CN117246105A - R290 whole vehicle thermal management system and method for new energy automobile - Google Patents

R290 whole vehicle thermal management system and method for new energy automobile Download PDF

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Publication number
CN117246105A
CN117246105A CN202311170185.6A CN202311170185A CN117246105A CN 117246105 A CN117246105 A CN 117246105A CN 202311170185 A CN202311170185 A CN 202311170185A CN 117246105 A CN117246105 A CN 117246105A
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CN
China
Prior art keywords
water
valve
way
outlet
inlet
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Pending
Application number
CN202311170185.6A
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Chinese (zh)
Inventor
游宇
张明
李丽
张东斌
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Hangzhou Lingdong Automobile Thermal Management Technology Co ltd
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Hangzhou Lingdong Automobile Thermal Management Technology Co ltd
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Priority to CN202311170185.6A priority Critical patent/CN117246105A/en
Publication of CN117246105A publication Critical patent/CN117246105A/en
Pending legal-status Critical Current

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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
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B60H1/32284—Cooling devices using compression characterised by refrigerant circuit configurations comprising two or more secondary circuits, e.g. at evaporator and condenser side
    • 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
    • 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
    • B60H1/00642—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • 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
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention discloses an R290 whole vehicle thermal management system and method for a new energy automobile. According to the invention, a refrigerant outlet of a battery cooler is communicated with a refrigerant inlet of an electric compressor, the refrigerant outlet of the electric compressor is communicated with a refrigerant inlet of a water-cooling condenser, the refrigerant outlet of the water-cooling condenser is communicated with a refrigerant inlet of a liquid storage tank, the refrigerant outlet of the liquid storage tank is communicated with the refrigerant inlet of the battery cooler, and an electronic expansion valve is arranged at the refrigerant inlet of the battery cooler. The invention adopts the R290 thermal management system, has good thermal characteristics and strong low-temperature heating capacity, and reduces the attenuation of low-temperature endurance mileage; the invention optimizes the refrigerant loop, realizes the minimization of the refrigerant filling quantity, and ensures the safety of the system; the invention isolates the refrigerant loop from the passenger cabin, thereby further ensuring the safety of the system.

Description

R290 whole vehicle thermal management system and method for new energy automobile
Technical Field
The invention belongs to the field of thermal management systems, and particularly relates to an R290 whole-vehicle thermal management system and method for a new energy automobile.
Background
The requirements of energy conservation and emission reduction in the current society are increasing. A refrigerant commonly used in the current automotive air conditioner is R134a, and this refrigerant GWP (global warming potential) is 1300, which is a greenhouse gas, and is gradually limited in use. Meanwhile, when R134a is used as a medium in a new energy automobile heat pump air conditioner, the low-temperature performance is poor, the applicability is poor, the efficiency is low when the heat pump air conditioner is used in the environment below-10 ℃, the system is unstable, the PTC of a heating device is often needed to assist, the low-temperature energy consumption is high, and the problem of continuous voyage attenuation of the low-temperature environment exists. It is therefore desirable to find a refrigerant with a low GWP value and high thermodynamic characteristics to replace.
The refrigerant currently studied to a large extent is R744 (CO 2 ) The GWP of the refrigerant is 1, and the refrigerant is a natural working medium which is completely environment-friendly, but CO 2 The system pressure is very high, the requirement on the whole manufacturing process of the system is high, the refrigeration efficiency under the high-temperature working condition is low, the existing system is incompatible, redesign and development are needed, and the needed cost is high. R290 is also an environment-friendly natural working medium, GWP is 3, the thermal characteristics are excellent, but the combustibility is high, and the environment-friendly natural working medium is A3 type combustible medium, so that hidden danger exists in the system safety during use. There is therefore an urgent need for a thermal management system that is highly safe in the system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an R290 whole vehicle heat management system and method for a new energy vehicle, wherein a loop (a refrigerant loop) where R290 refrigerant is located and a passenger cabin are isolated, the refrigerant loop is optimized to minimize the filling quantity of the R290 refrigerant, a six-way valve and two water-water heat exchangers are used for realizing battery refrigeration and heating, the safety is improved, the controllability is high, a radiator is shared with an electric drive, the evaporation and condensation functions of the radiator are realized through a five-way valve and two three-way valves, the number of the heat exchangers is reduced, the cost is reduced, and a heat management integrated module is formed for the refrigerant loop, the six-way valve, the five-way valve and a refrigeration and heating water pump, so that the pipeline is simplified, the filling quantity is further reduced, and the safety of the system is ensured.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides an R290 whole vehicle heat management system for a new energy vehicle, which comprises an electric compressor, a water-cooled condenser, a liquid storage tank, an electronic expansion valve, a battery cooler, a refrigeration water pump, a six-way valve, an indoor cooler, an indoor heater, a three-way water valve I, a three-way water valve II, a water-water heat exchanger I, a water-water heat exchanger II, a battery water pump, a five-way water valve, a liquid heater, an electric drive water pump, a heating water pump, a front-end radiator and a three-way water valve III.
The refrigerant outlet of the electric compressor is communicated with the refrigerant inlet of the water-cooled condenser, and a temperature pressure sensor is arranged at the refrigerant outlet of the electric compressor; the refrigerant outlet of the water-cooled condenser is communicated with the refrigerant inlet of the liquid storage tank, the refrigerant outlet of the liquid storage tank is communicated with the refrigerant inlet of the battery cooler, and the refrigerant inlet of the battery cooler is provided with an electronic expansion valve; the refrigerant outlet of the battery cooler is communicated with the refrigerant inlet of the electric compressor, and a refrigerant temperature sensor is arranged at the refrigerant outlet of the battery cooler.
The cooling liquid outlet of the heating water pump is communicated with the cooling liquid inlet of the water-cooling condenser, the cooling liquid outlet of the water-cooling condenser is communicated with the cooling liquid inlet of the liquid heater, and the cooling liquid outlet of the liquid heater is communicated with the inlet of the first three-way water valve; the outlet I of the three-way water valve I is communicated with the cooling liquid inlet of the indoor heater and the cooling liquid inlet of the channel I of the water-water heat exchanger I, and an indoor heater inlet temperature sensor is arranged at the cooling liquid inlet of the indoor heater; the cooling liquid outlet of the indoor heater and the cooling liquid outlet of the first channel in the water-water heat exchanger are respectively communicated with the inlet I and the inlet II of the three-way water valve II; and the outlet of the second three-way water valve is communicated with the cooling liquid inlet of the heating water pump.
The cooling liquid outlet of the refrigeration water pump is communicated with the cooling liquid inlet of the battery cooler, the cooling liquid outlet of the battery cooler is communicated with the inlet I of the six-way valve, and a battery cooler outlet temperature sensor is arranged at the cooling liquid outlet of the battery cooler. The outlet of the six-way valve I is communicated with the cooling liquid inlet of the indoor cooler, the outlet of the six-way valve II is communicated with the cooling liquid inlet of the channel I in the water-water heat exchanger II, and the outlet of the six-way valve III, the cooling liquid outlet of the indoor cooler and the cooling liquid outlet of the channel I in the water-water heat exchanger II are communicated with the cooling liquid inlet of the refrigerating water pump.
The cooling liquid outlet of the battery water pump is communicated with the cooling liquid inlet of the second channel in the water-water heat exchanger, the cooling liquid outlet of the second channel in the water-water heat exchanger is communicated with the cooling liquid inlet of the second channel in the first channel of the water-water heat exchanger, and the cooling liquid outlet of the second channel in the first channel of the water-water heat exchanger is communicated with the inlet of the first five-way water valve.
The cooling liquid inlet of the electric drive water pump is communicated with the outlet I of the five-way water valve, and an electric drive water pump outlet temperature sensor is arranged at the cooling liquid outlet of the electric drive water pump; the outlet of the first three-way water valve is communicated with the cooling liquid inlet of the front-end radiator and the inlet of the fifth water valve, the cooling liquid outlet of the front-end radiator is communicated with the inlet of the sixth water valve, the outlet of the sixth water valve is communicated with the inlet of the third three-way water valve, the outlet of the third three-way water valve is communicated with the cooling liquid inlet of the hot water pump, and the outlet of the third three-way water valve is communicated with the inlet of the third five water valve.
Preferably, the six-way valve is formed by connecting a four-way ball valve I, a three-way proportional valve I and a three-way proportional valve II, wherein an inlet of the three-way proportional valve I is communicated with an outlet of the three-way proportional valve II, an inlet of the three-way proportional valve II is communicated with an outlet of the four-way ball valve I, in addition, two outlets of the three-way proportional valve I are respectively used as an outlet II and an outlet III of the six-way valve, the other outlet of the three-way proportional valve II is used as an outlet I of the six-way valve, two inlets of the four-way ball valve I are respectively used as an inlet I and an inlet II of the six-way valve, and the other outlet of the four-way ball valve I is used as an outlet IV of the six-way valve.
Preferably, a blower is arranged at one side of the indoor cooler.
More preferably, an electronic fan is arranged on one side of the front-end radiator.
More preferably, the electric compressor, the temperature pressure sensor, the water-cooled condenser, the liquid storage tank, the electronic expansion valve, the battery cooler, the refrigerant temperature sensor, the refrigeration water pump, the six-way valve, the battery cooler outlet temperature sensor, the blower, the indoor cooler, the indoor heater, the three-way water valve II, the indoor heater inlet temperature sensor, the five-way water valve, the three-way water valve I, the liquid heater, the electric drive water pump outlet temperature sensor, the heating water pump, the front end radiator, the electronic fan and the three-way water valve III form an air conditioner refrigeration heating system; the system comprises an electric compressor, a temperature pressure sensor, a water-cooling condenser, a liquid storage tank, an electronic expansion valve, a battery cooler, a refrigerant temperature sensor, a refrigerating water pump, a six-way valve, a battery cooler outlet temperature sensor, a three-way water valve II, a water-water heat exchanger I, a water-water heat exchanger II, a battery water pump, a power battery inlet temperature sensor, a five-way water valve, a three-way water valve I, a liquid heater, an electric drive water pump outlet temperature sensor, a heating water pump, a front-end radiator, an electronic fan and a three-way water valve III, wherein the electric drive water pump, the heating water pump, the front-end radiator, the electronic fan and the three-way water valve III form a battery loop temperature control system; six-way valve, five-way water valve, electric drive water pump outlet temperature sensor, front end radiator, electronic fan and three-way water valve three constitute electric drive cooling loop system.
More preferably, the electric compressor, the temperature and pressure sensor, the water-cooled condenser, the liquid storage tank, the electronic expansion valve, the battery cooler, the refrigerant temperature sensor, the refrigerating water pump, the six-way valve, the battery cooler outlet temperature sensor, the three-way water valve I and the heating water pump form a thermal management integrated module, and the thermal management integrated module is isolated from the passenger cabin.
More preferably, the electric compressor, the temperature pressure sensor, the water-cooled condenser, the liquid storage tank, the electronic expansion valve, the battery cooler and the refrigerant temperature sensor are connected through a refrigerant pipeline to form a refrigerant loop, and all devices except the refrigerant loop are connected through a cooling liquid pipeline.
The invention discloses a method for performing thermal management on an R290 whole vehicle thermal management system of a new energy vehicle, which comprises the following steps:
the cooling liquid outlet of the power battery is communicated with the cooling liquid inlet of the battery water pump, the cooling liquid inlet of the power battery is communicated with the outlet II of the five-way water valve, a power battery inlet temperature sensor is arranged at the cooling liquid inlet of the power battery, the cooling liquid inlet of the electric drive assembly is communicated with the cooling liquid outlet of the electric drive water pump, and the cooling liquid outlet of the electric drive assembly is communicated with the cooling liquid inlet of the front-end radiator and the inlet II of the five-way water valve; the use modes are as follows:
The air conditioner refrigerating and heating system is provided with the following working modes:
a) Passenger cabin cooling mode: starting the electric compressor, the refrigeration water pump and the heating water pump; the gaseous refrigerant formed after heat exchange with the cooling liquid in the battery cooler reaches the electric compressor to be pressurized, the pressurized gaseous refrigerant is conveyed to the water-cooled condenser to be condensed, the condensed refrigerant passes through the liquid storage tank to reach the electronic expansion valve, and the refrigerant flows back to the battery cooler after being throttled and depressurized by the electronic expansion valve, so that the circulation of a refrigerant loop is completed; the cooling liquid in the battery cooler after heat exchange with the refrigerant enters from the inlet I of the six-way valve, exits from the outlet I of the six-way valve, reaches the indoor cooler, cools the air in the passenger cabin, is then conveyed back into the battery cooler by the refrigerating water pump, and meanwhile, the air blower sends the cool air at the indoor cooler to the passenger cabin, and further cools the passenger cabin; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the front-end radiator, radiates heat to the outside through the electronic fan, then enters from the inlet of the second six-way valve, goes out from the outlet of the fourth six-way valve, enters from the inlet of the third three-way water valve, goes out from the outlet of the third three-way water valve, and finally is conveyed back into the water-cooled condenser by the heating water pump.
b) Air source heat pump heating mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a heating water pump, a refrigerating water pump and an electric drive water pump at the same time; the cooling liquid in the water-cooling condenser after heat exchange with the refrigerant enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, then enters from the inlet of the second three-way water valve, goes out from the outlet of the second three-way water valve, is conveyed by the hot water pump to return water to the cold condenser, and meanwhile, the blower sends hot air at the indoor cooler to the passenger cabin to heat the passenger cabin; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the fourth outlet of the six-way valve, enters from the third inlet of the three-way water valve, exits from the second outlet of the three-way water valve, enters from the third inlet of the five-way water valve, exits from the first outlet of the five-way water valve, is conveyed to the electric drive assembly by the electric drive water pump, enters from the second inlet of the six-way valve through the front end radiator, exits from the third outlet of the six-way valve, and is finally conveyed back into the battery cooler by the refrigeration water pump.
c) Passenger cabin PTC heating mode: the heating water pump is started, the cooling liquid in the water-cooled condenser after heat exchange with the refrigerant reaches the liquid heater to be heated, the heated cooling liquid enters from the inlet of the first three-way water valve, exits from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, enters from the inlet of the second three-way water valve, exits from the outlet of the second three-way water valve, is conveyed by the heating water pump to the water-cooled condenser, and meanwhile, the blower sends hot air at the indoor heater to the passenger cabin to heat the passenger cabin. Wherein, the liquid heater adjusts output power according to the water temperature sensor of the liquid heater.
d) Passenger cabin heating dehumidification mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a refrigeration water pump, an electric drive water pump and a heating water pump; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the first outlet of the six-way valve, reaches the indoor cooler, and is then conveyed back into the battery cooler by the refrigerating water pump; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser reaches the liquid heater for heating, the heated cooling liquid enters from the inlet of the first three-way water valve, exits from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, enters from the inlet of the second three-way water valve, exits from the outlet of the second three-way water valve, is conveyed back into the water-cooled condenser by the heating water pump, and meanwhile, the blower sends hot air at the indoor heater to the passenger cabin, dehumidifies by the indoor cooler and finally reaches the passenger cabin.
The battery loop temperature control system has the following working modes:
a) Battery forced cooling mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a refrigeration water pump, a battery water pump and a heating water pump; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the second outlet of the six-way valve, passes through the first channel of the water-water heat exchanger and is conveyed back into the battery cooler by the refrigeration water pump; the cooling liquid in the second channel of the water-water heat exchanger and the cooling liquid in the first channel of the water-water heat exchanger are subjected to heat exchange, enter from the first inlet of the five-way water valve through the second channel of the water-water heat exchanger, exit from the second outlet of the five-way water valve, reach the power battery, forcedly cool the power battery, and then are conveyed back into the second channel of the water-water heat exchanger by the battery water pump; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the front-end radiator, radiates heat to the outside through the electronic fan, then enters from the inlet of the second six-way valve, goes out from the outlet of the fourth six-way valve, then enters from the inlet of the third three-way water valve, goes out from the outlet of the third three-way water valve, and is conveyed back into the cold condenser by the hot water pump.
b) Natural heat dissipation mode of battery: the battery water pump and the motor water pump are started, cooling liquid in the power battery absorbs heat of the power battery and is conveyed to a channel II of the water-water heat exchanger II by the battery water pump, then enters from an inlet I of the five-way water valve through the channel II of the water-water heat exchanger I, exits from an outlet I of the five-way water valve, is conveyed to the electric drive assembly by the motor water pump, reaches the front end radiator, radiates heat to the outside through the electronic fan, enters from an inlet II of the six-way valve, exits from an outlet IV of the six-way valve, enters from an inlet III of the three-way water valve, exits from an inlet III of the five-way water valve, exits from an outlet II of the five-way water valve, and flows back to the power battery. The vehicle-mounted central control controls the flow of the battery water pump and the motor water pump according to the feedback of the power battery inlet temperature sensor, and the position opening of the five-way water valve and the three-way water valve.
c) Battery PTC heating mode: starting a heating water pump and a battery water pump; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser reaches the liquid heater to be heated, the heated cooling liquid enters from the inlet of the first three-way water valve, exits from the outlet of the first three-way water valve, reaches the first channel of the water-water heat exchanger, enters from the inlet of the second three-way water valve, exits from the outlet of the second three-way water valve, and is conveyed back to the cold condenser by the hot water pump; the cooling liquid in the channel II in the water-water heat exchanger I is subjected to heat exchange with the cooling liquid in the channel I, then enters from the inlet I of the five-way water valve, exits from the outlet II of the five-way water valve, reaches the power battery, heats the power battery, is conveyed into the channel II of the water-water heat exchanger II by the battery water pump, and then flows back into the channel II of the water-water heat exchanger I. The liquid heater adjusts output power according to feedback of a power battery inlet temperature sensor, and the battery water pump adjusts duty ratio according to battery heating target water flow.
d) Electric drive waste heat heating battery mode: the battery water pump and the motor water pump are started, the cooling liquid in the channel II of the water-water heat exchanger II enters from the inlet I of the five-way water valve through the channel II of the water-water heat exchanger I, goes out from the outlet I of the five-way water valve, is then conveyed to the electric drive assembly by the motor water pump, absorbs heat at the electric drive assembly, enters from the inlet II of the five-way water valve, goes out from the outlet II of the five-way water valve, reaches the power battery, heats the power battery through the recovered heat at the electric drive assembly, and is then conveyed back into the channel II of the water-water heat exchanger II by the battery water pump. The vehicle-mounted central control controls the flow of the battery water pump and the motor water pump according to the feedback of the power battery inlet temperature sensor, and the position opening of the five-way water valve.
The electric drive circuit cooling system operates in the following mode:
the motor water pump starts, the cooling liquid in the electric drive assembly absorbs heat at the electric drive assembly, then reaches the front end radiator, radiates heat to the outside through the electronic fan, enters from the inlet II of the six-way valve, enters from the outlet IV of the six-way valve, enters from the inlet III of the three-way water valve, exits from the outlet II of the three-way water valve, enters from the inlet III of the five-way water valve, exits from the outlet I of the five-way water valve, and is conveyed back into the electric drive assembly by the motor water pump. Wherein, the temperature sensor at the outlet of the electric drive water pump is used for feeding back the temperature of the cooling liquid at the cooling liquid inlet of the electric drive assembly.
The beneficial effects of the invention are as follows:
compared with the traditional R134a air conditioning system, the R290 heat management system has excellent thermal characteristics and strong low-temperature heating capacity, reduces the attenuation of low-temperature endurance mileage, reduces energy consumption and reduces cost; the invention optimizes the refrigerant loop, and the refrigerant loop only adopts one water-cooling condenser and one battery cooler, thereby realizing the minimization of the refrigerant filling quantity and ensuring the safety of the system; furthermore, the invention realizes the refrigeration and heating requirements of the power battery through the six-way valve and the two water-water heat exchangers, has higher safety controllability, and simultaneously, the power battery and the electric drive assembly share one radiator, and realizes the evaporation and condensation functions of the radiator through the five-way water valve and the two three-way water valves, thereby reducing the number of the heat exchangers and lowering the cost; the invention integrates the refrigerant loop, the six-way valve, the three-way water valve, the refrigeration water pump, the heating water pump, the refrigerant pipeline and the cooling liquid pipeline into the thermal management integrated module, further simplifies the loop where the refrigerant is positioned, reduces the filling amount, isolates the refrigerant loop from the passenger cabin, and further ensures the safety of the system.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
FIG. 2 is a schematic diagram of a six-way valve according to the present invention;
FIG. 3 is a schematic diagram of a thermal management integrated module according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the invention provides an R290 whole vehicle thermal management system for a new energy vehicle, which comprises an electric compressor 1, a water-cooled condenser 3, a liquid storage tank 4, an electronic expansion valve 5, a battery cooler 6, a refrigeration water pump 8, a six-way valve 9, an indoor cooler 12, an indoor heater 13, a three-way water valve one 22, a three-way water valve two 14, a water-water heat exchanger one 15, a water-water heat exchanger two 17, a battery water pump 18, a five-way water valve 21, a liquid heater 23, an electric drive water pump 24, a heating water pump 27, a front-end radiator 28 and a three-way water valve three 30.
The refrigerant outlet of the electric compressor 1 is communicated with the refrigerant inlet of the water-cooled condenser 3, and a temperature pressure sensor 2 is arranged at the refrigerant outlet of the electric compressor 1; the refrigerant outlet of the water-cooled condenser 3 is communicated with the refrigerant inlet of the liquid storage tank 4, the refrigerant outlet of the liquid storage tank 4 is communicated with the refrigerant inlet of the battery cooler 6, and the refrigerant inlet of the battery cooler 6 is provided with an electronic expansion valve 5; the refrigerant outlet of the battery cooler 6 communicates with the refrigerant inlet of the electric compressor 1, and a refrigerant temperature sensor 7 is provided at the refrigerant outlet of the battery cooler 6.
The cooling liquid outlet of the heating water pump 27 is communicated with the cooling liquid inlet of the water-cooled condenser 3, the cooling liquid outlet of the water-cooled condenser 3 is communicated with the cooling liquid inlet of the liquid heater 23, and the cooling liquid outlet of the liquid heater 23 is communicated with the inlet (a port) of the first three-way water valve 22; the outlet I (c port) of the three-way water valve I22 is communicated with the cooling liquid inlet of the indoor heater 13 and the cooling liquid inlet of the channel I in the water-water heat exchanger I15, and an indoor heater inlet temperature sensor 16 is arranged at the cooling liquid inlet of the indoor heater 13; the cooling liquid outlet of the indoor heater 13 and the cooling liquid outlet of the first channel in the first water-water heat exchanger 15 are respectively communicated with the first inlet (b port) and the second inlet (c port) of the three-way water valve II 14; the outlet (a port) of the second three-way water valve 14 is communicated with the cooling liquid inlet of the heating water pump 27.
The cooling liquid outlet of the refrigeration water pump 8 is communicated with the cooling liquid inlet of the battery cooler 6, the cooling liquid outlet of the battery cooler 6 is communicated with the first inlet (c port) of the six-way valve 9, and a battery cooler outlet temperature sensor 10 is arranged at the cooling liquid outlet of the battery cooler 6. The outlet I (b port) of the six-way valve 9 is communicated with the cooling liquid inlet of the indoor cooler 12, the outlet II (a port) of the six-way valve 9 is communicated with the cooling liquid inlet of the channel I in the water-water heat exchanger II 17, and the outlet III (f port) of the six-way valve 9, the cooling liquid outlet of the indoor cooler 12 and the cooling liquid outlet of the channel I in the water-water heat exchanger II 17 are all communicated with the cooling liquid inlet of the refrigerating water pump 8.
The cooling liquid outlet of the battery water pump 18 is communicated with the cooling liquid inlet of the second channel in the second water-water heat exchanger 17, the cooling liquid outlet of the second channel in the second water-water heat exchanger 17 is communicated with the cooling liquid inlet of the second channel in the first water-water heat exchanger 15, and the cooling liquid outlet of the second channel in the first water-water heat exchanger 15 is communicated with the first inlet (No. 3 valve port) of the five-way water valve 21.
The cooling liquid inlet of the electric drive water pump 24 is communicated with the outlet I (No. 2 valve port) of the five-way water valve 21, and an electric drive water pump outlet temperature sensor 25 is arranged at the cooling liquid outlet of the electric drive water pump 24; the outlet II (b port) of the three-way water valve I22 is communicated with the cooling liquid inlet of the front-end radiator 28 and the inlet II (No. 1 valve port) of the five-way water valve 21, the cooling liquid outlet of the front-end radiator 28 is communicated with the inlet II (e port) of the six-way valve 9, the outlet IV (d port) of the six-way valve 9 is communicated with the inlet (a port) of the three-way water valve III 30, the outlet I (c port) of the three-way water valve III 30 is communicated with the cooling liquid inlet of the hot water pump 27, and the outlet II (b port) of the three-way water valve III 30 is communicated with the inlet III (No. 5 valve port) of the five-way water valve 21.
As shown in fig. 2, the six-way valve 9 is formed by connecting a first four-way ball valve, a first three-way proportional valve and a second three-way proportional valve, specifically, an inlet (a No. 3 port) of the first three-way proportional valve is communicated with an outlet (a No. 1 port) of the second three-way proportional valve, an inlet (a No. 2 port) of the second three-way proportional valve is communicated with an outlet (a No. 4 port) of the first four-way ball valve, in addition, two outlets (a No. 1 port and a No. 2 port) of the first three-way proportional valve are respectively used as an outlet (a port) and an outlet (f port) of the sixth-way valve 9, the other outlet (a No. 3 port) of the second three-way proportional valve is used as an outlet (b port) of the sixth-way valve 9, the two inlets (a No. 1 port and a No. 3 port) of the first four-way ball valve are respectively used as an inlet (c port) and an inlet (e port) of the sixth-way valve 9, and the other outlet (a No. 2 port) of the first four-way ball valve is used as an outlet (d port) of the sixth-way valve 9.
The five-way water valve 21 is in the prior art and is formed by connecting a three-way proportional valve III and a four-way ball valve II, specifically, a connecting valve port of the three-way proportional valve III is communicated with a connecting valve port of the four-way ball valve II, in addition, an inlet I (a valve port No. 3) and an outlet II (a valve port No. 4) of the five-way water valve 21 are other two valve ports except the connecting valve port on the three-way proportional valve III, and an inlet II (a valve port No. 1), an outlet I (a valve port No. 2) and an inlet III (a valve port No. 5) are other three valve ports except the connecting valve port on the four-way ball valve II.
As a preferred embodiment, a blower 11 is provided at one side of the indoor cooler 12.
More preferably, the front-end radiator 28 is provided with an electronic fan 29 on one side.
More preferably, the electric compressor 1, the temperature and pressure sensor 2, the water-cooled condenser 3, the liquid storage tank 4, the electronic expansion valve 5, the battery cooler 6, the refrigerant temperature sensor 7, the refrigeration water pump 8, the six-way valve 9, the battery cooler outlet temperature sensor 10, the blower 11, the indoor cooler 12, the indoor heater 13, the three-way water valve two 14, the indoor heater inlet temperature sensor 16, the five-way water valve 21, the three-way water valve one 22, the liquid heater 23, the electric water pump 24, the electric water pump outlet temperature sensor 25, the heating water pump 27, the front-end radiator 28, the electronic fan 29 and the three-way water valve three 30 form an air-conditioning refrigeration and heating system; the electric compressor 1, the temperature and pressure sensor 2, the water-cooling condenser 3, the liquid storage tank 4, the electronic expansion valve 5, the battery cooler 6, the refrigerant temperature sensor 7, the refrigeration water pump 8, the six-way valve 9, the battery cooler outlet temperature sensor 10, the three-way water valve II 14, the water-water heat exchanger I15, the water-water heat exchanger II 17, the battery water pump 18, the power battery inlet temperature sensor 20, the five-way water valve 21, the three-way water valve I22, the liquid heater 23, the electric water driving pump 24, the electric water driving pump outlet temperature sensor 25, the heating water pump 27, the front-end radiator 28, the electronic fan 29 and the three-way water valve III 30 form a battery loop temperature control system; the six-way valve 9, the five-way water valve 21, the electric drive water pump 24, the electric drive water pump outlet temperature sensor 25, the front end radiator 28, the electronic fan 29 and the three-way water valve three 30 form an electric drive loop cooling system.
More preferably, as shown in fig. 3, the electric compressor 1, the temperature and pressure sensor 2, the water-cooled condenser 3, the liquid storage tank 4, the electronic expansion valve 5, the battery cooler 6, the refrigerant temperature sensor 7, the refrigeration water pump 8, the six-way valve 9, the battery cooler outlet temperature sensor 10, the three-way water valve one 22 and the heating water pump 27 constitute a heat management integrated module. The heat management integrated module is isolated from the passenger cabin, and the refrigerant loop is isolated from the passenger cabin, so that the system safety is ensured.
More preferably, the electric compressor 1, the temperature and pressure sensor 2, the water-cooled condenser 3, the liquid storage tank 4, the electronic expansion valve 5, the battery cooler 6 and the refrigerant temperature sensor 7 are connected through refrigerant pipelines to form a refrigerant loop, and all devices except the refrigerant loop are connected through a cooling liquid pipeline.
When the R290 whole vehicle thermal management system for the new energy vehicle is used, a cooling liquid outlet of the power battery 19 is communicated with a cooling liquid inlet of the battery water pump 18, the cooling liquid inlet of the power battery 19 is communicated with an outlet II (No. 4 valve port) of the five-way water valve 21, a cooling liquid inlet of the power battery 19 is provided with a power battery inlet temperature sensor 20, a cooling liquid inlet of the electric drive assembly 26 is communicated with a cooling liquid outlet of the electric drive water pump 24, and the cooling liquid outlet of the electric drive assembly 26 is communicated with a cooling liquid inlet of the front-end radiator 28 and an inlet II (No. 1 valve port) of the five-way water valve 21. The device has the following starting modes when in use:
1. An air conditioner refrigerating and heating system:
a) Passenger cabin cooling mode: in this mode, the electric compressor 1, the refrigeration water pump 8, and the heating water pump 27 are started; the gaseous refrigerant formed after heat exchange with the cooling liquid in the battery cooler 6 reaches the electric compressor 1, is pressurized by the electric compressor 1 into high-temperature high-pressure gaseous refrigerant, is conveyed to the water-cooling condenser 3 for condensation, and the condensed refrigerant passes through the liquid storage tank 4 to reach the electronic expansion valve 5, and flows back to the battery cooler 6 after being throttled and depressurized by the electronic expansion valve 5, so that the refrigerant loop circulation is completed; the low-temperature cooling liquid formed after heat exchange with the refrigerant in the battery cooler 6 enters from the first inlet (c port) of the six-way valve 9, exits from the first outlet (b port) of the six-way valve 9, reaches the indoor cooler 12, cools the air in the passenger cabin, is then conveyed back into the battery cooler 6 by the refrigerating water pump 8, and meanwhile, the air blower 11 sends the cold air at the indoor cooler 12 to the passenger cabin, so that the refrigerating in the passenger cabin is realized; the high-temperature cooling liquid formed after heat exchange with the refrigerant in the water-cooled condenser 3 enters from the inlet (a port) of the first three-way water valve 22 through the liquid heater 23 (the liquid heater 23 is not started in the mode), exits from the outlet (b port) of the first three-way water valve 22, reaches the front-end radiator 28, radiates heat to the outside through the electronic fan 29, enters from the inlet (e port) of the six-way valve 9, exits from the outlet (d port) of the six-way valve 9, enters from the inlet (a port) of the third three-way water valve 30, exits from the outlet (c port) of the third three-way water valve 30, and is finally conveyed back into the water-cooled condenser 3 by the hot water pump 27 to realize heat radiation.
b) Air source heat pump heating mode: in this mode, the electric compressor 1 is started to complete the refrigerant loop circulation, and the heating water pump 27, the refrigerating water pump 8 and the electric drive water pump 24 are started; the high-temperature cooling liquid formed after heat exchange with the refrigerant in the water-cooled condenser 3 enters from the inlet (a port) of the first three-way water valve 22 through the liquid heater 23 (the liquid heater 23 is not started in the mode), exits from the outlet (c port) of the first three-way water valve 22, reaches the indoor heater 13, heats the air in the passenger cabin, enters from the inlet (b port) of the second three-way water valve 14, exits from the outlet (a port) of the second three-way water valve 14, is conveyed back to the water-cooled condenser 3 by the hot water pump 27, and meanwhile, the blower 11 conveys the hot air at the indoor cooler 12 to the passenger cabin, so that the heating in the passenger cabin is realized, and the heating of the passenger cabin is completed; the low-temperature cooling liquid formed after heat exchange with the refrigerant in the battery cooler 6 enters from the first inlet (c port) of the six-way valve 9, exits from the fourth outlet (d port) of the six-way valve 9, enters from the third inlet (a port) of the three-way water valve 30, exits from the second outlet (b port) of the three-way water valve 30, enters from the third inlet (5 port) of the five-way water valve 21, exits from the first outlet (2 port) of the five-way water valve 21, is conveyed to the electric drive assembly 26 by the electric drive water pump 24, enters from the second inlet (e port) of the six-way valve 9 through the front end radiator 28, exits from the third outlet (f port) of the six-way valve 9, and is finally conveyed back into the battery cooler 6 by the refrigerating water pump 8.
c) Passenger cabin PTC heating mode: the mode can be used under extremely cold working conditions, in the mode, the heating water pump 27 is started, the cooling liquid with higher temperature formed after heat exchange with the refrigerant in the water-cooling condenser 3 reaches the liquid heater 23 to be heated, the heated cooling liquid enters from the inlet (a port) of the three-way water valve I22, exits from the outlet (c port) of the three-way water valve I22, reaches the indoor heater 13, heats the air in the passenger cabin, enters from the inlet (b port) of the three-way water valve II 14, exits from the outlet (a port) of the three-way water valve II 14, is conveyed back into the water-cooling condenser 3 by the heating water pump 27, and meanwhile, the blower 11 sends the hot air at the indoor heater 13 to the passenger cabin to heat the passenger cabin, so that the passenger cabin is heated, and the passenger cabin heating is completed.
Wherein, the liquid heater 23 can adjust the output power according to the self-contained water temperature sensor, thereby ensuring the heating comfort of the passenger cabin.
d) Passenger cabin heating dehumidification mode: in this mode, the electric compressor 1 is started to complete the refrigerant loop circulation, and the refrigeration water pump 8, the electric drive water pump 24 and the heating water pump 27 are started at the same time; the low-temperature cooling liquid formed after heat exchange with the refrigerant in the battery cooler 6 enters from the first inlet (c port) of the six-way valve 9, exits from the first outlet (b port) of the six-way valve 9, reaches the indoor cooler 12, and is then conveyed back into the battery cooler 6 by the refrigeration water pump 8; the high-temperature cooling liquid formed after heat exchange with the refrigerant in the water-cooled condenser 3 reaches the liquid heater 23 to be heated, the heated cooling liquid enters from the inlet (a port) of the first three-way water valve 22, exits from the outlet (c port) of the first three-way water valve 22, reaches the indoor heater 13, heats the air in the passenger cabin, enters from the inlet (b port) of the second three-way water valve 14, exits from the outlet (a port) of the second three-way water valve 14, is conveyed back into the water-cooled condenser 3 by the hot water pump 27, and meanwhile, the blower 11 sends the hot air at the indoor heater 13 to the passenger cabin, dehumidifies by the indoor cooler 12 and finally reaches the passenger cabin to realize heating and dehumidification in the passenger cabin.
2. Battery loop temperature control system:
a) Battery forced cooling mode: in this mode, the circuit in which the power battery 19 is located and the circuit in which the electric drive assembly 26 is located are connected in parallel, and do not interfere with each other. In this mode, the electric compressor 1 is started, the refrigerant circuit circulation is completed, and the refrigeration water pump 8, the battery water pump 18 and the heating water pump 27 are started at the same time; the low-temperature cooling liquid formed after heat exchange with the refrigerant in the battery cooler 6 enters from the first inlet (c port) of the six-way valve 9, exits from the second outlet (a port) of the six-way valve 9, passes through the first channel of the water-water heat exchanger II 17 and is conveyed back into the battery cooler 6 by the refrigeration water pump 8; the cooling liquid in the second channel of the water-water heat exchanger 17 exchanges heat with the cooling liquid in the first channel to form low-temperature cooling liquid, and the low-temperature cooling liquid enters from the first inlet (No. 3 valve port) of the five-way water valve 21 through the second channel of the water-water heat exchanger 15, and exits from the second outlet (No. 4 valve port) of the five-way water valve 21 to reach the power battery 19, so that the power battery 19 is forcedly cooled, and then is conveyed back into the second channel of the water-water heat exchanger 17 by the battery water pump 18; the high-temperature cooling liquid formed after heat exchange with the refrigerant in the water-cooled condenser 3 enters from the inlet (a port) of the first three-way water valve 22 through the liquid heater 23 (the liquid heater 23 is not started in the mode), exits from the outlet (b port) of the first three-way water valve 22, reaches the front-end radiator 28, radiates heat to the outside through the electronic fan 29, enters from the inlet (e port) of the six-way valve 9, exits from the outlet (d port) of the six-way valve 9, enters from the inlet (a port) of the third three-way water valve 30, exits from the outlet (c port) of the third three-way water valve 30, and is conveyed back into the water-cooled condenser 3 by the hot water pump 27.
b) Natural heat dissipation mode of battery: in this mode, the circuit in which the power battery 19 is located and the circuit in which the electric drive assembly 26 is located are connected in series, and the refrigerant circuit does not operate and radiates heat by means of the front-end radiator 28. In this mode, the battery water pump 18 and the motor water pump 24 are started, the cooling liquid in the power battery 19 absorbs heat of the power battery 19 and then is conveyed to the channel II of the water-water heat exchanger II 17 by the battery water pump 18, then enters from the inlet I (valve port No. 3) of the five-way water valve 21 through the channel II of the water-water heat exchanger I15, exits from the outlet I (valve port No. 2) of the five-way water valve 21, then is conveyed to the electric drive assembly 26 by the motor water pump 24, reaches the front end radiator 28, radiates heat to the outside through the electronic fan 29, enters from the inlet II (valve port e) of the six-way valve 9, exits from the outlet IV (valve port d) of the six-way valve 9, enters from the inlet A (valve port) of the three-way water valve III 30, enters from the inlet III (valve port b) of the three-way water valve III 30, exits from the inlet III (valve port No. 5) of the five-way water valve 21, exits from the outlet II (valve port No. 4) of the five-way water valve 21, and flows back to the power battery 19, and therefore radiates heat to the power battery 19.
The vehicle central control controls the flow of the battery water pump 18 and the motor water pump 24 according to the feedback of the power battery inlet temperature sensor 20, and the position opening of the five-way water valve 21 and the three-way water valve 30, and the mode can save energy consumption when the heat dissipation requirement of the power battery 19 is smaller.
c) Battery PTC heating mode: in this mode, the heating water pump 27 and the battery water pump 18 are started; the cooling liquid with higher temperature formed after heat exchange with the refrigerant in the water-cooled condenser 3 reaches the liquid heater 23 to be heated, the heated cooling liquid enters from the inlet (a port) of the first three-way water valve 22, exits from the outlet (c port) of the first three-way water valve 22, reaches the first channel of the first water-water heat exchanger 15, enters from the inlet (c port) of the second three-way water valve 14, exits from the outlet (a port) of the second three-way water valve 14, and is conveyed back to the water-cooled condenser 3 by the heating water pump 27; the cooling liquid in the channel II in the water-water heat exchanger 15 exchanges heat with the cooling liquid in the channel I to form high-temperature cooling liquid, then enters from the inlet I (valve port No. 3) of the five-way water valve 21, exits from the outlet II (valve port No. 4) of the five-way water valve 21, reaches the power battery 19, heats the power battery 19, is then conveyed into the channel II of the water-water heat exchanger 17 by the battery water pump 18, and then flows back into the channel II of the water-water heat exchanger 15.
Wherein, the liquid heater 23 adjusts output power according to feedback of the power battery inlet temperature sensor 20, ensures that the cooling liquid at the cooling liquid inlet of the power battery 19 keeps a certain temperature, and the battery water pump 18 adjusts duty ratio according to the battery heating target water flow, thereby ensuring the battery heating water flow.
d) Electric drive waste heat heating battery mode: in this mode, the loop in which the power battery 19 is located is connected in series with the loop in which the electric drive assembly 26 is located, and the cooling liquid keeps the power battery 19 warm by recovering the waste heat of the electric drive loop. In this mode, the battery water pump 18 and the motor water pump 24 are started, the cooling liquid in the channel two of the water-water heat exchanger two 17 enters from the channel two of the water-water heat exchanger two 15 through the inlet one (valve port No. 3) of the five-way water valve 21, exits from the outlet one (valve port No. 2) of the five-way water valve 21, is then conveyed to the electric drive assembly 26 by the motor water pump 24, absorbs the heat at the electric drive assembly 26, enters from the inlet two (valve port No. 1) of the five-way water valve 21, exits from the outlet two (valve port No. 4) of the five-way water valve 21, reaches the power battery 19, heats the power battery 19 through the recovered heat at the electric drive assembly 26, and is then conveyed back into the channel two of the water-water heat exchanger two 17 by the battery water pump 18.
Wherein the vehicle center control controls the flow rates of the battery water pump 18 and the motor water pump 24 and the position opening of the five-way water valve 21 according to the feedback of the power battery inlet temperature sensor 20.
3. Electric drive loop cooling system:
in this mode, the motor water pump 24 is started, the cooling liquid in the electric drive assembly 26 absorbs heat at the electric drive assembly 26, then reaches the front end radiator 28, radiates heat to the outside through the electronic fan 29, then enters from the second inlet (e port) of the six-way valve 9, exits from the fourth outlet (d port) of the six-way valve 9, enters from the inlet (a port) of the three-way water valve three 30, exits from the second outlet (b port) of the three-way water valve three 30, enters from the third inlet (5 port) of the five-way water valve 21, exits from the first outlet (2 port) of the five-way water valve 21, and is conveyed back into the electric drive assembly 26 by the motor water pump 24.
Wherein the electric drive water pump outlet temperature sensor 25 reflects the temperature of the cooling liquid at the cooling liquid inlet of the electric drive assembly 26.

Claims (8)

1. The utility model provides a whole car thermal management system of R290 for new energy automobile, includes electric compressor, water-cooled condenser, liquid storage pot, electronic expansion valve, battery cooler, refrigeration water pump, indoor cooler, indoor heater, water heat exchanger one, water heat exchanger two, battery water pump, liquid heater, electric drive water pump, heating water pump and front end radiator, its characterized in that: the water valve also comprises a six-way valve, a three-way water valve I, a three-way water valve II, a five-way water valve and a three-way water valve III; the refrigerant outlet of the electric compressor is communicated with the refrigerant inlet of the water-cooled condenser, and a temperature pressure sensor is arranged at the refrigerant outlet of the electric compressor; the refrigerant outlet of the water-cooled condenser is communicated with the refrigerant inlet of the liquid storage tank, the refrigerant outlet of the liquid storage tank is communicated with the refrigerant inlet of the battery cooler, and the refrigerant inlet of the battery cooler is provided with an electronic expansion valve; the refrigerant outlet of the battery cooler is communicated with the refrigerant inlet of the electric compressor, and a refrigerant temperature sensor is arranged at the refrigerant outlet of the battery cooler;
The cooling liquid outlet of the heating water pump is communicated with the cooling liquid inlet of the water-cooling condenser, the cooling liquid outlet of the water-cooling condenser is communicated with the cooling liquid inlet of the liquid heater, and the cooling liquid outlet of the liquid heater is communicated with the inlet of the first three-way water valve; the outlet I of the three-way water valve I is communicated with the cooling liquid inlet of the indoor heater and the cooling liquid inlet of the channel I of the water-water heat exchanger I, and an indoor heater inlet temperature sensor is arranged at the cooling liquid inlet of the indoor heater; the cooling liquid outlet of the indoor heater and the cooling liquid outlet of the first channel in the water-water heat exchanger are respectively communicated with the inlet I and the inlet II of the three-way water valve II; the outlet of the three-way water valve II is communicated with the cooling liquid inlet of the heating water pump;
the cooling liquid outlet of the refrigeration water pump is communicated with the cooling liquid inlet of the battery cooler, the cooling liquid outlet of the battery cooler is communicated with the inlet I of the six-way valve, and a battery cooler outlet temperature sensor is arranged at the cooling liquid outlet of the battery cooler; the outlet of the six-way valve I is communicated with the cooling liquid inlet of the indoor cooler, the outlet of the six-way valve II is communicated with the cooling liquid inlet of the channel I in the water-water heat exchanger II, and the outlet of the six-way valve III, the cooling liquid outlet of the indoor cooler and the cooling liquid outlet of the channel I in the water-water heat exchanger II are communicated with the cooling liquid inlet of the refrigerating water pump;
The cooling liquid outlet of the battery water pump is communicated with the cooling liquid inlet of the second channel in the water-water heat exchanger, the cooling liquid outlet of the second channel in the water-water heat exchanger is communicated with the cooling liquid inlet of the second channel in the first channel of the water-water heat exchanger, and the cooling liquid outlet of the second channel in the first channel of the water-water heat exchanger is communicated with the inlet of the first five-way water valve;
the cooling liquid inlet of the electric drive water pump is communicated with the outlet I of the five-way water valve, and an electric drive water pump outlet temperature sensor is arranged at the cooling liquid outlet of the electric drive water pump; the outlet of the first three-way water valve is communicated with the cooling liquid inlet of the front-end radiator and the inlet of the fifth water valve, the cooling liquid outlet of the front-end radiator is communicated with the inlet of the sixth water valve, the outlet of the sixth water valve is communicated with the inlet of the third three-way water valve, the outlet of the third three-way water valve is communicated with the cooling liquid inlet of the hot water pump, and the outlet of the third three-way water valve is communicated with the inlet of the third five water valve.
2. The R290 whole vehicle thermal management system for a new energy vehicle according to claim 1, wherein: the six-way valve is formed by connecting a four-way ball valve I, a three-way proportional valve I and a three-way proportional valve II, wherein an inlet of the three-way proportional valve I is communicated with an outlet of the three-way proportional valve II, an inlet of the three-way proportional valve II is communicated with an outlet of the four-way ball valve I, in addition, two outlets of the three-way proportional valve I are respectively used as an outlet II and an outlet III of the six-way valve, the other outlet of the three-way proportional valve II is used as an outlet I of the six-way valve, two inlets of the four-way ball valve I are respectively used as an inlet I and an inlet II of the six-way valve, and the other outlet of the four-way ball valve I is used as an outlet IV of the six-way valve.
3. The R290 whole vehicle thermal management system for a new energy vehicle according to claim 1, wherein: one side of the indoor cooler is provided with a blower.
4. The R290 whole car thermal management system for a new energy car according to claim 3, wherein: an electronic fan is arranged on one side of the front-end radiator.
5. The R290 whole vehicle thermal management system for a new energy vehicle according to claim 4, wherein: the electric compressor, the temperature pressure sensor, the water-cooled condenser, the liquid storage tank, the electronic expansion valve, the battery cooler, the refrigerant temperature sensor, the refrigerating water pump, the six-way valve, the battery cooler outlet temperature sensor, the blower, the indoor cooler, the indoor heater, the three-way water valve II, the indoor heater inlet temperature sensor, the five-way water valve, the three-way water valve I, the liquid heater, the electric water pump outlet temperature sensor, the heating water pump, the front end radiator, the electronic fan and the three-way water valve III form an air conditioner refrigerating and heating system; the system comprises an electric compressor, a temperature pressure sensor, a water-cooling condenser, a liquid storage tank, an electronic expansion valve, a battery cooler, a refrigerant temperature sensor, a refrigerating water pump, a six-way valve, a battery cooler outlet temperature sensor, a three-way water valve II, a water-water heat exchanger I, a water-water heat exchanger II, a battery water pump, a power battery inlet temperature sensor, a five-way water valve, a three-way water valve I, a liquid heater, an electric drive water pump outlet temperature sensor, a heating water pump, a front-end radiator, an electronic fan and a three-way water valve III, wherein the electric drive water pump, the heating water pump, the front-end radiator, the electronic fan and the three-way water valve III form a battery loop temperature control system; six-way valve, five-way water valve, electric drive water pump outlet temperature sensor, front end radiator, electronic fan and three-way water valve three constitute electric drive cooling loop system.
6. The R290 whole vehicle thermal management system for a new energy vehicle according to claim 5, wherein: the electric compressor, the temperature and pressure sensor, the water-cooling condenser, the liquid storage tank, the electronic expansion valve, the battery cooler, the refrigerant temperature sensor, the refrigerating water pump, the six-way valve, the battery cooler outlet temperature sensor, the three-way water valve I and the heating water pump form a thermal management integrated module, and the thermal management integrated module is isolated from the passenger cabin.
7. The R290 whole vehicle thermal management system for a new energy vehicle of claim 6, wherein: the electric compressor, the temperature pressure sensor, the water-cooled condenser, the liquid storage tank, the electronic expansion valve, the battery cooler and the refrigerant temperature sensor are connected through refrigerant pipelines to form a refrigerant loop, and all devices except the refrigerant loop are connected through a cooling liquid pipeline.
8. The method for thermal management of an R290 whole vehicle thermal management system for a new energy vehicle of claim 7, wherein:
the cooling liquid outlet of the power battery is communicated with the cooling liquid inlet of the battery water pump, the cooling liquid inlet of the power battery is communicated with the outlet II of the five-way water valve, a power battery inlet temperature sensor is arranged at the cooling liquid inlet of the power battery, the cooling liquid inlet of the electric drive assembly is communicated with the cooling liquid outlet of the electric drive water pump, and the cooling liquid outlet of the electric drive assembly is communicated with the cooling liquid inlet of the front-end radiator and the inlet II of the five-way water valve; the use modes are as follows:
The air conditioner refrigerating and heating system is provided with the following working modes:
a) Passenger cabin cooling mode: starting the electric compressor, the refrigeration water pump and the heating water pump; the gaseous refrigerant formed after heat exchange with the cooling liquid in the battery cooler reaches the electric compressor to be pressurized, the pressurized gaseous refrigerant is conveyed to the water-cooled condenser to be condensed, the condensed refrigerant passes through the liquid storage tank to reach the electronic expansion valve, and the refrigerant flows back to the battery cooler after being throttled and depressurized by the electronic expansion valve, so that the circulation of a refrigerant loop is completed; the cooling liquid in the battery cooler after heat exchange with the refrigerant enters from the inlet I of the six-way valve, exits from the outlet I of the six-way valve, reaches the indoor cooler, cools the air in the passenger cabin, is then conveyed back into the battery cooler by the refrigerating water pump, and meanwhile, the air blower sends the cool air at the indoor cooler to the passenger cabin, and further cools the passenger cabin; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the front-end radiator, radiates heat to the outside through the electronic fan, then enters from the inlet of the second six-way valve, goes out from the outlet of the fourth six-way valve, enters from the inlet of the third three-way water valve, goes out from the outlet of the third three-way water valve, and finally is conveyed back into the water-cooled condenser by the heating water pump;
b) Air source heat pump heating mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a heating water pump, a refrigerating water pump and an electric drive water pump at the same time; the cooling liquid in the water-cooling condenser after heat exchange with the refrigerant enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, then enters from the inlet of the second three-way water valve, goes out from the outlet of the second three-way water valve, is conveyed by the hot water pump to return water to the cold condenser, and meanwhile, the blower sends hot air at the indoor cooler to the passenger cabin to heat the passenger cabin; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the fourth outlet of the six-way valve, enters from the third inlet of the three-way valve, exits from the second outlet of the three-way valve, enters from the third inlet of the five-way valve, exits from the first outlet of the five-way valve, is conveyed to the electric drive assembly by the electric drive water pump, enters from the second inlet of the six-way valve through the front end radiator, exits from the third outlet of the six-way valve, and is finally conveyed back into the battery cooler by the refrigeration water pump;
c) Passenger cabin PTC heating mode: the heating water pump is started, the cooling liquid in the water-cooled condenser after heat exchange with the refrigerant reaches the liquid heater to be heated, the heated cooling liquid enters from the inlet of the first three-way water valve, exits from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, enters from the inlet of the second three-way water valve, exits from the outlet of the second three-way water valve, is conveyed by the heating water pump to be returned into the water-cooled condenser, and meanwhile, the blower sends hot air at the indoor heater to the passenger cabin to heat the passenger cabin; wherein, the liquid heater adjusts the output power according to the self-contained water temperature sensor;
d) Passenger cabin heating dehumidification mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a refrigeration water pump, an electric drive water pump and a heating water pump; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the first outlet of the six-way valve, reaches the indoor cooler, and is then conveyed back into the battery cooler by the refrigerating water pump; the cooling liquid after heat exchange with the refrigerant in the water-cooling condenser reaches the liquid heater for heating, the heated cooling liquid enters from the inlet of the first three-way water valve, exits from the outlet of the first three-way water valve, reaches the indoor heater, heats air in the passenger cabin, enters from the inlet of the second three-way water valve, exits from the outlet of the second three-way water valve, is conveyed back into the water-cooling condenser by the heating water pump, and meanwhile, the blower sends hot air at the indoor heater to the passenger cabin, dehumidifies through the indoor cooler and finally reaches the passenger cabin;
The battery loop temperature control system has the following working modes:
a) Battery forced cooling mode: starting an electric compressor to finish the circulation of a refrigerant loop, and starting a refrigeration water pump, a battery water pump and a heating water pump; the cooling liquid after heat exchange with the refrigerant in the battery cooler enters from the first inlet of the six-way valve, exits from the second outlet of the six-way valve, passes through the first channel of the water-water heat exchanger and is conveyed back into the battery cooler by the refrigeration water pump; the cooling liquid in the second channel of the water-water heat exchanger and the cooling liquid in the first channel of the water-water heat exchanger are subjected to heat exchange, enter from the first inlet of the five-way water valve through the second channel of the water-water heat exchanger, exit from the second outlet of the five-way water valve, reach the power battery, forcedly cool the power battery, and then are conveyed back into the second channel of the water-water heat exchanger by the battery water pump; the cooling liquid after heat exchange with the refrigerant in the water-cooled condenser enters from the inlet of the first three-way water valve through the liquid heater, goes out from the outlet of the first three-way water valve, reaches the front-end radiator, radiates heat to the outside through the electronic fan, then enters from the inlet of the second six-way valve, goes out from the outlet of the fourth six-way valve, then enters from the inlet of the third three-way water valve, goes out from the outlet of the third three-way water valve, and is conveyed back into the cold condenser by the hot water pump;
b) Natural heat dissipation mode of battery: the battery water pump and the motor water pump are started, cooling liquid in the power battery absorbs heat of the power battery and is conveyed to a channel II of the water-water heat exchanger II by the battery water pump, then enters from an inlet I of the five-way water valve through the channel II of the water-water heat exchanger I, exits from an outlet I of the five-way water valve, is conveyed to the electric drive assembly by the motor water pump, reaches the front end radiator, radiates heat to the outside through the electronic fan, enters from an inlet II of the six-way valve, exits from an outlet IV of the six-way valve, enters from an inlet III of the three-way water valve, exits from an inlet III of the five-way water valve, exits from an outlet II of the five-way water valve, and flows back to the power battery; the vehicle central control controls the flow of the battery water pump and the motor water pump according to the feedback of the power battery inlet temperature sensor, and the position opening of the five-way water valve and the three-way water valve;
c) Battery PTC heating mode: starting a heating water pump and a battery water pump, enabling the cooling liquid in the water-cooling condenser after heat exchange with the refrigerant to reach a liquid heater for heating, enabling the heated cooling liquid to enter from an inlet of a three-way water valve I, to exit from an outlet of the three-way water valve I, reach a channel I of a water-water heat exchanger I, then enter from an inlet of a three-way water valve II, exit from an outlet of the three-way water valve II, and then be conveyed by the heating water pump to return to the water-cooling condenser; the cooling liquid in the channel II in the water-water heat exchanger I and the cooling liquid in the channel I are subjected to heat exchange, then enter from the inlet I of the five-way water valve, go out from the outlet II of the five-way water valve, reach the power battery, heat the power battery, then are conveyed into the channel II of the water-water heat exchanger II by the battery water pump, and then flow back into the channel II of the water-water heat exchanger I; the liquid heater adjusts output power according to feedback of a power battery inlet temperature sensor, and the battery water pump adjusts duty ratio according to battery heating target water flow;
d) Electric drive waste heat heating battery mode: the battery water pump and the motor water pump are started, the cooling liquid in the channel II of the water-water heat exchanger II enters from the inlet I of the five-way water valve through the channel II of the water-water heat exchanger I, goes out from the outlet I of the five-way water valve, is then conveyed to the electric drive assembly by the motor water pump, absorbs heat at the electric drive assembly, enters from the inlet II of the five-way water valve, goes out from the outlet II of the five-way water valve, reaches the power battery, heats the power battery through the heat at the recovered electric drive assembly, and is then conveyed back into the channel II of the water-water heat exchanger II by the battery water pump; the vehicle central control controls the flow of the battery water pump and the motor water pump according to the feedback of the power battery inlet temperature sensor, and the position opening of the five-way water valve;
the electric drive circuit cooling system operates in the following mode:
the motor water pump is started, cooling liquid in the electric drive assembly absorbs heat at the electric drive assembly, then reaches the front end radiator, radiates heat to the outside through the electronic fan, enters from the inlet II of the six-way valve, exits from the outlet IV of the six-way valve, enters from the inlet III of the three-way water valve, exits from the outlet II of the three-way water valve, enters from the inlet III of the five-way water valve, exits from the outlet I of the five-way water valve, and is conveyed back into the electric drive assembly by the motor water pump; wherein, the temperature sensor at the outlet of the electric drive water pump is used for feeding back the temperature of the cooling liquid at the cooling liquid inlet of the electric drive assembly.
CN202311170185.6A 2023-09-12 2023-09-12 R290 whole vehicle thermal management system and method for new energy automobile Pending CN117246105A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117790987A (en) * 2024-02-27 2024-03-29 深圳市首航新能源股份有限公司 Energy storage thermal management system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117790987A (en) * 2024-02-27 2024-03-29 深圳市首航新能源股份有限公司 Energy storage thermal management system and control method thereof
CN117790987B (en) * 2024-02-27 2024-05-28 深圳市首航新能源股份有限公司 Energy storage thermal management system and control method thereof

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