CN110822961B - Two-phase fluid cooling system - Google Patents
Two-phase fluid cooling system Download PDFInfo
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- CN110822961B CN110822961B CN201911175955.XA CN201911175955A CN110822961B CN 110822961 B CN110822961 B CN 110822961B CN 201911175955 A CN201911175955 A CN 201911175955A CN 110822961 B CN110822961 B CN 110822961B
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- Prior art keywords
- working medium
- valve
- circulating working
- evaporator
- controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/025—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes having non-capillary condensate return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/06—Control arrangements therefor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20936—Liquid coolant with phase change
Abstract
The present application relates to a two-phase fluid cooling system comprising: an evaporator; a liquid storage tank; the movable partition plate divides the interior of the liquid storage tank into a circulating working medium cavity and an air cavity; wherein, the outlet of the circulating working medium cavity is communicated with the inlet of the evaporator through a circulating working medium liquid supply pipeline, and the inlet of the circulating working medium cavity is communicated with the outlet of the evaporator through a circulating working medium liquid return pipeline; the inlet of the air cavity is communicated with a pressure air source through a pressure air inlet pipeline, and the outlet of the air cavity is communicated with the outside through a pressure air outlet pipeline, so that the pressure of the circulating working medium cavity can be adjusted, and the cooling working medium in the circulating working medium cavity is in a liquid-phase supercooled state; the pump is arranged on the circulating working medium liquid supply pipeline; the condenser is arranged on the circulating working medium liquid return pipeline to cool the cooling working medium flowing through the circulating working medium liquid return pipeline; the first valve is arranged on the circulating working medium liquid supply pipeline and positioned between the pump and the evaporator, and the opening degree of the first valve can be adjusted to control the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator to be in a gas-liquid two-phase state.
Description
Technical Field
The application belongs to the technical field of two-phase fluid cooling system design, and particularly relates to a two-phase fluid cooling system.
Background
At present, for the heat dissipation of high-power and high-power-density equipment, the simple air cooling and liquid cooling equipment cannot meet the cooling requirement, and the heating power and the cooling condition of the equipment are in the dynamic change process in the operation process of the actual equipment, so that the prior art cannot well adapt to the dynamic change for the heat dissipation of the equipment.
The present application is made in view of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present application to provide a two-phase fluid cooling system that overcomes or alleviates at least one of the disadvantages of the prior art.
The technical scheme of the application is as follows:
a two-phase fluid cooling system comprising:
an evaporator;
a liquid storage tank;
the movable partition plate is arranged in the liquid storage tank to divide the interior of the liquid storage tank into a circulating working medium cavity and an air cavity; wherein, the outlet of the circulating working medium cavity is communicated with the inlet of the evaporator through a circulating working medium liquid supply pipeline, and the inlet of the circulating working medium cavity is communicated with the outlet of the evaporator through a circulating working medium liquid return pipeline; the inlet of the air cavity is communicated with a pressure air source through a pressure air inlet pipeline, and the outlet of the air cavity is communicated with the outside through a pressure air outlet pipeline, so that the pressure in the air cavity can be adjusted, the movable partition plate can be driven to move, the volume of the circulating working medium cavity is changed, the pressure of the circulating working medium cavity is changed, and the cooling working medium in the circulating working medium cavity is ensured to be in a liquid-phase supercooled state;
the pump is arranged on the circulating working medium liquid supply pipeline;
the condenser is arranged on the circulating working medium liquid return pipeline to cool the cooling working medium flowing through the circulating working medium liquid return pipeline;
the first valve is arranged on the circulating working medium liquid supply pipeline and positioned between the pump and the evaporator, and the opening degree of the first valve can be adjusted to control the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator to be in a gas-liquid two-phase state.
According to at least one embodiment of the present application, further comprising:
and the elastic component is arranged in the air cavity and is connected with the movable partition plate and the liquid storage tank.
According to at least one embodiment of the present application, further comprising:
the first temperature sensor is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator and the condenser;
the first pressure sensor is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator and the condenser;
the controller is electrically connected with the first valve, the first temperature sensor and the first pressure sensor, judges whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a gas-phase overheat state or not according to the temperature signal of the first temperature sensor and the pressure signal of the first pressure sensor, and adjusts the opening degree of the first valve to be increased if the cooling working medium is in the gas-phase overheat state; and judging whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a liquid phase supercooling state, and if so, adjusting to reduce the opening degree of the first valve.
According to at least one embodiment of the present application, the controller is electrically connected to the pump, and if the cooling medium flowing from the evaporator into the circulating medium return pipeline is in a gas-phase overheat state and the first valve is fully opened, the pump is adjusted to increase the flow rate of the circulating medium in the circulating medium supply pipeline; and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a liquid phase supercooling state and the opening degree of the first valve is smaller than a set value, adjusting the pump to reduce the flow of the cooling working medium in the circulating working medium liquid supply pipeline.
According to at least one embodiment of the present application, further comprising:
the eighth valve is arranged on the pressure gas inlet pipeline and is electrically connected with the controller;
the ninth valve is arranged on the pressure gas outlet pipeline and is electrically connected with the controller;
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a gas-phase overheat state and the first valve is fully opened, the controller adjusts to increase the opening degree of the eighth valve and adjusts to decrease the opening degree of the ninth valve; and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a liquid phase supercooling state and the opening degree of the first valve is smaller than a set value, the controller adjusts to reduce the opening degree of the eighth valve and increases the opening degree of the ninth valve.
According to at least one embodiment of the present application, further comprising:
the sixth temperature sensor is used for detecting the temperature of the circulating working medium cavity and is electrically connected with the controller;
the fourth pressure sensor is used for detecting the pressure of the circulating working medium cavity and is electrically connected with the controller;
and the controller judges whether the cooling working medium in the circulating working medium cavity is in a liquid phase supercooling state or not according to the temperature signal of the sixth temperature sensor and the pressure signal of the fourth pressure sensor, and if not, the controller adjusts the opening degree of the eighth valve to be increased and adjusts the opening degree of the ninth valve to be decreased.
According to at least one embodiment of the present application, further comprising:
and the vacuum pump is arranged on the pressure gas outlet pipeline.
According to at least one embodiment of the present application, further comprising:
the inlet end of the first cold source channel is communicated with the first cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser, the inlet end of the first cold source channel is provided with a fourth valve, and the outlet end of the first cold source channel is provided with a fifth valve;
the inlet end of the second cold source channel is communicated with a second cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser, the inlet end of the second cold source channel is provided with a sixth valve, and the outlet end of the second cold source channel is provided with a seventh valve;
the controller is electrically connected with the fourth valve, the fifth valve, the sixth valve and the seventh valve and is provided with:
the first control state controls the fourth valve and the fifth valve to be opened and controls the sixth valve and the seventh valve to be closed;
and in the second control state, the fourth valve and the fifth valve are controlled to be closed, and the sixth valve and the seventh valve are controlled to be opened.
According to at least one embodiment of the present application, further comprising:
the fourth temperature sensor is arranged at the inlet end of the first cold source channel and is electrically connected with the controller;
the fifth temperature sensor is arranged at the inlet end of the second cold source channel and is electrically connected with the controller;
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a gas-phase overheating state and the first valve is fully opened, the controller compares whether the temperature signal of the fourth temperature sensor is smaller than the temperature signal of the fifth temperature sensor, if so, the controller is in a first control state, and otherwise, the controller is in a second control state.
According to at least one embodiment of the present application, the controller further has:
in a third control state, the fourth valve and the fifth valve are controlled to be opened, and the sixth valve and the seventh valve are controlled to be opened;
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator is in a gas-phase overheating state and the first valve is fully opened, the controller is in a third control state.
According to at least one embodiment of the present application, the source of pressurized air comprises aircraft engine bleed air.
Drawings
FIG. 1 is a schematic diagram of a two-fluid cooling system according to an embodiment of the present application;
wherein:
1-an evaporator; 2-a first parallel evaporator; 3-a second parallel evaporator; 4-a condenser; 5-a liquid storage tank; 6-a pump; 7-a first temperature sensor; 8-a first pressure sensor; 9-a second temperature sensor; 10-a second pressure sensor; 11-a third temperature sensor; 12-a third pressure sensor; 13-a first valve; 14-a second valve; 15-a third valve; 16-a fourth temperature sensor; 17-a fourth valve; 18-a fifth valve; 19-a fifth temperature sensor; 20-a sixth valve; 21-a seventh valve; 22-a sixth temperature sensor; 23-a fourth pressure sensor; 24-a seventh temperature sensor; 25-a fifth pressure sensor; 26-an eighth valve; 27-a ninth valve; 28-vacuum pump; 29-a controller; 30-a movable partition plate; 31-elastic component.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
The present application is described in further detail below with reference to fig. 1.
A two-phase fluid cooling system comprising:
an evaporator 1;
a liquid storage tank 5;
a movable partition plate 30 arranged inside the liquid storage tank 5 to divide the inside of the liquid storage tank 5 into a circulating working medium cavity and an air cavity; wherein, the outlet of the circulating working medium cavity is communicated with the inlet of the evaporator 1 through a circulating working medium liquid supply pipeline, and the inlet of the circulating working medium cavity is communicated with the outlet of the evaporator 1 through a circulating working medium liquid return pipeline; the inlet of the air cavity is communicated with a pressure air source through a pressure air inlet pipeline, and the outlet of the air cavity is communicated with the outside through a pressure air outlet pipeline, so that the pressure in the air cavity can be adjusted, the movable partition plate 30 can be driven to move, the volume of the circulating working medium cavity is changed, the pressure of the circulating working medium cavity is changed, and the cooling working medium in the circulating working medium cavity is ensured to be in a liquid-phase supercooled state;
the pump 6 is arranged on the circulating working medium liquid supply pipeline;
the condenser 4 is arranged on the circulating working medium liquid return pipeline to cool the cooling working medium flowing through the circulating working medium liquid return pipeline;
and the first valve 13 is arranged on the circulating working medium liquid supply pipeline and positioned between the pump 6 and the evaporator 1, and the opening degree of the first valve is adjusted to control the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 to be in a gas-liquid two-phase state.
For the two-phase fluid cooling system disclosed in the above embodiment, it can be understood by those skilled in the art that the cooling working medium undergoes phase change in the evaporator 1, and changes from a liquid phase supercooled state to a gas-liquid two-phase state, and therefore, the evaporator 1 has higher heat dissipation capability for heat generating equipment compared with simple gas-cooling and liquid-cooling equipment.
For the two-phase fluid cooling system disclosed in the above embodiment, it can be understood by those skilled in the art that the mechanical pump drives the cooling working medium to flow circularly, which has better start-up performance and stable operation compared with the capillary force driven heat pipe, and in addition, the control of the mechanical pump makes the cooling working medium flowing from the evaporator 1 into the circulating working medium return pipeline in a gas-liquid two-phase state can ensure that the heat emitted from the heat generating equipment is mainly absorbed by the phase change of the cooling working medium, thereby ensuring that the two-phase fluid cooling system has higher cooling capacity and has greater adaptability to the dynamic change of the heating power and the cooling condition of the heat generating equipment.
In some optional embodiments, further comprising:
and the elastic component 31 is arranged in the air cavity and is connected with the movable partition plate 30 and the liquid storage tank 5.
With respect to the two-phase fluid cooling system disclosed in the above embodiment, it will be appreciated by those skilled in the art that the resilient member 31 may be a plurality of springs, each of which has one end connected to the movable partition 30 and the other end connected to the inner wall of the reservoir 5.
In some optional embodiments, further comprising:
the first temperature sensor 7 is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator 1 and the condenser 4;
the first pressure sensor 8 is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator 1 and the condenser 4;
the controller 29 is electrically connected with the first valve 13, the first temperature sensor 7 and the first pressure sensor 8, judges whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 is in a gas-phase overheat state or not according to the temperature signal of the first temperature sensor 7 and the pressure signal of the first pressure sensor 8, and adjusts the opening degree of the first valve 13 to be increased if the cooling working medium is in the gas-phase overheat state; and judging whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 is in a liquid phase supercooling state, if so, adjusting to reduce the opening degree of the first valve 13.
In some alternative embodiments, the controller 29 is electrically connected to the pump 6, and if the cooling medium flowing from the evaporator 1 into the circulating medium return line is in a gas phase superheated state and the first valve 13 is fully opened, the pump 6 is adjusted to increase the flow rate of the circulating medium in the circulating medium supply line; and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 is in a liquid phase supercooling state and the opening degree of the first valve 13 is smaller than a set value, adjusting the pump 6 to reduce the flow of the cooling working medium in the circulating working medium liquid supply pipeline.
In some optional embodiments, further comprising:
an eighth valve 26 provided in the pressure air intake duct and electrically connected to the controller 29;
a ninth valve 27 disposed on the pressure gas outlet pipe and electrically connected to the controller 29;
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 is in a gas-phase overheat state and the first valve 13 is fully opened, the controller 29 adjusts to increase the opening degree of the eighth valve 26 and adjusts to decrease the opening degree of the ninth valve 27; and if the cooling medium flowing into the circulating medium return pipeline from the evaporator 1 is in a liquid phase supercooling state and the opening degree of the first valve 13 is smaller than a set value, the controller 29 adjusts to reduce the opening degree of the eighth valve 26 and adjusts to increase the opening degree of the ninth valve 27.
In some optional embodiments, further comprising:
a sixth temperature sensor 22 for detecting the temperature of the circulating medium chamber and electrically connected to the controller 29;
the fourth pressure sensor 23 is used for detecting the pressure of the circulating working medium cavity and is electrically connected with the controller 29;
the controller 29 judges whether the cooling medium in the circulating medium chamber is in a liquid phase supercooling state according to the temperature signal of the sixth temperature sensor 22 and the pressure signal of the fourth pressure sensor 23, and if not, the opening degree of the eighth valve 26 is increased by adjustment, and the opening degree of the ninth valve 27 is decreased by adjustment.
In some optional embodiments, further comprising:
and a vacuum pump 28 arranged on the pressure gas outlet pipeline.
In some optional embodiments, further comprising:
the inlet end of the first cold source channel is communicated with a first cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser 4, the inlet end of the first cold source channel is provided with a fourth valve 17, and the outlet end of the first cold source channel is provided with a fifth valve 18;
the inlet end of the second cold source channel is communicated with a second cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser 4, the inlet end of the second cold source channel is provided with a sixth valve 20, and the outlet end of the second cold source channel is provided with a seventh valve 21;
the controller 29 is electrically connected to the fourth valve 17, the fifth valve 18, the sixth valve 20, and the seventh valve 21, and includes:
the first control state controls the fourth valve 17 and the fifth valve 18 to be opened, and controls the sixth valve 20 and the seventh valve 21 to be closed;
and in the second control state, the fourth valve 17 and the fifth valve 18 are controlled to be closed, and the sixth valve 20 and the seventh valve 21 are controlled to be opened.
In some optional embodiments, further comprising:
a fourth temperature sensor 16 disposed at an inlet end of the first cool source channel and electrically connected to the controller 29;
a fifth temperature sensor 19 disposed at an inlet end of the second cool source channel and electrically connected to the controller 29;
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator 1 is in a gas-phase overheat state and the first valve 13 is fully opened, the controller 29 compares whether the temperature signal of the fourth temperature sensor 16 is less than the temperature signal of the fifth temperature sensor 19, if so, the controller 29 is in a first control state, otherwise, the controller 29 is in a second control state.
In some optional embodiments, the controller 29 further has:
a third control state, which controls the fourth valve 17 and the fifth valve 18 to be opened, and controls the sixth valve 20 and the seventh valve 21 to be opened;
if the cooling medium flowing into the circulating medium return pipeline from the evaporator 1 is in a gas phase overheating state and the first valve 13 is fully opened, the controller 29 is in a third control state.
In some alternative embodiments, the pressurized air source is aircraft engine bleed air and the evaporator 1 is used to dissipate heat from the onboard equipment.
As for the two-phase fluid cooling system disclosed above, it can be understood by those skilled in the art that when the cooling medium flowing into the circulating medium liquid return pipeline from the evaporator 1 is in a gas-phase overheat state, and the first valve 13 is fully opened, the controller 29 may control some or all of the first valve 13, the pump 6, the eighth valve 26, the ninth valve 27, the fourth valve 17, the fifth valve 18, the sixth valve 20, and the seventh valve 21 to perform a cooperative action, so as to ensure that the cooling medium flowing into the circulating medium liquid return pipeline from the evaporator 1 is in a gas-liquid state, thereby ensuring the heat dissipation capability of the two-phase fluid cooling system to the heat generating equipment, and the adaptability to the dynamic changes of the heating power and the cooling condition of the heat generating equipment.
In some optional embodiments, a plurality of evaporators are arranged in parallel with the evaporator 1, in a specific embodiment, a first parallel evaporator 2, a second parallel evaporator 3 are arranged, corresponding to the first temperature sensor 7, the first pressure sensor 8 and the first valve 13, the first parallel evaporator 2 is provided with a second temperature sensor 9, a second pressure sensor 10 and a second valve 14, and the second parallel evaporator 3 is provided with a third temperature sensor 11, a third pressure sensor 12 and a third valve 15.
In some optional embodiments, further comprising:
the seventh temperature sensor 24 is arranged on the circulating working medium liquid return pipeline, is positioned between the condenser 4 and the liquid storage tank 5, and is electrically connected with the controller 29;
the fifth pressure sensor 25 is arranged on the circulating working medium liquid return pipeline, is positioned between the condenser 4 and the liquid storage tank 5, and is electrically connected with the controller 29;
the controller 29 judges whether the cooling medium flowing into the liquid storage tank 5 from the circulating medium liquid return pipeline is in a gas-liquid two-phase state or not according to the temperature signal of the seventh temperature sensor 24 and the pressure signal of the fifth pressure sensor 25, if so, the controller 29 can control the first valve 13, the pump 6, the eighth valve 26, the ninth valve 27, the fourth valve 17, the fifth valve 18, the sixth valve 20 and the seventh valve 21 to act, and the action is consistent with that when the cooling medium flowing into the circulating medium liquid return pipeline from the evaporator 1 is in a gas-phase overheat state.
So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.
Claims (10)
1. A two-phase fluid cooling system, comprising:
an evaporator (1);
a liquid storage tank (5);
the movable partition plate (30) is arranged in the liquid storage tank (5) to divide the liquid storage tank (5) into a circulating working medium cavity and an air cavity; the outlet of the circulating working medium cavity is communicated with the inlet of the evaporator (1) through a circulating working medium liquid supply pipeline, and the inlet of the circulating working medium cavity is communicated with the outlet of the evaporator (1) through a circulating working medium liquid return pipeline; the inlet of the air cavity is communicated with a pressure air source through a pressure air inlet pipeline, and the outlet of the air cavity is communicated with the outside through a pressure air outlet pipeline, so that the pressure in the air cavity can be adjusted, the movable partition plate (30) can be driven to move, the volume of the circulating working medium cavity is changed, the pressure of the circulating working medium cavity is changed, and the cooling working medium in the circulating working medium cavity is ensured to be in a liquid-phase supercooling state;
the pump (6) is arranged on the circulating working medium liquid supply pipeline;
the condenser (4) is arranged on the circulating working medium liquid return pipeline and is used for cooling the cooling working medium flowing through the circulating working medium liquid return pipeline;
and the first valve (13) is arranged on the circulating working medium liquid supply pipeline and is positioned between the pump (6) and the evaporator (1), and the opening degree of the first valve can be adjusted to control the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) to be in a gas-liquid two-phase state.
2. The two-phase fluid cooling system of claim 1,
further comprising:
and the elastic component (31) is arranged in the air cavity and is connected with the movable partition plate (30) and the liquid storage tank (5).
3. The two-phase fluid cooling system of claim 1,
further comprising:
the first temperature sensor (7) is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator (1) and the condenser (4);
the first pressure sensor (8) is arranged on the circulating working medium liquid return pipeline and is positioned between the evaporator (1) and the condenser (4);
the controller (29) is electrically connected with the first valve (13), the first temperature sensor (7) and the first pressure sensor (8), whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a gas-phase overheating state or not is judged according to a temperature signal of the first temperature sensor (7) and a pressure signal of the first pressure sensor (8), and if yes, the opening degree of the first valve (13) is adjusted to be increased; and judging whether the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a liquid phase supercooling state, and if so, adjusting to reduce the opening of the first valve (13).
4. The two-phase fluid cooling system of claim 3,
the controller (29) is electrically connected with the pump (6), and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a gas-phase overheating state and the first valve (13) is fully opened, the pump (6) is adjusted to increase the flow of the circulating working medium in the circulating working medium liquid supply pipeline; and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a liquid phase supercooling state, and the opening degree of the first valve (13) is smaller than a set value, adjusting the pump (6) to reduce the flow of the cooling working medium in the circulating working medium liquid supply pipeline.
5. The two-phase fluid cooling system of claim 3,
further comprising:
an eighth valve (26) provided in the pressure gas intake duct and electrically connected to the controller (29);
a ninth valve (27) disposed on the pressure gas outlet pipe and electrically connected to the controller (29);
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a gas-phase overheating state and the first valve (13) is fully opened, the controller (29) adjusts to increase the opening degree of the eighth valve (26) and decreases the opening degree of the ninth valve (27); and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a liquid phase supercooling state and the opening degree of the first valve (13) is smaller than a set value, the controller (29) adjusts to reduce the opening degree of the eighth valve (26) and increases the opening degree of the ninth valve (27).
6. The two-phase fluid cooling system of claim 5,
further comprising:
the sixth temperature sensor (22) is used for detecting the temperature of the circulating working medium cavity and is electrically connected with the controller (29);
the fourth pressure sensor (23) is used for detecting the pressure of the circulating working medium cavity and is electrically connected with the controller (29);
and the controller (29) judges whether the cooling working medium in the circulating working medium cavity is in a liquid phase supercooling state or not according to the temperature signal of the sixth temperature sensor (22) and the pressure signal of the fourth pressure sensor (23), and if not, the controller adjusts the opening degree of the eighth valve (26) to be increased and adjusts the opening degree of the ninth valve (27) to be decreased.
7. The two-phase fluid cooling system of claim 5,
further comprising:
and the vacuum pump (28) is arranged on the pressure gas outlet pipeline.
8. The two-phase fluid cooling system of claim 3,
further comprising:
the inlet end of the first cold source channel is communicated with a first cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser (4), the inlet end of the first cold source channel is provided with a fourth valve (17), and the outlet end of the first cold source channel is provided with a fifth valve (18);
the inlet end of the second cold source channel is communicated with a second cold source and exchanges heat with the circulating working medium liquid return pipeline through the condenser (4), the inlet end of the second cold source channel is provided with a sixth valve (20), and the outlet end of the second cold source channel is provided with a seventh valve (21);
the controller (29) is electrically connected to the fourth valve (17), the fifth valve (18), the sixth valve (20), and the seventh valve (21), and has:
a first control state, which controls the fourth valve (17) and the fifth valve (18) to be opened, and controls the sixth valve (20) and the seventh valve (21) to be closed;
and in a second control state, the fourth valve (17) and the fifth valve (18) are controlled to be closed, and the sixth valve (20) and the seventh valve (21) are controlled to be opened.
9. The two-phase fluid cooling system of claim 8,
further comprising:
a fourth temperature sensor (16) arranged at the inlet end of the first cold source channel and electrically connected with the controller (29);
a fifth temperature sensor (19) arranged at the inlet end of the second cool source channel and electrically connected with the controller (29);
if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a gas-phase overheating state and the first valve (13) is fully opened, the controller (29) compares whether the temperature signal of the fourth temperature sensor (16) is smaller than the temperature signal of the fifth temperature sensor (19), if so, the controller (29) is in a first control state, otherwise, the controller (29) is in a second control state.
10. The two-phase fluid cooling system of claim 8,
the controller (29) further has:
a third control state, wherein the fourth valve (17) and the fifth valve (18) are controlled to be opened, and the sixth valve (20) and the seventh valve (21) are controlled to be opened;
and if the cooling working medium flowing into the circulating working medium liquid return pipeline from the evaporator (1) is in a gas-phase overheating state and the first valve (13) is fully opened, the controller (29) is in a third control state.
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| CN114206058A (en) * | 2020-09-02 | 2022-03-18 | 中兴通讯股份有限公司 | Temperature control system, communication equipment and temperature control method |
| CN114364232B (en) * | 2022-01-27 | 2023-03-03 | 南京航空航天大学 | Aircraft distributed pump-drive two-phase cooling system |
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| CN102620583B (en) * | 2011-02-01 | 2015-06-03 | 中国科学院过程工程研究所 | Sub-control phase change heat transfer tube and sub-control phase change heat transfer method |
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