A fluid control assembly

Abstract

This utility model discloses a fluid control component, including a flow channel component and a connecting component. The flow channel component and the connecting component are fixedly connected or limitedly connected. The connecting component includes a check valve and a pipe fitting. The pipe fitting has a hollow structure, and the check valve is located inside the pipe fitting. The flow channel component has an inlet flow channel, and the pipe fitting has a first port and a second port. The first port is farther away from the flow channel component than the second port. The first port communicates with the outside, and the second port communicates with the inlet flow channel. The check valve can move along the axial direction of the pipe fitting to connect the first port and the second port. In this utility model, the pipe fitting has openings at both ends, which is conducive to connecting with external interfaces and avoids processing additional interface structures on the flow channel component. This reduces the size of the flow channel component and lowers the cost to a certain extent. It also makes the integration of the flow channel component and the connecting component more compact and is conducive to the miniaturization of the fluid control component.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, such as thermal management technology for automotive, commercial, residential or energy storage applications, and in particular to a fluid control component. Background Technology

[0002] In a thermal management system, the thermal management integrated module includes a flow channel assembly and a check valve. The check valve is connected to the flow channel assembly to prevent fluid backflow. In related technologies, the check valve adopts an insertion-type L-shaped structure, with fluid entering from one end of the check valve and flowing out from the side end. When the flow channel assembly is connected to the piping of external thermal management components, a bypass outlet needs to be added to the flow channel plate, which increases the volume of the flow channel assembly and makes the structure of the flow channel plate more complex. At the same time, the thermal management integrated module has a low degree of integration, which increases manufacturing costs. Utility Model Content

[0003] The purpose of this application is to provide a fluid control component that simplifies the structure of the flow channel component and the external interface, reduces the volume of the flow channel component, thereby reducing the cost, and further facilitates a more compact integration of the check valve and the flow channel component.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A fluid control component, characterized in that it comprises a flow channel assembly and a connecting assembly, wherein the flow channel assembly is fixedly connected or limit-connected to the connecting assembly, the connecting assembly includes a check valve and a pipe fitting, the pipe fitting is a hollow structure, the check valve is located inside the pipe fitting, the flow channel assembly has an inlet flow channel, the pipe fitting has a first port and a second port, the first port is located away from the flow channel assembly relative to the second port, the first port communicates with the outside, the second port communicates with the inlet flow channel, and the check valve is axially movable along the pipe fitting to connect the first port and the second port.

[0006] This application provides a fluid control component in which a flow channel assembly is fixedly or limitedly connected to a connecting assembly. The pipe fitting has a hollow structure, and a check valve is located inside the pipe fitting. The flow channel assembly has an inlet flow channel, a first port communicating with the outside, and a second port communicating with the inlet flow channel. The check valve can move along the axial direction of the pipe fitting to connect the first port and the second port. In this application, the pipe fitting has openings at both ends, which is beneficial for connecting to external interfaces and avoids processing additional interface structures on the flow channel assembly. This reduces the size of the flow channel assembly, thereby reducing costs to a certain extent. It also facilitates a more compact integration of the flow channel assembly and the connecting assembly, which is beneficial for the miniaturization of the fluid control component. Attached Figure Description

[0007] Figure 1A three-dimensional structural schematic diagram of a fluid control component provided in this application;

[0008] Figure 2 for Figure 1 A front view structural schematic diagram of a fluid control component is shown;

[0009] Figure 3 for Figure 2 The diagram shows a cross-sectional view of a fluid control component along plane AA (with the valve port closed).

[0010] Figure 4 for Figure 2 The diagram shows a cross-sectional view of a fluid control component along the BB plane (with the valve port closed).

[0011] Figure 5 for Figure 4 A partial cross-sectional view of a fluid control component is shown.

[0012] Figure 6 for Figure 4 The diagram shows a partial cross-sectional view of a fluid control component.

[0013] Figure 7 for Figure 2 The diagram shows a cross-sectional view of a fluid control component along the BB plane (with the valve port open).

[0014] Figure 8 for Figure 4 A front view of the connecting components shown.

[0015] Figure 9 for Figure 8 The diagram shows a cross-sectional view of the connecting component along the CC plane.

[0016] Figure 10 for Figure 4 A three-dimensional structural schematic diagram of the flow channel assembly shown;

[0017] Figure 11 for Figure 8 A front view schematic diagram of the flow channel assembly shown;

[0018] Figure 12 for Figure 11 The diagram shows a cross-sectional view of the flow channel assembly along the DD plane.

[0019] Figure 13 for Figure 2 A schematic diagram of the three-dimensional structure of the elastic element shown;

[0020] Figure 14 for Figure 8 The diagram shows a front view of the pipe fitting.

[0021] Figure 15 for Figure 14 The diagram shows a cross-sectional view of the pipe fitting along the EE plane.

[0022] Figure 16 for Figure 14 A top view of the pipe fitting shown;

[0023] Figure 17 for Figure 8 The diagram shows a three-dimensional structure of the check valve.

[0024] Figure 18 for Figure 17 The diagram shows a front view of the check valve.

[0025] Figure 19 for Figure 18 The diagram shows a cross-sectional view of the check valve along the EE plane.

[0026] Figure label:

[0027] 100. Fluid control assembly; 1. Flow channel assembly; 101. Inlet flow channel; 102. Second slot; 11. Second step; 12. First guide; 13. Second guide; 2. Connecting assembly; 201. First port; 202. Second port; 203. Valve port; 204. First sealing part; 204a. Groove; 21. Check valve; 211. Sealing element; 212. Guide rod; 212a. Large diameter part; 212b. Small diameter part; 213. Elastic element; 214. Fixing block; 214a. 214b, through hole; 22, limiting groove; 22, pipe fitting; 220, mounting cavity; 221, first part; 221a, second through hole; 222, second part; 222a, first slot; 222b, opening; 223, first sidewall; 224, second sidewall; 225, first step part; 226, limiting part; 226a, first through hole; 227, support part; 228, guide part; 3, snap-fit ​​part; 31, elastic main body part; 32, hook part; 4, first seal; 5, second seal. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0029] This application provides a fluid control component 100, which can be applied to a thermal management system, and the thermal management system can be used in household air conditioners, automotive air conditioners, energy storage systems, etc.

[0030] like Figures 1-19 As shown, this application provides a fluid control component 100, including a flow channel component 1, a connecting component 2, a snap-fit ​​component 3, and a first seal 4. The first seal 4 is located between the flow channel component 1 and the connecting component 2 to ensure the sealing between the flow channel component 1 and the connecting component 2 and prevent fluid leakage. In this application, the first seal 4 is an O-ring, which is a standard part, facilitating replacement and maintenance, and to some extent saving costs. Of course, in other cases, the first seal 4 can also be in the form of a rectangular sealing ring, a sealing gasket, etc. The flow channel component 1 and the connecting component 2 are fixedly connected or limited to each other, for example, by welding, bonding, fasteners, and snap-fit ​​limiting. In this application, the flow channel component 1 and the connecting component 2 are fixed by the snap-fit ​​component 3. Using the snap-fit ​​component 3 for fixing facilitates installation and disassembly, and compared with screw or pin connections, there is no need to reserve space for threaded holes or drilling, resulting in a smaller space occupation and, to some extent, a more compact structure. The connecting assembly 2 includes a check valve 21 and a pipe fitting 22. The pipe fitting 22 has a hollow structure, and the check valve 21 is located inside the pipe fitting 22. The flow channel assembly 1 has an inlet flow channel 101, the outer wall of which protrudes from the flow channel assembly 1. The pipe fitting 22 has a first port 201 and a second port 202. Along the thickness direction of the flow channel assembly 1, the first port 201 is farther away from the flow channel assembly 1 than the second port 202. The first port 201 communicates with the outside, and the second port 202 communicates with the inlet flow channel 101. The check valve 21 can move axially along the pipe fitting 22 to connect the first port 201 and the second port 202. The first port 201 communicates with the outside, which is beneficial for interface connection with external thermal management components, such as compressors and liquid receivers. This eliminates the need for additional interface processing in the flow channel assembly 1, simplifies the structure of the flow channel assembly 1, and facilitates easier interface connection with other thermal management components. The pipe fitting 22 has openings at both ends, which facilitates connection with external interfaces and avoids the need to process additional interface structures on the flow channel assembly 1. This reduces the size of the flow channel assembly 1 and lowers the cost to some extent. It also makes the integrated structure of the flow channel assembly 1 and the connecting assembly 2 more compact, which is conducive to the miniaturization of the fluid control assembly 100. At the same time, the check valve 21 is integrated inside the pipe fitting 22, and the pipe fitting 22 is then connected to the flow channel assembly 1. This saves the additional valve body installation space and facilitates the later maintenance of the check valve 21, further reducing costs to some extent.

[0031] A first plane is defined, perpendicular to the thickness direction of the flow channel assembly 1. Along the thickness direction of the flow channel assembly 1, the projection of the wall forming the first opening 201 onto the first plane at least partially coincides with the projection of the wall forming the opening of the inlet flow channel 101 onto the first plane. This indicates that the flow channel between the pipe fitting 22 and the flow channel assembly 1 is a straight, through-flow channel, achieving a straight flow path and reducing pressure loss at bends. The check valve 21 allows fluid to flow in only one direction and automatically closes to block reverse flow. Therefore, in this application, when the check valve 21 is open, the fluid flows from the first opening 201 through the second opening 202 and finally into the interior of the inlet flow channel 101. This indicates that the wall forming the first opening 201 and the wall forming the inlet flow channel 101 are at least partially parallel. The straight-through flow channel design helps reduce flow resistance pressure. In this application, along the thickness direction of the flow channel assembly 1, the first opening 201 is coaxially arranged with the inlet flow channel 101, indicating that the first opening 201 and the inlet flow channel 101 are connected to form a straight channel. The straight channel maintains a stable flow direction, and the pressure gradient in the straight channel is more stable, avoiding local high pressure or low pressure areas caused by sudden turns, which helps to reduce flow resistance pressure. Of course, in some other embodiments, the openings of the first opening 201 and the inlet flow channel 101 are set at an angle, indicating that the first opening 201 and the inlet flow channel 101 are connected to form a curved channel. The curved channel can flexibly bypass obstacles, which is beneficial to improving space utilization to a certain extent.

[0032] like Figures 3-9 and Figures 14-16 As shown, the pipe fitting 22 includes a first part 221 and a second part 222. The first part 221 is located away from the flow channel assembly 1 relative to the second part 222. The first part 221 and the second part 222 are an integral structure, that is, the first part 221 and the second part 222 are integrally injection molded. The integral injection molding has no seams or connection points, which helps to strengthen the strength of the pipe fitting 22 and improve the overall durability of the pipe fitting 22. Alternatively, the first part 221 and the second part 222 can be fixedly connected or limited, for example, by welding, bonding, fasteners, or snap-fit ​​limiting. The separate structure helps to improve the utilization rate of parts, facilitates the replacement of parts in the future, and further facilitates the maintenance. At the same time, disassembling the parts also helps to reduce the processing difficulty of individual parts, which further reduces the processing cost to a certain extent. The first part 221 is limitedly connected to the check valve 21. The check valve 21 can move along the axial direction of the check valve 21 under the restriction of the first part 221. In this application, the axial direction of the check valve 21 is consistent with the thickness direction of the flow channel assembly 1. The second part 222 is sealed with the flow channel assembly 1.

[0033] The second part 222 has an installation cavity 220, and a second port 202 connects the installation cavity 220 and the inlet flow channel 101. At least a portion of the flow channel assembly 1 is located in the installation cavity 220, and the flow channel assembly 1 forms a wall seal with the portion of the installation cavity 220. This structural design facilitates the miniaturization of the inlet flow channel 101 of the flow channel assembly 1, simplifies the structure of the flow channel assembly 1, further reduces the molding difficulty of the flow channel assembly 1, and improves the feasibility of manufacturing. Of course, in some other embodiments, at least a portion of the pipe fitting 22 is located inside the inlet flow channel 101 of the flow channel assembly 1. This structure can also achieve a fixed connection or limiting connection between the pipe fitting 22 and the flow channel assembly 1, while adding a sealing element between the two to achieve flow channel communication between the connecting assembly 2 and the flow channel assembly 1. This is beneficial for reducing the structural size of the connecting assembly 2, further facilitating the miniaturization of the connecting assembly 2 structure, and making the structure of the connecting assembly 2 more compact. The peripheral wall dimension of the mounting cavity 220 is larger than that of the first port 201, indicating that when the check valve 21 is open, the fluid enters the mounting cavity 220, which has a larger circumferential dimension, through the relatively narrow first port 201. The increased flow cross-sectional area reduces the flow velocity, thereby reducing the direct impact of the fluid on the inlet channel 101 and improving the smoothness of the flow. The mounting cavity 220 also provides a certain space for flow expansion and is also conducive to forming a stable connection with the channel assembly 1.

[0034] The second part 222 includes a first sidewall 223 and a second sidewall 224. The second sidewall 224 is located away from the first part 221 relative to the first sidewall 223. The wall portion forming the mounting cavity 220 is located on the first sidewall 223 and partly on the first sidewall 224. Second sidewall 224, first sidewall A first step portion 225 is provided between 223 and the second sidewall 224.The first step portion 225 is positioned towards the flow channel assembly 1. The flow channel assembly 1 includes a second step portion 11, which is positioned opposite to the first step portion 225. It is assumed that there is a central plane between the first step portion 225 and the second step portion 11, and the horizontal projections of the first step portion 225 and the second step portion 11 on the central plane partially overlap. The flow channel assembly 1 includes a first guide portion 12 and a second guide portion 13. The second guide portion 13 is positioned away from the first guide portion 12 and away from the first part 221. The circumferential dimension of the first guide portion 12 is smaller than the circumferential dimension of the second guide portion 13. The second step portion 11 is located between the first guide portion 12 and the second guide portion 13. The first guide portion 12 is spaced apart from the first sidewall 223, and the second guide portion 13 is spaced apart from the second sidewall 224. The arrangement of the first guide portion 12 and the second guide portion 13 facilitates guidance during the assembly of the second part 222 with the flow channel assembly 1, ensuring the alignment of the flow channel assembly 1 with the second part 222 and preventing jamming. The first sealing element 4 is sleeved on the flow channel assembly 1, that is, the first sealing element 4 is sleeved on the outer peripheral wall of the first guide portion 12. The first sealing element 4 is located between the first step portion 225 and the second step portion 11, and the first sealing element 4 is in sealing contact with the second side wall 224. The first sealing element 4 is disposed between the first step portion 225 and the second step portion 11, which can limit the assembly distance between the connecting assembly 2 and the flow channel assembly 1. At the same time, the first step portion 225 and the second step portion 11 are equivalent to a groove, in which the first sealing element 4 is disposed, preventing the first sealing element 4 from falling off, and further ensuring the sealing performance between the flow channel assembly 1 and the connecting assembly 2. Of course, in other embodiments, a groove can also be provided on the flow channel assembly 1, and the first sealing element 4 can be assembled in the groove. This helps to prevent the first sealing element 4 from falling off or shifting when installing and disassembling the connecting assembly 2, further ensuring the sealing performance between the connecting assembly 2 and the flow channel assembly 1.

[0035] like Figures 4-9 and Figures 14-16As shown, the second part 222 has a first card slot 222a, which is disposed along the peripheral wall of the second part 222. The first card slot 222a is not disposed completely along the peripheral wall of the second part 222. In this application, there are two first card slots 222a, which are disposed to facilitate connection with the card connector 3. The first slot 222a has an opening 222b, which connects to the mounting cavity 220. The flow channel assembly 1 has a second slot 102. Along the thickness direction of the flow channel assembly 1, the second slot 102 is located away from the first step 225 relative to the second step 11. The second slot 102 opens towards the outer peripheral wall of the flow channel assembly 1. The first slot 222a and the second slot 102 are arranged opposite each other. Along the thickness direction of the flow channel assembly 1, it is assumed that there is a central surface between the first slot 222a and the second slot 102, which is perpendicular to the thickness direction of the flow channel assembly 1. The horizontal projections of the first slot 222a and the second slot 102 on the central surface partially overlap. The snap-fit ​​member 3 snaps into the first slot 222a and the second slot 102. The connection component 2 and the flow channel component 1 can be quickly installed and disassembled, reducing maintenance time and costs. At the same time, the snap-fit ​​component 3 is small in size, making it suitable for space-constrained scenarios, avoiding the occupation of additional structural space, which is conducive to the miniaturization of the overall structure. Compared with bolt fixing, the connection component 2 and the flow channel component 1 do not need to be reserved with threaded holes, which simplifies the processing of the components to a certain extent, thereby helping to reduce costs.

[0036] like Figures 1-5 and Figure 13 As shown, the snap-fit ​​component 3 includes an elastic body portion 31 and a hook portion 32. The elastic body portion 31 and the hook portion 32 are integrally formed. The elastic body portion 31 has a U-shaped structure, and the hook portion 32 is located at both ends of the elastic body portion 31. The hook portion 32 extends along the thickness direction of the flow channel assembly 1. Part of the elastic body portion 31 is sleeved on the peripheral wall of the partial second portion 222, and part is located in the first slot 222a and the second slot 102. The hook portion 32 snaps into the peripheral wall of the partial second portion 222. In this application, the snap-fit ​​component 3 is a U-shaped retaining spring made of metal. The U-shaped retaining spring has an opening, and both ends have hook portions extending along the thickness direction of the flow channel assembly. 32. The two ends of the U-shaped retaining ring engage with the flow channel assembly 1 and the second part 222, restricting the flow channel assembly 1 and the connecting group. The relative movement between components 2, and the provision of the hook portion 32, restricts the relative rotation between the flow channel assembly 1 and the connecting assembly 2. The hook portion 32 utilizes the tension generated by the elasticity of the metal to tightly adhere to the outer peripheral wall of the flow channel assembly 1 or the second part 222, ensuring the stability of the connection between the two. Of course, in other specific embodiments, the snap-fit ​​component 3 can also be a snap-fit ​​spring made of other rigid materials, and in terms of shape, it can also be a square snap-fit ​​spring, a regular polygonal snap-fit ​​spring, etc.

[0037] The pipe fitting 22 has a valve port 203, located in the first part 221, between the first port 201 and the second port 202. The check valve 21 can seal against the wall forming the valve port 203. The check valve 21 can open or close the valve port 203 under pressure. (Reference) Figures 2-6 As shown, the first part 221 includes a limiting part 226, which is connected to the wall forming a portion of the valve port 203. The limiting part 226 has a first through hole 226a, and the check valve 21 is limited in the first through hole 226a. The check valve 21 can slide along the wall forming the first through hole 226a. The check valve 21 includes a first sealing part 204, and the fluid control assembly 100 includes a second sealing member 5, which is sleeved on the first sealing part 204 and can seal against the wall forming the first port 201. The first sealing part 204 ensures that the fluid can flow in one direction and is blocked in the opposite direction, thus ensuring the stability of the operation of the fluid control assembly 100. The first sealing part 204 has a groove 204a, which opens toward the peripheral wall of the first sealing part 204. At least a portion of the second sealing member 5 is located in the groove 204a, and the second sealing member 5 seals against the wall forming the valve port 203. In this application, the second sealing element 5 is an O-ring. O-rings are standard parts, facilitating replacement and maintenance, and thus contributing to cost savings to some extent. Of course, in other cases, the second sealing element 5 can also be a rectangular sealing ring, a gasket, or other similar form.

[0038] Furthermore, the limiting part 226 includes a support part 227 and a guide part 228. A first through hole 226a is located in the guide part 228, and the guide part 228 restricts the movement direction of the check valve 21. The support part 227 and the guide part 228 are integral structures, that is, the support part 227 and the guide part 228 are integrally injection molded. The integral injection molding has no seams or connection points, which helps to strengthen the strength of the limiting part 226 and improve the overall durability of the limiting part 226. One end of the support part 227 is connected to the wall forming the valve port 203, and the other end is connected to the guide part 228. The first part 221 has a second through hole 221a, which is located between the support part 227 and the wall forming the valve port. In this application, the number of second through holes 221a is three. Of course, in other specific embodiments, the number of second through holes 221a can be determined according to the requirements.

[0039] like Figures 17-19As shown, the check valve 21 includes a plugging component 211, a guide rod 212, an elastic component 213, and a fixing block 214. The plugging component 211, guide rod 212, and fixing block 214 can be made of metal or plastic. In this application, the plugging component 211, guide rod 212, and fixing block 214 are made of plastic, which helps to reduce weight and cost. The first sealing part 204 is located on the plugging component 211. The plugging component 211 is farther away from the fixing block 214 than the elastic component 213. The plugging component 211 and the guide rod 212 are an integral structure. This integral structure increases the connection strength between the plugging component 211 and the guide rod 212, which helps to ensure the stability of the check valve 21. Of course, in other specific embodiments, the sealing component 211 is fixedly connected or limited to the guide rod 212, for example, by welding or threaded connection. The sealing component 211 and the guide rod 212 are connected separately. The separate structure simplifies the processing to a certain extent, reduces the processing difficulty of individual parts, and thus reduces the processing cost of individual parts. The guide rod 212 is limitedly connected to the guide part 228 through the first through hole 226a, that is, one end of the guide rod 212 passes through the first through hole 226a. The first through hole 226a restricts the movement direction of the guide rod 212, that is, the guide rod 212 can only move along the axial direction of the pipe fitting 22. The elastic element 213 is sleeved on the peripheral wall of the guide rod 212. One end of the elastic element 213 abuts against the end of the guide part 228. The fixing block 214 is fixedly connected or limited to the guide rod 212, for example, by threaded connection or snap-fit. The other end of the elastic element 213 abuts against the fixing block 214. The elastic element 213 refers to a component that has elastic deformation capability and can provide restoring force or buffering effect. In this application, the elastic element 213 refers to a spring.

[0040] Furthermore, the guide rod 212 includes a large-diameter portion 212a and a small-diameter portion 212b. The large-diameter portion 212a is farther away from the sealing member 211 relative to the small-diameter portion 212b. The fixing block 214 has a through hole 214a and a limiting groove 214b. The limiting groove 214b partially overlaps with the through hole 214a, and the limiting groove 214b opens in a direction away from the sealing member 211. The large-diameter portion 212a can pass through the through hole 214a, and the small-diameter portion... Part 212b can pass through the through hole. 214a, the shape of the large-diameter portion 212a is similar to that of the limiting groove 214b. The large-diameter portion 212a can be embedded in the limiting groove 214b, and the large-diameter portion 212a and the limiting groove 214b are connected in a limiting manner. Under the rebound pressure of the elastic member 224, the end of the large-diameter portion 212a abuts against the wall of the limiting groove 214b. The design of the fixing block 214 structure facilitates disassembly and is beneficial for the later maintenance of the check valve 21. At the same time, the setting of the limiting groove 214b facilitates quick positioning and makes it easy to assemble the fixing block 214 and the guide rod 212.

[0041] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the technical solution and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A fluid control component, characterized in that, The device includes a flow channel assembly (1) and a connecting assembly (2). The flow channel assembly (1) is fixedly connected or limited to the connecting assembly (2). The connecting assembly (2) includes a check valve (21) and a pipe fitting (22). The pipe fitting (22) has a hollow structure. The check valve (21) is located inside the pipe fitting (22). The flow channel assembly (1) has an inlet flow channel (101). The pipe fitting (22) has a first port (201) and a second port (202). The first port (201) is away from the flow channel assembly (1) relative to the second port (202). The first port (201) communicates with the outside. The second port (202) communicates with the inlet flow channel (101). The check valve (21) can move along the axial direction of the pipe fitting (22) to connect the first port (201) and the second port (202).

2. The fluid control assembly according to claim 1, characterized in that, A first plane is defined, which is perpendicular to the thickness direction of the flow channel assembly (1). Along the thickness direction of the flow channel assembly (1), the projection of the wall forming the first opening (201) on the first plane at least partially coincides with the projection of the wall forming the opening of the inlet flow channel (101) on the first plane.

3. The fluid control assembly according to claim 1 or 2, characterized in that, The pipe fitting (22) includes a first part (221) and a second part (222). The first part (221) is away from the flow channel assembly (1) relative to the second part (222). The first part (221) and the second part (222) are an integral structure, or the first part (221) and the second part (222) are fixedly connected or limitedly connected. The first part (221) is limitedly connected to the check valve (21), and the second part (222) is sealed to the flow channel assembly (1).

4. The fluid control assembly according to claim 3, characterized in that, The second part (222) has a mounting cavity (220), the second port (202) communicates the mounting cavity (220) and the inlet channel (101), at least a portion of the channel assembly (1) is located in the mounting cavity (220), and the channel assembly (1) is sealed to the wall that partially forms the mounting cavity (220).

5. The fluid control assembly according to claim 4, characterized in that, The second part (222) includes a first sidewall (223) and a second sidewall (224). The second sidewall (224) is away from the first part (221) relative to the first sidewall (223). The wall portion forming the mounting cavity (220) is located on the first sidewall (223) and partly on the second sidewall (224). A first step portion (225) is provided between the first sidewall (223) and the second sidewall (224). The first step portion (225) is disposed in the direction of the flow channel assembly (1). The flow channel assembly (1) includes a second step portion (11). The second step portion (11) is disposed opposite to the first step portion (225). The fluid control assembly (100) includes a first seal (4). The first seal (4) is sleeved on the flow channel assembly (1). The first seal (4) is located between the first step portion (225) and the second step portion (11). The first seal (4) seals against the second sidewall (224).

6. The fluid control assembly according to claim 5, characterized in that, The fluid control assembly (100) includes a snap-fit ​​member (3), the second part (222) has a first slot (222a) which is disposed along a portion of the peripheral wall of the second part (222), the first slot (222a) has an opening (222b) which communicates with the mounting cavity (220) through the opening (222b), the flow channel assembly (1) has a second slot (102) which is located away from the first step (225) relative to the second step (11) along the thickness direction of the flow channel assembly (1), the second slot (102) opens toward the outer peripheral wall of the flow channel assembly (1), the first slot (222a) and the second slot (102) are disposed opposite to each other, and the snap-fit ​​member (3) snaps into the first slot (222a) and the second slot (102).

7. The fluid control assembly according to claim 6, characterized in that, The snap-fit ​​component (3) includes an elastic body part (31) and a hook part (32). The elastic body part (31) and the hook part (32) are an integral structure. The elastic body part (31) has a U-shaped structure. The hook part (32) is located at both ends of the elastic body part (31). The hook part (32) extends along the thickness direction of the flow channel assembly (1). Part of the elastic body part (31) is sleeved on the peripheral wall of part of the second part (222) and part is located in the first slot (222a) and the second slot (102). The hook part (32) snaps against the peripheral wall of part of the second part (222).

8. The fluid control assembly according to any one of claims 3-7, characterized in that, The pipe fitting (22) has a valve port (203) located between the first port (201) and the second port (202). The first part (221) includes a limiting part (226) connected to a wall that partially forms the valve port (203). The limiting part (226) has a first through hole (226a). The check valve (21) is limited to the first through hole (226a). The check valve (21) includes a first sealing part (204). The fluid control assembly (100) includes a second sealing member (5) sleeved on the first sealing part (204). The second sealing member (5) is capable of sealingly abutting against the wall that forms the valve port (203).

9. The fluid control assembly according to claim 8, characterized in that, The limiting part (226) includes a support part (227) and a guide part (228). The support part (227) and the guide part (228) are integral structures. One end of the support part (227) is connected to the wall forming the valve port (203), and the other end is connected to the guide part (228). The first part (221) has a second through hole (221a), which is located between the support part (227) and the wall forming the valve port.

10. The fluid control assembly according to claim 9, characterized in that, The check valve (21) includes a plugging component (211), a guide rod (212), an elastic component (213), and a fixing block (214). The plugging component (211) is located away from the fixing block (214) relative to the elastic component (213). The plugging component (211) and the guide rod (212) are integrally formed, or the plugging component (211) and the guide rod (212) are fixedly connected or limitedly connected. The fixing block (214) is fixedly connected or limitedly connected to the guide rod (212). The elastic component (213) is sleeved on the peripheral wall of the guide rod (212). One end of the elastic component (213) abuts against the limiting part (226), and the other end abuts against the fixing block (214).

Images