Secondary loop thermal management system and vehicle

Abstract

The invention discloses a secondary loop heat management system and a vehicle, the secondary loop heat management system comprises a refrigerant loop and a cooling liquid loop, the cooling liquid loop comprises a first in-cabin heat exchanger, a second in-cabin heat exchanger, a water-cooling condenser, a water-cooling evaporator and a first multi-way valve which are communicated, and under the adjustment of the first multi-way valve, the water-cooling condenser and the water-cooling evaporator are communicated with the second in-cabin heat exchanger. The cooling liquid loop at least can form three communication modes; in the first communication mode, the first cabin heat exchanger and the second cabin heat exchanger are communicated with the water cooling evaporator and refrigerate a cabin of the vehicle; in the second communication mode, the first cabin heat exchanger and the second cabin heat exchanger are communicated with the water-cooled condenser and heat the cabin; and in the third communication mode, the first in-cabin heat exchanger communicates with the water-cooling evaporator and refrigerates the cabin, and the second in-cabin heat exchanger communicates with the water-cooling condenser and heats the cabin. According to the technical scheme, the heat exchange area of the heat exchanger in the cabin can be increased, and the system efficiency of the secondary loop heat management system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management systems, and in particular to a secondary circuit thermal management system and a vehicle. Background Art

[0002] The thermal management system of new energy vehicles is becoming increasingly complex. With the application of flammable refrigerants such as propane, the refrigerant side system is required to be as simple and compact as possible, and to meet the safety requirements of flammable refrigerants. Therefore, new energy vehicles usually adopt a secondary circuit thermal management system.

[0003] In the secondary circuit thermal management system, the heat exchanger core of the cabin heat exchanger includes a cooling air core and a heating air core. The cooling air core and the heating air core are enabled separately in the corresponding modes (for example, heating mode only or cooling mode only), or are enabled simultaneously as the cooling source and heating source in the cabin (for example, dehumidification mode). In this working mode, the heat exchange area of ​​the heat exchanger core cannot be fully utilized, resulting in the need for further improvement in system efficiency. Summary of the Invention

[0004] The main purpose of the present invention is to provide a secondary circuit thermal management system, aiming to improve the utilization rate of the heat exchange area of ​​the cabin heat exchanger, thereby improving the system efficiency of the secondary circuit thermal management system.

[0005] To achieve the above objectives, the present invention proposes a secondary circuit thermal management system, which is applied to a vehicle. The secondary circuit thermal management system includes:

[0006] A refrigerant circuit comprising a compressor, a water-cooled condenser, a first throttling device, and a water-cooled evaporator connected to each other; and

[0007] a coolant circuit comprising a first in-cabin heat exchanger, a second in-cabin heat exchanger, a water-cooled condenser, a water-cooled evaporator, and a first multi-way valve, wherein the coolant circuit can form at least three communication modes under the regulation of the first multi-way valve;

[0008] In a first connectivity mode, the first in-cabin heat exchanger and the second in-cabin heat exchanger are connected to the water-cooled evaporator and cool the vehicle cabin; in a second connectivity mode, the first in-cabin heat exchanger and the second in-cabin heat exchanger are connected to the water-cooled condenser and heat the cabin; in a third connectivity mode, the first in-cabin heat exchanger is connected to the water-cooled evaporator and cools the cabin, and the second in-cabin heat exchanger is connected to the water-cooled condenser and heats the cabin.

[0009] Optionally, the first multi-way valve has at least a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface and an eighth interface, the first interface is connected to the water inlet end of the first cabin heat exchanger, the second interface is connected to the water outlet end of the first cabin heat exchanger, the third interface is connected to the water inlet end of the second cabin heat exchanger, the fourth interface is connected to the water outlet end of the second cabin heat exchanger, the fifth interface is connected to the water inlet end of the water-cooled evaporator, the sixth interface is connected to the water outlet end of the water-cooled evaporator, the seventh interface is connected to the water outlet end of the water-cooled condenser, and the eighth interface is connected to the water inlet end of the water-cooled condenser.

[0010] Optionally, in the first connectivity mode, the first interface is connected to the sixth interface, the second interface is connected to the third interface, and the fourth interface is connected to the fifth interface; the seventh interface is connected to the eighth interface or not.

[0011] Optionally, in the second connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the third interface, and the fourth interface is connected to the eighth interface; the fifth interface is connected to the sixth interface or not.

[0012] Optionally, in the second connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the third interface, the fourth interface is connected to the fifth interface, and the sixth interface is connected to the eighth interface.

[0013] Optionally, in the third connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the eighth interface, the third interface is connected to the sixth interface, and the fourth interface is connected to the fifth interface.

[0014] Optionally, the vehicle further includes a bellows and a blower, wherein the blower is capable of driving air from the bellows into the cabin, and the first cabin heat exchanger and the second cabin heat exchanger are arranged in the bellows, and the first cabin heat exchanger is located downstream of the second cabin heat exchanger.

[0015] Optionally, the fan is arranged in the wind box and upstream of the second cabin heat exchanger.

[0016] Optionally, the first multi-way valve is configured as an eight-way valve.

[0017] The present invention further provides a vehicle including a cabin and the aforementioned secondary circuit thermal management system.

[0018] The technical solution of the present invention, through the adjustment of the first multi-way valve, makes it no longer necessary for the first cabin heat exchanger and the second cabin heat exchanger to be clearly distinguished as a cold air core and a warm air core. The functions can be flexibly changed to function simultaneously in the same connection mode, and the heat exchange area of ​​the thermal management system under the cabin heating condition can be increased, thereby improving the efficiency of the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a coolant circuit of a first embodiment of a secondary circuit thermal management system of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of a coolant circuit of the first multi-way valve in the first communication mode of the illustrated embodiment;

[0022] Figure 3 for Figure 1 Schematic diagram of the coolant circuit of the first multi-way valve in the second communication mode (conventional heating mode) of the illustrated embodiment;

[0023] Figure 4 for Figure 1 A schematic diagram of a coolant circuit of the first multi-way valve of the illustrated embodiment in a second communication mode (water system short-circuit mode);

[0024] Figure 5 for Figure 1 A schematic diagram of a coolant circuit of the first multi-way valve in the third communication mode of the illustrated embodiment;

[0025] Figure 6 A schematic structural diagram of a coolant circuit according to a second embodiment of a secondary circuit thermal management system of the present invention;

[0026] Figure 7 for Figure 6 Schematic diagram of the coolant circuit of the illustrated embodiment in the first operating mode;

[0027] Figure 8 for Figure 6 Schematic diagram of the coolant circuit of the illustrated embodiment in the second operating mode;

[0028] Figure 9 for Figure 6A schematic diagram of the second multi-way valve in the first conduction mode of the illustrated embodiment;

[0029] Figure 10 for Figure 9 A schematic diagram of the second multi-way valve in a second conduction mode;

[0030] Figure 11 for Figure 9 Schematic diagram of the second multi-way valve in the third conduction mode;

[0031] Figure 12 for Figure 9 Schematic diagram of the second multi-way valve in the fourth conduction mode.

[0032] Description of Figure Numbers:

[0033] Label name Label name 101 First cabin heat exchanger 16 Sixth interface 102 Second cabin heat exchanger 17 Seventh interface 103 Water-cooled condenser 18 Eighth interface 104 Water-cooled evaporator 20 Second multi-way valve 105 bellows 21 Interface 11 106 fan 22 Interface 12 107 First water pump 23 Thirteenth interface 108 Second water pump 24 Interface 14 109 The third water pump 25 Interface 15 110 Battery system 26 Interface 16 111 Electric drive system 27 Interface 17 112 Outboard heat exchanger 30 The third multi-way valve 201 compressor 31 Interface 21 202 The first throttle device 32 Interface 22 10 First multi-way valve 33 Interface 23 11 First interface 40 Fourth multi-way valve 12 Second interface 41 Interface 31 13 The third interface 42 Interface 32 14 Fourth interface 43 Interface 33 15 Fifth interface

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a secondary circuit thermal management system for a vehicle including a cabin. The secondary circuit thermal management system is capable of regulating the interior air of the cabin, for example, achieving functions such as heating, cooling, and dehumidifying the cabin.

[0040] Please refer to Figures 1 to 8 ,in, Figures 1 to 5 The arrow above the fan 106 indicates the direction of air flow. Figures 1 to 5 The middle dotted line represents the bellows structure. Figure 2 、 Figure 3 、 Figure 7 and Figure 8 The thin dotted line indicates that the coolant flow path is not connected.

[0041] Please refer to Figures 1 to 5 In the first embodiment of the present invention, the secondary circuit thermal management system includes a refrigerant circuit and a coolant circuit, wherein the refrigerant circuit includes a compressor 201, a water-cooled condenser 103, a first throttling device 202, and a water-cooled evaporator 104 that are connected to each other; the coolant circuit includes a first cabin heat exchanger 101, a second cabin heat exchanger 102, a water-cooled condenser 103, a water-cooled evaporator 104, and a first multi-way valve 10 that are connected to each other. Under the regulation of the first multi-way valve 10, the coolant circuit can form at least three connection modes.

[0042] Without loss of generality, both the water-cooled condenser 103 and the water-cooled evaporator 104 have independent, heat-exchangeable agent-side channels and water-side channels. The agent-side channels are used to circulate refrigerant, while the water-side channels are used to circulate coolant. In other words, the refrigerant circuit and the coolant circuit exchange heat through the water-cooled evaporator 104 and the water-cooled condenser 103.

[0043] Specifically, in the first connectivity mode, the first cabin heat exchanger 101 and the second cabin heat exchanger 102 are connected to the water-cooled evaporator 104 and cool the vehicle cabin; in the second connectivity mode, the first cabin heat exchanger 101 and the second cabin heat exchanger 102 are connected to the water-cooled condenser 103 and heat the cabin; in the third connectivity mode, the first cabin heat exchanger 101 is connected to the water-cooled evaporator 104 and cools the cabin, and the second cabin heat exchanger 102 is connected to the water-cooled condenser 103 and heats the cabin.

[0044] It can be understood that, through adjustment of the first multi-way valve 10, both the first and second in-cabin heat exchangers 101, 102 can function as cooling air cores in the first communication mode, thereby increasing the heat exchange area of ​​the thermal management system under cabin cooling conditions, thereby improving the efficiency of the thermal management system. Similarly, through adjustment of the first multi-way valve 10, both the first and second in-cabin heat exchangers 101, 102 can function as heating air cores in the second communication mode, thereby increasing the heat exchange area of ​​the thermal management system under cabin heating conditions, thereby improving the efficiency of the thermal management system.

[0045] Secondly, through the adjustment of the first multi-way valve 10, the first cabin heat exchanger 101 and the second cabin heat exchanger 102 serve as the cold air core and the warm air core respectively, which can remove moisture from the air inside the cabin without causing a sharp change in the temperature inside the cabin. That is, it can simultaneously meet more diverse load requirements, such as heating load and cooling load, under the cabin dehumidification condition, thereby improving the user experience of the thermal management system.

[0046] The technical solution of the present invention, through the adjustment of the first multi-way valve 10, makes it no longer necessary for the first cabin heat exchanger 101 and the second cabin heat exchanger 102 to be clearly distinguished as a cold air core and a warm air core. The functions can be flexibly changed to function simultaneously in the same connection mode, and the heat exchange area of ​​the thermal management system under the cabin heating condition can be increased, thereby improving the efficiency of the thermal management system.

[0047] Of course, the embodiments of the present invention do not limit the number of cabin heat exchangers. That is, the secondary circuit thermal management system may further include a third cabin heat exchanger, a fourth cabin heat exchanger, and the like. Furthermore, in the first connection mode, the third cabin heat exchanger, the fourth cabin heat exchanger, and the like may all function as cooling cores, or some may function as cooling cores while others are inoperative, or some may function as cooling cores while others function as heating cores. Those skilled in the art may make adaptive adjustments based on design requirements.

[0048] It should be noted that the multiple in-cabin heat exchangers, including the first in-cabin heat exchanger 101 and the second in-cabin heat exchanger 102, are not necessarily installed inside the cabin. They can also be installed outside the cabin and connected to the cabin interior through structures such as ventilation ducts to achieve cabin air conditioning. Of course, these in-cabin heat exchangers can also be partially installed inside the cabin and partially installed outside the cabin.

[0049] Please refer to Figures 1 to 5 Optionally, the vehicle further includes a bellows 105 and a blower 106. The blower 106 is capable of driving air from the bellows 105 into the cabin. The first and second cabin heat exchangers 101, 102 are disposed within the bellows 105. Thus, utilizing the bellows 105 to house the first and second cabin heat exchangers 101, 102 allows the airflow passing through the bellows 105 to fully exchange heat with the first and second cabin heat exchangers 101, 102, thereby improving heat exchange efficiency. Of course, in other embodiments, the bellows 105 and blower 106 may be omitted.

[0050] Optionally, the first cabin heat exchanger 101 is located downstream of the second cabin heat exchanger 102 in the direction of air flow into the cabin. Thus, in the third mode, the first cabin heat exchanger 101 functions as a heating core and the second cabin heat exchanger 102 functions as a cooling core. Airflow first flows through the second cabin heat exchanger 102, where the coolant temperature is lower than the dew point of the airflow, thus dehumidifying the airflow. The dehumidified airflow then flows through the first cabin heat exchanger 101, where the coolant temperature is higher than the airflow, thus heating the airflow. This improves dehumidification efficiency and reduces significant cabin temperature fluctuations.

[0051] Of course, in other embodiments, the second cabin heat exchanger 102 may be located downstream of the first cabin heat exchanger 101 in the direction of air flowing into the cabin, or the second cabin heat exchanger 102 and the first cabin heat exchanger 101 may be arranged side by side.

[0052] Further optionally, the fan 106 is disposed within the bellows 105 and upstream of the second cabin heat exchanger 102. Thus, locating the fan 106 within the bellows 105 can make the thermal management system more compact and occupy a smaller volume. Secondly, locating the fan 106 upstream of the second cabin heat exchanger 102 can place the fan 106 in an environment with a relatively stable air temperature, preventing the fan 106 from experiencing sudden changes in temperature or large temperature fluctuations, thereby improving the service life of the fan 106. Of course, in other embodiments, the fan 106 can be disposed outside the bellows 105, or between the first cabin heat exchanger 101 and the second cabin heat exchanger 102, or downstream of the first cabin heat exchanger 101.

[0053] Optionally, the first multi-way valve 10 is configured as an eight-way valve. Of course, in other embodiments, the first multi-way valve 10 can also be configured as a control valve with a greater number of interfaces, such as a nine-way valve or a ten-way valve, or a control valve with a smaller number of interfaces, such as a six-way valve or a seven-way valve.

[0054] Specifically, optionally, the first multi-way valve 10 has at least a first interface 11, a second interface 12, a third interface 13, a fourth interface 14, a fifth interface 15, a sixth interface 16, a seventh interface 17 and an eighth interface 18. The first interface 11 is connected to the water inlet end of the first cabin heat exchanger 101, the second interface 12 is connected to the water outlet end of the first cabin heat exchanger 101, the third interface 13 is connected to the water inlet end of the second cabin heat exchanger 102, the fourth interface 14 is connected to the water outlet end of the second cabin heat exchanger 102, the fifth interface 15 is connected to the water inlet end of the water-cooled evaporator 104, the sixth interface 16 is connected to the water outlet end of the water-cooled evaporator 104, the seventh interface 17 is connected to the water outlet end of the water-cooled condenser 103, and the eighth interface 18 is connected to the water inlet end of the water-cooled condenser 103.

[0055] Please refer to Figure 2 In this embodiment, optionally, in the first connectivity mode, the first interface 11 is connected to the sixth interface 16, the second interface 12 is connected to the third interface 13, and the fourth interface 14 is connected to the fifth interface 15; the seventh interface 17 is connected to the eighth interface 18 or not.

[0056] Specifically, in the first connection mode of this embodiment, the fifth and sixth ports 15, 16 of the first multi-way valve 10 are both connected to the water-cooled evaporator 104. The coolant, cooled by the water-cooled evaporator 104, flows into the sixth port 16 of the first multi-way valve 10, then flows out of the first port 11 and into the first cabin heat exchanger 101, cooling the cabin air. After flowing out of the first cabin heat exchanger 101, the coolant flows into the second port 12 of the first multi-way valve 10, then out of the third port 13 and into the second cabin heat exchanger 102, further cooling the cabin air. After flowing out of the second cabin heat exchanger 102, the coolant flows into the fourth port 14 of the first multi-way valve 10, then out of the fifth port 15 and back to the water-cooled evaporator 104, continuing the next flow cycle.

[0057] Please refer to Figure 3 and Figure 4 In this embodiment, optionally, in the second connectivity mode, the first interface 11 is connected to the seventh interface 17, the second interface 12 is connected to the third interface 13, and the fourth interface 14 is connected to the eighth interface 18; the fifth interface 15 is connected to the sixth interface 16 or not.

[0058] Specifically, in the second connection mode of this embodiment, the seventh and eighth ports 17, 18 of the first multi-way valve 10 are both connected to the water-cooled condenser 103. The coolant, heated by the water-cooled condenser 103, flows into the seventh port 17 of the first multi-way valve 10, then flows out of the first port 11 and into the first cabin heat exchanger 101, heating the cabin air. After flowing out of the first cabin heat exchanger 101, the coolant flows into the second port 12 of the first multi-way valve 10, then out of the third port 13 and into the second cabin heat exchanger 102, further heating the cabin air. After flowing out of the second cabin heat exchanger 102, the coolant flows into the fourth port 14 of the first multi-way valve 10, then out of the eighth port 18 and back to the water-cooled condenser 103, continuing the next flow cycle.

[0059] Of course, the second connection mode can also be other forms of coolant circuit. For example, in this embodiment, optionally, the second connection mode includes a conventional heating mode and a water system short-circuit mode. The second connection mode mentioned above is a conventional heating mode. That is, please refer to Figure 3 In the conventional heating mode, the first interface 11 is connected to the seventh interface 17, the second interface 12 is connected to the third interface 13, and the fourth interface 14 is connected to the eighth interface 18; the fifth interface 15 is connected to the sixth interface 16 or not.

[0060] Please refer to Figure 4In the water system short-circuit mode, the first interface 11 is connected to the seventh interface 17, the second interface 12 is connected to the third interface 13, the fourth interface 14 is connected to the fifth interface 15, and the sixth interface 16 is connected to the eighth interface 18.

[0061] Specifically, in the water system short-circuit mode of this embodiment, the seventh and eighth ports 17, 18 of the first multi-way valve 10 are both connected to the water-cooled condenser 103. Coolant heated by the water-cooled condenser 103 flows into the seventh port 17 of the first multi-way valve 10, then flows out of the first port 11 and into the first cabin heat exchanger 101, heating the cabin air. After flowing out of the first cabin heat exchanger 101, the coolant flows into the second port 12 of the first multi-way valve 10, then out of the third port 13 and into the second cabin heat exchanger 102, further heating the cabin air. After flowing out of the second cabin heat exchanger 102, the coolant flows into the fourth port 14 of the first multi-way valve 10, then out of the fifth port 15 and into the water-cooled evaporator 104. After being cooled by the water-cooled evaporator 104, the coolant flows into the sixth port 16, then out of the eighth port 18 and back to the water-cooled condenser 103, continuing the next flow cycle.

[0062] It can be understood that, whether in conventional heating mode or water system short-circuit mode, both the first cabin heat exchanger 101 and the second cabin heat exchanger 102 serve as the heater core. The former, however, has a shorter coolant circuit path (i.e., a larger water system), making it suitable for steady-state, rapid startup. The latter, on the other hand, has a shorter coolant circuit path (i.e., a smaller water system), and the refrigerant heat converted by the work of the compressor 201 is partially recovered via the water-cooled evaporator 104. In this state, the heat output to the cabin is essentially equal to the electrical power of the compressor 201. Therefore, this mode is suitable for use in low-temperature environments.

[0063] Please refer to Figure 5 In this embodiment, optionally, in the third connectivity mode, the first interface 11 is connected to the seventh interface 17 , the second interface 12 is connected to the eighth interface 18 , the third interface 13 is connected to the sixth interface 16 , and the fourth interface 14 is connected to the fifth interface 15 .

[0064] Specifically, in the third communication mode of this embodiment, the seventh port 17 and the eighth port 18 of the first multi-way valve 10 are both connected to the water-cooled condenser 103 , and the fifth port 15 and the sixth port 16 are both connected to the water-cooled evaporator 104 .

[0065] On the one hand, the coolant heated by the water-cooled condenser 103 flows into the seventh port 17 of the first multi-way valve 10, then flows out of the first port 11 and into the first cabin heat exchanger 101, thereby heating the cabin air. After flowing out of the first cabin heat exchanger 101, the coolant flows into the second port 12 of the first multi-way valve 10, then flows out of the eighth port 18 and back to the water-cooled condenser 103, continuing the next flow cycle.

[0066] Meanwhile, the coolant, having been cooled by water-cooled evaporator 104, flows into sixth port 16 of first multi-way valve 10, then out through third port 13 and into second cabin heat exchanger 102, cooling the cabin air. After exiting second cabin heat exchanger 102, the coolant flows into fourth port 14 of first multi-way valve 10, then out through fifth port 15 and back into water-cooled evaporator 104, continuing the next flow cycle.

[0067] Of course, in other embodiments, in the third communication mode, the first in-cabin heat exchanger 101 may serve as a cold air core and the second in-cabin heat exchanger 102 may serve as a warm air core.

[0068] Please refer to Figures 6 to 8 In the second embodiment, based on the structure of the first embodiment, the secondary circuit thermal management system further includes an interconnected offboard heat exchanger 112, a battery system 110, an electric drive system 111, and a second multi-way valve 20. The second multi-way valve 20 has at least three communication modes. The communication modes of the first multi-way valve 10 and the second multi-way valve 20 can be combined to switch the communication modes of the coolant circuit. This allows the coolant circuit to achieve more communication modes, thereby increasing the system's operating modes and design flexibility to meet more diverse usage needs, thereby improving the user experience of the thermal management system.

[0069] Specifically, optionally, the second multi-way valve 20 has at least an eleventh interface 21, a twelfth interface 22, a thirteenth interface 23, a fourteenth interface 24, a fifteenth interface 25, a sixteenth interface 26, and a seventeenth interface 27. The eleventh interface 21 is connected to the water inlet end of the water-cooled condenser 103, the twelfth interface 22 is connected to the water outlet end of the water-cooled condenser 103, the thirteenth interface 23 is connected to the water inlet end of the water-cooled evaporator 104, the fourteenth interface 24 is connected to the water outlet end of the water-cooled evaporator 104, the fifteenth interface 25 is connected to the water inlet end of the outboard heat exchanger 112, the sixteenth interface 26 is connected to the water outlet end of the outboard heat exchanger 112 and the water inlet end of the electric drive system 111, and the seventeenth interface 27 is connected to the water outlet end of the electric drive system 111.

[0070] Preferably, the second multi-way valve 20 is configured as a seven-way valve. Of course, in other embodiments, the second multi-way valve 20 can also be configured as an eight-way valve, a nine-way valve, or other control valve with a greater number of ports, or can also be configured as a five-way valve, a six-way valve, or other control valve with a smaller number of ports.

[0071] Please refer to Figures 9 to 12 Optionally, the connectivity mode of the second multi-way valve 20 includes a first conduction mode, a second conduction mode, a third conduction mode, and a fourth conduction mode. The first conduction mode is used to dissipate heat from the water-cooled condenser 103 alone, the second conduction mode is used to dissipate heat from the water-cooled condenser 103 and the electric drive system 111, and the third conduction mode is used to recover heat from the electric drive system 111 and / or the offboard heat exchanger 112; the fourth conduction mode is used to dissipate heat or store heat from the electric drive system 111.

[0072] For details, please refer to Figure 9 In the first conduction mode, the eleventh port 21 of the second multi-way valve 20 is connected to the sixteenth port 26, the twelfth port 22 is connected to the fifteenth port 25, and the thirteenth port 23 is connected to the fourteenth port 24. Figure 10 In the second conduction mode, the eleventh port 21 of the second multi-way valve 20 is connected to the seventeenth port 27, the twelfth port 22 is connected to the fifteenth port 25, and the thirteenth port 23 is connected to the fourteenth port 24. Figure 11 In the third conduction mode, the thirteenth port 23 of the second multi-way valve 20 is connected to the seventeenth port 27, and the fourteenth port 24 is connected to the fifteenth port 25. Figure 12 In the fourth conduction mode, the thirteenth port 23 of the second multi-way valve 20 is connected to the fourteenth port 24 , and the fifteenth port 25 is connected to the seventeenth port 27 .

[0073] Please refer to Figure 6 The secondary circuit thermal management system also includes a third multi-way valve 30 and a fourth multi-way valve 40. The third multi-way valve 30 has at least a twenty-first interface 31, a twenty-second interface 32 and a twenty-third interface 33. The twenty-first interface 31 is connected to the water outlet of the water-cooled condenser 103, the twenty-second interface 32 is connected to the twelfth interface 22, and the twenty-third interface 33 is connected to the seventh interface 17. The twenty-first interface 31 can be selectively connected to the twenty-second interface 32 and / or the twenty-third interface 33.

[0074] That is, the third multi-way valve 30 has three states. In its first state, the twenty-first interface 31 is connected to the twenty-second interface 32 and the twenty-third interface 33. In its second state, the twenty-first interface 31 is connected to the twenty-second interface 32 but not to the twenty-third interface 33. In its third state, the twenty-first interface 31 is not connected to the twenty-second interface 32 but to the twenty-third interface 33.

[0075] The fourth multi-way valve 40 has at least a thirty-first interface 41, a thirty-second interface 42 and a thirty-third interface 43. The thirty-first interface 41 is connected to the water outlet of the water-cooled evaporator 104, the thirty-second interface 42 is connected to the sixth interface 16, and the thirty-third interface 43 is connected to the water inlet of the battery system 110. The thirty-first interface 41 can be selectively connected to the thirty-second interface 42 and / or the thirty-third interface 43; the coolant circuit also includes a battery bypass branch, which is connected between the fifth interface 15 and the fourteenth interface 24.

[0076] That is, the fourth multi-way valve 40 has three states. In its first state, the thirty-first interface 41 is connected to the thirty-second interface 42 and the thirty-third interface 43. In its second state, the thirty-first interface 41 is connected to the thirty-second interface 42 but not to the thirty-third interface 43. In its third state, the thirty-first interface 41 is not connected to the thirty-second interface 42 but to the thirty-third interface 43.

[0077] Specifically, optionally, the third multi-way valve 30 and / or the fourth multi-way valve 40 are configured as three-way valves, and the three-way valves can be proportionally adjusted.

[0078] Please refer to Figure 6 In one embodiment, optionally, the secondary circuit thermal management system further includes a first water pump 107, a second water pump 108 and a third water pump 109, the water inlet of the first water pump 107 being connected to the eighth interface 18 and the eleventh interface 21, and the water outlet of the first water pump 107 being connected to the water inlet of the water-cooled condenser 103; the water inlet of the second water pump 108 being connected to the thirteenth interface 23, and the water outlet of the second water pump 108 being connected to the water inlet of the water-cooled evaporator 104; the water inlet of the third water pump 109 being connected to the sixteenth interface 26 and the water outlet of the offboard heat exchanger 112, and the water outlet of the third water pump 109 being connected to the water inlet of the electric drive system 111. Of course, in other embodiments, only one or two of the first water pump 107, the second water pump 108 and the third water pump 109 may be provided as needed, or none of the first water pump 107, the second water pump 108 and the third water pump 109 may be provided, and the combined adjustment of the valve group may be used to achieve the conduction or cutoff of certain coolant circuits.

[0079] It is understood that each multi-way valve in the valve group consisting of the first multi-way valve 10, the second multi-way valve 20, the third multi-way valve 30, and the fourth multi-way valve 40 is capable of independent operation, allowing their respective communication modes to be arranged and combined to achieve at least twenty operating modes of the coolant circuit. Two operating modes are listed below for illustration. Those skilled in the art can deduce the remaining operating modes and their functions and select the appropriate operating mode based on design requirements.

[0080] Please refer to Figure 7 When both the cabin and the battery require cooling, the coolant circuit enters the first operating mode. That is, the refrigerant circuit operates as a normal circulation loop. The first multi-way valve 10 is in the first connection mode, the second multi-way valve 20 is in the first conduction mode, the third multi-way valve 30 is in its second state, and the fourth multi-way valve 40 is in its first state. In this case, the seventh port 17 is preferably disconnected from the eighth port 18. However, connecting the seventh port 17 and the eighth port 18 is also an option.

[0081] Specifically, when the coolant circuit enters the first working mode, the first water pump 107 is in the running mode, and the coolant flowing out of the first water pump 107 flows through the water-cooled condenser 103, the third multi-way valve 30, the second multi-way valve 20, and the off-cabin heat exchanger 112 in sequence, and flows back to the first water pump 107 to form a first water circuit, thereby dissipating the heat dissipated by the refrigerant in the water-cooled condenser 103 to the environment through the coolant in the off-cabin heat exchanger 112.

[0082] When the coolant circuit enters the first operating mode, the second water pump 108 is in operation, forming a second water circuit and a third water circuit. The second water circuit consists of coolant flowing out of the second water pump 108, which flows sequentially through the water-cooled evaporator 104, the fourth multi-way valve 40, the first multi-way valve 10, the first in-cabin heat exchanger 101, the first multi-way valve 10, the second in-cabin heat exchanger 102, the first multi-way valve 10, the second multi-way valve 20, and finally returns to the second water pump 108. The second water circuit consists of coolant flowing out of the second water pump 108, which flows sequentially through the water-cooled evaporator 104, the fourth multi-way valve 40, the battery system 110, the second multi-way valve 20, and finally returns to the second water pump 108. In this way, the second and third water circuits can distribute the coolant cooled by the water-cooled evaporator 104 to the cabin and the battery system 110, thereby achieving simultaneous cooling of the cabin and the battery system 110.

[0083] Optionally, the proportional adjustment of the fourth multi-way valve 40 can be dynamically adjusted according to the cooling load requirements of the cabin and the battery to achieve flow distribution of the coolant flowing from the thirty-first interface 41 to the thirty-second interface 42 and the thirty-third interface 43.

[0084] It can be understood that, based on the first operating mode, when the fourth multi-way valve 40 is switched to its second state, a single cabin cooling function can be achieved. Similarly, based on the first operating mode, when the fourth multi-way valve 40 is switched to its third state, a single battery cooling function can be achieved.

[0085] Please refer to Figure 8When cabin heating is required, the coolant circuit enters the second operating mode. That is, the refrigerant circuit operates in a conventional circulation mode. The first multi-way valve 10 is in the second communication mode, the second multi-way valve 20 is in the third communication mode, the third multi-way valve 30 is in its third state, and the fourth multi-way valve 40 is in its second state. At this time, the fifth port 15 is connected to the sixth port 16.

[0086] Specifically, when the coolant circuit enters the second working mode, the first water pump 107 is in the running mode, so that the coolant flowing out of the first water pump 107 flows through the water-cooled condenser 103, the third multi-way valve 30, the first multi-way valve 10, the first cabin heat exchanger 101, the first multi-way valve 10, the second cabin heat exchanger 102, the first multi-way valve 10 in sequence, and flows back to the first water pump 107 to form a first water circuit, so that the heat dissipated by the refrigerant in the water-cooled condenser 103 is dissipated to the cabin through the first cabin heat exchanger 101 and the second cabin heat exchanger 102, thereby achieving cabin heating.

[0087] When the coolant circuit enters the second working mode, the second water pump 108 and the third water pump 109 are in the running mode, so that the coolant flows through the second water pump 108, the water-cooled evaporator 104, the fourth multi-way valve 40, the first multi-way valve 10, the second multi-way valve 20, the outboard heat exchanger 112, the third water pump 109, the electric drive system 111, the second multi-way valve 20 in sequence, and flows back to the second water pump 108 to form a second water circuit, so that the coolant absorbs heat from the outboard air at the outboard heat exchanger 112 in sequence, recovers the waste heat of the electric drive system 111 at the electric drive system 111, and then transfers the heat to the refrigerant in the water-cooled evaporator 104, thereby realizing the heat pump heating function.

[0088] It is understood that, based on the second working mode, when the fourth multi-way valve 40 is switched to its third state, the coolant can be further used to recover heat from the battery system 110 at the battery system 110. At this time, the fifth port 15 and the sixth port 16 are not connected.

[0089] The present invention also provides a vehicle including a cabin and a secondary circuit thermal management system. The specific structure of the secondary circuit thermal management system refers to the above-mentioned embodiments. Since this vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0090] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A secondary circuit thermal management system, applied to a vehicle, characterized in that: The secondary circuit thermal management system includes: refrigerant circuit; and a coolant circuit comprising a first in-cabin heat exchanger, a second in-cabin heat exchanger, a water-cooled condenser, a water-cooled evaporator, and a first multi-way valve, wherein the coolant circuit can form at least three communication modes under the regulation of the first multi-way valve; In a first connectivity mode, the first in-cabin heat exchanger and the second in-cabin heat exchanger are connected to the water-cooled evaporator and cool the vehicle cabin; in a second connectivity mode, the first in-cabin heat exchanger and the second in-cabin heat exchanger are connected to the water-cooled condenser and heat the cabin; in a third connectivity mode, the first in-cabin heat exchanger is connected to the water-cooled evaporator and cools the cabin, and the second in-cabin heat exchanger is connected to the water-cooled condenser and heats the cabin.

2. The secondary circuit thermal management system according to claim 1, wherein: The first multi-way valve has at least a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface and an eighth interface. The first interface is connected to the water inlet of the first cabin heat exchanger, the second interface is connected to the water outlet of the first cabin heat exchanger, the third interface is connected to the water inlet of the second cabin heat exchanger, the fourth interface is connected to the water outlet of the second cabin heat exchanger, the fifth interface is connected to the water inlet of the water-cooled evaporator, the sixth interface is connected to the water outlet of the water-cooled evaporator, the seventh interface is connected to the water outlet of the water-cooled condenser, and the eighth interface is connected to the water inlet of the water-cooled condenser.

3. The secondary circuit thermal management system according to claim 2, characterized in that: In the first connectivity mode, the first interface is connected to the sixth interface, the second interface is connected to the third interface, and the fourth interface is connected to the fifth interface; the seventh interface is connected to the eighth interface or not.

4. The secondary circuit thermal management system according to claim 2, wherein: In the second connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the third interface, and the fourth interface is connected to the eighth interface; the fifth interface is connected to the sixth interface or not.

5. The secondary circuit thermal management system according to claim 2, wherein: In the second connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the third interface, the fourth interface is connected to the fifth interface, and the sixth interface is connected to the eighth interface.

6. The secondary circuit thermal management system according to claim 2, wherein: In the third connectivity mode, the first interface is connected to the seventh interface, the second interface is connected to the eighth interface, the third interface is connected to the sixth interface, and the fourth interface is connected to the fifth interface.

7. The secondary circuit thermal management system according to claim 1, wherein: The vehicle further includes a bellows and a blower, wherein the blower is capable of driving air from the bellows into the cabin. The first cabin heat exchanger and the second cabin heat exchanger are disposed in the bellows, and the first cabin heat exchanger is located downstream of the second cabin heat exchanger.

8. The secondary circuit thermal management system according to claim 7, wherein: The fan is arranged in the wind box and upstream of the second cabin heat exchanger.

9. The secondary circuit thermal management system according to any one of claims 1 to 8, characterized in that: The first multi-way valve is configured as an eight-way valve.

10. A vehicle, characterized in that: It comprises a cockpit and a secondary circuit thermal management system as described in any one of claims 1 to 9.

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