Refrigeration house floor heating anti-freezing system based on condenser waste heat

Abstract

The utility model provides a refrigeration house floor heating anti-freezing system based on condenser waste heat, which is characterized in that outlets of two condensers (1) are respectively connected to an inlet at the left upper end of a plate heat exchanger (3) through a condenser outlet pipe (11) and a plate heat exchange heating inlet pipe (12); an outlet in the lower left end of the plate heat exchanger (3) is connected to condenser inlet pipes (14) of the two condensers (1) through a plate heat exchange heating outlet pipe (13), the other end of a plate heat exchange heat supply inlet pipe (31) is connected to an inlet in the upper right end of the plate heat exchanger (3), and one ends of a plurality of heat supply valve assemblies (4) installed in parallel are connected with a heat supply collecting pipe (53). The other end of the heat supply valve assembly (4) is connected with an ethylene glycol buried pipe (9), and the other end of the ethylene glycol buried pipe (9) is connected to an ethylene glycol expansion water tank (5). The system utilizes waste heat of condensate water of the condenser (1), solves the technical problem of freezing of the floor of the refrigeration house, and is simple in structure and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage, in particular to the technical field of cold storage floor antifreeze, and specifically to a cold storage floor heating and antifreeze system based on condenser waste heat. Background Art

[0002] With the rapid growth of the scale of my country's cold chain logistics market, the number and scale of cold storage, as the key infrastructure for cold chain logistics, are also showing a rapid growth trend, especially the emergence of large cold storage, super-large cold storage and high-rise three-dimensional cold storage, which provide strong support for the vigorous development of cold storage logistics and cold chain technology in my country. However, with the continuous improvement of residents' quality of life and living standards, the types of cold storage have also shown diversified characteristics, especially the rapid growth of demand for low-temperature or ultra-low-temperature cold storage, such as cold storage (-18℃) or quick freezing storage (-30℃).

[0003] Because the floor of a low-temperature or ultra-low-temperature cold storage is affected by the low-temperature gas in the cold storage for a long time during long-term operation, it is very easy to freeze. In severe cases, it will damage the structure and floor of the cold storage. At present, in order to prevent the freezing of the floor of a low-temperature or ultra-low-temperature cold storage, the commonly used anti-freezing measures for the cold storage floor include overhead layer design, ground ventilation design, and floor heating based on ethylene glycol solution. Among them, the overhead layer design adopts the suspended cold storage construction method, which greatly increases the construction cost of the cold storage. The ground ventilation design is to set up several ventilation ducts in the cold storage floor, and use natural wind to antifreeze the cold storage floor. When the external environment of the cold storage is low, the antifreeze effect of this method is poor. Therefore, using ethylene glycol solution to heat the cold storage floor to prevent it from freezing is a common anti-freezing measure for the cold storage floor in low-temperature and ultra-low-temperature cold storage.

[0004] In the cold storage floor heating method based on ethylene glycol solution, when the temperature of the ethylene glycol solution transported to the cold storage floor is maintained in the range of 5~15℃, the heating effect on the cold storage floor is relatively ideal. However, in order to maintain the temperature of the ethylene glycol solution in the range of 5~15℃, the ethylene glycol solution is usually heated by external heating, which easily increases the operation and maintenance costs of the cold storage. In view of this, how to use the heat discharged to the external environment during the operation of the cold storage to heat the ethylene glycol solution, such as the waste heat of the condensed water of the condenser, not only avoids the waste of heat generated by the cold storage, but also reduces the operation and maintenance costs of the cold storage. Summary of the invention

[0005] In view of the above technical phenomenon, in order to solve the technical problem that the cold storage floor is frozen due to the influence of low-temperature gas in the cold storage for a long time, the utility model utilizes the waste heat of condensed water from the condenser to heat the ethylene glycol solution to achieve the purpose of preventing the cold storage floor from freezing, and proposes a cold storage floor heating and antifreeze system based on the waste heat of the condenser.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a cold storage floor heating and antifreeze system based on condenser waste heat, comprising a condenser, a heating valve assembly, a plate heat exchanger, an ethylene glycol buried pipe, a heating valve assembly and an ethylene glycol expansion water tank, wherein the outlets of the two condensers are respectively connected to the plate heat exchanger heating inlet pipe through the condenser outlet pipe, the plate heat exchanger heating inlet pipe is connected to the upper left inlet of the plate heat exchanger through the heating valve assembly, the lower left outlet of the plate heat exchanger is respectively connected to the condenser inlet pipes of the two condensers through the plate heat exchanger heating outlet pipe, the bottom outlet of the ethylene glycol expansion water tank is respectively connected to the plate heat exchanger heating inlet pipe and the heating transition pipe through the water tank outlet pipe, and the plate heat exchanger heating inlet pipe is connected to the lower left outlet of the plate heat exchanger through the plate heat exchanger heating outlet pipe. The other end of the inlet pipe is connected to the upper right inlet of the plate heat exchanger through the second solenoid valve, the other end of the heating transition pipe is connected to the heating header through the third solenoid valve, the first solenoid valve is installed on the plate heat exchanger heat outlet pipe at the lower right outlet of the plate heat exchanger, the other end of the plate heat exchanger heat outlet pipe is connected to the heating transition pipe between the third solenoid valve and the heating header, one end of several heating valve assemblies installed in parallel is connected to the heating header, the other ends of several heating valve assemblies are connected to the liquid inlet pipes of several ethylene glycol buried pipes, the return pipes of several ethylene glycol buried pipes are connected to several buried pipe return pipes, and the several buried pipe return pipes are connected to the ethylene glycol expansion water tank after passing through the return liquid header.

[0007] The heating valve assembly includes a first stop valve, a filter, a flexible pipe, a water pump and a second stop valve. The first stop valve and the second stop valve are respectively installed at both ends of the heating valve assembly. The filter is installed after the first stop valve along the flow direction of the medium in the plate exchanger heating inlet pipe. Two flexible pipes are respectively installed at the inlet and outlet of the water pump. The two flexible pipes and the water pump are installed between the filter and the second stop valve. A pressure gauge is installed on the flexible pipe between the filter and the water pump, and another pressure gauge is installed on the flexible pipe at the outlet of the water pump.

[0008] The heating valve assembly includes a fourth solenoid valve, a first stop valve, a filter, a flexible pipe, a water pump, a second stop valve, a first header and a check valve. The fourth solenoid valve, the first stop valve, the filter, the flexible pipe, the water pump and the second stop valve are installed in sequence on the pipeline between the heating header and the first header along the flow direction of the medium in the pipe. The start and stop control line of the fourth solenoid valve is connected to the system control assembly. Two flexible pipes are installed at the inlet and outlet of the water pump respectively. The two flexible pipes and the water pump are installed between the filter and the second stop valve. A pressure gauge is installed on the flexible pipe at the inlet of the water pump, and another pressure gauge is installed on the flexible pipe at the outlet of the water pump. The first stop valve, the filter and the check valve together constitute a heating branch pipe, and several heating branch pipes are installed in parallel on the first header.

[0009] The ethylene glycol buried pipe comprises a buried branch pipe inlet pipe and a buried branch pipe outlet pipe. A loop formed by a plurality of buried branch pipe inlet pipes and a plurality of buried branch pipe outlet pipes are arranged in groups of two in sequence in the ethylene glycol buried pipe. A plurality of buried branch pipe inlet pipes are respectively connected to a plurality of heating branch pipes of the first header in the heating valve assembly, and a plurality of buried branch pipe outlet pipes are respectively connected to a plurality of buried pipe return pipes.

[0010] The top inlet of the ethylene glycol expansion water tank is connected to the constant pressure water supply pipe, and the side inlet of the ethylene glycol expansion water tank is connected to the ethylene glycol supply pipe.

[0011] The core controller of the system control component is a programmable logic controller PLC, and the start and stop control lines of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are connected to the analog output end of the programmable logic controller PLC.

[0012] Compared with the prior art, the utility model is a cold storage floor heating and antifreeze system based on condenser waste heat. In order to prevent the freezing of low-temperature or ultra-low-temperature cold storage floors, the condensed water waste heat of the condenser is used as the heating source of the ethylene glycol solution. By adding a plate heat exchanger, the condensed water waste heat of the condenser heats the ethylene glycol solution in the ethylene glycol expansion water tank in the plate heat exchanger. The temperature of the ethylene glycol solution after passing through the plate heat exchanger is maintained within the range of 5-15°C, and then the heated ethylene glycol solution is transported to the ethylene glycol buried pipe of the cold storage floor through the heating valve assembly, thereby achieving the purpose of preventing the cold storage floor from freezing. The system utilizes the condensed water waste heat of the condenser to heat the ethylene glycol solution, solves the technical problem that the floor of the cold storage is frozen due to the influence of the low-temperature gas in the cold storage for a long time, realizes the recycling of the ethylene glycol solution, and also reduces the operation and maintenance costs of the cold storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall system principle diagram of the utility model;

[0014] Figure 2 This is a distribution structure diagram of the ethylene glycol underground pipe of the utility model;

[0015] Figure 3 This is a system schematic diagram of the heating valve assembly of the utility model;

[0016] Figure 4 This is a system schematic diagram of the heating valve assembly of the utility model.

[0017] The following are marked in the figure: 1: condenser; 11: condenser outlet pipe; 12: plate heat exchanger heating inlet pipe; 13: plate heat exchanger heating outlet pipe; 14: condenser inlet pipe; 2: heating valve assembly; 21: first stop valve; 22: filter; 23: flexible pipe; 24: water pump; 25: second stop valve; 26: first header; 3: plate heat exchanger; 31: plate heat exchanger heating inlet pipe; 32: plate heat exchanger heating outlet pipe; 4: heating valve assembly ; 41: the fourth solenoid valve; 42: the check valve; 5: the ethylene glycol expansion tank; 51: the water tank outlet pipe; 52: the heating transition pipe; 53: the heating header; 54: the buried pipe return pipe; 55: the ethylene glycol supply pipe; 56: the constant pressure water supply pipe; 57: the return liquid header; 6: the first solenoid valve; 7: the second solenoid valve; 8: the third solenoid valve; 9: the ethylene glycol buried pipe; 91: the buried branch pipe inlet pipe; 92: the buried branch pipe outlet pipe. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. They are for the purpose of making the technical problems, technical solutions and implementation effects to be solved by the present invention clearer.

[0019] Reference Figure 1-4A cold storage floor heating and antifreeze system based on condenser waste heat, comprising a condenser 1, a heating valve assembly 2, a plate heat exchanger 3, an ethylene glycol buried pipe 9, a heating valve assembly 4 and an ethylene glycol expansion water tank 5, wherein the outlets of the two condensers 1 are respectively connected to the plate heat exchanger heating inlet pipe 12 through the condenser outlet pipe 11, the plate heat exchanger heating inlet pipe 12 is connected to the upper left inlet of the plate heat exchanger 3 through the heating valve assembly 2, the lower left outlet of the plate heat exchanger 3 is respectively connected to the condenser inlet pipes 14 of the two condensers 1 through the plate heat exchanger heating outlet pipe 13, the bottom outlet of the ethylene glycol expansion water tank 5 is respectively connected to the plate heat exchanger heating inlet pipe 31 and the heating transition pipe 52 through the water tank outlet pipe 51, and the other end of the plate heat exchanger heating inlet pipe 31 is connected to the plate heat exchanger heating inlet pipe 31 through the second electromagnetic Valve 7 is connected to the upper right inlet of the plate heat exchanger 3, the other end of the heating transition pipe 52 is connected to the heating header 53 through the third solenoid valve 8, the first solenoid valve 6 is installed on the plate heat exchanger heat outlet pipe 32 at the lower right outlet of the plate heat exchanger 3, the other end of the plate heat exchanger heat outlet pipe 32 is connected to the heating transition pipe 52 between the third solenoid valve 8 and the heating header 53, one end of several heating valve assemblies 4 is connected to the heating header 53, the other end of several heating valve assemblies 4 installed in parallel is connected to the liquid inlet pipes of several ethylene glycol buried pipes 9, the return liquid pipes of several ethylene glycol buried pipes 9 are connected to several buried pipe return pipes 54, and several buried pipe return pipes 54 are connected to the ethylene glycol expansion water tank 5 after passing through the return liquid header 57.

[0020] The heating valve assembly 2 comprises a first stop valve 21, a filter 22, a flexible pipe 23, a water pump 24 and a second stop valve 25. The first stop valve 21 and the second stop valve 25 are respectively installed at both ends of the heating valve assembly 2. The first stop valve 21 and the second stop valve 25 are in a normally open state. The combined use of the first stop valve 21 and the second stop valve 25 facilitates the maintenance of the filter 22, the flexible pipe 23 and the water pump 24. The filter 22 is installed after the first stop valve 21 along the flow direction of the medium in the plate heat exchanger heating inlet pipe 12. The medium in the plate heat exchanger heating inlet pipe 12 is filtered by the filter 22. The water pump 2 Two flexible pipes 23 are respectively installed at the inlet and outlet of 4, and the two flexible pipes 23 and the water pump 24 are installed between the filter 22 and the second stop valve 25. When the water pump 24 is started, the high-temperature medium in the condenser 1 enters the plate heat exchanger 3 through the water pump 24. The two flexible pipes 23 are used together to absorb the thermal expansion and contraction caused by the temperature in the plate heat exchanger heating inlet pipe 12, so as to avoid the plate heat exchanger heating inlet pipe 12 from rupture or leakage due to excessive expansion and contraction. A pressure gauge is installed on the flexible pipe 23 at the inlet of the water pump 24, and another pressure gauge is installed on the flexible pipe 23 at the outlet of the water pump 24. The pressure gauge is used to measure the pressure of the inlet and outlet of the water pump 24.

[0021] The heating valve assembly 4 comprises a fourth solenoid valve 41, a first stop valve 21, a filter 22, a flexible pipe 23, a water pump 24, a second stop valve 25, a first header 26 and a check valve 42. The fourth solenoid valve 41, the first stop valve 21, the filter 22, the flexible pipe 23, the water pump 24 and the second stop valve 25 are sequentially installed on the pipeline between the heating header 53 and the first header 26 along the flow direction of the medium in the pipe. The first stop valve 21 and the second stop valve 25 are in a normally open state. The first stop valve 21 and the second stop valve 25 are used in combination to facilitate the maintenance of the filter 22, the flexible pipe 23 and the water pump 24. The impurities in the heating header 53 are filtered through the filter 22. The start and stop control line of the fourth solenoid valve 41 is connected to the system control assembly. Two flexible pipes 23 are respectively installed at the inlet and outlet of the water pump 24. The two flexible pipes 23 and the water pump 24 are installed between the filter 22 and the second stop valve 2 5, when the water pump 24 is started, the ethylene glycol solution in the ethylene glycol expansion water tank 5 will enter the ethylene glycol buried pipe 9 through the water pump 24, and the two flexible pipes 23 can be used together to absorb the thermal expansion and contraction caused by the temperature in the heating header 53, so as to avoid the heating header 53 from being broken or leaking due to excessive expansion and contraction. A pressure gauge is installed on the flexible pipe 23 between the filter 22 and the water pump 24, and another pressure gauge is installed on the flexible pipe 23 at the outlet of the water pump 24. The pressure of the inlet and outlet of the water pump 24 is measured by the pressure gauge. The first stop valve 21, the filter 22 and the check valve 42 together constitute a heating branch pipe, and several heating branch pipes are installed on the first header 26 in parallel. When the medium in the heating header 53 flows forward, the check valve 42 will open to allow the medium to pass smoothly; and when the medium flows in the reverse direction, the check valve 42 will close to prevent the fluid from flowing back, thereby avoiding the impact and damage of the medium flow on the heating header 53.

[0022] The ethylene glycol buried pipe 9 includes a buried branch pipe inlet pipe 91 and a buried branch pipe outlet pipe 92. The loop formed by a plurality of buried branch pipe inlet pipes 91 and a plurality of buried branch pipe outlet pipes 92 are arranged in pairs in sequence in the ethylene glycol buried pipe 9. The plurality of buried branch pipe inlet pipes 91 are respectively connected to a plurality of heating branch pipes of the first header 26 in the heating valve assembly 4, and the plurality of buried branch pipe outlet pipes 92 are respectively connected to a plurality of buried pipe return pipes 54. The ethylene glycol buried pipe 9 can be used to send the ethylene glycol solution after heat exchange to the ethylene glycol expansion water tank 5 again, thereby realizing the recycling of the ethylene glycol solution.

[0023] The top inlet of the ethylene glycol expansion water tank 5 is connected to the constant pressure water supply pipe 56, and the side inlet of the ethylene glycol expansion water tank 5 is connected to the ethylene glycol supply pipe 55. There are two media, aqueous solution and ethylene glycol solution, in the ethylene glycol expansion water tank 5. Since the density of the aqueous solution is lower than that of the ethylene glycol solution, the aqueous solution will be in the upper part of the ethylene glycol expansion water tank 5, and the ethylene glycol solution will be in the lower part of the ethylene glycol expansion water tank 5. When the pressure at the bottom outlet of the ethylene glycol expansion water tank 5 is insufficient, if the aqueous solution in the ethylene glycol expansion water tank 5 is insufficient, the aqueous solution is supplied to the ethylene glycol expansion water tank 5 through the constant pressure water supply pipe 56. If the ethylene glycol solution in the ethylene glycol expansion water tank 5 is insufficient, the ethylene glycol solution is supplied to the ethylene glycol expansion water tank 5 through the ethylene glycol supply pipe 55, thereby ensuring that the pressure at the bottom outlet of the ethylene glycol expansion water tank 5 is maintained within the design value range.

[0024] The core controller of the system control component is a programmable logic controller PLC. The start and stop control lines of the first solenoid valve 6, the second solenoid valve 7, the third magnetic stop valve 8 and the fourth solenoid valve 41 are connected to the analog output end of the programmable logic controller PLC of the system control component. When the system is in a shutdown state, the programmable logic controller PLC closes the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8 and the fourth solenoid valve 41; when the system is in a normal working state, if the floor is not frozen, the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8 and the fourth solenoid valve 41 are still in a closed state. If the floor is frozen and the temperature range in the glycol expansion water tank 5 is 5°C~15°C, the first solenoid valve 6 and the second solenoid valve 7 are still in a closed state, and the programmable logic controller PLC opens the third magnetic stop valve 8 and the fourth solenoid valve 41. If the floor is frozen and the temperature range in the glycol expansion water tank 5 is less than 5°C, the programmable logic controller PLC opens the second solenoid valve 7 and the first solenoid valve 6, closes the third solenoid valve 8, and the fourth solenoid valve 41 is still in an open state.

[0025] The cold storage floor heating and antifreeze system based on condenser waste heat is described. When the system is in a shutdown state, the programmable logic controller PLC closes the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8 and the fourth solenoid valve 41; when the system is in a normal working state, if the floor is not frozen, the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8 and the fourth solenoid valve 41 are still in a closed state. If the floor is frozen and the temperature of the ethylene glycol expansion water tank 5 is in the range of 5°C to 15°C, the first solenoid valve 6 and the second solenoid valve 7 are still in a closed state, and the programmable logic controller PLC closes the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8 and the fourth solenoid valve 41 are still in a closed state. The controller PLC opens the third solenoid valve 8 and the fourth solenoid valve 41, and the ethylene glycol solution in the ethylene glycol expansion water tank 5 enters the heating header 53 through the third solenoid valve 8 on the heating transition pipe 52. The heating header 53 delivers the ethylene glycol solution to the ethylene glycol buried pipe 9 through a number of heating valve assemblies 4 installed in parallel. The ethylene glycol solution in the ethylene glycol buried pipe 9 enters the ethylene glycol return pipe through a number of buried pipe return pipes 54. The ethylene glycol solution in the ethylene glycol return pipe enters the expansion water tank again. If the floor freezes and the temperature range of the ethylene glycol expansion water tank 5 is less than 5°C, The programmable logic controller PLC opens the second solenoid valve 7 and the first solenoid valve 6, closes the third solenoid valve 8, and the fourth solenoid valve 41 is still in the open state. The ethylene glycol solution in the ethylene glycol expansion water tank 5 enters the plate heat exchanger 3 through the second solenoid valve 7 on the plate heat exchanger heat inlet pipe 31, and performs heat exchange with the high-temperature medium entering the plate heat exchanger 3 through the plate heat exchanger heat inlet pipe 12 in the plate heat exchanger 3. The heated ethylene glycol solution enters the heat supply header 53 through the first solenoid valve 6 on the plate heat exchanger heat outlet pipe 32, and the ethylene glycol solution in the heat supply header 53 enters the ethylene glycol buried pipe through the fourth solenoid valve 41. 9, the ethylene glycol solution in the ethylene glycol buried pipe 9 enters the ethylene glycol return pipe through several buried pipe return pipes 54, and finally the ethylene glycol solution returns to the ethylene glycol expansion water tank 5 through the ethylene glycol return pipe, and the high-temperature medium in the plate heat exchanger heating inlet pipe 12 enters the plate heat exchanger heating outlet pipe 13 after the cold and heat exchange of the plate heat exchanger 3, and the medium in the plate heat exchanger heating outlet pipe 13 enters the condenser 1 again through the condenser inlet pipe 14. The waste heat of the condensed water of the condenser 1 is used to heat the ethylene glycol solution, so as to prevent the freezing of the cold storage floor, and also realize the recycling of the ethylene glycol solution and the condensed water.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold storage floor heating and antifreeze system based on condenser waste heat, comprising a condenser (1), a heating valve assembly (2), a plate heat exchanger (3), an ethylene glycol buried pipe (9), a heating valve assembly (4) and an ethylene glycol expansion water tank (5), characterized in that: The outlets of the two condensers (1) are respectively connected to the plate heat exchanger heating inlet pipe (12) through the condenser outlet pipe (11); the plate heat exchanger heating inlet pipe (12) is connected to the upper left inlet of the plate heat exchanger (3) through the heating valve assembly (2); the lower left outlet of the plate heat exchanger (3) is respectively connected to the condenser inlet pipes (14) of the two condensers (1) through the plate heat exchanger heating outlet pipe (13); the bottom outlet of the ethylene glycol expansion water tank (5) is respectively connected to the plate heat exchanger heating inlet pipe (31) and the heating transition pipe (52) through the water tank outlet pipe (51); the other end of the plate heat exchanger heating inlet pipe (31) is connected to the upper right inlet of the plate heat exchanger (3) through the second solenoid valve (7); the other end of the heating transition pipe (52) is connected to the upper right inlet of the plate heat exchanger (3) through the third solenoid valve (7); (8) is connected to the heating header (53), a first solenoid valve (6) is installed on the plate heat exchanger heat outlet pipe (32) at the lower right outlet of the plate heat exchanger (3), the other end of the plate heat exchanger heat outlet pipe (32) is connected to the heating transition pipe (52) between the third solenoid valve (8) and the heating header (53), one end of a plurality of heating valve assemblies (4) is connected to the heating header (53), the other end of a plurality of heating valve assemblies (4) installed in parallel is connected to the liquid inlet pipes of a plurality of ethylene glycol buried pipes (9), the liquid return pipes of a plurality of ethylene glycol buried pipes (9) are connected to a plurality of buried pipe return pipes (54), and the plurality of buried pipe return pipes (54) are connected to the ethylene glycol expansion water tank (5) after passing through the liquid return header (57).

2. According to claim 1, a cold storage floor heating and antifreeze system based on condenser waste heat is characterized by: The heating valve assembly (2) comprises a first stop valve (21), a filter (22), a flexible pipe (23), a water pump (24) and a second stop valve (25). The first stop valve (21) and the second stop valve (25) are respectively installed at two ends of the heating valve assembly (2). The filter (22) is installed after the first stop valve (21) along the flow direction of the medium in the plate heat exchanger inlet pipe (12). Two flexible pipes (23) are respectively installed at the inlet and outlet of the water pump (24). The two flexible pipes (23) and the water pump (24) are installed between the filter (22) and the second stop valve (25). A pressure gauge is installed on the flexible pipe (23) between the filter (22) and the water pump (24), and another pressure gauge is installed on the flexible pipe (23) at the outlet of the water pump (24).

3. According to claim 1, a cold storage floor heating and antifreeze system based on condenser waste heat is characterized in that: The heating valve assembly (4) comprises a fourth solenoid valve (41), a first stop valve (21), a filter (22), a flexible pipe (23), a water pump (24), a second stop valve (25), a first header (26) and a check valve (42). The fourth solenoid valve (41), the first stop valve (21), the filter (22), the flexible pipe (23), the water pump (24) and the second stop valve (25) are sequentially installed on the pipeline between the heating header (53) and the first header (26) along the flow direction of the medium in the pipeline. The start and stop control of the fourth solenoid valve (41) is The control line is connected to the system control component, two flexible pipes (23) are respectively installed at the inlet and outlet of the water pump (24), the two flexible pipes (23) and the water pump (24) are installed between the filter (22) and the second stop valve (25), a pressure gauge is installed on the flexible pipe (23) at the inlet of the water pump (24), and another pressure gauge is installed on the flexible pipe (23) at the outlet of the water pump (24), the first stop valve (21), the filter (22) and the check valve (42) together constitute a heating branch pipe, and a plurality of heating branch pipes are installed in parallel on the first header (26).

4. According to claim 1, a cold storage floor heating and antifreeze system based on condenser waste heat is characterized in that: The ethylene glycol buried pipe (9) comprises a buried branch pipe inlet pipe (91) and a buried branch pipe outlet pipe (92). A loop formed by a plurality of buried branch pipe inlet pipes (91) and a plurality of buried branch pipe outlet pipes (92) are arranged in groups of two in sequence in the ethylene glycol buried pipe (9). The plurality of buried branch pipe inlet pipes (91) are respectively connected to a plurality of heating branch pipes of the first header (26) in the heating valve assembly (4), and the plurality of buried branch pipe outlet pipes (92) are respectively connected to a plurality of buried pipe return pipes (54).

5. According to claim 1, a cold storage floor heating and antifreeze system based on condenser waste heat is characterized in that: The top inlet of the ethylene glycol expansion water tank (5) is connected to the constant pressure water supply pipe (56), and the side inlet of the ethylene glycol expansion water tank (5) is connected to the ethylene glycol supply pipe (55).

6. According to claim 3, a cold storage floor heating and antifreeze system based on condenser waste heat is characterized in that: The core controller of the system control component is a programmable logic controller (PLC), and the start and stop control lines of the first solenoid valve (6), the second solenoid valve (7), the third solenoid valve (8) and the fourth solenoid valve (41) are connected to the analog output end of the programmable logic controller (PLC).

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