Indirect heat pump system

Abstract

The utility model belongs to the technical field of heat pumps, and discloses an indirect type 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, so that the use requirements of the heat management system of the new energy automobile are met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an indirect heat pump system. Background Art

[0002] At present, indirect heat pump systems are increasingly used in the field of new energy vehicles. The thermal management system of new energy vehicles has the characteristics of multiple loads and multiple working modes (for example, the power battery has both cooling and heating requirements, and the car's motor only has cooling requirements), which makes the coolant circuit design of the indirect heat pump system very complicated.

[0003] Therefore, there is an urgent need to propose an indirect heat pump system so that its coolant circuit can not only integrate multiple loads but also switch between multiple working modes. Utility Model Content

[0004] The utility model aims to provide an indirect heat pump system, the cooling liquid 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] An indirect 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 first three-way valve, a first five-way valve, a second three-way valve and a second five-way valve. The first interface of the first three-way valve is connected to the coolant outlet of the first evaporator, the second interface of the first three-way valve is connected to the coolant outlet of the second evaporator, and the third interface of the first three-way valve is connected to the inlet of the cold core; the fourth interface of the first five-way valve is selectively connected to the first interface of the first five-way valve, the third interface of the first five-way valve and the fifth interface of the first five-way valve, respectively, and the second interface of the first five-way valve is selectively connected to the first interface of the first five-way valve and the fifth interface of the first five-way valve, respectively; the first interface of the first five-way valve is connected to the outlet of the warm core and the coolant inlet of the condenser, respectively, the second interface of the first five-way valve is connected to the outlet of the motor cooler, the third interface of the first five-way valve is connected to the inlet of the battery heat exchanger, the fourth interface of the first five-way valve is connected to the outlet of the battery heat exchanger, and the fifth interface of the first five-way valve is connected to the coolant inlet of the second evaporator, the first The coolant inlet of the evaporator and the outlet of the cold core are connected; the first interface of the second three-way valve is connected to the coolant outlet of the condenser, and the third interface of the second three-way valve is connected to the inlet of the warm core; the first interface of the second five-way valve is selectively connected to the second interface of the second five-way valve, the third interface of the second five-way valve and the fifth interface of the second five-way valve, respectively, and the fourth interface of the second five-way valve is selectively connected to the second interface of the second five-way valve, the third interface of the second five-way valve and the fifth interface of the second five-way valve, respectively; the first interface of the second five-way valve is connected to the second interface of the second three-way valve, and the second interface of the second five-way valve is connected to the inlet of the motor cooler and the outlet of the air-cooled heat exchanger, respectively, the third interface of the second five-way valve is connected to the inlet of the air-cooled heat exchanger, the fourth interface of the second five-way valve is connected to the coolant outlet of the second evaporator and the second interface of the first three-way valve, respectively, and the fifth interface of the second five-way valve is connected to the inlet of the battery heat exchanger and the third interface of the first five-way valve, respectively.

[0009] Optionally, the indirect heat pump system further includes a first water pump, the outlet of the first water pump is connected to the coolant inlet of the condenser, and the inlet of the first water pump is respectively connected to the outlet of the warm core and the first interface of the first five-way valve.

[0010] Optionally, the indirect 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 fifth interface of the first five-way valve.

[0011] Optionally, the indirect 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 third interface of the first five-way valve and the fifth interface of the second five-way valve.

[0012] Optionally, the indirect 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 coolant inlet of the first evaporator, the outlet of the cold core and the fifth interface of the first five-way valve.

[0013] Optionally, when the indirect heat pump system is in the first mode, the first interface of the first three-way valve is connected to the third interface of the first three-way valve, the second interface of the first five-way valve is connected to the first interface of the first five-way valve, the fourth interface of the first five-way valve is connected to the fifth interface of the first five-way valve, the first interface of the second three-way valve is connected to the second interface of the second three-way valve, the first interface of the second five-way valve is connected to the third interface of the second five-way valve, and the fourth interface of the second five-way valve is connected to the fifth interface of the second five-way valve.

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

[0015] Optionally, when the indirect heat pump system is in the third mode, the first interface of the first three-way valve is connected to the second interface of the first three-way valve, the second interface of the first five-way valve is connected to the fifth interface of the first five-way valve, the fourth interface of the first five-way valve is connected to the first interface of the first five-way valve and the third interface of the first five-way valve respectively, the first interface of the second three-way valve is connected to the second interface of the second three-way valve and the third interface of the second three-way valve respectively, the first interface of the second five-way valve is connected to the fifth interface of the second five-way valve, and the fourth interface of the second five-way valve is connected to the third interface of the second five-way valve.

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

[0017] Optionally, when the indirect heat pump system is in the fifth mode, the first interface of the first three-way valve is connected to the third interface of the first three-way valve, the second interface of the first five-way valve is connected to the fifth interface of the first five-way valve, the fourth interface of the first five-way valve is connected to the third interface of the first five-way valve, the first interface of the second three-way valve is connected to the third interface of the second three-way valve, and the fourth interface of the second five-way valve is connected to the third interface of the second five-way valve.

[0018] Beneficial effects of the utility model:

[0019] The indirect heat pump system provided by the utility model realizes 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 by arranging the first three-way valve, the first five-way valve, the second three-way valve and the second five-way valve. The refrigerant end of the first evaporator and the refrigerant end of the second evaporator are respectively connected with the refrigerant end of the condenser, and at the same time, the opening and closing of each interface of the first three-way valve, the first five-way valve, the second three-way valve and the second five-way valve are coordinated, so that the coolant circuit of the indirect heat pump system has multiple working modes and can switch between the multiple working modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an indirect heat pump system provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a coolant circuit in a first mode of an indirect heat pump system provided by the utility model;

[0022] Figure 3 It is a schematic diagram of a coolant circuit in the second mode of the indirect heat pump system provided by the utility model;

[0023] Figure 4 It is a schematic diagram of a coolant circuit in the third mode of the indirect heat pump system provided by the utility model;

[0024] Figure 5 It is a schematic diagram of a coolant circuit in a fourth mode of an indirect heat pump system provided by the utility model;

[0025] Figure 6 This is a schematic diagram of a coolant circuit in the fifth mode of the indirect heat pump system provided by the utility model.

[0026] In the figure:

[0027] 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, first three-way valve; 720, first five-way valve; 730, second three-way valve; 740, second five-way valve; 810, first water pump; 820, second water pump; 830, third water pump; 840, fourth water pump. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This embodiment provides an indirect heat pump system, whose coolant circuit can realize both the integration of multiple loads and the switching of multiple working modes.

[0033] Specifically, Figure 1 As shown, the indirect 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 car, the battery heat exchanger 500 is used to cool or heat the battery of the car, the cold core 620 and the warm core 610 are both located in the air conditioning box of the car, 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 car cabin through the air duct to achieve the cooling and heating effects in the cabin.

[0034] 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 indirect heat pump system.

[0035] 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 serve as eight loads at the coolant end of the indirect heat pump system and are integrated by connecting a valve group.

[0036] The connecting valve group includes a first three-way valve 710, a first five-way valve 720, a second three-way valve 730 and a second five-way valve 740. The first interface of the first three-way valve 710 is connected to the coolant outlet of the first evaporator 110, the second interface of the first three-way valve 710 is connected to the coolant outlet of the second evaporator 120, and the third interface of the first three-way valve 710 is connected to the inlet of the cold core 620; the fourth interface of the first five-way valve 720 is selectively connected to the first interface of the first five-way valve 720, the third interface of the first five-way valve 720 and the fifth interface of the first five-way valve 720 respectively. The second interface of the first five-way valve 720 is selectively connected to the first interface of the first five-way valve 720 and the fifth interface of the first five-way valve 720 respectively; the first interface of the first five-way valve 720 is connected to the outlet of the warm core 610 and the coolant inlet of the condenser 200 respectively, the second interface of the first five-way valve 720 is connected to the outlet of the motor cooler 300, the third interface of the first five-way valve 720 is connected to the inlet of the battery heat exchanger 500, the fourth interface of the first five-way valve 720 is connected to the outlet of the battery heat exchanger 500, and the fifth interface of the first five-way valve 720 is connected to the coolant inlet of the second evaporator 120, the coolant inlet of the first five-way valve 720 and the coolant inlet of the second evaporator 120 respectively. The coolant inlet of the first evaporator 110 is connected to the outlet of the cold core 620; the first interface of the second three-way valve 730 is connected to the coolant outlet of the condenser 200, and the third interface of the second three-way valve 730 is connected to the inlet of the warm core 610; the first interface of the second five-way valve 740 is selectively connected to the second interface of the second five-way valve 740, the third interface of the second five-way valve 740 and the fifth interface of the second five-way valve 740, respectively, and the fourth interface of the second five-way valve 740 is selectively connected to the second interface of the second five-way valve 740, the third interface of the second five-way valve 740 and the fifth interface of the second five-way valve 740, respectively. Five interfaces are selectively connected; the first interface of the second five-way valve 740 is connected to the second interface of the second three-way valve 730, the second interface of the second five-way valve 740 is respectively connected to the inlet of the motor cooler 300 and the outlet of the air-cooled heat exchanger 400, the third interface of the second five-way valve 740 is connected to the inlet of the air-cooled heat exchanger 400, the fourth interface of the second five-way valve 740 is respectively connected to the coolant outlet of the second evaporator 120 and the second interface of the first three-way valve 710, and the fifth interface of the second five-way valve 740 is respectively connected to the inlet of the battery heat exchanger 500 and the third interface of the first five-way valve 720.

[0037] The indirect heat pump system realizes 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 by setting the first three-way valve 710, the first five-way valve 720, the second three-way valve 730 and the second five-way valve 740. 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. At the same time, the opening and closing of each interface of the first three-way valve 710, the first five-way valve 720, the second three-way valve 730 and the second five-way valve 740 are coordinated, so that the coolant circuit of the indirect heat pump system has multiple working modes and can switch between multiple working modes.

[0038] Alternatively, if Figure 1 As shown, the indirect 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 first interface of the first five-way valve 720 to increase the flow rate and flow velocity of the coolant in and out of the condenser 200.

[0039] Alternatively, if Figure 1 As shown, the indirect 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 fifth interface of the first five-way valve 720 to increase the flow rate and flow velocity of the coolant entering and exiting the first evaporator 110.

[0040] Alternatively, if Figure 1 As shown, the indirect 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 third interface of the first five-way valve 720 and the fifth interface of the second five-way valve 740 to increase the flow rate and flow velocity of the coolant entering and exiting the battery heat exchanger 500.

[0041] Alternatively, if Figure 1 As shown, the indirect 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 coolant inlet of the first evaporator 110, the outlet of the cold core 620 and the fifth interface of the first five-way valve 720, so as to increase the flow rate and flow velocity of the coolant entering and exiting the second evaporator 120.

[0042] Alternatively, if Figure 1 and Figure 2As shown, when the indirect heat pump system is in the first mode, the first interface of the first three-way valve 710 is connected to the third interface of the first three-way valve 710, the second interface of the first five-way valve 720 is connected to the first interface of the first five-way valve 720, the fourth interface of the first five-way valve 720 is connected to the fifth interface of the first five-way valve 720, the first interface of the second three-way valve 730 is connected to the second interface of the second three-way valve 730, the first interface of the second five-way valve 740 is connected to the third interface of the second five-way valve 740, and the fourth interface of the second five-way valve 740 is connected to the fifth interface of the second five-way valve 740.

[0043] When the indirect heat pump system is in the first mode, the refrigerant circuit: the refrigerant absorbs heat from the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant ends 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 ends of the first evaporator 110 and the refrigerant ends of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0044] When the indirect heat pump system is in the first mode, the coolant circuit is divided into three 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, 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 in the first evaporator 110, and then the coolant enters the cold core 620, absorbs the heat of the air in the air conditioner in the cold core 620, and then enters the coolant inlet of the first evaporator 110 to form 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 coolant circuit of the indirect heat pump system is in the first mode, the motor, battery and cabin can be cooled simultaneously.

[0045] Alternatively, if Figure 1 and Figure 3As shown, when the indirect heat pump system is in the second mode, the first interface of the first three-way valve 710 is connected to the second interface of the first three-way valve 710, the second interface of the first five-way valve 720 is connected to the first interface of the first five-way valve 720, the fourth interface of the first five-way valve 720 is connected to the fifth interface of the first five-way valve 720, the first interface of the second three-way valve 730 is connected to the second interface of the second three-way valve 730, the first interface of the second five-way valve 740 is connected to the third interface of the second five-way valve 740, and the fourth interface of the second five-way valve 740 is connected to the fifth interface of the second five-way valve 740.

[0046] When the indirect heat pump system is in the second mode, the refrigerant circuit: the refrigerant absorbs heat from the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant ends 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 ends of the first evaporator 110 and the second evaporator 120 again, thereby completing the refrigerant cycle.

[0047] When the indirect 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.

[0048] When the indirect 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 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.

[0049] Alternatively, if Figure 1 and Figure 4 As shown, when the indirect heat pump system is in the third mode, the first interface of the first three-way valve 710 is connected to the second interface of the first three-way valve 710, the second interface of the first five-way valve 720 is connected to the fifth interface of the first five-way valve 720, the fourth interface of the first five-way valve 720 is connected to the first interface of the first five-way valve 720 and the third interface of the first five-way valve 720 respectively, the first interface of the second three-way valve 730 is connected to the second interface of the second three-way valve 730 and the third interface of the second three-way valve 730 respectively, the first interface of the second five-way valve 740 is connected to the fifth interface of the second five-way valve 740, and the fourth interface of the second five-way valve 740 is connected to the third interface of the second five-way valve 740.

[0050] When the indirect heat pump system is in the third mode, the refrigerant circuit: the refrigerant absorbs heat from the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant ends 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 ends of the first evaporator 110 and the second evaporator 120 again, thereby completing the refrigerant cycle.

[0051] When the indirect 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.

[0052] When the indirect 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.

[0053] Alternatively, if Figure 1 and Figure 5 As shown, when the indirect heat pump system is in the fourth mode, the first interface of the first three-way valve 710 is connected to the second interface of the first three-way valve 710, the second interface of the first five-way valve 720 is connected to the fifth interface of the first five-way valve 720, the fourth interface of the first five-way valve 720 is connected to the first interface of the first five-way valve 720 and the third interface of the first five-way valve 720 respectively, the first interface of the second three-way valve 730 is connected to the second interface of the second three-way valve 730 and the third interface of the second three-way valve 730 respectively, the first interface of the second five-way valve 740 is connected to the fifth interface of the second five-way valve 740, and the fourth interface of the second five-way valve 740 is connected to the second interface of the second five-way valve 740.

[0054] When the indirect heat pump system is in the fourth mode, the refrigerant circuit: the refrigerant absorbs heat from the coolant in the first evaporator 110 and the second evaporator 120 respectively, and then enters the refrigerant ends 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 ends of the first evaporator 110 and the refrigerant ends of the second evaporator 120 again, thereby completing the refrigerant cycle.

[0055] When the indirect 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 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 the 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.

[0056] When the indirect 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.

[0057] Alternatively, if Figure 1 and Figure 6 As shown, when the indirect heat pump system is in the fifth mode, the first interface of the first three-way valve 710 is connected to the third interface of the first three-way valve 710, the second interface of the first five-way valve 720 is connected to the fifth interface of the first five-way valve 720, the fourth interface of the first five-way valve 720 is connected to the third interface of the first five-way valve 720, the first interface of the second three-way valve 730 is connected to the third interface of the second three-way valve 730, and the fourth interface of the second five-way valve 740 is connected to the third interface of the second five-way valve 740.

[0058] When the indirect heat pump system is in the fifth mode, the refrigerant circuit: the refrigerant absorbs heat from 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.

[0059] When the indirect heat pump system is in the fifth mode, the coolant circuit is divided into four 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, in which 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 enters the motor cooler 300 again to absorb heat, forming the third branch of the coolant. Finally, the coolant is discharged from the outlet of the battery heat exchanger 500, and then enters the battery heat exchanger 500 from the inlet of the battery heat exchanger 500, forming the fourth branch of the coolant. At this time, the battery does not need to be cooled or heated, and the coolant forms a self-circulation in the fourth branch. When the indirect 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 conditioning box and the air in the cabin.

[0060] It should be noted that the specific structures of the first three-way valve 710, the first five-way valve 720, the second three-way valve 730 and the second five-way valve 740 in this embodiment are common structures in the art and will not be repeated here.

[0061] 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: 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 comprises a first three-way valve (710), a first five-way valve (720), a second three-way valve (730) and a second five-way valve (740); a first interface of the first three-way valve (710) is communicated with a coolant outlet of the first evaporator (110); a second interface of the first three-way valve (710) is communicated with a coolant outlet of the second evaporator (120); a third interface of the first three-way valve (710) is communicated with an inlet of the cold core (620); and a fourth interface of the first five-way valve (720) is communicated with a first interface of the first five-way valve (730) and a second interface of the second five-way valve (740). The first interface of the first five-way valve (720), the third interface of the first five-way valve (720) and the fifth interface of the first five-way valve (720) are selectively connected, and the second interface of the first five-way valve (720) is selectively connected with the first interface of the first five-way valve (720) and the fifth interface of the first five-way valve (720) respectively; the first interface of the first five-way valve (720) is respectively connected with the outlet of the warm core (610) and the coolant inlet of the condenser (200), and the second interface of the first five-way valve (720) is selectively connected with the motor cooler (3 00), the third interface of the first five-way valve (720) is connected to the inlet of the battery heat exchanger (500), the fourth interface of the first five-way valve (720) is connected to the outlet of the battery heat exchanger (500), the fifth interface of the first five-way valve (720) is respectively connected to the coolant inlet of the second evaporator (120), the coolant inlet of the first evaporator (110) and the outlet of the cold core (620); the first interface of the second three-way valve (730) is connected to the coolant outlet of the condenser (200), The third interface of the second three-way valve (730) is communicated with the inlet of the warm core (610); the first interface of the second five-way valve (740) is selectively communicated with the second interface of the second five-way valve (740), the third interface of the second five-way valve (740) and the fifth interface of the second five-way valve (740), respectively; the fourth interface of the second five-way valve (740) is selectively communicated with the second interface of the second five-way valve (740), the third interface of the second five-way valve (740) and the fifth interface of the second five-way valve (740), respectively;The first interface of the second five-way valve (740) is communicated with the second interface of the second three-way valve (730), the second interface of the second five-way valve (740) is communicated with the inlet of the motor cooler (300) and the outlet of the air-cooled heat exchanger (400), the third interface of the second five-way valve (740) is communicated with the inlet of the air-cooled heat exchanger (400), the fourth interface of the second five-way valve (740) is communicated with the coolant outlet of the second evaporator (120) and the second interface of the first three-way valve (710), and the fifth interface of the second five-way valve (740) is communicated with the inlet of the battery heat exchanger (500) and the third interface of the first five-way valve (720).

2. The indirect heat pump system according to claim 1, characterized in that: The indirect heat pump system further comprises a first water pump (810), the outlet of the first water pump (810) being connected to the coolant inlet of the condenser (200), and the inlet of the first water pump (810) being connected to the outlet of the warm core (610) and the first interface of the first five-way valve (720), respectively.

3. The indirect heat pump system according to claim 1, characterized in that: The indirect heat pump system further comprises a second water pump (820), the outlet of the second water pump (820) being connected to the coolant inlet of the first evaporator (110), and the inlet of the second water pump (820) being respectively connected to the outlet of the cold core (620), the coolant inlet of the second evaporator (120) and the fifth interface of the first five-way valve (720).

4. The indirect heat pump system according to claim 1, characterized in that: The indirect heat pump system further includes a third water pump (830), the outlet of the third water pump (830) being connected to the inlet of the battery heat exchanger (500), and the inlet of the third water pump (830) being connected to the third interface of the first five-way valve (720) and the fifth interface of the second five-way valve (740), respectively.

5. The indirect heat pump system according to claim 1, characterized in that: The indirect heat pump system further comprises a fourth water pump (840), the outlet of the fourth water pump (840) being connected to the coolant inlet of the second evaporator (120), and the inlet of the fourth water pump (840) being respectively connected to the coolant inlet of the first evaporator (110), the outlet of the cold core (620) and the fifth interface of the first five-way valve (720).

6. The indirect heat pump system according to any one of claims 1 to 5, characterized in that: When the indirect heat pump system is in the first mode, the first interface of the first three-way valve (710) is communicated with the third interface of the first three-way valve (710), the second interface of the first five-way valve (720) is communicated with the first interface of the first five-way valve (720), the fourth interface of the first five-way valve (720) is communicated with the fifth interface of the first five-way valve (720), the first interface of the second three-way valve (730) is communicated with the second interface of the second three-way valve (730), the first interface of the second five-way valve (740) is communicated with the third interface of the second five-way valve (740), and the fourth interface of the second five-way valve (740) is communicated with the fifth interface of the second five-way valve (740).

7. The indirect heat pump system according to any one of claims 1 to 5, characterized in that: When the indirect heat pump system is in the second mode, the first interface of the first three-way valve (710) is communicated with the second interface of the first three-way valve (710), the second interface of the first five-way valve (720) is communicated with the first interface of the first five-way valve (720), the fourth interface of the first five-way valve (720) is communicated with the fifth interface of the first five-way valve (720), the first interface of the second three-way valve (730) is communicated with the second interface of the second three-way valve (730), the first interface of the second five-way valve (740) is communicated with the third interface of the second five-way valve (740), and the fourth interface of the second five-way valve (740) is communicated with the fifth interface of the second five-way valve (740).

8. The indirect heat pump system according to any one of claims 1 to 5, characterized in that: When the indirect heat pump system is in the third mode, the first interface of the first three-way valve (710) is communicated with the second interface of the first three-way valve (710), the second interface of the first five-way valve (720) is communicated with the fifth interface of the first five-way valve (720), the fourth interface of the first five-way valve (720) is communicated with the first interface of the first five-way valve (720) and the third interface of the first five-way valve (720), respectively, the first interface of the second three-way valve (730) is communicated with the second interface of the second three-way valve (730) and the third interface of the second three-way valve (730), respectively, the first interface of the second five-way valve (740) is communicated with the fifth interface of the second five-way valve (740), and the fourth interface of the second five-way valve (740) is communicated with the third interface of the second five-way valve (740).

9. The indirect heat pump system according to any one of claims 1 to 5, characterized in that: When the indirect heat pump system is in the fourth mode, the first interface of the first three-way valve (710) is communicated with the second interface of the first three-way valve (710), the second interface of the first five-way valve (720) is communicated with the fifth interface of the first five-way valve (720), the fourth interface of the first five-way valve (720) is communicated with the first interface of the first five-way valve (720) and the third interface of the first five-way valve (720), respectively, the first interface of the second three-way valve (730) is communicated with the second interface of the second three-way valve (730) and the third interface of the second three-way valve (730), respectively, the first interface of the second five-way valve (740) is communicated with the fifth interface of the second five-way valve (740), and the fourth interface of the second five-way valve (740) is communicated with the second interface of the second five-way valve (740).

10. The indirect heat pump system according to any one of claims 1 to 5, characterized in that: When the indirect heat pump system is in the fifth mode, the first interface of the first three-way valve (710) is communicated with the third interface of the first three-way valve (710), the second interface of the first five-way valve (720) is communicated with the fifth interface of the first five-way valve (720), the fourth interface of the first five-way valve (720) is communicated with the third interface of the first five-way valve (720), the first interface of the second three-way valve (730) is communicated with the third interface of the second three-way valve (730), and the fourth interface of the second five-way valve (740) is communicated with the third interface of the second five-way valve (740).

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