CN118510229A - Airborne liquid cooling system and control method thereof - Google Patents
Airborne liquid cooling system and control method thereof Download PDFInfo
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- CN118510229A CN118510229A CN202410623194.4A CN202410623194A CN118510229A CN 118510229 A CN118510229 A CN 118510229A CN 202410623194 A CN202410623194 A CN 202410623194A CN 118510229 A CN118510229 A CN 118510229A
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- 239000007788 liquid Substances 0.000 title claims abstract description 183
- 238000001816 cooling Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000110 cooling liquid Substances 0.000 claims abstract description 92
- 230000017525 heat dissipation Effects 0.000 claims abstract description 37
- 238000001704 evaporation Methods 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims description 35
- 230000008020 evaporation Effects 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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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
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20881—Liquid coolant with phase change
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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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20309—Evaporators
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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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20318—Condensers
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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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20354—Refrigerating circuit comprising a compressor
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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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20381—Thermal management, e.g. evaporation control
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to an airborne liquid cooling system and discloses an airborne liquid cooling system and a control method thereof, wherein the airborne liquid cooling system comprises a condensate liquid return port and a condensate liquid output port which are connected to airborne equipment, a cooling liquid return pipe is connected between the condensate liquid return port and an evaporator, a cooling liquid output pipe is connected between the condensate liquid output port and the evaporator, a cooling coil pipe arranged at the condenser is connected between the cooling liquid return pipe and the cooling liquid output pipe, and a liquid inlet end of the cooling liquid return pipe, a liquid inlet end of the cooling coil pipe and a liquid inlet end of the evaporator are connected through an electric three-way valve. According to the invention, the heat dissipation of the condensing side can be adjusted by utilizing the equipment heating load absorbed by the liquid cooling system under the condition that the ram air at the condensing side is not adjustable, so that the influence of the flying height and speed on the heat dissipation effect of the ram air at the condensing side is balanced to a certain extent, the attenuation of the cooling capacity at the evaporating side is reduced as much as possible, and the temperature control precision is maintained.
Description
Technical Field
The invention relates to an airborne liquid cooling system, in particular to an airborne liquid cooling system and a control method thereof.
Background
The airborne liquid cooling system mainly comprises two refrigeration modes, namely an evaporation circulation refrigeration system and an air circulation refrigeration system.
The heat dissipation mode of the condenser of the airborne liquid cooling system of the evaporation circulation refrigerating system is to discharge heat to heat sinks such as ram air or fuel oil. An aircraft matched with an airborne liquid cooling system adopting an evaporation circulation refrigerating system has the characteristics of large flight height span, large flight speed change and the like due to task and application requirements. Correspondingly, liquid cooling systems employing ram air as the heat transfer means for condensing heat can be adversely affected.
Specifically, the temperature density of the atmosphere changes obviously along with the altitude, the ram air temperature is high in density and large in low-altitude flight, the ram air temperature is low in density and low in high-altitude flight, the heat dissipation effect on the condensing side is greatly influenced, and the refrigerating capacity on the evaporating side is further influenced. The airborne liquid cooling system generally provides cooling for airborne radar and other equipment, the thermal load of the equipment required to be cooled does not change with altitude, or changes little, and the higher temperature control precision requirement is also provided.
In addition, the change of the flying speed also affects the ram air quantity, the surface temperature of the aircraft skin and the like, and has direct or indirect influence on the operation of the condenser adopting ram air for heat dissipation.
Therefore, in the field of airborne liquid cooling systems employing an evaporation circulation refrigeration system, there is a need to study an airborne liquid cooling system to solve the above problems under the conditions of atmospheric temperature (altitude) and flying speed variation.
The existing airborne liquid cooling system uses ram air as a condensing side heat dissipation mode, works normally under low-altitude flight conditions without adjusting condensing pressure, and can adjust air flow by adopting an exhaust valve or an adjustable door arranged on a ram air pipe of a condenser during high-altitude flight so as to maintain condensing temperature. The condensing heat dissipation capacity can be adjusted, and the cost is that the structure is complex, and the performance compensation loss of the aircraft is increased.
In addition, most of the airborne liquid cooling systems are installed in the late stage, and not all of the airborne platforms (airplanes) allow for the installation of exhaust valves or adjustable dampers.
In the condition that ram air cannot be regulated, in order to cope with low-temperature starting operation, a condensing pressure regulating valve can be correspondingly adopted in a refrigerating system of the liquid cooling system. After the air conditioner is started when the air temperature is low, the high-pressure regulating valve of the condensing pressure regulating valve is in a closed state until the refrigerant discharged by the compressor is accumulated in the condenser, the heat transfer area of the condenser is reduced during liquid accumulation, and the condensing pressure is gradually increased.
However, the temperature of the high-altitude atmosphere is too low, and at the moment, the heat dissipation load of equipment in the airborne platform can still be standard value or even peak value, and measures need to be taken. The low temperature working condition is considered, so that the output capacity of the standard working condition of the refrigerating system is improved, and the size, the weight and the energy consumption are correspondingly increased, so that the performance compensation loss of the aircraft is increased.
Disclosure of Invention
The invention provides an airborne liquid cooling system and a control method thereof, aiming at the problems of the airborne liquid cooling system in the prior art.
In order to solve the technical problems, the invention is solved by the following technical scheme:
The airborne liquid cooling system comprises a condensate liquid return port and a condensate liquid output port which are connected to airborne equipment, wherein an evaporation circulation refrigeration loop is connected between the condensate liquid return port and the condensate liquid output port, and comprises an evaporator, a compressor, a condenser and an expansion valve which are sequentially connected and form a loop, the condensate liquid return port is connected with an inlet of the evaporator, and the condensate liquid output port is connected with an outlet of the evaporator;
The condensate liquid return port is connected with a cooling liquid return pipe between the condensate liquid return port and the evaporator, a cooling liquid output pipe is connected between the condensate liquid output port and the evaporator, a cooling coil pipe arranged at the condenser is connected between the cooling liquid return pipe and the cooling liquid output pipe, and the liquid inlet end of the cooling coil pipe and the liquid inlet end of the evaporator are connected through an electric three-way valve.
Preferably, the condenser comprises a condenser housing and a condenser coil disposed within the condenser housing, and the heat dissipating coil is disposed within the condenser housing.
Preferably, the inlet and outlet of the evaporator are respectively connected with an evaporator liquid inlet pipe and an evaporator liquid outlet pipe, the evaporator liquid inlet pipe is connected with a cooling liquid return pipe, the evaporator liquid outlet pipe is connected with a cooling liquid output pipe,
The heat dissipation coil is connected with a coil liquid inlet pipe and a coil liquid outlet pipe, and the electric three-way valve is arranged among the coil liquid inlet pipe, the evaporator liquid inlet pipe and the cooling liquid return pipe.
Preferably, the liquid return port of the cooling liquid return pipe is sequentially provided with a liquid return end liquid connector, a water tank and a water pump, and the cooling liquid output pipe is sequentially provided with an output end liquid connector and a filter from the condensed liquid output port.
Preferably, the water tank is provided with a safety valve and an automatic exhaust valve, and the water tank is also connected with a drain valve.
Preferably, check valves capable of flowing to the condensate outlet are arranged on the coil pipe liquid outlet pipe and the evaporator liquid outlet pipe.
Preferably, the inlet and the outlet of the condenser coil are respectively provided with a condenser liquid inlet pipe and a condenser liquid outlet pipe, a differential pressure regulating valve is connected between the condenser liquid inlet pipe and the condenser liquid outlet pipe, and a high-pressure regulating valve and a liquid storage tank are sequentially connected between the condenser liquid outlet pipe and the expansion valve from the condenser end.
The control method of the airborne liquid cooling system is realized by adopting an airborne liquid cooling system, and comprises the step of controlling an electric three-way valve according to the atmospheric temperature to realize the control of the flow of a radiating coil, so as to realize the regulation of the heat radiation of a condensing side.
Preferably, the atmospheric temperature is calculated from altitude or is obtained from a temperature sensor provided at the condensing side charge air inlet.
Preferably, when the atmospheric temperature is calculated according to the altitude, the input altitude is divided into three working sections, namely, a low altitude range altitude 0-H L, a middle range H L～HH and a high altitude range H H～Hmax, and three ports of the electric three-way valve are respectively set as an a port communicated with a condensate liquid return port, a b port communicated with an evaporator and a c port communicated with a radiating coil;
When the altitude is in the low altitude range of 0-H L, the control modes are divided into two control modes,
Mode (1): the circulating cooling liquid is connected to the electric three-way valve through the cooling liquid return pipe, ab in the control valve is conducted, ac is closed, the circulating cooling liquid is connected to the evaporator through the ab channel, the cold energy of the evaporation circulation is absorbed, the cooling liquid is cooled and then is connected to the cooling liquid output port through the cooling liquid output pipe, the cooling liquid is output to the user load, and the cooling liquid is recycled to the condensate return port after the load heat is absorbed;
Mode (2): when the condensing side is in the working temperature range of the differential pressure regulating valve (28) and the high pressure regulating valve (29), T Feed device ≥T Setting up < + > delta T indicates that the evaporating side still needs to be refrigerated, the differential pressure regulating valve and the high pressure regulating valve arranged on the evaporation circulation refrigeration loop are used for regulating condensing pressure, wherein a condenser liquid inlet pipe and a condenser liquid outlet pipe are respectively arranged at the inlet and the outlet of the condenser, the differential pressure regulating valve is connected between the condenser liquid inlet pipe and the condenser liquid outlet pipe, and the high pressure regulating valve and a liquid storage tank are sequentially connected between the condenser liquid outlet pipe and the expansion valve from the condenser end; wherein T Feed device is the temperature of the circulating cooling liquid of the condensate outlet (2), T Setting up is the target value of the temperature of the circulating cooling liquid of the condensate outlet (2), and Deltat is the fluctuation range value of the temperature of the circulating cooling liquid of the condensate outlet (2);
altitude is in the high altitude range of H H～Hmax:
The circulating cooling liquid is cooled down and then is output to a cooling liquid output port through a cooling liquid output pipe, is output to a user load, and is recycled to a condensate liquid return port after absorbing load heat;
When the heat dissipation capacity of the heat dissipation coil in the ram air duct is larger than the heat absorbed by the liquid cooling system from the user side, the electric three-way valve adjusts the opening degrees of the ac and ab channels, and the split cooling liquid of the ab channel passes through the evaporator and bypasses the heat dissipation coil and then is communicated with the liquid supply main pipeline, so that no heat exchange exists at the evaporator; the liquid supply main pipeline is a main pipeline formed by connecting a cooling liquid return pipe (7) with a cooling liquid output pipe (8) through an evaporator;
altitude is in the middle range of H L～HH:
and controlling the electric three-way valve ac channel and the electric three-way valve ab channel to be opened.
The invention has the remarkable technical effects due to the adoption of the technical scheme:
According to the invention, the heat dissipation of the condensing side can be adjusted by utilizing the equipment heating load absorbed by the liquid cooling system under the condition that the ram air at the condensing side is not adjustable, so that the influence of the flying height and speed on the heat dissipation effect of the ram air at the condensing side is balanced to a certain extent, the attenuation of the cooling capacity at the evaporating side is reduced as much as possible, and the temperature control precision is maintained.
Drawings
Fig. 1 is a schematic diagram of an on-board liquid cooling system in embodiment 1 of the present invention.
Fig. 2 is a control flow chart of the on-board liquid cooling system in embodiment 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
The airborne liquid cooling system comprises a condensate liquid return port 1 and a condensate liquid output port 2 which are connected to airborne equipment, wherein an evaporation circulation refrigeration loop is connected between the condensate liquid return port 1 and the condensate liquid output port 2 and comprises an evaporator 3, a compressor 4, a condenser 5 and an expansion valve 6 which are sequentially connected and form a loop, the condensate liquid return port 1 is connected with an inlet of the evaporator 3, and the condensate liquid output port 2 is connected with an outlet of the evaporator 3;
A cooling liquid return pipe 7 is connected between the condensate liquid return port 1 and the evaporator 3, a cooling liquid output pipe 8 is connected between the condensate liquid output port 2 and the evaporator 3, a heat dissipation coil 9 arranged at the condenser 5 is connected between the cooling liquid return pipe 7 and the cooling liquid output pipe 8, the liquid inlet end of the cooling coil 9 and the liquid inlet end of the evaporator 3 are connected through an electric three-way valve 10,
Wherein, the inlet and the outlet of the evaporator 3 are respectively connected with an evaporator liquid inlet pipe 13 and an evaporator liquid outlet pipe 14, the evaporator liquid inlet pipe 13 is connected with a cooling liquid return pipe 7, the evaporator liquid outlet pipe 14 is connected with a cooling liquid output pipe 8,
The heat radiation coil 9 is connected with a coil liquid inlet pipe 15 and a coil liquid outlet pipe 16, and the electric three-way valve 10 is arranged among the coil liquid inlet pipe 15, the evaporator liquid inlet pipe 13 and the cooling liquid return pipe 7.
In this embodiment, the condenser 5 includes a condenser housing 11 and a condenser coil 12 disposed in the condenser housing 11, the heat dissipation coil 9 is disposed in the condenser housing 11 and located at an upstream position of the condenser coil 12, the upstream position is a position closer to the condensate liquid return port 1, and since the heat dissipation coil 9 is located upstream of the condenser 5, the heat dissipation capacity during operation of the heat dissipation coil can improve the condensation pressure in the condenser 5, and the condensation pressure of the condenser 5 is finely adjusted together in cooperation with a condensation pressure adjusting valve, so that the normal operation of the refrigeration cycle in a critical state is ensured and the cold output capacity is ensured.
In this embodiment, the cooling liquid return pipe 7 is sequentially provided with a liquid return end liquid connector 17, a water tank 18 and a water pump 19 from the condensate liquid return port 1, and the cooling liquid output pipe 8 is sequentially provided with an output end liquid connector 20 and a filter 21 from the condensate liquid output port 2. The water tank 18 is provided with a safety valve 22 and an automatic exhaust valve 24, and is also connected with a drain valve 23, and check valves 25 capable of flowing to the condensate outlet 2 are arranged on the coil drain pipe 16 and the evaporator drain pipe 14.
The inlet and the outlet of the condenser coil 12 are respectively provided with a condenser liquid inlet pipe 26 and a condenser liquid outlet pipe 27, a differential pressure regulating valve 28 is connected between the condenser liquid inlet pipe 26 and the condenser liquid outlet pipe 27, and a high-pressure regulating valve 29 and a liquid storage tank 30 are sequentially connected between the condenser liquid outlet pipe 27 and the expansion valve 6 from the condenser 5 end. The differential pressure regulating valve 28 and the high pressure regulating valve 29 can effectively regulate the condensing pressure under the required condition, ensure the normal operation of the refrigeration cycle and output cold energy.
The embodiment also provides a control method of the airborne liquid cooling system, which is implemented by adopting the airborne liquid cooling system, and comprises the steps of controlling the electric three-way valve 10 according to the atmospheric temperature to control the flow of the heat dissipation coil 9, so as to adjust the heat dissipation of the condensation side, wherein the atmospheric temperature is calculated according to the altitude or is obtained according to a temperature sensor arranged at the air inlet of the condensation side air flushing.
Given in this example is the calculation from altitude:
Specifically, when altitude signals are input, atmospheric temperature is calculated according to altitude, an initial value of the opening of the three-way valve is determined in a stepping way in a control logic, then the opening is finely adjusted according to condensing temperature or pressure so as to correspond to the influence of the change of the altitude on the condensing side, in the embodiment, the input altitude is divided into three working sections, namely, the altitude of a low altitude range is 0-H L, the middle range is H L～HH and the high altitude range is H H～Hmax, and three ports of the electric three-way valve 10 are respectively set as an a port communicated with a condensate liquid return port 1, a b port communicated with an evaporator 3 and a c port communicated with a heat dissipation coil 9;
when the altitude is at a low altitude range altitude of 0-H L, there are two modes:
mode (1): the circulating cooling liquid passes through the cooling liquid return pipe 7, the water tank 18 and the water pump 19 to the electric three-way valve 10, ab in the control valve is conducted, ac is closed, the circulating cooling liquid passes through the ab channel to the evaporator 3, the cold energy of evaporation circulation is absorbed, the cooling liquid passes through the cooling liquid output pipe 8, the check valve 25, the filter 21 and the output end liquid connector 20 to the cooling liquid output port after cooling, the cooling liquid is output to the user load, and the cooling liquid is recycled to the condensate return port 1 after absorbing the load heat; and then recycled to the liquid return side liquid connector 17 and the water tank 18 after absorbing the heat of the equipment load.
Mode (2): the altitude is in the low altitude range altitude of 0-H L, due to weather change, altitude rise and other factors, at this time, the condensation side is in the working temperature range of the differential pressure regulating valve 28 and the high pressure regulating valve 29, T Feed device ≥T Setting up + +Deltat, which means that the evaporation side still needs to refrigerate, and the differential pressure regulating valve 28 and the high pressure regulating valve 29 arranged on the evaporation circulation refrigeration circuit regulate the condensation pressure, so as to ensure the normal operation of the refrigeration circulation and output cold energy.
Wherein the inlet and outlet of the condenser 5 are respectively provided with a condenser liquid inlet pipe 26 and a condenser liquid outlet pipe 27, a differential pressure regulating valve 28 is connected between the condenser liquid inlet pipe 26 and the condenser liquid outlet pipe 27, and a high-pressure regulating valve 29 and a liquid storage tank 30 are sequentially connected between the condenser liquid outlet pipe 27 and the expansion valve 6 from the condenser 5 end;
Wherein T Feed device is the temperature of the circulating cooling liquid at the condensate outlet 2, namely the temperature of the circulating cooling liquid after the whole system treatment; t Setting up is a target value of the temperature of the circulating cooling liquid of the condensate outlet 2, and the control part of the whole airborne liquid cooling system is provided with the target temperature; delta t is the fluctuation range value of the temperature of the circulating cooling liquid at the condensate outlet 2, and is generally 0.1-2 ℃, and is determined based on equipment precision and user requirements;
altitude is in the high altitude range of H H～Hmax:
The circulating cooling liquid is fed into the electric three-way valve 10 through the cooling liquid return pipe 7 by the water tank 18 and the water pump 19, the ac in the control valve is conducted and ab is closed, the circulating cooling liquid is fed into the heat dissipation coil 9 through the electric three-way valve 10, the cold energy of evaporation circulation is absorbed, the cooling liquid is fed into the cooling liquid output port through the cooling liquid output pipe 8 by the check valve 25, the filter 21 and the output end liquid connector 20 after being cooled, the cooling liquid is output to the user load, and the cooling liquid is recycled to the condensate liquid return port 1 after the load heat is absorbed; and then recycled to the liquid return side liquid connector 17 and the water tank 18 after absorbing the heat of the equipment load.
In this range, when the altitude is continuously increased and the ram air temperature is reduced to a certain extent, the heat dissipation capacity of the heat dissipation coil 9 in the ram air duct is larger than the heat absorbed by the liquid cooling system from the user side, the electric three-way valve 10 adjusts the opening degrees of the ac and ab channels according to the change of the liquid supply temperature, and the evaporator 3 is not in operation and is only a part of a runner because the evaporation circulation system is not in heat exchange, so that the heat exchange is not in the evaporator 3, the split cooling liquid of the ab channel is communicated with the liquid supply main pipeline after passing through the evaporator 3 and bypassing the heat dissipation coil 9, and the effect of adjusting the heat dissipation capacity of the radiator is achieved, and the liquid supply main pipeline is a main pipeline formed by connecting the cooling liquid return pipe 7 with the cooling liquid output pipe 8 through the evaporator.
When the altitude is in the middle range of H L～HH, the state that the liquid cooling pipeline split-flow mode exists simultaneously while the evaporation circulation refrigeration system works exists, and the ac channel and the ab channel in the electric three-way valve 10 are controlled to be opened.
When the evaporation circulation refrigerating system works, the electric three-way valve 10 is opened, part of hot circulating liquid is regulated to be transmitted to the heat radiating coil 9, and as the heat radiating coil 9 is arranged at the upstream of the condenser 5, the heat radiating capacity can improve the condensation pressure in the condenser 5, and the condensation pressure of the condenser 5 is finely regulated together with the condensation pressure regulating valve, so that the normal operation of the refrigerating circulation system in a critical state is ensured and the cold capacity is output.
It is to be understood that, based on one or several embodiments provided in the present application, those skilled in the art may combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments, which do not exceed the protection scope of the present application.
In summary, the foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the invention.
Claims (10)
1. The utility model provides an airborne liquid cooling system, including connecting condensate liquid return port (1) and condensate delivery outlet (2) on airborne equipment, be connected with the evaporation circulation refrigeration circuit between condensate liquid return port (1) and the condensate delivery outlet (2), the evaporation circulation refrigeration circuit is including connecting gradually and constituting evaporimeter (3), compressor (4), condenser (5) and expansion valve (6) of return circuit, condensate liquid return port (1) is connected with the import of evaporimeter (3), the exit linkage of condensate delivery outlet (2) and evaporimeter (3);
The method is characterized in that: a cooling liquid return pipe (7) is connected between the condensate liquid return port (1) and the evaporator (3), a cooling liquid output pipe (8) is connected between the condensate liquid output port (2) and the evaporator (3), a heat dissipation coil pipe (9) arranged at the condenser (5) is connected between the cooling liquid return pipe (7) and the cooling liquid output pipe (8), and a liquid inlet end of the cooling liquid return pipe (7), a liquid inlet end of the heat dissipation coil pipe (9) and a liquid inlet end of the evaporator (3) are connected through an electric three-way valve (10).
2. The on-board liquid cooling system of claim 1, wherein: the condenser (5) comprises a condenser shell (11) and a condenser coil (12) arranged in the condenser shell (11), and the heat dissipation coil (9) is arranged in the condenser shell (11).
3. The on-board liquid cooling system of claim 1, wherein: the inlet and the outlet of the evaporator (3) are respectively connected with an evaporator liquid inlet pipe (13) and an evaporator liquid outlet pipe (14), the evaporator liquid inlet pipe (13) is connected with a cooling liquid return pipe (7), the evaporator liquid outlet pipe (14) is connected with a cooling liquid output pipe (8),
The heat dissipation coil pipe (9) is connected with a coil pipe liquid inlet pipe (15) and a coil pipe liquid outlet pipe (16), and the electric three-way valve (10) is arranged among the coil pipe liquid inlet pipe (15), the evaporator liquid inlet pipe (13) and the cooling liquid return pipe (7).
4. An on-board liquid cooling system as claimed in claim 3, wherein: the liquid return pipe (7) is sequentially provided with a liquid return end liquid connector (17), a water tank (18) and a water pump (19) from a condensate liquid return port (1), and the cooling liquid output pipe (8) is sequentially provided with an output end liquid connector (20) and a filter (21) from a condensate liquid output port (2).
5. The on-board liquid cooling system of claim 4, wherein: the water tank (18) is provided with a safety valve (22) and an automatic exhaust valve (24), and the water tank (18) is also connected with a liquid discharge valve (23).
6. An on-board liquid cooling system as claimed in claim 3, wherein: check valves (25) capable of flowing to the condensate outlet (2) are arranged on the coil pipe liquid outlet pipe (16) and the evaporator liquid outlet pipe (14).
7. An on-board liquid cooling system as claimed in claim 2, wherein: the inlet and the outlet of the condenser coil pipe (12) are respectively provided with a condenser liquid inlet pipe (26) and a condenser liquid outlet pipe (27), a differential pressure regulating valve (28) is connected between the condenser liquid inlet pipe (26) and the condenser liquid outlet pipe (27), and a high-pressure regulating valve (29) and a liquid storage tank (30) are sequentially connected between the condenser liquid outlet pipe (27) and the expansion valve (6) from the end of the condenser (5).
8. An airborne liquid cooling system control method is characterized in that the method is realized by adopting the airborne liquid cooling system according to any one of claims 1-7, and the method comprises the step of controlling an electric three-way valve (10) according to the atmospheric temperature to realize the control of the flow of a heat dissipation coil (9), so as to realize the adjustment of heat dissipation of a condensing side.
9. The method according to claim 8, wherein the atmospheric temperature is calculated from altitude or is obtained from a temperature sensor provided at the condensing side charge air inlet.
10. The method for controlling an on-board liquid cooling system according to claim 9, it is characterized in that the method comprises the steps of,
When the atmospheric temperature is obtained by calculation according to the altitude, the input altitude is divided into three working sections, namely, a low altitude range altitude 0-H L, a middle range H L～HH and a high altitude range H H～Hmax, and three ports of the electric three-way valve (10) are respectively set as an a port communicated with a condensate liquid return port (1), a b port communicated with an evaporator (3) and a c port communicated with a heat dissipation coil pipe (9); when the altitude is at a low altitude range altitude of 0-H L, there are two control modes:
Mode (1): the circulating cooling liquid is conveyed to an electric three-way valve (10) through a cooling liquid return pipe (7), ab in the control valve is conducted, ac is closed, the circulating cooling liquid is conveyed to an evaporator (3) through an ab channel, the cold energy of evaporation circulation is absorbed, and the cooling liquid is conveyed to a cooling liquid output port through a cooling liquid output pipe (8) after being cooled, is output to a user load, and is recycled to a condensate return port (1) after absorbing the load heat;
Mode (2): when the condensing side is in the working temperature range of the differential pressure regulating valve (28) and the high-pressure regulating valve (29), T Feed device ≥T Setting up < + > is equal to delta T, the condensing side still needs to be refrigerated, and the condensing pressure is regulated by the differential pressure regulating valve (28) and the high-pressure regulating valve (29) which are arranged on the evaporation circulation refrigeration loop, wherein a condenser liquid inlet pipe (26) and a condenser liquid outlet pipe (27) are respectively arranged at the inlet and the outlet of the condenser (5), the differential pressure regulating valve (28) is connected between the condenser liquid inlet pipe (26) and the condenser liquid outlet pipe (27), and the high-pressure regulating valve (29) and a liquid storage tank (30) are sequentially connected between the condenser liquid outlet pipe (27) and the expansion valve (6) from the condenser (5); wherein T Feed device is the temperature of the circulating cooling liquid of the condensate outlet (2), T Setting up is the target value of the temperature of the circulating cooling liquid of the condensate outlet (2), and Deltat is the fluctuation range value of the temperature of the circulating cooling liquid of the condensate outlet (2);
altitude is in the high altitude range of H H～Hmax:
The circulating cooling liquid is connected to an electric three-way valve (10) through a cooling liquid return pipe (7), the control valve is internally conducted by ac, the control valve is closed by ab, the circulating cooling liquid is connected to a radiating coil pipe (9) through the electric three-way valve (10), the cooling capacity of evaporation circulation is absorbed, the cooling liquid is connected to a cooling liquid output port through a cooling liquid output pipe (8) after being cooled, the cooling liquid is output to a user load, and the cooling liquid is recycled to a condensate liquid return port (1) after the load heat is absorbed;
When the heat dissipation capacity of the heat dissipation coil (9) in the ram air duct is larger than the heat absorbed by the liquid cooling system from the user side, the electric three-way valve (10) adjusts the opening degrees of the ac and ab channels, and the split cooling liquid of the ab channel passes through the evaporator (3) and bypasses the heat dissipation coil (9) and is communicated with the liquid supply main pipeline, so that no heat exchange exists at the evaporator (3); the liquid supply main pipeline is a main pipeline formed by connecting a cooling liquid return pipe (7) with a cooling liquid output pipe (8) through an evaporator;
Altitude is in the middle range of H L～HH: and controlling the electric three-way valve (10) to open an ac channel and an ab channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410623194.4A CN118510229A (en) | 2024-05-20 | 2024-05-20 | Airborne liquid cooling system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410623194.4A CN118510229A (en) | 2024-05-20 | 2024-05-20 | Airborne liquid cooling system and control method thereof |
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