Waste heat utilization type cold storage anti-freezing system

Abstract

According to the waste heat utilization type cold storage anti-freezing system, a floor anti-freezing device located on the bottom face of a cold storage and a cold storage door anti-freezing device located on a cold storage door of the cold storage are arranged in the cold storage, and the floor anti-freezing device and the cold storage door anti-freezing device are communicated with a condenser; the condenser comprises a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is connected with an exhaust port of a refrigeration compressor located on the outer side of the refrigeration house, the refrigerant outlet is connected with the air cooler, the air cooler is connected with the evaporator, and the evaporator is connected with the refrigeration compressor. The evaporator can absorb heat in the refrigeration house, high-temperature and low-pressure refrigerant gas in the evaporator is conveyed to the refrigeration compressor through the outlet of the evaporator, and the high-temperature and high-pressure gas is subjected to heat exchange and cooling through the refrigerant in the condenser through the exhaust port of the refrigeration compressor; the cooling liquid in the condenser conveys absorbed heat to the cold storage door anti-freezing device and the cold storage floor anti-freezing device through pipelines, the phenomena of freezing and deformation of a flexible sealing piece of the cold storage door are reduced, and the phenomenon that the cold storage floor is frozen to be damaged due to low temperature can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage antifreeze, in particular to a waste heat utilization type cold storage antifreeze system. Background Art

[0002] Cold storage is a kind of low-temperature refrigeration equipment with waste heat utilization and antifreeze system. Usually the temperature inside the storage is below -10℃. The inner surface of the cold storage is paved with insulation materials to prevent the cold from leaking out.

[0003] During the actual use of the cold storage, although the ground is paved with insulation materials, it is still impossible to avoid the continuous cooling of the cold storage floor. Long-term low temperature causes freezing of the cold storage floor and frost heaving of the foundation, which seriously threatens the safety of the cold storage staff and the cold storage building structure; and due to the frequent entry and exit of staff and goods and the influence of the temperature difference between the inside and outside of the warehouse, the flexible seals between the cold storage door frame and the cold storage door are often frozen and deformed, which in turn affects the difficulty of opening and closing the cold storage door and the insulation effect of the cold storage. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a waste heat utilization type cold storage antifreeze system.

[0005] The technical solution of this utility model is as follows:

[0006] A waste heat utilization cold storage antifreeze system is arranged in the cold storage, wherein a floor antifreeze device located on the bottom surface of the cold storage and a cold storage door antifreeze device located on the cold storage door are arranged in the cold storage, and the floor antifreeze device and the cold storage door antifreeze device are respectively connected to the condenser;

[0007] The condenser includes a refrigerant inlet and a refrigerant outlet. The refrigerant inlet is connected to the exhaust port of the refrigeration compressor located outside the cold storage, and the refrigerant outlet is connected to the air cooler. The air cooler is connected to the evaporator located in the cold storage through an electronic expansion valve, and the output end of the evaporator is connected to the air inlet of the refrigeration compressor through a pipeline.

[0008] Refrigeration compressor, condenser, cold storage floor antifreeze device, air cooler, electronic expansion valve and evaporator can form a floor antifreeze circulation loop;

[0009] The refrigeration compressor, condenser, cold storage door antifreeze device, air cooler, electronic expansion valve and evaporator can form a cold storage door antifreeze circulation loop.

[0010] The utility model makes full use of the waste heat of the high-temperature and high-pressure refrigerant gas at the outlet of the refrigeration compressor, which can not only prevent freezing and heat the cold storage floor, but also heat the internal and external temperatures of the flexible seals of the cold storage door frame to prevent deformation of the flexible seals, making the cold storage more convenient to use, effectively improving the efficiency of the cold storage refrigeration system, and extending the service life of the cold storage.

[0011] The connection structure between the above-mentioned floor antifreeze device and the condenser is that the condenser also includes a coolant inlet and a coolant outlet. One end of the cold storage door antifreeze device is connected to the coolant inlet through a first pipe with a first solenoid valve, and the other end is connected to the coolant outlet through a third pipe with a third solenoid valve, so that the heated coolant in the condenser transfers heat to the cold storage door antifreeze device, thereby heating up the flexible seal of the cold storage door.

[0012] Regarding the connection structure between the floor antifreeze and the condenser, one end of the floor antifreeze is connected to the coolant inlet through a second pipe with a second solenoid valve, and the other end is connected to the inlet of the third solenoid valve through a fourth pipe, and the outlet of the third solenoid valve is connected to the coolant outlet, so that the heated coolant in the condenser transfers heat to the floor antifreeze, so that the floor antifreeze is heated.

[0013] Regarding the specific structure of the cold storage door antifreeze device, the cold storage door antifreeze device is a metal round tube that is wrapped around the door frame of the cold storage door. The metal round tube is arranged in a flexible seal on the cold storage door, and the flexible seal wraps the metal round tube.

[0014] To facilitate controlling the temperature of the flexible seal, a first temperature sensor electrically connected to the first solenoid valve is provided on the flexible seal. The first solenoid valve can be disconnected when the temperature of the flexible seal rises to 25°C and closed when the temperature drops to 20°C.

[0015] The above-mentioned floor antifreeze device is set at a position where the floor of the cold storage is provided with a floor insulation layer, and the floor antifreeze device is set below the floor insulation layer.

[0016] Regarding the connection structure between the flexible seal and the metal round tube, the flexible seal is provided with a buffer groove and a pipe groove along its length direction. The buffer groove can buffer the metal round tube installed therein to prevent damage and leakage caused by long-term friction between the metal round tube and the cold storage door frame. The flexible seal has an inner ring and an outer ring. The pipe groove is arranged close to the inner ring, the buffer groove is arranged close to the outer ring, and the metal round tube is inserted in the pipe groove.

[0017] The area of ​​the cold storage floor is large, and the heat required by the cold storage door is much smaller than the heat required by the floor. To ensure that the floor can reach a suitable temperature, the inner diameter of the first pipe is set to 1 / 3-2 / 3 of the inner diameter of the second pipe. The first pipe is arranged on the cold storage door. The first pipe is thinner than the second pipe. To reduce unnecessary heat loss, the length of the first pipe is set shorter than the length of the second pipe, shortening the time for the high-temperature coolant to quickly reach the cold storage door 8 from the condenser.

[0018] The beneficial effects of the present invention are:

[0019] The evaporator can absorb the heat in the cold storage, and transport the high-temperature and low-pressure refrigerant gas in it to the refrigeration compressor through its outlet to generate high-temperature and high-pressure gas. The exhaust port of the refrigeration compressor cools down the high-temperature and high-pressure gas through the refrigerant heat exchange of the condenser. The coolant in the condenser transports the absorbed heat to the cold storage door antifreeze device and the cold storage floor antifreeze device through pipelines respectively. The cold storage door antifreeze device and the cold storage floor antifreeze device are heated by the waste heat, and the cold storage floor and the cold storage door are heated to the appropriate temperature, reducing the freezing and deformation of the flexible seals of the cold storage door, and can also reduce the phenomenon of the cold storage floor being frozen by low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the attached picture:

[0021] Figure 1 It is a structural schematic diagram;

[0022] Figure 2 It is a schematic diagram of the structure of the freezer door;

[0023] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram of the structure;

[0024] The components represented by the reference numerals in the figure are:

[0025] 1. Refrigeration compressor; 2. Evaporator; 3. Electronic expansion valve; 4. Air cooler; 5. Condenser; 51. Refrigerant inlet; 52. Refrigerant outlet; 53. Coolant inlet; 54. Coolant outlet; 6. Floor antifreeze device; 7. Cold storage door antifreeze device; 8. Cold storage door; 9. Cold storage; 10. First solenoid valve; 11. Second solenoid valve; 12. Third solenoid valve; 13. Flexible seal; 131. Buffer tank; 132. Pipe groove; 14. Metal round tube; 15. First pipeline; 16. Second pipeline; 17. Third pipeline. DETAILED DESCRIPTION

[0026] See also Figure 1 A waste heat utilization cold storage 9 antifreeze system is shown, which is arranged in the cold storage 9. The cold storage 9 is provided with a floor antifreeze device 6 located on its bottom surface and a cold storage door antifreeze device 7 located on its cold storage door 8. A floor insulation layer is provided under the ground of the cold storage 9. The floor antifreeze device 6 is arranged under the floor insulation layer. The floor antifreeze device 6 is a water pipe with a certain length. The floor antifreeze device 6 and the cold storage door antifreeze device 7 are arranged in a serpentine shape and are respectively connected to the condenser 5 outside the cold storage 9.

[0027] The condenser 5 includes a refrigerant inlet 51, a refrigerant outlet 52, a coolant inlet 53 and a coolant outlet 54. The condenser 5 is of prior art. The refrigerant inlet 51 is connected to the exhaust port of the refrigeration compressor 1 located outside the cold storage 9. The coolant in the condenser 5 can absorb the heat from the high-temperature and high-pressure gas delivered by the refrigeration compressor 1. The floor antifreeze 6 is connected to the coolant of the condenser 5, so that the floor antifreeze 6 is heated. The refrigerant outlet 52 is connected to the air cooler 4, and the air cooler 4 is connected to the evaporator 2 located in the cold storage 9 through the electronic expansion valve 3. The output end of the evaporator 2 is connected to the air inlet of the refrigeration compressor 1 through a pipeline.

[0028] In the above structure, the evaporator 2 can absorb the heat in the cold storage 9, and transport the high-temperature and low-pressure refrigerant gas therein to the refrigeration compressor 1 through its outlet to generate high-temperature and high-pressure gas. The exhaust port of the refrigeration compressor 1 cools down the high-temperature and high-pressure gas through the refrigerant heat exchange of the condenser 5, so that the coolant in the condenser 5 transports the absorbed heat to the cold storage door antifreeze device 7 and the floor antifreeze device 6 through the pipeline respectively. The first solenoid valve 10 can control the temperature of the cold storage door antifreeze device 7, and the second solenoid valve 11 can control the temperature of the floor antifreeze device 6. The temperature output from the output ends of the cold storage door antifreeze device 7 and the floor antifreeze device 6 All of them can be transmitted to the refrigerant outlet 52 through the third solenoid valve 12, the refrigerant outlet 52 is connected to the inlet of the air cooler 4 outside the cold storage 9 through a pipeline, the outlet of the air cooler 4 is connected to the evaporator 2 through the base expansion valve, and the evaporator 2 is connected to the refrigeration compressor 1 to realize circulation, so that the above-mentioned refrigeration compressor 1, condenser 5, cold storage 9 floor antifreeze device 6, air cooler 4, electronic expansion valve 3 and evaporator 2 can form a floor antifreeze circulation loop; the refrigeration compressor 1, condenser 5, cold storage door antifreeze device 7, air cooler 4, electronic expansion valve 3 and evaporator 2 can form a cold storage door 8 antifreeze circulation loop.

[0029] Regarding the connection structure between the electronic expansion valve 3 and the air cooler 4 and the evaporator 2 , the electronic expansion valve 3 has a high-pressure inlet and a low-pressure outlet, the outlet of the air cooler 4 is connected to the high-pressure inlet, and the low-pressure outlet is connected to the inlet of the evaporator 2 .

[0030] The connection structure between the above-mentioned cold storage door antifreeze device 7 and the condenser 5 is as follows: one end of the cold storage door antifreeze device 7 is connected to the coolant inlet 53 through a first pipe 15 with a first solenoid valve 10, and the other end is connected to the coolant outlet 54 through a third pipe 17 with a third solenoid valve 12, so that the heated coolant in the condenser 5 transfers heat to the cold storage door antifreeze device 7, so that the flexible seal of the cold storage door 8 is heated, thereby reducing the occurrence of icing and deformation of the flexible seal of the cold storage door 8.

[0031] Regarding the connection structure between the floor antifreeze device 6 and the condenser 5, one end of the floor antifreeze device 6 is connected to the coolant inlet 53 through the second pipe 16 with the second solenoid valve 11, and the other end is connected to the inlet of the third solenoid valve 12 through the fourth pipe, and the outlet of the third solenoid valve 12 is connected to the coolant outlet 54, so that the heated coolant in the condenser 5 transfers heat to the floor antifreeze device 6, so that the floor antifreeze device 6 is heated. The connection structure between the second pipe 16 and the first pipe 15, one end of the second pipe 16 is connected to one end of the floor antifreeze device 6, and the other end is connected to the first pipe 15, so that the coolant inlet 53 is connected to the first solenoid valve 10 and the second solenoid valve 11 respectively through only one first pipe 15, avoiding the coolant inlet 53 being connected to the first pipe 15 and the second pipe 16 at the inlet, which is convenient for installing the pipe. The area of ​​the cold storage floor is large, and the heat required by the cold storage door 8 is much smaller than the heat required by the floor. The inner diameter of the first pipe 15 is set to 1 / 3-2 / 3 of the inner diameter of the second pipe 16, and the first pipe 15 is arranged on the cold storage door 8. The pipe is thinner than the second pipe 16. In order to reduce heat loss, the length of the first pipe 15 is set shorter than the length of the second pipe 16.

[0032] Regarding the specific structure of the cold storage door antifreeze device 7, the cold storage door antifreeze device 7 is a metal round tube 14 that is wrapped around the door frame of the cold storage door 8. The metal round tube 14 is arranged in a flexible seal 13 on the cold storage door 8. The flexible seal 13 wraps the metal round tube 14. The flexible seal 13 is provided with a buffer groove 131 and a pipe groove 132 along its length direction. The buffer groove 131 can play a buffering role for the metal round tube 14 installed therein, avoiding damage and leakage caused by long-term friction between the metal round tube 14 and the cold storage door frame; the pipe groove 132 is an arc-shaped or circular structure, and the metal round tube 14 can be inserted into the pipe groove 132. The flexible seal 13 includes multiple sections of sealing strips that are sealed and connected end to end in sequence, which is convenient for installing the metal round tube 14 therein. After the metal round tube 14 is installed, the multiple sections of sealing strips are sealed and connected and installed on the cold storage door. The flexible sealing member 13 has an inner ring and an outer ring. The pipe groove 132 is arranged close to the inner ring, the buffer groove 131 is arranged close to the outer ring, and the metal round tube 14 is inserted into the pipe groove 132 .

[0033] In order to facilitate the control of the temperature of the flexible seal, a first temperature sensor electrically connected to the first solenoid valve 10 is provided on the flexible seal. The first temperature sensor and its installation on the cold storage door 8 are prior art and are no longer shown in the figure. The first solenoid valve 10 can be disconnected when the temperature of the flexible seal rises to 25°C and closed when the temperature drops to 20°C.

[0034] In order to facilitate the control of the temperature of the floor antifreeze device 6, the floor antifreeze device 6 is provided with a second temperature sensor electrically connected to the second solenoid valve 11. The second temperature sensor and its installation on the floor antifreeze device 6 are prior art and are no longer shown in the figure. The second solenoid valve 11 can be disconnected when the temperature of the floor antifreeze device 6 rises to 10°C and closed when the temperature drops to 5°C.

Claims

1. A waste heat utilization cold storage antifreeze system, arranged in a cold storage (9), characterized in that: The cold storage (9) is provided with a floor antifreeze device (6) located on the bottom surface thereof and a cold storage door antifreeze device (7) located on the cold storage door (8) thereof, and the floor antifreeze device (6) and the cold storage door antifreeze device (7) are respectively connected to the condenser (5); The condenser (5) comprises a refrigerant inlet (51) and a refrigerant outlet (52), the refrigerant inlet (51) is connected to the exhaust port of a refrigeration compressor (1) located outside the cold storage (9), the refrigerant outlet (52) is connected to an air cooler (4), the air cooler (4) is connected to an evaporator (2) located in the cold storage (9) via an electronic expansion valve (3), and the output end of the evaporator (2) is connected to the air inlet of the refrigeration compressor (1); The refrigeration compressor (1), condenser (5), cold storage (9) floor antifreeze device (6), air cooler (4), electronic expansion valve (3) and evaporator (2) can form a floor antifreeze circulation loop; The refrigeration compressor (1), condenser (5), cold storage door antifreeze device (7), air cooler (4), electronic expansion valve (3) and evaporator (2) can form a cold storage door (8) antifreeze circulation loop.

2. The waste heat utilization cold storage antifreeze system according to claim 1 is characterized in that: The condenser (5) further comprises a cooling liquid inlet (53) and a cooling liquid outlet (54); one end of the cold storage door antifreeze device (7) is connected to the cooling liquid inlet (53) via a first pipeline (15) having a first solenoid valve (10), and the other end is connected to the cooling liquid outlet (54) via a third pipeline (17) having a third solenoid valve (12).

3. A waste heat utilization cold storage antifreeze system according to claim 2, characterized in that: One end of the floor antifreeze device (6) is connected to the coolant inlet (53) through a second pipeline (16) with a second electromagnetic valve (11), and the other end is connected to the inlet of the third electromagnetic valve (12) through a fourth pipeline.

4. The waste heat utilization cold storage antifreeze system according to claim 1 is characterized in that: The cold storage door antifreeze device (7) is a metal round tube (14) arranged around the door frame of the cold storage door (8); a flexible sealing member (13) is arranged around the frame of the cold storage door (8); and the metal round tube (14) is arranged inside the flexible sealing member (13).

5. The waste heat utilization cold storage antifreeze system according to claim 4 is characterized in that: The flexible seal is provided with a first temperature sensor electrically connected to the first solenoid valve (10). The first solenoid valve (10) can be disconnected when the temperature of the flexible seal rises to 25°C and closed when the temperature drops to 20°C.

6. The waste heat utilization cold storage antifreeze system according to claim 3 is characterized in that: The floor of the cold storage (9) is provided with a floor insulation layer, and the floor antifreeze device (6) is arranged below the floor insulation layer.

7. The waste heat utilization cold storage antifreeze system according to claim 4 is characterized in that: The flexible sealing member (13) is provided with a buffer groove (131) and a tube placement groove (132) along its length direction. The flexible sealing member (13) has an inner ring and an outer ring. The tube placement groove (132) is arranged close to the inner ring, and the buffer groove (131) is arranged close to the outer ring. The metal round tube (14) is inserted into the tube placement groove (132).

8. The waste heat utilization cold storage antifreeze system according to claim 2 is characterized in that: The inner diameter of the first pipe (15) is 1 / 3 to 2 / 3 of the inner diameter of the second pipe (16), and the length of the first pipe (15) is shorter than the length of the second pipe (16).

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