Double-moving spool solenoid valve for automotive seat pneumatic system

Abstract

The application discloses a double-moving valve core electromagnetic valve for an automobile seat pneumatic system, which comprises a valve seat, a first valve core and a second valve core, and an elastic member, wherein the valve seat is provided with a valve cavity, an air inlet channel, a communication channel and an air outlet channel; the first valve core and the second valve core are arranged in the valve cavity, the first valve core is movable in a set direction to block or open the air outlet channel, and the second valve core is movable in a set direction to block or open the air inlet channel; the elastic member is located between the first valve core and the second valve core and used for applying a driving force for blocking the air outlet channel to the first valve core and a driving force for blocking the air inlet channel to the second valve core; and an electromagnetic coil is arranged outside the valve seat and at least partially surrounds the first valve core. The double-moving valve core electromagnetic valve for the automobile seat pneumatic system provided by the embodiment of the application reduces the overall occupied space, prevents the elastic member from greatly vibrating and reduces the generation of noise.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and more specifically, to a double-acting solenoid valve for a pneumatic system of an automotive seat. Background Technology

[0002] Solenoid valves are widely used in automotive seat pneumatic systems and are of great significance for improving the driving and riding experience. In related technologies, solenoid valves are used in conjunction with externally mounted check valves to control the airflow direction, which increases the overall size of the valve structure, occupies most of the space, greatly reduces space utilization, and does not meet the current requirements for valve miniaturization. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a double-acting valve core solenoid valve for automotive seat pneumatic systems. The double-acting valve core solenoid valve for automotive seat pneumatic systems reduces the overall space occupied, while preventing large-amplitude vibration of elastic elements and reducing noise generation.

[0004] A dual-acting valve core solenoid valve for an automotive seat pneumatic system according to an embodiment of the present invention includes: a valve seat having a valve cavity and an intake passage, a connecting passage, and an exhaust passage communicating with the valve cavity; a first valve core and a second valve core arranged within the valve cavity, the first valve core being movable along a predetermined direction to block or open the exhaust passage, and the second valve core being movable along the predetermined direction to block or open the intake passage; an elastic element located between the first valve core and the second valve core, the elastic element being used to apply a driving force to the first valve core to block the exhaust passage and to apply a driving force to the second valve core to block the intake passage; and an electromagnetic coil disposed outside the valve seat and at least partially surrounding the first valve core.

[0005] According to an embodiment of the present invention, the double-acting valve core solenoid valve for the pneumatic system of an automobile seat achieves air pressure control of the air-using device through the cooperation of the first valve core, the second valve core, and the elastic element in the valve cavity. The overall space occupied by the solenoid valve is reduced, which meets the application requirements of the small installation space on the automobile seat. Furthermore, the elastic element is located between the first valve core and the second valve core, which can reduce the direct impact of airflow on the elastic element, prevent the elastic element from vibrating significantly, and thus reduce the generation of noise.

[0006] In addition, the dual-acting valve core solenoid valve for the automotive seat pneumatic system according to the above embodiments of the present invention may also have the following additional technical features: According to some embodiments of the present invention, the first valve core and / or the second valve core are provided with a receiving groove recessed along the set direction, and the elastic element portion is located within the receiving groove.

[0007] According to some embodiments of the present invention, the first valve core and / or the second valve core include a small-diameter section and a large-diameter section arranged and connected along a set direction, wherein the outer diameter of the small-diameter section is smaller than the outer diameter of the large-diameter section, and the elastic element is sleeved on the small-diameter section.

[0008] According to some embodiments of the present invention, one of the first valve core and the second valve core is connected to one end of the elastic member, and the other is provided with a flexible member, the other end of the elastic member being connected to the flexible member.

[0009] According to some embodiments of the present invention, a gas flow channel is formed between the first valve core and the cavity wall of the valve chamber, and between the second valve core and the cavity wall of the valve chamber, the gas flow channel connecting the space of the first valve core facing the connecting channel side and the space of the second valve core facing the air intake channel side.

[0010] According to some embodiments of the present invention, the outer peripheral surface of the first valve core is provided with a plurality of first grooves arranged at intervals along the circumferential direction, the first grooves extending along the predetermined direction, and the outer peripheral surface of the second valve core is provided with a plurality of second grooves arranged at intervals along the circumferential direction, the second grooves extending along the predetermined direction, and the gas flow channel is formed at the first grooves and the second grooves.

[0011] According to some embodiments of the present invention, in the set direction, the length of the electromagnetic coil is greater than the length of the first valve core, and the second valve core is at least partially located within the area enclosed by the electromagnetic coil; and / or, the first valve core is provided with a first sealing element at one end facing the exhaust passage, the first sealing element being used to seal against the opening of the exhaust passage; and / or, the second valve core is provided with a second sealing element at one end facing the intake passage, the second sealing element being used to seal against the opening of the intake passage.

[0012] According to some embodiments of the present invention, the valve seat includes a seat body and an air inlet portion. The seat body defines the valve cavity, the communication channel, and the exhaust channel. One end of the seat body has a valve mounting port communicating with the valve cavity. The air inlet portion defines the air inlet channel and is inserted into the valve mounting port and sealed to the seat body.

[0013] According to some embodiments of the present invention, the solenoid valve has an intake state, a pressure holding state, and an exhaust state. In the intake state, the second valve core opens the intake passage under the intake pressure of the intake passage, and the first valve core blocks the exhaust passage, so that the intake passage communicates with the connecting passage through the valve cavity. In the pressure holding state, under the action of the elastic element, the second valve core blocks the intake passage, and the first valve core blocks the exhaust passage. In the exhaust state, the first valve core opens the exhaust passage under the action of the electromagnetic coil, and the second valve core blocks the intake passage under the action of the elastic element and the electromagnetic coil, so that the connecting passage communicates with the exhaust passage through the valve cavity.

[0014] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of the solenoid valve according to the first embodiment of the present invention; Figure 2 This is a schematic diagram of the first valve core and the second valve core according to the first embodiment of the present invention; Figure 3 This is a schematic diagram of the solenoid valve in the intake state according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of the solenoid valve in the exhaust state according to the first embodiment of the present invention; Figure 5 This is a schematic diagram of the solenoid valve in the pressure-holding state according to the first embodiment of the present invention; Figure 6 This is a schematic diagram of the solenoid valve in the intake state according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the solenoid valve in the exhaust state according to the second embodiment of the present invention; Figure 8 This is a schematic diagram of the solenoid valve in the pressure-holding state according to the second embodiment of the present invention; Figure 9 This is a schematic diagram of the solenoid valve in the pressure-holding state according to the third embodiment of the present invention; Figure 10 This is an exploded view of a solenoid valve according to a third embodiment of the present invention; Figure 11 This is a cross-sectional view of the solenoid valve in its exploded state according to a third embodiment of the present invention; Figure 12This is a schematic diagram of the solenoid valve in the pressure-holding state according to the fourth embodiment of the present invention; Figure 13 This is an exploded view of a solenoid valve according to a fourth embodiment of the present invention.

[0016] Figure label: Solenoid valve 100; Valve seat 10; valve chamber 11; air inlet passage 12; connecting passage 13; exhaust passage 14; seat body 15; valve mounting port 51; air inlet section 16; locking protrusion 161; First valve core 20; First groove 21; Second valve core 30; second groove 31; small diameter section 32; large diameter section 33; receiving groove 34; Elastic element 40; Electromagnetic coil 50; Flexible component 60; First seal 71; Second seal 72; Third seal 73; Fourth seal 74; Connector 80; Gas-using device 300. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The following is for reference. Figures 1-13 A double-acting valve core solenoid valve 100 for an automotive seat pneumatic system is described according to an embodiment of the present invention.

[0020] like Figures 1-13 As shown, a double-acting valve core solenoid valve 100 for an automotive seat pneumatic system according to some embodiments of the present invention includes: a valve seat 10, a first valve core 20, a second valve core 30, an elastic element 40, and an electromagnetic coil 50.

[0021] Specifically, the valve seat 10 has a valve cavity 11, an intake passage 12, a connecting passage 13, and an exhaust passage 14, all of which are connected to the valve cavity 11. A first valve core 20 and a second valve core 30 are arranged within the valve cavity 11. The first valve core 20 is movable in a predetermined direction to block or open the exhaust passage 14, and the second valve core 30 is movable in a predetermined direction to block or open the intake passage 12. An elastic member 40 is located between the first valve core 20 and the second valve core 30. The elastic member 40 is used to apply a driving force to the first valve core 20 to block the exhaust passage 14 and to apply a driving force to the second valve core 30 to block the intake passage 12. An electromagnetic coil 50 is disposed outside the valve seat 10 and at least partially surrounds the first valve core 20.

[0022] The air intake passage 12, the connecting passage 13, and the exhaust passage 14 are all connected to the valve chamber 11. The air intake passage 12 can be used to connect to an air source, and the connecting passage 13 can be used to connect to the air-using device 300. The air-using device 300 can be, but is not limited to, a seat massage device, a lumbar support, a leg support, etc. The exhaust passage 14 can be used for gas discharge. The air source gas can enter the air-using device 300 through the air intake passage 12, the valve chamber 11, and the connecting passage 13 to inflate the air-using device 300. The gas inside the air-using device 300 can be discharged through the connecting passage 13, the valve chamber 11, and the exhaust passage 14 to vent the air-using device 300. When both the air intake passage 12 and the exhaust passage 14 are blocked, the air-using device 300 can maintain pressure.

[0023] Furthermore, the first valve core 20 and the second valve core 30 are arranged in the valve cavity 11, with the first valve core 20 close to the exhaust channel 14 and the second valve core 30 close to the intake channel 12. The first valve core 20 can move in a set direction to block or open the exhaust channel 14, and the second valve core 30 can move in a set direction to block or open the intake channel 12, so that the first valve core 20 and the second valve core 30 can independently control the on / off state of the intake channel 12 and the exhaust channel 14, so that the gas flowing into the valve cavity 11 from the intake channel 12 will not be directly discharged through the exhaust channel 14 but can flow smoothly into the connecting channel 13, and the gas discharged by the gas-using device 300 will not flow back through the intake channel 12 but can be smoothly discharged through the exhaust channel 14, thereby realizing the unidirectional flow of gas in the intake channel 12 and the exhaust channel 14 of the solenoid valve 100.

[0024] In addition, such as Figure 3 As shown, the elastic element 40 applies a driving force to the first valve core 20 and the second valve core 30, meaning the forces acting on the first valve core 20 and the second valve core 30 from the elastic element 40 are in opposite directions, so that the first valve core 20 can reliably block the exhaust passage 14 and the second valve core 30 can reliably block the intake passage 12. An electromagnetic coil 50 is disposed outside the valve seat 10 and at least partially surrounds the first valve core 20. When the electromagnetic coil 50 is energized, it generates a magnetic field, which can at least cause the first valve core 20 to move under the action of the magnetic force, providing a driving force to open the exhaust passage 14. The first valve core 20 moves away from the exhaust passage 14, allowing gas to be discharged smoothly.

[0025] For example, in some specific embodiments, the solenoid valve 100 has an intake state, a pressure holding state, and an exhaust state.

[0026] Among them, such as Figure 3 and Figure 6 As shown, in the intake state, under the action of the intake pressure of the intake passage 12 (for example, the intake pressure of the intake passage 12 is increased compared with the pressure holding state and the exhaust state), the second valve core 30 can compress the elastic member 40 to move away from the intake passage 12 to open the intake passage 12. The first valve core 20 can block the exhaust passage 14 under the elastic force of the elastic member 40, so that the intake passage 12 is connected to the connecting passage 13 through the valve cavity 11.

[0027] like Figure 5 , Figure 8 , Figure 9 and Figure 12 As shown, in the pressure-holding state, under the action of the elastic element 40, the second valve core 30 can block the air intake passage 12, and the first valve core 20 can block the exhaust passage 14. The gas in the gas-using device 300 cannot flow out through the air intake passage 12 and the exhaust passage 14, and the gas pressure in the gas-using device 300 remains stable.

[0028] like Figure 4 and Figure 7 As shown, in the exhaust state, the first valve core 20 can compress the elastic element 40 and move it away from the exhaust passage 14 under the action of the electromagnetic coil 50 to open the exhaust passage 14. The second valve core 30 can block the intake passage 12 under the action of the elastic element 40, so that the connecting passage 13 is connected to the exhaust passage 14 through the valve cavity 11. Optionally, the second valve core 30 can also be located at least partially within the area enclosed by the electromagnetic coil 50, so that the second valve core 30 can block the intake passage 12 under the combined action of the elastic element 40 and the electromagnetic coil 50, thereby improving the sealing effect of the intake passage 12.

[0029] In the embodiments of this application, the first valve core 20, the second valve core 30, and the elastic element 40 are all arranged inside the valve cavity 11, without occupying the space outside the valve seat 10. This is beneficial to improving the space utilization rate inside the valve seat 10 and reducing the overall space occupied by the solenoid valve 100, thus meeting the application requirements of smaller installation space on car seats.

[0030] Furthermore, when the gas flows through the valve chamber 11 within the solenoid valve 100, the main flow path is the outer periphery of the first valve core 20 and the outer periphery of the second valve core 30. The gas flow between the first valve core 20 and the second valve core 30 is slow or almost nonexistent. By placing the elastic element 40 between the first valve core 20 and the second valve core 30, the airflow is prevented from directly impacting the elastic element 40. For example, the airflow entering through the intake channel 12 directly impacts the second valve core 30, while the airflow exiting through the connecting channel 13 directly impacts the first valve core 20. The impact force on the elastic element 40 is relatively small, thus the elastic element 40 is less prone to vibration and abnormal noise due to impact, effectively improving the noise problem of the solenoid valve 100.

[0031] According to an embodiment of the present invention, the dual-acting valve core solenoid valve 100 for a pneumatic system of an automobile seat achieves air pressure control of the air-using device 300 through the cooperation of the first valve core 20, the second valve core 30, and the elastic element 40 in the valve chamber 11. The overall space occupied by the solenoid valve 100 is reduced, which meets the application requirements of the small installation space on the automobile seat. Furthermore, the elastic element is located between the first valve core 20 and the second valve core 30, which can reduce the direct impact of airflow on the elastic element 40, prevent the elastic element 40 from vibrating significantly, and thus reduce the generation of noise.

[0032] According to some embodiments of the present invention, such as Figures 6-9 and Figure 12 As shown, at least one of the first valve core 20 and the second valve core 30 is provided with a receiving groove 34 recessed along a set direction, and the elastic member 40 is partially located in the receiving groove 34.

[0033] For example, only the first valve core 20 may have a receiving groove 34, with one end of the elastic member 40 located in the receiving groove 34 and the other end abutting against the end face of the second valve core 30; or only the second valve core 30 may have a receiving groove 34, with one end of the elastic member 40 located in the receiving groove 34 and the other end abutting against the end face of the first valve core 20; or both the first valve core 20 and the second valve core 30 may have a receiving groove 34, with both ends of the elastic member 40 located in the receiving grooves 34 of the first valve core 20 and the second valve core 30, respectively.

[0034] By providing the receiving groove 34, at least a portion of the elastic element 40 can be hidden inside the first valve core 20 or the second valve core 30. The main flow path of the airflow is outside the first valve core 20 and the second valve core 30, such as the outer side of the outer peripheral surface of the first valve core 20 and the outer side of the outer peripheral surface of the second valve core 30. Thus, the elastic element 40 can be better hidden outside the main flow path of the airflow, which is more conducive to reducing the risk of vibration and noise caused by the airflow impact of the elastic element 40.

[0035] According to some embodiments of the present invention, such as Figures 3-5 As shown, at least one of the first valve core 20 and the second valve core 30 includes a small-diameter section 32 and a large-diameter section 33 arranged and connected along a set direction. The outer diameter of the small-diameter section 32 is smaller than the outer diameter of the large-diameter section 33. The elastic element 40 is sleeved on the small-diameter section 32.

[0036] For example, the first valve core 20 includes a small diameter section 32 and a large diameter section 33, and the elastic element 40 can abut between the large diameter section 33 and the second valve core 30; or, the second valve core 30 includes a small diameter section 32 and a large diameter section 33, and the elastic element 40 can abut between the large diameter section 33 and the first valve core 20; or, both the first valve core 20 and the second valve core 20 include a small diameter section 32 and a large diameter section 33, and the elastic element 40 can be sleeved on the two small diameter sections 32 and abut between the two large diameter sections 33.

[0037] Therefore, the cooperation between the small-diameter section 32 and the large-diameter section 33 enables reliable fixing and limiting of the elastic element 40, preventing significant shaking during deformation. Simultaneously, compared to the large-diameter section 33, the small-diameter section 32 has a larger distance from the inner circumference of the valve cavity 11, resulting in a slower airflow velocity. Positioning the elastic element 40 here not only reduces the impact of airflow on it, but the large-diameter section 33 also provides some shielding against airflow, making it less likely for airflow to flow towards the elastic element 40. This further reduces the risk of vibration and noise caused by airflow impact on the elastic element 40.

[0038] In some embodiments, such as Figures 1-13 As shown, one of the first valve core 20 and the second valve core 30 is connected to one end of the elastic member 40, and the other of the first valve core 20 and the second valve core 30 is provided with a flexible member 60, and the other end of the elastic member 40 is connected to the flexible member 60.

[0039] Flexible component 60 refers to a component that can undergo a certain elastic deformation under the action of external force, and its material can be, but is not limited to, rubber, silicone, etc.

[0040] The other end of the elastic element 40 is connected to the flexible element 60. The connection method can be, but is not limited to, abutment, snap-fit, etc. By connecting with the flexible element 60, the other end of the elastic element 40 does not need to be directly connected to the rigid component (i.e., the other one of the first valve core 20 and the second valve core 30), which helps to reduce abnormal noise during the elastic deformation process of the elastic element 40.

[0041] Taking the first valve core 20 with a flexible component 60 as an example, such as Figures 3-9 and Figure 12 As shown, the flexible member 60 and the first valve core 20 can be connected by means of sleeve, embedding, etc. For example, the first valve core 20 can be provided with a groove, and at least a portion of the flexible member 60 is embedded in the groove. In the intake state or the pressure holding state, the elastic member 40 applies a driving force to the flexible member 60 toward the exhaust passage 14, thereby driving the first valve core 20 to block the exhaust passage 14. The elastic member 40 and the first valve core 20 cooperate indirectly to prevent frictional noise between the elastic member 40 and the first valve core 20.

[0042] In some embodiments, such as Figures 3-9 and Figure 12 As shown, a gas flow channel is formed between the first valve core 20 and the cavity wall of the valve chamber 11, and between the second valve core 30 and the cavity wall of the valve chamber 11. The gas flow channel connects the space of the first valve core 20 facing the connecting channel 13 and the space of the second valve core 30 facing the air intake channel 12.

[0043] Here, the cavity wall of the valve cavity 11 may include, but is not limited to, the inner peripheral wall of the valve cavity 11 and the end walls of the valve cavity 11 at both ends in the set direction. Furthermore, the structure of the gas flow channel is flexibly configured according to the positions of the connecting channel 13 and the inlet channel 12. For example, the connecting channel 13 and the inlet channel 12 may be located at both ends of the valve seat 10 in the set direction, and the gas flow channel may extend along the set direction; or, for another example, the inlet channel 12 may be located at one end of the valve seat 10 in the set direction, the connecting channel 13 may be located on one side of the valve seat 10 perpendicular to the set direction, and the gas flow channel may extend along the set direction or bend and extend, etc.

[0044] By forming a gas flow channel, the airflow entering through the intake channel 12 can flow smoothly to the connecting channel 13 under the intake state, increasing the flow area and reducing the gas flow resistance to ensure inflation efficiency.

[0045] In some embodiments, such as Figures 2-8As shown, the outer peripheral surface of the first valve core 20 is provided with a plurality of first grooves 21 arranged at intervals along the circumference. The first grooves 21 extend along a set direction. The outer peripheral surface of the second valve core 30 is provided with a plurality of second grooves 31 arranged at intervals along the circumference. The second grooves 31 extend along a set direction. Gas flow channels are formed at the first grooves 21 and the second grooves 31.

[0046] Here, the extension of the first groove 21 along the set direction should be interpreted broadly. For example, the first groove 21 can extend linearly along the set direction, extend at a certain angle to the set direction, or extend spirally along the outer circumference of the first valve core 20, as long as it can penetrate to both ends of the first valve core 20 in the set direction. Similarly, the extension of the second groove 31 along the set direction should be interpreted broadly, and will not be elaborated here. In addition, the shape and number of grooves (first groove 21 and second groove 31) can be designed according to the required air intake rate, improving the flexibility of the product.

[0047] By machining multiple grooves on the outer peripheral surfaces of the first valve core 20 and the second valve core 30 to form gas flow channels, the flow area of ​​the gas flow channels can be increased, and the airflow distribution in the circumferential direction of the first valve core 20 and the second valve core 30 is more uniform. Furthermore, while ensuring the flow area, the distance between the ungrooved portions of the outer peripheral surfaces of the first valve core 20 and the second valve core 30 and the inner peripheral surface of the valve cavity 11 can be smaller, thereby improving the guiding effect of the first valve core 20 and the second valve core 30 during their movement in the set direction. This reduces the likelihood of the first valve core 20 and the second valve core 30 shifting, thus improving the opening and closing effect on the intake channel 12 and the exhaust channel 14.

[0048] In addition, the airflow flows along the first groove 21 and the second groove 31, which helps to reduce the flow of airflow between the first valve core 20 and the second valve core 30, thereby reducing the impact force of the airflow on the elastic element 40 and improving the effect of reducing abnormal noise.

[0049] In some embodiments, such as Figures 3-9 and Figure 12 As shown, in the set direction, the length of the electromagnetic coil 50 is greater than the length of the first valve core 20, and the second valve core 30 is at least partially located within the area enclosed by the electromagnetic coil 50.

[0050] On the one hand, the magnetic field generated by the electromagnetic coil 50 is stronger, which in turn makes the magnetic force on the first valve core 20 greater, and can better block and open the exhaust passage 14; on the other hand, the second valve core 30 can make full use of the space inside the electromagnetic coil 50, so that the overall size of the electromagnetic valve 100 can be further reduced.

[0051] In some specific embodiments, the second valve core 30 can also cooperate with the electromagnetic coil 50 and be subjected to magnetic force when the electromagnetic coil 50 is energized, so as to improve the sealing effect of the second valve core 30 in blocking the intake passage 12 under exhaust conditions.

[0052] In some embodiments, such as Figures 1-13 As shown, the first valve core 20 is provided with a first sealing element 71 at one end facing the exhaust channel 14. The first sealing element 71 is used to seal and cooperate with the channel opening of the exhaust channel 14.

[0053] In some embodiments, such as Figures 1-13 As shown, the second valve core 30 is provided with a second sealing element 72 at one end facing the air intake channel 12. The second sealing element 72 is used to seal and cooperate with the channel opening of the air intake channel 12.

[0054] The materials of the first seal 71 and the second seal 72 can be, but are not limited to, soft and resilient materials such as rubber and resin. Compared to the first valve core 20 and the second valve core 30 directly blocking the air intake passage 12 and the exhaust passage 14, the sealing effect is better improved by using the first seal 71 and the second seal 72. This prevents gas leakage from the gas-using device 300 due to poor sealing during the pressure holding state, thus improving the user experience.

[0055] In some embodiments, such as Figures 1-13 As shown, the valve seat 10 includes a seat body 15 and an air inlet 16. The seat body 15 defines a valve cavity 11, a communication channel 13 and an exhaust channel 14. One end of the seat body 15 has a valve mounting port 151 that communicates with the valve cavity 11. The air inlet 16 defines an air inlet channel 12. The air inlet 16 is inserted into the valve mounting port 151 and is sealed to the seat body 15.

[0056] The cooperation between the seat body 15 and the air intake 16 facilitates the installation of components such as the first valve core 20, the second valve core 30, and the elastic element 40 within the valve chamber 11. Furthermore, the structure of the valve chamber 11, the connecting channel 13, the air intake channel 12, and the exhaust channel 14 is easy to machine, reducing processing difficulty. Optionally, the seat body 15 and the air intake 16 can be detachably connected, facilitating replacement of damaged components and improving product reusability.

[0057] The specific structure of the air intake 16 can be flexibly configured according to actual conditions, for example, in some embodiments such as Figures 3-9 As shown, the air intake passage 12 inside the air intake section 16 can extend in a straight line, or as... Figure 12 The air intake channel 12 shown can be bent and extended, with a bending angle that can be, but is not limited to, 90°. This allows the orientation of the air intake channel 12 to be flexibly adjusted to meet the different spatial requirements of its mating components.

[0058] For example, in some embodiments, the inlet end of the air intake 16 can be connected to an air pipe, such as... Figures 9-13 As shown, the outer peripheral surface of the inlet end of the air intake 16 may be provided with structures such as a locking protrusion 161 and a fourth sealing element 74 to improve the sealing performance of the connection between the inlet end of the air intake 16 and the air pipe and reduce the risk of gas leakage.

[0059] like Figures 1-13 As shown, in some specific embodiments, the valve seat 10 may include a connector 80, which connects the seat body 15 and the air inlet 16 to maintain a stable plug-in state, ensuring a reliable seal at the valve mounting port 151. Furthermore, the connector 80 is detachable, allowing for the disassembly and assembly of the seat body 15 and the air inlet 16, facilitating later maintenance and replacement of individual components.

[0060] like Figures 1-5 As shown, the double-acting valve core solenoid valve 100 for an automotive seat pneumatic system according to the first embodiment of the present invention includes a valve seat 10, a first valve core 20, a second valve core 30, an elastic element 40, and an electromagnetic coil 50.

[0061] The valve seat 10 has a valve cavity 11 and an air intake passage 12, a connecting passage 13, and an exhaust passage 14 communicating with the valve cavity 11. In a set direction, the air intake passage 12 is located at one end of the valve cavity 11, and the connecting passage 13 and the exhaust passage 14 are located at the other end of the valve cavity 11. The connecting passage 13 is connected to an air-using device 300, which is a massage device for a car seat; the air intake passage 12 is connected to an air source, and the exhaust passage 14 is connected to the outside.

[0062] A first valve core 20 and a second valve core 30 are arranged in a predetermined direction within the valve cavity 11. The first valve core 20 is movable in the predetermined direction to block or open the exhaust passage 14 through a first seal 71 on the first valve core 20. The second valve core 30 is movable in the predetermined direction to block or open the intake passage 12 through a second seal 72 on the second valve core 30. The outer peripheral surface of the first valve core 20 is provided with a plurality of first grooves 21 extending in the predetermined direction, and the outer peripheral surface of the second valve core 30 is provided with a plurality of second grooves 31 extending in the predetermined direction, so as to increase the flow area of ​​the first valve core 20 and the second valve core 30 for the intake airflow.

[0063] The elastic element 40 is located between the first valve core 20 and the second valve core 30. The elastic element 40 is sleeved on the small-diameter section 32 of the second valve core 30 and abuts against the large-diameter section 33 of the second valve core 30 and the flexible element 60 on the first valve core 20. The elastic element 40 is used to apply a driving force to the first valve core 20 to block the exhaust passage 14, and to apply a driving force to the second valve core 30 to block the intake passage 12. The electromagnetic coil 50 is disposed outside the valve seat 10 and at least partially surrounds the first valve core 20 and the second valve core 30. The dual-acting valve core solenoid valve 100 for automotive seat pneumatic systems has an intake state, a pressure holding state, and an exhaust state.

[0064] In the intake state, the intake pressure of the intake passage 12 increases, causing the second valve core 30 to compress the elastic element 40 under the intake pressure of the intake passage 12 to open the intake passage 12. At the same time, the compressed elastic element 40 can apply a greater driving force to the first valve core 20 to block the exhaust passage 14, thereby ensuring that the first seal 71 on the first valve core 20 is held in a position that reliably blocks the exhaust passage 14. The intake gas flowing into the valve chamber 11 through the intake passage 12 can flow smoothly through the first groove 21 and the second groove 31 on the first valve core 20 and the second valve core 30 to the connecting passage 13, and then flow into the gas-using device 300 to charge the gas-using device 300.

[0065] In the pressure-holding state, the intake pressure of the intake passage 12 is relatively small, less than the elastic force of the elastic element 40. Under the action of the elastic element 40, the second sealing element 72 on the second valve core 30 can reliably block the intake passage 12, and the first sealing element 71 on the first valve core 20 can reliably block the exhaust passage 14, thereby ensuring the stability of the air pressure in the air-using device 300.

[0066] In the exhaust state, the electromagnetic coil 50 is energized, and the first valve core 20 compresses the elastic element 40 under the action of the electromagnetic coil 50 to open the exhaust passage 14. The compressed elastic element 40 can apply a greater driving force to the second valve core 30 to block the intake passage 12. At the same time, the electromagnetic coil 50 can apply a magnetic force to the second valve core 30 to block the intake passage 12. Under the combined action of the elastic element 40 and the electromagnetic coil 50, the second valve core 30 can achieve a more reliable blockage of the intake passage 12, so that the connecting passage 13 can be connected to the exhaust passage 14 through the valve cavity 11.

[0067] In the above embodiments, the dual-acting valve core solenoid valve 100 for automotive seat pneumatic systems has a compact and reasonable structure with a clear component layout, enabling the integration of a first valve core 20, a second valve core 30, an elastic element 40, an electromagnetic coil 50, a flexible element 60, a first sealing element 71, a second sealing element 72, a third sealing element 73, a connecting element 80, and an air-using device 300. Compared with external one-way valves in related technologies, the dual-acting valve core solenoid valve 100 of this application not only reduces the overall space occupied but also reduces the vibration caused by the direct impact of airflow on the elastic element 40, preventing large-scale vibration of the elastic element 40 from generating noise and improving the reliability and comfort of the product. At the same time, the cooperation of each component enables the solenoid valve 100 to achieve unidirectional flow and flexible switching between three states: air intake, air exhaust, and pressure holding, effectively improving the stability and practicality of the product.

[0068] like Figures 6-8 As shown, the solenoid valve 100 according to the second embodiment of the present invention differs from that of the first embodiment in that the second valve core 30 is provided with a receiving groove 34, and the elastic member 40 is located in the receiving groove 34 and abuts against the bottom wall of the receiving groove 34 and the flexible member 60 on the first valve core 20. The elastic member 40 is shielded by the groove wall of the receiving groove 34 to reduce the vibration of the elastic member 40 and reduce the generation of noise.

[0069] Other configurations and operations of the dual-acting valve core solenoid valve 100 for the automotive seat pneumatic system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative representations of the above terms... The description does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A double-acting valve core solenoid valve (100) for a pneumatic system of an automotive seat, characterized in that, include: Valve seat (10), the valve seat (10) having a valve cavity (11) and an intake passage (12), a communication passage (13) and an exhaust passage (14) communicating with the valve cavity (11); A first valve core (20) and a second valve core (30) are arranged in the valve cavity (11). The first valve core (20) is movable in a set direction to block or open the exhaust passage (14), and the second valve core (30) is movable in the set direction to block or open the intake passage (12). An elastic element (40) is located between the first valve core (20) and the second valve core (30). The elastic element (40) is used to apply a driving force to the first valve core (20) to block the exhaust passage (14) and to apply a driving force to the second valve core (30) to block the intake passage (12). An electromagnetic coil (50) is disposed outside the valve seat (10) and at least partially surrounds the first valve core (20).

2. The dual-acting valve core solenoid valve (100) for automotive seat pneumatic systems according to claim 1, characterized in that, The first valve core (20) and / or the second valve core (30) are provided with a receiving groove (34) recessed along the set direction, and the elastic element (40) is partially located in the receiving groove (34).

3. The dual-acting valve core solenoid valve (100) for automotive seat pneumatic systems according to claim 1, characterized in that, The first valve core (20) and / or the second valve core (30) include a small diameter section (32) and a large diameter section (33) arranged and connected along a set direction. The outer diameter of the small diameter section (32) is smaller than the outer diameter of the large diameter section (33). The elastic element (40) is sleeved on the small diameter section (32).

4. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 1, characterized in that, One of the first valve core (20) and the second valve core (30) is connected to one end of the elastic member (40), and the other is provided with a flexible member (60), the other end of the elastic member (40) being connected to the flexible member (60).

5. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 1, characterized in that, A gas flow channel is formed between the first valve core (20) and the cavity wall of the valve chamber (11), and between the second valve core (30) and the cavity wall of the valve chamber (11). The gas flow channel connects the space of the first valve core (20) facing the connecting channel (13) and the space of the second valve core (30) facing the air intake channel (12).

6. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 5, characterized in that, The outer peripheral surface of the first valve core (20) is provided with a plurality of first grooves (21) arranged at intervals along the circumference. The first grooves (21) extend along the set direction. The outer peripheral surface of the second valve core (30) is provided with a plurality of second grooves (31) arranged at intervals along the circumference. The second grooves (31) extend along the set direction. The gas flow channel is formed at the first groove (21) and the second groove (31).

7. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 1, characterized in that, In the specified direction, the length of the electromagnetic coil (50) is greater than the length of the first valve core (20), and the second valve core (30) is at least partially located within the area enclosed by the electromagnetic coil (50); and / or, The first valve core (20) has a first sealing element (71) at one end facing the exhaust passage (14), the first sealing element (71) being used to seal against the opening of the exhaust passage (14); and / or, The second valve core (30) is provided with a second seal (72) at one end facing the air intake channel (12), and the second seal (72) is used to seal and cooperate with the channel opening of the air intake channel (12).

8. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 1, characterized in that, The valve seat (10) includes a seat body (15) and an air inlet (16). The seat body (15) defines the valve cavity (11), the communication channel (13), and the exhaust channel (14). One end of the seat body (15) has a valve mounting port (151) communicating with the valve cavity (11). The air inlet (16) defines the air inlet channel (12). The air inlet (16) is inserted into the valve mounting port (151) and is sealed to the seat body (15).

9. The dual-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to claim 8, characterized in that, The air intake passage (12) extends in a straight line or in a bend; and / or, The inlet end of the air intake (16) is used to connect with the air pipe, and the outer peripheral surface of the inlet end of the air intake (16) is provided with a locking protrusion (161) or a fourth sealing element (74) for sealing cooperation with the air pipe.

10. The double-acting valve core solenoid valve (100) for an automotive seat pneumatic system according to any one of claims 1-9, characterized in that, The solenoid valve (100) has an intake state, a pressure holding state, and an exhaust state, wherein, In the intake state, the second valve core (30) opens the intake passage (12) under the intake pressure of the intake passage (12), and the first valve core (20) blocks the exhaust passage (14) so ​​that the intake passage (12) is connected to the communication passage (13) through the valve chamber (11); In the pressure-holding state, under the action of the elastic element (40), the second valve core (30) blocks the air intake passage (12), and the first valve core (20) blocks the exhaust passage (14). In the exhaust state, the first valve core (20) opens the exhaust passage (14) under the action of the electromagnetic coil (50), and the second valve core (30) blocks the intake passage (12) under the action of the elastic element (40) and the electromagnetic coil (50), so that the connecting passage (13) is connected to the exhaust passage (14) through the valve chamber (11).

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