Fluid control device, valve module and pneumatic comfort system

Abstract

The utility model relates to fluid control technical field especially relates to a kind of fluid control device, valve module and pneumatic comfort system.Fluid control device includes valve body, valve core and first buffer pad;Valve body is equipped with lead-through chamber and with the first medium opening and second medium opening of lead-through chamber fluid communication;Valve core is located in lead-through chamber;Fluid control device has the first lead-through state of the first medium opening closed by valve core displacement, and the second lead-through state of the first medium opening opened by valve core displacement;First buffer pad is located at the first end of valve core, and first buffer pad is used to buffer the first medium opening in the first lead-through state sealing;Wherein, the periphery of first medium opening is equipped with first abutment face, and first buffer pad has the first buffer protrusion projecting towards first abutment face.The first buffer protrusion can prevent first buffer pad from vacuum bonding with first abutment face when buffering the first medium opening sealing, improve the problem that valve core is difficult to reset.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and in particular to a fluid control device, valve module and pneumatic comfort system. Background Technology

[0002] In pneumatic comfort systems, air valves, such as solenoid valves, control the inflation and deflation of air bags or regulate air pressure in the air passages. The air valve controls the opening and closing of the air inlet by switching the position of its valve core, thereby controlling the interruption or directional delivery of airflow. The valve core has a buffer pad at its end, which cushions the air inlet edge, reducing noise from the valve core impacting the edge and enhancing the sealing effect.

[0003] The periphery of the buffer pad is usually designed with an outer diameter larger than the diameter of the air port so as to completely cover and seal the air port. The end face of this periphery is usually flat. When the buffer pad seals the air port, the flat surface of the buffer pad is prone to vacuum attraction with the flat surface of the air port. This makes it difficult for the buffer pad to overcome the vacuum attraction force and move away from the air port to reset, which is not conducive to the rapid switching of the valve core position. Utility Model Content

[0004] The present invention aims to provide a fluid control device, valve module, and pneumatic comfort system, which can at least improve the problem of valve core being difficult to reset due to vacuum suction of the buffer pad.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] In a first aspect, embodiments of the present invention provide a fluid control device, the fluid control device comprising a valve body, a valve core, and a first buffer pad; the valve body is provided with a conduction chamber and a first medium opening and a second medium opening in fluid communication with the conduction chamber; the valve core is disposed in the conduction chamber; the fluid control device has a first conduction state in which the valve core is displaced to close the first medium opening, and a second conduction state in which the valve core is displaced to open the first medium opening; the first buffer pad is disposed at a first end of the valve core, the first buffer pad being used to bufferably seal the first medium opening in the first conduction state; wherein, a first abutment surface is provided around the first medium opening, and the first buffer pad has a first buffer protrusion protruding toward the first abutment surface.

[0007] In some embodiments, a raised wall protruding toward the first buffer pad is provided between the first medium opening and the first contact surface, the raised wall being used to seal against the first buffer pad in a first conductive state.

[0008] In some embodiments, the first cushioning pad extends to provide an abutment portion corresponding to the first abutment surface, and the first cushioning protrusion is provided on the abutment portion.

[0009] In some embodiments, the first buffer protrusion is located at the periphery of the abutment portion.

[0010] In some embodiments, the first end of the valve core is provided with a mounting groove, and the first buffer pad is embedded in the mounting groove; there is a buffer space between the first buffer pad and the inner wall of the mounting groove.

[0011] In some embodiments, the first conduction state further includes the valve core displacement opening the second medium opening; the second conduction state further includes the valve core displacement closing the second medium opening; the fluid control device further includes a second buffer pad, the second buffer pad being disposed at the second end of the valve core, the second buffer pad being used to bufferably seal the second medium opening in the second conduction state.

[0012] In some embodiments, the periphery of the second medium opening is provided with a second abutting surface, and the second buffer pad has a second buffer protrusion protruding toward the second abutting surface.

[0013] In some embodiments, the fluid control device further includes an actuator for actuating the valve core to close or open the first medium opening.

[0014] In some embodiments, the fluid control device further includes an elastic reset member for causing the valve core to normally open or close the first medium opening.

[0015] In some embodiments, the valve body is further provided with a third medium opening that is in fluid communication with the conduction chamber; in the first conduction state, the third medium opening is in communication with the second medium opening; in the second conduction state, the third medium opening is in communication with the first medium opening.

[0016] Secondly, this utility model provides a valve module, which includes the fluid control device as described in any of the above embodiments.

[0017] Thirdly, this utility model provides a pneumatic comfort system, which includes an air source device, a plurality of air bags, and a valve module. The air source device is in fluid communication with the plurality of air bags through the valve module.

[0018] The fluid control device of this utility model embodiment includes a buffer pad with a buffer protrusion protruding from the outer periphery of the corresponding medium opening. When the buffer pad moves closer to the closed medium opening as the valve core displaces, the buffer pad body and the protruding wall of the medium opening achieve primary buffering and sealing, ensuring a buffering and sealing effect. The buffer protrusion and the outer periphery of the medium opening provide secondary buffering, achieving better vibration reduction and noise reduction. Furthermore, the buffer protrusion prevents the peripheral abutment portion of the buffer pad from vacuum-adhering to the outer periphery of the medium opening, avoiding vacuum suction and thus reducing the vacuum suction force that the buffer pad needs to overcome during reset away from the medium opening. This improves the problem of valve core reset difficulties caused by buffer pad vacuum suction, allowing the valve core to reset quickly and increasing the flexibility of valve core position switching.

[0019] The valve module includes a fluid control device. The valves in the valve module used to control the directional delivery of fluid and regulate the fluid pressure can all adopt the above-mentioned fluid control device. The buffer pad of the fluid control device has a buffer protrusion, which improves the problem that the valve core is difficult to reset due to the vacuum suction of the buffer pad in the valve module.

[0020] The pneumatic comfort system includes an air source device, an air bag, and a valve module, enabling functions such as pneumatic support and pneumatic massage. The valve module includes valves for controlling the inflation and deflation of the air bag and valves for regulating air pressure, which can utilize the aforementioned fluid control device. The buffer pad of the fluid control device has cushioning protrusions, improving the problem of valve core difficulty in resetting due to vacuum suction of the buffer pad in the valve module. This allows the valve core to reset quickly, increasing the flexibility of valve core position switching, thereby enhancing the pneumatic control efficiency of the pneumatic comfort system, ensuring pneumatic comfort functions, and enhancing the pneumatic comfort experience.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the structure of the fluid control device according to an embodiment of the present invention;

[0024] Figure 2This is a cross-sectional view of the fluid control device according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of a portion of the structure of the fluid control device according to an embodiment of the present invention;

[0026] Figure 4 This is an exploded view of the fluid control device according to an embodiment of the present invention;

[0027] Figure 5 This is an exploded view of the fluid control device according to another embodiment of the present invention;

[0028] Figure 6 yes Figure 2 A partially enlarged cross-sectional view of the valve core;

[0029] Figure 7 This is an exploded view of a portion of the structure of the fluid control device according to an embodiment of the present invention;

[0030] Figure 8 This is a plan view of the first buffer pad according to an embodiment of the present invention.

[0031] The reference numerals in the detailed embodiments are as follows:

[0032] 100. Fluid control device;

[0033] 1. Valve body; 11. Conducting chamber; 12. First medium opening; 13. Second medium opening; 14. First valve shell; 141. First mounting port; 142. Snap hole; 15. Second valve shell; 151. Snap groove; 16. Third medium opening; 17. First abutment surface; 18. Protruding wall;

[0034] 2. Valve core; 21. Mounting groove; 211. First groove section; 212. Second groove section; 213. Limiting platform; 214. Conical groove; 22. Assembly column;

[0035] 3. First buffer pad; 31. Buckle; 32. Abutment part; 33. First buffer protrusion;

[0036] 4. Yoke; 41. Clamping post; 42. Clamping arm;

[0037] 5. Actuating element; 6. Resilient reset element;

[0038] 7. Second buffer pad; 71. Assembly slot;

[0039] a. Buffer space. Detailed Implementation

[0040] To facilitate understanding of this utility model, it will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or there may be one or more intervening elements between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this utility model, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0043] In the description of the embodiments of this utility model, the terms "first," "second," etc., are used to define components merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0044] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0045] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] Firstly, please refer to Figures 1 to 3 This utility model provides a fluid control device 100, which includes a valve body 1, a valve core 2, and a first buffer pad 3. The valve body 1 has a conduction chamber 11 and a first medium opening 12 and a second medium opening 13 in fluid communication with the conduction chamber 11. The valve core 2 is disposed in the conduction chamber 11. The fluid control device 100 has a first conduction state in which the valve core 2 is displaced to close the first medium opening 12, and a second conduction state in which the valve core 2 is displaced to open the first medium opening 12. The first buffer pad 3 is disposed at the first end of the valve core 2. The first buffer pad 3 is used to buffer contact and seal the first medium opening 12 in the first conduction state, so that when the valve core 2 is displaced close to the first medium opening 12, the first buffer pad 3 makes buffer contact with the periphery of the opening of the first medium opening 12 to avoid the valve core 2 directly impacting the periphery of the opening of the first medium opening 12 and generating noise. After the displacement is in place, the first buffer pad 3 seals the first medium opening 12.

[0047] The fluid control device 100 includes, but is not limited to, solenoid valves, electric valves, pneumatic valves, hydraulic valves, manual shut-off valves, and safety valves. Furthermore, depending on the type of fluid control device 100, the valve body 1 may have only a first medium opening 12 and a second medium opening 13, or it may have multiple medium openings, not limited to the first and second medium openings 12 and 13, such as a first medium opening 12, a second medium opening 13, and a third medium opening 16. Further, when the first medium opening 12 is open, the second medium opening 13 may be correspondingly closed or unclosed. When the second medium opening 13 is unclosed, the first medium opening 12 and the second medium opening 13 can be fluidly connected via the conduction chamber 11. When the valve body 1 has multiple medium openings, not limited to the first and second medium openings 12 and 13, when the first medium opening 12 is open and the second medium opening 13 is closed, the first medium opening 12 can be connected to other medium openings, such as the third medium opening 16.

[0048] In some embodiments, the fluid control device 100 may include, but is not limited to, a pressure regulating valve, wherein the first medium opening 12 and the second medium opening 13 may serve as an airflow inlet and a pressure discharge outlet, respectively. When the first medium opening 12 is opened, the first medium opening 12 and the second medium opening 13 are connected, and airflow flows in from the first medium opening 12 and is discharged from the second medium opening 13, or flows in from the second medium opening 13 and is discharged from the first medium opening 12.

[0049] In other embodiments, the fluid control device 100 may be a valve with fluid distribution function, such as a two-position three-way solenoid valve; see [reference needed]. Figures 2 to 4The valve body 1 also includes a third medium opening 16 that is in fluid communication with the conduction chamber 11. In the first conduction state, the third medium opening 16 is connected to the second medium opening 13; in the second conduction state, the third medium opening 16 is connected to the first medium opening 12. That is, the fluid control device 100 is used to control the third medium opening 16 to selectively connect with the first medium opening 12 or the second medium opening 13. Wherein, when the first medium opening 12 and the second medium opening 13 are respectively the vent and the inlet, and the third medium opening 16 is the inflation port, the fluid control device 100 is used to control the inflation port to selectively connect with the inlet or the vent, thereby controlling the inflation and deflation of the device to be inflated that is in fluid communication with the inflation port. Optionally, the device to be inflated is an air bag. Of course, according to the series connection of multiple fluid control devices 100, it can also be a multi-position control valve with fluid distribution function, such as a three-position three-way solenoid valve; or, according to the setting of multiple medium openings, it can also be a valve with multi-way fluid distribution function.

[0050] For valve body 1 mentioned above, please refer to Figure 4 and Figure 5 The valve body 1 includes a first valve shell 14 and a second valve shell 15. The first valve shell 14 is cavity-shaped and has a first mounting port 141 at one end that opens its inner cavity. The second valve shell 15 is disposed at the first mounting port 141 and seals the first mounting port 141, thereby enclosing and forming a conduction chamber 11, which facilitates the molding and assembly of the valve body 1. The first valve shell 14 is provided with a second medium opening 13, and the second valve shell 15 is provided with a first medium opening 12. In some embodiments, a third medium opening 16, which serves as an air inlet, may be formed in the first valve shell 14.

[0051] In some embodiments, please refer to Figure 4 and Figure 5 The fluid control device 100 is a solenoid valve, and the valve body 1 also includes a yoke 4. The yoke 4 is configured to correspond to the spool groove of the first valve housing 14, and the conduction chamber 11 is opened to correspond to the spool groove, so as to enhance the excitation effect of the electromagnetic coil wound on the spool groove on the valve core 2 in the conduction chamber 11. The yoke 4 is provided with a retaining post 41, and the first valve housing 14 is provided with a retaining hole 142. The retaining post 41 is inserted into the retaining hole 142 to snap the yoke 4 to the first valve housing 14. The yoke 4 is provided with two retaining arms 42, and the second valve housing 15 is provided with a retaining groove 151. The two retaining arms 42 clamp the second valve housing 15, and the clamping arms are at least partially located in the retaining groove 151, thereby preventing the second valve housing 15 from detaching from the first mounting port 141, so as to detachably install the second valve housing 15 to the first valve housing 14.

[0052] The valve core 2 described above is used to displace within the conduction chamber 11, thereby opening or closing the first medium opening 12. For example, please refer to... Figures 2 to 5The fluid control device 100 also includes an actuator 5, which is used to actuate the valve core 2 to open or close the first medium opening 12. In the case of a fluid control device 100 equipped with a solenoid valve, the actuator 5 can be an electromagnetic coil wound around the first valve housing 14 and corresponding to the conduction chamber 11; the valve core 2 is made of ferromagnetic material, including an iron core or a permanent magnet, so that when the electromagnetic coil is energized to generate a magnetic field, it can magnetically excite the valve core 2 to move within the conduction chamber 11.

[0053] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 5 The fluid control device 100 also includes an elastic reset member 6, which is optionally a spring. The elastic reset member 6 is used to elastically cause the valve core 2 to normally close or open the first medium opening 12.

[0054] In some embodiments, the first end of the elastic reset member 6 abuts against the second end of the valve core 2, and the second end of the elastic reset member 6 abuts against the inner wall of the valve body 1 near the second medium opening 13. The elastic reset member 6 is in a compressed state, thereby causing the valve core 2 to tend to move towards the first medium opening 12. Under the action of the elastic reset member 6, the valve core 2 normally closes the first medium opening 12. Alternatively, in other embodiments, the first end of the elastic reset member 6 abuts against the inner wall of the valve body 1 near the first medium opening 12, and the second end of the elastic reset member 6 abuts against the first end of the valve core 2. The elastic reset member 6 is in a compressed state, thereby causing the valve core 2 to tend to move away from the first medium opening 12. Under the action of the elastic reset member 6, the valve core 2 normally opens the first medium opening 12.

[0055] In some embodiments, the first medium opening 12 is configured in a "crater" structure. See also... Figure 2 and Figure 5 A raised wall 18 surrounds the first medium opening 12. The raised wall 18 is circumferentially disposed around the first medium opening 12 and protrudes towards the first buffer pad 3. The raised wall 18 is used to seal against the first buffer pad 3 in the first conductive state. Specifically, during the realization of the first conductive state, the first buffer pad 3 moves closer to the first medium opening 12 as the valve core 2 moves. The first end of the first buffer pad 3 gradually approaches the raised wall 18 and makes buffering contact with the raised wall 18 until it reaches its position and seals against the raised wall 18, thus sealing the first medium opening 12 and achieving primary buffering, vibration reduction, and noise reduction. By setting the raised wall 18, the sealing effect of the first buffer pad 3 on the first medium opening 12 and the primary buffering and noise reduction can be enhanced.

[0056] In some embodiments, please refer to Figure 2 , Figure 5 and Figure 7The first medium opening 12 has a first abutment surface 17 around its periphery. Specifically, the first abutment surface 17 is arranged around the periphery of the protruding wall 18, and the first buffer pad 3 has a first buffer protrusion 33 protruding toward the first abutment surface 17. The protruding wall 18 and the first buffer protrusion 33 are offset along the displacement axis of the valve core 2. When the first buffer pad 3 moves closer to the first medium opening 12 with the displacement of the valve core 2, the first buffer protrusion 33 and the first abutment surface 17 around the first medium opening 12 achieve buffering contact, further reducing noise and enhancing the buffering effect of the first buffer pad 3, thereby reducing the vibration and noise generated by the fluid control device 100.

[0057] It should be noted that in the existing related technologies, the periphery of the first buffer pad 3 is usually designed with an outer diameter larger than the diameter of the first medium opening 12 so as to completely cover and seal the first medium opening 12. In addition, the first contact surface 17 and the end face of the first buffer pad 3 are usually flat. When the first buffer pad 3 seals the first medium opening 12, the first buffer pad 3 is prone to vacuum attraction with the first contact surface 17, which makes it difficult for the first buffer pad 3 to overcome the vacuum attraction force and move away from the first medium opening 12 to reset. For example, under the action of the actuator 5 and / or the elastic reset member 6, the valve core 2 still cannot be reset, which is not conducive to the rapid switching of the position of the valve core 2. In this embodiment of the present invention, the first buffer protrusion 33 can prevent the first buffer pad 3 from being vacuum-fitted with the first contact surface 17. After the first medium opening 12 is closed, the large outer diameter periphery of the first buffer pad 3 and the first contact surface 17 are separated by the first buffer protrusion 33, and an air gap is formed, thus preventing vacuum adsorption. This reduces the vacuum adsorption force that the first buffer pad 3 needs to overcome during the reset process away from the first medium opening 12, improves the problem that the valve core 2 is difficult to reset due to the vacuum adsorption between the first buffer pad 3 and the first contact surface 17, and enables the valve core 2 to reset quickly, improving the flexibility of valve core 2 position switching.

[0058] Specifically, when the first buffer pad 3 moves closer to the closed first medium opening 12 as the valve core 2 moves, the first buffer pad 3 body and the raised wall 18 on the outer periphery of the first medium opening 12 achieve primary buffering, while the first buffer protrusion 33 and the first abutting surface 17 on the outer periphery of the first medium opening 12 achieve secondary buffering, ensuring buffer sealing and achieving better shock absorption and noise reduction effect.

[0059] Optionally, the height of the raised wall 18 is greater than or equal to the height of the first buffer protrusion 33, to ensure that the end of the first buffer pad 3 can first make buffering contact with the raised wall 18 and seal the first medium opening 12 when the displacement approaches, ensuring a sealing effect. The first buffer protrusion 33 then makes buffering contact with the first abutment surface 17 during the continued displacement of the first buffer pad 3, achieving further buffering and anti-vacuum suction. It is understood that along the displacement axis of the valve core 2, the first buffer protrusion 33 is offset from the raised wall 18 to avoid mutual interference, and the first buffer protrusion 33 is located on the outside of the raised wall 18 to ensure contact with the corresponding first abutment surface 17. Alternatively, the angle between the outer wall of the raised wall 18 and the first abutment surface 17 is greater than 90 degrees, i.e., the outer wall of the raised wall 18 is a slope.

[0060] In some embodiments, please refer to Figure 7 and Figure 8 The first buffer protrusions 33 are multiple and arranged circumferentially along the first medium opening 12, such as being evenly distributed along the circumference of the first medium opening 12. By setting multiple first buffer protrusions 33, the effect of preventing the first contact surface 17 from adhering to the first buffer pad 3 is enhanced. The arrangement of multiple first buffer protrusions 33 along the circumferential direction of the first medium opening 12 ensures that the resultant force between the first buffer pad 3 and the protrusion wall 18 coincides with the central axis of the first buffer pad 3, improving the problem of uneven pressure between the first buffer pad 3 and the edge of the first medium opening 12 caused by uneven force on the first buffer pad 3, and enhancing the reliability of the seal of the first buffer pad 3 on the first medium opening 12.

[0061] In some embodiments, please refer to Figure 2 and Figure 7 The first buffer protrusion 33 is hemispherical. That is, the top surface of the first buffer protrusion 33 is spherical, which reduces the contact area with the first contact surface 17, making it less likely for the first buffer protrusion 33 and the first contact surface 17 to form a vacuum.

[0062] In some embodiments, please refer to Figure 2 , Figure 6 and Figure 7 The valve core 2 has a mounting groove 21 at its first end; the first buffer pad 3 is embedded in the mounting groove 21. Optionally, the first buffer pad 3 is made of rubber, silicone, or other materials.

[0063] In some embodiments, a buffer space a is provided between the first buffer pad 3 and the inner wall of the mounting groove 21. For example, please refer to... Figure 2 and Figure 6The mounting groove 21 includes a first groove 211 and a second groove 212 that are interconnected. The first groove 211 is adjacent to the first medium opening 12, and the second groove 212 is away from the first medium opening 12. The first groove 211 is a through hole, through which the second end of the first buffer pad 3 passes and is fitted to the second groove 212. The first buffer pad 3 is interference-fitted with the first groove 211. There is a buffer space 'a' between the first buffer pad 3 and the second groove 212. Therefore, when the valve core 2 moves closer to the first medium opening 12, and the first buffer pad 3 makes buffering contact with the raised wall 18 of the first medium opening 12 for a buffered seal, the portion of the first buffer pad 3 within the second groove 212 can extend and expand along the buffer space a, allowing the first buffer pad 3 to be fully compressed in the direction intersecting the extension direction. For example, the first buffer pad 3 can be fully compressed in the depth direction of the mounting groove 21, increasing the deformation of the first buffer pad 3, enhancing its buffering effect, achieving displacement buffering of the valve core 2, reducing vibration and noise generated by the fluid control device 100, and ensuring a seal on the first medium opening 12. The first end of the first buffer pad 3 extends out of the first groove 211, or is exposed outward from the first groove 211.

[0064] Specifically, the first buffer pad 3 and the valve core 2 have the same extending direction, such as being coaxial. During a buffering impact, the force on the first buffer pad 3 is transmitted primarily axially, causing it to be compressed axially. In a preferred embodiment, the inner diameter of the first groove 211 is smaller than the inner diameter of the second groove 212; the end of the first buffer pad 3 abuts against the bottom wall of the second groove 212, and a buffer space 'a' exists radially between the first buffer pad 3 and the inner wall of the second groove 212. That is, the outer diameter of the portion of the first buffer pad 3 within the second groove 212 is smaller than the inner diameter of the second groove 212. Thus, the compression direction and the extension / expansion direction of the first buffer pad 3 intersect but do not overlap or are not parallel, such as being orthogonal, allowing the first buffer pad 3 to fully perform its buffering function.

[0065] Optionally, the first buffer pad 3 can be designed as a strip shape that is easy to form and assemble. Alternatively, the first buffer pad 3 can also be designed into a corresponding shape or a required assembly shape according to the shapes of the first groove 211 and the second groove 212. In some other embodiments, the inner diameter of the first groove 211 is greater than or equal to the inner diameter of the second groove 212, the first buffer pad 3 is in the shape of a stepped shaft, and the outer diameter of the portion of the first buffer pad 3 located in the second groove 212 is smaller than the inner diameter of the second groove 212. The portion of the first buffer pad 3 within the second groove 212 can expand radially, increasing the deformation of the first buffer pad 3 and enhancing its buffering effect.

[0066] In some other embodiments, the first buffer pad 3 and the second groove 212 may be interference-fitted; a buffer space 'a' may be provided between the first buffer pad 3 and the first groove 211. Exemplarily, the outer diameter of the portion of the first buffer pad 3 located in the first groove 211 is smaller than the inner diameter of the first groove 211. The portion of the first buffer pad 3 within the first groove 211 can expand radially, increasing the deformation of the first buffer pad 3 and enhancing its buffering effect.

[0067] In some embodiments, please refer to Figure 2 , Figure 6 and Figure 7 A limiting platform 213 is provided between the first groove 211 and the second groove 212. A buckle 31 is provided on the outer periphery of the first buffer pad 3, and the buckle 31 engages with the limiting platform 213 to prevent the first buffer pad 3 from detaching from the mounting groove 21. Exemplarily, the inner diameter of the first groove 211 is smaller than the inner diameter of the second groove 212, making the mounting groove 21 a stepped groove structure, thereby forming the limiting platform 213. This could be a stepped transition structure between the first groove 211 and the second groove 212, with the buckle 31 located within the second groove 212. When the first buffer pad 3 is pulled outwards, the buckle 31 engages with the limiting platform 213, preventing the first buffer pad 3 from detaching from the mounting groove 21. Optionally, the buckle 31 is a convex ring extending circumferentially along the first buffer pad 3; or the buckle 31 is a protrusion. In some other embodiments, the limiting platform 213 can be a protrusion projecting from the inner wall of the mounting groove 21 toward the central axis of the mounting groove 21.

[0068] When the buckle 31 is a convex ring extending circumferentially along the first buffer pad 3, the cross-section of the buckle 31 can be semi-circular, which facilitates the installation of the first buffer pad 3 into the mounting groove 21.

[0069] In some embodiments, please refer to Figure 2 There is a gap between the buckle 31 and the inner wall of the second groove 212. When the outer peripheral surface of the buckle 31 abuts against the inner wall of the second groove 212, the portion of the first buffer pad 3 corresponding to the buckle 31 cannot expand radially, reducing the deformation of the first buffer pad 3 and weakening its buffering effect. In this embodiment, while ensuring the buckle 31 engages with the limiting platform 213, a gap is maintained between the buckle 31 and the radial sidewall of the second groove 212. When the first buffer pad 3 makes buffering contact with the edge protrusion 18 of the first medium opening 12, the portion of the first buffer pad 3 corresponding to the buckle 31 can still expand radially, further improving the problem of weakened buffering effect of the first buffer pad 3.

[0070] In some embodiments, please refer to Figure 2 and Figure 7The first buffer pad 3 extends with an abutment portion 32 corresponding to the first abutment surface 17. This abutment portion 32 extends radially from the end of the first end of the first buffer pad 3, increasing the contact area between the first buffer pad 3 and the periphery of the first medium opening 12, thus enhancing the buffering effect. The abutment portion 32 has an outer diameter larger than the opening diameter of the mounting groove 21, covering the periphery of the mounting groove 21. This forms a buffer barrier between the first end face of the valve core 2 and the periphery of the first medium opening 12, preventing the valve core 2 from directly impacting the periphery of the first medium opening 12 and generating noise due to excessively fast movement. Furthermore, the abutment portion 32 prevents the first buffer pad 3 from completely sinking into the mounting groove 21, keeping the first buffer pad 3 embedded in the mounting groove 21. This facilitates the installation and removal of the first buffer pad 3 and avoids the problem of the first medium opening 12 not being sealed due to the first buffer pad 3 sinking into the mounting groove 21.

[0071] In some embodiments, please refer to Figure 2 and Figure 6 The mounting groove 21 includes a conical groove 214 communicating with the first section groove 211. The conical groove 214 is connected to the side of the first section groove 211 near the first medium opening 12. The inner diameter of the conical groove 214 gradually decreases, and the end with the smaller inner diameter is in fluid communication with the first section groove 211. An abutment portion 32 extends out of the conical groove 214 along the radial direction of the mounting groove 21. Exemplarily, the mounting groove 21 has a chamfer at the opening, thus forming the conical groove 214. When the abutment portion 32 is annular, the inner diameter of the larger end of the conical groove 214 is smaller than the outer diameter of the abutment portion 32, so that the abutment portion 32 extends out of the conical groove 214 along the radial direction of the mounting groove 21, covering the opening of the mounting groove 21. By providing the conical groove 214, the chamfered structure of the conical groove 214 facilitates the insertion of the first buffer pad 3 into the mounting groove 21. Optionally, the angle between the inner circumferential surface of the conical groove 214 and the central axis of the conical groove 214 is 45 degrees.

[0072] In some embodiments, please refer to Figure 2 and Figure 8 A first buffer protrusion 33 is provided on the abutment portion 32. Specifically, the first buffer protrusion 33 is provided on the end face of the abutment portion 32 facing the first medium opening 12 and protrudes from the end face facing the first medium opening 12. It can be understood that the distance between the first buffer protrusion 33 and the central axis of the first buffer pad 3 can be greater than the radius of the larger end of the conical groove 214, thereby improving the problem of the abutment portion 32 sinking into the conical groove 214 and ensuring the sealing effect of the first buffer pad 3 on the first medium opening 12.

[0073] In some embodiments, please refer to Figure 8The first buffer protrusion 33 is provided at the periphery of the abutment portion 32, for example, the first buffer protrusion 33 is provided at the periphery of the end face of the abutment portion 32 facing the first medium opening 12. By providing the first buffer protrusion 33 at the periphery of the abutment portion 32, vacuum suction between the periphery of the abutment portion 32 and the first abutment surface 17 is prevented, thereby improving the problem of vacuum suction caused by the first buffer pad 3 forming a sealed cavity by the periphery of the abutment portion 32 and the first abutment surface 17.

[0074] In some embodiments, particularly as a fluid control device 100 for fluid distribution, such as a two-position three-way solenoid valve, the first conducting state further includes displacement of the valve core 2 to open the second medium opening 13; the second conducting state further includes displacement of the valve core 2 to close the second medium opening 13; see also Figures 2 to 5 The fluid control device 100 also includes a second buffer pad 7, which is disposed at the second end of the valve core 2. The second buffer pad 7 is used to buffer and seal the second medium opening 13 in the second conducting state. By setting the second buffer pad 7, the sealing effect on the second medium opening 13 is enhanced, and the noise from the impact between the valve core 2 and the edge of the second medium opening 13 is reduced.

[0075] The second buffer pad 7 can have the same structure as the first buffer pad 3 and be installed on the valve core 2 in the same way. For example, the second end of the valve core 2 also has a mounting groove, through which the second buffer pad 7 is installed, and there is a buffer space between the second buffer pad 7 and the inner wall of the mounting groove at the second end of the valve core 2. Alternatively, please refer to Figure 2 and Figure 7 The valve core 2 has a mounting post 22 at its second end, with an enlarged portion at the end. The second buffer pad 7 has a mounting groove 71 that matches the mounting post 22. The mounting post 22 is located within the mounting groove 71, thereby assembling the second buffer pad 7 onto the valve core 2. It is understood that the inner diameter of the opening of the mounting groove 71 is smaller than the inner diameter of the inner portion of the mounting groove 71, to accommodate the engagement of the enlarged portion of the mounting post 22 with the mounting groove 71 of the second buffer pad 7. Furthermore, the second buffer pad 7 may also have a second buffer protrusion similar to the first buffer protrusion 33. This second buffer protrusion protrudes towards the second medium opening 13 and corresponds to the second abutment surface on the periphery of the second medium opening 13, preventing vacuum suction when the peripheral plane of the second buffer pad 7 seals the second medium opening 13, thus improving the flexibility of valve core 2 position switching. Optionally, the second buffer pad 7 is made of materials such as rubber or silicone.

[0076] Secondly, this utility model embodiment provides a valve module (not shown), which includes a fluid control device 100. The valve module is an assembly integrating multiple fluid control valves, such as two-position three-way solenoid valves, three-position three-way solenoid valves, etc. Each fluid control valve can respectively realize fluid directional delivery control, and at least one of the multiple fluid control valves uses the aforementioned fluid control device 100. Furthermore, the multiple fluid control valves of the valve module have a centralized air supply path, and the valve module may also include a pressure regulating valve located in the air supply path, and this pressure regulating valve may use the aforementioned fluid control device 100. By employing the aforementioned fluid control device 100, the valve module improves the problem of valve core 2 being difficult to reset due to vacuum suction between the first buffer pad 3 and the outer periphery of the first medium opening 12 and / or the second medium opening 13, based on the buffer protrusion of the first buffer pad 3 and / or the second medium opening 13 in the valve module; and based on the buffer space a between the first buffer pad 3 of the fluid control device 100 and the inner wall of the mounting groove 21, the vibration and noise generated by the valve module are reduced.

[0077] Thirdly, this utility model embodiment provides a pneumatic comfort system (not shown). The pneumatic comfort system includes an air source device (not shown), several air bags (not shown), and a valve module. The air source device is fluidly connected to the several air bags through the valve module. Specifically, multiple fluid control valves of the valve module are fluidly connected to one air bag respectively, controlling the inflation and deflation of the corresponding air bag. The valve module is used to control the opening and closing of the air path between the air source device and the several air bags, thereby controllably supplying air to the air bags, causing the air bags to inflate. The valve module is also used to fluidly connect the air bags to the external environment or a negative pressure device, causing the air bags to deflate and contract. Furthermore, the fluid control valves of the valve module can also control the pressure of the gas filled into the air bags. Through the expansion, contraction, and pressure maintenance of the air bags, pneumatic massage and pneumatic support can be achieved. The pressure regulating valve set in the valve module can regulate the gas pressure in the air supply path.

[0078] The valve module includes valves for controlling the inflation and deflation of air bags and valves for regulating air pressure, which can utilize the aforementioned fluid control device 100. Based on the buffer protrusions of the first buffer pad 3 and / or the second buffer pad 7 of the fluid control device 100, the problem of valve core 2 being difficult to reset due to vacuum suction between the first buffer pad 3 and the outer periphery of the first medium opening 12 and / or the second medium opening 13 is improved. This allows valve core 2 to reset quickly, increasing the flexibility of valve core 2 position switching and enhancing the comfort of pneumatic control. Furthermore, the buffer space 'a' between the first buffer pad 3 of the fluid control device 100 and the inner wall of the mounting groove 21 reduces valve noise, thereby reducing vibration and noise generated by the pneumatic comfort system and improving the user experience. Several air bags can be independently fluidly connected to each fluid control valve in the valve module, allowing multiple air bags to be independently inflated and deflated.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fluid control device, characterized by, include: The valve body is provided with a conduction chamber and a first medium opening and a second medium opening that are in fluid communication with the conduction chamber; The valve core is located in the conduction chamber; The fluid control device has a first conducting state that causes the valve core to displace and close the first medium opening, and a second conducting state that causes the valve core to displace and open the first medium opening. A first buffer pad is disposed at the first end of the valve core. The first buffer pad is used to buffer and seal the first medium opening in the first conducting state. The first medium opening has a first contact surface around its periphery, and the first buffer pad has a first buffer protrusion protruding toward the first contact surface.

2. The fluid control device according to claim 1, characterized in that, A raised wall protruding toward the first buffer pad is provided between the first medium opening and the first contact surface. The raised wall is used to seal against the first buffer pad in the first conductive state.

3. The fluid control device according to claim 1, characterized in that, The first buffer pad extends to have an abutment portion corresponding to the first abutment surface, and the first buffer protrusion is provided on the abutment portion.

4. The fluid control device according to claim 3, characterized in that, The first buffer protrusion is located at the periphery of the abutment portion.

5. The fluid control device according to claim 1, characterized in that, The valve core has a mounting groove at its first end, and the first buffer pad is embedded in the mounting groove; there is a buffer space between the first buffer pad and the inner wall of the mounting groove.

6. The fluid control device according to claim 1, characterized in that, The first conduction state also includes the valve core displacement opening the second medium opening; The second conduction state also includes the valve core displacement closing the second medium opening; The fluid control device further includes a second buffer pad, which is disposed at the second end of the valve core. The second buffer pad is used to buffer and seal the second medium opening in the second conducting state.

7. The fluid control device according to claim 6, characterized in that, The second medium opening has a second contact surface around its periphery, and the second buffer pad has a second buffer protrusion protruding toward the second contact surface.

8. The fluid control device according to claim 1, characterized in that, It also includes an actuator for actuating the valve core to close or open the first medium opening.

9. The fluid control device according to claim 1, characterized in that, It also includes an elastic reset element, which is used to cause the valve core to normally open or close the first medium opening.

10. The fluid control device according to any one of claims 1 to 9, characterized in that, The valve body is further provided with a third medium opening that is in fluid communication with the conduction chamber; in the first conduction state, the third medium opening is in communication with the second medium opening; in the second conduction state, the third medium opening is in communication with the first medium opening.

11. A valve module characterized by Includes the fluid control device as described in any one of claims 1 to 10.

12. A pneumatic comfort system characterized in that, include: Gas source device; Several air bags; The valve module of claim 11, said gas source means being in fluid communication with a number of said gas bags through said valve module.

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