CN116039326A - Multi-way valve thermal management system and vehicle - Google Patents

Multi-way valve thermal management system and vehicle Download PDF

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Publication number
CN116039326A
CN116039326A CN202211579928.0A CN202211579928A CN116039326A CN 116039326 A CN116039326 A CN 116039326A CN 202211579928 A CN202211579928 A CN 202211579928A CN 116039326 A CN116039326 A CN 116039326A
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CN
China
Prior art keywords
way valve
interface
branch
heat exchanger
heat
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Pending
Application number
CN202211579928.0A
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Chinese (zh)
Inventor
奚辉
张毅
余强元
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Shanghai Mahle Thermal Systems Co ltd
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Shanghai Mahle Thermal Systems Co ltd
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Priority to CN202211579928.0A priority Critical patent/CN116039326A/en
Publication of CN116039326A publication Critical patent/CN116039326A/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
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—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
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors

Abstract

The invention discloses a multi-way valve heat management system and a vehicle, wherein a heat exchanger, a low-temperature radiator, a condenser, a water heating PTC, a warm air core body and a power battery pack are all connected with the multi-way valve through flow passage plates to form a loop for circulating cooling liquid; the multi-way valve at least comprises a movable valve core for switching the pipelines to the following states: the motor electric control cooling device, the low-temperature radiator and the multi-way valve are connected in series to form a motor electric control branch; the heat exchanger is connected with the multi-way valve in series to form a heat exchanger branch; the power battery pack is connected with the multi-way valve in series to form a battery branch; the condenser, the water heating PTC and the warm air core are connected in series with the multi-way valve to form a passenger cabin heating branch; the motor electric control branch, the battery branch and the heat exchanger branch are mutually communicated through a multi-way valve to form a first loop; the passenger cabin heating branch forms a second loop through the bypass pipe. The application of the invention improves the integration level of the cooling liquid loop and reduces the number of parts of the thermal management system.

Description

Multi-way valve thermal management system and vehicle
Technical Field
The invention relates to the technical field of new energy vehicle thermal management, in particular to a multi-way valve thermal management system and a vehicle.
Background
Along with the continuous rising of fuel price, the permeability of new energy automobiles is also continuously improved. With the rising of the purchase enthusiasm of new energy automobiles, people pay more attention to the cruising and safety of the new energy automobiles.
The traditional fuel oil vehicle has single heat management function, fewer parts and simple system functions.
The new energy automobile is driven by electric energy, the cold and hot requirements of the passenger cabin, the temperature of the battery pack is balanced, electric energy is consumed during electric control cooling of the motor, and compared with a traditional fuel automobile, the system is more complex in energy management content. Therefore, thermal management is increasingly important in improving the energy utilization rate and guaranteeing the whole vehicle endurance and the safety of the battery pack.
Wherein the thermal management system comprises a refrigerant circuit and a coolant circuit, wherein the coolant circuit plays an important role in the new energy thermal management system.
The existing new energy automobile heat management system is mainly distributed, and functional components such as passenger cabins, batteries, motors and the like mainly depend on cooling liquid for heat exchange and are respectively arranged in different loops. In order to realize the communication between different loops, a plurality of three-way and four-way valves are used in the loops, and different system functions are realized through the combined switching of different water valves.
Because the parts of the thermal management system are distributed at different positions of the whole vehicle, the parts are connected through pipelines and then fixed on the whole vehicle, the parts are distributed, and the system integration level is low. For the whole vehicle factories, the materials are various, the occupied space is large, the system control is complex, and the problem of insufficient energy utilization is caused. Finally, the development period of the thermal management system is long, the cost is high, the whole vehicle is complex to assemble, and the maintenance is inconvenient.
Moreover, the motor of the new energy automobile is electrically controlled and the battery needs a severe working environment, and if the working environment temperature is high, the motor is possibly electrically controlled and the battery is possibly invalid, so that certain potential safety hazards are brought.
Therefore, in the whole vehicle thermal management system, how to improve the integration level of the cooling liquid loop, reduce the number of parts, and overall manage the dispersed thermal management system to reduce energy waste and reasonably dissipate heat of the electric motor and the battery is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the problems of low integration level of a cooling liquid loop, complex structure and inconvenient heat dissipation of a motor electric control and a battery in the prior art, the application provides a multi-way valve heat management system and a vehicle.
In order to achieve the aim, the invention discloses a multi-way valve heat management system which comprises a heat exchanger, a motor electric control cooling device, a condenser, a water heating PTC, a warm air core body and a power battery pack.
The heat exchanger, the motor electric control cooling device, the condenser, the water heating PTC, the heating core body and the power battery pack are all connected with the multi-way valve through flow passage plates to form a loop for circulating cooling liquid;
the multi-way valve comprises at least one movable valve core, and the communication among a plurality of pipelines is switched or closed by the movable valve core;
the multi-way valve at least comprises the movable valve core for switching a plurality of pipelines to the following states:
the motor electric control cooling device is connected with the multi-way valve in series to form a motor electric control branch;
the heat exchanger is connected with the multi-way valve in series to form a heat exchanger branch;
the power battery pack is connected with the multi-way valve in series to form a battery branch;
the condenser, the water heating PTC, the warm air core body and the multi-way valve are connected in series to form a passenger cabin heating branch;
the motor electric control branch, the battery branch and the heat exchanger branch are mutually communicated through the multi-way valve to form a first loop;
the passenger cabin heating branch is independently formed into a second loop, and the second loop is mutually isolated from the first loop.
The application of the invention improves the integration level of the cooling liquid loop, reduces the number of parts of the thermal management system, reduces the occupied space of the thermal management system, and comprehensively manages the dispersed thermal management system to reduce energy waste.
Furthermore, in the invention, the heat exchanger, the electric motor control cooling device and the power battery pack are connected in series to form a first loop, so that heat among the heat exchanger, the electric motor control cooling device and the power battery pack can be balanced, and redundant heat in the electric motor control cooling device and the power battery pack can be absorbed through the heat exchanger. The second loop is independently formed through the passenger cabin heating branch and is isolated from the first loop, so that the heat correlation between the passenger cabin heating branch and the first loop is reduced, and the temperatures between the two loops are mutually independent.
Preferably, the multi-way valve comprises a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface and a C8 interface;
the C1 interface and the C2 interface are respectively butted with an outlet and an inlet of the passenger cabin heating branch;
the C3 interface and the C4 interface are respectively butted with an inlet and an outlet of the battery branch;
the C5 interface and the C6 interface respectively correspond to an inlet and an outlet of the heat exchanger branch;
the C7 interface and the C8 interface respectively correspond to an inlet and an outlet of the electric control branch of the motor;
the C8 interface is communicated with the C3 interface, the C6 interface is communicated with the C7 interface, and the C4 interface is communicated with the C5 interface;
and the C1 interface and the C2 interface are completely closed between the outlet and the inlet of the passenger cabin heating branch.
Preferably, a first proportional three-way valve is arranged between the passenger cabin heating branch and the multi-way valve and used for distributing the flow of cooling liquid in a bypass pipe of the passenger cabin heating branch.
Preferably, the motor electric control branch is provided with a second proportional three-way valve, a low-temperature radiator and a short-circuit bypass are arranged in parallel between the motor electric control cooling device and the second proportional three-way valve, and the flow of the corresponding cooling liquid in the low-temperature radiator and the short-circuit bypass is distributed through the second proportional three-way valve.
Preferably, the electric control branch of the motor, the battery branch and the passenger cabin heating branch are all provided with cooling liquid circulating water pumps.
Preferably, a loop for flowing through the refrigerant is arranged between the heat exchanger and the condenser;
when the passenger cabin heating branch is in a passenger cabin heating or dehumidifying working condition, heat is from the condenser, if the heat is insufficient, the water heating PTC works to heat the cooling liquid in the passenger cabin heating branch, so that the requirement of warm air is met;
the refrigerant transfers the carried heat to the cooling liquid of the passenger cabin heating branch through the condenser.
More preferably, said circuit through which said refrigerant flows is provided with an evaporator, said warm air core being integral with said evaporator and provided with a blower; and/or the loose path flowing through the refrigerant is provided with an outdoor heat exchanger;
the blower, the warm air core body and the evaporator are arranged in the air conditioning box; the air blower is used for accelerating air passing through the warm air core body and the evaporator to realize heat exchange.
Preferably, a condensing fan is arranged at the low-temperature radiator;
the condensing fan is used for assisting in heat dissipation; and/or the number of the groups of groups,
the warm air core is provided with a blower, and the blower and the warm air core are arranged at the position of the warm air core; the air blower is used for accelerating air passing through the warm air core body and realizing heat exchange.
Preferably, the runner plate comprises a plurality of runners for conveying cooling liquid, the runners are arranged in parallel, one ends of the runners are connected with the multi-way valve, and the other ends of the runners are connected with the corresponding heat exchanger, the low-temperature radiator, the condenser, the warm air core or the power battery pack.
The invention also provides a vehicle, and the multi-way valve heat management system adopting any one of the above.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 2 shows a schematic diagram of the second loop heating or dehumidifying, in which the waste heat of the electric motor control branch is indirectly recovered to the passenger cabin or the electric motor is in a cooling working state in an embodiment of the invention.
Fig. 3 is a schematic diagram showing a state of shorting the second proportional three-way valve to the low-temperature radiator according to an embodiment of the invention.
Fig. 4 is a schematic diagram showing a second circuit cooling or blowing state formed by a passenger compartment heating branch circuit when the heat exchanger is not operated in an embodiment of the present invention.
Fig. 5 shows a schematic diagram of a refrigerant connection circuit in an embodiment of the invention.
FIG. 6 shows a schematic diagram of the interface arrangement of the multi-way valve in an embodiment of the invention.
FIG. 7 is a schematic diagram of the interface of the multi-way valve according to an embodiment of the present invention.
1, a heat exchanger; 2. an electric control cooling device of the motor; 3. a low temperature heat sink; 4. a condenser; 5. a water heating PTC; 6. a warm air core; 7. a power battery pack; 8. a cooling liquid circulating water pump; 9. an evaporator; 10. an electric control branch of the motor; 11. a battery branch; 12. a passenger cabin heating branch; 13. a heat exchanger branch; 14. an outdoor heat exchanger; 15. a first proportional three-way valve; 16. a bypass tube; 17. and a second proportional three-way valve.
Detailed Description
Examples
As shown in fig. 1 to 4, the multi-way valve heat management system comprises a heat exchanger 1, a motor electric control cooling device 2, a condenser 4, a water heating PTC5, a warm air core 6 and a power battery pack 7.
The heat exchanger 1, the motor electric control cooling device 2, the condenser 4, the water heating PTC5, the warm air core 6 and the power battery pack 7 are all connected with the multi-way valve through flow passage plates to form a loop for circulating cooling liquid;
the multi-way valve comprises at least one movable valve core, and the communication or closing among a plurality of pipelines is switched through the movable valve core;
the multi-way valve at least comprises a movable valve core for switching the pipelines to the following states:
the motor electric control cooling device 2 is connected with the multi-way valve in series to form a motor electric control branch circuit 10;
the heat exchanger 1 is connected with a multi-way valve in series to form a heat exchanger branch 13;
the power battery pack 7 is connected with the multi-way valve in series to form a battery branch 11;
the condenser 4, the water heating PTC5, the warm air core 6 and the multi-way valve are connected in series to form a passenger cabin heating branch 12;
the motor electric control branch circuit 10, the battery branch circuit 11 and the heat exchanger branch circuit 13 are mutually communicated through a multi-way valve to form a first loop;
the passenger compartment heating branch 12 alone forms a second circuit, which is isolated from the first circuit.
The application of the invention reduces the number of parts of the thermal management system by improving the integration level of the cooling liquid loop and comprehensively managing the scattered thermal management system to reduce the energy waste.
Furthermore, in the invention, the heat exchanger 1, the electric motor control cooling device 2 and the power battery pack 7 are connected in series to form a first loop, so that heat among the three can be balanced, and redundant heat in the electric motor control cooling device 2 and the power battery pack 7 can be absorbed through the heat exchanger 1. The second loop is formed separately from the first loop by the passenger compartment heating branch 12, so that the heat correlation between the passenger compartment heating branch 12 and the first loop is reduced, and the temperatures of the two loops are mutually independent.
In practical applications, the heat exchanger 1 is usually a plate heat exchanger, and a flow passage for a cooling liquid and a flow passage for a refrigerant are usually provided in the heat exchanger 1, so that the heat exchanger 1 mainly performs heat exchange between the cooling liquid and the refrigerant. The condenser 4 is usually an indirect condenser in practical application, and has four ports, i.e. I-COND, two ports being used for passing the cooling fluid and being connected to a circuit through which the cooling fluid flows; the other two ports are used to pass the refrigerant and are connected to the circuit through which the refrigerant flows. The water heating PTC5 plays a role in heating the cooling liquid. The cooling liquid exchanges heat with the air through the warm air core 6.
In some embodiments, a first proportional three-way valve 15 is provided between the passenger compartment heating branch 12 and the multi-way valve for distributing the flow of coolant in the bypass pipe 16 in the passenger compartment heating branch 12.
In some embodiments, the motor electric control branch 10 is provided with a second proportional three-way valve 17, and the low-temperature radiator 3 and the short-circuit bypass which are arranged in parallel are arranged between the motor electric control cooling device 2 and the second proportional three-way valve 17. The low-temperature radiator 3 mainly plays a role in heat dissipation. The low-temperature radiator 3 is connected in parallel with a short-circuit bypass controlled by a second proportional three-way valve 17, and the flow of the corresponding cooling liquid in the low-temperature radiator 3 and the short-circuit bypass is distributed through the second proportional three-way valve 17. When the cooling liquid flows through the low-temperature radiator 3, the second proportional three-way valve 17 is in a closed state; when the coolant passes through the short bypass without passing through the low-temperature radiator 3, the second proportional three-way valve 17 is in an open state.
When the movable valve core of the multi-way valve switches a plurality of pipelines to the state, the multi-way valve thermal management system can realize 3 working conditions, which are respectively:
working condition 1, heating or dehumidifying of the passenger cabin, weak cooling of the power battery pack 7 and transmission of electric control waste heat of the motor to the passenger cabin.
Working condition 2, heating or dehumidifying of the passenger cabin, power battery pack 7 and electric motor controlled waste heat recovery.
And 3, refrigerating the passenger cabin, weakly cooling the power battery pack 7, and cooling the motor electrically.
As shown in fig. 2, specifically, in the condition 1:
in the working condition 1, the second proportional three-way valve 17 is in a closed state, and the cooling liquid flows through the low-temperature radiator 3.
In the first loop, when the heat exchanger 1 works, the battery branch 11 and the heat exchanger branch 13 are connected in series with the electric motor control branch 10 to form the first loop, the power battery pack 7 in the battery branch 11 is in a weak cooling state, the electric motor control branch 10 carries out indirect waste heat recovery on the passenger cabin, in this state, the power battery pack 7 is in weak cooling requirement, and therefore the low-temperature radiator 3 is utilized for heat dissipation, and the electric motor control cooling device 2 also needs indirect waste heat recovery, so that heat is required to be brought to the condenser 4 positioned in the passenger cabin through the refrigerant loop in the heat exchanger 1.
In the first loop, when the heat exchanger 1 does not work, heat generated by the motor electric control cooling device 2 and the power battery pack 7 is radiated through the low-temperature radiator 3, and at the moment, the heat exchanger 1 is only used as a circulation pipeline of cooling liquid, and the cooling liquid and the refrigerant cannot be subjected to heat exchange, so that the heat cannot be brought into a passenger cabin. In this operating state, the operation of the other components than the motor electric control branch 10 is the same as the first circuit when the heat exchanger 1 is operated, except whether the heat exchanger 1 brings heat to the passenger cabin or not, and whether the waste heat generated by the motor electric control branch 10 can be indirectly recovered by the passenger cabin or not.
The passenger cabin heating branch 12 in the second loop forms a second loop independent loop operation through a bypass pipe 16 controlled by a first proportional three-way valve 15, and the second loop formed by the passenger cabin heating branch 12 heats or dehumidifies.
The operation of the passenger compartment heating branch 12 is divided into two operating states:
(1) In the heating state of the heat pump, in the passenger cabin heating branch 12, the high-temperature and high-pressure refrigerant from the compressor enters the condenser 4, in the condenser 4, the refrigerant releases heat to be a medium-temperature and high-pressure liquid refrigerant to flow out, the cooling liquid absorbs heat, the cooling liquid with raised temperature flows through the water heating PTC5 (at the moment, the water heating PTC5 only serves as a pipeline to realize circulation without temperature regulation) and enters the warm air core 6, under the action of the blower, the heat in the cooling liquid is released into the passenger cabin through the warm air core 6, the cooling liquid flowing out of the warm air core returns to the cooling liquid circulating water pump 8 through the V1V2 channel of the proportional three-way valve and enters the next circulation;
(2) In the water heating state, when the ambient temperature is reduced and the heating efficiency of the heat pump is reduced, the water heating PTC5 is required to be started at the same time, so that the cooling liquid in the passenger cabin heating branch 12 is heated to the target temperature, and the heating requirement of the passenger cabin is ensured.
Dehumidification of the passenger compartment of the vehicle can be realized in the second loop, the dehumidification needs to be started simultaneously with refrigeration and heating, and the refrigeration principle is as follows: the refrigerant flowing through the evaporator 9 absorbs heat in the passenger cabin through the evaporator 9, so that the cooling effect is achieved. The passenger cabin is heated by the condenser 4 to cool the liquid, and then the warm air core 6 is used for radiating the heat of the passenger cabin, and the aim of dehumidification can be achieved by heating and refrigerating simultaneously.
Referring to fig. 3, specifically, in condition 2:
in the working condition 2, the second proportional three-way valve 17 is in an open state, and the coolant passes through the short-circuit bypass without passing through the low-temperature radiator 3.
In the first loop, the heat exchanger 1 works, and the heat exchanger 1 exchanges heat between the heat generated by the electric motor control cooling device 2 and the power battery pack 7 through a cooling liquid pipeline and a refrigerant pipeline in the electric motor control cooling device, so that the heat is transferred to the condenser 4 arranged in the passenger cabin through the refrigerant loop, and heating of the second loop is assisted. Since the heat in the first circuit is recovered by the heat exchanger 1, the low-temperature radiator 3 is not required for heat dissipation. The second loop passenger compartment heating branch 12 heats or dehumidifies in the same manner as in condition 1.
Referring to fig. 4, specifically, in condition 3:
in the first loop, the heat exchanger 1 does not work, the power battery pack 7 in the battery branch 11 is in a weak cooling state, the electric motor control cooling device 2 in the electric motor control branch 10 can only be in a cooling working state, and the weak cooling of the power battery pack 7 and the cooling of the electric motor control cooling device 2 are completed through the low-temperature radiator 3. In the second circuit, the coolant does not flow through the second circuit, and cooling or blowing is performed in the passenger compartment by the evaporator 9 provided in the passenger compartment and the blower.
In certain embodiments, the multi-way valve includes a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface, and a C8 interface;
the C1 interface and the C2 interface are respectively connected with the outlet and the inlet of the passenger cabin heating branch 12;
the C3 interface and the C4 interface are respectively butted with an inlet and an outlet of the battery branch 11;
the C5 interface and the C6 interface respectively correspond to the inlet and the outlet of the heat exchanger branch 13;
the C7 interface and the C8 interface respectively correspond to an inlet and an outlet of the motor electric control branch circuit 10;
wherein the C8 interface and the C3 interface are communicated with each other, the C6 interface and the C7 interface are communicated with each other, and the C4 interface and the C5 interface are communicated with each other;
the C1 interface and the C2 interface are completely closed from the outlet and inlet of the passenger compartment heating branch 12.
In some embodiments, the C1 interface and the C2 interface are mutually communicated, so that the multi-way valve can be in butt joint with more loops in the existing environment, and the application scene of the multi-way valve is expanded, so that the thermal management system of the application can adapt to different system requirements.
In some embodiments, the electric control cooling device 2 and the low-temperature radiator 3 of the motor connected end to end are connected with a pipeline connected with the multi-way valve, and the condenser 4, the water heating PTC5 and the warm air core 6 which are connected in sequence are connected with the pipeline connected with the multi-way valve, and the pipeline connected with the multi-way valve by the power battery pack 7 is provided with a cooling liquid circulating water pump 8.
Specifically, a coolant circulating water pump 8 is disposed at the water inlet side of the power battery pack 7, and is used for providing power for the circulation of coolant in the battery branch 11; a cooling liquid circulating water pump 8 is arranged at the water inlet side of the motor electric control cooling device 2 and is used for providing power for cooling liquid circulation in the motor electric control branch circuit 10; a coolant circulation pump 8 is provided at the water inlet side of the condenser 4, and functions to power the coolant in the passenger compartment heating circuit 12.
Referring to fig. 5, in some embodiments, a circuit through which refrigerant flows is provided between the heat exchanger 1 and the condenser 4;
so that the heat exchange of the heat exchanger 1 and the condenser 4 is heat transfer by the refrigerant and the cooling liquid. When the passenger cabin heating loop 12 is in a passenger cabin heating or dehumidifying working condition, heat is from the condenser 4, and if the heat is insufficient, the water heating PTC5 works to heat the cooling liquid in the passenger cabin heating branch circuit so as to meet the requirement of warm air;
the refrigerant transfers the carried heat to the coolant of the passenger compartment heating circuit 12 through the condenser 4.
When heat is to be dissipated by the condenser 4, heat needs to be absorbed from another place, and the heat exchanger 1 serves as an outdoor heat exchanger, and may absorb a certain amount of heat from the cooling liquid. In the battery loop, if excessive heat is carried away by the cooling liquid in the battery pack, the refrigerant absorbs the heat through the heat exchanger 1, so that the temperature of the cooling liquid in the loop is reduced.
Further, by providing the refrigerant circuit between the heat exchanger 1 and the condenser 4, waste heat recovery of the heat exchanger 1 can be achieved, and when there is excessive heat in the heat exchanger branch 13 where the heat exchanger 1 is located, heat can be transferred to the condenser 4 located in the passenger compartment heating branch through the refrigerant circuit, and heat transfer and circulation can be promoted more.
As shown in fig. 5, in some embodiments, the circuit through which the refrigerant flows is further provided with an evaporator 9 and an outdoor heat exchanger 14. Specifically, the evaporator 9 is located inside the passenger compartment, and the outdoor heat exchanger 14 is located outside the passenger compartment. The refrigerant circuit shown in fig. 5 enables heating or cooling of the passenger compartment.
The refrigerant loop heats the passenger cabin by heating the condenser 4, and the working principle is as follows:
1. the heat exchanger 1 absorbs the heat in the heat exchanger branch 13 to the refrigerant loop, and can transfer the heat to the condenser 4 in the passenger cabin heating branch 12;
2. the outdoor environment warms the condenser 4, and the outdoor heat exchanger 14 transfers heat to the condenser 4 through the refrigerant circuit by absorbing the temperature of the external environment.
The refrigerating of the passenger cabin by the refrigerant loop is realized by cooling the evaporator 9, and the working principle is as follows: the refrigerant flowing through the outdoor heat exchanger 14 enters the evaporator 9, the evaporator 9 absorbs heat from the environment to evaporate the refrigerant, and the evaporator 9 is located in the passenger compartment, thereby realizing the cooling of the passenger compartment.
Therefore, in the working conditions 1 and 2, the passenger cabin is in a heating state under the action of the cooling liquid loop, dehumidification of the passenger cabin of the vehicle can be realized through the refrigerant circulation loop, and dehumidification of the passenger cabin is completed through the refrigerant circulation. The dehumidification principle is as follows: the refrigerant flowing through the evaporator 9 absorbs heat in the passenger compartment through the evaporator 9, thereby achieving the effect of cooling the condenser 4. Therefore, the passenger cabin is heated by the heat pump, and is refrigerated by the evaporator 9, so that the dehumidification purpose can be achieved.
The refrigerant and the cooling liquid in the present application are different mediums and serve different functions. Specifically, the refrigerant generally refers to a refrigerant, which is a working substance that achieves an active cooling effect by changing its state; the cooling liquid is usually a mixture of water and glycol, etc., which is a medium for passive heat exchange.
In some embodiments, the warm air core 6 and the evaporator 9 are assembled together, and a blower is arranged at the warm air core 6;
the blower, the warm air core 6 and the evaporator 9 are arranged in the air conditioning box;
the blower is used to accelerate the air passing through the warm air core 6 and the evaporator, achieving heat exchange.
In some embodiments, a condensing fan is provided at the low-temperature radiator 3;
the condensing fan is used for assisting heat dissipation.
Through setting up the air-blower, strengthened the circulation of air in the vehicle passenger cabin to in operating mode 3, can also realize blowing of vehicle passenger cabin, in operating mode 1, 2, can also realize dehumidification of vehicle passenger cabin.
Referring to fig. 6, in some embodiments in which the multi-way valve is an eight-way valve, the C1-to-C8-ports are arranged in a nine-way format to save space required for the eight-way valve. Corresponding to the specific position of the Sudoku, the C1 interface is positioned in the first column of the second row, the C2 interface is positioned in the first column of the third row, the C3 interface is positioned in the second column of the second row, the C4 interface is positioned in the second column of the third row, the C5 interface is positioned in the third column of the third row, the C6 interface is positioned in the second column of the first row, the C7 interface is positioned in the third column of the first row, and the C8 interface is positioned in the third column of the second row. The interfaces of the first row and the first column can be communicated with other interfaces, so that the connection mode of the eight-way valve can be expanded.
Referring to FIG. 7, in some embodiments, the C1-C8 interface is specifically connected as shown in FIG. 7.
In some embodiments, the flow channel plate comprises a plurality of flow channels for conveying cooling liquid, the flow channels are mutually parallel, one ends of the flow channels are connected with the multi-way valve, and the other ends of the flow channels are connected with the corresponding heat exchanger 1, the motor electric control cooling device 2, the low-temperature radiator 3, the condenser 4, the water heating PTC, the warm air core 6 or the power battery pack 7.
The invention also provides a vehicle, and a multi-way valve thermal management system adopting any one of the above.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (10)

1. The multi-way valve thermal management system comprises a heat exchanger (1), a motor electric control cooling device (2), a condenser (4), a water heating PTC (5), a warm air core body (6) and a power battery pack (7); the method is characterized in that:
the heat exchanger (1), the motor electric control cooling device (2), the condenser (4), the water heating PTC (5), the warm air core body (6) and the power battery pack (7) are all connected with a multi-way valve through a runner plate to form a loop for circulating cooling liquid;
the multi-way valve comprises at least one movable valve core, and the communication among a plurality of pipelines is switched or closed through the movable valve core;
the multi-way valve at least comprises the movable valve core for switching a plurality of pipelines to the following states:
the motor electric control cooling device (2) is connected with the multi-way valve in series to form a motor electric control branch circuit (10);
the heat exchanger (1) is connected with the multi-way valve in series to form a heat exchanger branch (13);
the power battery pack (7) is connected with the multi-way valve in series to form a battery branch (11);
the condenser (4), the water heating PTC (5), the warm air core (6) and the multi-way valve are connected in series to form a passenger cabin heating branch (12);
the motor electric control branch circuit (10), the battery branch circuit (11) and the heat exchanger branch circuit (13) are mutually communicated through the multi-way valve to form a first loop;
the passenger compartment heating branch (12) forms a second loop alone, the second loop being isolated from the first loop.
2. The multi-way valve thermal management system of claim 1, wherein the multi-way valve comprises a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface, and a C8 interface;
the C1 interface and the C2 interface are respectively butted with an outlet and an inlet of the passenger cabin heating branch (12);
the C3 interface and the C4 interface are respectively abutted with an inlet and an outlet of the battery branch (11);
the C5 interface and the C6 interface respectively correspond to an inlet and an outlet of the heat exchanger branch (13);
the C7 interface and the C8 interface respectively correspond to an inlet and an outlet of the motor electric control branch circuit (10);
the C8 interface is communicated with the C3 interface, the C6 interface is communicated with the C7 interface, and the C4 interface is communicated with the C5 interface;
the C1 interface and the C2 interface are completely closed with the outlet and inlet of the passenger cabin heating branch (12).
3. The multi-way valve thermal management system of claim 1, wherein a first proportional three-way valve (15) is provided between the passenger compartment heating branch (12) and the multi-way valve for distributing the flow of cooling liquid in a bypass pipe (16) in the passenger compartment heating branch (12).
4. The multi-way valve thermal management system according to claim 1, wherein the motor electric control branch circuit (10) is provided with a second proportional three-way valve (17), a low-temperature radiator (3) and a short-circuit bypass are arranged in parallel between the motor electric control cooling device (2) and the second proportional three-way valve (17), and the flow rates of the corresponding cooling liquid in the low-temperature radiator (3) and the short-circuit bypass are distributed through the second proportional three-way valve (17).
5. The multi-way valve thermal management system according to claim 1, wherein the motor electric control branch (10), the battery branch (11) and the passenger compartment heating branch (12) are all provided with a coolant circulating water pump (8).
6. Multi-way valve thermal management system according to claim 1, characterized in that a circuit for the flow of refrigerant is provided between the heat exchanger (1) and the condenser (4);
when the passenger cabin heating branch circuit (12) is in a passenger cabin heating or dehumidifying working condition, heat comes from the condenser (4), and if the heat is insufficient, the water heating PTC (5) works to heat the cooling liquid in the passenger cabin heating branch circuit (12) so as to meet the requirement of warm air;
the refrigerant transfers the carried heat through the condenser (4) to the cooling liquid of the passenger compartment heating branch (12).
7. A multi-way valve thermal management system according to claim 6, wherein said circuit through which said refrigerant flows is provided with an evaporator (9), said warm air core (6) being integral with said evaporator (9) and provided with a blower; and/or the circuit through which the refrigerant flows is provided with an outdoor heat exchanger (14); the blower, the warm air core (6) and the evaporator (9) are arranged in an air conditioning box; the blower is used for accelerating the air passing through the warm air core (6) and the evaporator to realize heat exchange.
8. The multi-way valve thermal management system according to claim 1, characterized in that a condensing fan is provided at the low temperature radiator (3);
the condensing fan is used for assisting in heat dissipation; and/or the number of the groups of groups,
a blower is arranged at the warm air core (6), and the blower and the warm air core (6); the blower is used for accelerating air passing through the warm air core body (6) to realize heat exchange.
9. The multi-way valve thermal management system according to claim 1, wherein the runner plate comprises a plurality of runners for conveying cooling liquid, the runners are arranged in parallel with each other, one ends of the runners are connected with the multi-way valve, and the other ends of the runners are connected with the corresponding heat exchanger (1), the motor electric control cooling device (2), the condenser (4), the water heating PTC (5), the warm air core (6) or the power battery pack (7).
10. A vehicle employing a multi-way valve thermal management system according to any one of claims 1 to 9.
CN202211579928.0A 2022-12-09 2022-12-09 Multi-way valve thermal management system and vehicle Pending CN116039326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211579928.0A CN116039326A (en) 2022-12-09 2022-12-09 Multi-way valve thermal management system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211579928.0A CN116039326A (en) 2022-12-09 2022-12-09 Multi-way valve thermal management system and vehicle

Publications (1)

Publication Number Publication Date
CN116039326A true CN116039326A (en) 2023-05-02

Family

ID=86115296

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211579928.0A Pending CN116039326A (en) 2022-12-09 2022-12-09 Multi-way valve thermal management system and vehicle

Country Status (1)

Country Link
CN (1) CN116039326A (en)

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