CN115405715A - Fluid control device and method for manufacturing the same - Google Patents

Abstract

The invention discloses a fluid control device and a manufacturing method thereof, wherein the fluid control device comprises a first shell and a fluid control assembly, the first shell is provided with a first accommodating cavity, at least part of the fluid control assembly is positioned in the first accommodating cavity, the fluid control assembly comprises a second shell, a valve core, a first sealing ring and a limiting seat sealing assembly, the second shell is provided with a second accommodating cavity, and at least part of the valve core is positioned in the second accommodating cavity; the first shell comprises a first side wall, the second shell comprises a second side wall, the first shell is provided with at least two first communication ports penetrating through the first side wall, the second shell is provided with at least two second communication ports penetrating through the second side wall, the second communication ports are communicated with the second accommodating cavity, and the first communication ports are communicated with the second communication ports; the limiting seat is positioned in the second communication port and is limited with the valve core, and the first sealing ring is sleeved between the wall surface of the second communication port and at least part of the outer surface of the limiting seat; this can facilitate an increase in the integration of the fluid control device.

Description

Fluid control device and method for manufacturing the same

Technical Field

The invention relates to the field of fluid control, in particular to a fluid control device and a manufacturing method thereof.

Background

Some systems need to use the fluid control assembly of multichannel with the control flow path, for realizing the fluid control assembly to the fluid control of two at least flow paths, need set up two at least runners on the fluid control assembly, when fluid control assembly was used to fluid control device, need set up a plurality of pipelines and communicate the runner of fluid control assembly with other parts, and occupation space is great, is unfavorable for improving the degree of integrating.

Disclosure of Invention

The invention aims to provide a fluid control device and a manufacturing method thereof, which not only can realize fluid control of at least two flow paths, but also can be conveniently integrated with other components in the fluid control device, reduce pipeline connection between a fluid control assembly and other components and reduce space occupation.

In one aspect, embodiments of the present invention provide a fluid control device,

the valve comprises a first shell and a fluid control assembly, wherein the first shell is provided with a first containing cavity, at least part of the fluid control assembly is positioned in the first containing cavity, the fluid control assembly comprises a second shell and a valve core, the second shell is provided with a second containing cavity, at least part of the valve core is positioned in the second containing cavity, and the valve core can rotate under the drive;

the first shell comprises a first side wall, the second shell comprises a second side wall, the first side wall and the second side wall are arranged in a sealing mode, the first shell is provided with at least two first communication ports penetrating through the first side wall, the second shell is provided with at least two second communication ports penetrating through the second side wall, the second communication ports are communicated with the second accommodating cavity, and the first communication ports are communicated with the second communication ports;

the fluid control assembly further comprises a first sealing ring and a limiting seat, the limiting seat is provided with a communication hole, the second accommodating cavity is communicated with the first communication hole through the communication hole, the limiting seat is located in the second communication hole and is limited to the surface of the valve core facing the second side wall, the first sealing ring is sleeved between the wall surface of the second communication hole and at least part of the outer surface of the limiting seat, and the first sealing ring is sealed with the valve core.

In another aspect, an embodiment of the present invention provides a method for manufacturing a fluid control device, including:

providing a first shell, wherein the first shell comprises a first side wall and is provided with at least two first communication ports penetrating through the first side wall, and the first shell is provided with a first accommodating cavity;

forming a fluid control assembly comprising: providing a second shell, a valve core, a first sealing ring and a limiting seat, wherein the second shell is provided with a second accommodating cavity and at least two second communication ports, the second shell comprises a second side wall, the second communication ports penetrate through the second side wall and are communicated with the second accommodating cavity, and the limiting seat is provided with a communication hole; placing the valve core in the second accommodating cavity; sleeving the first sealing ring on the outer peripheral side of the limiting seat to form a sealing assembly; placing the sealing assembly in the second communication hole to enable the communication hole to be communicated with the second accommodating cavity, and limiting the limiting seat and the surface of the valve core facing the second side wall;

placing the fluid control assembly in the first receiving cavity and placing the first communication port in aligned communication with the second communication port.

According to the fluid control device and the manufacturing method thereof provided by the embodiment of the invention, the fluid control device comprises a first shell and a fluid control assembly, the fluid control assembly is positioned in a first accommodating cavity of the first shell, the fluid control assembly comprises a second shell, a valve core, a first sealing ring and a limiting seat, the valve core is positioned in a second accommodating cavity of the second shell, and the first sealing ring and the limiting seat are both positioned in a second communication port of the second shell, so that the fluid control assembly can be assembled into a whole.

Drawings

FIG. 1 is a schematic illustration of an exploded view of a fluid control device according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a fluid control assembly according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a partial structure of the fluid control device shown in FIG. 1;

FIG. 4 is a schematic structural view of a spacing block according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the spacing block provided in FIG. 4;

fig. 6 is a schematic structural view of a second housing provided in the first embodiment of the present invention;

FIG. 7 is a cross-sectional schematic view of the second housing shown in FIG. 6;

fig. 8 is a schematic structural view of a valve cartridge according to a first embodiment of the present invention;

FIG. 9 is a schematic structural view of a top cover provided in accordance with an embodiment of the present invention;

fig. 10 is a schematic structural view of a first housing provided in the first embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a portion of a fluid control device according to a second embodiment of the present invention;

FIG. 12 is a schematic sectional view showing a partial structure of a fluid control device according to a third embodiment of the present invention;

FIG. 13 is a schematic illustration of an exploded configuration of a fluid control assembly of the fluid control device shown in FIG. 12;

fig. 14 is a schematic flow chart illustrating a method for manufacturing a fluid control device according to an embodiment of the present invention.

Detailed Description

Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. Herein, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

As shown in fig. 1-3, an embodiment of the present invention provides a fluid control device 1, including a first housing 10 and a fluid control assembly 20, where the first housing 10 has a first accommodating cavity 15, at least a portion of the fluid control assembly 20 is located in the first accommodating 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 accommodating cavity 217, at least a portion of the valve core 22 is located in the second accommodating cavity 217, and the valve core 22 can rotate under actuation, and in some embodiments, the fluid control device 1 further includes a control device 60, and the valve core 22 can rotate under actuation of a driving member in the control device 60, such as a motor or a motor and a reduction gear set, and by controlling rotation of the valve core 22, a communicating cavity of the valve core 22 can communicate with a communicating port on the fluid control device 1, so as to control fluid of the fluid control device 1.

Wherein, the first housing 10 includes a first sidewall 11 and at least two connection pipes, at least a portion of the connection pipes is located outside the first accommodating 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 hermetically disposed to prevent fluid from leaking between the first sidewall 11 and the second sidewall 211. The first casing 10 further has at least two passages 13, the passages 13 extend through the connecting pipe, and the passages 13 form a first communicating opening 131 through the first side wall 11, the second casing 21 has at least two second communicating openings 212 extending through the second side wall 211, the second communicating openings 212 communicate with the second accommodating chamber 217, and the first communicating opening 131 of the first casing 10 communicates with the second accommodating chamber 217 through the second communicating openings 212.

In order to realize the sealing of the fluid control device 1, with reference to fig. 1 to 5, the number of the sealing assemblies 23 of the fluid control device 1 is equal to the number of the second communication ports 212 and the number of the first communication ports 131, in some embodiments, the sealing assembly 23 is located at the second communication port 212, the sealing assembly 23 includes a first sealing ring 231 and a limiting seat 232, the limiting seat 232 has a communication hole 2324, the second accommodating chamber 217 is communicated 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 from the surface of the valve element 22 facing the second side wall 211, the first sealing ring 231 is mounted at 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 a part of the outer surface of the limiting seat 232, and the first sealing ring 231 is sealed with the valve element 22. With the above arrangement, the valve core 22, the sealing assembly 23 and other structures can be assembled to the second housing 21, so that the fluid control assembly 20 can be assembled into 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 integrally installed in the first accommodating cavity 15 of the first housing 10, and compared with the case that the flow port of the fluid control assembly 20 is communicated with other components in the thermal management system through a pipeline, the fluid control device 1 according to the embodiment of the present invention can omit the pipeline between the fluid control assembly 20 and other components in the thermal management system, and can improve the integration level of the fluid control device 1. Meanwhile, the sealing assembly 23 is sleeved in the second communication port 212 of the second housing 21, so that the first sealing ring 231 is also sleeved in the second communication port 212, and compared with a sealing member configured as an annular structure surrounding the valve core 22, a contact area between the first sealing ring 231 and the valve core 22 in the fluid control device 1 according to the embodiment of the present invention is small, and a driving force required by the valve core 22 during rotation can be relatively reduced.

As shown in fig. 1 and 3, to achieve the sealing between the first sidewall 11 and the second sidewall 211, in some embodiments, the fluid control device further includes a first sealing member 30, at least a portion of the first sealing member 30 is sandwiched between the first sidewall 11 and the second sidewall 211, and at this time, the first sealing member 30 is pressed and deformed by the first sidewall 11 and the second sidewall 211, so that the first sealing member 30 and the first sidewall 11 and the second sidewall 211 form a sealing surface therebetween to achieve the sealing. Further, in some embodiments, the first sealing ring 231 is sleeved on the outer periphery of the position-limiting seat 232 and clamped between the valve element 22 and the position-limiting seat 232, and the first sealing ring 231 is deformed by the extrusion between the valve element 22 and the position-limiting seat 232, so as to achieve a sealing effect. In a specific implementation, a cross section of the first sealing ring 231 along a direction perpendicular to the axial direction of the first sealing ring 231 may be a circular ring shape, and the first sealing ring 231 in this case is an O-ring.

Based on this, as shown in fig. 3 to 5, in some embodiments, the limiting seat 232 has a communication hole 2324, the communication hole 2324 is communicated with the first communication hole 131, in order to achieve the pressing effect of the valve element 22 and the limiting seat 232 on the first sealing ring 231, the limiting seat 232 includes, along the thickness direction of the limiting seat 232, a first limiting portion 2321, a step portion 2322 and a second limiting portion 2323, the step portion 2322 is located between the first limiting portion 2321 and the second limiting portion 2323, and is projected to the step portion 2322 along the thickness direction of the limiting seat 232, at least a part of an orthographic projection of the first limiting portion 2321 and at least a part of an orthographic projection of the second limiting portion 2323 are both located inside the orthographic projection of the step portion 2322, the first sealing ring 231 is sleeved on an outer peripheral side of the first limiting portion 2321 and is sandwiched between the valve element 22 and the step portion 2322, the first sealing element 30 includes two mutually sleeved portions, which are a first sub-portion and a second sub-portion, the first sub-portion is respectively, the first sub-portion is sleeved on an outer peripheral side of the second sub-portion, the second sub-portion is sleeved on an outer peripheral side of the second sub-portion 2323, and a height of the second side wall is sandwiched between the first side wall 11 and the second side wall of the second sub-portion 11. With the above arrangement, the first sealing member 30 can achieve not only the sealing of the first side wall 11 and the second side wall 211 at the communication port position, but also the sealing of the first side wall 11 and the stopper seat 232 at the communication port position.

To achieve clamping of the first sealing member 30, the first casing 10 may further have a first groove recessed from the inner side surface of the first side wall 11 toward the inside of the first side wall 11, at least a portion of the first sealing member 30 is located in the first groove, and the depth of the first groove is smaller than the thickness of the first sealing member 30, so that when the fluid control assembly 20 is assembled to the first accommodating cavity 15 of the first casing 10, the second side wall 211 of the second casing 21 and the first side wall 11 of the first casing 10 can clamp and press the first sealing member 30, thereby achieving sealing between the first side wall 11 and the second side wall 211. Or as shown in fig. 3, 6 and 7, the second housing 21 has a second groove 218, the second groove 218 is recessed from the outer side surface of the second side wall 211 toward the inside of the second side wall 211, at least a portion of the first sealing member 30 is located in the second groove 218, and the depth of the second groove 218 is smaller than the thickness of the first sealing member 30; or the first casing 10 may have a first groove recessed from the inner side surface of the first sidewall 11 toward the inside of the first sidewall 11, the second casing 21 has a second groove 218, the second groove 218 is recessed from the outer side surface of the second sidewall 211 toward the inside of the second sidewall 211, the first groove and the second groove 218 are communicated and form a receiving space, at least a portion of the first sub-portion 31 is located in the receiving space, and a distance of the receiving space in the thickness direction of the first sealing member 30 is smaller than the thickness of the first sealing member 30, which is not limited by the present invention.

When the fluid control device 1 has the first sealing member 30, the first sealing member 30 and the fluid control assembly 20 may be assembled first during assembly, and then the first sealing member 30 and the fluid control assembly 20 are integrally installed in the first accommodating cavity 15 of the first housing 10, in order to prevent the first sealing member 30 and the fluid control assembly 20 from generating transmission at the position when the first sealing member 30 and the fluid control assembly 20 are installed in the first accommodating cavity 15, in some embodiments, the first housing 10 further includes a first rib protruding from the first side wall 11, the first rib extends along the height direction of the first housing 10, optionally, the first rib may be a strip-shaped rib, the length direction of the strip-shaped rib is parallel to the height direction of the first housing 10, the first sealing member 30 includes a first limiting groove, the first limiting groove is recessed from the outer surface of the first sealing member 30 to the inside of the first sealing member 30, and the first rib is embedded in the first limiting groove; or, the first sealing element 30 includes a main body portion and a second protruding rib, the second protruding rib protrudes from the main body portion 33 and extends along the height direction of the main body portion, optionally, the second protruding rib may be a strip protruding rib, the length direction of the strip protruding rib is parallel to the height direction of the first sealing element 30, the first side wall 11 includes a second limiting groove, the second limiting groove is recessed from the inner surface of the first side wall 11 to the inside of the first side wall 11, and the second protruding rib is embedded into the second limiting groove. The rib is embedded into the limit groove, so that the limit between the first sealing element 30 and the first shell 10 is realized, and the first sealing element 30 is prevented from moving.

Referring to fig. 3 and 8, in some embodiments, the main body of the valve core 22 is a cylindrical structure, the second housing 21 further 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 hermetically disposed with the second side wall 211, the valve core 22 has a third groove 222 and a conducting cavity 221, along the height direction of the fluid control device 1, the conducting cavity 221 is located between the third groove 222 and the second bottom wall 213, the third groove 222 and the conducting cavity 221 are both recessed from the outer circumferential surface of the valve core 22 toward the inside of the valve core 22, the rotary valve core 22 can enable the conducting cavity 221 to conduct the corresponding two second communication ports 212, the fluid control assembly 20 further includes a second sealing ring 25, the second sealing ring 25 is located in the third groove 222 and is sandwiched between the valve core 22 and the second housing 21, the second sealing ring 25 is hermetically disposed between the valve core 22 and the second side wall 211, and the longitudinal section of the second sealing ring 25 may be an O-type sealing ring. Through the arrangement, the fluid control assembly and the fluid control device have good sealing performance.

In some embodiments, the valve core 22 has a conducting cavity 221, the conducting cavity 221 is recessed from the outer peripheral surface of the valve core 22 to the inside of the valve core 22, and the valve core 22 rotates to enable the conducting cavity 221 of the valve core 22 to conduct the two corresponding communication ports, and the cross-sectional area of the opening of the conducting cavity 221 is smaller than the cross-sectional area of the outer peripheral surface of the first limit portion 2321 of the limit seat 232, so that the valve core 22 can define the installation position of the limit seat 232, and a gap is formed between the surface of the first limit portion 2321 of the limit seat 232 facing the valve core 22 and the valve core 22. With the above arrangement, the acting force of the stopper seat 232 on the valve body 22 during rotation of the valve body 22 can be reduced, the stability of rotation of the valve body 22 can be improved, and the driving torque can be reduced.

As shown in fig. 3 and 7 to 10, 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 enclose a first accommodating cavity 15, the second housing 21 further includes a second bottom wall 213, the second bottom wall 213 and the second side wall 211 enclose a second accommodating 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, a gap is provided between at least a portion of the outer surface of the valve core 22 and the outer surface of the second housing 21 to reduce resistance to rotation of the valve core 22, the fluid control device 1 further includes a top cover 40, the fluid control assembly 20 is disposed between the top cover 40 and the first bottom wall 12, the top cover 40 is fixedly connected to the first housing 10 through a fastener, the top cover 40 has a top wall 42 and a first protruding portion 41 protruding from the top wall, the first protruding portion 41 is disposed in the second accommodating cavity 217, the second housing 21 further includes a second bottom wall 213 and a second boss 214 protruding from the second bottom wall 213, one of the first boss 41 and the second boss 214 is in contact with the spool 22, a height of the spool 22 between the first boss 41 and the second boss 214 is smaller than a spacing distance between the first boss 41 and the second boss 214, a height of the spool 22 between the first boss 41 and the second boss 214 is defined as a first distance, a spacing distance between the first boss 41 and the second boss 214 is defined as a second distance, values of the first distance and the second distance may be set according to a user's requirement, for example, the first distance may be smaller than the second distance by 0.2mm, by providing the first boss 41 and the second boss 214, a position of the spool 22 in a height direction of the fluid control apparatus 1 can be defined, and by providing the first distance to be smaller than the second distance, preventing the spool 22 from jamming during rotation.

As shown in fig. 3, 6 and 10, in some embodiments, one of the first and second housings 10 and 21 includes a convex structure and the other includes a concave structure, and the convex structure is embedded in the concave structure to limit the first and second bottom walls 12 and 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 disposed with the inner surface of the first housing 10. In a specific implementation, as shown in fig. 10, a concave structure 17 may be provided on the first casing 10, the concave structure 17 extends from the inner surface of the first bottom wall 12 to the inside of the first bottom wall 12, a convex structure 216 is provided on the second casing 21, the convex structure 216 extends from the outer surface of the second bottom wall 213 to a direction away from the second accommodating cavity 217, and the convex structure 216 is embedded inside the concave structure 17 to define the position between the second casing 21 and the first casing 10.

As shown in fig. 11 to 13, fig. 11 is a schematic partial sectional structure view of a fluid control device according to a second embodiment of the present invention, fig. 12 is a schematic partial sectional structure view of a fluid control device according to a third embodiment of the present invention, fig. 13 is a schematic exploded structure view of a fluid control assembly according to a third embodiment of the present invention, and the fluid control devices according to the second and third embodiments are similar to the first fluid control device in structure, except that the inner surface of the first housing 10 is of a tapered structure, the radial dimension of the inner surface of the first housing 10 decreases in a direction toward the first bottom wall 12 in a height direction of the control valve, the outer surface of the second housing 21 is of a tapered structure, the radial dimension of the outer surface of the second housing 21 decreases in a direction toward the first bottom wall 12, the inner surface of the second housing 21 is of a tapered structure, the radial dimension of the inner surface of the valve spool 22 decreases in a direction toward the first bottom wall 12, and the radial dimension of the outer surface of the valve spool 22 decreases in a direction toward the first bottom wall 12. With the above arrangement, it is possible to facilitate the fitting of the spool 22 into the second accommodation chamber 217 and also facilitate the fitting of the fluid control assembly 20 into the first accommodation chamber 15.

As shown in fig. 12 and 13, compared to the fluid control devices provided in the first and second embodiments, the first sealing member 30 can be omitted, in this embodiment, the thickness of the first sealing ring 231 is equal to or greater than the thickness of the stopper seat 232, the first sealing ring 231 passes through the second communication port and is interposed between the valve body 22 and the first side wall 11 along the thickness direction of the first sealing ring 231, a sealing surface is formed between one end of the first sealing ring 231 and the valve body 22, a sealing surface is formed between the other end of the first sealing ring 231 and the first side wall 11, and the first sealing ring 231 is pressed between the stopper 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.

In summary, according to the fluid control apparatus 1 provided by the embodiment of the present invention, the fluid control apparatus 1 includes the first housing 10 and the fluid control assembly 20, the fluid control assembly 20 is located in the first accommodating chamber 15 of the first housing 10, the fluid control assembly 20 includes the second housing 21, the valve core 11, the first sealing ring 231 and the retainer 232, the valve core 22 is located in the second accommodating chamber 217 of the second housing 21, and both the first sealing ring 231 and the retainer 232 are 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 structure formed by other components of the thermal management system, the fluid control assembly 20 can be integrally installed in the first accommodating chamber 15 of the first housing 10 and the second communication port 212 is communicated with the first communication port 131, compared with the case that the communication port of the fluid control assembly 20 is communicated with other components in the thermal management system through a pipeline, the fluid control apparatus 1 of the embodiment of the present invention can omit the pipeline between the fluid control assembly 20 and other components in the thermal management system, can improve the pipeline, reduce the integration degree of the fluid control apparatus 1, and facilitate popularization of the fluid control apparatus 1, and the application of the fluid control apparatus.

As shown in fig. 14, a method for manufacturing a fluid control device according to an embodiment of the present invention is provided, and with reference to fig. 1 to 13, the method for manufacturing a fluid control device according to an embodiment of the present invention includes:

and S110, providing the first shell 10.

The first housing 10 has a first receiving chamber 15 and at least two passages 13, the first housing 10 includes a first sidewall 11, and the passages 13 form a first communication port 131 through the first sidewall 11.

And S120, forming the fluid control assembly 20.

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, wherein the second housing 21 has a second accommodating chamber 217 and at least two second communication ports 212, the second housing 21 includes a second side wall 211, the second communication ports 212 penetrate through the second side wall 211 and are communicated with the second accommodating chamber 217, and the limiting seat 232 has a communication hole 2324; placing the spool 22 in the second accommodation chamber 217; the first seal ring 231 is sleeved on the outer peripheral side of the stopper seat 232 to form the seal assembly 23, the seal assembly 23 is placed in the second communication hole 212 so that the communication hole 2324 communicates with the second accommodating chamber 217, and the stopper seat 232 and the valve element 22 are positioned toward the surface of the second side wall 211, where the fluid control assembly 20 is an integral structure.

S130, the fluid control assembly 20 is placed in the first receiving chamber 15, and the first communication port 131 is aligned and communicated with the second communication port 212.

According to the method for manufacturing a fluid control apparatus according to the embodiment of the present invention, the fluid control unit 20 can be assembled into a stable integral structure and can be accommodated in the first accommodation chamber 15 of the first housing 10, so that the piping between the fluid control unit 20 and other components in the thermal management system can be omitted, and the degree of integration of the fluid control apparatus 1 can be improved.

When the fluid control device 1 further includes the first sealing member 30, the first sealing member 30 and the sealing assembly 23 may be assembled first, and then the first sealing member 30 and the sealing assembly 23 are integrally sleeved in the second communication port 212. When the fluid control assembly 20 further includes the second sealing ring 25, the second sealing ring 25 may be firstly sleeved in the third groove 222 of the valve core 22, and then the second sealing ring 25 and the valve core 22 are integrally sleeved in the first accommodating cavity 15 of the first housing 10.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the modifications, combinations, or equivalents of the present invention can be made by those skilled in the art, and all the technical solutions and modifications which do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (10)

1. A fluid control device comprising a first housing having a first receiving chamber and a fluid control assembly at least a portion of which is located in the first receiving chamber, the fluid control assembly comprising a second housing having a second receiving chamber and a spool at least a portion of which is located in the second receiving chamber, the spool being rotatable under actuation;

the first shell comprises a first side wall, the second shell comprises a second side wall, the first side wall and the second side wall are arranged in a sealing mode, the first shell is provided with at least two first communication ports penetrating through the first side wall, the second shell is provided with at least two second communication ports penetrating through the second side wall, the second communication ports are communicated with the second accommodating cavity, and the first communication ports are communicated with the second communication ports;

the fluid control assembly further comprises a first sealing ring and a limiting seat, the limiting seat is provided with a communicating hole, the second accommodating cavity is communicated with the first communicating hole through the communicating hole, the limiting seat is located in the second communicating hole and faces the surface of the second side wall in a limiting mode, the first sealing ring is sleeved on the wall surface of the second communicating hole and at least part of the outer surface of the limiting seat, and the first sealing ring and the valve core are arranged in a sealing mode.

2. The fluid control device according to claim 1, wherein the stopper seat includes a first stopper portion, a stepped portion, and a second stopper portion in a thickness direction of the stopper seat, the stepped portion being located between the first stopper portion and the second stopper portion,

the projection is formed on the stepped part along the thickness direction of the limiting seat, at least part of the orthographic projection of the first limiting part and at least part of the orthographic projection of the second limiting part are both positioned in the stepped part, the first sealing ring is sleeved on the outer periphery of the first limiting part and is clamped between the valve core and the stepped part,

the fluid control device further comprises a first sealing element, the first sealing element comprises a first sub-portion and a second sub-portion, the second sub-portion is sleeved on the outer peripheral side of the second limiting portion, the first sub-portion is sleeved on the outer peripheral side of the second sub-portion, the first sub-portion is clamped between the first side wall and the second side wall along the height direction perpendicular to the fluid control device, and part of the second sub-portion is clamped between the step portion and the first side wall.

3. The fluid control device according to claim 2, wherein the first housing has a first groove recessed from an inside surface of the first sidewall toward the first sidewall, at least a portion of the first seal being located in the first groove, the first groove having a depth less than a thickness of the first seal;

or the second shell is provided with a second groove which is sunken from the outer side surface of the second side wall to the inside of the second side wall, at least part of the first sealing element is positioned in the second groove, and the depth of the second groove is smaller than the thickness of the first sealing element;

or, the first casing has a first groove, the first groove is sunken from the inner side surface of the first side wall to the inside of the first side wall, the second casing has a second groove, the second groove is sunken from the outer side surface of the second side wall to the inside of the second side wall, the first groove and the second groove are communicated and form an accommodating space, at least part of the first sealing element is located in the accommodating space, and the distance of the accommodating space in the thickness direction of the first sealing element is smaller than the thickness of the first sealing element.

4. The fluid control device according to claim 1, wherein a thickness of the first seal ring is equal to or greater than a thickness of the stopper seat, the first seal ring passes through the second communication port and is interposed between the valve element and the first side wall in a thickness direction of the first seal ring, a seal surface is formed between one end of the first seal ring and the valve element, and a seal surface is formed between the other end of the first seal ring and the first side wall.

5. The fluid control device according to any one of claims 1 to 4, wherein the first housing further comprises a first bottom wall, the first bottom wall and the first side wall defining the first accommodation chamber, the second housing further comprises a second bottom wall, the second bottom wall and the second side wall defining the second accommodation chamber, the second bottom wall being disposed adjacent to the first bottom wall, one of the first housing and the second housing comprising a convex structure, the other comprising a concave structure, the convex structure being embedded within the concave structure to confine the first bottom wall and the second bottom wall,

the second housing is disposed coaxially with the first housing.

6. The fluid control device according to claim 5, wherein the valve body has a cylindrical structure, the second bottom wall and the second side wall are integrally formed or hermetically disposed, the valve body has a third groove and a communication cavity, the communication cavity is located between the third groove and the second bottom wall along a height direction of the fluid control device, the third groove and the communication cavity are both recessed from an outer peripheral surface of the valve body to an inside of the valve body, and rotating the valve body can cause the communication cavity to communicate with the corresponding two second communication ports,

the fluid control assembly further comprises a second sealing ring, the second sealing ring is located in the third groove and clamped between the valve core and the second side wall, and the second sealing ring is hermetically arranged between the valve core and the second side wall respectively.

7. The fluid control device according to claim 5, wherein the body of the spool has a columnar structure, and a gap is provided between at least a part of an outer surface of the spool and an inner surface of the second housing,

the fluid control device further comprises a top cover, the fluid control assembly is located between the top cover and the first bottom wall, the top cover is fixedly connected with the first shell through a fastener, the top cover is abutted to the second shell, the top cover is provided with a top wall and a first protruding portion protruding out of the top wall, the first protruding portion is located in the second accommodating cavity, the second shell further comprises a second protruding portion protruding out of the second bottom wall, the second protruding portion is located in the second accommodating cavity, one of the first protruding portion and the second protruding portion is in contact with the valve element, and the height of the valve element located between the first protruding portion and the second protruding portion is smaller than the spacing distance between the first protruding portion and the second protruding portion.

8. The fluid control device according to any one of claims 1 to 4, wherein the first casing further comprises a first rib protruding from the first side wall, the first rib extending in a height direction of the first casing, the first sealing member comprises a first stopper groove recessed from an outer surface of the first sealing member toward an inside of the first sealing member, and the first rib is fitted into the first stopper groove;

or, the first sealing element comprises a main body part and a second convex rib, the second convex rib protrudes out of the main body part, the first side wall comprises a second limiting groove, the second limiting groove is sunken from the inner surface of the first side wall to the inside of the first side wall, and the second convex rib is embedded into the second limiting groove.

9. The fluid control device according to any one of claims 1 to 4, wherein the first housing further comprises a first bottom wall, and 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 body are all of a tapered structure,

along the height direction of the control valve and the direction pointing to the first bottom wall, the radial size of the inner surface of the first shell decreases progressively, the radial size of the outer surface of the second shell decreases progressively, the radial size of the inner surface of the second shell decreases progressively, and the radial size of the outer surface of the valve core decreases progressively.

10. A method of manufacturing a fluid control device, comprising:

providing a first shell, wherein the first shell comprises a first side wall and is provided with at least two first communication ports penetrating through the first side wall, and the first shell is provided with a first accommodating cavity;

forming a fluid control assembly comprising:

providing a second shell, a valve core, a first sealing ring and a limiting seat, wherein the second shell is provided with a second accommodating cavity and at least two second communication ports, the second shell comprises a second side wall, the second communication ports penetrate through the second side wall and are communicated with the second accommodating cavity, and the limiting seat is provided with a communication hole;

placing the valve core in the second accommodating cavity;

sleeving the first sealing ring on the outer peripheral side of the limiting seat to form a sealing assembly;

placing the sealing assembly in the second communication hole to enable the communication hole to be communicated with the second accommodating cavity, and limiting the limiting seat and the surface, facing the second side wall, of the valve core;

placing the fluid control assembly in the first receiving cavity and placing the first communication port in aligned communication with the second communication port.

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