CN110385963B - Electric automobile air conditioning system and control method thereof - Google Patents
Electric automobile air conditioning system and control method thereof Download PDFInfo
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- CN110385963B CN110385963B CN201910681755.5A CN201910681755A CN110385963B CN 110385963 B CN110385963 B CN 110385963B CN 201910681755 A CN201910681755 A CN 201910681755A CN 110385963 B CN110385963 B CN 110385963B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000110 cooling liquid Substances 0.000 claims abstract description 265
- 230000017525 heat dissipation Effects 0.000 claims abstract description 34
- 239000003507 refrigerant Substances 0.000 claims abstract description 32
- 239000002826 coolant Substances 0.000 claims description 75
- 230000001105 regulatory effect Effects 0.000 claims description 67
- 238000001816 cooling Methods 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005057 refrigeration Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 13
- 239000012809 cooling fluid Substances 0.000 description 8
- 238000010248 power generation Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses an electric automobile air conditioning system and a control method thereof, wherein the electric automobile air conditioning system comprises a refrigerant loop and a cooling liquid loop, the cooling liquid loop comprises a power module, a heat dissipation module, a thermoelectric generation module and a first cooling liquid circulating pump, the power module is connected with the heat dissipation module through a first cooling liquid pipeline, the heat dissipation module is connected with the first cooling liquid circulating pump through a second cooling liquid pipeline, the first cooling liquid circulating pump is connected with the power module through a third cooling liquid pipeline, and the thermoelectric generation module is positioned between the first cooling liquid pipeline and the second cooling liquid pipeline.
Description
Technical Field
The invention relates to the technical field of electric automobile air conditioners, in particular to an electric automobile air conditioning system and a control method thereof.
Background
With the development of electric automobile technology, the electric automobile air conditioning system has a certain restriction on the development of the electric automobile, the PTC heater is called PTC heating element, and is composed of PTC ceramic heating element and aluminum tube, so that the electric automobile air conditioning system has the characteristics of high heat exchange efficiency and quick heating, the conventional electric automobile air conditioning system mostly adopts the PTC heater to realize warm air heating function and utilizes the PTC heater to heat a power battery in winter so as to ensure the normal discharge of the power battery, and in order to realize the warm air function of the electric automobile and ensure the normal operation of the power battery, two PTC heaters are usually needed to participate in the operation, and the PTC heater has high power consumption and can greatly reduce the operation mileage of the electric automobile after being started; in addition, the power battery can generate a large amount of heat in the charging and discharging process, so that the safety of the battery is ensured, the heat of the power battery needs to be removed, other energy-consuming equipment such as a driving motor and a motor controller of the electric automobile can work just by being well cooled, and then an independent cooling system needs to be designed for heat dissipation treatment, so that the endurance mileage of the electric automobile can be greatly influenced, the heat of the power battery, the driving motor and other energy-consuming equipment cannot be utilized, and the energy waste is caused.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide an electric automobile air conditioning system and a control method thereof, wherein the electric automobile air conditioning system can fully recycle heat generated by the operation of a power part of an electric automobile, and can effectively cool the power part so as to achieve the technical effect of saving energy consumption and improve the cruising ability of the electric automobile.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides an electric automobile air conditioning system, includes refrigerant circuit and coolant liquid circuit, the coolant liquid circuit includes power module, heat dissipation module, thermoelectric generation module and first coolant liquid circulating pump, power module passes through first coolant liquid pipeline connection heat dissipation module, heat dissipation module passes through the second coolant liquid pipeline connection first coolant liquid circulating pump, first coolant liquid circulating pump passes through the third coolant liquid pipeline connection power module, thermoelectric generation module is located between first coolant liquid pipeline with the second coolant liquid pipeline.
In the electric automobile air conditioning system, the cooling liquid loop further comprises a warm air water tank, wherein the warm air water tank is connected with the first cooling liquid pipeline through the fourth cooling liquid pipeline and is connected with the third cooling liquid pipeline through a fifth cooling liquid pipeline; the fourth cooling liquid pipeline is communicated with the first cooling liquid pipeline through a first regulating valve, the first cooling liquid pipeline is further provided with a second regulating valve used for regulating the connection state of the power module and the heat dissipation module, and the second cooling liquid pipeline is communicated with the fifth cooling liquid pipeline through a third regulating valve.
In the electric automobile air conditioning system, the cooling liquid loop further comprises a PTC heater, wherein the PTC heater is connected with the first cooling liquid pipeline through a sixth cooling liquid pipeline and is connected with the third cooling liquid pipeline through a seventh cooling liquid pipeline, and the sixth cooling liquid pipeline is provided with a second cooling liquid circulating pump; the first coolant line is further provided with a fourth regulating valve, and the third coolant line is provided with a fifth regulating valve.
In the electric automobile air conditioning system, the heat dissipation module comprises a radiator, wherein the radiator is connected with the power module through the first cooling liquid pipeline and is connected with the first cooling liquid circulating pump through the second cooling liquid pipeline.
In the electric automobile air conditioning system, the heat dissipation module comprises a cooling metal conduction block, the heat radiator is connected with the cooling metal conduction block through a first cooling liquid pipeline and is connected with the cooling metal conduction block through an eighth cooling liquid pipeline, and the cooling metal conduction block is connected with the first cooling liquid circulating pump through a second cooling liquid pipeline.
In the electric automobile air conditioning system, the thermoelectric generation module comprises thermoelectric generation pieces, and the thermoelectric generation pieces are positioned between the first cooling liquid pipeline and the second cooling liquid pipeline.
In the electric automobile air conditioning system, the refrigerant loop comprises a compressor, a condenser, an expansion valve, an evaporator and a liquid storage dryer, wherein the compressor is connected with the condenser through a first refrigerant pipeline, the condenser is connected with the expansion valve through a second refrigerant pipeline, the expansion valve is connected with the evaporator, the expansion valve is further connected with the cold metal conducting block through a third refrigerant pipeline, the cold metal conducting block is further connected with the liquid storage dryer through a fourth refrigerant pipeline, and the liquid storage dryer is further connected with the compressor through a fifth refrigerant pipeline.
In the air conditioning system of the electric automobile, the expansion valve is an electronic expansion valve or a thermal expansion valve.
In the electric automobile air conditioning system, the evaporator is a segment evaporator, a strip tube evaporator or a laminated evaporator.
The control method based on the electric automobile air conditioning system comprises a refrigerating mode and a heating mode:
in a refrigeration mode, the refrigerant loop works, the first regulating valve and the third regulating valve in the cooling liquid loop are closed, and the second regulating valve, the fourth regulating valve and the fifth regulating valve are opened; the first cooling liquid circulating pump is started, the low-temperature cooling liquid is changed into high-temperature cooling liquid after the low-temperature cooling liquid passes through the third cooling liquid pipeline and flows through the power module to absorb heat of the power module, the high-temperature cooling liquid passes through the radiator through the first cooling liquid pipeline to cool for the first time, and then passes through the cold metal conducting block to cool for the second time to become low-temperature cooling liquid, and the low-temperature cooling liquid passes through the second cooling liquid pipeline to flow to the third cooling liquid pipeline;
when in a heating mode, the refrigerant loop is closed, a fourth regulating valve and a fifth regulating valve in the cooling liquid loop are closed, the second cooling liquid circulating pump is opened, the PTC heater is opened, the cooling liquid in the sixth cooling liquid pipeline and the seven cooling liquid pipelines is heated, high-temperature cooling liquid is obtained and circulated through the second cooling liquid circulating pump to heat the power module, and after the power module works at a preset temperature; the second cooling liquid circulating pump with PTC heater all closes, fourth governing valve, fifth governing valve and first governing valve all open, the second governing valve with the third governing valve all closes, first cooling liquid circulating pump opens, and high temperature coolant passes through first cooling liquid pipeline and fourth cooling liquid pipeline and flows through the warm braw water tank, rethread fifth cooling liquid pipeline flows through first cooling liquid circulating pump and obtains low temperature coolant, and low temperature coolant passes through third cooling liquid pipeline flows through power module, absorbs power module's heat back becomes high temperature coolant, and high temperature coolant rethread first cooling liquid pipeline and fourth cooling liquid pipeline flow to the warm braw water tank.
Compared with the prior art, the electric automobile air conditioning system and the control method thereof provided by the invention have the advantages that the electric automobile air conditioning system comprises the refrigerant loop and the cooling liquid loop, the cooling liquid loop comprises the power module, the heat dissipation module, the thermoelectric generation module and the first cooling liquid circulating pump, the power module is connected with the heat dissipation module through the first cooling liquid pipeline, the heat dissipation module is connected with the first cooling liquid circulating pump through the second cooling liquid pipeline, the first cooling liquid circulating pump is connected with the power module through the third cooling liquid pipeline, and the thermoelectric generation module is positioned between the first cooling liquid pipeline and the second cooling liquid pipeline.
Drawings
FIG. 1 is a block diagram of a coolant loop in an air conditioning system of an electric vehicle according to the present invention;
fig. 2 is a schematic diagram of the air conditioning system of the electric vehicle in the heating mode;
fig. 3 is a schematic diagram of the air conditioning system of the electric automobile in the cooling mode.
Detailed Description
The invention provides an electric automobile air conditioning system and a control method thereof, wherein the electric automobile air conditioning system can fully recycle heat generated by the operation of a power part of an electric automobile, and meanwhile, the power part can be effectively cooled without arranging an independent cooling system, so that the energy consumption is saved, and the cruising ability of the electric automobile is improved.
Referring to fig. 1 and 2, the air conditioning system for an electric vehicle provided by the invention comprises a refrigerant circuit and a cooling liquid circuit, wherein the cooling liquid circuit comprises a power module 100, a heat dissipation module 200, a thermoelectric generation module 300 and a first cooling liquid circulating pump 11, the power module 100 is connected with the heat dissipation module 200 through a first cooling liquid pipeline 11, the heat dissipation module 200 is connected with the first cooling liquid circulating pump 1 through a second cooling liquid pipeline 12, the first cooling liquid circulating pump 1 is connected with the power module 100 through a third cooling liquid pipeline 13, and the thermoelectric generation module 300 is positioned between the first cooling liquid pipeline 11 and the second cooling liquid pipeline 12.
In specific implementation, the power module 100 is turned on to provide power for the operation of the electric vehicle, so as to ensure the normal operation of the electric vehicle, during this process, the power module 100 generates heat, and in order to ensure the normal operation of the power module 100, the first coolant circulation pump 1 is turned on at this time, the first coolant circulation pump 1 is turned on, so that the coolant circulates through the first coolant pipe 11, the second coolant pipe 12 and the third coolant pipe, specifically, the low-temperature coolant in the third coolant pipe 13 may flow through the power module 100 to absorb the heat of the power module 100 and become high-temperature coolant, then the high-temperature coolant is cooled by heat dissipation through the external heat dissipation module 200 by the first coolant pipe 11 and becomes low-temperature coolant, and then the low-temperature coolant flows to the first coolant circulation pump 1 by the second coolant pipe, so as to form a coolant loop; the thermoelectric power generation module 300 can generate power by utilizing the temperature difference formed by the high-temperature cooling liquid in the first cooling liquid pipeline 11 and the low-temperature cooling liquid in the second cooling liquid pipeline 12, so that the power module 100 can be cooled in the process, and meanwhile, the heat generated by the power module 100 is recovered and stored, so that the waste of the heat of the power module 100 can be effectively avoided, and an independent cooling system is not needed to cool the power module 100.
Further, with continued reference to fig. 2, the coolant loop further includes a warm air tank 2, where the warm air tank 2 is connected to the first coolant line 11 through the fourth coolant line 14 and is connected to the third coolant line 13 through a fifth coolant line 15; the fourth cooling liquid pipeline 14 is communicated with the first cooling liquid pipeline 11 through a first regulating valve 41, the first cooling liquid pipeline 11 is further provided with a second regulating valve 42 for regulating the connection state of the power module 100 and the heat dissipation module 200, and the second cooling liquid pipeline 12 is communicated with the fifth cooling liquid pipeline 15 through a third regulating valve 43.
When the electric vehicle air conditioning system is operated in a heating mode in winter, the first regulating valve 41 is opened, the second regulating valve 42 and the third regulating valve 43 are closed, the first coolant circulating pump 1 is started, the low-temperature coolant in the third coolant pipe 13 flows through the power module 100 to absorb the heat of the power module 100 and becomes high-temperature coolant, and the high-temperature coolant flows through the first coolant pipe 11 and the fourth coolant pipe 14 to heat the warm air tank 2 by the warm air tank 2, so that the heat supply in the electric vehicle is realized, and the heat supply of the warm air tank 2 is not detailed herein because the heat supply of the warm air tank 2 is the prior art; then, the cooling liquid heated by the warm air water tank 2 flows to the third cooling liquid pipeline 13 through the fifth cooling liquid pipeline 15, and the cooling liquid is circulated in such a way that the electric automobile air conditioning system can utilize the heat generated by the power module 100 to heat the interior of the automobile in winter, and the cooling function of the power module 100 can be realized at the same time; when the heat of the power module 100 is not needed to be used for heating, the first regulating valve 41 can be closed, the second regulating valve 42 and the third regulating valve 43 can be opened, and the heat of the power module 100 is recycled and stored in combination with the thermoelectric power generation module 300, so that the heat of the power module 100 is effectively prevented from being wasted, and the purpose of saving energy consumption is achieved; meanwhile, compared with a traditional air conditioning system of an electric automobile, the heat of the power module 100 is utilized for heating in the application to replace the PTC heater 3 for heating, so that the use of the PTC heater 3 can be reduced, and the cruising ability of the electric automobile is improved.
Further, the cooling liquid circuit further comprises a PTC heater 3, the PTC heater 3 is connected to the first cooling liquid pipe 11 through a sixth cooling liquid pipe 16, and is connected to the third cooling liquid pipe 13 through a seventh cooling liquid pipe 17, and the sixth cooling liquid pipe 16 is provided with a second cooling liquid circulation pump 4; the first coolant line 11 is further provided with a fourth regulating valve 44, and the third coolant line 13 is provided with a fifth regulating valve 45.
Preferably, the power module 100 in the present embodiment includes a power battery 110, a motor controller 120, and the driving motor 130, and in particular, the PTC heater 3 is connected to the first coolant pipe 11 through the sixth coolant pipe 16, and the PTC heater 3 is connected to the third coolant pipe 13 through the seventh coolant pipe 17, such that the PTC heater 3 is connected in parallel to both ends of the power battery 110; the motor controller 120 is connected to the first cooling fluid pipe 11 through a ninth cooling fluid pipe 19 and to the third cooling fluid pipe 13 through a tenth cooling fluid pipe 20, and the driving motor 130 is connected to the first cooling fluid pipe 11 through an eleventh cooling fluid pipe 21 and to the third cooling fluid pipe 13 through a twelfth cooling fluid pipe 22.
In this embodiment, when the electric vehicle air conditioning system works in winter, the temperature of the power battery 110 is too low, which affects the discharge of the battery, so that the PTC heater 3 needs to be heated, specifically, at this time, the fourth regulating valve 44 and the fifth regulating valve 45 are closed, the second coolant circulating pump 4 and the PTC heater 3 are started, the coolant in the seventh coolant pipe 17 flows through the PTC heater 3, then flows through the power battery 110 through the ninth coolant pipe 19, heats the power battery 110 and then flows to the PTC heater 3 through the seventh coolant pipe 17, and circulates in this way, the coolant heated by the PTC heater 3 becomes the power battery 110 to be heated, after the power battery 110 reaches the preset working temperature, the PTC heater 3 and the second coolant circulating pump 4 stop working, simultaneously, the fourth regulating valve 44, the fifth regulating valve 45 and the first regulating valve 41 are opened, the coolant in the seventh coolant pipe 17 flows through the PTC heater 3, then flows through the ninth coolant pipe 19, the coolant pipe 13 is further flows through the power battery 110 through the third coolant pipe 13, and then flows through the third coolant pipe 13 to the power battery 11, and then becomes the power battery 110, and the heat is absorbed by the third coolant pump 11, and the heat is changed into the high temperature through the third coolant pipe 120, and the power battery is absorbed by the third coolant pipe 11, and then flows through the third coolant pipe 13, and then flows through the third coolant pipe 11, and is cooled down through the power battery 11, and is cooled; in addition, the low-temperature cooling liquid in the third cooling liquid pipeline 13 further flows through the eleventh cooling liquid pipeline 21 and then flows to the first cooling liquid pipeline 11 through the twelfth cooling liquid pipeline 22 after being changed into high-temperature cooling liquid after being heated by the driving motor 130, then the high-temperature cooling liquid in the first cooling liquid pipeline 11 flows through the warm air water tank 2 and then flows to the first cooling liquid circulating pump 1 through the fifth cooling liquid pipeline 15, so that the cooling liquid after being heated by the warm air water tank 2 flows back to the third cooling liquid pipeline 13 again, and the cooling function of the power battery 110, the motor controller 120 and the driving motor 130 can be realized while the heating in the electric automobile is realized.
Further, the heat dissipation module 200 includes a heat dissipation device 210, the heat dissipation device 210 is connected to the power battery 110 through the first cooling liquid pipeline 11, and is connected to the first cooling liquid circulation pump 1 through the second cooling liquid pipeline 12, the high-temperature cooling liquid in the first cooling liquid pipeline 11 is changed into low-temperature cooling liquid after being cooled by the heat dissipation device 210, the low-temperature cooling liquid flows through the first cooling liquid circulation pump 1 to the cooling liquid pipeline through the second cooling liquid pipeline 12, and because the thermoelectric generation module 300 is arranged between the first cooling liquid pipeline 11 and the second cooling liquid pipeline 12, the thermoelectric generation module 300 generates power through the temperature difference formed by the high-temperature cooling liquid in the first cooling liquid pipeline 11 and the low-temperature cooling liquid in the second cooling liquid pipeline 12, so that the recovery and storage of heat in the power battery 110, the motor controller 120 and the driving motor 130 are realized, and energy is saved.
Preferably, the heat dissipation module 200 includes a cooling metal conduction block 220, the heat sink 210 is connected to the cooling metal conduction block 220 through the first cooling liquid pipeline 11, and is connected to the cooling metal conduction block 220 through the eighth cooling liquid pipeline 18, the cooling metal conduction block 220 is further connected to the first cooling liquid circulation pump 1 through the second cooling liquid pipeline 12, when the high-temperature cooling liquid in the first cooling liquid pipeline 11 passes through the heat sink 210 to perform heat dissipation to complete the first cooling, the cooling liquid flows through the second cooling liquid pipeline 12 after passing through the cooling metal conduction block 220 for the second cooling, and the temperature difference between the high-temperature cooling liquid in the first cooling liquid pipeline 11 and the low-temperature cooling liquid in the second cooling liquid pipeline 12 is made to be greater through the two cooling liquid pipelines, so that the power generation effect of the power generation sheet is better.
Still preferably, the thermoelectric power generation module 300 includes a thermoelectric power generation sheet, the thermoelectric power generation sheet is located between the first cooling liquid pipeline 11 and the second cooling liquid pipeline 12, when the electric vehicle air conditioning system is in a process of refrigerating in summer, the cooling liquid in the cooling liquid loop can absorb the heat generated by the power battery 110, the motor controller 120 and the driving motor 130, and then form a temperature difference in the first cooling liquid pipeline 11 and the second cooling liquid pipeline 12, and the thermoelectric power generation sheet is utilized to generate power, so that the recovery and the storage of the waste heat are realized.
Further, the refrigerant circuit comprises a compressor 5, a condenser 6, an expansion valve 7, an evaporator 8 and a receiver drier 9, the compressor 5 is connected to the condenser 6 by a first refrigerant line 31, the condenser 6 is connected to the expansion valve 7 by a second refrigerant line 32, the expansion valve 7 is connected to the evaporator 8, the expansion valve 7 is further connected to the cold metal conductive block 220 by a third refrigerant line 33, the cold metal conductive block 220 is further connected to the receiver drier 9 by a fourth refrigerant line 34, the receiver drier 9 is further connected to the compressor 5 by a fifth refrigerant line 35, preferably the expansion valve 7 is an electronic expansion valve 7 or a thermal expansion valve 7; the evaporator 8 is a tube-type evaporator 8, a belt tube type evaporator 8 or a laminated evaporator 8.
Referring to fig. 3, when the air conditioning system of the electric vehicle enters a cooling mode in summer, the refrigerant circuit is opened to perform air conditioning and cooling, meanwhile, the first regulating valve 41 and the third regulating valve 43 in the cooling liquid circuit are closed, and the second regulating valve 42, the fourth regulating valve 44 and the fifth regulating valve 45 are opened, so that the circulation of the cooling liquid is realized by starting the first cooling liquid circulating pump 1, and further, the cooling of the power battery 110, the motor controller 120 and the driving motor 130 and the heat recovery of the power battery 110, the motor controller 120 and the driving motor 130 are completed; when the electric vehicle air conditioning system enters a heating mode in winter, the refrigerant loop is closed, the fourth regulating valve 44 and the fifth regulating valve 45 in the cooling liquid loop are opened, the second cooling liquid circulating pump 4 is opened, after the PTC heater 3 works to heat the power battery 110, the fourth regulating valve 44, the fifth regulating valve 45 and the first regulating valve 41 are opened, the second regulating valve 42 and the third regulating valve 43 are closed, the first cooling liquid circulating pump 1 is opened, the heating function of the air conditioner is completed by utilizing the heat of the power battery 110, the motor controller 120 and the driving motor 130, the use of the PTC heater 3 is reduced, and the endurance of the electric vehicle is improved.
The invention also correspondingly provides a control method of the air conditioning system of the electric automobile, which specifically comprises two working modes, namely a refrigerating mode and a heating mode, wherein in the refrigerating mode, the refrigerant loop works, the first regulating valve 41 and the third regulating valve 43 in the cooling liquid loop are closed, and the second regulating valve 42, the fourth regulating valve 44 and the fifth regulating valve 45 are opened; the first cooling liquid circulation pump 1 is turned on, the low-temperature cooling liquid is changed into high-temperature cooling liquid after being absorbed by the power module 100 through the third cooling liquid pipeline 13, the high-temperature cooling liquid flows through the radiator 210 for the first time through the first cooling liquid pipeline 11, then flows through the cold metal conduction block 220 for the second time to be cooled into low-temperature cooling liquid, and the low-temperature cooling liquid flows to the third cooling liquid pipeline 13 through the second cooling liquid pipeline 12, so that the waste heat recovery of the power module 100 is completed in a circulating mode.
In the heating mode, the refrigerant loop is closed, the fourth regulating valve 44 and the fifth regulating valve 45 in the cooling liquid loop are closed, the second cooling liquid circulating pump 4 is opened, the PTC heater 3 is opened, the cooling liquid in the sixth cooling liquid pipeline 16 and the seven cooling liquid pipeline is heated, and the obtained high-temperature cooling liquid is circulated through the second cooling liquid circulating pump 4 to heat the power module 100, so that the power module 100 reaches the preset temperature for working; the second cooling liquid circulating pump 4 and the PTC heater 3 are all closed, the fourth regulating valve 44, the fifth regulating valve 45 and the first regulating valve 41 are all opened, the second regulating valve 42 and the third regulating valve 43 are all closed, the first cooling liquid circulating pump 1 is opened, the high-temperature cooling liquid flows through the warm air water tank 2 through the first cooling liquid pipeline 11 and the fourth cooling liquid pipeline 14, then flows through the first cooling liquid circulating pump 1 through the fifth cooling liquid pipeline 15 to obtain low-temperature cooling liquid, the low-temperature cooling liquid flows through the power module 100 through the third cooling liquid pipeline 13, the heat of the power module 100 is absorbed and then becomes high-temperature cooling liquid, the high-temperature cooling liquid flows through the warm air water tank 2 through the first cooling liquid pipeline 11 and the fourth cooling liquid pipeline 14, and thus the circulation is completed to heat and the waste heat utilization of the power module 100.
In summary, the electric automobile air conditioning system and the control method thereof provided by the invention have the advantages that the electric automobile air conditioning system comprises the refrigerant loop and the cooling liquid loop, the cooling liquid loop comprises the power module, the heat dissipation module, the thermoelectric generation module and the first cooling liquid circulating pump, the power module is connected with the heat dissipation module through the first cooling liquid pipeline, the heat dissipation module is connected with the first cooling liquid circulating pump through the second cooling liquid pipeline, the first cooling liquid circulating pump is connected with the power module through the third cooling liquid pipeline, and the thermoelectric generation module is positioned between the first cooling liquid pipeline and the second cooling liquid pipeline.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (5)
1. The electric automobile air conditioning system is characterized by comprising a refrigerant loop and a cooling liquid loop, wherein the cooling liquid loop comprises a power module, a heat dissipation module, a thermoelectric generation module and a first cooling liquid circulating pump, the power module is connected with the heat dissipation module through a first cooling liquid pipeline, the heat dissipation module is connected with the first cooling liquid circulating pump through a second cooling liquid pipeline, the first cooling liquid circulating pump is connected with the power module through a third cooling liquid pipeline, and the thermoelectric generation module is positioned between the first cooling liquid pipeline and the second cooling liquid pipeline;
the cooling liquid loop also comprises a warm air water tank, wherein the warm air water tank is connected with the first cooling liquid pipeline through a fourth cooling liquid pipeline and is connected with the third cooling liquid pipeline through a fifth cooling liquid pipeline; the fourth cooling liquid pipeline is communicated with the first cooling liquid pipeline through a first regulating valve, the first cooling liquid pipeline is further provided with a second regulating valve used for regulating the connection state of the power module and the heat dissipation module, and the second cooling liquid pipeline is communicated with the fifth cooling liquid pipeline through a third regulating valve;
the cooling liquid loop further comprises a PTC heater, wherein the PTC heater is connected with the first cooling liquid pipeline through a sixth cooling liquid pipeline and is connected with the third cooling liquid pipeline through a seventh cooling liquid pipeline, and the sixth cooling liquid pipeline is provided with a second cooling liquid circulating pump; the first cooling liquid pipeline is further provided with a fourth regulating valve, and the third cooling liquid pipeline is provided with a fifth regulating valve;
the heat dissipation module comprises a radiator, and the radiator is connected with the power module through the first cooling liquid pipeline and is connected with the first cooling liquid circulating pump through the second cooling liquid pipeline;
the heat dissipation module comprises a cold metal conduction block, the heat radiator is connected with the power module through the first cooling liquid pipeline and is connected with the cold metal conduction block through an eighth cooling liquid pipeline, and the cold metal conduction block is also connected with the first cooling liquid circulating pump through the second cooling liquid pipeline;
the thermoelectric generation module comprises thermoelectric generation pieces, and the thermoelectric generation pieces are located between the first cooling liquid pipeline and the second cooling liquid pipeline.
2. The electric vehicle air conditioning system of claim 1, wherein the refrigerant circuit includes a compressor, a condenser, an expansion valve, an evaporator, and a receiver drier, the compressor being connected to the condenser by a first refrigerant line, the condenser being connected to the expansion valve by a second refrigerant line, the expansion valve being connected to the evaporator, the expansion valve also being connected to the cold metal conductive block by a third refrigerant line, the cold metal conductive block also being connected to the receiver drier by a fourth refrigerant line, the receiver drier also being connected to the compressor by a fifth refrigerant line.
3. The electric vehicle air conditioning system of claim 2, characterized in that the expansion valve is an electronic expansion valve or a thermal expansion valve.
4. The electric vehicle air conditioning system of claim 2, wherein the evaporator is a tube-in-tube evaporator, a belt tube evaporator, or a stacked evaporator.
5. A control method based on the electric automobile air conditioning system of claim 2, characterized by comprising a cooling mode and a heating mode: in a refrigeration mode, the refrigerant loop works, the first regulating valve and the third regulating valve in the cooling liquid loop are closed, and the second regulating valve, the fourth regulating valve and the fifth regulating valve are opened; the first cooling liquid circulating pump is started, the low-temperature cooling liquid is changed into high-temperature cooling liquid after the low-temperature cooling liquid passes through the third cooling liquid pipeline and flows through the power module to absorb heat of the power module, the high-temperature cooling liquid passes through the radiator through the first cooling liquid pipeline to cool for the first time, and then passes through the cold metal conducting block to cool for the second time to become low-temperature cooling liquid, and the low-temperature cooling liquid passes through the second cooling liquid pipeline to flow to the third cooling liquid pipeline; when in a heating mode, the refrigerant loop is closed, a fourth regulating valve and a fifth regulating valve in the cooling liquid loop are closed, the second cooling liquid circulating pump is opened, the PTC heater is opened, the cooling liquid in the sixth cooling liquid pipeline and the seven cooling liquid pipelines is heated, high-temperature cooling liquid is obtained and circulated through the second cooling liquid circulating pump to heat the power module, and after the power module works at a preset temperature; the second cooling liquid circulating pump with PTC heater all closes, fourth governing valve, fifth governing valve and first governing valve all open, the second governing valve with the third governing valve all closes, first cooling liquid circulating pump opens, and high temperature coolant passes through first cooling liquid pipeline and fourth cooling liquid pipeline and flows through the warm braw water tank, rethread fifth cooling liquid pipeline flows through first cooling liquid circulating pump and becomes low temperature coolant, and low temperature coolant passes through third cooling liquid pipeline flows through power module, absorbs power module's heat back becomes high temperature coolant, and high temperature coolant rethread first cooling liquid pipeline and fourth cooling liquid pipeline flow extremely the warm braw water tank.
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| CN113978250A (en) * | 2021-11-16 | 2022-01-28 | 一汽解放汽车有限公司 | Vehicle-mounted heat management system and vehicle |
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