Vehicle-mounted heat pump system

Abstract

The utility model belongs to the technical field of heat pumps, and discloses a vehicle-mounted heat pump system which comprises a first evaporator, a second evaporator, a compressor, a condenser, a throttling pressure reduction element, a motor cooler, an air cooling heat exchanger, a battery heat exchanger, a warm core, a cold core and a connecting valve set. A refrigerant outlet of the first evaporator and a refrigerant outlet of the second evaporator are both communicated with a refrigerant inlet of the condenser through the compressor, and a refrigerant outlet of the condenser is communicated with a refrigerant inlet of the first evaporator and a refrigerant inlet of the second evaporator through the throttling pressure reduction element. A cooling liquid inlet of the first evaporator, a cooling liquid outlet of the first evaporator, a cooling liquid inlet of the second evaporator, a cooling liquid outlet of the second evaporator, a cooling liquid inlet of the condenser, a cooling liquid outlet of the condenser, the motor cooler, the air cooling heat exchanger, the battery heat exchanger, the warm core and the cold core are integrated through a connecting valve set. And different working modes can be mutually switched.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a vehicle-mounted heat pump system. Background Art

[0002] Compared with traditional fuel vehicles, the thermal management system of new energy vehicles has more loops, such as electric drive cooling loop, battery heating loop, battery cooling loop, passenger compartment refrigeration loop and passenger compartment heating loop, etc. Each additional loop will lead to an increase in the number, cost and weight of vehicle parts.

[0003] The power consumption of new energy vehicles will increase as the weight of new energy vehicles increases, thereby reducing the driving range. Therefore, how to integrate loads such as motors, batteries, and passenger compartments while meeting the different cooling and heating requirements of the above loads is a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0004] The utility model aims to provide a vehicle-mounted heat pump system, the coolant circuit of which can realize the integration of multiple loads and the switching of multiple working modes.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The vehicle heat pump system includes a first evaporator, a second evaporator, a compressor, a condenser, a throttling and pressure reducing element, a connecting valve group, a motor cooler, an air-cooled heat exchanger, a battery heat exchanger, a warm core and a cold core, wherein:

[0007] The refrigerant outlet of the first evaporator and the refrigerant outlet of the second evaporator are both connected to the refrigerant inlet of the condenser through the compressor, and the refrigerant outlet of the condenser is respectively connected to the refrigerant inlet of the first evaporator and the refrigerant inlet of the second evaporator through the throttling and pressure reducing element;

[0008] The connecting valve group includes a five-way valve and a nine-way valve. The coolant inlet of the condenser is respectively connected to the outlet of the warm core and the second interface of the five-way valve, and the coolant outlet of the condenser is connected to the first interface of the nine-way valve; the inlet of the motor cooler is respectively connected to the outlet of the air-cooled heat exchanger and the ninth interface of the nine-way valve, and the outlet of the motor cooler is connected to the third interface of the five-way valve; the inlet of the air-cooled heat exchanger is connected to the eighth interface of the nine-way valve, and the outlet of the air-cooled heat exchanger is connected to the ninth interface of the nine-way valve; the inlet of the battery heat exchanger is respectively connected to the sixth interface of the nine-way valve and the first interface of the five-way valve, and the outlet of the battery heat exchanger is connected to the fifth interface of the five-way valve; The inlet of the warm core is communicated with the second interface of the nine-way valve, and the outlet of the warm core is communicated with the second interface of the five-way valve; the coolant inlet of the first evaporator is communicated with the outlet of the cold core, the coolant inlet of the second evaporator and the fourth interface of the five-way valve respectively, and the coolant outlet of the first evaporator is communicated with the fourth interface of the nine-way valve; the inlet of the cold core is communicated with the fifth interface of the nine-way valve, and the outlet of the cold core is communicated with the coolant inlet of the second evaporator and the fourth interface of the five-way valve respectively; the coolant inlet of the second evaporator is communicated with the fourth interface of the five-way valve, and the coolant outlet of the second evaporator is communicated with the seventh interface of the nine-way valve and the third interface of the nine-way valve respectively;

[0009] The fourth interface of the five-way valve is selectively connected with the third interface of the five-way valve and the fifth interface of the five-way valve, respectively, the first interface of the five-way valve, the second interface of the five-way valve and the fifth interface of the five-way valve are selectively connected with each other, and the first interface of the five-way valve, the second interface of the five-way valve and the third interface of the five-way valve are selectively connected with each other; the fourth interface of the nine-way valve is selectively connected with the third interface of the nine-way valve and the fifth interface of the nine-way valve, respectively, the seventh interface of the nine-way valve is selectively connected with the ninth interface of the nine-way valve, the eighth interface of the nine-way valve and the sixth interface of the nine-way valve, respectively, the ninth interface of the nine-way valve is selectively connected with the first interface of the nine-way valve and the second interface of the nine-way valve, respectively, the eighth interface of the nine-way valve is selectively connected with the first interface of the nine-way valve and the second interface of the nine-way valve, respectively, the sixth interface of the nine-way valve is selectively connected with the first interface of the nine-way valve and the second interface of the nine-way valve, respectively, and the first interface of the nine-way valve is selectively connected with the second interface of the nine-way valve.

[0010] Optionally, the vehicle-mounted heat pump system further includes a first water pump, the outlet of the first water pump being connected to the coolant inlet of the condenser, and the inlet of the first water pump being connected to the outlet of the warm core and the second interface of the five-way valve respectively.

[0011] Optionally, the vehicle-mounted heat pump system also includes a second water pump, the outlet of the second water pump is connected to the coolant inlet of the first evaporator, and the inlet of the second water pump is respectively connected to the outlet of the cold core, the coolant inlet of the second evaporator and the fourth interface of the five-way valve.

[0012] Optionally, the vehicle-mounted heat pump system further includes a third water pump, the outlet of the third water pump is connected to the inlet of the battery heat exchanger, and the inlet of the third water pump is respectively connected to the sixth interface of the nine-way valve and the first interface of the five-way valve.

[0013] Optionally, the vehicle-mounted heat pump system also includes a fourth water pump, the outlet of the fourth water pump is connected to the coolant inlet of the second evaporator, and the inlet of the fourth water pump is respectively connected to the fourth interface of the five-way valve, the coolant inlet of the first evaporator and the outlet of the cold core.

[0014] Optionally, when the vehicle heat pump system is in the first mode, the third interface of the five-way valve is connected to the second interface of the five-way valve, the fifth interface of the five-way valve is connected to the fourth interface of the five-way valve, the first interface of the nine-way valve is connected to the eighth interface of the nine-way valve, the seventh interface of the nine-way valve is connected to the sixth interface of the nine-way valve, and the fourth interface of the nine-way valve is connected to the fifth interface of the nine-way valve.

[0015] Optionally, when the vehicle heat pump system is in the second mode, the third interface of the five-way valve is connected to the second interface of the five-way valve, the fifth interface of the five-way valve is connected to the fourth interface of the five-way valve, the first interface of the nine-way valve is connected to the eighth interface of the nine-way valve, the fourth interface of the nine-way valve is connected to the third interface of the nine-way valve, and the seventh interface of the nine-way valve is connected to the sixth interface of the nine-way valve.

[0016] Optionally, when the vehicle heat pump system is in the third mode, the third interface of the five-way valve is connected to the fourth interface of the five-way valve, the fifth interface of the five-way valve is respectively connected to the first interface of the five-way valve and the second interface of the five-way valve, the fourth interface of the nine-way valve is connected to the third interface of the nine-way valve, the seventh interface of the nine-way valve is connected to the eighth interface of the nine-way valve, and the first interface of the nine-way valve is respectively connected to the second interface of the nine-way valve and the sixth interface of the nine-way valve.

[0017] Optionally, when the vehicle heat pump system is in the fourth mode, the third interface of the five-way valve is connected to the fourth interface of the five-way valve, the fifth interface of the five-way valve is connected to the first interface of the five-way valve and the second interface of the five-way valve respectively, the fourth interface of the nine-way valve is connected to the third interface of the nine-way valve, the seventh interface of the nine-way valve is connected to the ninth interface of the nine-way valve, and the first interface of the nine-way valve is connected to the second interface of the nine-way valve and the sixth interface of the nine-way valve respectively.

[0018] Optionally, when the vehicle heat pump system is in the fifth mode, the third interface of the five-way valve is connected to the fourth interface of the five-way valve, the first interface of the nine-way valve is connected to the second interface of the nine-way valve, the fourth interface of the nine-way valve is connected to the fifth interface of the nine-way valve, and the seventh interface of the nine-way valve is connected to the eighth interface of the nine-way valve.

[0019] Beneficial effects of the utility model:

[0020] The vehicle-mounted heat pump system provided by the utility model is provided with a five-way valve and a nine-way valve, thereby realizing the integration of the coolant end of the first evaporator, the coolant end of the second evaporator, the coolant end of the condenser, the motor cooler, the air-cooled heat exchanger, the battery heat exchanger, the warm core and the cold core. At the same time, the refrigerant end of the first evaporator and the refrigerant end of the second evaporator are respectively connected to the refrigerant end of the condenser. Under the coordinated action of the opening and closing of the five interfaces of the five-way valve and the opening and closing of the nine interfaces of the nine-way valve, the coolant circuit of the vehicle-mounted heat pump system has a variety of working modes and can switch between the multiple working modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a vehicle-mounted heat pump system provided by an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a coolant circuit in a first mode of a vehicle-mounted heat pump system provided by the utility model;

[0023] Figure 3 It is a schematic diagram of the coolant circuit in the second mode of the vehicle heat pump system provided by the utility model;

[0024] Figure 4 It is a schematic diagram of the coolant circuit in the third mode of the vehicle heat pump system provided by the utility model;

[0025] Figure 5 It is a schematic diagram of a coolant circuit in a fourth mode of the vehicle heat pump system provided by the utility model;

[0026] Figure 6 It is a schematic diagram of a coolant circuit in the fifth mode of the vehicle heat pump system provided by the utility model.

[0027] In the figure:

[0028] 110, first evaporator; 120, second evaporator; 200, condenser; 300, motor cooler; 400, air-cooled heat exchanger; 500, battery heat exchanger; 610, warm core; 620, cold core; 710, five-way valve; 720, nine-way valve; 810, first water pump; 820, second water pump; 830, third water pump; 840, fourth water pump. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions 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.

[0033] This embodiment provides a vehicle-mounted heat pump system, whose coolant circuit can realize both the integration of multiple loads and the switching of multiple working modes.

[0034] Specifically, Figure 1 As shown, the vehicle-mounted heat pump system includes a first evaporator 110, a second evaporator 120, a compressor (not shown in the figure), a condenser 200, a throttling and pressure reducing element (such as a throttle valve, etc., the throttling and pressure reducing element is not shown in the figure), a connecting valve group, a motor cooler 300, an air-cooled heat exchanger 400, a battery heat exchanger 500, a warm core 610 and a cold core 620. The motor cooler 300 is used to cool the motor of the vehicle, the battery heat exchanger 500 is used to cool or heat the battery of the vehicle, the cold core 620 and the warm core 610 are both located in the air-conditioning box of the vehicle, the cold core 620 is used to cool the air in the air-conditioning box, and the warm core 610 is used to heat the air in the air-conditioning box. The air-conditioning box is connected to the cabin of the vehicle through an air duct to achieve cooling and heating effects in the cabin.

[0035] The first evaporator 110 and the second evaporator 120 are both water-cooled evaporators, and the condenser 200 is a water-cooled condenser. The refrigerant outlet of the first evaporator 110 and the refrigerant outlet of the second evaporator 120 are both connected to the refrigerant inlet of the condenser 200 through a compressor, and the refrigerant outlet of the condenser 200 is respectively connected to the refrigerant inlet of the first evaporator 110 and the refrigerant inlet of the second evaporator 120 through a throttling and pressure-reducing element. The refrigerant end of the first evaporator 110, the refrigerant end of the second evaporator 120, the compressor, the refrigerant end of the condenser 200 and the throttling and pressure-reducing element constitute a refrigerant circuit of the vehicle-mounted heat pump system.

[0036] The connecting valve group includes a five-way valve 710 and a nine-way valve 720. The coolant inlet of the condenser 200 is respectively connected to the outlet of the warm core 610 and the second interface of the five-way valve 710, and the coolant outlet of the condenser 200 is connected to the first interface of the nine-way valve 720; the inlet of the motor cooler 300 is respectively connected to the outlet of the air-cooled heat exchanger 400 and the ninth interface of the nine-way valve 720, and the outlet of the motor cooler 300 is connected to the third interface of the five-way valve 710; the inlet of the air-cooled heat exchanger 400 is connected to the eighth interface of the nine-way valve 720, and the outlet of the air-cooled heat exchanger 400 is connected to the ninth interface of the nine-way valve 720; the inlet of the battery heat exchanger 500 is respectively connected to the sixth interface of the nine-way valve 720 and the first interface of the five-way valve 710, and the outlet of the battery heat exchanger 500 is connected to the fifth interface of the five-way valve 710. The inlet of the warm core 610 is connected to the second interface of the nine-way valve 720, and the outlet of the warm core 610 is connected to the second interface of the five-way valve 710; the coolant inlet of the first evaporator 110 is respectively connected to the outlet of the cold core 620, the coolant inlet of the second evaporator 120 and the fourth interface of the five-way valve 710, and the coolant outlet of the first evaporator 110 is connected to the fourth interface of the nine-way valve 720; the inlet of the cold core 620 is connected to the fifth interface of the nine-way valve 720, and the outlet of the cold core 620 is respectively connected to the coolant inlet of the second evaporator 120 and the fourth interface of the five-way valve 710; the coolant inlet of the second evaporator 120 is connected to the fourth interface of the five-way valve 710, and the coolant outlet of the second evaporator 120 is respectively connected to the seventh interface of the nine-way valve 720 and the third interface of the nine-way valve 720.

[0037] The fourth interface of the five-way valve 710 is selectively connected to the third interface of the five-way valve 710 and the fifth interface of the five-way valve 710, respectively; the first interface of the five-way valve 710, the second interface of the five-way valve 710 and the fifth interface of the five-way valve 710 are selectively connected to each other; the first interface of the five-way valve 710, the second interface of the five-way valve 710 and the third interface of the five-way valve 710 are selectively connected to each other; the fourth interface of the nine-way valve 720 is selectively connected to the third interface of the nine-way valve 720 and the fifth interface of the nine-way valve 720, respectively; the seventh interface of the nine-way valve 720 is selectively connected to the nine-way valve 720, respectively. The ninth interface of the nine-way valve 720, the eighth interface of the nine-way valve 720 and the sixth interface of the nine-way valve 720 are selectively connected, the ninth interface of the nine-way valve 720 is selectively connected with the first interface of the nine-way valve 720 and the second interface of the nine-way valve 720 respectively, the eighth interface of the nine-way valve 720 is selectively connected with the first interface of the nine-way valve 720 and the second interface of the nine-way valve 720 respectively, the sixth interface of the nine-way valve 720 is selectively connected with the first interface of the nine-way valve 720 and the second interface of the nine-way valve 720 respectively, and the first interface of the nine-way valve 720 is selectively connected with the second interface of the nine-way valve 720.

[0038] Based on the above design, the vehicle-mounted heat pump system is provided with a five-way valve 710 and a nine-way valve 720, thereby realizing the integration of the coolant end of the first evaporator 110, the coolant end of the second evaporator 120, the coolant end of the condenser 200, the motor cooler 300, the air-cooled heat exchanger 400, the battery heat exchanger 500, the warm core 610 and the cold core 620. At the same time, the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 are respectively connected to the refrigerant end of the condenser 200. With the opening and closing of the five interfaces of the five-way valve 710 and the opening and closing of the nine interfaces of the nine-way valve 720, the coolant circuit of the vehicle-mounted heat pump system has multiple working modes and can switch between multiple working modes.

[0039] Alternatively, if Figure 1 As shown, the vehicle-mounted heat pump system also includes a first water pump 810, the outlet of the first water pump 810 is connected to the coolant inlet of the condenser 200, and the inlet of the first water pump 810 is respectively connected to the outlet of the warm core 610 and the second interface of the five-way valve 710 to increase the flow rate and flow velocity of the coolant in and out of the condenser 200.

[0040] Alternatively, if Figure 1 As shown, the vehicle-mounted heat pump system also includes a second water pump 820, the outlet of the second water pump 820 is connected to the coolant inlet of the first evaporator 110, and the inlet of the second water pump 820 is respectively connected to the outlet of the cold core 620, the coolant inlet of the second evaporator 120 and the fourth interface of the five-way valve 710 to increase the flow rate and flow rate of the coolant entering and exiting the first evaporator 110.

[0041] Alternatively, if Figure 1 As shown, the vehicle-mounted heat pump system also includes a third water pump 830, the outlet of the third water pump 830 is connected to the inlet of the battery heat exchanger 500, and the inlet of the third water pump 830 is respectively connected to the sixth interface of the nine-way valve 720 and the first interface of the five-way valve 710 to increase the flow rate and flow velocity of the coolant entering and exiting the battery heat exchanger 500.

[0042] Alternatively, if Figure 1 As shown, the vehicle-mounted heat pump system also includes a fourth water pump 840, the outlet of the fourth water pump 840 is connected to the coolant inlet of the second evaporator 120, and the inlet of the fourth water pump 840 is respectively connected to the fourth interface of the five-way valve 710, the coolant inlet of the first evaporator 110 and the outlet of the cold core 620 to increase the flow rate and flow velocity of the coolant entering and exiting the second evaporator 120.

[0043] Alternatively, if Figure 1 and Figure 2 As shown, when the vehicle heat pump system is in the first mode, the third interface of the five-way valve 710 is connected to the second interface of the five-way valve 710, the fifth interface of the five-way valve 710 is connected to the fourth interface of the five-way valve 710, the first interface of the nine-way valve 720 is connected to the eighth interface of the nine-way valve 720, the seventh interface of the nine-way valve 720 is connected to the sixth interface of the nine-way valve 720, and the fourth interface of the nine-way valve 720 is connected to the fifth interface of the nine-way valve 720.

[0044] When the vehicle heat pump system is in the first mode, the refrigerant circuit: the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant end of the compressor and the condenser 200 in turn. After the refrigerant releases heat to the coolant in the condenser 200, it enters the throttling and pressure reduction element, and then enters the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0045] When the vehicle heat pump system is in the first mode, the coolant circuit is divided into three branches: the coolant absorbs the heat emitted by the motor in the motor cooler 300 to cool the motor, and then the coolant enters the condenser 200, absorbs the heat dissipated by the refrigerant in the condenser 200, and then enters the air-cooled heat exchanger 400. After the coolant dissipates heat to the air in the air-cooled heat exchanger 400, it enters the motor cooler 300 again to absorb heat, forming the first branch of the coolant. Secondly, the coolant absorbs the heat emitted by the battery in the battery heat exchanger 500 to cool the battery, and then the coolant enters the second evaporator 120, dissipates heat to the refrigerant in the second evaporator 120, and then the coolant enters the battery heat exchanger 500 again, forming the second branch of the coolant. Again, the coolant dissipates heat to the refrigerant in the first evaporator 110, and then the coolant enters the cold core 620, absorbs the heat of the air in the air conditioner, and then enters the coolant inlet of the first evaporator 110, forming a third branch of the coolant, and the low-temperature air in the air conditioner enters the cabin through the air duct to achieve a cooling effect on the cabin. It can be seen that when the vehicle heat pump system is in the first mode, the motor, battery and cabin can be cooled at the same time.

[0046] Alternatively, if Figure 1 and Figure 3 As shown, when the vehicle heat pump system is in the second mode, the third interface of the five-way valve 710 is connected to the second interface of the five-way valve 710, the fifth interface of the five-way valve 710 is connected to the fourth interface of the five-way valve 710, the first interface of the nine-way valve 720 is connected to the eighth interface of the nine-way valve 720, the fourth interface of the nine-way valve 720 is connected to the third interface of the nine-way valve 720, and the seventh interface of the nine-way valve 720 is connected to the sixth interface of the nine-way valve 720.

[0047] When the vehicle heat pump system is in the second mode, the refrigerant circuit: the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant end of the compressor and the condenser 200 in turn, and the refrigerant releases heat to the coolant in the condenser 200 and enters the throttling and pressure reduction element, and then enters the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0048] When the vehicle heat pump system is in the second mode, the coolant circuit is divided into two branches: the coolant absorbs the heat generated by the motor in the motor cooler 300 to cool the motor, and then the coolant enters the condenser 200, absorbs the heat dissipated by the refrigerant in the condenser 200, and then enters the air-cooled heat exchanger 400. After the coolant dissipates heat to the air in the air-cooled heat exchanger 400, it enters the motor cooler 300 again to absorb heat, forming the first branch of the coolant. Secondly, the coolant absorbs the heat generated by the battery in the battery heat exchanger 500 to cool the battery. The coolant discharged from the battery heat exchanger 500 enters the first evaporator 110 and the second evaporator 120 respectively. The coolant in the first evaporator 110 dissipates heat to the refrigerant in the first evaporator 110, and the coolant in the second evaporator 120 dissipates heat to the refrigerant in the second evaporator 120. The coolant discharged from the first evaporator 110 merges with the coolant discharged from the second evaporator 120, and then enters the battery heat exchanger 500 again to form a second branch of the coolant.

[0049] When the vehicle heat pump system is in the second mode, the battery and the motor can be cooled. When the battery is rapidly charged, a large amount of heat is dissipated, and the battery needs to be cooled quickly. Therefore, in the second mode, the coolant end of the first evaporator 110 and the coolant end of the second evaporator 120 are opened at the same time, and the coolant discharged from the first evaporator 110 and the coolant discharged from the second evaporator 120 both enter the battery heat exchanger 500 for heat exchange, so that the coolant entering the battery heat exchanger 500 has sufficient coldness, which is convenient for rapid cooling of the rapidly charged battery.

[0050] Alternatively, if Figure 1 and Figure 4 As shown, when the vehicle heat pump system is in the third mode, the third interface of the five-way valve 710 is connected to the fourth interface of the five-way valve 710, the fifth interface of the five-way valve 710 is connected to the first interface of the five-way valve 710 and the second interface of the five-way valve 710 respectively, the fourth interface of the nine-way valve 720 is connected to the third interface of the nine-way valve 720, the seventh interface of the nine-way valve 720 is connected to the eighth interface of the nine-way valve 720, and the first interface of the nine-way valve 720 is connected to the second interface of the nine-way valve 720 and the sixth interface of the nine-way valve 720 respectively.

[0051] When the vehicle heat pump system is in the third mode, the refrigerant circuit: the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant end of the compressor and the condenser 200 in turn, the refrigerant releases heat to the coolant in the condenser 200 and enters the throttling and pressure reduction element, and then enters the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0052] When the vehicle heat pump system is in the third mode, the coolant circuit is divided into two branches: the coolant discharged from the battery heat exchanger 500 is divided into two branches, one of which returns to the battery heat exchanger 500, and the other coolant merges with the coolant discharged from the warm core 610 and enters the condenser 200. The coolant absorbs the heat of the refrigerant in the condenser 200, and then divides into two branches, one of which enters the warm core 610. This part of the coolant dissipates heat to the air in the air-conditioning box in the warm core 610, and the other coolant enters the battery heat exchanger 500 to heat the battery, thereby forming a first branch of the coolant. Secondly, the coolant absorbs the heat generated by the motor in the motor cooler 300 to cool the motor, and then the coolant enters the first evaporator 110 and the second evaporator 120 respectively. The coolant in the first evaporator 110 dissipates heat to the refrigerant in the first evaporator 110, and the coolant in the second evaporator 120 dissipates heat to the refrigerant in the second evaporator 120. The coolant discharged from the first evaporator 110 merges with the coolant discharged from the second evaporator 120, and then enters the air-cooled heat exchanger 400. After absorbing heat from the air in the air-cooled heat exchanger 400, the coolant enters the motor cooler 300 again to absorb heat, forming a second branch of the coolant.

[0053] When the vehicle heat pump system is in the third mode, the cabin and the battery can be heated and the motor can be cooled. In the third mode, the coolant end of the first evaporator 110 and the coolant end of the second evaporator 120 are both connected to the air-cooled heat exchanger 400, and the coolant dissipates heat to the refrigerant in the first evaporator 110 and the second evaporator 120, respectively, so that the temperature of the coolant entering the air-cooled heat exchanger 400 is lower than the ambient temperature. In the air-cooled heat exchanger 400, the coolant absorbs heat from the environment. At the same time, the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120, respectively, so that the refrigerant entering the condenser 200 can transfer enough heat to the coolant in the condenser 200, thereby ensuring the heat supply of the coolant in the warm core 610 to the air in the air conditioning box, and the heat supply of the coolant in the battery heat exchanger 500 to the battery.

[0054] Alternatively, if Figure 1 and Figure 5 As shown, when the vehicle heat pump system is in the fourth mode, the third interface of the five-way valve 710 is connected to the fourth interface of the five-way valve 710, the fifth interface of the five-way valve 710 is connected to the first interface of the five-way valve 710 and the second interface of the five-way valve 710 respectively, the fourth interface of the nine-way valve 720 is connected to the third interface of the nine-way valve 720, the seventh interface of the nine-way valve 720 is connected to the ninth interface of the nine-way valve 720, and the first interface of the nine-way valve 720 is connected to the second interface of the nine-way valve 720 and the sixth interface of the nine-way valve 720 respectively.

[0055] When the vehicle heat pump system is in the fourth mode, the refrigerant circuit: the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant end of the compressor and the condenser 200 in turn, the refrigerant releases heat to the coolant in the condenser 200 and enters the throttling and pressure reducing element, and then enters the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0056] When the vehicle heat pump system is in the fourth mode, the coolant circuit is divided into two branches: the coolant discharged from the battery heat exchanger 500 is divided into two branches, one branch returns to the battery heat exchanger 500, and the other branch of coolant merges with the coolant discharged from the warm core 610 and enters the condenser 200. The coolant absorbs the heat of the refrigerant in the condenser 200, and then divides into two branches, one of which enters the warm core 610. This part of the coolant dissipates heat to the air in the air-conditioning box in the warm core 610, and the other branch of coolant enters the battery heat exchanger 500 to heat the battery, thereby forming a first branch of the coolant. Secondly, the coolant absorbs the heat generated by the motor in the motor cooler 300 to cool the motor, and then the coolant enters the first evaporator 110 and the second evaporator 120 respectively. The coolant in the first evaporator 110 dissipates heat to the refrigerant in the first evaporator 110, and the coolant in the second evaporator 120 dissipates heat to the refrigerant in the second evaporator 120. The coolant discharged from the first evaporator 110 merges with the coolant discharged from the second evaporator 120, and then enters the motor cooler 300 again to absorb heat, forming a second branch of the coolant.

[0057] When the vehicle heat pump system is in the fourth mode, the motor can be cooled and the residual heat of the motor can be used to heat the cabin and the battery. Specifically, in the fourth mode, the coolant end of the first evaporator 110 and the coolant end of the second evaporator 120 are not connected to the air-cooled heat exchanger 400, and the coolant end of the first evaporator 110 and the coolant end of the second evaporator 120 are both connected to the motor cooler 300. The coolant absorbs the heat of the motor in the motor cooler 300, and then transfers the heat to the refrigerant in the first evaporator 110 and the second evaporator 120 respectively. The refrigerant transfers part of the heat to the coolant in the condenser 200, and then the coolant brings the part of the heat to the warm core 610 and the battery heat exchanger 500 for heat transfer. It can be seen that in the fourth mode, the heat dissipated by the motor is recovered, and the part of the heat is used for cabin heating and battery heating, thereby achieving the effect of motor waste heat recovery.

[0058] Alternatively, if Figure 1 and Figure 6As shown, when the vehicle heat pump system is in the fifth mode, the third interface of the five-way valve 710 is connected to the fourth interface of the five-way valve 710, the first interface of the nine-way valve 720 is connected to the second interface of the nine-way valve 720, the fourth interface of the nine-way valve 720 is connected to the fifth interface of the nine-way valve 720, and the seventh interface of the nine-way valve 720 is connected to the eighth interface of the nine-way valve 720.

[0059] When the vehicle heat pump system is in the fifth mode, the refrigerant circuit: the refrigerant absorbs the heat of the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant end of the compressor and the condenser 200 in turn, and the refrigerant releases heat to the coolant in the condenser 200 and enters the throttling and pressure reducing element, and then enters the refrigerant end of the first evaporator 110 and the refrigerant end of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0060] When the vehicle heat pump system is in the fifth mode, the coolant circuit is divided into three branches: after the coolant dissipates heat in the first evaporator 110, it enters the cold core 620 to absorb the heat of the air in the air conditioning box, and then enters the first evaporator 110 to form the first branch of the coolant. Secondly, the coolant absorbs the heat of the refrigerant in the condenser 200, and then enters the warm core 610, where the coolant dissipates heat to the air in the air conditioning box, and then enters the coolant inlet of the condenser 200 to form the second branch of the coolant. Thirdly, the coolant absorbs the heat generated by the motor in the motor cooler 300 to cool the motor, and then the coolant enters the second evaporator 120 to dissipate heat to the refrigerant, and then the coolant enters the air-cooled heat exchanger 400, and the coolant dissipates heat to the air in the air-cooled heat exchanger 400 and then enters the motor cooler 300 to absorb heat again, forming the third branch of the coolant. When the vehicle heat pump system is in the fifth mode, the motor can be cooled, and in the fifth mode, the coolant in the warm core 610 and the coolant in the cold core 620 simultaneously exchange heat with the air in the air-conditioning box, thereby achieving the effect of dehumidifying the air in the air-conditioning box and the cabin.

[0061] It should be noted that the specific structures of the five-way valve 710 and the nine-way valve 720 in this embodiment are common structures in the art and will not be described in detail here.

[0062] 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. A vehicle-mounted heat pump system, characterized in that: The invention comprises a first evaporator (110), a second evaporator (120), a compressor, a condenser (200), a throttling and pressure reducing element, a connecting valve group, a motor cooler (300), an air-cooled heat exchanger (400), a battery heat exchanger (500), a warm core (610) and a cold core (620), wherein: The refrigerant outlet of the first evaporator (110) and the refrigerant outlet of the second evaporator (120) are both connected to the refrigerant inlet of the condenser (200) through the compressor, and the refrigerant outlet of the condenser (200) is respectively connected to the refrigerant inlet of the first evaporator (110) and the refrigerant inlet of the second evaporator (120) through the throttling and pressure-reducing element; The connecting valve group includes a five-way valve (710) and a nine-way valve (720); the coolant inlet of the condenser (200) is respectively connected to the outlet of the warm core (610) and the second interface of the five-way valve (710); the coolant outlet of the condenser (200) is respectively connected to the first interface of the nine-way valve (720); the inlet of the motor cooler (300) is respectively connected to the outlet of the air-cooled heat exchanger (400) and the ninth interface of the nine-way valve (720); ) is communicated with the third interface of the five-way valve (710); the inlet of the air-cooled heat exchanger (400) is communicated with the eighth interface of the nine-way valve (720), and the outlet of the air-cooled heat exchanger (400) is communicated with the ninth interface of the nine-way valve (720); the inlet of the battery heat exchanger (500) is communicated with the sixth interface of the nine-way valve (720) and the first interface of the five-way valve (710), respectively, and the outlet of the battery heat exchanger (500) is communicated with the fifth interface of the five-way valve (710). The inlet of the warm core (610) is connected to the second interface of the nine-way valve (720), and the outlet of the warm core (610) is connected to the second interface of the five-way valve (710); the coolant inlet of the first evaporator (110) is respectively connected to the outlet of the cold core (620), the coolant inlet of the second evaporator (120) and the fourth interface of the five-way valve (710), and the coolant outlet of the first evaporator (110) is connected to the fourth interface of the nine-way valve (720); The inlet of the cold core (620) is communicated with the fifth interface of the nine-way valve (720), and the outlet of the cold core (620) is communicated with the coolant inlet of the second evaporator (120) and the fourth interface of the five-way valve (710) respectively; the coolant inlet of the second evaporator (120) is communicated with the fourth interface of the five-way valve (710), and the coolant outlet of the second evaporator (120) is communicated with the seventh interface of the nine-way valve (720) and the third interface of the nine-way valve (720) respectively; The fourth interface of the five-way valve (710) is selectively connected to the third interface of the five-way valve (710) and the fifth interface of the five-way valve (710), respectively; the first interface of the five-way valve (710), the second interface of the five-way valve (710) and the fifth interface of the five-way valve (710) are selectively connected to each other; the first interface of the five-way valve (710), the second interface of the five-way valve (710) and the third interface of the five-way valve (710) are selectively connected to each other; the fourth interface of the nine-way valve (720) is selectively connected to the third interface of the nine-way valve (720) and the fifth interface of the nine-way valve (720), respectively; the seventh interface of the nine-way valve (720) is selectively connected to the nine-way valve (720), respectively. 0), the eighth interface of the nine-way valve (720) and the sixth interface of the nine-way valve (720), the ninth interface of the nine-way valve (720) is selectively connected to the first interface of the nine-way valve (720) and the second interface of the nine-way valve (720), respectively, the eighth interface of the nine-way valve (720) is selectively connected to the first interface of the nine-way valve (720) and the second interface of the nine-way valve (720), respectively, the sixth interface of the nine-way valve (720) is selectively connected to the first interface of the nine-way valve (720) and the second interface of the nine-way valve (720), respectively, and the first interface of the nine-way valve (720) is selectively connected to the second interface of the nine-way valve (720).

2. The vehicle-mounted heat pump system according to claim 1, characterized in that: The vehicle-mounted heat pump system also includes a first water pump (810), the outlet of the first water pump (810) is connected to the coolant inlet of the condenser (200), and the inlet of the first water pump (810) is respectively connected to the outlet of the warm core (610) and the second interface of the five-way valve (710).

3. The vehicle-mounted heat pump system according to claim 1, characterized in that: The vehicle-mounted heat pump system also includes a second water pump (820), the outlet of the second water pump (820) is connected to the coolant inlet of the first evaporator (110), and the inlet of the second water pump (820) is respectively connected to the outlet of the cold core (620), the coolant inlet of the second evaporator (120) and the fourth interface of the five-way valve (710).

4. The vehicle-mounted heat pump system according to claim 1, characterized in that: The vehicle-mounted heat pump system also includes a third water pump (830), the outlet of the third water pump (830) is connected to the inlet of the battery heat exchanger (500), and the inlet of the third water pump (830) is respectively connected to the sixth interface of the nine-way valve (720) and the first interface of the five-way valve (710).

5. The vehicle-mounted heat pump system according to claim 1, characterized in that: The vehicle-mounted heat pump system also includes a fourth water pump (840), the outlet of the fourth water pump (840) is connected to the coolant inlet of the second evaporator (120), and the inlet of the fourth water pump (840) is respectively connected to the fourth interface of the five-way valve (710), the coolant inlet of the first evaporator (110) and the outlet of the cold core (620).

6. The vehicle-mounted heat pump system according to any one of claims 1 to 5, characterized in that: When the vehicle-mounted heat pump system is in the first mode, the third interface of the five-way valve (710) is connected to the second interface of the five-way valve (710), the fifth interface of the five-way valve (710) is connected to the fourth interface of the five-way valve (710), the first interface of the nine-way valve (720) is connected to the eighth interface of the nine-way valve (720), the seventh interface of the nine-way valve (720) is connected to the sixth interface of the nine-way valve (720), and the fourth interface of the nine-way valve (720) is connected to the fifth interface of the nine-way valve (720).

7. The vehicle-mounted heat pump system according to any one of claims 1 to 5, characterized in that: When the vehicle-mounted heat pump system is in the second mode, the third interface of the five-way valve (710) is communicated with the second interface of the five-way valve (710), the fifth interface of the five-way valve (710) is communicated with the fourth interface of the five-way valve (710), the first interface of the nine-way valve (720) is communicated with the eighth interface of the nine-way valve (720), the fourth interface of the nine-way valve (720) is communicated with the third interface of the nine-way valve (720), and the seventh interface of the nine-way valve (720) is communicated with the sixth interface of the nine-way valve (720).

8. The vehicle-mounted heat pump system according to any one of claims 1 to 5, characterized in that: When the vehicle-mounted heat pump system is in the third mode, the third interface of the five-way valve (710) is communicated with the fourth interface of the five-way valve (710), the fifth interface of the five-way valve (710) is communicated with the first interface of the five-way valve (710) and the second interface of the five-way valve (710), respectively, the fourth interface of the nine-way valve (720) is communicated with the third interface of the nine-way valve (720), the seventh interface of the nine-way valve (720) is communicated with the eighth interface of the nine-way valve (720), and the first interface of the nine-way valve (720) is communicated with the second interface of the nine-way valve (720) and the sixth interface of the nine-way valve (720), respectively.

9. The vehicle-mounted heat pump system according to any one of claims 1 to 5, characterized in that: When the vehicle-mounted heat pump system is in the fourth mode, the third interface of the five-way valve (710) is communicated with the fourth interface of the five-way valve (710), the fifth interface of the five-way valve (710) is communicated with the first interface of the five-way valve (710) and the second interface of the five-way valve (710), respectively, the fourth interface of the nine-way valve (720) is communicated with the third interface of the nine-way valve (720), the seventh interface of the nine-way valve (720) is communicated with the ninth interface of the nine-way valve (720), and the first interface of the nine-way valve (720) is communicated with the second interface of the nine-way valve (720) and the sixth interface of the nine-way valve (720), respectively.

10. The vehicle-mounted heat pump system according to any one of claims 1 to 5, characterized in that: When the vehicle-mounted heat pump system is in the fifth mode, the third interface of the five-way valve (710) is connected to the fourth interface of the five-way valve (710), the first interface of the nine-way valve (720) is connected to the second interface of the nine-way valve (720), the fourth interface of the nine-way valve (720) is connected to the fifth interface of the nine-way valve (720), and the seventh interface of the nine-way valve (720) is connected to the eighth interface of the nine-way valve (720).

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