阅读说明：本技术 一种压缩驱动型两相间接冷却系统 (Compression driving type two-phase indirect cooling system ) 是由 董永申 魏志鹏 王长宁 黄胜利 孙党飞 于 2019-11-27 设计创作，主要内容包括：本发明涉及一种压缩驱动型两相间接冷却系统,其特征在于包括通过管道首尾依次相连的冷板蒸发器、气液分离器、压缩机、冷凝器和热力膨胀阀,所述冷板蒸发器与发热器件接触并对发热器件进行冷却,冷凝器和热力膨胀阀之间的管道上设有电磁阀,冷凝器和电磁阀之间的管道上设有相连通的储液器及干燥过滤器。借由上述技术方案,本发明相比于常规单相冷板式液冷系统,制冷剂在冷板内发生相变,换热系数高,热流密度大,均温性好,且介质不导电,安全性高；相比于泵驱两相间接冷却系统,本发明中制冷剂能够实现比高压侧的空气或液体温度低的蒸发温度。(The invention relates to a compression driving type two-phase indirect cooling system which is characterized by comprising a cold plate evaporator, a gas-liquid separator, a compressor, a condenser and a thermostatic expansion valve which are sequentially connected end to end through a pipeline, wherein the cold plate evaporator is in contact with a heating device and cools the heating device, an electromagnetic valve is arranged on the pipeline between the condenser and the thermostatic expansion valve, and a liquid storage device and a drying filter which are communicated are arranged on the pipeline between the condenser and the electromagnetic valve. Compared with the conventional single-phase cold plate type liquid cooling system, the refrigerant has the advantages that phase change occurs in the cold plate, the heat exchange coefficient is high, the heat flow density is high, the temperature uniformity is good, the medium is non-conductive, and the safety is high; in contrast to pump-driven two-phase indirect cooling systems, the refrigerant of the present invention is capable of achieving a lower evaporation temperature than the air or liquid temperature of the high pressure side.)

1. The compression driving type two-phase indirect cooling system is characterized by comprising a cold plate evaporator, a gas-liquid separator, a compressor, a condenser and a thermal expansion valve which are sequentially connected end to end through pipelines, wherein the cold plate evaporator is in contact with a heating device and cools the heating device.

2. The compression driving type two-phase indirect cooling system according to claim 1, wherein: and an electromagnetic valve is arranged on a pipeline between the condenser and the thermostatic expansion valve.

3. The compression driving type two-phase indirect cooling system according to claim 2, wherein: and a liquid storage device and a drying filter which are communicated are arranged on the pipeline between the condenser and the electromagnetic valve.

4. The compression driving type two-phase indirect cooling system according to claim 1, wherein: and a pressure sensor for monitoring condensation pressure is arranged on an outlet pipeline of the condenser.

5. The compression driving type two-phase indirect cooling system according to any one of claims 1 to 4, wherein: the inlet pipeline of the compressor is provided with a low-voltage switch, and the outlet pipeline of the compressor is provided with a high-voltage switch.

Technical Field

The invention belongs to the technical field of cooling systems, and particularly relates to a compression driving type two-phase indirect cooling system.

Background

The indirect cooling system is also called as a cold plate type liquid cooling system, and the main forms at present are a conventional single-phase cold plate type liquid cooling system and a pump-driven two-phase indirect cooling system. The conventional single-phase cold plate type liquid cooling system takes antifreeze liquid, deionized water and the like as cooling media, the cold plate is in contact with a heating load, the cooling media absorb heat generated by the heating load in the cold plate, the heat is boosted by a circulating pump and then enters a heat exchanger for cooling, external media for realizing heat exchange of the heat exchanger can be liquid and air, the cooled media enter the cold plate again after parts such as water quality treatment, parameter monitoring and the like, and the circulation is carried out.

The pump-driven two-phase indirect cooling system takes fluorinated liquid, conventional refrigerant and the like as cooling media, the liquid cooling media partially change phase in a cold plate, absorb heat generated by a heating load and then enter a condenser to be condensed into liquid, wherein the condenser is positioned in liquid and air to realize the condensation effect of the cooling media, and the cooled media enter the cold plate again after passing through a water quality treatment and parameter monitoring part, and the process is circulated.

Disclosure of Invention

In order to solve the technical problems, the invention provides a compression-driven two-phase indirect cooling system which is high in heat exchange coefficient, high in heat flux density, good in temperature uniformity, non-conductive in medium and high in safety.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The compression driving type two-phase indirect cooling system provided by the invention comprises a cold plate evaporator, a gas-liquid separator, a compressor, a condenser and a thermal expansion valve which are sequentially connected end to end through a pipeline, wherein the cold plate evaporator is in contact with a heating device and cools the heating device.

The object of the invention is further achieved by the following technical measures.

In the compression-driven two-phase indirect cooling system, the solenoid valve is provided in the pipe between the condenser and the thermostatic expansion valve.

In the compression driving type two-phase indirect cooling system, the liquid reservoir and the dry filter which are communicated with each other are arranged on the pipeline between the condenser and the electromagnetic valve.

In the compression driving type two-phase indirect cooling system, the outlet pipeline of the condenser is provided with a pressure sensor for monitoring the condensing pressure.

In the compression-driven two-phase indirect cooling system, the inlet pipeline of the compressor is provided with a low-pressure switch, and the outlet pipeline of the compressor is provided with a high-pressure switch.

By means of the technical scheme, compared with the prior art, the invention at least has the following beneficial effects:

(1) compared with a conventional single-phase cold plate type liquid cooling system, the refrigerant in the invention has phase change in the cold plate, high heat exchange coefficient, high heat flow density, good temperature uniformity, non-conductive medium and high safety; meanwhile, the refrigerant directly absorbs heat generated by the heating load through the cold plate evaporator, and the thermal resistance of the refrigerant in the link from the refrigerant to the antifreeze and then to the heating load is reduced.

(2) Compared with a pump-driven two-phase indirect cooling system, the refrigerant in the compression-driven two-phase indirect cooling system can achieve an evaporation temperature lower than the air or liquid temperature at the high-pressure side of the condenser.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1, the compression-driven two-phase indirect cooling system of the present invention uses a conventional refrigerant as a cooling medium, and includes a cold plate evaporator 1, a gas-liquid separator 2, a compressor 3, a condenser 4, and a thermal expansion valve 5, which are sequentially connected end to end through a pipeline, wherein the cold plate evaporator 1 contacts with a heat generating device 6 and cools the heat generating device 6.

Preferably, an electromagnetic valve 7 is arranged on a pipeline between the condenser 4 and the thermostatic expansion valve 5; the solenoid valve 7 needs to be closed when the whole cooling system is shut down to prevent high-pressure liquid from entering the low-pressure side, because the solenoid valve 7 is positioned on a pipeline between the condenser and the thermostatic expansion valve (namely, positioned on the high-pressure side), a high-pressure liquid refrigerant is positioned in the pipeline, and the solenoid valve can prevent the high-pressure liquid refrigerant from flowing to the low-pressure side in a shutdown state, so that the damage to the cooling system caused by the liquid entering the compressor in the startup process is further avoided.

In this embodiment, a pipeline between the condenser 4 and the electromagnetic valve 7 is provided with a liquid reservoir 8 and a dry filter 9 which are connected, an inlet of the liquid reservoir 8 is connected with an outlet of the condenser 4, an outlet of the liquid reservoir 8 is connected with an inlet of the thermostatic expansion valve through the dry filter 9, the liquid reservoir is used for storing a cooling medium flowing out of the outlet of the condenser, and the dry filter can filter the cooling medium, so that dirt is prevented from entering the cold plate evaporator 1; the bulb 51 of the thermostatic expansion valve 5 is arranged at the outlet of the cold plate evaporator and is used for accurately sensing the suction temperature of the compressor 3.

In this embodiment, the outlet pipeline of the condenser 4 is provided with a pressure sensor 10 for monitoring the condensing pressure, and the condenser further comprises a condensing fan 41, and the condensing pressure is regulated and controlled by a condensing fan frequency conversion PID; and the temperature control of the cold plate evaporator can be realized by adjusting the surface temperature of the cold plate through the frequency conversion (or thermal expansion valve) PID of the compressor. The inlet pipeline of the compressor 3 is provided with a low-pressure switch 31, the outlet pipeline is provided with a high-pressure switch 32, the compressor is mainly protected, when the suction pressure of the compressor is too low or the outlet pressure of the compressor is too high, the compressor stops running to prevent system damage. In addition, needle valves 11 are arranged on the pipelines between the gas-liquid separator and the cold plate evaporator and between the condenser and the liquid accumulator, and the needle valves 11 play a role in supplementing refrigerants or vacuumizing a cooling system and the like.

The working principle of the invention is as follows:

the inlet of the compressor 3 sucks in low-pressure gaseous refrigerant, the low-pressure gaseous refrigerant is compressed in the compressor 3, the temperature is increased, and high-temperature and high-pressure gaseous refrigerant is formed and enters the high-pressure side of the circulating pipeline; the high-temperature high-pressure gaseous refrigerant discharged from the outlet of the compressor 3 passes through the condenser 4 and becomes a high-temperature high-pressure liquid refrigerant, but the temperature of the liquid refrigerant is lower than that of the high-temperature high-pressure gaseous refrigerant discharged from the outlet of the compressor. Then, after passing through the liquid accumulator 8, the drying filter 9 and the electromagnetic valve 7, the high-temperature and high-pressure liquid refrigerant enters the thermostatic expansion valve 5 for throttling and is sprayed into the cold plate evaporator 1 (low-pressure side), the pressure is reduced to become a low-temperature and low-pressure two-phase refrigerant (namely, gas state and liquid state), the low-temperature and low-pressure two-phase refrigerant is evaporated after absorbing the heat of the heating device 6 in the cold plate evaporator 1 to become a low-temperature and low-pressure gas refrigerant, the heating device is cooled in the process, and then the gas refrigerant flows out from the outlet of the cold plate evaporator 1 and enters the gas-; the gas-liquid separator 2 is used for recovering liquid refrigerant in the cold plate evaporator under the condition that the two-phase refrigerant in the cold plate evaporator is incompletely evaporated, so that the cooling medium entering the compressor is ensured to be in a gas state, and the normal operation of the compressor is protected. And finally, the low-pressure gaseous refrigerant flowing out of the gas-liquid separator 2 enters the compressor 3 to be compressed and then changed into the high-temperature high-pressure gaseous refrigerant, and the circulation cooling of the heating device is realized. It should be noted that, in the cooling operation, the evaporation pressure of the refrigerant is reduced by a throttling device such as a thermostatic expansion valve, and the saturation temperature is reduced, so that the technical effect of low-temperature evaporation can be achieved. After the low-temperature low-pressure gaseous refrigerant is boosted by the compressor, the saturation temperature is increased, and the heat in the system is transferred to the high-pressure side where the condenser with the temperature higher than the evaporation temperature is located. The cold plate evaporator adopts a micro-channel cold plate, the refrigerant is directly evaporated in the cold plate evaporator to adapt to the efficient heat exchange of the phase change of the refrigerant, and the filtering effect of the drying filter on the refrigerant is also adapted to the long-time normal operation of the cold plate with the micro-channel structure without blockage.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art can make any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the present invention without departing from the scope of the present invention, and still fall within the scope of the present invention.