the evaporator suction side low temperature pipeline through the second heat exchange unit. Subsequently, the circulating water is sprayed to the food to be thawed by the spraying unit, and the sprayed circulating water is returned to the water storage tank. The application can utilize the operation resources of the refrigeration system to participate in the thawing of food, and reduce the dependence on external water supply and independent heat exchange equipment.

Description

Technical Field

[0001] This invention relates to the field of food thawing equipment technology, and in particular to a refrigeration waste heat circulating water thawing device, method, and cold storage. Background Technology

[0002] Frozen foods typically require thawing before processing or cooking in restaurant kitchens, central kitchens, food processing facilities, and cold storage environments. While traditional methods such as room temperature thawing, refrigerated thawing, water immersion thawing, running water thawing, and microwave thawing can thaw food, they still have varying degrees of shortcomings in terms of thawing efficiency, water consumption, control of food surface temperature, and thawing uniformity. Therefore, improving the thawing efficiency of frozen foods through equipment-based methods, while reducing the water consumption and hygiene issues associated with continuous running water or prolonged immersion, has become a key technical requirement to be addressed in the food thawing equipment industry.

[0003] To address the aforementioned needs, various spray-type or circulating water-type thawing devices have been disclosed in the existing technology. For example, technical solutions related to spray thawing, circulating water, water collection and return, or rapid thawing have been disclosed. These solutions enable water to come into contact with frozen food and participate in the thawing process by setting up spray structures, water collection structures, water tanks, water pumps, or circulating water circuits. This can improve the low efficiency of traditional static thawing or soaking thawing to a certain extent.

[0004] However, for applications such as cold storage facilities supporting catering equipment, central kitchens, or cold storage, existing spray-type or circulating water defrosting solutions are mainly designed around the defrosting equipment's own water tank, water pump, spray structure, and circulating water circuit. They typically do not establish a structural coordination between the defrosting circulating water circuit and the water resources, waste heat resources, and low-temperature resources generated during the refrigeration system's operation. Specifically, during refrigeration system operation, defrosting water or condensate is generated at the evaporator, the compressor exhaust pipe has a high temperature, and the low-temperature pipe on the evaporator suction side has a low temperature; all of these resources have the potential to participate in circulating water replenishment, heat exchange, or temperature regulation. However, existing spray-type or circulating water defrosting solutions mostly set up the defrosting equipment independently from the refrigeration equipment, failing to introduce evaporator defrosting water or condensate into the defrosting circulating water circuit, nor utilizing the waste heat on the compressor exhaust side and the low-temperature resources on the evaporator suction side for heat exchange treatment of the circulating water.

[0005] Furthermore, some existing solutions require heating the thawing water using hot water tanks, electric heaters, or other independent heat sources, which can easily increase the additional energy consumption of the thawing equipment. Although some circulating water thawing solutions can achieve the recycling and reuse of spray water, the circulating water source still mainly relies on external water supply, failing to fully utilize the defrosting water or condensate generated during the operation of the refrigeration system. At the same time, after repeated contact with frozen food, the circulating water may carry blood, debris, grease, or microorganisms. Without control measures that are coordinated with water quality testing, sterilization treatment, and water replenishment and drainage, there may still be hygiene and safety risks when the circulating water is reused for a long time. In addition, different types and weights of frozen food have different requirements for spray water temperature and thawing time, and there is still room for improvement in the adaptive control of spray water temperature and thawing process in existing solutions. Summary of the Invention

[0006] To address the problem that existing spray-type or circulating water defrosting devices fail to effectively integrate refrigeration system operating resources with circulating spray defrosting water circuits, resulting in circulating water treatment relying on external water sources or independent heat exchange structures, one objective of this invention is to provide a refrigeration waste heat circulating water defrosting device. To achieve the above objectives, the present invention adopts the following technical solution: a refrigeration waste heat circulating water shower defrosting device, comprising a refrigeration system and a water circulation system; The refrigeration system includes a compressor, a condenser, a throttling element, and an evaporator connected in sequence to form a refrigerant circuit. The compressor has an exhaust pipe, and the evaporator has a low-temperature suction pipe. The water circulation system includes a water receiving tray, a water storage tank, a water supply pump, a first heat exchange unit, a second heat exchange unit, a spray unit, and a return water unit; The water receiving tray is located below the evaporator, and the outlet of the water receiving tray is connected to the water storage tank to guide the defrosting water or condensate generated by the evaporator into the water storage tank. The outlet of the water storage tank is connected to the inlet of the first heat exchange unit through the water supply pump. The first heat exchange unit is isolated from the exhaust pipe of the compressor for heat exchange. The outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit via a water passage, and the second heat exchange unit is isolated from the low-temperature pipeline on the suction side of the evaporator for heat exchange. The outlet of the second heat exchange unit is connected to the spray unit; The water return unit is located below the spray unit and is connected to the water storage tank to return the circulating water after spraying to the water storage tank.

[0007] Furthermore, the water storage tank is equipped with a high liquid level sensor, a low liquid level sensor, a water supply valve, and a drain valve. The water supply valve is connected to an external water supply pipeline, and the drain valve is connected to a drain pipeline.

[0008] Furthermore, it also includes a control unit, wherein the high liquid level sensor, the low liquid level sensor, the water supply valve, the drain valve, and the water supply pump are electrically connected to the control unit; the control unit is used to control the water supply valve to open when the low liquid level sensor detects that the water level in the storage tank is lower than the low liquid level, and is used to control the water supply valve to close and the drain valve to open when the high liquid level sensor detects that the water level in the storage tank has reached the high liquid level.

[0009] Furthermore, a filter is provided between the water supply pump and the first heat exchange unit, with the inlet of the filter connected to the outlet of the water supply pump and the outlet of the filter connected to the inlet of the first heat exchange unit.

[0010] Furthermore, the first heat exchange unit includes a first heat exchange coil, which is arranged adjacent to, fitted to, sleeved on, or wrapped around the exhaust pipe of the compressor. The circulating water channel in the first heat exchange coil is isolated from the refrigerant channel in the exhaust pipe of the compressor.

[0011] Furthermore, the second heat exchange unit includes a second heat exchange coil, which is arranged adjacent to, fitted to, sleeved on, or wound around the suction side low-temperature pipeline of the evaporator. The circulating water channel in the second heat exchange coil is isolated from the refrigerant channel in the suction side low-temperature pipeline.

[0012] Furthermore, the device also includes a sterilization unit located downstream of the first heat exchange unit, the sterilization unit including an ultraviolet sterilizer; a first temperature sensor is provided at the exhaust pipe of the compressor; the device also includes a control unit, the control unit being electrically connected to the first temperature sensor and the ultraviolet sterilizer respectively, and configured to: activate the ultraviolet sterilizer when the compressor exhaust temperature detected by the first temperature sensor is lower than a preset sterilization temperature threshold.

[0013] Furthermore, the sterilization unit is disposed between the first heat exchange unit and the second heat exchange unit, and the preset sterilization temperature threshold is 95°C.

[0014] Furthermore, an air-cooled heat exchanger is provided between the sterilization unit and the second heat exchange unit. The inlet of the air-cooled heat exchanger is connected to the outlet of the sterilization unit, and the outlet of the air-cooled heat exchanger is connected to the inlet of the second heat exchange unit.

[0015] Furthermore, the second heat exchange coil is disposed at the suction side gas collecting pipe of the evaporator, and an insulation layer is disposed on the outside of the second heat exchange coil.

[0016] Furthermore, a water quality sensor is provided between the sterilization unit and the second heat exchange unit, and the water quality sensor is electrically connected to the control unit; The control unit is further configured to: activate the ultraviolet sterilizer when the water quality parameters detected by the water quality sensor do not meet the preset water quality safety conditions; and if the water quality parameters continue to fail to meet the preset water quality safety conditions for a preset duration after the ultraviolet sterilizer is activated, control the water supply pump to stop running and / or control the drain valve to open.

[0017] Furthermore, the spray unit includes a spray platform and a spray head disposed above the spray platform, and the outlet of the second heat exchange unit is connected to the spray head; a second temperature sensor is disposed on the water inlet side of the spray head, and the control unit is electrically connected to the second temperature sensor and the water supply pump respectively, and is configured to: adjust the operating parameters of the water supply pump according to the deviation between the water temperature detected by the second temperature sensor and the target spray water temperature range.

[0018] Furthermore, the spray table is equipped with a weight sensor, and a visual recognition camera is installed above the spray table. The weight sensor and the visual recognition camera are electrically connected to the control unit. The control unit is used to determine the defrosting time and the target spray water temperature range based on the food type information obtained by the visual recognition camera and the food weight information obtained by the weight sensor. To achieve the above objectives, the present invention adopts the following technical solution: a method for defrosting by circulating water spraying of refrigeration waste heat, using the aforementioned refrigeration waste heat circulating water spraying defrosting device, and operating according to the following steps: The defrosting water or condensate produced by the evaporator is collected by a drip tray located below the evaporator and then directed to a water storage tank. Obtain the type and weight of the food to be thawed, and determine the target spray water temperature range and preset thawing time based on the type and weight of the food to be thawed; The circulating water in the water storage tank is transported to the first heat exchange unit, so that the circulating water is isolated from the compressor's exhaust pipe for heat exchange; Based on the exhaust temperature of the compressor and / or the water quality parameters of the circulating water, the circulating water after heat exchange in the first heat exchange unit is sterilized. The sterilized circulating water is transported to the second heat exchange unit, so that the circulating water is isolated from the low-temperature pipeline on the suction side of the evaporator for heat exchange, and the water temperature of the circulating water enters the target spray water temperature range. Circulating water that has entered the target spray water temperature range is sprayed onto the food to be thawed through the spray unit, and the operating parameters of the water supply pump are adjusted according to the deviation between the real-time detected spray water temperature and the target spray water temperature range during the spraying process. Collect the circulating water after spraying and return it to the water storage tank.

[0019] Meanwhile, the present invention also provides a cold storage, including a cold storage body and a refrigeration waste heat circulating water shower defrosting device installed in the cold storage body, which employs the above-described refrigeration waste heat circulating water shower defrosting device.

[0020] Beneficial effects: 1. The defrosting water or condensate generated by the evaporator is guided into the water storage tank through the water receiving tray. The circulating water then passes sequentially through the first heat exchange unit that is connected to the compressor exhaust pipe, the second heat exchange unit that is connected to the low-temperature pipe on the evaporator suction side, and the spray unit. This combines the water resources, waste heat resources, and low-temperature resources of the refrigeration system with the food spraying and defrosting process. At the same time, the circulating water after spraying is returned to the water storage tank through the return water unit, forming a circulating water path. This reduces the need for external water replenishment and continuous drainage, and reduces the reliance on separate heating or cooling equipment.

[0021] 2. By installing high-level sensors, low-level sensors, water supply valves, and drain valves in the water storage tank, the tank is equipped with water level detection, external water supply, and drainage regulation capabilities. This can prevent unstable water supply due to insufficient circulating water volume and overflow caused by excessively high water levels, thereby improving the reliability of the circulating water system.

[0022] 3. By electrically connecting the control unit to the high liquid level sensor, low liquid level sensor, water supply valve, water drain valve and water supply pump, the water supply tank replenishment, drainage and water pump operation can be automatically controlled according to the liquid level detection results, reducing manual observation and manual replenishment and drainage operations, and reducing the risk of water supply pump running dry due to low water level.

[0023] 4. By installing a filter between the water supply pump and the first heat exchange unit, food scraps, impurities, or particulate matter can be intercepted before the circulating water enters the heat exchange unit, reducing the possibility of blockage in the first heat exchange unit, the second heat exchange unit, and the spray unit, and reducing the impact of impurities in the circulating water on the subsequent sterilization and heat exchange processes.

[0024] 5. By setting the first heat exchange coil adjacent to, attached to, nested around, or wrapped around the compressor discharge pipe, and by isolating the circulating water channel from the refrigerant channel, the waste heat from the compressor discharge side can be used to treat the circulating water for heat exchange without changing the state of the refrigerant circuit medium or allowing the circulating water to come into direct contact with the refrigerant, thereby improving the utilization rate of refrigeration waste heat.

[0025] 6. By setting the second heat exchange coil adjacent to, attached to, sleeved to, or wrapped around the low-temperature pipeline on the suction side of the evaporator, and by isolating the circulating water channel from the refrigerant channel, the low-temperature resources of the evaporator can be used to cool and exchange heat for the circulating water. This makes it easier for the circulating water to reach the target spray water temperature range suitable for food thawing before entering the spray unit, while avoiding direct contact between the circulating water and the refrigerant.

[0026] 7. By setting a sterilization unit including an ultraviolet sterilizer downstream of the first heat exchange unit, and detecting the compressor exhaust temperature through a first temperature sensor, the control unit can activate the ultraviolet sterilizer for supplementary sterilization when the compressor exhaust temperature is insufficient. This avoids insufficient sterilization due to insufficient temperature when relying solely on exhaust waste heat for sterilization, thereby improving the stability of circulating water sanitation treatment.

[0027] 8. By setting the sterilization unit between the first heat exchange unit and the second heat exchange unit, and limiting the preset sterilization temperature threshold to 95℃, the circulating water can enter the sterilization judgment and treatment stage in a timely manner after passing through the waste heat exchange of the compressor exhaust. This allows the waste heat sterilization and ultraviolet supplementary sterilization to form a clearer connection, thereby improving the targeting of circulating water sterilization control.

[0028] 9. By installing an air-cooled heat exchanger between the sterilization unit and the second heat exchange unit, the circulating water after being treated by the first heat exchange unit and the sterilization unit can be pre-cooled before entering the second heat exchange unit to exchange heat with the low-temperature pipeline on the suction side of the evaporator. This reduces the impact of high-temperature circulating water directly entering the second heat exchange unit on the suction side temperature of the refrigeration system and helps to reduce the cooling load of the second heat exchange unit.

[0029] 10. By placing the second heat exchange coil at the suction side of the evaporator's gas collection pipe, the heat exchange contact effect between the second heat exchange coil and the low-temperature pipeline can be improved; by setting an insulation layer on the outside of the second heat exchange coil, the loss of cold energy during the heat exchange process can be reduced, making the cooling process of the circulating water more stable and helping to maintain the spray water temperature.

[0030] 11. By installing a water quality sensor between the sterilization unit and the second heat exchange unit, and enabling the control unit to control the ultraviolet sterilizer, water supply pump, and drain valve according to the water quality parameters, the water quality status of the circulating water after multiple contact with food can be monitored. When the circulating water does not meet the preset water quality safety conditions, sterilization, pump shutdown, or drainage can be performed to reduce the possibility of food safety risks caused by long-term reuse of circulating water.

[0031] 12. By setting up a spray table, spray head, and a second temperature sensor located on the water inlet side of the spray head, the circulating water can act on the food to be thawed in a spraying manner, and the water temperature can be detected before spraying; the control unit adjusts the operating parameters of the water supply pump according to the deviation between the detected water temperature and the target spray water temperature range, which can improve the accuracy of spray water temperature control and reduce the impact of excessively high or low water temperature on thawing efficiency and food quality.

[0032] 13. By installing a weight sensor on the spray table and a visual recognition camera above the spray table, the control unit can obtain information on the type and weight of the food to be thawed, and determine the thawing time and target spray water temperature range accordingly. This reduces the error of manually setting thawing parameters based on experience and improves the consistency and adaptability of thawing control for different foods.

[0033] 14. By sequentially performing steps such as defrosting water or condensate collection, obtaining the type and weight of ingredients, heat exchange of waste heat from compressor exhaust, sterilization treatment, low-temperature heat exchange of evaporator, spray defrosting, and return water circulation, the water resources, waste heat resources, and low-temperature resources generated during the operation of the refrigeration system can participate in the circulating water spray defrosting process; at the same time, combined with spray water temperature detection and water supply pump adjustment, the continuity of circulating water treatment, spray temperature control, and return water circulation can be improved.

[0034] 15. By installing a refrigeration waste heat circulating water thawing device inside the cold storage unit, the cold storage unit can not only achieve low-temperature storage of frozen food, but also utilize the defrosting water or condensate generated during the operation of its own refrigeration system, the waste heat from the compressor exhaust, and the low-temperature resources of the evaporator to thaw the food through circulating water thawing. This improves the integration between the cold storage refrigeration system and the thawing function, and reduces the dependence of independent thawing equipment on external water sources and independent heat exchange structures. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a refrigeration waste heat circulating water condensation defrosting device according to the present invention.

[0036] Figure 2 This is a control flowchart of a refrigeration waste heat circulating water condensation defrosting method according to the present invention.

[0037] Figure 3 This is a simplified flowchart of a refrigeration waste heat circulating water condensation defrosting method according to the present invention.

[0038] In the diagram: A001, Compressor; A002, Condenser; A003, Electronic Expansion Valve; A004, Evaporator; A005, First Temperature Sensor; B001, Water Drawer; B002, Water Tank; B003, Drain Valve; B004, Water Supply Pump; B005, Filter; B006, First Heat Exchange Coil; B007, Ultraviolet Sterilizer; B008, Water Quality Sensor; B009, Air-Cooled Heat Exchanger; B010, Second Heat Exchange Coil; B011, Spray Head; B012, Spray Table; B013, Weight Sensor; B014, Return Water Drawer; B015, Return Water Pump; B016, High Liquid Level Sensor; B017, Low Liquid Level Sensor; B018, Water Intake Valve; B019, Visual Recognition Camera; B020, Second Temperature Sensor. W2 represents the compressor exhaust temperature, W3 represents the water temperature detected at the front end of the spray head, W represents the target spray water temperature, and W4 represents the allowable temperature deviation. Detailed Implementation

[0039] To make the objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example 1 Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a refrigeration waste heat circulating water defrosting device. This device utilizes defrosting water or condensate generated during the operation of the refrigeration system, compressor exhaust waste heat, and low-temperature resources on the evaporator suction side to collect, exchange heat, spray, and recycle circulating water. It includes a refrigeration system and a water circulation system. The refrigeration system provides compressor exhaust waste heat and evaporator suction side low-temperature resources; the water circulation system allows the circulating water to be collected, supplied, exchanged, sprayed, and recycled sequentially. The device also includes a control unit, which can be a microcontroller, PLC controller, or other control device capable of receiving sensor signals and controlling the actions of the actuators.

[0042] Specifically, the refrigeration system includes compressor A001, condenser A002, a throttling element, and evaporator A004. The throttling element can be an electronic expansion valve A003. Compressor A001, condenser A002, electronic expansion valve A003, and evaporator A004 are sequentially connected to form a refrigerant circuit. Compressor A001 has a discharge pipe, which forms a high-temperature pipeline during the operation of the refrigeration system. Evaporator A004 has a low-temperature suction side pipeline, which includes the evaporator gas collecting pipe, and forms a low-temperature pipeline during the operation of the refrigeration system. By setting up the discharge pipe of compressor A001, waste heat on the discharge side can be provided to the circulating water; by setting up the low-temperature suction side pipeline of evaporator A004, low-temperature heat exchange conditions can be provided to the circulating water.

[0043] Furthermore, the water circulation system includes a water receiving tray B001, a water storage tank B002, a water supply pump B004, a first heat exchange coil B006, a second heat exchange coil B010, a spray head B011, a spray table B012, a return water receiving tray B014, and a return water pump B015. The water receiving tray B001 is located below the evaporator A004, and its outlet is connected to the water storage tank B002. By providing the water receiving tray B001, it can collect the defrost water or condensate generated by the evaporator A004 and channel it into the water storage tank B002 as one of the sources of water for the circulating spray system.

[0044] The water outlet of the water storage tank B002 is connected to the inlet of the first heat exchange coil B006 via the water supply pump B004. The first heat exchange coil B006 is isolated from the exhaust pipe of the compressor A001 for heat exchange. The water outlet of the first heat exchange coil B006 is connected to the inlet of the second heat exchange coil B010 via a water circuit. The second heat exchange coil B010 is isolated from the low-temperature pipeline on the suction side of the evaporator A004 for heat exchange. The water outlet of the second heat exchange coil B010 is connected to the spray head B011, which is positioned above the spray table B012. Through this configuration, the circulating water in the water storage tank B002, under the action of the water supply pump B004, passes sequentially through the first heat exchange coil B006, the second heat exchange coil B010, and the spray head B011, and is sprayed onto the food to be thawed placed on the spray table B012.

[0045] Preferably, the return water receiving tray B014 is located below the spray station B012, and the outlet of the return water receiving tray B014 is connected to the water storage tank B002 via the return water pump B015. By setting up the return water receiving tray B014 and the return water pump B015, the circulating water flowing down from the surface of the food after spraying can be collected and returned to the water storage tank B002, thus forming a circulating water path.

[0046] Working Principle: During refrigeration system operation, defrosting water or condensate produced by evaporator A004 is collected by drip tray B001 and enters water storage tank B002. After the food to be thawed is placed on spray station B012, water pump B004 delivers circulating water from water storage tank B002 to first heat exchange coil B006. The circulating water in first heat exchange coil B006 exchanges heat with the exhaust pipe of compressor A001, absorbing residual heat from the exhaust side of compressor A001. Subsequently, the circulating water enters second heat exchange coil B010 and exchanges heat with the low-temperature suction pipe of evaporator A004, lowering the circulating water to a temperature suitable for spray thawing. The cooled circulating water is sprayed onto the food to be thawed through spray head B011. The sprayed circulating water is collected by return water drip tray B014 and returned to water storage tank B002 via return water pump B015.

[0047] In summary, by setting up a refrigeration system and a water circulation system to work together, the defrosting water or condensate generated by the evaporator A004, the waste heat on the exhaust side of the compressor A001, and the low-temperature resources on the suction side of the evaporator A004 can all participate in the circulating water de-icing process, thus solving the problem of insufficient coordination between existing spray-type or circulating water de-icing devices and the refrigeration system's operating resources.

[0048] Example 2 Reference Figure 1 and Figure 2 This is the second embodiment of the present invention. Unlike embodiment 1, this embodiment provides a water storage tank B002, a high liquid level sensor B016, a low liquid level sensor B017, a water supply valve B018, a drain valve B003, and a filter B005, which solves the problems of unstable circulating water source, difficulty in automatically controlling the water level in the water storage tank, and impurities in the circulating water easily affecting subsequent heat exchange and spraying.

[0049] Specifically, the water storage tank B002 is equipped with a high-level sensor B016, a low-level sensor B017, a water inlet valve B018, and a drain valve B003. The water inlet valve B018 is connected to an external water supply pipeline, and the drain valve B003 is connected to a drainage pipeline. The high-level sensor B016 and low-level sensor B017 detect the water level in the water storage tank B002; the water inlet valve B018 allows for external water supply when the water level in the tank is insufficient; and the drain valve B003 drains water when the water level in the tank is too high or the water quality is abnormal.

[0050] Furthermore, the control unit is electrically connected to the high-level sensor B016, the low-level sensor B017, the water supply valve B018, the drain valve B003, and the water supply pump B004. When the low-level sensor B017 detects that the water level in the storage tank B002 is below the low level, the control unit controls the water supply valve B018 to open; and when the high-level sensor B016 detects that the water level in the storage tank B002 has reached the high level, the control unit controls the water supply valve B018 to close and the drain valve B003 to open. By setting up the control unit, automatic water supply and drainage of the storage tank B002 and operational protection of the water supply pump B004 can be achieved.

[0051] In a preferred embodiment, the capacity of the water storage tank B002 is preferably about 50L. The high-level sensor B016 is positioned at approximately 90% of the volume of the water storage tank B002, and the low-level sensor B017 is positioned at approximately 10% of the volume of the water storage tank B002. When the refrigeration system is used in conjunction with a small -18℃ cold storage unit, the daily average amount of defrosting water or condensate produced by the evaporator A004 can reach more than approximately 20L. Upon initial use, if the water level in the water storage tank B002 is lower than the low-level position, the low-level sensor B017 triggers a water replenishment action, causing the water replenishment valve B018 to open. Once the water level reaches the set level, the control unit controls the water replenishment valve B018 to close. This configuration balances the water source generated by the evaporator A004 and external water replenishment, preventing insufficient circulating water.

[0052] Preferably, a filter B005 is installed between the water supply pump B004 and the first heat exchange coil B006. The inlet of the filter B005 is connected to the outlet of the water supply pump B004, and the outlet of the filter B005 is connected to the inlet of the first heat exchange coil B006. By installing the filter B005, food debris, impurities, or particulate matter can be intercepted before the circulating water enters the first heat exchange coil B006, reducing the risk of clogging of the first heat exchange coil B006, the second heat exchange coil B010, and the spray head B011.

[0053] The rest of the structure is the same as in Example 1.

[0054] Working principle: When the refrigeration system is running, the water receiving pan B001 directs the defrosting water or condensate produced by the evaporator A004 into the water storage tank B002. If the low level sensor B017 detects that the water level is below the low level, the control unit controls the water supply valve B018 to open, replenishing water to the water storage tank B002; if the high level sensor B016 detects that the water level has reached the high level, the control unit controls the water supply valve B018 to close and controls the drain valve B003 to open. After being output by the water supply pump B004, the circulating water first passes through the filter B005 for filtration, and then enters the first heat exchange coil B006 for heat exchange.

[0055] In summary, by using the water storage tank B002, high level sensor B016, low level sensor B017, water supply valve B018, drain valve B003, and filter B005 in combination, automatic replenishment and drainage of circulating water and pre-filtration can be achieved, solving the problems of insufficient circulating water volume, overflow of water storage tank B002, and impurities affecting heat exchange spraying.

[0056] Example 3 Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Unlike embodiment 2, this embodiment provides a first heat exchange coil B006, an ultraviolet sterilizer B007, a first temperature sensor A005, a water quality sensor B008, an air-cooled heat exchanger B009, and a second heat exchange coil B010, which solves the problems of the need for independent heating of circulating water, insufficient sterilization stability, and reliance on an independent cooling structure for cooling.

[0057] Specifically, the first heat exchange coil B006 is arranged adjacent to, fitted to, nested around, or wrapped around the discharge pipe of the compressor A001, and the circulating water channel in the first heat exchange coil B006 is isolated from the refrigerant channel in the discharge pipe of the compressor A001. By setting the first heat exchange coil B006, the circulating water can absorb the waste heat on the discharge side of the compressor A001 without directly contacting the refrigerant.

[0058] In a preferred embodiment, the first heat exchange coil B006 is preferably made of 316L stainless steel seamless tubing. The first heat exchange coil B006 is wound or attached to the outside of the exhaust pipe of the compressor A001 in a tightly spiral manner. The inner diameter of the first heat exchange coil B006 is preferably about 9 mm, and the total length is preferably about 2 m. Taking a 5-horsepower unit as an example, the temperature of the circulating water entering the first heat exchange coil B006 is about 20°C, the exhaust temperature of the compressor A001 is about 95°C to 105°C, the circulating water flow rate is preferably about 2 L / min, and the outlet water temperature after heat exchange through the first heat exchange coil B006 can reach above 70°C. By setting the above parameters, the circulating water can obtain a high waste heat exchange temperature, providing conditions for subsequent heat treatment and sterilization.

[0059] Furthermore, the ultraviolet sterilizer B007 is located downstream of the first heat exchange coil B006, and a first temperature sensor A005 is installed at the exhaust pipe of the compressor A001. The control unit is electrically connected to both the first temperature sensor A005 and the ultraviolet sterilizer B007. When the first temperature sensor A005 detects that the exhaust temperature of the compressor A001 is higher than or equal to the preset sterilization temperature threshold, the circulating water can meet the heat treatment conditions after heat exchange through the first heat exchange coil B006. When the first temperature sensor A005 detects that the exhaust temperature of the compressor A001 is lower than the preset sterilization temperature threshold, the control unit activates the ultraviolet sterilizer B007 for supplementary sterilization. The preset sterilization temperature threshold is preferably 95℃, the power of the ultraviolet sterilizer B007 is preferably about 80W, the ultraviolet sterilizer B007 is continuously turned on after activation, and the circulating water flow rate is preferably maintained at about 2L / min.

[0060] The water quality sensor B008 is located between the ultraviolet sterilizer B007 and the second heat exchange coil B010, and is electrically connected to the control unit. The water quality sensor B008 is used to detect the water quality parameters of the circulating water. In a preferred embodiment, the water quality parameters include a biofluorescence value. When the biofluorescence value is less than 50 RFU, the circulating water is determined to meet preset water quality safety conditions. When the biofluorescence value is greater than or equal to 50 RFU, the control unit activates the ultraviolet sterilizer B007. If, after the ultraviolet sterilizer B007 is activated, the water quality parameters still do not meet the preset water quality safety conditions for a preset duration, the control unit controls the water supply pump B004 to stop operating and / or controls the drain valve B003 to open, thereby stopping the thawing process or discharging the circulating water that does not meet the water quality requirements.

[0061] Furthermore, an air-cooled heat exchanger B009 is positioned between the ultraviolet sterilizer B007 and the second heat exchange coil B010. The inlet of the air-cooled heat exchanger B009 is connected to the outlet of the ultraviolet sterilizer B007, and the outlet of the air-cooled heat exchanger B009 is connected to the inlet of the second heat exchange coil B010. By installing the air-cooled heat exchanger B009, the circulating water treated by the first heat exchange coil B006 and the ultraviolet sterilizer B007 can be pre-cooled, reducing the temperature of the circulating water to 30℃~40℃ before entering the second heat exchange coil B010. This reduces the heat exchange load of the second heat exchange coil B010 and minimizes the impact of the high-temperature circulating water on the low-temperature piping on the suction side of the evaporator A004.

[0062] Preferably, the second heat exchange coil B010 is arranged adjacent to, fitted to, nested within, or wound around the suction-side low-temperature pipeline of the evaporator A004, and the circulating water channel within the second heat exchange coil B010 is isolated from the refrigerant channel within the suction-side low-temperature pipeline. The second heat exchange coil B010 is preferably located at the suction-side gas collecting pipe of the evaporator A004, and an insulation layer is provided on the outer side of the second heat exchange coil B010. The temperature of the suction-side gas collecting pipe of the evaporator A004 can be -5℃ to 0℃, the temperature of the circulating water entering the second heat exchange coil B010 can be 30℃ to 40℃, and the outlet water temperature after heat exchange through the second heat exchange coil B010 can be 0℃ to 4℃. By controlling the circulating water flow rate to a relatively low range, the increase in the suction temperature of the compressor A001 can be controlled within 10℃, thereby reducing the impact on the normal operation of the refrigeration system.

[0063] The rest of the structure is the same as in Example 2.

[0064] Working principle: After passing through filter B005, the circulating water enters the first heat exchange coil B006, where it undergoes heat exchange and temperature rise with the exhaust pipe of compressor A001. The first temperature sensor A005 monitors the exhaust temperature of compressor A001 in real time. When the exhaust temperature is below 95℃, the control unit activates the ultraviolet sterilizer B007 for supplementary sterilization. After sterilization, the circulating water is tested by water quality sensor B008. If the water quality is unqualified, sterilization, pump shutdown, or drainage is performed. If the water quality is qualified, it enters the air-cooled heat exchanger B009 for pre-cooling, and then enters the second heat exchange coil B010 for heat exchange with the low-temperature pipeline on the suction side of evaporator A004, thus reducing the circulating water temperature to the target spray water range.

[0065] In summary, by using the first heat exchange coil B006, ultraviolet sterilizer B007, first temperature sensor A005, water quality sensor B008, air-cooled heat exchanger B009, and second heat exchange coil B010 in combination, the waste heat from the compressor A001 exhaust can be used to heat the circulating water, and the low-temperature resources on the suction side of the evaporator A004 can be used to cool the circulating water. At the same time, sterilization control is performed based on the exhaust temperature and water quality parameters, thus solving the problem of circulating water treatment relying on independent heat sources, independent cooling structures, and manual water quality judgment.

[0066] Example 4 Reference Figure 1 and Figure 2 This is the fourth embodiment of the present invention. Unlike embodiment 3, this embodiment provides a spray head B011, a spray table B012, a weight sensor B013, a visual recognition camera B019, and a second temperature sensor B020, which solves the problems of relying on manual experience to set the thawing parameters for different ingredients and insufficient accuracy in controlling the spray water temperature.

[0067] Specifically, the spray table B012 is used to hold the food to be thawed, and the spray head B011 is located above the spray table B012. The outlet of the second heat exchange coil B010 is connected to the spray head B011. By setting the spray head B011, the circulating water after low-temperature heat exchange in the second heat exchange coil B010 can be sprayed onto the surface of the food to be thawed. There can be one or more spray heads B011, and multiple spray heads B011 can be arranged at intervals along the top of the spray table B012 to improve the spray coverage area.

[0068] Furthermore, a second temperature sensor B020 is installed on the water inlet side of the spray head B011. The second temperature sensor B020 is electrically connected to the control unit, which is also electrically connected to the water supply pump B004. By installing the second temperature sensor B020, the temperature of the circulating water entering the spray head B011 can be detected. By electrically connecting the control unit to the water supply pump B004, the operating parameters of the water supply pump B004 can be adjusted according to the deviation between the detected water temperature and the target spray water temperature range. For example, the speed or flow rate of the water supply pump B004 can be adjusted to make the spray water temperature approach the target spray water temperature range.

[0069] The spray station B012 is equipped with a weight sensor B013, and a visual recognition camera B019 is installed above the spray station B012. Both the weight sensor B013 and the visual recognition camera B019 are electrically connected to the control unit. The weight sensor B013 acquires the weight of the food to be thawed; the visual recognition camera B019 acquires image information of the food and identifies its type. Based on the food type information acquired by the visual recognition camera B019 and the weight information acquired by the weight sensor B013, the control unit determines the thawing time and the target spray water temperature range.

[0070] The control unit can access the following preset parameter table:

[0071] In one specific application, the visual recognition camera B019 identifies the food to be thawed as red meat, the weight sensor B013 detects a weight of 2 kg, the initial temperature of the food is -18℃, the target core temperature is set to +2℃~+4℃, the target spray water temperature range is set to 0℃~2℃, the recommended ice water flow rate is set to 1.2L / min, and the preset thawing time is set to 30 minutes. This setting allows for the automatic determination of spray water temperature, flow rate, and thawing time based on different food types and weights, reducing errors from manual settings.

[0072] The remaining structure is the same as in Example 3.

[0073] Working principle: After the food to be thawed is placed on the spray station B012, the visual recognition camera B019 captures an image of the food and sends it to the control unit, while the weight sensor B013 detects the weight of the food and sends it to the control unit. The control unit calls upon corresponding parameters based on the type and weight of the food to determine the target spray water temperature range, recommended ice water flow rate, and preset thawing time. Circulating water is cooled by the second heat exchange coil B010 before entering the spray head B011. The second temperature sensor B020 detects the water temperature at the inlet of the spray head B011. When the water temperature deviates from the target spray water temperature range, the control unit adjusts the operating parameters of the water supply pump B004 to bring the spray water temperature closer to the target range.

[0074] In summary, by using the spray head B011, spray table B012, weight sensor B013, visual recognition camera B019, and second temperature sensor B020 in combination, the target spray water temperature range and defrosting time can be determined according to the type and weight of the food. The water supply pump B004 can be adjusted according to the water temperature before spraying, thus solving the problems of inaccurate manual setting of defrosting parameters for different foods and insufficient precision in spray water temperature control.

[0075] Example 5 Reference Figures 1 to 3 This is the fifth embodiment of the present invention. Unlike the previous embodiments, this embodiment provides a method for defrosting by circulating water with waste heat from refrigeration, which solves the problem that existing circulating water defrosting methods rely on external water supply, independent heat source or independent cooling structure.

[0076] exist Figure 2 In the control flow shown, W2 represents the compressor exhaust temperature detected by the first temperature sensor A005, W3 represents the water temperature at the inlet of the spray head B011 detected by the second temperature sensor B020, W represents the target spray water temperature, and W4 represents the allowable temperature deviation. The control unit can adjust the operating parameters of the water supply pump B004 according to the relationship between W3 and W and W4.

[0077] Specifically, the method includes a water collection process. During refrigeration system operation, defrosting water or condensate generated by the evaporator A004 is collected by the water collection pan B001 and channeled into the water storage tank B002 through the outlet of the water collection pan B001. The water level in the water storage tank B002 is detected by a high-level sensor B016 and a low-level sensor B017. When the low-level sensor B017 detects that the water level in the water storage tank B002 is below the low level, the control unit controls the water supply valve B018 to open; when the high-level sensor B016 detects that the water level in the water storage tank B002 has reached the high level, the control unit controls the water supply valve B018 to close and controls the drain valve B003 to open.

[0078] Furthermore, the method includes a data acquisition and setting process. After the food to be thawed is placed on the spray station B012, the visual recognition camera B019 acquires an image of the food, and the weight sensor B013 acquires the weight of the food. The control unit determines the target spray water temperature range, the recommended ice water flow rate, and the preset thawing time based on the food type and weight information. The target spray water temperature range can be set according to the food category, such as red meat, poultry, seafood, and processed products.

[0079] The method includes a first heat exchange and sterilization process. The control unit activates the water supply pump B004, allowing circulating water from the storage tank B002 to enter the first heat exchange coil B006 via the water supply pump B004 and filter B005. The circulating water exchanges heat with the exhaust pipe of compressor A001 in the first heat exchange coil B006. The first temperature sensor A005 detects the exhaust temperature of compressor A001; when the exhaust temperature is higher than or equal to 95°C, the circulating water absorbs residual heat from the exhaust side of compressor A001 through the first heat exchange coil B006; when the exhaust temperature is lower than 95°C, the control unit activates the ultraviolet sterilizer B007 to supplement and sterilize the circulating water. The ultraviolet sterilizer B007 preferably has a power of approximately 80W and remains continuously running after activation, with the circulating water flow rate preferably maintained at approximately 2L / min.

[0080] Preferably, the method includes water quality detection and anomaly handling procedures. The sterilized circulating water passes through a water quality sensor B008, which detects the water quality parameters. These parameters can be biofluorescence values. A biofluorescence value less than 50 RFU indicates that the circulating water meets preset water quality safety conditions. When the biofluorescence value is greater than or equal to 50 RFU, the control unit activates the ultraviolet sterilizer B007. If, after the ultraviolet sterilizer B007 is activated, the water quality parameters still do not meet the preset water quality safety conditions for a preset duration, the control unit controls the water supply pump B004 to stop operating and / or controls the drain valve B003 to open.

[0081] Furthermore, the method includes a pre-cooling and low-temperature heat exchange process. After being treated by an ultraviolet sterilizer B007, the circulating water enters an air-cooled heat exchanger B009, which pre-cools the circulating water to 30°C–40°C. The circulating water then enters the second heat exchange coil B010, where it undergoes isolated heat exchange with the low-temperature piping on the suction side of the evaporator A004, reducing the circulating water temperature to the target spray water temperature range.

[0082] The method includes a spraying and water circulation process. Circulating water is cooled by the second heat exchange coil B010 and then enters the spray head B011. A second temperature sensor B020 detects the water temperature at the inlet of the spray head B011, and the control unit adjusts the operating parameters of the water supply pump B004 based on the deviation between the real-time detected water temperature and the target spray water temperature range. The spray head B011 sprays the circulating water onto the surface of the food to be thawed. The sprayed circulating water enters the return water collection tray B014 and is then pumped back to the water storage tank B002 by the return water pump B015 until the preset thawing time is reached, at which point the thawing process ends.

[0083] Working principle: This method first uses defrosting water or condensate generated by evaporator A004 to replenish water storage tank B002, and then determines the target spray water temperature range and preset defrosting time according to the type and weight of the food to be defrosted; then, the residual heat on the exhaust side of compressor A001 is used to perform the first heat exchange and sterilization treatment on the circulating water, and the air-cooled heat exchanger B009 and the second heat exchange coil B010 are used to pre-cool and perform low-temperature heat exchange on the circulating water. Finally, the food is sprayed and defrosted through spray head B011, and the circulating water is returned through return water receiving tray B014 and return water pump B015.

[0084] In summary, by using the above methods and steps in combination, the water resources, waste heat resources, and low-temperature resources generated during the operation of the refrigeration system can participate in the circulating water thawing process, solving the problem that existing circulating water thawing methods rely on external water supply, independent heat sources, or independent cooling structures.

[0085] Example 6 Reference Figures 1 to 3 This is the sixth embodiment of the present invention. Unlike the embodiments described above, this embodiment provides a cold storage facility that solves the problem that the freezing and thawing functions of a cold storage facility are independent of each other.

[0086] Specifically, the cold storage includes the cold storage body and a refrigeration waste heat circulation water shower defrosting device, as described in any of the above embodiments, installed within the cold storage body. The refrigeration system in this device can be the cold storage's own refrigeration system, that is, the cold storage's compressor A001, condenser A002, electronic expansion valve A003, and evaporator A004 simultaneously serve the cold storage's refrigeration / freezing and defrosting functions.

[0087] Furthermore, during cold storage operation, defrost water or condensate generated by evaporator A004 can enter water storage tank B002 through drip tray B001. Taking a small -18℃ cold storage as an example, the defrost water or condensate generated during the refrigeration system operation can be used as one of the circulating water sources, and initial water replenishment or external water replenishment can be performed through water replenishment valve B018. By setting up water storage tank B002, high liquid level sensor B016, low liquid level sensor B017, water replenishment valve B018, and drain valve B003, the defrosting water circuit in the cold storage can have automatic water replenishment and drainage control capabilities.

[0088] Working Principle: When the cold storage is used for storing frozen food, the refrigeration system operates normally. When food needs to be thawed, it is placed on the spray station B012. Defrosting water or condensate from the evaporator A004 enters the water storage tank B002. The circulating water in the water storage tank B002 passes sequentially through the first heat exchange coil B006, the ultraviolet sterilizer B007, the air-cooled heat exchanger B009, and the second heat exchange coil B010 before entering the spray head B011. The spray head B011 sprays the circulating water onto the surface of the food to be thawed. The sprayed circulating water is collected by the return water tray B014 and returned to the water storage tank B002 via the return water pump B015, thus combining the storage and thawing functions within the cold storage.

[0089] In summary, by installing a refrigeration waste heat circulating water thawing device in the cold storage, the defrosting water or condensate generated during the operation of the cold storage's own refrigeration system, the waste heat from the compressor A001 exhaust, and the low-temperature resources of the evaporator A004 can be used to thaw food through circulating water thawing. This solves the problem that the cold storage and thawing functions of the cold storage are independent of each other, and that the thawing process depends on external water supply or independent heat exchange equipment.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A refrigeration waste heat circulating water shower defrosting device, characterized in that, Including refrigeration systems and water circulation systems; The refrigeration system includes a compressor, a condenser, a throttling element, and an evaporator connected in sequence to form a refrigerant circuit. The compressor has an exhaust pipe, and the evaporator has a low-temperature suction pipe. The water circulation system includes a water receiving tray, a water storage tank, a water supply pump, a first heat exchange unit, a second heat exchange unit, a spray unit, and a return water unit; The water receiving tray is located below the evaporator, and the outlet of the water receiving tray is connected to the water storage tank to guide the defrosting water or condensate generated by the evaporator into the water storage tank. The outlet of the water storage tank is connected to the inlet of the first heat exchange unit through the water supply pump. The first heat exchange unit is isolated from the exhaust pipe of the compressor for heat exchange. The outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit via a water passage, and the second heat exchange unit is isolated from the low-temperature pipeline on the suction side of the evaporator for heat exchange. The outlet of the second heat exchange unit is connected to the spray unit; The water return unit is located below the spray unit and is connected to the water storage tank to return the circulating water after spraying to the water storage tank.

2. The refrigeration waste heat circulating water thawing device according to claim 1, characterized in that, The water storage tank is equipped with a high liquid level sensor, a low liquid level sensor, a water supply valve, and a drain valve. The water supply valve is connected to an external water supply pipeline, and the drain valve is connected to a drain pipeline.

3. The refrigeration waste heat circulating water thawing device according to claim 2, characterized in that, It also includes a control unit, wherein the high liquid level sensor, the low liquid level sensor, the water supply valve, the drain valve, and the water supply pump are electrically connected to the control unit respectively; The control unit is used to control the water supply valve to open when the low liquid level sensor detects that the water level in the storage tank is lower than the low liquid level, and to control the water supply valve to close and the drain valve to open when the high liquid level sensor detects that the water level in the storage tank has reached the high liquid level.

4. A refrigeration waste heat circulating water thawing device according to claim 1 or 2, characterized in that, A filter is provided between the water supply pump and the first heat exchange unit. The inlet of the filter is connected to the outlet of the water supply pump, and the outlet of the filter is connected to the inlet of the first heat exchange unit.

5. The refrigeration waste heat circulating water thawing device according to claim 1, characterized in that, The first heat exchange unit includes a first heat exchange coil, which is arranged adjacent to, fitted to, sleeved on, or wrapped around the exhaust pipe of the compressor. The circulating water channel in the first heat exchange coil is isolated from the refrigerant channel in the exhaust pipe of the compressor.

6. The refrigeration waste heat circulating water thawing device according to claim 1, characterized in that, The second heat exchange unit includes a second heat exchange coil, which is arranged adjacent to, fitted to, sleeved on, or wrapped around the suction side low-temperature pipeline of the evaporator. The circulating water channel in the second heat exchange coil is isolated from the refrigerant channel in the suction side low-temperature pipeline.

7. The refrigeration waste heat circulating water thawing device according to claim 5, characterized in that, It also includes a sterilization unit located downstream of the first heat exchange unit, the sterilization unit including an ultraviolet sterilizer; A first temperature sensor is installed at the exhaust pipe of the compressor; The device also includes a control unit, which is electrically connected to the first temperature sensor and the ultraviolet sterilizer, and is configured to activate the ultraviolet sterilizer when the compressor exhaust temperature detected by the first temperature sensor is lower than a preset sterilization temperature threshold.

8. The refrigeration waste heat circulating water thawing device according to claim 7, characterized in that, The sterilization unit is located between the first heat exchange unit and the second heat exchange unit, and the preset sterilization temperature threshold is 95°C.

9. A refrigeration waste heat circulating water thawing device according to claim 7 or 8, characterized in that, An air-cooled heat exchanger is provided between the sterilization unit and the second heat exchange unit. The inlet of the air-cooled heat exchanger is connected to the outlet of the sterilization unit, and the outlet of the air-cooled heat exchanger is connected to the inlet of the second heat exchange unit.

10. A refrigeration waste heat circulating water thawing device according to claim 6, characterized in that, The second heat exchange coil is located at the suction side gas collecting pipe of the evaporator, and an insulation layer is provided on the outside of the second heat exchange coil.

11. A refrigeration waste heat circulating water thawing device according to claim 7, characterized in that, A water quality sensor is provided between the sterilization unit and the second heat exchange unit, and the water quality sensor is electrically connected to the control unit. The control unit is further configured to: activate the ultraviolet sterilizer when the water quality parameters detected by the water quality sensor do not meet the preset water quality safety conditions; and if the water quality parameters continue to fail to meet the preset water quality safety conditions for a preset duration after the ultraviolet sterilizer is activated, control the water supply pump to stop running and / or control the drain valve to open.

12. The refrigeration waste heat circulating water thawing device according to claim 7, characterized in that, The spray unit includes a spray table and a spray head disposed above the spray table, and the outlet of the second heat exchange unit is connected to the spray head. A second temperature sensor is provided on the water inlet side of the spray head. The control unit is electrically connected to the second temperature sensor and the water supply pump, and is configured to adjust the operating parameters of the water supply pump according to the deviation between the water temperature detected by the second temperature sensor and the target spray water temperature range.

13. The refrigeration waste heat circulating water thawing device according to claim 12, characterized in that, The spray table is equipped with a weight sensor, and a visual recognition camera is installed above the spray table. The weight sensor and the visual recognition camera are electrically connected to the control unit. The control unit is used to determine the defrosting time and the target spray water temperature range based on the food type information obtained by the visual recognition camera and the food weight information obtained by the weight sensor.

14. A method for defrosting by circulating waste heat from refrigeration with water, characterized in that, The method applied to the refrigeration waste heat circulating water thawing device according to any one of claims 1-13 includes: The defrosting water or condensate produced by the evaporator is collected by a drip tray located below the evaporator and then directed to a water storage tank. Obtain the type and weight of the food to be thawed, and determine the target spray water temperature range and preset thawing time based on the type and weight of the food to be thawed; The circulating water in the water storage tank is transported to the first heat exchange unit, so that the circulating water is isolated from the compressor's exhaust pipe for heat exchange; Based on the exhaust temperature of the compressor and / or the water quality parameters of the circulating water, the circulating water after heat exchange in the first heat exchange unit is sterilized. The sterilized circulating water is transported to the second heat exchange unit, so that the circulating water is isolated from the low-temperature pipeline on the suction side of the evaporator for heat exchange, and the water temperature of the circulating water enters the target spray water temperature range. Circulating water that has entered the target spray water temperature range is sprayed onto the food to be thawed through the spray unit, and the operating parameters of the water supply pump are adjusted according to the deviation between the real-time detected spray water temperature and the target spray water temperature range during the spraying process. Collect the circulating water after spraying and return it to the water storage tank.

15. A cold storage facility, comprising a cold storage body, characterized in that, It also includes a refrigeration waste heat circulating water thawing device as described in any one of claims 1-13, which is installed inside the cold storage body.

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