Heat pump type heat management system and heat management method of hybrid electric vehicle

Abstract

The invention discloses a heat pump type heat management system and method for a hybrid electric vehicle. The heat pump type heat management system comprises a heat supply ventilation and air conditioning assembly, a multi-way valve with at least nine connectors, a cooling liquid loop connected to the nine different connectors and a refrigerant loop capable of conducting heat exchange with the cooling liquid loop. The cooling liquid loop comprises an electric drive loop, a heat dissipation loop, a battery loop, a coupling loop, a first heat exchange cooling liquid loop, a second heat exchange cooling liquid loop, a warm air core loop and an engine loop, and a cooling liquid outlet of the first heat exchange cooling liquid loop communicates with an engine cooling liquid inlet; an engine cooling liquid outlet of the engine loop selectively communicates with a cooling liquid outlet of the first heat exchange cooling liquid loop and a cooling liquid inlet of the warm air core loop; the refrigerant circuit comprises a first refrigerant series circuit connecting the 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.

Description

Technical Field

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

[0002] In the field of extended-range vehicle thermal management systems, there are some problems in existing technologies that need to be solved urgently.

[0003] For the extended-range vehicle thermal management system and control method disclosed in CN202410387472, its coolant circuit is provided with a six-way valve 16 and a three-way valve 17. Although a variety of heat dissipation and heat utilization modes are achieved to a certain extent, there are still obvious defects. The system does not adopt a heat pump heating method. When there is no waste heat from the engine, the heating of the battery and the passenger compartment depends entirely on the output of the electric heater 26, which has no energy-saving effect; the battery pack heating uses a water-to-water heat exchanger (heat exchanger 21) to absorb the heat of the heating circuit coolant, resulting in both heat exchange and temperature rise being limited; and there are many heat exchangers in the coolant circuit, which makes the overall cost higher. The hybrid vehicle heat pump type thermal management system and control method disclosed in CN202310957742 that cancels the outdoor heat exchanger (OHX) switches different coolant circuit states through the multi-way valve conduction mode, and the refrigerant circuit is also adjusted, and the radiator 401 can be reused as a heat release element and a heat absorption element, but there are also many shortcomings. The refrigerant circuit has many components and complex pipelines. Under the summer cooling condition, the water flow direction is the first radiator 35 → intercooler 25 → other components 31 → motor component 25 → first water-cooled heat exchanger 19 → radiator 35. After the coolant is heated in the intercooler 25, other components 31 and motor component 25, the heat exchange capacity in the first water-cooled heat exchanger 19 is limited. Under intense working conditions, the heat release of the refrigerant at the compressor exhaust port through the first water-cooled heat exchanger 19 is limited, which affects the vehicle cooling. The heat exchanger 50 has to be added to increase the cooling capacity in summer. Moreover, since the intercooler 25, other components 31, motor component 25 are connected in series with the first water-cooled heat exchanger 19, the heat exchange capacity cannot be allocated according to the heat load requirements of the two, resulting in a high degree of 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 for heating.

[0004] In summary, the shortcomings of the existing technology are mainly reflected in the following aspects: in the summer cooling condition, the electric drive system is connected in series with the water-cooled condenser, and the heat exchange cannot be allocated according to the cooling requirements of the electric drive system and the passenger compartment / battery pack, resulting in a high degree of coupling and mutual restriction between the two; when heating the battery pack, an additional heat exchange element is required as a heat absorption source (water-to-water heat exchanger or Chiller); the multi-way valves of the thermal management system for pure electric and hybrid vehicles are not on the same platform. These problems have seriously affected 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 of the invention

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned background technology and to provide a heat pump type thermal management system and a thermal management method for a hybrid vehicle having a simple refrigerant circuit, an electric drive system, and the ability to flexibly allocate heat exchange capacity according to the cooling requirements of the electric drive system and the passenger compartment / battery pack, and no need to add additional heat exchange elements as heat absorption sources when heating the battery pack.

[0006] To achieve this purpose, the heat pump type thermal management system of a hybrid vehicle designed by the present invention includes a heating, ventilation and air conditioning assembly, which includes an evaporator and a heater core, and also includes a multi-way valve with at least nine interfaces, a coolant circuit connected to the nine different interfaces of the multi-way valve, and a refrigerant circuit that can exchange heat with the coolant circuit; the nine interfaces include interfaces one to nine; the coolant 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 to the multi-way valve, a first heat exchange coolant circuit connected to the first heat exchanger, a second heat exchange coolant circuit connected to the second heat exchanger, a heater core circuit and an engine circuit, and the first heat exchange The coolant outlet of the hot coolant circuit is connected to the engine coolant inlet of the engine circuit, and the engine coolant outlet of the engine circuit can be selectively connected to the coolant outlet of the first heat exchange coolant circuit and the coolant inlet of the warm air core circuit; the refrigerant circuit includes a first refrigerant series circuit that connects the compressor, the first heat exchanger and the second heat exchanger in series, and a second refrigerant circuit that connects the compressor, the first heat exchanger and the evaporator in series; the multi-way valve can realize the circulation flow of multiple coolants by controlling the mutual connection or cutoff between each interface, and realize the control and switching of multiple thermal management through the heat exchange between the coolant circuit and the refrigerant circuit.

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

[0008] Furthermore, the electric drive circuit includes a coolant pipeline with one end connected to interface eight, the coolant pipeline connected to interface eight is connected to the electric drive assembly and the two-in-one module, and the other end of the coolant pipeline connected to interface eight is connected to the coupling circuit.

[0009] Furthermore, the heat dissipation circuit includes a coolant pipeline with one end connected to interface seven, a first radiator and a cooling fan are connected to the coolant pipeline connected to the interface seven, and the other end of the coolant pipeline connected to the interface seven is connected to the coupling circuit.

[0010] Furthermore, the battery circuit includes a coolant pipeline with two ends respectively connected to interface five and interface six, and a battery pack is connected to the coolant pipeline between the interface five and the interface six.

[0011] Furthermore, the coupling circuit includes a coolant pipeline with one end connected to the interface nine, and the other end of the coolant pipeline connected to the interface nine is connected to the electric drive circuit and the heat dissipation circuit.

[0012] Furthermore, the first heat exchange coolant circuit includes a coolant pipeline whose two ends are respectively connected to interface three and the engine coolant inlet of the engine circuit, and the first heat exchanger is connected to the coolant pipeline between interface three and the engine coolant inlet of the engine circuit.

[0013] Furthermore, the second heat exchange coolant circuit includes a coolant pipeline with two ends respectively connected to the interface 1 and the interface 2, and the second heat exchanger is connected to the coolant pipeline between the interface 1 and the interface 2.

[0014] Furthermore, the heater core circuit includes an engine coolant outlet of the engine circuit and a coolant pipeline on the interface four, both ends of which are respectively connected to the engine coolant outlet of the engine circuit, and the heater core is connected to the coolant pipeline between the engine coolant outlet and the interface four.

[0015] Furthermore, the heater core circuit also includes a water heater connected to the coolant pipeline between the engine coolant outlet and the interface four.

[0016] Furthermore, the engine circuit includes an engine assembly, a second radiator and a cooling fan connected in series through a coolant pipeline; the engine coolant outlet can be selectively connected to the coolant outlet of the first heat exchange coolant circuit and the coolant inlet of the heater core circuit through a coolant three-way valve and a coolant pipeline.

[0017] Furthermore, the first refrigerant series circuit includes a first refrigerant pipeline for connecting the compressor, the first heat exchanger and the second heat exchanger in series; the second refrigerant series circuit includes 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 intake side of the compressor, and the other end of the second refrigerant pipeline is connected to the first refrigerant pipeline located between the first heat exchanger and the second heat exchanger.

[0018] Furthermore, a thermal management method based on the heat pump type thermal management system of the hybrid vehicle described above includes a coolant circuit thermal management method and a refrigerant circuit thermal pipeline method; the coolant circuit thermal management method includes a single-circuit coolant thermal management method for individually controlling one or more of the coolant circuits and a combined-circuit coolant thermal pipeline method for connecting any at least two circuits of the coolant circuit to form at least one circulating coolant circuit; the refrigerant circuit thermal management method includes a single-circuit refrigerant thermal 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 thermal management method for connecting the compressor with the first heat exchanger, the second heat exchanger and the evaporator.

[0019] Furthermore, the single-loop coolant thermal management method includes a single battery loop thermal management method, a single first heat exchange coolant loop thermal management method and a single engine loop thermal management method; the single battery loop thermal management method includes: connecting the water inlet and outlet ends of the battery loop through a multi-way valve, allowing the coolant to flow through the battery pack, and performing uniform temperature control on the battery pack; the single first heat exchange coolant loop thermal management method includes: connecting the water inlet and outlet ends of the first heat exchange coolant loop through a multi-way valve, allowing the coolant to pass through the first heat exchanger and perform heat exchange with the refrigerant in the first heat exchanger, so that the coolant flowing through the first heat exchanger absorbs heat; the single engine loop thermal management method includes: pumping the coolant into the engine, and then introducing it into the engine again after passing through the second radiator.

[0020] Furthermore, the combined circuit coolant thermal pipeline method includes a first combined circuit thermal management method that combines the electric drive circuit, the heat dissipation circuit, the coupling circuit, the first heat exchange coolant circuit and the warm air core circuit and performs thermal management control; a second combined circuit thermal management method that combines the electric drive circuit, the heat dissipation circuit, the coupling circuit, the first heat exchange coolant circuit, the warm air core circuit and the engine circuit and performs thermal management control; a third combined circuit thermal management method that combines the second heat exchange coolant circuit and the battery circuit and performs thermal management control; a fourth combined circuit thermal management method that combines the electric drive circuit, the heat dissipation circuit and the second heat exchange coolant circuit and performs thermal management control; A fifth combined circuit thermal management method for combining a heat exchange coolant circuit, the heater core circuit and the battery circuit and performing thermal management control; a sixth combined circuit thermal management method for combining the first heat exchange coolant circuit, the heater core circuit, the engine circuit and the battery circuit and performing thermal management control; a seventh combined circuit thermal management method for combining the first heat exchange coolant circuit and the heater core circuit and performing thermal management control; an eighth combined circuit thermal management method for combining the first heat exchange coolant circuit, the heater core circuit and the engine circuit and performing thermal management control; a ninth combined circuit thermal management method for combining the electric drive circuit, the coupling circuit and the second heat exchange coolant circuit and performing thermal management control.

[0021] Furthermore, the first combined circuit thermal management method includes: connecting the water outlet of the electric drive circuit with the water inlet of the heat dissipation circuit, connecting the water inlet of the first heat exchange coolant circuit with the water outlet of the coupling pipeline, connecting the water outlet of the first heat exchange coolant circuit with the water inlet of the warm air core circuit, and connecting the water outlet of the warm air core circuit with the water inlet of the heat dissipation circuit through a multi-way valve; when the coolant flows through the electric drive circuit, the electric drive assembly can be cooled; when the coolant flows through the heat dissipation circuit, the coolant can dissipate heat or de-ice the radiator at the same time; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat; when the coolant flows through the warm air core in the warm air core circuit, it can heat the air to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the coupling circuit, it can enter the first heat exchange coolant circuit through the coupling circuit.

[0022] Furthermore, the thermal management method of the second combined circuit includes: connecting the water outlet of the electric drive circuit with the water inlet of the heat dissipation circuit, connecting the water inlet of the first heat exchange coolant circuit with the water outlet of the coupling pipeline, connecting the water outlet of the first heat exchange coolant circuit with the water inlet of the warm air core circuit, and connecting the water outlet of the warm air core circuit with the water inlet of the heat dissipation circuit through a multi-way valve; when the coolant flows through the electric drive circuit, the electric drive assembly can be cooled, and when the coolant flows through the heat dissipation circuit, the coolant can dissipate heat or dissipate heat at the same time When the coolant flows through the first heat exchanger in the first heat exchange coolant loop, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat; when the coolant flows through the heater core in the heater core loop, it can heat the air to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the coupling loop, it can enter the first heat exchange coolant loop through the coupling loop; when the coolant flows through the engine loop, it can exchange heat with the engine assembly in the engine loop, so that the coolant flowing through the engine assembly absorbs heat.

[0023] Furthermore, the third combined circuit thermal management method includes: connecting the water inlet end of the battery circuit with the water outlet end of the second heat exchange coolant circuit, and connecting the water outlet end of the battery circuit with the water inlet end of the second heat exchange coolant circuit through a multi-way valve; when the coolant flows through the battery circuit, the battery pack can be cooled or the battery pack can be temperature-controlled uniformly, and when the coolant flows through the second heat exchange coolant circuit, it can exchange heat with the refrigerant in the second heat exchanger, so that the coolant flowing through the second heat exchanger releases heat.

[0024] Furthermore, the fourth combined circuit thermal management method includes: connecting the water outlet of the electric drive circuit with the water inlet of the second heat exchange coolant circuit through a multi-way valve, connecting the water inlet of the heat dissipation circuit with the water outlet of the second heat exchange coolant circuit, and cutting off the interface connected to the coupling pipeline; when the coolant flows through the electric drive circuit, the electric drive assembly can be cooled, when the coolant flows through the heat dissipation circuit, the coolant can absorb heat, and when the coolant flows through the second heat exchange coolant circuit, it can exchange heat with the refrigerant in the second heat exchanger, so that the coolant flowing through the second heat exchanger releases heat.

[0025] Furthermore, the fifth combined circuit thermal management method includes the following two methods:

[0026] Method 1: The fifth combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the battery circuit, and connecting the water inlet end of the battery circuit with the water outlet end of the heater core circuit through a multi-way valve; when the coolant flows through the battery circuit, the battery pack can be heated; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, the coolant can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat; when the coolant flows through the heater core in the heater core circuit, the air can be heated to achieve dehumidification or heating of the passenger compartment.

[0027] Method 2. The fifth combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant 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 of the battery circuit with the water outlet end, and connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the warm air core circuit through a multi-way valve; when the coolant flows through the battery circuit, the battery pack can be heated, when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, the coolant can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat, and when the coolant flows through the warm air core in the warm air core circuit, the air can be heated to achieve dehumidification or heating of the passenger compartment.

[0028] Furthermore, the sixth combined circuit thermal management method includes the following two methods:

[0029] Method 1: The sixth combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the battery circuit through a multi-way valve, connecting the water inlet end of the battery circuit with the water outlet end of the heater core circuit, and selectively connecting the water outlet end of the engine circuit with the water inlet end of the heater core circuit; when the coolant flows through the battery circuit, the battery pack can be heated; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat; when the coolant flows through the heater core in the heater core circuit, it can heat the air to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the engine assembly in the engine circuit, the engine assembly is heat-exchanged, so that the coolant flowing through the engine assembly absorbs heat.

[0030] Method 2: The sixth combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the battery circuit through a multi-way valve, connecting the water inlet end of the battery circuit with the water outlet end of the heater core circuit, connecting the water inlet end of the battery circuit with the water outlet end, and connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the heater core circuit; when the coolant flows through the battery circuit, the battery pack can be heated; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat; when the coolant flows through the heater core in the heater core circuit, it can heat the air to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the engine assembly in the engine circuit, the engine assembly is heat-exchanged, so that the coolant flowing through the engine assembly absorbs heat.

[0031] Furthermore, the seventh combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the warm air core circuit through the multi-way valve; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat, and when the coolant flows through the warm air core in the warm air core circuit, it can heat the air, thereby achieving dehumidification or heating of the passenger compartment.

[0032] Furthermore, the eighth combined circuit thermal management method includes: connecting the water inlet end of the first heat exchange coolant circuit with the water outlet end of the heater 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 heater core circuit; when the coolant flows through the first heat exchanger in the first heat exchange coolant circuit, it can exchange heat with the refrigerant in the first heat exchanger, so that the coolant passing through the first heat exchanger absorbs heat, and when the coolant flows through the heater core in the heater core circuit, it can heat the air to achieve dehumidification or heating of the passenger compartment, and the coolant flows through the engine assembly in the engine circuit for heat exchange, so that the coolant flowing through the engine assembly absorbs heat.

[0033] Furthermore, the ninth combined circuit thermal management method includes: connecting the water outlet of the electric drive circuit with the water inlet of the second heat exchange coolant circuit through a multi-way valve, and connecting the water outlet of the second heat exchange coolant circuit with the water inlet of the coupling circuit; when the coolant flows through the electric drive circuit, the electric drive assembly can be cooled; when the coolant flows through the coupling circuit, the coolant can be introduced into the electric drive circuit through the coupling circuit; when the coolant flows through the second heat exchange coolant circuit, it can exchange heat with the refrigerant in the second heat exchanger, so that the coolant flowing through the second heat exchanger releases heat.

[0034] Furthermore, the single-loop refrigerant thermal management method includes: opening the valve between the first heat exchanger and the evaporator, closing the valve between the first heat exchanger and the second heat exchanger or closing the valve between the first heat exchanger and the evaporator, and opening the valve between the first heat exchanger and the second heat exchanger, so that the compressor and the first heat exchanger are selectively connected to the evaporator or the second heat exchanger; the combined-loop refrigerant thermal management method includes: opening the valve between the first heat exchanger and the evaporator and the valve between the first heat exchanger and the second heat exchanger, so that the compressor and the first heat exchanger are simultaneously connected to the evaporator and the second heat exchanger.

[0035] The beneficial effects of the present invention are as follows: the hybrid vehicle heat pump type thermal management system and thermal management method designed by the present invention have significant advantages in terms of system architecture, function realization, energy saving and consumption reduction, etc., 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 invention includes a plurality of coolant circuits and refrigerant circuits working in coordination. Through a multi-way valve with at least nine interfaces, the connection or cutoff between the interfaces can be flexibly controlled to realize the circulation of multiple coolants, as well as the efficient heat exchange and thermal management control switching between the coolant circuit and the refrigerant circuit. 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, this multi-circuit design and precise control method enables the thermal management of each component to be independently controlled. For example, the electric drive circuit, the heat dissipation circuit, the battery circuit, etc. can be cooled, heated or temperature-controlled according to their own needs, avoiding the mutual restriction between the cooling or heating requirements of different components, and greatly improving the system operation efficiency. Each coolant circuit and refrigerant circuit component is reasonably configured, and each component can work efficiently in its own circuit. The electric drive assembly and two-in-one module in the electric drive circuit, the radiator and cooling fan in the heat dissipation circuit, the battery pack in the battery circuit, etc., can work together under different working conditions under the coordination of the multi-way valve. Through a variety of combined circuit thermal management methods, the system can meet the diverse needs of hybrid vehicles under different working conditions. The first combined circuit thermal management method can simultaneously realize the functions of cooling the electric drive assembly, cooling the coolant or deicing the radiator, dehumidifying or heating the passenger compartment; the second combined circuit thermal management method can achieve battery pack cooling or temperature control and heat exchange with the second heat exchanger. These combinations greatly improve the adaptability of the system to different working conditions. In view of the problem that the heating of the battery pack in the prior art requires additional heat exchange elements and there are problems with limited heat exchange and temperature rise, the present invention solves this problem through a unique circuit design. By using the combination of the battery circuit and other coolant circuits, such as the fifth and sixth combined circuit thermal management methods, the heating of the battery pack can be achieved without additional complex heat exchange elements. This design not only reduces the complexity and cost of the system, but also improves the thermal management effect of the battery pack. The single battery circuit thermal management method can control the uniform temperature of the battery pack to ensure that the battery operates in a stable temperature environment, which helps to extend the battery life and improve battery performance. The single-circuit refrigerant thermal management method allows the compressor and the first heat exchanger to be selectively connected to the second heat exchanger or the evaporator, and the combined circuit refrigerant thermal management method allows the compressor and the first heat exchanger to be connected to the second heat exchanger and the evaporator at the same time. This flexible control method can accurately adjust the flow direction of the refrigerant and the heat exchange components according to the actual heat load requirements, improve the heat exchange efficiency of the refrigerant circuit, and further optimize the performance of the entire thermal management system. When heating in winter, the present invention innovatively uses air source heat pumps and water source heat pump technology with motor waste heat recovery for heating the battery pack and the passenger compartment, which significantly reduces winter heating energy consumption, improves energy utilization efficiency, and reduces vehicle operating costs.In summer cooling conditions, the electric drive system coolant circuit and the water-cooled condenser coolant circuit are designed in parallel, which reduces the coupling between the two, can accurately adjust the cooling capacity according to actual needs, avoid energy waste, and improve the overall performance of the system. Compared with other heat pump systems in the industry, the present invention uses fewer control valves in the coolant and refrigerant circuits, which effectively simplifies the system structure. This not only reduces manufacturing costs, but also reduces system failure points, improves system reliability, and thus improves the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

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

[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 invention;

[0038] Figure 3 It is the refrigerant flow state 1 in the present invention;

[0039] Figure 4 This is the second refrigerant flow state in the present invention;

[0040] Figure 5 This is the refrigerant flow state three in the present invention;

[0041] Figure 6 It is a schematic diagram of the interface connection of each mode of the multi-way valve in the present invention;

[0042] Figure 7 It is a schematic diagram of the coolant flow when the multi-way valve in the present invention is in mode 1, the port b and the port c of the coolant three-way valve are connected, and the coolant flows through the engine assembly;

[0043] Figure 8 It is a schematic diagram of the coolant flow when the multi-way valve is in mode three and the port a and the port c of the coolant three-way valve are connected in the present invention;

[0044] Fig. 9 It is a schematic diagram of the coolant flow when the multi-way valve is in mode seven and the port b and the port c of the coolant three-way valve are connected in the present invention;

[0045] Among them, 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 coolant check valve, 11-second coolant check valve, 12-heat 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 air mixing 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—coolant three-way valve, 30—water heater, 31—thermostat, 32—engine, 100—first refrigerant pipeline, 200—coolant pipeline, 300—electric drive circuit, 400—heat dissipation circuit, 500—battery circuit, 600—coupling circuit, 700—first heat exchange coolant circuit, 800—second heat exchange coolant circuit, 900—warm air core circuit, 1000—engine circuit, 1100—second refrigerant pipeline. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] like Figure 1 As shown in FIG. 2 , the heat pump type thermal management system of the hybrid vehicle designed by the present invention is intended to achieve efficient thermal management control and switching to meet the thermal requirements of the hybrid vehicle under different working conditions. In some embodiments, a water heater 30 (such as Figure 1 In other embodiments, there is no water heater 30 (such as Figure 2 shown).

[0048] Overall system architecture

[0049] The thermal management system designed by the present invention includes a heating, ventilation and air conditioning assembly 20, which includes an evaporator 13 and a heater core 12. The air can be blown into the passenger compartment through a blower 14. The air can be cooled when passing through the evaporator 13, heated when passing through the heater core 12, and dehumidified when passing through the evaporator 13 and the heater core 12 in sequence. In addition, a multi-way valve 19 with nine interfaces, interface one to interface nine, a coolant circuit connected to the nine different interfaces of the multi-way valve 19, and a refrigerant circuit that can exchange heat with the coolant circuit are provided. The multi-way valve 19 realizes the circulation of multiple coolants by controlling the interconnection or cutoff between the interfaces, and at the same time, achieves the control and switching of multiple thermal management by means of the heat exchange between the coolant circuit and the refrigerant circuit.

[0050] Based on the above HVAC assembly 20 , the following specific embodiments of a coolant circuit and a refrigerant circuit are provided.

[0051] Coolant circuit example:

[0052] The coolant circuit includes an electric drive circuit 300 that can realize cooling of the electric drive assembly 17 and heat absorption of the coolant, a heat dissipation circuit 400 that can realize heat release or heat absorption of the coolant, a battery circuit 500 that can realize battery temperature equalization operation, a coupling circuit 600 that can guide the coolant flowing through the heat dissipation circuit 400 into the multi-way valve 19 and is simultaneously connected to the water inlet end of the electric drive circuit 17, a first heat exchange coolant circuit 700 that is connected to the first heat exchanger 2 and can exchange heat with the refrigerant on the exhaust side of the compressor passing through the first heat exchanger 2, and a second heat exchanger 3 that is connected to the second heat exchanger 3 and can exchange heat with the refrigerant on the exhaust side of the compressor passing through the first heat exchanger 2. The second heat exchange coolant circuit 800 enters the second heat exchanger 3 for heat exchange with the refrigerant, the heater core circuit 900 and the engine circuit 1000 are connected to the coolant outlet of the engine 32 and are simultaneously connected to the heater core 12, the coolant outlet of the first heat exchange coolant circuit 700 is connected to the engine coolant inlet of the engine circuit 1000, and the engine coolant outlet of the engine circuit 1000 can be selectively connected to the coolant outlet of the first heat exchange coolant circuit 700 and the coolant inlet of the heater core circuit 900 through the coolant three-way valve 29.

[0053] The electric drive circuit 300 includes a coolant pipeline 200 with one end connected to the interface 8, which is connected to the electric drive assembly 17 and the two-in-one module 16 in sequence. The other end of the coolant 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 includes a coolant pipeline 200 connected to the interface 7, on which a radiator 15 and a cooling fan 9 are arranged, and the other end is connected to the coupling circuit 600 for functions such as heat dissipation of the coolant and deicing of the radiator.

[0055] The battery circuit 500 includes a coolant pipeline 200 with two ends respectively connected to interface five and interface six, on which a battery pack 18 is installed to achieve cooling, heating and uniform temperature control of the battery pack 18.

[0056] The coupling loop 600 includes a coolant pipeline 200 with one end connected to the interface nine, and the other end of the coolant pipeline 200 is connected to the electric drive circuit 300 and the heat dissipation circuit 400, playing the role of connecting and coordinating the electric drive circuit and the heat dissipation circuit.

[0057] The first heat exchange coolant circuit 700 includes a coolant pipeline 200 whose two ends are connected to the interface three and the coolant inlet of the engine 32. It is connected to the first heat exchanger 2, and the circuit can realize the heat exchange function with the refrigerant.

[0058] The second heat exchange coolant loop 800 includes a coolant pipeline 200 with two ends respectively connected to interface 1 and interface 2, and a second heat exchanger 3 is connected thereto, which is mainly used for heat exchange with the refrigerant to meet the heat transfer requirements under different working conditions.

[0059] The warm air core circuit 900 includes a coolant pipe 200 connected to the interface 4 at one end and a coolant three-way valve 29 at the other end, to which the warm air core 12 is connected, and in some cases, a water heater 30 is also connected. The circuit can realize functions such as heating and dehumidification of the passenger compartment.

[0060] The engine circuit 1000 includes an engine assembly 27, which includes an engine 32 and a thermostat 31. The engine 32, the thermostat 31 and the second radiator 28 are connected in series through a coolant pipeline 200, wherein the second radiator 28 is also connected to a cooling fan 9, and the coolant outlet of the engine 32 is connected to a coolant three-way valve 29, through which the first heat exchange coolant circuit 700 and the warm air core circuit 29 can be selectively connected. This circuit can realize functions such as heat dissipation of the engine assembly 27.

[0061] Refrigerant circuit example:

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

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

[0064] The second refrigerant circuit includes a second refrigerant pipeline 1100, which is connected in parallel to the second heat exchanger 3, and the evaporator 13 is connected to the second refrigerant pipeline 1100. One end of the second refrigerant pipeline 1100 is connected to the air intake 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 functions of refrigeration, dehumidification of the passenger compartment and cooling of the battery pack can be achieved.

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

[0067] like Figure 1 As shown in FIG. 9 , the heat pump thermal management system based on the above hybrid vehicle can achieve thermal management under the following working conditions:

[0068] Example 1: Dual cooling conditions in summer

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

[0070] The refrigerant on the exhaust side 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, 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. The air is taken in by the blower 14 to exchange heat with the evaporator and release heat, thus completing the refrigeration of the passenger compartment. The refrigerant flows to the following directions: Figure 3 The third electronic water pump 8 is running, 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.

[0071] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the exhaust gas of the compressor 1 exchanges heat with the coolant flowing through it in the first heat exchanger 2, and the coolant absorbs heat and flows through the port b to the port c of the coolant three-way valve 29, and then enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 system).

[0072] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, and the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, taking away the heat of both, and then flow through interface eight to interface seven of the multi-way valve 19 and merge with the coolant passing through the heater core 12 to enter the first radiator 15. Through the cooling fan 9 or the vehicle facing the wind and heat exchange with the outside air, the coolant releases heat and cools, and then flows into the second coolant one-way valve 11 and interface nine respectively. The coolant flowing through interface nine enters interface three to the first coolant one-way valve 10 to complete the cycle.

[0073] If there is no demand from the electric drive assembly 17, the second electronic water pump 7 stops, the second coolant one-way valve 11 is closed, and the coolant passes through the heater core 12 and enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. After the coolant releases heat and cools, it flows into the interface nine of the multi-way valve 19, and then flows through the interface three to the first coolant one-way valve 10 to complete the cycle.

[0074] If the engine assembly 27 has a cooling demand, the large cycle is started, and the coolant enters the second radiator 28, exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat and cools down before flowing into the engine assembly 27, completing the cycle.

[0075] If the engine assembly 27 has no demand, the large cycle is closed.

[0076] Embodiment 2: Refrigeration condition of a single passenger cabin in summer.

[0077] The multi-way valve 19 is in mode 1, the connected state is interface one through interface six, interface two through interface five, interface three through interface nine, interface four + interface eight through interface seven, and the state of the coolant three-way valve 29 is b through c.

[0078] The refrigerant on the exhaust side 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, and then enters the evaporator 13 after being throttled by the second electronic expansion valve 5. The air is taken in by the blower 14 to exchange heat with the evaporator to release heat, completing the refrigeration of the passenger compartment. At this time, the first electronic expansion valve 4 is closed, and the refrigerant flows to Figure 4 .

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

[0080] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, and the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, taking away the heat of both and then merging with the coolant passing through the warm air core 12 to enter the first radiator 15, and heat exchange with the outside air through the cooling fan 9 or the vehicle facing the wind. After the coolant releases heat and cools, it will flow into the second coolant one-way valve 11 and the interface nine of the multi-way valve 19 respectively, and then through the interface three to the first coolant one-way valve 10 to complete the cycle.

[0081] If there is no demand from the electric drive assembly 17, the second electronic water pump 7 stops, the second coolant one-way valve 11 is closed, and the coolant passes through the heater core 12 and enters the first radiator 15. The coolant exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat and cools down. Then, it flows into the interface nine and the interface three of the multi-way valve 19 to the first coolant one-way valve 10, completing the cycle.

[0082] If the battery pack 18 has a requirement for temperature equalization at this time, the third electronic water pump 8 will be operated.

[0083] If the battery pack 18 has no temperature equalization requirement at this time, the third electronic water pump 8 stops.

[0084] If the engine assembly 27 has a cooling demand, the large circulation is started, and the coolant enters the second radiator 28, exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat and cools, and then flows into the engine assembly 27 to complete the circulation.

[0085] If the engine assembly 27 has no demand, the large cycle is closed.

[0086] Embodiment 3: Single battery pack cooling condition during vehicle charging.

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

[0088] The refrigerant on the exhaust side 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, and then enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4. At this time, the second electronic expansion valve 5 is closed, and the refrigerant flows to Figure 5 .

[0089] The third electronic water pump 8 is running, 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 cooling.

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

[0091] The second electronic water pump 7 stops, the second coolant one-way valve 11 is closed, and the coolant flowing through the heater core 12 enters the first radiator 15, exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat to complete the cycle.

[0092] Embodiment 4: Dehumidification working condition of passenger compartment in spring and autumn.

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

[0094] The refrigerant on the exhaust side 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, and then enters the second heat exchanger 3 and the evaporator 13 after being throttled by the second electronic expansion valve 5. The air is taken in by the blower 14 to exchange heat with the evaporator and release heat. At this time, the first electronic expansion valve 4 is closed, and the refrigerant flows to Figure 4 .

[0095] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the exhaust gas of the compressor 1 exchanges heat with the coolant in the first heat exchanger 2, and the coolant absorbs heat and flows through the port b to the port c of the coolant three-way valve 29, and then enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 system), through the cold and warm air mixing damper 22, the air flows through the heater core 12 and exchanges heat with the coolant therein to absorb heat, thereby completing the dehumidification of the passenger compartment.

[0096] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, and the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, taking away the heat of both and then merging with the coolant passing through the warm air core 12 to enter the first radiator 15, and heat exchange with the outside air through the cooling fan 9 or the vehicle facing the wind. After the coolant releases heat and cools, it will flow into the second coolant one-way valve 11 and the interface nine of the multi-way valve 19 respectively, and then pass through the interface three to the first coolant one-way valve 10 to complete the cycle.

[0097] If the electric drive assembly 17 has no cooling demand, the second electronic water pump 7 stops, the second coolant one-way valve 11 is closed, and the coolant passes through the heater core 12 and enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. After the coolant releases heat and cools, it flows into the interface nine of the multi-way valve 19, and then flows through the interface three to the first coolant one-way valve 10 to complete the cycle.

[0098] If the battery pack 18 has a requirement for temperature equalization at this time, the third electronic water pump 8 will be operated.

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

[0100] If the battery pack 18 needs to be cooled at this time, the first electronic expansion valve 4 will throttle, the third electronic water pump 8 will start, the coolant will flow through the battery pack 18, and heat will be exchanged with the refrigerant in the second heat exchanger 3. After the coolant releases heat and cools down, it will enter the battery pack 18 through the third electronic water pump 8 to complete the cooling. The refrigerant flows to Figure 3 .

[0101] If the engine assembly 27 has a cooling demand, the large circulation is started, and the coolant enters the second radiator 28, exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat and cools, and then flows into the engine assembly 27 to complete the circulation.

[0102] If the engine assembly 27 has no demand, the large cycle is closed.

[0103] Embodiment 5: Special working condition: After intense driving in winter, the battery pack 18 needs to be cooled during charging, and the passenger compartment needs to be heated.

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

[0105] The refrigerant on the exhaust side 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, and then enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4. The refrigerant flows to Figure 5 shown.

[0106] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the exhaust gas of the compressor 1 exchanges heat with the coolant in the first heat exchanger 2, and the coolant absorbs heat and flows through the port b to the port c of the coolant three-way valve 29, and then enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0107] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, and the coolant flows through the two-in-one module 16 and the electric drive assembly 17, takes away the heat of both, and then merges with the coolant passing through the heater core 12 to enter the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, the coolant releases heat, and the cycle is completed.

[0108] The third electronic water pump 8 is running, 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 cooling.

[0109] If the engine assembly 27 has a cooling demand, the large circulation is started, and the coolant enters the second radiator 28, exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind, and the coolant releases heat and cools, and then flows into the engine assembly 27 to complete the circulation.

[0110] If the engine assembly 27 has no demand, the large cycle is closed.

[0111] Embodiment 6: Special working condition: radiator deicing.

[0112] The multi-way valve 19 is in mode 1, the connection status is interface 1 to interface 6, interface 2 to interface 5, interface 3 to interface 9, interface 4 + interface 8 to interface 7, compressor 1 is stopped, and the refrigerant circuit is stationary.

[0113] When the engine assembly 27 has no waste heat to utilize, the state of the coolant three-way valve 29 is b-to-c. Figure 1 In the system shown, the first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2 and then flows through the b port to the c port of the coolant three-way valve 29, and then enters the water heater 30. At this time, the water heater 30 works to heat the coolant flowing through it, and then the coolant flows through the heater core 12. The second electronic water pump 7 stops, the second coolant one-way valve 11 is turned off, 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 deicing. Figure 2 In the system shown, the second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, and the electric drive assembly 17 generates heat to heat the coolant flowing through it. The first electronic water pump 6 is stopped, the first coolant one-way valve 10 is cut off, and the coolant flowing through the electric drive assembly 17 enters the first radiator 15, and the coolant dissipates heat to the outer surface of the first radiator 15, completing de-icing.

[0114] When the engine assembly 27 has waste heat available, the state of the coolant three-way valve 29 is a-c, the first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, the coolant enters the coolant three-way valve 29 from port a to port c, and enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The cooling liquid flows through the heater core 12, the second electronic water pump 7 stops, the second cooling liquid one-way valve 11 is closed, the cooling liquid flows through the heater core 12 and enters the first radiator 15, the cooling liquid dissipates heat to the outer surface of the first radiator 15, and the de-icing is completed.

[0115] Embodiment 7: In the dual heating condition in winter when the air source heat pump is available 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 connected state is interface one through interface eight, interface two through interface seven, interface three through interface six, interface four through interface five, interface nine is cut off, and the state of the coolant three-way valve 29 is b through c.

[0117] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system) and then enters the second heat exchanger 3.

[0118] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, where it exchanges heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. 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, and the refrigerant flows to Figure 5 shown.

[0119] The coolant flows through the second heat exchanger 3 and enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. The coolant absorbs heat from the outside air, and the outside air releases heat, completing the cycle.

[0120] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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, the refrigerant releases heat, and then the coolant flows through the port b of the coolant three-way valve 29 to the port c 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 the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0121] The third electronic water pump 8 is running, and the coolant from the heater core 12 enters the water inlet of the battery pack 18 after passing through the third electronic water pump 8, flows through the battery pack 18 to complete the heating of the battery pack, and then returns to the first coolant one-way valve 10 to complete the cycle.

[0122] Embodiment 8: In winter, when the air source heat pump is available and there is no engine waste heat, the single battery pack is used for heating, and the heater core 12 does not exchange heat but only acts as a flow resistance.

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

[0124] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system) and then enters the second heat exchanger 3.

[0125] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after throttling by the first electronic expansion valve 4 to exchange heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. 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, and the refrigerant flows to Figure 5 shown.

[0126] After flowing through the second heat exchanger 3, the coolant enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. The coolant absorbs heat from the outside air, and the outside air releases heat, completing the cycle.

[0127] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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, the refrigerant releases heat, and then the coolant flows through the port b of the coolant three-way valve 29 to the port c 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 blower 14 stops and the heater core 12 does not exchange heat.

[0128] The third electronic water pump 8 is running, and the coolant from the heater core 12 enters the water inlet of the battery pack 18 after passing through the third electronic water pump 8, flows through the battery pack 18 to complete the heating of the battery pack, and then returns to the first coolant one-way valve 10 to complete the cycle.

[0129] Embodiment 9: In the dual heating condition in winter when the air source heat pump is available and there is no engine waste heat, the outlet water temperature of the heater core is higher than the acceptable threshold of the inlet water temperature of the battery pack, and the outlet water of the battery pack needs to be partially mixed into its water inlet.

[0130] The multi-way valve 19 is in mode 3, the connected state is interface one through interface eight, interface two through interface seven, interface three, interface four, interface five, interface six mixed water, interface nine cut-off, and the coolant three-way valve 29 state is b through c.

[0131] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system) and then enters the second heat exchanger 3.

[0132] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after throttling by the first electronic expansion valve 4 to exchange heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. 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, and the refrigerant flows to Figure 5 shown.

[0133] The coolant flows through the second heat exchanger 3 and enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. The coolant absorbs heat from the outside air, and the outside air releases heat, completing the cycle.

[0134] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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 and flows through the port b to the 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 the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0135] At this time, interface four and interface six of the multi-way valve 19 are connected to interface three and interface five. The coolant after flowing through the heater core 12 enters interface four of the multi-way valve 19 and is then diverted to interface three and interface five. The third electronic water pump 8 is running, and the coolant after flowing through the battery pack 18 enters interface six of the multi-way valve 19 and is then diverted to interface three and interface five. Part of the outlet coolant of the battery pack 18 and part of the coolant flowing through the heater core 12 are mixed at interface five and then returned to the water inlet of the battery pack 18, completing the heating of the battery pack 18 and controlling its water inlet temperature within the required temperature. At the same time, part of the outlet water of the battery pack 18 is mixed at interface six of the multi-way valve 19 with the coolant flowing through the heater core 12 and diverted to interface four and returned to the first coolant one-way valve 10, completing the water circuit circulation.

[0136] Embodiment 10: Single passenger cabin heating condition in winter when air source heat pump is available and there is no engine waste heat.

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

[0138] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system) and then enters the second heat exchanger 3.

[0139] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, and exchanges heat with the coolant flowing therein. The refrigerant absorbs heat from the coolant, and the coolant releases heat. 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, and the refrigerant flows to Figure 5 shown.

[0140] After flowing through the second heat exchanger 3, the coolant enters the first radiator 15, and exchanges heat with the outside air through the cooling fan 9 or the vehicle facing the wind. The coolant absorbs heat from the outside air, and the outside air releases heat, completing the cycle.

[0141] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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, the refrigerant releases heat, and then the coolant flows through the port b of the coolant three-way valve 29 to the port c 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 the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0142] If the battery pack 18 has a requirement for temperature equalization at this time, the third electronic water pump 8 will be operated.

[0143] If the battery pack 18 has no temperature equalization requirement at this time, the third electronic water pump 8 stops.

[0144] Embodiment 11: In a dual heating condition in a cold region when an air source heat pump is unavailable, a 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 inlet water temperature of the battery pack.

[0145] The multi-way valve 19 is in mode 5, the connected state is interface one through interface eight, interface two through interface nine, interface three through interface six, interface four through interface five, interface seven is cut off, and the state of the coolant three-way valve 29 is b through c.

[0146] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system), takes away the heat and enters the second heat exchanger 3, where it returns to the second coolant one-way valve 11 after heat exchange, completing the cycle.

[0147] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, where it exchanges heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. The refrigerant after flowing through the second heat exchanger 3 enters the air intake port of the compressor 1 to complete the cycle. At this time, the second electronic expansion valve 5 is closed, and the refrigerant flows to Figure 5 .

[0148] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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 in heating the coolant, such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0149] The third electronic water pump 8 is running, and the coolant from the heater core 12 enters the water inlet of the battery pack 18 after passing through the third electronic water pump 8, flows through the battery pack 18 to complete the heating of the battery pack, and then returns to the first coolant one-way valve 10 to complete the cycle.

[0150] Embodiment 12: In cold regions, when air source heat pumps are unavailable, water source heat pumps are available, and there is no engine waste heat, the single battery pack heating condition, the heater core does not exchange heat and only acts as a flow resistance.

[0151] The multi-way valve 19 is in mode 5, the connected state is interface one through interface eight, interface two through interface nine, interface three through interface six, interface four through interface five, interface seven is cut off, and the state of the coolant three-way valve 29 is b through c.

[0152] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 1 system), takes away the heat and enters the second heat exchanger 3, where it returns to the second coolant one-way valve 11 after heat exchange, completing the cycle.

[0153] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, where it exchanges heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. The refrigerant after flowing through the second heat exchanger 3 enters the compressor intake port to complete the cycle, and at this time the second electronic expansion valve 5 is closed.

[0154] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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, the refrigerant releases heat, and 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 in heating the coolant, such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The blower 14 stops and the heater core 12 does not exchange heat.

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

[0156] Embodiment 13: In a dual heating condition in a cold region when air source heat pumps are unavailable, water source heat pumps are available, and there is no engine waste heat, the outlet water temperature of the heater core 12 is higher than the acceptable threshold of the inlet water temperature of the battery pack 18, and the outlet water of the battery pack 18 needs to be partially mixed into its water inlet.

[0157] The multi-way valve 19 is in mode 6, the connected state is interface one through interface eight, interface two through interface nine, interface three, interface four, interface five, interface six mixed water, interface seven cut-off, and the coolant three-way valve 29 state is b through c.

[0158] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 1system), takes away the heat and enters the second heat exchanger 3, where it returns to the second coolant one-way valve 11 after heat exchange, completing the cycle.

[0159] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, and exchanges heat with the coolant. The refrigerant absorbs heat from the coolant, and the coolant releases heat. The refrigerant after flowing through the second heat exchanger 3 enters the air intake of the compressor 1 to complete the cycle. At this time, the second electronic expansion valve 5 is closed (such as Figure 5 shown).

[0160] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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, the refrigerant releases heat, and 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 in heating the coolant, such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0161] At this time, interface four and interface six of the multi-way valve 19 are connected with interface three and interface five. The coolant after flowing through the heater core 12 enters interface four of the multi-way valve 19 and is then diverted to interface three and interface five. The third electronic water pump 8 is running, and the coolant after flowing through the battery pack 18 enters interface six of the multi-way valve 19 and is then diverted to interface three and interface five. Part of the outlet coolant of the battery pack 18 and part of the coolant flowing through the heater core 12 are mixed at interface five and then returned to the water inlet of the battery pack 18, completing the heating of the battery pack 18 and controlling its water inlet temperature within the required temperature. At the same time, part of the water outlet of the battery pack 18 is mixed at interface six of the multi-way valve 19 with the coolant flowing through the heater core 12 that is diverted to interface four and then returned to the first coolant one-way valve 10, completing the water circuit circulation.

[0162] Embodiment 14: Single passenger cabin heating operating condition in cold regions when air source heat pump is unavailable, water source heat pump is available, and there is no engine waste heat.

[0163] The multi-way valve 19 is in mode 7, the connected state is interface one through interface eight, interface two through interface nine, interface three through interface four, interface five through interface six, interface seven is cut off, and the state of the coolant three-way valve 29 is b through c.

[0164] The second electronic water pump 7 is running, the second coolant one-way valve 11 is turned on, 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 system), takes away the heat and enters the second heat exchanger 3, where it returns to the second coolant one-way valve 11 after heat exchange, completing the cycle.

[0165] The refrigerant on the exhaust side 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, and enters the second heat exchanger 3 after being throttled by the first electronic expansion valve 4, and exchanges heat with the coolant flowing therein. The refrigerant absorbs heat from the coolant, and the coolant releases heat. 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 (such as Figure 5 shown).

[0166] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, 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 in heating the coolant, such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to intake air so that the air exchanges heat with the heater core 12 to absorb heat, and the coolant releases heat, thereby completing the heating of the passenger compartment.

[0167] If the battery pack 18 has a requirement for temperature equalization at this time, the third electronic water pump 8 will be operated.

[0168] If the battery pack 18 has no temperature equalization requirement at this time, the third electronic water pump 8 stops.

[0169] Embodiment 15: Dual heating condition when engine waste heat is available, the heater 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, the connected state is interface one through interface eight, interface two through interface seven, interface three through interface six, interface four through interface five, interface nine is cut off, and the state of the coolant three-way valve 29 is a through c.

[0171] The compressor 1 stops and the refrigerant circuit is at rest.

[0172] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, enters the coolant three-way valve 29 from port a to port c, and enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to take in air, so that the air and the heater core 12 undergo heat exchange and absorb heat, while the coolant releases heat, thereby completing the heating of the passenger compartment.

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

[0174] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, and the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, taking away the heat of both, and then flow through the second heat exchanger 3 and enter the first radiator 15. Through the cooling fan 9 or the vehicle facing the wind, the coolant will exchange heat with the outside air, release heat and cool down, and then return to the second coolant one-way valve 11 to complete the cycle.

[0175] If the electric drive assembly 17 has no cooling requirement, the second electronic water pump 7 stops.

[0176] Embodiment 16: In the single battery pack heating condition when the engine waste heat is available, the heater core does not exchange heat but only acts as a flow resistance.

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

[0178] The compressor 1 stops and the refrigerant circuit is at rest.

[0179] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, enters the coolant three-way valve 29 from port a to port c, and enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The blower 14 stops and the heater core 12 does not exchange heat.

[0180] The third electronic water pump 8 is running, and the coolant from the heater core 12 enters the water inlet of the battery pack 18 after passing through the third electronic water pump 8, flows through the battery pack 18 to complete the heating of the battery pack, and then returns to the first coolant one-way valve 10 to complete the cycle.

[0181] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, take away the heat of both, flow through the second heat exchanger 3 into the first radiator 15, and exchange heat with the outside air through the cooling fan 9 or the vehicle facing the wind, the coolant releases heat and cools, and then returns to the second coolant one-way valve 11 to complete the cycle.

[0182] If the electric drive assembly 17 has no cooling requirement, the second electronic water pump 7 stops.

[0183] Embodiment 17: In dual heating conditions when engine waste heat is available, the outlet water temperature of the heater core is higher than the acceptable threshold of the inlet water temperature of the battery pack, and part of the outlet water of the battery pack needs to be mixed into its water inlet.

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

[0185] The compressor 1 stops and the refrigerant circuit is at rest.

[0186] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, enters the coolant three-way valve 29 from port a to port c, and enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to take in air, so that the air and the heater core 12 undergo heat exchange and absorb heat, while the coolant releases heat, thereby completing the heating of the passenger compartment.

[0187] At this time, interface four and interface six of the multi-way valve 19 are connected to interface three and interface five. The coolant after flowing through the heater core 12 enters interface four of the multi-way valve 19 and is then diverted to interface three and interface five. The third electronic water pump 8 is running, and the coolant after flowing through the battery pack 18 enters interface six of the multi-way valve 19 and is then diverted to interface three and interface five. Part of the outlet coolant of the battery pack 18 and part of the coolant flowing through the heater core 12 are mixed at interface five and then returned to the water inlet of the battery pack 18, completing the heating of the battery pack 18 and controlling its water inlet temperature within the required temperature. At the same time, part of the outlet water of the battery pack 18 is mixed at interface six of the multi-way valve 19 with the coolant flowing through the heater core 12 and diverted to interface four and returned to the first coolant one-way valve 10, completing the water circuit circulation.

[0188] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, take away the heat of both, flow through the second heat exchanger 3, and then enter the first radiator 15, through the cooling fan 9 or the vehicle facing the wind and exchanging heat with the outside air, the coolant releases heat and cools, and then returns to the second coolant one-way valve 11 to complete the cycle.

[0189] If the electric drive assembly 17 has no cooling requirement, the second electronic water pump 7 stops.

[0190] Embodiment 18: Single passenger cabin heating condition when engine waste heat is available.

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

[0192] The first electronic water pump 6 is running, the first coolant one-way valve 10 is turned on, the coolant flows through the first heat exchanger 2, enters the engine assembly 27, and after absorbing the waste heat, enters the coolant three-way valve 29 from port a to port c, and enters the water heater 30 (such as Figure 1 system) or directly into the warm air core 12 (such as Figure 2 The system) uses the blower 14 to take in air, so that the air and the heater core 12 undergo heat exchange and absorb heat, while the coolant releases heat, thereby completing the heating of the passenger compartment.

[0193] If the electric drive assembly 17 has a cooling demand, the second electronic water pump 7 will start, the second coolant one-way valve 11 will be turned on, the coolant will flow through the two-in-one module 16 and the electric drive assembly 17, take away the heat of both, flow through the second heat exchanger 3, and then enter the first radiator 15, through the cooling fan 9 or the vehicle facing the wind and exchanging heat with the outside air, the coolant releases heat and cools, and then returns to the second coolant one-way valve 11 to complete the cycle.

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

[0195] If the battery pack 18 has a requirement for temperature equalization at this time, the third electronic water pump 8 will be operated.

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

[0197] In summary, the hybrid vehicle heat pump type thermal management system and thermal management method designed in the present invention have significant advantages in system architecture, function realization, energy saving and consumption reduction, etc., 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 for a hybrid vehicle, comprising a heating, ventilation and air conditioning assembly (20), which includes an evaporator (13) and a heater core (12), characterized in that: It also includes a multi-way valve (19) having at least nine interfaces, a cooling liquid circuit connected to the nine different interfaces of the multi-way valve (19), and a refrigerant circuit capable of performing heat exchange with the cooling liquid circuit; The nine interfaces include interface one to interface nine; The coolant circuit comprises 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 the first heat exchanger (2), a second heat exchange coolant circuit (800) connected to the second heat exchanger (3), a heater core circuit (900) and an engine circuit (1000), wherein the coolant outlet of the first heat exchange coolant circuit (700) is connected to the engine coolant inlet of the engine circuit (1000), and the engine coolant outlet of the engine circuit (1000) can be selectively connected to the coolant outlet of the first heat exchange coolant circuit (700) and the coolant inlet of the heater core circuit (900); The refrigerant circuit comprises 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) can realize the circulation flow of various cooling liquids by controlling the mutual connection or cutoff between various interfaces, and realize the control and switching of various thermal management through the heat exchange between the cooling liquid circuit and the refrigerant circuit.

2. The heat pump type thermal management system for a hybrid vehicle as claimed in claim 1, characterized in that: One end of the electric drive circuit (300), one end of the heat dissipation circuit (400), one end of the coupling circuit (600), one end of the first heat exchange coolant circuit (700), and one end of the warm air core circuit (900) are respectively connected to any five different interfaces among the interfaces one to nine; both ends of the battery circuit (500) and both ends of the second heat exchange coolant circuit (800) are connected to any two interfaces among the remaining four interfaces among the interfaces one to nine, and both ends of the battery circuit (500) and both ends of the second heat exchange coolant circuit (800) are connected to four different interfaces.

3. The heat pump type thermal management system for a hybrid vehicle as claimed in claim 1, characterized in that: The electric drive circuit (300) comprises a coolant pipeline (200) connected to the interface 8 at one end, the coolant pipeline (200) connected to the interface 8 is connected to the electric drive assembly (17) and the two-in-one module (16), and the other end of the coolant pipeline (200) connected to the interface 8 is connected to the coupling circuit (600); The heat dissipation circuit (400) comprises a coolant pipeline (200) connected to the interface 7 at one end, the coolant pipeline (200) connected to the interface 7 is connected to a first radiator (15) and a heat dissipation fan (9), and the other end of the coolant pipeline (200) connected to the interface 7 is connected to the coupling circuit (600); The battery circuit (500) comprises a cooling liquid pipeline (200) with two ends respectively connected to the interface five and the interface six, and a battery pack (18) is connected to the cooling liquid pipeline (200) between the interface five and the interface six; The coupling circuit (600) comprises a cooling liquid pipeline (200) having one end connected to the interface nine, and the other end of the cooling liquid pipeline (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 coolant circuit (700) comprises a coolant pipeline (200) whose two ends are respectively connected to the interface three and the engine coolant inlet of the engine circuit (1000), and the first heat exchanger (2) is connected to the coolant pipeline (200) between the interface three and the engine coolant inlet of the engine circuit (1000); The second heat exchange coolant circuit (800) comprises a coolant pipeline (200) with two ends respectively connected to the first interface and the second interface, and the second heat exchanger (3) is connected to the coolant pipeline (200) between the first interface and the second interface; The heater core circuit (900) comprises an engine coolant outlet of the engine circuit (1000) and a coolant pipeline (200) on the interface four, both ends of which are respectively connected to the engine coolant outlet of the engine circuit (1000), and the heater core (12) is connected to the coolant pipeline (200) between the engine coolant outlet and the interface four; The engine circuit (1000) comprises an engine assembly (27), a second radiator (28) and a cooling fan (9) which are connected in series via a coolant pipeline (200); the engine coolant outlet can be selectively connected to the coolant outlet of the first heat exchange coolant circuit (700) and the coolant inlet of the warm air core circuit (900) via a coolant three-way valve (29) and a coolant pipeline (200).

4. The heat pump type thermal management system for a hybrid vehicle as claimed in claim 3, characterized in that: The warm air core circuit (900) also includes a water heater (30) connected to the coolant pipeline (200) between the engine coolant outlet and the interface 4.

5. The heat pump type thermal management system for a hybrid vehicle as claimed in claim 1, characterized in that: The first refrigerant series circuit comprises a first refrigerant pipeline (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 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 air intake side of the compressor (1), and the other end of the second refrigerant pipeline (1100) is connected to the first refrigerant pipeline (100) located between the first heat exchanger (2) and the second heat exchanger (3).

6. A thermal management method for a heat pump type thermal management system of a hybrid vehicle based on any one of claims 1 to 5, characterized in that: It includes a coolant circuit thermal management method and a refrigerant circuit thermal piping method; The coolant circuit thermal management method includes a single-circuit coolant thermal management method for individually controlling one or more of the coolant circuits and a combined-circuit coolant thermal management method for connecting any at least two of the coolant circuits to form at least one circulating coolant circuit; The refrigerant circuit thermal management method includes a single-circuit refrigerant thermal management method in which the compressor (1) is connected to the first heat exchanger (2) or the second heat exchanger (3), or the compressor (1) is connected to the first heat exchanger (2) and the evaporator (13), and a combined-circuit refrigerant thermal management method in which the compressor (1) is connected to the first heat exchanger (2), the second heat exchanger (3) and the evaporator (13).

7. The thermal management method of the heat pump type thermal management system of a hybrid vehicle as claimed in claim 6, characterized in that: 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 comprises: connecting the water inlet and the water outlet of the battery circuit (500) through a multi-way valve (19), allowing the coolant to flow through the battery pack (18), and performing uniform temperature control on the battery pack (18); The single first heat exchange coolant loop thermal management method comprises: connecting the water inlet and the water outlet of the first heat exchange coolant loop (700) through a multi-way valve (19), allowing the coolant to pass through the first heat exchanger (2) and perform heat exchange with the refrigerant in the first heat exchanger (2), so that the coolant flowing through the first heat exchanger (2) absorbs heat; The single engine circuit thermal management method comprises: pumping coolant into the engine (32), passing through a second radiator (28), and then reintroducing the coolant into the engine (32).

8. The thermal management method of the heat pump type thermal management system of a hybrid vehicle as claimed in claim 6, characterized in that: The combined circuit coolant thermal pipeline method comprises a first combined circuit thermal management method for combining the electric drive circuit (300), the heat dissipation circuit (400), the coupling circuit (600), the first heat exchange coolant circuit (700) and the warm air core circuit (900) and performing thermal management control; a second combined circuit thermal management method for combining the electric drive circuit (300), the heat dissipation circuit (400), the coupling circuit (600), the first heat exchange coolant circuit (700), the warm air core circuit (900) and the engine circuit (1000) and performing thermal management control; a third combined circuit thermal management method for combining the second heat exchange coolant circuit (800) and the battery circuit (500) and performing thermal management control; a fourth combined circuit thermal management method for combining the electric drive circuit (300), the heat dissipation circuit (400) and the second heat exchange coolant circuit (800) and performing thermal management control; and a fourth combined circuit thermal management method for combining the electric drive circuit (300), the heat dissipation circuit (400) and the second heat exchange coolant circuit (800) and performing thermal management control. A fifth combined circuit thermal management method for combining a heat exchange coolant circuit (700), the heater core circuit (900) and the battery circuit (500) and performing thermal management control; a sixth combined circuit thermal management method for combining the first heat exchange coolant circuit (700), the heater core circuit (900), the engine circuit (1000) and the battery circuit (500) and performing thermal management control; a seventh combined circuit thermal management method for combining the first heat exchange coolant circuit (700) and the heater core circuit (900) and performing thermal management control; an eighth combined circuit thermal management method for combining the first heat exchange coolant circuit (700), the heater core circuit (900) and the engine circuit (1000) and performing thermal management control; and a ninth combined circuit thermal management method for combining the electric drive circuit (300), the coupling circuit (600) and the second heat exchange coolant circuit (800) and performing thermal management control.

9. The thermal management method of the heat pump type thermal management system of a hybrid vehicle as claimed in claim 8, characterized in that: The first combined circuit thermal management method comprises: connecting the water outlet of the electric drive circuit (300) to the water inlet of the heat dissipation circuit (400) through a multi-way valve (19), connecting the water inlet of the first heat exchange coolant circuit (700) to the water outlet of the coupling pipeline (600), connecting the water outlet of the first heat exchange coolant circuit (700) to the water inlet of the warm air core circuit (900), and connecting the water outlet of the warm air core circuit (900) to the water inlet of the heat dissipation circuit (400); when the coolant flows through the electric drive circuit (300), the electric drive assembly (17) can be cooled. When the coolant flows through the heat dissipation circuit (400), the coolant can dissipate heat or simultaneously de-ice the radiator (15); when the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), the coolant can exchange heat with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat; when the coolant flows through the heater core (12) in the heater core circuit (900), the coolant can heat the air, so as to dehumidify or heat the passenger compartment; when the coolant flows through the coupling circuit, the coolant can enter the first heat exchange coolant circuit (700) through the coupling circuit (600); The second combined circuit thermal management method comprises: connecting the water outlet of the electric drive circuit (300) to the water inlet of the heat dissipation circuit (400) through a multi-way valve (19), connecting the water inlet of the first heat exchange coolant circuit (700) to the water outlet of the coupling pipeline (600), connecting the water outlet of the first heat exchange coolant circuit (700) to the water inlet of the warm air core circuit (900), and connecting the water outlet of the warm air core circuit (900) to the water inlet of the heat dissipation circuit (400); when the coolant flows through the electric drive circuit (300), the electric drive assembly (17) can be cooled; when the coolant flows through the heat dissipation circuit (400), the coolant can dissipate heat or simultaneously realize the radiator ( 15), when the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), it can exchange heat with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat, when the coolant flows through the heater core (12) in the heater core circuit (900), it can heat the air to achieve dehumidification or heating of the passenger compartment, when the coolant flows through the coupling circuit, it can enter the first heat exchange coolant circuit (700) through the coupling circuit (600), when the coolant flows through the engine circuit (1000), it can exchange heat with the engine assembly (27) in the engine circuit (1000), so that the coolant flowing through the engine assembly (27) absorbs heat; The third combined circuit thermal management method comprises: connecting the water inlet of the battery circuit (500) to the water outlet of the second heat exchange cooling liquid circuit (800) through a multi-way valve (19), and connecting the water outlet of the battery circuit (500) to the water inlet of the second heat exchange cooling liquid circuit (800); when the coolant flows through the battery circuit (500), the battery pack (18) can be cooled or the temperature of the battery pack (18) can be uniformly controlled; when the coolant flows through the second heat exchange cooling liquid circuit (800), the coolant can exchange heat with the refrigerant in the second heat exchanger (3), so that the coolant flowing through the second heat exchanger (3) releases heat; The fourth combined circuit thermal management method comprises: connecting the water outlet of the electric drive circuit (300) to the water inlet of the second heat exchange coolant circuit (800) through a multi-way valve (19), connecting the water inlet of the heat dissipation circuit (400) to the water outlet of the second heat exchange coolant circuit (800), and cutting off the interface connected to the coupling pipeline (600); when the coolant flows through the electric drive circuit (300), the electric drive assembly (17) can be cooled; when the coolant flows through the heat dissipation circuit (400), the coolant can absorb heat; when the coolant flows through the second heat exchange coolant circuit (800), the coolant can exchange heat with the refrigerant in the second heat exchanger (3), so that the coolant flowing through the second heat exchanger (3) releases heat; The fifth combined circuit thermal management method comprises: connecting the water inlet end of the first heat exchange coolant circuit (700) with the water outlet end of the battery circuit (500) through a multi-way valve (19), and connecting the water inlet end of the battery circuit (500) with the water outlet end of the warm air core circuit (900); when the coolant flows through the battery circuit (500), the battery pack (18) can be heated; when the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), heat exchange can be performed with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat; when the coolant flows through the warm air core (12) in the warm air core circuit (900), the air can be heated to achieve dehumidification or heating of the passenger compartment; The fifth combined circuit thermal management method further comprises: connecting the water inlet end and the water outlet end of the battery circuit (500), and connecting the water inlet end of the first heat exchange coolant circuit (700) and the water outlet end of the warm air core circuit (900); The sixth combined circuit thermal management method comprises: connecting the water inlet of the first heat exchange coolant circuit (700) with the water outlet of the battery circuit (500) through a multi-way valve (19), connecting the water inlet of the battery circuit (500) with the water outlet of the warm air core circuit (900), and selectively connecting the water outlet of the engine circuit (1000) with the water inlet of the warm air core circuit (900); when the coolant flows through the battery circuit (500), the battery pack (18) can be heated and cooled. When the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), heat exchange can be performed with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat; when the coolant flows through the heater core (12) in the heater core circuit (900), air can be heated to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the engine assembly (27) in the engine circuit (1000), heat exchange is performed, so that the coolant flowing through the engine assembly (27) absorbs heat; The sixth combined circuit thermal management method further comprises: connecting the water inlet end and the water outlet end of the battery circuit (500), and connecting the water inlet end of the first heat exchange coolant circuit (700) and the water outlet end of the warm air core circuit (900); The seventh combined circuit thermal management method comprises: connecting the water inlet end of the first heat exchange coolant circuit (700) with the water outlet end of the warm air core circuit (900) through the multi-way valve (19); when the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), heat exchange can be performed with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat, and when the coolant flows through the warm air core (12) in the warm air core circuit (900), the air can be heated to achieve dehumidification or heating of the passenger compartment; The eighth combined circuit thermal management method comprises: connecting the water inlet end of the first heat exchange coolant circuit (700) with the water outlet end of the heater 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 heater core circuit (900); when the coolant flows through the first heat exchanger (2) in the first heat exchange coolant circuit (700), it can exchange heat with the refrigerant in the first heat exchanger (2), so that the coolant passing through the first heat exchanger (2) absorbs heat; when the coolant flows through the heater core (12) in the heater core circuit (900), it can heat the air to achieve dehumidification or heating of the passenger compartment; when the coolant flows through the engine assembly (27) in the engine circuit (1000), it can exchange heat with the coolant flowing through the engine assembly (27) to absorb heat; The ninth combined circuit thermal management method comprises: connecting the water outlet of the electric drive circuit (300) to the water inlet of the second heat exchange coolant circuit (800) through a multi-way valve (19), and connecting the water outlet of the second heat exchange coolant circuit (800) to the water inlet of the coupling circuit (600); when the coolant flows through the electric drive circuit (300), the electric drive assembly (17) can be cooled; when the coolant flows through the coupling circuit (600), the coolant can be introduced into the electric drive circuit (300) through the coupling circuit (600); when the coolant flows through the second heat exchange coolant circuit (800), heat exchange can be performed with the refrigerant in the second heat exchanger (3), so that the coolant flowing through the second heat exchanger (3) releases heat.

10. The thermal management method based on the heat pump type thermal management system of electric vehicles according to claim 6, characterized in that: The single-circuit refrigerant thermal management method comprises: opening a valve between the first heat exchanger (2) and the evaporator (13), closing a valve between the first heat exchanger (2) and the second heat exchanger (3), or closing a valve between the first heat exchanger (2) and the evaporator (13), and opening a 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 connected to the evaporator (13) or the second heat exchanger (3); The combined circuit refrigerant thermal management method comprises: opening a valve between the first heat exchanger (2) and the evaporator (13) and a 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 connected to the evaporator (13) and the second heat exchanger (3) at the same time.

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