CN114216284A - Control method of temperature management system of vehicle and temperature management system - Google Patents
Control method of temperature management system of vehicle and temperature management system Download PDFInfo
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- CN114216284A CN114216284A CN202111436146.7A CN202111436146A CN114216284A CN 114216284 A CN114216284 A CN 114216284A CN 202111436146 A CN202111436146 A CN 202111436146A CN 114216284 A CN114216284 A CN 114216284A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000003507 refrigerant Substances 0.000 claims abstract description 69
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- B60H1/00357—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
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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
- B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
- B60H1/00499—Heat or cold storage without phase change including solid bodies, e.g. batteries
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Abstract
The invention relates to the technical field of temperature management, and particularly provides a control method of a temperature management system of a vehicle and the temperature management system. The temperature management system comprises an air conditioner, an auxiliary heat exchanger, a fan and a battery, wherein the auxiliary heat exchanger is connected between a condenser and an evaporator of the air conditioner in series, the auxiliary heat exchanger is arranged close to the battery, the fan is arranged between the auxiliary heat exchanger and the battery, and the control method comprises the following steps: acquiring a current operation mode of the air conditioner; and selectively controlling the fan to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode. With this arrangement, when the air conditioner is operated in the cooling mode, the temperature of the battery can be lowered by the auxiliary heat exchanger; in addition, when the air conditioner runs in a heating mode, the fan is controlled to blow air towards the auxiliary heat exchanger, heat emitted by the battery is blown to the auxiliary heat exchanger, heat recovery is carried out, the temperature of refrigerant entering the condenser can be increased, the frequency of the compressor is reduced, and energy and electricity are saved.
Description
Technical Field
The invention relates to the technical field of temperature management, and particularly provides a control method of a temperature management system of a vehicle and the temperature management system.
Background
Global energy crisis is getting more and more serious, phenomena such as oil panic and gas shortage appear in many areas, and new energy automobiles must be vigorously developed to deal with the crisis, so that the occupation ratio of electric automobiles is getting higher and higher, and the core technology of the electric automobiles lies in battery capacity and service life.
If the battery is in a high-temperature working state for a long time, the service life of the battery can be shortened. However, the cooling effect of the existing vehicle on the battery is not ideal.
Therefore, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems, i.e., solving the problem that the conventional temperature management system for a vehicle has a less than ideal cooling effect on a battery.
In a first aspect, the invention provides a control method for a temperature management system of a vehicle, the temperature management system comprises an air conditioner, an auxiliary heat exchanger, a fan and a battery, the battery is electrically connected with electrical equipment of the vehicle, the air conditioner comprises a compressor, a four-way reversing valve, a condenser and an evaporator, the evaporator is arranged in a cab of the vehicle, the auxiliary heat exchanger is arranged close to the battery so as to cool the battery, the fan is arranged between the auxiliary heat exchanger and the battery, an exhaust port of the compressor is communicated with a first port of the four-way reversing valve, a return port of the compressor is communicated with a second port of the four-way reversing valve, one end of the condenser is communicated with a third port of the four-way reversing valve, and the other end of the condenser is communicated with one end of the auxiliary heat exchanger, the other end of the auxiliary heat exchanger is communicated with one end of the evaporator through a first refrigerant pipeline, the other end of the evaporator is communicated with a fourth port of the four-way reversing valve through a second refrigerant pipeline, and the control method comprises the following steps: acquiring a current operation mode of the air conditioner; selectively controlling the fan to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode.
In a preferable embodiment of the control method of the temperature management system of the vehicle, the step of selectively controlling the fan to blow air toward the battery or blow air toward the auxiliary heat exchanger according to the current operation mode specifically includes: and if the current operation mode is a heating mode, controlling the fan to blow towards the auxiliary heat exchanger.
In a preferable aspect of the control method of the temperature management system of the vehicle described above, the step of "selectively controlling the fan to blow air toward the battery or blow air toward the auxiliary heat exchanger according to the current operation mode" further includes: and if the current operation mode is a cooling mode, controlling the fan to blow air towards the battery.
In a preferable technical solution of the control method of the temperature management system of the vehicle, the temperature management system further includes a third refrigerant line, a first electronic control valve and a second electronic control valve, one end of the third refrigerant line is communicated with the other end of the auxiliary heat exchanger, the other end of the third refrigerant line is communicated with the second refrigerant line, the first electronic control valve is disposed on the first refrigerant line so as to control an on-off state of the first refrigerant line, and the second electronic control valve is disposed on the third refrigerant line so as to control an on-off state of the third refrigerant line, and the control method further includes: judging whether the cab needs to be cooled or not under the condition that the battery needs to be cooled through the auxiliary heat exchanger; and selectively opening the first electric control valve or the second electric control valve according to the judgment result.
In a preferable embodiment of the control method of the vehicle temperature management system, the step of "selectively opening the first electrically controlled valve or the second electrically controlled valve according to the determination result" specifically includes: and if the cab is judged not to be cooled, opening the second electric control valve.
In a preferable aspect of the control method of a temperature management system of a vehicle, the step of "selectively opening the first electronically controlled valve or the second electronically controlled valve according to a determination result" further includes: and if the cab is judged to need to be cooled, opening the first electric control valve.
In a preferable technical solution of the control method of the temperature management system of the vehicle, the first electric control valve and the second electric control valve are solenoid valves or electronic expansion valves.
In a preferable embodiment of the control method of the temperature management system of the vehicle, in a process of cooling the battery by the auxiliary heat exchanger, the control method further includes: acquiring the temperature of the battery; and adjusting the frequency of the compressor according to the temperature and the set target temperature.
In a preferred embodiment of the control method of the vehicle temperature management system, the step of "adjusting the frequency of the compressor according to the temperature and the set target temperature" includes: calculating a difference between the temperature and the set target temperature; and carrying out PID adjustment on the frequency of the compressor according to the difference value.
In a second aspect, the invention also provides a temperature management system comprising a controller configured to be able to perform the control method described above.
Under the condition of adopting the technical scheme, the temperature management system comprises an air conditioner, an auxiliary heat exchanger, a fan and a battery, wherein the battery is electrically connected with electrical equipment of a vehicle, the air conditioner comprises a compressor, a four-way reversing valve, a condenser and an evaporator, the evaporator is arranged in a cab of the vehicle, the auxiliary heat exchanger is arranged close to the battery so as to cool the battery, the fan is arranged between the auxiliary heat exchanger and the battery, an exhaust port of the compressor is communicated with a first port of the four-way reversing valve, a gas return port of the compressor is communicated with a second port of the four-way reversing valve, one end of the condenser is communicated with a third port of the four-way reversing valve, the other end of the condenser is communicated with one end of the auxiliary heat exchanger, the other end of the auxiliary heat exchanger is communicated with one end of the evaporator through a first refrigerant pipeline, the other end of the evaporator is communicated with a fourth port of the four-way reversing valve through a second refrigerant pipeline, the control method comprises the following steps: acquiring a current operation mode of the air conditioner; and selectively controlling the fan to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode. Through the arrangement, an auxiliary heat exchanger is additionally arranged near the battery, the auxiliary heat exchanger is communicated with an air conditioner of a vehicle and is connected between the condenser and the evaporator in series, when the air conditioner operates in a refrigeration mode, high-temperature and high-pressure refrigerant discharged from the compressor flows through the condenser firstly, the refrigerant is throttled from the condenser and then becomes a low-temperature and low-pressure gas-liquid two-phase state, and then when the refrigerant flows through the auxiliary heat exchanger, heat is absorbed, so that the temperature near the auxiliary heat exchanger is reduced, the battery is cooled, the cooling effect on the battery can be improved, and meanwhile, low-temperature air is blown to the battery through the fan, so that the temperature of the battery is reduced; in addition, the fan can be used for judging whether to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode of the air conditioner in the operation process of the air conditioner, specifically, when the air conditioner operates in a cooling mode, the fan is controlled to rotate in the forward direction, low-temperature air near the auxiliary heat exchanger is blown towards the battery, the temperature of the battery is reduced, and when the air conditioner operates in a heating mode, the fan is controlled to rotate in the reverse direction, heat emitted by the battery is blown towards the auxiliary heat exchanger, heat recovery is carried out, the temperature of refrigerant entering a condenser can be increased, the frequency of a compressor is reduced, and energy and electricity are saved.
Further, the temperature management system of the vehicle of the present invention further includes a third refrigerant pipeline, a first electronic control valve and a second electronic control valve, one end of the third refrigerant pipeline is communicated with the bottom end of the auxiliary heat exchanger, the other end of the third refrigerant pipeline is communicated with the second refrigerant pipeline, the first electronic control valve is disposed on the first refrigerant pipeline so as to control the on-off state of the first refrigerant pipeline, the second electronic control valve is disposed on the third refrigerant pipeline, and the second electronic control valve is used for controlling the on-off state of the third refrigerant pipeline, and the control method of the present invention further includes: under the condition that the battery needs to be cooled through the auxiliary heat exchanger, judging whether the cab needs to be cooled or not; and selectively opening the first electric control valve or the second electric control valve according to the judgment result. Through such setting, when need not cooling down the driver's cabin, can only open the second automatically controlled valve, first automatically controlled valve still keeps the closure state, does not have the refrigerant to flow through the evaporimeter, can avoid causing the influence to the temperature of driver's cabin, promotes user's use and experiences.
Still further, the step of "adjusting the frequency of the compressor according to the temperature and the set target temperature" specifically includes: calculating the difference between the temperature and the set temperature; and performing PID adjustment on the frequency of the compressor according to the difference value. Through such setting, can carry out developments, quick and accurate the regulation to the frequency of compressor to can manage the temperature of battery more effectively.
In addition, the temperature management system further provided on the basis of the technical scheme has the technical effects of the control method due to the adoption of the control method, and compared with the temperature management system before improvement, the temperature management system of the vehicle can effectively reduce the temperature of the battery, prolong the service life of the battery and improve the use experience of a user.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a first embodiment of a vehicle temperature management system of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a vehicle temperature management system of the present invention;
FIG. 3 is a flow chart of a control method of the temperature management system of the vehicle of the present invention;
fig. 4 is a flowchart of an embodiment of a control method of a temperature management system of a vehicle of the present invention.
List of reference numerals:
1. a compressor; 2. a condenser; 3. an evaporator; 4. an auxiliary heat exchanger; 5. a battery; 6. a fan; 7. a four-way reversing valve; 71. a first port; 72. a second port; 73. a third port; 74. a fourth port; 8. a gas-liquid separator; 91. a first refrigerant line; 92. a second refrigerant line; 93. a third refrigerant line; 101. a first electrically controlled valve; 102. a second electrically controlled valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms "top", "bottom", "left", "right", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, 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 invention. 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 invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The problem that the existing temperature management system of the vehicle has a poor cooling effect on the battery is pointed out based on the background technology. The invention provides a control method of a temperature management system of a vehicle and the temperature management system, and aims to cool a battery through an air conditioner of the vehicle so as to improve the cooling effect of the battery.
Referring first to fig. 1 and 2, wherein fig. 1 is a schematic structural diagram of a first embodiment of a vehicle temperature management system of the present invention; fig. 2 is a schematic structural diagram of a second embodiment of the vehicle temperature management system of the present invention.
As shown in fig. 1 and 2, the temperature management system of a vehicle of the present invention includes an air conditioner, an auxiliary heat exchanger 4, a battery 5, and a fan 6, wherein the air conditioner includes a compressor 1, a condenser 2, an evaporator 3, and a four-way selector valve 7 connected, and the evaporator 3 is disposed in a cab of the vehicle; the battery 5 is electrically connected with electrical appliances of the vehicle; the auxiliary heat exchanger 4 is arranged close to the battery 5 so as to cool the battery 5; the fan 6 is positioned between the auxiliary heat exchanger 4 and the battery 5, an exhaust port of the compressor 1 is communicated with a first port 71 of the four-way reversing valve 7, a return port of the compressor 1 is communicated with a second port 72 of the four-way reversing valve 7, one end of the condenser 2 is communicated with a third port 73 of the four-way reversing valve 7, the other end of the condenser 2 is communicated with one end of the auxiliary heat exchanger 4, the other end of the auxiliary heat exchanger 4 is communicated with one end of the evaporator 3 through a first refrigerant pipeline 91, and the other end of the evaporator 3 is communicated with a fourth port 74 of the four-way reversing valve 7 through a second refrigerant pipeline 92.
Through adding an auxiliary heat exchanger 4 near battery 5 to communicate auxiliary heat exchanger 4 and the air conditioner of vehicle, concatenate between condenser 2 and evaporimeter 3, when the air conditioner was operated with the refrigeration mode, the high temperature high pressure refrigerant of following compressor 1 exhaust flowed through condenser 2 earlier, the refrigerant becomes low temperature low pressure gas-liquid two-phase state after from condenser 2 throttle, then when flowing through auxiliary heat exchanger 4, absorb the heat, make the temperature near auxiliary heat exchanger 4 reduce, thereby lower the temperature to battery 5, can improve the cooling effect to battery 5, blow low temperature air to battery 5 through fan 6 simultaneously, more be favorable to reducing the temperature of battery 5.
Illustratively, as shown in fig. 1 and 2, the air conditioner further includes a gas-liquid separator 8, the exhaust port of the compressor 1 communicates with the first port 71 of the four-way reversing valve 7, the second port 72 of the four-way reversing valve 7 communicates with one end of the gas-liquid separator 8, the other end of the gas-liquid separator 8 communicates with the return air port of the compressor 1, the left end of the condenser 2 communicates with the third port 73 of the four-way reversing valve 7, the right end of the condenser 2 communicates with the top end of the auxiliary heat exchanger 4, the bottom end of the auxiliary heat exchanger 4 communicates with the top end of the evaporator 3 through a first refrigerant pipe 91, and the bottom end of the evaporator 3 communicates with the fourth port 74 of the four-way reversing valve 7 through a second refrigerant pipe 92.
When the air conditioner operates in a cooling mode, the first port 71 and the third port 73 of the four-way reversing valve 7 are communicated, the second port 72 and the fourth port 74 of the four-way reversing valve 7 are communicated, high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the condenser 2 along a pipeline, the refrigerant is throttled by the condenser 2 and then becomes a low-temperature and low-pressure gas-liquid two-phase state, and then when the refrigerant flows through the auxiliary heat exchanger 4, heat is absorbed, so that the temperature near the auxiliary heat exchanger 4 is reduced, and the fan 6 blows cold air to the battery 5, so that the temperature of the battery 5 is reduced, and the temperature reduction effect of the battery 5 can be improved.
It should be noted that, on the basis of ensuring that the battery 5 can be effectively cooled, the pipeline in the auxiliary heat exchanger 4 can be shorter, so as to reduce the influence on the cooling effect of the cab of the vehicle.
In addition, it should be noted that the air conditioner, that is, the existing air conditioner, may further include some commonly-installed essential elements of the existing air conditioner, such as an electronic expansion valve, besides the compressor 1, the condenser 2, the evaporator 3, the four-way reversing valve 7, and the gas-liquid separator 8, and thus, no further description is provided herein.
Based on the above temperature management system of the vehicle, the present invention further provides a control method of the temperature management system of the vehicle, as shown in fig. 3, the control method of the present invention includes the following steps:
s100: the current operation mode of the air conditioner is obtained.
S200: and selectively controlling the fan to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode.
In the operation process of the air conditioner, whether the fan blows air towards the battery or towards the auxiliary heat exchanger is judged according to the current operation mode of the air conditioner.
Preferably, as shown in fig. 4, the step of selectively controlling the fan to blow air toward the battery or blow air toward the auxiliary heat exchanger according to the current operation mode specifically includes steps S210 and S220.
S210: and if the current operation mode is the heating mode, controlling the fan to blow air towards the auxiliary heat exchanger.
S220: and if the current operation mode is the cooling mode, controlling the fan to blow air towards the battery.
Illustratively, the fan blows air toward the battery when rotating in the forward direction and blows air toward the auxiliary heat exchanger when rotating in the reverse direction.
When the air conditioner runs in a heating mode, the fan is controlled to rotate reversely, heat emitted by the battery is blown to the auxiliary heat exchanger for heat recovery, the temperature of a refrigerant entering the condenser can be increased, the frequency of the compressor is reduced, and energy and electricity are saved.
When the air conditioner runs in a cooling mode, the fan is controlled to rotate in the positive direction, low-temperature air near the auxiliary heat exchanger is blown to the battery, and the temperature of the battery is reduced.
Preferably, as shown in fig. 2, the temperature management system of a vehicle of the present invention further includes a third refrigerant line 93, a first electrically controlled valve 101 and a second electrically controlled valve 102, one end of the third refrigerant line 93 communicates with the bottom end of the auxiliary heat exchanger 4, the other end of the third refrigerant line 93 communicates with the second refrigerant line 92, the first electrically controlled valve 101 is disposed on the first refrigerant line 91 so as to control the on-off state of the first refrigerant line 91, the second electrically controlled valve 102 is disposed on the third refrigerant line 93, and the second electrically controlled valve 102 is used to control the on-off state of the third refrigerant line 93.
The control method of the present invention further includes: under the condition that the battery needs to be cooled through the auxiliary heat exchanger, judging whether the cab needs to be cooled or not; and selectively opening the first electric control valve or the second electric control valve according to the judgment result.
When the battery needs to be cooled through the auxiliary heat exchanger, the air conditioner needs to be refrigerated, and under the condition, whether the cab needs to be cooled is judged, so that whether the first electric control valve or the second electric control valve is opened is selected.
It should be noted that a temperature sensor may be installed in the cab, and whether the cab needs to be cooled is determined according to the temperature in the cab, for example, if the temperature in the cab is greater than a preset temperature, it is determined that the cab needs to be cooled, and otherwise, if the temperature in the cab is not greater than the preset temperature, it is determined that the cab does not need to be cooled; alternatively, the user may be asked whether the user needs to cool the cab by sending a request message to the user, and the like, and such flexible adjustment and change may be performed without departing from the principle and scope of the present invention, and should be limited within the scope of the present invention.
Preferably, the step of selectively opening the first electronic control valve or the second electronic control valve according to the judgment result specifically includes: if the driver's cab is judged not to be cooled, opening a second electric control valve; and if the cab is judged to need to be cooled, opening the first electric control valve.
When it is determined that the temperature of the cab is not required to be lowered, as shown in fig. 2, only the second electronic control valve 102 is opened, and the first electronic control valve 101 remains in the closed state.
The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the condenser 2 along the pipeline, the refrigerant is throttled from the condenser 2 and then becomes a low-temperature and low-pressure gas-liquid two-phase state, then when flowing through the auxiliary heat exchanger 4, the refrigerant absorbs heat, so that the temperature near the auxiliary heat exchanger 4 is reduced, the fan 6 blows cold air to the battery 5, so that the battery 5 is cooled, the refrigerant flowing out of the auxiliary heat exchanger 4 directly flows back to the compressor 1 along the third refrigerant pipeline 93 and the second refrigerant pipeline 92, and no refrigerant flows through the evaporator 3.
When it is determined that the temperature of the cab is not required to be lowered, as shown in fig. 2, only the first electronic control valve 101 is opened, and the second electronic control valve 102 remains closed.
The high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the condenser 2 along the pipeline, the refrigerant is throttled from the condenser 2 and then becomes a low-temperature and low-pressure gas-liquid two-phase state, then when the refrigerant flows through the auxiliary heat exchanger 4, heat is absorbed, so that the temperature near the auxiliary heat exchanger 4 is reduced, the fan 6 blows cold air to the battery 5, the battery 5 is cooled, the refrigerant flowing out of the auxiliary heat exchanger 4 directly flows into the evaporator 3 along the first refrigerant pipeline 91 to cool the cab, and the refrigerant flowing out of the evaporator 3 flows back to the compressor 1 along the second refrigerant pipeline 92.
Preferably, as shown in fig. 2, the first and second electrically controlled valves 101 and 102 are provided as solenoid valves or electronic expansion valves.
Preferably, in the process of cooling the battery through the auxiliary heat exchanger, the control method of the present invention further includes: the frequency of the compressor is adjusted based on the temperature and the set target temperature.
For example, in the process of cooling the battery through the auxiliary heat exchanger, the temperature of the battery can be detected through a temperature sensor arranged on the battery, the temperature sensor can detect the temperature of the battery, the temperature sensor is in communication connection with a controller of a temperature management system so as to transmit data detected by the temperature sensor to the controller, and the controller can adjust the frequency of the compressor according to the temperature of the battery and the set target temperature.
It should be noted that the frequency of the compressor may be adjusted according to the magnitude of the difference between the temperature of the battery and the set target temperature, for example, if the difference between the temperature of the battery and the set target temperature is large, the frequency of the compressor is increased, whereas if the difference between the temperature of the battery and the set target temperature is small, the frequency of the compressor is decreased; alternatively, the frequency of the compressor may be adjusted according to the ratio between the temperature of the battery and the set target temperature, and the like, and such flexible adjustment and change may be performed without departing from the principle and scope of the present invention, and should be limited within the scope of the present invention.
Preferably, the step of "adjusting the frequency of the compressor according to the temperature and the set target temperature" specifically includes: calculating the difference between the temperature and the set temperature; and performing PID (proportion Integration differentiation) adjustment on the frequency of the compressor according to the difference value.
Through such setting, can carry out developments, quick and accurate the regulation to the frequency of compressor to can manage the temperature of battery more effectively.
Illustratively, a calculating unit and a PID adjusting unit are connected in the controller, the calculating unit can calculate the difference value between the temperature of the battery and the set target temperature, and the PID adjusting unit can perform PID adjustment on the frequency of the compressor according to the difference value between the temperature of the battery and the set target temperature.
So far, the technical solutions of the present invention 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 invention 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 invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The control method of the temperature management system of the vehicle is characterized in that the temperature management system comprises an air conditioner, an auxiliary heat exchanger, a fan and a battery, the battery is electrically connected with electrical equipment of the vehicle, the air conditioner comprises a compressor, a four-way reversing valve, a condenser and an evaporator, the evaporator is arranged in a cab of the vehicle, the auxiliary heat exchanger is arranged close to the battery so as to cool the battery, the fan is arranged between the auxiliary heat exchanger and the battery, an exhaust port of the compressor is communicated with a first port of the four-way reversing valve, a return port of the compressor is communicated with a second port of the four-way reversing valve, one end of the condenser is communicated with a third port of the four-way reversing valve, and the other end of the condenser is communicated with one end of the auxiliary heat exchanger, the other end of the auxiliary heat exchanger is communicated with one end of the evaporator through a first refrigerant pipeline, the other end of the evaporator is communicated with a fourth port of the four-way reversing valve through a second refrigerant pipeline, and the control method comprises the following steps:
acquiring a current operation mode of the air conditioner;
selectively controlling the fan to blow air towards the battery or blow air towards the auxiliary heat exchanger according to the current operation mode.
2. The control method according to claim 1, wherein the step of selectively controlling the fan to blow air towards the battery or towards the auxiliary heat exchanger according to the current operation mode specifically comprises:
and if the current operation mode is a heating mode, controlling the fan to blow towards the auxiliary heat exchanger.
3. The control method according to claim 1, wherein the step of selectively controlling the fan to blow air towards the battery or towards the auxiliary heat exchanger according to the current operation mode specifically comprises:
and if the current operation mode is a cooling mode, controlling the fan to blow air towards the battery.
4. The control method according to claim 1, wherein the temperature management system further includes a third refrigerant line, one end of which communicates with the other end of the auxiliary heat exchanger, the other end of which communicates with the second refrigerant line, a first electrically controlled valve provided on the first refrigerant line so as to control the on-off state of the first refrigerant line, and a second electrically controlled valve provided on the third refrigerant line so as to control the on-off state of the third refrigerant line, the control method further comprising:
judging whether the cab needs to be cooled or not under the condition that the battery needs to be cooled through the auxiliary heat exchanger;
and selectively opening the first electric control valve or the second electric control valve according to the judgment result.
5. The control method according to claim 4, wherein the step of selectively opening the first electrically-controlled valve or the second electrically-controlled valve according to the determination result specifically includes:
and if the cab is judged not to be cooled, opening the second electric control valve.
6. The control method according to claim 5, wherein the step of selectively opening the first electrically controlled valve or the second electrically controlled valve according to the determination result further comprises:
and if the cab is judged to need to be cooled, opening the first electric control valve.
7. The control method according to claim 4, wherein the first and second electrically controlled valves are solenoid valves or electronic expansion valves.
8. The control method according to any one of claims 1 to 7, characterized in that, during the cooling of the battery by the auxiliary heat exchanger, the control method further includes:
acquiring the temperature of the battery;
and adjusting the frequency of the compressor according to the temperature and the set target temperature.
9. The control method according to claim 8, wherein the step of "adjusting the frequency of the compressor according to the temperature and the set target temperature" specifically comprises:
calculating a difference between the temperature and the set target temperature;
and carrying out PID adjustment on the frequency of the compressor according to the difference value.
10. A temperature management system comprising a controller, characterized in that the controller is configured to be able to perform the control method of any of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111436146.7A CN114216284A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
| PCT/CN2022/099206 WO2023093002A1 (en) | 2021-11-29 | 2022-06-16 | Control method for temperature management system of vehicle, and temperature management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111436146.7A CN114216284A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
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| CN114216284A true CN114216284A (en) | 2022-03-22 |
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| CN202111436146.7A Pending CN114216284A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
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| CN (1) | CN114216284A (en) |
| WO (1) | WO2023093002A1 (en) |
Cited By (1)
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| WO2023093002A1 (en) * | 2021-11-29 | 2023-06-01 | 青岛海尔空调器有限总公司 | Control method for temperature management system of vehicle, and temperature management system |
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| Publication number | Publication date |
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| WO2023093002A1 (en) | 2023-06-01 |
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