One-way valve and fluid control assembly

Abstract

A one-way valve (1) and a fluid control assembly (50). The one-way valve (1) has a first region (316); the first region (316) is located between a first inner side wall (1011a) of a valve body (10) and a first outer side wall (311) of a valve core (31); the flow cross-sectional area of the first region (316) is S1, the flow cross-sectional area of a valve port (40a) is S2, and S1 is greater than or equal to S2; when the one-way valve (1) works in a first state, the first region (316) is in communication with the valve port (40a), and fluid flows through the first region (316) from the valve port (40a). The setting that S1 is greater than or equal to S2 is conducive to reducing pressure drop after the fluid is guided out from the valve port (40a), thereby reducing pressure drop of the one-way valve (1).

Description

One-way valve and fluid control assembly

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 28, 2023, with application number 2023116082000 and invention name “A one-way valve and fluid control component”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of valve technology, and in particular to a one-way valve and a fluid control assembly. Background Art

[0003] Check valves are a common component in air conditioning systems, installed in channels that allow one-way flow. They are typically mounted to integrated modules or flow path pipes for securement. Reducing the pressure drop across check valves remains a technical challenge. Summary of the Invention

[0004] The purpose of this application is to provide a one-way valve and a fluid control assembly, which are conducive to reducing pressure drop.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application adopts the following technical solution: a one-way valve, characterized in that: it includes a valve body and a valve core component, the one-way valve has a valve cavity, at least part of the valve core component is located in the valve cavity, the valve core component includes a valve core, the one-way valve includes a valve mouth part, along the axial direction of the valve body, the valve core can move to close the valve mouth of the valve mouth part; the wall forming the valve cavity includes a first inner wall, the valve core includes a first outer wall, defining a first area, when the valve core is in a state of closing the valve mouth, along the radial direction of the valve core, the first area is located between the first inner wall and the first outer wall; the one-way valve includes a first state, when the one-way valve is in the first state, the first area is connected to the valve port, the flow cross-sectional area of ​​the first area is S1, and the flow cross-sectional area of ​​the valve port is defined as S2, S1≥S2.

[0006] Another embodiment of the present application adopts the following technical solution: a fluid control component, comprising a mounting portion and the above-mentioned one-way valve, the mounting portion having a mounting cavity and a fluid channel, at least a portion of the one-way valve being located in the mounting cavity, the valve body being connectable to the mounting portion, the one-way valve having a first channel and a second channel, wherein a portion of the fluid channel is connected to the first channel, and another portion of the fluid channel is connected to the second channel.

[0007] An embodiment of the present application discloses a one-way valve and a fluid control component. The one-way valve has a first area, which is located between the first inner wall of the valve body and the first outer wall of the valve core. The flow cross-sectional area of ​​the first area is S1, and the flow cross-sectional area of ​​the valve port is S2. S1≥S2. When the one-way valve is operating in the first state, the first area is connected to the valve port, and the fluid flows from the valve port through the first area. Setting S1≥S2 is beneficial to reducing the pressure drop of the fluid after it is discharged from the valve port, thereby reducing the pressure drop of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a schematic diagram of the three-dimensional structure of a one-way valve in this embodiment;

[0009] FIG2 is a schematic cross-sectional view of the one-way valve in a second state of the present embodiment;

[0010] FIG3 is a schematic cross-sectional view of the valve core component in this embodiment;

[0011] FIG4 is a schematic cross-sectional view of the second component in this embodiment;

[0012] FIG5 is a partial enlarged schematic diagram of point A in FIG2;

[0013] 6 is a schematic cross-sectional view of the one-way valve in the third state of this embodiment;

[0014] FIG7 is a schematic diagram of the explosion structure of the one-way valve in this embodiment;

[0015] FIG8 is a schematic cross-sectional view of the fluid control assembly in this embodiment;

[0016] FIG9 is a partial enlarged schematic diagram of point B in FIG8;

[0017] Figure 10 is a schematic diagram of the three-dimensional structure of the sealing part in this embodiment. 1. One-way valve; 10. Valve body; 10a. Valve cavity; 100b. First cavity; 100c. Second cavity; 101. First component; 1011. Wall portion; 1011a. First inner wall; 1011b. Connecting portion; 1012b. Top wall; 102. Second component; 1021. Groove portion; 1021a. Step portion; 1021b. Transition section; 1021c. Guide section; 1022. Fitting portion; 103. Raised portion; 103a. Bottom wall; 103b. First wall; 20. First opening; 20a. First opening; 21. Second opening; 21a. Second opening; 22. First channel; 23. Second channel; 30. Valve core component; 31, valve core; 311, first outer wall; 312, second outer wall; 313, transition wall; 314, accommodating portion; 315, guide portion; 316, first area; 32, elastic member; 33, sealing member; 34, balancing hole; 35, limit member; 40, valve mouth portion; 40a, valve mouth; 50, fluid control component; 51, mounting portion; 51a, mounting cavity; 51b, fluid channel; 52, sealing portion; 52a, first abutting portion; 52b, second abutting portion; 53, first press-fit wall; 54, second press-fit wall. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] A one-way valve 1, as shown in Figures 1 and 2, includes a valve body 10 and a valve core component 30. The one-way valve 1 has a valve cavity 10a, with at least a portion of the valve core component 30 located in the valve cavity 10a. The valve core component 30 includes a valve core 31. The one-way valve 1 includes an elastic member 32, one end of which abuts the valve core 31, and the other end of which abuts the top wall 1012b. The elastic member 32 can exert a valve-closing force on the valve core 31. The one-way valve 1 includes a valve opening 40, which has a valve opening 40a. Along the axial direction of the valve core 31, the valve core 31 can be moved under the action of the elastic member 32 to one-way abut the valve opening 40 to close the valve opening 40a.

[0020] The one-way valve 1 includes a first channel 22 and a second channel 23. The first channel 22 is located on the side of the valve body 10, and the second channel 23 is located on at least one end of the valve body 10. Along the axial direction of the valve core 31, the valve port 40a is located between the first channel 22 and the second channel 23. When the pressure in the second channel 23 is greater than that in the first channel 22, the valve core 31 is pushed open by the pressure differential, allowing fluid to flow from the second channel 23 to the first channel 22. When fluid flows from the first channel 22 to the second channel 23, the pressure in the first channel 22 is greater than that in the second channel 23. Because the side of the valve core 31 near the second channel 23 abuts the valve port 40, the valve core 31 cannot open the valve port 40a, thus blocking the flow.

[0021] 2-4 , the valve core 31 includes a first outer wall 311, a second outer wall 312, and a transition wall 313. Along the axial direction of the valve core 31, the transition wall 313 is located between the first outer wall 311 and the second outer wall 312, with the first outer wall 311 being closer to the valve port 40a than the second outer wall 312. The valve body 10 includes a first inner wall 1011a, which forms the walls of the valve cavity 10a. At least a portion of the second outer wall 312 abuts or has a clearance fit with the first inner wall 1011a. The second outer wall 312 and the first inner wall 1011a are capable of sliding engagement, guiding the valve core 31's opening and closing movements, thereby reducing deflection of the valve core 31 and improving the sealing performance of the one-way valve 1.

[0022] Along the axial direction of the valve core 31, the transition wall 313 is located between the first outer wall 311 and the second outer wall 312. The diameter of the transition wall 313 gradually decreases from the second outer wall 312 toward the first outer wall 311. As shown in Figures 2-4, when the valve core 31 is in the closed position of the valve port 40a, a gap exists between the first inner wall 1011a and the first outer wall 311, namely, the first region 316. The one-way valve 1 has a first state, as shown in Figure 6. In the first state, the first region 316 is in communication with the valve port 40a. As shown in Figures 2-4 , when the valve core 31 is in the closed position of the valve port 40a, the first region 316 is located between the first inner wall 1011a and the first outer wall 311. As shown in Figure 6 , when the one-way valve 1 is operating in the first position, the flow cross-sectional area of ​​the first region 316 is S1, and one flow cross-section of the first region 316 is annular, or in other words, cylindrical. The flow cross-sectional area of ​​the valve port 40a is S2, where S1 ≥ S2. It should be noted that the flow cross-sectional area of ​​the first region 316 can vary across different flow cross-sectional areas of the first region. When the flow cross-sectional area of ​​the first region 316 varies, S1 is based on the minimum flow cross-sectional area of ​​the first region 316. The flow cross-sectional area of ​​the valve port 40a can also vary across different flow cross-sectional areas. For example, when a portion of the valve core 31 is located within the valve port 40a, S2 is based on the minimum flow cross-sectional area of ​​the valve port 40a. The first channel 22 has an opening on the first inner wall 1011a, and the first channel 22 is connected to the first area 316. In the first state, the fluid can enter the valve cavity from the valve port 40a, and then the fluid basically enters the first area 316 radially, and then the fluid enters the first channel 22 from the first area 316.

[0023] When fluid is introduced through the second passage 23, the pressure differential between the second passage 23 and the valve chamber 10a causes the valve core 31 to open the valve port 40a. After passing through the valve port 40a, the fluid enters the first region 316 between the first inner sidewall 1011a and the first outer sidewall 311. Because S1 ≥ S2, the fluid's flow area increases after entering the first region 316, which helps reduce pressure drop. In particular, when the distance between the valve core 31 and the valve port 40 is small, the fluid flows from the valve port 40a through the first region 316. The cross-sectional area between the first inner sidewall 1011a and the first outer sidewall 311 is larger than the cross-sectional area of ​​the valve port 40a, which helps reduce the pressure drop after the fluid is introduced from the valve port 40a, thereby reducing the pressure drop of the one-way valve 1. If the flow area of ​​the first region 316 is smaller than the flow area of ​​the valve port 40a, the fluid will experience a significant instantaneous pressure drop when passing through the valve port 40a. In this case, after passing through the valve port 40a, the fluid will still be in an environment with a smaller flow area, and the pressure drop will not be significantly reduced. Furthermore, the fluid will impact the inner wall of the valve cavity 10a, causing some pressure loss. However, if the flow area of ​​the first region 316 is larger than the flow area of ​​the valve port 40a, the flow area will increase after the fluid passes through the valve port 40a, which helps reduce the pressure drop.

[0024] Furthermore, at least a portion of the first channel 22 is located on the side of the valve body 10. The one-way valve 1 includes a first state. In the first state, the valve port 40a is able to communicate with the first channel 22, and along the radial direction of the valve core 31, at least a portion of the first outer sidewall 311 is opposite the first channel 22. The first state herein refers to a process state during the operation of the valve core 31, and the first state does not include the valve closed state. In the first state, at least a portion of the first outer sidewall 311 of the valve core 31 is opposite the first channel 22, and at least a portion of the first channel 22 is blocked by the valve core 31. After being discharged from the valve port 40a, the fluid passes through the gap between the valve core 31 and the valve port portion 40 and enters the space between the first inner sidewall 1011a and the first outer sidewall 311. The flow cross-sectional area between the first inner sidewall 1011a and the first outer sidewall 311 is larger than the flow cross-sectional area of ​​the valve port 40a, which helps to reduce the pressure drop of the fluid after being discharged from the valve port 40a, thereby reducing the pressure drop of the one-way valve 1.

[0025] Along the axial direction of the valve core 31, the valve port 40a and at least a portion of the first channel 22 are defined to be at the same height, or the valve port 40a and the first channel 22 are spaced apart by a distance L1, L1 ≤ 3 mm. The valve body 10 includes a first wall 103b, and the one-way valve 1 includes a third state. In the third state, the first wall 103b abuts the valve core 31. In this embodiment, the second channel 23 has an opening in the first wall 103b, forming the valve port 40a. In the second state, the valve port 40a communicates with the valve cavity 10a. Optionally, the axial spacing between the first channel 22 and the valve port 40a is as small as possible. However, in actual production, since the first channel 22 is located on the side of the valve body 10, the valve body 10 is made of metal, and the first channel 22 can be machined, the valve port 40a is close to the first channel 22. Machining of the first channel 22 may cause damage to the valve port 40. Therefore, L1 is preferably the minimum value achievable in actual production.

[0026] The valve core 31 includes a guide portion 315. At least a portion of the second outer sidewall 312 is located within the guide portion 315. Along the axial direction of the valve core 31, the first outer sidewall 311 is positioned relative to the guide portion 315, closer to the valve port 40a. Along the axial direction of the valve core 31, the second outer sidewall 312 of the guide portion 315 slidably engages with the first inner sidewall 1011a. The one-way valve 1 includes a second state. In the second state, the valve core 31 abuts the valve port 40. Along the axial direction of the valve core 31, the guide portion 315 is positioned away from the valve port 40a relative to the first passage 22. A gap, namely a first region 316, is defined between the first outer sidewall 311 of the valve core 31 and the first inner sidewall 1011a of the valve body 10. This facilitates fluid flow between this gap, the valve port 40a, and the first passage 22. In the second state of the one-way valve 1, the valve core 31 abuts against the valve mouth portion 40, and along the axial direction of the valve core 31, the guide portion 315 is away from the valve mouth 40a relative to the first channel 22. Even in the valve open state with a small flow rate, the guide portion 315 at this time moves in the direction away from the valve mouth 40a based on the position in the second state, and the fluid can still be discharged through the first area 316 between the first outer wall 311 and the first inner wall 1011a, and the guide portion 315 will not block the first channel 22, which is beneficial to reducing the pressure drop.

[0027] This structure is particularly suitable for small flow environments. When a small amount of fluid passes through the valve port 40a, the distance between the valve port part 40 and the valve core 31 is small. In the height direction, the first wall 103b and the valve core component 30 have a first gap. The valve port 40a and at least part of the first channel 22 are located at the same height position or have a gap. Even if the valve port 40a is opened relatively small, in the height direction, the first outer side wall 311 and at least part of the first channel 22 are still opposite to each other, which is beneficial to reducing fluid pressure loss and pressure drop. In addition, the flow area of ​​the first region 316 is larger than the flow area of ​​the valve port 40a, which is beneficial to reducing the pressure loss caused by the fluid impacting the inner wall of the valve cavity 10a and reducing the pressure drop.

[0028] It should be noted that, assuming that the gap between the valve port 40a and the valve core component 30 is within a first height range, and the first channel 22 is within a second height range, along the height direction, the first height range and the second height range intersect. The height direction here refers to the axial direction of the valve body 10, which is only used to refer to the relative position and does not limit the specific structure. It should be noted that the valve body 10 here can be a cylinder or other irregular structure, but this does not affect the definition of the axial direction. The low flow environment here is used to illustrate the situation where the gap between the valve core 31 and the valve port 40 is small. Usually, the flow rate of low flow is less than 100kg / h.

[0029] The flow cross-sectional area of ​​the first channel 22 is defined as S3, where S3 ≥ S2. After the fluid enters the valve chamber 10a, it is discharged from the first channel 22. Since the flow cross-sectional area of ​​the first channel 22 is greater than or equal to the flow cross-sectional area of ​​the valve port 40a, the pressure drop generated after the fluid is discharged from the valve port 40a to the first channel 22 is reduced. Optionally, when the flow cross-sectional area of ​​the first channel 22 is greater than the flow cross-sectional area of ​​the valve port 40a, the cross-sectional area of ​​the fluid flowing through the valve port 40a after entering the first channel 22 increases, which helps to further reduce the pressure drop. It should be noted that the flow cross-sectional area here refers to the intersection of a plane perpendicular to the fluid flow direction and the wall of the channel containing the fluid, with the fluid flow direction as a reference. In this embodiment, the flow cross-sectional areas of the first region 316, the valve port 40a, and the first channel 22 are referenced to the minimum flow cross-sectional area allowed for fluid passage in each region. In other embodiments, this reference method is included but is not limited to the above.

[0030] Furthermore, in the third state, the valve core 31 abuts against the valve mouth portion 40, and along the axial direction of the valve body 10, the second outer side wall 312 is away from the valve mouth 40a relative to the wall defining the first channel 22, that is, along the axial direction of the valve core 31, the second outer side wall 312 and the wall of the first channel 22 are staggered. Since at least part of the second outer side wall 312 abuts against or has a clearance fit with the first inner side wall 1011a, the second outer side wall 312 will not block the first channel 22. Even if the valve is opened at a small flow rate, the fluid can be discharged through the first area 316 between the first inner side wall 1011a and the second outer side wall 312, and the flow cross-sectional area of ​​the first area 316 is larger than the flow cross-sectional area of ​​the valve mouth 40a, which is beneficial to reduce the pressure drop after the fluid enters the first area 316.

[0031] 2 , 5 , and 6 , the valve body 10 includes a first component 101 and a second component 102. The first component 101 and the second component 102 are fixedly connected, with at least a portion of the first inner sidewall 1011a located in the second component 102. The one-way valve 1 includes a recessed portion 1021 and a mating portion 1022. One of the recessed portion 1021 and the mating portion 1022 is located in the first component 101, and the other of the recessed portion 1021 and the mating portion 1022 is located in the second component 102. In the radial direction of the valve body 10, the recessed portion 1021 is recessed relative to the outer sidewall of the valve body 10. The one-way valve 1 includes a wall portion 1011. When the one-way valve 1 is used in a fluid control assembly 50, the fluid control assembly 50 includes a mounting portion 51. The wall portion 1011 can be connected to the mounting portion 51. The first component 101 is a one-piece structure. The first component 101 and the wall portion 1011 can be integrally formed by machining. In other embodiments, the first component 101 can also be formed by other molding methods. Furthermore, the groove portion 1021 is annular, and at least a portion of the mating portion 1022 is located in the groove formed by the groove portion 1021. Along the radial direction of the valve body 10, at least a portion of the mating portion 1022 and the groove portion 1021 are transitionally fitted or interference fit to improve the coaxiality of the first component 101 and the second component 102 during assembly.

[0032] The recessed portion 1021 includes a land portion 1021a, a transition section 1021b, and a guide section 1021c. Along the axial direction of the valve body 10, the transition section 1021b is located between the land portion 1021a and the guide section 1021c. At least a portion of the mating portion 1022 abuts the land portion 1021a, while at least a portion of the mating portion 1022 forms a transitional fit or interference fit with the transition section 1021b. Along the radial direction of the valve body 10, a gap exists between the guide section 1021c and the mating portion 1022. Due to the positional relationship between the recessed portion 1021 and the first and second components 101, 102, the guide section 1021c extends to the end surfaces of the first and second components 101, 102. The land portion 1021a abuts the mating portion 1022 to limit the axial position of the first and second components 101, 102. Transition section 1021b connects platform section 1021a and guide section 1021c. Along the radial direction of valve body 10, guide section 1021c is closer to the axis of valve core 31 than transition section 1021b. Guide section 1021c has an inclined surface that connects to transition section 1021b. Along the radial direction of valve body 10, a gap exists between guide section 1021c and mating portion 1022, enabling quick assembly of groove portion 1021 and mating portion 1022. Along the radial direction of valve body 10, at least a portion of mating portion 1022 forms a transition fit or interference fit with transition section 1021b. Transition section 1021b and mating portion 1022 can be assembled by press-fitting or other methods.

[0033] Because the first component 101 and the second component 102 have a transition fit or interference fit, the first component 101 and the second component 102 can be assembled by press-fitting. To improve reliability, the first component 101 and the second component 102 can be welded after assembly. The first component 101 includes a metal material, and the second component 102 includes a metal material. The first component 101 and the second component 102 are made of the same material to improve the welding quality between the two. Optionally, the metal material can be one or a combination of aluminum alloy, stainless steel, copper, etc. In other embodiments, the first component 101 and the second component 102 include, but are not limited to, the above materials.

[0034] Referring to Figures 1, 2, 6, and 7, the valve body 10 includes a first opening 20 and a second opening 21. The first opening 20 is located on the sidewalls of the first component 101 / second component 102. The first opening 20 has two or more first openings 20a that communicate with the valve cavity 10a. The first openings 20a are spaced apart along the circumference of the valve body 10. The one-way valve 1 includes a first channel 22 and a second channel 23. At least a portion of the first channel 22 is located on the sidewalls of the first component 101 and / or second component 102. The first channel 22 communicates with the valve cavity 10a, and the first openings 20a form at least a portion of the first channel 22. The second opening 21 is located on at least one side of the valve body 10. The second opening 21 has a second opening 21a. At least a portion of the second channel 23 is located on the second component 102, and at least a portion of the second opening 21a is located in the second channel 23. The second channel 23 communicates with the valve cavity 10a, and at least a portion of the valve port 40a is located in the second opening 21. In this embodiment, at least a portion of the first channel 22 is located on a side of the second component 102 . In other embodiments, the first channel 22 may also be located on the first component 101 .

[0035] In this embodiment, the wall portion 1011 is located on the first component 101 , and the one-way valve 1 can be connected to the mounting portion 51 through the first component 101 .

[0036] The valve body 10 includes a raised portion 103 and a bottom wall 103a. In this embodiment, the raised portion 103 and the bottom wall 103a are located on the second component 102. Along the axial direction of the valve body 10, the bottom wall 103a is located between the first opening 20 and the second opening 21. The wall forming the valve cavity 10a includes at least a portion of the bottom wall 103a. Along the axial direction of the valve body 10, the raised portion 103 protrudes toward the valve core 31 relative to the bottom wall 103a. At least a portion of the first wall 103b is located on the raised portion 103. The valve core component 30 includes a sealing member 33. Along the axial direction of the valve body 10, the sealing member 33 can abut against the raised portion 103. At least a portion of the valve port 40 is located on the raised portion 103. The raised portion 103 abuts against the seal 33 to form an end face seal, which is conducive to providing a stable sealing method. The raised portion 103 is formed on the second component 102, and the second component 102 can be formed by machining. Compared with general sealing structures, the processing difficulty of the end face seal is lower.

[0037] The one-way valve 1 includes a third state and a second state. In the third state, the valve core 31 and the valve port 40a portion 40 are in contact with each other, the first channel 22 is connected to the valve cavity 10a, and the second channel 23 is not connected to the valve cavity 10a, that is, the valve is in a closed state; in the second state, compared with the third state, the valve core 31 is further away from the valve port 40a, the first channel 22 is connected to the valve cavity 10a, and the second channel 23 is connected to the valve cavity 10a, that is, the valve is in a closed state.

[0038] 2 and 6 , the valve body 10 includes a top wall 1012b, which is a wall forming the valve cavity 10a. In the second state, the valve core 31 abuts the top wall 1012b. Along the axial direction of the valve core 31, the first outer wall 311 is away from the valve port 40a relative to the first channel 22, or a portion of the first outer wall 311 is opposite the first channel 22. When the portion of the first outer wall 311 is opposite the first channel 22, the height dimension of the first outer wall 311 relative to the first channel 22 along the axial direction of the valve core 31 is defined as L2, and the dimension of the first channel 22 along the axial direction of the valve core 31 is L0, where L2 ≤ 1 / 4 * L0. That is, in the second state, along the axial direction of the valve core 31, the first outer wall 311 and the first channel 22 are at least partially offset, i.e., not within the same height range, which helps reduce obstruction of the first channel 22 by the first outer wall 311. It should be noted that the second state here refers to the maximum valve opening state. In the maximum valve opening state, the obstruction of the first channel 22 is minimized as much as possible, which is conducive to reducing the pressure drop; the axial size of the first channel 22 in the valve core 31 refers to the axial direction of the valve core 31, which limits the inner wall size of the first channel 22. When the first channel 22 is a circular hole, the axial size is the aperture.

[0039] The valve chamber 10a includes a first chamber 100b and a second chamber 100c. The first chamber 100b and the second chamber 100c are located on opposite sides of the valve core 31. The second chamber 100c is located on the side of the valve core 31 closer to the valve port 40a than the first chamber 100b. The walls defining the second chamber 100c include a first wall 103b and a bottom wall 103a. The volumes of the first and second chambers 100b and 100c change with the movement of the valve core 31. The elastic member 32 is located in the first chamber 100b.

[0040] The valve body 10 includes a raised portion 103 and a bottom wall 103a. The wall defining the valve cavity 10a includes at least a portion of the bottom wall 103a. In this embodiment, the raised portion 103 and the bottom wall 103a are located on the second component 102. Along the axial direction of the valve body 10, the raised portion 103 protrudes relative to the bottom wall 103a toward the valve core 31. The valve core component 30 includes a sealing member 33 and a stopper 35. Along the axial direction of the valve body 10, the sealing member 33 can abut against the raised portion 103. At least a portion of the valve port 40 is located on the raised portion 103. Along the axial direction of the valve core 31, one side of the sealing member 33 abuts against the valve core 31 and the other side abuts against the stopper 35. The stopper 35 is used to limit the position of the sealing member 33. Because the seal 33 is located on the side of the valve core 31 near the valve port 40a, the first outer wall 311 also includes an outer peripheral wall of the seal 33. Along the axial direction of the valve core 31, the first outer wall 311 is farther from the valve port 40a relative to the first passage 22, or a portion of the first outer wall 311 is opposite the first passage 22. This can reduce the obstruction of the first passage 22 by the valve core component 30, thereby facilitating a reduction in the pressure drop of the one-way valve 1. In this embodiment, the valve core 33 has a convex portion, and at least a portion of the seal 33 and the stopper 35 are sleeved on the convex portion. The clearance between the center hole of the stopper 35 and the valve core 31 can be 0.05 mm to 0.2 mm. By applying axial downward pressure to the convex portion, the end of the convex portion is deformed, and the radial dimension of the end of the convex portion is then larger than the diameter of the center hole of the stopper 35, thereby axially limiting the seal 33 and the stopper 35. The stopper 35 can be a gasket.

[0041] The valve core 31 includes a housing 314. In this embodiment, the housing 314 is recessed relative to the top wall of the valve core 31 to form a cavity. The housing 314 forms part of the wall of the first chamber 100b, and at least a portion of the elastic member 32 is located in the housing 314. The one-way valve 1 has a balancing hole 34, at least partially located in the valve core 31. One end of the balancing hole 34 has an opening in the side wall of the valve core 31, and the other end of the balancing hole 34 has an opening in the housing 314. The balancing hole 34 can connect the first chamber 100b and the second chamber 100c, thereby balancing the pressure in the first chamber 100b and the second chamber 100c. It should be noted that pressure balance here does not mean consistent pressure. The provision of the balancing hole 34 is intended to reduce the pressure difference between the first chamber 100b and the second chamber 100c.

[0042] The present application also discloses a fluid control assembly 50. Referring to Figures 8-10, a mounting portion 51 and the aforementioned one-way valve 1 are schematically shown. The mounting portion 51 has a mounting cavity 51a and a fluid channel 51b. At least a portion of the one-way valve 1 is located in the mounting cavity 51a. The valve body 10 can be connected to the mounting portion 51. Specifically, the first component 101 and / or the second component 102 can be connected and fixed to the mounting portion 51. The one-way valve 1 has a first channel 22 and a second channel 23. At least a portion of the first opening 20a is located in the first channel 22, and at least a portion of the second opening 21a is located in the second channel 23. The wall portion 1011 of the first component 101 is threadedly connected and / or press-fitted to the mounting portion 51. The connection between the wall portion 1011 and the mounting portion 51 can be threaded, press-fitted, or a combination of threading and press-fitting. Other embodiments include, but are not limited to, the aforementioned connection methods.

[0043] At least a portion of the first channel 22 is located on the side of the first component 101 and / or the second component 102, with a portion of the fluid channel 51b communicating with the first channel 22. At least a portion of the second channel 23 is located in the second component 102, with another portion of the fluid channel 51b communicating with the second channel 23. In this embodiment, the first channel 22 is located in the second component 102, and the first component 101 and the second component 102 are integrally structured. In other embodiments, the first channel 22 may also be located in the first component 101, or in both the first component 101 and the second component 102, without specific limitation herein.

[0044] The fluid control assembly 50 further includes a sealing portion 52, a first press-fit wall 53, and a second press-fit wall 54. The first press-fit wall 53 is located on the first component 101. The wall 1011 includes a connecting portion 1011b. In the radial direction of the valve body 10, the first press-fit wall 53 is located away from the valve port 40a relative to the connecting portion 1011b of the wall 1011. The first press-fit wall 53, top wall 1012b, and wall 1011 form an integral structure, while the connecting portion 1011b of the wall 1011 is fixedly connected to the mounting portion 51. When the first press-fit wall 53 and wall 1011 are separate structures, the sealing portion 52 is located between the first press-fit wall 53 and the second press-fit wall 54. The sealing portion 52 exerts a force on the first press-fit wall 53 of the valve body 10 away from 40a. Furthermore, the wall 1011 is fixedly connected to the mounting portion 51. This causes the force applied to the valve body 10 to exert two opposing forces on the separate structures, making it easier for fluid to leak between the separate structures. Therefore, the first press-fit wall 53 and the wall portion 1011 are an integrated structure, which can reduce leakage.

[0045] In some embodiments, the connecting portion 1011b can be a threaded portion, and the wall portion 1011 is threadedly connected to the mounting portion 51 via the threaded portion. The threads of the connecting portion 1011b and the mounting portion 51 cooperate with each other, and the first component 101 can be limited in the axial direction, so that the sealing portion 52 cooperates more tightly with the first press-fit wall 53 and the second press-fit wall 54. Compared with the first press-fit wall 53 and the wall portion 1011 being a separate structure, the first press-fit wall 53 and the wall portion 1011 are an integrated structure, and there is no fitting gap between the two, which is conducive to reducing leakage. In addition, since the sealing portion 52 is far away from the valve port relative to the connecting portion 1011b, the connecting portion 1011b is separated from the external fluid, so that corrosive substances from the outside are difficult to enter the connecting portion 1011b, preventing the threaded portion here from rusting, thereby reducing the connection and sealing effect at the connecting portion 1011b.

[0046] The wall forming the mounting cavity 51a includes a second press-fit wall 54. Along the axial direction of the one-way valve 1, at least a portion of the sealing portion 52 is located between the first press-fit wall 53 and the second press-fit wall 54. The sealing portion 52 is positioned away from the valve port 40a relative to the connecting portion 1011b. The sealing portion 52 is used to reduce fluid leakage from the mounting gap between the one-way valve 1 and the mounting portion 51. The sealing portion 52 includes at least two first abutting portions 52a and at least two second abutting portions 52b. Along the axial direction of the valve body 10, the first abutting portions 52a and the second abutting portions 52b are located on opposite sides of the sealing portion 52. The first abutting portions 52a abut against the first press-fit wall 53, while the second abutting portions 52b abut against the second press-fit wall 54. One side of the sealing portion 52 abuts against the first press-fit wall 53 through multiple first abutting portions 52a, while the other side of the sealing portion 52 abuts against the second press-fit wall 54 through second abutting portions 52b, forming a multi-point seal that helps reduce leakage. As shown in the figure, the sealing portion 52 can be Z-shaped or have other structures, as long as it can achieve the effect of multi-point sealing, especially in the field of high-pressure fluid control such as CO2, it has high sealing performance.

[0047] Along the axial direction of the valve body 10, the first channel 22 is spaced away from the sealing portion 52 relative to the connecting portion 1011b, and along the axial direction of the valve body 10, the second channel 23 is spaced away from the sealing portion 52 relative to the connecting portion 1011b. Since the connecting portion 1011b of the valve body 10 is fixed to the mounting portion 51, fluid leakage from the mounting cavity 51a must pass through the connection between the connecting portion 1011b and the mounting portion 51, and then through the gap between the sealing portion 52 and the first press-fit wall 53 and / or the second press-fit wall 54. This connection can partially reduce leakage. The first channel 22 and the second channel 23 are spaced away from the sealing portion 52 relative to the connecting portion 1011b, which further reduces fluid leakage.

[0048] The sealing portion 52 is made of metal, the mounting portion 51 is made of metal, and the first component 101 is made of metal. The first press-fit wall 53 of the first component 101 and the connecting portion 1011b of the first component 101 are integrally formed. The sealing portion 52 can be formed by machining. The use of high-strength materials in the field of high-pressure fluid control improves sealing effectiveness and extends the service life of the sealing portion 52.

[0049] The first component 101 of the one-way valve 1 is threadedly connected or press-fitted to the mounting portion 51, and the sealing portion 52 reduces leakage, facilitating rapid assembly of the fluid control assembly 50. Furthermore, when the first component 101 and the mounting portion 51 are connected, the sealing portion 52 is compressed, thereby reducing leakage from the one-way valve 1. The drawings only illustrate the first press-fit wall 53 located on the first component 101, but actual components include but are not limited to this structure.

[0050] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A one-way valve (1), characterized in that: The one-way valve (1) comprises a valve body (10) and a valve core component (30), wherein the one-way valve (1) has a valve cavity (10a), at least a portion of the valve core component (30) is located in the valve cavity (10a), the valve core component (30) comprises a valve core (31), and the one-way valve (1) comprises a valve port portion (40), and along the axial direction of the valve core (31), the valve core (31) can move to close the valve port (40a) of the valve port portion (40); The wall forming the valve cavity (10a) includes a first inner wall (1011a), and the valve core (31) includes a first outer wall (311), defining a first area (316). When the valve core (31) is in a state of closing the valve port (40a), along the radial direction of the valve core (31), the first area (316) is located between the first inner wall (1011a) and the first outer wall (311); the one-way valve (1) includes a first state. When the one-way valve (1) is in the first state, the first area (316) is connected to the valve port (40a), and the flow cross-sectional area of ​​the first area (316) is S1, and the flow cross-sectional area of ​​the valve port (40a) is defined as S2, and S1≥S2.

2. The one-way valve (1) according to claim 1, characterized in that: The one-way valve (1) has a first channel (22), at least part of which is located on the side of the valve body (10); in the first state, the first area (316) is connected to the valve port (40a) and the first channel (22); along the radial direction of the valve core (31), at least part of the first outer side wall (311) is opposite to the first channel (22).

3. The one-way valve (1) according to claim 1 or 2, characterized in that: The one-way valve (1) has a first channel (22), at least part of which is located on the side of the valve body (10), and the first channel (22) is connected to the valve cavity (10a), and the flow cross-sectional area of ​​the first channel (22) is defined as S3, S3 ≥ S2.

4. The one-way valve (1) according to claim 3, characterized in that: Along the axial direction of the valve core (31), the valve port (40a) and at least part of the first channel (22) are at the same height position, or the valve port (40a) and the first channel (22) have a spacing L1, L1≤3mm.

5. The one-way valve (1) according to any one of claims 1 to 4, characterized in that: The valve body (10) comprises a top wall (1012b), and a wall forming the valve cavity (10a) comprises the top wall (1012b). The one-way valve (1) comprises a second state. In the second state, the valve core (31) abuts against the top wall (1012b). The one-way valve (1) comprises a first channel (22). At least part of the first channel (22) is located at a side of the valve body (10). Along the axial direction of the valve core (31), the first outer side wall (311) is located relative to the valve core (31). The first channel (22) is away from the valve port (40a), or a portion of the first outer side wall (311) is opposite to the first channel (22). When a portion of the first outer side wall (311) is opposite to the first channel (22), a height dimension of the first outer side wall (311) relative to the first channel (22) along the axial direction of the valve core (31) is defined as L2, and a dimension of the first channel (22) in the axial direction of the valve core (31) is L0, and L2≤1 / 4*L0.

6. The one-way valve (1) according to claim 5, characterized in that: The one-way valve (1) includes a third state. In the third state, the valve core (31) abuts against the valve port (40). The valve cavity (10a) includes a first cavity (100b) and a second cavity (100c). The first cavity (100b) and the second cavity (100c) are located on opposite sides of the valve core (31). The second cavity (100c) is located on the side of the valve core (31) close to the valve port (40a). The one-way valve (1) includes an elastic member (32). The elastic member (32) is located in the first cavity (100b). One end of the elastic member (32) abuts against the valve core (31), and the other end of the elastic member (32) abuts against the top wall (1012b). The elastic member (32) can apply a valve closing force to the valve core (31).

7. The one-way valve (1) according to claim 6, characterized in that: The one-way valve (1) has a balancing hole (34), at least a portion of which is located on the valve core (31), and the balancing hole (34) is capable of connecting the first chamber (100b) and the second chamber (100c).

8. The one-way valve (1) according to claim 7, characterized in that: The valve body (10) includes a protruding portion (103) and a bottom wall (103a), and the wall defining the valve cavity (10a) includes at least a portion of the bottom wall (103a). Along the axial direction of the valve body (10), the protruding portion (103) protrudes toward the valve core (31) relative to the bottom wall (103a). The valve core component (30) includes a sealing member (33), and the sealing member (33) is connected to the valve core (31). Along the axial direction of the valve body (10), the sealing member (33) can abut against the protruding portion (103), and at least a portion of the valve mouth portion (40) is located on the protruding portion (103).

9. The one-way valve (1) according to claim 8, characterized in that: The valve body (10) comprises a first component (101) and a second component (102); the one-way valve (1) comprises a groove portion (1021) and a matching portion (1022); one of the groove portion (1021) and the matching portion (1022) is located in the first component (101); the other of the groove portion (1021) and the matching portion (1022) is located in the second component (102); the groove portion (1021) and the matching portion (1022) are press-fitted and fixed.

10. The one-way valve (1) according to claim 9, characterized in that: The groove portion (1021) comprises a step portion (1021a), a transition portion (1021b) and a guide portion (1021c); along the axial direction of the valve body (10), the transition portion (1021b) is located between the step portion (1021a) and the guide portion (1021c); at least a portion of the matching portion (1022) abuts against the step portion (1021a); ​​at least a portion of the matching portion (1022) is transitionally fitted or interference fit with the transition portion (1021b); along the radial direction of the valve body (10), a gap exists between the guide portion (1021c) and the matching portion (1022); according to the positional relationship between the groove portion (1021) and the first component (101) and the second component (102), the guide portion (1021c) extends to the end surface of the first component (101) / the second component (102).

11. A fluid control assembly (50), characterized in that: The one-way valve (1) comprises a mounting portion (51) and a one-way valve (1) according to any one of claims 1 to 10, wherein the mounting portion (51) has a mounting cavity (51a) and a fluid channel (51b), at least part of the one-way valve (1) is located in the mounting cavity (51a), the valve body (10) can be connected to the mounting portion (51), and the one-way valve (1) has a first channel (22) and a second channel (23), wherein a part of the fluid channel (51b) is connected to the first channel (22), and another part of the fluid channel (51b) is connected to the second channel (23).

12. The fluid control assembly (50) according to claim 11, characterized in that: The fluid control component (50) also includes a sealing portion (52), a first press-fit wall (53) and a second press-fit wall (54); the one-way valve (1) includes a wall portion (1011); the wall portion (1011) is connectable to the mounting portion (51); the first press-fit wall (53) and the wall portion (1011) are an integral structure; the wall forming the mounting cavity (51a) includes the second press-fit wall (54); along the axial direction of the one-way valve (1), at least a portion of the sealing portion (52) is located between the first press-fit wall (53) and the second press-fit wall (54); the sealing portion (52) is away from the valve port (40a) relative to the connecting portion (1011b).

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