Valve device

Abstract

Provided in the present application is a valve device, comprising a valve seat component and a valve core portion. The valve device is provided with a valve port. The valve core portion axially moves relative to the valve port. The valve device further comprises a sealing component and an elastic member, wherein the sealing component comprises a main body portion and an extension portion, the elastic member and the main body portion are located between the valve seat component and the valve core portion in a radial direction of the valve device, the elastic member abuts against the main body portion, the main body portion abuts against the valve core portion, the extension portion is located between the valve seat component and the valve core portion, and the extension portion abuts against the valve core portion, thus facilitating an improvement in the coaxiality of the valve core portion and the valve port.

Description

A valve device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 23, 2023, with application number 202311573985.2 and invention name “A Valve Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] The valve core component of the valve device includes a screw rod part and a valve core part. The valve core part is sleeved on the outer periphery of the screw rod part. There is a gap between the inner periphery of the valve core part and the outer periphery of the screw rod part. In the process of the screw rod part driving the valve core part to move axially, the valve core part may undergo radial deflection, affecting the coaxiality between the valve core part and the valve port. Summary of the Invention

[0004] The purpose of the present application is to provide a valve device that is conducive to improving the coaxiality of the valve core and the valve port.

[0005] To achieve the above objectives, one embodiment of the present application adopts the following technical solution:

[0006] A valve device, which includes a valve seat component and a valve core component. The valve seat component has an accommodating cavity, at least part of the valve core component is located in the accommodating cavity, the valve device has a valve port, and the valve core component moves axially relative to the valve port. The valve device also includes a sealing component and an elastic component. The sealing component includes a main body and an extension portion. Along the radial direction of the valve device, the elastic component and the main body are located between the valve seat component and the valve core component, the elastic component and the main body abut against each other, the main body abut against the valve core component, the extension portion is located between the valve seat component and the valve core component, and the extension portion abuts against the valve core component.

[0007] In one embodiment provided by the present application, the valve device includes a valve seat component and a valve core component. The valve seat valve device has a valve port, and the valve core component moves axially relative to the valve port. The valve device also includes a sealing component and an elastic component. The sealing component includes a main body and an extension component. Along the radial direction of the valve device, the elastic component and the main body are located between the valve seat component and the valve core component, the elastic component and the main body are abutted, the main body and the valve core component are abutted, the extension component is located between the valve seat component and the valve core component, and the extension component and the valve core component are abutted; the provision of the extension component in the scheme of the present application increases the length of the sealing component, and the sealing component can play a role of axial guidance and radial limitation on the valve core component, which is beneficial to prevent the valve core component from tilting relative to the valve port, and the extension component can further increase the axial guiding effect of the sealing component on the valve core component, which is beneficial to improving the coaxiality of the valve core component and the valve port. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a schematic perspective structural diagram of a first embodiment of a valve device provided by the present application from one angle;

[0009] FIG2 is a front view of the structure of the valve device in FIG1;

[0010] FIG3 is a schematic cross-sectional view of the valve device along plane AA in FIG2 ;

[0011] FIG4 is a schematic structural diagram of the valve component in FIG3 at an angle;

[0012] FIG5 is a schematic cross-sectional view of the valve component along plane BB in FIG4 ;

[0013] FIG6 is an enlarged structural diagram of portion A in FIG5 ;

[0014] FIG7 is a schematic diagram of the three-dimensional structure of the sealing component in FIG5;

[0015] FIG8 is an enlarged structural diagram of part A in another embodiment of the valve device;

[0016] FIG9 is an enlarged structural diagram of part A in another embodiment of the valve device;

[0017] FIG10 is an enlarged structural diagram of part A of the second embodiment of the valve device;

[0018] FIG11 is an enlarged structural diagram of portion A in the third embodiment of the valve device. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] 1 to 7 , a first embodiment of the valve device 100 is shown. In the present application, the valve device 100 includes an electronic expansion valve, which can be applied to refrigerant systems such as commercial or vehicle thermal management systems or other systems requiring heat management such as battery thermal management, thermal management of electrical devices, etc.

[0021] The valve device 100 includes a valve body 1, a coil assembly 2, and a valve component 3. A portion of the valve component 3 is positioned within the valve body cavity of the valve body 1. The valve component 3 is fixedly connected to the valve body 1 using a threaded connection, while the coil assembly 2 is fixedly connected to the valve body 1 using a screw connection. Of course, in other embodiments, the coil assembly 2 can be fixedly connected to the valve component 3, and then the two can be assembled and then fixedly connected to the valve body 1. In this embodiment, the valve body 1 is a separate valve block. In other embodiments, the valve body 1 can also be part of a system, such as a heat exchanger or a flow channel plate.

[0022] The coil assembly 2 includes a stator assembly 21 and an injection molded body 22. The injection molded body 22 covers at least a portion of the stator assembly 21. The coil assembly 2 has a first accommodating cavity 23, which has an opening in the injection molded body 22 toward the valve body 1. The valve component 3 includes a valve seat component 31, a rotor assembly 32, and a sleeve 33. The lower end of the sleeve 33 is connected to the valve seat component 31 by welding. At least a portion of the sleeve 33 is located in the first accommodating cavity 23, and a portion of the sleeve 33 is located between the rotor assembly 32 and the stator assembly 21. A portion of the rotor assembly 32 is located inside the sleeve 33, and the stator assembly 21 is located outside the sleeve 33. In this embodiment, the valve seat component 31 includes a valve seat portion 4 and a connecting seat 5. The valve seat portion 4 and the connecting seat 5 are fixedly connected. In this embodiment, the valve seat portion 4 and the connecting seat 5 are welded. In other embodiments, the valve seat portion 4 and the connecting seat 5 can also be bonded or threaded.

[0023] 3 and 5 , in this embodiment, the rotor assembly 32 includes a rotor component 321 and a valve core component 322, which are fixedly connected. The valve core component 322 includes a valve core portion 324 and a screw portion 323, which are connected to each other. A predetermined current is applied to the stator assembly 21 to generate an excitation magnetic field, allowing the rotor component 321 to rotate within the excitation magnetic field, thereby driving the screw portion 323 to rotate. In this embodiment, the valve seat portion 4 has a valve port 41, and the screw portion 323 drives the valve core portion 324 to move axially relative to the valve port 41, thereby adjusting the flow area of ​​the valve port 41. For ease of description, the upper and lower directions are defined as the upper and lower directions in the drawings in the specification. The upper and lower directions only represent relative positions. The extension direction of the screw portion 323 is the axial direction of the valve device 100 referred to in this application, and the radial direction is perpendicular to the axial direction.

[0024] In this embodiment, the valve seat component 31 has an accommodating cavity 311, with at least a portion of the valve core portion 324 located in the accommodating cavity 311. The valve core portion 324 is axially movable relative to the valve port 41. The valve device 100 further includes a sealing component 6 and an elastic member 35. The sealing component 6 includes a main body 62 and an extension portion 61. In the radial direction of the valve device 100, the elastic member 35 and the main body 62 are located between the valve seat component 31 and the valve core portion 324, with the elastic member 35 abutting the main body 62, and the main body 62 abutting the valve core portion 324. The extension portion 61 is located between the valve seat component 31 and the valve core portion 324, with the extension portion 61 abutting the valve core portion 324. There is a gap between the valve core 324 and the screw rod 323. When the screw rod 323 drives the valve core 324 to move axially, the valve core 324 may become skewed, affecting the coaxiality between the valve core 324 and the valve port 41. The provision of the extension 61 increases the length of the sealing component 6. The sealing component 6 can axially guide and radially limit the valve core 324, preventing the valve core 324 from skewing relative to the valve port 41. The extension 61 can further enhance the axial guiding effect of the sealing component 6 on the valve core 324, thereby improving the coaxiality between the valve core 324 and the valve port 41. In addition, improving the coaxiality between the valve core 324 and the valve port 41 helps prevent the valve core 324 from colliding with the valve port 41 when closing the valve port 41, thereby improving the service life of the valve device 100 and preventing the valve core 324 from having difficulty closing the valve port 41 due to colliding with the valve port 41. Axial guidance means that when the valve core portion 324 moves axially relative to the sealing component 6, the sealing component 6 guides the valve core portion 324.

[0025] In this embodiment, the valve seat component 31 has a first receiving groove 312, the elastic member 35 is located in the first receiving groove 312, and the sealing component 6 includes a main body 62 and an extension 61. The elastic member 35 and the main body 62 are located between the inner peripheral wall forming the first receiving groove 312 and the valve core 324. The elastic member 35 and the main body 62 abut against each other, and the main body 62 abuts against the valve core 324. The extension 61 is located between the valve seat component 31 and the valve core 324, and the extension 61 abuts against the valve core 324. The sealing component 6 can axially guide and radially limit the valve core 324, preventing the valve core 324 from tilting relative to the valve port 41. The provision of the extension 61 in the application solution increases the length of the sealing component 6, which can further increase the axial guiding effect of the sealing component 6 on the valve core 324, thereby improving the coaxiality of the valve core 324 and the valve port 41. In addition, improving the coaxiality between the valve core portion 324 and the valve port 41 helps control the gap between the valve core portion 324 and the wall forming the valve port 41, thereby controlling the flow rate of the fluid flowing through the valve port 41 and ensuring the flow control accuracy of the valve device 100. In other embodiments, the valve seat component 31 may not be provided with the first receiving groove 312.

[0026] In the present application, the valve device 100 also includes a nut assembly 34, and the nut assembly 34 and the screw rod portion 323 are threadedly matched. Compared with the valve device 100 without the sealing component 6, the valve core portion 324 may deflect relative to the valve port 41. The deflection of the valve core portion 324 may squeeze the nut assembly 34, making the threaded fit between the nut assembly 34 and the screw rod portion 323 not smooth, and the rotational resistance of the screw rod portion 323 relative to the nut assembly 34 becomes larger, and the screw rod portion 323 is prone to jamming, so that the valve device 100 may malfunction. The provision of the sealing component 6 in the present application solution can prevent the valve core portion 324 from deflecting relative to the valve port 41, avoid the deflection of the valve core portion 324 and squeezing the nut assembly 34, thereby preventing the screw rod portion 323 from jamming and ensuring the normal operation of the valve device 100. In the present application, the inner peripheral wall refers to the annular wall on the surface where the inner diameter of the component is located, and the outer peripheral wall refers to the annular wall on the surface where the outer diameter of the component is located.

[0027] 5-7 , the sealing component 6 is sleeved around the outer periphery of the valve core portion 324, with at least a portion of the inner peripheral wall of the sealing component 6 abutting against the outer peripheral wall of the valve core portion 324. In this embodiment, the valve seat portion 4 includes a third portion 42 and a fourth portion 43, with the third portion 42 located above the fourth portion 43. The connecting seat 5 includes a first portion 51 and a second portion 52, with the first portion 51 being farther from the valve seat portion 4 than the second portion 52. The third portion 42 is located within the inner cavity of the second portion 52, and the fourth portion 43 is located below the second portion 52. The fourth portion 43 is closer to the valve port 41 relative to the connecting seat 5. The first portion 51, the second portion 52, and the third portion 42 form a first receiving groove 312.

[0028] In conjunction with Figures 5 to 7, in this embodiment, the valve device 100 further includes an elastic member 35. The elastic member 35 is made of a soft material and can be a sealing ring. The elastic member 35 is located between the sealing component 6 and the valve seat component 31. The sealing component 6 and the elastic member 35 are separate structures, and the sealing component 6 and the elastic member 35 are limitedly connected. The sealing component 6 has a fourth receiving groove 65. The fourth receiving groove 65 is located on the outer peripheral wall of the sealing component 6. Part of the elastic member 35 is located in the fourth receiving groove 65. The inner peripheral portion of the elastic member 35 abuts against the outer peripheral surface forming the fourth receiving groove 65. The elastic member 35 is located in the first receiving groove 312. The outer peripheral portion of the elastic member 35 abuts against the inner peripheral wall forming the first receiving groove 312. The elastic member 35 is in a compressed state. The provision of the elastic member 35 helps improve the seal between the valve seat component 31 and the valve core portion 324, preventing moisture, impurities, etc. from entering the chamber of the coil assembly 2 through the gap between the valve seat component 31 and the valve core portion 324, and preventing moisture, impurities, etc. from corroding the electrical control board 24 of the coil assembly 2, thereby ensuring the normal operation of the valve device 100. In other embodiments, the sealing component 6 and the elastic member 35 can also be fixedly connected, such as by bonding or snapping. In this embodiment, the sealing component 6 is made of a plastic material, including a resin material. It is not ruled out that the sealing component 6 may contain impurities or other specific metal components. The resin material may be, for example, PTFE (Polytetrafluoroethylene), PEK (Polyetheretherketone), or PPS (Polyphenylene sulfide). The elastic member 35 is made of a rubber material. The material of the elastic member 35 is softer than the material of the sealing component 6. It is not ruled out that the elastic member 35 may contain impurities or other specific metal components. The rubber material may be, for example, EPDM (Ethylene Propylene Diene Monomer) or hydrogenated nitrile rubber.

[0029] 5-7 , the sealing component 6 includes an extension portion 61 and a main body portion 62. The sealing component 6 has an extension portion 61 that extends from the first receiving groove 312 toward the valve port 41. The extension portion 61 is located below the main body portion 62, which is located in the first receiving groove 312. The extension portion 61 abuts against the valve seat portion 4. In this embodiment, the outer peripheral wall of the main body portion 62 abuts against the inner peripheral wall of the elastic member 35, and the inner peripheral wall of the main body portion 62 abuts against the outer peripheral wall of the valve core portion 324. The extension portion 61 is located between the valve seat portion 4 and the valve core portion 324 of the valve seat component 31. The inner peripheral wall of the extension portion 61 abuts against the outer peripheral wall of the valve core portion 324, and the outer peripheral wall of the extension portion 61 abuts against the inner peripheral wall of the valve seat portion 4. The provision of the sealing component 6 can guide the axial movement of the valve core portion 324 relative to the valve port 41. Furthermore, the provision of the sealing component 6 can also radially limit the valve core portion 324. In particular, the provision of the main body 62 can prevent the valve core portion 324 from tilting relative to the valve port 41, thereby improving the coaxiality of the valve core portion 324 and the valve port 41. Furthermore, the sealing component 6 extends between the inner circumferential wall of the valve seat portion 4 and the inner circumferential wall of the valve core portion 324, thereby increasing the length of the sealing component 6 guiding the valve core portion 324 and further improving the coaxiality of the valve core portion 324 and the valve port 41.

[0030] In this embodiment, the sealing component 6 is made of plastic and can deform when squeezed. The extension 61 of the sealing component 6 abuts the inner circumferential wall of the third portion 42, and a gap is provided between the outer circumferential wall of the extension 61 and the inner circumferential wall of the fourth portion 43. When the valve core portion 324 tilts relative to the sealing component 6, the valve core portion 324 faces a large resistance to movement, and the valve core portion 324 may become stuck. There is a gap between the outer circumferential wall of the extension 61 and the inner circumferential wall of the fourth portion 43, and the sealing component 6 can deform. When the valve core portion 324 tilts relative to the sealing component 6, the valve core portion 324 squeezes the sealing component 6, but the valve core portion 324 can still move. The application solution is conducive to preventing the valve core portion 324 from getting stuck.

[0031] The wall forming the first accommodating groove 312 includes a first upper wall 3121. The first upper wall 3121 is the upper wall forming the first accommodating groove 312. The first upper wall 3121 is the bottom wall of the first part 51. In this embodiment, the elastic member 35 limits the sealing component 6 to the valve core part 324, and the upper end of the main body part 62 and the first upper wall 3121 do not abut against each other. In this way, when the valve core part 324 moves axially, the sealing component 6 can follow the valve core part 324 to have a certain degree of axial movement, and the sealing component 6 has a certain upper and lower activity space.

[0032] In other embodiments, the upper end of the main body 62 may also abut against the first upper wall 3121, thereby providing an axial limit for the sealing component 6 and preventing movement of the sealing component 6 during the sliding movement of the valve core 324 relative to the sealing component 6. The abutment between the main body 62 and the first upper wall 3121 may also facilitate positioning of the sealing component 6 when installed on the connecting seat 5.

[0033] In this embodiment, the valve core portion 324 includes a valve core 3241 and a valve core sleeve 3242. The valve core sleeve 3242 is sleeved around the outer periphery of the screw portion 323. The valve core sleeve 3242 and the valve core 3241 are fixedly connected. In this embodiment, the valve core sleeve 3242 and the valve core 3241 are welded. In other embodiments, the valve core sleeve 3242 and the valve core 3241 can also be bonded. In other embodiments, the valve core sleeve 3242 and the valve core 3241 can also be an integral structure, with the valve core sleeve 3242 and the valve core 3241 being integrally formed.

[0034] 6 , in this embodiment, the sealing component 6 has a groove 64. The groove 64 is arranged around the inner peripheral wall of the sealing component 6, and a gap is formed between the inner peripheral wall of the groove 64 and the outer peripheral wall of the valve core 3241. This arrangement is conducive to reducing the contact area between the sealing component 6 and the valve core 3241, thereby reducing frictional resistance. One or more grooves 64 can be provided. When there are multiple grooves 64, each groove 64 is arranged at a certain distance and is a certain distance away from the upper and lower outer edges of the sealing component 6. This arrangement is conducive to improving the life of the sealing component 6. The groove 64 is not provided at the position where the sealing component 6 and the elastic member 35 are radially opposite. At this position, the sealing component 6 and the outer peripheral wall of the valve core 324 abut each other. Oil can also be added to the groove 64 to play a lubricating role, further reducing the friction between the sealing component 6 and the valve core 3241. In other embodiments, the sealing component 6 may also not have the groove 64, and the inner circumferential wall of the sealing component 6 and the outer circumferential wall of the valve core portion 324 are arranged in contact with each other. This can increase the contact area between the inner circumferential wall of the sealing component 6 and the outer circumferential wall of the valve core 3241, which is beneficial to improving the guiding effect of the sealing component 6 on the valve core 3241.

[0035] In other embodiments, the valve seat portion 4 may also be located below the connecting seat 5 , with the valve seat portion 4 being closer to the valve port 41 relative to the connecting seat 5 , and the first accommodating groove 312 being located between the valve seat portion 4 and the connecting seat 5 .

[0036] In other embodiments, the sealing component 6 and the elastic member 35 may be integrally formed, with the elastic member 35 being made of rubber and the sealing component 6 being made of plastic. The elastic member 35 is secured to the sealing component 6 by a vulcanization process, and the elastic member 35 is positioned between the sealing component 6 and the valve seat component 31. Injection molding the elastic member 35 with the sealing component 6 as an insert further reduces the number of parts, facilitating assembly of the valve device 100, and also achieving a seal between the valve seat component 31 and the valve core 3241.

[0037] 8 , in another embodiment, the valve device 100 is further provided with a second sealing component 7, which is located in the inner cavity of the valve core 3241. In this embodiment, the second sealing component 7 is located between the valve core 3241 and the screw portion 323. The second sealing component 7 is close to the valve port 41 relative to the valve core sleeve 3242, that is, the second sealing component 7 is located below the valve core sleeve 3242. The outer peripheral wall of the second sealing component 7 abuts the inner peripheral wall of the valve core 3241, and the inner peripheral wall of the second sealing component 7 abuts the outer peripheral wall of the screw portion 323. The second sealing component 7 also serves as a guide, further preventing the valve core 3241 from tilting relative to the valve port 41, thereby improving the coaxiality of the valve core 3241 and the valve port 41.

[0038] In this embodiment, the sealing component 6 may also be provided with a groove 64, which is located on the outer peripheral wall of the sealing component 6. The groove 64 is provided to reduce the friction between the valve core 3241 and the sealing component 6. In this embodiment, the elastic member 35 is located in the first receiving groove 312. The elastic member 35 is provided to improve the sealing between the valve seat portion 4 and the connecting seat 5.

[0039] Referring to Figure 9, in another embodiment, compared to the first embodiment, the valve seat component 31 further includes a second receiving groove 44. The second receiving groove 44 is located in the valve seat portion 4, the first receiving groove 312 is located above the second receiving groove 44, the main body 62 is located in the first receiving groove 312, and the extension portion 61 is located in the second receiving groove 44. The inner peripheral wall of the extension portion 61 abuts the outer peripheral wall of the valve core portion 324, and the outer peripheral wall of the extension portion 61 abuts the inner peripheral wall forming the second receiving groove 44. This can also improve the coaxiality between the valve core portion 324 and the valve port 41. The upper end of the sealing component 6 can abut the first upper wall 3121 forming the first receiving groove 312. The wall forming the second receiving groove 44 includes a first lower wall 3122. The lower end of the sealing component 6 can abut the first lower wall 3122 forming the second receiving groove 44. This serves to axially limit the sealing component 6, helping to prevent axial movement of the sealing component 6 during the sliding movement of the valve core 3241 relative to the sealing component 6.

[0040] 5 and 10 , in the second embodiment of the valve device 100, compared to the first embodiment of the valve device 100, the extension portion 61 extends upward from the main body 62. The extension portion 61 is located between the connecting seat 5 and the valve core 3241, and the sealing component 6 is not located between the valve seat portion 4 and the valve core 3241. In this embodiment, the sealing component 6 has an extension portion 61, which is located farther away from the valve port 41 relative to the main body 62. The valve seat component 31 also includes a third receiving groove 521. The first receiving groove 312 is located below the third receiving groove 521. The main body 62 is located in the first receiving groove 312, and the extension portion 61 is located in the third receiving groove 521. The outer peripheral wall of the extension portion 61 abuts the inner peripheral wall forming the third receiving groove 521, and the inner peripheral wall of the extension portion 61 abuts the outer peripheral wall of the valve core portion 324. In this way, the sealing member 6 can also guide the valve core 3241, improving the coaxiality between the valve core 3241 and the valve port 41, and helping to prevent the valve core 3241 from tilting relative to the valve port 41. If the valve core 3241 tilts relative to the valve port 41, it will be difficult for the valve core 3241 to close the valve port 41. The provision of the sealing member 6 also helps to ensure the closure of the valve port 41. The sealing member 6 extends into the third receiving groove 521, thereby increasing the length of the sealing member 6 guiding the valve core 3241.

[0041] In this embodiment, the connecting seat 5 includes a first portion 51 and a second portion 52, with the first portion 51 located above the second portion 52. A third receiving groove 521 is located in the second portion 52, and the extension portion 61 is located between the inner circumferential wall of the second portion 52 and the outer circumferential wall of the valve core 3241. The outer circumferential wall of the extension portion 61 abuts the inner circumferential wall of the second portion 52. In this embodiment, the extension portion 61 is located in the third receiving groove 521, and the outer circumferential wall of the extension portion 61 abuts the inner circumferential wall forming the third receiving groove 521. The main body 62 of the sealing component 6 is located in the first receiving groove 312 of the valve seat component 31.

[0042] In this embodiment, the sealing component 6 also has a groove 64 to reduce the contact area between the sealing component 6 and the valve core 324, thereby reducing the friction between the sealing component 6 and the valve core 3241. In other embodiments, the sealing component 6 may not have the groove 64 to ensure that the sealing component 6 guides the valve core 3241. Multiple grooves 64 may be provided.

[0043] In this embodiment, the valve device 100 also includes an elastic member 35 . The elastic member 35 has been described in detail in the first embodiment and will not be described again here.

[0044] In conjunction with Figures 5 and 11, in a third embodiment of the valve device 100, the sealing component 6 has two extensions 61, one of which extends downward from the main body 62, and the other extends upward from the main body 62. This third embodiment is a combination of the first and second embodiments. In this embodiment, the main body 62 is located between the two extensions 61, which are located above and below the main body 62, respectively. The two extensions 61 and the main body 62 form an integral structure. The valve seat component 31 also includes a third receiving groove 521, which is located above the first receiving groove 312. The extension 61, which is positioned above the main body 62, is located in the third receiving groove 521. The inner peripheral wall of the extension 61 abuts the outer peripheral wall of the valve core portion 324, and the outer peripheral wall of the extension 61 abuts the inner peripheral wall forming the third receiving groove 521. In this embodiment, the third receiving groove 521 is located in the second portion 52 and has an opening toward the valve core 3241. The outer peripheral wall of the extension portion 61 abuts the inner peripheral wall forming the third receiving groove 521, and at least a portion of the inner peripheral wall of the extension portion 61 abuts the outer peripheral wall of the valve core 3241. In this embodiment, the extension portion 61, positioned lower than the main body portion 62, is located between the valve seat portion 4 and the valve core portion 324. The inner peripheral wall of the extension portion 61 abuts the outer peripheral wall of the valve core portion 324, and the outer peripheral wall of the extension portion 61 abuts the inner peripheral wall of the valve seat portion 4. Compared to the first and second embodiments, the sealing member 6 in this embodiment is longer, thereby enhancing its guiding effect on the valve core 3241 and further ensuring the coaxiality between the valve core 3241 and the valve port 41. The sealing component 6 extends upward to the third accommodating groove 521 and downward to between the inner peripheral wall of the valve seat portion 4 and the inner peripheral wall of the valve core 3241 , which can further increase the guiding effect length of the sealing component 6 on the valve core 3241 .

[0045] In this embodiment, the sealing component 6 also has a groove 64 to reduce the contact area between the sealing component 6 and the valve core 3241, thereby reducing the friction between the sealing component 6 and the valve core 3241. In other embodiments, the sealing component 6 may not have the groove 64 to ensure that the sealing component 6 guides the valve core 3241. Multiple grooves 64 may be provided.

[0046] In this embodiment, the valve device 100 also includes an elastic member 35 . The elastic member 35 has been described in detail in the first embodiment and will not be described again here.

[0047] In other embodiments, the valve seat component 31 may further include a first receiving groove 312, a third receiving groove 521, and a second receiving groove 44. The first receiving groove 312 is located between the third receiving groove 521 and the second receiving groove 44, and the third receiving groove 521 is located above the first receiving groove 312. The main body 62 is located in the first receiving groove 312, the extension 61 located above the main body 62 is located in the third receiving groove 521, and the extension 61 located below the main body 62 is located in the second receiving groove 44. This can also improve the coaxiality between the valve core 3241 and the valve port 41. The upper end of the sealing component 6 can abut against the first upper wall 3121 forming the first receiving groove 312. The wall forming the second receiving groove 44 includes a first lower wall 3122. The lower end of the sealing component 6 can abut against the first lower wall 3122 forming the second receiving groove 44. This can serve as an axial limit for the sealing component 6, helping to prevent axial movement of the sealing component 6 during the sliding movement of the valve core 3241 relative to the sealing component 6.

[0048] 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 valve device (100), characterized in that: The valve device (100) comprises a valve seat component (31) and a valve core portion (324); the valve seat component (31) has a receiving cavity (311), at least a portion of the valve core portion (324) is located in the receiving cavity (311); the valve device (100) has a valve port (41), the valve core portion (324) moves axially relative to the valve port (41); the valve device (100) further comprises a sealing component (6) and an elastic member (35); the sealing component (6) comprises a main body portion (62) and an extension portion (61), the extension portion (61) is relatively The main body (62) extends along the axial direction of the valve core portion (324). Along the radial direction of the valve device (100), the elastic member (35) and the main body (62) are located between the valve seat member (31) and the valve core portion (324), the elastic member (35) and the main body (62) are in abutment with each other, the main body (62) and the valve core portion (324) are in abutment with each other, and the extension portion (61) is located between the valve seat member (31) and the valve core portion (324), and the extension portion (61) and the valve core portion (324) are in abutment with each other.

2. The valve device (100) according to claim 1, characterized in that The valve seat component (31) has a first receiving groove (312), the elastic member (35) is located in the first receiving groove (312), the elastic member (35) and the main body (62) are located between the inner peripheral wall forming the first receiving groove (312) and the valve core portion (324), the valve seat component (31) includes a connecting seat (5) and a valve seat portion (4), at least part of the valve seat portion (4) is located below the connecting seat (5), the connecting seat (5) and the valve seat portion (4) are separately arranged, and the connecting seat (5) and the valve seat portion (4) are fixedly connected; The extension portion (61) extends from the main body portion (62) toward the valve port (41), and the extension portion (61) abuts against the valve seat portion (4); and / or the extension portion (61) extends from the first accommodating groove (312) away from the valve port (41), and the extension portion (61) abuts against the connecting seat (5).

3. The valve device (100) according to claim 1 or 2, characterized in that: The sealing component (6) has an extension portion (61), and the extension portion (61) is close to the valve port (41) relative to the main body portion (62). The main body portion (62) is located in the first accommodating groove (312) of the valve seat component (31), and the outer peripheral wall of the main body portion (62) abuts against the inner peripheral wall of the elastic member (35), and the inner peripheral wall of the main body portion (62) abuts against the outer peripheral wall of the valve core portion (324). The extension portion (61) is located between the valve seat portion (4) of the valve seat component (31) and the valve core portion (324), and the inner peripheral wall of the extension portion (61) abuts against the outer peripheral wall of the valve core portion (324), and the outer peripheral wall of the extension portion (61) abuts against the inner peripheral wall of the valve seat portion (4).

4. The valve device (100) according to claim 2 or 3, characterized in that: The valve seat component (31) also includes a second accommodating groove (44), the first accommodating groove (312) is located above the second accommodating groove (44), the main body (62) is located in the first accommodating groove (312), the extension portion (61) is located in the second accommodating groove (44), the inner peripheral wall of the extension portion (61) abuts against the outer peripheral wall of the valve core portion (324), and the outer peripheral wall of the extension portion (61) abuts against the inner peripheral wall forming the second accommodating groove (44).

5. The valve device (100) according to claim 3 or 4, characterized in that: The sealing component (6) has two extension parts (61), and the main body (62) is located between the two extension parts (61). The valve seat component (31) also includes a third accommodating groove (521), and the third accommodating groove (521) is located above the first accommodating groove (312). The extension part (61) arranged above the main body (62) is located in the third accommodating groove (521), and the inner peripheral wall of the extension part (61) abuts against the outer peripheral wall of the valve core part (324). The outer peripheral wall of the extension part (61) abuts against the inner peripheral wall forming the third accommodating groove (521). The extension part (61) arranged below the main body (62) is located between the valve seat part (4) and the valve core part (324).

6. The valve device (100) according to claim 2, characterized in that The sealing component (6) has an extension portion (61), and the extension portion (61) is away from the valve port (41) relative to the main body (62). The valve seat component (31) also includes a third accommodating groove (521), the first accommodating groove (312) is located below the third accommodating groove (521), the main body (62) is located in the first accommodating groove (312), the extension portion (61) is located in the third accommodating groove (521), the outer peripheral wall of the extension portion (61) abuts against the inner peripheral wall forming the third accommodating groove (521), and the inner peripheral wall of the extension portion (61) abuts against the outer peripheral wall of the valve core portion (324).

7. The valve device (100) according to any one of claims 2 to 6, characterized in that: The sealing component (6) has a groove (64), and the groove (64) is arranged around the inner peripheral wall of the sealing component (6), forming a gap between the inner peripheral wall of the groove (64) and the outer peripheral wall of the valve core part (324).

8. The valve device (100) according to claim 7, characterized in that The sealing component (6) and the elastic component (35) are separate structures, the sealing component (6) and the elastic component (35) are position-limitingly connected or fixedly connected, and the elastic component (35) is in a compressed state.

9. The valve device (100) according to claim 7, characterized in that The sealing component (6) and the elastic component (35) are an integrated structure; the elastic component (35) is made of a rubber material, the sealing component (6) is made of a plastic material, and the elastic component (35) is fixed to the sealing component (6) by a vulcanization process.

10. The valve device (100) according to claim 8, characterized in that The sealing component (6) has a fourth receiving groove (65), and the fourth receiving groove (65) is located on the outer peripheral wall of the sealing component (6). Part of the elastic member (35) is located in the fourth receiving groove (65), and the inner peripheral portion of the elastic member (35) abuts against the outer peripheral surface forming the fourth receiving groove (65).

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