CN108016241B - Heat pump air conditioning system of pure electric vehicle - Google Patents
Heat pump air conditioning system of pure electric vehicle Download PDFInfo
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- CN108016241B CN108016241B CN201810012212.XA CN201810012212A CN108016241B CN 108016241 B CN108016241 B CN 108016241B CN 201810012212 A CN201810012212 A CN 201810012212A CN 108016241 B CN108016241 B CN 108016241B
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- heat exchanger
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- stop
- inlet
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims description 66
- 239000002826 coolant Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 description 33
- 238000007791 dehumidification Methods 0.000 description 13
- 239000000110 cooling liquid Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—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
- B60H1/00271—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
- B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
-
- 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
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/3213—Control means therefor for increasing the efficiency in a vehicle heat pump
Abstract
A heat pump air conditioning system of a pure electric vehicle. The device comprises a compressor, a two-phase stop valve A, a two-phase stop valve B, a stop expansion valve A, a two-phase stop valve C, a three-phase stop valve A, an outdoor heat exchanger, a three-phase stop valve B, a stop expansion valve C, an indoor heat exchanger, a gas-liquid separator, a cooling module and a heat collecting module; the indoor heat exchanger comprises an evaporator and a condenser, the cooling module comprises a battery pack and a stop expansion valve B, and the heat collecting module comprises a water pump, a frequency converter, a motor, a water tank, an expansion water tank and a heat exchanger; the heat collecting module is connected in series between the three-phase stop valve B and the vapor-liquid separator. The full utilization of the heat of the water tank is realized, the battery is protected, the operation is stable, and the space and the cost are saved.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to a heat pump air conditioning system of a pure electric automobile.
Background
Along with the development of economic technology and the increasing of living standard of people, people continuously advocate the requirement of building energy-saving and environment-friendly world, and low-carbon economy becomes a main melody of economic development of China. The pure electric vehicle is a vehicle which uses a vehicle-mounted power supply as power and uses a motor to drive wheels to run and meets various requirements of road traffic and safety regulations. The pure electric vehicle can reduce petroleum consumption and pollution gas emission, and has become an industry which is greatly developed in China, and is gradually paid more attention.
In the field of pure electric vehicles, since no engine water tank provides heat for a heater, what type of heating is adopted by the pure electric vehicle air conditioner becomes a key, and a heat pump air conditioner has been proposed in the market at present as a solution, and compared with PTC heating, the heat pump air conditioner can save electric energy consumption, for example, the invention patent 20162017369. X provides a heat pump air conditioner solution, but when the outdoor temperature of the heat pump air conditioner is lower, the outdoor heat exchanger provides limited heat, and frosting around the heat exchanger may occur, so that the heat exchanger cannot normally run and cannot reach a comfortable temperature. In summer, if the temperature is too high, the working environment of the automobile battery pack is bad, the battery pack needs to be cooled in time, otherwise, the working of the battery pack can be influenced.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a heat pump air conditioning system of a pure electric vehicle, which can solve the defects that when a heat pump air conditioner of the pure electric vehicle is used for heating, the heat energy provided by a heat exchanger is limited, frosting around the heat exchanger possibly occurs, so that the heat exchanger cannot normally run and cannot reach comfortable temperature, if the temperature is too high, the working environment of a battery pack of the vehicle is bad, the battery pack needs to be cooled in time, and otherwise, the working of the battery pack is possibly influenced.
In order to achieve the above purpose, the invention adopts the following technical scheme: the device comprises a compressor, a two-phase stop valve A, a two-phase stop valve B, a stop expansion valve A, a two-phase stop valve C, a three-phase stop valve A, an outdoor heat exchanger, a three-phase stop valve B, a stop expansion valve C, an indoor heat exchanger, a gas-liquid separator, a cooling module and a heat collecting module; the indoor heat exchanger is arranged in an automobile compartment and comprises an evaporator and a condenser, the cooling module comprises a battery pack and a stop expansion valve B, and the heat collecting module comprises a water pump, a frequency converter, a motor, a water tank, an expansion water tank and a heat exchanger; the water pump, the frequency converter, the motor and the water tank are sequentially connected in series, and the expansion water tank is connected with the water tank; the compressor, the two-phase stop valve A, the condenser, the stop expansion valve A, the outdoor heat exchanger, the three-phase stop valve B, the stop expansion valve C, the evaporator and the vapor-liquid separator are sequentially connected in series, the cooling module is connected in parallel with the evaporator and the stop expansion valve C, and the heat collecting module is connected in series between the three-phase stop valve B and the vapor-liquid separator; one end of the two-phase stop valve B is connected with the inflow end of the two-phase stop valve A, and the other end of the two-phase stop valve B is connected with the outlet of the condenser; the stop expansion valve A is of an integrated structure of a stop valve and an expansion valve, an inlet of the stop expansion valve A is connected with an outlet of the condenser, and an outlet of the stop expansion valve A is connected with an inlet of the three-phase stop valve A; one end of the two-phase stop valve C is connected with the outlet end of the stop expansion valve A, and the other end of the two-phase stop valve C is connected with the inlet end of the evaporator; the three-phase stop valve A is in a one-in two-out type, an inlet is connected with an outlet of the stop expansion valve A, an outlet is connected with an inlet of the outdoor heat exchanger, and an outlet is connected with an outlet of the outdoor heat exchanger; the three-phase stop valve B is a first-in and second-out type, an inlet is connected with an outlet of the outdoor heat exchanger, an outlet is connected with an inlet of the expansion stop valve C, and an outlet is connected with an inlet of the heat exchanger; the inlet of the stop expansion valve C is connected with the outlet I of the three-phase stop valve B, and the outlet is connected with the inlet of the evaporator; the inlet of the stop expansion valve B is connected with the inlet end of the stop expansion valve C, and the outlet of the stop expansion valve B is connected with the inlet of the battery pack cooling pipe; the heat exchanger is provided with four ports, wherein the first inlet is connected with the second outlet of the three-phase stop valve B, the first outlet is connected with the second inlet of the vapor-liquid separator, the second inlet is connected with the inlet end of the water tank, and the second outlet is connected with the outlet end of the water tank; the gas-liquid separator is two-in-one-out type, the first inlet is connected with the outlet of the evaporator, the second inlet is connected with the first outlet of the heat exchanger, and the outlet is connected with the inlet of the compressor.
Further, the outdoor heat exchanger is an overcooling type.
Further, the evaporator, condenser or outdoor heat exchanger is parallel flow type.
Further, the stop expansion valve B or the stop expansion valve C is an integrated stop expansion valve.
Further, the heat exchanger is plate-type.
Further, the refrigerant and the cooling liquid in the heat exchanger flow in opposite directions.
Further, the evaporator, condenser and outdoor heat exchanger ports are of the pressure plate type.
Further, a one-way valve is connected in series with the outflow end of the condenser.
The working principle of the invention is as follows: the heat collection of the water tank cooling system is realized by adding the heat collecting module, the cooling module is added to realize the cooling protection of the battery pack, the three-phase stop valve A is added to ensure the normal operation of the whole system, the two-phase stop valve C is added to realize the indoor dehumidification, the problem of insufficient heating of the pure electric automobile in winter is solved, the system can normally operate even in cold areas, the high-temperature protection of the battery pack is realized, and six modes of refrigeration, maximum heating, maximum heating+dehumidification, heating, heating+dehumidification and maximum battery pack cooling can be realized by controlling various valve bodies, so that the requirements of users are met.
After the technical scheme is adopted, the invention has the beneficial effects that: through increasing the heat collecting module, realized the thermal make-up of water tank, practice thrift the electric energy, through increasing cooling module, can realize the cooling function to the battery package, the protection battery is dangerous because the high temperature leads to, has still increased the integral type simultaneously and has cut off the expansion valve, compares in parallelly connected solenoid valve of traditional expansion valve, has the effect of operation stability, saving space and cost. In addition, by adding the three-phase stop valve A, the system can still skip the outdoor heat exchanger to continue to work by utilizing the heat of the water tank under the condition that the outdoor heat exchanger cannot work normally due to the too low temperature. Six modes of refrigeration, maximum heating, maximum heating+dehumidification, heating, heating+dehumidification and maximum battery pack cooling can be switched by controlling the three-phase stop valve, the two-phase stop valve and the stop expansion valve.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a schematic block diagram of the refrigeration mode of the present invention;
FIG. 3 is a schematic block diagram of the maximum heating mode of the present invention;
fig. 4 is a schematic block diagram of the maximum heating+dehumidifying mode of the present invention;
fig. 5 is a schematic block diagram of a heating mode of the present invention;
fig. 6 is a schematic block diagram of a heating+dehumidifying mode of the present invention;
fig. 7 is a schematic block diagram of the maximum battery pack cooling mode of the present invention.
Detailed Description
Referring to fig. 1 to 7, the technical scheme adopted in this embodiment is as follows: the device comprises a compressor, a two-phase stop valve A, a two-phase stop valve B, a stop expansion valve A, a two-phase stop valve C, a three-phase stop valve A, an outdoor heat exchanger, a three-phase stop valve B, a stop expansion valve C, an indoor heat exchanger, a gas-liquid separator, a cooling module and a heat collecting module; the indoor heat exchanger is arranged in an automobile compartment and comprises an evaporator and a condenser, the cooling module comprises a battery pack and a stop expansion valve B, and the heat collecting module comprises a water pump, a frequency converter, a motor, a water tank, an expansion water tank and a heat exchanger; the water pump, the frequency converter, the motor and the water tank are sequentially connected in series, and the expansion water tank is connected with the water tank; the compressor, the two-phase stop valve A, the condenser, the stop expansion valve A, the outdoor heat exchanger, the three-phase stop valve B, the stop expansion valve C, the evaporator and the vapor-liquid separator are sequentially connected in series, the cooling module is connected in parallel with the evaporator and the stop expansion valve C, and the heat collecting module is connected in series between the three-phase stop valve B and the vapor-liquid separator; one end of the two-phase stop valve B is connected with the inflow end of the two-phase stop valve A, and the other end of the two-phase stop valve B is connected with the outlet of the condenser; the stop expansion valve A is of an integrated structure of a stop valve and an expansion valve, an inlet of the stop expansion valve A is connected with an outlet of the condenser, and an outlet of the stop expansion valve A is connected with an inlet of the three-phase stop valve A; one end of the two-phase stop valve C is connected with the outlet end of the stop expansion valve A, and the other end of the two-phase stop valve C is connected with the inlet end of the evaporator; the three-phase stop valve A is in a one-in two-out type, an inlet is connected with an outlet of the stop expansion valve A, an outlet is connected with an inlet of the outdoor heat exchanger, and an outlet is connected with an outlet of the outdoor heat exchanger; the three-phase stop valve B is a first-in and second-out type, an inlet is connected with an outlet of the outdoor heat exchanger, an outlet is connected with an inlet of the expansion stop valve C, and an outlet is connected with an inlet of the heat exchanger; the inlet of the stop expansion valve C is connected with the outlet I of the three-phase stop valve B, and the outlet is connected with the inlet of the evaporator; the inlet of the stop expansion valve B is connected with the inlet end of the stop expansion valve C, and the outlet of the stop expansion valve B is connected with the inlet of the battery pack cooling pipe; the heat exchanger is provided with four ports, wherein the first inlet is connected with the second outlet of the three-phase stop valve B, the first outlet is connected with the second inlet of the vapor-liquid separator, the second inlet is connected with the inlet end of the water tank, and the second outlet is connected with the outlet end of the water tank; the gas-liquid separator is two-in-one-out type, the first inlet is connected with the outlet of the evaporator, the second inlet is connected with the first outlet of the heat exchanger, and the outlet is connected with the inlet of the compressor. The outdoor heat exchanger is an overcooling type. The evaporator, condenser or outdoor heat exchanger is parallel flow type. The stop expansion valve B or the stop expansion valve C is an integral stop expansion valve. The heat exchanger is plate type. The refrigerant and the coolant in the heat exchanger flow in opposite directions. The evaporator, the condenser and the outdoor heat exchanger ports are of a pressing plate type. The outflow end of the condenser is connected with a one-way valve in series.
The heat pump air conditioning system of the pure electric vehicle can realize six modes of refrigeration, maximum heating, maximum heating+dehumidification, heating, heating+dehumidification and maximum battery pack cooling.
The refrigeration mode is shown in fig. 2, wherein arrows in the figure indicate the flow direction of the refrigerant or the cooling liquid, arrows in the water tank cooling system indicate the flow direction of the cooling liquid, and other arrows indicate the flow direction of the refrigerant. In this mode, the two-phase stop valve A is closed, the two-phase stop valve B is opened, the two-phase stop valve C is closed, the stop expansion valve A is completely opened to be a passage, the expansion valve function is not played at this moment, the three-phase stop valve A inlet and the outlet connected with the outdoor heat exchanger are opened, the outlet connected with the outdoor heat exchanger is closed, the inlet of the three-phase stop valve B and the outlet connected with the inlet of the stop expansion valve C are opened, the outlet connected with the heat exchanger is closed, the stop expansion valve B is opened, the expansion valve function is played at this moment, the stop expansion valve C is opened, and the expansion valve function is played at this moment. The compressor compresses low-temperature and low-pressure refrigerant discharged from the vapor-liquid separator into a high-temperature and high-pressure state, the high-temperature and high-pressure refrigerant passes through the outdoor heat exchanger, the outdoor heat exchanger plays a role of a condenser, the high-temperature and high-pressure refrigerant releases a large amount of heat through the outdoor heat exchanger and is converted into low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the stop expansion valve and then passes through the stop expansion valve, the stop expansion valve plays a role of the expansion valve, the low-temperature and high-pressure refrigerant is discharged after passing through the stop expansion valve B and the stop expansion valve C, a large amount of heat is absorbed through evaporation, the purposes of battery pack cooling and indoor cooling are achieved, and the refrigerant mixed by vapor and liquid flowing out of the battery pack and the evaporator enters the vapor-liquid separator and then flows out of the vapor to the compressor. The cooling mode of the whole heat pump system completes one cycle, and in the cooling mode, the cooling of the battery pack can be realized while the indoor cooling is satisfied.
The maximum heating mode is shown in fig. 3, in which arrows indicate the flow direction of the refrigerant or the cooling liquid, arrows indicate the flow direction of the cooling liquid in the tank cooling system, and other arrows indicate the flow direction of the refrigerant. In the mode, the two-phase stop valve A is opened, the two-phase stop valve B is closed, the two-phase stop valve C is closed, the stop expansion valve A is opened, the expansion valve is used at the moment, the three-phase stop valve A is opened at the inlet of the three-phase stop valve A and the outlet of the heat exchanger, the outlet of the heat exchanger is closed, the inlet of the three-phase stop valve B is opened at the outlet of the heat exchanger, the outlet of the heat exchanger C is closed, the high-temperature high-pressure refrigerant passing through the compressor is evaporated by the condenser and becomes low-temperature high-pressure refrigerant, the heat release quantity is increased to room temperature, the low-temperature high-pressure refrigerant flowing out through the condenser passes through the stop expansion valve A, the stop expansion valve A plays a role of an expansion valve at the moment, the refrigerant is evaporated after being sprayed out, the refrigerant enters the heat exchanger to absorb heat, the heat exchanger plays the role of the evaporator at the moment, the medium-temperature low-pressure refrigerant flowing out through the heat exchanger passes through the heat exchanger of the heat collecting block, the heat exchanger is connected into the water tank cooling system of the frequency converter and the motor, the refrigerant in the water tank cooling system is only subjected to heat exchange in the heat exchanger, the refrigerant in the water tank cooling system is not subjected to heat exchange, the refrigerant in the water tank cooling system and the refrigerant is compressed by the high-temperature liquid after passing through the heat collector and the high-pressure gas phase heat exchanger. The maximum heating mode completes one cycle, and heat collection of the water tank cooling system is completed.
The maximum heating and dehumidification mode is shown in fig. 4, wherein arrows in the figure indicate the flow direction of the refrigerant or the cooling liquid, arrows in the water tank cooling system indicate the flow direction of the cooling liquid, and other arrows indicate the flow direction of the refrigerant. In the mode, the two-phase stop valve A is opened, the two-phase stop valve B is closed, the two-phase stop valve C is opened, the stop expansion valve A is opened, the expansion valve is acted at the moment, the inlet of the three-phase stop valve A and the outlet of the outdoor heat exchanger are opened, the outlet of the outdoor heat exchanger is closed, the inlet of the three-phase stop valve B and the outlet of the heat exchanger are opened, the outlet of the stop expansion valve C is closed, high-temperature high-pressure refrigerant passing through the compressor is evaporated by the condenser and becomes low-temperature high-pressure refrigerant, the heat release quantity is increased to room temperature, the low-temperature high-pressure refrigerant flowing out through the condenser passes through the stop expansion valve A, at the moment, the stop expansion valve A plays a role of an expansion valve, a part of refrigerant is sprayed out and enters an evaporator of the indoor heat exchanger to be evaporated, the indoor water vapor is liquefied by cold, the other part of the three-phase stop valve A plays a role of an evaporator to be dehumidified, at the moment, the medium-temperature low-pressure refrigerant passing through the outdoor heat exchanger passes through the heat exchanger to pass through the heat exchanger of the heat collector, the heat exchanger of the heat exchanger is connected to the heat exchanger of the heat exchanger, the low-temperature low-pressure refrigerant flowing out of the heat collector is discharged from the heat exchanger and the heat exchanger, and the refrigerant passes through the heat exchanger and the heat exchanger. The maximum heating and dehumidifying mode completes one cycle, and the purposes of heat collection and indoor dehumidification of the water tank cooling system are achieved.
The heating mode is shown in fig. 5, in which arrows indicate the flow direction of the refrigerant or the coolant, arrows indicate the flow direction of the coolant in the tank cooling system, and other arrows indicate the flow direction of the refrigerant. In the mode, the two-phase stop valve A is opened, the two-phase stop valve B is closed, the two-phase stop valve C is closed, the stop expansion valve A is opened, the expansion valve is operated at the moment, the inlet of the three-phase stop valve A and the outlet of the outdoor heat exchanger are opened, the outlet of the outdoor heat exchanger is opened, the inlet of the three-phase stop valve B and the outlet of the heat exchanger are opened, the outlet of the stop expansion valve C is closed, high-temperature high-pressure refrigerant passing through the compressor is evaporated by the condenser and becomes low-temperature high-pressure refrigerant, the heat release quantity is increased to room temperature, the low-temperature high-pressure refrigerant flowing out through the condenser passes through the stop expansion valve A, at the moment, the stop expansion valve A plays a role of an expansion valve, a part of refrigerant is sprayed out and enters the outdoor heat exchanger to evaporate and absorb heat, at the moment, the other part of the refrigerant directly skips the outdoor heat exchanger to enter the three-phase stop valve B, the medium-temperature low-pressure refrigerant passes through the heat exchanger of the heat collecting module, the heat exchanger is connected to the water tank cooling system of the frequency converter and the motor, only heat exchange occurs in the heat exchanger, the refrigerant in the water tank cooling system is cooled by the heat exchanger, the refrigerant and the refrigerant in the heat tank cooling system and the refrigerant and the refrigerant is not compressed by the heat exchanger after passing through the heat collecting module. The heating mode finishes a cycle, completes heat collection of the water tank cooling system, can fully utilize the heat collection module to collect heat, saves electric energy, and can still continue to operate even when the outdoor heat exchanger is subjected to surface frost or other problems caused by too low temperature, so that the indoor temperature is improved.
The heating and dehumidifying mode is shown in fig. 6, in which arrows indicate the flow direction of the refrigerant or the cooling liquid, arrows indicate the flow direction of the cooling liquid in the tank cooling system, and other arrows indicate the flow direction of the refrigerant. In the mode, the two-phase stop valve A is opened, the two-phase stop valve B is closed, the two-phase stop valve C is opened, the stop expansion valve A is opened, the expansion valve is acted at the moment, the inlet of the three-phase stop valve A and the outlet of the outdoor heat exchanger are opened, the outlet of the outdoor heat exchanger is opened, the inlet of the three-phase stop valve B and the outlet of the heat exchanger are opened, the outlet of the stop expansion valve C is closed, high-temperature high-pressure refrigerant passing through the compressor is evaporated by the condenser and becomes low-temperature high-pressure refrigerant, the heat release quantity is increased to room temperature, the low-temperature high-pressure refrigerant flowing out through the condenser passes through the stop expansion valve A, at the moment, the stop expansion valve A plays a role of expansion valve, the refrigerant is sprayed out, and then has three places, one part of the refrigerant enters the evaporator of the indoor heat exchanger and is liquefied by cooling, the other part of the refrigerant enters the outdoor heat exchanger and absorbs heat by evaporation, the outdoor heat exchanger plays a role of the evaporator, the last part of the outdoor heat exchanger directly skips over the three-phase stop valve B, the medium-temperature low-pressure refrigerant passes through the heat-collecting block, the heat exchanger is connected to the heat exchanger and the heat pump system, the refrigerant flows out of the heat pump and the heat pump system after the refrigerant is cooled by the heat pump and the heat pump is cooled by the heat pump, the heat pump and the heat exchanger is cooled by the heat exchanger, the heat exchange fluid is cooled by the heat pump and the heat exchanger and the heat exchange fluid. The heating and dehumidifying mode completes a cycle, the purposes of heat collection of the water tank cooling system and indoor dehumidification are achieved, the heat collection module can be fully utilized to collect heat, electric energy is saved, and even if the whole heat pump system can still continue to operate when the outdoor heat exchanger has surface frost or other problems caused by too low temperature, the indoor temperature is improved.
The maximum pack cooling mode is shown in fig. 7, where arrows indicate the flow of refrigerant or coolant, arrows in the tank cooling system indicate the flow of coolant, and other arrows indicate the flow of refrigerant. In the mode, the two-phase stop valve A is closed, the two-phase stop valve B is opened, the two-phase stop valve C is closed, the stop expansion valve A is completely opened to be a passage, the expansion valve is not acted at the moment, the inlet of the three-phase stop valve A is opened with the outlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is closed, the inlet of the three-phase stop valve B is opened with the outlet of the heat exchanger, the outlet of the three-phase stop valve C is closed, the stop expansion valve B is opened, the expansion valve function is acted at the moment, and the stop expansion valve C is closed. The compressor compresses low-temperature and low-pressure refrigerant discharged from the vapor-liquid separator into a high-temperature and high-pressure state, the high-temperature and high-pressure liquid refrigerant passes through the outdoor heat exchanger, the outdoor heat exchanger plays a role of a condenser, the high-temperature and high-pressure refrigerant releases a large amount of heat through the outdoor heat exchanger and is converted into low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the stop expansion valve, the stop expansion valve plays a role of the expansion valve at the moment, the low-temperature and high-pressure refrigerant is sprayed out after passing through the stop expansion valve B, and the battery pack cooling pipe is evaporated, so that the battery pack is rapidly cooled. The refrigerant mixed with the gas and the liquid flowing out of the battery pack enters the gas-liquid separator and then flows out of the gas to the compressor. The maximum battery pack cooling module of the whole heat pump system completes a cycle, and in the mode, the battery pack can be rapidly cooled, so that battery scrapping and other problems caused by overhigh temperature around the battery pack can be avoided.
The heat pump air conditioning system of the pure electric vehicle is particularly suitable for the field of pure electric vehicles, heat collection of a water tank cooling system is realized through adding a heat collecting module, cooling protection of a battery pack is realized through adding a cooling module, normal operation of the whole system is guaranteed through adding a three-phase stop valve A, the aim of indoor dehumidification is achieved through adding a two-phase stop valve C, the problem that the pure electric vehicle is insufficient in winter heating is solved, normal operation of the system even in cold areas is guaranteed, high-temperature protection of the battery pack is realized, and six modes of refrigeration, maximum heating, maximum heating+dehumidification, heating, heating+dehumidification and maximum battery pack cooling can be realized through controlling various valve bodies, so that the demands of users are met.
The foregoing is merely illustrative of the present invention and not restrictive, and other modifications and equivalents thereof may occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. A heat pump air conditioning system of a pure electric vehicle is characterized in that: the device comprises a compressor, a two-phase stop valve A, a two-phase stop valve B, a stop expansion valve A, a two-phase stop valve C, a three-phase stop valve A, an outdoor heat exchanger, a three-phase stop valve B, a stop expansion valve C, an indoor heat exchanger, a gas-liquid separator, a cooling module and a heat collecting module; the indoor heat exchanger is arranged in an automobile compartment and comprises an evaporator and a condenser, the cooling module comprises a battery pack and a stop expansion valve B, and the heat collecting module comprises a water pump, a frequency converter, a motor, a water tank, an expansion water tank and a heat exchanger; the water pump, the frequency converter, the motor and the water tank are sequentially connected in series, and the expansion water tank is connected with the water tank; the compressor, the two-phase stop valve A, the condenser, the stop expansion valve A, the outdoor heat exchanger, the three-phase stop valve B, the stop expansion valve C, the evaporator and the vapor-liquid separator are sequentially connected in series, the cooling module is connected in parallel with the evaporator and the stop expansion valve C, and the heat collecting module is connected in series between the three-phase stop valve B and the vapor-liquid separator; one end of the two-phase stop valve B is connected with the inflow end of the two-phase stop valve A, and the other end of the two-phase stop valve B is connected with the outlet of the condenser; the stop expansion valve A is of an integrated structure of a stop valve and an expansion valve, an inlet of the stop expansion valve A is connected with an outlet of the condenser, and an outlet of the stop expansion valve A is connected with an inlet of the three-phase stop valve A; one end of the two-phase stop valve C is connected with the outlet end of the stop expansion valve A, and the other end of the two-phase stop valve C is connected with the inlet end of the evaporator; the three-phase stop valve A is in a one-in two-out type, an inlet is connected with an outlet of the stop expansion valve A, an outlet is connected with an inlet of the outdoor heat exchanger, and an outlet is connected with an outlet of the outdoor heat exchanger; the three-phase stop valve B is a first-in and second-out type, an inlet is connected with an outlet of the outdoor heat exchanger, an outlet is connected with an inlet of the expansion stop valve C, and an outlet is connected with an inlet of the heat exchanger; the inlet of the stop expansion valve C is connected with the outlet I of the three-phase stop valve B, and the outlet is connected with the inlet of the evaporator; the inlet of the stop expansion valve B is connected with the inlet end of the stop expansion valve C, and the outlet of the stop expansion valve B is connected with the inlet of the battery pack cooling pipe; the heat exchanger is provided with four ports, wherein the first inlet is connected with the second outlet of the three-phase stop valve B, the first outlet is connected with the second inlet of the vapor-liquid separator, the second inlet is connected with the inlet end of the water tank, and the second outlet is connected with the outlet end of the water tank; the gas-liquid separator is two-in-one-out type, the first inlet is connected with the outlet of the evaporator, the second inlet is connected with the first outlet of the heat exchanger, and the outlet is connected with the inlet of the compressor.
2. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the outdoor heat exchanger is an overcooling type.
3. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the evaporator, condenser or outdoor heat exchanger is parallel flow type.
4. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the stop expansion valve B or the stop expansion valve C is an integral stop expansion valve.
5. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the heat exchanger is plate type.
6. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the refrigerant and the coolant in the heat exchanger flow in opposite directions.
7. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the evaporator, the condenser and the outdoor heat exchanger ports are of a pressing plate type.
8. The heat pump air conditioning system of a pure electric vehicle according to claim 1, wherein: the outflow end of the condenser is connected with a one-way valve in series.
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| CN201810012212.XA CN108016241B (en) | 2018-01-05 | 2018-01-05 | Heat pump air conditioning system of pure electric vehicle |
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| CN201810012212.XA CN108016241B (en) | 2018-01-05 | 2018-01-05 | Heat pump air conditioning system of pure electric vehicle |
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| CN108016241B true CN108016241B (en) | 2024-01-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108790684A (en) * | 2018-06-04 | 2018-11-13 | 泰铂（上海）环保科技股份有限公司 | A kind of new-energy automobile heat pump air conditioning system and control method |
| CN108489162A (en) * | 2018-06-04 | 2018-09-04 | 泰铂（上海）环保科技股份有限公司 | A kind of new-energy automobile heat pump system |
| CN109080409B (en) * | 2018-09-29 | 2024-04-09 | 重庆超力电器有限责任公司 | Heat pump system, air conditioner and car |
| CN109177689A (en) * | 2018-10-12 | 2019-01-11 | 泰铂（上海）环保科技股份有限公司 | A kind of novel new-energy automobile heat pump air conditioning system |
| CN109747379A (en) * | 2018-12-28 | 2019-05-14 | 大乘汽车有限公司 | Pure electric vehicle Vehicular heat pump system |
| CN109760484B (en) * | 2018-12-29 | 2021-01-05 | 中国科学院广州能源研究所 | Electric automobile thermal management system |
| CN109823138B (en) * | 2019-02-20 | 2024-04-05 | 珠海格力电器股份有限公司 | Vehicle thermal management system and vehicle |
| CN110834514B (en) * | 2019-09-26 | 2021-12-03 | 浙江合众新能源汽车有限公司 | High-use-efficiency heat energy conversion system suitable for electric vehicle |
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