Indirect heat pump system and vehicle-mounted air conditioner

Abstract

The utility model belongs to the technical field of heat pump air conditioners, and discloses an indirect heat pump system and a vehicle-mounted air conditioner. The indirect heat pump system includes a coolant loop and a refrigerant loop. The cooling liquid loop comprises a condenser, a motor heat exchanger, a radiator, an evaporator, a cold core, a warm core, a battery heat exchanger, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a first four-way valve, a second four-way valve, a first water pump, a second water pump and a third water pump. Through the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve, connection and disconnection between the condenser and the evaporator and the motor heat exchanger, the radiator, the cold core, the warm core and the battery heat exchanger can be controlled. The refrigerant loop exchanges heat with the cooling liquid loop through the condenser and the evaporator. The indirect type heat pump system is simple in structure, high in integration level, small in occupied space, multiple in working mode and capable of meeting various use requirements of users.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump air conditioners, in particular to an indirect heat pump system and a vehicle-mounted air conditioner. Background Art

[0002] As the thermal management system of new energy vehicles develops towards integration and standardization, as well as the use of new refrigerants such as flammable and toxic refrigerants, indirect heat pump systems are gradually being used in thermal management systems of new energy vehicles.

[0003] However, due to the different cooling and heating requirements of various onboard electronic devices such as batteries, motors, and electronic controls in new energy vehicles, as well as various loads such as the passenger compartment, the structure of the indirect heat pump system is extremely complex and occupies a large space, making the front cabin layout of the vehicle more congested. In addition, the switching between the various working modes of the indirect heat pump system is relatively complicated.

[0004] Therefore, it is urgent to propose an indirect heat pump system and a vehicle air conditioner to solve the above technical problems. Utility Model Content

[0005] According to one aspect of the utility model, the utility model provides an indirect heat pump system, which has a simple structure, high integration, small space occupation, and multiple working modes, and can meet various usage needs of users.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Indirect heat pump system, including:

[0008] A coolant circuit, including a condenser, a motor heat exchanger, a radiator, an evaporator, a cold core, a warm core, a battery heat exchanger, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a first four-way valve, a second four-way valve, a first water pump, a second water pump and a third water pump;

[0009] The first outlet of the condenser is communicated with the first interface of the second three-way valve, the second interface of the second three-way valve is communicated with the inlet of the heater core, the outlet of the heater core is communicated with the inlet of the second water pump, and the outlet of the second water pump is communicated with the first inlet of the condenser;

[0010] The third interface of the second three-way valve is communicated with the first interface of the first four-way valve, the third interface of the first four-way valve is communicated with the first interface of the first three-way valve, the second interface of the first three-way valve is communicated with the inlet of the battery heat exchanger, the outlet of the battery heat exchanger is communicated with the inlet of the first water pump, the outlet of the first water pump is communicated with the third interface of the first three-way valve and the second interface of the second four-way valve respectively, and the third interface of the second four-way valve is communicated with the inlet of the second water pump;

[0011] The fourth interface of the second four-way valve is communicated with the inlet of the third water pump, the outlet of the third water pump is communicated with the first inlet of the evaporator, the first outlet of the evaporator is communicated with the first interface of the fourth three-way valve, the second interface of the fourth three-way valve is communicated with the inlet of the cold core, the outlet of the cold core is communicated with the second interface of the second four-way valve, the third interface of the fourth three-way valve is communicated with the second interface of the first four-way valve, and the fourth interface of the first four-way valve is communicated with the third interface of the third three-way valve;

[0012] The first interface of the third three-way valve is communicated with the inlet of the motor heat exchanger, the outlet of the motor heat exchanger is communicated with the first interface of the second four-way valve, the second interface of the third three-way valve is communicated with the inlet of the radiator, and the outlet of the radiator is communicated with the inlet of the motor heat exchanger;

[0013] The refrigerant circuit exchanges heat with the coolant circuit through the condenser and the evaporator.

[0014] Optionally, when the indirect heat pump system is in a single passenger compartment cooling mode, the battery heat exchanger, the warm core, the first water pump and the first three-way valve are turned off, and the condenser, the motor heat exchanger, the radiator, the evaporator, the cold core, the second water pump, the third water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0015] The first interface and the third interface of the second three-way valve are connected, the first interface and the fourth interface of the first four-way valve are connected, the third interface and the second interface of the third three-way valve are connected, the first interface and the third interface of the second four-way valve are connected, the second interface and the fourth interface of the second four-way valve are connected, and the first interface and the second interface of the fourth three-way valve are connected.

[0016] Optionally, when the indirect heat pump system is in a single battery cooling mode, the warm core and the cold core are turned off, and the battery heat exchanger, the condenser, the motor heat exchanger, the radiator, the evaporator, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0017] The first interface and the third interface of the second three-way valve are connected, the first interface and the fourth interface of the first four-way valve are connected, the third interface and the second interface of the third three-way valve are connected, the first interface and the third interface of the second four-way valve are connected, the first interface and the third interface of the fourth three-way valve are connected, the second interface and the third interface of the first four-way valve are connected, the first interface and the second interface of the first three-way valve are connected, and the second interface and the fourth interface of the second four-way valve are connected.

[0018] Optionally, when the indirect heat pump system is in the passenger compartment and battery dual cooling mode, the warm core is turned off, and the battery heat exchanger, the condenser, the motor heat exchanger, the radiator, the evaporator, the cold core, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0019] The first interface and the third interface of the second three-way valve are connected, the first interface and the fourth interface of the first four-way valve are connected, the third interface and the second interface of the third three-way valve are connected, the first interface and the third interface of the second four-way valve are connected, the first interface of the fourth three-way valve is connected with the second interface and the third interface respectively, the second interface and the third interface of the first four-way valve are connected, the first interface and the second interface of the first three-way valve are connected, and the second interface and the fourth interface of the second four-way valve are connected.

[0020] Optionally, when the indirect heat pump system is in a dual heating mode of the passenger compartment and the battery, the cold core is turned off, and the battery heat exchanger, the condenser, the motor heat exchanger, the radiator, the evaporator, the warm core, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0021] The first interface of the second three-way valve is connected to the second interface and the third interface respectively, the first interface and the third interface of the first four-way valve are connected, the first interface and the second interface of the first three-way valve are connected, the second interface and the third interface of the second four-way valve are connected, the first interface and the third interface of the fourth three-way valve are connected, the second interface and the fourth interface of the first four-way valve are connected, the third interface and the second interface of the third three-way valve are connected, and the first interface and the fourth interface of the second four-way valve are connected.

[0022] Optionally, when the indirect heat pump system is in the motor waste heat recovery heating mode, the radiator and the cold core are turned off, and the battery heat exchanger, the condenser, the motor heat exchanger, the evaporator, the warm core, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0023] The first interface of the second three-way valve is connected to the second interface and the third interface respectively, the first interface and the third interface of the first four-way valve are connected, the first interface and the second interface of the first three-way valve are connected, the second interface and the third interface of the second four-way valve are connected, the first interface and the third interface of the fourth three-way valve are connected, the second interface and the fourth interface of the first four-way valve are connected, the third interface of the third three-way valve is connected to the first interface, and the first interface and the fourth interface of the second four-way valve are connected.

[0024] Optionally, when the indirect heat pump system is in the battery waste heat recovery heating mode, the motor heat exchanger, the radiator, the cold core and the third three-way valve are turned off, and the battery heat exchanger, the condenser, the evaporator, the warm core, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0025] The first interface and the second interface of the second three-way valve are connected, the first interface and the third interface of the fourth three-way valve are connected, the second interface and the third interface of the first four-way valve are connected, the first interface and the second interface of the first three-way valve are connected, and the second interface and the fourth interface of the second four-way valve are connected.

[0026] Optionally, when the indirect heat pump system is in dehumidification mode, the motor heat exchanger, the radiator and the third three-way valve are turned off, and the battery heat exchanger, the condenser, the evaporator, the cold core, the warm core, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0027] The first interface of the second three-way valve is connected to the second interface, the first interface of the fourth three-way valve is connected to the second interface and the third interface respectively, the second interface of the first four-way valve is connected to the third interface, the first interface and the second interface of the first three-way valve are connected, and the second interface of the second four-way valve is connected to the fourth interface.

[0028] Optionally, when the indirect heat pump system is in the radiator defrosting mode, the warm core and the cold core are turned off, and the battery heat exchanger, the condenser, the motor heat exchanger, the radiator, the evaporator, the first water pump, the second water pump, the third water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve are started;

[0029] The first interface of the second three-way valve is communicated with the third interface, the first interface of the first four-way valve is communicated with the fourth interface, the third interface of the third three-way valve is communicated with the second interface, the first interface of the second four-way valve is communicated with the third interface, the first interface of the fourth three-way valve is communicated with the third interface, the second interface of the first four-way valve is communicated with the third interface, the first interface of the first three-way valve is communicated with the second interface, and the second interface of the second four-way valve is communicated with the fourth interface.

[0030] The utility model also provides a vehicle-mounted air conditioner, comprising an air conditioner body and an indirect heat pump system as described in any of the above technical solutions, wherein the indirect heat pump system is arranged in the air conditioner body.

[0031] Beneficial effects of the utility model:

[0032] The utility model provides an indirect heat pump system, including a coolant circuit and a refrigerant circuit. The coolant circuit includes a condenser, a motor heat exchanger, a radiator, an evaporator, a cold core, a warm core, a battery heat exchanger, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a first four-way valve, a second four-way valve, a first water pump, a second water pump and a third water pump. The indirect heat pump system can control the connection and disconnection between the condenser and the evaporator and the motor heat exchanger, the radiator, the cold core, the warm core and the battery heat exchanger through the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first four-way valve and the second four-way valve, so as to realize the switching of various working modes of the indirect heat pump system. There are many working modes, which can meet the various usage needs of users. In addition, the structure is simple, the space occupied is small, and the switching control between various working modes is also relatively simple.

[0033] The utility model also provides a vehicle air conditioner, comprising an air conditioner body and the above-mentioned indirect heat pump system. Due to the adoption of the above-mentioned indirect heat pump system, the vehicle air conditioner occupies less space in the front cabin of the vehicle, thereby improving the space utilization rate of the entire vehicle, and has multiple functions, thereby improving user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model;

[0036] Figure 2 is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model in a single passenger cabin cooling mode;

[0037] Figure 3 It is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in a single battery cooling mode;

[0038] Figure 4 is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model in a dual cooling mode for a passenger compartment and a battery;

[0039] Figure 5 It is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in a passenger compartment and battery dual heating mode;

[0040] Figure 6 It is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in the motor waste heat recovery heating mode;

[0041] Figure 7 It is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in a battery waste heat recovery heating mode;

[0042] Figure 8 is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model in a dehumidification mode;

[0043] Fig. 9 It is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model when it is in the radiator defrosting mode.

[0044] In the figure:

[0045] 11. Condenser; 12. Motor heat exchanger; 13. Radiator; 14. Evaporator; 15. Cold core; 16. Warm core; 17. Battery heat exchanger;

[0046] 21. First water pump; 22. Second water pump; 23. Third water pump;

[0047] 31. First three-way valve; 32. Second three-way valve; 33. Third three-way valve; 34. Fourth three-way valve;

[0048] 41. First four-way valve; 42. Second four-way valve. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0050] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0053] The present embodiment provides an indirect heat pump system, which has a simple structure, high integration, small space occupation, and multiple working modes, and can meet various usage requirements of users.

[0054] Specifically, Figure 1As shown, the indirect heat pump system includes a cooling liquid circuit and a refrigerant circuit. Cooling liquid circulates in the cooling liquid circuit, and refrigerant circulates in the refrigerant circuit.

[0055] The coolant circuit includes a condenser 11, a motor heat exchanger 12, a radiator 13, an evaporator 14, a cold core 15, a warm core 16, a battery heat exchanger 17, a first three-way valve 31, a second three-way valve 32, a third three-way valve 33, a fourth three-way valve 34, a first four-way valve 41, a second four-way valve 42, a first water pump 21, a second water pump 22 and a third water pump 23. Among them, the first outlet of the condenser 11 is communicated with the first interface a of the second three-way valve 32, the second interface b of the second three-way valve 32 is communicated with the inlet of the warm core 16, the outlet of the warm core 16 is communicated with the inlet of the second water pump 22, the outlet of the second water pump 22 is communicated with the first inlet of the condenser 11, the third interface c of the second three-way valve 32 is communicated with the first interface a of the first four-way valve 41, the third interface c of the first four-way valve 41 is communicated with the first interface a of the first three-way valve 31, the second interface b of the first three-way valve 31 is communicated with the inlet of the battery heat exchanger 17, the outlet of the battery heat exchanger 17 is communicated with the inlet of the first water pump 21, the outlet of the first water pump 21 is respectively communicated with the third interface c of the first three-way valve 31 and the second interface b of the second four-way valve 42, the third interface c of the second four-way valve 42 is communicated with the inlet of the second water pump 22, and the second four-way valve The fourth interface d of 42 is communicated with the inlet of the third water pump 23, the outlet of the third water pump 23 is communicated with the first inlet of the evaporator 14, the first outlet of the evaporator 14 is communicated with the first interface a of the fourth three-way valve 34, the second interface b of the fourth three-way valve 34 is communicated with the inlet of the cold core 15, the outlet of the cold core 15 is communicated with the second interface b of the second four-way valve 42, the third interface c of the fourth three-way valve 34 is communicated with the second interface b of the first four-way valve 41, the fourth interface d of the first four-way valve 41 is communicated with the third interface c of the third three-way valve 33, the first interface a of the third three-way valve 33 is communicated with the inlet of the motor heat exchanger 12, the outlet of the motor heat exchanger 12 is communicated with the first interface a of the second four-way valve 42, the second interface b of the third three-way valve 33 is communicated with the inlet of the radiator 13, and the outlet of the radiator 13 is communicated with the inlet of the motor heat exchanger 12.

[0056] The refrigerant circuit also includes a condenser 11 and an evaporator 14 , that is, the refrigerant circuit and the cooling liquid circuit share the condenser 11 and the evaporator 14 , and the refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser 11 and the evaporator 14 .

[0057] Optionally, in a possible embodiment, the refrigerant circuit includes a compressor, an evaporator 14 and a condenser 11. The outlet of the compressor is communicated with the second inlet of the evaporator 14, the second outlet of the evaporator 14 is communicated with the second inlet of the condenser 11, and the second outlet of the condenser 11 is communicated with the inlet of the compressor.

[0058] Optionally, continue to see Figure 1 In this embodiment, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41, the second four-way valve 42, the first water pump 21, the second water pump 22 and the third water pump 23 are arranged in the middle of the indirect heat pump system, and the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the cold core 15, the warm core 16 and the battery heat exchanger 17 are arranged around the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41, the second four-way valve 42, the first water pump 21, the second water pump 22 and the third water pump 23 in sequence. Such an arrangement can improve the structural compactness of the indirect heat pump system.

[0059] The indirect heat pump system can switch between eight working modes according to different usage requirements by controlling the on-off conditions of the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41, and the second four-way valve 42. The system has many working modes and can meet various usage requirements of users. In addition, the system has a simple structure, occupies a small space, and the switching control between the various working modes is also relatively simple.

[0060] The eight working modes are single passenger compartment cooling mode, single battery cooling mode, passenger compartment and battery dual cooling mode, passenger compartment and battery dual heating mode, motor waste heat recovery heating mode, battery waste heat recovery heating mode, dehumidification mode and radiator defrost mode.

[0061] Figure 2 This is a schematic diagram of an indirect heat pump system in a single passenger compartment cooling mode. At this time, the battery heat exchanger 17, the heating core 16, the first water pump 21 and the first three-way valve 31 are turned off, and the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the cooling core 15, the second water pump 22, the third water pump 23, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. In addition, the first interface a and the third interface c of the second three-way valve 32 are connected, the first interface a and the fourth interface d of the first four-way valve 41 are connected, the third interface c and the second interface b of the third three-way valve 33 are connected, the first interface a and the third interface c of the second four-way valve 42 are connected, the second interface b and the fourth interface d of the second four-way valve 42 are connected, and the first interface a and the second interface b of the fourth three-way valve 34 are connected.

[0062] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0063] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0064] Coolant circuit: includes heat dissipation circuit and cabin cooling circuit.

[0065] In the heat dissipation circuit, the temperature of the coolant increases after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out of the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33, and the second interface b of the third three-way valve 33, and then enters the radiator 13 for heat dissipation. The coolant cooled by the radiator 13 enters the motor heat exchanger 12 to cool the motor. The heated coolant passes through the first interface a of the second four-way valve 42 and the third interface c of the second four-way valve 42 and enters the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0066] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 14 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34 and the second interface b of the fourth three-way valve 34 in turn into the cold core 15. The low-temperature coolant in the cold core 15 exchanges heat with the passenger compartment. The heated coolant passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 in turn into the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23.

[0067] Figure 3 This is a schematic diagram of an indirect heat pump system in a single battery cooling mode. At this time, the warm core 16 and the cold core 15 are turned off, and the battery heat exchanger 17, the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a and the third interface c of the second three-way valve 32 are connected, the first interface a and the fourth interface d of the first four-way valve 41 are connected, the third interface c and the second interface b of the third three-way valve 33 are connected, the first interface a and the third interface c of the second four-way valve 42 are connected, the first interface a and the third interface c of the fourth three-way valve 34 are connected, the second interface b and the third interface c of the first four-way valve 41 are connected, the first interface a and the second interface b of the first three-way valve 31 are connected, and the second interface b and the fourth interface d of the second four-way valve 42 are connected.

[0068] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0069] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0070] Coolant circuit: includes heat dissipation circuit and battery cooling circuit.

[0071] In the heat dissipation circuit, the temperature of the coolant increases after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out of the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33, and the second interface b of the third three-way valve 33, and then enters the radiator 13 for heat dissipation. The coolant cooled by the radiator 13 enters the motor heat exchanger 12 to cool the motor. The heated coolant passes through the first interface a of the second four-way valve 42 and the third interface c of the second four-way valve 42 and enters the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0072] In the battery refrigeration circuit, the temperature of the coolant is lowered by the heat absorbed by the refrigerant in the evaporator 14. The low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31, and the second interface b of the first three-way valve 31 to enter the battery heat exchanger 17. The coolant in the battery heat exchanger 17 absorbs the heat of the battery to cool the battery. The coolant that has heated up after absorbing heat passes through the first water pump 21, the second interface b of the second four-way valve 42, and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the input of the third water pump 23.

[0073] Figure 4This is a schematic diagram of the indirect heat pump system in the dual cooling mode of the passenger compartment and the battery. At this time, the warm core 16 is turned off, and the battery heat exchanger 17, the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the cold core 15, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a and the third interface c of the second three-way valve 32 are connected, the first interface a and the fourth interface d of the first four-way valve 41 are connected, the third interface c and the second interface b of the third three-way valve 33 are connected, the first interface a and the third interface c of the second four-way valve 42 are connected, the first interface a of the fourth three-way valve 34 is connected with the second interface b and the third interface c respectively, the second interface b and the third interface c of the first four-way valve 41 are connected, the first interface a and the second interface b of the first three-way valve 31 are connected, and the second interface b and the fourth interface d of the second four-way valve 42 are connected.

[0074] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0075] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0076] Coolant circuit: includes heat dissipation circuit, battery cooling circuit and cabin cooling circuit.

[0077] In the heat dissipation circuit, the temperature of the coolant increases after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out of the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33, and the second interface b of the third three-way valve 33, and then enters the radiator 13 for heat dissipation. The coolant cooled by the radiator 13 enters the motor heat exchanger 12 to cool the motor. The heated coolant passes through the first interface a of the second four-way valve 42 and the third interface c of the second four-way valve 42 and enters the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0078] In the battery refrigeration circuit, the temperature of the coolant is lowered by the heat absorbed by the refrigerant in the evaporator 14. The low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31, and the second interface b of the first three-way valve 31 to enter the battery heat exchanger 17. The coolant in the battery heat exchanger 17 absorbs the heat of the battery to cool the battery. The coolant that has heated up after absorbing heat passes through the first water pump 21, the second interface b of the second four-way valve 42, and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the input of the third water pump 23.

[0079] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 14 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34 and the second interface b of the fourth three-way valve 34 in turn into the cold core 15. The low-temperature coolant in the cold core 15 exchanges heat with the passenger compartment. The heated coolant passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 in turn into the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23.

[0080] That is, in the dual cooling mode of the passenger compartment and the battery, the low-temperature coolant flowing out from the first outlet of the evaporator 14 is divided into two branches in the fourth three-way valve 34, one branch flows through the cold core 15 and then returns to the evaporator 14 to achieve cooling of the passenger compartment, and the other branch flows through the battery radiator 13 and then returns to the evaporator 14 to achieve cooling of the battery.

[0081] Figure 5 This is a schematic diagram of the indirect heat pump system in the dual heating mode of the passenger compartment and the battery. At this time, the cold core 15 is turned off, and the battery heat exchanger 17, the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the warm core 16, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a of the second three-way valve 32 is connected to the second interface b and the third interface c respectively, the first interface a of the first four-way valve 41 is connected to the third interface c, the first interface a and the second interface b of the first three-way valve 31 are connected, the second interface b and the third interface c of the second four-way valve 42 are connected, the first interface a and the third interface c of the fourth three-way valve 34 are connected, the second interface b and the fourth interface d of the first four-way valve 41 are connected, the third interface c and the second interface b of the third three-way valve 33 are connected, and the first interface a and the fourth interface d of the second four-way valve 42 are connected.

[0082] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0083] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0084] Coolant circuit: includes cabin heating circuit, battery heating circuit and air source heat pump circuit.

[0085] In the cabin heating circuit, the temperature of the coolant rises after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32 and the second interface b of the second three-way valve 32 in sequence and enters the heater core 16. The high-temperature coolant in the heater core 16 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 16 enters the second water pump 22 and returns to the condenser 11 under the transportation of the second water pump 22.

[0086] In the battery heating circuit, the temperature of the coolant increases after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31 and the second interface b of the first three-way valve 31 in sequence and enters the battery heat exchanger 17. In the battery heat exchanger 17, the high-temperature coolant exchanges heat with the battery to heat the battery and heat the battery. The low-temperature coolant after heat exchange enters the first water pump 21, and under the transportation of the first water pump 21, it passes through the second interface b of the second four-way valve 42 and the third interface c of the second four-way valve 42 in sequence and enters the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22.

[0087] That is, in the dual heating mode of the passenger compartment and the battery, the high-temperature coolant flowing out from the first outlet of the condenser 11 is divided into two branches in the second three-way valve 32, one branch flows through the heater core 16 and then returns to the condenser 11, thereby heating the passenger compartment, and the other branch flows through the battery radiator 13 and then returns to the condenser 11, thereby heating the battery.

[0088] In the air source heat pump circuit, the coolant is cooled by the heat absorbed by the refrigerant in the evaporator 14, and the low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33, and the second interface b of the third three-way valve 33 to enter the radiator 13 to recover the heat of the radiator 13, and then enter the motor heat exchanger 12 to recover the waste heat of the motor, and then pass through the first interface a of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and return to the evaporator 14 under the transportation of the third water pump 23. In the air source heat pump circuit, the low-temperature coolant absorbs the heat in the air in the radiator 13 and absorbs the heat of the motor in the motor heat exchanger 12, which can not only cool the motor but also improve the energy utilization efficiency.

[0089] Figure 6 This is a schematic diagram of the indirect heat pump system in the motor waste heat recovery heating mode. At this time, the radiator 13 and the cold core 15 are turned off, and the battery heat exchanger 17, the condenser 11, the motor heat exchanger 12, the evaporator 14, the warm core 16, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a of the second three-way valve 32 is connected to the second interface b and the third interface c respectively, the first interface a of the first four-way valve 41 is connected to the third interface c, the first interface a and the second interface b of the first three-way valve 31 are connected, the second interface b and the third interface c of the second four-way valve 42 are connected, the first interface a and the third interface c of the fourth three-way valve 34 are connected, the second interface b and the fourth interface d of the first four-way valve 41 are connected, the third interface c of the third three-way valve 33 is connected to the first interface a, and the first interface a and the fourth interface d of the second four-way valve 42 are connected.

[0090] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0091] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0092] Coolant circuit: includes cabin heating circuit, battery heating circuit and motor waste heat recovery circuit.

[0093] In the cabin heating circuit, the temperature of the coolant rises after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32 and the second interface b of the second three-way valve 32 in sequence and enters the heater core 16. The high-temperature coolant in the heater core 16 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 16 enters the second water pump 22 and returns to the condenser 11 under the transportation of the second water pump 22.

[0094] In the battery heating circuit, the temperature of the coolant increases after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31 and the second interface b of the first three-way valve 31 in sequence and enters the battery heat exchanger 17. In the battery heat exchanger 17, the high-temperature coolant exchanges heat with the battery to heat the battery and heat the battery. The low-temperature coolant after heat exchange enters the first water pump 21, and under the transportation of the first water pump 21, it passes through the second interface b of the second four-way valve 42 and the third interface c of the second four-way valve 42 in sequence and enters the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22.

[0095] That is, in the dual heating mode of the passenger compartment and the battery, the high-temperature coolant flowing out from the first outlet of the condenser 11 is divided into two branches in the second three-way valve 32, one branch flows through the heater core 16 and then returns to the condenser 11, thereby heating the passenger compartment, and the other branch flows through the battery radiator 13 and then returns to the condenser 11, thereby heating the battery.

[0096] In the motor waste heat recovery circuit, the coolant in the evaporator 14 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33, and the first interface a of the third three-way valve 33 to enter the motor heat exchanger 12 to recover the waste heat of the motor, and then passes through the first interface a of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23. In the motor waste heat recovery circuit, the waste heat of the motor can be recovered, which can not only cool the motor, but also improve the energy utilization efficiency.

[0097] Figure 7This is a schematic diagram of an indirect heat pump system in a battery waste heat recovery heating mode. At this time, the motor heat exchanger 12, the radiator 13, the cold core 15 and the third three-way valve 33 are closed, and the battery heat exchanger 17, the condenser 11, the evaporator 14, the warm core 16, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a and the second interface b of the second three-way valve 32 are connected, the first interface a and the third interface c of the fourth three-way valve 34 are connected, the second interface b and the third interface c of the first four-way valve 41 are connected, the first interface a and the second interface b of the first three-way valve 31 are connected, and the second interface b and the fourth interface d of the second four-way valve 42 are connected.

[0098] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0099] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0100] Coolant circuit: includes cabin heating circuit and battery waste heat recovery circuit.

[0101] In the cabin heating circuit, the temperature of the coolant rises after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32 and the second interface b of the second three-way valve 32 in sequence and enters the heater core 16. The high-temperature coolant in the heater core 16 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 16 enters the second water pump 22 and returns to the condenser 11 under the transportation of the second water pump 22.

[0102] In the battery waste heat recovery circuit, the coolant in the evaporator 14 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31, and the second interface b of the first three-way valve 31 to enter the battery heat exchanger 17 to recover the waste heat of the battery, and then enters the first water pump 21. Under the transportation of the first water pump 21, it passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23. In the battery waste heat recovery circuit, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0103] Figure 8This is a schematic diagram of an indirect heat pump system in a dehumidification mode. At this time, the motor heat exchanger 12, the radiator 13 and the third three-way valve 33 are turned off, and the battery heat exchanger 17, the condenser 11, the evaporator 14, the cold core 15, the warm core 16, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a of the second three-way valve 32 is connected to the second interface b, the first interface a of the fourth three-way valve 34 is connected to the second interface b and the third interface c respectively, the second interface b of the first four-way valve 41 is connected to the third interface c, the first interface a of the first three-way valve 31 is connected to the second interface b, and the second interface b of the second four-way valve 42 is connected to the fourth interface d.

[0104] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0105] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0106] Coolant circuit: includes cabin heating circuit, cabin cooling circuit and battery waste heat recovery circuit.

[0107] In the cabin heating circuit, the temperature of the coolant rises after absorbing the heat of the refrigerant in the condenser 11. The high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32 and the second interface b of the second three-way valve 32 in sequence and enters the heater core 16. The high-temperature coolant in the heater core 16 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 16 enters the second water pump 22 and returns to the condenser 11 under the transportation of the second water pump 22.

[0108] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 14 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34 and the second interface b of the fourth three-way valve 34 in turn into the cold core 15. The low-temperature coolant in the cold core 15 exchanges heat with the passenger compartment. The heated coolant passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 in turn into the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23.

[0109] That is, when the cold core 15 and the warm core 16 simultaneously exchange heat with the passenger compartment, the passenger compartment is dehumidified.

[0110] In the battery waste heat recovery circuit, the coolant in the evaporator 14 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 14 passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31, and the second interface b of the first three-way valve 31 to enter the battery heat exchanger 17 to recover the waste heat of the battery, and then enters the first water pump 21. Under the transportation of the first water pump 21, it passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23. In the battery waste heat recovery circuit, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0111] Fig. 9 It is a schematic diagram of the indirect heat pump system in the radiator defrost mode. At this time, the warm core 16 and the cold core 15 are turned off, and the battery heat exchanger 17, the condenser 11, the motor heat exchanger 12, the radiator 13, the evaporator 14, the first water pump 21, the second water pump 22, the third water pump 23, the first three-way valve 31, the second three-way valve 32, the third three-way valve 33, the fourth three-way valve 34, the first four-way valve 41 and the second four-way valve 42 are started. The first interface a of the second three-way valve 32 is connected to the third interface c, the first interface a of the first four-way valve 41 is connected to the fourth interface d, the third interface c of the third three-way valve 33 is connected to the second interface b, the first interface a of the second four-way valve 42 is connected to the third interface c, the first interface a of the fourth three-way valve 34 is connected to the third interface c, the second interface b of the first four-way valve 41 is connected to the third interface c, the first interface a and the second interface b of the first three-way valve 31 are connected, and the second interface b of the second four-way valve 42 is connected to the fourth interface d.

[0112] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0113] Refrigerant circuit: The refrigerant releases heat to the coolant at the condenser 11, causing the coolant temperature to rise, and the refrigerant absorbs heat from the coolant at the evaporator 14, causing the coolant to cool down.

[0114] Coolant circuit: includes radiator defrosting circuit and battery waste heat recovery circuit.

[0115] In the radiator defrosting circuit, the temperature of the coolant rises after absorbing the heat of the refrigerant in the condenser 11, and the high-temperature coolant flowing out from the first outlet of the condenser 11 passes through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the first interface a of the first four-way valve 41, the fourth interface d of the first four-way valve 41, the third interface c of the third three-way valve 33 and the second interface b of the third three-way valve 33 to enter the radiator 13, and the high-temperature coolant heats the radiator 13 to defrost the radiator 13. The coolant that has been cooled after heat exchange with the radiator 13 enters the motor heat exchanger 12 to recover the heat of the motor, and then passes through the first interface a of the second four-way valve 42 and the third interface c of the second four-way valve 42 to enter the second water pump 22, and returns to the condenser 11 under the transportation of the second water pump 22.

[0116] In the battery waste heat recovery circuit, the coolant in the evaporator 14 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 14 sequentially passes through the first interface a of the fourth three-way valve 34, the third interface c of the fourth three-way valve 34, the second interface b of the first four-way valve 41, the third interface c of the first four-way valve 41, the first interface a of the first three-way valve 31, and the second interface b of the first three-way valve 31 to enter the battery heat exchanger 17 to recover the waste heat of the battery, and then enters the first water pump 21. Under the transportation of the first water pump 21, it sequentially passes through the second interface b of the second four-way valve 42 and the fourth interface d of the second four-way valve 42 to enter the third water pump 23, and returns to the evaporator 14 under the transportation of the third water pump 23. In the battery waste heat recovery circuit, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0117] This embodiment also provides a vehicle air conditioner, including an air conditioner body and the above-mentioned indirect heat pump system, and the indirect heat pump system is arranged in the air conditioner body.

[0118] Since the vehicle air conditioner adopts the above-mentioned indirect heat pump system, it occupies less space in the front cabin of the vehicle, thereby improving the space utilization rate of the entire vehicle, and has various functions, thereby improving user satisfaction.

[0119] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An indirect heat pump system, characterized in that: include: A coolant circuit, comprising a condenser (11), a motor heat exchanger (12), a radiator (13), an evaporator (14), a cold core (15), a warm core (16), a battery heat exchanger (17), a first three-way valve (31), a second three-way valve (32), a third three-way valve (33), a fourth three-way valve (34), a first four-way valve (41), a second four-way valve (42), a first water pump (21), a second water pump (22) and a third water pump (23); The first outlet of the condenser (11) is communicated with the first interface of the second three-way valve (32), the second interface of the second three-way valve (32) is communicated with the inlet of the heater core (16), the outlet of the heater core (16) is communicated with the inlet of the second water pump (22), and the outlet of the second water pump (22) is communicated with the first inlet of the condenser (11); The third interface of the second three-way valve (32) is communicated with the first interface of the first four-way valve (41), the third interface of the first four-way valve (41) is communicated with the first interface of the first three-way valve (31), the second interface of the first three-way valve (31) is communicated with the inlet of the battery heat exchanger (17), the outlet of the battery heat exchanger (17) is communicated with the inlet of the first water pump (21), the outlet of the first water pump (21) is communicated with the third interface of the first three-way valve (31) and the second interface of the second four-way valve (42) respectively, and the third interface of the second four-way valve (42) is communicated with the inlet of the second water pump (22); The fourth interface of the second four-way valve (42) is communicated with the inlet of the third water pump (23), the outlet of the third water pump (23) is communicated with the first inlet of the evaporator (14), the first outlet of the evaporator (14) is communicated with the first interface of the fourth three-way valve (34), the second interface of the fourth three-way valve (34) is communicated with the inlet of the cold core (15), the outlet of the cold core (15) is communicated with the second interface of the second four-way valve (42), the third interface of the fourth three-way valve (34) is communicated with the second interface of the first four-way valve (41), and the fourth interface of the first four-way valve (41) is communicated with the third interface of the third three-way valve (33); The first interface of the third three-way valve (33) is communicated with the inlet of the motor heat exchanger (12), the outlet of the motor heat exchanger (12) is communicated with the first interface of the second four-way valve (42), the second interface of the third three-way valve (33) is communicated with the inlet of the radiator (13), and the outlet of the radiator (13) is communicated with the inlet of the motor heat exchanger (12); The refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser (11) and the evaporator (14).

2. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a single passenger cabin cooling mode, the battery heat exchanger (17), the heater core (16), the first water pump (21) and the first three-way valve (31) are turned off, and the condenser (11), the motor heat exchanger (12), the radiator (13), the evaporator (14), the cooling core (15), the second water pump (22), the third water pump (23), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface and the third interface of the second three-way valve (32) are connected, the first interface and the fourth interface of the first four-way valve (41) are connected, the third interface and the second interface of the third three-way valve (33) are connected, the first interface and the third interface of the second four-way valve (42) are connected, the second interface and the fourth interface of the second four-way valve (42) are connected, and the first interface and the second interface of the fourth three-way valve (34) are connected.

3. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a single battery cooling mode, the warm core (16) and the cold core (15) are turned off, and the battery heat exchanger (17), the condenser (11), the motor heat exchanger (12), the radiator (13), the evaporator (14), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface and the third interface of the second three-way valve (32) are connected, the first interface and the fourth interface of the first four-way valve (41) are connected, the third interface and the second interface of the third three-way valve (33) are connected, the first interface and the third interface of the second four-way valve (42) are connected, the first interface and the third interface of the fourth three-way valve (34) are connected, the second interface and the third interface of the first four-way valve (41) are connected, the first interface and the second interface of the first three-way valve (31) are connected, and the second interface and the fourth interface of the second four-way valve (42) are connected.

4. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a passenger compartment and battery dual cooling mode, the warm core (16) is turned off, and the battery heat exchanger (17), the condenser (11), the motor heat exchanger (12), the radiator (13), the evaporator (14), the cold core (15), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface and the third interface of the second three-way valve (32) are in conduction, the first interface and the fourth interface of the first four-way valve (41) are in conduction, the third interface and the second interface of the third three-way valve (33) are in conduction, the first interface and the third interface of the second four-way valve (42) are in conduction, the first interface of the fourth three-way valve (34) is in conduction with the second interface and the third interface respectively, the second interface and the third interface of the first four-way valve (41) are in conduction, the first interface and the second interface of the first three-way valve (31) are in conduction, and the second interface and the fourth interface of the second four-way valve (42) are in conduction.

5. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a passenger compartment and battery dual heating mode, the cold core (15) is turned off, and the battery heat exchanger (17), the condenser (11), the motor heat exchanger (12), the radiator (13), the evaporator (14), the warm core (16), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface of the second three-way valve (32) is communicated with the second interface and the third interface respectively, the first interface of the first four-way valve (41) is communicated with the third interface, the first interface of the first three-way valve (31) is communicated with the second interface, the second interface of the second four-way valve (42) is communicated with the third interface, the first interface of the fourth three-way valve (34) is communicated with the third interface, the second interface of the first four-way valve (41) is communicated with the fourth interface, the third interface of the third three-way valve (33) is communicated with the second interface, and the first interface of the second four-way valve (42) is communicated with the fourth interface.

6. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in the motor waste heat recovery heating mode, the radiator (13) and the cold core (15) are turned off, and the battery heat exchanger (17), the condenser (11), the motor heat exchanger (12), the evaporator (14), the warm core (16), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface of the second three-way valve (32) is communicated with the second interface and the third interface respectively, the first interface of the first four-way valve (41) is communicated with the third interface, the first interface and the second interface of the first three-way valve (31) are communicated with each other, the second interface and the third interface of the second four-way valve (42) are communicated with each other, the first interface and the third interface of the fourth three-way valve (34) are communicated with each other, the second interface and the fourth interface of the first four-way valve (41) are communicated with each other, the third interface of the third three-way valve (33) is communicated with the first interface, and the first interface and the fourth interface of the second four-way valve (42) are communicated with each other.

7. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a battery waste heat recovery heating mode, the motor heat exchanger (12), the radiator (13), the cold core (15) and the third three-way valve (33) are closed, and the battery heat exchanger (17), the condenser (11), the evaporator (14), the warm core (16), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface and the second interface of the second three-way valve (32) are connected, the first interface and the third interface of the fourth three-way valve (34) are connected, the second interface and the third interface of the first four-way valve (41) are connected, the first interface and the second interface of the first three-way valve (31) are connected, and the second interface and the fourth interface of the second four-way valve (42) are connected.

8. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in the dehumidification mode, the motor heat exchanger (12), the radiator (13) and the third three-way valve (33) are closed, and the battery heat exchanger (17), the condenser (11), the evaporator (14), the cold core (15), the warm core (16), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface of the second three-way valve (32) is in communication with the second interface, the first interface of the fourth three-way valve (34) is in communication with the second interface and the third interface respectively, the second interface of the first four-way valve (41) is in communication with the third interface, the first interface of the first three-way valve (31) is in communication with the second interface, and the second interface of the second four-way valve (42) is in communication with the fourth interface.

9. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in the radiator defrosting mode, the warm core (16) and the cold core (15) are turned off, and the battery heat exchanger (17), the condenser (11), the motor heat exchanger (12), the radiator (13), the evaporator (14), the first water pump (21), the second water pump (22), the third water pump (23), the first three-way valve (31), the second three-way valve (32), the third three-way valve (33), the fourth three-way valve (34), the first four-way valve (41) and the second four-way valve (42) are started; The first interface of the second three-way valve (32) is communicated with the third interface, the first interface of the first four-way valve (41) is communicated with the fourth interface, the third interface of the third three-way valve (33) is communicated with the second interface, the first interface of the second four-way valve (42) is communicated with the third interface, the first interface of the fourth three-way valve (34) is communicated with the third interface, the second interface of the first four-way valve (41) is communicated with the third interface, the first interface of the first three-way valve (31) is communicated with the second interface, and the second interface of the second four-way valve (42) is communicated with the fourth interface.

10. A vehicle air conditioner, characterized in that: It comprises an air conditioner body and the indirect heat pump system according to any one of claims 1 to 9, wherein the indirect heat pump system is arranged in the air conditioner body.

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