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 warm core, a radiator, a cold core, an evaporator, a battery heat exchanger, a motor heat exchanger, a first three-way valve, a second three-way valve, a nine-way valve, a first water pump, a second water pump, a third water pump and a fourth water pump. The first three-way valve, the second three-way valve and the nine-way valve can control 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. 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 heating core, a radiator, a cooling core, an evaporator, a battery heat exchanger, a motor heat exchanger, a first three-way valve, a second three-way valve, a nine-way valve, a first water pump, a second water pump, a third water pump and a fourth water pump;

[0009] The first outlet of the condenser is communicated with the inlet of the second water pump and the second interface of the nine-way valve respectively, the outlet of the second water pump 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 fourth interface of the nine-way valve is communicated with the inlet of the radiator, the outlet of the radiator is communicated with the fifth interface of the nine-way valve, the first interface of the nine-way valve is communicated with the inlet of the first water pump, the outlet of the first water pump is communicated with the motor heat exchanger, the outlet of the motor heat exchanger is communicated with the first interface of the first third-way valve, the third interface of the first three-way valve is communicated with the first inlet of the condenser, and the second interface of the first three-way valve is communicated with the second interface of the nine-way valve;

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

[0012] The seventh interface of the nine-way valve is communicated with the inlet of the battery heat exchanger, the outlet of the battery heat exchanger is communicated with the ninth interface of the nine-way valve, the eighth interface of the nine-way valve is communicated with the inlet of the fourth water pump, the outlet of the fourth water pump 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 first inlet of the evaporator, the third interface of the second three-way valve is communicated with the sixth interface of the nine-way valve, and the third interface of the nine-way valve is communicated with the inlet of the fourth water pump;

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

[0015] The sixth interface of the nine-way valve is connected to the seventh interface, the ninth interface of the nine-way valve is connected to the first interface, the first interface of the first three-way valve is connected to the second interface and the third interface respectively, the second interface of the nine-way valve is connected to the third interface, and the first interface of the second three-way valve is connected to the second interface.

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

[0017] The sixth interface of the nine-way valve is connected to the fourth interface, the fifth interface of the nine-way valve is connected to the eighth interface, the second interface of the nine-way valve is connected to the seventh interface, the ninth interface of the nine-way valve is connected to the first interface, and the first interface of the first three-way valve is connected to the second interface and the third interface respectively.

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

[0019] The sixth interface of the nine-way valve is connected to the seventh interface, the ninth interface of the nine-way valve is connected to the first interface, the first interface of the first three-way valve is connected to the second interface and the third interface respectively, the second interface of the nine-way valve is connected to the third interface and the fourth interface respectively, the fifth interface of the nine-way valve is connected to the eighth interface, and the first interface of the second three-way valve is connected to the second interface and the third interface respectively.

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

[0021] The sixth interface of the nine-way valve is connected to the seventh interface, the ninth interface of the nine-way valve is connected to the first interface, the first interface of the first three-way valve is connected to the third interface, the second interface of the nine-way valve is connected to the fourth interface, the fifth interface of the nine-way valve is connected to the eighth interface, and the first interface of the second three-way valve is connected to the second interface.

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

[0023] The second interface of the nine-way valve is communicated with the fourth interface, the fifth interface of the nine-way valve is communicated with the first interface, the first interface of the first three-way valve is communicated with the third interface, and the ninth interface of the nine-way valve is communicated with the seventh interface.

[0024] Optionally, the nine-way valve includes an eight-way valve and a third three-way valve, and the third interface of the eight-way valve is connected to the inlet of the third three-way valve, so that the two outlets of the third three-way valve become the third interface and the fourth interface of the nine-way valve respectively.

[0025] Optionally, the third three-way valve is a three-way proportional valve.

[0026] Optionally, the first three-way valve, the second three-way valve, the nine-way valve, the first water pump, the second water pump, the third water pump and the fourth water pump are arranged in the middle of the indirect heat pump system, and the condenser, the warm core, the radiator, the cold core, the evaporator, the battery heat exchanger and the motor heat exchanger are arranged around the first three-way valve, the second three-way valve, the nine-way valve, the first water pump, the second water pump, the third water pump and the fourth water pump in sequence.

[0027] 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.

[0028] Beneficial effects of the utility model:

[0029] The utility model provides an indirect heat pump system, including a coolant circuit and a refrigerant circuit. The coolant circuit includes a condenser, a warm core, a radiator, a cold core, an evaporator, a battery heat exchanger, a motor heat exchanger, a first three-way valve, a second three-way valve, a nine-way valve, a first water pump, a second water pump, a third water pump and a fourth 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 and the nine-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.

[0030] 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

[0031] 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.

[0032] Figure 1 It is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model;

[0033] 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 heating mode;

[0034] Figure 3 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;

[0035] Figure 4 is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model in a dehumidification mode;

[0036] Figure 5 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;

[0037] Figure 6 It is a schematic diagram of the indirect heat pump system provided by an embodiment of the utility model in a single passenger cabin cooling mode.

[0038] In the figure:

[0039] 11. Condenser; 12. Warm core; 13. Radiator; 14. Cold core; 15. Evaporator; 16. Battery heat exchanger; 17. Motor heat exchanger;

[0040] 21. First water pump; 22. Second water pump; 23. Third water pump; 24. Fourth water pump;

[0041] 31. First three-way valve; 32. Second three-way valve;

[0042] 41. Nine-way valve. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The coolant circuit includes a condenser 11 , a warm core 12 , a radiator 13 , a cold core 14 , an evaporator 15 , a battery heat exchanger 16 , a motor heat exchanger 17 , a first three-way valve 31 , a second three-way valve 32 , a nine-way valve 41 , a first water pump 21 , a second water pump 22 , a third water pump 23 and a fourth water pump 24 . Among them, the first outlet of the condenser 11 is communicated with the inlet of the second water pump 22 and the second interface b of the nine-way valve 41 respectively, the outlet of the second water pump 22 is communicated with the inlet of the warm core 12, the outlet of the warm core 12 is communicated with the first inlet of the condenser 11, the fourth interface d of the nine-way valve 41 is communicated with the inlet of the radiator 13, the outlet of the radiator 13 is communicated with the fifth interface e of the nine-way valve 41, the first interface a of the nine-way valve 41 is communicated with the inlet of the first water pump 21, the outlet of the first water pump 21 is communicated with the motor heat exchanger 17, the outlet of the motor heat exchanger 17 is communicated with the first interface a of the first three-way valve 31, the third interface c of the first three-way valve 31 is communicated with the first inlet of the condenser 11, the second interface b of the first three-way valve 31 is communicated with the second interface b of the nine-way valve 41, and the steam The first outlet of the evaporator 15 is communicated with the sixth interface f of the nine-way valve 41 and the inlet of the third water pump 23 respectively, the outlet of the third water pump 23 is communicated with the inlet of the cold core 14, the outlet of the cold core 14 is communicated with the first inlet of the evaporator 15, the seventh interface g of the nine-way valve 41 is communicated with the inlet of the battery heat exchanger 16, the outlet of the battery heat exchanger 16 is communicated with the ninth interface i of the nine-way valve 41, the eighth interface h of the nine-way valve 41 is communicated with the inlet of the fourth water pump 24, the outlet of the fourth water pump 24 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 first inlet of the evaporator 15, the third interface c of the second three-way valve 32 is communicated with the sixth interface f of the nine-way valve 41, and the third interface c of the nine-way valve 41 is communicated with the inlet of the fourth water pump 24.

[0050] The refrigerant circuit also includes a condenser 11 and an evaporator 15 , that is, the refrigerant circuit and the cooling liquid circuit share the condenser 11 and the evaporator 15 , and the refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser 11 and the evaporator 15 .

[0051] Optionally, in a possible embodiment, the refrigerant circuit includes a compressor, an evaporator 15 and a condenser 11. The outlet of the compressor is communicated with the second inlet of the evaporator 15, the second outlet of the evaporator 15 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.

[0052] Optionally, continue to see Figure 1In this embodiment, the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the second water pump 22, the third water pump 23 and the fourth water pump 24 are arranged in the middle of the indirect heat pump system, and the condenser 11, the warm core 12, the radiator 13, the cold core 14, the evaporator 15, the battery heat exchanger 16 and the motor heat exchanger 17 are arranged in sequence around (for example, in a counterclockwise direction) the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the second water pump 22, the third water pump 23 and the fourth water pump 24. Such an arrangement can improve the structural compactness of the indirect heat pump system.

[0053] Further, see Figure 1 In this embodiment, the nine-way valve 41 includes an eight-way valve and a third three-way valve, and the third interface of the eight-way valve is connected to the inlet of the third three-way valve, so that the two outlets of the third three-way valve respectively become the third interface c and the fourth interface d of the nine-way valve 41. In this way, the function of the nine-way valve 41 can be realized by modifying the eight-way valve through the third three-way valve.

[0054] Optionally, the third three-way valve may be a three-way proportional valve to control the flow rates of the two outlets of the third three-way valve according to the working requirements of the indirect heat pump system, thereby improving the flexibility of use of the indirect heat pump system.

[0055] The indirect heat pump system can switch between five 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 and the nine-way valve 41. 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 the various working modes is also relatively simple.

[0056] The five working modes are single passenger compartment heating mode, passenger compartment and battery dual heating mode, dehumidification mode, passenger compartment and battery dual cooling mode and single passenger compartment cooling mode.

[0057] Figure 2 This is a schematic diagram of the indirect heat pump system in the single passenger compartment heating mode. At this time, the radiator 13, the cold core 14 and the third water pump 23 are turned off, and the condenser 11, the warm core 12, the evaporator 15, the battery heat exchanger 16, the motor heat exchanger 17, the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the second water pump 22 and the fourth water pump 24 are started. The sixth interface f of the nine-way valve 41 is connected to the seventh interface g, the ninth interface i of the nine-way valve 41 is connected to the first interface a, the first interface a of the first three-way valve 31 is connected to the second interface b and the third interface c respectively, the second interface b of the nine-way valve 41 is connected to the third interface c, and the first interface a of the second three-way valve 32 is connected to the second interface b.

[0058] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0059] 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 15, causing the coolant to cool down.

[0060] Coolant circuit: includes cabin heating circuit and battery motor waste heat recovery circuit.

[0061] 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 enters the heater core 12 under the transportation of the second water pump 22. The high-temperature coolant in the heater core 12 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 12 returns to the condenser 11.

[0062] In the battery motor waste heat recovery circuit, the coolant absorbs heat in the evaporator 15 and the temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 15 passes through the sixth interface f of the nine-way valve 41 and the seventh interface g of the nine-way valve 41 in turn into the battery heat exchanger 16. In the battery heat exchanger 16, the low-temperature coolant exchanges heat with the battery and absorbs the waste heat of the battery. Then, it passes through the ninth interface i of the nine-way valve 41 and the first interface a of the nine-way valve 41 in turn into the first water pump 21. Under the transportation of the first water pump 21, it enters the motor heat exchanger 17. In the motor heat exchanger 17, the low-temperature coolant exchanges heat with the motor and absorbs the waste heat of the motor. Then, it enters the first inlet of the first three-way valve 31. In a three-way valve 31, the coolant is divided into two branches in the first three-way valve 31, one branch enters the second interface b of the nine-way valve 41 through the second interface b of the first three-way valve 31, and the other branch enters the condenser 11 through the third interface c of the first three-way valve 31, exchanges heat with the high-temperature refrigerant in the condenser 11, and after absorbing residual heat again, enters the second interface b of the nine-way valve 41 through the first outlet of the condenser 11 to merge with the coolant in the other branch, and then the coolant enters the fourth water pump 24 through the third interface c of the nine-way valve 41, and under the transportation of the fourth water pump 24, it returns to the evaporator 15 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.

[0063] That is, in the battery and motor waste heat recovery circuit, the low-temperature coolant not only recovers the waste heat of the battery and the motor, but also recovers the waste heat of the refrigerant in the condenser 11. Of course, it is also possible to choose whether to recover the waste heat of the refrigerant in the condenser 11 according to the temperature requirements of the coolant. If the temperature of the coolant can meet the requirements after only recovering the waste heat of the battery and the motor, it is sufficient to control the first interface a and the second interface b of the first three-way valve 31 to be conductive.

[0064] Figure 3 This is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in the passenger compartment and battery dual heating mode. At this time, the cold core 14 and the third water pump 23 are turned off, and the condenser 11, the warm core 12, the radiator 13, the evaporator 15, the battery heat exchanger 16, the motor heat exchanger 17, the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the second water pump 22 and the fourth water pump 24 are started. The sixth interface f of the nine-way valve 41 is connected to the fourth interface d, the fifth interface e of the nine-way valve 41 is connected to the eighth interface h, the second interface b of the nine-way valve 41 is connected to the seventh interface g, the ninth interface i of the nine-way valve 41 is connected to the first interface a, and the first interface a of the first three-way valve 31 is connected to the second interface b and the third interface c respectively.

[0065] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0066] 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 15, causing the coolant to cool down.

[0067] Coolant circuit: includes cabin heating circuit, battery heating circuit and air source heat pump circuit.

[0068] 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 enters the heater core 12 under the transportation of the second water pump 22. The high-temperature coolant in the heater core 12 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 12 returns to the condenser 11.

[0069] 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 second interface b of the nine-way valve 41 and the seventh interface g of the nine-way valve 41 in turn into the battery heat exchanger 16. The high-temperature coolant exchanges heat with the battery to heat the battery and achieve heating of the battery. The low-temperature coolant after heat exchange passes through the ninth interface i of the nine-way valve 41 and the first interface a of the nine-way valve 41 in turn into the first water pump 21, enters the motor heat exchanger 17 under the transportation of the first water pump 21, and enters the first three-way valve 31 through the first interface a of the first three-way valve 31 after heat exchange with the motor heat exchanger 17. It is divided into two branches in the first three-way valve 31, one returns to the condenser 11 through the third interface c of the first three-way valve 31, and the other enters the second interface b of the nine-way valve 41 through the second interface b of the first three-way valve 31, thereby realizing self-circulation of the battery and the motor and achieving the purpose of equalizing the temperature of the battery and the motor.

[0070] Of course, if the battery and the motor have no self-circulation requirements, only the first port a and the third port c of the first three-way valve 31 may be connected.

[0071] In the air source heat pump circuit, the coolant in the evaporator 15 is cooled by the heat absorbed by the refrigerant, and the low-temperature coolant flowing out of the first outlet of the evaporator 15 enters the radiator 13 through the sixth interface f of the nine-way valve 41 and the fourth interface d of the nine-way valve 41 in sequence, exchanges heat with the air in the radiator 13, and then enters the fourth water pump 24 through the fifth interface e of the nine-way valve 41 and the eighth interface h of the nine-way valve 41 in sequence, and returns to the evaporator 15 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 under the conveyance of the fourth water pump 24. In the air source heat pump circuit, the low-temperature coolant absorbs heat from the air in the radiator 13, thereby improving the efficiency of energy utilization.

[0072] Figure 4 This is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in the dehumidification mode. At this time, the condenser 11, the warm core 12, the radiator 13, the cold core 14, the evaporator 15, the battery heat exchanger 16, the motor heat exchanger 17, the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the second water pump 22, the third water pump 23 and the fourth water pump 24 are started. The sixth interface f of the nine-way valve 41 is connected to the seventh interface g, the ninth interface i of the nine-way valve 41 is connected to the first interface a, the first interface a of the first three-way valve 31 is respectively connected to the second interface b and the third interface c, the second interface b of the nine-way valve 41 is respectively connected to the third interface c and the fourth interface d, the fifth interface e of the nine-way valve 41 is connected to the eighth interface h, and the first interface a of the second three-way valve 32 is respectively connected to the second interface b and the third interface c.

[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 15, causing the coolant to cool down.

[0075] Coolant circuit: includes cabin heating circuit, cabin cooling circuit, heat dissipation circuit and battery motor self-circulation circuit.

[0076] 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 enters the heater core 12 under the transportation of the second water pump 22. The high-temperature coolant in the heater core 12 will exchange heat with the passenger compartment to heat the passenger compartment. The cooled coolant coming out of the heater core 12 returns to the condenser 11.

[0077] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 15 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 15 enters the third water pump 23, and enters the cold core 14 under the transportation of the third water pump 23. The low-temperature coolant in the cold core 14 exchanges heat with the passenger compartment, and the heated coolant returns to the evaporator 15.

[0078] 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 sequentially passes through the second interface b of the nine-way valve 41 and the fourth interface d of the nine-way valve 41 into the radiator 13. After heat exchange with the radiator 13 in the radiator 13, the temperature decreases. Then, the coolant sequentially passes through the fifth interface e of the nine-way valve 41 and the eighth interface h of the nine-way valve 41 into the fourth water pump 24. Under the delivery of the fourth water pump 24, the coolant sequentially passes through the first interface a and the second interface b of the second three-way valve 32. After entering the evaporator 15, the temperature is further reduced after heat exchange with the refrigerant in the evaporator 15, and then it passes through the sixth interface f and the seventh interface g of the nine-way valve 41 in sequence to enter the battery heat exchanger 16, and after absorbing the heat of the battery heat exchanger 16, it passes through the ninth interface i and the first interface a of the nine-way valve 41 in sequence to enter the first water pump 21, and enters the motor heat exchanger 17 under the transportation of the first water pump 21, and after absorbing the heat of the motor heat exchanger 17, it passes through the first interface a of the first three-way valve 31 and the third interface c of the first three-way valve 31 in sequence to return to the condenser 11. In the heat dissipation circuit, the battery and the motor can be cooled down, and the heat of the battery and the motor can be recovered, thereby improving the energy utilization efficiency.

[0079] In the battery motor self-circulation loop, the coolant flowing from the outlet of the motor heat exchanger 17 enters the fourth water pump 24 through the first interface a of the first three-way valve 31, the second interface b of the first three-way valve 31, the second interface b of the nine-way valve 41 and the third interface c of the nine-way valve 41 in sequence, and enters the battery heat exchanger 16 through the first interface a of the second three-way valve 32, the third interface c of the second three-way valve 32, the sixth interface f of the nine-way valve 41 and the seventh interface g of the nine-way valve 41 in sequence under the delivery of the fourth water pump 24. The coolant coming out of the battery heat exchanger 16 enters the first water pump 21 through the ninth interface i of the nine-way valve 41 and the first interface a of the nine-way valve 41 in sequence, and returns to the motor heat exchanger 17 under the delivery of the first water pump 21. The battery motor self-circulation loop can achieve temperature uniformity of the battery and the motor, so that the battery and the motor work at a suitable temperature, which is conducive to extending the service life of the battery and the motor.

[0080] Of course, according to actual needs, the battery motor self-circulation loop may not be started during dehumidification. At this time, the first interface a of the first three-way valve 31 is controlled not to be connected to the second interface b, the second interface b of the nine-way valve 41 is controlled not to be connected to the third interface c, and the first interface a of the second three-way valve 32 is controlled not to be connected to the third interface c.

[0081] Figure 5 This is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in the passenger compartment and battery dual cooling mode. At this time, the warm core 12 and the second water pump 22 are turned off, and the condenser 11, the radiator 13, the cold core 14, the evaporator 15, the battery heat exchanger 16, the motor heat exchanger 17, the first three-way valve 31, the second three-way valve 32, the nine-way valve 41, the first water pump 21, the third water pump 23 and the fourth water pump 24 are started. The sixth interface f of the nine-way valve 41 is connected to the seventh interface g, the ninth interface i of the nine-way valve 41 is connected to the first interface a, the first interface a of the first three-way valve 31 is connected to the third interface c, the second interface b of the nine-way valve 41 is connected to the fourth interface d, the fifth interface e of the nine-way valve 41 is connected to the eighth interface h, and the first interface a of the second three-way valve 32 is connected to the second interface b.

[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 15, causing the coolant to cool down.

[0084] Coolant circuit: includes battery cooling circuit and cabin cooling circuit.

[0085] In the battery refrigeration circuit, the temperature of the coolant is lowered by the heat absorbed by the refrigerant in the evaporator 15. The low-temperature coolant flowing out from the first outlet of the evaporator 15 passes through the sixth interface f of the nine-way valve 41 and the seventh interface g of the nine-way valve 41 in turn and enters the battery heat exchanger 16. In the battery heat exchanger 16, the low-temperature coolant exchanges heat with the battery, absorbs the heat of the battery, and realizes cooling of the battery. The coolant that has absorbed the heat of the battery and heated up passes through the ninth interface i of the nine-way valve 41 and the first interface a of the nine-way valve 41 in turn and enters the first water pump 21. Under the transportation of the first water pump 21, it enters the motor heat exchanger 17 and the motor heat exchanger 18. 7, after absorbing the heat of the motor, it passes through the first interface a of the first three-way valve 31 and the third interface c of the first three-way valve 31 in turn into the condenser 11, and is heated again by the refrigerant in the condenser 11 in the condenser 11, and then passes through the second interface b of the nine-way valve 41 and the fourth interface d of the nine-way valve 41 in turn into the radiator 13, and after exchanging heat with the radiator 13, it passes through the fifth interface e of the nine-way valve 41 and the eighth interface h of the nine-way valve 41 in turn into the fourth water pump 24, and under the conveyance of the fourth water pump 24, it 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 turn to return to the evaporator 15. In the battery refrigeration circuit, the coolant recovers the heat of the motor, the evaporator 15 and the radiator 13, thereby improving the energy utilization efficiency.

[0086] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 15 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 15 enters the third water pump 23, and enters the cold core 14 under the transportation of the third water pump 23. The low-temperature coolant in the cold core 14 exchanges heat with the passenger compartment, and the heated coolant returns to the evaporator 15.

[0087] Figure 6 This is a schematic diagram of the indirect heat pump system provided by the embodiment of the utility model in the single passenger cabin cooling mode. At this time, the warm core 12, the second three-way valve 32, the second water pump 22 and the fourth water pump 24 are closed, and the condenser 11, the radiator 13, the cold core 14, the evaporator 15, the battery heat exchanger 16, the motor heat exchanger 17, the first three-way valve 31, the first water pump 21 and the third water pump 23 are started. The second interface b of the nine-way valve 41 is connected to the fourth interface d, the fifth interface e of the nine-way valve 41 is connected to the first interface a, the first interface a of the first three-way valve 31 is connected to the third interface c, and the ninth interface i of the nine-way valve 41 is connected to the seventh interface g.

[0088] After such control, the working states of the refrigerant circuit and the coolant circuit are:

[0089] 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 15, causing the coolant to cool down.

[0090] Coolant circuit: includes cabin refrigeration circuit, heat dissipation circuit and battery self-circulation circuit.

[0091] In the cabin refrigeration circuit, the coolant absorbs heat in the evaporator 15 and its temperature is lowered. The low-temperature coolant flowing out from the first outlet of the evaporator 15 enters the third water pump 23, and enters the cold core 14 under the transportation of the third water pump 23. The low-temperature coolant in the cold core 14 exchanges heat with the passenger compartment, and the heated coolant returns to the evaporator 15.

[0092] In the heat dissipation circuit, the temperature of the coolant is lowered by the heat absorbed by the refrigerant in the evaporator 15. The low-temperature coolant flowing out of the first outlet of the evaporator 15 enters the radiator 13 through the second interface b of the nine-way valve 41 and the fourth interface d of the nine-way valve 41 in sequence. The coolant after heat dissipation in the radiator 13 enters the first water pump 21 through the fifth interface e of the nine-way valve 41 and the first interface a of the nine-way valve 41 in sequence, enters the motor heat exchanger 17 under the transportation of the first water pump 21, and returns to the condenser 11 through the first interface a of the first three-way valve 31 and the first interface a and the third interface c of the first three-way valve 31 after heat exchange with the motor heat exchanger 17. In the heat dissipation circuit, the temperature of the coolant can be lowered through the radiator 13, and heat exchange can be performed with the motor, thereby improving energy utilization efficiency.

[0093] In the battery self-circulation loop, the coolant flowing out of the outlet of the battery heat exchanger 16 returns to the battery heat exchanger 16 through the ninth port i of the nine-way valve 41 and the seventh port g of the nine-way valve 41 in sequence. The battery is kept at an even temperature, which is beneficial to improving the battery life.

[0094] 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.

[0095] 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.

[0096] 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 heating core (12), a radiator (13), a cooling core (14), an evaporator (15), a battery heat exchanger (16), a motor heat exchanger (17), a first three-way valve (31), a second three-way valve (32), a nine-way valve (41), a first water pump (21), a second water pump (22), a third water pump (23) and a fourth water pump (24); The first outlet of the condenser (11) is respectively connected to the inlet of the second water pump (22) and the second interface of the nine-way valve (41), the outlet of the second water pump (22) is connected to the inlet of the heater core (12), and the outlet of the heater core (12) is connected to the first inlet of the condenser (11); The fourth interface of the nine-way valve (41) is communicated with the inlet of the radiator (13), the outlet of the radiator (13) is communicated with the fifth interface of the nine-way valve (41), the first interface of the nine-way valve (41) is communicated with the inlet of the first water pump (21), the outlet of the first water pump (21) is communicated with the motor heat exchanger (17), the outlet of the motor heat exchanger (17) is communicated with the first interface of the first three-way valve (31), the third interface of the first three-way valve (31) is communicated with the first inlet of the condenser (11), and the second interface of the first three-way valve (31) is communicated with the second interface of the nine-way valve (41); The first outlet of the evaporator (15) is respectively connected to the sixth interface of the nine-way valve (41) and the inlet of the third water pump (23); the outlet of the third water pump (23) is connected to the inlet of the cold core (14); and the outlet of the cold core (14) is connected to the first inlet of the evaporator (15); The seventh interface of the nine-way valve (41) is communicated with the inlet of the battery heat exchanger (16), the outlet of the battery heat exchanger (16) is communicated with the ninth interface of the nine-way valve (41), the eighth interface of the nine-way valve (41) is communicated with the inlet of the fourth water pump (24), the outlet of the fourth water pump (24) 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 first inlet of the evaporator (15), the third interface of the second three-way valve (32) is communicated with the sixth interface of the nine-way valve (41), and the third interface of the nine-way valve (41) is communicated with the inlet of the fourth water pump (24); The refrigerant circuit exchanges heat with the cooling liquid circuit through the condenser (11) and the evaporator (15).

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 heating mode, the radiator (13), the cold core (14) and the third water pump (23) are turned off, and the condenser (11), the warm core (12), the evaporator (15), the battery heat exchanger (16), the motor heat exchanger (17), the first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the second water pump (22) and the fourth water pump (24) are started; The sixth interface of the nine-way valve (41) is connected to the seventh interface, the ninth interface of the nine-way valve (41) is connected to the first interface, the first interface of the first three-way valve (31) is connected to the second interface and the third interface respectively, the second interface of the nine-way valve (41) is connected to the third interface, and the first interface of the second three-way valve (32) is connected to the second interface.

3. 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 (14) and the third water pump (23) are turned off, and the condenser (11), the warm core (12), the radiator (13), the evaporator (15), the battery heat exchanger (16), the motor heat exchanger (17), the first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the second water pump (22) and the fourth water pump (24) are started; The sixth interface of the nine-way valve (41) is communicated with the fourth interface, the fifth interface of the nine-way valve (41) is communicated with the eighth interface, the second interface of the nine-way valve (41) is communicated with the seventh interface, the ninth interface of the nine-way valve (41) is communicated with the first interface, and the first interface of the first three-way valve (31) is communicated with the second interface and the third interface respectively.

4. The indirect heat pump system according to claim 1, characterized in that: When the indirect heat pump system is in a dehumidification mode, the condenser (11), the warm core (12), the radiator (13), the cold core (14), the evaporator (15), the battery heat exchanger (16), the motor heat exchanger (17), the first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the second water pump (22), the third water pump (23) and the fourth water pump (24) are started; The sixth interface of the nine-way valve (41) is communicated with the seventh interface, the ninth interface of the nine-way valve (41) is communicated with the first interface, the first interface of the first three-way valve (31) is communicated with the second interface and the third interface respectively, the second interface of the nine-way valve (41) is communicated with the third interface and the fourth interface respectively, the fifth interface of the nine-way valve (41) is communicated with the eighth interface, and the first interface of the second three-way valve (32) is communicated with the second interface and the third interface respectively.

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 cooling mode, the warm core (12) and the second water pump (22) are turned off, and the condenser (11), the radiator (13), the cold core (14), the evaporator (15), the battery heat exchanger (16), the motor heat exchanger (17), the first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the third water pump (23) and the fourth water pump (24) are started; The sixth interface of the nine-way valve (41) is communicated with the seventh interface, the ninth interface of the nine-way valve (41) is communicated with the first interface, the first interface of the first three-way valve (31) is communicated with the third interface, the second interface of the nine-way valve (41) is communicated with the fourth interface, the fifth interface of the nine-way valve (41) is communicated with the eighth interface, and the first interface of the second three-way valve (32) is communicated with the second interface.

6. 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 warm core (12), the second three-way valve (32), the second water pump (22) and the fourth water pump (24) are closed, and the condenser (11), the radiator (13), the cold core (14), the evaporator (15), the battery heat exchanger (16), the motor heat exchanger (17), the first three-way valve (31), the first water pump (21) and the third water pump (23) are started; The second interface of the nine-way valve (41) is connected to the fourth interface, the fifth interface of the nine-way valve (41) is connected to the first interface, the first interface of the first three-way valve (31) is connected to the third interface, and the ninth interface of the nine-way valve (41) is connected to the seventh interface.

7. The indirect heat pump system according to any one of claims 1 to 6, characterized in that: The nine-way valve (41) comprises an eight-way valve and a third three-way valve, the third interface of the eight-way valve being connected to the inlet of the third three-way valve, so that the two outlets of the third three-way valve respectively become the third interface and the fourth interface of the nine-way valve (41).

8. The indirect heat pump system according to claim 7, characterized in that: The third three-way valve is a three-way proportional valve.

9. The indirect heat pump system according to any one of claims 1 to 6, characterized in that: The first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the second water pump (22), the third water pump (23) and the fourth water pump (24) are arranged in the middle of the indirect heat pump system, and the condenser (11), the warm core (12), the radiator (13), the cold core (14), the evaporator (15), the battery heat exchanger (16) and the motor heat exchanger (17) are arranged around the first three-way valve (31), the second three-way valve (32), the nine-way valve (41), the first water pump (21), the second water pump (22), the third water pump (23) and the fourth water pump (24) in sequence.

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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