Refrigerant cold storage type liquid cooling device

Abstract

The utility model discloses a refrigerant cold accumulation type liquid cooling device which comprises a compressor refrigerating system composed of a compressor, a condenser, a throttling device and a first evaporator, a refrigerant cold accumulation system composed of a cold accumulation liquid storage device, a refrigerant pump and a second evaporator, and a cooling liquid supply system composed of a water tank, a circulating pump and a thermal load. Wherein the compressor refrigerating system and the refrigerant cold storage system share a first evaporator with double flow channels to achieve heat exchange of flowing media, and the refrigerant cold storage system and the cooling liquid supply system share a second evaporator with double flow channels to achieve heat exchange of the flowing media. According to the liquid cooling device, cooling is carried out through evaporation phase change heat absorption of a refrigerant, the cold storage capacity is good, and the size and the weight of the liquid cooling device can be greatly reduced while it is ensured that the cold storage capacity can meet the requirement.

Description

Technical Field

[0001] The utility model relates to the field of liquid cooling equipment, in particular to a refrigerant cold storage type liquid cooling device. Background Art

[0002] At present, more and more electronic devices are beginning to use liquid cooling for heat dissipation and cooling to ensure their normal and reliable operation. Some high-power electronic devices, such as lasers, often work for a short period of time and then rest for a period of time. For this working mode, cold storage liquid cooling equipment is generally used. However, conventional cold storage liquid cooling equipment is a single-phase cold storage medium, which requires a large amount of cold storage medium, and the resulting volume and weight will be large. If the volume of the cold storage liquid cooling equipment is reduced, the cold storage capacity will be small and cannot meet the use requirements. In order to reduce the volume and weight of liquid cooling equipment, the use of phase change cold storage will become an important research direction for cold storage liquid cooling equipment. Utility Model Content

[0003] The utility model provides a refrigerant cold storage type liquid cooling device which utilizes the refrigerant evaporation phase change heat absorption to realize the cooling of electronic equipment, so as to solve the problem that the cold storage type liquid cooling device using a single-phase cold storage medium in the prior art cannot meet the use demand due to the limited volume.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A refrigerant cold storage type liquid cooling device, comprising a compressor refrigeration system, a refrigerant cold storage system, and a coolant supply system; the compressor refrigeration system comprises a compressor, a condenser, a throttling device, and a first evaporator, wherein the compressor outputs compressed refrigerant, the first evaporator has two groups of flow channels, and the medium flowing through the two groups of flow channels of the first evaporator is heat exchanged through the first evaporator, and the compressor, condenser, throttling device, and the first group of flow channels of the evaporator are connected by pipelines to form a first refrigerant circulation loop;

[0006] The refrigerant cold storage system comprises a cold storage liquid reservoir, a refrigerant pump, and a second evaporator, wherein the cold storage liquid reservoir stores refrigerant, the second evaporator has two groups of flow channels, the medium flowing through the two groups of flow channels of the second evaporator undergoes heat exchange through the second evaporator, and the cold storage liquid reservoir, the refrigerant pump, the first group of flow channels in the second evaporator, and the second group of flow channels in the first evaporator are connected through pipelines to form a second refrigerant circulation loop;

[0007] The coolant supply system comprises a water tank and a circulation pump, wherein the water tank stores coolant, and the water tank, the circulation pump, and the second group of flow channels in the second evaporator are connected to the heat load through pipelines to form a coolant circulation loop.

[0008] Furthermore, it also includes a control system, which is electrically connected to the compressor, the refrigerant pump, and the circulating pump.

[0009] Furthermore, the refrigerant cold storage system also includes a liquid level meter, a first flow sensor, and a first pressure sensor, wherein the liquid level meter is used to detect the refrigerant liquid level in the cold storage reservoir, the first flow sensor is used to detect the refrigerant flow output by the refrigerant pump, and the first pressure sensor is used to detect the refrigerant pressure output by the refrigerant pump, and the liquid level meter, the first flow sensor, and the first pressure sensor are respectively electrically connected to the control system for signal transmission.

[0010] Furthermore, the coolant supply system also includes a first temperature sensor, a second pressure sensor, a second temperature sensor, and a second flow sensor, wherein the first temperature sensor is used to detect the coolant temperature in the water tank, the second pressure sensor is used to detect the coolant pressure output by the circulating pump, the second temperature sensor is used to detect the coolant temperature output by the circulating pump, and the second flow sensor is used to detect the coolant flow rate returned to the water tank, and the first temperature sensor, the second pressure sensor, the second temperature sensor, and the second flow sensor are respectively electrically connected to the control system for signal transmission.

[0011] Furthermore, the refrigerant pump is a variable frequency pump.

[0012] Furthermore, the coolant supply system also includes a filter connected to the coolant circulation loop.

[0013] Furthermore, in the coolant supply system, the water tank is also equipped with an electric heater.

[0014] The utility model uses a compressor refrigeration system to cool the refrigerant in the refrigerant cold storage system during the load rest stage, and stores the cold energy in the cold storage reservoir. When the load is working, the refrigerant cold storage system releases the stored cold energy to the coolant supply system, and controls the heat exchange efficiency inside the evaporator 2 by adjusting the speed of the refrigerant pump, so as to achieve the purpose of stabilizing the supply temperature. After absorbing the heat of the heat load, the coolant supply system transfers the absorbed heat to the refrigerant cold storage system.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model uses refrigerant as a cold storage medium and utilizes the evaporation phase change heat absorption of the refrigerant for cooling. Its cold storage capacity is stronger than that of a single-phase cold storage medium (such as coolant). While ensuring that the cold storage capacity can meet the demand, the volume and weight of the liquid cooling equipment can be greatly reduced.

[0017] 2. The medium in contact with the load in the utility model is still the coolant, which can avoid the hidden danger of pressure resistance to the heat load caused by the increase of refrigerant pressure as the temperature increases during high-temperature storage.

[0018] 3. The temperature control of the utility model is achieved by controlling the speed of the refrigerant pump. The refrigerant pump adopts an adjustable speed pump. The change of its speed will bring about the change of the refrigerant flow rate, and finally realize the adjustment of the heat dissipation. At the same time, the speed regulation of the refrigerant pump can also reduce the pressure on the use of power supply and reduce the impact on the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural principle diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, this embodiment discloses a refrigerant cold storage type liquid cooling device, including a control system 19, a compressor refrigeration system, a refrigerant cold storage system, and a coolant supply system, wherein:

[0022] The compressor refrigeration system is a typical compressor refrigeration system, including a compressor 1, a condenser 2, a throttling device 3, and a first evaporator 4. The compressor 1 outputs the compressed first refrigerant 20, and the first evaporator has two groups of flow channels. The medium flowing through the two groups of flow channels of the first evaporator 4 undergoes heat exchange through the first evaporator 4. The refrigerant outlet of the compressor 1 is connected to the inlet of the condenser 2 through a pipeline, the outlet of the condenser 2 is connected to the inlet of the throttling device 3 through a pipeline, the outlet of the throttling device 3 is connected to the inlet of the first group of flow channels in the first evaporator 4 through a pipeline, and the outlet of the first group of flow channels in the first evaporator 4 is connected to the refrigerant inlet of the compressor 1 through a pipeline, thereby forming a circulation loop of the first refrigerant 20.

[0023] The refrigerant cold storage system includes a cold storage liquid reservoir 6, a refrigerant pump 7, and a second evaporator 10. The second refrigerant 21 is stored in the cold storage liquid reservoir 6, and the second evaporator 10 has two groups of flow channels. The medium flowing through the two groups of flow channels of the second evaporator 10 undergoes heat exchange through the second evaporator 10, and the refrigerant pump 7 adopts a variable frequency pump with adjustable speed. The outlet of the cold storage liquid reservoir 6 is connected to the inlet of the refrigerant pump 7 through a pipeline, and the outlet of the refrigerant pump 7 is connected to the inlet of the first group of flow channels in the second evaporator 10 through a pipeline, and the outlet of the first group of flow channels in the second evaporator 10 is connected to the inlet of the second group of flow channels of the first evaporator 4 in the compressor refrigeration system through a pipeline, and the outlet of the second group of flow channels of the first evaporator 4 in the compressor refrigeration system is connected to the inlet of the cold storage liquid reservoir 6 through a pipeline, thereby forming a circulation loop of the second refrigerant 21.

[0024] In the refrigerant cold storage system, a liquid level gauge 5 is installed on the cold storage liquid storage tank 6, and the liquid level gauge 5 is used to detect the liquid level of the second refrigerant in the cold storage liquid storage tank 6. A first flow sensor 8 and a first pressure sensor 9 are installed on the pipeline between the refrigerant pump 7 and the second evaporator 10, wherein the first flow sensor 8 is used to detect the refrigerant flow output by the refrigerant pump 7, and the first pressure sensor 9 is used to detect the refrigerant pressure output by the refrigerant pump 7.

[0025] The coolant supply system includes a water tank 11, a circulation pump 14, and a filter 15. The water tank 11 stores coolant 22, which is antifreeze. The water tank 11 is also equipped with an electric heater 12, which can heat the coolant 22 in the water tank. The outlet of the water tank 11 is connected to the inlet of the circulation pump 14 through a pipeline, and the outlet of the circulation pump 14 is connected to the inlet of the second group of flow channels of the second evaporator 10 in the refrigerant cold storage system through a pipeline. The outlet of the second group of flow channels of the second evaporator 10 in the refrigerant cold storage system is connected to the inlet of the filter 15 through a pipeline, and the outlet of the filter 15 is connected to the liquid supply joint of the heat load 23 through a pipeline, and the return joint of the heat load 23 is connected to the inlet of the water tank 11 through a pipeline, thereby forming a coolant circulation loop.

[0026] In the coolant supply system, the water tank 11 is installed with a first temperature sensor 13, which is used to detect the temperature of the coolant in the water tank. The pipeline between the filter 15 and the heat load 23 is installed with a second pressure sensor 16 and a second temperature sensor 17, wherein the second pressure sensor 16 is used to detect the pressure of the coolant 22 output by the circulating pump 14 to the heat load 23, and the second temperature sensor 17 is used to detect the temperature of the coolant 22 output by the circulating pump 14 to the heat load 23. The pipeline between the heat load 23 and the water tank 11 is installed with a second flow sensor 18, which is used to detect the flow rate of the coolant 22 returned from the heat load 23 to the water tank 11.

[0027] The control system 19 is electrically connected to the compressor 1 in the compressor refrigeration system, the refrigerant pump 7 in the refrigerant cold storage system, and the circulating pump 14 in the coolant supply system. The liquid level meter 5, the first flow sensor 8, the first pressure sensor 9 in the refrigerant cold storage system, and the first temperature sensor 13, the second pressure sensor 16, the second temperature sensor 17, and the second flow sensor 18 in the coolant supply system are electrically connected to the control system 19 for signal transmission.

[0028] The specific working process of this embodiment is as follows.

[0029] 1. Cold storage process:

[0030] After the compressor 1 is started, it absorbs the vapor of the first refrigerant 20 and compresses it into a high-temperature and high-pressure gas, enters the condenser 2 to complete condensation and heat release, and becomes a medium-temperature and high-pressure liquid refrigerant with a certain degree of supercooling. The medium-temperature and high-pressure liquid refrigerant enters the throttling device 3 under the action of the pressure difference, and the throttling and pressure reduction effect of the throttling device 3 turns the refrigerant into a low-temperature and low-pressure gas-liquid mixture and enters the first group of flow channels of the first evaporator 4. The second refrigerant 21 of the refrigerant cold storage system enters the second group of flow channels of the first evaporator 4 under the power of the refrigerant pump 7, and exchanges heat with the first refrigerant 20 of the compressor refrigeration system through the first evaporator 4. As a result, the first refrigerant 20 of the compressor refrigeration system absorbs heat and vaporizes and returns to the compressor 1, completing the refrigeration cycle. The second refrigerant 21 of the refrigerant cold storage system dissipates heat and condenses, and is stored in the cold storage liquid reservoir 6. The cold storage completion degree is judged according to the pressure 9 of the refrigerant cold storage system.

[0031] 2. Cooling process:

[0032] After the circulation pump 14 is turned on, the coolant 22 in the water tank 11 is sucked in, and the coolant 22 enters the second group of flow channels of the second evaporator 10. At the same time, the second refrigerant 21 of the refrigerant cold storage system enters the first group of flow channels of the second evaporator 10, so that the coolant 22 and the second refrigerant 21 exchange heat through the second evaporator 10. After the heat dissipation temperature of the coolant 22 is reduced, it is transported to the heat load 23 through the filter 15. The coolant 22 at the outlet of the heat load 23 returns to the water tank 11 through the pipeline, and the circulation is realized in this way. The second refrigerant 21 of the refrigerant cold storage system absorbs the heat of the coolant 22 in the second evaporator 10 and then vaporizes and returns to the cold storage reservoir 6.

[0033] The volume of the cold storage liquid reservoir 6 is determined according to the heat dissipation of the heat load 23 to ensure that there is enough refrigerant 21 in the cold storage liquid reservoir 6 for heat dissipation during the operation of the heat load 23.

[0034] The heat exchange efficiency inside the second evaporator 10 is controlled by adjusting the rotation speed of the refrigerant pump 7 , thereby achieving the purpose of stabilizing the liquid supply temperature 17 .

[0035] 3. Low temperature preheating stage

[0036] At low temperatures, the circulation pump 14 and the electric heater 12 are first turned on to increase the temperature of the coolant 22 to meet the temperature requirements of the heat load 23 when starting at low temperatures, and then the above-mentioned cold storage process and cooling process are carried out.

[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. Such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0038] The present invention is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A refrigerant cold storage type liquid cooling device, characterized in that: It includes a compressor refrigeration system, a refrigerant cold storage system, and a coolant supply system; the compressor refrigeration system includes a compressor, a condenser, a throttling device, and a first evaporator, wherein the compressor outputs compressed refrigerant, the first evaporator has two groups of flow channels, and the medium flowing through the two groups of flow channels of the first evaporator is heat exchanged through the first evaporator, and the compressor, condenser, throttling device, and the first group of flow channels of the evaporator are connected by pipelines to form a first refrigerant circulation loop; The refrigerant cold storage system comprises a cold storage liquid reservoir, a refrigerant pump, and a second evaporator, wherein the cold storage liquid reservoir stores refrigerant, the second evaporator has two groups of flow channels, the medium flowing through the two groups of flow channels of the second evaporator undergoes heat exchange through the second evaporator, and the cold storage liquid reservoir, the refrigerant pump, the first group of flow channels in the second evaporator, and the second group of flow channels in the first evaporator are connected through pipelines to form a second refrigerant circulation loop; The coolant supply system comprises a water tank and a circulation pump, wherein the water tank stores coolant, and the water tank, the circulation pump, and the second group of flow channels in the second evaporator are connected to the heat load through pipelines to form a coolant circulation loop.

2. A refrigerant cold storage type liquid cooling device according to claim 1, characterized in that: It also includes a control system, which is electrically connected to the compressor, the refrigerant pump, and the circulating pump.

3. A refrigerant cold storage type liquid cooling device according to claim 2, characterized in that: The refrigerant cold storage system also includes a liquid level meter, a first flow sensor, and a first pressure sensor, wherein the liquid level meter is used to detect the refrigerant liquid level in the cold storage reservoir, the first flow sensor is used to detect the refrigerant flow output by the refrigerant pump, and the first pressure sensor is used to detect the refrigerant pressure output by the refrigerant pump. The liquid level meter, the first flow sensor, and the first pressure sensor are respectively electrically connected to the control system for signal transmission.

4. A refrigerant cold storage type liquid cooling device according to claim 2, characterized in that: The coolant supply system also includes a first temperature sensor, a second pressure sensor, a second temperature sensor, and a second flow sensor, wherein the first temperature sensor is used to detect the coolant temperature in the water tank, the second pressure sensor is used to detect the coolant pressure output by the circulating pump, the second temperature sensor is used to detect the coolant temperature output by the circulating pump, and the second flow sensor is used to detect the coolant flow rate returned to the water tank. The first temperature sensor, the second pressure sensor, the second temperature sensor, and the second flow sensor are respectively electrically connected to the control system for signal transmission.

5. A refrigerant cold storage type liquid cooling device according to any one of claims 1 to 4, characterized in that: The refrigerant pump is a variable frequency pump.

6. A refrigerant cold storage type liquid cooling device according to any one of claims 1 to 4, characterized in that: The coolant supply system also includes a filter connected to the coolant circulation loop.

7. A refrigerant cold storage type liquid cooling device according to any one of claims 1 to 4, characterized in that: In the coolant supply system, the water tank is also equipped with an electric heater.

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