CN111251811B - Vehicle, vehicle-mounted air conditioning system and control method thereof - Google Patents
Vehicle, vehicle-mounted air conditioning system and control method thereof Download PDFInfo
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- CN111251811B CN111251811B CN201811460078.6A CN201811460078A CN111251811B CN 111251811 B CN111251811 B CN 111251811B CN 201811460078 A CN201811460078 A CN 201811460078A CN 111251811 B CN111251811 B CN 111251811B
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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
- B60H1/00007—Combined heating, ventilating, or cooling devices
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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
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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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
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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
- B60H1/00792—Arrangement of detectors
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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
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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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
- B60H2001/00307—Component temperature regulation using a liquid flow
Abstract
The invention discloses a vehicle, a vehicle-mounted air conditioning system and a control method thereof. The vehicle-mounted air conditioning system comprises a demisting heating device, a compressor, an outdoor heat exchanger, an indoor heat exchanger and a battery pack cooling branch, wherein the compressor, the outdoor heat exchanger and the indoor heat exchanger can flow through a refrigerant, and the compressor, the outdoor heat exchanger and the indoor heat exchanger can be communicated through a first reversing valve to realize the reversing of a refrigerant flow path. The demisting heating device is arranged at the indoor heat exchanger. The battery pack cooling branch is located between the indoor heat exchanger and the outdoor heat exchanger, a first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger, and a second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger. According to the vehicle-mounted air conditioning system, direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, and the temperature of the battery is kept in a proper range by adjusting the first throttling valve and the second throttling valve, so that heating and cooling requirements of a vehicle and a thermal management system of the battery under different working conditions are met.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle, a vehicle-mounted air conditioning system and a control method of the vehicle-mounted air conditioning system.
Background
In order to improve the charge-discharge efficiency of the battery, proper working temperature is required, and the performance and the cruising ability of the battery are greatly influenced by over-high or over-low temperature. In the correlation technique, cool down for the battery through setting up independent cooling channel, in addition, some vehicles combine air conditioning system to control the temperature for the battery, carry out the heat transfer for the coolant liquid of flowing through the battery through air conditioning system to the realization is to the cooling or the intensification of battery. The battery liquid cooling technology is adopted, the structure is complex, the cooling efficiency is low, and the temperature requirement of the battery cannot be met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an on-vehicle air conditioning system, which has the advantages of simple structure and good performance.
The invention further provides a vehicle with the vehicle-mounted air conditioning system.
The invention further provides a control method of the vehicle-mounted air conditioning system.
According to the embodiment of the invention, the vehicle-mounted air conditioning system comprises: a compressor including a suction port and a discharge port; the first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the suction port through a refrigerant pipeline, and the fourth valve port is communicated with the exhaust port through a refrigerant pipeline; one end of the outdoor heat exchanger is communicated with the third valve port through a refrigerant pipeline; one end of the indoor heat exchanger is communicated with one end of a battery pack cooling branch through a refrigerant pipeline, the other end of the battery pack cooling branch is communicated with the other end of the outdoor heat exchanger through a refrigerant pipeline, and the other end of the indoor heat exchanger is communicated with the second valve port through a refrigerant pipeline; the first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger; the second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger; and the demisting heating device is arranged at the indoor heat exchanger.
According to the vehicle-mounted air conditioning system provided by the embodiment of the invention, the battery pack cooling branch is fused into the vehicle-mounted air conditioning system, the indoor heat exchanger is provided with the demisting heating device, and a refrigerant in the vehicle-mounted air conditioning system can flow through the battery pack cooling branch, so that the indoor temperature can be regulated and demisted, and the direct cooling and direct heating regulation of the battery pack cooling branch can be realized, so that the heat exchange efficiency of the battery pack cooling branch can be improved.
According to some embodiments of the invention, when the on-board air conditioning system is in a cooling state, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port; when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.
According to some embodiments of the invention, the on-vehicle air conditioning system further comprises: a first sensor located on a refrigerant line between the first throttle valve and the battery pack cooling branch; the second sensor is positioned on a refrigerant pipeline between the second throttling valve and the battery pack cooling branch; and the electric control device adjusts the opening degrees of the first throttle valve and the second throttle valve according to the parameters acquired by the first sensor and the second sensor.
In some embodiments of the invention, the first sensor is a temperature sensor, a pressure sensor, or a temperature and pressure sensor; the second sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor.
According to some embodiments of the invention, the gas-liquid separator further comprises an inlet and an outlet, the inlet is communicated with the first valve port through a refrigerant pipeline, and the outlet is communicated with the suction port through a refrigerant pipeline.
In some embodiments of the invention, further comprising: the third sensor is arranged on the refrigerant pipeline between the air outlet and the fourth valve port to detect the temperature of the refrigerant pipeline; the fourth sensor is arranged on the refrigerant pipeline between the inlet and the first valve port to detect the temperature of the refrigerant pipeline; the third sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor; the fourth sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor.
According to some embodiments of the invention, further comprising: the second reversing valve comprises a fifth valve port, a sixth valve port, a seventh valve port and an eighth valve port, the fifth valve port is communicated with one end of the battery pack cooling branch through a refrigerant pipeline, the sixth valve port is communicated with the outdoor heat exchanger through a refrigerant pipeline, the seventh valve port is communicated with the indoor heat exchanger through a refrigerant pipeline, and the eighth valve port is communicated with the other end of the battery pack cooling branch through a refrigerant pipeline; the second reversing valve reverses at regular time or according to the temperature of the refrigerant at the inlet and the outlet of the battery pack cooling branch.
In some embodiments of the invention, when the fifth port is in communication with the sixth port, the eighth port is in communication with the seventh port; when the fifth valve port is communicated with the seventh valve port, the eighth valve port is communicated with the sixth valve port.
The vehicle provided by the embodiment of the invention comprises the vehicle-mounted air conditioning system.
According to the vehicle provided by the embodiment of the invention, the battery pack cooling branch is fused into the vehicle-mounted air conditioning system, the refrigerant in the vehicle-mounted air conditioning system can flow through the battery pack cooling branch, and the demisting heating device is arranged at the indoor heat exchanger, so that the indoor temperature can be adjusted and demisted, and the direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, so that the heat exchange efficiency of the battery pack cooling branch can be improved.
According to the control method of the vehicle-mounted air conditioning system of the embodiment of the invention, the vehicle-mounted air conditioning system comprises the following steps: a compressor including a suction port and a discharge port; the first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the suction port through a refrigerant pipeline, and the fourth valve port is communicated with the exhaust port through a refrigerant pipeline; one end of the outdoor heat exchanger is communicated with the third valve port through a refrigerant pipeline; one end of the indoor heat exchanger is communicated with the other end of the outdoor heat exchanger through a refrigerant pipeline and a battery pack cooling branch, and the other end of the indoor heat exchanger is communicated with the second valve port through a refrigerant pipeline; the first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger; the second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger; the demisting heating device is arranged at the indoor heat exchanger; the control method comprises the following steps: when the vehicle-mounted air conditioning system is in a refrigerating state, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the opening degree of the first throttle valve is adjusted to adjust the temperature of the battery; when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, and the opening degree of the second throttle valve is adjusted so as to adjust the temperature of the battery.
According to the control method of the vehicle-mounted air conditioning system provided by the embodiment of the invention, by arranging the vehicle-mounted air conditioning system, on the premise of adjusting the temperature in the vehicle, direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, and the first throttle valve and the second throttle valve are adjusted according to the acquisition values of the first sensor and the second sensor, so that the refrigerant flowing through the battery pack cooling branch can reasonably exchange heat with the battery, the temperature of the battery is kept in a proper range, the service performance of the battery can be further improved, the service life of the battery is prolonged, the system is simple in structure, and the control method is easy to operate.
According to some embodiments of the invention, the vehicle air conditioning system further comprises: a first sensor located on a refrigerant line between the first throttle and the battery pack cooling branch; the second sensor is positioned on a refrigerant pipeline between the second throttling valve and the battery pack cooling branch; a fifth sensor located at the battery; the control method comprises the following steps: when the vehicle-mounted air conditioning system is in a refrigerating state, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the opening degree of the first throttle valve is controlled according to the acquisition values of the first sensor, the second sensor and the fifth sensor so as to adjust the temperature of the battery; when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, and the opening degree of the second throttle valve is controlled according to the acquisition values of the first sensor, the second sensor and the fifth sensor so as to adjust the temperature of the battery.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an on-vehicle air conditioning system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an in-vehicle air conditioning system according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an in-vehicle air conditioning system according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a vehicle according to an embodiment of the invention;
fig. 5 is a flowchart of a control method of an in-vehicle air conditioning system according to an embodiment of the present invention.
Reference numerals:
the air-conditioning system 1, the vehicle 2,
a compressor 10, a suction port 11, an exhaust port 12, a gas-liquid separator 20, an inlet 21, an outlet 22, an indoor heat exchanger 30, an outdoor heat exchanger 40, a defogging heating device 50,
the flow of the first throttle 60, the second throttle 70,
a first direction valve 80, a first valve port 81, a second valve port 82, a third valve port 83, a fourth valve port 84,
a second direction valve 90, a fifth valve port 91, a sixth valve port 92, a seventh valve port 93, an eighth valve port 94,
the number of the cells 100 is such that,
a first sensor 110, a second sensor 120, a third sensor 130, and a fourth sensor 140.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 to 3, the vehicle air conditioning system 1 according to the embodiment of the present invention includes a compressor 10, a first direction changing valve 80, an outdoor heat exchanger 40, an indoor heat exchanger 30, a defogging heating device 50, a battery pack cooling branch, a first throttle valve 60, and a second throttle valve 70.
Specifically, the compressor 10 includes a suction port 11 and a discharge port 12. The first direction valve 80 includes a first port 81, a second port 82, a third port 83, and a fourth port 84, the first port 81 is communicated with the suction port 11 through a refrigerant pipe, and the fourth port 84 is communicated with the discharge port 12 through a refrigerant pipe. The battery pack cooling branch is adapted to exchange heat with the battery 100 to regulate the temperature of the battery 100, and the battery 100 is disposed adjacent to the battery pack cooling branch. For example, battery 100 may be located on a battery pack cooling branch. One end of the outdoor heat exchanger 40 is communicated with the third valve port 83 through a refrigerant pipe. One end of the indoor heat exchanger 30 is communicated with the other end of the outdoor heat exchanger 40 through a refrigerant pipeline and a battery pack cooling branch, and the other end of the indoor heat exchanger 30 is communicated with the second valve port 82 through a refrigerant pipeline. The first throttle valve 60 is disposed on the refrigerant pipe between the battery pack cooling branch and the outdoor heat exchanger 40, and the second throttle valve 70 is disposed on the refrigerant pipe between the battery pack cooling branch and the indoor heat exchanger 30.
The defogging heating devices 50 are provided at the indoor heat exchanger 30. The defogging heating device 50 is disposed near the indoor heat exchanger 30 to achieve defogging and dehumidification performances of the vehicle air conditioning system 1. When in summer, the temperature in the vehicle is high, the vehicle-mounted air conditioning system 1 is started to refrigerate, hot air can condense into water drops when meeting cold, fog is formed, particularly, the hot air can condense into dew on the indoor heat exchanger 30 after meeting the wall surface of the cold indoor heat exchanger 30 near the indoor heat exchanger 30 with lower temperature, the water drops can erode the indoor heat exchanger 30 and influence the heat exchange efficiency of the indoor heat exchanger 30, and the temperature around the indoor heat exchanger 30 can be properly set by the defogging and heating device 50, so that the fog can be prevented from being formed around the indoor heat exchanger 30.
According to the vehicle-mounted air conditioning system 1 provided by the embodiment of the invention, the battery pack cooling branch is fused into the vehicle-mounted air conditioning system 1, the refrigerant in the vehicle-mounted air conditioning system 1 can flow through the battery pack cooling branch, and the demisting heating device 50 is arranged at the indoor heat exchanger 30, so that the indoor temperature can be adjusted and demisted, and the direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, so that the heat exchange efficiency of the battery pack cooling branch can be improved.
According to some embodiments of the present invention, when the vehicle air conditioning system 1 is in a cooling state, the first port 81 is communicated with the second port 82, and the third port 83 is communicated with the fourth port 84; when the on-vehicle air conditioning system 1 is in the heating state, the first port 81 communicates with the third port 83, and the second port 82 communicates with the fourth port 84.
As shown in fig. 1 to 3, according to some embodiments of the present invention, the vehicle air conditioning system 1 may further include a first sensor 110 and a second sensor 120, where the first sensor 110 is located on the refrigerant pipeline between the first throttle valve 60 and the battery pack cooling branch, and the second sensor 120 is located on the refrigerant pipeline between the second throttle valve 70 and the battery pack cooling branch. The first throttle valve 60 and the second throttle valve 70 are adjusted according to the first sensor 110 and the second sensor 120 to realize the thermostatic adjustment of the battery 100. Therefore, the cruising ability of the battery can be improved, and the service life of the battery can be prolonged.
In some embodiments of the present invention, the first sensor 110 may be a temperature sensor, a pressure sensor, or a temperature and pressure sensor. The second sensor 120 may be a temperature sensor, a pressure sensor, or a temperature and pressure sensor. Therefore, the heat exchange quantity of the refrigerant and the battery pack cooling branch can be detected by detecting the pressure value and the temperature value of the refrigerant, so as to control the flow rates of the first throttling valve 60 and the second throttling valve 70.
As shown in fig. 1 to 3, according to some embodiments of the present invention, the vehicle air conditioning system 1 may further include a gas-liquid separator 20, the gas-liquid separator 20 including an inlet 21 and an outlet 22, the inlet 21 communicating with the first valve port 81, and the outlet 22 communicating with the suction port 11. Therefore, the refrigerant gas and the liquid can be separated in the gas-liquid separator 20, so that the liquid refrigerant can be prevented from entering the compressor 10, and the safety performance of the compressor 10 can be improved.
As shown in fig. 1-3, in some embodiments of the present invention, the vehicle air conditioning system 1 may further include a third sensor 130 and a fourth sensor 140, where the third sensor 130 is disposed on the refrigerant pipeline between the air outlet 12 and the fourth port 84, and the fourth sensor 140 is disposed on the refrigerant pipeline between the inlet 21 and the first port 81. Therefore, the third sensor 130 and the fourth sensor 140 may be arranged to detect a pressure value and a temperature value of the refrigerant entering the gas-liquid separator 20 or flowing out of the compressor 10, so that the user may conveniently adjust the first throttle valve 60 or the second throttle valve 70 to make the refrigerant entering the compressor 10 be the superheated refrigerant gas.
In some embodiments of the present invention, the third sensor 130 may be a temperature sensor, a pressure sensor, or a temperature and pressure sensor, and the fourth sensor 140 may be a temperature sensor, a pressure sensor, or a temperature and pressure sensor. Therefore, the state of the refrigerant can be determined by detecting the pressure value and the temperature value of the refrigerant.
According to some embodiments of the present invention, the first reversing valve 80 may be a four-way valve. Thereby, the setup and manufacture of the in-vehicle air conditioning system 1 can be simplified.
According to some embodiments of the present invention, the on-board air conditioning system 1 may further include a second direction valve 90, the second direction valve 90 includes a fifth valve port 91, a sixth valve port 92, a seventh valve port 93 and an eighth valve port 94, the fifth valve port 91 is communicated with one end of the battery pack cooling branch, the sixth valve port 92 is communicated with the outdoor heat exchanger 40 through the first throttle 60, the seventh valve port 93 is communicated with the indoor heat exchanger 30 through the second throttle 70, and the eighth valve port 94 is communicated with the other end of the battery pack cooling branch. The second reversing valve 90 reverses periodically or depending on the temperature of the refrigerant at the battery pack cooling branch inlet and outlet. For example, when the temperature of the battery 100 is higher than the normal operating temperature of the battery 100 and the temperature of one end of the pack cooling branch is higher than the temperature of the other end of the pack cooling branch, the refrigerant may be caused to flow in from one end of the pack cooling branch by adjusting the second direction changing valve 90, and conversely, when the temperature of the battery 100 is higher than the normal operating temperature of the battery 100 and the temperature of the other end of the pack cooling branch is higher than the temperature of one end of the pack cooling branch, the refrigerant may be caused to flow in from the other end of the pack cooling branch by adjusting the second direction changing valve 90.
When the fifth port 91 is communicated with the sixth port 92, the eighth port 94 is communicated with the seventh port 93; when the fifth port 91 communicates with the seventh port 93, the eighth port 94 communicates with the sixth port 92. Therefore, by arranging the second reversing valve 90, the flow direction of the cooling medium flowing through the battery pack cooling branch 100 can be controlled, so that the flow direction of the cooling medium can be controlled according to the temperature at the two ends of the battery, and the temperature at the two ends of the battery can be balanced. Further, the second direction valve 90 may be a four-way valve.
As shown in fig. 4, a vehicle 2 according to an embodiment of the present invention includes the vehicle-mounted air conditioning system 1 as described above.
According to the vehicle 2 provided by the embodiment of the invention, the battery pack cooling branch is fused into the vehicle-mounted air conditioning system 1, the refrigerant in the vehicle-mounted air conditioning system 1 can flow through the battery pack cooling branch, and the demisting heating device 50 is arranged at the indoor heat exchanger 30, so that the indoor temperature can be adjusted and demisted, and the direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, so that the heat exchange efficiency of the battery pack cooling branch can be improved.
According to some embodiments of the invention, the vehicle 2 may be a pure electric vehicle, a hybrid vehicle.
As shown in fig. 5, according to a control method of a vehicle-mounted air conditioning system according to an embodiment of the present invention, the vehicle-mounted air conditioning system includes: a compressor including an air suction port and an air discharge port; the first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the suction port through a refrigerant pipeline, and the fourth valve port is communicated with the exhaust port through a refrigerant pipeline; one end of the outdoor heat exchanger is communicated with the third valve port through a refrigerant pipeline; one end of the indoor heat exchanger is communicated with the other end of the outdoor heat exchanger through a refrigerant pipeline and a battery pack cooling branch, and the other end of the indoor heat exchanger is communicated with the second valve port through a refrigerant pipeline; the first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger; the second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger; the demisting heating device is arranged at the indoor heat exchanger; the first sensor is positioned on a refrigerant pipeline between the first throttling valve and the battery pack cooling branch; the second sensor is positioned on a refrigerant pipeline between the second throttling valve and the battery pack cooling branch; a fifth sensor located at the battery; the control method comprises the following steps: when the vehicle-mounted air conditioning system is in a refrigerating state, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the opening degree of the first throttle valve is controlled according to the acquisition values of the first sensor, the second sensor and the fifth sensor so as to adjust the temperature of the battery; when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, and the opening degree of the second throttle valve is controlled according to the collected values of the first sensor, the second sensor and the fifth sensor so as to regulate the temperature of the battery.
According to the control method of the vehicle-mounted air conditioning system, provided by the embodiment of the invention, on the premise of adjusting the temperature in the vehicle, direct cooling and direct heating adjustment of the battery pack cooling branch can be realized, and the first throttle valve and the second throttle valve are adjusted according to the acquisition values of the first sensor and the second sensor, so that the refrigerant flowing through the battery pack cooling branch can reasonably exchange heat with the battery, the temperature of the battery is kept in a proper range, the service performance of the battery can be further improved, the service life of the battery can be prolonged, the system is simple in structure, and the control method is easy to operate.
According to some embodiments of the invention, the in-vehicle air conditioning system further comprises: the gas-liquid separator comprises an inlet and an outlet, the inlet is communicated with the first valve port, and the outlet is communicated with the air suction port; the fourth sensor is arranged between the inlet and the first valve port, and when the vehicle-mounted air conditioning system is in a refrigerating state, the opening of the second throttle valve is controlled according to the detection information of the fourth sensor so as to adjust the temperature of the indoor heat exchanger; when the vehicle-mounted air conditioning system is in a heating state, the opening of the first throttle valve is controlled according to the detection information of the fourth sensor so as to adjust the temperature of the indoor heat exchanger.
The vehicle-mounted air conditioning system 1 according to the embodiment of the present invention will be described in detail below by taking fig. 1 to 3 as an example.
As shown in fig. 1 to 3, the vehicle air conditioning system 1 according to the embodiment of the present invention includes a compressor 10, a gas-liquid separator 20, an indoor heat exchanger 30, an outdoor heat exchanger 40, a defogging heating device 50, a first throttle valve 60, a second throttle valve 70, a first direction valve 80, a second direction valve 90, a battery pack cooling branch, a first sensor 110, a second sensor 120, a third sensor 130, and a fourth sensor 140.
Specifically, the compressor 10 includes a suction port 11 and an exhaust port 12, the gas-liquid separator 20 includes an inlet 21 and an outlet 22, the first direction valve 80 includes a first valve port 81, a second valve port 82, a third valve port 83, and a fourth valve port 84, the outlet 22 of the gas-liquid separator 20 communicates with the suction port 11 of the compressor 10, and the exhaust port 12 of the compressor 10 communicates with the fourth valve port 84. The third sensor 130 is located between the exhaust port 12 and the fourth port 84. The third sensor 130 detects a temperature and a pressure of the refrigerant discharged from the compressor 10.
The third orifice 83 is communicated with one end of the outdoor heat exchanger 40, the other end of the outdoor heat exchanger 40 is communicated with one end of the battery pack cooling branch, and a first throttle valve 60 is arranged between the outdoor heat exchanger 40 and the battery pack cooling branch. A first sensor 110 is located between the first throttle valve 60 and the battery pack cooling branch. The other end of the battery pack cooling branch is communicated with one end of the indoor heat exchanger 30, a second throttle valve 70 is arranged between the battery pack cooling branch 100 and the indoor heat exchanger 30, and the second sensor 120 is located between the battery pack cooling branch and the second throttle valve 70. The other end of the indoor heat exchanger 30 communicates with the second valve port 82, and the first valve port 81 communicates with the inlet 21 of the gas-liquid separator 20. The fourth sensor 140 is located between the first valve port 81 and the gas-liquid separator 20.
When the vehicle-mounted air conditioning system 1 is in a cooling state, the compressor 10 is operated, the first valve port 81 is communicated with the second valve port 82, and the third valve port 83 is communicated with the fourth valve port 84. The opening degree of the first throttle valve 60 is throttle-expanded by reading the values of the first sensor 110 and the second sensor 120, and the opening degree of the second throttle valve 70 is throttle-expanded by reading the value of the fourth sensor 140, to achieve thermostatic regulation of the battery 100 in the vicinity of the pack cooling branch.
The principle is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the outdoor heat exchanger 40 to be condensed and release heat. The following two cases are divided as follows:
1. the temperature value of the first sensor 110 is read by an electric control device arranged in the vehicle, and the opening of the first throttle valve 60 is controlled to throttle by comparing the real-time temperature of the battery 100 with the optimal working temperature, so that the temperature value of the refrigerant entering the battery pack cooling branch is the optimal working temperature of the battery 100 (note that if the temperature of the battery 100 is higher than the optimal working temperature, the refrigerant is used for cooling the battery 100, and if the temperature of the battery 100 is lower than the optimal working temperature, the refrigerant is used for heating the battery 100). The refrigerant flowing out of the battery pack cooling branch is throttled by the second throttle valve 70 and then enters the indoor heat exchanger 30 for heat exchange, and then enters the gas-liquid separator 20 and flows back to the compressor 10, so that a battery 100 direct cooling and direct heating and vehicle interior space refrigeration working condition circulating system is completed.
2. The temperature and the pressure value of the second sensor 120 are read by the electronic control device, the real-time temperature and the optimal working temperature of the battery 100 are compared, the opening of the first throttle valve 60 is controlled to throttle, so that the refrigerant flowing out of the battery pack cooling branch is superheated refrigerant gas (the superheated refrigerant gas is a state when the temperature of the refrigerant is higher than the boiling point), at this time, the second throttle valve 70 is controlled to be fully opened and not throttled, then the refrigerant enters the indoor heat exchanger 30 (the refrigerant does not exchange heat any more), and then the refrigerant enters the gas-liquid separator 20 and flows back to the compressor 10, thereby completing a single cell 100 refrigeration cycle system. The method is applied to the condition of cooling the battery 100 when the battery 100 is inserted into a gun for charging.
When the vehicle air conditioning system 1 is in a heating state, the compressor 10 is operated, the first port 81 is communicated with the third port 83, and the second port 82 is communicated with the fourth port 84. The opening degree of the second throttle valve 70 is controlled by reading the values of the second sensor 120 and the first sensor 110 to perform throttle expansion, and the opening degree of the first throttle valve 60 is controlled by reading the value of the fourth sensor 140 to perform throttle expansion.
The principle is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the indoor heat exchanger 30 to be condensed and release heat. The value of the second sensor 120 is read to control the throttling of the second throttle valve 70 so that the temperature value of the refrigerant entering the battery pack cooling branch is the optimal working temperature of the battery 100 (note: if the temperature of the battery 100 is higher than the optimal working temperature, the refrigerant cools the battery 100, and if the temperature of the battery 100 is lower than the optimal working temperature, the refrigerant heats the battery 100). The refrigerant from the battery pack cooling branch is throttled by the first throttle valve 60 and enters the outdoor heat exchanger 40 for heat exchange. The refrigerant discharged from the outdoor heat exchanger 40 enters the gas-liquid separator 20 and flows back to the compressor 10, thereby completing a direct cooling, direct heating, and indoor heating cycle system of the battery 100.
When the vehicle-mounted air conditioning system 1 is in the dehumidification and defogging state, the defogging heating device 50 is turned on while the vehicle-mounted air conditioning system is in the refrigeration condition.
The defogging heating device 50 may be a PTC (Positive Temperature Coefficient) heater.
It should be noted that, in the embodiment of the present invention, both the first throttle valve 60 and the second throttle valve 70 may be electromagnetic electronic expansion valves, thermostatic expansion valves, or electronic expansion valves; the first sensor 110, the second sensor 120, the third sensor 130, and the fourth sensor 140 may each be a pressure sensor, a temperature sensor, or a temperature and pressure sensor.
In addition, considering the temperature uniformity of the battery, the refrigerant may enter the second reversing valve 90 for reversing before entering the battery pack cooling branch. Specifically, the second reversing valve 90 is connected to the inlet of the battery pack cooling branch, and the reversing of the second reversing valve 90 is controlled by reading the difference between the second sensor 120 and the first sensor 110 (the temperature difference range of the battery 100 is preferably less than 5 ℃), so that the temperature uniformity of the battery 100 in direct cooling and direct heating is optimized. As shown in fig. 3.
The vehicle-mounted air conditioning system 1 is suitable for all vehicle types with requirements on cooling and heating of the whole vehicle and cooling and heating of the battery.
Compared with the prior art, the vehicle-mounted air conditioning system 1 of the embodiment of the invention comprises the following improvements:
1. the invention provides a scheme for combining a battery thermal management system and a heat pump system, and realizes a more economical battery and a vehicle internal thermal management circulation system by using fewer valves and sensors and simpler pipeline arrangement.
2. The invention can cool and heat the battery through the refrigerant of the heat pump system in function, can adapt to the effective utilization of energy under different vehicle conditions, enables the battery to work in a proper temperature range all the time, improves the charging and discharging efficiency, the endurance and the service life of the battery.
3. The invention reasonably controls the working states of the first throttle valve 60 and the second throttle valve 70 by accurately reading the values of the first sensor 110, the second sensor 120, the third sensor 130 and the fourth sensor 140, thereby realizing the requirements of direct cooling and direct heating of the battery and indoor cooling, direct heating and defogging.
4. When the indoor refrigeration is in a working condition, the opening degree of the first throttle valve 60 is reasonably controlled by accurately reading the temperature value of the first sensor 110, so that the temperature of the refrigerant entering the cooling branch of the battery pack is a constant temperature value (the optimal temperature value of the battery), and the temperature control of the battery is realized in a more convenient mode.
5. When the indoor cooling is in the working condition, the opening degree of the first throttle valve 60 is reasonably controlled by accurately reading the temperature value of the second sensor 120, so that the refrigerant entering the indoor heat exchanger 30 is in an overheated state and does not exchange heat any more. Therefore, the single direct cooling working condition of the battery is realized in a more convenient mode.
6. When the indoor heating working condition is met, the opening degree of the second throttle valve 70 is reasonably controlled by accurately reading the temperature value of the second sensor 120, so that the temperature of the refrigerant entering the cooling branch of the battery pack is a constant temperature value (the optimal temperature value of the battery), and the temperature control of the battery is realized in a more convenient mode.
7. The invention can change the circulation direction of the refrigerant in the battery pack cooling branch by the reversing function of the four-way valve, and optimize the temperature uniformity of the heat exchange of the battery pack cooling branch.
8. The invention can control the temperature difference between the refrigerant entering the cooling branch of the battery pack for heat dissipation and the temperature of the battery within a smaller range, and the heat dissipation capacity required by the battery is achieved by increasing the flow, thereby being beneficial to the uniformity of the temperature of the battery.
9. The invention can control the temperature of the refrigerant entering the battery pack cooling branch at a higher temperature, and ensures that the cold plate and the pipeline are evaporated in the battery pack cooling branch without generating condensation.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An on-vehicle air conditioning system, characterized by comprising:
a compressor including a suction port and a discharge port;
the first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the suction port through a refrigerant pipeline, and the fourth valve port is communicated with the exhaust port through a refrigerant pipeline;
one end of the outdoor heat exchanger is communicated with the third valve port through a refrigerant pipeline;
one end of the indoor heat exchanger is communicated with one end of a battery pack cooling branch through a refrigerant pipeline, the other end of the battery pack cooling branch is communicated with the other end of the outdoor heat exchanger, and the other end of the indoor heat exchanger is communicated with the second valve port through a refrigerant pipeline;
the first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger;
the second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger;
the demisting heating device is arranged at the indoor heat exchanger;
the second reversing valve comprises a fifth valve port, a sixth valve port, a seventh valve port and an eighth valve port, the fifth valve port is communicated with one end of the battery pack cooling branch through a refrigerant pipeline, the sixth valve port is communicated with the outdoor heat exchanger through a refrigerant pipeline, the seventh valve port is communicated with the indoor heat exchanger through a refrigerant pipeline, and the eighth valve port is communicated with the other end of the battery pack cooling branch through a refrigerant pipeline;
the second reversing valve reverses at regular time or according to the temperature of the refrigerant at the inlet and the outlet of the battery pack cooling branch.
2. The on-board air conditioning system of claim 1, wherein the first valve port is in communication with the second valve port and the third valve port is in communication with the fourth valve port when the on-board air conditioning system is in a cooling state; when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.
3. The vehicle air conditioning system according to claim 1, further comprising:
a first sensor located on a refrigerant line between the first throttle and the battery pack cooling branch;
the second sensor is positioned on a refrigerant pipeline between the second throttling valve and the battery pack cooling branch;
and the electric control device adjusts the opening degrees of the first throttle valve and the second throttle valve according to the parameters acquired by the first sensor and the second sensor.
4. The on-board air conditioning system of claim 3, wherein the first sensor is a temperature sensor, a pressure sensor, or a temperature and pressure sensor;
the second sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor.
5. The vehicle air conditioning system of claim 1, further comprising a gas-liquid separator, the gas-liquid separator comprising an inlet and an outlet, the inlet being in communication with the first valve port via a refrigerant line, the outlet being in communication with the suction port via a refrigerant line.
6. The vehicle air conditioning system according to claim 5, characterized by further comprising:
the third sensor is arranged on the refrigerant pipeline between the exhaust port and the fourth valve port;
the fourth sensor is arranged on the refrigerant pipeline between the inlet and the first valve port;
the third sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor;
the fourth sensor is a temperature sensor, a pressure sensor or a temperature and pressure sensor.
7. The on-board air conditioning system of claim 1, wherein when the fifth port is in communication with the sixth port, the eighth port is in communication with the seventh port; when the fifth valve port is communicated with the seventh valve port, the eighth valve port is communicated with the sixth valve port.
8. A vehicle characterized by comprising an on-board air conditioning system according to any one of claims 1 to 7.
9. A control method of a vehicle-mounted air conditioning system is characterized in that the vehicle-mounted air conditioning system comprises the following steps:
a compressor including a suction port and a discharge port;
the first reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the suction port through a refrigerant pipeline, and the fourth valve port is communicated with the exhaust port through a refrigerant pipeline;
one end of the outdoor heat exchanger is communicated with the third valve port through a refrigerant pipeline;
one end of the indoor heat exchanger is communicated with the other end of the outdoor heat exchanger through a refrigerant pipeline and a battery pack cooling branch, and the other end of the indoor heat exchanger is communicated with the second valve port through a refrigerant pipeline;
the first throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the outdoor heat exchanger;
the second throttling valve is arranged on a refrigerant pipeline between the battery pack cooling branch and the indoor heat exchanger;
the demisting heating device is arranged at the indoor heat exchanger;
the second reversing valve comprises a fifth valve port, a sixth valve port, a seventh valve port and an eighth valve port, the fifth valve port is communicated with one end of the battery pack cooling branch through a refrigerant pipeline, the sixth valve port is communicated with the outdoor heat exchanger through a refrigerant pipeline, the seventh valve port is communicated with the indoor heat exchanger through a refrigerant pipeline, and the eighth valve port is communicated with the other end of the battery pack cooling branch through a refrigerant pipeline;
the control method comprises the following steps:
when the vehicle-mounted air conditioning system is in a refrigerating state, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the opening degree of the first throttle valve is adjusted to adjust the temperature of the battery;
when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, and the opening degree of the second throttle valve is adjusted so as to adjust the temperature of the battery;
and controlling the second reversing valve to reverse at fixed time or according to the temperature of the refrigerant at the inlet and the outlet of the battery pack cooling branch.
10. The control method of the vehicle-mounted air conditioning system according to claim 9, characterized by further comprising:
a first sensor located on a refrigerant line between the first throttle and the battery pack cooling branch;
the second sensor is positioned on a refrigerant pipeline between the second throttling valve and the battery pack cooling branch;
a fifth sensor located at the battery;
the control method comprises the following steps:
when the vehicle-mounted air conditioning system is in a refrigerating state, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the opening degree of the first throttle valve is controlled according to the acquisition values of the first sensor, the second sensor and the fifth sensor so as to adjust the temperature of the battery;
when the vehicle-mounted air conditioning system is in a heating state, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, and the opening degree of the second throttle valve is controlled according to the acquisition values of the first sensor, the second sensor and the fifth sensor so as to adjust the temperature of the battery.
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| CN201811460078.6A CN111251811B (en) | 2018-11-30 | 2018-11-30 | Vehicle, vehicle-mounted air conditioning system and control method thereof |
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| CN201811460078.6A CN111251811B (en) | 2018-11-30 | 2018-11-30 | Vehicle, vehicle-mounted air conditioning system and control method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070075119A (en) * | 2006-01-12 | 2007-07-18 | 한라공조주식회사 | Heat pump type air conditioner |
| CN206870788U (en) * | 2017-05-02 | 2018-01-12 | 安徽江淮松芝空调有限公司 | A kind of automobile heat pump air-conditioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013060066A (en) * | 2011-09-12 | 2013-04-04 | Daikin Industries Ltd | Automobile temperature regulation system |
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2018
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070075119A (en) * | 2006-01-12 | 2007-07-18 | 한라공조주식회사 | Heat pump type air conditioner |
| CN206870788U (en) * | 2017-05-02 | 2018-01-12 | 安徽江淮松芝空调有限公司 | A kind of automobile heat pump air-conditioning system |
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