Fluid control device and manufacturing method thereof

Abstract

This invention discloses a fluid control device and its manufacturing method. The fluid control device includes a first housing and a fluid control assembly. The first housing has a first receiving cavity, and at least a portion of the fluid control assembly is located in the first receiving cavity. The fluid control assembly includes a second housing, a valve core, a first sealing ring, and a limiting seat sealing assembly. The second housing has a second receiving cavity, and at least a portion of the valve core is located in the second receiving cavity. The first housing includes a first sidewall, and the second housing includes a second sidewall. The first housing has at least two first connecting ports penetrating the first sidewall, and the second housing has at least two second connecting ports penetrating the second sidewall. The second connecting ports communicate with the second receiving cavity, and the first connecting ports communicate with the second connecting ports. The limiting seat is located within the second connecting ports and is positioned to limit the valve core. The first sealing ring is sleeved between the wall surface of the second connecting port and at least a portion of the outer surface of the limiting seat. This facilitates improved integration of the fluid control device.

Description

Technical Field

[0001] This invention relates to the field of fluid control, and more specifically to a fluid control device and its manufacturing method. Background Technology

[0002] Some systems require multi-path fluid control components to control flow paths. To enable the fluid control component to control at least two flow paths, at least two flow channels need to be set on the fluid control component. When the fluid control component is applied to a fluid control device, multiple pipelines need to be set to connect the flow channels of the fluid control component with other components, which occupies a large space and is not conducive to improving the degree of integration. Summary of the Invention

[0003] The purpose of this invention is to provide a fluid control device and its manufacturing method, which can not only realize fluid control of at least two flow paths, but also facilitate integration with other components in the fluid control device, reduce the pipeline connection between the fluid control component and other components, and reduce space occupation.

[0004] On one hand, embodiments of the present invention provide a fluid control device,

[0005] The device includes a first housing and a fluid control assembly. The first housing has a first receiving cavity, and at least a portion of the fluid control assembly is located in the first receiving cavity. The fluid control assembly includes a second housing and a valve core. The second housing has a second receiving cavity, and at least a portion of the valve core is located in the second receiving cavity. The valve core is rotatable under a drive.

[0006] The first housing includes a first sidewall, the second housing includes a second sidewall, the first sidewall and the second sidewall are sealed together, the first housing has at least two first communication ports penetrating the first sidewall, the second housing has at least two second communication ports penetrating the second sidewall, the second communication ports are in communication with the second receiving cavity, and the first communication port is in communication with the second communication port;

[0007] The fluid control assembly further includes a first sealing ring and a limiting seat. The limiting seat has a communicating hole, and the second receiving cavity communicates with the first communicating port through the communicating hole. The limiting seat is located inside the second communicating port and is limited by the surface of the valve core facing the second side wall. The first sealing ring is sleeved between the wall surface of the second communicating port and at least a portion of the outer surface of the limiting seat, and the first sealing ring is sealed with the valve core.

[0008] On the other hand, embodiments of the present invention provide a method for manufacturing a fluid control device, comprising:

[0009] A first housing is provided, the first housing including a first sidewall and having at least two first communication openings through the first sidewall, the first housing having a first receiving cavity;

[0010] A fluid control assembly is formed, comprising: providing a second housing, a valve core, a first sealing ring, and a limiting seat; the second housing having a second receiving cavity and at least two second communicating ports; the second housing including a second sidewall; the second communicating ports penetrating the second sidewall and communicating with the second receiving cavity; the limiting seat having a communicating hole; placing the valve core in the second receiving cavity; fitting the first sealing ring onto the outer periphery of the limiting seat to form a sealing assembly; placing the sealing assembly within the second communicating ports such that the communicating holes communicate with the second receiving cavity; and limiting the limiting seat and the valve core on the surfaces facing the second sidewall.

[0011] The fluid control assembly is placed inside the first receiving cavity, and the first communication port is aligned and connected to the second communication port.

[0012] According to the fluid control device and manufacturing method of the present invention, the fluid control device includes a first housing and a fluid control component. The fluid control component is located in a first receiving cavity of the first housing. The fluid control component includes a second housing, a valve core, a first sealing ring, and a limiting seat. The valve core is located in a second receiving cavity of the second housing. The first sealing ring and the limiting seat are both located in a second communication port of the second housing, so that the fluid control component can be assembled into a whole. When the first housing is a structure formed by other components of the thermal management system, the fluid control component can be installed as a whole into the first receiving cavity of the first housing and the second communication port is connected to the first communication port of the first housing. Compared with connecting the flow port of the fluid control component to other components in the thermal management system through pipelines, the fluid control device of the present invention can omit the pipelines between the fluid control component and other components in the thermal management system, which can improve the integration of the fluid control device, reduce the space occupied by the fluid control device, and make the structure of the fluid control device more compact. Attached Figure Description

[0013] Figure 1 This is an exploded structural diagram of the fluid control device provided in the first embodiment of the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the fluid control component provided in the first embodiment of the present invention;

[0015] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a portion of the fluid control device is shown in the figure;

[0016] Figure 4This is a schematic diagram of the structure of a limiting seat provided in one embodiment of the present invention;

[0017] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure of the limiting seat provided in the diagram;

[0018] Figure 6 This is a schematic diagram of the structure of the second housing provided in the first embodiment of the present invention;

[0019] Figure 7 yes Figure 6 A schematic cross-sectional view of the second shell is shown in the figure;

[0020] Figure 8 This is a schematic diagram of the valve core provided in the first embodiment of the present invention;

[0021] Figure 9 This is a schematic diagram of the top cover provided in one embodiment of the present invention;

[0022] Figure 10 This is a schematic diagram of the structure of the first housing provided in the first embodiment of the present invention;

[0023] Figure 11 This is a cross-sectional schematic diagram of a partial structure of the fluid control device provided in the second embodiment of the present invention;

[0024] Figure 12 This is a cross-sectional schematic diagram of a partial structure of the fluid control device provided in the third embodiment of the present invention;

[0025] Figure 13 yes Figure 12 The diagram shows an exploded view of the fluid control components in a fluid control device.

[0026] Figure 14 This is a schematic flowchart of a method for manufacturing a fluid control device according to an embodiment of the present invention. Detailed Implementation

[0027] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0028] like Figures 1-3As shown, this embodiment of the invention provides a fluid control device 1, including a first housing 10 and a fluid control assembly 20. The first housing 10 has a first receiving cavity 15, and at least a portion of the fluid control assembly 20 is located in the first receiving cavity 15. The fluid control assembly 20 includes a second housing 21, a valve core 22, and at least two sealing assemblies 23. The second housing 21 has a second receiving cavity 217, and at least a portion of the valve core 22 is located in the second receiving cavity 217. The valve core 22 can rotate under a drive. In some embodiments, the fluid control device 1 further includes a control device 60, and the valve core 22 can rotate under the drive of a drive member within the control device 60. For example, the drive member can be a motor or a motor and a reduction gear set. By controlling the rotation of the valve core 22, the conducting cavity of the valve core 22 can open the communication port on the fluid control device 1, thereby realizing the control of the fluid by the fluid control device 1.

[0029] The first housing 10 includes a first sidewall 11 and at least two connecting pipes, at least a portion of which is located outside the first receiving cavity 15 and protrudes from the first sidewall 11. The second housing 21 includes a second sidewall 211, and the first sidewall 11 and the second sidewall 211 are sealed together to prevent fluid leakage between them. The first housing 10 also has at least two channels 13 that penetrate the connecting pipes and form a first communication port 131 through the first sidewall 11. The second housing 21 has at least two second communication ports 212 that penetrate the second sidewall 211 and communicate with the second receiving cavity 217. The first communication port 131 of the first housing 10 communicates with the second receiving cavity 217 through the second communication ports 212.

[0030] To achieve a seal for the fluid control device 1, combined with Figures 1 to 5The number of sealing components 23 in the fluid control device 1 is equal to the number of second communication ports 212 and the number of first communication ports 131. In some embodiments, the sealing components 23 are located in the second communication ports 212. The sealing components 23 include a first sealing ring 231 and a limiting seat 232. The limiting seat 232 has a communication hole 2324. The second receiving cavity 217 communicates with the first communication port 131 through the communication hole 2324. The limiting seat 232 is located in the second communication port 212 and is limited by the surface of the valve core 22 facing the second side wall 211. The first sealing ring 231 is installed in the second communication port 212 through the limiting seat 232. The first sealing ring 231 is sleeved between the wall surface of the second communication port 212 and at least part of the outer surface of the limiting seat 232. The first sealing ring 231 and the valve core 22 are sealed together. With the above configuration, the valve core 22 and sealing assembly 23 can be assembled onto the second housing 21, allowing the fluid control assembly 20 to be assembled as a whole. When the first housing 10 is a structure formed by other components of the thermal management system, the fluid control assembly 20 can be installed entirely into the first receiving cavity 15 of the first housing 10. Compared to connecting the flow port of the fluid control assembly 20 to other components in the thermal management system via pipelines, the fluid control device 1 of this embodiment can omit the pipelines between the fluid control assembly 20 and other components in the thermal management system, thereby improving the integration of the fluid control device 1. Simultaneously, by fitting the sealing assembly 23 into the second communication port 212 of the second housing 21, the first sealing ring 231 is also fitted into the second communication port 212. Compared to setting the seal as a ring structure surrounding the valve core 22, the contact area between the first sealing ring 231 and the valve core 22 in the fluid control device 1 of this embodiment is smaller, which can relatively reduce the driving force required for the valve core 22 to rotate.

[0031] like Figure 1 and Figure 3 As shown, to achieve a seal between the first sidewall 11 and the second sidewall 211, in some embodiments, the fluid control device further includes a first sealing element 30. At least a portion of the first sealing element 30 is sandwiched between the first sidewall 11 and the second sidewall 211. In this case, the first sealing element 30 is deformed by the compression of the first sidewall 11 and the second sidewall 211, forming a sealing surface between the first sealing element 30 and both the first sidewall 11 and the second sidewall 211, thus achieving a seal. Further, in some embodiments, a first sealing ring 231 is fitted onto the outer periphery of a portion of the limiting seat 232 and sandwiched between the valve core 22 and the limiting seat 232. In this case, the first sealing ring 231 is deformed by the compression between the valve core 22 and the limiting seat 232, achieving a sealing effect. In specific implementations, the cross-section of the first sealing ring 231 along the direction perpendicular to the axial direction of the first sealing ring 231 can be annular, in which case the first sealing ring 231 is an O-ring.

[0032] Based on this, such as Figures 3 to 5 As shown, in some embodiments, the limiting seat 232 has a communicating hole 2324, which communicates with the first communicating port 131. To achieve the squeezing effect of the valve core 22 and the limiting seat 232 on the first sealing ring 231, along the thickness direction of the limiting seat 232, the limiting seat 232 includes a first limiting portion 2321, a stepped portion 2322, and a second limiting portion 2323. The stepped portion 2322 is located between the first limiting portion 2321 and the second limiting portion 2323. Along the thickness direction of the limiting seat 232, the stepped portion 2322 is projected onto the stepped portion 2322. At least a portion of the orthographic projection of the first limiting portion 2321 and the second limiting portion 2323 are projected onto the stepped portion 2322. At least a portion of the orthographic projection of 323 is located inside the orthographic projection of the step portion 2322. The first sealing ring 231 is sleeved on the outer periphery of the first limiting portion 2321 and sandwiched between the valve core 22 and the step portion 2322. The first sealing member 30 includes two mutually sleeved parts, namely a first sub-part and a second sub-part. The first sub-part is sleeved on the outer periphery of the second sub-part, and the second sub-part is sleeved on the outer periphery of the second limiting portion 2323. Along the height direction perpendicular to the fluid control device, the first sub-part is sandwiched between the first sidewall 11 and the second sidewall 211, and the second sub-part is sandwiched between the step portion 2322 and the first sidewall 11. With the above arrangement, the first sealing member 30 can not only achieve sealing of the first sidewall 11 and the second sidewall 211 at the communication port position, but also achieve sealing of the first sidewall 11 and the limiting seat 232 at the communication port position.

[0033] To achieve clamping of the first seal 30, the first housing 10 can also have a first groove. The first groove is recessed from the inner surface of the first sidewall 11 into the interior of the first sidewall 11. At least a portion of the first seal 30 is located in the first groove, and the depth of the first groove is less than the thickness of the first seal 30. This allows the second sidewall 211 of the second housing 21 and the first sidewall 11 of the first housing 10 to clamp and compress the first seal 30 after the fluid control assembly 20 is assembled into the first receiving cavity 15 of the first housing 10, thereby achieving a seal between the first sidewall 11 and the second sidewall 211. Or as... Figure 3 , Figure 6 and Figure 7As shown, the second housing 21 has a second groove 218, which is recessed from the outer surface of the second sidewall 211 toward the interior of the second sidewall 211. At least a portion of the first seal 30 is located in the second groove 218, and the depth of the second groove 218 is less than the thickness of the first seal 30. Alternatively, the first housing 10 may have a first groove, which is recessed from the inner surface of the first sidewall 11 toward the interior of the first sidewall 11. The second housing 21 has a second groove 218, which is recessed from the outer surface of the second sidewall 211 toward the interior of the second sidewall 211. The first groove and the second groove 218 communicate and form a receiving space. At least a portion of the first sub-part 31 is located within the receiving space. The distance of the receiving space along the thickness direction of the first seal 30 is less than the thickness of the first seal 30. This invention does not limit this aspect.

[0034] When the fluid control device 1 has a first seal 30, during assembly, the first seal 30 can be assembled with the fluid control assembly 20 first, and then the whole assembly can be installed into the first receiving cavity 15 of the first housing 10. To prevent the first seal 30 and the fluid control assembly 20 from shifting when installed into the first receiving cavity 15, in some embodiments, the first housing 10 further includes a first rib protruding from the first sidewall 11. The first rib extends along the height direction of the first housing 10. Optionally, the first rib can be a strip-shaped rib, and the length direction of the strip-shaped rib is parallel to the height direction of the first housing 10. The first sealing element 30 includes a first limiting groove, which is recessed from the outer surface of the first sealing element 30 into the interior of the first sealing element 30, and a first protruding rib is embedded in the first limiting groove; alternatively, the first sealing element 30 includes a main body portion and a second protruding rib, which protrudes from the main body portion 33 and extends along the height direction of the main body portion. Optionally, the second protruding rib can be a strip-shaped protruding rib, the length direction of which is parallel to the height direction of the first sealing element 30. The first sidewall 11 includes a second limiting groove, which is recessed from the inner surface of the first sidewall 11 into the interior of the first sidewall 11, and the second protruding rib is embedded in the second limiting groove. By embedding the protruding rib into the limiting groove, the first sealing element 30 and the first housing 10 are limited, preventing the first sealing element 30 from moving around.

[0035] Please refer to further information. Figure 3 and Figure 8In some embodiments, the main body of the valve core 22 is a columnar structure, and the second housing 21 also has a second bottom wall 213. The second bottom wall 213 is located at one end of the second side wall 211 and is integrally formed or sealed with the second side wall 211. The valve core 22 has a third groove 222 and a connecting cavity 221. Along the height direction of the fluid control device 1, the connecting cavity 221 is located between the third groove 222 and the second bottom wall 213. The third groove 222 and the connecting cavity 221 are both recessed from the outer peripheral surface of the valve core 22 toward the interior of the valve core 22. Rotating the valve core 22 can enable the connecting cavity 221 to connect the corresponding two second connecting ports 212. The fluid control assembly 20 also includes a second sealing ring 25. The second sealing ring 25 is located in the third groove 222 and sandwiched between the valve core 22 and the second housing 21. The second sealing ring 25 is sealed with the valve core 22 and the second side wall 211 respectively. The longitudinal section of the second sealing ring 25 is annular. At this time, the second sealing ring 25 can be an O-ring. The above settings enable the fluid control components and fluid control devices to have good sealing performance.

[0036] In some embodiments, the valve core 22 has a through cavity 221, which is recessed from the outer peripheral surface of the valve core 22 into the interior of the valve core 22. Rotation of the valve core 22 allows the through cavity 221 to connect two corresponding communication ports. The cross-sectional area of ​​the opening of the through cavity 221 is smaller than the cross-sectional area of ​​the outer peripheral surface of the first limiting portion 2321 of the limiting seat 232, allowing the valve core 22 to define the installation position of the limiting seat 232. A gap exists between the surface of the first limiting portion 2321 of the limiting seat 232 facing the valve core 22 and the valve core 22. This configuration reduces the force exerted by the limiting seat 232 on the valve core 22 during rotation, improving the stability of the valve core 22's rotation and reducing the driving torque.

[0037] like Figure 3 , Figures 7 to 10As shown, in some embodiments, the first housing 10 further includes a first bottom wall 12, the first bottom wall 12 and the first side wall 11 enclosing a first receiving cavity 15; the second housing 21 further includes a second bottom wall 213, the second bottom wall 213 and the second side wall 211 enclosing a second receiving cavity 217; the second bottom wall 213 is disposed adjacent to the first bottom wall 12; the main body of the valve core 22 is a columnar structure; at least a portion of the outer surface of the valve core 22 has a gap with the outer surface of the second housing 21 to reduce the resistance encountered by the valve core 22 when rotating; the fluid control device 1 further includes a top cover 40; the fluid control assembly 20 is located between the top cover 40 and the first bottom wall 12; and the top cover 40 is fixedly connected to the first housing 10 by fasteners; the top cover 40 has a top wall 42 and a first protrusion 41 protruding from the top wall; the first protrusion 41 is located in the second receiving cavity 217; the second housing 21 further includes a second bottom wall 213 and a first protrusion 41 protruding from the first bottom wall 12. The second protrusion 214 of the second bottom wall 213 has one of the first protrusion 41 and the second protrusion 214 in contact with the valve core 22. The height of the valve core 22 located between the first protrusion 41 and the second protrusion 214 is less than the interval between the first protrusion 41 and the second protrusion 214. The height of the valve core 22 located between the first protrusion 41 and the second protrusion 214 is defined as the first distance, and the interval between the first protrusion 41 and the second protrusion 214 is defined as the second distance. The values ​​of the first distance and the second distance can be set according to the user's needs. For example, the first distance can be 0.2mm smaller than the second distance. By setting the first protrusion 41 and the second protrusion 214, the position of the valve core 22 along the height direction of the fluid control device 1 can be limited. And by setting the first distance to be less than the second distance, the valve core 22 is prevented from getting stuck during rotation.

[0038] like Figure 3 , Figure 6 and Figure 10 As shown, in some embodiments, one of the first housing 10 and the second housing 21 includes a protruding structure, and the other includes a recessed structure. The protruding structure is embedded in the recessed structure to limit the first bottom wall 12 and the second bottom wall 213, thereby limiting the installation position between the fluid control assembly and the first housing 10, so that the fluid control assembly 20 is coaxially arranged with the inner surface of the first housing 10. In specific implementations, such as... Figure 10 As shown, a recessed structure 17 can be provided on the first housing 10, extending from the inner surface of the first bottom wall 12 toward the interior of the first bottom wall 12. A protruding structure 216 is provided on the second housing 21, extending from the outer surface of the second bottom wall 213 toward the direction away from the second receiving cavity 217. The protruding structure 216 is embedded in the recessed structure 17 to define the position between the second housing 21 and the first housing 10.

[0039] like Figures 11 to 13 As shown, Figure 11 This diagram shows a partial cross-sectional view of the fluid control device provided in the second embodiment of the present invention. Figure 12 A partial cross-sectional view of the fluid control device provided in the third embodiment of the invention is shown. Figure 13 This is an exploded structural diagram of the fluid control assembly provided in the third embodiment of the present invention. The fluid control devices provided in the second and third embodiments are structurally similar to the first fluid control device, except that the inner surface of the first housing 10 is conical, and the radial dimension of the inner surface of the first housing 10 decreases along the height direction of the control valve and towards the first bottom wall 12. The outer surface of the second housing 21 is conical, and the radial dimension of the outer surface of the second housing 21 decreases along the direction close to the first bottom wall 12. The inner surface of the second housing 21 is conical, and the radial dimension of the inner surface of the second housing 21 decreases along the direction close to the first bottom wall 12. The main body of the outer surface of the valve core 22 is conical, and the radial dimension of the outer surface of the valve core 22 decreases along the direction close to the first bottom wall 12. With the above configuration, it is convenient for the valve core 22 to be installed into the second receiving cavity 217, and it is also convenient for the fluid control assembly 20 to be installed into the first receiving cavity 15.

[0040] like Figure 12 and Figure 13 As shown, compared to the fluid control device provided in the first and second embodiments, the first seal 30 can be omitted. In this embodiment, the thickness of the first sealing ring 231 is greater than or equal to the thickness of the limiting seat 232. Along the thickness direction of the first sealing ring 231, the first sealing ring 231 passes through the second communication port and is sandwiched between the valve core 22 and the first side wall 11. One end of the first sealing ring 231 forms a sealing surface with the valve core 22, and the other end of the first sealing ring 231 forms a sealing surface with the first side wall 11. At the same time, the first sealing ring 231 is pressed between the limiting seat 232 and the wall surface of the second communication port, thereby achieving the sealing performance of the fluid control device 1 at the communication port.

[0041] In summary, according to the fluid control device 1 provided in the embodiment of the present invention, the fluid control device 1 includes a first housing 10 and a fluid control assembly 20. The fluid control assembly 20 is located in the first receiving cavity 15 of the first housing 10. The fluid control assembly 20 includes a second housing 21, a valve core 11, a first sealing ring 231, and a limiting seat 232. The valve core 21 is located in the second receiving cavity 217 of the second housing 21. The first sealing ring 231 and the limiting seat 232 are both located in the second communication port 212 of the second housing 21, so that the fluid control assembly 20 can be assembled into a whole. When the first housing 10 is a thermal management system... When the fluid control component 20 is integrated into the first receiving cavity 15 of the first housing 10, the second connecting port 212 is connected to the first connecting port 131. Compared with connecting the flow port of the fluid control component 20 to other components in the thermal management system through pipelines, the fluid control device 1 of this embodiment can omit the pipeline between the fluid control component 20 and other components in the thermal management system, thereby improving the integration of the fluid control device 1, reducing the space occupied by the fluid control device 1, making the structure of the fluid control device 1 more compact, and facilitating its widespread application.

[0042] like Figure 14 As shown, this embodiment of the invention provides a method for manufacturing a fluid control device, combined with... Figures 1 to 13 The manufacturing method of the fluid control device provided in this embodiment of the invention includes:

[0043] S110, Provide the first housing 10.

[0044] The first housing 10 has a first receiving cavity 15 and at least two channels 13. The first housing 10 includes a first sidewall 11, and the channels 13 penetrate the first sidewall 11 to form a first communication port 131.

[0045] S120, forming fluid control assembly 20.

[0046] In this embodiment, step S120 includes: providing a second housing 21, a valve core 22, a first sealing ring 231, and a limiting seat 232. The second housing 21 has a second receiving cavity 217 and at least two second connecting ports 212. The second housing 21 includes a second sidewall 211. The second connecting ports 212 penetrate the second sidewall 211 and communicate with the second receiving cavity 217. The limiting seat 232 has a connecting hole 2324. The valve core 22 is placed in the second receiving cavity 217. The first sealing ring 231 is sleeved on the outer periphery of the limiting seat 232 to form a sealing assembly 23. The sealing assembly 23 is placed in the second connecting port 212 so that the connecting hole 2324 communicates with the second receiving cavity 217. The limiting seat 232 and the valve core 22 are limited and positioned on the surface of the second sidewall 211. At this time, the fluid control assembly 20 is an integral structure.

[0047] S130. Place the fluid control assembly 20 in the first receiving cavity 15 and align and connect the first connecting port 131 and the second connecting port 212.

[0048] The fluid control device of any of the above embodiments in the present invention can be manufactured by the above-described fluid control device manufacturing method. According to the fluid control device manufacturing method provided in the present invention, the fluid control component 20 can be assembled into a stable integral structure and installed in the first receiving cavity 15 of the first housing 10, which can eliminate the pipeline between the fluid control component 20 and other components in the thermal management system and improve the integration of the fluid control device 1.

[0049] When the fluid control device 1 also includes a first seal 30, the first seal 30 can be assembled with the sealing assembly 23 first, and then the first seal 30 and the sealing assembly 23 can be fitted together into the second communication port 212. When the fluid control assembly 20 also includes a second sealing ring 25, the second sealing ring 25 can be fitted into the third groove 222 of the valve core 22 first, and then the second sealing ring 25 and the valve core 22 can be fitted together into the first receiving cavity 15 of the first housing 10.

[0050] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. For example, the directional definitions such as "front", "back", "left", "right", "up", and "down" are used. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify, combine or make equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A fluid control device, characterized in that, The fluid control assembly includes a second housing and a valve core, the second housing having a second receiving cavity, at least a portion of the valve core being located in the second receiving cavity, and the valve core being rotatable under a drive; The fluid control assembly further includes a first sealing ring and at least two limiting seats. The limiting seats are distributed along the circumferential direction of the second housing. Each limiting seat has a communicating hole that communicates with the second receiving cavity. Along the height direction of the fluid control assembly, at least a portion of the first sealing ring is located between the limiting seat and the second housing. The first sealing ring is sealed to the valve core. The fluid control device further includes a first housing having a first receiving cavity, at least a portion of the fluid control assembly being located in the first receiving cavity, the first housing including a first sidewall, the second housing including a second sidewall, the first sidewall and the second sidewall being sealed together, the first housing having at least two first communication ports penetrating the first sidewall, the second housing having at least two second communication ports penetrating the second sidewall, the second communication ports communicating with the second receiving cavity, the first communication port communicating with the second communication port, and the second receiving cavity communicating with the first communication port through the communication hole; Along the thickness direction of the limiting seat, the limiting seat includes a stepped portion and a second limiting portion. Projecting onto the stepped portion along the thickness direction of the limiting seat, at least a portion of the orthographic projection of the second limiting portion is located inside the stepped portion. The fluid control device further includes a first sealing member, which includes a first sub-part and a second sub-part. The second sub-part is sleeved on the outer periphery of the second limiting portion, and the first sub-part is sleeved on the outer periphery of the second sub-part. Along the height direction perpendicular to the fluid control device, the first sub-part is sandwiched between the first sidewall and the second sidewall, and a portion of the second sub-part is sandwiched between the stepped portion and the first sidewall.

2. The fluid control device according to claim 1, characterized in that, The limiting seat is located inside the second communication port and is positioned relative to the surface of the valve core facing the second side wall. The first sealing ring is located between the wall surface of the second communication port and at least a portion of the outer surface of the limiting seat.

3. The fluid control device according to claim 2, characterized in that, The limiting seat further includes a first limiting part, and the stepped part is located between the first limiting part and the second limiting part. Projecting along the thickness direction of the limiting seat onto the stepped portion, at least a portion of the orthographic projection of the first limiting portion is located inside the stepped portion, and the first sealing ring is sleeved on the outer periphery of the first limiting portion and sandwiched between the valve core and the stepped portion.

4. The fluid control device according to claim 3, characterized in that, The first housing has a first groove recessed from the inner surface of the first sidewall toward the first sidewall, at least a portion of the first seal is located in the first groove, and the depth of the first groove is less than the thickness of the first seal. Alternatively, the second housing has a second groove recessed from the outer surface of the second sidewall toward the interior of the second sidewall, at least a portion of the first seal is located in the second groove, and the depth of the second groove is less than the thickness of the first seal. Alternatively, the first housing has a first groove recessed from the inner surface of the first sidewall toward the interior of the first sidewall, and the second housing has a second groove recessed from the outer surface of the second sidewall toward the interior of the second sidewall. The first groove and the second groove communicate with each other and form a receiving space, at least a portion of the first seal is located within the receiving space, and the distance of the receiving space along the thickness direction of the first seal is less than the thickness of the first seal.

5. The fluid control device according to claim 2, characterized in that, The thickness of the first sealing ring is greater than or equal to the thickness of the limiting seat. Along the thickness direction of the first sealing ring, the first sealing ring passes through the second communication port and is sandwiched between the valve core and the first side wall. One end of the first sealing ring forms a sealing surface with the valve core, and the other end of the first sealing ring forms a sealing surface with the first side wall.

6. The fluid control device according to any one of claims 2 to 5, characterized in that, The first housing further includes a first bottom wall, the first bottom wall and the first side wall defining the first receiving cavity; the second housing further includes a second bottom wall, the second bottom wall and the second side wall defining the second receiving cavity; the second bottom wall is disposed adjacent to the first bottom wall; one of the first housing and the second housing includes a protruding structure, and the other includes a recessed structure; the protruding structure is embedded in the recessed structure to limit the first bottom wall and the second bottom wall. The second housing is coaxially arranged with the first housing.

7. The fluid control device according to claim 6, characterized in that, The main body of the valve core is a columnar structure. The second bottom wall and the second side wall are integrally formed or sealed. The valve core has a third groove and a connecting cavity. Along the height direction of the fluid control device, the connecting cavity is located between the third groove and the second bottom wall. Both the third groove and the connecting cavity are recessed from the outer peripheral surface of the valve core towards the interior of the valve core. Rotating the valve core allows the connecting cavity to connect the two corresponding second communication ports. The fluid control assembly further includes a second sealing ring, which is located in the third groove and sandwiched between the valve core and the second sidewall, and the second sealing ring is respectively sealed between the valve core and the second sidewall.

8. The fluid control device according to claim 6, characterized in that, The main body of the valve core has a columnar structure, and at least a portion of the outer surface of the valve core has a gap with the inner surface of the second housing. The fluid control device further includes a top cover, the fluid control component is located between the top cover and the first bottom wall, and the top cover is fixedly connected to the first housing by fasteners. The top cover abuts against the second housing. The top cover has a top wall and a first protrusion protruding from the top wall. The first protrusion is located in the second receiving cavity. The second housing further includes a second protrusion protruding from the second bottom wall. The second protrusion is located in the second receiving cavity. One of the first protrusion and the second protrusion contacts the valve core. The height of the valve core located between the first protrusion and the second protrusion is less than the interval distance between the first protrusion and the second protrusion.

9. The fluid control device according to any one of claims 2 to 5, characterized in that, The first housing also includes a first rib protruding from the first sidewall, the first rib extending along the height direction of the first housing, the first seal includes a first limiting groove, the first limiting groove being recessed from the outer surface of the first seal to the inside of the first seal, and the first rib being embedded in the first limiting groove. Alternatively, the first seal includes a main body and a second rib, the second rib protruding from the main body, the first sidewall including a second limiting groove, the second limiting groove being recessed from the inner surface of the first sidewall toward the interior of the first sidewall, and the second rib being embedded in the second limiting groove.

10. The fluid control device according to any one of claims 2 to 5, characterized in that, The first housing further includes a first bottom wall, and the main body of the inner surface of the first housing, the outer surface of the second housing, the inner surface of the second housing, and the outer surface of the valve core are all tapered structures. Along the height direction of the fluid control device and pointing towards the first bottom wall, the radial dimension of the inner surface of the first housing decreases, the radial dimension of the outer surface of the second housing decreases, the radial dimension of the inner surface of the second housing decreases, and the radial dimension of the outer surface of the valve core decreases.

11. A method for manufacturing a fluid control device, characterized in that, include: Forming a fluid control assembly, including: A second housing, a valve core, a first sealing ring, and a limiting seat are provided. The second housing has a second receiving cavity and at least two second communicating ports. The second housing includes a second sidewall. The second communicating ports penetrate the second sidewall and communicate with the second receiving cavity. The limiting seat has a communicating hole. Along the thickness direction of the limiting seat, the limiting seat includes a stepped portion and a second limiting portion. Place the valve core in the second receiving cavity; The first sealing ring is fitted onto the outer periphery of the limiting seat to form a sealing assembly; The sealing assembly is placed in the second communication port so that the communication hole communicates with the second receiving cavity, and the limiting seat and the surface of the valve core facing the second side wall are limited; The method further includes: A first housing and a first seal are provided. The first housing includes a first sidewall and has at least two first communication openings penetrating the first sidewall. The first housing has a first receiving cavity. The first seal includes a first sub-part and a second sub-part, with the first sub-part sleeved on the outer peripheral side of the second sub-part. After forming the fluid control assembly, the method further includes: The fluid control assembly and the first seal are placed in the first receiving cavity, and the first communication port and the second communication port are aligned and connected, such that the second sub-part is sleeved on the outer periphery of the second limiting part, the first sub-part is sandwiched between the first side wall and the second side wall, and a portion of the second sub-part is sandwiched between the step part and the first side wall.

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