CN115157967A - Simplified pure electric vehicle thermal management system with waste heat recovery function and method - Google Patents
Simplified pure electric vehicle thermal management system with waste heat recovery function and method Download PDFInfo
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- CN115157967A CN115157967A CN202210735828.6A CN202210735828A CN115157967A CN 115157967 A CN115157967 A CN 115157967A CN 202210735828 A CN202210735828 A CN 202210735828A CN 115157967 A CN115157967 A CN 115157967A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 44
- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 8
- 239000003507 refrigerant Substances 0.000 claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 230000017525 heat dissipation Effects 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 55
- 238000007726 management method Methods 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 13
- 238000005457 optimization Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
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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
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3223—Cooling devices using compression characterised by the arrangement or type of the compressor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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- 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
- B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to a simplified pure electric vehicle heat management system with waste heat recovery and a method thereof, wherein the system comprises a built-in refrigerant circulating structure, the built-in refrigerant circulating structure comprises a blower, a high-voltage PTC electric heater, a compressor, an evaporator and an inner condenser which are arranged on a refrigerant circulating pipeline, and an outer heat exchanger which is connected in parallel on the refrigerant circulating pipeline through a heat exchange pipeline; and the waterway circulation structure is connected in series between the built-in refrigerant circulation structure and the external heat exchanger, and the waterway circulation structure is connected in series with waterway circulation pipes of the motor and the battery and used for recovering waste heat so as to realize cooling and heat dissipation of the motor and the battery. The invention recovers the waste heat of the battery and the electrode through the water path circulation structure, can realize high-efficiency heat exchange under the refrigeration and various heating modes of the built-in refrigerant circulation structure, and has high application prospect.
Description
Technical Field
The invention belongs to the technical field of electric vehicle thermal management, and particularly relates to a simplified pure electric vehicle thermal management system with waste heat recovery and a method thereof.
Background
With the gradual popularization of new energy electric vehicles, more and more consumers start to gradually contact the new energy electric vehicles, a heat management system of the new energy electric vehicles is an important system for adjusting the cabin environment and the working environment of automobile parts, and the energy utilization efficiency is comprehensively improved through refrigeration, heating and heat internal conduction;
the thermal management system of the pure electric vehicle comprises an air conditioning system, different parts such as battery cooling and motor heat dissipation are added according to thermal management requirements, the pure electric vehicle is driven by using the energy of the battery to the maximum extent in an auxiliary mode, the heat energy in the vehicle is used for the air conditioning and the battery in the vehicle again by means of carelessness, the energy of the battery can be saved through thermal management to prolong the driving mileage of the vehicle, the advantages of the system are particularly remarkable at extreme cold and hot temperatures, and therefore the system and the method for thermal management of the pure electric vehicle with the simplified waste heat recovery are provided.
Disclosure of Invention
The invention aims to solve the problems and provide a simplified pure electric vehicle thermal management system with waste heat recovery and a method thereof.
The invention achieves the above purpose through the following technical scheme:
the pure electric vehicles thermal management system of streamlined area waste heat recovery, including built-in refrigerant cycle structure, built-in refrigerant cycle structure includes air-blower, high voltage PTC electric heater and locates compressor, evaporimeter and the interior condenser on the refrigerant circulation pipeline, still includes:
the external heat exchanger is connected in parallel on the refrigerant circulating pipeline through a heat exchange pipeline; and
the water path circulating structure is connected in series between the built-in refrigerant circulating structure and the external heat exchanger, and the water path circulating structure is connected in series with the water path circulating pipes of the motor and the battery and used for recovering waste heat so as to realize cooling and heat dissipation of the motor and the battery.
As a further optimization scheme of the invention, one end of the compressor is connected with a first heat exchange pipeline which is connected with an electromagnetic valve in series at the outer end of the outer heat exchanger through an external connecting pipe, the other end of the compressor is connected with a heat exchange end of a waterway circulation structure through the external connecting pipe, and the inner condenser is connected with a second heat exchange pipeline which is connected with a heating expansion valve in series at the outer end of the outer heat exchanger through the external connecting pipe which is connected with a one-way valve in series.
As a further optimization scheme of the invention, the refrigerant circulating pipeline is also connected in series with a gas-liquid separator, and the outer end of the gas-liquid separator is connected with a first heat exchange pipeline through a gaseous refrigerant circulating pipeline connected in series with an electromagnetic valve.
As a further optimization scheme of the invention, the second heat exchange pipeline is connected with one end of a third heat exchange pipeline which is connected with a liquid storage tank in series, the other end of the third heat exchange pipeline is connected with an external pipe of an evaporator, the outer end branch of the third heat exchange pipeline is connected with the external pipe of a waterway circulation structure which is connected with an expansion valve in series, and an electromagnetic valve and a refrigeration expansion valve are connected on the external pipe of the evaporator in series.
As a further optimization scheme of the invention, the waterway circulation structure comprises a plate heat exchanger, a five-way reversing valve and a radiator, the outer end of the five-way reversing valve is respectively connected with one end of a motor which is connected with a pump in series and a battery waterway circulation pipe, the other end of the motor and the other end of the battery waterway circulation pipe are respectively connected back to the five-way reversing valve, the battery waterway circulation pipe is connected with external pipes at two ends of the plate heat exchanger in series, a branch pipe of a three-way water valve is connected on the battery waterway circulation pipe in series, the other end of the branch pipe is connected with the external pipe at one end of the plate heat exchanger, a three-way valve is arranged at one end of the motor waterway circulation pipe which is connected back to the five-way reversing valve, one end of a radiating circulation pipe which is connected with the radiator is connected with the outer end of the five-way reversing valve, and the other end of the radiating circulation pipe is connected with the three-way valve.
According to the pure electric vehicle heat management method of the simplified pure electric vehicle heat management system with waste heat recovery, the cooling medium flowing out of the built-in cooling medium circulation structure exchanges heat with the outer heat exchanger through the heat exchange pipeline and then flows back to the built-in cooling medium circulation structure to complete cooling/heating/dehumidifying operation, and meanwhile, waste heat generated by the motor and the battery recovered by the water path circulation structure is absorbed and utilized in the cooling/heating/dehumidifying operation process to complete heat dissipation and cooling of the battery/motor.
As a further optimized solution of the present invention, the heating operation is specifically,
under the condition of higher ambient temperature, on one side of the built-in refrigerant circulation structure, the outer heat exchanger serves as an evaporator for use, gaseous refrigerant flows out of the compressor, liquid is separated through the gas-liquid separator and is sent to the outer heat exchanger, after the outer heat exchanger absorbs heat of air and exchanges heat with the gaseous refrigerant, the gaseous refrigerant is cooled and decompressed to be changed into a low-temperature and low-pressure gas-liquid mixture and is sent to the inner condenser, the gas-liquid mixture is liquefied and released heat in the inner condenser, the air blower works to blow heat into a room, and the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
As a further optimized solution of the present invention, the heating operation is specifically,
under the conditions that the environment temperature is slightly low and the motor and/or the battery generate more heat, the water path circulation structure recovers the waste heat generated by the motor and/or the battery to realize the heat dissipation of the motor and/or the cooling of the battery;
the compressor compresses the gaseous refrigerant into high-temperature and high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator, then enters the plate heat exchanger to absorb the waste heat of the motor and/or the battery, and then is sent to the inner condenser, the gaseous refrigerant is liquefied in the inner condenser to release heat, the blower works to blow the heat to the room, and finally the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
As a further optimization scheme of the invention, the heating operation is specifically,
when the ambient temperature is lower, the heat pump heating process is as follows, the water path circulation structure recovers the waste heat generated by the motor and/or the battery to realize the heat dissipation of the motor and/or the cooling of the battery;
on one side of the built-in refrigerant circulation structure, the external heat exchanger is used as an evaporator, a gaseous refrigerant flows out of the compressor, liquid is separated by the gas-liquid separator and sent to the external heat exchanger, and the liquid refrigerant exchanges heat with waste heat of the waterway circulation structure recovery motor and/or the battery and then enters the external heat exchanger;
after the heat of the air is absorbed by the outer heat exchanger and the gaseous refrigerant exchanges heat, the gaseous refrigerant is cooled and depressurized to become a low-temperature and low-pressure gas-liquid mixture, the low-temperature and low-pressure gas-liquid mixture is sent to the inner condenser, the gas-liquid mixture is liquefied and releases heat in the inner condenser, the blower works to blow heat indoors, and the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
The invention has the beneficial effects that:
the pure electric vehicle heat management system combines the built-in refrigerant circulation structure and the water path circulation structure, the water path circulation structure recovers the waste heat generated by the motor and the battery to finish heat dissipation and cooling of the battery/motor, and meanwhile, the waste heat is transferred to the side of the built-in refrigerant circulation structure, so that the full utilization can be realized under refrigeration or multiple heating modes, the heat management efficiency is good, and the application prospect is high.
Drawings
FIG. 1 is a schematic diagram of the piping connections of the thermal management system provided by the present invention;
FIG. 2 is a schematic piping connection diagram of the thermal management system in the cooling mode in embodiment 1 of the present invention;
FIG. 3 is a schematic view of the pipe connection of the thermal management system in the heating mode in embodiment 2 of the present invention;
FIG. 4 is a schematic view of the piping connection of the thermal management system in the heating mode in embodiment 3 of the present invention;
fig. 5 is a schematic diagram of the pipe connection of the thermal management system in the single-motor waste heat recovery heating mode in embodiment 4 of the present invention;
FIG. 6 is a schematic view of the pipe connection of the thermal management system in the heating mode in embodiment 5 of the present invention;
fig. 7 is a schematic view of the pipe connection of the thermal management system in the single-battery waste heat recovery heating mode in embodiment 4 of the present invention.
FIG. 8 is a schematic piping diagram of a thermal management system in a heating mode in accordance with embodiment 6 of the present invention;
in the figure: 1. a compressor; 2. an external heat exchanger; 3. an internal condenser; 4. a high voltage PTC electric heater; 5. an evaporator; 6. a blower; 7. a plate heat exchanger; 8. a five-way reversing valve; 9. a heat sink; 10. a refrigeration expansion valve; 11. a heating expansion valve; 12. a gas-liquid separator; 13. a three-way water valve.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown in fig. 1, the invention discloses a simplified pure electric vehicle thermal management system with waste heat recovery, which comprises a built-in refrigerant circulation structure, wherein the built-in refrigerant circulation structure comprises a blower 6, a high-voltage PTC electric heater 4, a compressor 1, an evaporator 5 and an inner condenser 3 which are arranged on a refrigerant circulation pipeline, and an outer heat exchanger 2 which is connected in parallel on the refrigerant circulation pipeline through a heat exchange pipeline; and the waterway circulation structure is connected in series between the built-in refrigerant circulation structure and the external heat exchanger 2, and the waterway circulation structure is connected in series with waterway circulation pipes of the motor and the battery and used for recovering waste heat so as to realize cooling and heat dissipation of the motor and the battery.
The outer end of the compressor 1 is respectively connected with a first heat exchange pipeline with an electromagnetic valve connected in series at one end of the outer heat exchanger 2 and a heat exchange end of a waterway circulation structure through an external pipe, and one end of the inner condenser 3 is connected with a second heat exchange pipeline with a heating expansion valve 11 connected in series at the other end of the outer heat exchanger 2 through an external pipe with a one-way valve connected in series.
And the refrigerant circulating pipeline is also connected in series with a gas-liquid separator 12, and the outer end of the gas-liquid separator 12 is connected with the first heat exchange pipeline through a gaseous refrigerant circulating pipeline connected in series with an electromagnetic valve.
The second heat exchange pipeline is connected with an external pipe of a waterway circulation structure, wherein the external pipe is connected with an expansion valve in series, the third heat exchange pipeline is connected with the external pipe of the evaporator 5 in series, and the electromagnetic valve and the refrigeration expansion valve 10 are connected on the external pipe of the evaporator 5 in series.
The water path circulation structure comprises a plate type heat exchanger 7, a five-way reversing valve 8 and a radiator 9, wherein the outer end of the five-way reversing valve 8 is connected with one end of a motor and a battery water path circulation pipe which are connected with a pump in series respectively, the other end of the motor and the other end of the battery water path circulation pipe are connected back to the five-way reversing valve 8 respectively, the battery water path circulation pipe is connected with external pipes at two ends of the plate type heat exchanger 7 in series, a branch pipe of a three-way water valve 13 is connected on the battery water path circulation pipe in series, the other end of the branch pipe is connected with an external pipe at one end of the plate type heat exchanger 7, a three-way valve is arranged at one end of the motor water path circulation pipe connected back to the five-way reversing valve 8, one end of a heat dissipation circulation pipeline externally connected with the radiator 9 is connected to the outer end of the five-way reversing valve 8, and the other end of the heat dissipation circulation pipeline is connected with the three-way valve.
Example 1
As shown in fig. 2, in the cooling mode, one end of the internal condenser 3 is in an unconnected state through an external connecting pipe connected in series with a one-way valve, a branch pipe connected in series with a three-way water valve 13 on a battery water path circulating pipe, and the outer end of the gas-liquid separator 12 is in an unconnected state through a gaseous refrigerant circulating pipeline connected in series with a solenoid valve and a refrigerant circulating pipeline between the compressor 1 and the internal condenser 3;
on one side of the built-in refrigerant circulating structure, the outer heat exchanger 2 is used as a condenser, the compressor 1 compresses a gaseous refrigerant into a high-temperature high-pressure gaseous state, the gaseous refrigerant is sent to the outer heat exchanger 2 through a heat exchange pipeline for cooling, the gaseous refrigerant is changed into a medium-temperature high-pressure liquid refrigerant after being cooled, the medium-temperature liquid refrigerant is decompressed by the heating expansion valve 11 to be changed into a low-temperature low-pressure gas-liquid mixture, one path of the gaseous refrigerant is sent to the evaporator 5 through a third heat exchange pipeline, the evaporator 5 absorbs heat in air to be vaporized into a gaseous state, then the gaseous refrigerant returns to the compressor 1 to be continuously compressed, the air-conditioning refrigeration is continuously carried out in a circulating way, and the other path of the gaseous refrigerant is sent to the waterway circulating structure;
on one side of the waterway circulation structure, circulating water is pumped to the motor waterway circulation pipe to exchange heat with the motor to realize motor heat dissipation, the circulating water with raised temperature after heat exchange is sent to a heat dissipation circulation pipeline externally connected with a radiator 9 through the motor waterway circulation pipe, the radiator 9 exchanges heat with the circulating water and generates heat to the air, the cooled circulating water is reversed through a five-way reversing valve 8 and then enters the battery waterway circulation pipe to exchange heat with a battery to realize battery cooling, the circulating water after heat exchange and temperature rise enters a plate type heat exchanger 7 to exchange heat with the side of the built-in refrigerant circulation structure, and the circulating water is cooled and then flows back to the five-way reversing valve 8 and then is pumped to the motor waterway circulation pipe to realize secondary waterway circulation.
In the cooling and dehumidifying mode, as shown in fig. 8, the difference from fig. 2 is that the waterway circulation structure is not communicated with the built-in refrigerant circulation structure, and the two sides operate independently.
Example 2
As shown in fig. 3, in the heating mode, the third heat exchange pipeline is not connected to the plate heat exchanger 7 and the external connecting pipe of the evaporator 5, the refrigerant circulation pipeline between the compressor 1 and the internal evaporator 5 is also not connected, and the branch pipe connected to the three-way water valve 13 in series on the battery water path circulation pipeline is connected.
When the environment temperature is higher, on one side of the internal refrigerant circulation structure, the external heat exchanger 2 serves as an evaporator 5 for use, the compressor 1 compresses a gaseous refrigerant into a high-temperature high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator 12, the gaseous refrigerant is sent to the external heat exchanger 2 through the gaseous refrigerant circulation pipeline and the first heat exchange pipeline, the gaseous refrigerant is cooled and then changed into a medium-temperature high-pressure liquid refrigerant, the medium-temperature liquid refrigerant is subjected to pressure reduction by the heating expansion valve 11 and then changed into a low-temperature low-pressure gas-liquid mixture, one path of the medium-temperature low-pressure gas-liquid mixture is sent to the internal condenser 3 through the second heat exchange pipeline, the gaseous refrigerant returns to the compressor 1 through the refrigerant circulation pipeline, the gaseous refrigerant is liquefied and releases heat in the internal condenser 3, the blower 6 works to blow heat indoors, the heating process is completed, and the high-voltage PTC electric heater 4 is arranged on one side of the internal condenser 3 to assist in heating, so that the indoor temperature is ensured to be proper.
Example 3
As shown in fig. 4, in the heating mode, the second heat exchange pipeline and the external pipe of the outer end of the compressor 1, and the third heat exchange pipeline and the external pipe of the evaporator 5 are all in an unconnected state, a branch pipe of the battery waterway circulation pipe, which is connected in series with the three-way water valve 13, is in an connected state, and a refrigerant circulation pipeline between the compressor 1 and the inner evaporator 5 is also in an unconnected state;
when the environmental temperature is lower, the heat pump heating process is as follows, on one side of the waterway circulation structure, circulating water is pumped to the motor waterway circulation pipe to exchange heat with the motor to realize heat dissipation of the motor, the circulating water with increased temperature after heat exchange is sent to a heat dissipation circulation pipeline externally connected with a heat sink 9 through the motor waterway circulation pipe, the heat sink 9 exchanges heat with the circulating water and generates heat to the air, the cooled circulating water is reversed through a five-way reversing valve 8 and then enters a battery waterway circulation pipe to exchange heat with a battery to realize battery cooling, the circulating water after heat exchange and temperature rise enters a plate heat exchanger 7 and then is transferred to the side of the built-in refrigerant circulation structure, the circulating water is cooled and then flows back to the five-way reversing valve 8 and then is pumped to the motor waterway circulation pipe to realize secondary waterway circulation;
on one side of the internal refrigerant circulation structure, the difference from embodiment 2 is that a third heat exchange pipeline is connected with an external end of a plate heat exchanger 7, a compressor 1 compresses a gaseous refrigerant into a high-temperature and high-pressure gas state, the gaseous refrigerant is separated from liquid by a gas-liquid separator 12, then the gas refrigerant is sent to an external heat exchanger 2 through a gaseous refrigerant circulation pipeline and a first heat exchange pipeline, one path of the gaseous refrigerant is sent to an internal condenser 3 through a second heat exchange pipeline, finally the gaseous refrigerant returns to the compressor 1 through a refrigerant circulation pipeline, the gaseous refrigerant is liquefied and released heat in the internal condenser 3, a blower 6 works to blow heat indoors to complete a heating process, the liquid refrigerant separated by the gas-liquid separator 12 is gasified into a gas state through the plate heat exchanger 7 and a water path circulation structure, and then enters the external heat exchanger 2 through the third heat exchange pipeline to further absorb heat for gasification and then is sent to the internal condenser 3 through the second heat exchange pipeline to be liquefied and released heat, and simultaneously the external heat exchanger 2 absorbs heat of air.
Example 4
As shown in fig. 5 and 7, the first heat exchange pipeline and the second heat exchange pipeline outside the outer heat exchanger 2 are not communicated with the built-in refrigerant circulation structure, the gaseous refrigerant circulation pipeline is not connected with the first heat exchange pipeline, the third heat exchange pipeline and the external pipe of the evaporator 5 are not communicated, the refrigerant circulation pipeline between the compressor 1 and the inner evaporator 5 is also not communicated, the radiator 9 and the five-way reversing valve 8 are also not communicated, and the refrigerant circulation pipeline between the compressor 1 and the inner evaporator 5 is also not communicated;
as shown in fig. 5, the branch pipe connected in series with the three-way water valve 13 on the battery water path circulation pipe is in the on state, and as shown in fig. 7, the branch pipe connected in series with the three-way water valve 13 on the battery water path circulation pipe is in the off state.
When the environmental temperature is low, the heating process when the motor/battery generates more heat is as follows, on one side of the waterway circulation structure, circulating water is pumped to the battery/motor waterway circulation pipe to exchange heat with the motor/battery to realize the heat dissipation of the motor/battery, and the circulating water with the raised temperature enters the plate heat exchanger 7 after heat exchange to realize the recovery of the waste heat of the motor/battery;
on one side of the built-in refrigerant circulation structure, the compressor 1 compresses a gaseous refrigerant into a high-temperature and high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator 12, enters the plate heat exchanger 7 to absorb waste heat of the motor/battery, is sent to the inner condenser 3 through the second heat exchange pipeline, and finally returns to the compressor 1 through the refrigerant circulation pipeline, the gaseous refrigerant is liquefied in the inner condenser 3 to release heat, and the blower 6 works to blow heat indoors, so that the heating process is completed.
Example 5
As shown in fig. 6, the first heat exchange pipeline outside the external heat exchanger 2 is communicated with the built-in refrigerant circulation structure, the gaseous refrigerant circulation pipeline is connected with the first heat exchange pipeline, the branch pipe of the battery waterway circulation pipe, which is connected with the three-way water valve 13 in series, is in a connected state, and the radiator 9 and the five-way reversing valve 8 are also in an unconnected state.
When the ambient temperature is slightly lower, the heating process when the motor generates more heat is as follows, and the specific operation of recovering the motor waste heat at one side of the water path circulation structure is the same as that of the embodiment 4 about recovering the motor waste heat;
the compressor 1 compresses gaseous refrigerant into high-temperature and high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator 12 and then is sent to the outer heat exchanger 2 through a gaseous refrigerant circulation pipeline and a heat exchange pipeline, one path of the gaseous refrigerant is sent to the inner condenser 3 through a second heat exchange pipeline, and finally is returned to the compressor 1 through a refrigerant circulation pipeline, the gaseous refrigerant is liquefied and released heat in the inner condenser 3, the blower 6 works to blow heat to the indoor to finish the heating process, and the liquid refrigerant separated by the gas-liquid separator 12 enters the outer heat exchanger 2 through the plate heat exchanger 7 and the waste heat of the motor and a third heat exchange pipeline to further absorb heat and gasify and then is sent to the inner condenser 3 through the second heat exchange pipeline to be liquefied and released heat, and meanwhile, the outer heat exchanger 2 absorbs the heat of air.
Example 6
As shown in fig. 8, the difference from embodiment 4 lies in that a branch pipe of a battery water path circulating pipe, which is connected in series with a three-way water valve 13, is in an unconnected state, and a radiator 9 and a five-way reversing valve 8 are also in an unconnected state;
when the environment temperature is low and the motor and the battery generate more heat, the heating scheme is as follows, on one side of the waterway circulation structure, circulating water is pumped to the battery and the motor waterway circulation pipe to exchange heat with the motor and the battery to realize the heat dissipation of the motor and the battery, and the circulating water with the raised temperature after heat exchange enters the plate type heat exchanger 7 to realize the recovery of the waste heat of the motor and the battery;
on one side of the built-in refrigerant circulation structure, the compressor 1 compresses a gaseous refrigerant into a high-temperature and high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator 12, enters the plate heat exchanger 7 to absorb waste heat of the motor and the battery, is sent to the inner condenser 3 through the second heat exchange pipeline, and finally returns to the compressor 1 through the refrigerant circulation pipeline, the gaseous refrigerant is liquefied in the inner condenser 3 to release heat, and the blower 6 works to blow heat indoors to complete the heating process.
Example 7
In the dehumidification operation in the multiple heating modes disclosed in embodiments 2 to 6, the heating process is the specific process disclosed in embodiments 2 to 6, under the dehumidification operation, refrigerant circulation pipelines between the heat exchange pipeline No. three and the external connection pipe of the evaporator 5 and between the compressor 1 and the evaporator 5 are all in a connected state, and under the heating mode, the evaporator 5 is used as a heat exchanger, and air in the cockpit is condensed into water through the evaporator 5 and then discharged through a drain pipe, so that the effect of drying the air in the cockpit is achieved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The pure electric vehicles thermal management system of simplified type area waste heat recovery, including built-in refrigerant cycle structure, built-in refrigerant cycle structure includes air-blower, high voltage PTC electric heater and locates compressor, evaporimeter and interior condenser on the refrigerant circulation pipeline, its characterized in that still includes:
the external heat exchanger is connected in parallel on the refrigerant circulating pipeline through a heat exchange pipeline; and
the water path circulating structure is connected in series between the built-in refrigerant circulating structure and the external heat exchanger, and the water path circulating structure is connected in series with the water path circulating pipes of the motor and the battery and used for recovering waste heat so as to realize cooling and heat dissipation of the motor and the battery.
2. The streamlined pure electric vehicle thermal management system with waste heat recovery of claim 1, wherein: one end of the compressor is connected with a first heat exchange pipeline which is connected with an electromagnetic valve in series at the outer end of the outer heat exchanger through an external pipe, the other end of the compressor is connected with a heat exchange end of the waterway circulation structure through the external pipe, and the inner condenser is connected with a second heat exchange pipeline which is connected with a heating expansion valve in series at the outer end of the outer heat exchanger through an external pipe which is connected with a one-way valve in series.
3. The streamlined pure electric vehicle thermal management system with waste heat recovery of claim 1, wherein: and the refrigerant circulating pipeline is also connected in series with a gas-liquid separator, and the outer end of the gas-liquid separator is connected with the first heat exchange pipeline through a gaseous refrigerant circulating pipeline connected in series with an electromagnetic valve.
4. The streamlined pure electric vehicle thermal management system with waste heat recovery of claim 1, wherein: the second heat exchange pipeline is connected with one end of a third heat exchange pipeline which is connected with a liquid storage tank in series, the other end of the third heat exchange pipeline is connected with an external pipe of the evaporator, the outer end branch of the third heat exchange pipeline is connected with the external pipe of a waterway circulation structure which is connected with an expansion valve in series, and an electromagnetic valve and a refrigeration expansion valve are connected on the external pipe of the evaporator in series.
5. The streamlined pure electric vehicle thermal management system with waste heat recovery according to claim 1, wherein: the water route circulation structure includes plate heat exchanger, five-way switching-over valve and radiator, the outer end of five-way switching-over valve is connected with the one end that has the motor of pump and battery water route circulating pipe of establishing ties respectively, and the other end of motor and battery water route circulating pipe connects back to on the five-way switching-over valve respectively, battery water route circulating pipe concatenates with the outer pipe in plate heat exchanger's both ends mutually, it has the bleeder of three-way water valve to establish ties on the battery water route circulating pipe to the other end of bleeder links to each other with the outer pipe in plate heat exchanger's one end, the one end that the motor water route circulating pipe connects back the five-way switching-over valve is equipped with the three-way valve, and the one end of the external heat dissipation circulating line of radiator is connected in five-way switching-over valve outer end, and the other end is connected with the three-way valve.
6. The pure electric vehicle thermal management method of the simplified pure electric vehicle thermal management system with waste heat recovery as set forth in any one of claims 1 to 5, is characterized in that: the refrigerant flowing out of the built-in refrigerant circulating structure exchanges heat in the outer heat exchanger through the heat exchange pipeline and then flows back to the built-in refrigerant circulating structure to complete heating operation, and waste heat generated by the motor and the battery recovered by the waterway circulating structure is absorbed and utilized while the heating operation is carried out, so that the battery/motor is cooled in a heat dissipation mode.
7. The simplified pure electric vehicle thermal management method with waste heat recovery according to claim 6, characterized in that: the heating operation is specifically that the heating operation is,
under the condition of higher ambient temperature, on one side of the built-in refrigerant circulation structure, the outer heat exchanger serves as an evaporator for use, gaseous refrigerant flows out of the compressor, liquid is separated through the gas-liquid separator and is sent to the outer heat exchanger, after the outer heat exchanger absorbs heat of air and exchanges heat with the gaseous refrigerant, the gaseous refrigerant is cooled and decompressed to be changed into a low-temperature and low-pressure gas-liquid mixture and is sent to the inner condenser, the gas-liquid mixture is liquefied and released heat in the inner condenser, the air blower works to blow heat into a room, and the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
8. The simplified pure electric vehicle thermal management method with waste heat recovery according to claim 6, characterized in that: the heating operation is specifically that the heating operation is carried out,
under the conditions that the environment temperature is slightly low and the motor and/or the battery generate more heat, the water path circulation structure recovers the waste heat generated by the motor and/or the battery to realize the heat dissipation of the motor and/or the cooling of the battery;
the compressor compresses the gaseous refrigerant into high-temperature and high-pressure gaseous state, the gaseous refrigerant is separated from liquid by the gas-liquid separator, then enters the plate heat exchanger to absorb the waste heat of the motor and/or the battery, and then is sent to the inner condenser, the gaseous refrigerant is liquefied in the inner condenser to release heat, the blower works to blow the heat to the room, and finally the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
9. The streamlined pure electric vehicle thermal management method with waste heat recovery according to claim 6, wherein: the heating operation is specifically that the heating operation is carried out,
when the ambient temperature is lower, the heat pump heating process is as follows, the water path circulation structure recovers the waste heat generated by the motor and/or the battery to realize the heat dissipation of the motor and/or the cooling of the battery;
on one side of the internal refrigerant circulation structure, the external heat exchanger is used as an evaporator, a gaseous refrigerant flows out of the compressor, liquid is separated by the gas-liquid separator and sent to the external heat exchanger, and the liquid refrigerant exchanges heat with waste heat of the water path circulation structure recovery motor and/or the battery and then enters the external heat exchanger;
after the heat of the air is absorbed by the outer heat exchanger and the gaseous refrigerant exchanges heat, the gaseous refrigerant is cooled and depressurized to become a low-temperature and low-pressure gas-liquid mixture, the low-temperature and low-pressure gas-liquid mixture is sent to the inner condenser, the gas-liquid mixture is liquefied and releases heat in the inner condenser, the blower works to blow heat indoors, and the gaseous refrigerant returns to the compressor through the refrigerant circulation pipeline, so that the heating process is completed.
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| CN103158487A (en) * | 2011-12-19 | 2013-06-19 | 杭州三花研究院有限公司 | Automobile air conditioning system |
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| CN113895205A (en) * | 2021-10-11 | 2022-01-07 | 安徽江淮松芝空调有限公司 | Economical heat pump system with waste heat recovery function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103158487A (en) * | 2011-12-19 | 2013-06-19 | 杭州三花研究院有限公司 | Automobile air conditioning system |
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