Indirect heat pump system

Abstract

The utility model belongs to the technical field of heat pump systems, and discloses an indirect heat pump system which comprises a first evaporator, a second evaporator, a compressor, a condenser, a throttling pressure reduction element, a connecting valve group, a motor cooler, an air cooling heat exchanger, a battery heat exchanger, a warm core and a cold core. 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 outlet of the condenser selectively communicates with an inlet of the air cooling heat exchanger, an inlet of the warm core and an inlet of the battery heat exchanger through a connecting valve set. An outlet of the motor cooler and an outlet of the battery heat exchanger selectively communicate with a cooling liquid inlet of the condenser, a cooling liquid inlet of the first evaporator and a cooling liquid inlet of the second evaporator through connecting valve sets correspondingly. A cooling liquid outlet of the first evaporator and a cooling liquid outlet of the second evaporator selectively communicate with an inlet of the battery heat exchanger, an inlet of the air cooling heat exchanger and an inlet of the motor cooler through connecting valve sets correspondingly. Connection and disconnection between a cooling liquid outlet of the first evaporator and an inlet of the cold core, connection and disconnection between an outlet of the air cooling heat exchanger and an inlet of the motor cooler, connection and disconnection between an outlet of the warm core and a cooling liquid inlet of the condenser and connection and disconnection between an outlet of the cold core and a cooling liquid inlet of the first evaporator are all controlled by a connecting valve group; the cooling liquid loop of the indirect heat pump system not only integrates a plurality of loads, but also can realize switching of a plurality of working modes.

Description

Technical Field

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

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

[0003] Since the entire vehicle has multiple load requirements and multiple working mode requirements, for example: the cabin and power battery have both cooling and heating requirements, while the motor usually only has cooling requirements, this makes the coolant circuit design of the indirect heat pump system very complex.

[0004] 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

[0005] 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.

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

[0007] 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:

[0008] 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;

[0009] The coolant outlet of the condenser is selectively connected to the inlet of the air-cooled heat exchanger, the inlet of the heating core and the inlet of the battery heat exchanger through the connecting valve group;

[0010] The outlet of the motor cooler and the outlet of the battery heat exchanger are selectively connected to the coolant inlet of the condenser, the coolant inlet of the first evaporator, and the coolant inlet of the second evaporator through the connecting valve group respectively;

[0011] The coolant outlet of the first evaporator and the coolant outlet of the second evaporator are selectively connected to the inlet of the battery heat exchanger, the inlet of the air-cooled heat exchanger and the inlet of the motor cooler through the connecting valve group respectively;

[0012] The connection and disconnection between the coolant outlet of the first evaporator and the inlet of the cold core, the connection and disconnection between the outlet of the air-cooled heat exchanger and the inlet of the motor cooler, the connection and disconnection between the outlet of the warm core and the coolant inlet of the condenser, and the connection and disconnection between the outlet of the cold core and the coolant inlet of the first evaporator are all controlled by connecting the valve group.

[0013] Optionally, the connecting valve group includes a seven-way valve and an eight-way valve, the seventh interface of the seven-way valve is selectively connected to the first interface of the seven-way valve, the second interface of the seven-way valve, the sixth interface of the seven-way valve and the fifth interface of the seven-way valve respectively, the fourth interface of the seven-way valve is selectively connected to the third interface of the seven-way valve, the fifth interface of the seven-way valve and the sixth interface of the seven-way valve respectively, and the first interface of the seven-way valve is selectively connected to the second interface of the seven-way valve;

[0014] The fifth interface of the eight-way valve is selectively connected to the fourth interface of the eight-way valve, the sixth interface of the eight-way valve and the seventh interface of the eight-way valve respectively, the sixth interface of the eight-way valve is selectively connected to the seventh interface of the eight-way valve and the eighth interface of the eight-way valve respectively, the third interface of the eight-way valve is selectively connected to the first interface of the eight-way valve and the second interface of the eight-way valve respectively, and the eighth interface of the eight-way valve is selectively connected to the fourth interface of the eight-way valve;

[0015] The coolant inlet of the condenser is respectively connected to the eighth interface of the eight-way valve and the outlet of the warm core, and the coolant outlet of the condenser is connected to the seventh interface of the seven-way valve; the inlet of the motor cooler is respectively connected to the sixth interface of the seven-way valve and the outlet of the air-cooled heat exchanger, and the outlet of the motor cooler is connected to the fourth interface of the eight-way valve; the inlet of the air-cooled heat exchanger is connected to the fifth interface of the seven-way valve; the inlet of the battery heat exchanger is respectively connected to the third interface of the seven-way valve, the second interface of the seven-way valve and the seventh interface of the eight-way valve, and the outlet of the battery heat exchanger is connected to the sixth interface of the eight-way valve; the inlet of the warm core is connected to the first interface of the seven-way valve; the coolant inlet of the first evaporator is respectively connected to the outlet of the cold core, the coolant inlet of the second evaporator and the fifth interface of the eight-way valve, and the coolant outlet of the first evaporator is connected to the third interface of the eight-way valve; the inlet of the cold core is connected to the second interface of the eight-way valve; the coolant outlet of the second evaporator is respectively connected to the first interface of the eight-way valve and the fourth interface of the seven-way valve.

[0016] Optionally, when in the first mode, the seventh interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the fourth interface of the eight-way valve is connected to the eighth interface of the eight-way valve, the sixth interface of the eight-way valve is connected to the seventh interface of the eight-way valve, and the third interface of the eight-way valve is connected to the second interface of the eight-way valve.

[0017] Optionally, when in the second mode, the seventh interface of the seven-way valve is connected to the first interface of the seven-way valve, the fourth interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the third interface of the eight-way valve is connected to the first interface of the eight-way valve, the fourth interface of the eight-way valve is connected to the fifth interface of the eight-way valve, and the sixth interface of the eight-way valve is connected to the seventh interface of the eight-way valve.

[0018] Optionally, when in the third mode, the seventh interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the fourth interface of the seven-way valve is connected to the third interface of the seven-way valve, the third interface of the eight-way valve is connected to the first interface of the eight-way valve, the sixth interface of the eight-way valve is connected to the fifth interface of the eight-way valve, and the fourth interface of the eight-way valve is connected to the eighth interface of the eight-way valve.

[0019] Optionally, when in the fourth mode, the seventh interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the fourth interface of the seven-way valve is connected to the third interface of the seven-way valve, the fourth interface of the eight-way valve is connected to the eighth interface of the eight-way valve, the third interface of the eight-way valve is connected to the second interface of the eight-way valve, and the sixth interface of the eight-way valve is connected to the fifth interface of the eight-way valve.

[0020] Optionally, when in the fifth mode, the seventh interface of the seven-way valve is connected to the first interface of the seven-way valve and the second interface of the seven-way valve respectively, the fourth interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the fourth interface of the eight-way valve is connected to the fifth interface of the eight-way valve, the third interface of the eight-way valve is connected to the first interface of the eight-way valve, and the sixth interface of the eight-way valve is connected to the seventh interface of the eight-way valve and the eighth interface of the eight-way valve respectively.

[0021] Optionally, when in the sixth mode, the seventh interface of the seven-way valve is connected to the first interface of the seven-way valve and the second interface of the seven-way valve respectively, the fourth interface of the seven-way valve is connected to the sixth interface of the seven-way valve, the fourth interface of the eight-way valve is connected to the fifth interface of the eight-way valve, the third interface of the eight-way valve is connected to the first interface of the eight-way valve, and the sixth interface of the eight-way valve is connected to the seventh interface of the eight-way valve and the eighth interface of the eight-way valve respectively.

[0022] Optionally, when in the seventh mode, the seventh interface of the seven-way valve is connected to the first interface of the seven-way valve, the fourth interface of the seven-way valve is connected to the fifth interface of the seven-way valve, the third interface of the eight-way valve is connected to the second interface of the eight-way valve, the fourth interface of the eight-way valve is connected to the fifth interface of the eight-way valve, and the sixth interface of the eight-way valve is connected to the seventh interface of the eight-way valve.

[0023] Optionally, the indirect 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 eighth interface of the eight-way valve and the outlet of the warm core respectively.

[0024] Beneficial effects of the utility model:

[0025] The indirect heat pump system provided by the utility model realizes the integration and selective connection 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 setting a connecting valve group, and at the same time, the refrigerant end of the first evaporator and the refrigerant end of the second evaporator are connected with the refrigerant end of the condenser respectively, 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

[0026] Figure 1 It is a schematic diagram of the indirect heat pump system provided by the utility model;

[0027] 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;

[0028] 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;

[0029] 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;

[0030] 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;

[0031] Figure 6 It is a schematic diagram of a coolant circuit in the fifth mode of the indirect heat pump system provided by the utility model;

[0032] Figure 7 It is a schematic diagram of a coolant circuit in a sixth mode of an indirect heat pump system provided by the utility model;

[0033] Figure 8 This is a schematic diagram of a coolant circuit in the seventh mode of the indirect heat pump system provided by the utility model.

[0034] In the figure:

[0035] 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, seven-way valve; 720, eight-way valve; 810, first water pump; 820, second water pump; 830, third water pump; 840, fourth water pump. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Specifically, Figure 1As 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. Among them, the motor cooler 300 is used to cool down 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.

[0042] 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. At the same time, 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 are eight loads at the coolant end of the indirect heat pump system, which are integrated and selectively connected through connecting valve groups, so that the coolant circuit of the indirect heat pump system can integrate multiple loads while having multiple different working modes.

[0043] Specifically, if Figure 1As shown, the coolant outlet of the condenser 200 is selectively connected to the inlet of the air-cooled heat exchanger 400, the inlet of the warm core 610, and the inlet of the battery heat exchanger 500 through the connecting valve group; the outlet of the motor cooler 300 and the outlet of the battery heat exchanger 500 are selectively connected to the coolant inlet of the condenser 200, the coolant inlet of the first evaporator 110, and the coolant inlet of the second evaporator 120 through the connecting valve group; the coolant outlet of the first evaporator 110 and the coolant outlet of the second evaporator 120 are selectively connected to the coolant inlet of the battery heat exchanger 500 through the connecting valve group. The inlet of the heat exchanger 500, the inlet of the air-cooled heat exchanger 400 and the inlet of the motor cooler 300 are connected; the connection and disconnection between the coolant outlet of the first evaporator 110 and the inlet of the cold core 620, the connection and disconnection between the outlet of the air-cooled heat exchanger 400 and the inlet of the motor cooler 300, the connection and disconnection between the outlet of the warm core 610 and the coolant inlet of the condenser 200, the connection and disconnection between the outlet of the cold core 620 and the coolant inlet of the first evaporator 110, and the connection and disconnection between the outlet of the battery heat exchanger 500 and the inlet of the battery heat exchanger 500 are all controlled by the connecting valve group. It can be seen that by setting up the connecting valve group, the integration and selective connection 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 are achieved. 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, so that the coolant circuit of the indirect heat pump system has multiple working modes and can switch between multiple working modes.

[0044] Furthermore, if Figure 1 As shown, the connecting valve group includes a seven-way valve 710 and an eight-way valve 720, the seventh interface of the seven-way valve 710 is selectively connected to the first interface of the seven-way valve 710, the second interface of the seven-way valve 710, the sixth interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710, respectively, the fourth interface of the seven-way valve 710 is selectively connected to the third interface of the seven-way valve 710, the fifth interface of the seven-way valve 710 and the sixth interface of the seven-way valve 710, respectively, and the first interface of the seven-way valve 710 is selectively connected to the second interface of the seven-way valve 710.

[0045] The fifth interface of the eight-way valve 720 is selectively connected to the fourth interface of the eight-way valve 720, the sixth interface of the eight-way valve 720 and the seventh interface of the eight-way valve 720, respectively; the sixth interface of the eight-way valve 720 is selectively connected to the seventh interface of the eight-way valve 720 and the eighth interface of the eight-way valve 720, respectively; the third interface of the eight-way valve 720 is selectively connected to the first interface of the eight-way valve 720 and the second interface of the eight-way valve 720, respectively; and the eighth interface of the eight-way valve 720 is selectively connected to the fourth interface of the eight-way valve 720.

[0046] The coolant inlet of the condenser 200 is respectively connected to the eighth interface of the eight-way valve 720 and the outlet of the warm core 610, and the coolant outlet of the condenser 200 is connected to the seventh interface of the seven-way valve 710; the inlet of the motor cooler 300 is respectively connected to the sixth interface of the seven-way valve 710 and the outlet of the air-cooled heat exchanger 400, and the outlet of the motor cooler 300 is connected to the fourth interface of the eight-way valve 720; the inlet of the air-cooled heat exchanger 400 is connected to the fifth interface of the seven-way valve 710; the inlet of the battery heat exchanger 500 is respectively connected to the third interface of the seven-way valve 710, the second interface of the seven-way valve 710 and the third interface of the eight-way valve 720 Seven interfaces are connected, the outlet of the battery heat exchanger 500 is connected to the sixth interface of the eight-way valve 720; the inlet of the warm core 610 is connected to the first interface of the seven-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 fifth interface of the eight-way valve 720, and the coolant outlet of the first evaporator 110 is connected to the third interface of the eight-way valve 720; the inlet of the cold core 620 is connected to the second interface of the eight-way valve 720; the coolant outlet of the second evaporator 120 is respectively connected to the first interface of the eight-way valve 720 and the fourth interface of the seven-way valve 710.

[0047] Alternatively, if Figure 1 As shown, the indirect heat pump system further includes a first water pump 810, a second water pump 820, a third water pump 830 and a fourth water pump 840, wherein 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 eighth interface of the eight-way valve 720 and the outlet of the warm core 610; 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 and the coolant inlet of the second evaporator 120. 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 seven-way valve 710, the second interface of the seven-way valve 710 and the seventh interface of the eight-way valve 720; 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 eight-way valve 720.

[0048] By simply coordinating the opening and closing of the seven interfaces of the seven-way valve 710 and the opening and closing of the eight interfaces of the eight-way valve 720, the coolant circuit of the indirect heat pump system can have seven different working modes, and the seven working modes can be switched among each other according to different usage requirements of the car.

[0049] like Figure 2The figure shows a schematic diagram of the coolant circuit of the first mode. At this time, the seventh interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the fourth interface of the eight-way valve 720 is connected to the eighth interface of the eight-way valve 720, the sixth interface of the eight-way valve 720 is connected to the seventh interface of the eight-way valve 720, and the third interface of the eight-way valve 720 is connected to the second interface of the eight-way valve 720.

[0050] Refrigerant circuit: After absorbing heat from the coolant in the first evaporator 110, the refrigerant enters the refrigerant end of the compressor and the condenser 200 in sequence. After releasing heat to the coolant in the condenser 200, the refrigerant enters the throttling and pressure reducing element, and then enters the refrigerant end of the first evaporator 110 again, thereby completing the refrigerant cycle.

[0051] The cooling liquid circuit is divided into three branches: after the cooling liquid dissipates heat in the first evaporator 110, it enters the cold core 620 through the third interface and the second interface of the eight-way valve 720, where the cooling liquid absorbs the heat of the air in the air conditioning box, and then enters the cooling liquid inlet of the first evaporator 110, forming the first branch of the cooling liquid, and the low-temperature air in the air conditioning box enters the vehicle cabin through the air duct to achieve the cooling effect on the vehicle cabin. Secondly, the cooling liquid absorbs the heat emitted by the motor in the motor cooler 300 to cool the motor, and then the cooling liquid passes through the fourth interface of the eight-way valve 720, the eighth interface of the eight-way valve 720 and the cooling liquid inlet of the condenser 200 in sequence, and the cooling liquid absorbs the heat dissipated by the refrigerant in the condenser 200, and then passes through the seventh interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710, and then enters the air-cooled heat exchanger 400, and the cooling liquid dissipates heat to the air in the air-cooled heat exchanger 400 and enters the motor cooler 300 again to absorb heat, forming the second branch of the cooling liquid. Again, after the coolant is discharged from the outlet of the battery heat exchanger 500, it passes through the sixth interface of the eight-way valve 720 and the seventh interface of the eight-way valve 720 in sequence, and then enters the inlet of the battery heat exchanger 500 to form the third 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 third branch. It can be seen that when the coolant loop of the indirect heat pump system is in the first mode, the cabin and the motor can be cooled.

[0052] like Figure 3 The figure shows a schematic diagram of the coolant circuit of the second mode. At this time, the seventh interface of the seven-way valve 710 is connected to the first interface of the seven-way valve 710, the fourth interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the third interface of the eight-way valve 720 is connected to the first interface of the eight-way valve 720, the fourth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720, and the sixth interface of the eight-way valve 720 is connected to the seventh interface of the eight-way valve 720.

[0053] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0054] The coolant circuit is divided into three branches: the coolant absorbs the heat of the refrigerant in the condenser 200, and then enters the warm core 610 through the seventh interface of the seven-way valve 710 and the first interface of the seven-way valve 710. In the warm core 610, the coolant dissipates heat to the air in the air-conditioning box, and then enters the coolant inlet of the condenser 200, forming the 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 passes through the fourth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720 in turn, and 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 passes through the third interface and the first interface of the eight-way valve 720, and then merges with the coolant discharged from the second evaporator 120 at the fourth interface of the seven-way valve 710, and then passes through the fourth interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710 to enter 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. Again, after the coolant is discharged from the outlet of the battery heat exchanger 500, it passes through the sixth interface of the eight-way valve 720 and the seventh interface of the eight-way valve 720 in sequence, and then enters the inlet of the battery heat exchanger 500 to form a third 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 third branch.

[0055] When the coolant loop of the indirect heat pump system is in the second mode, the cabin can be heated and the motor can be cooled. In the second 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 heat from the coolant in the first evaporator 110 and the second evaporator 120, respectively, so that the refrigerant entering the condenser 200 has enough heat to exchange heat with the coolant in the condenser 200, thereby ensuring the heat supply of the coolant in the first branch to the air in the air conditioning box. It can be seen that the indirect heat pump system provided in this embodiment does not require the addition of additional components. It only needs to change the on-off of each interface of the seven-way valve 710 and the on-off of each interface of the eight-way valve 720 to switch the different working modes of the coolant circulation, which has the effect of simplifying the system structure and simplifying the control difficulty.

[0056] like Figure 4 The figure shows a schematic diagram of the coolant circuit of the third mode. At this time, the seventh interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the fourth interface of the seven-way valve 710 is connected to the third interface of the seven-way valve 710, the third interface of the eight-way valve 720 is connected to the first interface of the eight-way valve 720, the sixth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720, and the fourth interface of the eight-way valve 720 is connected to the eighth interface of the eight-way valve 720.

[0057] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0058] 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 passes through the fourth interface of the eight-way valve 720, the eighth interface of the eight-way valve 720 and the coolant inlet of the condenser 200 in sequence. The coolant absorbs the heat dissipated by the refrigerant in the condenser 200, and then passes through the seventh interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710 to enter 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 passes through the sixth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720 in turn, and then 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 passes through the third interface and the first interface of the eight-way valve 720, and then merges with the coolant discharged from the second evaporator 120 at the fourth interface of the seven-way valve 710, and then enters the battery heat exchanger 500 again through the fourth interface of the seven-way valve 710 and the third interface of the seven-way valve 710 to form a second branch of the coolant.

[0059] When the coolant loop of the indirect heat pump system is in the third mode, the battery and the motor can be cooled. When the battery is quickly charged, a large amount of heat will be dissipated, and the battery needs to be cooled quickly at this time. Therefore, in this 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 cooling capacity.

[0060] like Figure 5 The figure shows a schematic diagram of the coolant circuit of the fourth mode. At this time, the seventh interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the fourth interface of the seven-way valve 710 is connected to the third interface of the seven-way valve 710, the fourth interface of the eight-way valve 720 is connected to the eighth interface of the eight-way valve 720, the third interface of the eight-way valve 720 is connected to the second interface of the eight-way valve 720, and the sixth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720.

[0061] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0062] 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 passes through the fourth interface of the eight-way valve 720, the eighth interface of the eight-way valve 720 and the coolant inlet of the condenser 200 in sequence. The coolant absorbs the heat dissipated by the refrigerant in the condenser 200, and then passes through the seventh interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710 to enter 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 from the battery in the battery heat exchanger 500 to cool the battery, and then the coolant enters the coolant inlet of the second evaporator 120 through the sixth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720, and the coolant dissipates heat to the refrigerant in the second evaporator 120 in the second evaporator 120, and then the coolant enters the battery heat exchanger 500 again through the fourth interface of the seven-way valve 710 and the third interface of the seven-way valve 710, forming a second branch of the coolant. Thirdly, 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 through the third interface of the eight-way valve 720 and the second interface of the eight-way valve 720, and the coolant 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, 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 coolant circuit of the indirect heat pump system is in the fourth mode, the motor, battery and cabin can be cooled simultaneously.

[0063] like Figure 6 The figure shows a schematic diagram of the coolant circuit of the fifth mode. At this time, the seventh interface of the seven-way valve 710 is connected to the first interface of the seven-way valve 710 and the second interface of the seven-way valve 710 respectively, the fourth interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the fourth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720, the third interface of the eight-way valve 720 is connected to the first interface of the eight-way valve 720, and the sixth interface of the eight-way valve 720 is connected to the seventh interface of the eight-way valve 720 and the eighth interface of the eight-way valve 720 respectively.

[0064] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0065] The coolant circuit is divided into two branches: the coolant discharged from the battery heat exchanger 500 is divided into two branches through the sixth interface of the eight-way valve 720, one branch returns to the battery heat exchanger 500 through the seventh interface of the eight-way valve 720, and the other branch of the coolant merges with the coolant discharged from the warm core 610 through the eighth interface of the eight-way valve 720, and enters the coolant inlet of the condenser 200. The coolant absorbs the heat of the refrigerant in the condenser 200, and then enters the seven-way valve 710 through the seventh interface of the seven-way valve 710, and is divided into two branches at the first interface of the seven-way valve 710, one of which enters the warm core 610, and 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 through the second interface of the seven-way valve 710 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 passes through the fourth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720 in turn, and 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 passes through the third interface and the first interface of the eight-way valve 720, and then merges with the coolant discharged from the second evaporator 120 at the fourth interface of the seven-way valve 710, and then passes through the fourth interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710 to enter 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.

[0066] When the coolant circuit of the indirect heat pump system is in the fifth mode, the cabin and the battery can be heated and the motor can be cooled. In the fifth 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.

[0067] like Figure 7 The figure shows a schematic diagram of the coolant circuit of the sixth mode. At this time, the seventh interface of the seven-way valve 710 is connected to the first interface of the seven-way valve 710 and the second interface of the seven-way valve 710 respectively, the fourth interface of the seven-way valve 710 is connected to the sixth interface of the seven-way valve 710, the fourth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720, the third interface of the eight-way valve 720 is connected to the first interface of the eight-way valve 720, and the sixth interface of the eight-way valve 720 is connected to the seventh interface of the eight-way valve 720 and the eighth interface of the eight-way valve 720 respectively.

[0068] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0069] The coolant circuit is divided into two branches: the coolant discharged from the battery heat exchanger 500 is divided into two branches through the sixth interface of the eight-way valve 720, one branch returns to the battery heat exchanger 500 through the seventh interface of the eight-way valve 720, and the other branch of the coolant merges with the coolant discharged from the warm core 610 through the eighth interface of the eight-way valve 720, and enters the coolant inlet of the condenser 200. The coolant absorbs the heat of the refrigerant in the condenser 200, and then enters the seven-way valve 710 through the seventh interface of the seven-way valve 710, and is divided into two branches at the first interface of the seven-way valve 710, one of which enters the warm core 610, and 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 through the second interface of the seven-way valve 710 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 passes through the fourth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720 in turn, and 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 passes through the third interface and the first interface of the eight-way valve 720, and then merges with the coolant discharged from the second evaporator 120 at the fourth interface of the seven-way valve 710, and then enters the motor cooler 300 again through the fourth interface of the seven-way valve 710 and the sixth interface of the seven-way valve 710 to absorb heat, forming a second branch of the coolant.

[0070] When the coolant circuit of the indirect heat pump system is in the sixth mode, the cabin and the battery can be heated and the motor can be cooled. In the sixth 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 sixth mode, the recovery of the heat dissipated by the motor is achieved, and this part of the heat is used for cabin heating and battery heating, thereby achieving the effect of motor waste heat recovery.

[0071] like Figure 8The figure shows a schematic diagram of the coolant circuit of the seventh mode. At this time, the seventh interface of the seven-way valve 710 is connected to the first interface of the seven-way valve 710, the fourth interface of the seven-way valve 710 is connected to the fifth interface of the seven-way valve 710, the third interface of the eight-way valve 720 is connected to the second interface of the eight-way valve 720, the fourth interface of the eight-way valve 720 is connected to the fifth interface of the eight-way valve 720, and the sixth interface of the eight-way valve 720 is connected to the seventh interface of the eight-way valve 720.

[0072] 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 sequence. After releasing heat to the coolant in the condenser 200, the refrigerant 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, respectively, thereby completing the refrigerant cycle.

[0073] The coolant circuit is divided into four branches: after the coolant dissipates heat in the first evaporator 110, it enters the cold core 620 through the third interface and the second interface of the eight-way valve 720, where the coolant absorbs the heat of the air in the air conditioner, and then enters the coolant inlet of the first evaporator 110, forming 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 through the seventh interface of the seven-way valve 710 and the first interface of the seven-way valve 710, where the coolant dissipates heat to the air in the air conditioner, and then enters the coolant inlet of the condenser 200, forming the second branch of the coolant. Again, the coolant absorbs the heat generated by the motor in the motor cooler 300 to cool the motor, and then the coolant passes through the fourth interface of the eight-way valve 720 and the fifth interface of the eight-way valve 720 in turn, and flows to the coolant inlet of the second evaporator 120. The coolant dissipates heat to the refrigerant in the second evaporator 120, and then the coolant passes through the fourth interface of the seven-way valve 710 and the fifth interface of the seven-way valve 710, and 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 third branch of the coolant. Finally, after the coolant is discharged from the outlet of the battery heat exchanger 500, it passes through the sixth interface of the eight-way valve 720 and the seventh interface of the eight-way valve 720 in turn, and then enters 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.

[0074] When the coolant circuit of the indirect heat pump system is in the seventh mode, the motor can be cooled, and in the seventh 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.

[0075] It can be seen that the indirect heat pump system provided in this embodiment can not only integrate the condenser 200, the motor cooler 300, the air-cooled heat exchanger 400, the battery heat exchanger 500, the warm core 610, the first evaporator 110, the second evaporator 120 and the cold core 620 in the same coolant circuit, but also can realize the switching of the coolant circuit between seven different modes by adjusting the connection state between the seven interfaces of the seven-way valve 710 and the connection state between the eight interfaces of the eight-way valve 720, so that it can meet the various use requirements of the automobile. It should be noted that the specific structures of the seven-way valve 710 and the eight-way valve 720 in this embodiment are common structures in the field and will not be repeated here.

[0076] 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 coolant outlet of the condenser (200) is selectively connected to the inlet of the air-cooled heat exchanger (400), the inlet of the warm core (610), and the inlet of the battery heat exchanger (500) through the connecting valve group; The outlet of the motor cooler (300) and the outlet of the battery heat exchanger (500) are selectively connected to the coolant inlet of the condenser (200), the coolant inlet of the first evaporator (110), and the coolant inlet of the second evaporator (120) through the connecting valve group respectively; The coolant outlet of the first evaporator (110) and the coolant outlet of the second evaporator (120) are selectively connected to the inlet of the battery heat exchanger (500), the inlet of the air-cooled heat exchanger (400), and the inlet of the motor cooler (300) through the connecting valve group respectively; The connection and disconnection between the coolant outlet of the first evaporator (110) and the inlet of the cold core (620), the connection and disconnection between the outlet of the air-cooled heat exchanger (400) and the inlet of the motor cooler (300), the connection and disconnection between the outlet of the warm core (610) and the coolant inlet of the condenser (200), and the connection and disconnection between the outlet of the cold core (620) and the coolant inlet of the first evaporator (110) are all controlled by the connecting valve group.

2. The indirect heat pump system according to claim 1, characterized in that: The connecting valve group comprises a seven-way valve (710) and an eight-way valve (720); the seventh interface of the seven-way valve (710) is selectively connected to the first interface of the seven-way valve (710), the second interface of the seven-way valve (710), the sixth interface of the seven-way valve (710) and the fifth interface of the seven-way valve (710), respectively; the fourth interface of the seven-way valve (710) is selectively connected to the third interface of the seven-way valve (710), the fifth interface of the seven-way valve (710) and the sixth interface of the seven-way valve (710), respectively; and the first interface of the seven-way valve (710) is selectively connected to the second interface of the seven-way valve (710); The fifth interface of the eight-way valve (720) is selectively connected to the fourth interface of the eight-way valve (720), the sixth interface of the eight-way valve (720), and the seventh interface of the eight-way valve (720), respectively; the sixth interface of the eight-way valve (720) is selectively connected to the seventh interface of the eight-way valve (720) and the eighth interface of the eight-way valve (720), respectively; the third interface of the eight-way valve (720) is selectively connected to the first interface of the eight-way valve (720) and the second interface of the eight-way valve (720), respectively; and the eighth interface of the eight-way valve (720) is selectively connected to the fourth interface of the eight-way valve (720); The coolant inlet of the condenser (200) is respectively connected to the eighth interface of the eight-way valve (720) and the outlet of the warm core (610), and the coolant outlet of the condenser (200) is connected to the seventh interface of the seven-way valve (710); the inlet of the motor cooler (300) is respectively connected to the sixth interface of the seven-way valve (710) and the outlet of the air-cooled heat exchanger (400), and the outlet of the motor cooler (300) is connected to the fourth interface of the eight-way valve (720); the inlet of the air-cooled heat exchanger (400) is connected to the fifth interface of the seven-way valve (710); the inlet of the battery heat exchanger (500) is respectively connected to the third interface of the seven-way valve (710), the second interface of the seven-way valve (710) and the eight-way valve (720). The seventh interface of the battery heat exchanger (500) is connected to the sixth interface of the eight-way valve (720); the inlet of the warm core (610) is connected to the first interface of the seven-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 fifth interface of the eight-way valve (720), and the coolant outlet of the first evaporator (110) is connected to the third interface of the eight-way valve (720); the inlet of the cold core (620) is connected to the second interface of the eight-way valve (720); the coolant outlet of the second evaporator (120) is respectively connected to the first interface of the eight-way valve (720) and the fourth interface of the seven-way valve (710).

3. The indirect heat pump system according to claim 2, characterized in that: When in the first mode, the seventh interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the fourth interface of the eight-way valve (720) is connected to the eighth interface of the eight-way valve (720), the sixth interface of the eight-way valve (720) is connected to the seventh interface of the eight-way valve (720), and the third interface of the eight-way valve (720) is connected to the second interface of the eight-way valve (720).

4. The indirect heat pump system according to claim 2, characterized in that: When in the second mode, the seventh interface of the seven-way valve (710) is connected to the first interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the third interface of the eight-way valve (720) is connected to the first interface of the eight-way valve (720), the fourth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720), and the sixth interface of the eight-way valve (720) is connected to the seventh interface of the eight-way valve (720).

5. The indirect heat pump system according to claim 2, characterized in that: When in the third mode, the seventh interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the third interface of the seven-way valve (710), the third interface of the eight-way valve (720) is connected to the first interface of the eight-way valve (720), the sixth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720), and the fourth interface of the eight-way valve (720) is connected to the eighth interface of the eight-way valve (720).

6. The indirect heat pump system according to claim 2, characterized in that: When in the fourth mode, the seventh interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the third interface of the seven-way valve (710), the fourth interface of the eight-way valve (720) is connected to the eighth interface of the eight-way valve (720), the third interface of the eight-way valve (720) is connected to the second interface of the eight-way valve (720), and the sixth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720).

7. The indirect heat pump system according to claim 2, characterized in that: When in the fifth mode, the seventh interface of the seven-way valve (710) is respectively connected to the first interface of the seven-way valve (710) and the second interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the fourth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720), the third interface of the eight-way valve (720) is connected to the first interface of the eight-way valve (720), and the sixth interface of the eight-way valve (720) is respectively connected to the seventh interface of the eight-way valve (720) and the eighth interface of the eight-way valve (720).

8. The indirect heat pump system according to claim 2, characterized in that: When in the sixth mode, the seventh interface of the seven-way valve (710) is respectively connected to the first interface of the seven-way valve (710) and the second interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the sixth interface of the seven-way valve (710), the fourth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720), the third interface of the eight-way valve (720) is connected to the first interface of the eight-way valve (720), and the sixth interface of the eight-way valve (720) is respectively connected to the seventh interface of the eight-way valve (720) and the eighth interface of the eight-way valve (720).

9. The indirect heat pump system according to claim 2, characterized in that: When in the seventh mode, the seventh interface of the seven-way valve (710) is connected to the first interface of the seven-way valve (710), the fourth interface of the seven-way valve (710) is connected to the fifth interface of the seven-way valve (710), the third interface of the eight-way valve (720) is connected to the second interface of the eight-way valve (720), the fourth interface of the eight-way valve (720) is connected to the fifth interface of the eight-way valve (720), and the sixth interface of the eight-way valve (720) is connected to the seventh interface of the eight-way valve (720).

10. The indirect heat pump system according to any one of claims 2 to 9, 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 eighth interface of the eight-way valve (720) and the outlet of the warm core (610), respectively.

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