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CN-121977300-A - Two-phase flow composite heat exchange circulating device

CN121977300ACN 121977300 ACN121977300 ACN 121977300ACN-121977300-A

Abstract

The invention discloses a two-phase flow composite heat exchange circulating device which comprises a fluorine pump, an intermediate heat exchanger, a liquid storage device, a compressor, a throttling element, a two-phase heat exchanger and a condenser, wherein a refrigerant output by the compressor sequentially flows through the condenser, the throttling element and a first flow passage of the intermediate heat exchanger and then returns to the compressor to form a compressor refrigeration cycle, a cooling medium in the liquid storage device is output to a heat load through the fluorine pump and then is output to the two-phase heat exchanger through a first cooling medium output passage of the heat load, the cooling medium returns to the liquid storage device through the two-phase heat exchanger to form an external circulation of the fluorine pump, the cooling medium in the liquid storage device is output to the heat load through the fluorine pump and then is output to a second flow passage of the intermediate heat exchanger through a second cooling medium output passage of the heat load, and the cooling medium returns to the liquid storage device through the second flow passage of the intermediate heat exchanger to form an internal circulation of the fluorine pump. The invention utilizes the inner and outer circulation of the fluorine pump and the refrigeration circulation of the compressor, and can meet the requirement of high-efficiency heat exchange under all working conditions.

Inventors

  • WANG WEI
  • LEI JUAN

Assignees

  • 合肥天鹅制冷科技有限公司

Dates

Publication Date
20260505
Application Date
20251106

Claims (7)

  1. 1. The two-phase flow composite heat exchange circulating device is characterized by comprising a fluorine pump (1), an intermediate heat exchanger (5), a liquid reservoir (8), a compressor (9), a throttling element (10), a two-phase heat exchanger (6.1) and a condenser (6.2), wherein two flow passages are formed in the intermediate heat exchanger (5), and the two-phase heat exchanger (6.1) and the condenser (6.2) share the same fan (7); The outlet end of the compressor (9) is connected with the inlet end of the condenser (6.2) through a pipeline, the outlet end of the condenser (6.2) is connected with the inlet end of the throttling element (10) through a pipeline, the outlet end of the throttling element (10) is connected with one end of a first flow passage of the intermediate heat exchanger (5) through a pipeline, the other end of the first flow passage of the intermediate heat exchanger (5) is connected with the return port end of the compressor (9) through a pipeline, and the refrigerant output by the compressor (9) sequentially flows through the condenser (6.2), the throttling element (10) and the first flow passage of the intermediate heat exchanger (5) and then returns to the compressor (9), so that a compressor refrigeration cycle is formed; The heat pump comprises a heat pump (1), a heat load (3), a two-phase heat exchanger (6.1), a heat pump (5) and a heat pump (3), wherein a cooling medium is arranged in the heat pump (8), the cooling medium is the same as a refrigerant output by a compressor (9), the outlet end of the heat pump (8) is connected with the inlet end of the heat pump (1) through a pipeline, the outlet end of the heat pump (1) is connected with the inlet end of the heat load (3) through a pipeline, the first-path cooling medium output path of the heat load (3) is connected with the inlet end of the two-phase heat exchanger (6.1), the outlet end of the two-phase heat exchanger (6.1) is connected with one inlet end of the heat pump (8) through a pipeline, the second-path cooling medium output path of the heat load (3) is connected with one end of a second flow path of the intermediate heat exchanger (5), and the other end of the second flow path of the intermediate heat exchanger (5) is connected with the other inlet end of the heat pump through a pipeline; The cooling medium in the liquid reservoir (8) is output to the heat load (3) through the fluorine pump (1), and then is output to the two-phase heat exchanger (6.1) through a first path of cooling medium output path of the heat load (3), and the cooling medium returns to the liquid reservoir (8) after passing through the two-phase heat exchanger (6.1), so that the external circulation of the fluorine pump is formed; The cooling medium in the liquid reservoir (8) is output to the heat load (3) through the fluorine pump (1), and is output to the second flow passage of the intermediate heat exchanger (5) through the second path cooling medium output path of the heat load (3), and the cooling medium returns to the liquid reservoir (8) after passing through the second flow passage of the intermediate heat exchanger (5), thereby forming the internal circulation of the fluorine pump.
  2. 2. The two-phase flow composite heat exchange circulating device according to claim 1, wherein the two-phase heat exchanger (6.1) and the condenser (6.2) are fin tube type heat exchangers, plate fin type heat exchangers or micro-channel heat exchangers.
  3. 3. A two-phase flow composite heat exchange circulation device according to claim 1, characterized in that the intermediate heat exchanger (5) is a plate heat exchanger or a double pipe heat exchanger.
  4. 4. The two-phase flow composite heat exchange circulating device according to claim 1, wherein the heat load (3) realizes two paths of cooling medium output paths through two electromagnetic valves respectively.
  5. 5. The two-phase flow composite heat exchange circulating device according to claim 1, wherein the heat load (3) realizes two paths of cooling medium output paths through an electric three-way valve.
  6. 6. The two-phase flow composite heat exchange circulating device according to claim 1, wherein the fan (7) adopts a speed-regulating fan.
  7. 7. The two-phase flow composite heat exchange circulating device is characterized by comprising a fluorine pump (1), an intermediate heat exchanger (5), a liquid reservoir (8), a compressor (9), a throttling element (10) and a two-phase heat exchanger (6.1), wherein two flow passages are formed in the intermediate heat exchanger (5), and the two-phase heat exchanger (6.1) and a condenser (6.2) share the same fan (7); The outlet end of the compressor (9) is connected with the inlet end of the two-phase heat exchanger (6.1) through a pipeline, the outlet end of the two-phase heat exchanger (6.1) is connected with the inlet end of the throttling element (10) through a pipeline, the outlet end of the throttling element (10) is connected with one end of a first flow passage of the intermediate heat exchanger (5) through a pipeline, the other end of the first flow passage of the intermediate heat exchanger (5) is connected with the return port end of the compressor (9) through a pipeline, and the refrigerant output by the compressor (9) sequentially flows through the two-phase heat exchanger (6.1), the throttling element (10) and the first flow passage of the intermediate heat exchanger (5) and then returns to the compressor (9), so that a compressor refrigeration cycle is formed; The heat pump comprises a heat pump (1), a compressor (9), a heat load (3), a heat pump (6.1) and a throttling element (10), wherein a cooling medium is arranged in the heat pump (8), the cooling medium is the same with the refrigerant output by the compressor (9), the outlet end of the heat pump (8) is connected with the inlet end of the heat pump (1) through a pipeline, the outlet end of the heat pump (1) is connected with the inlet end of the heat load (3) through a pipeline; The cooling medium in the liquid reservoir (8) is output to the heat load (3) through the fluorine pump (1), then is output to the two-phase heat exchanger (6.1) through a first path of cooling medium output path of the heat load (3), and is returned to the liquid reservoir (8) through the electromagnetic valve (11) after passing through the two-phase heat exchanger (6.1), so that the external circulation of the fluorine pump is formed; The cooling medium in the liquid reservoir (8) is output to the heat load (3) through the fluorine pump (1), and is output to the second flow passage of the intermediate heat exchanger (5) through the second path cooling medium output path of the heat load (3), and the cooling medium returns to the liquid reservoir (8) after passing through the second flow passage of the intermediate heat exchanger (5), thereby forming the internal circulation of the fluorine pump.

Description

Two-phase flow composite heat exchange circulating device Technical Field The invention relates to the field of two-phase flow composite heat exchange, in particular to a two-phase flow composite heat exchange circulating device. Background With the wide application of high-performance electronic devices and the continuous improvement of requirements of people on energy efficiency and miniaturization, the cooling technology of the electronic devices is rapidly developed, and the electronic devices mainly adopt a cooling mode at present: a) Natural cooling Natural cooling is a single effect of heat conduction, natural convection and radiation or a combination of two or more heat exchange forms, and is only suitable for occasions with lower heat flux density due to smaller heat dissipation capacity. B) Forced air cooling Forced air cooling is a mode of using means such as externally added fans to enable air to generate convection to cool objects, and is commonly used for heat dissipation of medium and small power electronic equipment. C) Forced liquid cooling The cooling liquid is conveyed to the cooled object in a liquid form to perform forced heat exchange by using a cooling liquid forced heat exchange mode, a vapor compression refrigeration mode or a composite other refrigeration technology, and the cooling liquid does not undergo phase change in the process, so that the heat pipe requirement of the heat flow density of 1.5W/cm < 2 > -50W/cm < 2 > of the main stream of the current market can be met. D) Phase change refrigeration The liquid gasification, solid melting and sublimation are utilized to absorb heat to the cooled object to realize refrigeration. If the liquid has fluidity, the conditions of temperature, air pressure, flow rate and the like are controlled, so that the liquid is rapidly vaporized and absorbed under low pressure, and the heat transmission limit of more than 50W/cm < 2 > of heat flow density is realized, which is an important development direction in the future. As one of the phase-change refrigeration technologies, the two-phase flow heat exchange technology can quickly and effectively carry away the high-density heat in the electronic equipment, and is more and more paid attention to, but each new technology development is always accompanied with the solution and innovation of some technical difficulties. As is known, a phase-changeable cooling medium undergoes a liquid or gaseous phase change under certain pressure and temperature conditions, while displacing a significant amount of energy. In the prior art, R134a is adopted as a cooling medium in the simplest two-phase flow circulating system constructed by a fluorine pump, a load and an external heat exchanger, under the condition of 50 ℃ in summer, as the phase transition temperature of the external heat exchanger is higher than the ambient temperature, if 65 ℃ is adopted, the absolute pressure is 1.89MPa, which means that the pressure of a load end is equivalent, compared with the prior art, the forced liquid cooling pressure (such as 0.6-0.8 MPa) of cooling liquid is increased by 2.4-3.2 times, the pressure is higher along with the higher temperature, the original pressure-resistant design is required for the load end (such as a cold plate), in addition, even if the pressure is not considered, the liquid cooling medium at the inlet of the fluorine pump needs to have a certain supercooling degree, the cooling capacity sent to the load end is larger along with the larger supercooling degree, and the generation of air resistance is reduced. Therefore, if a scheme can solve the problem of low-pressure phase-change refrigeration at high temperature or increase the supercooling degree, the method also provides a choice for two-phase flow development application. Disclosure of Invention The invention provides a two-phase flow composite heat exchange circulating device, which aims to solve the problem of how to realize low-pressure phase change refrigeration at high temperature or increase supercooling degree so as to realize high-density heat exchange of two-phase flow. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the two-phase flow composite heat exchange circulation device comprises a fluorine pump (1), an intermediate heat exchanger (5), a liquid storage device (8), a compressor (9), a throttling element (10), a two-phase heat exchanger (6.1) and a condenser (6.2), wherein two flow passages are formed in the intermediate heat exchanger (5), and the two-phase heat exchanger (6.1) and the condenser (6.2) share the same fan (7); The outlet end of the compressor (9) is connected with the inlet end of the condenser (6.2) through a pipeline, the outlet end of the condenser (6.2) is connected with the inlet end of the throttling element (10) through a pipeline, the outlet end of the throttling element (10) is connected with one end of a first flow passage of the intermediate heat e