Anti-freezing control system, method and equipment for terrace of low-temperature warehouse and storage medium

Abstract

The embodiment of the invention discloses a low-temperature warehouse floor anti-freezing control system, method and equipment and a storage medium. The low-temperature warehouse floor anti-freezing control system comprises a refrigerating circuit formed by a refrigerating terminal, a compressor and a condenser, and an anti-freezing circuit communicated with the refrigerating circuit. The anti-freezing loop is provided with a heat exchanger and an anti-freezing solution assembly, the first input end of the heat exchanger is connected with the condenser through a liquid falling pipeline, the second input end of the heat exchanger is connected with the anti-freezing solution assembly, and the output end of the heat exchanger is used for being connected with a heating piece of a floor in the low-temperature warehouse. And the controller is connected with the refrigerating loop and the anti-freezing loop. According to the anti-freezing control system, method and equipment for the terrace of the low-temperature warehouse and the storage medium, the problem that after heat of high-temperature gas exhausted by the compressor is cooled through the heat exchanger, liquid is easily contained in the gas in a loop is solved, and the terrace is heated through the anti-freezing solution subjected to heat exchange with the evaporative cooling liquid; and the situation that the heat exchange efficiency is reduced due to the fact that gas carries liquid is avoided.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of waste heat utilization, and in particular to a low-temperature warehouse floor antifreeze control system, method, equipment and storage medium. Background Art

[0002] A low-temperature warehouse is a warehouse that uses cooling facilities to create a suitable temperature and low-temperature environment. Due to the large temperature difference between the inside and outside of the low-temperature warehouse, the floor of the low-temperature warehouse should be laid with an insulation layer with a thickness suitable for the warehouse temperature. However, it cannot completely isolate the transfer of heat, but can only reduce the speed of heat transfer.

[0003] Among some technologies, there are currently three ways to prevent the floor of low-temperature warehouses from freezing, namely, overhead ventilation of the floor, use of liquid heating, and electric heating. Among them, floor heating is convenient to manage, safe and reliable, but it is easily restricted by the floor height and maintenance structure. Under the condition of limited low-temperature warehouse projects, electric heating consumes a lot of electricity. Therefore, considering factors such as heat recovery of the refrigeration system and low initial investment, liquid heating for floor heating is a priority measure.

[0004] However, in the liquid heating method, the oil pipe heating system design usually utilizes the heat of the high-temperature gas discharged from the compressor. After cooling by the heat exchanger, it is easy to cause the gas to carry liquid in the circuit, thereby reducing the heat exchange efficiency. Summary of the invention

[0005] The purpose of the present invention is to at least provide a low-temperature warehouse floor antifreeze control system, method, equipment and storage medium, which can at least solve the technical problem that in the liquid heating method, the oil pipe heating system design usually utilizes the heat of the high-temperature gas discharged by the compressor, which is easy to cause gas to carry liquid in the circuit after cooling by the heat exchanger, thereby reducing the heat exchange efficiency. At least it can achieve the technical effect that the antifreeze liquid after heat exchange with the evaporative cooling liquid can heat the floor, realize the efficient use of waste heat, and avoid the situation where the heat exchange efficiency is reduced due to gas carrying liquid.

[0006] In order to solve the above technical problems, at least one embodiment of the present application provides a low-temperature storage floor antifreeze control system, comprising: a refrigeration circuit formed by a refrigeration terminal, a compressor and a condenser connected in sequence along the circulation direction of the refrigerant, and an antifreeze circuit connected to the refrigeration circuit; the antifreeze circuit is provided with a heat exchanger and an antifreeze liquid component, the first input end of the heat exchanger is connected to the condenser through a liquid drop pipeline, the second input end of the heat exchanger is connected to the antifreeze liquid component, and the output end of the heat exchanger is used to connect to the heating element of the floor in the low-temperature storage;

[0007] A controller is connected to the refrigeration circuit and the antifreeze circuit, and is used to deliver the evaporative cooling liquid generated by the condenser into the heat exchanger through the liquid delivery pipeline, and to deliver antifreeze liquid to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger, and the antifreeze liquid after heat exchange is delivered to the heating element of the floor in the low-temperature storage.

[0008] At least one embodiment of the present application provides a low-temperature warehouse floor antifreeze control method, which is applied to the above-mentioned low-temperature warehouse floor antifreeze control system, and the method includes:

[0009] Detecting whether the floor temperature of the low-temperature storage is less than a first preset temperature threshold;

[0010] When it is detected that the floor temperature of the low-temperature storage is lower than the first preset temperature threshold, the liquid drop pipeline is controlled to be turned on, and the evaporative cold liquid generated by the condenser is sent to the heat exchanger through the liquid drop pipeline;

[0011] The antifreeze liquid is transported to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger;

[0012] The antifreeze liquid after heat exchange is transported to the heating element of the floor in the low temperature storage.

[0013] In some optional embodiments, after the antifreeze liquid after heat exchange is transported to the heating element of the floor in the low temperature storage, the method further includes:

[0014] Detecting whether the floor temperature of the low-temperature storage is greater than or equal to a second preset temperature threshold, wherein the second preset temperature threshold is greater than the first preset temperature threshold;

[0015] When it is detected that the floor temperature of the low-temperature storage is greater than or equal to the second preset temperature threshold, the return line is controlled to be closed so that the antifreeze liquid heated by the heating element remains in the heating element of the floor in the low-temperature storage.

[0016] At least one embodiment of the present application also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned low-temperature storage floor antifreeze control method.

[0017] At least one embodiment of the present application further provides a computer-readable storage medium storing a computer program, which implements the above-mentioned low-temperature warehouse floor antifreeze control method when executed by a processor.

[0018] The embodiments of the present application provide a low-temperature storage floor antifreeze control system, method, device and storage medium, which delivers the evaporative cooling liquid generated by the condenser into the heat exchanger through the liquid delivery pipeline, and delivers the antifreeze liquid to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger, and the antifreeze liquid after heat exchange is delivered to the heating element of the floor in the low-temperature storage. The evaporative cooling liquid generated by the condenser can directly enter the heat exchanger to exchange heat with the antifreeze liquid, so that the antifreeze liquid after heat exchange with the evaporative cooling liquid heats the floor, realizing efficient use of waste heat, and avoiding the situation where the heat exchange efficiency is reduced due to gas carrying liquid.

[0019] In some optional embodiments, the antifreeze circuit includes a heating pipeline and a return pipeline, the first end of the heating pipeline is connected to the output end of the heat exchanger, the second end of the heating pipeline and the first end of the return pipeline are both used to connect to the heating element of the floor in the low-temperature storage, the second end of the return pipeline is connected to the second input end of the heat exchanger, and the antifreeze liquid component is located in the return pipeline;

[0020] The controller is used to control the conduction state of the heating pipeline to transport the antifreeze liquid after heat exchange to the heating element of the floor in the low-temperature storage, and / or to control the conduction state of the return pipeline to transport the antifreeze liquid after heating the heating element of the floor in the low-temperature storage to the heat exchanger through the antifreeze liquid component.

[0021] By directly utilizing the waste heat of the evaporating cooling liquid to provide a heat source for floor heating, the need for an electric heating pipe heat source in the circulating oil pool in conventional liquid heating methods is eliminated. At the same time, the situation in which the heat exchange efficiency is low due to steam carrying liquid when using the compressor exhaust gas for heat exchange is avoided.

[0022] In some optional embodiments, the antifreeze liquid assembly includes: an antifreeze liquid pump, a first control valve, and an antifreeze liquid tank which are sequentially connected along the reflux direction of the reflux pipeline; the first end of the antifreeze liquid pump is used to connect to the heating element of the floor in the low-temperature storage, the second end of the antifreeze liquid pump is connected to the first end of the antifreeze liquid tank through the first control valve, and the second end of the antifreeze liquid tank is connected to the second input end of the heat exchanger;

[0023] The controller is used to control the conduction state of the first control valve to control the antifreeze liquid after heating the heating element of the floor in the low-temperature storage to flow back to the antifreeze liquid water tank.

[0024] When the floor needs to be antifreeze, the waste heat of the evaporative cooling liquid can be used to exchange heat with the antifreeze liquid to achieve efficient use of the waste heat of the evaporative cooling liquid.

[0025] In some optional embodiments, the heating pipeline has a plurality of heating branches, and the return pipeline also has a plurality of return branches, the heating branches correspond to the return branches one by one, and the corresponding heating branches and return branches are used to be connected to one of the heating elements; a second control valve is provided on the heating branch, and a third control valve is provided on the return branch;

[0026] The controller is used to control the conduction state of the second control valve to control the antifreeze liquid to be delivered to the heating element of the floor in the low-temperature storage; and is used to control the conduction state of the third control valve to deliver the antifreeze liquid that has heated the heating element of the floor in the low-temperature storage to the heat exchanger through the antifreeze liquid component.

[0027] In this way, it is possible to implement floor antifreeze for different low-temperature storages, that is, to implement zone antifreeze for different low-temperature storages.

[0028] In some optional embodiments, the refrigeration circuit includes a condensing pipeline and a liquid supply pipeline, the first end of the condensing pipeline is connected to the refrigeration terminal through a gas-liquid separator, the second end of the condensing pipeline is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid supply pipeline, the second end of the liquid supply pipeline is connected to the refrigeration terminal through the gas-liquid separator, the compressor is located in the condensing pipeline, and the liquid supply pipeline is connected to the liquid drop pipeline;

[0029] The controller is used to control the conduction state of the condensation pipeline to transport the high-temperature gaseous refrigerant generated by the compressor to the condenser, and / or control the conduction state of the liquid supply pipeline to transport the evaporative cooling liquid condensed by the condenser to the liquid supply pipeline.

[0030] The waste heat of the evaporative cooling liquid is recovered and utilized, and the antifreeze liquid after heat exchange with the evaporative cooling liquid is transported to the heating element of the floor in the low-temperature storage for antifreeze of the low-temperature storage floor.

[0031] In some optional embodiments, it further comprises: a liquid return pipeline, the liquid return pipeline being connected to the heat exchanger and the gas-liquid separator respectively;

[0032] The controller is used to control the conduction state of the liquid return pipeline to transport the evaporated cooling liquid after heat exchange with the antifreeze liquid in the heat exchanger to the gas-liquid separator and then to the refrigeration terminal.

[0033] When the evaporative cooling liquid exchanges heat with the antifreeze liquid through the heat exchanger, the liquid supercooling of the evaporative cooling liquid entering the refrigeration end is reduced, thereby improving the efficiency of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

[0035] Figure 1 This is a schematic diagram of the structure of a low-temperature warehouse floor antifreeze control system provided by an embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of the specific structure of a low-temperature warehouse floor antifreeze control system provided by an embodiment of the present application;

[0037] Figure 3 is a structural schematic diagram of an electronic device provided by another embodiment of the present application;

[0038] Figure 4 It is a flow chart of a low-temperature storage floor antifreeze control method provided by an embodiment of the present application;

[0039] Figure 5 It is a flow chart of a low-temperature storage floor antifreeze control method provided by another embodiment of the present application;

[0040] Figure 6 This is a flow chart of low-temperature storage refrigeration provided by an embodiment of the present application.

[0041] In the figure, 1. refrigeration terminal; 2. compressor; 3. condenser; 4. heat exchanger; 5. antifreeze assembly; 51. antifreeze pump; 52. first control valve; 53. antifreeze water tank; 6. buried coil; 7. refrigeration circuit; 71. condensing pipeline; 72. liquid supply pipeline; 8. antifreeze circuit; 81. heating pipeline; 811. heating branch; 812. second control valve; 82. return pipeline; 821. return branch; 822. third control valve; 9. liquid drop pipeline; 10. liquid return pipeline; 11. gas-liquid separator; 12. siphon tank; 13. liquid distributor; 14. liquid collector; 15. heating element. DETAILED DESCRIPTION

[0042] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0043] In order to facilitate the understanding of the embodiments of the present application, the relevant contents about the low-temperature warehouse floor antifreeze control system are first introduced here.

[0044] A low-temperature warehouse is a warehouse that uses cooling facilities to create a suitable temperature and low-temperature environment. Due to the large temperature difference between the inside and outside of the low-temperature warehouse, the floor of the low-temperature warehouse should be laid with an insulation layer with a thickness suitable for the warehouse temperature. However, it cannot completely isolate the transfer of heat, but can only reduce the speed of heat transfer.

[0045] Among some technologies, there are currently three ways to prevent the floor of low-temperature warehouses from freezing, namely, overhead ventilation of the floor, use of liquid heating, and electric heating. Among them, floor heating is convenient to manage, safe and reliable, but it is easily restricted by the floor height and maintenance structure. Under the condition of limited low-temperature warehouse projects, electric heating consumes a lot of electricity. Therefore, considering factors such as heat recovery of the refrigeration system and low initial investment, liquid heating for floor heating is a priority measure.

[0046] However, in the liquid heating method, the oil pipe heating system design usually utilizes the heat of the high-temperature gas discharged from the compressor. After cooling by the heat exchanger, it is easy to cause the gas to carry liquid in the circuit, thereby reducing the heat exchange efficiency.

[0047] In order to solve the technical problem that in the above-mentioned liquid heating method, the oil pipe heating system design usually utilizes the heat of the high-temperature gas discharged by the compressor, which is easy to cause the gas to carry liquid in the circuit after cooling by the heat exchanger, thereby reducing the heat exchange efficiency, the present invention proposes a low-temperature warehouse floor anti-freezing control system. The implementation details of the low-temperature warehouse floor anti-freezing control system of this embodiment are specifically described below. The following content is only the implementation details provided for the convenience of understanding and is not necessary for the implementation of this solution.

[0048] Embodiment 1:

[0049] The implementation details of the low-temperature warehouse floor antifreeze control system of this embodiment are specifically described below. The following content is only provided for the convenience of understanding the implementation details and is not necessary for the implementation of this solution.

[0050] The embodiment of the present invention provides a low temperature warehouse floor antifreeze control system, such as Figure 1 As shown, it includes: a refrigeration circuit 7 formed by a refrigeration terminal 1, a compressor 2 and a condenser 3 connected in sequence along the circulation direction of the refrigerant, and an antifreeze circuit 8 connected to the refrigeration circuit 7; the antifreeze circuit 8 is provided with a heat exchanger 4 and an antifreeze liquid component 5, a first input end of the heat exchanger 4 is connected to the condenser 3 through a liquid drop pipe 9, a second input end of the heat exchanger 4 is connected to the antifreeze liquid component 5, and an output end of the heat exchanger 4 is used to connect to a heating element 15 of the floor in the low-temperature storage;

[0051] The controller is connected to the refrigeration circuit 7 and the antifreeze circuit 8, and is used to deliver the evaporative cooling liquid generated by the condenser 3 into the heat exchanger 4 through the liquid delivery pipeline 9, and to deliver the antifreeze liquid to the heat exchanger 4 through the antifreeze liquid component 5, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger 4, and the antifreeze liquid after heat exchange is delivered to the heating element 15 of the floor in the low-temperature storage.

[0052] In this embodiment, the refrigeration terminal 1 can also be called a cold air machine, and the condenser 3 is an evaporative condenser 3. The refrigeration terminal 1, the compressor 2 and the condenser 3 are connected in sequence. The refrigeration return air generated by the refrigeration terminal 1 after refrigeration is transported to the compressor 2. After the compressor 2 discharges the high-temperature gaseous refrigerant, the high-temperature gaseous refrigerant is transported to the condenser 3. The evaporative cooling liquid is generated by the condenser 3, and the evaporative cooling liquid is transported into the heat exchanger 4 through the liquid pipeline 9. At the same time, the antifreeze is transported to the heat exchanger 4 through the antifreeze component 5, so that the antifreeze and the evaporative cooling liquid are heat-exchanged in the heat exchanger 4, and the antifreeze after heat exchange is transported to the heating element 15 of the floor in the low-temperature storage. In this way, the evaporative cooling liquid generated by the evaporative condenser 3 has a large amount of heat, and the waste heat of the evaporative cooling liquid is recycled and utilized. The antifreeze after heat exchange with the evaporative cooling liquid is transported to the heating element 15 of the floor in the low-temperature storage for antifreezing of the floor of the low-temperature storage. In some examples, the antifreeze liquid includes ethylene glycol antifreeze liquid, which is used as an example of the antifreeze liquid here and is not used as a limitation on the present embodiment. The antifreeze liquid of the present application may also be other antifreeze liquids that can exchange heat with the evaporative cooling liquid to heat the floor.

[0053] In this embodiment, a stop valve, a check valve and a pressure gauge are provided on the liquid drop pipeline 9, wherein the stop valve controls the conduction state of the liquid drop pipeline 9, the check valve is used to prevent the evaporative cooling liquid input to the heat exchanger 4 from flowing back, and the pressure gauge is used to check whether the liquid drop pipeline 9 is in a normal working state. In addition, the heating element 15 of the floor in the low-temperature storage is an underground coil 6, and the antifreeze liquid after heat exchange is transported to the underground coil 6 to prevent freezing of the floor of the low-temperature storage.

[0054] It should be understood that compared with the traditional method of using the heat of the high-temperature gas discharged from the compressor 2 to prevent the floor from freezing, the high-temperature and high-pressure gas discharged from the compressor 2 may partially vaporize when cooled, resulting in the existence of a two-phase flow of high-temperature steam and liquid, which can easily lead to a reduction in the heat exchange efficiency of the heat exchanger 4. In this embodiment, the evaporative cooling liquid generated by the condenser 3 can directly enter the heat exchanger 4 to exchange heat with the antifreeze liquid, so that the antifreeze liquid after heat exchange with the evaporative cooling liquid heats the floor, realizing efficient use of waste heat, and avoiding the situation where the heat exchange efficiency is reduced due to gas carrying liquid.

[0055] In some embodiments, the antifreeze circuit 8 includes a heating pipeline 81 and a return pipeline 82, the first end of the heating pipeline 81 is connected to the output end of the heat exchanger 4, the second end of the heating pipeline 81 and the first end of the return pipeline 82 are both used to connect to the heating element 15 of the floor in the low-temperature storage, the second end of the return pipeline 82 is connected to the second input end of the heat exchanger 4, and the antifreeze liquid component 5 is located in the return pipeline 82;

[0056] The controller is used to control the conduction state of the heating pipeline 81 to transport the antifreeze liquid after heat exchange to the heating element 15 of the floor in the low-temperature storage, and / or to control the conduction state of the return pipeline 82 to transport the antifreeze liquid heated by the heating element 15 of the floor in the low-temperature storage to the heat exchanger 4 through the antifreeze liquid component 5.

[0057] In this embodiment, the antifreeze liquid after heat exchange with the evaporative cooling liquid in the heat exchanger 4 is transported to the heating element 15 of the floor in the low-temperature storage through the heating pipeline 81. It should be noted that a check valve is provided in the heating pipeline 81 to prevent the antifreeze liquid after heat exchange from flowing back to the heat exchanger 4 in the heating pipeline 81. When the antifreeze liquid heats the heating element 15 and the temperature of the antifreeze liquid is not enough to prevent the floor of the low-temperature storage from freezing after heating for a period of time, the return pipeline 82 is controlled to be open, so that the antifreeze liquid with a lowered temperature flows back to the heat exchanger 4 through the return pipeline 82 to exchange heat with the newly generated evaporative cooling liquid of the condenser 3 again. In this way, by directly using the waste heat of the evaporative cooling liquid to provide a heat source for floor heating, the need to provide an electric heating pipe heat source in the circulating oil pool in the conventional liquid heating method is eliminated, and at the same time, the situation that the steam carries liquid when the exhaust heat gas of the compressor 2 is used for heat exchange, resulting in low heat exchange efficiency, is avoided.

[0058] In some embodiments, the antifreeze liquid assembly 5 includes: an antifreeze liquid pump 51, a first control valve 52, and an antifreeze liquid tank 53 which are sequentially connected along the reflux direction of the reflux pipeline 82; the first end of the antifreeze liquid pump 51 is used to connect to the heating element 15 of the floor in the low-temperature storage, the second end of the antifreeze liquid pump 51 is connected to the first end of the antifreeze liquid tank 53 through the first control valve 52, and the second end of the antifreeze liquid tank 53 is connected to the second input end of the heat exchanger 4;

[0059] The controller is used to control the conduction state of the first control valve 52 to control the antifreeze liquid heated by the heating element 15 of the floor in the low-temperature storage to flow back to the antifreeze liquid tank 53.

[0060] In this embodiment, the reflux direction of the reflux pipeline 82 is from the heating element 15 to the heat exchanger 4, and the antifreeze pump 51, the first control valve 52 and the antifreeze water tank 53 are sequentially connected along the reflux direction of the reflux pipeline 82. The antifreeze pump 51 is used to pump the antifreeze liquid whose temperature is reduced in the heating element 15 of the floor. When the temperature of the antifreeze liquid is not enough to antifreeze the floor, it can be conducted through the first control valve 52, so as to control the antifreeze liquid heated by the heating element 15 of the floor in the low temperature storage to return to the antifreeze water tank 53 and then be transported to the heat exchanger 4. In some examples, the first control valve 52 is a stop valve, and the first control valve 52 is provided between the antifreeze pump 51 and the antifreeze water tank 53 and between the antifreeze water tank 53 and the heat exchanger 4. The first control valve 52 between the antifreeze water tank 53 and the heat exchanger 4 is used to control the antifreeze liquid to be transported to the heat exchanger 4 when the antifreeze liquid needs to be heated again. In this way, when the floor needs to be antifreeze, the waste heat of the evaporative cooling liquid can be used to exchange heat with the antifreeze liquid, so as to achieve efficient use of the waste heat of the evaporative cooling liquid.

[0061] Further, in order to realize floor antifreeze for different low-temperature storages, that is, to perform zone antifreeze for different low-temperature storages, the heating pipeline 81 has a plurality of heating branches 811, and the return pipeline 82 also has a plurality of return branches, and the heating branches 811 correspond to the return branches one by one, and the corresponding heating branches 811 and return branches are used to be connected to a heating element 15; a second control valve 812 is provided on the heating branch 811, and a third control valve 822 is provided on the return branch;

[0062] The controller is used to control the conduction state of the second control valve 812 to control the antifreeze liquid to be delivered to the heating element 15 of the floor in the low-temperature storage; and is used to control the conduction state of the third control valve 822 to deliver the antifreeze liquid heated by the heating element 15 of the floor in the low-temperature storage to the heat exchanger 4 through the antifreeze liquid component 5.

[0063] It should be understood that different low-temperature storages have different antifreeze requirements, and therefore, different low-temperature storages need to be managed for antifreeze in different zones. Figure 1 and Figure 2As shown, the heating pipeline 81 has a plurality of heating branches 811, and the return pipeline 82 also has a plurality of return branches. The heating branches 811 correspond to the return branches one by one, and the number of the heating branches 811 and the number of the return branches are the same as the number of the heating elements 15. The corresponding heating branches 811 and the return branches are used to connect with the heating elements 15 of the floor in the low-temperature storage, so as to control the antifreeze of the corresponding floor. In some examples, the second control valve 812 and the third control valve 822 are both liquid supply solenoid valves. Through the second control valve 812, the heating branch 811 can be controlled to be turned on, so as to control the antifreeze liquid to be delivered to the heating element 15 of the floor in the low-temperature storage; through the third control valve 822, the return branch can be controlled to be turned on, so as to deliver the antifreeze liquid heated by the heating element 15 of the floor in the low-temperature storage to the heat exchanger 4 through the antifreeze liquid assembly 5.

[0064] In some examples, a liquid separator 13 is provided in the heating pipeline 81, and the antifreeze is diverted to different heating branches 811 through the liquid separator 13 to provide the antifreeze after heat exchange to the heating elements 15 of the floors in different low-temperature storages; correspondingly, a liquid collector 14 is provided in the return pipeline 82, and the antifreeze after heating the heating elements 15 of the floors in different low-temperature storages is collected through the liquid collector 14 and then uniformly transported to the heat exchanger 4.

[0065] In some embodiments, the refrigeration circuit 7 includes a condensing line 71 and a liquid supply line 72, a first end of the condensing line 71 is connected to the refrigeration terminal 1 through a gas-liquid separator 11, a second end of the condensing line 71 is connected to a first end of the condenser 3, a second end of the condenser 3 is connected to a first end of the liquid supply line 72, a second end of the liquid supply line 72 is connected to the refrigeration terminal 1 through the gas-liquid separator 11, a compressor 2 is located in the condensing line 71, and the liquid supply line 72 is connected to the liquid drop line 9;

[0066] The controller is used to control the conduction state of the condensation pipeline 71 to transport the high-temperature gaseous refrigerant generated by the compressor 2 to the condenser 3, and / or control the conduction state of the liquid supply pipeline 72 to transport the evaporative cooling liquid condensed by the condenser 3 to the liquid drop pipeline 9.

[0067] In this embodiment, the first input end of the gas-liquid separator 11 is connected to the refrigeration terminal 1, and is used to input the refrigeration return air generated after refrigeration at the refrigeration terminal 1. The second input end of the gas-liquid separator 11 is connected to the second end of the condenser 3 through the siphon tank 12, and is used to input the evaporative cooling liquid generated by the condenser 3. The first output end of the gas-liquid separator 11 is connected to the compressor 2, and is used to deliver the refrigeration return air to the compressor 2. The second output end of the gas-liquid separator 11 is connected to the refrigeration terminal 1, and is used to deliver the evaporative cooling liquid after heat exchange with the antifreeze liquid to the refrigeration terminal 1. In some examples, a stop valve is provided in the condensation pipeline 71 to control the conduction state of the condensation pipeline 71, so as to control the high-temperature gaseous refrigerant generated by the compressor 2 to be delivered to the condenser 3.

[0068] In this embodiment, the refrigeration return air generated after refrigeration at the refrigeration terminal 1 is transported to the compressor 2 through the condensation pipeline 71. After the compressor 2 discharges the high-temperature gaseous refrigerant, the high-temperature gaseous refrigerant is transported to the condenser 3. The evaporative cooling liquid is generated through the condenser 3. The evaporative cooling liquid passes through the liquid supply pipeline 72 and the liquid drop pipeline 9 in turn and enters the heat exchanger 4. At the same time, the antifreeze liquid is transported to the heat exchanger 4 through the antifreeze liquid component 5, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger 4, and the antifreeze liquid after heat exchange is transported to the heating element 15 of the floor in the low-temperature storage. In this way, the waste heat of the evaporative cooling liquid is recycled, and the antifreeze liquid after heat exchange with the evaporative cooling liquid is transported to the heating element 15 of the floor in the low-temperature storage for antifreezing of the low-temperature storage floor.

[0069] In some embodiments, the low temperature storage floor antifreeze control system further includes: a liquid return pipeline 10, the liquid return pipeline 10 is connected to the heat exchanger 4 and the gas-liquid separator 11 respectively;

[0070] The controller is used to control the conduction state of the liquid return pipeline 10 to transport the evaporated cooling liquid after heat exchange with the antifreeze liquid in the heat exchanger 4 to the gas-liquid separator 11 and then to the refrigeration terminal 1.

[0071] In this embodiment, the first end of the liquid return line 10 is connected to the heat exchanger 4, and the second end of the liquid return line 10 is connected to the gas-liquid separator 11, so as to transport the evaporative cooling liquid after heat exchange with the antifreeze to the gas-liquid separator 11 and then to the refrigeration terminal 1. In some examples, a stop valve, a check valve and a pressure gauge are provided on the liquid return line 10, wherein the conduction state of the liquid return line 10 is controlled by the stop valve, the check valve is used to prevent the evaporative cooling liquid after heat exchange with the antifreeze from flowing back when it is input into the gas-liquid separator 11, and the pressure gauge is used to check whether the liquid return line 10 is in a normal working state. In this way, when the evaporative cooling liquid exchanges heat with the antifreeze through the heat exchanger 4, the liquid supercooling of the evaporative cooling liquid entering the refrigeration terminal 1 is reduced, thereby improving the efficiency of the refrigeration system.

[0072] Embodiment 2:

[0073] like Figure 4 As shown, an embodiment of the present invention further provides a low-temperature warehouse floor antifreeze control method, which is applicable to the low-temperature warehouse floor antifreeze control system in embodiment 1. The low-temperature warehouse floor antifreeze control method includes:

[0074] Step 101, detecting whether the floor temperature of the low temperature storage is less than a first preset temperature threshold.

[0075] Specifically, the first preset temperature threshold is usually set at 1°C. When the floor temperature of the low-temperature storage is less than 1°C, it indicates that there is a large temperature difference between the inside and outside of the low-temperature storage, and the heat transfer rate is fast, so the floor of the low-temperature storage needs to be anti-freezing.

[0076] Step 102, when it is detected that the floor temperature of the low-temperature storage is lower than the first preset temperature threshold, the liquid drop pipeline is controlled to be turned on, and the evaporative cold liquid generated by the condenser is sent to the heat exchanger through the liquid drop pipeline.

[0077] Specifically, when the floor temperature of the low-temperature storage is lower than the first preset temperature threshold, the floor of the low-temperature storage needs to be protected from freezing. The stop valve on the liquid drop pipeline is controlled to be in an on state so that the liquid drop pipeline can be turned on, so that the evaporative cold liquid generated by the condenser can enter the heat exchanger through the liquid drop pipeline.

[0078] Step 103, delivering antifreeze liquid to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger.

[0079] Specifically, while the evaporative cooling liquid generated by the condenser enters the heat exchanger through the liquid drop pipeline, the antifreeze liquid is transported to the heat exchanger through the antifreeze liquid assembly, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger, thereby using the waste heat of the evaporative cooling liquid to raise the temperature of the antifreeze liquid.

[0080] Step 104, transporting the antifreeze liquid after heat exchange to the heating element of the floor in the low-temperature storage.

[0081] Specifically, the antifreeze liquid after heat exchange is transported to the heating element of the floor in the low-temperature storage. Since the heat of the evaporative cooling liquid generated by the evaporative condenser is large, the waste heat of the evaporative cooling liquid is recovered and utilized, and the antifreeze liquid after heat exchange with the evaporative cooling liquid is transported to the heating element of the floor in the low-temperature storage for antifreezing of the low-temperature storage floor.

[0082] In this embodiment, it is detected whether the floor temperature of the low-temperature storage is less than the first preset temperature threshold. When it is detected that the floor temperature of the low-temperature storage is less than the first preset temperature threshold, the liquid drop pipeline is controlled to be connected, and the evaporative cooling liquid generated by the condenser is sent to the heat exchanger through the liquid drop pipeline. At the same time, the antifreeze is transported to the heat exchanger through the antifreeze assembly, so that the antifreeze and the evaporative cooling liquid exchange heat in the heat exchanger, and then the antifreeze after heat exchange is transported to the heating element of the floor in the low-temperature storage. In this way, the evaporative cooling liquid generated by the condenser can directly enter the heat exchanger to exchange heat with the antifreeze, so that the antifreeze after heat exchange with the evaporative cooling liquid heats the floor, realizing efficient use of waste heat, and avoiding the situation where the heat exchange efficiency is reduced due to gas carrying liquid.

[0083] In some embodiments, after the antifreeze liquid after heat exchange is transported to the heating element of the floor in the low temperature storage, the method further includes:

[0084] Detecting whether the floor temperature of the low-temperature storage is greater than or equal to a second preset temperature threshold, wherein the second preset temperature threshold is greater than the first preset temperature threshold;

[0085] When it is detected that the floor temperature of the low-temperature storage is greater than or equal to the second preset temperature threshold, the return line is controlled to be closed, so that the antifreeze liquid heated by the heating element remains in the heating element of the floor in the low-temperature storage.

[0086] Specifically, when the antifreeze liquid after heat exchange with the evaporative cooling liquid heats the floor for a period of time, it is necessary to periodically detect whether the floor temperature of the low-temperature storage is greater than or equal to the second preset temperature threshold. In some examples, the second preset temperature threshold is set to 5°C. When the floor temperature of the low-temperature storage is greater than or equal to 5°C, it indicates that there is no need to antifreeze the floor of the low-temperature storage.

[0087] In this embodiment, when it is detected that the floor temperature of the low-temperature storage is greater than or equal to the second preset temperature threshold, it indicates that the heating of the floor in the low-temperature storage needs to be stopped, and thus the return line is controlled to be closed. At this time, the antifreeze cannot enter the heat exchanger through the return line, that is, the antifreeze heated by the heating element is kept in the heating element of the floor in the low-temperature storage. In some examples, when the heating of the floor in the low-temperature storage is stopped, the floor temperature of each low-temperature storage is continuously monitored. When the floor temperature is less than the first preset temperature threshold, it is heated again. At this time, the return line is in a conducting state, and the antifreeze heated by the heating element enters the heat exchanger through the return line to exchange heat with the evaporative cooling liquid.

[0088] Embodiment three:

[0089] like Figure 1 and Figure 5 As shown, this embodiment provides exemplary contents of Embodiment 1 and Embodiment 2, that is, provides an exemplary process of a low-temperature warehouse floor antifreeze control system and method, and the specific contents include:

[0090] like Figure 6 As shown in the figure, the low-temperature warehouse floor antifreeze control system can provide heat source for the floor antifreeze measures of the low-temperature warehouses that share this system, using the waste heat of the refrigeration unit on the evaporation of the cooling liquid. Different low-temperature warehouses used in the same system (refrigeration host) are divided into different heating zones, and the zoning is achieved by setting a liquid supply header and a liquid return header on the main trunk and setting a stop valve on the header branch.

[0091] The control of the low-temperature warehouse floor antifreeze control system is mainly divided into two modes, namely, the floor heating start command and the floor heating stop command, which are mainly judged according to the floor temperature range and the antifreeze liquid return temperature.

[0092] Mode 1 - floor heating instruction: The average temperature calculated through the temperature feedback of sensors at different positions on the ground is used to determine whether it is 1≤t≤3℃. If the floor temperature is less than 1℃, it is determined to be in a state where floor heating is required. First, the instruction for floor heating is fed back to the refrigeration unit. At this time, the stop valve of the liquid drop pipeline 9 is opened. At this time, the shell side of the heat exchanger 4 is filled with refrigerant, and the check valve and stop valve in the return liquid pipeline 10 (also called the cooling circuit) are opened for 2 minutes to prevent the liquid in the heat exchanger 4 from containing gas, resulting in uneven heat exchange. When the inside of the heat exchanger 4 is filled with antifreeze liquid, the antifreeze pump 51 (i.e., ethylene glycol pump) is opened after a delay of 5 to 10 minutes, and the cooling circuit system starts to work normally. The antifreeze (i.e., ethylene glycol) after heat exchange with the liquid drop of the evaporative condenser 3 can be sent to various buried coils 6 for heating. Figure 2 As shown, each branch of the return line 82 and the heating line 81 is provided with a stop valve, and each branch can be provided with a pressure gauge for detection to ensure uniform liquid supply in each branch. Through the design of this system, the buried coils 6 can be divided into independent parts after the liquid distributor 13, and the low-temperature storages that share a refrigeration system (refrigeration unit) can independently open the liquid supply solenoid valve to heat the floor on demand according to the detected floor temperature, avoiding waste of waste heat energy.

[0093] Mode 2 - Stop floor heating command: When the antifreeze circuit 8 is operating normally, when the glycol antifreeze provides enough heat to the ground (when the temperature sensor at the antifreeze circuit determines that the floor temperature is ≥5°C), it is fed back to the refrigeration unit to stop floor heating. At this time, the liquid supply solenoid valve of the corresponding floor low-temperature storage heating pipeline 81 is closed. When there is no low-temperature storage floor that needs to be heated in the refrigeration system, the glycol pump is first closed, and then the liquid supply solenoid valve of the heating pipeline 81 is closed, and the liquid supply solenoid valve of the return pipeline 82 and the stop valve of the return pipeline 10 are closed in turn. The system continuously monitors the floor temperature of each low-temperature storage, and when it needs to be heated again, it switches to mode 1 in time.

[0094] In view of the problems existing in the above-mentioned prior art, the present invention proposes to lead the liquid drop pipeline 9 from the liquid supply pipeline 72 to the heat exchanger 4 for heat exchange with ethylene glycol antifreeze. Directly utilizing the waste heat of the refrigeration system to provide a heat source for floor heating eliminates the need for an electric heating pipe heat source to be provided in the circulating oil pool in the conventional liquid heating method, and at the same time avoids the situation where the steam carries liquid when the compressor 2 exhausts heat gas for heat exchange, resulting in low heat exchange efficiency. At the same time, it can reduce the supercooling of the evaporative cold drop liquid and improve the economy of the refrigeration system. The proposal of this application also improves the way in which the heated antifreeze in the antifreeze circuit 8 system is sent to the floor, that is, by setting a distributor and collector 14, different low-temperature warehouses using the same refrigeration system (i.e., the refrigeration host) are divided into zones. For low-temperature warehouses with different floor heating requirements, the refrigeration host controls the circulation of different circuits by controlling the liquid supply solenoid valve, thereby realizing on-demand heating of the floors of different low-temperature warehouses and avoiding heat waste and excessive heating of the floor. The present application also proposes an improved method for determining floor heating. First, the floor surface temperature is detected to determine whether the floor needs to be heated. Then, the temperature of the antifreeze liquid circuit after the floor is heated is detected to determine whether the low-temperature storage floor has met the heating requirements and whether heating needs to be stopped.

[0095] Embodiment 4:

[0096] Another embodiment of the present application relates to an electronic device, such as Figure 3 As shown, it includes: at least one processor 901; and a memory 902 that is communicatively connected to the at least one processor 901; wherein the memory 902 stores instructions that can be executed by the at least one processor 901, and the instructions are executed by the at least one processor 901 so that the at least one processor 901 can execute the low-temperature storage floor antifreeze control method in the above-mentioned embodiments.

[0097] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0098] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0099] Embodiment five:

[0100] Another embodiment of the present application relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0101] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as: ROM), random access memory (Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.

[0102] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A low temperature warehouse floor antifreeze control system, characterized in that: include: A refrigeration circuit formed by a refrigeration terminal, a compressor and a condenser connected in sequence along the circulation direction of the refrigerant, and an antifreeze circuit connected to the refrigeration circuit; the antifreeze circuit is provided with a heat exchanger and an antifreeze liquid component, the first input end of the heat exchanger is connected to the condenser through a liquid drop pipeline, the second input end of the heat exchanger is connected to the antifreeze liquid component, and the output end of the heat exchanger is used to connect to the heating element of the floor in the low-temperature storage; A controller is connected to the refrigeration circuit and the antifreeze circuit, and is used to deliver the evaporative cooling liquid generated by the condenser into the heat exchanger through the liquid delivery pipeline, and to deliver antifreeze liquid to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger, and the antifreeze liquid after heat exchange is delivered to the heating element of the floor in the low-temperature storage.

2. The low temperature storage floor antifreeze control system according to claim 1 is characterized in that: The antifreeze circuit includes a heating pipeline and a return pipeline, the first end of the heating pipeline is connected to the output end of the heat exchanger, the second end of the heating pipeline and the first end of the return pipeline are both used to connect to the heating element of the floor in the low-temperature storage, the second end of the return pipeline is connected to the second input end of the heat exchanger, and the antifreeze liquid component is located in the return pipeline; The controller is used to control the conduction state of the heating pipeline to transport the antifreeze liquid after heat exchange to the heating element of the floor in the low-temperature storage, and / or to control the conduction state of the return pipeline to transport the antifreeze liquid after heating the heating element of the floor in the low-temperature storage to the heat exchanger through the antifreeze liquid component.

3. The low temperature storage floor antifreeze control system according to claim 2 is characterized in that: The antifreeze liquid assembly comprises: an antifreeze liquid pump, a first control valve and an antifreeze liquid water tank which are sequentially connected along the reflux direction of the reflux pipeline; the first end of the antifreeze liquid pump is used to connect with the heating element of the floor in the low temperature storage, the second end of the antifreeze liquid pump is connected with the first end of the antifreeze liquid water tank through the first control valve, and the second end of the antifreeze liquid water tank is connected with the second input end of the heat exchanger; The controller is used to control the conduction state of the first control valve to control the antifreeze liquid after heating the heating element of the floor in the low-temperature storage to flow back to the antifreeze liquid water tank.

4. The low temperature storage floor antifreeze control system according to claim 2 is characterized in that: The heating pipeline has a plurality of heating branches, and the return pipeline also has a plurality of return branches, the heating branches correspond to the return branches one by one, and the corresponding heating branches and return branches are used to be connected to one of the heating elements; a second control valve is provided on the heating branch, and a third control valve is provided on the return branch; The controller is used to control the conduction state of the second control valve to control the antifreeze liquid to be delivered to the heating element of the floor in the low-temperature storage; and is used to control the conduction state of the third control valve to deliver the antifreeze liquid that has heated the heating element of the floor in the low-temperature storage to the heat exchanger through the antifreeze liquid component.

5. The low temperature storage floor antifreeze control system according to claim 1 is characterized in that: The refrigeration circuit includes a condensing pipeline and a liquid supply pipeline, the first end of the condensing pipeline is connected to the refrigeration terminal through a gas-liquid separator, the second end of the condensing pipeline is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid supply pipeline, the second end of the liquid supply pipeline is connected to the refrigeration terminal through the gas-liquid separator, the compressor is located in the condensing pipeline, and the liquid supply pipeline is connected to the liquid drop pipeline; The controller is used to control the conduction state of the condensation pipeline to transport the high-temperature gaseous refrigerant generated by the compressor to the condenser, and / or control the conduction state of the liquid supply pipeline to transport the evaporative cooling liquid condensed by the condenser to the liquid supply pipeline.

6. The low temperature storage floor antifreeze control system according to claim 5 is characterized in that: Also includes: A liquid return pipeline, the liquid return pipeline is connected to the heat exchanger and the gas-liquid separator respectively; The controller is used to control the conduction state of the liquid return pipeline to transport the evaporated cooling liquid after heat exchange with the antifreeze liquid in the heat exchanger to the gas-liquid separator and then to the refrigeration terminal.

7. A method for controlling the antifreeze of the floor of a low-temperature warehouse, characterized in that: The method for applying the low-temperature storage floor antifreeze control system according to any one of claims 1 to 6 comprises: Detecting whether the floor temperature of the low-temperature storage is less than a first preset temperature threshold; When it is detected that the floor temperature of the low-temperature storage is lower than the first preset temperature threshold, the liquid drop pipeline is controlled to be turned on, and the evaporative cold liquid generated by the condenser is sent to the heat exchanger through the liquid drop pipeline; The antifreeze liquid is transported to the heat exchanger through the antifreeze liquid component, so that the antifreeze liquid and the evaporative cooling liquid exchange heat in the heat exchanger; The antifreeze liquid after heat exchange is transported to the heating element of the floor in the low temperature storage.

8. The low temperature storage floor antifreeze control method according to claim 7 is characterized in that: After the antifreeze liquid after heat exchange is transported to the heating element of the floor in the low temperature storage, it also includes: Detecting whether the floor temperature of the low-temperature storage is greater than or equal to a second preset temperature threshold, wherein the second preset temperature threshold is greater than the first preset temperature threshold; When it is detected that the floor temperature of the low-temperature storage is greater than or equal to the second preset temperature threshold, the return line is controlled to be closed so that the antifreeze liquid heated by the heating element remains in the heating element of the floor in the low-temperature storage.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the low-temperature storage floor antifreeze control method as described in any one of claims 7 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the low-temperature storage floor antifreeze control method described in any one of claims 7 to 8 is implemented.

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