A heat pump type thermal management system and a thermal management method for a hybrid vehicle

Abstract

The application discloses a heat pump type thermal management system and method for a hybrid vehicle, comprising a heating, ventilation and air conditioning assembly, a multi-way valve with at least nine interfaces, a cooling liquid circuit connected to the nine different interfaces, and a refrigerant circuit capable of heat exchange with the cooling liquid circuit; the cooling liquid circuit comprises an electric drive circuit, a heat dissipation circuit, a battery circuit, a coupling circuit, a first heat exchange cooling liquid circuit, a second heat exchange cooling liquid circuit, a warm air core circuit and an engine circuit; the cooling liquid outlet of the first heat exchange cooling liquid circuit is connected to the engine cooling liquid inlet; the engine cooling liquid outlet of the engine circuit is selectively connected to the cooling liquid outlet of the first heat exchange cooling liquid circuit and the cooling liquid inlet of the warm air core circuit; the refrigerant circuit comprises a first refrigerant series circuit with a compressor, a first heat exchanger and a second heat exchanger connected in series, and a second refrigerant circuit with the compressor, the first heat exchanger and an evaporator connected in series.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management systems of new energy vehicles, in particular to a heat pump type thermal management system and method for a hybrid vehicle. BACKGROUND

[0002] In the field of thermal management systems for extended-range vehicles, there are some problems in the prior art that need to be solved urgently.

[0003] For the thermal management system and control method for extended-range vehicles disclosed in CN202410387472, the cooling liquid circuit is provided with a six-way valve 16 and a three-way valve 17, which realizes multiple heat dissipation and heat utilization modes to some extent, but still has obvious defects. The system does not use a heat pump heating mode, and when there is no waste heat from the engine, the heating of the battery and the passenger compartment completely depends on the output of the electric heater 26, with no energy-saving effect; the battery pack heating uses a water-to-water heat exchanger (heat exchanger 21) to absorb the heat of the cooling liquid in the heating circuit, which limits the heat exchange and temperature rise; and there are many heat exchangers in the cooling liquid circuit, which makes the overall cost high. The heat pump type thermal management system and control method for a hybrid vehicle disclosed in CN202310957742 cancels the outdoor heat exchanger (OHX), which switches different cooling liquid circuit states through a multi-way valve, adjusts the refrigerant circuit, and uses the radiator 401 as a heat dissipation element and a heat absorption element, but still has many deficiencies. There are many elements in the refrigerant circuit, and the pipeline is complex; in summer cooling conditions, the water flow direction is first radiator 35→intercooler 25→other components 31→motor components 25→first water-cooled heat exchanger 19→radiator 35, the cooling liquid is heated in the intercooler 25, other components 31 and motor components 25, and the heat exchange in the first water-cooled heat exchanger 19 is limited, the heat dissipation of the compressor exhaust port through the first water-cooled heat exchanger 19 is limited in severe working conditions, which affects the cooling of the vehicle, and it is necessary to increase the heat exchanger 50 to improve the summer cooling capacity, and because the intercooler 25, other components 31, motor components 25 and first water-cooled heat exchanger 19 are connected in series, the heat exchange cannot be distributed according to the heat load demand of the two, resulting in high coupling and mutual restriction between the two; at the same time, the system cannot realize the recovery of engine waste heat to the battery pack heating.

[0004] In summary, the deficiencies of the prior art mainly lie in: in summer refrigeration working condition, the electric drive system and the water-cooled condenser are connected in series, and the heat exchange amount cannot be distributed according to the refrigeration requirements of the electric drive system and the passenger cabin / battery pack, resulting in high coupling and mutual restriction of the two; an additional heat exchange element is needed as a heat sink (water-water heat exchanger or chiller) when the battery pack is heated; the multi-way valve of the thermal management system for pure electric and hybrid vehicles is not standardized. These problems seriously affect the performance, cost and applicability of the thermal management system of the extended-range vehicle, and a new technical solution is urgently needed to solve the above technical problems and improve the overall efficiency of the thermal management system of the extended-range vehicle. SUMMARY

[0005] The purpose of the present application is to solve the above-mentioned deficiencies in the background art, and to provide a hybrid vehicle thermal management system and method of the heat pump type, which has a simple refrigerant circuit, can flexibly distribute the heat exchange amount according to the refrigeration requirements of the electric drive system and the passenger cabin / battery pack, and does not need to additionally increase a heat exchange element as a heat sink when the battery pack is heated.

[0006] To achieve this purpose, the hybrid vehicle thermal management system of the heat pump type designed by the present application comprises a heating, ventilation and air conditioning assembly, which comprises an evaporator and a heater core, and further comprises a multi-way valve having at least nine interfaces, a cooling liquid circuit connected to the nine different interfaces of the multi-way valve, and a refrigerant circuit capable of heat exchange with the cooling liquid circuit; the nine interfaces include interface one to interface nine; the cooling liquid circuit includes an electric drive circuit, a heat dissipation circuit, a battery circuit, a coupling circuit connecting the electric drive circuit and the heat dissipation circuit with the multi-way valve, a first heat exchange cooling liquid circuit connected with a first heat exchanger, a second heat exchange cooling liquid circuit connected with a second heat exchanger, a heater core circuit, and an engine circuit, the cooling liquid outlet of the first heat exchange cooling liquid circuit is in communication with the engine cooling liquid inlet of the engine circuit, and the engine cooling liquid outlet of the engine circuit is selectively in communication with the cooling liquid outlet of the first heat exchange cooling liquid circuit and the cooling liquid inlet of the heater core circuit; the refrigerant circuit includes a first refrigerant series circuit connecting a compressor, the first heat exchanger and the second heat exchanger in series, and a second refrigerant circuit connecting the compressor, the first heat exchanger and the evaporator in series; the multi-way valve can realize the circulation flow of multiple cooling liquids by controlling the mutual communication or cutoff between the interfaces, and the control and switching of multiple thermal management can be realized by the heat exchange between the cooling liquid circuit and the refrigerant circuit.

[0007] Further, one end of the electric drive circuit, one end of the heat dissipation circuit and one end of the coupling circuit, one end of the first heat exchange cooling liquid circuit, and one end of the warm air core circuit are connected to any five different interfaces of the interfaces one to nine respectively; both ends of the battery circuit and both ends of the second heat exchange cooling liquid circuit are connected to any two interfaces of the remaining four interfaces of the interfaces one to nine, and both ends of the battery circuit and both ends of the second heat exchange cooling liquid circuit are connected to four different interfaces.

[0008] Further, the electric drive circuit comprises a cooling liquid pipeline connected to the interface eight, and the electric drive assembly and the two-in-one module are connected to the cooling liquid pipeline connected to the interface eight, and the coupling circuit is connected to the other end of the cooling liquid pipeline connected to the interface eight.

[0009] Further, the heat dissipation circuit comprises a cooling liquid pipeline connected to the interface seven, and the first heat radiator and the heat dissipation fan are connected to the cooling liquid pipeline connected to the interface seven, and the coupling circuit is connected to the other end of the cooling liquid pipeline connected to the interface seven.

[0010] Further, the battery circuit comprises a cooling liquid pipeline connected to the interface five and the interface six respectively, and the battery pack is connected to the cooling liquid pipeline connected between the interface five and the interface six.

[0011] Further, the coupling circuit comprises a cooling liquid pipeline connected to the interface nine, and the other end of the cooling liquid pipeline connected to the interface nine is communicated with the electric drive circuit and the heat dissipation circuit.

[0012] Further, the first heat exchange cooling liquid circuit comprises a cooling liquid pipeline connected to the interface three and the engine cooling liquid inlet of the engine circuit respectively, and the first heat exchanger is connected to the cooling liquid pipeline between the interface three and the engine cooling liquid inlet of the engine circuit.

[0013] Further, the second heat exchange cooling liquid circuit comprises a cooling liquid pipeline connected to the interface one and the interface two respectively, and the second heat exchanger is connected to the cooling liquid pipeline between the interface one and the interface two.

[0014] Further, the warm air core circuit comprises a cooling liquid pipeline connected to the engine cooling liquid outlet of the engine circuit and the interface four respectively, and the warm air core is connected to the cooling liquid pipeline between the engine cooling liquid outlet and the interface four.

[0015] Further, the warm air core circuit further comprises a water heater connected to the cooling liquid pipeline between the engine cooling liquid outlet and the interface four.

[0016] Further, the engine circuit comprises an engine assembly, a second radiator and a radiator fan connected in series through a cooling liquid pipeline; the engine cooling liquid outlet is selectively communicated with the cooling liquid outlet of the first heat exchange cooling liquid circuit and the cooling liquid inlet of the heating core circuit through a cooling liquid three-way valve and a cooling liquid pipeline.

[0017] Further, the first refrigerant series circuit comprises a first refrigerant pipeline for connecting the compressor, the first heat exchanger and the second heat exchanger in series; the second refrigerant series circuit comprises a second refrigerant pipeline connected in parallel to the second heat exchanger, the evaporator is connected to the second refrigerant pipeline, one end of the second refrigerant pipeline is connected to the air inlet side of the compressor, and the other end of the second refrigerant pipeline is connected to the first refrigerant pipeline between the first heat exchanger and the second heat exchanger.

[0018] Further, the heat management method of the hybrid vehicle heat pump type heat management system comprises a cooling liquid circuit heat management method and a refrigerant circuit heat management method; the cooling liquid circuit heat management method comprises a single circuit cooling liquid heat management method for separately controlling one or more of the cooling liquid circuits and a combined circuit cooling liquid heat management method for connecting any two or more of the cooling liquid circuits to form at least one circulating cooling liquid circuit; the refrigerant circuit heat management method comprises a single circuit refrigerant heat management method for connecting the compressor with the first heat exchanger or the second heat exchanger, or connecting the compressor with the first heat exchanger and the evaporator, and a combined circuit refrigerant heat management method for connecting the compressor with the first heat exchanger, the second heat exchanger and the evaporator.

[0019] Further, the single circuit cooling liquid heat management method comprises a single battery circuit heat management method, a single first heat exchange cooling liquid circuit heat management method and a single engine circuit heat management method; the single battery circuit heat management method comprises: connecting the water inlet end and the water outlet end of the battery circuit through a multi-way valve to make the cooling liquid flow through the battery pack and control the temperature of the battery pack; the single first heat exchange cooling liquid circuit heat management method comprises: connecting the water inlet end and the water outlet end of the first heat exchange cooling liquid circuit through a multi-way valve to make the cooling liquid pass through the first heat exchanger, exchange heat with the refrigerant in the first heat exchanger, and absorb heat from the cooling liquid flowing through the first heat exchanger; the single engine circuit heat management method comprises: pumping the cooling liquid into the engine, and then into the engine again after passing through the second radiator.

[0020] Further, the combined loop cooling liquid heat pipe method includes a first combined loop thermal management method of combining and performing thermal management control on the electric drive loop, the heat dissipation loop, the coupling loop, the first heat exchange cooling liquid loop, and the heater core loop; a second combined loop thermal management method of combining and performing thermal management control on the electric drive loop, the heat dissipation loop, the coupling loop, the first heat exchange cooling liquid loop, the heater core loop, and the engine loop; a third combined loop thermal management method of combining and performing thermal management control on the second heat exchange cooling liquid loop and the battery loop; a fourth combined loop thermal management method of combining and performing thermal management control on the electric drive loop, the heat dissipation loop, and the second heat exchange cooling liquid loop; a fifth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop, the heater core loop, and the battery loop; a sixth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop, the heater core loop, the engine loop, and the battery loop; a seventh combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop and the heater core loop; an eighth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop, the heater core loop, and the engine loop; and a ninth combined loop thermal management method of combining and performing thermal management control on the electric drive loop, the coupling loop, and the second heat exchange cooling liquid loop.

[0021] Further, the first combined loop thermal management method includes: connecting the outlet of the electric drive loop to the inlet of the heat dissipation loop, connecting the inlet of the first heat exchange cooling liquid loop to the outlet of the coupling loop, connecting the outlet of the first heat exchange cooling liquid loop to the inlet of the heater core loop, and connecting the outlet of the heater core loop to the inlet of the heat dissipation loop through a multi-way valve. When the cooling liquid flows through the electric drive loop, the electric drive assembly can be cooled. When the cooling liquid flows through the heat dissipation loop, the cooling liquid can be dissipated or the radiator can be deiced at the same time. When the cooling liquid flows through the first heat exchanger in the first heat exchange cooling liquid loop, the cooling liquid flowing through the first heat exchanger can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid flowing through the first heat exchanger absorbs heat. When the cooling liquid flows through the heater core in the heater core loop, the air can be heated to achieve passenger compartment dehumidification or heating. When the cooling liquid flows through the coupling loop, the cooling liquid can enter the first heat exchange cooling liquid loop through the coupling loop.

[0022] Further, the second combined loop thermal management method includes: connecting the outlet water end of the electric drive loop and the inlet water end of the heat dissipation loop, connecting the inlet water end of the first heat exchange cooling liquid loop and the outlet water end of the coupling loop, connecting the outlet water end of the first heat exchange cooling liquid loop and the inlet water end of the warm air core loop, and connecting the outlet water end of the warm air core loop and the inlet water end of the heat dissipation loop through the multi-way valve. When the cooling liquid flows through the electric drive loop, the electric drive assembly can be cooled. When the cooling liquid flows through the heat dissipation loop, the heat dissipation of the cooling liquid or the deicing of the radiator can be realized. When the cooling liquid flows through the first heat exchanger in the first heat exchange cooling liquid loop, heat exchange with the refrigerant in the first heat exchanger can be performed, so that the cooling liquid flowing through the first heat exchanger absorbs heat. When the cooling liquid flows through the warm air core in the warm air core loop, air can be heated to realize passenger compartment dehumidification or heating. When the cooling liquid flows through the coupling loop, the cooling liquid can enter the first heat exchange cooling liquid loop through the coupling loop. When the cooling liquid flows through the engine loop, heat exchange with the engine assembly in the engine loop can be performed, so that the cooling liquid flowing through the engine assembly absorbs heat.

[0023] Further, the third combined loop thermal management method includes: connecting the inlet water end of the battery loop and the outlet water end of the second heat exchange cooling liquid loop, and connecting the outlet water end of the battery loop and the inlet water end of the second heat exchange cooling liquid loop through the multi-way valve. When the cooling liquid flows through the battery loop, the battery pack can be cooled or uniform temperature control of the battery pack can be realized. When the cooling liquid flows through the second heat exchange cooling liquid loop, heat exchange with the refrigerant in the second heat exchanger can be performed, so that the cooling liquid flowing through the second heat exchanger releases heat.

[0024] Further, the fourth combined loop thermal management method includes: connecting the outlet water end of the electric drive loop and the inlet water end of the second heat exchange cooling liquid loop, connecting the inlet water end of the heat dissipation loop and the outlet water end of the second heat exchange cooling liquid loop, and cutting off the interface connected with the coupling loop through the multi-way valve. When the cooling liquid flows through the electric drive loop, the electric drive assembly can be cooled. When the cooling liquid flows through the heat dissipation loop, the cooling liquid can absorb heat. When the cooling liquid flows through the second heat exchange cooling liquid loop, heat exchange with the refrigerant in the second heat exchanger can be performed, so that the cooling liquid flowing through the second heat exchanger releases heat.

[0025] Further, the fifth combined loop thermal management method includes the following two kinds:

[0026] Method one, the fifth combined loop thermal management method includes: through the multi-way valve, the water inlet end of the first heat exchange cooling liquid circuit is communicated with the water outlet end of the battery circuit, and the water inlet end of the battery circuit is communicated with the water outlet end of the warm air core circuit; the cooling liquid flowing through the battery circuit can heat the battery pack, the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, and dehumidification or heating of the passenger compartment is realized.

[0027] Method two, the fifth combined loop thermal management method includes: through the multi-way valve, the water inlet end of the first heat exchange cooling liquid circuit is communicated with the water outlet end of the battery circuit, and the water inlet end of the battery circuit is communicated with the water outlet end of the warm air core circuit, the water inlet end of the battery circuit is communicated with the water outlet end, and the water inlet end of the first heat exchange cooling liquid circuit is communicated with the water outlet end of the warm air core circuit; the cooling liquid flowing through the battery circuit can heat the battery pack, the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, and dehumidification or heating of the passenger compartment is realized.

[0028] Further, the sixth combined loop thermal management method includes the following two methods:

[0029] Method one: the sixth combined loop thermal management method includes: through the multi-way valve, the water inlet end of the first heat exchange cooling liquid circuit is communicated with the water outlet end of the battery circuit, and the water inlet end of the battery circuit is communicated with the water outlet end of the warm air core circuit, and the water outlet end of the engine circuit is selectively communicated with the water inlet end of the warm air core circuit; the cooling liquid flowing through the battery circuit can heat the battery pack, the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, and dehumidification or heating of the passenger compartment is realized, and the cooling liquid flowing through the engine assembly in the engine circuit exchanges heat, so that the cooling liquid flowing through the engine assembly absorbs heat.

[0030] Method two: the sixth combined loop thermal management method includes: connecting the water inlet end of the first heat exchange cooling liquid circuit with the water outlet end of the battery circuit, connecting the water inlet end of the battery circuit with the water outlet end of the warm air core circuit, connecting the water inlet end and the water outlet end of the battery circuit, and connecting the water inlet end of the first heat exchange cooling liquid circuit with the water outlet end of the warm air core circuit; the cooling liquid flowing through the battery circuit can heat the battery pack, the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, realizing dehumidification or heating of the passenger compartment, and the cooling liquid flowing through the engine assembly in the engine circuit exchanges heat with the engine assembly, so that the cooling liquid flowing through the engine assembly absorbs heat.

[0031] Further, the seventh combined loop thermal management method includes: connecting the water inlet end of the first heat exchange cooling liquid circuit with the water outlet end of the warm air core circuit through the multi-way valve; the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, and the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, realizing dehumidification or heating of the passenger compartment.

[0032] Further, the eighth combined loop thermal management method includes: connecting the water inlet end of the first heat exchange cooling liquid circuit with the water outlet end of the warm air core circuit through the multi-way valve, and selectively connecting the water outlet end of the engine circuit with the water inlet end of the warm air core circuit; the cooling liquid flowing through the first heat exchanger in the first heat exchange cooling liquid circuit can exchange heat with the refrigerant in the first heat exchanger, so that the cooling liquid passing through the first heat exchanger absorbs heat, the cooling liquid flowing through the warm air core in the warm air core circuit can heat the air, realizing dehumidification or heating of the passenger compartment, and the cooling liquid flowing through the engine assembly in the engine circuit exchanges heat with the engine assembly, so that the cooling liquid flowing through the engine assembly absorbs heat.

[0033] Further, the ninth combined loop thermal management method includes: connecting the water outlet end of the electric drive circuit with the water inlet end of the second heat exchange cooling liquid circuit through the multi-way valve, and connecting the water outlet end of the second heat exchange cooling liquid circuit with the water inlet end of the coupling circuit; the cooling liquid flowing through the electric drive circuit can cool the electric drive assembly, the cooling liquid flowing through the coupling circuit can be introduced into the electric drive circuit through the coupling circuit, and the cooling liquid flowing through the second heat exchange cooling liquid circuit can exchange heat with the refrigerant in the second heat exchanger, so that the cooling liquid flowing through the second heat exchanger absorbs heat.

[0034] Further, the single circuit refrigerant thermal management method includes opening a valve between the first heat exchanger and the evaporator, closing a valve between the first heat exchanger and the second heat exchanger, or closing a valve between the first heat exchanger and the evaporator, opening a valve between the first heat exchanger and the second heat exchanger, so that the compressor and the first heat exchanger are selectively communicated with the evaporator or the second heat exchanger; the combined circuit refrigerant thermal management method includes opening a valve between the first heat exchanger and the evaporator and a valve between the first heat exchanger and the second heat exchanger, so that the compressor and the first heat exchanger are simultaneously communicated with the evaporator and the second heat exchanger.

[0035] The present application has the advantages that: the hybrid vehicle heat pump type thermal management system and the thermal management method designed by the present application have significant advantages in system architecture, function implementation and energy saving and consumption reduction, effectively solve many problems in the prior art, and greatly improve the performance of the hybrid vehicle thermal management system. The thermal management system of the present application comprises a plurality of cooling liquid circuits and refrigerant circuits which work cooperatively, through a multi-way valve with at least nine interfaces, the communication or cutoff between each interface can be flexibly controlled, realizing the circulation of multiple cooling liquids, and the efficient heat exchange and thermal management control switching between the cooling liquid circuit and the refrigerant circuit. This multi-circuit design and precise control method, compared with the coupling problem caused by the series connection of the electric drive system and the water-cooled condenser and other components in the prior art, enables the thermal management of each component to be independently controlled. For example, the electric drive circuit, the heat dissipation circuit, the battery circuit and the like can be cooled, heated or uniform temperature controlled according to their own needs, avoiding the mutual restriction between the refrigeration or heating requirements of different components, greatly improving the system operation efficiency. The components of each cooling liquid circuit and refrigerant circuit are reasonably configured, and each component can work efficiently in its own circuit. The electric drive assembly and the two-in-one module in the electric drive circuit, the radiator and the radiator fan in the heat dissipation circuit, the battery pack in the battery circuit and the like can work cooperatively under different working conditions under the coordination of the multi-way valve. Through various combined circuit thermal management methods, the system can meet the diversified needs of the hybrid vehicle under different working conditions. The first combined circuit thermal management method can simultaneously realize the functions of electric drive assembly cooling, cooling liquid heat dissipation or radiator deicing, passenger compartment dehumidification or heating and the like; the second combined circuit thermal management method can achieve battery pack cooling or uniform temperature control and heat exchange with the second heat exchanger and the like. These combined methods greatly improve the adaptability of the system to different working conditions. In view of the problem that the battery pack heating in the prior art needs to additionally increase the heat exchange element and the heat exchange amount and temperature rise are limited, the present application solves the problem through a unique circuit design. By combining the battery circuit with other cooling liquid circuits, such as the fifth and sixth combined circuit thermal management methods, the heating of the battery pack can be realized without additional complex heat exchange elements. This design not only reduces the complexity and cost of the system, but also improves the battery pack thermal management effect. The single battery circuit thermal management method can control the uniform temperature of the battery pack, ensuring that the battery works in a stable temperature environment, which helps to prolong the battery life and improve the battery performance. The single circuit refrigerant thermal management method can selectively connect the compressor and the first heat exchanger with the second heat exchanger or the evaporator, and the combined circuit refrigerant thermal management method can simultaneously connect the compressor and the first heat exchanger with the second heat exchanger and the evaporator. This flexible control method can accurately adjust the flow direction of the refrigerant and the heat exchange components according to the actual heat load demand, improving the heat exchange efficiency of the refrigerant circuit and further optimizing the performance of the entire thermal management system. In winter heating, the present application innovatively uses air source heat pump and water source heat pump technology for motor waste heat recovery for battery pack and passenger compartment heating, which significantly reduces the winter heating energy consumption, improves the energy utilization efficiency and reduces the vehicle operating cost.In the summer refrigeration working condition, the electric drive system cooling liquid circuit and the water-cooled condenser cooling liquid circuit adopt parallel design, which reduces the coupling degree of the two, can accurately adjust the refrigerating capacity according to the actual demand, avoids energy waste, and improves the overall performance of the system. Compared with other heat pump systems in the industry, the control valve used in the cooling liquid and refrigerant circuit of the present application is less, which effectively simplifies the system structure. This not only reduces the manufacturing cost, but also reduces the system failure point, improves the system reliability, and thus improves the market competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of a heat pump type thermal management system of a hybrid vehicle with a water heater in the present application;

[0037] Figure 2 is a schematic diagram of a heat pump type thermal management system of a hybrid vehicle without a water heater in the present application;

[0038] Figure 3 is a refrigerant flow state one in the present application;

[0039] Figure 4 is a refrigerant flow state two in the present application;

[0040] Figure 5 is a refrigerant flow state three in the present application;

[0041] Figure 6 is an interface conduction schematic diagram of each mode of the multi-way valve in the present application;

[0042] Figure 7 is a cooling liquid flow schematic diagram when the multi-way valve is in mode one, the b port and the c port of the cooling liquid three-way valve are communicated, and the cooling liquid flows through the engine assembly in the present application;

[0043] Figure 8 is a cooling liquid flow schematic diagram when the multi-way valve is in mode three, the a port and the c port of the cooling liquid three-way valve are communicated in the present application;

[0044] Figure 9 is a cooling liquid flow schematic diagram when the multi-way valve is in mode seven, the b port and the c port of the cooling liquid three-way valve are communicated in the present application;

[0045] Wherein, 1 - compressor, 2 - first heat exchanger, 3 - second heat exchanger, 4 - first electronic expansion valve, 5 - second electronic expansion valve, 6 - first electronic water pump, 7 - second electronic water pump, 8 - third electronic water pump, 9 - cooling fan, 10 - first cooling liquid check valve, 11 - second cooling liquid check valve, 12 - heater core, 13 - evaporator, 14 - blower, 15 - first radiator, 16 - two-in-one module, 17 - electric drive assembly, 18 - battery pack, 19 - multi-way valve, 20 - heating, ventilation and air conditioning assembly, 21 - internal and external circulation damper, 22 - heating and cooling mixed air damper, 23 - air outlet mode damper, 24 - liquid storage dryer 24, 25 - low-pressure side refrigerant temperature and pressure sensor, 26 - high-pressure side refrigerant temperature and pressure sensor, 27 - engine assembly, 28 - second radiator, 29 - cooling liquid three-way valve, 30 - water heater, 31 - thermostat, 32 - engine, 100 - first refrigerant pipeline, 200 - cooling liquid pipeline, 300 - electric drive circuit, 400 - heat dissipation circuit, 500 - battery circuit, 600 - coupling circuit, 700 - first heat exchange cooling liquid circuit, 800 - second heat exchange cooling liquid circuit, 900 - heater core circuit, 1000 - engine circuit, 1100 - second refrigerant pipeline. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0047] As Figure 1 The heat pump type thermal management system of the hybrid vehicle designed by the present application is aimed at realizing efficient thermal management control and switching and meeting the thermal demand of the hybrid vehicle under different working conditions. In some embodiments, there is a water heater 30 (as shown in Figure 1 In other embodiments, there is no water heater 30 (as shown in Figure 2

[0048] System overall architecture

[0049] ​The heat management system designed by the application comprises a heating, ventilation and air conditioning assembly 20, wherein the heating, ventilation and air conditioning assembly 20 comprises an evaporator 13 and a heater core 12, air can be blown into the passenger cabin by a blower 14, refrigeration can be achieved when the air passes through the evaporator 13, heating can be achieved when the air passes through the heater core 12, and dehumidification can be achieved when the air passes through the evaporator 13 and the heater core 12 in sequence. In addition, a multi-way valve 19 with nine interfaces, namely interfaces one to nine, is arranged, a cooling liquid circuit connected to the nine different interfaces of the multi-way valve 19, and a refrigerant circuit capable of exchanging heat with the cooling liquid circuit. The multi-way valve 19 realizes the circulation of multiple cooling liquids by controlling the intercommunication or cut-off between the interfaces, and achieves the control and switching of multiple heat management by means of the heat exchange between the cooling liquid circuit and the refrigerant circuit.

[0050] Based on the above heating, ventilation and air conditioning assembly 20, the following specific embodiments of the cooling liquid circuit and the embodiments of the refrigerant circuit are provided.

[0051] Cooling liquid circuit embodiment:

[0052] The cooling liquid circuit comprises an electric drive circuit 300 capable of achieving the cooling of the electric drive assembly 17 and the heat absorption of the cooling liquid, a heat dissipation circuit 400 capable of achieving the heat emission or absorption of the cooling liquid to the outside, a battery circuit 500 capable of achieving the uniform temperature operation of the battery, a coupling circuit 600 capable of guiding the cooling liquid flowing through the heat dissipation circuit 400 into the multi-way valve 19 and simultaneously communicating with the water inlet end of the electric drive circuit 17, a first heat exchange cooling liquid circuit 700 connected with the first heat exchanger 2 and capable of exchanging heat with the refrigerant on the compressor exhaust side passing through the first heat exchanger 2, a second heat exchange cooling liquid circuit 800 connected with the second heat exchanger 3 and capable of exchanging heat with the refrigerant passing through the first heat exchanger 2 into the second heat exchanger 3, a heater core circuit 900 connected with the heater core 12 and the engine 32 simultaneously, and an engine circuit 1000, the cooling liquid outlet of the first heat exchange cooling liquid circuit 700 communicates with the engine cooling liquid inlet of the engine circuit 1000, and the engine cooling liquid outlet of the engine circuit 1000 can selectively communicate with the cooling liquid outlet of the first heat exchange cooling liquid circuit 700 and the cooling liquid inlet of the heater core circuit 900 through the cooling liquid three-way valve 29.

[0053] The electric drive circuit 300 comprises a cooling liquid pipeline 200 connected to the interface eight, the electric drive assembly 17 and the two-in-one module 16 are sequentially connected on the cooling liquid pipeline 200, and the other end of the cooling liquid pipeline 200 is connected to the coupling circuit 600, which is mainly responsible for the cooling and heat management of the electric drive system.

[0054] The heat dissipation circuit 400 comprises a cooling liquid pipeline 200 connected to the interface seven, the heat dissipation circuit 400 is provided with a radiator 15 and a heat dissipation fan 9, and the other end of the cooling liquid pipeline 200 is connected to the coupling circuit 600, which is used for the heat dissipation of the cooling liquid and the deicing of the radiator.

[0055] The battery circuit 500 includes the coolant pipe 200 connected with the interface five and the interface six at two ends, and the battery pack 18 is installed on the coolant pipe 200, so that the cooling, heating and temperature control of the battery pack 18 are realized.

[0056] The coupling circuit 600 includes the coolant pipe 200 connected with the interface nine at one end, and the other end of the coolant pipe 200 is communicated with the electric drive circuit 300 and the heat dissipation circuit 400, so as to connect and coordinate the electric drive circuit and the heat dissipation circuit.

[0057] The first heat exchange coolant circuit 700 includes the coolant pipe 200 connected with the interface three and the coolant inlet of the engine 32 at two ends. The first heat exchange coolant circuit 700 is connected with the first heat exchanger 2, and the heat exchange function with the refrigerant is realized.

[0058] The second heat exchange coolant circuit 800 includes the coolant pipe 200 connected with the interface one and the interface two at two ends, and the second heat exchanger 3 is connected on the coolant pipe 200. The second heat exchange coolant circuit 800 is mainly used for heat exchange with the refrigerant, and meets the heat transfer requirement under different working conditions.

[0059] The heater core circuit 900 includes the coolant pipe 200 connected with the interface four at one end and connected with the coolant three-way valve 29 at the other end, and the heater core 12 is connected on the coolant pipe 200, and the water heater 30 is also connected in some cases. The heater core circuit 900 can realize the heating and dehumidification of the passenger compartment.

[0060] The engine circuit 1000 includes the engine assembly 27, and the engine assembly 27 includes the engine 32 and the thermostat 31. The engine 32, the thermostat 31 and the second radiator 28 are connected in series through the coolant pipe 200, and the second radiator 28 is also connected with the heat dissipation fan 9. The coolant outlet of the engine 32 is connected with the coolant three-way valve 29, and the first heat exchange coolant circuit 700 and the heater core circuit 29 are selectively connected through the coolant three-way valve 29. The engine circuit 1000 can realize the heat dissipation of the engine assembly 27 and the like.

[0061] Refrigerant circuit embodiment:

[0062] The refrigerant circuit includes a first refrigerant circuit and a second refrigerant circuit.

[0063] The first refrigerant circuit includes the first refrigerant pipe 100, and the compressor 1, the first heat exchanger 2 and the second heat exchanger 3 are connected in series through the first refrigerant pipe 100, so as to realize the circulation flow and heat exchange of the refrigerant among the key components.

[0064] The second refrigerant circuit includes a second refrigerant pipeline 1100 connected in parallel to the second heat exchanger 3, the evaporator 13 is connected to the second refrigerant pipeline 1100, one end of the second refrigerant pipeline 1100 is connected to the suction side of the compressor 1, and the other end is connected to the first refrigerant pipeline 100 between the first heat exchanger 2 and the second heat exchanger 3.

[0065] When the first refrigerant circuit and the second refrigerant circuit are connected at the same time, the cooling, dehumidifying and battery cooling functions of the passenger compartment can be realized.

[0066] Through such a design, the heat pump type thermal management system of the hybrid vehicle can flexibly adjust the working state of the coolant circuit and the refrigerant circuit under different working conditions, realize efficient thermal management, and improve the performance and stability of the hybrid vehicle.

[0067] As shown in Figure 1 Based on the heat pump type thermal management system of the hybrid vehicle, the following working conditions can be realized:

[0068] Example one: summer double refrigeration working condition

[0069] The multi-way valve 19 is in mode 1, the connection state is interface one to interface six, interface two to interface five, interface three to interface nine, interface four to interface eight to interface seven, and the coolant three-way valve 29 is in state b to c.

[0070] The refrigerant at the exhaust side of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the coolant and the 24 liquid storage dryer 24, and then enters the second heat exchanger 3 and the evaporator 13 after being throttled by the first electronic expansion valve 4 and the second electronic expansion valve 5 respectively, and the air is heated by the evaporator through the air inlet of the air blower 14, completing the cooling of the passenger compartment. The flow direction of the refrigerant is as shown in Figure 3 The third electronic water pump 8 operates, the coolant flows through the battery pack 18, and the coolant exchanges heat with the refrigerant in the second heat exchanger 3, and the cooled coolant enters the battery pack 18 through the third electronic water pump 8 to complete the cooling.

[0071] The first electronic water pump 6 operates, and the first coolant check valve 10 is turned on. The exhaust gas of the compressor 1 exchanges heat with the coolant flowing through the first heat exchanger 2, and the cooled coolant flows through the b port to the c port of the coolant three-way valve 29, and then enters the water heater 30 (as shown in Figure 1 System) or directly enters the heater core 12 (as shown in Figure 2 System).

[0072] If the electric drive assembly 17 has cooling requirements, the second electronic water pump 7 is operated, the second cooling liquid one-way valve 11 is turned on, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, after taking away the heat of the two, flows through the interface eight to the interface seven of the multi-way valve 19, and then converges with the cooling liquid passing through the heater core 12 to enter the first radiator 15, and is heat-exchanged with the outside air through the radiator fan 9 or the windward of the vehicle, the cooling liquid is cooled by heat release, and then flows into the second cooling liquid one-way valve 11 and the interface nine respectively, the cooling liquid flowing through the interface nine enters the interface three to the first cooling liquid one-way valve 10, and the circulation is completed.

[0073] If the electric drive assembly 17 has no requirements, the second electronic water pump 7 is stopped, the second cooling liquid one-way valve 11 is cut off, the cooling liquid passing through the heater core 12 enters the first radiator 15, and is heat-exchanged with the outside air through the radiator fan 9 or the windward of the vehicle, the cooling liquid is cooled by heat release, and then flows into the interface nine of the multi-way valve 19, and then flows through the interface three to the first cooling liquid one-way valve 10, and the circulation is completed.

[0074] If the engine assembly 27 has cooling requirements, the large circulation is started, the cooling liquid enters the second radiator 28, is heat-exchanged with the outside air through the radiator fan 9 or the windward of the vehicle, and then flows into the engine assembly 27 after being cooled by heat release, and the circulation is completed.

[0075] If the engine assembly 27 has no requirements, the large circulation is stopped.

[0076] Embodiment two: summer single-occupant cabin refrigeration working condition.

[0077] The multi-way valve 19 is in mode 1, and the connection state is that the interface one is connected to the interface six, the interface two is connected to the interface five, the interface three is connected to the interface nine, the interface four and the interface eight are connected to the interface seven, and the cooling liquid three-way valve 29 is in state b connected to c.

[0078] The exhaust side refrigerant of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the cooling liquid and the 24 liquid storage dryer 24, enters the evaporator 13 after throttling through the second electronic expansion valve 5, and is heat-exchanged with the air through the air inlet of the air blower 14 to complete the refrigeration of the occupant cabin, at this time, the first electronic expansion valve 4 is cut off, and the refrigerant flows as follows: Figure 4 .

[0079] The first electronic water pump 6 is operated, and the first cooling liquid one-way valve 10 is turned on, the exhaust of the compressor 1 and the cooling liquid are heat-exchanged with the cooling liquid flowing through the first heat exchanger 2 in the first heat exchanger 2, the cooling liquid absorbs heat and then flows through the b port to the c port of the cooling liquid three-way valve 29, and then enters the water heater 30 (such as Figure 1 the system) or directly enters the heater core 12 (such as Figure 2 the system).

[0080] If the electric drive assembly 17 has cooling requirements, the second electronic water pump 7 is operated, the second cooling liquid one-way valve 11 is turned on, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, and after taking away the heat of the two, it is confluent with the cooling liquid passing through the heater core 12 into the first radiator 15, and through the heat dissipation fan 9 or the air of the vehicle facing the outside air heat exchange, the cooling liquid is cooled by heat release, and then flows into the interface nine of the second cooling liquid one-way valve 11 and the multi-way valve 19, through the interface three to the first cooling liquid one-way valve 10, and completes the circulation.

[0081] If the electric drive assembly 17 has no requirements, the second electronic water pump 7 is stopped, the second cooling liquid one-way valve 11 is cut off, the cooling liquid passing through the heater core 12 enters the first radiator 15, and through the heat dissipation fan 9 or the air of the vehicle facing the outside air heat exchange, the cooling liquid is cooled by heat release, and then flows into the interface nine of the second cooling liquid one-way valve 11 and the multi-way valve 19, through the interface three to the first cooling liquid one-way valve 10, and completes the circulation.

[0082] If the battery pack 18 has uniform temperature requirements at this time, the third electronic water pump 8 is operated.

[0083] If the battery pack 18 has no uniform temperature requirements at this time, the third electronic water pump 8 is stopped.

[0084] If the engine assembly 27 has cooling requirements, the large circulation is opened, the cooling liquid enters the second radiator 28, and through the heat dissipation fan 9 or the air of the vehicle facing the outside air heat exchange, the cooling liquid is cooled by heat release, and then flows into the engine assembly 27, and completes the circulation.

[0085] If the engine assembly 27 has no requirements, the large circulation is closed.

[0086] Example three: single battery pack cooling working condition during vehicle charging process.

[0087] The multi-way valve 19 is mode 1, and the connection state is that interface one is connected to interface six, interface two is connected to interface five, interface three is connected to interface nine, interface four+interface eight is connected to interface seven, and the cooling liquid three-way valve 29 is in state b connected to c.

[0088] The exhaust side refrigerant of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the cooling liquid and the liquid storage dryer 24, and after throttling through the first electronic expansion valve 4, it enters the second heat exchanger 3. At this time, the second electronic expansion valve 5 is cut off, and the refrigerant flows to Figure 5 .

[0089] The third electronic water pump 8 is operated, the cooling liquid flows through the battery pack 18, and exchanges heat with the refrigerant in the second heat exchanger 3. The cooling liquid is cooled by heat release, and then enters the battery pack 18 through the third electronic water pump 8 to complete refrigeration.

[0090] The first electronic water pump 6 operates, the first cooling liquid check valve 10 is turned on, the compressor 1 exhaust gas exchanges heat with the cooling liquid in the first heat exchanger 2, the cooling liquid absorbs heat and flows through the b port to the c port of the cooling liquid three-way valve 29, and then enters the water heater 30 (such as Figure 1 system) or directly enters the warm air core 12 (such as Figure 2 system).

[0091] The second electronic water pump 7 stops, the second cooling liquid check valve 11 is cut off, the cooling liquid flowing through the warm air core 12 enters the first radiator 15, exchanges heat with the outside air through the cooling fan 9 or the windward of the vehicle, the cooling liquid releases heat, and the circulation is completed.

[0092] Example Four: Dehumidification of the passenger compartment in spring and autumn.

[0093] The multi-way valve 19 is in mode 1, the connection state is interface one to interface six, interface two to interface five, interface three to interface nine, interface four to interface eight to interface seven, and the cooling liquid three-way valve 29 is in the state of b to c.

[0094] The compressor 1 exhaust gas side refrigerant sequentially flows through the first heat exchanger 2 to release heat to the cooling liquid and the liquid storage dryer 24, enters the second heat exchanger 3 and the evaporator 13 after throttling through the second electronic expansion valve 5, and exchanges heat with the evaporator through the air inlet of the air blower 14 to release heat. At this time, the first electronic expansion valve 4 is cut off, and the refrigerant flows as shown in Figure 4 .

[0095] The first electronic water pump 6 operates, the first cooling liquid check valve 10 is turned on, the compressor 1 exhaust gas exchanges heat with the cooling liquid in the first heat exchanger 2, the cooling liquid absorbs heat and flows through the b port to the c port of the cooling liquid three-way valve 29, and then enters the water heater 30 (such as Figure 1 system) or directly enters the warm air core 12 (such as Figure 2 system), and the air flows through the warm air core 12 through the cooling and heating air door 22 and exchanges heat with the cooling liquid therein to absorb heat, and the dehumidification of the passenger compartment is completed.

[0096] If the electric drive assembly 17 has cooling requirements, the second electronic water pump 7 operates, the second cooling liquid check valve 11 is turned on, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, takes away the heat of the two, and then flows into the first radiator 15 together with the cooling liquid flowing through the warm air core 12, exchanges heat with the outside air through the cooling fan 9 or the windward of the vehicle, and the cooling liquid releases heat and cools down, and then flows into the second cooling liquid check valve 11 and the interface nine of the multi-way valve 19, respectively, through the interface three to the first cooling liquid check valve 10, and the circulation is completed.

[0097] If the electric drive assembly 17 has no cooling requirement, the second electronic water pump 7 stops, the second coolant one-way valve 11 is closed, the coolant passing through the heater core 12 enters the first radiator 15, and is heat-exchanged with the outside air through the radiator fan 9 or the vehicle windward, and then flows into the interface nine of the multi-way valve 19, and then flows into the interface three to the first coolant one-way valve 10, to complete the circulation.

[0098] If the battery pack 18 has the uniform temperature requirement, the third electronic water pump 8 operates.

[0099] If the battery pack 18 has no uniform temperature requirement, the third electronic water pump 8 stops.

[0100] If the battery pack 18 has the cooling requirement, the first electronic expansion valve 4 throttles, the third electronic water pump 8 operates, the coolant flows through the battery pack 18, and is heat-exchanged with the refrigerant in the second heat exchanger 3, and then flows into the battery pack 18 through the third electronic water pump 8 to complete the refrigeration, and the refrigerant flows to as shown in Figure 3 .

[0101] If the engine assembly 27 has the cooling requirement, the large circulation is opened, the coolant enters the second radiator 28, is heat-exchanged with the outside air through the radiator fan 9 or the vehicle windward, is cooled by heat release, and then flows into the engine assembly 27 to complete the circulation.

[0102] If the engine assembly 27 has no requirement, the large circulation is closed.

[0103] Example five: special working condition: after the winter intense driving, the battery pack 18 has the cooling requirement in the charging process, and the passenger compartment has the heating requirement.

[0104] The multi-way valve 19 is in mode 1, the connection state is that the interface one is connected to the interface six, the interface two is connected to the interface five, the interface three is connected to the interface nine, the interface four and the interface eight are connected to the interface seven, and the coolant three-way valve 29 is in state b connected to c.

[0105] The exhaust side refrigerant of the compressor 1 flows through the first heat exchanger 2 to release heat to the coolant and the liquid storage dryer 24 in sequence, flows into the second heat exchanger 3 after throttling through the first electronic expansion valve 4, and flows to as shown in Figure 5 .

[0106] The first electronic water pump 6 operates, the first coolant one-way valve 10 is connected, the exhaust of the compressor 1 is heat-exchanged with the coolant in the first heat exchanger 2, the coolant flows through the b port to the c port of the coolant three-way valve 29 after being heated, enters the water heater 30 (such as Figure 1 the system) or directly enters the heater core 12 (such as Figure 2 the system), the air is heat-exchanged with the heater core 12 through the air inlet of the air blower 14 to absorb heat, the coolant releases heat, and the passenger compartment heating is completed.

[0107] When the second electronic water pump 7 starts, the second coolant check valve 11 is opened, and the coolant flows through the two-in-one module 16 and the electric drive assembly 17, carrying away the heat from both. After that, the coolant flows into the first radiator 15 after passing through the heater core 12. It then exchanges heat with the outside air through the cooling fan 9 or the vehicle's windward direction, releasing heat and completing the circulation.

[0108] When the third electronic water pump 8 is activated, the coolant flows through the battery pack 18 and exchanges heat with the refrigerant in the second heat exchanger 3. After the coolant releases heat and cools down, it enters the battery pack 18 through the third electronic water pump 8 to complete the cooling process.

[0109] If the engine assembly 27 requires cooling, the large circulation is activated, and the coolant enters the second radiator 28. It exchanges heat with the outside air through the cooling fan 9 or the vehicle's windward direction, releasing heat and cooling the coolant before flowing back into the engine assembly 27 to complete the circulation.

[0110] If engine assembly 27 has no requirement, then the large circulation is shut down.

[0111] Example 6: Special operating condition: Radiator de-icing.

[0112] Multi-way valve 19 is in mode 1, with the following connection states: port 1 through port 6, port 2 through port 5, port 3 through port 9, port 4 + port 8 through port 7. Compressor 1 is stopped, and the refrigerant circuit is stationary.

[0113] When there is no waste heat available from engine assembly 27, the coolant three-way valve 29 is in position b to c. Figure 1 In the system shown, the first electronic water pump 6 operates, the first coolant check valve 10 is open, and the coolant flows through the first heat exchanger 2, then through port b to port c of the coolant three-way valve 29, and then enters the water heater 30. At this time, the water heater 30 operates to heat the coolant flowing inside it. Then the coolant flows through the heater core 12, the second electronic water pump 7 stops, the second coolant check valve 11 closes, and the coolant flowing through the heater core 12 enters the first radiator 15. The coolant dissipates heat to the outer surface of the first radiator 15, completing the de-icing process. Figure 2 In the system shown, the second electronic water pump 7 operates, the second coolant check valve 11 is opened, and the coolant flowing through the electric drive assembly 17 is heated by the heat generated by the electric drive assembly 17. The first electronic water pump 6 stops, the first coolant check valve 10 is closed, and the coolant flowing through the electric drive assembly 17 enters the first radiator 15. The coolant dissipates heat to the outer surface of the first radiator 15, completing the de-icing process.

[0114] When the engine assembly 27 has waste heat available, the coolant three-way valve 29 is in the A-to-C state. The first electronic water pump 6 operates, the first coolant check valve 10 is open, and the coolant flows through the first heat exchanger 2 and into the engine assembly 27. After absorbing waste heat, the coolant enters the A-to-C ports of the coolant three-way valve 29 and then enters the water heater 30 (e.g., ...).Figure 1 system) or directly into the heater core 12 (such as Figure 2 system) into the first radiator 15, and then the cooling liquid flows through the heater core 12, the second electronic water pump 7 stops, the second cooling liquid check valve 11 is closed, the cooling liquid flowing through the heater core 12 enters the first radiator 15, and the cooling liquid is cooled to the outer surface of the first radiator 15, completing the deicing.

[0115] Example seven: dual heating working condition when the air source heat pump is available in winter and there is no engine waste heat, the outlet water temperature of the heater core 12 is within the acceptable range of the inlet water temperature of the battery pack 18.

[0116] The multi-way valve 19 is in mode 2, the connection state is interface one to interface eight, interface two to interface seven, interface three to interface six, interface four to interface five, and interface nine is closed. The cooling liquid three-way valve 29 is in state b to c.

[0117] The second electronic water pump 7 operates, and the second cooling liquid check valve 11 is open. The cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (which can heat the cooling liquid by generating heat, such as Figure 2 system) and then enters the second heat exchanger 3.

[0118] The refrigerant on the discharge side of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the cooling liquid and the liquid storage dryer 24. After throttling through the first electronic expansion valve 4, the refrigerant enters the second heat exchanger 3 and exchanges heat with the cooling liquid. The refrigerant absorbs heat from the cooling liquid, and the cooling liquid releases heat. The refrigerant after flowing through the second heat exchanger 3 enters the suction port of the compressor to complete the cycle. At this time, the second electronic expansion valve 5 is closed, and the refrigerant flows as shown in Figure 5 .

[0119] The cooling liquid after flowing through the second heat exchanger 3 enters the first radiator 15 and exchanges heat with the outside air through the radiator fan 9 or the vehicle windward, the cooling liquid absorbs heat from the outside air, and the outside air releases heat, completing the cycle.

[0120] The first electronic water pump 6 operates, and the first cooling liquid check valve 10 is open. The cooling liquid flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the discharge port of the compressor 1, absorbs heat, and releases heat. Then the cooling liquid flows through the b port to the c port of the cooling liquid three-way valve 29 and then flows through the water heater 30 (which can heat the cooling liquid by generating heat, such as Figure 1 system) or directly into the heater core 12 (such as Figure 2 system), and the air enters through the air inlet of the blower fan 14 to exchange heat with the heater core 12 and absorb heat, and the cooling liquid releases heat, completing the passenger compartment heating.

[0121] The third electronic water pump 8 operates, and the coolant from the heater core 12 enters the battery pack 18 inlet after passing through the third electronic water pump 8, flows through the battery pack 18 to complete battery heating, and returns to the first coolant check valve 10 to complete the circulation.

[0122] Embodiment eight: single battery heating working condition when the air source heat pump is available in winter and there is no engine waste heat, the heater core 12 does not exchange heat and only serves as a flow resistance.

[0123] The multi-way valve 19 is in mode 2, and the connection state is that interface one connects to interface eight, interface two connects to interface seven, interface three connects to interface six, interface four connects to interface five, and interface nine is cut off. The coolant three-way valve 29 is in state b connecting to c.

[0124] The second electronic water pump 7 operates, and the second coolant check valve 11 is open. The coolant flows through the two-in-one module 16 and the electric drive assembly 17 (which can heat the coolant by generating heat, such as a system), and then enters the second heat exchanger 3. Figure 2

[0125] The exhaust side refrigerant of the compressor 1 flows through the first heat exchanger 2 in turn to release heat to the coolant and the liquid storage dryer 24. After throttling through the first electronic expansion valve 4, the refrigerant enters the second heat exchanger 3 to exchange heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. The refrigerant flowing through the second heat exchanger 3 enters the suction port of the compressor to complete the circulation. At this time, the second electronic expansion valve 5 is cut off, and the refrigerant flows as shown in the figure. Figure 5

[0126] The coolant flowing through the second heat exchanger 3 enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle windward air to complete the circulation.

[0127] The first electronic water pump 6 operates, and the first coolant check valve 10 is open. The coolant flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the exhaust port of the compressor 1. The coolant absorbs heat, and the refrigerant releases heat. Then, the coolant flows through the b port to the c port of the coolant three-way valve 29, and then flows through the water heater 30 (which can heat the coolant by generating heat, such as a system) or directly enters the heater core 12 (such as a system). The blower 14 stops, and the heater core 12 does not exchange heat. Figure 1 Figure 2

[0128] The third electronic water pump 8 operates, and the coolant from the heater core 12 enters the battery pack 18 inlet after passing through the third electronic water pump 8, flows through the battery pack 18 to complete battery heating, and returns to the first coolant check valve 10 to complete the circulation.

[0129] ​​​​Example nine: dual heating mode when the air source heat pump is available in winter and there is no engine waste heat, the water temperature of the warm air core is higher than the acceptable threshold of the water temperature of the battery pack, and the outlet water of the battery pack needs to be mixed into the inlet water.

[0130] The multi-way valve 19 is in mode 3, the connection state is interface one to interface eight, interface two to interface seven, interface three, interface four, interface five, interface six mixed water, interface nine stop, and the cooling liquid three-way valve 29 is in state b to c.

[0131] The second electronic water pump 7 operates, the second cooling liquid one-way valve 11 is conducted, and the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (the cooling liquid can be heated by a heat generation auxiliary, such as a system) and then enters the second heat exchanger 3. Figure 2

[0132] The compressor 1 exhaust side refrigerant flows through the first heat exchanger 2 in turn to release heat to the cooling liquid and the liquid storage dryer 24, passes through the first electronic expansion valve 4 to be throttled, and then enters the second heat exchanger 3 to exchange heat with the cooling liquid. The refrigerant absorbs heat from the cooling liquid, and the cooling liquid releases heat. The refrigerant flowing through the second heat exchanger 3 enters the compressor suction port to complete the cycle. At this time, the second electronic expansion valve 5 is closed, and the refrigerant flows as shown in the figure. Figure 5

[0133] The cooling liquid flowing through the second heat exchanger 3 enters the first radiator 15 and exchanges heat with the outside air through the radiator fan 9 or the air of the vehicle, the cooling liquid absorbs heat from the outside air, and the outside air releases heat to complete the cycle.

[0134] The first electronic water pump 6 operates, the first cooling liquid one-way valve 10 is conducted, the cooling liquid flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the compressor 1 exhaust port, the cooling liquid absorbs heat, and the refrigerant releases heat and then flows through the b port to the c port of the cooling liquid three-way valve 29, and then flows through the water heater 30 (the cooling liquid can be heated by a heat generation auxiliary, such as a system) or directly enters the warm air core 12 (such as a system), and the air exchanges heat with the warm air core 12 through the air inlet of the air blower 14 to absorb heat, the cooling liquid releases heat, and the passenger compartment heating is completed. Figure 1 Figure 2

[0135] ​​​​At this time, the interfaces four and six of the multi-way valve 19 are in communication with the interfaces three and five, and the cooling liquid after flowing through the heater core 12 is split to the interfaces three and five after entering the interface four of the multi-way valve 19. The third electronic water pump 8 is operated, and the cooling liquid after flowing through the battery pack 18 is split to the interfaces three and five after entering the interface six of the multi-way valve 19. Part of the outlet cooling liquid of the battery pack 18 and part of the cooling liquid flowing through the heater core 12 are mixed at the interface five and then return to the water inlet of the battery pack 18, completing the heating of the battery pack 18 and controlling the water inlet temperature of the battery pack 18 within the required temperature range. At the same time, part of the outlet cooling liquid of the battery pack 18 is mixed with the cooling liquid flowing through the heater core 12 at the interface six of the multi-way valve 19 and then returns to the first cooling liquid check valve 10, completing the water circulation.

[0136] Example ten: single-occupant cabin heating working condition when the air source heat pump is available in winter and there is no engine waste heat.

[0137] The multi-way valve 19 is in mode 4, and the communication state is that the interface one is connected to the interface eight, the interface two is connected to the interface seven, the interface three is connected to the interface four, the interface five is connected to the interface six, and the interface nine is cut off. The cooling liquid three-way valve 29 is in state b connected to c.

[0138] The second electronic water pump 7 is operated, and the second cooling liquid check valve 11 is open. The cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (the cooling liquid can be heated by a heat generation auxiliary system, such as Figure 2 , and then enters the second heat exchanger 3.

[0139] The refrigerant on the discharge side of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the cooling liquid and the liquid storage dryer 24. After being throttled by the first electronic expansion valve 4, the refrigerant enters the second heat exchanger 3 to exchange heat with the cooling liquid flowing therethrough. The refrigerant absorbs heat from the cooling liquid, and the cooling liquid releases heat. The refrigerant after flowing through the second heat exchanger 3 enters the suction port of the compressor to complete the cycle. At this time, the second electronic expansion valve 5 is cut off, and the flow direction of the refrigerant is as shown in Figure 5 .

[0140] The cooling liquid after flowing through the second heat exchanger 3 enters the first radiator 15 and exchanges heat with the outside air through the radiator fan 9 or the vehicle windward air, so that the cooling liquid absorbs heat from the outside air and the outside air releases heat, completing the cycle.

[0141] The first electronic water pump 6 is operated, and the first cooling liquid check valve 10 is open. The cooling liquid flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the discharge port of the compressor 1, absorbs heat, and releases heat. Then, the cooling liquid flows through the b port to the c port of the cooling liquid three-way valve 29, flows through the water heater 30 (the cooling liquid can be heated by a heat generation auxiliary system, such as Figure 1 ), or directly enters the heater core 12 (such as Figure 2 ), and the air exchanges heat with the heater core 12 through the air inlet of the air blower 14 to absorb heat, and the cooling liquid releases heat, completing the heating of the occupant cabin.

[0142] If the battery pack 18 requires temperature equalization at this time, the third electronic water pump 8 will operate.

[0143] If the battery pack 18 does not require temperature equalization at this time, the third electronic water pump 8 will stop.

[0144] Example 11: Dual heating mode when air source heat pump is unavailable in cold regions, water source heat pump is available, and there is no engine waste heat, the outlet water temperature of the heater core is within the acceptable range of the battery pack inlet water temperature.

[0145] Multi-way valve 19 is in mode 5, with the following connection states: interface 1 through interface 8, interface 2 through interface 9, interface 3 through interface 6, interface 4 through interface 5, and interface 7 shut off. The coolant three-way valve 29 is in state b through c.

[0146] The second electronic water pump 7 operates, the second coolant check valve 11 is opened, and the coolant flows through the two-in-one module 16 and the electric drive assembly 17 (the coolant can be heated by heat generation, such as...). Figure 2 The system carries away heat and enters the second heat exchanger 3, where it exchanges heat and then returns to the second coolant check valve 11 to complete the cycle.

[0147] The refrigerant on the discharge side of compressor 1 flows sequentially through the first heat exchanger 2, releasing heat to the coolant and the receiver-dryer 24. After being throttled by the first electronic expansion valve 4, it enters the second heat exchanger 3, where it exchanges heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. After flowing through the second heat exchanger 3, the refrigerant enters the suction port of compressor 1 to complete the cycle. At this time, the second electronic expansion valve 5 is closed, and the refrigerant flows as follows: Figure 5 .

[0148] The first electronic water pump 6 operates, and the first coolant check valve 10 is opened. The coolant flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the exhaust port of the compressor 1. The coolant absorbs heat, and the refrigerant releases heat. Then, the coolant flows through port b to port c of the coolant three-way valve 29 and then flows through the water heater 30 (which can work to assist in heating the coolant, such as...). Figure 1 (System) or directly into the warm air core 12 (such as) Figure 2 The system uses a blower 14 to draw in air, which then exchanges heat with the heating core 12, absorbing heat and releasing heat with the coolant, thus completing the heating of the crew cabin.

[0149] When the third electronic water pump 8 is running, the coolant from the heater core 12 enters the inlet of the battery pack 18 after passing through the third electronic water pump 8. After flowing through the battery pack 18 to complete the heating of the battery pack, it returns to the first coolant check valve 10 to complete the circulation.

[0150] Example 12: Single-battery pack heating operation when air source heat pump is unavailable in cold regions, water source heat pump is available, and there is no engine waste heat. The heater core does not exchange heat and only serves as flow resistance.

[0151] Multi-way valve 19 is in mode 5, and the communication state is interface one to interface eight, interface two to interface nine, interface three to interface six, interface four to interface five, and interface seven is closed. The cooling liquid three-way valve 29 is in state b to c.

[0152] The second electronic water pump 7 is running, and the second cooling liquid check valve 11 is open. The cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (which can heat the cooling liquid through heat generation, such as Figure 1 the system), takes away heat, enters the second heat exchanger 3, exchanges heat in the second heat exchanger 3, and returns to the second cooling liquid check valve 11 to complete the cycle.

[0153] The compressor 1 exhaust side refrigerant flows through the first heat exchanger 2 in turn to release heat to the cooling liquid and the liquid storage dryer 24, passes through the first electronic expansion valve 4 to throttle, enters the second heat exchanger 3, exchanges heat with the cooling liquid, the refrigerant absorbs heat from the cooling liquid, the cooling liquid releases heat, and the refrigerant after flowing through the second heat exchanger 3 enters the compressor suction port to complete the cycle. At this time, the second electronic expansion valve 5 is closed.

[0154] The first electronic water pump 6 is running, and the first cooling liquid check valve 10 is open. The cooling liquid flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the compressor 1 exhaust port, the cooling liquid absorbs heat, and the refrigerant releases heat. Then the cooling liquid flows through the b port to the c port of the cooling liquid three-way valve 29, flows through the water heater 30 (which can heat the cooling liquid through heat generation, such as Figure 1 the system) or directly enters the heater core 12 (such as Figure 2 the system), the air blower 14 stops, and the heater core 12 has no heat exchange.

[0155] The third electronic water pump 8 is running, the cooling liquid from the heater core 12 enters the battery pack 18 inlet after passing through the third electronic water pump 8, flows through the battery pack 18 to complete battery pack heating, and returns to the first cooling liquid check valve 10 to complete the cycle.

[0156] Example 13: When the air source heat pump is not available, the water source heat pump is available, and there is no engine waste heat, the dual heating working condition, the water outlet temperature of the heater core 12 is higher than the acceptable threshold of the water inlet temperature of the battery pack 18, and part of the water outlet of the battery pack 18 needs to be mixed into the water inlet thereof.

[0157] The multi-way valve 19 is in mode 6, and the communication state is interface one to interface eight, interface two to interface nine, interface three, interface four, interface five, and interface six is mixed water, and interface seven is closed. The cooling liquid three-way valve 29 is in state b to c.

[0158] The second electronic water pump 7 is running, and the second cooling liquid check valve 11 is open. The cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (which can heat the cooling liquid through heat generation, such as Figure 1The system), and enters the second heat exchanger 3 after taking away heat, and returns to the second cooling liquid one-way valve 11 after heat exchange, completing the circulation.

[0159] The refrigerant on the discharge side of the compressor 1 flows through the first heat exchanger 2 in sequence to release heat to the cooling liquid and the liquid storage dryer 24, enters the second heat exchanger 3 after throttling by the first electronic expansion valve 4, and exchanges heat with the cooling liquid, the refrigerant absorbs heat from the cooling liquid, the cooling liquid releases heat, and the refrigerant after flowing through the second heat exchanger 3 enters the suction port of the compressor 1 to complete the circulation, at this time the second electronic expansion valve 5 is closed (as shown in Figure 5 ).

[0160] The first electronic water pump 6 operates, and the first cooling liquid one-way valve 10 is open, the cooling liquid flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the discharge port of the compressor 1, the cooling liquid absorbs heat, and the refrigerant releases heat, and then the cooling liquid flows through the b port to the c port of the cooling liquid three-way valve 29, and then flows through the water heater 30 (which can work to assist heating the cooling liquid, such as Figure 1 the system) or directly enters the heater core 12 (such as Figure 2 the system), and the air exchanges heat with the heater core 12 by the air intake of the air blower 14 to absorb heat, the cooling liquid releases heat, and the passenger cabin heating is completed.

[0161] At this time, the interface four and the interface six of the multi-way valve 19 are in communication with the interface three and the interface five, the cooling liquid after flowing through the heater core 12 enters the interface four of the multi-way valve 19 and is divided into the interface three and the interface five, the third electronic water pump 8 operates, the cooling liquid after flowing through the battery pack 18 enters the interface six of the multi-way valve 19 and is divided into the interface three and the interface five, and part of the outlet cooling liquid of the battery pack 18 mixes with part of the cooling liquid flowing through the heater core 12 at the interface five and returns to the water inlet of the battery pack 18, completing the heating of the battery pack 18 and controlling the water inlet temperature of the battery pack 18 within the required temperature, and at the same time, part of the outlet water of the battery pack 18 mixes with the cooling liquid flowing through the heater core 12 at the interface six of the multi-way valve 19 and returns to the first cooling liquid one-way valve 10, completing the water circuit.

[0162] Embodiment fourteen: single passenger cabin heating working condition when the air source heat pump is unavailable, the water source heat pump is available, and there is no engine waste heat in cold regions.

[0163] The multi-way valve 19 is in mode 7, and the communication state is that the interface one communicates with the interface eight, the interface two communicates with the interface nine, the interface three communicates with the interface four, the interface five communicates with the interface six, and the interface seven is closed, and the cooling liquid three-way valve 29 is in state b communicates with c.

[0164] The second electronic water pump 7 operates, and the second cooling liquid one-way valve 11 is open, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17 (which can heat the cooling liquid by heat generation, such as Figure 2 the system), and enters the second heat exchanger 3 after taking away heat, and returns to the second cooling liquid one-way valve 11 after heat exchange, completing the circulation.

[0165] The compressor 1 exhaust side refrigerant flows through the first heat exchanger 2 in turn, gives heat to the coolant and the liquid storage dryer 24, and after throttling through the first electronic expansion valve 4, enters the second heat exchanger 3, exchanges heat with the coolant flowing through it, the refrigerant absorbs heat from the coolant, the coolant releases heat, and the refrigerant flowing through the second heat exchanger 3 enters the suction port of the compressor to complete the cycle. At this time, the second electronic expansion valve 5 is closed (as shown in Figure 5 ).

[0166] The first electronic water pump 6 is running, the first coolant one-way valve 10 is conducting, and the coolant flowing through the first heat exchanger 2 exchanges heat with the refrigerant from the exhaust port of the compressor 1, the coolant absorbs heat, and the refrigerant releases heat. Then the coolant flows through the b port to the c port of the coolant three-way valve 29, and then flows through the water heater 30 (which can work to assist heating the coolant, such as Figure 1 the system) or directly enters the warm air core 12 (such as Figure 2 the system), and through the air inlet of the air blower 14, the air exchanges heat with the warm air core 12 and absorbs heat, the coolant releases heat, and the passenger cabin heating is completed.

[0167] At this time, if the battery pack 18 has uniform temperature requirements, the third electronic water pump 8 is running.

[0168] At this time, if the battery pack 18 has no uniform temperature requirements, the third electronic water pump 8 is stopped.

[0169] Example Fifteen: Dual heating working condition when engine waste heat is available, the warm air core outlet water temperature is within the acceptable range of the battery pack inlet water temperature.

[0170] The multi-way valve 19 is in mode 2, and the connection state is that interface one connects to interface eight, interface two connects to interface seven, interface three connects to interface six, interface four connects to interface five, and interface nine is closed. The coolant three-way valve 29 is in the state of a connecting to c.

[0171] The compressor 1 is stopped, and the refrigerant circuit is static.

[0172] The first electronic water pump 6 is running, the first coolant one-way valve 10 is conducting, and the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing waste heat, enters the a port to the c port of the coolant three-way valve 29, enters the water heater 30 (such as Figure 1 the system) or directly enters the warm air core 12 (such as Figure 2 the system), and through the air inlet of the air blower 14, the air exchanges heat with the warm air core 12 and absorbs heat, the coolant releases heat, and the passenger cabin heating is completed.

[0173] The third electronic water pump 8 is running, the coolant from the warm air core 12 enters the battery pack 18 inlet after passing through the third electronic water pump 8, flows through the battery pack 18 to complete the battery pack heating, and returns to the first coolant one-way valve 10 to complete the cycle.

[0174] If the electric drive assembly 17 has cooling needs, the second electric water pump 7 is started, the second cooling liquid one-way valve 11 is open, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, after taking away the heat of the two, it flows through the second heat exchanger 3 and enters the first radiator 15, and through the heat dissipation fan 9 or the air heat exchange with the outside air of the vehicle, the cooling liquid is cooled by heat dissipation, and then returns to the second cooling liquid one-way valve 11 to complete the circulation.

[0175] If the electric drive assembly 17 has no cooling needs, the second electric water pump 7 is stopped.

[0176] Embodiment sixteen: single battery pack heating working condition when engine waste heat is available, the heating core does not exchange heat, and only serves as flow resistance.

[0177] The multi-way valve 19 is in mode 2, the connection state is that interface one is connected to interface eight, interface two is connected to interface seven, interface three is connected to interface six, interface four is connected to interface five, and interface nine is cut off. The cooling liquid three-way valve 29 is in state a connected to c.

[0178] The compressor 1 is stopped, and the refrigerant circuit is static.

[0179] The first electric water pump 6 is started, and the first cooling liquid one-way valve 10 is open. The cooling liquid flows through the first heat exchanger 2, enters the engine assembly 27, and then enters the a port to the c port of the cooling liquid three-way valve 29 after absorbing the waste heat, and then enters the water heater 30 (such as Figure 1 system) or directly enters the heating core 12 (such as Figure 2 system). The air blower 14 is stopped, and the heating core 12 does not exchange heat.

[0180] The third electric water pump 8 is started, and the cooling liquid from the heating core 12 enters the water inlet of the battery pack 18 after passing through the third electric water pump 8, flows through the battery pack 18 to complete the heating of the battery pack, and then returns to the first cooling liquid one-way valve 10 to complete the circulation.

[0181] If the electric drive assembly 17 has cooling needs, the second electric water pump 7 is started, the second cooling liquid one-way valve 11 is open, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, after taking away the heat of the two, it flows through the second heat exchanger 3 and enters the first radiator 15, and through the heat dissipation fan 9 or the air heat exchange with the outside air of the vehicle, the cooling liquid is cooled by heat dissipation, and then returns to the second cooling liquid one-way valve 11 to complete the circulation.

[0182] If the electric drive assembly 17 has no cooling needs, the second electric water pump 7 is stopped.

[0183] Embodiment seventeen: double heating working condition when engine waste heat is available, the water outlet temperature of the heating core is higher than the acceptable threshold of the water inlet temperature of the battery pack, and the water outlet of the battery pack needs to be mixed into the water inlet thereof.

[0184] The multi-way valve 19 is in mode 3, and the connection state is that interface one is connected to interface eight, interface two is connected to interface seven, interface three, interface four, interface five, and interface six are mixed water, and interface nine is cut off. The cooling liquid three-way valve 29 is in state a connected to c.

[0185] The compressor 1 is stopped, and the refrigerant circuit is static.

[0186] The first electronic water pump 6 is operated, the first cooling liquid one-way valve 10 is conducted, the cooling liquid flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, enters the a port to the c port of the cooling liquid three-way valve 29, and enters the water heater 30 (such as Figure 1 the system) or directly enters the heater core 12 (such as Figure 2 the system), and through the air inlet of the air blower 14, air and the heater core 12 exchange heat to absorb heat, the cooling liquid releases heat, and the heating of the passenger compartment is completed.

[0187] At this time, the interface four and the interface six of the multi-way valve 19 are connected to the interface three and the interface five, and the cooling liquid after flowing through the heater core 12 enters the interface four of the multi-way valve 19 and is divided into the interface three and the interface five. The third electronic water pump 8 is operated, the cooling liquid after flowing through the battery pack 18 enters the interface six of the multi-way valve 19 and is divided into the interface three and the interface five. Part of the outlet cooling liquid of the battery pack 18 mixes with part of the cooling liquid flowing through the heater core 12 at the interface five and then returns to the water inlet of the battery pack 18, completes the heating of the battery pack 18, and controls the water inlet temperature of the battery pack 18 within the required temperature. At the same time, part of the outlet water of the battery pack 18 mixes with the cooling liquid flowing through the heater core 12 at the interface six of the multi-way valve 19 and then returns to the first cooling liquid one-way valve 10, completing the water circulation.

[0188] If the electric drive assembly 17 has cooling requirements, the second electronic water pump 7 is operated, the second cooling liquid one-way valve 11 is conducted, the cooling liquid flows through the two-in-one module 16 and the electric drive assembly 17, carries away the heat of the two, then flows through the second heat exchanger 3, and then enters the first radiator 15. Through the radiator fan 9 or the air exchange with the outside air, the cooling liquid releases heat and cools down, and then returns to the second cooling liquid one-way valve 11, completing the circulation.

[0189] If the electric drive assembly 17 has no cooling requirements, the second electronic water pump 7 is stopped.

[0190] Embodiment eighteen: single passenger compartment heating working condition when engine waste heat is available.

[0191] The multi-way valve 19 is in mode 4, and the connection state is that interface one is connected to interface eight, interface two is connected to interface seven, interface three is connected to interface four, interface five is connected to interface six, and interface nine is cut off. The cooling liquid three-way valve 29 is in state a connected to c.

[0192] The first electronic water pump 6 operates, the first coolant check valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing waste heat, enters the a port to the c port of the coolant three-way valve 29, enters the water heater 30 (such as Figure 1 system) or directly enters the warm air core 12 (such as Figure 2 system), air and the warm air core 12 are heat exchanged by the air inlet of the air blower 14 to absorb heat, the coolant releases heat, and cabin heating is completed.

[0193] If the electric drive assembly 17 has cooling requirements, the second electronic water pump 7 operates, the second coolant check valve 11 is turned on, the coolant flows through the two-in-one module 16 and the electric drive assembly 17, carries away the heat of the two, then flows through the second heat exchanger 3, and then enters the first radiator 15, is heat exchanged with external air through the radiator fan 9 or the vehicle, releases heat, and cools down, and then returns to the second coolant check valve 11 to complete the circulation.

[0194] If the electric drive assembly 17 has no cooling requirements, the second electronic water pump 7 stops.

[0195] If the battery pack 18 has uniform temperature requirements at this time, the third electronic water pump 8 operates.

[0196] If the battery pack 18 has no uniform temperature requirements at this time, the third electronic water pump 8 stops.

[0197] In summary, the hybrid vehicle heat pump type thermal management system and the thermal management method designed by the application have obvious advantages in system architecture, function implementation and energy saving and consumption reduction, effectively solve many problems in the prior art, and greatly improve the performance of the hybrid vehicle thermal management system.

Claims

1. A heat pump type thermal management system of a hybrid vehicle, comprising a heating, ventilation and air conditioning assembly (20) including an evaporator (13) and a heater core (12), characterized in that: it further comprises a multi-way valve (19) having at least nine interfaces, a coolant circuit connected to nine different interfaces of the multi-way valve (19), and a refrigerant circuit capable of exchanging heat with the coolant circuit; the nine interfaces include interfaces one to nine; the coolant circuit includes an electric drive circuit (300), a heat dissipation circuit (400), a battery circuit (500), a coupling circuit (600) connecting the electric drive circuit (300) and the heat dissipation circuit (400) to the multi-way valve (19), a first heat exchange coolant circuit (700) connected to a first heat exchanger (2), a second heat exchange coolant circuit (800) connected to a second heat exchanger (3), a heater core circuit (900), and an engine circuit (1000), wherein a coolant outlet of the first heat exchange coolant circuit (700) is in communication with an engine coolant inlet of the engine circuit (1000), and an engine coolant outlet of the engine circuit (1000) is selectively in communication with the coolant outlet of the first heat exchange coolant circuit (700) and a coolant inlet of the heater core circuit (900); the refrigerant circuit includes a first refrigerant series circuit connecting a compressor (1), the first heat exchanger (2) and the second heat exchanger (3) in series, and a second refrigerant circuit connecting the compressor (1), the first heat exchanger (2) and the evaporator (13) in series; the multi-way valve (19) is capable of realizing circulation of multiple coolants by controlling mutual communication or blocking between interfaces, and capable of realizing control and switching of multiple thermal managements by heat exchange between the coolant circuit and the refrigerant circuit; the electric drive circuit (300) includes a coolant pipe (200) connected to interface eight at one end, an electric drive assembly (17) and a two-in-one module (16) connected to the coolant pipe (200) connected to the interface eight, and the coupling circuit (600) connected to the other end of the coolant pipe (200) connected to the interface eight; the heat dissipation circuit (400) includes a coolant pipe (200) connected to interface seven at one end, a first heat sink (15) and a heat dissipation fan (9) connected to the coolant pipe (200) connected to the interface seven, and the coupling circuit (600) connected to the other end of the coolant pipe (200) connected to the interface seven; the battery circuit (500) includes coolant pipes (200) connected to interface five and interface six at both ends, and a battery pack (18) connected to the coolant pipe (200) connected between the interface five and the interface six; and the coupling circuit (600) includes a coolant pipe (200) connected to interface nine at one end, and the other end of the coolant pipe (200) connected to the interface nine is in communication with the electric drive circuit (300) and the heat dissipation circuit (400). ​ ​ ​ ​ ​ ​ ​ ​ ​ The first heat exchange cooling liquid circuit (700) comprises a cooling liquid pipe (200) connected between the third interface and the engine cooling liquid inlet of the engine circuit (1000); the second heat exchange cooling liquid circuit (800) comprises a cooling liquid pipe (200) connected between the first interface and the second interface; the heating core circuit (900) comprises a cooling liquid pipe (200) connected between the engine cooling liquid outlet of the engine circuit (1000) and the fourth interface; the engine circuit (1000) comprises the engine assembly (27), the second radiator (28) and the radiator fan (9) connected in series through the cooling liquid pipe (200); the engine cooling liquid outlet is selectively communicated with the cooling liquid outlet of the first heat exchange cooling liquid circuit (700) and the cooling liquid inlet of the heating core circuit (900) through the cooling liquid three-way valve (29) and the cooling liquid pipe (200). The heating core circuit (900) further comprises a water heater (30) connected to the cooling liquid pipe (200) between the engine cooling liquid outlet and the fourth interface. The first refrigerant series circuit comprises a first refrigerant pipe (100) for connecting the compressor (1), the first heat exchanger (2) and the second heat exchanger (3) in series; the second refrigerant series circuit comprises a second refrigerant pipe (1100) connected in parallel to the second heat exchanger (3), the evaporator (13) is connected to the second refrigerant pipe (1100), one end of the second refrigerant pipe (1100) is connected to the gas inlet side of the compressor (1), and the other end of the second refrigerant pipe (1100) is connected to the first refrigerant pipe (100) between the first heat exchanger (2) and the second heat exchanger (3). The cooling liquid circuit thermal management method comprises a single circuit cooling liquid thermal management method for separately controlling one or more of the cooling liquid circuits and a combined circuit cooling liquid thermal management method for connecting any at least two of the cooling liquid circuits to form at least one circulating cooling liquid circuit.

2. The heat pump type thermal management system of a hybrid vehicle according to claim 1, characterized by: The cooling liquid circuit thermal management method comprises a single circuit cooling liquid thermal management method for separately controlling one or more of the cooling liquid circuits and a combined circuit cooling liquid thermal management method for connecting any at least two of the cooling liquid circuits to form at least one circulating cooling liquid circuit.

3. The heat pump type thermal management system of a hybrid vehicle according to claim 1, characterized by: ​ 4. A thermal management method for a thermal management system of a hybrid vehicle according to any one of claims 1 to 3, characterized by: ​ ​ The refrigerant circuit thermal management method includes a single circuit refrigerant thermal management method in which the compressor (1) is communicated with the first heat exchanger (2) or the second heat exchanger (3), or a combined circuit refrigerant thermal management method in which the compressor (1) is communicated with the first heat exchanger (2), the second heat exchanger (3) and the evaporator (13).

5. The thermal management method of the thermal management system of the hybrid vehicle according to claim 4, characterized by: The single circuit coolant thermal management method includes a single battery circuit thermal management method, a single first heat exchange coolant circuit thermal management method and a single engine circuit thermal management method; The single battery circuit thermal management method includes: connecting the water inlet end and the water outlet end of the battery circuit (500) through a multi-way valve (19) to make the coolant flow through the battery pack (18) to control the temperature of the battery pack (18); The single first heat exchange coolant circuit thermal management method includes: connecting the water inlet end and the water outlet end of the first heat exchange coolant circuit (700) through a multi-way valve (19) to make the coolant pass through the first heat exchanger (2), exchange heat with the refrigerant in the first heat exchanger (2), and absorb heat from the coolant flowing through the first heat exchanger (2); The single engine circuit thermal management method includes: pumping the coolant into the engine (32), passing through the second radiator (28) and then being introduced into the engine (32) again.

6. The thermal management method of the thermal management system of the hybrid vehicle according to claim 4, characterized by: The combined loop cooling liquid heat pipe method includes a first combined loop thermal management method of combining and performing thermal management control on the electric drive loop (300), the heat dissipation loop (400), the coupling loop (600), the first heat exchange cooling liquid loop (700), and the warm air core loop (900); a second combined loop thermal management method of combining and performing thermal management control on the electric drive loop (300), the heat dissipation loop (400), the coupling loop (600), the first heat exchange cooling liquid loop (700), the warm air core loop (900), and the engine loop (1000); a third combined loop thermal management method of combining and performing thermal management control on the second heat exchange cooling liquid loop (800) and the battery loop (500); a fourth combined loop thermal management method of combining and performing thermal management control on the electric drive loop (300), the heat dissipation loop (400), and the second heat exchange cooling liquid loop (800); a fifth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop (700), the warm air core loop (900), and the battery loop (500); a sixth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop (700), the warm air core loop (900), the engine loop (1000), and the battery loop (500); a seventh combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop (700) and the warm air core loop (900); an eighth combined loop thermal management method of combining and performing thermal management control on the first heat exchange cooling liquid loop (700), the warm air core loop (900), and the engine loop (1000); and a ninth combined loop thermal management method of combining and performing thermal management control on the electric drive loop (300), the coupling loop (600), and the second heat exchange cooling liquid loop (800).

7. The thermal management method of the thermal management system of the hybrid vehicle according to claim 6, characterized by: The first combined loop thermal management method comprises: connecting the outlet of the electric drive loop (300) with the inlet of the heat dissipation loop (400) through the multi-way valve (19), connecting the inlet of the first heat exchange cooling liquid loop (700) with the outlet of the coupling loop (600), connecting the outlet of the first heat exchange cooling liquid loop (700) with the inlet of the warm air core loop (900), and connecting the outlet of the warm air core loop (900) with the inlet of the heat dissipation loop (400). The cooling liquid flowing through the electric drive loop (300) can cool the electric drive assembly (17), the cooling liquid flowing through the heat dissipation loop (400) can realize heat dissipation of the cooling liquid or simultaneous ice removal of the radiator (15), the cooling liquid flowing through the first heat exchanger (2) in the first heat exchange cooling liquid loop (700) can exchange heat with the refrigerant in the first heat exchanger (2), so that the cooling liquid flowing through the first heat exchanger (2) absorbs heat, the cooling liquid flowing through the warm air core (12) in the warm air core loop (900) can heat air, realizing dehumidification or heating of the passenger compartment, and the cooling liquid flowing through the coupling loop can enter the first heat exchange cooling liquid loop (700) through the coupling loop (600). The second combined loop thermal management method comprises: connecting the outlet of the electric drive loop (300) with the inlet of the heat dissipation loop (400) through the multi-way valve (19), connecting the inlet of the first heat exchange cooling liquid loop (700) with the outlet of the coupling loop (600), connecting the outlet of the first heat exchange cooling liquid loop (700) with the inlet of the warm air core loop (900), and connecting the outlet of the warm air core loop (900) with the inlet of the heat dissipation loop (400). The cooling liquid flowing through the electric drive loop (300) can cool the electric drive assembly (17), the cooling liquid flowing through the heat dissipation loop (400) can realize heat dissipation of the cooling liquid or simultaneous ice removal of the radiator (15), the cooling liquid flowing through the first heat exchanger (2) in the first heat exchange cooling liquid loop (700) can exchange heat with the refrigerant in the first heat exchanger (2), so that the cooling liquid flowing through the first heat exchanger (2) absorbs heat, the cooling liquid flowing through the warm air core (12) in the warm air core loop (900) can heat air, realizing dehumidification or heating of the passenger compartment, the cooling liquid flowing through the coupling loop can enter the first heat exchange cooling liquid loop (700) through the coupling loop (600), and the cooling liquid flowing through the engine loop (1000) can exchange heat with the engine assembly (27) in the engine loop (1000), so that the cooling liquid flowing through the engine assembly (27) absorbs heat. The third combined loop thermal management method includes: connecting the water inlet end of the battery loop (500) with the water outlet end of the second heat exchange coolant loop (800) and connecting the water outlet end of the battery loop (500) with the water inlet end of the second heat exchange coolant loop (800) through the multi-way valve (19); the coolant flowing through the battery loop (500) can cool or realize uniform temperature control of the battery pack (18), and the coolant flowing through the second heat exchange coolant loop (800) can exchange heat with the refrigerant in the second heat exchanger (3) to make the coolant flowing through the second heat exchanger (3) release heat; The fourth combined loop thermal management method includes: connecting the water outlet end of the electric drive loop (300) with the water inlet end of the second heat exchange coolant loop (800) and connecting the water inlet end of the heat dissipation loop (400) with the water outlet end of the second heat exchange coolant loop (800) through the multi-way valve (19), and cutting off the interface connected with the coupling loop (600); the coolant flowing through the electric drive loop (300) can cool the electric drive assembly (17), the coolant flowing through the heat dissipation loop (400) can realize heat absorption of the coolant, and the coolant flowing through the second heat exchange coolant loop (800) can exchange heat with the refrigerant in the second heat exchanger (3) to make the coolant flowing through the second heat exchanger (3) release heat; The fifth combined loop thermal management method includes: connecting the water inlet end of the first heat exchange coolant loop (700) with the water outlet end of the battery loop (500) and connecting the water inlet end of the battery loop (500) with the water outlet end of the warm air core loop (900) through the multi-way valve (19); the coolant flowing through the battery loop (500) can heat the battery pack (18), the coolant flowing through the first heat exchanger (2) in the first heat exchange coolant loop (700) can exchange heat with the refrigerant in the first heat exchanger (2) to make the coolant flowing through the first heat exchanger (2) absorb heat, and the coolant flowing through the warm air core (12) in the warm air core loop (900) can heat air to realize dehumidification or heating of the passenger compartment; The fifth combined loop thermal management method further includes: connecting the water inlet end with the water outlet end of the battery loop (500), and connecting the water inlet end of the first heat exchange coolant loop (700) with the water outlet end of the warm air core loop (900). The sixth combined loop thermal management method comprises: connecting the water inlet end of the first heat exchange cooling liquid circuit (700) with the water outlet end of the battery circuit (500) through the multi-way valve (19), connecting the water inlet end of the battery circuit (500) with the water outlet end of the warm air core circuit (900), and selectively connecting the water outlet end of the engine circuit (1000) with the water inlet end of the warm air core circuit (900); the cooling liquid flowing through the battery circuit (500) can heat the battery pack (18), the cooling liquid flowing through the first heat exchanger (2) in the first heat exchange cooling liquid circuit (700) can exchange heat with the refrigerant in the first heat exchanger (2), so that the cooling liquid flowing through the first heat exchanger (2) absorbs heat, the cooling liquid flowing through the warm air core (12) in the warm air core circuit (900) can heat air, realizing dehumidification or heating of the passenger compartment, and the cooling liquid flowing through the engine assembly (27) in the engine circuit (1000) exchanges heat, so that the cooling liquid flowing through the engine assembly (27) absorbs heat; The sixth combined loop thermal management method further comprises: connecting the water inlet end of the battery circuit (500) with the water outlet end, and connecting the water inlet end of the first heat exchange cooling liquid circuit (700) with the water outlet end of the warm air core circuit (900); The seventh combined loop thermal management method comprises: connecting the water inlet end of the first heat exchange cooling liquid circuit (700) with the water outlet end of the warm air core circuit (900) through the multi-way valve (19); the cooling liquid flowing through the first heat exchanger (2) in the first heat exchange cooling liquid circuit (700) can exchange heat with the refrigerant in the first heat exchanger (2), so that the cooling liquid flowing through the first heat exchanger (2) absorbs heat, and the cooling liquid flowing through the warm air core (12) in the warm air core circuit (900) can heat air, realizing dehumidification or heating of the passenger compartment; The eighth combined loop thermal management method comprises: connecting the water inlet end of the first heat exchange cooling liquid circuit (700) with the water outlet end of the warm air core circuit (900) through the multi-way valve (19), and selectively connecting the water outlet end of the engine circuit (1000) with the water inlet end of the warm air core circuit (900); the cooling liquid flowing through the first heat exchanger (2) in the first heat exchange cooling liquid circuit (700) can exchange heat with the refrigerant in the first heat exchanger (2), so that the cooling liquid flowing through the first heat exchanger (2) absorbs heat, the cooling liquid flowing through the warm air core (12) in the warm air core circuit (900) can heat air, realizing dehumidification or heating of the passenger compartment, and the cooling liquid flowing through the engine assembly (27) in the engine circuit (1000) exchanges heat, so that the cooling liquid flowing through the engine assembly (27) absorbs heat; The ninth combined circuit thermal management method includes: connecting the outlet of the electric drive circuit (300) with the inlet of the second heat exchange coolant circuit (800) and connecting the outlet of the second heat exchange coolant circuit (800) with the inlet of the coupling circuit (600) through the multi-way valve (19); the coolant flowing through the electric drive circuit (300) can cool the electric drive assembly (17), the coolant flowing through the coupling circuit (600) can be guided into the electric drive circuit (300) through the coupling circuit (600), and the coolant flowing through the second heat exchange coolant circuit (800) can exchange heat with the refrigerant in the second heat exchanger (3) to make the coolant flowing through the second heat exchanger (3) release heat.

8. The thermal management method of the hybrid vehicle-based heat pump type thermal management system according to claim 4, characterized by: The single-circuit refrigerant thermal management method includes: opening the valve between the first heat exchanger (2) and the evaporator (13), closing the valve between the first heat exchanger (2) and the second heat exchanger (3), or closing the valve between the first heat exchanger (2) and the evaporator (13) and opening the valve between the first heat exchanger (2) and the second heat exchanger (3), so that the compressor (1) and the first heat exchanger (2) are selectively communicated with the evaporator (13) or the second heat exchanger (3); The combined circuit refrigerant thermal management method includes: opening the valve between the first heat exchanger (2) and the evaporator (13) and the valve between the first heat exchanger (2) and the second heat exchanger (3), so that the compressor (1) and the first heat exchanger (2) are simultaneously communicated with the evaporator (13) and the second heat exchanger (3).

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