Plug, expansion kettle, thermal management system and vehicle

Abstract

The utility model relates to a plug, an expansion kettle, a heat management system and a vehicle. And the plug is used for sealing the pipeline. The plug comprises a main body part, a sealing part and a connecting part. The main body part comprises a sealing surface, an outer surface and a side surface, wherein the sealing surface and the outer surface are oppositely arranged, and the side surface is connected with the sealing surface and the outer surface. The sealing part is arranged on the sealing surface, extends away from the outer surface and is used for being arranged in a channel of the pipeline and sealing the channel. The connecting part is arranged on the side surface, extends away from the outer surface and is used for being detachably connected with the pipeline. And the plug is provided with an accommodating space for accommodating the pipeline between the connecting part and the sealing part.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a plug, an expansion kettle, a thermal management system and a vehicle. Background Art

[0002] Traditional fuel vehicles and new energy vehicles are equipped with cooling systems to ensure efficient operation of heat-generating components such as engines and batteries. The cooling system allows these heat-generating components to always operate in a reasonable temperature range, neither too hot nor too cold. Air will be generated in the flow channel during the operation of the internal water pump or when the coolant is added to the cooling system. If the cooling system cannot expel the air in the flow channel in time, the air will reduce the heat exchange efficiency of the cooling system and cause cavitation inside the flow channel. Therefore, the cooling system is usually equipped with an expansion kettle as an exhaust device.

[0003] The expansion kettle is designed with a vent for receiving air in the cooling circuit. The vent is generally a structure connected to the engine and radiator exhaust pipe. When the coolant is added, the residual air in the cooling system or the steam generated during the operation of the vehicle enters the expansion kettle through the vent, thereby separating from the liquid and leaving the cooling circuit. In some cooling systems equipped with a gas-liquid separator, the expansion kettle can be used as a component for filling coolant without designing a vent for gas-liquid separation. It can be seen that the expansion kettle is set differently for different ventilation requirements of different cooling systems, so that different cooling systems need to design and process different expansion kettles, which is costly. Utility Model Content

[0004] The present application provides a plug, an expansion kettle, a thermal management system and a vehicle to solve some or all of the deficiencies in the related art.

[0005] In a first aspect, the present application provides a plug for sealing a pipeline. The plug includes a main body, a sealing portion, and a connecting portion. The main body includes a sealing surface and an outer surface that are arranged opposite to each other, and a side surface connecting the sealing surface and the outer surface. The sealing portion is arranged on the sealing surface and extends away from the outer surface, and is used to be arranged in a channel of the pipeline and seal the channel. The connecting portion is arranged on the side surface and extends away from the outer surface, and is used to be detachably connected to the pipeline. The plug is provided with an accommodating space for accommodating the pipeline between the connecting portion and the sealing portion.

[0006] Furthermore, the connection portion is configured as a buckle on one side facing the accommodating space, for buckle connection with the pipeline.

[0007] Further, the connecting portion is provided in plurality. The plurality of connecting portions are evenly distributed around the main body. The plug further includes an elastic portion. The elastic portion connects the plurality of connecting portions. And / or, the plug further includes a reinforcing portion. The reinforcing portion is provided on the side surface and extends away from the main body.

[0008] Furthermore, the connecting parts are provided in two numbers. The plug further comprises: a reinforcing part and an elastic part. The reinforcing part is provided on the side surface and extends away from the main body. The number of the reinforcing part is one and is located between the two connecting parts. The elastic part is provided at one end of the connecting part away from the main body. The number of the elastic part is one and the two connecting parts are connected on the same side of the reinforcing part.

[0009] Further, the sealing portion includes a deformation space. The deformation space extends from the end surface of the sealing portion away from the main body toward the main body. And / or, the plug further includes a sealing ring. The sealing ring is arranged on the outer periphery of the sealing portion and is used to abut against the channel.

[0010] The second aspect of the present application provides an expansion kettle, comprising a kettle body and the plug described in the above embodiment. The kettle body comprises a ventilation duct. The ventilation duct comprises an inner channel and an outer peripheral surface. The sealing portion is arranged in the inner channel. The connecting portion is detachably connected to the outer peripheral surface. The plug is interference fit with the inner channel.

[0011] Furthermore, the sealing portion includes a deformation space. The deformation space extends from an end surface of the sealing portion away from the main body portion toward the main body portion. The extension length of the deformation space is greater than the matching length of the sealing portion and the ventilation duct.

[0012] Furthermore, the ventilation duct includes a first plug-in plane arranged on the outer peripheral surface and a second plug-in plane arranged on a wall surface of the inner channel close to the first plug-in plane. The first plug-in plane and the second plug-in plane are parallel. The sealing portion includes a matching plane. The matching plane and the second plug-in plane are in contact with each other.

[0013] A third aspect of the present application provides a thermal management system, comprising the expansion kettle described in the aforementioned embodiment.

[0014] A fourth aspect of the present application provides a vehicle, comprising the thermal management system described in the aforementioned embodiment.

[0015] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0016] It can be seen from the above embodiments that the connection part of the plug of the present application can improve the connection tightness between the plug and the pipeline and prevent leakage of pipeline liquid. The detachable connection method improves the assembly and disassembly convenience of the plug and the pipeline, and at the same time allows the pipeline to switch between two states: needing to be connected to other components and not needing to be connected to other components.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 Shown is a schematic diagram of the overall structure of an embodiment of an expansion kettle of the present application.

[0020] Figure 2 Shown as Figure 1 A partial enlarged schematic diagram of the expansion kettle is shown.

[0021] Figure 3 Shown is a partially enlarged cross-sectional schematic diagram of an embodiment of an expansion kettle of the present application.

[0022] Figure 4 Shown as Figure 3 A schematic cross-sectional view of the expansion kettle shown at another cutting angle.

[0023] Figure 5 Shown is a schematic diagram of the overall structure of an embodiment of the plug of the present application.

[0024] Figure 6 Shown as Figure 5 The overall structural schematic diagram of the plug from another angle is shown.

[0025] Figure 7 Shown is a partially enlarged cross-sectional schematic diagram of an embodiment of an expansion kettle of the present application.

[0026] Description of reference numerals:

[0027] 100 expansion kettle, 1 plug, 11 main body, 111 outer surface, 112 sealing surface, 113 side surface, 114 protrusion, 12 sealing portion, 121 deformation space, 122 matching plane, 13 connecting portion, 131 first protrusion, 14 accommodating space, 15 elastic portion, 16 reinforcement portion, 17 sealing ring, 2 kettle body, 21 ventilation pipe, 211 inner channel, 212 outer peripheral surface, 213 first plug-in plane, 214 second plug-in plane, 215 second protrusion, 3 pressure relief valve, 4 liquid outlet, D distance. DETAILED DESCRIPTION

[0028] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0030] The present application provides a thermal management system, which includes an expansion kettle.

[0031] like Figures 1 to 3 As shown, the expansion kettle 100 of the present application includes a plug 1 and a kettle body 2. The kettle body 2 includes a ventilation duct 21. The plug 1 is used to seal the ventilation duct 21. The plug 1 includes a main body 11, a sealing portion 12 and a connecting portion 13. The main body 11 includes an outer surface 111 and a sealing surface 112 that are arranged opposite to each other, and a side surface 113 connecting the sealing surface 112 and the outer surface 111. The sealing portion 12 is arranged on the sealing surface 112 and extends away from the outer surface 111. The connecting portion 13 is arranged on the side surface 113 and extends away from the outer surface 111. The plug 1 is provided with an accommodating space 14 for accommodating the ventilation duct 21 between the connecting portion 13 and the sealing portion 12. The ventilation duct 21 includes an inner channel 211 and an outer peripheral surface 212. The sealing portion 12 is arranged in the inner channel 211 and the plug 1 is interference fit with the inner channel 211 to seal the inner channel 211. The connecting portion 13 is detachably connected to the outer peripheral surface 212 of the ventilation duct 21 . In this way, the ventilation duct 21 is located in the accommodating space 14 .

[0032] The expansion kettle 100 is provided with a ventilation duct 21, so it can be connected to the engine, battery and other components through the ventilation duct 21. When the coolant of the thermal management system flows into the expansion kettle 100, the fluid and gas in the coolant can be separated to achieve a degassing effect. When a separate gas-liquid separator is provided in the thermal management system to achieve gas-liquid separation of the coolant, the pipeline of the thermal management system does not need to flow through the ventilation duct 21 of the expansion kettle 100. At this time, the expansion kettle 100 can seal the ventilation duct 21 through the plug 1 to prevent the fluid in the expansion kettle 100 from leaking through the ventilation duct 21.

[0033] The plug 1 and the inner channel 211 are interference-fitted, thereby achieving effective sealing, and at the same time, relative movement between the plug 1 and the ventilation pipe 21 can be avoided to a certain extent. The setting of the connecting portion 13 can further improve the connection tightness between the plug 1 and the kettle body 2 to avoid leakage. The detachable connection method improves the assembly convenience and disassembly convenience of the plug 1 and the expansion kettle 100.

[0034] The detachable connection between the plug 1 and the ventilation pipe 21 enables the expansion kettle 100 to switch between two use states: the ventilation pipe 21 needs to be connected to the pipe of the thermal management system, and the ventilation pipe 21 does not need to be connected to the pipe of the thermal management system. In this way, the expansion kettle 100 can be applied to thermal management systems with different requirements, and there is no need to open different molds of the expansion kettle 100 for different thermal management systems, which improves the versatility of the expansion kettle 100 and helps reduce the development cost and management cost of the thermal management system.

[0035] The expansion kettle 100 is also provided with a pressure relief valve 3, which is used to adjust the pressure change caused by the temperature change of the fluid inside the kettle body 2 to prevent the kettle body 2 from expanding or contracting. In addition, the pressure relief valve 3 can also expose the liquid filling port of the expansion kettle 100 when it is opened, so that, for example, maintenance personnel can add coolant to the thermal management system through the liquid filling port. The expansion kettle 100 also includes a liquid outlet 4 arranged below the kettle body 2. The liquid outlet 4 allows the fluid inside the expansion kettle 100 to flow out.

[0036] There are many ways to detachably connect the connection part 13 and the ventilation duct 21. For example, the connection part 13 is provided with an internal thread on the side facing the accommodation space 14, and the outer peripheral surface 212 of the ventilation duct 21 is provided with a corresponding external thread. The internal thread of the connection part 13 is threadedly connected with the external thread of the ventilation duct 21. Alternatively, the connection part 13 can also be connected to the ventilation duct 21 by magnetic adsorption. Figure 3 and Figure 4As shown, in some embodiments, the connection portion 13 is configured as a buckle toward the side of the accommodating space 14, which is used for buckle connection with the ventilation duct 21. The sealing portion 12 is interference fit with the inner channel 211, so the buckle connection method is relatively simpler, and only needs to be pressed hard along the direction of the ventilation duct 21 to achieve the sealing of the ventilation duct 21 by the plug 1. At the same time, considering that the diameter of the ventilation duct 21 is generally small, the volume of the plug 1 is also correspondingly small. Therefore, the processing of the plug 1 in the embodiment in which the connection portion 13 is configured as a buckle is simpler, and the steps are more streamlined. It should be noted that those skilled in the art can choose the setting method of the connection portion 13 according to the actual size of the ventilation duct 21. This application is not limited to this.

[0037] There are also many ways to snap-on connection. Figure 3 In the illustrated embodiment, the connecting portion 13 is provided with a first protrusion 131 on the side facing the accommodating space 14, and the ventilation duct 21 is correspondingly provided with a second protrusion 215 on the side facing the accommodating space 14. When the plug 1 is assembled to the ventilation duct 21, the second protrusion 215 of the ventilation duct 21 is located in the accommodating space 14, and abuts against the first protrusion 131 of the connecting portion 13. This arrangement can utilize the connection structure of the ventilation duct 21 and other pipes, so the connection between the plug 1 and the ventilation duct 21 does not require an additional structure to be provided on the ventilation duct 21. In other embodiments, for example, the second protrusion 215 of the ventilation duct 21 may cooperate with the groove on the connecting portion 13, or the first protrusion 131 of the connecting portion 13 may cooperate with the groove of the ventilation duct 21. The present application is not limited to this.

[0038] refer to Figure 5 and Figure 6 In an optional embodiment, a plurality of connection parts 13 are provided. The plurality of connection parts 13 are evenly distributed around the main body 11. The evenly distributed plurality of connection parts 13 can provide a plurality of fixing points in the circumferential direction of the plug 1. When the expansion kettle 100 is vibrated, the plurality of connection parts 13 can maintain the stability of the plug 1 and prevent the plug 1 from falling off. The number of connection parts 13 can be two as shown in the accompanying drawings, or three or four, and the present application does not limit the number. However, it should be understood that when the number of connection parts 13 is one, the connection part 13 can also provide the function of strengthening the connection between the plug 1 and the ventilation pipe 21, and can be set as follows Figure 5 The single cantilever structure shown may also be a structure that is arranged to extend entirely around the main body 11 .

[0039] Since the connection portion 13 is arranged on the side surface 113 and extends away from the outer surface 111, and the plug 1 is provided with an accommodating space 14 for accommodating the ventilation duct 21 between the connection portion 13 and the sealing portion 12, in the embodiment of multiple connection portions 13, the connection portion 13 is actually arranged in the form of multiple small cantilevers. On the basis that the ventilation duct 21 is relatively small and therefore the volume of the plug 1 is not large, the actual size of the connection portion 13 is also relatively small. In the embodiment in which the connection portion 13 includes multiple, the plug 1 can also include an elastic portion 15 connecting the multiple connection portions 13. The provision of the elastic portion 15 can play a role in connecting the multiple connection portions 13, and enhance the deformation ability and elasticity of the connection portion 13, thereby avoiding fracture at the connection position between the connection portion 13 and the main body 11.

[0040] like Figure 6 As shown, in an embodiment in which two connecting portions 13 are provided, the elastic portion 15 may connect the two connecting portions 13 only on one side. As mentioned above, since the plug 1 is relatively small in size, the elastic portion 15 provided only on one side can meet the requirements of the plug 1 for deformation capacity and elastic capacity. This arrangement can reduce the material cost of the plug 1 while meeting the performance requirements of the plug 1. The elastic portion 15 may be provided at an end of the connecting portion 13 away from the main body 11, thereby being away from the deformation position of the connecting portion 13 to avoid affecting the deformation of the connecting portion 13, thereby reducing the force required for assembly and disassembly. In other embodiments, the elastic portion 15 may also be provided at one end of the connecting portion 13 close to the main body 11 or at any position between the two ends.

[0041] In order to improve the strength of the plug 1, in some embodiments, the plug 1 further includes a reinforcing portion 16. The reinforcing portion 16 is disposed on the side surface 113 and extends away from the main body 11. The provision of the reinforcing member can improve the structural strength of the plug 1 of a small size to adapt to the stress during multiple plugging and unplugging processes and improve the service life. At the same time, the reinforcing member extends from the side surface 113 away from the main body 11, and can also provide a gripping position for the assembler during the plugging and unplugging process of the plug 1, facilitating assembly and disassembly.

[0042] Furthermore, if Figure 6 As shown, in the embodiment where there are two connecting parts 13 and the plug 1 is provided with a reinforcing part 16 and an elastic part 15, the number of the reinforcing part 16 and the elastic part 15 can be one. The reinforcing part 16 is located between the two connecting parts 13. The elastic part 15 is provided at one end of the connecting part 13 away from the main body 11. In addition, the elastic part 15 connects the two connecting parts 13 on the same side of the reinforcing part 16. Figure 6In the perspective shown, the elastic part 15 and the reinforcing part 16 are both located on the right side of the main body 11. In other embodiments, the elastic part 15 and the reinforcing part 16 can also be located on the left side of the main body 11. Since the plug 1 is small in size, one reinforcing part 16 and one elastic part 15 can also bring sufficient performance improvement. At the same time, the reinforcing part 16 and the elastic part 15 are arranged on the same side. After being assembled in the expansion kettle 100, the reinforcing part 16 and the elastic part 15 only occupy the space on one side, so that the space on the other side is saved, which is convenient for the routing of other pipelines of the thermal management system.

[0043] Since the plug 1 is used to seal the inner channel 211, the fluid does not need to flow through the plug 1, so the sealing portion 12 can actually be set as a solid structure. Figure 3 and Figure 4 As shown, the sealing portion 12 includes a deformation space 121. The deformation space 121 extends from the end surface of the sealing portion 12 away from the main body 11 toward the main body 11. In this embodiment, the interference fit between the plug 1 and the inner channel 211 is achieved by the deformation of the sealing portion 12. Since the sealing portion 12 needs to have an interference fit with the inner channel 211, the sealing portion 12 will produce a certain deformation when the plug 1 and the ventilation duct 21 are connected. The deformation space 121 allows the sealing portion 12 to be deformed, thereby facilitating the assembler to insert the sealing portion 12 into the inner channel 211 and reducing the difficulty of plugging and unplugging the plug 1.

[0044] In some embodiments, the extension length of the deformation space 121 is greater than the matching length of the sealing portion 12 and the ventilation duct 21. Figure 4 As shown, after the plug 1 is assembled on the ventilation pipe 21, there is still a distance D between the end face of the ventilation pipe 21 and the bottom face of the deformation space 121. This arrangement allows the deformation space 121 to be deformed at the positions where the sealing part 12 and the ventilation pipe 21 are matched, thereby facilitating the interference fit of the sealing part 12 matched with the ventilation pipe 21. The sealing part 12 that can be matched and deformed makes the plug 1 easier to plug and unplug.

[0045] Since the length of the deformation space 121 is longer than the sealing portion 12, the deformation space 121 will extend to the position of the main body 11. In some embodiments, the main body 11 also includes a protrusion 114 extending from the outer surface 111 away from the main body 11. The provision of the protrusion 114 increases the thickness of the main body 11. In this way, even if the deformation space 121 extends to the main body 11, the main body 11 has sufficient thickness to support the structural strength, avoid damage to the position where the wall thickness is too thin, and increase the service life of the plug 1. In addition, the provision of the protrusion 114 and the deformation space 121 improves the uniformity of the overall structural wall thickness of the plug 1, which is more conducive to production, while avoiding stress concentration problems at positions with large differences in wall thickness.

[0046] The plug 1 can be integrally formed, for example, an integrally formed plastic part formed by injection molding. In this way, the production efficiency of the plug 1 is improved, and the cost can also be reduced. In other embodiments, the plug 1 can also be a metal part, or a plastic part obtained by other non-integrated molding methods. This application is not limited to this.

[0047] In some embodiments, the plug 1 further includes a sealing ring 17. The sealing ring 17 is disposed on the outer periphery of the sealing portion 12 and is used to abut against the inner channel 211. In this embodiment, the interference fit between the plug 1 and the inner channel 211 is achieved by the sealing ring 17. As a universal part, the sealing ring 17 does not require additional production, which can effectively reduce production costs.

[0048] Furthermore, the plug 1 may have both the sealing portion 12 and the sealing ring 17 being interference fit with the inner channel 211, thereby providing double sealing protection. Figure 3 As shown, the sealing portion 12 may be provided with an annular groove so that the sealing ring 17 can be accommodated in the groove. When the plug 1 is assembled in the ventilation pipe 21, the sealing portion 12 is interference-fitted with the inner channel 211, and this process may cause the position of the sealing ring 17 to change. Therefore, the provision of the groove fixes the position of the sealing ring 17, and prevents the sealing ring 17 from being separated from the sealing portion 12 during assembly and disassembly.

[0049] Combined with reference Figure 6 and Figure 7 In some embodiments, the ventilation duct 21 includes a first plug-in plane 213 arranged on the outer peripheral surface 212 and a second plug-in plane 214 arranged on the wall of the inner channel 211 close to the first plug-in plane 213. The first plug-in plane 213 and the second plug-in plane 214 are parallel. The setting of the first plug-in plane 213 and the second plug-in plane 214 enables the ventilation duct 21 to adapt to the quick-insertion structure of the thermal management system pipeline, guide the direction of the pipeline and improve the assembly efficiency and disassembly efficiency. Correspondingly, the sealing part 12 includes a matching plane 122. When the sealing part 12 is assembled in the inner channel 211, the matching plane 122 and the second plug-in plane 214 fit together. In this way, the expansion kettle 100 can be used in thermal management systems that do not require ventilation ducts 21, as well as thermal management systems that use quick-insertion pipelines.

[0050] Based on the above embodiments, the present application also provides a vehicle. The vehicle includes the thermal management system described in the above embodiments. The expansion kettle 100 of the thermal management system can be switched between two usage states: the ventilation duct 21 needs to be connected to the pipe of the thermal management system, and the ventilation duct 21 does not need to be connected to the pipe of the thermal management system. In this way, the expansion kettle 100 can be used in the thermal management systems of vehicles with different needs, and there is no need to open different molds of the expansion kettle 100 for different vehicles, which is conducive to reducing the development cost and management cost of the vehicle.

[0051] It should be noted that the plug 1 can be used not only to seal the ventilation pipe 21 of the expansion kettle 100, but also to seal any pipe structure. The pipe structure can be a part of the expansion kettle 100, or a pipe of any other fluid storage structure. The present application does not limit this.

[0052] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A plug for sealing a pipeline, characterized in that: include: A main body, comprising a sealing surface and an outer surface arranged opposite to each other, and a side surface connecting the sealing surface and the outer surface; a sealing portion, disposed on the sealing surface and extending away from the outer surface, for being disposed in a channel of the pipeline and sealing the channel; as well as The connecting portion is arranged on the side surface and extends away from the outer surface, and is used for being detachably connected to the pipeline; the plug is provided with an accommodating space for accommodating the pipeline between the connecting portion and the sealing portion.

2. The plug according to claim 1, characterized in that: The connecting portion is configured as a buckle on one side facing the accommodating space, and is used for buckle connection with the pipeline.

3. The plug according to claim 1, characterized in that: The connecting parts are provided in plurality; the plurality of connecting parts are evenly distributed around the main body; the plug further comprises an elastic part; the elastic part connects the plurality of connecting parts; and / or, The plug further includes a reinforcement portion; the reinforcement portion is disposed on the side surface and extends away from the main body portion.

4. The plug according to claim 1, characterized in that: The connecting parts are provided with two; the plug further comprises: A reinforcing portion, disposed on the side surface and extending away from the main body; the number of the reinforcing portion is one, and the reinforcing portion is located between the two connecting portions; The elastic part is arranged at one end of the connecting part away from the main body part; the number of the elastic part is one, and two connecting parts are connected on the same side of the reinforcing part.

5. The plug according to any one of claims 1 to 4, characterized in that: The sealing portion comprises a deformation space; the deformation space extends from an end surface of the sealing portion away from the main body portion toward the main body portion; and / or, The plug further comprises a sealing ring; the sealing ring is arranged on the outer periphery of the sealing portion and is used for abutting against the channel.

6. An expansion kettle, characterized in that: include: The kettle body comprises a ventilation duct; the ventilation duct comprises an inner channel and an outer peripheral surface; The plug as described in any one of claims 1 to 5; the sealing portion is arranged in the inner channel; the connecting portion is detachably connected to the outer peripheral surface; the plug is interference fit with the inner channel.

7. The expansion kettle according to claim 6, characterized in that The sealing portion includes a deformation space; the deformation space extends from the end surface of the sealing portion away from the main body portion toward the main body portion; the extension length of the deformation space is greater than the matching length of the sealing portion and the ventilation duct.

8. The expansion kettle according to claim 6 or 7, characterized in that: The ventilation duct comprises a first plugging plane arranged on the outer peripheral surface and a second plugging plane arranged on a wall surface of the inner channel close to the first plugging plane; the first plugging plane and the second plugging plane are parallel; The sealing portion comprises a matching plane; the matching plane and the second plug-in plane are in contact with each other.

9. A thermal management system, characterized in that: Comprising an expansion kettle as described in any one of claims 7-8.

10. A vehicle, characterized in that: Comprising the thermal management system of claim 9.

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