Multi-pass device and thermal management system

Abstract

According to the multi-way device, a valve element is located in an inner cavity of a valve body, the valve element is in sealed connection with the inner wall of the valve body, connector parts are connected with the outer wall of the valve body, and inner cavities of any two connector parts are isolated from each other on the outer wall of the valve body; the multi-way device is provided with a first cavity, a second cavity and a third cavity which are mutually isolated in the valve body, the first cavity, the second cavity and the third cavity move along with rotation of the valve element, an inner cavity of the connector part is communicated with one of the first cavity, the second cavity and the third cavity, and an outer cavity of the connector part is communicated with one of the first cavity, the second cavity and the third cavity. And at least one of the first cavity and the second cavity can be communicated with the inner cavities of the two interface parts. The multi-pass device provided by the invention can realize more functions and is rich in application scene. The invention further discloses a thermal management system, the number of valves of the thermal management system can be reduced by applying the multi-pass device, and the thermal management system is simple in structure.

Description

Technical Field

[0001] The present application relates to the technical field of flow path management, and in particular to a multi-channel device and a thermal management system. Background Art

[0002] Multi-pass devices are widely used in thermal management systems (such as air conditioning systems). Multi-pass devices can be used to switch the connectivity of various branches in the thermal management system, thereby switching the operating conditions.

[0003] In the related art, the multi-way device has a first interface, a second interface, a third interface and a fourth interface. When the multi-way device is in a first state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; when the multi-way device is in a second state, the first interface is connected to the fourth interface, and the second interface is connected to the third interface. The multi-way device can only switch between two states, the functions that can be realized are relatively simple, and the application scenarios are limited. When the thermal management system uses the multi-way device to achieve working condition switching, it needs to cooperate with more valves and the structure is complex. Summary of the invention

[0004] The purpose of the present application is to provide a multi-pass device with rich application scenarios and a thermal management system with a simple structure.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a multi-way device comprises: a valve body, a valve core and a plurality of interface parts, the valve core is located in the inner cavity of the valve body, the valve core is sealed and connected to the inner wall of the valve body, the interface part is connected to the outer wall of the valve body, and the inner cavities of any two of the interface parts are isolated from each other on the outer wall of the valve body; the multi-way device has a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are isolated from each other within the valve body, the first cavity, the second cavity and the third cavity move with the rotation of the valve core, the inner cavity of the interface part is connected to one of the first cavity, the second cavity and the third cavity, and at least one of the first cavity and the second cavity can be connected to the inner cavities of two of the interface parts.

[0007] The multi-way device of the present application has a first chamber, a second chamber and a third chamber that are isolated from each other in the valve body. The first chamber, the second chamber and the third chamber move with the rotation of the valve core. The inner chamber of the interface part is connected to one of the first chamber, the second chamber and the third chamber, so that the multi-way device can realize more functions and has rich application scenarios.

[0008] On the other hand, a thermal management system includes a multi-way device and multiple branches, the multi-way device has multiple interfaces, the branches correspond to the interfaces one by one, one end of the branch is connected to the corresponding interface, and the other ends of the multiple branches are connected to each other; the multi-way device has a first cavity and a second cavity, the first cavity and the second cavity are isolated from each other in the valve body, the first cavity and the second cavity move with the rotation of the valve core of the multi-way device, at least one of the first cavity and the second cavity can be connected to two of the interfaces, and the multi-way device can cut off one of the interfaces from the corresponding branch or cut off two of the interfaces from the corresponding branches respectively.

[0009] In the thermal management system of the present application, branches correspond to interfaces one by one, one end of a branch is connected to the corresponding interface, and the other ends of multiple branches are connected to each other. The multi-way device has a first chamber and a second chamber isolated from each other in the valve body, and the first chamber and the second chamber move as the valve core of the multi-way device rotates. The multi-way device can cut off one of the interfaces from the corresponding branch or cut off two of the interfaces from the corresponding branches respectively, so that the multi-way device can realize more functions, reduce the number of valve components of the thermal management system, and simplify the structure of the thermal management system.

[0010] On the other hand, a multi-way device comprises: a valve body, a valve core and a plurality of interface parts, the valve core is located in the inner cavity of the valve body, the valve core is sealed and connected to the inner wall of the valve body, the interface part is connected to the outer wall of the valve body, and the inner cavities of any two of the interface parts are isolated from each other on the outer wall of the valve body; the multi-way device has a first cavity and a second cavity, the first cavity and the second cavity are isolated from each other within the valve body, the first cavity and the second cavity move with the rotation of the valve core, the first cavity is communicated with the inner cavities of at least two of the interface parts, the second cavity is communicated with the inner cavities of one or two of the interface parts, and the valve core can cut off one of the interface parts or two of the interface parts.

[0011] The multi-way device of the present application has a first chamber and a second chamber isolated from each other in the valve body. The first chamber and the second chamber move with the rotation of the valve core. The valve core can cut off one of the interface parts or two of the interface parts, so that the multi-way device can realize more functions and rich application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a connection diagram of an embodiment of a thermal management system of the present application;

[0013] Figure 2 is a schematic diagram of a first mode of an embodiment of a thermal management system of the present application;

[0014] Figure 3is a schematic diagram of a second mode of an embodiment of a thermal management system of the present application;

[0015] Figure 4 is a schematic diagram of a third mode of an embodiment of a thermal management system of the present application;

[0016] Figure 5 It is a simplified schematic diagram of an embodiment of a multi-pass device of the present application. DETAILED DESCRIPTION

[0017] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0018] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0019] It should be understood that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the presence of at least one; "plurality" indicates a quantity of two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects.

[0020] The multi-pass device of the exemplary embodiment of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or combine with each other.

[0021] According to a specific embodiment of the multi-pass device 1 of the present application, Figure 5As shown, the multi-way device 1 includes a valve body 16, a valve core 15 and a plurality of interface parts S, the valve core 15 is located in the inner cavity of the valve body 16, the valve core 15 is sealed and connected to the inner wall of the valve body 16, the interface part S is connected to the outer wall of the valve body 16, and the inner cavities of any two interface parts S are isolated from each other on the surface of the valve body 16. The multi-way device 1 has a first cavity 10, a second cavity 20 and a third cavity 30, the first cavity 10, the second cavity 20 and the third cavity 30 are isolated from each other in the valve body 16, and the first cavity 10, the second cavity 20 and the third cavity 30 move with the rotation of the valve core 15. The inner cavity of the interface part S is communicated with one of the first cavity 10, the second cavity 20 and the third cavity 30, and at least one of the first cavity 10 and the second cavity 20 can be communicated with the inner cavities of the two interface parts S.

[0022] In this embodiment, the multi-way device 1 has a first chamber 10, a second chamber 20 and a third chamber 30 that are isolated from each other in the valve body 16. The first chamber 10, the second chamber 20 and the third chamber 30 move with the rotation of the valve core 15. By setting three isolated chambers and rotating the valve core 15, the connectivity states of the multiple interface parts S of the multi-way device 1 are more diverse, and the multi-way device 1 can realize more functions and has rich application scenarios.

[0023] The valve body 16 has a relatively sealed inner cavity, and the inner cavity of the valve body 16 is separated into a first cavity 10, a second cavity 20 and a third cavity 30 by the valve core 15. Two adjacent cavities are isolated from each other in the valve body 16. The valve core 15 rotates to drive the three cavities to move simultaneously in a circular trajectory, switching the connection state of the inner cavities of multiple interface parts S to form multiple application states.

[0024] In some possible embodiments, the valve body 16 is substantially cylindrical, the valve core 15 is substantially cylindrical, the cross section of the inner wall of the valve body 16 is circular, the cross section of the valve core 15 is Y-shaped, the center axis of the valve core 15 coincides with the center axis of the valve body 16, and the valve core 15 rotates with its own center axis. On a plane perpendicular to the rotation axis of the valve core 15, the projection of the inner wall of the valve body 16 is circular, the projection of the valve core 15 is Y-shaped, and the intersection of the Y-shape coincides with the center of the circle.

[0025] Reference Figure 5The valve core 15 includes a first baffle 151 and a second baffle 152, and the intersection of the first baffle 151 and the second baffle 152 is the rotation axis of the valve core 15. That is, the common part of the first baffle 151 and the second baffle 152 is the rotation axis, or the first baffle 151 and the second baffle 152 are both fixed to the rotation axis of the valve core 15. The two sides of the first baffle 151 are respectively sealed and connected to two places of the inner wall of the valve body 16, one side of the second baffle 152 is sealed and connected to another place of the inner wall of the valve body 16, and the other side of the second baffle 152 is sealed and connected to the middle of the first baffle 151. The first cavity 10 is located between one side of the first baffle 151 and the inner wall of the valve body 16, the second cavity 20 is located between the other side of the first baffle 151, one side of the second baffle 152 and the inner wall of the valve body 16, and the third cavity 30 is located between the other side of the first baffle 151, the other side of the second baffle 152 and the inner wall of the valve body 16. Optionally, the first baffle 151 and the second baffle 152 are an integrated structure.

[0026] The inner cavity of each interface portion S is connected to the inner cavity of the valve body 16, and the interface portion S is used to achieve connection with an external pipeline or component. The inner cavity of the interface portion S is connected to the inner cavity of the valve body 16 and the inner cavity of the external pipe or component, and the interface portion S is sealed and connected to the valve body 16 or is an integral structure. Optionally, the multi-way device 1 includes four interface portions S, namely the first interface portion S1, the second interface portion S2, the third interface portion S3 and the fourth interface portion S4, and the first interface portion S1, the second interface portion S2, the third interface portion S3 and the fourth interface portion S4 are distributed in an annular manner on the circumference of the valve body 16. On a plane perpendicular to the rotation axis of the valve core 15, the projection of the second interface portion S2 is located between the projection of the first interface portion S1 and the projection of the third interface portion S3, the projection of the third interface portion S3 is located between the projection of the second interface portion S2 and the projection of the fourth interface portion S4, and the projection of the fourth interface portion S4 is located between the projection of the first interface portion S1 and the projection of the third interface portion S3.

[0027] In this embodiment, the valve core 15 is in the first position, the inner cavity of the first interface part S1 and the inner cavity of the fourth interface part S4 are respectively connected to the first cavity 10, and the inner cavity of the second interface part S2 and the inner cavity of the third interface part S3 are respectively connected to the second cavity 20, forming two mutually isolated channels in the valve body 16. The valve core 15 is in the second position, the inner cavity of the first interface part S1 is connected to the second cavity 20, the inner cavity of the second interface part S2, the inner cavity of the third interface part S3, and the inner cavity of the fourth interface part S4 are respectively connected to the first cavity 10, and the multi-way device 1 can realize the function of the three-way component and can realize diversion. The valve core 15 is in the third position, the inner cavity of the first interface part S1 is connected to the third cavity 30, the inner cavity of the second interface part S2 is connected to the second cavity 20, and the inner cavity of the third interface part S3 and the inner cavity of the fourth interface part S4 are respectively connected to the first cavity 10, and the multi-way device 1 is used to simultaneously realize the functions of isolating the first interface part S1 and the second interface part S2 and connecting the third interface part S3 and the fourth interface part S4. When the multi-way device 1 of the present application is applied to a thermal management system, the number of valve components can be reduced and the structure of the thermal management system can be simplified.

[0028] In order to realize the above three functions, on the plane perpendicular to the rotation axis of the valve core 15, the maximum angle formed by the projection of the second interface portion S2, the projection of the fourth interface portion S4 and the center of the projection of the valve core 15 is less than 180°, the minimum angle formed by the projection of the first interface portion S1, the projection of the second interface portion S2 and the center of the projection of the valve core 15 is greater than 90°, the minimum angle formed by the projection of the first interface portion S1, the projection of the fourth interface portion S4 and the center of the projection of the valve core 15 is greater than 90°, and the angle between the side of the first baffle portion 151 facing the second baffle portion 152 and the side of the second baffle portion 152 facing the first baffle portion 151 is a, 0°<a≤90°. The first baffle portion 151 and the second baffle portion 152 are used to form the first cavity 10, the second cavity 20 and the third cavity 30 of different sizes of fan-shaped areas, and the spacing between the four interface portions S is reasonably designed, and the above functions are realized through a relatively simple structural design, which is conducive to the miniaturization of the multi-channel device 1. Optionally, the extension length of the first blocking portion 151 is equal to the diameter of the cross section of the valve body 16 , and the extension length of the second blocking portion 152 is equal to the radius of the cross section of the valve body 16 .

[0029] In some other embodiments, the area occupied by the third chamber 30 is a solid structure or a structure with solid side walls. When the valve core 15 is in the third position, the valve core 15 blocks the inner cavity of the first interface part S1, so that the first interface part S1 is cut off, and the components on the branch corresponding to the first interface part S1 are not connected to the system circuit.

[0030] The present application also provides a thermal management system, which is not only applicable to vehicles, but also to other heat exchange systems that require thermal management. For ease of description, the present application is described by taking the application to vehicles as an example. Depending on the design of the thermal management system, the multi-pass device 1 can be any of the embodiments described above.

[0031] According to a specific embodiment of the thermal management system of the present application, Figure 1 As shown, the thermal management system includes a multi-way device 1 and multiple branches. The multi-way device 1 has multiple interfaces. The branches correspond to the interfaces one by one. One end of the branch is connected to the corresponding interface, and the other ends of the multiple branches are connected to each other. The multi-way device 1 has a first chamber 10, a second chamber 20, and a third chamber 30. The first chamber 10, the second chamber 20, and the third chamber 30 are isolated from each other in the valve body 16. The first chamber 10, the second chamber 20, and the third chamber 30 move as the valve core 15 of the multi-way device 1 rotates. The interface is connected to one of the first chamber 10, the second chamber 20, and the third chamber 30. At least one of the first chamber 10 and the second chamber 20 can be connected to two interfaces.

[0032] In the thermal management system of the present application, branches correspond to interfaces one by one, one end of a branch is connected to the corresponding interface, and the other ends of multiple branches are connected to each other. The multi-way device 1 has a first chamber 10, a second chamber 20 and a third chamber 30 that are isolated from each other in a valve body 16. The first chamber 10, the second chamber 20 and the third chamber 30 move as the valve core 15 of the multi-way device 1 rotates, so that the multi-way device 1 can realize more functions, reduce the number of valve components of the thermal management system, and simplify the structure of the thermal management system.

[0033] The various components of the thermal management system are connected through pipes to form two major systems, namely the refrigerant system and the coolant system. The refrigerant system circulates refrigerant, and the coolant system circulates coolant. The refrigerant can be R134A or carbon dioxide or other heat exchange media, and the coolant can be a mixed solution of ethanol and water or other cooling media.

[0034] The vehicle has an air conditioning box for exchanging heat with the air in the passenger compartment. In this embodiment, some heat exchange components of the refrigerant system are arranged in the air conditioning box for exchanging heat with the air in the air conditioning box, thereby adjusting the temperature and humidity of the passenger compartment. The specific connection method of the components of the refrigerant system is not shown in this application, and can be designed according to requirements, as long as the temperature and humidity requirements of the passenger compartment and the temperature requirements of the battery can be met.

[0035] The thermal management system includes a heat exchanger 6, which includes a first heat exchange part 61 and a second heat exchange part 62 that are isolated from each other. The heat exchanger 6 is used for heat exchange between the refrigerant and the coolant. The heat exchanger 6 is a liquid-cooled heat exchanger, which can be a shell and tube type, a plate type, or a sleeve type. The structure and working principle of the liquid-cooled heat exchanger are well known to those skilled in the art, and will not be described in detail in this application. Among them, the flow channel of the second heat exchange part 62 is connected to the refrigerant system, and the flow channel of the first heat exchange part 61 is connected to the coolant system.

[0036] It should be explained that "the flow channel of the second heat exchange part 62 is connected to the refrigerant system" means that the refrigerant system includes the second heat exchange part 62, the refrigerant in the refrigerant system can flow into and out of the flow channel of the second heat exchange part 62, and the inlet and outlet of the second heat exchange part 62 can be connected to other components in the refrigerant system through pipelines, and a loop is formed after being connected through the pipelines when the thermal management system is working. The flow channel of the first heat exchange part 61 is connected to the coolant system, refer to the above explanation.

[0037] Reference Figure 1 The coolant system includes a first pump 2, a battery heat exchange device 3, a second pump 4, a motor heat exchange device 5, a radiator 7, a first heat exchange part 61 and a multi-channel device 1. The above components can be indirectly connected through pipes or valves, or at least two components can be integrated into an integrated structure.

[0038] The first pump 2 and the second pump 4 are used to provide power for the flow of coolant in the coolant system. Optionally, the first pump 2 and the second pump 4 are electronic water pumps, and the types and specifications of the two pumps can be the same or different, and are selected according to the requirements of the thermal management system.

[0039] The battery heat exchange device 3 is used to perform thermal management on the battery. Optionally, the battery heat exchange device 3 can be an integrated component with the battery as an integral structure, or can be an independent component and then assembled with the battery.

[0040] The motor heat exchange device 5 is used for heat management of the motor. Optionally, the motor heat exchange device 5 can be an integrated component with the motor as an integral structure, or can be an independent component and then assembled with the motor.

[0041] The radiator 7 is an air-cooled heat exchanger for exchanging heat with the atmospheric environment and is used as a low-temperature water tank. The structure of the air-cooled heat exchanger is well known to those skilled in the art and will not be described in detail in this application.

[0042] The heat exchanger 6 is used to heat the coolant or reduce the temperature of the coolant, and perform thermal management on the coolant temperature.

[0043] Reference Figure 1The coolant system includes a first branch A, a second branch B, a third branch C, a fourth branch D and a multi-channel device 1. The first branch A includes a first pump 2 and a battery heat exchange device 3. The second branch B includes a second pump 4 and a motor heat exchange device 5. The third branch C includes a radiator 7. The fourth branch D includes a first heat exchange part 61.

[0044] Reference Figure 1 and Figure 5 The multi-channel device 1 includes a first interface portion S1, a second interface portion S2, a third interface portion S3 and a fourth interface portion S4, the first interface portion S1 has a first interface 11, the second interface portion S2 has a second interface 12, the third interface portion S3 has a third interface 13, the fourth interface portion S4 has a fourth interface 14, and the multi-channel device 1 has a first cavity 10, a second cavity 20 and a third cavity 30. One end of the first branch A is connected to the first interface 11, one end of the second branch B is connected to the second interface 12, one end of the third branch C is connected to the third interface 13, one end of the fourth branch D is connected to the fourth interface 14, and the other end of the first branch A, the other end of the second branch B, the other end of the third branch C, and the other end of the fourth branch D are connected to each other.

[0045] The multi-way device 1 is in the first state, the valve core 15 of the corresponding multi-way device 1 is in the first position, the first interface 11 is connected with the fourth interface 14 through the first cavity 10, the third interface 13 is connected with the second interface 12 through the second cavity 20, the first branch A is connected with the fourth branch D, and the second branch B is connected with the third branch C.

[0046] The multi-way device 1 is in the second state, and the valve core 15 of the corresponding multi-way device 1 is in the second position, the first interface 11 is connected with the second chamber 20, the third interface 13 is connected with the second interface 12 through the first chamber 10, the third interface 13 is connected with the fourth interface 14 through the first chamber 10, the second branch B is connected with the first branch A, and the second branch B is connected with the third branch C.

[0047] The multi-way device 1 is in the third state, and the valve core 15 of the corresponding multi-way device 1 is in the third position, the first interface 11 is connected to the third chamber 30, the second interface 12 is connected to the second chamber 20, the third interface 13 is connected to the fourth interface 14 through the first chamber 10, and the second branch B is connected to the first branch A. If the area corresponding to the third chamber 30 is solid, the valve core 15 blocks the first interface 11, so that the fourth branch D is not connected to the circuit.

[0048] In this embodiment, the first interface 11 is connected to one end of the first heat exchange part 61, the second interface 12 is connected to one end of the radiator 7, the third interface 13 is connected to one end of the motor heat exchange device 5, the other end of the motor heat exchange device 5 is connected to the outlet of the second pump 4, the third interface 13 is connected to the inlet of the first pump 2, the outlet of the first pump 2 is connected to one end of the battery heat exchange device 3, the other end of the first heat exchange part 61, the other end of the battery heat exchange device 3, the inlet of the second pump 4, and the other end of the radiator 7 are connected. By adjusting the connectivity of the multi-channel device 1, the state of the first pump 2, and the state of the second pump 4, the connectivity between the branches and the flow rate of the coolant in each branch are adjusted.

[0049] The thermal management system has a first mode, which is suitable for the state where the motor and the battery are thermally managed separately. Figure 2 , the refrigerant system is in operation, the first pump 2 and the second pump 4 are turned on, and the multi-pass device 1 is in the first state. The outlet of the first pump 2, the battery heat exchange device 3, the first heat exchange part 61, and the inlet of the first pump 2 are connected in sequence, and the outlet of the second pump 4, the motor heat exchange device 5, the radiator 7, and the inlet of the second pump 4 are connected in sequence, and the circuit where the first pump 2 is located is isolated from the circuit where the second pump 4 is located. The motor uses the radiator 7 to dissipate heat, and the battery uses the heat exchanger 6 to achieve cooling or heating.

[0050] The thermal management system has a second mode, which is suitable for the state where the motor and the battery share the heat sink 7 for thermal management. Figure 3 , the second pump 4 is turned on, the multi-pass device 1 is in the second state, and the refrigerant system is in the running state or the closed state according to the heat exchange demand of the passenger compartment. The outlet of the second pump 4, the motor heat exchange device 5, the first pump 2, the battery heat exchange device 3, and the inlet of the second pump 4 are connected in sequence, and the outlet of the second pump 4, the motor heat exchange device 5, the radiator 7, and the inlet of the second pump 4 are connected in sequence. The coolant circulates, and the motor and the battery both use the radiator 7 for heat dissipation, saving energy.

[0051] In this mode, if the first pump 2 is not working, the diversion state is achieved through the multi-channel device 1; assuming that the first pump 2 works at a power different from that of the second pump 4, the corresponding flow of the first pump 2 is superimposed on the main circuit where the motor heat exchange device 5 is located.

[0052] In the second mode, if the coolant temperature is too high, in order to prevent the coolant from heating the battery, the multi-pass device 1 can be switched to the first state first, the first pump 2 is turned off, and the outlet of the second pump 4, the motor heat exchange device 5, the radiator 7, and the inlet of the second pump 4 are connected in sequence, and heat is exchanged with the atmospheric environment through the radiator 7, so as to reduce the coolant temperature, and then the multi-pass device 1 is switched to the second state, and the radiator 7 is used to dissipate heat from the motor and the battery.

[0053] The thermal management system has a third mode, which is suitable for a state where the motor heats the battery. Figure 4 , the first pump 2 and / or the second pump 4 are turned on, the multi-pass device 1 is in the third state, and the refrigerant system is in the running state or the closed state according to the heat exchange demand of the passenger compartment. The outlet of the second pump 4, the motor heat exchange device 5, the first pump 2, the battery heat exchange device 3, and the inlet of the second pump 4 are connected in sequence, and the motor is used to heat the battery, which can be to use the residual heat of the motor to heat the battery, or to use the inefficient heat generation of the motor to heat the battery.

[0054] In this mode, the third branch C and the fourth branch D are disconnected from the coolant circuit through the multi-pass device 1, and the third branch C and the fourth branch D are disconnected. The third branch C is disconnected to prevent heat from being lost to the atmosphere through the radiator 7. The fourth branch D is disconnected to prevent heat in the refrigerant system from being wasted in the coolant system when refrigerant flows in the second heat exchange part 62, thereby affecting the heat exchange effect of the passenger compartment, which is more energy-efficient.

[0055] In the present application, compared with the related art, the three-way valve for controlling whether the third branch C is connected to the coolant circuit can be omitted, thereby simplifying the thermal management system and facilitating the miniaturization of the thermal management system.

[0056] In the present application, the "connection" between two components can be a direct connection or a connection through a pipeline. There can be only a pipeline between the two components, or there can be a valve device or other components between the two components in addition to the pipeline. Similarly, the "communication" between two components in the present application can be a direct communication or a connection through a pipeline. There can be only a pipeline between the two components, or there can be a valve device or other components between the two components.

[0057] It should be understood that the various modes of the thermal management system of the present application are independent of each other and can be directly run when powered on. There is no order of sequence for the operation of the various modes. The description of the progressive relationship in the above description is only for ease of understanding and should not be understood as a sequence of operation of the two modes.

[0058] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments with equivalent changes without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A multi-pass device, characterized in that: include: A valve body, a valve core and a plurality of interface parts, wherein the valve core is located in the inner cavity of the valve body, the valve core is sealed and connected to the inner wall of the valve body, the interface parts are connected to the outer wall of the valve body, and the inner cavities of any two of the interface parts are isolated from each other on the outer wall of the valve body; The multi-way device comprises a first chamber, a second chamber and a third chamber, the first chamber, the second chamber and the third chamber are isolated from each other in the valve body, the first chamber, the second chamber and the third chamber move with the rotation of the valve core, the inner chamber of the interface part is connected with one of the first chamber, the second chamber and the third chamber, and at least one of the first chamber and the second chamber can be connected with the inner chambers of two of the interface parts.

2. The multi-channel device according to claim 1, characterized in that The multiple interface parts include a first interface part, a second interface part, a third interface part and a fourth interface part, the first interface part, the second interface part, the third interface part and the fourth interface part are distributed in a ring shape around the valve body, the central axis of the valve core coincides with the central axis of the valve body, and the valve core uses its own central axis as a rotation axis; The valve core is in the first position, the inner cavity of the first interface part and the inner cavity of the fourth interface part are respectively connected to the first cavity, and the inner cavity of the second interface part and the inner cavity of the third interface part are respectively connected to the second cavity; The valve core is in the second position, the inner cavity of the first interface part is connected to the second cavity, and the inner cavities of the second interface part, the third interface part, and the fourth interface part are respectively connected to the first cavity; The valve core is in the third position, the inner cavity of the first interface part is connected with the third cavity, the inner cavity of the second interface part is connected with the second cavity, and the inner cavity of the third interface part and the inner cavity of the fourth interface part are respectively connected with the first cavity.

3. The multi-channel device according to claim 2, characterized in that On a plane perpendicular to the rotation axis of the valve core, the projection of the second interface part is located between the projection of the first interface part and the projection of the third interface part, the projection of the third interface part is located between the projection of the second interface part and the projection of the fourth interface part, the projection of the fourth interface part is located between the projection of the first interface part and the projection of the third interface part, the maximum angle formed by the centers of the projection of the second interface part, the projection of the fourth interface part and the projection of the valve core is less than 180°, the minimum angle formed by the centers of the projection of the first interface part, the projection of the second interface part and the projection of the valve core is greater than 90°, and the minimum angle formed by the centers of the projection of the first interface part, the projection of the fourth interface part and the projection of the valve core is greater than 90°.

4. The multi-channel device according to claim 1, characterized in that On a plane perpendicular to the rotation axis of the valve core, the contour of the projection of the inner wall of the valve body is a circle, the projection of the valve core is a Y shape, and the intersection of the Y shape coincides with the center of the circle.

5. The multi-pass device according to claim 4, characterized in that The valve core comprises a first baffle portion and a second baffle portion, the intersection of the first baffle portion and the second baffle portion is the rotation axis of the valve core, two sides of the first baffle portion are respectively sealed and connected to two locations of the inner wall of the valve body, one side of the second baffle portion is sealed and connected to another location of the inner wall of the valve body, and the other side of the second baffle portion is sealed and connected to the middle of the first baffle portion; The first cavity is located between one side of the first baffle and the inner wall of the valve body, the second cavity is located between the other side of the first baffle, one side of the second baffle and the inner wall of the valve body, and the third cavity is located between the other side of the first baffle, the other side of the second baffle and the inner wall of the valve body.

6. The multi-channel device according to claim 5, characterized in that An included angle between a side surface of the first barrier portion facing the second barrier portion and a side surface of the second barrier portion facing the first barrier portion is a, and 0°<a≤90°.

7. A thermal management system, characterized in that: It comprises a multi-channel device and a plurality of branches, wherein the multi-channel device has a plurality of interfaces, the branches correspond to the interfaces one by one, one end of the branch is connected to the corresponding interface, and the other ends of the plurality of branches are connected to each other; The multi-way device comprises a first chamber and a second chamber, the first chamber and the second chamber are isolated from each other in the valve body, the first chamber and the second chamber move as the valve core of the multi-way device rotates, at least one of the first chamber and the second chamber can be connected to the two interfaces, and the multi-way device can cut off one of the interfaces from the corresponding branch or cut off two of the interfaces from the corresponding branches respectively.

8. The thermal management system according to claim 7, characterized in that: The multiple branches include a first branch, a second branch, a third branch and a fourth branch, the multiple interfaces include a first interface, a second interface, a third interface and a fourth interface, one end of the first branch can be connected to the first interface, one end of the second branch can be connected to the second interface, one end of the third branch can be connected to the third interface, one end of the fourth branch can be connected to the fourth interface, the other end of the first branch can be connected to the other end of the second branch or the other end of the fourth branch, and the other end of the second branch can be connected to the other end of the first branch and / or the other end of the third branch.

9. The thermal management system according to claim 8, characterized in that: The multi-channel device is in a first state, the first interface is connected to the fourth interface through the first cavity, the third interface is connected to the second interface through the second cavity, the first branch is connected to the fourth branch, and the second branch is connected to the third branch; The multi-channel device is in a second state, the first interface is in communication with the second cavity, the third interface is in communication with the second interface through the first cavity, the third interface is in communication with the fourth interface through the first cavity, the second branch is in communication with the first branch, and the second branch is in communication with the third branch; The multi-channel device is in a third state, the second interface is communicated with the second cavity, the third interface is communicated with the fourth interface through the first cavity, and the second branch is communicated with the first branch.

10. The thermal management system according to claim 8, characterized in that: The first branch includes a first pump and a battery heat exchange device, the battery heat exchange device is configured to perform thermal management on the battery, and the first pump is configured to drive the flow of coolant; the second branch includes a second pump and a motor heat exchange device, the motor heat exchange device is configured to perform thermal management on the motor, and the second pump is configured to drive the flow of coolant; the third branch includes a radiator, and the radiator is configured to exchange heat with the atmospheric environment; the fourth branch includes a heat exchanger, and the heat exchanger is configured to achieve heat exchange between refrigerant and coolant.

11. A multi-pass device, characterized in that: include: A valve body, a valve core and a plurality of interface parts, wherein the valve core is located in the inner cavity of the valve body, the valve core is sealed and connected to the inner wall of the valve body, the interface parts are connected to the outer wall of the valve body, and the inner cavities of any two of the interface parts are isolated from each other on the outer wall of the valve body; The multi-way device comprises a first chamber and a second chamber, the first chamber and the second chamber are isolated from each other in the valve body, the first chamber and the second chamber move with the rotation of the valve core, the first chamber is communicated with the inner chambers of at least two of the interface parts, the second chamber is communicated with the inner chambers of one or two of the interface parts, and the valve core can cut off one of the interface parts or two of the interface parts.

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