Warehouse operation control system and refrigeration unit

Abstract

The present application relates to a warehouse operation control system and a refrigeration unit. An auxiliary heat exchange device is provided between the evaporation device at the end of the warehouse and the external refrigeration device. The auxiliary heat exchange device connects the return air outlet and the fresh air inlet of the warehouse, so that the air flowing out of the return air outlet can flow back into the warehouse through the auxiliary heat exchange device and then through the fresh air inlet. At the same time, after the auxiliary heat exchange device is turned on under the control of the controller, the refrigerant flowing out of the evaporation device at the end of the warehouse can further flow through the auxiliary heat exchange device before flowing back to the external refrigeration device. During this process, the refrigerant absorbs heat and is evaporated, while the air releases heat, causing the water vapor carried in the air to be frost-condensed on the auxiliary heat exchange device, thereby realizing the dehumidification operation. The dehumidified air then flows into the interior of the warehouse through the air supply outlet, preventing frost formation at the evaporation device at the end of the warehouse due to high air humidity, and thus effectively improving the refrigeration reliability of the warehouse.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration, and particularly to a warehouse operation control system and a refrigeration unit. Background Art

[0002] A cold storage refers to a facility that uses various equipment for refrigeration and can be artificially controlled to maintain a stable low temperature. Through artificial refrigeration, it can keep a certain low temperature indoors, which is conducive to the freezing and refrigeration of various foods, medicines, and machinery, bringing great convenience to people's daily lives. During the refrigeration operation of the warehouse, due to poor sealing of the warehouse and frequent entry and exit, humid air leaks in, or the newly stored items have a relatively high humidity, causing moisture to enter the air, etc., which will increase the air humidity in the warehouse. At this time, the terminal heat exchanger in the warehouse often operates at a temperature lower than the current dew point temperature of the indoor air, which is extremely likely to cause the humid air around the low-temperature cooling surface of the terminal heat exchanger in the warehouse to change from an unsaturated state to a saturated state, and then reach a supersaturated state. Therefore, a part of the water vapor in the air will condense into water droplets on the cold surface (the outer surface of the evaporator coil and its fins). As the evaporator continues to operate, the condensed water droplets will turn into a frost layer and adhere to the outer surface of the evaporator.

[0003] After the evaporator surface is frosted, the thermal conductivity of the frost is several orders of magnitude smaller than that of the evaporator metal material. The deposition of frost on the evaporator surface will increase the thermal resistance and reduce the heat exchange effect. After the evaporator surface is frosted, the cross-sectional area of the internal air flow channel decreases, and the resistance increases, resulting in a decrease in the flow rate and a loss of heat exchange capacity. In severe cases, it will cause the temperature in the warehouse to rise, or the low-pressure protection of the refrigeration host to shut down. Therefore, the traditional warehouse has the disadvantage of poor refrigeration reliability. Summary of the Invention

[0004] Based on this, it is necessary to provide a warehouse operation control system and a refrigeration unit to solve the problem of poor refrigeration reliability of the traditional warehouse.

[0005] A warehouse operation control system includes a warehouse end evaporation device, a controller, and an auxiliary heat exchange device. The warehouse end evaporation device is arranged inside the warehouse. The warehouse end evaporation device and the auxiliary heat exchange device are respectively connected to the controller. The liquid inlet end of the warehouse end evaporation device is used to connect to the liquid outlet end of an external refrigeration device. The liquid outlet end of the warehouse end evaporation device is connected to the liquid inlet end of the auxiliary heat exchange device and the liquid inlet end of the external refrigeration device. The liquid outlet end of the auxiliary heat exchange device is connected to the liquid inlet end of the external refrigeration device. The air inlet end of the auxiliary heat exchange device is connected to the return air outlet of the warehouse. The air outlet end of the auxiliary heat exchange device is connected to the air inlet of the warehouse. The controller is used to control the opening and operation of the auxiliary heat exchange device when the dehumidification condition is met during the refrigeration operation of the warehouse, so that the refrigerant flows out from the liquid outlet end of the warehouse end evaporation device, flows back to the external refrigeration device after passing through the auxiliary heat exchange device, and at the same time, the air inside the warehouse flows out of the warehouse from the return air outlet, is dehumidified by the auxiliary heat exchange device, and then flows into the warehouse from the air inlet.

[0006] In one embodiment, the warehouse operation control system further includes a humidity detector. The humidity detector is arranged inside the warehouse and is connected to the controller.

[0007] In one embodiment, the warehouse end evaporation device includes an end evaporator, a first throttle valve, and a first solenoid valve. The end evaporator, the first throttle valve, and the first solenoid valve are respectively connected to the controller. The input end of the end evaporator is connected to one end of the first throttle valve. The other end of the first throttle valve is connected to one end of the first solenoid valve. The other end of the first solenoid valve serves as the liquid inlet end of the warehouse end evaporation device and is connected to the liquid outlet end of the external refrigeration device. The output end of the end evaporator serves as the liquid outlet end of the warehouse end evaporation device and is connected to the liquid inlet end of the auxiliary heat exchange device and the liquid inlet end of the external refrigeration device.

[0008] In one embodiment, the end evaporator is a cooling fan.

[0009] In one embodiment, the warehouse operation control system further includes a second solenoid valve. The auxiliary heat exchange device includes a third solenoid valve, a second throttle valve, a heat exchanger, and a fan. The second solenoid valve, the third solenoid valve, the second throttle valve, the heat exchanger, and the fan are respectively connected to the controller. The liquid outlet end of the warehouse end evaporation device is connected to one end of the second solenoid valve, and the other end of the second solenoid valve is connected to the liquid inlet end of the external refrigeration device. The first input end of the heat exchanger is connected to one end of the second throttle valve, and the other end of the second throttle valve is connected to one end of the third solenoid valve. The other end of the third solenoid valve is used as the liquid inlet end of the auxiliary heat exchange device and is connected to one end of the second solenoid valve. The first output end of the heat exchanger is used as the liquid outlet end of the auxiliary heat exchange device and is connected to the other end of the second solenoid valve. The second input end of the heat exchanger is used as the air inlet end of the auxiliary heat exchange device and is connected to the return air outlet of the warehouse. The second output end of the heat exchanger is connected to one end of the fan, and the other end of the fan is used as the air outlet end of the auxiliary heat exchange device and is connected to the air inlet of the warehouse.

[0010] In one embodiment, the warehouse operation control system further includes a two-way valve. The auxiliary heat exchange device includes a third throttle valve, a heat exchanger, and a fan. The two-way valve, the third throttle valve, the heat exchanger, and the fan are respectively connected to the controller. The first input end of the heat exchanger is connected to one end of the third throttle valve, and the other end of the third throttle valve is used as the liquid inlet end of the auxiliary heat exchange device and is connected to the first outlet end of the two-way valve. The inlet end of the two-way valve is connected to the liquid outlet end of the warehouse end evaporation device, and the second outlet end of the two-way valve is connected to the liquid inlet end of the external refrigeration device. The first output end of the heat exchanger is used as the liquid outlet end of the auxiliary heat exchange device and is connected to the liquid inlet end of the external refrigeration device. The second input end of the heat exchanger is used as the air inlet end of the auxiliary heat exchange device and is connected to the return air outlet of the warehouse. The second output end of the heat exchanger is connected to one end of the fan, and the other end of the fan is used as the air outlet end of the auxiliary heat exchange device and is connected to the air inlet of the warehouse.

[0011] In one embodiment, air valves are provided at the air inlet and the return air outlet, and the air inlet end and the air outlet end of the auxiliary heat exchange device are respectively communicated with the interior of the warehouse through the air valves.

[0012] In one embodiment, the warehouse operation control system further includes a touch display device, and the touch display device is connected to the controller.

[0013] A refrigeration unit includes a refrigeration device and the above-mentioned warehouse operation control system.

[0014] In one embodiment, the refrigeration device includes a suction filter, a vapor separator, a compressor, an oil separator, a condenser, a liquid receiver, a drying filter, and a fourth solenoid valve. The suction filter, the vapor separator, the compressor, the oil separator, the condenser, the liquid receiver, the drying filter, and the fourth solenoid valve are respectively connected to the controller. The input end of the suction filter serves as the liquid inlet end of the refrigeration device and is connected to the liquid outlet end of the evaporator at the end of the storage room and the liquid outlet end of the auxiliary heat exchange device. The input end of the suction filter is connected to the input end of the vapor separator. The output end of the vapor separator is connected to the input end of the compressor. The output end of the compressor is connected to the input end of the oil separator. The output end of the oil separator is connected to the input end of the condenser. The output end of the condenser is connected to the input end of the liquid receiver. The output end of the liquid receiver is connected to the input end of the drying filter. The output end of the drying filter is connected to one end of the fourth solenoid valve. The other end of the fourth solenoid valve serves as the liquid outlet end of the refrigeration device and is connected to the liquid inlet end of the evaporator at the end of the storage room.

[0015] In the above-mentioned storage room operation control system and refrigeration unit, an auxiliary heat exchange device is provided between the evaporator at the end of the storage room and the external refrigeration device. The auxiliary heat exchange device connects the return air outlet and the fresh air inlet of the storage room, so that the air flowing out of the return air outlet can flow back into the storage room through the auxiliary heat exchange device and then through the fresh air inlet. At the same time, after the auxiliary heat exchange device is turned on under the control of the controller, the refrigerant flowing out of the evaporator at the end of the storage room can further flow through the auxiliary heat exchange device before flowing back to the external refrigeration device. When the air in the storage room enters from the return air outlet and flows through the auxiliary heat exchange device, the refrigerant absorbs heat and evaporates, while the air releases heat, causing the water vapor carried in the air to be frosted and condensed on the auxiliary heat exchange device, thereby realizing the dehumidification operation. The dehumidified air then flows into the storage room through the supply air outlet, avoiding frosting at the evaporator at the end of the storage room due to high air humidity, and thus effectively improving the refrigeration reliability of the storage room. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic structural diagram of the storage room operation control system in one embodiment;

[0018] Figure 2 Schematic structural diagram of the storage room operation control system in another embodiment;

[0019] Figure 3 Schematic structural diagram of a warehouse operation control system in another embodiment;

[0020] Figure 4 Schematic structural diagram of a refrigeration unit in an embodiment. Specific embodiments

[0021] To facilitate the understanding of this application, the following will provide a more comprehensive description of this application with reference to the relevant drawings. The drawings show the preferred embodiments of this application. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure content of this application more thorough and comprehensive.

[0022] Please refer to Figure 1 , a warehouse operation control system, including a warehouse end evaporation device 10, a controller 30, and an auxiliary heat exchange device 20. The warehouse end evaporation device 10 is arranged inside the warehouse. The warehouse end evaporation device 10 and the auxiliary heat exchange device 20 are respectively connected to the controller 30. The liquid inlet end of the warehouse end evaporation device 10 is used to connect to the liquid outlet end of an external refrigeration device 40. The liquid outlet end of the warehouse end evaporation device 10 is connected to the liquid inlet end of the auxiliary heat exchange device 20 and the liquid inlet end of the external refrigeration device 40. The liquid outlet end of the auxiliary heat exchange device 20 is connected to the liquid inlet end of the external refrigeration device 40. The air inlet end of the auxiliary heat exchange device 20 is connected to the return air outlet 70 of the warehouse, and the air outlet end of the auxiliary heat exchange device 20 is connected to the air inlet 60 of the warehouse. The controller 30 is used to control the opening and operation of the auxiliary heat exchange device 20 when the dehumidification condition is met during the refrigeration operation of the warehouse, so that the refrigerant flows out from the liquid outlet end of the warehouse end evaporation device 10, flows back to the external refrigeration device 40 after passing through the auxiliary heat exchange device 20, and at the same time, the air inside the warehouse flows out of the warehouse from the return air outlet 70, and after being dehumidified by the auxiliary heat exchange device 20, flows into the warehouse from the air inlet 60.

[0023] Specifically, the liquid inlet end is the port where the refrigerant flows in, the liquid outlet end is the port where the refrigerant flows out, the air inlet end is the port where the air flows in, and the air outlet end is also the port where the air flows out. In the normal refrigeration process, the controller 30 controls the auxiliary heat exchange device 20 to be in the closed state. Correspondingly, there will be no air flow between the return air outlet and the air inlet of the warehouse at this time, and the entire warehouse is in a closed state. The temperature reduction operation inside the warehouse is achieved through the warehouse end evaporation device 10. Correspondingly, at this time, the liquid outlet end of the external refrigeration device 40 conveys the refrigerant to the liquid inlet end of the warehouse end evaporation device 10. The warehouse end evaporation device 10 uses the refrigerant to achieve the refrigeration operation. After the refrigeration is completed, the refrigerant flows out from the liquid outlet end of the warehouse end evaporation device 10. Since the auxiliary heat exchange device 20 is in the closed state, it will not flow through the auxiliary heat exchange device 20 at this time, but directly flows into the liquid inlet end of the external refrigeration device 40 to achieve a refrigeration cycle.

[0024] In the case where it is necessary to dehumidify the air in the storage room, the controller 30 will control the auxiliary heat exchanger to turn on, so that the air supply management between the return air outlet and the air inlet of the storage room is in a conducting state. At the same time, the pipeline between the auxiliary heat exchange device 20 and the evaporation device 10 at the end of the storage room is conducted, and the pipeline between the evaporation device 10 at the end of the storage room and the external refrigeration device 40 is closed. At this time, the refrigerant flowing out of the external refrigeration device 40 flows into the liquid inlet end of the evaporation device 10 at the end of the storage room, flows out from the liquid outlet end of the evaporation device 10 at the end of the storage room, and then flows into the liquid inlet end of the auxiliary heat exchange device 20, and finally flows into the liquid inlet end of the external refrigeration device 40 through the liquid outlet end of the auxiliary heat exchange device 20, realizing the refrigeration cycle. When the air in the storage room enters from the return air outlet and flows through the auxiliary heat exchange device 20, the refrigerant absorbs heat and evaporates, while the air releases heat, causing the water vapor carried in the air to be frosted and condensed on the auxiliary heat exchange device 20, thereby realizing the dehumidification operation. The dehumidified air then flows into the storage room through the air supply outlet, thereby pre-treating the air dehumidification of the evaporation device 10 at the end of the storage room and avoiding frosting at the evaporation device 10 at the end of the storage room due to high air humidity. Through the solution of this embodiment, the dehumidification operation can be realized while refrigerating the storage room, and it will not affect the normal refrigeration, and has strong working convenience.

[0025] After the dehumidification operation is completed, under the control of the controller 30, the auxiliary heat exchange device 20 is closed, and the pipeline between the liquid outlet end of the evaporation device 10 at the end of the storage room and the liquid inlet end of the external refrigeration device 40 is opened, so that the refrigerant flowing out of the evaporation device at the end directly returns to the external refrigeration device 40. And the frost layer condensed on the auxiliary heat exchange device 20 is defrosted, so that it can be carried out in time when it is needed again later.

[0026] It should be noted that the way for the controller 30 to judge whether the dehumidification condition is met is not the only one. In one embodiment, it may be that the controller 30 analyzes whether it receives a dehumidification operation instruction sent by the user to decide whether to turn on the auxiliary heat exchange device 20 for dehumidification treatment. In other embodiments, it may also be to detect the air humidity inside the storage room, and turn on the auxiliary heat exchange device 20 to dehumidify the storage room when the air humidity reaches a certain level.

[0027] Taking the detection of the air humidity in the storage room as an example, please refer to Figure 2, in one embodiment, the warehouse operation control system further includes a humidity detector 50. The humidity detector 50 is disposed inside the warehouse and is connected to the controller 30. In this embodiment, by detecting the air humidity in the warehouse in real time and conducting comparative analysis, when the air humidity in the warehouse is greater than or equal to the preset humidity value, the controller 30 will control the auxiliary heat exchange device 20 to start for dehumidification treatment. Correspondingly, when the air humidity is less than the preset humidity value, the dehumidification operation can be ended by controlling the auxiliary heat exchange device 20 to stop running. It can be understood that the type of the humidity detector 50 is not unique. In one embodiment, it can be realized by a humidity sensor.

[0028] For the dehumidification operation according to the received dehumidification instruction sent by the user, please refer to Figure 2 , in one embodiment, the warehouse operation control system further includes a touch display device, and the touch display device is connected to the controller 30. In this example, whether to dehumidify the warehouse is controlled by the user himself. There are corresponding virtual buttons set on the touch display device. When the user opens the warehouse door or puts objects with a large amount of moisture into the warehouse, etc., the user can press the corresponding virtual button according to his own needs to send a dehumidification instruction. Then, after receiving the dehumidification instruction, the controller 30 controls the auxiliary heat exchange device 20 to start for dehumidification operation.

[0029] Further, in one embodiment, the warehouse operation control system includes both a touch display device and a humidity detector 50 at the same time. The air humidity in the warehouse can be displayed in real time through the touch display device. At this time, the controller 30 can perform dehumidification treatment in a manner of automatic control according to the humidity data and / or manual control according to the dehumidification instruction.

[0030] Please refer to Figure 3 , in one embodiment, the warehouse end evaporation device 10 includes an end evaporator 11, a first throttle valve 12, and a first solenoid valve 13. The end evaporator 11, the first throttle valve 12, and the first solenoid valve 13 are respectively connected to the controller 30 (not shown in the figure). The input end of the end evaporator 11 is connected to one end of the first throttle valve 12. The other end of the first throttle valve 12 is connected to one end of the first solenoid valve 13. The other end of the first solenoid valve 13 serves as the liquid inlet end of the warehouse end evaporation device 10 and is connected to the liquid outlet end of the external refrigeration device 40. The output end of the end evaporator 11 serves as the liquid outlet end of the warehouse end evaporation device 10 and is connected to the liquid inlet end of the auxiliary heat exchange device 20 and the liquid inlet end of the external refrigeration device 40.

[0031] Specifically, a throttle valve is a valve that controls the fluid flow rate by changing the throttle cross-section or throttle length. In addition to the end evaporator 11 for realizing the refrigeration operation in the storage room in this embodiment, a first solenoid valve 13 and a first throttle valve 12 are further provided between the liquid inlet end of the end evaporator 11 and the liquid outlet end of the external refrigeration device 40. The first solenoid valve 13 can be used to control whether the refrigerant flowing out of the external refrigeration device 40 flows into the end evaporator 11, and the first throttle valve 12 changes the throttle cross-section or throttle length to control the fluid flow rate, so as to form a certain pressure difference before and after the throttle valve. Through the solution of this embodiment, it can be ensured that the external refrigeration device 40 effectively transports the refrigerant to the end evaporator 11 to realize the temperature reduction operation inside the storage room.

[0032] It should be noted that the type of the throttle valve is not unique. In one embodiment, a thermostatic expansion valve can be used. Since the thermostatic expansion valve comes with a temperature sensing bulb, the temperature sensing bulb can be arranged at the refrigerant outlet (i.e., the liquid outlet end of the end evaporator 11) to feedback the temperature, and the thermostatic expansion valve body is arranged at the liquid inlet end of the end evaporator 11, so as to adjust the throttling capacity through the feedback temperature. Similarly, the type of the end evaporator 11 is not unique. In one embodiment, the end evaporator 11 is a cooling fan.

[0033] Please refer to Figure 3 , in one embodiment, the storage room operation control system further includes a second solenoid valve 80. The auxiliary heat exchange device 20 includes a third solenoid valve 21, a second throttle valve 22, a heat exchanger 23 and a fan 24. The second solenoid valve 80, the third solenoid valve 21, the second throttle valve 22, the heat exchanger 23 and the fan 24 are respectively connected to a controller 30 (not shown in the figure). The liquid outlet end of the storage room end evaporation device 10 is connected to one end of the second solenoid valve 80, and the other end of the second solenoid valve 80 is connected to the liquid inlet end of the external refrigeration device 40. The first input end of the heat exchanger 23 is connected to one end of the second throttle valve 22, the other end of the second throttle valve 22 is connected to one end of the third solenoid valve 21, and the other end of the third solenoid valve 21 is used as the liquid inlet end of the auxiliary heat exchange device 20 and is connected to one end of the second solenoid valve 80. The first output end of the heat exchanger 23 is used as the liquid outlet end of the auxiliary heat exchange device 20 and is connected to the other end of the second solenoid valve 80. The second input end of the heat exchanger 23 is used as the air inlet end of the auxiliary heat exchange device 20 and is connected to the return air outlet of the storage room. The second output end of the heat exchanger 23 is connected to one end of the fan 24, and the other end of the fan 24 is used as the air outlet end of the auxiliary heat exchange device 20 and is connected to the air inlet of the storage room.

[0034] Specifically, in this embodiment, the second solenoid valve 80 is used to control the refrigerant transmission between the evaporating device 10 at the end of the storage and the external refrigeration device 40. When the second solenoid valve 80 is opened, the refrigerant flowing out of the evaporating device 10 at the end of the storage can directly flow back to the external refrigeration device 40 through the second solenoid valve 80, be cooled under the action of the external refrigeration device 40, and then circulate back to the evaporating device 10 at the end of the storage for refrigeration. At the same time, the third solenoid valve 21 is used to control the circulation of the refrigerant between the evaporating device 10 at the end of the storage and the auxiliary heat exchange device 20. When the third solenoid valve 21 is opened and the second solenoid valve 80 is closed, the refrigerant flowing out of the evaporating device at the end of the storage will flow through the auxiliary heat exchange device 20 before flowing into the external refrigeration device 40 for cooling, preparing for the next refrigeration cycle.

[0035] A second throttle valve 22 is also provided between the third solenoid valve 21 and the auxiliary heat exchange device 20. At this time, the end evaporation temperature at the front end of the second throttle valve 22 is T1. Under the action of the secondary throttling and pressure reduction of the second throttle valve 22 (relative to the first throttling and pressure reduction of the first throttle valve 12 in the above embodiment), the evaporation temperature T2 of the auxiliary heat exchange device 20 drops below T1. Thus, when part of the air in the storage enters the auxiliary heat exchange device 20 from the return air outlet, the refrigerant absorbs heat and evaporates, while the air releases heat, causing the water vapor carried in the air to be frost-condensed on the auxiliary heat exchanger 23, thereby achieving dehumidification. The dehumidified air then passes through the fan 24 and is discharged from the supply air outlet and enters the end evaporator 11.

[0036] Furthermore, to ensure that the air inside the storage can flow out from the return air outlet, be dehumidified by the auxiliary heat exchange device 20, and then flow back to the storage, a fan 24 is also provided in this embodiment between the air outlet end of the auxiliary heat exchange device 20 and the air inlet of the storage. During the dehumidification operation, when the controller 30 opens the air inlet, the return air outlet, the third solenoid valve 21, the second throttle valve 22, and closes the second solenoid valve 80, the fan 24 also needs to be turned on.

[0037] When the controller 30 detects that the dehumidification end condition is met, that is, when it receives the dehumidification end signal sent by the user or detects that the air humidity in the storage is less than the preset value, the controller 30 will control the auxiliary heat exchange device 20 to close to end the dehumidification operation. Specifically, first, the third solenoid valve 21 and the second throttle valve 22 are closed, and the second solenoid valve 80 is opened. The refrigerant normally flows into the external refrigeration device 40. However, at this time, the fan 24 is not immediately turned off, but is maintained for a period of time, and then the fan 24 is turned off. At the same time, the return air outlet and the air inlet are closed to melt the frost layer condensed on the auxiliary heat exchange device 20 during dehumidification, preparing for the next dehumidification operation.

[0038] In one embodiment, the warehouse operation control system further includes a two-way valve. The auxiliary heat exchange device 20 includes a third throttle valve, a heat exchanger, and a blower. The two-way valve, the third throttle valve, the heat exchanger, and the blower are respectively connected to the controller 30. The first input end of the heat exchanger is connected to one end of the third throttle valve. The other end of the third throttle valve serves as the liquid inlet end of the auxiliary heat exchange device 20 and is connected to the first outlet end of the two-way valve. The inlet end of the two-way valve is connected to the liquid outlet end of the evaporation device 10 at the end of the warehouse. The second outlet end of the two-way valve is connected to the liquid inlet end of the external refrigeration device 40. The first output end of the heat exchanger serves as the liquid outlet end of the auxiliary heat exchange device 20 and is connected to the liquid inlet end of the external refrigeration device 40. The second input end of the heat exchanger serves as the air inlet end of the auxiliary heat exchange device 20 and is connected to the return air outlet of the warehouse. The second output end of the heat exchanger is connected to one end of the blower. The other end of the blower serves as the air outlet end of the auxiliary heat exchange device 20 and is connected to the air inlet of the warehouse.

[0039] Specifically, similar to the working principle of the above embodiment, this embodiment uses a two-way valve to replace the second solenoid valve 80 and the third solenoid valve 21. When dehumidification is required, only the passage between the inlet end and the first outlet end of the two-way valve needs to be opened, and the passage between the inlet end and the second outlet end of the two-way valve needs to be closed, so that the refrigerant can flow back to the external refrigeration device 40 after passing through the auxiliary heat exchange device 20. After the dehumidification is completed, the passage between the inlet end and the first outlet end of the two-way valve needs to be closed, and the passage between the inlet end and the second outlet end of the two-way valve needs to be opened. The rest of the operations are similar to the way of separate control of the two solenoid valves in the above embodiment and will not be elaborated here.

[0040] In one embodiment, air valves are provided at the air inlet and the return air outlet. The air inlet end and the air outlet end of the auxiliary heat exchange device 20 are respectively connected to the interior of the warehouse through air valves.

[0041] Specifically, in this embodiment, air valves are respectively provided at the air inlet and the return air outlet of the warehouse to realize the opening and closing control of the air inlet and the return air outlet. When dehumidification is required, while the controller 30 controls the auxiliary heat exchange device 20 to start running, the air valves at the air inlet and the return air outlet are also opened to enable air to flow from the return air outlet to the air inlet. When the dehumidification shutdown condition is met, only the air valves at the air inlet and the return air outlet need to be delayed in closing, and at the same time, the blower 24 needs to be delayed in closing, so that the defrosting treatment of the frost layer can be realized. Through the technical solution of this embodiment, it can be ensured that during the normal refrigeration process of the warehouse, the air in the warehouse will not flow out from the return air outlet, avoiding the influence of the external environment on the temperature in the warehouse and further ensuring the refrigeration reliability of the warehouse operation control system.

[0042] Since the auxiliary heat exchange device 20 can be turned on during the normal refrigeration process of the storage room and uses the refrigerant after complete evaporation, the impact on normal refrigeration is very small. At this time, sacrificing a part of the heat exchange area that does not exchange heat with the air in the warehouse can prevent the evaporation device 10 at the end of the warehouse from frosting and affecting heat exchange. At the same time, due to the secondary throttling of the second throttle valve 22, the evaporation temperature T2 of the auxiliary heat exchange device 20 is lower than the evaporation temperature T1 at the end of the warehouse, and the moisture in the air in the warehouse can be quickly condensed into frost by means of low-temperature cooling more efficiently, realizing the dehumidification operation.

[0043] In the above-mentioned warehouse operation control system, an auxiliary heat exchange device 20 is arranged between the evaporation device 10 at the end of the warehouse and the external refrigeration device 40. The auxiliary heat exchange device 20 connects the return air outlet and the air inlet of the warehouse, so that the air flowing out of the return air outlet can flow back into the warehouse through the auxiliary heat exchange device 20 and then through the air inlet. At the same time, after the auxiliary heat exchange device 20 is turned on under the control of the controller 30, the refrigerant flowing out of the evaporation device 10 at the end of the warehouse can further flow through the auxiliary heat exchange device 20 before flowing back to the external refrigeration device 40. When the air in the warehouse enters from the return air outlet and flows through the auxiliary heat exchange device 20, the refrigerant absorbs heat and is evaporated, while the air releases heat, so that the water vapor carried in the air is frosted and condensed on the auxiliary heat exchange device 20, thereby realizing the dehumidification operation. The dehumidified air then flows into the warehouse through the air supply outlet, preventing frosting from occurring at the evaporation device 10 at the end of the warehouse due to high air humidity, and effectively improving the refrigeration reliability of the warehouse.

[0044] Please refer to Figure 4 , a refrigeration unit, including a refrigeration device 40 and the above-mentioned warehouse operation control system.

[0045] Specifically, as shown in the above-mentioned various embodiments of the warehouse operation control system, in the normal refrigeration process, the controller 30 controls the auxiliary heat exchange device 20 to be in the closed state. Correspondingly, there is no air flow between the return air outlet and the air inlet of the warehouse at this time, and the entire warehouse is in a closed state. The temperature inside the warehouse is reduced through the evaporation device 10 at the end of the warehouse. Correspondingly, at this time, the liquid outlet end of the external refrigeration device 40 delivers the refrigerant to the liquid inlet end of the evaporation device 10 at the end of the warehouse. The evaporation device 10 at the end of the warehouse uses the refrigerant to perform the refrigeration operation. After the refrigeration is completed, the refrigerant flows out from the liquid outlet end of the evaporation device 10 at the end of the warehouse. Since the auxiliary heat exchange device 20 is in the closed state, it will not flow through the auxiliary heat exchange device 20 at this time, but directly flows into the liquid inlet end of the external refrigeration device 40 to complete a refrigeration cycle.

[0046] In the case where it is necessary to dehumidify the air in the warehouse, the controller 30 will control the auxiliary heat exchanger 23 to turn on, so that the air supply management between the return air outlet and the air inlet of the warehouse is in a conducting state. At the same time, the pipeline between the auxiliary heat exchange device 20 and the evaporator device 10 at the end of the warehouse is conducted, and the pipeline between the evaporator device 10 at the end of the warehouse and the external refrigeration device 40 is closed. At this time, the refrigerant flowing out of the external refrigeration device 40 flows in through the liquid inlet end of the evaporator device 10 at the end of the warehouse, flows out from the liquid outlet end of the evaporator device 10 at the end of the warehouse, and then flows in through the liquid inlet end of the auxiliary heat exchange device 20, and finally flows into the liquid inlet end of the external refrigeration device 40 through the liquid outlet end of the auxiliary heat exchange device 20, realizing a refrigeration cycle. When the air in the warehouse enters from the return air outlet and flows through the auxiliary heat exchange device 20, the refrigerant absorbs heat and evaporates, while the air releases heat, causing the water vapor carried in the air to be frosted and condensed on the auxiliary heat exchange device 20, thereby realizing the dehumidification operation. The dehumidified air then flows into the warehouse interior through the air supply outlet, thereby performing air dehumidification pretreatment on the evaporator device 10 at the end of the warehouse, avoiding frosting at the evaporator device 10 at the end of the warehouse due to high air humidity. Through the solution of this embodiment, dehumidification operation can be realized while refrigerating the warehouse, and it will not affect the normal refrigeration, having strong working convenience.

[0047] After the dehumidification operation is completed, under the control of the controller 30, the auxiliary heat exchange device 20 is closed, and the pipeline between the liquid outlet end of the evaporator device 10 at the end of the warehouse and the liquid inlet end of the external refrigeration device 40 is opened, so that the refrigerant flowing out of the evaporator device at the end directly returns to the external refrigeration device 40. And defrost the frost layer formed on the auxiliary heat exchange device 20, so that it can be carried out in time when it is needed again later.

[0048] Further, please continue to refer to Figure 4, in one embodiment, the refrigeration device 40 includes a suction filter 41, a vapor separator 42, a compressor 42, an oil separator 44, a condenser 45, a liquid receiver 46, a dryer filter 47, and a fourth solenoid valve 48. The suction filter 41, the vapor separator 42, the compressor 42, the oil separator 44, the condenser 45, the liquid receiver 46, the dryer filter 47, and the fourth solenoid valve 48 are respectively connected to a controller 30 (not shown in the figure). The input end of the suction filter 41, as the liquid inlet end of the refrigeration device 40, is connected to the liquid outlet end of the evaporator device 10 at the end of the storage room and the liquid outlet end of the auxiliary heat exchange device 20. The input end of the suction filter 41 is connected to the input end of the vapor separator 42. The output end of the vapor separator 42 is connected to the input end of the compressor 42. The output end of the compressor 42 is connected to the input end of the oil separator 44. The output end of the oil separator 44 is connected to the input end of the condenser 45. The output end of the condenser 45 is connected to the input end of the liquid receiver 46. The output end of the liquid receiver 46 is connected to the input end of the dryer filter 47. The output end of the dryer filter 47 is connected to one end of the fourth solenoid valve 48. The other end of the fourth solenoid valve 48, as the liquid outlet end of the refrigeration device 40, is connected to the liquid inlet end of the evaporator device 10 at the end of the storage room.

[0049] Specifically, in normal refrigeration, the refrigerant flowing back from the evaporator device 10 at the end of the storage room or the refrigerant flowing back after passing through the auxiliary heat exchange device 20 first passes through the suction filter 41 to remove impurities in the medium and then enters the vapor separator 42 for gas-liquid separation. After that, it passes through the compressor 42 for pressurization processing and flows into the oil separator 44 to separate the lubricating oil in the high-pressure steam discharged by the compressor 42. Then it flows into the condenser 45 for condensation and cooling processing and is stored in the liquid receiver 46. When needed, it flows out of the liquid receiver 46, further passes through the dryer filter 47, and then flows back to the evaporator device 10 at the end of the storage room to achieve refrigeration.

[0050] It can be understood that, in one embodiment, the oil separator 44 is further connected to the compressor 42 to return the separated lubricating oil of the compressor 42 to the compressor 42 to ensure the normal operation of the compressor 42. In a feasible embodiment, after the refrigeration unit completes the dehumidification operation, it can also use the condensation heat of the refrigeration device 40 to defrost the auxiliary heat exchange device. At this time, due to the higher air temperature, the defrosting efficiency is higher.

[0051] In the above refrigeration unit, an auxiliary heat exchange device 20 is provided between the evaporation device 10 at the end of the storage room and the external refrigeration device 40. The auxiliary heat exchange device 20 connects the air return opening and the air inlet of the storage room, so that the air flowing out of the air return opening can flow back into the storage room through the auxiliary heat exchange device 20 and then through the air inlet. At the same time, after the auxiliary heat exchange device 20 is turned on under the control of the controller 30, the refrigerant flowing out of the evaporation device 10 at the end of the storage room can further flow through the auxiliary heat exchange device 20 before flowing back to the external refrigeration device 40. When the air in the storage room enters from the air return opening and flows through the auxiliary heat exchange device 20, the refrigerant absorbs heat and evaporates, while the air releases heat, causing the water vapor carried in the air to be frosted and condensed on the auxiliary heat exchange device 20, thereby realizing the dehumidification operation. The dehumidified air then flows into the storage room through the air supply opening, avoiding frosting at the evaporation device 10 at the end of the storage room due to high air humidity, and effectively improving the refrigeration reliability of the storage room.

[0052] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A warehouse operation control system, characterized in that, It includes an evaporator at the end of the storage room, a controller, a second solenoid valve, and an auxiliary heat exchange device. The evaporator at the end of the storage room is arranged inside the storage room. The evaporator at the end of the storage room and the auxiliary heat exchange device are respectively connected to the controller. The liquid inlet end of the evaporator at the end of the storage room is used to connect to the liquid outlet end of an external refrigeration device. The liquid outlet end of the evaporator at the end of the storage room is connected to the liquid inlet end of the auxiliary heat exchange device and the liquid inlet end of the external refrigeration device. The liquid outlet end of the auxiliary heat exchange device is connected to the liquid inlet end of the external refrigeration device. The air inlet end of the auxiliary heat exchange device is connected to the return air outlet of the storage room. The air outlet end of the auxiliary heat exchange device is connected to the air inlet of the storage room. The controller is used to control the opening and operation of the auxiliary heat exchange device when the storage room is in refrigeration operation and the dehumidification condition is met, so that the refrigerant flows out from the liquid outlet end of the evaporator at the end of the storage room, flows back to the external refrigeration device after passing through the auxiliary heat exchange device. At the same time, the air inside the storage room flows out of the storage room from the return air outlet, and after being subjected to frosting condensation dehumidification treatment by the auxiliary heat exchange device, it flows into the storage room from the air inlet. The auxiliary heat exchange device includes a third solenoid valve, a second throttle valve, a heat exchanger, and a fan. The second solenoid valve, the third solenoid valve, the second throttle valve, the heat exchanger, and the fan are respectively connected to the controller. The liquid outlet end of the evaporator at the end of the storage room is connected to one end of the second solenoid valve. The other end of the second solenoid valve is connected to the liquid inlet end of the external refrigeration device. The first input end of the heat exchanger is connected to one end of the second throttle valve. The other end of the second throttle valve is connected to one end of the third solenoid valve. The other end of the third solenoid valve is used as the liquid inlet end of the auxiliary heat exchange device and is connected to one end of the second solenoid valve. The first output end of the heat exchanger is used as the liquid outlet end of the auxiliary heat exchange device and is connected to the other end of the second solenoid valve. The second input end of the heat exchanger is used as the air inlet end of the auxiliary heat exchange device and is connected to the return air outlet of the storage room. The second output end of the heat exchanger is connected to one end of the fan. The other end of the fan is used as the air outlet end of the auxiliary heat exchange device and is connected to the air inlet of the storage room.

2. The warehouse operation control system according to claim 1, wherein It also includes a humidity detector. The humidity detector is arranged inside the storage room and is connected to the controller.

3. The warehouse operation control system according to claim 1, wherein, The evaporator at the end of the storage room includes an end evaporator, a first throttle valve, and a first solenoid valve. The end evaporator, the first throttle valve, and the first solenoid valve are respectively connected to the controller. The input end of the end evaporator is connected to one end of the first throttle valve. The other end of the first throttle valve is connected to one end of the first solenoid valve. The other end of the first solenoid valve is used as the liquid inlet end of the evaporator at the end of the storage room and is connected to the liquid outlet end of the external refrigeration device. The output end of the end evaporator is used as the liquid outlet end of the evaporator at the end of the storage room and is connected to the liquid inlet end of the auxiliary heat exchange device and the liquid inlet end of the external refrigeration device.

4. The warehouse operation control system according to claim 3, wherein The end evaporator is a cooling fan.

5. The warehouse operation control system according to claim 1, wherein It further includes a two-way valve. The auxiliary heat exchange device includes a third throttle valve, a heat exchanger and a blower. The two-way valve, the third throttle valve, the heat exchanger and the blower are respectively connected to the controller. The first input end of the heat exchanger is connected to one end of the third throttle valve. The other end of the third throttle valve serves as the liquid inlet end of the auxiliary heat exchange device and is connected to the first outlet end of the two-way valve. The inlet end of the two-way valve is connected to the liquid outlet end of the evaporator at the end of the storage room. The second outlet end of the two-way valve is connected to the liquid inlet end of the external refrigeration device. The first output end of the heat exchanger serves as the liquid outlet end of the auxiliary heat exchange device and is connected to the liquid inlet end of the external refrigeration device. The second input end of the heat exchanger serves as the air inlet end of the auxiliary heat exchange device and is connected to the return air outlet of the storage room. The second output end of the heat exchanger is connected to one end of the blower. The other end of the blower serves as the air outlet end of the auxiliary heat exchange device and is connected to the air inlet of the storage room.

6. The warehouse operation control system according to claim 1, characterized in that Air valves are provided at the air inlet and the return air outlet. The air inlet end and the air outlet end of the auxiliary heat exchange device are respectively communicated with the interior of the storage room through air valves.

7. The warehouse operation control system according to claim 1, characterized in that It further includes a touch display device, and the touch display device is connected to the controller.

8. A refrigeration unit, characterized in that, It includes a refrigeration device and the storage room operation control system according to any one of claims 1-7.

9. The refrigeration unit according to claim 8, characterized in that, The refrigeration device includes a suction filter, a vapor separator, a compressor, an oil separator, a condenser, a liquid receiver, a dryer filter and a fourth solenoid valve. The suction filter, the vapor separator, the compressor, the oil separator, the condenser, the liquid receiver, the dryer filter and the fourth solenoid valve are respectively connected to the controller. The input end of the suction filter serves as the liquid inlet end of the refrigeration device and is connected to the liquid outlet end of the evaporator at the end of the storage room and is connected to the liquid outlet end of the auxiliary heat exchange device. The input end of the suction filter is connected to the input end of the vapor separator. The output end of the vapor separator is connected to the input end of the compressor. The output end of the compressor is connected to the input end of the oil separator. The output end of the oil separator is connected to the input end of the condenser. The output end of the condenser is connected to the input end of the liquid receiver. The output end of the liquid receiver is connected to the input end of the dryer filter. The output end of the dryer filter is connected to one end of the fourth solenoid valve. The other end of the fourth solenoid valve serves as the liquid outlet end of the refrigeration device and is connected to the liquid inlet end of the evaporator at the end of the storage room.

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