Valve device

Abstract

The valve device comprises a valve seat part and a valve element part, the valve seat valve device is provided with a valve port, the valve element part axially moves relative to the valve port, the valve device further comprises a sealing part and an elastic part, the sealing part comprises a main body part and an extending part, and the elastic part and the main body part are located between the valve seat part and the valve element part in the radial direction of the valve device. The elastic piece abuts against the main body part, the main body part abuts against the valve element part, the extending part is located between the valve seat component and the valve element part, the extending part abuts against the valve element part, and therefore the coaxiality of the valve element part and the valve port can be improved.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a valve device. Background Art

[0002] The valve core component of the valve device includes a screw part and a valve core part. The valve core part is sleeved on the outer periphery of the screw part. There is a gap between the inner periphery of the valve core part and the outer periphery of the screw part. During the process of the screw 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

[0003] The purpose of the present application is to provide a valve device, which is conducive to improving the coaxiality of the valve core and the valve port.

[0004] To achieve the above purpose, an implementation method of the present application adopts the following technical solution:

[0005] A valve device, the valve device comprises a valve seat component and a valve core portion, the valve seat component has an accommodating cavity, at least part of the valve core portion is located in the accommodating cavity, the valve device has a valve port, the valve core portion moves axially relative to the valve port, the valve device further comprises a sealing component and an elastic component, the sealing component comprises a main body portion and an extension portion, along the radial direction of the valve device, the elastic component and the main body portion are located between the valve seat component and the valve core portion, the elastic component and the main body portion are abutted, the main body portion and the valve core portion are abutted, the extension portion is located between the valve seat component and the valve core portion, and the extension portion and the valve core portion are abutted.

[0006] 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 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 are abutted, the main body and the valve core component are abutted, the extension portion is located between the valve seat component and the valve core component, and the extension portion and the valve core component are abutted. The provision of the extension portion in the scheme of the present application increases the length of the sealing component, and the sealing component can play a role of axially guiding and radially limiting the valve core component, which is beneficial to preventing the valve core component from tilting relative to the valve port, and the extension portion 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

[0007] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of the valve device provided by the present application at one angle;

[0008] Figure 2 yes Figure 1A schematic diagram of the front view of the structure of the middle valve device;

[0009] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle valve device along the AA plane;

[0010] Figure 4 yes Figure 3 A schematic structural diagram of the middle valve component at one angle;

[0011] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle valve component along the BB plane;

[0012] Figure 6 yes Figure 5 The enlarged structural diagram of the middle A part;

[0013] Figure 7 yes Figure 5 A schematic diagram of the three-dimensional structure of the middle sealing component;

[0014] Figure 8 is an enlarged structural schematic diagram of part A in another embodiment of the valve device;

[0015] Fig. 9 is an enlarged structural schematic diagram of part A in another embodiment of the valve device;

[0016] Fig.10 is an enlarged structural schematic diagram of part A of the second embodiment of the valve device;

[0017] Fig.11 It is a schematic diagram of the enlarged structure of part A in the third embodiment of the valve device. DETAILED DESCRIPTION

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

[0019] Combination Figure 1-Figure 7 , illustrating a first embodiment of the valve device 100. 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 that require heat management such as battery thermal management, thermal management of electrical devices, etc.

[0020] The valve device 100 includes a valve body 1, a coil assembly 2 and a valve component 3, a part of the valve component 3 is placed in the valve body 1 cavity of the valve body 1, the valve component 3 is fixedly connected to the valve body 1, and the connection method includes threaded connection, and the coil assembly 2 is fixedly connected to the valve body 1, and the connection method includes screw connection. Of course, in other embodiments, the coil assembly 2 can be fixedly connected to the valve component 3, and the two are fixedly connected to the valve body 1 after assembly. In this embodiment, the valve body 1 is a separate valve block, and in other embodiments, the valve body 1 can also be part of a system, such as a part of a heat exchanger or a flow channel plate.

[0021] The coil assembly 2 includes a stator assembly 21 and an injection molding body 22, the injection molding body 22 covers at least part of the stator assembly 21, and the coil assembly 2 has a first accommodating cavity 23, and the first accommodating cavity 23 has an opening toward the valve body 1 in the injection molding body 22. The valve component 3 includes a valve seat component 31, a rotor component 32 and a sleeve 33, and the lower end of the sleeve 33 is connected to the valve seat component 31, and the connection method includes welding. At least part of the sleeve 33 is located in the first accommodating cavity 23, part of the sleeve 33 is located between the rotor assembly 32 and the stator assembly 21, part 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, and 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.

[0022] Combination Figure 3 and Figure 5 In this embodiment, the rotor assembly 32 includes a rotor component 321 and a valve core component 322, the rotor component 321 and the valve core component 322 are fixedly connected, the valve core component 322 includes a valve core portion 324 and a screw portion 323, and the valve core portion 324 and the screw portion 323 are connected. When a predetermined current is passed through the stator assembly 21, an excitation magnetic field can be generated, the rotor component 321 can rotate in the excitation magnetic field, and the rotor component 321 drives 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 to adjust the flow area of ​​the valve port 41. For the convenience of description, the upper and lower directions are defined as the upper and lower directions of the drawings in the specification drawings, and 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.

[0023] In this embodiment, the valve seat component 31 has an accommodating cavity 311, at least part of the valve core portion 324 is located in the accommodating cavity 311, and the valve core portion 324 moves axially 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 portion 62 and an extension portion 61, along the radial direction of the valve device 100, the elastic member 35 and the main body portion 62 are located between the valve seat component 31 and the valve core portion 324, the elastic member 35 and the main body portion 62 are in contact, the main body portion 62 and the valve core portion 324 are in contact, the extension portion 61 is located between the valve seat component 31 and the valve core portion 324, and the extension portion 61 and the valve core portion 324 are in contact. 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 be skewed, affecting the coaxiality between the valve core 324 and the valve port 41. The setting of the extension 61 increases the length of the sealing component 6. The sealing component 6 can play an axial guiding and radial limiting role on the valve core 324 to prevent the valve core 324 from being skewed relative to the valve port 41. The extension 61 can further increase the axial guiding role of the sealing component 6 on the valve core 324, which is conducive to 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 is conducive to avoiding the valve core 324 from being damaged by the valve core 324 when closing the valve port 41, which is conducive to improving the service life of the valve device 100, and at the same time, it is conducive to avoiding the situation where the valve core 324 is difficult to close the valve port 41 due to the collision between the valve core 324 and the valve port 41. Axial guidance refers to the fact 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 .

[0024] 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, 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 are in contact with each other, the main body 62 and the valve core 324 are in contact with each other, the extension 61 is located between the valve seat component 31 and the valve core 324, and the extension 61 and the valve core 324 are in contact with each other. The sealing component 6 can play the role of axial guidance and radial limitation on the valve core 324, preventing the valve core 324 from being skewed 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, which is conducive to 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 is beneficial to controlling the gap between the valve core portion 324 and the wall forming the valve port 41, 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.

[0025] 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, and the deflection of the valve core portion 324 may squeeze the nut assembly 34, so that the threaded matching of the nut assembly 34 and the screw rod portion 323 is not smooth, the rotation 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 have a working failure. The setting of the sealing component 6 in the present application scheme can prevent the valve core portion 324 from deflecting relative to the valve port 41, and avoid the deflection of the valve core portion 324 and squeezing the nut assembly 34, so as to prevent the screw rod portion 323 from jamming, and ensure 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 accommodating groove is located, and the outer peripheral wall refers to the annular wall on the surface where the outer diameter of the component is located.

[0026] Combination Figure 5-Figure 7 , the sealing component 6 is sleeved on the outer periphery of the valve core portion 324, and at least part of the inner peripheral wall of the sealing component 6 abuts 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, and the third portion 42 is located above the fourth portion 43. The connecting seat 5 includes a first portion 51 and a second portion 52, and the first portion 51 is away from the valve seat portion 4 relative to the second portion 52. The third portion 42 is located in 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 close to the valve port 41 relative to the connecting seat 5, and the first receiving groove 312 is located in the first portion 51, the second portion 52 and the third portion 42 to form the first receiving groove 312.

[0027] Combination Figure 5-Figure 7In this embodiment, the valve device 100 further includes an elastic member 35, which is made of a soft material and can be a sealing ring. The elastic member 35 is located between the sealing member 6 and the valve seat member 31. The sealing member 6 and the elastic member 35 are separate structures, and the sealing member 6 and the elastic member 35 are limitedly connected. The sealing member 6 has a fourth receiving groove 65, which is located on the outer peripheral wall of the sealing member 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. The elastic member 35 is located in the first receiving groove 312, and 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 setting of the elastic member 35 is conducive to improving the sealing between the valve seat component 31 and the valve core part 324, preventing water vapor, impurities, etc. from entering the chamber of the coil assembly 2 through the gap between the valve seat component 31 and the valve core part 324, preventing water vapor, impurities, etc. from corroding the electric control board 24 of the coil assembly 2, and 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, and the connection method includes bonding, clamping, etc. In this embodiment, the sealing component 6 is a plastic material, and the material includes a resin material. It is not excluded that the sealing component 6 contains impurities or other specific metal components. The resin material can be, for example, PTFE (Polytetrafluoroethylene), peek (polyetheretherketone), PPS (polyphenylene sulfide), etc. The elastic member 35 is a rubber material. The material of the elastic member 35 is softer than the material of the sealing component 6. It is not excluded that the elastic elastic member 35 contains impurities or other specific metal components. The rubber material can be, for example, EPDM (Ethylene Propylene Diene Monomer), hydrogenated nitrile rubber, etc.

[0028] Combination Figure 5-Figure 7The sealing component 6 includes an extension portion 61 and a main body portion 62. The sealing component 6 has an extension portion 61, which extends from the first receiving groove 312 toward the valve port 41. The extension portion 61 is located below the main body portion 62. The main body portion 62 is located in the first receiving groove 312, and 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, 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 setting of the sealing component 6 can guide the axial movement of the valve core 324 relative to the valve port 41; in addition, the setting of the sealing component 6 can also play a role in radial limiting the valve core 324, especially the setting of the main body 62, which can prevent the valve core 324 from being skewed relative to the valve port 41, which is conducive to improving the coaxiality of the valve core 324 and the valve port 41. In addition, 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 324, which can increase the guiding effect length of the sealing component 6 on the valve core 324, and further improve the coaxiality of the valve core 324 and the valve port 41.

[0029] In this embodiment, the sealing component 6 is made of plastic material, and the sealing component 6 can be deformed when squeezed. The extension part 61 of the sealing component 6 abuts against the inner peripheral wall of the third part 42, and there is a gap between the outer peripheral wall of the extension part 61 and the inner peripheral wall of the fourth part 43. When the valve core part 324 is skewed relative to the sealing component 6, the movement resistance of the valve core part 324 is large, and the valve core part 324 may be blocked; there is a gap between the outer peripheral wall of the extension part 61 and the inner peripheral wall of the fourth part 43, and the sealing component 6 can be deformed. When the valve core part 324 is skewed relative to the sealing component 6, the valve core part 324 squeezes the sealing component 6, and the valve core part 324 can still move. The application scheme is conducive to preventing the valve core part 324 from getting stuck.

[0030] The wall forming the first accommodating groove 312 includes a first upper wall 3121, which is the upper wall forming the first accommodating groove 312, and 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 are not abutted. 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 movable space.

[0031] In other embodiments, the upper end of the main body 62 may also abut against the first upper wall 3121, which can play a role in axially limiting the sealing component 6, and is conducive to preventing the sealing component 6 from moving 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 can also play a role in installing and positioning the sealing component 6 to the connecting seat 5.

[0032] 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 on the outer periphery of the screw rod portion 323, the valve core sleeve 3242 and the valve core 3241 are fixedly connected, and 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 and fixed. In other embodiments, the valve core sleeve 3242 and the valve core 3241 can also be an integrated structure, and the valve core sleeve 3242 and the valve core 3241 are integrally formed.

[0033] Reference Figure 6 In this embodiment, the sealing component 6 has a groove 64, which is arranged around the inner peripheral wall of the sealing component 6, so that there is a gap 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 and reducing the friction resistance. One or more grooves 64 can be provided. When the number of grooves 64 is multiple, each groove 64 is arranged at a certain distance, and has a certain distance 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. The sealing component 6 at this position abuts against the outer peripheral wall of the valve core 324. 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 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.

[0034] In other embodiments, the valve seat portion 4 may also be located below the connecting seat 5 , the valve seat portion 4 is close to the valve port 41 relative to the connecting seat 5 , and the first accommodating groove 312 is located between the valve seat portion 4 and the connecting seat 5 .

[0035] In other embodiments, the sealing component 6 and the elastic member 35 may also be an integral structure, the elastic member 35 is a rubber material, the sealing component 6 is a plastic material, the elastic member 35 is fixed to the sealing component 6 by a vulcanization process, and the elastic member 35 is located between the sealing component 6 and the valve seat component 31. Using the sealing component 6 as an insert to form the elastic member 35 by injection molding can further reduce parts and facilitate the assembly of the valve device 100, and in this way, the sealing between the valve seat component 31 and the valve core 3241 can also be achieved.

[0036] Reference Figure 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 rod portion 323, and 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 against the inner peripheral wall of the valve core 3241, and the inner peripheral wall of the second sealing component 7 abuts against the outer peripheral wall of the screw rod portion 323. The second sealing component 7 can also play a guiding role, which can further prevent the valve core 3241 from tilting relative to the valve port 41, and improve the coaxiality of the valve core 3241 and the valve port 41.

[0037] 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, and 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 accommodating groove 312, and the elastic member 35 is provided to improve the sealing between the valve seat portion 4 and the connecting seat 5.

[0038] Reference Fig. 9 In another embodiment, compared with 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, the extension portion 61 is located in the second receiving 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 receiving groove 44. In this way, the coaxiality between the valve core portion 324 and the valve port 41 can also be improved. 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, and the lower end of the sealing component 6 can abut against the first lower wall 3122 forming the second receiving groove 44, so that the sealing component 6 can play an axial limiting role, which is conducive to preventing the sealing component 6 from axially moving during the sliding movement of the valve core 3241 relative to the sealing component 6.

[0039] Combination Figure 5 and Fig.10In the second embodiment of the valve device 100, compared with 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, 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 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, the extension portion 61 is located in the third receiving groove 521, the outer peripheral wall of the extension portion 61 abuts against the inner peripheral wall forming the third receiving groove 521, and the inner peripheral wall of the extension portion 61 abuts against the outer peripheral wall of the valve core portion 324. In this way, the sealing component 6 can also guide the valve core 3241, improve the coaxiality of the valve core 3241 and the valve port 41, and help 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, the valve core 3241 will find it difficult to close the valve port 41, and the provision of the sealing component 6 is also conducive to ensuring the closure of the valve port 41. The sealing component 6 extends to the third receiving groove 521, which can increase the guiding length of the sealing component 6 on the valve core 3241.

[0040] In this embodiment, the connection seat 5 includes a first portion 51 and a second portion 52, and the first portion 51 is located above the second portion 52. The third receiving groove 521 is located in the second portion 52, and the extension portion 61 is located between the inner peripheral wall of the second portion 52 and the outer peripheral wall of the valve core 3241. The outer peripheral wall of the extension portion 61 abuts against the inner peripheral wall of the second portion 52. In this embodiment, the extension portion 61 is located in the third receiving groove 521, and the outer peripheral wall of the extension portion 61 abuts against the inner peripheral 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.

[0041] 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, and reduce the friction between the sealing component 6 and the valve core 3241. In other embodiments, the sealing component 6 may not be provided with a groove 64 to ensure that the sealing component 6 guides the valve core 3241. A plurality of grooves 64 may be provided.

[0042] 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.

[0043] Combination Figure 5 and Fig.11In the 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. The third embodiment is a combination of the first embodiment and the second embodiment. In this embodiment, the main body 62 is located between the two extensions 61, and the two extensions 61 are respectively located above and below the main body 62. The two extensions 61 and the main body 62 are an integral structure. The valve seat component 31 also includes a third accommodating groove 521, which is located above the first accommodating groove 312. The extension 61 arranged above the main body 62 is located in the third accommodating groove 521, and the inner peripheral wall of the extension 61 abuts against the outer peripheral wall of the valve core 324, and the outer peripheral wall of the extension 61 abuts against the inner peripheral wall forming the third accommodating groove 521. In this embodiment, the third receiving groove 521 is located in the second portion 52, and the third receiving groove 521 has an opening toward the valve core 3241. The outer peripheral wall of the extension portion 61 abuts against the inner peripheral wall forming the third receiving groove 521, and at least part of the inner peripheral wall of the extension portion 61 abuts against the outer peripheral wall of the valve core 3241. In this embodiment, the extension portion 61 arranged lower than the main body portion 62 is located between the valve seat portion 4 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. Compared with the first embodiment and the second embodiment, the length of the sealing component 6 in this embodiment is increased, and the guiding effect of the sealing component 6 on the valve core 3241 is increased, which can further ensure the coaxiality of the valve core 3241 and the valve port 41. The sealing component 6 extends upward to the third accommodating groove 521 , and extends downward between the inner circumferential wall of the valve seat portion 4 and the inner circumferential wall of the valve core 3241 , which can further increase the guiding effect length of the sealing component 6 on the valve core 3241 .

[0044] 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 and reduce the friction between the sealing component 6 and the valve core 3241. In other embodiments, the sealing component 6 may not be provided with the groove 64 to ensure the guiding effect of the sealing component 6 on the valve core 3241. A plurality of grooves 64 may be provided.

[0045] 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.

[0046] In another embodiment, the valve seat component 31 may further include a first receiving groove 312, a third receiving groove 521 and a second receiving groove 44, wherein 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 portion 61 arranged above the main body 62 is located in the third receiving groove 521, and the extension portion 61 arranged below the main body 62 is located in the second receiving groove 44, which 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 the first lower wall 3122, and the lower end of the sealing component 6 can abut against the first lower wall 3122 forming the second receiving groove 44, which can play an axial limiting role on the sealing component 6, and is conducive to preventing the sealing component 6 from axially moving during the sliding movement of the valve core 3241 relative to the sealing component 6.

[0047] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification 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), It is 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 The extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324) and the extension portion (61) is located between the valve seat component (31) and the valve core component (324).

2. The valve device (100) according to claim 1, It is 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 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 valve seat portion (4).

3. The valve device (100) according to claim 1 or 2, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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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