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 warm core, a radiator, a battery heat exchanger, a cold core, an evaporator, a twelve-way valve, a first water pump, a second water pump and a third water pump. On-off among the condenser, the motor heat exchanger, the warm core, the radiator, the battery heat exchanger, the cold core and the evaporator can be controlled through the twelve-way valve. 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 heater core, a radiator, a battery heat exchanger, a cooler core, an evaporator, a twelve-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 inlet of the second water pump, the outlet of the second water pump is communicated with the first interface of the twelve-way valve, the second interface of the twelve-way valve is communicated with the inlet of the heater core, and the outlet of the heater core is communicated with the first inlet of the condenser;

[0010] The twelfth interface of the twelve-way valve is communicated with the inlet of the motor heat exchanger, the outlet of the motor heat exchanger is communicated with the fifth interface of the twelve-way valve and the inlet of the radiator respectively, the outlet of the radiator is communicated with the fourth interface of the twelve-way valve, and the third interface of the twelve-way valve is communicated with the first inlet of the condenser;

[0011] The first outlet of the evaporator is communicated with the inlet of the first water pump, the outlet of the first water pump is communicated with the eleventh interface of the twelve-way valve and the inlet of the cold core respectively, the outlet of the cold core is communicated with the seventh interface of the twelve-way valve, and the sixth interface of the twelve-way valve is communicated with the first inlet of the evaporator;

[0012] The tenth interface of the twelve-way valve is communicated with the inlet of the third water pump, the outlet of the third water pump is communicated with the inlet of the battery heat exchanger, and the outlet of the battery heat exchanger is communicated with the ninth interface and the eighth interface of the twelve-way valve respectively;

[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 cabin cooling mode, the warm core, the battery heat exchanger and the third water pump are turned off, and the condenser, the motor heat exchanger, the radiator, the cold core, the evaporator, the twelve-way valve, the first water pump and the second water pump are started;

[0015] The first interface of the twelve-way valve is communicated with the twelfth interface, the fourth interface of the twelve-way valve is communicated with the third interface, and the seventh interface of the twelve-way valve is communicated with the sixth interface.

[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 condenser, the motor heat exchanger, the radiator, the battery heat exchanger, the evaporator, the twelve-way valve, the first water pump, the second water pump and the third water pump are started;

[0017] The first interface of the twelve-way valve is communicated with the twelfth interface, the fourth interface of the twelve-way valve is communicated with the third interface, the eleventh interface of the twelve-way valve is communicated with the tenth interface, and the eighth interface of the twelve-way valve is communicated with the sixth interface.

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

[0019] The first interface of the twelve-way valve is connected to the twelfth interface, the fourth interface of the twelve-way valve is connected to the third interface, the eleventh interface of the twelve-way valve is connected to the tenth interface, and the eighth interface and the seventh interface of the twelve-way valve are both connected to the sixth interface.

[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 condenser, the motor heat exchanger, the warm core, the radiator, the battery heat exchanger, the evaporator, the twelve-way valve, the first water pump, the second water pump and the third water pump are started;

[0021] The first interface of the twelve-way valve is connected to the second interface and the tenth interface respectively, the eighth interface of the twelve-way valve is connected to the third interface, the eleventh interface of the twelve-way valve is connected to the twelfth interface, and the fourth interface of the twelve-way valve is connected to the sixth interface.

[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 condenser, the motor heat exchanger, the warm core, the battery heat exchanger, the evaporator, the twelve-way valve, the first water pump, the second water pump and the third water pump are started;

[0023] The first interface of the twelve-way valve is connected to the second interface and the tenth interface respectively, the eighth interface of the twelve-way valve is connected to the third interface, the eleventh interface of the twelve-way valve is connected to the twelfth interface, and the fifth interface of the twelve-way valve is connected to the sixth interface.

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

[0025] The first interface of the twelve-way valve is communicated with the second interface, the eleventh interface of the twelve-way valve is communicated with the tenth interface, and the eighth interface of the twelve-way valve is communicated with the sixth interface.

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

[0027] The first interface of the twelve-way valve is communicated with the second interface, the eleventh interface of the twelve-way valve is communicated with the tenth interface, and the eighth interface and the seventh interface of the twelve-way valve are both communicated with the sixth interface.

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

[0029] The first interface of the twelve-way valve is communicated with the twelfth interface, the fourth interface of the twelve-way valve is communicated with the third interface, the eleventh interface of the twelve-way valve is communicated with the tenth interface, and the eighth interface of the twelve-way valve is communicated with the sixth 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 warm core, a radiator, a battery heat exchanger, a cold core, an evaporator, a twelve-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 twelve-way valve 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 2is 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. Warm core; 14. Radiator; 15. Battery heat exchanger; 16. Cooling core; 17. Evaporator;

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

[0047] 31. Twelve-way valve. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Specifically, Figure 1 As 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.

[0054] The coolant circuit includes a condenser 11, a motor heat exchanger 12, a heating core 13, a radiator 14, a battery heat exchanger 15, a cooling core 16, an evaporator 17, a twelve-way valve 31, 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 connected to the inlet of the second water pump 22, the outlet of the second water pump 22 is connected to the first interface a of the twelve-way valve 31, the second interface b of the twelve-way valve 31 is connected to the inlet of the heating core 13, the outlet of the heating core 13 is connected to the first inlet of the condenser 11, the twelfth interface I of the twelve-way valve 31 is connected to the inlet of the motor heat exchanger 12, the outlet of the motor heat exchanger 12 is connected to the fifth interface e of the twelve-way valve 31 and the inlet of the radiator 14 respectively, the outlet of the radiator 14 is connected to the fourth interface d of the twelve-way valve 31, the third interface c of the twelve-way valve 31 is connected to the condenser 11, and the third interface c of the twelve-way valve 31 is connected to the condenser 11. 11, the first outlet of the evaporator 17 is connected to the inlet of the first water pump 21, the outlet of the first water pump 21 is respectively connected to the eleventh interface k of the twelve-way valve 31 and the inlet of the cold core 16, the outlet of the cold core 16 is connected to the seventh interface g of the twelve-way valve 31, the sixth interface f of the twelve-way valve 31 is connected to the first inlet of the evaporator 17, the tenth interface j of the twelve-way valve 31 is connected to the inlet of the third water pump 23, the outlet of the third water pump 23 is connected to the inlet of the battery heat exchanger 15, and the outlet of the battery heat exchanger 15 is respectively connected to the ninth interface i and the eighth interface h of the twelve-way valve 31.

[0055] The refrigerant circuit also includes a condenser 11 and an evaporator 17 , that is, the refrigerant circuit and the cooling liquid circuit share the condenser 11 and the evaporator 17 , and the refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser 11 and the evaporator 17 .

[0056] Optionally, in one possible embodiment, the refrigerant circuit includes a compressor, an evaporator 17 and a condenser 11. The outlet of the compressor is communicated with the second inlet of the evaporator 17, the second outlet of the evaporator 17 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.

[0057] Optionally, continue to see Figure 1 In this embodiment, the twelve-way valve 31, 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 warm core 13, the radiator 14, the battery heat exchanger 15, the cold core 16 and the evaporator 17 are arranged around the twelve-way valve 31, 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.

[0058] The indirect heat pump system can switch between eight working modes according to different usage requirements by controlling the on-off status of each interface of the twelve-way valve 31. The system has a large number of 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 various working modes is also relatively simple.

[0059] 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.

[0060] Figure 2 This is a schematic diagram of the indirect heat pump system in the single passenger compartment cooling mode. At this time, the warm core 13, the battery heat exchanger 15 and the third water pump 23 are turned off, and the condenser 11, the motor heat exchanger 12, the radiator 14, the cold core 16, the evaporator 17, the twelve-way valve 31, the first water pump 21 and the second water pump 22 are started. The first interface a of the twelve-way valve 31 is connected to the twelfth interface I, the fourth interface d of the twelve-way valve 31 is connected to the third interface c, and the seventh interface g of the twelve-way valve 31 is connected to the sixth interface f.

[0061] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0062] 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 17, causing the coolant to cool down.

[0063] Coolant circuit: includes heat dissipation circuit and cabin cooling circuit.

[0064] 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 enters the second water pump 22, and enters the motor heat exchanger 12 through the first interface a of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 in sequence under the transportation of the second water pump 22. After absorbing the heat of the motor, it enters the radiator 14 for heat dissipation. The coolant cooled by the radiator 14 returns to the condenser 11 through the fourth interface d of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in sequence. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0065] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 17 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and enters the cold core 16 under the transportation of the first water pump 21. The low-temperature coolant in the cold core 16 exchanges heat with the passenger compartment. The heated coolant returns to the evaporator 17 through the seventh interface g of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence.

[0066] Figure 3 This is a schematic diagram of the indirect heat pump system in the single battery cooling mode. At this time, the warm core 13 and the cold core 16 are turned off, and the condenser 11, the motor heat exchanger 12, the radiator 14, the battery heat exchanger 15, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the twelfth interface I, the fourth interface d of the twelve-way valve 31 is connected to the third interface c, the eleventh interface k of the twelve-way valve 31 is connected to the tenth interface j, and the eighth interface h of the twelve-way valve 31 is connected to the sixth interface f.

[0067] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0068] 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 17, causing the coolant to cool down.

[0069] Coolant circuit: includes heat dissipation circuit and battery cooling circuit.

[0070] 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 enters the second water pump 22, and enters the motor heat exchanger 12 through the first interface a of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 in sequence under the transportation of the second water pump 22. After absorbing the heat of the motor, it enters the radiator 14 for heat dissipation. The coolant cooled by the radiator 14 returns to the condenser 11 through the fourth interface d of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in sequence. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0071] In the battery refrigeration circuit, the coolant absorbs heat in the evaporator 17 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and under the transportation of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in turn to enter the third water pump 23, and under the transportation of the third water pump 23, it enters the battery heat exchanger 15. The coolant in the battery heat exchanger 15 absorbs the heat of the battery to cool the battery. The coolant that has heated up after absorbing heat passes through the eighth interface h of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in turn and returns to the evaporator 17.

[0072] Figure 4 This is a schematic diagram of the indirect heat pump system in the passenger compartment and battery dual cooling mode. At this time, the warm core 13 is turned off, and the condenser 11, the motor heat exchanger 12, the radiator 14, the battery heat exchanger 15, the cold core 16, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the twelfth interface I, the fourth interface d of the twelve-way valve 31 is connected to the third interface, the eleventh interface k of the twelve-way valve 31 is connected to the tenth interface j, and the eighth interface h and the seventh interface g of the twelve-way valve 31 are both connected to the sixth interface f.

[0073] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0074] 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 17, causing the coolant to cool down.

[0075] Coolant circuit: includes heat dissipation circuit, battery cooling circuit and cabin cooling circuit.

[0076] 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 enters the second water pump 22, and enters the motor heat exchanger 12 through the first interface a of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 in sequence under the transportation of the second water pump 22. After absorbing the heat of the motor, it enters the radiator 14 for heat dissipation. The coolant cooled by the radiator 14 returns to the condenser 11 through the fourth interface d of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in sequence. With such an arrangement, the motor can be cooled during the heat dissipation process, thereby improving the energy utilization efficiency.

[0077] In the battery refrigeration circuit, the coolant absorbs heat in the evaporator 17 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and under the transportation of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in turn to enter the third water pump 23, and under the transportation of the third water pump 23, it enters the battery heat exchanger 15. The coolant in the battery heat exchanger 15 absorbs the heat of the battery to cool the battery. The coolant that has heated up after absorbing heat passes through the eighth interface h of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in turn and returns to the evaporator 17.

[0078] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 17 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and enters the cold core 16 under the transportation of the first water pump 21. The low-temperature coolant in the cold core 16 exchanges heat with the passenger compartment. The heated coolant returns to the evaporator 17 through the seventh interface g of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence.

[0079] 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 17 is divided into two branches at the outlet of the first water pump 21, one branch flows through the cold core 16 and then returns to the evaporator 17 to achieve cooling of the passenger compartment, and the other branch flows through the battery heat exchanger 15 and then returns to the evaporator 17 to achieve cooling of the battery.

[0080] Figure 5 This is a schematic diagram of the indirect heat pump system in the passenger compartment and battery dual heating mode. At this time, the cold core 16 is turned off, and the condenser 11, the motor heat exchanger 12, the warm core 13, the radiator 14, the battery heat exchanger 15, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the second interface b and the tenth interface j respectively, the eighth interface h of the twelve-way valve 31 is connected to the third interface c, the eleventh interface k of the twelve-way valve 31 is connected to the twelfth interface I, and the fourth interface d of the twelve-way valve 31 is connected to the sixth interface f.

[0081] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0082] 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 17, causing the coolant to cool down.

[0083] Coolant circuit: includes cabin heating circuit, battery heating circuit and air source heat pump circuit.

[0084] 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the second interface b of the twelve-way valve 31 in sequence and enters the heater core 13. The high-temperature coolant in the heater core 13 will exchange heat with the passenger compartment to heat the passenger compartment, and the cooled coolant coming out of the heater core 13 returns to the condenser 11.

[0085] In the battery 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in turn to enter the third water pump 23, and under the transportation of the third water pump 23, it enters the battery heat exchanger 15. In the battery heat exchanger 15, the high-temperature coolant exchanges heat with the battery to heat the battery and realize heating of the battery. After the heat exchange, the low-temperature coolant passes through the eighth interface h of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in turn and returns to the condenser 11.

[0086] 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 at the first interface a of the twelve-way valve 31. One branch flows through the heater core 13 and then returns to the condenser 11 to heat the passenger compartment, and the other branch flows through the battery heat exchanger 15 and then returns to the condenser 11 to heat the battery.

[0087] In the air source heat pump circuit, the coolant in the evaporator 17 is cooled by the heat absorbed by the refrigerant, and the low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and under the transportation of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 in sequence to enter the motor heat exchanger 12 to recover the waste heat of the motor, and then enters the radiator 14 to exchange heat with the air in the radiator 14, and then passes through the fourth interface d of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence to return to the evaporator 17. In the air source heat pump circuit, the low-temperature coolant absorbs heat from the air in the radiator 14 and absorbs heat from the motor in the motor heat exchanger 12, which can not only cool the motor but also improve the energy utilization efficiency.

[0088] Figure 6This is a schematic diagram of an indirect heat pump system in a motor waste heat recovery heating mode. At this time, the radiator 14 and the cold core 16 are turned off, and the condenser 11, the motor heat exchanger 12, the warm core 13, the battery heat exchanger 15, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the second interface b and the tenth interface j respectively, the eighth interface h of the twelve-way valve 31 is connected to the third interface c, the eleventh interface k of the twelve-way valve 31 is connected to the twelfth interface I, and the fifth interface e of the twelve-way valve 31 is connected to the sixth interface f.

[0089] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0090] 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 17, causing the coolant to cool down.

[0091] Coolant circuit: includes cabin heating circuit, battery heating circuit and motor waste heat recovery circuit.

[0092] 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the second interface b of the twelve-way valve 31 in sequence and enters the heater core 13. The high-temperature coolant in the heater core 13 will exchange heat with the passenger compartment to heat the passenger compartment, and the cooled coolant coming out of the heater core 13 returns to the condenser 11.

[0093] In the battery 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in turn to enter the third water pump 23, and under the transportation of the third water pump 23, it enters the battery heat exchanger 15. In the battery heat exchanger 15, the high-temperature coolant exchanges heat with the battery to heat the battery and realize heating of the battery. After the heat exchange, the low-temperature coolant passes through the eighth interface h of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in turn and returns to the condenser 11.

[0094] That is, in the motor waste heat recovery heating mode, the high-temperature coolant flowing out from the first outlet of the condenser 11 is divided into two branches at the first interface a of the twelve-way valve 31. One branch flows through the heater core 13 and then returns to the condenser 11 to heat the passenger compartment, and the other branch flows through the battery heat exchanger 15 and then returns to the condenser 11 to heat the battery.

[0095] In the motor waste heat recovery loop, the coolant in the evaporator 17 absorbs heat and its temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 17 enters the first water pump 21, and under the transportation of the first water pump 21, it sequentially passes through the eleventh interface k of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 to enter the motor heat exchanger 12 to recover the waste heat of the motor, and then sequentially passes through the fifth interface e of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 to return to the evaporator 17. In the motor waste heat recovery loop, the waste heat of the motor can be recovered, which can not only cool the motor, but also improve the energy utilization efficiency.

[0096] Figure 7 This is a schematic diagram of the indirect heat pump system in the battery waste heat recovery heating mode. At this time, the motor heat exchanger 12, the radiator 14 and the cold core 16 are turned off, and the condenser 11, the warm core 13, the battery heat exchanger 15, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the second interface b, the eleventh interface k of the twelve-way valve 31 is connected to the tenth interface j, and the eighth interface h of the twelve-way valve 31 is connected to the sixth interface f.

[0097] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0098] 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 17, causing the coolant to cool down.

[0099] Coolant circuit: includes cabin heating circuit and battery waste heat recovery circuit.

[0100] 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the second interface b of the twelve-way valve 31 in sequence and enters the heater core 13. The high-temperature coolant in the heater core 13 will exchange heat with the passenger compartment to heat the passenger compartment, and the cooled coolant coming out of the heater core 13 returns to the condenser 11.

[0101] In the battery waste heat recovery loop, the coolant in the evaporator 17 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 17 enters the first water pump 21, and under the delivery of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in sequence to enter the third water pump 23, and under the delivery of the third water pump 23, it enters the battery heat exchanger 15 to recover the waste heat of the battery, and then passes through the eighth interface h of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence to return to the evaporator 17. In the battery waste heat recovery loop, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0102] Figure 8 This is a schematic diagram of the indirect heat pump system in dehumidification mode. At this time, the motor heat exchanger 12 and the radiator 14 are turned off, and the condenser 11, the warm core 13, the battery heat exchanger 15, the cold core 16, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the second interface b, the eleventh interface k of the twelve-way valve 31 is connected to the tenth interface j, and the eighth interface h and the seventh interface g of the twelve-way valve 31 are both connected to the sixth interface f.

[0103] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0104] 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 17, causing the coolant to cool down.

[0105] Coolant circuit: includes cabin heating circuit, cabin cooling circuit and battery waste heat recovery circuit.

[0106] 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the second interface b of the twelve-way valve 31 in sequence and enters the heater core 13. The high-temperature coolant in the heater core 13 will exchange heat with the passenger compartment to heat the passenger compartment, and the cooled coolant coming out of the heater core 13 returns to the condenser 11.

[0107] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 17 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 17 enters the first water pump 21, and enters the cold core 16 under the transportation of the first water pump 21. The low-temperature coolant in the cold core 16 exchanges heat with the passenger compartment. The heated coolant returns to the evaporator 17 through the seventh interface g of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence.

[0108] That is, when the cold core 16 and the warm core 13 simultaneously exchange heat with the passenger compartment, the passenger compartment is dehumidified.

[0109] In the battery waste heat recovery loop, the coolant in the evaporator 17 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 17 enters the first water pump 21, and under the delivery of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in sequence to enter the third water pump 23, and under the delivery of the third water pump 23, it enters the battery heat exchanger 15 to recover the waste heat of the battery, and then passes through the eighth interface h of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence to return to the evaporator 17. In the battery waste heat recovery loop, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0110] Fig. 9 It is a schematic diagram of the indirect heat pump system in the radiator defrosting mode. At this time, the warm core 13 and the cold core 16 are turned off, and the condenser 11, the motor heat exchanger 12, the radiator 14, the battery heat exchanger 15, the evaporator 17, the twelve-way valve 31, the first water pump 21, the second water pump 22 and the third water pump 23 are started. The first interface a of the twelve-way valve 31 is connected to the twelfth interface I, the fourth interface d of the twelve-way valve 31 is connected to the third interface c, the eleventh interface k of the twelve-way valve 31 is connected to the tenth interface j, and the eighth interface h of the twelve-way valve 31 is connected to the sixth interface f.

[0111] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0112] 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 17, causing the coolant to cool down.

[0113] Coolant circuit: includes radiator defrosting circuit and battery waste heat recovery circuit.

[0114] In the radiator defrost 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 enters the second water pump 22, and under the transportation of the second water pump 22, it passes through the first interface a of the twelve-way valve 31 and the twelfth interface I of the twelve-way valve 31 in sequence to enter the motor heat exchanger 12, and enters the radiator 14 after absorbing the heat of the motor. The high-temperature coolant heats the radiator 14 to defrost the radiator 14. The coolant that has been cooled after heat exchange with the radiator 14 passes through the fourth interface d of the twelve-way valve 31 and the third interface c of the twelve-way valve 31 in sequence and returns to the condenser 11.

[0115] In the battery waste heat recovery loop, the coolant in the evaporator 17 absorbs heat and the temperature is lowered. The low-temperature coolant flowing out of the first outlet of the evaporator 17 enters the first water pump 21, and under the delivery of the first water pump 21, it passes through the eleventh interface k of the twelve-way valve 31 and the tenth interface j of the twelve-way valve 31 in sequence to enter the third water pump 23, and under the delivery of the third water pump 23, it enters the battery heat exchanger 15 to recover the waste heat of the battery, and then passes through the eighth interface h of the twelve-way valve 31 and the sixth interface f of the twelve-way valve 31 in sequence to return to the evaporator 17. In the battery waste heat recovery loop, the waste heat of the battery can be recovered, which can not only cool the battery, but also improve the energy utilization efficiency.

[0116] 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.

[0117] 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.

[0118] 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 heating core (13), a radiator (14), a battery heat exchanger (15), a cooling core (16), an evaporator (17), a twelve-way valve (31), 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 inlet of the second water pump (22), the outlet of the second water pump (22) is communicated with the first interface of the twelve-way valve (31), the second interface of the twelve-way valve (31) is communicated with the inlet of the heater core (13), and the outlet of the heater core (13) is communicated with the first inlet of the condenser (11); The twelfth interface of the twelve-way valve (31) is in communication with the inlet of the motor heat exchanger (12); the outlet of the motor heat exchanger (12) is in communication with the fifth interface of the twelve-way valve (31) and the inlet of the radiator (14) respectively; the outlet of the radiator (14) is in communication with the fourth interface of the twelve-way valve (31); and the third interface of the twelve-way valve (31) is in communication with the first inlet of the condenser (11); The first outlet of the evaporator (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 eleventh interface of the twelve-way valve (31) and the inlet of the cold core (16), the outlet of the cold core (16) is communicated with the seventh interface of the twelve-way valve (31), and the sixth interface of the twelve-way valve (31) is communicated with the first inlet of the evaporator (17); The tenth interface of the twelve-way valve (31) is communicated with the inlet of the third water pump (23), the outlet of the third water pump (23) is communicated with the inlet of the battery heat exchanger (15), and the outlet of the battery heat exchanger (15) is communicated with the ninth interface and the eighth interface of the twelve-way valve (31) respectively; The refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser (11) and the evaporator (17).

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 heater core (13), the battery heat exchanger (15) and the third water pump (23) are turned off, and the condenser (11), the motor heat exchanger (12), the radiator (14), the cooling core (16), the evaporator (17), the twelve-way valve (31), the first water pump (21) and the second water pump (22) are started; The first interface of the twelve-way valve (31) is communicated with the twelfth interface, the fourth interface of the twelve-way valve (31) is communicated with the third interface, and the seventh interface of the twelve-way valve (31) is communicated with the sixth interface.

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 (13) and the cold core (16) are turned off, and the condenser (11), the motor heat exchanger (12), the radiator (14), the battery heat exchanger (15), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22), and the third water pump (23) are started; The first interface of the twelve-way valve (31) is connected to the twelfth interface, the fourth interface of the twelve-way valve (31) is connected to the third interface, the eleventh interface of the twelve-way valve (31) is connected to the tenth interface, and the eighth interface of the twelve-way valve (31) is connected to the sixth interface.

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 (13) is turned off, and the condenser (11), the motor heat exchanger (12), the radiator (14), the battery heat exchanger (15), the cold core (16), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is communicated with the twelfth interface, the fourth interface of the twelve-way valve (31) is communicated with the third interface, the eleventh interface of the twelve-way valve (31) is communicated with the tenth interface, and the eighth interface and the seventh interface of the twelve-way valve (31) are both communicated with the sixth interface.

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 (16) is turned off, and the condenser (11), the motor heat exchanger (12), the warm core (13), the radiator (14), the battery heat exchanger (15), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is communicated with the second interface and the tenth interface respectively, the eighth interface of the twelve-way valve (31) is communicated with the third interface, the eleventh interface of the twelve-way valve (31) is communicated with the twelfth interface, and the fourth interface of the twelve-way valve (31) is communicated with the sixth 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 (14) and the cold core (16) are turned off, and the condenser (11), the motor heat exchanger (12), the warm core (13), the battery heat exchanger (15), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is communicated with the second interface and the tenth interface respectively, the eighth interface of the twelve-way valve (31) is communicated with the third interface, the eleventh interface of the twelve-way valve (31) is communicated with the twelfth interface, and the fifth interface of the twelve-way valve (31) is communicated with the sixth interface.

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 (14) and the cold core (16) are turned off, and the condenser (11), the warm core (13), the battery heat exchanger (15), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is in communication with the second interface, the eleventh interface of the twelve-way valve (31) is in communication with the tenth interface, and the eighth interface of the twelve-way valve (31) is in communication with the sixth interface.

8. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a dehumidification mode, the motor heat exchanger (12) and the radiator (14) are turned off, and the condenser (11), the warm core (13), the battery heat exchanger (15), the cold core (16), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is in communication with the second interface, the eleventh interface of the twelve-way valve (31) is in communication with the tenth interface, and the eighth interface and the seventh interface of the twelve-way valve (31) are both in communication with the sixth interface.

9. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a radiator defrosting mode, the warm core (13) and the cold core (16) are turned off, and the condenser (11), the motor heat exchanger (12), the radiator (14), the battery heat exchanger (15), the evaporator (17), the twelve-way valve (31), the first water pump (21), the second water pump (22) and the third water pump (23) are started; The first interface of the twelve-way valve (31) is connected to the twelfth interface, the fourth interface of the twelve-way valve (31) is connected to the third interface, the eleventh interface of the twelve-way valve (31) is connected to the tenth interface, and the eighth interface of the twelve-way valve (31) is connected to the sixth 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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