CN113771583B - Heat pump air conditioning system with intermediate heat exchanger for integrated power battery thermal management - Google Patents
Heat pump air conditioning system with intermediate heat exchanger for integrated power battery thermal management Download PDFInfo
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- CN113771583B CN113771583B CN202110963834.2A CN202110963834A CN113771583B CN 113771583 B CN113771583 B CN 113771583B CN 202110963834 A CN202110963834 A CN 202110963834A CN 113771583 B CN113771583 B CN 113771583B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00321—Heat exchangers for air-conditioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
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- 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
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- 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
- B60L58/27—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 heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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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
- B60H2001/3286—Constructional features
- B60H2001/3291—Locations with heat exchange within the refrigerant circuit itself
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The heat pump air conditioning system with the integrated power battery thermal management of the intermediate heat exchanger is characterized in that the outdoor heat exchanger is connected in series with a combination valve, the outdoor heat exchanger is connected in series with a second electronic expansion valve, the second electronic expansion valve is connected in series with a direct cooling plate, the direct cooling plate is connected in series with a first one-way valve, and the combination valve is connected in series with the combination valve, so that a large loop is formed; a second check valve is communicated between the direct cooling plate and the first check valve, and the electronic compressor is communicated with an indoor condenser which is communicated with the intermediate heat exchanger; a third electronic expansion valve is communicated between the outdoor heat exchanger and the second electronic expansion valve; a second throttle valve is communicated between the second electronic expansion valve and the direct cooling plate, and is connected in series with a first throttle valve; the outdoor heat exchanger is also communicated with the first electronic expansion valve, and the evaporator is further communicated between the second one-way valve and the gas-liquid separator. The utility model has higher integration level, and the passenger cabin heat management and the power battery heat management are mutually independent, so that the refrigerating and heating of the passenger cabin and the power battery under different working conditions can be satisfied, and the use effect is good.
Description
Technical Field
The utility model relates to a heat management and heat pump air conditioning system of a power battery of a new energy automobile, in particular to a heat pump air conditioning system which is suitable for heat management of an integrated power battery of a new energy automobile and comprises an intermediate heat exchanger.
Background
With the development of new energy automobiles, especially pure electric automobiles, users have higher requirements on the whole automobile endurance mileage, and the reduction of the winter endurance mileage is one of the problems to be solved by the pure electric automobiles. The heat pump system is a key technology for avoiding the reduction of the endurance mileage in winter, and transfers heat into a high-temperature environment by absorbing heat from the low-temperature environment through an outdoor heat exchanger. The technology of the heat pump air conditioning system for cooling and heating the passenger cabin independently is relatively mature, and various technical schemes can be realized.
The power battery thermal management needs to realize cooling and heating of the power battery, and the cooling mode is two modes of indirect cooling of a battery cooler (refrigerating machine) and direct cooling of a direct cooling plate. The indirect cooling of the battery cooler can realize the cooling and heating functions of the power battery, but has the problems of lower heat efficiency, heavier weight of heat exchange components, increased leakage risk of cooling liquid and the like. The direct cooling plate adopts the direct contact cooling of the refrigerant and the power battery, and has the advantage of high heat exchange efficiency. The electric heating mode is adopted for heating, so that the energy efficiency is high, and the endurance mileage of the whole vehicle under the low-temperature working condition is indirectly reduced.
The power battery thermal management function is relatively single, and has been gradually integrated into heat pump air conditioning systems. At present, the direct cooling plate is widely applied to the integration of indirect cooling of a battery cooler, and has certain advantages in refrigeration, but the problem to be solved in heating is quite many, and the direct cooling plate is not widely applied to new energy automobiles.
Patent CN107878222a "a distributed direct cooling device and method for power battery of electric automobile", cooling of power battery is realized through the cooling plate contacting with the bottom of power battery module, but the patent only relates to the efficient cooling of power battery, and does not contain heating function. CN 109449536a "direct thermal management system of heat pump type refrigerant of power battery and method", patent adopts the two-way electronic expansion valve, realize the refrigeration and heating function of power battery through the four-way reversing valve, but two-way electronic expansion valve and four-way reversing valve are higher in cost, and under the heating working condition, in order to reduce the temperature of battery cooling inlet, use the heat exchanger to get rid of partial heat, the energy loss is much, the COP value of heating working condition is lower, the refrigeration and heating function of two branches can not be adjusted independently, lack defrosting defogging function, the application degree of difficulty is great on the new energy automobile.
Disclosure of Invention
The utility model aims to provide a heat pump air conditioning system with reasonable structure and good use effect for heat management of an integrated power battery with an intermediate heat exchanger.
The technical scheme of the utility model is that the heat pump air conditioning system for heat management of the integrated power battery with the intermediate heat exchanger is characterized in that: the outdoor heat exchanger is connected in series with a combination valve, the outdoor heat exchanger is connected in series with a second electronic expansion valve, the second electronic expansion valve is connected in series with a direct cooling plate, the direct cooling plate is connected in series with a first one-way valve, the first one-way valve is connected in series with the combination valve, and the components form a large loop; a second one-way valve is communicated between the direct cooling plate and the first one-way valve, the second one-way valve is connected in series with a gas-liquid separator and an electronic compressor, the other end of the electronic compressor is communicated with an indoor condenser, and the indoor condenser is communicated with an interface a of the intermediate heat exchanger; a third electronic expansion valve is communicated between the outdoor heat exchanger and the second electronic expansion valve, and the third electronic expansion valve is communicated with a c interface of the intermediate heat exchanger; the interface of the middle heat exchanger b is connected in parallel to a first throttle valve and a second throttle valve, the first throttle valve is connected between the first check valve and the combination valve connected in series, and the second throttle valve is connected between the second electronic expansion valve and the direct cooling plate; the interface of the intermediate heat exchanger d is connected between the second one-way valve and the gas-liquid separator; the outdoor heat exchanger is also communicated with a first electronic expansion valve which is communicated with an evaporator, and the evaporator is communicated between a second one-way valve and the gas-liquid separator.
And a condensing fan is arranged outside the outdoor heat exchanger.
And a blower is arranged outside the evaporator.
The intermediate heat exchanger is of a plate type structure with high-efficiency heat exchange, four interfaces of the intermediate heat exchange are high-temperature and high-pressure refrigerant channels, and a cd interface is a low-temperature and low-pressure refrigerant channel.
The utility model provides a heat pump air conditioning system with an intermediate heat exchanger for integrating power battery heat management, wherein the power battery heat management is integrated into the heat pump system, so that independent control of a battery heat pipeline loop and a passenger cabin heat pipeline loop is realized. According to the combination of two independent different demands, the system can be divided into a refrigerating working condition, a heating working condition, a passenger cabin refrigerating working condition, a power battery heating working condition, a passenger cabin heating working condition and a power battery refrigerating working condition. The refrigerating working conditions can be divided into 4 small working conditions, such as a single cooling working condition of the passenger cabin and a single cooling working condition of the power battery, a composite cooling working condition of the passenger cabin and the power battery, defrosting and demisting. The opening and closing and opening of the combined valve are adjusted through the throttle valve, the one-way valve and the electronic expansion valve.
Under the refrigerating working condition, the passenger cabin evaporator is connected with the direct cooling plate in the power battery pack in parallel, and the flow distribution of the two parallel loops is regulated through the electronic expansion valve, so that the passenger cabin and the power battery are cooled independently or in a combined mode. Under the heating condition, the condenser in the passenger cabin is connected with the direct cooling plate in series to heat the passenger cabin and the power battery. On the basis of the refrigerating and heating working conditions, the refrigerating/heating requirements of the passenger cabin refrigerating and power battery heating working conditions and the passenger cabin refrigerating and power battery refrigerating working conditions are met by adjusting the flow directions of the valve and the local refrigerant.
Under the heating working condition, the temperature of the refrigerant at the outlet of the indoor condenser is higher, about 50-60 ℃, the temperature difference of the power battery is overlarge due to the direct heating of the high-temperature refrigerant, the service life of the power battery is reduced, and an intermediate heat exchanger is additionally arranged between the indoor condenser and the direct cooling plate. The intermediate heat exchanger is of a plate heat exchanger structure, the low-temperature low-pressure refrigerant at the outlet of the outdoor heat exchanger is used for cooling the high-temperature high-pressure refrigerant at the outlet of the indoor condenser, the temperature of the inlet of the direct cooling plate is reduced to 20-30 ℃, the high temperature difference and the waste of part of energy in the battery heating process are avoided, meanwhile, the superheat degree of the refrigerant at the outlet of the outdoor heat exchanger can be improved, the heating cycle COP is improved, and the service life of the electronic compressor is prolonged.
The heat pump air conditioning system has higher integration level, and the passenger cabin heat management and the power battery heat management are mutually independent, so that the refrigerating and heating of the passenger cabin and the power battery under different working conditions can be met, and particularly under the heating working condition, the power battery loop has low energy consumption, high energy efficiency ratio and light weight, and is beneficial to the improvement of the winter endurance mileage of the whole vehicle. Meanwhile, the system has good expansibility, and a cooling liquid loop such as electrode electric control and the like can be coupled with a heat pump air conditioning system through an intermediate heat exchanger to form a complete whole vehicle thermal management system.
Drawings
Fig. 1 is a schematic view of the overall structure of the present utility model.
Fig. 2 is a schematic diagram of a refrigeration cycle of a heat pump air conditioning system according to the present utility model.
Fig. 3 is a schematic view of a heating cycle of the heat pump air conditioning system according to the present utility model.
Fig. 4 is a schematic diagram of a heat pump air conditioning system passenger compartment refrigeration and power battery heating cycle according to the present utility model.
Fig. 5 is a schematic diagram of a heat pump air conditioning system passenger compartment heating and power battery refrigeration cycle according to the present utility model.
Detailed Description
The embodiments are described in detail with reference to the accompanying drawings:
it should be noted that, in the description of the present utility model, terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships, which are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
Example 1
The heat pump air conditioning system of integrated power battery thermal management containing intermediate heat exchanger, the outdoor heat exchanger is connected in series with the combination valve, the outdoor heat exchanger is connected in series with the second electronic expansion valve, the second electronic expansion valve is connected in series with the direct cooling plate, the direct cooling plate is connected in series with the first check valve, the first check valve is connected in series with the combination valve, the above-mentioned components form a large loop; a second one-way valve is communicated between the direct cooling plate and the first one-way valve, the second one-way valve is connected in series with a gas-liquid separator and an electronic compressor, the other end of the electronic compressor is communicated with an indoor condenser, and the indoor condenser is communicated with an interface a of the intermediate heat exchanger; a third electronic expansion valve is communicated between the outdoor heat exchanger and the second electronic expansion valve, and the third electronic expansion valve is communicated with a c interface of the intermediate heat exchanger; a second throttle valve is communicated between the second electronic expansion valve and the direct cooling plate, the second throttle valve is communicated with a d interface of the intermediate heat exchanger, the second throttle valve is also connected in series with a first throttle valve, and the first throttle valve is communicated between the first check valve series combination valves; the outdoor heat exchanger is also communicated with a first electronic expansion valve which is communicated with an evaporator, and the evaporator is communicated between a second one-way valve and the gas-liquid separator.
The outdoor heat exchanger of this embodiment is provided with a condensing fan outside.
The outside of the evaporator in this embodiment is provided with a blower.
The intermediate heat exchanger in this embodiment is a plate structure with efficient heat exchange, four interfaces of intermediate heat exchange, the ab interface is a high-temperature high-pressure refrigerant channel, and the cd interface is a low-temperature low-pressure refrigerant channel.
The working state of the utility model under different use requirements is further described with reference to the examples:
1. refrigeration working condition:
under refrigeration working conditions, the first throttle valve is fully opened, the second throttle valve is fully closed, after the refrigerant is compressed by the electronic compressor, the high-temperature and high-pressure refrigerant enters the indoor condenser in the HVAC module in the passenger cabin, at the moment, the air door of the indoor condenser of the HVAC module is closed, the air door of the evaporator is opened, and the refrigerant only flows through the indoor heat exchanger and does not exchange heat. The refrigerant passing through the indoor heat exchanger flows in from the port a, flows out from the port b, the third electronic expansion valve is closed, and the intermediate heat exchanger does not exchange heat as the indoor heat exchanger. The refrigerant flows through the first throttle valve and the combination valve to enter the outdoor heat exchanger, and under the refrigerating working condition, the refrigerant passes through the passage in the one-way valve without throttling. The condensing fan is started, the outdoor heat exchanger is used as a condenser to radiate heat to the environment, and after the outdoor heat exchanger is used for condensing, the high-temperature and high-pressure cooling liquid is cooled into high-pressure and medium-temperature saturated liquid (about 50-60 ℃). Under this operating mode, depending on the opening condition of the electronic expansion valve, it can be divided into three sub-operating modes: the first electronic expansion valve is opened, the second electronic expansion valve is closed, and the passenger cabin single cooling working condition is achieved;
the first electronic expansion valve is closed, and the second electronic expansion valve is opened to form a power battery unit Leng Gongkuang; 1. the second electronic expansion valve is opened, so that the composite refrigeration working conditions of the passenger cabin and the power battery can be met by adjusting the opening of the first electronic expansion valve and the second electronic expansion valve, adjusting the flow distribution of the refrigerant in the two loops and adapting to the different refrigeration requirements of the two working conditions. Low-temperature low-pressure refrigerant from the outlet of the evaporator enters the gas-liquid separator through a pipeline; at this time, the first one-way valve is closed, the second one-way valve is opened, and the direct-cooling plate branch and the evaporator branch refrigerant are converged and then enter the electronic compressor through the gas-liquid separator, so that the refrigeration cycle is completed. In the refrigeration cycle, the one-way valve is opened or closed, the opening of the electronic expansion valve, the rotation speed of the electronic compressor and the condensing fan and the like are controlled in a centralized way by the heat pump air conditioner controller.
Under refrigeration working conditions, the indoor condenser and the evaporator air door of the HVAC module are opened, and the defrosting and demisting functions of the passenger cabin can be realized.
2. Heating working conditions:
under the heating working condition, the first throttle valve is fully closed, the second throttle valve is fully opened, after the refrigerant is compressed by the electronic compressor, the high-temperature and high-pressure refrigerant enters the indoor condenser in the HVAC module in the passenger cabin, at the moment, the air door of the indoor condenser of the HVAC module is opened, the air door of the evaporator is closed, and the refrigerant radiates heat to the passenger cabin through the indoor heat exchanger. The high-temperature refrigerant flowing through the indoor heat exchanger flows in from the port a, flows out from the port b, the electronic expansion valve III is opened, the low-temperature refrigerant flows in from the port c, and flows out from the port d, and the intermediate heat exchanger exchanges heat between the high-temperature refrigerant and the low-temperature refrigerant. The temperature of the high-temperature refrigerant is further reduced from 50-60 ℃ to 20-30 ℃, and the high-temperature refrigerant enters a direct cooling plate to heat a low-temperature battery; the low-temperature refrigerant temperature is improved, the superheat degree is further improved, and the improvement of the heating cycle COP is facilitated. At this time, the first throttle valve is fully closed, the second throttle valve is fully opened, the refrigerant passes through the first single-phase valve after being radiated by the direct cooling plate, enters the combined valve, the combined valve passage is closed at this time and works as the electronic expansion valve, the first electronic expansion valve and the second electronic expansion valve are both closed, the outdoor heat exchanger is used as an evaporator, absorbs heat from a low-temperature environment, enters the c port of the middle heat exchanger through the third electronic expansion valve, flows out from the d port after being heated, enters the electronic compressor through the gas-liquid separator, and completes the refrigeration cycle. In the heating cycle, the one-way valve is opened or closed, the opening of the electronic expansion valve, the rotation speed of the electronic compressor and the condensing fan and the like are controlled by the heat pump air conditioner controller in a centralized way.
3. Passenger cabin refrigeration and power battery heating working conditions:
the working condition is similar to the heating working condition, the air door of the indoor condenser is closed, the indoor condenser does not participate in heat exchange, the refrigerant is cooled in the intermediate heat exchanger, the temperature of the high-temperature high-pressure refrigerant is reduced, and the superheat degree of the low-temperature low-pressure superheated steam at the outlet of the outdoor heat exchanger is further improved. The opening of the first throttle valve is about 70% -90%, the opening of the second throttle valve is about 10% -30%, most of high-temperature and high-pressure refrigerant enters the combined valve through the first throttle valve, a small part of refrigerant passes through the direct cooling plate and heats the power battery, at the moment, the first check valve is fully opened, the second check valve is fully closed, the two parts of refrigerant are mixed in a pipeline and enter the outdoor heat exchanger to perform condensation heat exchange, the opening of the first electronic expansion valve and the opening of the third electronic expansion valve are determined by the refrigerating capacity of the passenger cabin and the heating capacity of the direct cooling plate, the second electronic expansion valve is fully closed, and the low-temperature and low-pressure refrigerant from the middle heat exchange and the outlet of the evaporator enters the electronic compressor through the gas-liquid separator to complete circulation.
4. Passenger cabin heating and power battery cooling conditions:
the working condition is similar to the refrigerating working condition, the air door of the evaporator is closed, the evaporator does not participate in heat exchange, the air door of the indoor condenser is opened, the indoor condenser heats the passenger cabin, the third electronic expansion valve is fully closed, the middle heat exchanger does not participate in heat exchange, the first throttle valve is fully opened, the second throttle valve is fully closed, the refrigerant enters the outdoor heat exchanger through the combination valve, and the outdoor heat exchanger serves as a condenser for heat dissipation of high-temperature high-pressure refrigeration. The first electronic expansion valve is fully closed, the second electronic expansion valve is used for adjusting the opening degree according to the refrigerating capacity of the direct-cooling plate, the first one-way valve is closed, the second one-way valve is opened, and the refrigerant enters the electronic compressor through the gas-liquid separator to complete circulation.
The above examples are given for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it intended that all embodiments be exhaustive, but obvious variations or modifications that come within the scope of the utility model are possible.
Claims (4)
1. An integrated power battery thermal management's heat pump air conditioning system that contains intermediate heat exchanger, its characterized in that: the outdoor heat exchanger is connected in series with a combination valve, the outdoor heat exchanger is connected in series with a second electronic expansion valve, the second electronic expansion valve is connected in series with a direct cooling plate, the direct cooling plate is connected in series with a first one-way valve, the first one-way valve is connected in series with the combination valve, and the components form a large loop; a second one-way valve is communicated between the direct cooling plate and the first one-way valve, the second one-way valve is connected in series with a gas-liquid separator and an electronic compressor, the other end of the electronic compressor is communicated with an indoor condenser, and the indoor condenser is communicated with an interface a of the intermediate heat exchanger; a third electronic expansion valve is communicated between the outdoor heat exchanger and the second electronic expansion valve, and the third electronic expansion valve is communicated with a c interface of the intermediate heat exchanger; the interface of the middle heat exchanger b is connected in parallel to a first throttle valve and a second throttle valve, the first throttle valve is connected between the first check valve and the combination valve connected in series, and the second throttle valve is connected between the second electronic expansion valve and the direct cooling plate; the interface of the intermediate heat exchanger d is connected between the second one-way valve and the gas-liquid separator; the outdoor heat exchanger is also communicated with a first electronic expansion valve which is communicated with an evaporator, and the evaporator is communicated between a second one-way valve and the gas-liquid separator.
2. A heat pump air conditioning system for integrated power cell thermal management comprising an intermediate heat exchanger as recited in claim 1, wherein: and a condensing fan is arranged outside the outdoor heat exchanger.
3. A heat pump air conditioning system for integrated power cell thermal management comprising an intermediate heat exchanger as recited in claim 1, wherein: and a blower is arranged outside the evaporator.
4. A heat pump air conditioning system for integrated power cell thermal management comprising an intermediate heat exchanger as recited in claim 1, wherein: the intermediate heat exchanger is of a plate type structure with high-efficiency heat exchange, four interfaces of the intermediate heat exchange are high-temperature and high-pressure refrigerant channels, and a cd interface is a low-temperature and low-pressure refrigerant channel.
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| CN202110963834.2A CN113771583B (en) | 2021-08-21 | 2021-08-21 | Heat pump air conditioning system with intermediate heat exchanger for integrated power battery thermal management |
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| CN202110963834.2A CN113771583B (en) | 2021-08-21 | 2021-08-21 | Heat pump air conditioning system with intermediate heat exchanger for integrated power battery thermal management |
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| CN113771583B true CN113771583B (en) | 2023-08-08 |
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| CN114655079A (en) * | 2022-04-29 | 2022-06-24 | 重庆长安新能源汽车科技有限公司 | System for delaying thermal runaway spread of battery pack, control method and automobile |
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| CN107436048A (en) * | 2017-08-25 | 2017-12-05 | 北京汽车股份有限公司 | The air-conditioning system and vehicle of vehicle |
| CN110949087A (en) * | 2018-09-26 | 2020-04-03 | 宝沃汽车（中国）有限公司 | Vehicle and heat pump system and method of vehicle |
| CN210154134U (en) * | 2019-07-08 | 2020-03-17 | 东风-派恩汽车铝热交换器有限公司 | Secondary heat exchange device for automobile air conditioner |
| CN112248743A (en) * | 2020-09-22 | 2021-01-22 | 艾泰斯热***研发（上海）有限公司 | Dual-temperature-zone outdoor heat exchanger heat pump system |
| CN112436653A (en) * | 2020-09-30 | 2021-03-02 | 杭州三花研究院有限公司 | Motor assembly, thermal management device and thermal management system |
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| CN113771583A (en) | 2021-12-10 |
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