Thermal management system, control method and vehicle

Abstract

The invention provides a thermal management system, a control method and a vehicle. The thermal management system comprises a refrigerant circulation system, a cooling liquid circulation system and a tail end heat exchange assembly. The refrigerant circulating system comprises a first heat exchanger and a second heat exchanger; the heating flow path flows through the first heat exchanger, and the refrigerating flow path flows through the second heat exchanger. The tail end heat exchange assemblies comprise at least two first tail end heat exchange assemblies, each first tail end heat exchange assembly comprises a first tail end component and a first switching valve, each first switching valve is provided with a first passage, a second passage and a communicating loop, and the first passages, the second passages and the communicating loops are separated from one another; or the communication loop communicates with the first passage to form a first heat exchange flow path; or the communication loop communicates with the second passage to form a second heat exchange flow path. Due to the fact that the first switching valve is provided with the multiple different channels, the communication relations between the channels are different, the number of tail end components can be increased, and richer heat management mode switching is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular relates to a thermal management system, a control method and a vehicle. Background Art

[0002] At present, with the development of new energy vehicles, the thermal management system of vehicles is becoming more and more important. Current new energy vehicles not only need to control the temperature of motors, batteries, passenger compartments, etc., but also need to control the temperature of other components and locations as the functions of new energy vehicles increase and the comfort improves. The coolant flow path of the thermal management system usually requires a multi-way valve to switch the working mode. With the increase of terminal components, the structure of the multi-way valve is complex and the development cost is high. In addition, one set of thermal management system corresponds to one multi-way valve, but when adding terminal components, the original multi-way valve cannot be used and the multi-way valve needs to be reset, which greatly increases the development time and cost. Therefore, it is particularly important to solve the problem of minimizing the structural changes when adding new terminal components from the thermal management system. Summary of the invention

[0003] The present invention provides a thermal management system, a control method and a vehicle, which can solve the technical problem that when a terminal component is added to the existing thermal management system, a multi-way valve cannot be used and the multi-way valve needs to be redesigned.

[0004] The present invention provides a thermal management system, which includes a refrigerant circulation system, a coolant circulation system and a terminal heat exchange component;

[0005] The refrigerant circulation system comprises a first heat exchanger and a second heat exchanger;

[0006] The coolant circulation system has a heating flow path and a cooling flow path, the heating flow path flows through the first heat exchanger, and the cooling flow path flows through the second heat exchanger;

[0007] The terminal heat exchange assembly includes at least two first terminal heat exchange assemblies, the first terminal heat exchange assembly includes a first terminal component and a first switching valve, the first switching valve is provided with a first passage, a second passage and a communication circuit, the first passage, the second passage and the communication circuit are isolated from each other, the inlet and outlet of the first passage are respectively communicated with the inlet and outlet of the heating flow path, and the inlet and outlet of the second passage are respectively communicated with the inlet and outlet of the cooling flow path;

[0008] or the communication circuit is connected with the first passage to form a first heat exchange flow path, the inlet and outlet of the first heat exchange flow path are respectively connected with the inlet and outlet of the heating flow path, and the coolant in the first heat exchange flow path flows through the first terminal component;

[0009] Or the communicating circuit is connected to the second passage to form a second heat exchange flow path, the inlet and outlet of the second heat exchange flow path are respectively connected to the inlet and outlet of the refrigeration flow path, and the coolant in the second heat exchange flow path flows through the first terminal component.

[0010] In some embodiments, the first switching valve has a first state, a second state and a third state, and the first state, the second state and the third state are switchably arranged. When the first switching valve is in the first state, the cooling flow path, the heating flow path and the connecting circuit are isolated from each other, the inlet and the outlet of the first passage are respectively connected to the inlet and the outlet of the heating flow path, and the inlet and the outlet of the second passage are respectively connected to the inlet and the outlet of the cooling flow path;

[0011] When the first switching valve is in the second state, the communication circuit is connected with the first passage to form a first heat exchange flow path, the inlet and outlet of the first heat exchange flow path are respectively connected with the inlet and outlet of the heating flow path, and the refrigerant in the first heat exchange flow path flows through the first terminal component; the inlet and outlet of the second passage are respectively connected with the inlet and outlet of the cooling flow path;

[0012] When the first switching valve is in the third state, the connecting circuit is connected with the second passage to form a second heat exchange flow path, the inlet and outlet of the second heat exchange flow path are respectively connected with the inlet and outlet of the refrigeration flow path, and the refrigerant in the second heat exchange flow path flows through the first terminal component; the inlet and outlet of the first passage are respectively connected with the inlet and outlet of the heating flow path.

[0013] In some embodiments, the first switching valve includes a valve core and a valve seat, the valve core is provided with the first passage, the second passage and the connecting circuit, the valve seat is provided with a plurality of conducting valve ports, the inlets and outlets of the first passage, the second passage and the connecting circuit are respectively provided corresponding to the conducting valve ports, and the valve core is rotatably provided in the valve seat so as to be switchable between the first state, the second state and the third state.

[0014] In some embodiments, a plurality of first grooves and second grooves are arranged on the outer peripheral wall of the valve core, the first grooves are arranged horizontally, the second grooves are arranged vertically, and the two ends of the first grooves are arranged corresponding to the conduction valve ports, and the two ends of the second grooves are arranged corresponding to the conduction valve ports.

[0015] The valve core has three rotation positions. When the valve core is at the first rotation position, the first switching valve is in the first state. Three first grooves that are not connected to each other are arranged side by side on the circumferential outer wall of the valve core. The three first grooves are respectively the first passage, the communication circuit and the second passage.

[0016] When the valve core is located at the second rotation position, the first switching valve is in the second state, and two second grooves arranged in parallel are provided on the circumferential outer wall of the valve core, and one first groove is provided below the second groove in the vertical direction of the second groove, and the two second grooves are connected with the pipeline to form the first heat exchange flow path, and the first groove is the second passage;

[0017] When the valve core is located at the third rotation position, the first switching valve is in the third state, and two second grooves arranged in parallel are provided on the circumferential outer wall of the valve core. In the vertical direction of the second groove, one first groove is provided above the second groove, and the two second grooves are connected with the pipeline to form the second heat exchange path, and the first groove is the first passage.

[0018] In some embodiments, the terminal heat exchange assembly includes three first terminal heat exchange assemblies arranged in series in sequence, the first terminal component of the first first terminal heat exchange assembly is a motor electronic control, the first terminal component of the second first terminal heat exchange assembly is a third heat exchanger arranged outside the vehicle, and the first terminal component of the third first terminal heat exchange assembly is a battery.

[0019] In some embodiments, the terminal heat exchange component also includes at least two second terminal heat exchange components, the second terminal heat exchange component includes a second terminal component, a second switching valve and a third heat exchange circuit, the second switching valve is a three-way valve, the first valve port of the second switching valve is connected to the inlet of the heating flow circuit or the inlet of the cooling flow circuit, the second valve port of the second switching valve is connected to the inlet of the third heat exchange circuit, the third valve port of the second switching valve is connected to the outlet of the heating flow circuit or the outlet of the cooling flow circuit, the outlet of the third heat exchange circuit is connected to the outlet of the heating flow circuit or the outlet of the cooling flow circuit, and a one-way valve is provided at the connection point.

[0020] In some embodiments, the terminal heat exchange component includes two second terminal heat exchange components, the second terminal component of the first second terminal heat exchange component is a heating heat exchanger arranged in the vehicle, the first valve port of the first second switching valve is connected to the inlet of the heating flow path, the second valve port of the first second switching valve is connected to the inlet of the third heat exchange circuit, the third valve port of the first second switching valve is connected to the outlet of the heating flow path, the outlet of the third heat exchange circuit is connected to the outlet of the heating flow path, and a one-way valve is provided at the connection point;

[0021] The second end component of the second second end heat exchange assembly is a refrigeration heat exchanger arranged in the vehicle, the first valve port of the second second switching valve is connected to the inlet of the refrigeration flow circuit, the second valve port of the second second switching valve is connected to the inlet of the third heat exchange circuit, the third valve port of the second second switching valve is connected to the outlet of the refrigeration flow circuit, the outlet of the third heat exchange circuit is connected to the outlet of the refrigeration flow circuit, and a one-way valve is provided at the connection point.

[0022] In some embodiments, the refrigerant circulation system further includes a compressor, a gas-liquid separator, and an expansion valve, the first heat exchanger is a plate condenser, the second heat exchanger is a plate evaporator, and the compressor, the first heat exchanger, the expansion valve, the second heat exchanger, and the gas-liquid separator are sequentially arranged in series;

[0023] The first heat exchanger is provided with a first refrigerant channel and a first coolant channel, the heating flow path is provided in series with the first heat exchanger, the heating flow path is communicated with the coolant channel, and a first kettle and a first water pump are provided on the heating flow path;

[0024] The second heat exchanger is provided with a second refrigerant channel and a second coolant channel, the refrigeration flow path is arranged in series with the second heat exchanger, the refrigeration flow path is communicated with the second coolant channel, and a second kettle and a second water pump are arranged on the refrigeration flow path.

[0025] In some embodiments, the compressor, the gas-liquid separator, the expansion valve, the first heat exchanger, and the second heat exchanger are disposed outside a passenger compartment.

[0026] A control method, the control method is used to control the above-mentioned thermal management system, when the first switching valve has a first state, a second state and a third state, the terminal heat exchange component includes three first terminal heat exchange components arranged in series, the first terminal component of the first first terminal heat exchange component is a motor electronic control, the first terminal component of the second first terminal heat exchange component is a third heat exchanger arranged outside the vehicle, and the first terminal component of the third first terminal heat exchange component is a battery, the control method includes:

[0027] When heating is required in the vehicle, the first switching valve of the first first end heat exchange component is in the third state, the first switching valve of the second first end heat exchange component is in the first state, the first switching valve of the third first end heat exchange component is in the third state, the first valve port of the first second switching valve is connected to the inlet of the heating flow path, the second valve port of the first second switching valve is connected to the inlet of the third heat exchange circuit, the third valve port of the first second switching valve is disconnected from the outlet of the heating flow path, and the outlet of the third heat exchange circuit is connected to the outlet of the heating flow path; the first valve port of the second second switching valve is connected to the inlet of the cooling flow path, the second valve port of the second second switching valve is disconnected from the inlet of the third heat exchange circuit, and the third valve port of the second second switching valve is connected to the outlet of the cooling flow path;

[0028] When cooling is required in the vehicle, the first switching valve of the first first end heat exchange component is in the second state, the first switching valve of the second first end heat exchange component is in the second state, the first switching valve of the third first end heat exchange component is in the third state, the first valve port of the first second switching valve is connected to the inlet of the heating flow path, the second valve port of the first second switching valve is disconnected from the inlet of the third heat exchange circuit, and the third valve port of the first second switching valve is connected to the outlet of the heating flow path; the first valve port of the second second switching valve is connected to the inlet of the cooling flow path, the second valve port of the second second switching valve is connected to the inlet of the third heat exchange circuit, the third valve port of the second second switching valve is disconnected from the outlet of the cooling flow path, and the outlet of the third heat exchange circuit is connected to the outlet of the cooling flow path;

[0029] When charging below normal temperature, the first switching valve of the first first end heat exchange component is in the first state, the first switching valve of the second first end heat exchange component is in the second state, the first switching valve of the third first end heat exchange component is in the second state, the first valve port of the first second switching valve is connected to the inlet of the heating flow circuit, the second valve port of the first second switching valve is disconnected from the inlet of the third heat exchange circuit, and the third valve port of the first second switching valve is connected to the outlet of the heating flow circuit; the first valve port of the second second switching valve is connected to the inlet of the cooling flow circuit, the second valve port of the second second switching valve is disconnected from the inlet of the third heat exchange circuit, and the third valve port of the second second switching valve is connected to the outlet of the cooling flow circuit.

[0030] A vehicle includes a thermal management system, characterized in that the thermal management system is the thermal management system described above.

[0031] A thermal management system, a control method and a vehicle provided by the present invention have the following beneficial effects:

[0032] The first passage and the second passage of the present invention are respectively connected to the heating flow path and the cooling flow path, and do not flow through the first terminal component, but can also form heat exchange flow paths to flow through the first terminal component respectively. Since the first switching valve is provided with a plurality of different passages, the connectivity relationships between the passages are different, allowing the system to selectively deliver the coolant directly to the heating or cooling area as needed, thereby realizing different heat exchange flow paths, and the different connection methods of the above passages can be realized through one valve. In this way, when it is necessary to increase the first terminal component, it is only necessary to add another first switching valve. Combined with the first switching valve, the connectivity relationship can be adjusted according to different heat exchange requirements, which is conducive to increasing the number of terminal components and realizing richer thermal management mode switching, solving the problem that the newly added terminal components need to redevelop and set up a multi-way valve structure. In addition, this thermal management system can also control each terminal component relatively simply by controlling the first switching valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] Figure 1 is a schematic diagram of a thermal management system according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of a first switching valve in an embodiment of the present invention when it is in a first state;

[0036] Figure 3 It is a schematic diagram of a first switching valve in an embodiment of the present invention when it is in a second state;

[0037] Figure 4 It is a schematic diagram of the first switching valve in the embodiment of the present invention when it is in the third state;

[0038] Figure 5 is a schematic diagram of the structure of a first switching valve according to an embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the explosion of the first switching valve according to an embodiment of the present invention

[0040] Figure 7 A schematic diagram of the assembly of the valve core and the sealing member according to an embodiment of the present invention;

[0041] Figure 8It is a schematic diagram of a valve core in an embodiment of the present invention when it is located at a first rotation position;

[0042] Fig. 9 It is a schematic diagram of a valve core in an embodiment of the present invention when it is located at a second rotation position;

[0043] Fig.10 It is a schematic diagram of a valve core in an embodiment of the present invention when it is located at a third rotation position;

[0044] Fig.11 is a schematic diagram of a second terminal heat exchange component according to an embodiment of the present invention;

[0045] Fig.12 A schematic diagram of a thermal management system when heating is required in a vehicle according to an embodiment of the present invention;

[0046] Fig.13 A schematic diagram of a thermal management system when cooling is required in a vehicle according to an embodiment of the present invention;

[0047] Fig.14 Schematic diagram of a thermal management system when charging below room temperature according to an embodiment of the present invention.

[0048] Figure: 1-refrigeration cycle system; 101-first heat exchanger; 102-second heat exchanger; 103-compressor; 104-gas-liquid separator; 105-expansion valve; 31-heating flow path; 311-first kettle; 312-first water pump; 32-refrigeration flow path; 321-second kettle; 322-second water pump; 4-first terminal heat exchange component; 401-first terminal component; 402-first switching valve; 421- Valve core; 422-valve seat; 423-conducting valve port; 424-first groove; 425-second groove; 403-first passage; 404-second passage; 405-connecting loop; 406-first heat exchange flow path; 407-second heat exchange flow path; 5-second terminal heat exchange component; 501-second terminal component; 502-second switching valve; 503-third heat exchange loop; 504-one-way valve; 6-seal; 7-fan. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] See also Figure 1As shown, according to an embodiment of the present invention, a thermal management system is provided, including a refrigerant circulation system 1, a coolant circulation system and a terminal heat exchange component; the refrigerant circulation system 1 includes a first heat exchanger 101 and a second heat exchanger 102; the coolant circulation system has a heating flow path 31 and a cooling flow path 32, the heating flow path 31 flows through the first heat exchanger 101, and the cooling flow path 32 flows through the second heat exchanger 102; the terminal heat exchange component includes at least two first terminal heat exchange components 4, the first terminal heat exchange component 4 includes a first terminal component 401 and a first switching valve 402, the first switching valve 402 is provided with a first passage 403, a second passage 404 and a connecting circuit 405, and the first passage 403, the second passage 404 and the connecting circuit 405 are connected They are isolated from each other, the inlet and outlet of the first passage 403 are connected to the inlet and outlet of the heating flow path 31 respectively, and the inlet and outlet of the second passage 404 are connected to the inlet and outlet of the cooling flow path 32 respectively; or the connecting circuit 405 is connected to the first passage 403 to form a first heat exchange flow path 406, the inlet and outlet of the first heat exchange flow path 406 are connected to the inlet and outlet of the heating flow path 31 respectively, and the coolant in the first heat exchange flow path 406 flows through the first terminal component 401; or the connecting circuit 405 is connected to the second passage 404 to form a second heat exchange flow path 407, the inlet and outlet of the second heat exchange flow path 407 are connected to the inlet and outlet of the cooling flow path 32 respectively, and the coolant in the second heat exchange flow path 407 flows through the first terminal component 401.

[0054] Specifically, high-temperature refrigerant flows in the first heat exchanger 101. After the heating flow path 31 flows through the first heat exchanger 101, the high-temperature refrigerant exchanges heat with the coolant in the heating flow path 31, and the temperature of the coolant in the heating flow path 31 increases. Low-temperature refrigerant flows in the second heat exchanger 102. The low-temperature refrigerant exchanges heat with the coolant in the cooling flow path 32, and the temperature of the coolant in the cooling flow path 32 decreases. When the first passage 403, the second passage 404 and the connecting loop 405 are isolated from each other, the inlet and outlet of the first passage 403 are connected to the inlet and outlet of the heating flow path 31 respectively, and the high-temperature coolant after heat exchange flows into the first passage 403 and flows out from the outlet of the first passage 403. At this time, since the coolant flows directly from the first switching valve 402, it does not flow through the first end component 401, that is, the coolant does not exchange heat with the first end component 401; the inlet and outlet of the second passage 404 are connected to the inlet and outlet of the refrigeration flow path 32 respectively, and the low-temperature coolant after heat exchange flows into the second passage 404 and flows out from the second passage 404. At this time, the coolant also flows out from the first switching valve 402 and does not flow through the first end component 401, that is, the coolant does not exchange heat with the first end component 401; and the connecting loop 405 at this time is neither connected to the first passage 403 nor to the second passage 404, and no coolant flows through the connecting loop 405 at this time.

[0055] Specifically, when the connecting loop 405 is connected with the first passage 403 to form the first heat exchange flow path 406, the inlet and outlet of the first heat exchange flow path 406 are respectively connected with the inlet and outlet of the heating flow path 31, and the coolant in the first heat exchange flow path 406 flows through the first terminal component 401. At this time, the high-temperature coolant after heat exchange will flow into the first heat exchange flow path 406 and flow through the first terminal component 401. After the high-temperature coolant exchanges heat with the first terminal component 401, it flows out of the first heat exchange flow path 406 and flows into the outlet of the heating flow path 31, continues to flow in the heating flow path 31 and exchanges heat with the first heat exchanger 101.

[0056] Specifically, when the connecting loop 405 is connected with the second passage 404 to form the second heat exchange flow path 407, the inlet and outlet of the second heat exchange flow path 407 are respectively connected with the inlet and outlet of the refrigeration flow path 32, and the coolant in the second heat exchange flow path 407 flows through the first terminal component 401. At this time, the low-temperature coolant after heat exchange will flow into the second heat exchange flow path 407 and flow through the first terminal component 401. After the low-temperature coolant exchanges heat with the first terminal component 401, it flows out of the second heat exchange flow path 407 and flows into the outlet of the refrigeration flow path 32, continues to flow in the refrigeration flow path 32 and exchanges heat with the second heat exchanger 102.

[0057] In this embodiment, the first passage 403 and the second passage 404 are respectively connected to the heating flow path 31 and the cooling flow path 32, and do not flow through the first terminal component 401, but can also form heat exchange flow paths to flow through the first terminal component 401 respectively. Since the first switching valve 402 is provided with a plurality of different passages, the connectivity relationships between the passages are different, allowing the system to selectively deliver the coolant directly to the heating or cooling area as needed, thereby realizing different heat exchange flow paths, and the different connection methods of the above passages can be realized through one valve. In this way, when it is necessary to increase the first terminal component 401, it is only necessary to add another first switching valve 402. Combined with the first switching valve 402, the connectivity relationship can be adjusted according to different heat exchange requirements, which is conducive to increasing the number of terminal components and realizing richer thermal management mode switching, solving the problem that the newly added terminal components need to redevelop and set up a multi-way valve structure. In addition, this thermal management system can also control each terminal component relatively simply by controlling the first switching valve 402.

[0058] In addition, because the system setup allows the end components to be added or removed without replacing the entire multi-port valve, development time and costs can be reduced. This setup reduces reliance on complex multi-port valve structures, simplifies system setup, reduces manufacturing and maintenance costs, and the end components can be easily expanded or reduced as needed to adapt to changing temperature control needs.

[0059] It is worth noting that in this embodiment, under the same state, the most preferred mode is that the communication circuit 405 is connected to the first passage 403 or the second passage 404, and the passage not connected to the communication circuit 405 is only passed by the high-temperature coolant or the low-temperature coolant. In other embodiments, the first passage 403 and the second passage 404 can also be connected to the communication circuit 405 at the same time, so that the high-temperature coolant and the low-temperature coolant are mixed and then flow through the first terminal component 401.

[0060] See also Figures 1 to 4 The first switching valve 402 has a first state, a second state and a third state, and is switchably arranged among the first state, the second state and the third state. When the first switching valve 402 is in the first state, the cooling flow path 32, the heating flow path 31 and the connecting loop 405 are isolated from each other, the inlet and outlet of the first passage 403 are respectively connected to the inlet and outlet of the heating flow path 31, and the inlet and outlet of the second passage 404 are respectively connected to the inlet and outlet of the cooling flow path 32; when the first switching valve 402 is in the second state, the connecting loop 405 is connected to the first passage 403 to form a first heat exchange flow path 406, and the inlet and outlet of the first heat exchange flow path 406 are connected to the inlet and outlet of the heating flow path 31. The outlet is respectively connected to the inlet and outlet of the heating flow path 31, and the coolant in the first heat exchange flow path 406 flows through the first terminal component 401; the inlet and outlet of the second passage 404 are respectively connected to the inlet and outlet of the cooling flow path 32; when the first switching valve 402 is in the third state, the connecting circuit 405 is connected to the second passage 404 to form a second heat exchange flow path 407, the inlet and outlet of the second heat exchange flow path 407 are respectively connected to the inlet and outlet of the cooling flow path 32, and the coolant in the second heat exchange flow path 407 flows through the first terminal component 401; the inlet and outlet of the first passage 403 are respectively connected to the inlet and outlet of the heating flow path 31.

[0061] Specifically, according to the requirements of the first end component 401 having a normal temperature working state, a heating working state and a cooling working state, the corresponding first switching valve 402 has a first state, a second state and a third state. The first switching valve 402 can flexibly adjust the state according to the heat exchange requirements of the first end component 401. When the first end component 401 does not need cooling and heating, the first switching valve 402 is in the first state, that is, the first end component 401 only needs to be maintained at a normal temperature state, and the coolant does not need to flow through the first end component 401. At this time, the inlet and outlet of the first passage 403 are respectively connected to the inlet and outlet of the heating flow path 31, and the inlet and outlet of the second passage 404 are respectively connected to the inlet and outlet of the cooling flow path 32, and the high-temperature coolant and the low-temperature coolant only need to flow out from the first switching valve 402. When the first end component 401 has a heating demand, the first switching valve 402 switches to the second state, at which time the connecting loop 405 is connected to the first passage 403 to form a first heat exchange flow path 406, in which high-temperature coolant flows, and the high-temperature coolant flows through the first end component 401, while the second passage 404 is no longer connected to the connecting loop 405, and the low-temperature coolant only flows through the first switching valve 402. When the first end component 401 has a cooling demand, the first switching valve 402 switches to the third state, at which time the connecting loop 405 is connected to the second passage 404 to form a second heat exchange flow path 407, in which low-temperature coolant flows, and the low-temperature coolant flows through the first end component 401, the first passage 403 is no longer connected to the connecting loop 405, and the high-temperature coolant only flows through the first switching valve 402.

[0062] In this embodiment, by switching the different states of the first switching valve 402, the three working states of normal temperature, heating and cooling of the first end component 401 can be controlled. This multi-mode control enables the thermal management system to be flexibly adjusted according to the specific needs of the first end component 401 to provide more precise temperature control. When cooling or heating is not required, the first state of the first switching valve 402 allows high-temperature and low-temperature coolants to flow directly through the first switching valve 402, avoiding unnecessary heat exchange, thereby improving the energy efficiency of the system; when the first end component 401 needs to be heated, the connecting circuit 405 is connected to the first passage 403 by switching to the second state to form a first heat exchange flow path 406, so that the high-temperature coolant flows through the first end component 401 to achieve heating. When cooling is required, the connecting circuit 405 is connected to the second passage 404 by switching to the third state to form a second heat exchange flow path 407, so that the low-temperature coolant flows through the first end component 401 to achieve cooling. In this embodiment, by setting the first passage 403, the second passage 404 and the connecting loop 405, the number of valves required in the system can be reduced and the system setting can be simplified. This setting reduces the complexity of pipelines and valves, and reduces the maintenance cost and failure rate of the system. Moreover, this setting allows the system to easily add more terminal heat exchange components when needed in the future without large-scale resetting of the entire thermal management system, thereby improving the adaptability and scalability of the system. Compared with valve structures such as two-way valves, three-way valves and four-way valves, the first switching valve 402 in this embodiment can reduce the number of valves and simplify the system setting to a certain extent, thereby reducing the manufacturing and maintenance costs of the system and improving cost-effectiveness. The first switching valve 402 in this embodiment has these three states and is also set according to the three most common requirements of the first terminal component 401. Compared with the valve structure with more than ten passages, it can simplify the valve structure on the basis of meeting the heat exchange requirements, thereby realizing the addition of the first terminal component 401 without changing the valve structure.

[0063] It is worth noting that in the present embodiment, when the first end component 401 has a heating demand, although the high-temperature coolant flows into the heating circuit and then flows through the first end component 401, when the temperature of the first end component 401 is higher than the temperature of the high-temperature coolant, the flowing high-temperature coolant is actually used to cool the first end component 401. The specific first end component 401 can be the motor electronic control and the battery. The operating temperatures of these two end components are higher than the temperature of the high-temperature coolant in the first heat exchange flow path 406.

[0064] See also Figures 1 to 7, characterized in that the first switching valve 402 includes a valve core 421 and a valve seat 422, the valve core 421 is provided with a first passage 403, a second passage 404 and a connecting loop 405, and a plurality of conducting valve ports 423 are provided on the valve seat 422, the inlets and outlets of the first passage 403, the second passage 404 and the connecting loop 405 are respectively provided corresponding to the conducting valve ports 423, and the valve core 421 is rotatably provided in the valve seat 422 so as to be switchable between the first state, the second state and the third state.

[0065] Specifically, six conducting valve ports 423 are provided on the valve seat 422 of the present embodiment, and the conducting valve ports 423 are arranged in 2 rows of 4. The first switching valve 402 needs to realize three states, and mutually independent valve core 421 and valve seat 422 are provided. The valve core 421 can rotate to realize different connection states. Each time the first switching valve 402 changes its state, the valve core 421 must rotate once.

[0066] In this embodiment, the arrangement of the valve core 421 and the valve seat 422 allows for precise control of the flow paths of the refrigerant and the coolant. By rotating the valve core 421, different paths (the first path 403, the second path 404, and the communication loop 405) can be precisely docked with the corresponding conduction valve port 423 to achieve precise control of the flow paths. The rotation of the valve core 421 enables the first switching valve 402 to switch between three different states to meet different temperature control requirements. This arrangement provides a simple and effective method to change the connection mode of the flow paths, thereby achieving different thermal management functions. Compared with a complex multi-way valve system, this setting realizes the switching of multiple flow paths through a rotatable valve core 421 and a fixed valve seat 422, simplifies the mechanical structure, reduces the number of components, and reduces manufacturing and maintenance costs. Since the setting of the valve core 421 and the valve seat 422 is relatively simple, the potential failure points are reduced, the reliability of the entire thermal management system is improved, and the response speed of the thermal management system to temperature changes is improved. In addition, by precisely controlling the flow path, unnecessary energy loss can be reduced. For example, when heat exchange is not required, the corresponding flow path can be cut off, thereby reducing energy consumption.

[0067] As a specific implementation, the structure of the first passage 403 and the second passage 404 can be a blind hole structure set in the valve core 421, and a related valve sheet can be set between the blind hole structures to control the on-off state, or a groove structure set on the circumferential outer wall of the valve core 421, and the two ends of the groove structure are respectively connected to the conduction valve port 423 to form a loop, or a combination of a blind hole structure and a groove structure, as long as the three states of the first switching valve 402 in this embodiment can be achieved. In order to facilitate the communication circuit 405 to flow through the first end component 401, the communication circuit 405 is provided with a related pipeline, and the pipeline flows through the first end component 401, or the first end component 401 is provided with a related pipeline, and the formed heat exchange circuit is connected to the pipeline of the first end component 401.

[0068] See also Figures 8 to 10 As shown, a plurality of first grooves 424 and second grooves 425 are arranged on the outer peripheral wall of the valve core 421, the first grooves 424 are arranged horizontally, the second grooves 425 are arranged vertically, and the two ends of the first grooves 424 are arranged corresponding to the conduction valve port 423, and the two ends of the second grooves 425 are arranged corresponding to the conduction valve port 423. The valve core 421 has three rotation positions. When the valve core 421 is located at the first rotation position, the first switching valve 402 is in the first state. Three first grooves 424 that are not connected to each other are arranged side by side on the circumferential outer wall of the valve core 421. The three first grooves 424 are respectively the first passage 403, the communication circuit 405 and the second passage 404; when the valve core 421 is located at the second rotation position, the first switching valve 402 is in the second state. state, two second grooves 425 arranged in parallel are provided on the circumferential outer wall of the valve core 421, and a first groove 424 is provided below the second groove 425 in the vertical direction of the second groove 425, the two second grooves 425 are connected with the pipeline to form a first heat exchange flow path 406, and the first groove 424 is the second passage 404; when the valve core 421 is located at the third rotation position, the first switching valve 402 is in the third state, two second grooves 425 arranged in parallel are provided on the circumferential outer wall of the valve core 421, and a first groove 424 is provided above the second groove 425 in the vertical direction of the second groove 425, the two second grooves 425 are connected with the pipeline to form a second heat exchange flow path 407, and the first groove 424 is the first passage 403.

[0069] Specifically, the first end component 401 only needs to maintain room temperature, the valve core 421 is located at the first rotation position, the first switching valve 402 is in the first state, and three first grooves 424 that are not connected to each other are arranged side by side on the circumferential outer wall of the valve core 421. From the top to the bottom of the valve core 421, the three first grooves 424 are respectively the first passage 403, the connecting loop 405 and the second passage 404, that is, one end of the first groove is the inlet of the first passage 403, and this end corresponds to a conduction valve port 423, and the inlet of the heating flow path 31 is connected to the conduction valve port 423. The other end of the first first groove 424 is the outlet of the first passage 403, and this end also corresponds to a conducting valve port 423. After the outlet of the heating flow path 31 is connected with the conducting valve port 423, combined with the structure of the first groove 424, the high-temperature coolant flows into one end of the first groove 424 and then flows out from the other end of the first groove 424; similarly, the structure of the third first groove 424 is the same as that of the first groove 424, except that the corresponding conducting valve port 423 must be connected to the cooling flow path 32, and at this time no coolant will flow into the connecting circuit 405.

[0070] Specifically, when the first end component 401 needs to heat, the valve core 421 is located at the second rotation position, the first switching valve 402 is in the second state, and two second grooves 425 arranged in parallel are provided on the circumferential outer wall of the valve core 421. In the vertical direction of the second grooves 425, the two second grooves 425 are connected with the pipeline to form the first heat exchange flow path 406. At this time, the upper end of the left second groove 425 is connected with the inlet of the heating flow path 31, and the coolant flows out from the lower end of the left second groove 425. After the coolant flows through the first end component 401 along the pipeline, the coolant flows into the lower end of the second groove 425 on the right side, the outlet of the heating flow path 31 is connected with the upper end of the second groove 425 on the right side, and the coolant flows into the heating circuit again; a first groove 424 is arranged below the second groove 425, and the first groove 424 is the second passage 404, that is, the left end of the first groove 424 is connected with the inlet of the cooling flow path 32, and the right end of the first groove 424 is connected with the outlet of the cooling flow path 32.

[0071] Specifically, when the first end component 401 needs to be cooled and the valve core 421 is located at the third rotation position, the first switching valve 402 is in the third state, and two second grooves 425 arranged in parallel are provided on the circumferential outer wall of the valve core 421. In the vertical direction of the second grooves 425, the two second grooves 425 are connected with the pipeline to form the second heat exchange flow path 407. At this time, the lower end of the left second groove 425 is connected with the inlet of the heating flow path 31, and the coolant flows out from the upper end of the left second groove 425. After the coolant flows through the first end component 401 along the pipeline, the coolant flows into the upper end of the second groove 425 on the right side, and the outlet of the heating flow path 31 is connected with the lower end of the second groove 425 on the right side, and the coolant flows into the refrigeration circuit again; a first groove 424 is arranged above the second groove 425, and the first groove 424 is the first passage 403, that is, the left end of the first groove 424 is connected with the inlet of the heating flow path 31, and the right end of the first groove 424 is connected with the outlet of the heating flow path 31.

[0072] Specifically, by setting the groove on the valve core 421, the flow direction and flow path of the high-temperature coolant and the low-temperature coolant can be accurately controlled to ensure that the coolant flows through the first end component 401 for heat exchange when needed, or flows directly around the end component. The corresponding relationship between the groove and the conducting valve port 423 is changed by rotating the valve core 421, which simplifies the mechanical operation, reduces the number of valves required, and reduces the complexity and cost of the system. In addition, by setting the groove structure, the rotation of the valve core 421 can quickly change the flow path, thereby improving the response speed of the thermal management system to temperature changes, so that the system can quickly adapt to temperature changes.

[0073] In addition, the arrangement of the first groove 424 and the second groove 425 of the present embodiment is based on the fact that the first end component 401 of the present embodiment must at least meet the three requirements of normal temperature, heating and cooling. The horizontal arrangement of the first groove 424 and the vertical arrangement of the second groove 425 enable the valve core 421 to accurately control the flow direction of the fluid by rotation. At different rotation positions, the corresponding relationship between the first groove 424 and the second groove 425 and the conduction valve port 423 changes, thereby controlling different flow paths to be connected or disconnected.

[0074] As a specific implementation method, the present embodiment divides the valve core 421 from 360° into three parts, each part is 120°, that is, the valve core 421 rotates once every 120°, and the valve core 421 is cylindrical in shape, and the arrangement of the grooves is conducive to the conduction between the valve core 421 and the inlet and outlet of the valve body. There are three working states of the terminal component, so the valve core 421 can be divided into three parts, and each part has three grooves, which serve as channels for the hot circuit, the cold circuit, and the inlet and outlet of the terminal component, and can prevent them from communicating with each other. Through such division, the hot circuit, the cold circuit, and the inlet and outlet of the terminal component can be placed on one side, which is convenient for the connection of the system flow path, and at the same time, the distance from the inlet to the outlet can be minimized, reducing the distance of an internal flow path.

[0075] As a specific implementation, the first switching valve 402 in this embodiment is essentially a six-way valve, and a sealing member 6 is arranged between the valve core 421 and the valve seat 422. The sealing member 6 is in a circular ring shape as a whole, and an avoidance hole is arranged on the sealing member 6 for connecting the valve port 423 with the channel. The sealing member 6 isolates the six channels in the valve core 421 and the valve seat 422 from each other to prevent the coolants in each channel from mixing with each other.

[0076] See also Figures 1 to 3 As shown, the terminal heat exchange component includes three first terminal heat exchange components 4 arranged in series in sequence, the first terminal component 401 of the first first terminal heat exchange component 4 is a motor electronic control, the first terminal component 401 of the second first terminal heat exchange component 4 is a third heat exchanger arranged outside the vehicle, and the first terminal component 401 of the third first terminal heat exchange component 4 is a battery.

[0077] In this embodiment, according to the terminal component setting of the automobile, a motor electronic control, a third heat exchanger and a battery are provided. When the valve core 421 of the first first terminal heat exchange component 4 is located at the second rotation position, the first switching valve 402 is in the second state. At this time, the connecting circuit 405 is connected with the first passage 403, and the high-temperature coolant in the heating flow path 31 flows into the first heat exchange flow path 406. At this time, the coolant in the first heat exchange flow path 406 flows through the motor electronic control. Although the coolant in the heating flow path 31 flows through the motor electronic control, the temperature of the motor electronic control is still is higher than the high-temperature coolant, so in essence, the high-temperature coolant is used to cool the motor electronic control; similarly, the valve core 421 of the third first-terminal heat exchange component 4 is located at the second rotation position, the first switching valve 402 is in the second state, and the connecting circuit 405 is now connected to the first passage 403. When the first terminal component 401 is a battery, the same high-temperature coolant is used to cool the battery. Considering that the various terminal components are connected in series, the high-temperature coolant flows through the motor electronic control, then flows into the third heat exchanger for heat dissipation, and then flows into the battery to cool the battery. When the valve cores 421 of the first and third first-terminal heat exchange components 4 are both located at the third rotation position, the first switching valve 402 is in the third state, and the connecting circuits 405 are now connected to the first passage 403, the low-temperature coolant is used to cool the motor electronic control and the electronic control.

[0078] See also Fig.11 As shown, the terminal heat exchange component also includes at least two second terminal heat exchange components 5, the second terminal heat exchange component 5 includes a second terminal component 501, a second switching valve 502 and a third heat exchange circuit 503, the second switching valve 502 is a three-way valve, the first valve port of the second switching valve 502 is connected to the inlet of the heating flow path 31 or the inlet of the cooling flow path 32, the second valve port of the second switching valve 502 is connected to the inlet of the third heat exchange circuit 503, the third valve port of the second switching valve 502 is connected to the outlet of the heating flow path 31 or the outlet of the cooling flow path 32, the outlet of the third heat exchange circuit 503 is connected to the outlet of the heating flow path 31 or the outlet of the cooling flow path 32, and a one-way valve 504 is provided at the connection point.

[0079] In this embodiment, according to the heat exchange requirements of the second end component 501, the second end component 501 only has two requirements of cooling and normal temperature or heating and normal temperature, and there is no need to consider the requirements of cooling and heating. The second switching valve 502 is a three-way valve that can control the flow direction of the fluid between the heating flow path 31 and the cooling flow path 32. This setting enables the system to flexibly switch the fluid from the heating flow path 31 or the cooling flow path 32 to normal temperature as needed.

[0080] See also Figures 1 to 11As shown, the terminal heat exchange component includes two second terminal heat exchange components 5, the second terminal component 501 of the first second terminal heat exchange component 5 is a heating heat exchanger arranged in the vehicle, the first valve port of the first second switching valve 502 is connected to the inlet of the heating flow path 31, the second valve port of the first second switching valve 502 is connected to the inlet of the third heat exchange loop 503, the third valve port of the first second switching valve 502 is connected to the outlet of the heating flow path 31, the outlet of the third heat exchange loop 503 is connected to the outlet of the heating flow path 31, and the connection A one-way valve 504 is provided at the connection; the second end component 501 of the second second end heat exchange assembly 5 is a refrigeration heat exchanger arranged in the vehicle, the first valve port of the second second switching valve 502 is connected to the inlet of the refrigeration flow path 32, the second valve port of the second second switching valve 502 is connected to the inlet of the third heat exchange circuit 503, the third valve port of the second second switching valve 502 is connected to the outlet of the refrigeration flow path 32, the outlet of the third heat exchange circuit 503 is connected to the outlet of the refrigeration flow path 32, and a one-way valve 504 is provided at the connection.

[0081] In this embodiment, the heating heat exchanger in the vehicle has only two modes: heating demand for the passenger compartment or no heating, and the cooling heat exchanger in the vehicle has only two modes: cooling demand for the passenger compartment or no cooling, and the mode demand of the second end component 501 is reduced compared with the first end component 401. Through two independent second end heat exchange components 5, the heating heat exchanger and cooling heat exchanger in the vehicle can be controlled separately. This setting allows the system to independently adjust heating and cooling according to the actual temperature demand in the vehicle, improve the accuracy and comfort of temperature control, and control the flow direction of the fluid through the three-way valve, so as to more effectively utilize thermal energy and reduce energy waste. For example, when the heating or cooling demand is low, the flow rate of the fluid to the corresponding heat exchanger can be reduced, thereby saving energy. The setting of the one-way valve 504 ensures that the fluid can only flow in one direction, prevents the backflow of the coolant, and ensures the safety and stable operation of the system.

[0082] In addition, the second terminal component 501 has only two working states, cooling or heating and normal temperature state. The in-vehicle heating heat exchanger and the in-vehicle cooling heat exchanger have only two states. When the second switching valve 502 is set to the first switching valve 402, there will be a mode that is in an unused state. The second terminal component 501 has only two modes, which can meet the control of this type of terminal component. At the same time, in terms of cost, the second switching valve 502 will be cheaper than the first switching valve 402. In terms of size, the second switching valve 502 will be smaller than the first switching valve 402. For terminal components with only two modes, the use of the second switching valve 502 can reduce the volume, make it lightweight, and reduce costs. The function of the one-way valve 504 is to prevent the coolant in the coolant cooling flow path 32 or the coolant heating flow path 31 from flowing into the terminal component when the terminal component is in the normal temperature working mode, so that it has a certain cooling or heating effect.

[0083] As a specific embodiment, the terminal heat exchange component includes three first terminal heat exchange components 4 arranged in series in sequence, the first terminal component 401 of the first first terminal heat exchange component 4 is a motor electronic control, the first terminal component 401 of the second first terminal heat exchange component 4 is a third heat exchanger arranged outside the vehicle, and the first terminal component 401 of the third first terminal heat exchange component 4 is a battery; the terminal heat exchange component includes two second terminal heat exchange components 5, the second terminal component 501 of the first second terminal heat exchange component 5 is a heating heat exchanger arranged in the vehicle, the second terminal component 501 of the second second terminal heat exchange component 5 is a cooling heat exchanger arranged in the vehicle, and the second terminal component 501 of the first second terminal heat exchange component 5 and the second terminal component 501 of the second second terminal heat exchange component 5 are arranged in series between the third heat exchanger and the battery. When the passenger compartment needs to be heated, the high-temperature coolant needs to flow through the heating heat exchanger, and the heating flow path 31 flows through the first passage 403 of the first switching valve, the first passage 403 of the second switching valve, the third heat exchange circuit 503 of the first second end heat exchange component 5 and the first passage 403 of the third first switching valve 402 in sequence, and the cooling flow path 32 flows through the second heat exchange flow path 407 of the first switching valve, the second passage 404 of the second switching valve, the third valve port 423 of the second second end heat exchange component 5 and the second heat exchange flow path 407 of the third switching valve in sequence. When the passenger compartment needs to be cooled, the heating flow path 31 flows through the first heat exchange flow path 406 of the first first switching valve 402, the first heat exchange flow path 406 of the second first switching valve 402, the third valve port of the first second switching valve 502 and the first passage 403 of the third first switching valve 402 in sequence, and the cooling flow path 32 flows through the second passage 404 of the first first switching valve 402, the second passage 404 of the second switching valve, the third heat exchange circuit 503 of the second second terminal heat exchange component 5 and the second heat exchange flow path 407 of the third switching valve in sequence. When charging below normal temperature is required, the battery dissipates heat, and the heating flow path 31 flows through the first passage 403 of the first first switching valve 402, the first heat exchange flow path 406 of the second first switching valve 402, the third valve port of the first second switching valve 502 and the first heat exchange flow path 406 of the third first switching valve 402 in sequence, and the cooling flow path 32 flows through the second passage 404 of the first switching valve, the first passage 403 of the second switching valve, the third valve port 423 of the second second end heat exchange component 5 and the second passage 404 of the third switching valve in sequence.

[0084] See also Figures 1 to 11As shown, the refrigeration cycle system 1 also includes a compressor 103, a gas-liquid separator 104, and an expansion valve 105. The first heat exchanger 101 is a plate condenser, and the second heat exchanger 102 is a plate evaporator. The compressor 103, the first heat exchanger 101, the expansion valve 105, the second heat exchanger 102 and the gas-liquid separator 104 are arranged in series in sequence; the first heat exchanger 101 is provided with a first refrigerant channel and a first coolant channel, the heating flow path 31 is arranged in series with the first heat exchanger 101, the heating flow path 31 is connected to the coolant channel, and a first kettle 311 and a first water pump 312 are arranged on the heating flow path 31; the second heat exchanger 102 is provided with a second refrigerant channel and a second coolant channel, the cooling flow path 32 is arranged in series with the second heat exchanger 102, the cooling flow path 32 is connected to the second coolant channel, and a second kettle 321 and a second water pump 322 are arranged on the cooling flow path 32.

[0085] Specifically, the plate condenser and the plate evaporator are involved in both the refrigerant flow and the coolant flow, and both the refrigerant and the coolant pass through the inside. The refrigerant and the coolant exchange heat by circulating inside the plate condenser and the plate evaporator to achieve heat exchange between the refrigerant flow path and the coolant flow path, so as to indirectly utilize the refrigerant flow path to achieve cooling or heating effects on terminal components such as the passenger compartment and electrical devices (such as batteries, motors and electronic controls).

[0086] See also Figures 1 to 11 As shown, the compressor 103, the gas-liquid separator 104, the expansion valve 105, the first heat exchanger 101 and the second heat exchanger 102 are arranged outside the passenger compartment.

[0087] In this embodiment, considering that the refrigerant end is placed outside the passenger compartment, the plate evaporator plate and the plate condenser at the refrigerant end need to be separately connected to a coolant flow path for heat exchange. At the same time, the refrigeration circuit and the heating circuit are set to prevent the refrigerant from leaking into the passenger compartment; the working state of the terminal component will be set to (normal temperature, cooling, heating) state due to different needs, and the terminal control module can control a working state of the terminal component so that its heating flow path 31 or the refrigeration flow path 32 does not flow through the terminal component. The thermal management system can be divided into three independent heat exchange circuits during operation, one is the refrigerant circuit, the second is the coolant end refrigeration circuit, and the third is the coolant end heating circuit. The refrigerant circulation system 1 is placed outside the passenger compartment, which can reduce the risk of refrigerant leakage into the passenger compartment.

[0088] See also Figure 12 to Figure 14As shown, a control method is used to control the above-mentioned thermal management system. When the first switching valve 402 has a first state, a second state and a third state, the terminal heat exchange component includes three first terminal heat exchange components 4 arranged in series in sequence, the first terminal component 401 of the first first terminal heat exchange component 4 is a motor electronic control, the first terminal component 401 of the second first terminal heat exchange component 4 is a third heat exchanger arranged outside the vehicle, and the first terminal component 401 of the third first terminal heat exchange component 4 is a battery, the control method includes:

[0089] S1: When heating is required in the vehicle, the first switching valve 402 of the first first end heat exchange component 4 is in the third state, the first switching valve 402 of the second first end heat exchange component 4 is in the first state, the first switching valve 402 of the third first end heat exchange component 4 is in the third state, the first valve port of the first second switching valve 502 is connected to the inlet of the heating flow path 31, the second valve port of the first second switching valve 502 is connected to the inlet of the third heat exchange circuit 503, the third valve port of the first second switching valve 502 is disconnected from the outlet of the heating flow path 31, and the outlet of the third heat exchange circuit 503 is connected to the outlet of the heating flow path 31; the first valve port of the second second switching valve 502 is connected to the inlet of the cooling flow path 32, the second valve port of the second second switching valve 502 is disconnected from the inlet of the third heat exchange circuit 503, and the third valve port of the second second switching valve 502 is connected to the outlet of the cooling flow path 32;

[0090] Specifically, when the thermal management system needs to heat the passenger compartment, cool the motor (heat recovery), and cool the battery (heat recovery) in operation, for the refrigerant cycle, the refrigerant enters the plate condenser after being compressed by the compressor 103, and the high-temperature refrigerant enters the plate evaporator plate to evaporate and absorb heat after being throttled by the throttle valve, and finally flows back to the compressor 103 through the vapor-liquid separator to form a refrigerant cycle. For the coolant cycle, the high-temperature coolant needs to flow through the heating heat exchanger, and the heating flow path 31 flows through the first passage 403 of the first first switching valve 402, the first passage 403 of the second first switching valve 402, the third heat exchange circuit 503 of the first second terminal heat exchange component 5, and the first passage 403 of the third first switching valve 402 in sequence, and the cooling flow path 32 flows through the second heat exchange flow path 407 of the first first switching valve 402, the second passage 404 of the second first switching valve 402, the third valve port 423 of the second second terminal heat exchange component 5, and the second heat exchange flow path 407 of the third first switching valve 402 in sequence. Among them, the low-temperature coolant exchanged by the plate evaporator in the coolant cooling flow path 32 passes through the second kettle 321, the second water pump 322, the motor electronic control, and the battery in sequence, and finally flows back to the plate evaporator to form a cycle to achieve cooling of the motor electronic control and the battery. At this time, the coolant realizes heat recovery through heat exchange with the motor electronic control and the battery; the high-temperature coolant exchanged by the plate condenser in the coolant heating flow path 31 passes through the first kettle 311, the first water pump 312, and the in-vehicle heating heat exchanger in sequence, and finally flows back to the plate condenser to form a cycle to heat the passenger compartment. In this mode, the heat generated by the battery and the motor electronic control can be recovered and used for heating the passenger compartment. Through this heat recovery method, the heating amount can be increased.

[0091] S2: When cooling is required in the vehicle, the first switching valve 402 of the first first end heat exchange component 4 is in the second state, the first switching valve 402 of the second first end heat exchange component 4 is in the second state, the first switching valve 402 of the third first end heat exchange component 4 is in the third state, the first valve port of the first second switching valve 502 is connected to the inlet of the heating flow path 31, the second valve port of the first second switching valve 502 is disconnected from the inlet of the third heat exchange circuit 503, and the third valve port of the first second switching valve 502 is connected to the outlet of the heating flow path 31; the first valve port of the second second switching valve 502 is connected to the inlet of the cooling flow path 32, the second valve port of the second second switching valve 502 is connected to the inlet of the third heat exchange circuit 503, the third valve port of the second second switching valve 502 is disconnected from the outlet of the cooling flow path 32, and the outlet of the third heat exchange circuit 503 is connected to the outlet of the cooling flow path 32;

[0092] Specifically, to realize the passenger compartment cooling, battery cooling, and motor electronic control heat dissipation operation scheme, the high-temperature coolant exchanged by the plate condenser in the coolant heating flow path 31 passes through the first kettle 311, the first water pump 312, the motor electronic control, and the off-vehicle heat exchanger in sequence, and finally flows back to the plate condenser to form a cycle, and the heat is dissipated to the environment by the off-vehicle fan 7 in the third heat exchanger. In addition, when the motor electronic control has a heat dissipation demand, its heat dissipation can be realized synchronously. The low-temperature coolant exchanged by the plate evaporator in the cooling flow path 32 passes through the second kettle 321, the second water pump 322, the in-vehicle refrigeration heat exchanger, and the battery in sequence, and finally flows back to the plate evaporator to form a cycle to realize the cooling of the passenger compartment and the battery. In this mode, the passenger compartment can be cooled, the battery can be cooled, and the motor and electronic control can be cooled. Because the temperature of the motor and electronic control is higher than the temperature of the coolant after flowing through the plate condenser, the coolant flowing out here can be used to cool the motor and electronic control. Then, the high-temperature liquid after passing through the motor and electronic control dissipates the heat to the outside of the vehicle through the external fan 7. In this way, the motor and electronic control are placed in the heating circuit for heat dissipation, and there is no need to use the refrigeration flow path 32 for cooling. This can improve the cooling effect while achieving heat dissipation of the motor and electronic control.

[0093] S3: When charging below normal temperature, the first switching valve 402 of the first first-end heat exchange component 4 is in the first state, the first switching valve 402 of the second first-end heat exchange component 4 is in the second state, the first switching valve 402 of the third first-end heat exchange component 4 is in the second state, the first valve port of the first second switching valve 502 is connected to the inlet of the heating flow path 31, the second valve port of the first second switching valve 502 is disconnected from the inlet of the third heat exchange circuit 503, and the third valve port of the first second switching valve 502 is connected to the outlet of the heating flow path 31; the first valve port of the second second switching valve 502 is connected to the inlet of the cooling flow path 32, the second valve port of the second second switching valve 502 is disconnected from the inlet of the third heat exchange circuit 503, and the third valve port of the second second switching valve 502 is connected to the outlet of the cooling flow path 32.

[0094] Specifically, in the operation scheme for heat dissipation of the battery when charging below normal temperature, in this operation scheme, only the coolant heating flow path 31 is working, and the refrigerant flow path and the coolant cooling flow path 32 are not involved in the work. For the coolant circulation, the corresponding motor electronic control end is switched to mode, and the heating flow path 31 flows through the first passage 403 of the first switching valve, the first heat exchange flow path 406 of the second switching valve, the third valve port of the first second switching valve 502 and the first heat exchange flow path 406 of the third first switching valve 402 in sequence, and the cooling flow path 32 flows through the second passage 404 of the first switching valve, the first passage 403 of the second first switching valve 402, the third valve port 423 of the second second end heat exchange component 5 and the second passage 404 of the third first switching valve 402 in sequence. The coolant heating flow path 31 is composed of the normal temperature coolant coming out of the plate condenser, which passes through the first kettle 311, the first water pump 312, the off-board heat exchanger and the battery in sequence, and finally flows back to the plate condenser to form a cycle, and the heat is dissipated to the environment by the off-board fan 7 in the off-board heat exchanger to achieve heat dissipation of the battery. This embodiment achieves heat dissipation of the battery. This solution can achieve heat dissipation of the battery without starting the compressor 103, reducing the use of electricity. In this mode, only the coolant heating flow path 31 circulates, and the coolant cooling flow path 32 does not circulate; for this type of solution, the refrigerant flow path does not participate in the work, and the coolant cooling flow path 32 and the coolant heating flow path 31 do not need to exchange heat with the refrigerant flow path. As long as the terminal components required to work are connected to one of the coolant heating flow path 31 or the coolant cooling flow path 32, the other terminal components that do not need to work are placed outside the required working flow path, and then the working flow path is circulated, whether the coolant heating flow path 31 or the coolant cooling flow path 32 is used as the working flow path, its function can be achieved.

[0095] It is worth noting that the thermal management system of this embodiment can not only realize the above three operating schemes. In addition to these three schemes, different operating schemes can be formed according to needs by adding different mode combinations of the first terminal heat exchange component 4 and the second terminal heat exchange component 5, so as to meet the increasing demand for new energy vehicle functions. For example, a refrigerator is added to the car, and the refrigerator obviously also has the needs of cooling and heating, or a dehumidifier or a heat exchanger is added for dehumidification.

[0096] A vehicle includes a thermal management system, wherein the thermal management system is the thermal management system described above.

[0097] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0098] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A thermal management system, characterized in that: include: A refrigerant circulation system (1), a coolant circulation system and a terminal heat exchange component; The refrigerant circulation system (1) comprises a first heat exchanger (101) and a second heat exchanger (102); The coolant circulation system comprises a heating flow path (31) and a cooling flow path (32), wherein the heating flow path (31) flows through the first heat exchanger (101), and the cooling flow path (32) flows through the second heat exchanger (102); The terminal heat exchange assembly comprises at least two first terminal heat exchange assemblies (4), the first terminal heat exchange assembly (4) comprising a first terminal component (401) and a first switching valve (402), the first switching valve (402) being provided with a first passage (403), a second passage (404) and a connecting circuit (405), the first passage (403), the second passage (404) and the connecting circuit (405) being isolated from each other, the inlet and outlet of the first passage (403) being respectively connected to the inlet and outlet of the heating flow path (31), and the inlet and outlet of the second passage (404) being respectively connected to the inlet and outlet of the cooling flow path (32); or the communication circuit (405) is connected to the first passage (403) to form a first heat exchange flow path (406), the inlet and outlet of the first heat exchange flow path (406) are respectively connected to the inlet and outlet of the heating flow path (31), and the coolant in the first heat exchange flow path (406) flows through the first terminal component (401); Or the connecting circuit (405) is connected to the second passage (404) to form a second heat exchange flow path (407), the inlet and outlet of the second heat exchange flow path (407) are respectively connected to the inlet and outlet of the refrigeration flow path (32), and the coolant in the second heat exchange flow path (407) flows through the first terminal component (401).

2. The thermal management system according to claim 1, characterized in that: The first switching valve (402) has a first state, a second state and a third state, and is switchable between the first state, the second state and the third state. When the first switching valve (402) is in the first state, the cooling flow path (32), the heating flow path (31) and the connecting circuit (405) are isolated from each other, the inlet and outlet of the first passage (403) are respectively connected to the inlet and outlet of the heating flow path (31), and the inlet and outlet of the second passage (404) are respectively connected to the inlet and outlet of the cooling flow path (32); When the first switching valve (402) is in the second state, the communication circuit (405) is connected to the first passage (403) to form a first heat exchange flow path (406); the inlet and outlet of the first heat exchange flow path (406) are respectively connected to the inlet and outlet of the heating flow path (31), and the coolant in the first heat exchange flow path (406) flows through the first terminal component (401); the inlet and outlet of the second passage (404) are respectively connected to the inlet and outlet of the cooling flow path (32); When the first switching valve (402) is in the third state, the connecting circuit (405) is connected to the second passage (404) to form a second heat exchange flow path (407), the inlet and outlet of the second heat exchange flow path (407) are respectively connected to the inlet and outlet of the refrigeration flow path (32), and the coolant in the second heat exchange flow path (407) flows through the first terminal component (401); the inlet and outlet of the first passage (403) are respectively connected to the inlet and outlet of the heating flow path (31).

3. The thermal management system according to claim 2, characterized in that: The first switching valve (402) includes a valve core (421) and a valve seat (422), the valve core (421) is provided with the first passage (403), the second passage (404) and the connecting circuit (405), the valve seat (422) is provided with a plurality of conducting valve ports (423), the inlets and outlets of the first passage (403), the second passage (404) and the connecting circuit (405) are respectively arranged corresponding to the conducting valve ports (423), and the valve core (421) is rotatably arranged in the valve seat (422) so as to be switchable between the first state, the second state and the third state.

4. The thermal management system according to claim 3, characterized in that: A plurality of first grooves (424) and second grooves (425) are arranged on the outer peripheral wall of the valve core (421), wherein the first grooves (424) are arranged horizontally, and the second grooves (425) are arranged vertically, and the two ends of the first grooves (424) are arranged corresponding to the conduction valve ports (423), and the two ends of the second grooves (425) are arranged corresponding to the conduction valve ports (423). The valve core (421) has three rotation positions. When the valve core (421) is at the first rotation position, the first switching valve (402) is in the first state. Three mutually unconnected first grooves (424) are arranged side by side on the circumferential outer wall of the valve core (421). The three first grooves (424) are respectively the first passage (403), the communication circuit (405) and the second passage (404). When the valve core (421) is located at the second rotation position, the first switching valve (402) is in the second state, and two second grooves (425) arranged in parallel are arranged on the circumferential outer wall of the valve core (421), and one first groove (424) is arranged below the second groove (425) in the vertical direction of the second groove (425), and the two second grooves (425) are connected to the pipeline to form the first heat exchange flow path (406), and the first groove (424) is the second passage (404); When the valve core (421) is located at the third rotation position, the first switching valve (402) is in the third state, and two second grooves (425) arranged in parallel are provided on the circumferential outer wall of the valve core (421), and in the vertical direction of the second groove (425), a first groove (424) is provided above the second groove (425), and the two second grooves (425) are connected to the pipeline to form the second heat exchange flow path (407), and the first groove (424) is the first passage (403).

5. The thermal management system according to claim 1, characterized in that: The terminal heat exchange component comprises three first terminal heat exchange components (4) arranged in series in sequence, wherein the first terminal component (401) of the first first terminal heat exchange component (4) is a motor electronic control, the first terminal component (401) of the second first terminal heat exchange component (4) is a third heat exchanger arranged outside the vehicle, and the first terminal component (401) of the third first terminal heat exchange component (4) is a battery.

6. The thermal management system according to claim 1, characterized in that: The terminal heat exchange component also includes at least two second terminal heat exchange components (5), the second terminal heat exchange component (5) includes a second terminal component (501), a second switching valve (502) and a third heat exchange circuit (503), the second switching valve (502) is a three-way valve, the first valve port of the second switching valve (502) is connected to the inlet of the heating flow path (31) or the inlet of the cooling flow path (32), the second valve port of the second switching valve (502) is connected to the inlet of the third heat exchange circuit (503), the third valve port of the second switching valve (502) is connected to the outlet of the heating flow path (31) or the outlet of the cooling flow path (32), the outlet of the third heat exchange circuit (503) is connected to the outlet of the heating flow path (31) or the outlet of the cooling flow path (32), and a one-way valve (504) is provided at the connection point.

7. The thermal management system according to claim 6, characterized in that: The terminal heat exchange component comprises two second terminal heat exchange components (5), the second terminal component (501) of the first second terminal heat exchange component (5) is a heating heat exchanger arranged in the vehicle, the first valve port of the first second switching valve (502) is connected to the inlet of the heating flow path (31), the second valve port of the first second switching valve (502) is connected to the inlet of the third heat exchange circuit (503), the third valve port of the first second switching valve (502) is connected to the outlet of the heating flow path (31), the outlet of the third heat exchange circuit (503) is connected to the outlet of the heating flow path (31), and a one-way valve (504) is provided at the connection point; The second end component (501) of the second second end heat exchange component (5) is a refrigeration heat exchanger arranged in the vehicle, the first valve port of the second second switching valve (502) is connected to the inlet of the refrigeration flow path (32), the second valve port of the second second switching valve (502) is connected to the inlet of the third heat exchange circuit (503), the third valve port of the second second switching valve (502) is connected to the outlet of the refrigeration flow path (32), the outlet of the third heat exchange circuit (503) is connected to the outlet of the refrigeration flow path (32), and a one-way valve (504) is provided at the connection point.

8. The thermal management system according to any one of claims 1 to 7, characterized in that: The refrigerant circulation system (1) further comprises a compressor (103), a gas-liquid separator (104), and an expansion valve (105); the first heat exchanger (101) is a plate-type condenser, the second heat exchanger (102) is a plate-type evaporator, and the compressor (103), the first heat exchanger (101), the expansion valve (105), the second heat exchanger (102), and the gas-liquid separator (104) are sequentially arranged in series; The first heat exchanger (101) is provided with a first refrigerant channel and a first cooling liquid channel, the heating flow path (31) is arranged in series with the first heat exchanger (101), the heating flow path (31) is communicated with the cooling liquid channel, and a first kettle (311) and a first water pump (312) are arranged on the heating flow path (31); The second heat exchanger (102) is provided with a second refrigerant channel and a second cooling liquid channel, the refrigeration flow path (32) is arranged in series with the second heat exchanger (102), the refrigeration flow path (32) is connected to the second cooling liquid channel, and a second kettle (321) and a second water pump (322) are arranged on the refrigeration flow path (32).

9. The thermal management system according to claim 8, characterized in that: The compressor (103), the gas-liquid separator (104), the expansion valve (105), the first heat exchanger (101), and the second heat exchanger (102) are arranged outside the passenger compartment.

10. A control method, characterized in that: The control method is used to control the thermal management system according to claim 7, when the first switching valve (402) has a first state, a second state and a third state, the terminal heat exchange component includes three first terminal heat exchange components (4) arranged in series, the first terminal component (401) of the first first terminal heat exchange component (4) is a motor electronic control, the first terminal component (401) of the second first terminal heat exchange component (4) is a third heat exchanger arranged outside the vehicle, and the first terminal component (401) of the third first terminal heat exchange component (4) is a battery, the control method includes: When heating is required in the vehicle, the first switching valve (402) of the first first end heat exchange component (4) is in the third state, the first switching valve (402) of the second first end heat exchange component (4) is in the first state, the first switching valve (402) of the third first end heat exchange component (4) is in the third state, the first valve port of the first second switching valve (502) is connected to the inlet of the heating flow path (31), and the second valve port of the first second switching valve (502) is connected to the inlet of the third heat exchange circuit (503). , the third valve port of the first second switching valve (502) is disconnected from the outlet of the heating flow path (31), and the outlet of the third heat exchange circuit (503) is connected to the outlet of the heating flow path (31); the first valve port of the second second switching valve (502) is connected to the inlet of the cooling flow path (32), the second valve port of the second second switching valve (502) is disconnected from the inlet of the third heat exchange circuit (503), and the third valve port of the second second switching valve (502) is connected to the outlet of the cooling flow path (32); When cooling is required in the vehicle, the first switching valve (402) of the first first end heat exchange component (4) is in the second state, the first switching valve (402) of the second first end heat exchange component (4) is in the second state, the first switching valve (402) of the third first end heat exchange component (4) is in the third state, the first valve port of the first second switching valve (502) is connected to the inlet of the heating flow path (31), and the second valve port of the first second switching valve (502) is disconnected from the inlet of the third heat exchange circuit (503). , the third valve port of the first second switching valve (502) is connected to the outlet of the heating flow path (31); the first valve port of the second second switching valve (502) is connected to the inlet of the cooling flow path (32), the second valve port of the second second switching valve (502) is connected to the inlet of the third heat exchange circuit (503), the third valve port of the second second switching valve (502) is disconnected from the outlet of the cooling flow path (32), and the outlet of the third heat exchange circuit (503) is connected to the outlet of the cooling flow path (32); When charging below normal temperature, the first switching valve (402) of the first first end heat exchange component (4) is in the first state, the first switching valve (402) of the second first end heat exchange component (4) is in the second state, the first switching valve (402) of the third first end heat exchange component (4) is in the second state, the first valve port of the first second switching valve (502) is connected to the inlet of the heating flow path (31), the second valve port of the first second switching valve (502) is disconnected from the inlet of the third heat exchange circuit (503), and the third valve port of the first second switching valve (502) is connected to the outlet of the heating flow path (31); the first valve port of the second second switching valve (502) is connected to the inlet of the cooling flow path (32), the second valve port of the second second switching valve (502) is disconnected from the inlet of the third heat exchange circuit (503), and the third valve port of the second second switching valve (502) is connected to the outlet of the cooling flow path (32).

11. A vehicle comprising a thermal management system, characterized in that: The thermal management system is the thermal management system according to any one of claims 1 to 9.

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