One-way valve and fluid control assembly

Abstract

According to the one-way valve and the fluid control assembly, in the technical scheme of the one-way valve and the fluid control assembly, the size relation between the one-way valve and a runner plate conforms to L1 + L2-Hgt; therefore, after the first valve body abuts against the first mounting part and the second valve body abuts against the second mounting part, it can be guaranteed that a gap exists between two limiting faces at the joint of the first valve body and the second valve body, the possibility of extrusion stress between the first limiting face and the second limiting face is reduced, and then stress borne by the joint of the first valve body and the second valve body can be reduced.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to a one-way valve and fluid control assembly for vehicles. Background Technology

[0002] In related technologies, to facilitate the assembly of the valve core, a one-way valve includes a first valve body and a second valve body that are separately configured and connected in a limiting manner, with the valve core located in the cavity formed between the first valve body and the second valve body.

[0003] After the check valve is installed in the flow channel plate, in the closed state, the relatively high pressure fluid is connected to the cavity. The valve core abuts against the second valve body, preventing the relatively high pressure fluid from flowing out of the cavity of the check valve. Due to the influence of the fluid pressure difference, the second valve body may be subjected to the resultant force of the fluid in the direction away from the first valve body. Stress concentration will occur at the connection structure of the first and second valve bodies. Therefore, reducing the stress concentration at the valve body connection structure of the check valve is one of the key research points of those skilled in the art. Utility Model Content

[0004] One objective of this application is to provide a check valve and fluid control assembly that helps reduce stress concentration at the valve body connection structure of the check valve.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A one-way valve includes a valve core assembly and a valve body assembly. The valve body assembly includes a first valve body and a second valve body. The valve body assembly has a valve cavity, and at least a portion of the valve core assembly is located within the valve cavity. The second valve body includes a valve port, and the valve core assembly is capable of abutting against the valve port. The first valve body includes a first limiting surface and a first abutting surface, and the second valve body includes a second limiting surface and a second abutting surface. An external component includes a first mounting portion capable of abutting against or spaced from the first abutting surface and a second mounting portion capable of abutting against or spaced from the second abutting surface. The first valve body and the second valve body are arranged in the axial direction of the one-way valve. Along the axial direction of the one-way valve, the first mounting part, the first abutment surface, the second limiting surface, the first limiting surface, the second abutment surface, and the second mounting part are arranged in sequence. The first valve body and the second valve body are connected in a limiting manner, and at least part of the first limiting surface faces the second limiting surface. The distance from the first abutment surface to the first limiting surface is defined as L1, the distance from the second abutment surface to the second limiting surface is defined as L2, and the distance between the first mounting part and the second mounting part is H, where L1 + L2 - H > 0.

[0007] The dimensional relationship between the one-way valve and the external components after connection conforms to L1+L2-H>0. This ensures that even after the first valve body abuts against the first mounting part and the second valve body abuts against the second mounting part, there is still a gap between the two limiting surfaces at the connection between the first and second valve bodies. This reduces the possibility of pressure between the first and second limiting surfaces, thereby reducing the stress at the connection between the first and second valve bodies and reducing the risk of damage to the connection between the first and second valve bodies.

[0008] A fluid control assembly includes a one-way valve and a flow channel plate. The one-way valve includes a valve body assembly, which includes a first valve body and a second valve body. The first valve body and the second valve body are mutually limitingly connected. The first valve body includes a first limiting surface and a first abutting surface, and the second valve body includes a second limiting surface and a second abutting surface. The fluid control assembly includes a first mounting portion, which is fixedly connected to, mutually limitingly connected to, or integrally formed with the flow channel plate. The flow channel plate includes a second mounting portion. The first mounting portion is fixedly connected to or mutually limitingly connected to the first abutting surface, and the second abutting surface is integrally connected to... The second mounting part is fixedly connected or limited. The arrangement direction of the first valve body and the second valve body is defined as the axial direction of the one-way valve. Along the axial direction of the one-way valve, the first mounting part, the first abutment surface, the second limiting surface, the first limiting surface, the second abutment surface, and the second mounting part are arranged in sequence. The first limiting surface and the second limiting surface are clearance-fitted. The distance from the first abutment surface to the first limiting surface is defined as L1, the distance from the second abutment surface to the second limiting surface is defined as L2, and the distance between the first mounting part and the second mounting part is H, where L1 + L2 - H > 0.

[0009] In the technical solution of this application, the dimensional relationship between the one-way valve and the flow channel plate conforms to L1+L2-H>0, which ensures that even after the first valve body abuts against the first mounting part and the second valve body abuts against the second mounting part, there is still a gap between the two limiting surfaces at the connection between the first valve body and the second valve body. This reduces the possibility of extrusion stress between the first limiting surface and the second limiting surface, thereby helping to reduce the stress at the connection between the first valve body and the second valve body and reducing the risk of damage to the connection between the first valve body and the second valve body. Attached Figure Description

[0010] Figure 1 A cross-sectional schematic diagram of one embodiment of a fluid control assembly is shown;

[0011] Figure 2 It shows Figure 1 The diagram shows a cross-sectional view of one embodiment of the check valve.

[0012] Figure 3 It shows Figure 2A three-dimensional structural diagram of the first valve body of the one-way valve shown at an angle;

[0013] Figure 4 It shows Figure 2 A three-dimensional structural diagram of the second valve body of the one-way valve shown at an angle;

[0014] Figure 5 It shows Figure 1 A cross-sectional view of another embodiment of the check valve shown.

[0015] Figure 6 A cross-sectional schematic diagram of another embodiment of the fluid control assembly is shown;

[0016] Figure 7 It shows Figure 1 The diagram shows a cross-sectional view of one embodiment of the fluid control assembly.

[0017] Figure 8 It shows Figure 7 A partial enlarged view of the connection between the first valve body and the flow channel plate shown;

[0018] Figure 9 It shows Figure 7 A magnified view of the connection between the second valve body and the flow channel plate.

[0019] 1000. Fluid control assembly; 1. Check valve; 10. Valve body assembly; 11. First valve body; 111. First limiting surface; 112. First main body; 1121. Inner cavity; 113. First groove; 114. First seal; 115. First snap-fit ​​part; 116. First abutment surface; 117. Flange hole; 12. Second valve body; 121. Second limiting surface; 123. Snap-fit ​​groove; 1231. Opening; 1232. First section; 1233. Second section; 124. Second... 1. Main body; 125. Second abutment surface; 126. Second groove; 127. Second seal; 128. Second snap-fit ​​part; 129. Guide groove; 18. Valve port; 19. Valve outlet; 20. Valve cavity; 2. Flow channel plate; 21. First mounting part; 211. Fastener; 2111. Threaded part; 212. Retaining ring; 22. Inlet flow channel; 23. Outlet flow channel; 3. Mounting cavity; 31. Second mounting part; 321. Second side wall part; 322. First side wall part; 33. Step part; 36. First flared part; 37. Second flared part; 4. Valve core assembly; 41. Piston; 42. Guide plate. Detailed Implementation

[0020] The embodiments are described in detail below with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this application clearer, embodiments of this application are described below in conjunction with the accompanying drawings. 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.

[0022] like Figure 1 As shown, the one-way valve disclosed in this application includes a valve core assembly 4 and a valve body assembly 10. The valve body assembly 10 includes a first valve body 11 and a second valve body 12. The valve body assembly 10 has a valve cavity 20, and the valve core assembly 4 is located within the valve cavity 20. The one-way valve 1 includes a first valve body 11 and a second valve body 12. The second valve body 12 includes a valve port 18, and the valve core assembly 4 can abut against the valve port 18. Figure 4 As shown, the second valve body 12 includes a second main body portion 124, which extends from the valve port portion 18 to the second snap-fit ​​portion 128, and the second main body portion 124 is arranged at intervals along the circumference of the second snap-fit ​​portion 128.

[0023] The second valve body 12 includes a guide groove 129, which is located on the side of the second main body 124 near the valve core assembly 4. The guide groove 129 extends along the axial direction of the check valve 1. Figure 1 As shown in Z, the valve core assembly 4 includes a piston 41 and a guide plate 42. The piston 41 can abut against the valve port 18. The guide plate 42 extends from the piston 41 to the guide groove 129. Part of the guide plate 42 is located in the guide groove 129 and slides with the wall forming the guide groove 129. This guide plate 42 can guide the movement of the valve core assembly 4, which helps to improve the stability of the valve core assembly 4, ensures that the valve core assembly 4 moves axially, avoids radial shaking of the valve core assembly 4, and also helps the piston 41 of the valve core to contact the valve port 18 evenly, reducing leakage caused by the deflection of the piston 41.

[0024] like Figure 1 As shown, this application discloses a one-way valve 1, which includes a first valve body 11 and a second valve body 12. The first valve body 11 includes a first limiting surface 111 and a first abutting surface 116, and the second valve body 12 includes a second limiting surface 121 and a second abutting surface 125. The external component includes a first mounting part 21, which abuts against or is spaced apart from the flow channel plate 2, and a second mounting part 31, which abuts against or is spaced apart from the first abutting surface 116. When the first mounting part 21 and the second mounting part 31 abut against the first abutting surface 116 and the second abutting surface 125 respectively, the first mounting part 21 and the second mounting part 31 support the first valve body 11 and the second valve body 12, which helps to disperse the stress concentrated at the connection between the first valve body 11 and the second valve body 12.

[0025] The arrangement direction of the first valve body 11 and the second valve body 12 is defined as the axial direction of the check valve 1. The axial direction of the check valve is... Figure 1 As shown in Z, along the axial direction of the one-way valve 1, the first mounting part 21, the first abutting surface 116, the second limiting surface 121, the first limiting surface 111, the second abutting surface 125, and the second mounting part 31 are arranged in sequence. The first valve body 11 and the second valve body 12 are connected in a limiting manner. At least part of the first limiting surface (111) and the second limiting surface (121) face each other. The first limiting surface 111 and the second limiting surface 121 can be in a clearance fit state, which reduces the possibility of the first limiting surface 111 and the second limiting surface 121 being squeezed and subjected to force, thereby helping to reduce the stress on the connection between the first valve body 11 and the second valve body 12. Let L1 be the distance from the first abutment surface 116 to the first limiting surface 111, L2 be the distance from the second abutment surface 125 to the second limiting surface 121, and H be the distance between the first mounting part 21 and the second mounting part 31. During manufacturing, manufacturing tolerances may cause the values ​​of H, L1, or L2 to be larger or smaller than expected. However, as long as the dimensional relationship between the one-way valve 1 and the external components after manufacturing meets L1 + L2 - H > 0, then...

[0026] After the first valve body 11 and the second valve body 12 abut against the first and second mounting parts 31 respectively, a certain distance can still be maintained between the two limiting surfaces at the connection of the first valve body 11 and the second valve body 12. This reduces the possibility of pressure between the first limiting surface 111 and the second limiting surface 121, thereby helping to reduce the stress on the connection of the first valve body 11 and the second valve body 12. Especially when the check valve is working, the relatively high-pressure fluid is connected to the valve chamber 20. The valve core abuts against the second valve body, preventing the relatively high-pressure fluid from flowing out of the check valve from the valve chamber 20. Due to the pressure difference of the fluid, the second valve body is subjected to the resultant force of the fluid moving away from the first valve body, and the first valve body is subjected to the resultant force of the fluid moving away from the second valve body. At this time, the first valve body abuts against the first mounting part, and the second valve body abuts against the second mounting part. There is still a gap between the first limiting surface 111 and the second limiting surface 121, reducing the risk of damage due to stress concentration at the connection of the first valve body and the second valve body.

[0027] The inventors discovered during the research that manufacturing tolerances may cause the values ​​of H, L1, and L2 to be too large or too small. After the upper and lower valve bodies are connected and fixed to the first and second mounting parts, the tolerances will accumulate at the snap-fit ​​structure between the upper and lower valve bodies, which may cause the snap-fit ​​structure to be subjected to compressive stress. The present solution preferably has L1+L2-H>0.05, leaving a tolerance compensation gap between the first and second snap-fit ​​surfaces and the second limiting surface, which helps to avoid the possibility of compressive stress at the snap-fit ​​surface due to manufacturing tolerances and reduces stress concentration at the connection structure.

[0028] like Figure 2As shown, in one embodiment of the limiting connection of this application, a first valve body 11 and a second valve body 12 are engaged. The first valve body 11 includes a first engaging portion 115, which is located at one end of the first valve body 11 near the second abutment surface 125. The second valve body 12 includes a second engaging portion 128, which is located at one end of the second valve body 12 near the first abutment surface 116. A plane perpendicular to the axial direction of the one-way valve 1 is defined as a reference plane A. The projections of the first engaging portion 115 and the second engaging portion 128 on the reference plane A at least partially overlap. Along the axial direction of the one-way valve 1, a first limiting surface 111 is located at one end face of the first engaging portion 115 near the second engaging portion 128, and a second limiting surface 121 is located at one end face of the second engaging portion 128 near the first engaging portion 115. A gap is provided between the first limiting surface 111 and the second limiting surface 121. This design achieves a snap-fit ​​connection by mutually limiting the first snap-fit ​​portion 115 and the second snap-fit ​​portion 128. Along the axial direction of the one-way valve 1, the first mounting portion 21, the first abutment surface 116, the second snap-fit ​​portion 128, the first snap-fit ​​portion 115, the second abutment surface 125, and the second mounting portion 31 are arranged sequentially. A gap is actively provided between the first snap-fit ​​portion 115 and the second snap-fit ​​portion 128, reducing the possibility of pressure between them and thus helping to reduce the stress on the snap-fit ​​joint of the first valve body 11 and the second valve body 12. Furthermore, the snap-fit ​​connection of the first valve body 11 and the second valve body 12 not only facilitates the assembly of the first valve body 11 and the second valve body 12, but also facilitates the disassembly and replacement of the first valve body 11 and the second valve body 12 when there is partial damage to the one-way valve 1.

[0029] like Figure 3 As shown, the first valve body 11 includes a first main body portion 112, and a first engaging portion 115 extending outward from the circumferential outer wall of the first main body portion 112, or extending inward from the circumferential inner wall of the first main body portion 112. The first engaging portion 115 of the first valve body 11 protrudes relative to the wall surface of the first main body portion 112, and engages with the second engaging portion 128 of the second valve body 12, which helps to prevent the first valve body 11 and the second valve body 12 from axially separating from each other. Furthermore, the first engaging portion 115 and the first main body portion 112 are integrally structured and can be processed by machining, injection molding, or other methods.

[0030] like Figures 2 to 4As shown, in one embodiment of the second latching portion 128 of this application, the second latching portion 128 has a latching groove 123, and the first main body portion 112 has an inner cavity 1121. At least a portion of the second latching portion 128 is located in the inner cavity 1121, and at least a portion of the first latching portion 115 is located in the latching groove 123. The first latching portion 115 in the form of a snap fastener and the second latching portion 128 in the form of a groove are mutually engaged. The snap fastener structure is stable and helps to prevent the first valve body 11 and the second valve body 12 from axially separating from each other. The wall forming the latching groove 123 includes a second limiting surface 121. Along the axial direction of the one-way valve 1, the width of the latching groove 123 is greater than the width of the first latching portion 115. The second limiting surface 121 is located in the latching groove, and the first limiting surface 111 is located in the snap fastener. The gap between the first limiting surface 111 and the second limiting surface 121 can be adjusted by adjusting the thickness of the snap fastener and the width of the latching groove in the axial direction. During installation, the first snap-fit ​​part 115 can be rotated into place, or it can be directly snapped into the snap-fit ​​groove 123 along the axial direction.

[0031] like Figure 4 As shown, preferably, the snap-fit ​​groove 123 has an opening 1231 on one end face of the second valve body 12 near the first valve body 11. During snap-fit ​​installation, the first snap-fit ​​part 115 enters the snap-fit ​​groove 123 through the opening 1231. The snap-fit ​​groove 123 includes a first section 1232 and a second section 1233. The first section 1232 communicates with the opening 1231, and the second section 1233 extends from the first section 1232 along the circumference of the second valve body 12. The wall of the second section 1233 can guide the first snap-fit ​​part 115 to rotate circumferentially along the one-way valve 1. After entering the snap-fit ​​groove 123 through the opening 1231, it rotates to face the second limiting surface 121. The first snap-fit ​​installation is completed when the first snap-fit ​​part 115 is in the correct position. Compared with the method of directly snapping into the snap-fit ​​groove 123 along the axial direction, the deformation of the first snap-fit ​​part 115 is smaller, which reduces the risk of deformation and damage to the first snap-fit ​​part 115 and also reduces the installation difficulty. In addition, under extreme environments such as vibration, the axial snap-fit ​​method has the risk of detachment when the first valve body 11 and the second valve body 12 are subjected to axial tension, while the rotation snap-fit ​​method requires reverse rotation to disassemble. The rotation snap-fit ​​method helps to reduce the risk of the first valve body 11 and the second valve body 12 detaching due to vibration and other conditions, and has better stability.

[0032] like Figure 5As shown, in another embodiment of the second latching portion 128 of this application, the second valve body 12 includes a valve port portion 18 and a valve outlet 19. The valve outlet 19 is located on the circumferential outer wall of the second valve body 12. Along the axial direction of the one-way valve 1, the valve outlet 19 is located between the valve port portion 18 and the second latching portion 128. The wall forming the valve outlet 19 includes a second limiting surface 121, and at least a portion of the first latching portion 115 is located at the valve outlet 19. The second main body portion 124, the valve port portion 18, and the second latching portion 128 of the second valve body 12 surround the valve outlet 19. Compared with the solution that requires a separate slot to be provided on the second latching portion 128 of the second valve body 12 to cooperate with the first latching portion 115, at least a portion of the first latching portion 115 of the first valve body 11 is directly located at the valve outlet 19 and spaced apart from the second latching portion 128 of the second valve body 12. This makes the structure of the second valve body 12 simple, which is beneficial for simplifying the mold and for demolding the injection mold.

[0033] like Figure 7 As shown, a fluid control assembly 1000 includes a one-way valve 1 and a flow channel plate 2. The one-way valve includes a valve body assembly 10, which includes a first valve body (11) and a second valve body (12). The flow channel plate (2) has a mounting cavity (3), and at least a portion of the second valve body (12) is located in the mounting cavity (3). The flow channel plate 2 includes a mounting cavity 3, and at least a portion of the one-way valve 1 is located in the mounting cavity 3. The flow channel plate 2 also includes an inlet flow channel 22 and an outlet flow channel 23. The mounting cavity 3 is located between the inlet flow channel 22 and the outlet flow channel 23. The one-way valve 1 disclosed in this application plays a role in controlling the direction of fluid flow in the mounting cavity 3. Figure 1 As shown, the one-way valve 1 includes a valve core assembly 4 and a valve chamber 20. The valve core assembly 4 is located inside the valve chamber 20. The one-way valve 1 includes a first valve body 11 and a second valve body 12. The second valve body 12 includes a valve port 18. The valve core assembly 4 can abut against the valve port 18. When the pressure of the inlet flow channel 22 is greater than that of the outlet flow channel 23, the valve core assembly 4 opens the valve port 18, and the inlet flow channel 22 communicates with the valve chamber 20. The second valve body 12 includes a valve outlet 19, which is located on the radial sidewall of the second valve body 12. The valve chamber 20 communicates with the outlet flow channel 23 through the valve outlet 19, so that fluid can flow from the inlet flow channel 22 into the outlet flow channel 23. When the pressure of the inlet flow channel 22 is less than that of the outlet flow channel 23, the valve core assembly 4 of the one-way valve 1 abuts against the valve port 18 of the second valve body 12, so that fluid cannot flow back from the valve chamber 20 into the inlet flow channel 22.

[0034] like Figure 7 and Figure 9As shown, in one embodiment of the second mounting portion 31 of this application, the flow channel plate 2 includes a first sidewall portion 322 surrounding the second valve body 12. The wall forming the mounting cavity 3 includes the first sidewall portion 322. The second mounting portion 31 protrudes radially inward from the first sidewall portion 322 toward the one-way valve 1. A second abutment surface 125 is located at the end face of the second valve body 12 away from the first valve body 11, and abuts against the second mounting portion 31. Since the second abutment surface 125 is located at the end face of the second valve body 12 away from the first valve body 11, and the second mounting portion 31 protrudes relative to the first sidewall portion 322, the second abutment surface 125 can abut against the second mounting portion 31. When the second valve body 12 is pressed and moves downward, the second mounting portion 31 can effectively support the second valve body 12, providing support for the second valve body 12 and helping to reduce the pressure at the connection between the second valve body 12 and the first valve body 11.

[0035] like Figure 7 and Figure 8 As shown, in one embodiment of the first mounting part 21 of this application, the first mounting part 21 is located on the end face of the retaining ring 212 near the first valve body 11. The retaining ring 212 is connected to the wall of the flow channel plate 2 for limiting. The first abutting surface 116 is located on the end face of the first valve body 11 away from the second valve body 12. The first abutting surface 116 abuts against the retaining ring 212. Compared with the scheme of welding the first mounting part 21 and the first abutting surface 116, the retaining ring 212 is easier to disassemble and the installation is also simpler. The flow channel plate 2 includes a second sidewall portion 321 and a stepped portion 33. The second sidewall portion 321 surrounds the first valve body 11, and the stepped portion 33 protrudes outward along the outer sidewall of the second sidewall portion 321. Along the axial direction of the one-way valve 1, one end of the first valve body 11 abuts against the retaining ring 212, and the other end of the first valve body 11 abuts against the stepped portion 33. During installation, the one-way valve 1 is placed into the mounting cavity 3 until the first valve body 11 abuts against the stepped portion 33. At this point, the retaining ring 212 is installed into the mounting cavity 3, thus completing the installation of the one-way valve 1. The stepped portion 33 and the retaining ring 212 are located on both sides of the first valve body 11, which can limit and support the first valve body 11. When the first valve body 11 is under pressure, the retaining ring 212 and the stepped portion 33 can provide support, which helps to reduce the pressure at the connection between the first valve body 11 and the second valve body 12. It is worth noting that, in order to facilitate the installation of the retaining ring 212, the retaining ring 212 and the first valve body 11 or the stepped portion 33 and the first valve body 11 can be in a transition fit.

[0036] like Figure 6As shown, in another embodiment of the first mounting portion 21 of this application, the fluid control assembly 1000 includes a fastener 211. The fastener 211 includes the first mounting portion 21 and a threaded portion 2111. A first abutment surface 116 is located on the end face of the first valve body 11 away from the second valve body 12. The end of the first mounting portion 21 facing the second valve body 12 abuts against the first abutment surface 116. The first valve body 11 includes a flange hole 117, which has an opening 1231 on the first abutment surface 116. A portion of the threaded portion 2111 is located inside the flange hole 117, and the threaded portion 2111 is threadedly connected to the flow channel plate 2. The threaded fixing method facilitates disassembly and installation. The fastener 211 can be a screw, bolt, etc. The first valve body 11 is located between the first mounting portion 21 and the flow channel plate 2. When the first valve body 11 is under pressure, the first mounting portion 21 can provide support, which helps to reduce the pressure at the connection between the first valve body 11 and the second valve body 12.

[0037] like Figure 8 As shown, in one embodiment of the sealing structure of this application, the flow channel plate 2 includes a mounting cavity 3, with at least a portion of the one-way valve 1 located within the mounting cavity 3. The first valve body 11 includes a first groove 113, and the one-way valve 1 includes a first sealing element 114. The first sealing element 114 is located within the first groove 113, which facilitates the positioning of the first sealing element 114 and helps prevent the first sealing element 114 from falling off the first valve body 11. The wall forming the mounting cavity 3 includes a second side wall portion 321, which surrounds the first valve body 11. The first sealing element 114 abuts against the second side wall portion 321, providing a sealing effect and reducing the risk of external leakage of the one-way valve 1. During the research process, the inventors discovered that since the first seal 114 needs to abut against the second side wall portion 321, the first seal 114 needs to protrude relatively from the circumferential outer wall of the first valve body 11. However, during the insertion of the one-way valve 1 into the mounting cavity 3, due to the change in inner diameter of the inner wall of the mounting cavity 3, there may be a stepped structure. The first seal 114 is at risk of being damaged by the squeezing and friction with the edge of the stepped structure. Therefore, this solution forms the wall of the mounting cavity 3 including a first flared portion 36. Along the axial direction of the one-way valve 1, the first flared portion 36 extends from the second side wall portion 321 in a direction away from the second valve body 12. In the direction away from the second valve body 12, the inner diameter of the first flared portion 36 gradually increases. The gradually expanding first flared portion 36 replaces the stepped structure. The first flared portion 36 can guide the first seal 114, which helps to avoid the risk of damage caused by the edge of the stepped structure squeezing the first seal 114.

[0038] like Figure 9As shown, the second valve body 12 includes a second groove 126, and the one-way valve 1 includes a second seal 127. The second seal 127 is located in the second groove 126. The wall forming the mounting cavity 3 includes a first side wall portion 322 and a second flared portion 37. The first side wall portion 322 surrounds the second valve body 12, and the second seal 127 abuts against the first side wall portion 322. Along the axial direction of the one-way valve 1, the second flared portion 37 extends from the first side wall portion 322 toward the direction closer to the first valve body 11. The inner diameter of the second flared portion 37 gradually increases toward the direction closer to the first valve body 11. During the research process, the inventors discovered that the second seal 127 needs to protrude relatively from the circumferential outer wall of the first valve body 11. However, during the insertion of the one-way valve 1 into the mounting cavity 3, the inner wall of the mounting cavity 3 between the first side wall portion 322 and the opening 1231 of the mounting cavity 3 has a stepped structure due to the change in inner diameter. The second seal 127 is at risk of being damaged by the squeezing and friction with the edge of the stepped structure. The second flared portion 37 with a gradually increasing inner diameter can guide the second seal 127, which helps to avoid the risk of damage caused by the edge of the stepped structure squeezing the second seal 127.

[0039] 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. 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 make modifications or 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 one-way valve characterized by, The one-way valve comprises a valve core assembly (4) and a valve body assembly (10), the valve body assembly (10) comprises a first valve body (11) and a second valve body (12), the valve body assembly (10) has a valve cavity (20), at least part of the valve core assembly (4) is located in the valve cavity (20), the second valve body (12) comprises a valve port portion (18), the valve core assembly (4) can abut with the valve port portion (18), the first valve body (11) comprises a first limiting surface (111) and a first abutting surface (116), the second valve body (12) comprises a second limiting surface (121) and a second abutting surface (125), the arrangement direction of the first valve body (11) and the second valve body (12) is defined as the axial direction of the one-way valve (1), along the axial direction of the one-way valve (1), the first mounting portion (21), the first abutting surface (116), the second limiting surface (121), the first limiting surface (111), the second abutting surface (125), and the second mounting portion (31) are arranged in sequence, the first valve body (11) and the second valve body (12) are limitedly connected, at least part of the first limiting surface (111) faces the second limiting surface (121); the distance from the first abutting surface (116) to the first limiting surface (111) is defined as L1, the distance from the second abutting surface (125) to the second limiting surface (121) is defined as L2, and the distance between the first mounting portion (21) and the second mounting portion (31) is H, L1+L2-H>0.

2. The one-way valve of claim 1, wherein The first valve body (11) and the second valve body (12) are clamped, the first valve body (11) comprises a first clamping portion (115), the first clamping portion (115) is located at one end of the first valve body (11) close to the second abutting surface (125), the second valve body (12) comprises a second clamping portion (128), the second clamping portion (128) is located at one end of the second valve body (12) close to the first abutting surface (116), and the first limiting surface (111) is arranged in a gap with the second limiting surface (121); a plane perpendicular to the axial direction of the one-way valve (1) is defined as a reference plane A, the projection of the first clamping portion (115) and the second clamping portion (128) on the reference plane A at least partially overlaps, along the axial direction of the one-way valve (1), the first limiting surface (111) is located at one end surface of the first clamping portion (115) close to the second clamping portion (128), and the second limiting surface (121) is located at one end surface of the second clamping portion (128) close to the first clamping portion (115).

3. The one-way valve of claim 2, wherein, The first valve body (11) comprises a first main body part (112), the first clamping part (115) extends outwardly from a circumferential outer wall of the first main body part (112), or the first clamping part (115) extends inwardly from a circumferential inner wall of the first main body part (112).

4. The one-way valve of claim 3, wherein, The second clamping part (128) has a clamping groove (123), the first main body part (112) has an inner cavity (1121), at least part of the second clamping part (128) is located in the inner cavity (1121), at least part of the first clamping part (115) is located in the clamping groove (123), the wall forming the clamping groove (123) comprises a second limiting surface (121), along the axial direction of the one-way valve (1), the width of the clamping groove (123) is greater than the width of the first clamping part (115).

5. The one-way valve of claim 4, wherein, The clamping groove (123) has an opening (1231) on one end surface of the second valve body (12) close to the first valve body (11), the clamping groove (123) comprises a first section (1232) and a second section (1233), the first section (1232) communicates with the opening (1231), the second section (1233) extends along the circumferential direction of the second valve body (12) from the first section (1232), and the wall forming the second section (1233) can guide the first clamping part (115) to rotate along the circumferential direction of the one-way valve (1).

6. The one-way valve of claim 3, wherein, The second valve body (12) has a valve outlet (19), the valve outlet (19) is located on the circumferential outer wall of the second valve body (12), along the axial direction of the one-way valve (1), the valve outlet (19) is located between the valve port part (18) and the second clamping part (128), the wall forming the valve outlet (19) comprises a second limiting surface (121), and at least part of the first clamping part (115) is located in the valve outlet (19).

7. The one-way valve according to any one of claims 2-6, wherein, The second valve body (12) comprises a second main body part (124), the second main body part (124) extends from the valve port part (18) to the second clamping part (128), the second main body part (124) is arranged in the circumferential direction of the second clamping part (128), the second valve body (12) has a guide groove (129), the guide groove (129) is located on one side of the second main body part (124) close to the valve core assembly, the guide groove (129) extends along the axial direction of the one-way valve (1), the valve core assembly (4) comprises a piston (41) and a guide plate (42), the piston (41) can abut against the valve port part (18), the guide plate (42) extends from the piston (41) to the guide groove (129), part of the guide plate (42) is located in the guide groove (129), and the guide plate (42) is in sliding fit with the wall forming the guide groove (129).

8. A fluid control assembly comprising a check valve (1) and a flow channel plate (2), characterized in that, The one-way valve comprises a valve body assembly (10), the valve body assembly (10) comprises a first valve body (11) and a second valve body (12), the flow channel plate (2) has a mounting cavity (3), at least part of the second valve body (12) is located in the mounting cavity (3), the first valve body (11) comprises a first limiting surface (111) and a first abutting surface (116), the second valve body (12) comprises a second limiting surface (121) and a second abutting surface (125); the fluid control assembly comprises a first mounting portion (21), the first mounting portion (21) is fixedly connected or limitingly connected with the flow channel plate (2) or is in an integral structure, the flow channel plate (2) comprises a second mounting portion (31); the first mounting portion (21) is fixedly connected or limitingly connected with the first abutting surface (116), the second abutting surface (125) is fixedly connected or limitingly connected with the second mounting portion (31), the arrangement direction of the first valve body (11) and the second valve body (12) is defined as the axial direction of the one-way valve (1), along the axial direction of the one-way valve (1), the first mounting portion (21), the first abutting surface (116), the second limiting surface (121), the first limiting surface (111), the second abutting surface (125) and the second mounting portion (31) are arranged in sequence, the first valve body (11) and the second valve body (12) are limitingly connected, the first limiting surface (111) is in clearance fit with the second limiting surface (121); the distance from the first abutting surface (116) to the first limiting surface (111) is defined as L1, the distance from the second abutting surface (125) to the second limiting surface (121) is defined as L2, and the distance between the first mounting portion (21) and the second mounting portion (31) is H, L1+L2-H >0.

9. The fluid control assembly of claim 8, wherein, The flow channel plate (2) comprises a first side wall portion (322) surrounding the second valve body (12), the wall of the mounting cavity (3) comprises the first side wall portion (322), the second mounting portion (31) protrudes to the radial inner side of the one-way valve (1) relative to the first side wall portion (322), the second abutting surface (125) is located on the end surface of the second valve body (12) away from the first valve body (11), and the second abutting surface (125) can abut with the second mounting portion (31); the fluid control assembly comprises a check ring (212), the first mounting portion (21) is located on the end surface of the check ring (212) close to the first valve body (11), the check ring (212) is limit connected with the flow channel plate (2), and the first abutting surface (116) is located on the end surface of the first valve body (11) away from the second valve body (12); the flow channel plate (2) comprises a second side wall portion (321) and a step portion (33), the second side wall portion (321) surrounds the first valve body (11), the step portion (33) protrudes inward along the second side wall portion (321) and along the axial direction of the one-way valve (1), one end of the first valve body (11) abuts with the first mounting portion (21), and the other end of the first valve body (11) abuts with the step portion (33).

10. The fluid control assembly of claim 8, wherein, The fluid control assembly (1000) comprises a fastener (211), the fastener (211) comprises a first mounting portion (21) and a threaded portion (2111), the first abutting surface (116) is located on the end surface of the first valve body (11) away from the second valve body (12), the first mounting portion (21) abuts with the first abutting surface (116) at one end towards the second valve body (12), the first valve body (11) comprises a flange hole (117), the flange hole (117) has an opening at the first abutting surface (116), a part of the threaded portion (2111) is located in the flange hole (117), and the threaded portion (2111) is threadedly connected with the flow channel plate (2).

11. The fluid control assembly of any of claims 8-10, wherein, The first valve body (11) comprises a first groove (113), the check valve (1) comprises a first sealing element (114), the first sealing element (114) is located in the first groove (113), the wall forming the mounting cavity (3) comprises a second side wall portion (321) and a first flared portion (36), the second side wall portion (321) surrounds the first valve body (11); the first sealing element (114) is in abutment with the second side wall portion (321) along the axial direction of the check valve (1), the first flared portion (36) extends from the second side wall portion (321) to a direction away from the second valve body (12), and the inner diameter of the first flared portion (36) gradually increases in a direction away from the second valve body (12); the second valve body (12) comprises a second groove (126), the check valve (1) comprises a second sealing element (127), the second sealing element (127) is located in the second groove (126), the wall forming the mounting cavity (3) comprises a first side wall portion (322) and a second flared portion (37), the first side wall portion (322) surrounds the second valve body (12), the second sealing element (127) is in abutment with the first side wall portion (322) along the axial direction of the check valve (1), the second flared portion (37) extends from the first side wall portion (322) to a direction close to the first valve body (11), and the inner diameter of the second flared portion (37) gradually increases in a direction close to the first valve body (11).

12. The fluid control assembly of any one of claims 8-11, wherein, The flow channel plate (2) comprises an inlet flow channel (22) and an outlet flow channel (23), the check valve (1) comprises a valve core assembly (4) and a valve cavity (20), the valve core assembly (4) is located in the valve cavity (20), the second valve body (12) comprises a valve port portion (18), the valve core assembly (4) can be in abutment with the valve port portion (18), when the valve core assembly (4) opens the valve port portion (18), the inlet flow channel (22) communicates with the valve cavity (20) through the valve port portion (18), the second valve body (12) comprises a valve outlet (19), the valve outlet (19) is located on the radial side wall of the second valve body (12), and the valve cavity (20) communicates with the outlet flow channel (23) through the valve outlet (19).

13. The fluid control assembly of claim 12, wherein, The first valve body (11) and the second valve body (12) are clamped, the first valve body (11) comprises a first clamping portion (115), the first clamping portion (115) is located at one end of the first valve body (11) close to the second abutting face (125), the second valve body (12) comprises a second clamping portion (128), the second clamping portion (128) is located at one end of the second valve body (12) close to the first abutting face (116), and a gap is provided between the first limiting face (111) and the second limiting face (121); a plane perpendicular to the axial direction of the one-way valve (1) is defined as a reference plane A, projections of the first clamping portion (115) and the second clamping portion (128) on the reference plane A at least partially overlap, along the axial direction of the one-way valve (1), the first limiting face (111) is located at one end face of the first clamping portion (115) close to the second clamping portion (128), and the second limiting face (121) is located at one end face of the second clamping portion (128) close to the first clamping portion (115); the first valve body (11) comprises a first main body portion (112), the first clamping portion (115) extends outward from the circumferential outer wall of the first main body portion (112), or the first clamping portion (115) extends inward from the circumferential inner wall of the first main body portion (112); the second clamping portion (128) has a clamping groove (123), the first main body portion (112) has an inner cavity (1121), at least part of the second clamping portion (128) is located in the inner cavity (1121), at least part of the first clamping portion (115) is located in the clamping groove (123), a wall forming the clamping groove (123) comprises the second limiting face (121), along the axial direction of the one-way valve (1), the width of the clamping groove (123) is greater than the width of the first clamping portion (115); the clamping groove (123) has an opening (1231) at one end face of the second valve body (12) close to the first valve body (11), the clamping groove (123) comprises a first section (1232) and a second section (1233), the first section (1232) communicates with the opening (1231), the second section (1233) extends along the circumferential direction of the second valve body (12) from the first section (1232), and a wall forming the second section (1233) can guide the first clamping portion (115) to rotate along the circumferential direction of the one-way valve (1); the second valve body (12) has a valve outlet (19), the valve outlet (19) is located at the circumferential outer wall of the second valve body (12), along the axial direction of the one-way valve (1), the valve outlet (19) is located between the valve port portion (18) and the second clamping portion (128), a wall forming the valve outlet (19) comprises the second limiting face (121), and at least part of the first clamping portion (115) is located in the valve outlet (19).The second valve body (12) comprises a second main body part (124) extending from the valve port part (18) to the second clamping part (128), the second main body part (124) is arranged in a circumferential direction of the second clamping part (128), the second valve body (12) has a guide groove (129) located on a side of the second main body part (124) close to the valve core assembly, the guide groove (129) extends in an axial direction of the one-way valve (1), the valve core assembly (4) comprises a piston (41) capable of abutting the valve port part (18) and a guide plate (42) extending from the piston (41) to the guide groove (129), part of the guide plate (42) is located in the guide groove (129) and the guide plate (42) is in sliding fit with the wall forming the guide groove (129).

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