Multi-port valve thermal management system and vehicle

Abstract

This invention discloses a multi-way valve thermal management system and a vehicle. A heat exchanger, a cryogenic radiator, a condenser, a PTC water heater, a heater core, and a power battery pack are all connected to a multi-way valve via flow channels to form a circuit for coolant flow. The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states: a motor-controlled cooling device and a cryogenic radiator are connected in series with the multi-way valve to form a motor-controlled branch; a heat exchanger is connected in series with the multi-way valve to form a heat exchanger branch; a power battery pack is connected in series with the multi-way valve to form a battery branch; the condenser, PTC water heater, and heater core are connected in series with the multi-way valve to form a passenger compartment heating branch; the motor-controlled branch, battery branch, and heat exchanger branch are interconnected via the multi-way valve to form a first circuit; and the passenger compartment heating branch is connected via a bypass pipe to form a second circuit. The application of this invention improves the integration of the coolant circuit and reduces the number of components in the thermal management system.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for new energy vehicles, and particularly to a multi-port valve thermal management system and transportation vehicles. Background Technology

[0002] With the surge in enthusiasm for purchasing new energy vehicles, people are paying increasing attention to their range and safety.

[0003] Traditional gasoline vehicles have limited thermal management functions, fewer system components, and relatively simple system functions.

[0004] New energy vehicles are powered by electricity, and the heating and cooling needs of the passenger compartment, the temperature balance of the battery pack, and the cooling of the motor and electronic control all require electrical energy. Compared to traditional fuel vehicles, energy management involves more aspects and the system is more complex. Therefore, thermal management is becoming increasingly important in improving energy efficiency and ensuring the vehicle's range and battery pack safety.

[0005] The thermal management system includes a refrigerant circuit and a coolant circuit, with the coolant circuit playing a crucial role in the new energy thermal management system.

[0006] Existing thermal management systems for new energy vehicles are still mainly decentralized, with heat exchange between functional components such as the passenger compartment, battery, and motor relying primarily on coolant, and each operating in a separate circuit. To achieve connectivity between these circuits, multiple three-way and four-way valves are used within each circuit, with different system functions achieved through combinations of these valves.

[0007] Because the components of the thermal management system are distributed across different locations throughout the vehicle, connected by pipelines and then fixed to the vehicle, the system integration is low. For vehicle manufacturers, this results in a wide variety of materials, a large space requirement, and complex system control, leading to insufficient energy utilization. Ultimately, this results in a long development cycle, high cost, complex vehicle assembly, and inconvenient maintenance for the thermal management system.

[0008] Furthermore, the motors, electronic controls, and batteries of new energy vehicles require relatively harsh working environments. If the operating temperature is high, it may cause the motors, electronic controls, and batteries to fail, posing certain safety hazards.

[0009] Therefore, in the vehicle thermal management system, how to improve the integration of the coolant circuit, reduce the number of parts, and manage the dispersed thermal management system in a unified manner to reduce energy waste and provide reasonable heat dissipation for the motor, electronic control system and battery has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0010] In view of the problems of low integration of coolant circuit, complex structure and inconvenient heat dissipation of motor, electronic control and battery in the existing technology, this application provides a multi-way valve thermal management system and a vehicle.

[0011] To achieve the above objectives, the present invention discloses a multi-way valve thermal management system, including a heat exchanger, a motor electronic control cooling device, a condenser, a water heating PTC, a heater core, and a power battery pack.

[0012] The heat exchanger, the motor electronic control cooling device, the condenser, the water heating PTC, the heater core and the power battery pack are all connected to a multi-way valve through a flow channel plate to form a circuit for the flow of coolant;

[0013] The multi-way valve includes at least one movable valve core, which is used to switch the connection or closure between multiple pipelines;

[0014] The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states:

[0015] The motor electronic control cooling device is connected in series with the multi-way valve to form a motor electronic control branch;

[0016] The heat exchanger and the multi-way valve are connected in series to form a heat exchanger branch;

[0017] The power battery pack and the multi-way valve are connected in series to form a battery branch;

[0018] The condenser, the PTC water heater, the heater core, and the multi-way valve are connected in series to form a heating branch circuit for the passenger compartment;

[0019] The motor control branch, the battery branch, and the heat exchanger branch are interconnected through the multi-way valve to form a first circuit;

[0020] The crew cabin heating branch forms a separate second circuit, which is isolated from the first circuit.

[0021] The application of this invention improves the integration of the coolant circuit, reduces the number of components in the thermal management system, shrinks the space occupied by the thermal management system, and unifies the management of the dispersed thermal management system to reduce energy waste.

[0022] Furthermore, in this invention, a first loop is formed by connecting the heat exchanger, the motor control cooling device, and the power battery pack in series, thereby enabling the heat among the three components to be balanced and allowing the heat exchanger to absorb excess heat from the motor control cooling device and the power battery pack. A second loop is formed separately from the first loop through the passenger compartment heating branch, reducing the heat correlation between the passenger compartment heating branch and the first loop, and making the temperatures of the two loops independent.

[0023] Preferably, the multi-way valve includes interfaces C1, C2, C3, C4, C5, C6, C7, and C8.

[0024] The C1 interface and the C2 interface are respectively connected to the outlet and inlet of the crew cabin heating branch;

[0025] The C3 interface and the C4 interface are respectively connected to the inlet and outlet of the battery branch;

[0026] The C5 interface and the C6 interface correspond to the inlet and outlet of the heat exchanger branch, respectively;

[0027] The C7 interface and the C8 interface correspond to the inlet and outlet of the motor control branch, respectively;

[0028] Specifically, the C8 interface and the C3 interface are interconnected, the C6 interface and the C7 interface are interconnected, and the C4 interface and the C5 interface are interconnected.

[0029] The outlet and inlet of the crew cabin heating branch are completely closed between the C1 interface and the C2 interface.

[0030] Preferably, a first proportional three-way valve is provided between the crew compartment heating branch and the multi-way valve to distribute the flow rate of coolant in the bypass pipe of the crew compartment heating branch.

[0031] Preferably, the motor control branch is equipped with a second proportional three-way valve, and a low-temperature radiator and a short-circuit bypass are connected in parallel between the motor control cooling device and the second proportional three-way valve. The flow rate of the corresponding coolant in the low-temperature radiator and the short-circuit bypass is distributed through the second proportional three-way valve.

[0032] Preferably, the motor control branch, the battery branch, and the passenger compartment heating branch are all equipped with coolant circulating water pumps.

[0033] Preferably, a circuit for refrigerant flow is provided between the heat exchanger and the condenser;

[0034] When the passenger compartment heating branch is in passenger compartment heating or dehumidification mode, the heat comes from the condenser. If the heat is insufficient, the water heating PTC will work to heat the coolant in the passenger compartment heating branch to meet the demand for warm air.

[0035] The refrigerant carries heat and transfers it through the condenser to the coolant in the crew compartment heating circuit.

[0036] More preferably, the circuit through which the refrigerant flows is provided with an evaporator, the warm air core is mounted together with the evaporator and is provided with a blower; and / or, the circuit through which the refrigerant flows is provided with an outdoor heat exchanger;

[0037] The blower, the heating core, and the evaporator are installed inside the air conditioning unit; the blower is used to accelerate the air passing through the heating core and the evaporator to achieve heat exchange.

[0038] Preferably, a condenser fan is provided at the low-temperature radiator;

[0039] The condenser fan is used for auxiliary heat dissipation; and / or,

[0040] A blower is provided at the heating core, and the blower and the heating core are connected; the blower is used to accelerate the air passing through the heating core to achieve heat exchange.

[0041] Preferably, the flow channel plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in parallel to each other, and one end of each is connected to the multi-way valve, and the other end of each is connected to the corresponding heat exchanger, the low-temperature radiator, the condenser, the heater core, or the power battery pack.

[0042] The present invention also provides a means of transportation employing the multi-port valve thermal management system described in any one of the above claims.

[0043] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0044] Figure 1 A schematic diagram of an embodiment of the present invention is shown.

[0045] Figure 2 This diagram illustrates a second circuit for heating or dehumidifying in one embodiment of the present invention, where the waste heat from the motor and electronic control branch is indirectly recovered to the passenger compartment or the motor and electronic control are in a cooling operation state.

[0046] Figure 3 This diagram illustrates the state of the second proportional three-way valve short-circuited to the low-temperature radiator in one embodiment of the present invention.

[0047] Figure 4 This diagram illustrates a second loop cooling or blowing state formed by the crew cabin heating branch when the heat exchanger is not working in one embodiment of the present invention.

[0048] Figure 5 A schematic diagram of the refrigerant connection circuit is shown in one embodiment of the present invention.

[0049] Figure 6This diagram illustrates the interface arrangement of a multi-way valve in one embodiment of the present invention.

[0050] Figure 7 The diagram shows the interface connection method of a multi-way valve in one embodiment of the present invention.

[0051] The components include: 1. Heat exchanger; 2. Motor and electronic control cooling device; 3. Low-temperature radiator; 4. Condenser; 5. PTC water heating system; 6. Heater core; 7. Power battery pack; 8. Coolant circulating water pump; 9. Evaporator; 10. Motor and electronic control branch; 11. Battery branch; 12. Passenger compartment heating branch; 13. Heat exchanger branch; 14. Outdoor heat exchanger; 15. First proportional three-way valve; 16. Bypass pipe; 17. Second proportional three-way valve. Detailed Implementation

[0052] Example

[0053] like Figures 1 to 4 As shown, the multi-port valve thermal management system includes a heat exchanger 1, a motor and electronic control cooling device 2, a condenser 4, a water heating PTC 5, a heater core 6, and a power battery pack 7.

[0054] Among them, heat exchanger 1, motor and electronic control cooling device 2, condenser 4, water heating PTC 5, heater core 6 and power battery pack 7 are all connected to multi-way valve through flow channel plate to form a circuit for coolant circulation.

[0055] A multi-way valve includes at least one movable valve core, which switches the connection or closure between multiple pipelines.

[0056] A multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states:

[0057] The motor control cooling device 2 is connected in series with the multi-way valve to form the motor control branch 10;

[0058] Heat exchanger 1 is connected in series with a multi-way valve to form heat exchanger branch 13;

[0059] The power battery pack 7 is connected in series with the multi-way valve to form the battery branch 11;

[0060] The condenser 4, water heating PTC 5, and heater core 6 are connected in series with the multi-way valve to form the crew cabin heating branch circuit 12;

[0061] The motor control branch 10, the battery branch 11, and the heat exchanger branch 13 are interconnected through a multi-way valve to form a first circuit.

[0062] The crew cabin heating branch circuit 12 forms a separate second circuit, which is isolated from the first circuit.

[0063] The application of this invention reduces energy waste by improving the integration of the coolant circuit, reducing the number of components in the thermal management system, and managing the dispersed thermal management system in a unified manner.

[0064] Furthermore, in this invention, the heat exchanger 1, the motor-controlled cooling device 2, and the power battery pack 7 are connected in series to form a first loop, thereby enabling the heat among the three to be balanced, and allowing the heat exchanger 1 to absorb excess heat from the motor-controlled cooling device 2 and the power battery pack 7. A second loop is formed separately by the passenger compartment heating branch 12 and isolated from the first loop, reducing the heat correlation between the passenger compartment heating branch 12 and the first loop, making the temperatures of the two loops independent.

[0065] In practical applications, heat exchanger 1 is typically a plate heat exchanger. It usually contains channels for the coolant and refrigerant, thus its primary function is to facilitate heat exchange between the coolant and refrigerant. Condenser 4 is typically an indirect condenser (I-COND), with four ports: two for coolant flow connected to the coolant circuit, and two for refrigerant flow connected to the refrigerant circuit. The PTC heater 5 heats the coolant. The coolant exchanges heat with the air through the heater core 6.

[0066] In some embodiments, a first proportional three-way valve 15 is provided between the crew compartment heating branch 12 and the multi-way valve to distribute the flow rate of coolant in the bypass pipe 16 in the crew compartment heating branch 12.

[0067] In some embodiments, the motor control branch 10 is equipped with a second proportional three-way valve 17. A low-temperature radiator 3 and a short-circuit bypass are connected in parallel between the motor control cooling device 2 and the second proportional three-way valve 17. The low-temperature radiator 3 primarily serves to dissipate heat. The low-temperature radiator 3 is connected in parallel to a short-circuit bypass controlled by the second proportional three-way valve 17, which distributes the flow rate of coolant between the low-temperature radiator 3 and the short-circuit bypass. When coolant flows through the low-temperature radiator 3, the second proportional three-way valve 17 is closed; when coolant flows through the short-circuit bypass instead of the low-temperature radiator 3, the second proportional three-way valve 17 is open.

[0068] When the movable valve core of the multi-way valve switches multiple pipelines to the above state, the multi-way valve thermal management system of this application can achieve three operating conditions, namely:

[0069] Operating condition 1: Heating or dehumidifying the passenger compartment, weak cooling of the power battery pack 7, and waste heat from the motor and electronic control system are transferred to the passenger compartment.

[0070] Operating condition 2: Heating or dehumidifying the passenger compartment, and recovering waste heat from the power battery pack 7 and the motor and electronic control system.

[0071] Operating condition 3: Cooling of the passenger compartment, weak cooling of the power battery pack 7, and cooling of the motor and electronic control system.

[0072] like Figure 2 As shown, specifically in operating condition 1:

[0073] In operating condition 1, the second proportional three-way valve 17 is in the closed state, and the coolant flows through the low-temperature radiator 3.

[0074] In the first loop, when the heat exchanger 1 is working, the battery branch 11, the heat exchanger branch 13, and the motor and electronic control branch 10 are connected in series to form the first loop. The power battery pack 7 in the battery branch 11 is in a weak cooling state. The motor and electronic control branch 10 performs indirect waste heat recovery from the passenger compartment. In this state, the power battery pack 7 has a weak cooling requirement, so the low-temperature radiator 3 is used for heat dissipation. The motor and electronic control cooling device 2 also needs indirect waste heat recovery, so it is also necessary to transfer heat to the condenser 4 located in the passenger compartment through the refrigerant circuit in the heat exchanger 1.

[0075] In the first loop, when heat exchanger 1 is not working, the heat generated by the motor and electronic control cooling device 2 and the power battery pack 7 is dissipated through the low-temperature radiator 3. At this time, heat exchanger 1 only serves as a flow pipe for coolant and does not exchange heat between coolant and refrigerant, thus preventing heat from being carried into the passenger compartment. In this operating state, the operation of other components, except for the motor and electronic control branch 10, is the same as in the first loop when heat exchanger 1 is working. The difference lies in whether heat exchanger 1 carries heat to the passenger compartment and whether the waste heat generated by the motor and electronic control branch 10 can be indirectly recovered by the passenger compartment.

[0076] In the second circuit, the crew cabin heating branch 12 forms a separate second circuit through a bypass pipe 16 controlled by the first proportional three-way valve 15. The second circuit formed by the crew cabin heating branch 12 heats or dehumidifies.

[0077] The operation of the crew cabin heating branch circuit 12 is divided into two working states:

[0078] (1) In the heat pump heating mode, 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, on the refrigerant side, the refrigerant releases heat and becomes a medium temperature and high pressure liquid refrigerant that flows out. On the coolant side, the coolant absorbs heat and the temperature rises. The coolant flows through the water heating PTC5 (at this time, the water heating PTC5 only serves as a pipeline to achieve circulation and does not perform temperature regulation) and enters the heater core 6. Under the action of the blower, the heat in the coolant is released into the passenger cabin through the heater core 6. The coolant flowing out of the heater core returns to the coolant circulating water pump 8 through the V1V2 channel of the proportional three-way valve and enters the next cycle.

[0079] (2) When the ambient temperature drops and the efficiency of the heat pump decreases, the water heating PTC5 needs to be started at the same time to heat the coolant in the passenger compartment heating branch 12 to the target temperature to ensure the heating requirements of the passenger compartment.

[0080] The second circuit can also dehumidify the vehicle's passenger compartment. Dehumidification requires both cooling and heating to be activated simultaneously. The cooling principle is as follows: the refrigerant flowing through the evaporator 9 absorbs heat from the passenger compartment, achieving a cooling effect. The passenger compartment heats the coolant through the condenser 4, and then dissipates heat to the passenger compartment through the heater core 6. By simultaneously heating and cooling, the purpose of dehumidification can be achieved.

[0081] refer to Figure 3 Specifically, in operating condition 2:

[0082] In operating condition 2, the second proportional three-way valve 17 is in the open state, and the coolant does not pass through the low-temperature radiator 3 but passes through the short-circuit bypass.

[0083] In the first loop, heat exchanger 1 operates, exchanging heat generated by the motor control cooling device 2 and the power battery pack 7 through the internal coolant and refrigerant lines. This heat is then transferred via the refrigerant loop to the condenser 4 located in the passenger compartment, assisting in the heating of the second loop. Since the heat in the first loop is recovered through heat exchanger 1, the low-temperature radiator 3 is not required for heat dissipation. The second loop passenger compartment heating branch 12 provides heating or dehumidification on the same principle as in condition 1.

[0084] refer to Figure 4 Specifically, in operating condition 3:

[0085] In the first circuit, heat exchanger 1 is not working, the power battery pack 7 in battery branch 11 is in a weak cooling state, and the motor control cooling device 2 in motor control branch 10 can only be in a cooling working state. The weak cooling of the power battery pack 7 and the cooling of the motor control cooling device 2 are both completed by the low-temperature radiator 3. In the second circuit, the coolant does not flow through the second circuit. The passenger compartment is cooled or ventilated by the evaporator 9 and the blower located in the passenger compartment.

[0086] In some embodiments, the multi-way valve includes ports C1, C2, C3, C4, C5, C6, C7, and C8.

[0087] The C1 and C2 interfaces are respectively connected to the outlet and inlet of the crew cabin heating branch 12;

[0088] The C3 and C4 interfaces are respectively connected to the inlet and outlet of battery branch 11;

[0089] C5 and C6 interfaces correspond to the inlet and outlet of heat exchanger branch 13, respectively;

[0090] Interfaces C7 and C8 correspond to the inlet and outlet of motor control branch 10, respectively;

[0091] Among them, C8 and C3 interfaces are interconnected, C6 and C7 interfaces are interconnected, and C4 and C5 interfaces are interconnected.

[0092] The C1 and C2 interfaces are completely closed to the outlet and inlet of the crew cabin heating branch 12.

[0093] In some embodiments, the C1 and C2 interfaces are interconnected, enabling the multi-way valve to interface with more loops in the existing environment, expanding the application scenarios of the multi-way valve, and enabling the thermal management system of this application to adapt to different system requirements.

[0094] In some embodiments, a coolant circulating water pump 8 is provided on the pipelines connecting the motor control cooling device 2 and the low-temperature radiator 3 (connected end to end) to the multi-way valve, on the pipelines connecting the condenser 4, the water heating PTC 5 and the heater core 6 (connected in sequence) to the multi-way valve, and on the pipeline connecting the power battery pack 7 to the multi-way valve.

[0095] Specifically, a coolant circulating water pump 8 is installed on the inlet side of the power battery pack 7, and its function is to provide power for the circulation of coolant in the battery branch 11; a coolant circulating water pump 8 is installed on the inlet side of the motor electronic control cooling device 2, and its function is to provide power for the circulation of coolant in the motor electronic control branch 10; a coolant circulating water pump 8 is installed on the inlet side of the condenser 4, and its function is to provide power for the coolant in the passenger compartment heating circuit 12.

[0096] refer to Figure 5 In some embodiments, a refrigerant flow loop is provided between the heat exchanger 1 and the condenser 4;

[0097] Thus, the heat exchange between heat exchanger 1 and condenser 4 is achieved through heat transfer via refrigerant and coolant. When the crew cabin heating circuit 12 is in crew cabin heating or dehumidification mode, the heat comes from condenser 4. If the heat is insufficient, the water-cooled PTC 5 operates to heat the coolant in the crew cabin heating branch to meet the demand for warm air.

[0098] The refrigerant carries heat and transfers it to the coolant in the crew compartment heating circuit 12 via the condenser 4.

[0099] When heat needs to be dissipated through condenser 4, it needs to absorb heat from other sources. Heat exchanger 1, as an outdoor heat exchanger, can also absorb some heat from the coolant. In the battery circuit, if there is excess heat in the battery pack, it is carried away by the coolant and then absorbed by the refrigerant through heat exchanger 1, thereby lowering the coolant temperature in the circuit.

[0100] Furthermore, by setting up a refrigerant circuit between heat exchanger 1 and condenser 4, waste heat recovery of heat exchanger 1 can be achieved. When there is excess heat in heat exchanger branch 13 where heat exchanger 1 is located, the heat can be transferred to condenser 4 located in the crew cabin heating branch through the refrigerant circuit, which can further promote heat transfer and circulation.

[0101] like Figure 5 As shown, in some embodiments, the refrigerant circuit also includes 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. Figure 5 The refrigerant circuit shown can achieve heating or cooling of the crew cabin.

[0102] The refrigerant circuit heats the crew compartment by raising the temperature of condenser 4. The working principle is as follows:

[0103] 1. Waste heat recovery raises the temperature of condenser 4. Heat exchanger 1 absorbs heat from heat exchanger branch 13 into refrigerant circuit and can transfer heat to condenser 4 located in crew cabin heating branch 12.

[0104] 2. The outdoor environment causes the condenser 4 to heat up. The outdoor heat exchanger 14 absorbs the temperature of the outside environment and transfers the heat to the condenser 4 through the refrigerant circuit.

[0105] The refrigerant circuit cools the passenger compartment by cooling the evaporator 9. 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 and causes the refrigerant to vaporize. The evaporator 9 is located inside the passenger compartment, thereby achieving the cooling of the passenger compartment.

[0106] Therefore, in operating conditions 1 and 2, the passenger compartment is in a heating state under the action of the coolant circuit. Through the refrigerant circulation circuit, dehumidification of the passenger compartment is also achieved. The dehumidification principle is as follows: the refrigerant flowing through evaporator 9 absorbs heat from the passenger compartment, thus cooling the condenser 4. Therefore, the passenger compartment utilizes a heat pump for heating and evaporator 9 for cooling, achieving the purpose of dehumidification.

[0107] It should be noted that the refrigerant and coolant in this application are different media and play different roles. Specifically, refrigerant usually refers to a cooling medium, which is a working substance that achieves an active cooling effect by changing its own state; coolant usually refers to a mixture of water and ethylene glycol, etc., which is a medium for passive heat exchange.

[0108] In some embodiments, the warm air core 6 is assembled with the evaporator 9, and a blower is provided at the warm air core 6;

[0109] The blower, the heater core 6, and the evaporator 9 are installed inside the air conditioning unit;

[0110] The blower is used to accelerate the air passing through the warm air core 6 and the evaporator to achieve heat exchange.

[0111] In some embodiments, a condenser fan is provided at the low-temperature radiator 3;

[0112] A condenser fan is used to assist in heat dissipation.

[0113] By installing a blower, air circulation in the passenger compartment of the vehicle is enhanced, thus enabling air blowing in the passenger compartment in operating condition 3, and dehumidification in the passenger compartment in operating conditions 1 and 2.

[0114] refer to Figure 6 In some embodiments where the multi-way valve is an eight-way valve, the C1 to C8 ports are arranged in a 3x3 grid to save space required for the eight-way valve. Corresponding to the specific positions in the 3x3 grid, the C1 port is located in the second row, first column; the C2 port is located in the third row, first column; the C3 port is located in the second row, second column; the C4 port is located in the third row, second column; the C5 port is located in the third row, third column; the C6 port is located in the first row, second column; the C7 port is located in the first row, third column; and the C8 port is located in the second row, third column. The ports in the first row, first column can communicate with other ports, thereby expanding the connection options for the eight-way valve.

[0115] refer to Figure 7 In some embodiments, the specific connection methods of interfaces C1 to C8 are as follows: Figure 7 As shown.

[0116] In some embodiments, the flow plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in parallel to each other and one end of each is connected to a multi-way valve, and the other end of each is connected to a corresponding heat exchanger 1, motor control cooling device 2, low temperature radiator 3, condenser 4, water heating PTC, heater core 6 or power battery pack 7.

[0117] The present invention also provides a means of transportation employing any of the above-mentioned multi-port valve thermal management systems.

[0118] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A multi-port valve thermal management system, comprising a heat exchanger (1), a motor-controlled cooling device (2), a condenser (4), a water-cooled PTC (5), a heater core (6), and a power battery pack (7); characterized in that: The heat exchanger (1), the motor control cooling device (2), the condenser (4), the water heating PTC (5), the heater core (6), and the power battery pack (7) are all connected to a multi-way valve through a flow channel plate to form a circuit for the flow of coolant; The multi-way valve includes at least one movable valve core, which is used to switch the connection or closure between multiple pipelines; The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states: The motor control cooling device (2) is connected in series with the multi-way valve to form a motor control branch (10). The heat exchanger (1) is connected in series with the multi-way valve to form a heat exchanger branch (13). The power battery pack (7) is connected in series with the multi-way valve 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 the crew cabin heating branch (12). The motor control branch (10), the battery branch (11), and the heat exchanger branch (13) are interconnected through the multi-way valve to form a first circuit; The crew cabin heating branch (12) forms a separate second circuit, which is isolated from the first circuit; The multi-way valve includes interfaces C1, C2, C3, C4, C5, C6, C7, and C8. The C1 interface and the C2 interface are respectively connected to the outlet and inlet of the crew cabin heating branch (12); The C3 interface and the C4 interface are respectively connected to the inlet and outlet of the battery branch (11); The C5 interface and the C6 interface correspond to the inlet and outlet of the heat exchanger branch (13), respectively; The C7 interface and the C8 interface correspond to the inlet and outlet of the motor control branch (10), respectively; Specifically, the C8 interface and the C3 interface are interconnected, the C6 interface and the C7 interface are interconnected, and the C4 interface and the C5 interface are interconnected. The C1 and C2 interfaces are completely closed to the outlet and inlet of the crew cabin heating branch (12); A first proportional three-way valve (15) is provided between the crew cabin heating branch (12) and the multi-way valve to distribute the flow rate of coolant in the bypass pipe (16) in the crew cabin heating branch (12); The motor control branch (10) is equipped with a second proportional three-way valve (17). The motor control cooling device (2) and the second proportional three-way valve (17) are connected in parallel with a low-temperature radiator (3) and a short-circuit bypass. The flow rate of the corresponding coolant in the low-temperature radiator (3) and the short-circuit bypass is distributed through the second proportional three-way valve (17).

2. The multi-port valve thermal management system according to claim 1, characterized in that, The motor control branch (10), the battery branch (11), and the crew cabin heating branch (12) are all equipped with coolant circulating water pumps (8).

3. The multi-port valve thermal management system according to claim 1, characterized in that, A circuit for refrigerant to flow is provided between the heat exchanger (1) and the condenser (4); When the crew cabin heating branch (12) is in crew cabin heating or dehumidification mode, the heat comes from the condenser (4). If the heat is insufficient, the water heating PTC (5) will work to heat the coolant in the crew cabin heating branch (12) to meet the demand for warm air. The refrigerant carries heat and delivers it through the condenser (4) to the coolant in the crew cabin heating branch (12).

4. The multi-port valve thermal management system according to claim 3, characterized in that, The circuit through which the refrigerant flows is provided with an evaporator (9), the heating core (6) is assembled with the evaporator (9) and is provided with a blower; and / or, the circuit through which the refrigerant flows is provided with an outdoor heat exchanger (14). The blower, the heating core (6) and the evaporator (9) are installed inside the air conditioning unit; the blower is used to accelerate the air passing through the heating core (6) and the evaporator to achieve heat exchange.

5. The multi-port valve thermal management system according to claim 1, characterized in that, A condenser fan is provided at the low-temperature radiator (3); The condenser fan is used for auxiliary heat dissipation; and / or, A blower is provided at the heating core (6), and the blower and the heating core (6) are connected. The blower is used to accelerate the air passing through the heating core (6) to achieve heat exchange.

6. The multi-port valve thermal management system according to claim 1, characterized in that, The flow channel plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in parallel to each other and one end is connected to the multi-way valve. The other end is connected to the corresponding heat exchanger (1), the motor electronic control cooling device (2), the condenser (4), the water heating PTC (5), the heater core (6), or the power battery pack (7).

7. A means of transportation, characterized in that, The multi-port valve thermal management system described in any one of claims 1 to 6 is adopted.

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