Phase change cold storage liquid cooling device

Abstract

The utility model relates to a phase change cold storage liquid cooling device, which is characterized in that a compressor is connected back to a heat exchanger through a condenser, another heat stroke of the heat exchanger is connected out of a three-way valve to a primary water tank, the primary water tank is divided into two paths through a circulating pump, one path is connected back to the heat exchanger, and the other path is connected back to the three-way valve after being connected with a direct cooling condenser; the lower end of the first-stage water tank is further connected with a liquid cooling heat exchanger through another circulating pump and an electric three-way valve, the liquid cooling heat exchanger is connected to the first-stage water tank, the electric three-way valve is further connected to the first-stage water tank, the liquid cooling heat exchanger is connected into a load through a liquid return pipe, and a liquid return valve, a flow sensor and a temperature sensor are sequentially arranged on the liquid return pipe. The liquid supply pipe is connected with the secondary water tank through the water tank temperature sensor, and the lower end of the secondary water tank is connected out through the circulating pump, the filter, the liquid supply temperature sensor, the liquid supply pressure sensor and the liquid supply valve in sequence. The system is simple in structure, and can meet the requirements of high-low temperature difference and instant switching load side constant-temperature refrigeration supply.

Description

Technical Field

[0001] This utility model relates to a liquid cooling device, specifically a phase change cold storage liquid cooling device. Background Technology

[0002] In existing compression refrigeration liquid cooling structures, conventional methods involve heat exchange via a heat exchanger. The returned liquid from the load is cooled within the heat exchanger and then supplied to the load. However, with increasing demands on load liquid cooling supply, some sensitive and high-precision electronic applications require liquid cooling with small fluctuations and high precision, necessitating a constant-temperature liquid supply. The compressor system, through pressurization and throttling, creates high and low-pressure sides. When operating above a threshold, pressure control forces the compressor to shut down, causing periodic fluctuations in the compressor-side refrigerant supply. Furthermore, issues such as refrigerant charging, expansion valve opening control failures, and unstable gas-liquid separation in the gas-liquid separator ultimately lead to fluctuations in cooling capacity on the load liquid cooling side, failing to meet the constant-temperature cooling supply requirements. Additionally, when significant temperature fluctuations occur on the load side, the required temperature fluctuations on the compression side are also significant, resulting in instantaneous high power consumption on the compression side, which the load side cannot quickly meet with the instantaneous constant-temperature cooling supply. Summary of the Invention

[0003] This invention provides a phase change cold storage liquid cooling device with a simple structure that can meet the constant temperature cooling supply requirements on the load side.

[0004] The technical solution adopted by this utility model is: a phase change cold storage liquid cooling device, including a compressor, a condenser, and a heat exchanger. The compressor is connected to the heat exchanger via the condenser and then back to the compressor. The device is characterized by further including a primary water tank, a liquid-cooled heat exchanger, and a secondary water tank. The other heat range of the heat exchanger is connected to the primary water tank via a first electric three-way valve. A temperature sensor is installed in the primary water tank. The lower end of the primary water tank is divided into two paths by a first circulation pump: one path connects back to the other heat range of the heat exchanger, and the other path connects to the direct-cooling condenser and then to the first electric three-way valve. The lower end of the primary water tank is also connected to a second circulation pump. The pump and the second electric three-way valve are connected to the first hot end of the liquid-cooled heat exchanger. The first hot end of the liquid-cooled heat exchanger is connected to the first-stage water tank. The second electric three-way valve is also connected to the first-stage water tank. The other hot end of the liquid-cooled heat exchanger is connected to the load via a return pipe. A return valve, a flow sensor, and a temperature sensor are installed sequentially on the return pipe. The other hot end of the liquid-cooled heat exchanger is connected to the load via a supply pipe. The supply pipe is connected to the second-stage water tank via a water tank temperature sensor. A heater is installed in the second-stage water tank. The lower end of the second-stage water tank is connected sequentially via the third circulating pump, a filter, a supply temperature sensor, a supply pressure sensor, and a supply valve.

[0005] The condenser is connected to the heat exchanger via a liquid receiver, a dryer filter, and an expansion valve.

[0006] Both the primary and secondary water tanks are equipped with liquid level sensors, and both the primary and secondary water tanks are equipped with liquid replenishment ports.

[0007] A bypass pipeline branches off from the filter and connects back to the secondary water tank, with a bypass valve installed on the bypass pipeline.

[0008] The lower ends of the primary water tank and the secondary water tank are connected by a connecting pipeline, which is equipped with a connecting valve and a two-way pump.

[0009] This invention employs a primary water tank and heat exchanger for heat exchange. The refrigerant in the primary water tank is kept at a constant temperature before being sent to a liquid-cooled heat exchanger to exchange heat with the return and supply liquid pipes on the load side. Combined with a secondary water tank on the load side, this ensures a stable liquid cooling flow rate for the return and supply liquid, thus comprehensively guaranteeing a constant-temperature cooling supply to the load side. When the load side experiences a constant low-temperature difference, a compressor is unnecessary; heat exchange can be achieved directly from the primary water tank via a direct-cooling condenser. When switching from a low-temperature difference to a high-temperature difference on the load side, a double-suction pump can be used to send the refrigerant from the primary water tank to the secondary water tank to meet the instantaneous cooling demand during the switch. The reverse is true when switching from a high-temperature difference to a low-temperature difference. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model.

[0011] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0012] In the diagram: 1. Compressor; 2. High-pressure switch; 3. Condenser; 4. Condenser fan; 5. Liquid receiver; 6. Dryer filter; 7. Expansion valve; 8. Heat exchanger; 9. Low-pressure switch; 10. First electric three-way valve; 11. Primary water tank; 12. Temperature sensor; 13. Liquid level sensor; 14. Liquid inlet; 15. First circulation pump; 16. Direct-cooling condenser; 17. Second circulation pump; 18. Second electric three-way valve; 19. Liquid-cooled heat exchanger; 20. Return pipe; 21. Return valve; 22. Return flow sensor; 23. Return temperature sensor; 24. Supply pipe; 25. Water tank temperature sensor; 26. Secondary water tank; 27. Heater; 28. Third circulation pump; 29. ​​Filter; 30. Supply temperature sensor; 31. Supply pressure sensor; 32. Supply valve; 33. Bypass pipe; 34. Bypass valve; 35. Connecting pipe; 36. Connecting valve; 37. Two-way pump. Detailed Implementation

[0013] The following description, in conjunction with the accompanying drawings and embodiments, provides further details.

[0014] Figure 1The first embodiment shown describes a phase change cold storage liquid cooling device. The compressor 1 exhaust gas passes sequentially through a high-pressure switch 2, a condenser 3, a liquid receiver 5, a dryer filter 6, and an expansion valve 7 to a heat exchanger 8 (one hot pass). The exhaust gas is then returned to the compressor via a low-pressure switch 9. The other hot pass of the heat exchanger 8 is connected to a primary water tank 11 via a first electric three-way valve 10. The primary water tank 11 is equipped with a temperature sensor 12 and a liquid level sensor 13. A liquid replenishment port 14 is located on the primary water tank 11. The lower end of the primary water tank 11 is split into two paths by a first circulation pump 15: one path returns to the other hot pass of the heat exchanger 8, and the other path connects to a direct-cooling condenser 16 before being sent to the first electric three-way valve 10. The condenser 3 and the direct-cooling condenser 16 share a condensing fan 4. The lower end of the primary water tank 11 is also connected to a liquid-cooled heat exchanger 19 (one hot pass) via a second circulation pump 17 and a second electric three-way valve 18. One hot end of the heat exchanger 19 is connected to the primary water tank 11, and the second electric three-way valve 18 is also connected to the primary water tank 11. The other hot end of the liquid-cooled heat exchanger 19 is connected to the load via the return pipe 20. The return pipe 20 is sequentially equipped with a return valve 21, a return flow sensor 22, and a return temperature sensor 23. The other hot end of the liquid-cooled heat exchanger 19 is connected to the load via a supply pipe 24. The supply pipe 24 is connected to the secondary water tank 26 via the water tank temperature sensor 25. The secondary water tank 26 is equipped with a heater 27, a liquid level sensor, and a replenishment port. The lower end of the secondary water tank 26 is connected sequentially via a third circulating pump 28, a filter 29, a supply temperature sensor 30, a supply pressure sensor 31, and a supply valve 32. After the filter, a bypass pipe 33 is branched off and connected back to the secondary water tank 26. A bypass valve 34 is installed on the bypass pipe 33.

[0015] Figure 2 The difference between Embodiment 2 and Embodiment 1 is that the lower ends of the primary water tank 11 and the secondary water tank 26 are connected by a connecting pipe 35, and a connecting valve 36 and a bidirectional pump 37 are installed on the connecting pipe 35.

Claims

1. A phase change cold storage liquid cooling device, comprising a compressor, a condenser, and a heat exchanger, wherein the compressor is connected to the heat exchanger via the condenser for one thermal pass and then back to the compressor, characterized in that: It also includes a primary water tank, a liquid-cooled heat exchanger, and a secondary water tank. The other hot end of the heat exchanger is connected to the primary water tank via a first electric three-way valve. The primary water tank is equipped with a temperature sensor. The lower end of the primary water tank is split into two paths by a first circulation pump. One path is connected back to the other hot end of the heat exchanger, and the other path is connected to the direct-cooling condenser and then sent to the first electric three-way valve. The lower end of the primary water tank is also connected to the first hot end of the liquid-cooled heat exchanger via a second circulation pump and a second electric three-way valve. The first hot end of the liquid-cooled heat exchanger is connected to the primary water tank. The second electric three-way valve is also connected to the primary water tank. The other hot end of the liquid-cooled heat exchanger is connected to the load via a return pipe. The return pipe is equipped with a return valve, a flow sensor, and a temperature sensor in sequence. The other hot end of the liquid-cooled heat exchanger is connected to the load via a supply pipe. The supply pipe is connected to the secondary water tank via a water tank temperature sensor. The secondary water tank is equipped with a heater. The lower end of the secondary water tank is connected to the load via a third circulation pump, a filter, a supply temperature sensor, a supply pressure sensor, and a supply valve in sequence.

2. The phase change cold storage liquid cooling device according to claim 1, characterized in that: The condenser is connected to the heat exchanger via a liquid receiver, a dryer filter, and an expansion valve.

3. The phase change cold storage liquid cooling device according to claim 1, characterized in that: Both the primary and secondary water tanks are equipped with liquid level sensors, and both the primary and secondary water tanks are equipped with liquid replenishment ports.

4. The phase change cold storage liquid cooling device according to claim 1, characterized in that: A bypass pipeline branches off from the filter and connects back to the secondary water tank, with a bypass valve installed on the bypass pipeline.

5. The phase change cold storage liquid cooling device according to claim 1, characterized in that: The lower ends of the primary water tank and the secondary water tank are connected by a connecting pipeline, which is equipped with a connecting valve and a two-way pump.

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