Electromagnetic valve, controller, seat assembly and automobile

Abstract

The utility model relates to an electromagnetic valve, controller, seat assembly and car, the electromagnetic valve includes valve body and electromagnetic subassembly, the valve body includes valve body, air inlet portion and air outlet portion, the air inlet portion is equipped with the air inlet passage suitable for connecting air source, the air outlet portion is equipped with the air outlet passage, the inside of valve body is equipped with the accommodation cavity, the accommodation cavity is equipped with the air inlet passage suitable for connecting the air source, and the air outlet passage is equipped with the air outlet passage suitable for connecting the air source. And the accommodating cavity is communicated with the air outlet channel. According to the electromagnetic valve provided by the utility model, the pretightening force of the spring is reasonably designed based on the maximum atmospheric pressure provided by the gas source, so that the thrust of the spring to the moving iron assembly is always greater than or equal to the thrust of gas to the moving iron assembly when the coil is powered off. Therefore, when the coil is powered off, the electromagnetic valve can be kept closed stably and cannot be opened by air pressure, and the electromagnetic valve is stable and effective.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a solenoid valve, a controller, a seat assembly and a car. Background Art

[0002] With the continuous advancement of automotive electronics, solenoid valves are increasingly used in passenger cars, becoming a crucial component of automotive electronics technology. While traditional mechanical valves rely on mechanical force to operate, solenoid valves can be opened and closed using electrical signals. To enhance vehicle comfort and reduce driver fatigue, many vehicles are now equipped with massage seats to improve both overall comfort and driver satisfaction.

[0003] In the related art, when the power is off, the air pressure provided by the air pump may open the solenoid valve, causing the solenoid valve to fail. Utility Model Content

[0004] The technical problem to be solved by the present invention is: for the solenoid valve in the related art, when the power is off, the air pressure provided by the air pump may open the solenoid valve, causing the solenoid valve to fail. A solenoid valve, a controller, a seat assembly and a car are provided.

[0005] In order to solve the above technical problems, on the one hand, the utility model provides a solenoid valve, comprising a valve body and a solenoid assembly, wherein the valve body comprises a valve body, an air inlet portion and an air outlet portion, wherein the air inlet portion is provided with an air inlet passage suitable for connecting to an air source, the air outlet portion is provided with an air outlet passage, and the interior of the valve body is provided with an accommodating cavity, wherein the accommodating cavity is communicated with the air outlet passage;

[0006] The electromagnetic assembly includes a coil, a moving iron assembly, a fixed iron core and a spring, the coil being sleeved on the outer periphery of the valve body, the moving iron assembly being slidably disposed in the accommodating cavity, and the fixed iron core being fixed in the accommodating cavity; the fixed iron core being disposed on a side of the moving iron assembly away from the outlet of the air inlet duct, an exhaust hole being provided in the interior of the fixed iron core and extending axially therethrough, a spring supporting surface being provided on the inner wall of the exhaust hole, one end of the spring being in contact with the spring supporting surface, and the other end being in contact with the moving iron assembly, and the distance between the spring supporting surface and the entrance of the exhaust hole being the depth of the spring supporting surface;

[0007] When the coil is de-energized, the spring pushes the movable iron assembly toward the air inlet duct, and the movable iron assembly blocks the outlet of the air inlet duct and opens the inlet of the exhaust hole, thereby blocking the outlet of the air inlet duct and the inlet of the air outlet duct;

[0008] When the coil is energized, the moving iron assembly moves toward the fixed iron core and compresses the spring, thereby opening the outlet of the air inlet duct and blocking the inlet of the exhaust hole, so that the outlet of the air inlet duct is connected to the inlet of the air outlet duct;

[0009] When the coil is de-energized, the solenoid valve meets the following conditions:

[0010] K(L0-X-X0) / S*P≥1; wherein K is the stiffness of the spring, L0 is the free length of the spring, X is the depth of the spring support surface, X0 is the distance between the moving iron assembly and the fixed iron core, S is the area of ​​the outlet of the air inlet duct, and P is the maximum air pressure provided by the air source.

[0011] According to the solenoid valve of the present invention, when the coil is de-energized, the spring pushes the movable iron assembly toward the air inlet, which in turn blocks the outlet of the air inlet, thereby blocking both the outlet and the entrance of the air outlet. The spring preload is appropriately designed based on the maximum air pressure that the air source can provide, ensuring that when the coil is de-energized, the spring's thrust on the movable iron assembly is always greater than or equal to the thrust of the air on the movable iron assembly. This ensures that when the coil is de-energized, the solenoid valve remains stably closed and is not opened by air pressure, ensuring a stable and effective solenoid valve.

[0012] Optionally, the moving iron assembly includes a moving iron core, a first seal, and a second seal, wherein the first seal is mounted at one axial end of the moving iron core and faces the outlet of the air inlet duct, and the second seal is mounted at the other axial end of the moving iron core and faces the inlet of the exhaust hole, and the other end of the spring abuts against the second seal;

[0013] When the coil is de-energized, the first sealing member blocks the outlet of the air inlet duct and the second sealing member opens the inlet of the exhaust hole;

[0014] When the coil is energized, the first sealing member opens the outlet of the air inlet passage and the second sealing member blocks the inlet of the exhaust hole.

[0015] Optionally, the exhaust hole is a circular stepped hole, and the exhaust hole includes a first hole segment and a second hole segment, and the second hole segment is connected to an end of the first hole segment away from the moving iron assembly;

[0016] The inner diameter of the first hole segment is greater than the inner diameter of the second hole segment, so as to form the spring supporting surface at the connection between the first hole segment and the second hole segment.

[0017] Optionally, a first sealing groove is provided on the outer periphery of the fixed iron core;

[0018] It also includes a first sealing ring, which is sleeved in the first sealing groove, and the outer ring of the first sealing ring is interference fit with the cavity wall of the accommodating cavity.

[0019] Optionally, the inlet of the air inlet is suitable for connecting to an air source, and the outlet of the air inlet is connected to the accommodating cavity;

[0020] The inlet of the air outlet is communicated with the accommodating cavity, and the outlet of the air outlet is suitable for connecting to an airbag.

[0021] Optionally, the valve body, the air inlet and the air outlet are all tubular.

[0022] Optionally, the air outlet extends along the axis of the air outlet portion, and the inlet of the air outlet is located at the junction of the accommodating cavity and the air outlet portion.

[0023] Optionally, the air inlet passage includes a first flow passage and a second flow passage, the first flow passage extends along the axis of the air inlet portion, the second flow passage extends along the axis of the valve body, one end of the second flow passage is connected to the first flow passage, and the other end of the second flow passage is an outlet of the air inlet passage;

[0024] The first flow channel runs through the air inlet portion, one end of the first flow channel is the inlet of the air inlet channel, and the other end of the first flow channel is a transfer interface; the transfer interface is closed, or the transfer interface is suitable for connecting to the inlet of the air inlet channel of another solenoid valve.

[0025] Optionally, the valve body further includes a transition portion arranged on the outer periphery of the valve body and a connector arranged on the transition portion, the connector is electrically connected to the coil, and one end of the connector is suitable for electrically connecting to a PCB board.

[0026] Optionally, a slot is provided on the adapter portion, the slot is separated from the accommodating cavity, the connector is plugged into the slot, and one end of the connector extends out of the slot and is suitable for electrical connection with the PCB board.

[0027] Optionally, a yoke is further included, wherein the yoke includes a limiting portion, and the limiting portion is installed on the adapter portion so that the yoke is fixed to the outside of the valve body.

[0028] Optionally, the yoke further includes a main body and a plate portion, the main body is connected between the limiting portion and the plate portion, the transition portion is located at one axial end of the valve body close to the air inlet portion, and the plate portion is located at the other axial end of the valve body.

[0029] Optionally, a card slot is provided on the adapter portion, the card slot surrounds the valve body, the limiting portion is an elastic card connector with one end open, the inner wall surface of the elastic card connector matches the bottom surface shape of the card slot, and the elastic card connector is clamped in the card slot.

[0030] Optionally, the elastic clamping member includes two clamping feet arranged opposite to each other, one end of the clamping foot is connected to the main body, and the other end of the clamping foot is formed into a cantilever structure and inserted into the clamping slot;

[0031] A bayonet is formed between the two clamping feet. When the elastic clamping member is clamped into the clamping groove, the two clamping feet are deformed in opposite directions so that the valve body is inserted into the bayonet.

[0032] Optionally, the plate portion includes two oppositely arranged insertion rods, one end of the insertion rod is connected to the main body portion, and the other end of the insertion rod is suspended in the air;

[0033] An escape opening is formed between the two insertion rods, and an escape groove exposing the valve body is provided on the outer periphery of the fixed iron core, and the bottom wall of the escape groove penetrates into the escape opening.

[0034] Optionally, a first flange and a second flange are respectively provided on both axial sides of the avoidance groove of the fixed iron core, and the plate portion is located between the first flange and the second flange to limit the displacement of the plate portion along the axial direction of the fixed iron core.

[0035] Optionally, a second sealing groove is provided on the outer periphery of the end portion of the fixed iron core exposed to the valve body;

[0036] It also includes a second sealing ring, which is sleeved in the second sealing groove. The end of the valve body close to the fixed iron core can be connected to a normally closed valve, and the outer ring of the second sealing ring is suitable for sealing with the normally closed valve.

[0037] Optionally, a third sealing ring is further included, which is sleeved on the outside of the air inlet part, and the outer ring of the third sealing ring is suitable for interference fitting with the inlet of the air inlet duct of another solenoid valve to connect the air inlets of two adjacent solenoid valves.

[0038] On the other hand, an embodiment of the present invention further provides a controller, comprising a housing, a PCB board and the above-mentioned solenoid valve, wherein the coil is electrically connected to the PCB board, and the PCB board and the solenoid valve are arranged in the housing.

[0039] Optionally, a plurality of the solenoid valves are provided, and the plurality of solenoid valves are arranged in sequence along a preset direction, and the air intake duct has a transfer interface communicating with the inlet of the air intake duct;

[0040] The inlet of the air inlet of the first solenoid valve is suitable for connecting to the air source. Among the adjacent solenoid valves, the adapter of the air inlet of the previous solenoid valve is connected to the inlet of the air inlet of the next solenoid valve, and the adapter of the air inlet of the last solenoid valve is closed.

[0041] The controller provided in the embodiment of the present invention has all the advantages of the above-mentioned solenoid valve.

[0042] On the other hand, an embodiment of the present invention further provides a seat assembly, including a seat, an airbag and the above-mentioned controller, wherein the airbag is arranged on the seat, and the outlet of the air outlet duct of the solenoid valve is connected to the airbag to enable inflation and deflation of the airbag.

[0043] Optionally, a plurality of the solenoid valves are provided, and the plurality of solenoid valves are arranged in sequence along a preset direction, and the air intake duct has a transfer interface communicating with the inlet of the air intake duct;

[0044] The inlet of the air inlet of the first solenoid valve is suitable for connecting to an air source. In adjacent solenoid valves, the adapter of the air inlet of the previous solenoid valve is connected to the inlet of the air inlet of the next solenoid valve, and the adapter of the air inlet of the last solenoid valve is closed.

[0045] There are multiple airbags, and the outlet of the air outlet of each solenoid valve is connected to the corresponding airbag;

[0046] At least part of the airbag is arranged on the seat cushion of the seat.

[0047] The seat assembly provided by the embodiment of the present invention has all the advantages of the above-mentioned solenoid valve.

[0048] On the other hand, an embodiment of the present invention further provides an automobile, comprising the above-mentioned seat assembly.

[0049] The embodiment of the present invention also provides a car having all the advantages of the above-mentioned solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic diagram of a solenoid valve provided by an embodiment of the present utility model;

[0051] Figure 2 This is an exploded view of a solenoid valve provided in one embodiment of the present utility model;

[0052] Figure 3 This is a three-dimensional diagram of a valve body of a solenoid valve provided by one embodiment of the present utility model;

[0053] Figure 4 This is a side view of a valve body of a solenoid valve provided by one embodiment of the present utility model;

[0054] Figure 5 It is along Figure 5 Cross-sectional view in the AA direction;

[0055] Figure 6 It is a cross-sectional view of a fixed iron core of a solenoid valve provided in one embodiment of the present utility model.

[0056] The reference numerals in the specification are as follows:

[0057] 1. Valve body; 11. Valve body; 111. Accommodating chamber; 12. Air inlet; 113. Connector; 121. Air inlet; 1211. Inlet entrance of air inlet; 1212. Inlet outlet of air inlet; 1213. First flow channel; 1214. Second flow channel; 1215. Adapter; 13. Air outlet; 131. Air outlet; 1311. Inlet entrance of air outlet; 1312. Inlet outlet; 14. Adapter; 141. Slot; 142. Card slot; 15. Connector; 16. Limit plate;

[0058] 2. Yoke; 21. Main body; 22. Limiting part; 221. Clamping foot; 222. Clamping mouth; 23. Plate; 231. Inserting rod; 232. Avoidance mouth;

[0059] 3. Coil;

[0060] 4. Moving iron assembly; 40. Moving iron core; 41. First sealing member; 42. Second sealing member;

[0061] 5. Fixed iron core; 51. Exhaust hole; 510. Exhaust hole entrance; 511. First hole section; 512. Second hole section; 513. Spring support surface; 52. First sealing groove; 53. Avoidance groove; 54. First flange; 55. Second flange; 56. Second sealing groove;

[0062] 6. Spring; 7. First sealing ring; 8. Second sealing ring; 9. Third sealing ring. DETAILED DESCRIPTION

[0063] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0064] See also Figures 1 to 6An electromagnetic valve provided by one embodiment of the present invention includes a valve body 1 and an electromagnetic assembly. The valve body 1 includes a valve body 11, an air inlet 12, and an air outlet 13. The air inlet 12 and the air outlet 13 are connected to the same side of the valve body 11. The air inlet 12 is provided with an air inlet 121 suitable for connecting to an air source, and the air outlet 13 is provided with an air outlet 131. The valve body 11 is provided with an accommodating chamber 111 inside, and the accommodating chamber 111 is communicated with the air outlet 13. The electromagnetic assembly includes a coil 3, a moving iron assembly, a fixed iron core 5, and a spring 6. The coil 3 is sleeved on the outer circumference of the valve body 11. The moving iron assembly is slidably provided in the accommodating chamber 111. The fixed iron core 5 is fixed in the accommodating chamber 111. The fixed iron core 5 is disposed on a side of the movable iron assembly away from the outlet 1212 of the air inlet duct 121. An exhaust hole 51 extending axially therethrough is disposed within the fixed iron core 5. A spring support surface 513 is disposed on the inner wall of the exhaust hole 51. One end of the spring 6 abuts the spring support surface 513, while the other end abuts the movable iron assembly. The distance between the spring support surface 513 and the inlet 510 of the exhaust hole 51 is the spring support surface depth. That is, the spring support surface 513 is parallel to the surface where the inlet 510 of the exhaust hole 51 is located, and the spring support surface depth is the vertical distance between the spring support surface 513 and the surface where the inlet 510 of the exhaust hole 51 is located.

[0065] When the coil 3 is powered off, the spring 6 pushes the moving iron assembly toward the air inlet duct 121, and the moving iron assembly blocks the outlet 1212 of the air inlet duct 121 and opens the inlet 510 of the exhaust hole 51, so as to block the outlet 1212 of the air inlet duct 121 and the inlet 1311 of the air outlet duct 131; when the coil 3 is powered on, the moving iron assembly moves toward the fixed iron core 5 and compresses the spring 6, and the moving iron assembly opens the outlet 1212 of the air inlet duct 121 and blocks the inlet 510 of the exhaust hole 51, so that the outlet 1212 of the air inlet duct 121 is connected to the inlet 1311 of the air outlet duct 131.

[0066] When the coil 3 is de-energized, the solenoid valve meets the following conditions:

[0067] K(L0-X-X0) / S*P≥1; wherein, K is the stiffness of the spring 6, L0 is the free length of the spring 6, X is the depth of the spring support surface, X0 is the distance between the moving iron assembly and the fixed iron core 5, S is the area of ​​the outlet 1212 of the air inlet duct 121, and P is the maximum air pressure provided by the air source (such as an air pump).

[0068] In the solenoid valve of this embodiment, the preload force of spring 6 is rationally designed based on the maximum air pressure provided by the air source. This ensures that when coil 3 is de-energized, the thrust exerted by spring 6 on the movable iron assembly is always greater than or equal to the thrust exerted by the air on the movable iron assembly. This ensures that when coil 3 is de-energized, the solenoid valve remains stably closed and is not opened by air pressure, ensuring a stable and effective operation.

[0069] In one embodiment, see Figure 2 The movable iron assembly 4 includes a movable iron core 40, a first seal 41, and a second seal 42. The first seal 41 is mounted at one axial end of the movable iron core 40 and faces the outlet 1212 of the air inlet duct 121. The second seal 42 is mounted at the other axial end of the movable iron core 40 and faces the inlet 510 of the exhaust hole 51. The other end of the spring 6 abuts against the second seal 42. When the coil 3 is de-energized, the first seal 41 blocks the outlet 1212 of the air inlet duct 121, and the second seal 42 opens the inlet 510 of the exhaust hole 51. When the coil 3 is energized, the first seal 41 opens the outlet 1212 of the air inlet duct 121, and the second seal 42 blocks the inlet 110 of the exhaust hole 51.

[0070] The first sealing member 41 and the second sealing member 42 may adopt the same structure to share a mold and reduce costs.

[0071] See also Figure 2 The first sealing member 41 and the second sealing member 42 are sealing plugs.

[0072] However, in other embodiments, the first sealing member 41 and the second sealing member 42 may also be sealed by filler or potting.

[0073] In one embodiment, see Figure 6 The exhaust hole 51 is a circular stepped hole and includes a first hole section 511 and a second hole section 512. The second hole section 512 is connected to the end of the first hole section 511 away from the dynamic assembly 4. The inner diameter of the first hole section 511 is larger than the inner diameter of the second hole section 512, so that a spring support surface 513 is formed at the connection between the first hole section 511 and the second hole section 512. One end of the spring 6 abuts the spring support surface 513, and the other end abuts the second sealing member 42. The processing depth of the spring support surface 513 can be adjusted according to the different working air pressure environments of the solenoid valve, thereby adjusting the preload force of the solenoid valve to meet different working air pressure environments. At the same time, the spring support surface 513 also serves to limit the spring 6, ensuring the preload force of the spring 6 during the compression process.

[0074] In one embodiment, see Figure 2 and Figure 6 The fixed core 5 is provided with a first sealing groove 52 on its outer circumference and a first sealing ring 7, which is inserted into the first sealing groove 52. The outer ring of the first sealing ring 7 forms an interference fit with the wall of the accommodating cavity 111. This prevents the fixed core 5 from being ejected from the passive core 4 during operation.

[0075] In one embodiment, see Figure 1 and Figure 5 The inlet 1211 of the air inlet 121 is adapted to connect to an air source, which may be an air pump. The inlet 1211 of the air inlet 121 can be connected to the air pump via a hose. The outlet 1212 of the air inlet 121 is connected to the accommodating chamber 111. The inlet 1311 of the air outlet 131 communicates with the accommodating chamber 111, and the outlet 1312 of the air outlet 131 is adapted to connect to an airbag. For example, the outlet 1312 of the air outlet 131 can connect to the airbag via a trachea.

[0076] In one embodiment, the valve body 11 , the air inlet 12 and the air outlet 13 are all tubular, and the axis of the valve body 11 and the axis of the air outlet 13 are parallel and spaced apart.

[0077] In one embodiment, the axis of the air inlet portion 12 is perpendicular to the axis of the air outlet portion 13. The extension direction of the main body portion 21 is parallel to the axis of the valve body 11.

[0078] In one embodiment, see Figure 5 The air outlet 131 extends along the axis of the air outlet portion 13 , and the inlet 1311 of the air outlet 131 is located at the junction of the accommodating cavity 111 and the air outlet portion 13 .

[0079] In one embodiment, see Figure 3 and Figure 5 The air inlet passage 121 includes a first flow passage 1213 and a second flow passage 1214. The first flow passage 1213 extends along the axis of the air inlet portion 12, and the second flow passage 1214 extends along the axis of the valve body 11. One end of the second flow passage 1214 is connected to the first flow passage 1213, and the other end of the second flow passage 1214 serves as the outlet 1212 of the air inlet passage 121. The first flow passage 1213 passes through the air inlet portion 12, one end of the first flow passage 1213 serves as the inlet of the air inlet passage 121, and the other end of the first flow passage 1213 serves as a transfer port 1215. The transfer port 1215 is closed, or alternatively, it is adapted to connect to the inlet 1211 of the air inlet passage 121 of another solenoid valve.

[0080] In one embodiment, see Figures 1 to 3The valve body 1 further includes a connecting portion 14 disposed on the outer periphery of the valve body 11 and a connector 15 disposed on the connecting portion 14. The connector 15 is electrically connected to the coil 3, and one end of the connector 15 is adapted to be electrically plugged into a PCB. Specifically, the connector 15 is connected between the coil 3 and the PCB to control the on / off state of the coil 3.

[0081] In one embodiment, see Figures 1 to 3 The adapter portion 14 is provided with a slot 141, which is separated from the accommodating cavity 111. The connector 15 is inserted into the slot 141. One end of the connector 15 extends out of the slot 141 and is suitable for electrically connecting to the PCB board. The connector 15 is a pin or a terminal (e.g., a fisheye terminal).

[0082] In one embodiment, see Figures 1 to 2 , also includes a yoke 2, the yoke 2 includes a main body 21, a limiting part 22 and a plate part 23, the main body 21 is connected between the limiting part 22 and the plate part 23, the adapter part 14 is located at one axial end of the valve body 11 close to the air intake part 12, the limiting part 22 is installed on the adapter part 14, so that the yoke 2 is fixed to the outside of the valve body 1, ensuring that the yoke 2 will not fall off during the movement of the car. The plate part 23 is located at the other axial end of the valve body 11, and the plate part 23 can be spaced apart from the other axial end of the valve body 11. Along the axial direction of the coil 3, the coil 3 is located between the limiting part 22 and the main body 23; the yoke 2 is a magnetic conductive part, so that when the coil 3 is energized, the yoke 2 can enhance the electromagnetic force of the solenoid valve.

[0083] In one embodiment, see Figure 3 A limiting plate 16 protruding radially is provided at one end of the valve body 11 away from the adapter 14 , and the coil 3 is located between the adapter 14 and the limiting plate 16 along its axial direction to limit the axial movement of the coil 3 .

[0084] In one embodiment, see 1 to Figure 3 A card slot 142 is provided on the adapter part 14, and the card slot 142 surrounds the valve body 11. The limiting part 22 is an elastic card connector with one end open. The inner wall surface of the elastic card connector matches the bottom surface shape of the card slot 142, and the elastic card connector is clamped in the card slot 142.

[0085] In one embodiment, see Figures 1 to 2The elastic clamping member includes two opposing clamping feet 221, one end of which is connected to the main body 21, and the other end of which is formed into a cantilever structure and inserted into the clamping slot 142. A clamping hole 222 is formed between the two clamping feet 221. When the elastic clamping member is clamped into the clamping slot 112, the two clamping feet 221 deform in opposite directions, allowing the valve body 11 to pass through the clamping hole 222. In this way, the yoke 2 is clamped and fixed to the valve body 1.

[0086] However, in other embodiments, the limiting portion 22 may also be fixed to the outside of the valve body 1 by bolt connection, riveting, or the like.

[0087] In one embodiment, see Figures 1 to 2 The plate portion 12 includes two opposing rods 231, one end of which is connected to the main body 21, and the other end of which is suspended in the air. A relief opening 232 is formed between the two rods 231. A relief groove 53 is provided on the outer periphery of the fixed iron core 5, exposing the valve body 1. The bottom wall of the relief groove 53 penetrates the relief opening 232. The relief groove 232 is provided with a first flange 54 and a second flange 55 on both sides of the axial direction of the fixed iron core 5. The plate portion 23 is located between the first flange 54 and the second flange 55 to limit the axial displacement of the plate portion 23 along the fixed iron core 5. In this way, the limiting portion 22 and the plate portion 23 of the yoke 2 are both axially limited to ensure that the yoke 2 does not move axially.

[0088] In one embodiment, see Figure 2 and Figure 6 A second sealing groove 56 is provided on the outer periphery of the end of the fixed iron core 5 exposed from the valve body 1; it also includes a second sealing ring 8, which is sleeved in the second sealing groove 56. The end of the valve body 1 close to the support iron core 5 can be connected to a normally closed valve, and the outer ring of the second sealing ring 8 is suitable for sealing with the normally closed valve.

[0089] In one embodiment, see Figure 1 and Figure 2 , further comprising a third sealing ring 9, said third sealing ring 9 being sleeved on the outside of said air inlet portion 12, and the outer ring of said third sealing ring 9 being adapted to be interference fitted with the inlet 1212 of the air inlet 121 of another said solenoid valve, so as to connect the air inlets 121 of two adjacent said solenoid valves. In this way, a plurality of solenoid valves can be connected in series. The inlet of the air inlet 121 of the first solenoid valve is the main inlet. After the gas enters through the main inlet, it enters the air inlets 121 of the plurality of solenoid valves. By controlling the opening state of each solenoid valve, any solenoid valve can be selectively ventilated.

[0090] The first sealing ring 7, the second sealing ring 8 and the third sealing ring 9 can adopt the same structure to share a mold and reduce costs.

[0091] On the other hand, an embodiment of the present invention further provides a controller, comprising a housing, a PCB board and the solenoid valve of the above embodiment, wherein the coil 3 is electrically connected to the PCB board, and the PCB board and the solenoid valve are arranged in the housing.

[0092] Specifically, the coil 3 is electrically connected to the PCB board via the connector 15 , so that the PCB board can control the on and off of the coil 3 .

[0093] In one embodiment, a plurality of solenoid valves are provided, and the plurality of solenoid valves are arranged sequentially along a predetermined direction. The air inlet 121 has a transfer port 1215 connected to the inlet 1211 of the air inlet 121. The inlet 1211 of the first solenoid valve is adapted to be connected to an air source. For adjacent solenoid valves, the transfer port 1215 of the air inlet 121 of the preceding solenoid valve is connected to the inlet 1211 of the following solenoid valve, and the transfer port 1215 of the air inlet 121 of the following solenoid valve is closed. In this way, the plurality of solenoid valves can be connected in series.

[0094] The controller provided in the embodiment of the present invention has all the advantages of the above-mentioned solenoid valve.

[0095] In another aspect, an embodiment of the present invention further provides a seat assembly comprising a seat, an airbag, and the aforementioned controller. The airbag is disposed on the seat, and the outlet of the air outlet passage 13 of the solenoid valve is connected to the airbag to enable inflation and deflation of the airbag. Inflation and deflation of the airbag can cause the airbag to repeatedly expand and contract, thereby achieving a seat massage function.

[0096] There are multiple airbags, and the air outlet 13 of each solenoid valve is connected to the corresponding airbag; at least some of the airbags are arranged on the seat cushion, that is, at least the seat cushion has a massage function.

[0097] More preferably, some of the airbags are arranged on the seat cushion of the seat, and another part of the airbags are arranged in the seat backrest to achieve a back massage function. Multiple airbags can be arranged on the seat cushion, and multiple airbags can also be arranged on the seat backrest.

[0098] The seat assembly provided by the embodiment of the present invention has all the advantages of the above-mentioned solenoid valve.

[0099] On the other hand, an embodiment of the present invention further provides an automobile, comprising the seat assembly of the above embodiment.

[0100] The embodiment of the present invention also provides a car having all the advantages of the above-mentioned solenoid valve.

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solenoid valve, characterized in that: The valve comprises a valve body and an electromagnetic assembly, wherein the valve body comprises a valve body, an air inlet portion and an air outlet portion, wherein the air inlet portion is provided with an air inlet passage suitable for connecting to an air source, the air outlet portion is provided with an air outlet passage, and the interior of the valve body is provided with an accommodating cavity, wherein the accommodating cavity is communicated with the air outlet passage; The electromagnetic assembly includes a coil, a moving iron assembly, a fixed iron core and a spring, the coil being sleeved on the outer periphery of the valve body, the moving iron assembly being slidably disposed in the accommodating cavity, and the fixed iron core being fixed in the accommodating cavity; the fixed iron core being disposed on a side of the moving iron assembly away from the outlet of the air inlet duct, an exhaust hole being provided in the interior of the fixed iron core and extending axially therethrough, a spring supporting surface being provided on the inner wall of the exhaust hole, one end of the spring being in contact with the spring supporting surface, and the other end being in contact with the moving iron assembly, and the distance between the spring supporting surface and the entrance of the exhaust hole being the depth of the spring supporting surface; When the coil is de-energized, the spring pushes the movable iron assembly toward the air inlet duct, and the movable iron assembly blocks the outlet of the air inlet duct and opens the inlet of the exhaust hole, thereby blocking the outlet of the air inlet duct and the inlet of the air outlet duct; When the coil is energized, the moving iron assembly moves toward the fixed iron core and compresses the spring, thereby opening the outlet of the air inlet duct and blocking the inlet of the exhaust hole, so that the outlet of the air inlet duct is connected to the inlet of the air outlet duct; When the coil is de-energized, the solenoid valve meets the following conditions: K(L0-X-X0) / S*P≥1; wherein K is the stiffness of the spring, L0 is the free length of the spring, X is the depth of the spring support surface, X0 is the distance between the moving iron assembly and the fixed iron core, S is the area of ​​the outlet of the air inlet duct, and P is the maximum air pressure provided by the air source.

2. The solenoid valve according to claim 1, characterized in that The moving iron assembly includes a moving iron core, a first seal, and a second seal. The first seal is mounted on one axial end of the moving iron core and faces the outlet of the air inlet duct. The second seal is mounted on the other axial end of the moving iron core and faces the inlet of the exhaust hole. The other end of the spring abuts against the second seal. When the coil is de-energized, the first sealing member blocks the outlet of the air inlet duct and the second sealing member opens the inlet of the exhaust hole; When the coil is energized, the first sealing member opens the outlet of the air inlet passage and the second sealing member blocks the inlet of the exhaust hole.

3. The solenoid valve according to claim 1, characterized in that The exhaust hole is a circular stepped hole, and includes a first hole segment and a second hole segment, wherein the second hole segment is connected to an end of the first hole segment away from the moving iron assembly; The inner diameter of the first hole segment is greater than the inner diameter of the second hole segment, so as to form the spring supporting surface at the connection between the first hole segment and the second hole segment.

4. The solenoid valve according to claim 2, characterized in that A first sealing groove is provided on the outer periphery of the fixed iron core; It also includes a first sealing ring, which is sleeved in the first sealing groove, and the outer ring of the first sealing ring is interference fit with the cavity wall of the accommodating cavity.

5. The solenoid valve according to claim 1, characterized in that The inlet of the air inlet is suitable for connecting to an air source, and the outlet of the air inlet is connected to the accommodating cavity; The inlet of the air outlet is communicated with the accommodating cavity, and the outlet of the air outlet is suitable for connecting to an airbag.

6. The solenoid valve according to claim 1, characterized in that The valve body, the air inlet and the air outlet are all in a tubular shape.

7. The solenoid valve according to claim 6, characterized in that The air outlet extends along the axis of the air outlet portion, and the inlet of the air outlet is located at the junction of the accommodating cavity and the air outlet portion.

8. The solenoid valve according to claim 6, characterized in that The air inlet passage includes a first flow passage and a second flow passage, the first flow passage extends along the axis of the air inlet portion, the second flow passage extends along the axis of the valve body, one end of the second flow passage is connected to the first flow passage, and the other end of the second flow passage is an outlet of the air inlet passage; The first flow channel runs through the air inlet portion, one end of the first flow channel is the inlet of the air inlet channel, and the other end of the first flow channel is a transfer interface; the transfer interface is closed, or the transfer interface is suitable for connecting to the inlet of the air inlet channel of another solenoid valve.

9. The solenoid valve according to claim 1, characterized in that The valve body further includes a transition portion provided on the outer periphery of the valve body and a connector provided on the transition portion. The connector is electrically connected to the coil, and one end of the connector is suitable for being electrically plugged into a PCB board.

10. The solenoid valve according to claim 9, characterized in that The adapter portion is provided with a slot, the slot is separated from the accommodating cavity, the connector is plugged into the slot, one end of the connector extends out of the slot and is suitable for electrical connection with the PCB board.

11. The solenoid valve according to claim 9, characterized in that A yoke is also included. The yoke includes a limiting portion. The limiting portion is installed on the adapter portion so that the yoke is fixed to the outside of the valve body.

12. The solenoid valve according to claim 9, characterized in that The yoke also includes a main body and a plate portion, the main body is connected between the limiting portion and the plate portion, the transition portion is located at one axial end of the valve body close to the air inlet portion, and the plate portion is located at the other axial end of the valve body.

13. The solenoid valve according to claim 11, characterized in that The adapter portion is provided with a slot surrounding the valve body. The limiting portion is an elastic clip with one end open. The inner wall surface of the elastic clip matches the bottom surface shape of the slot, and the elastic clip is clipped into the slot.

14. The solenoid valve according to claim 13, characterized in that The elastic clamping member includes two clamping feet arranged opposite to each other, one end of the clamping foot is connected to the main body, and the other end of the clamping foot is formed into a cantilever structure and inserted into the clamping slot; A bayonet is formed between the two clamping feet. When the elastic clamping member is clamped into the clamping groove, the two clamping feet are deformed in opposite directions so that the valve body is inserted into the bayonet.

15. The solenoid valve according to claim 12, characterized in that The plate portion includes two oppositely arranged insertion rods, one end of the insertion rod is connected to the main body portion, and the other end of the insertion rod is suspended in the air; An escape opening is formed between the two insertion rods, and an escape groove exposing the valve body is provided on the outer periphery of the fixed iron core, and the bottom wall of the escape groove penetrates into the escape opening.

16. The solenoid valve according to claim 15, characterized in that The avoidance groove is provided with a first flange and a second flange on both sides of the axial direction of the fixed iron core, respectively. The plate portion is located between the first flange and the second flange to limit the displacement of the plate portion along the axial direction of the fixed iron core.

17. The solenoid valve according to claim 1, characterized in that A second sealing groove is provided on the outer periphery of the end portion of the fixed iron core exposed to the valve body; It also includes a second sealing ring, which is sleeved in the second sealing groove. The end of the valve body close to the fixed iron core can be connected to a normally closed valve, and the outer ring of the second sealing ring is suitable for sealing with the normally closed valve.

18. The solenoid valve according to claim 1, characterized in that It also includes a third sealing ring, which is sleeved on the outside of the air inlet part. The outer ring of the third sealing ring is suitable for interference fitting with the inlet of the air inlet duct of another solenoid valve to connect the air inlets of two adjacent solenoid valves.

19. A controller, characterized in that: It comprises a housing, a PCB board and the solenoid valve according to any one of claims 1 to 18, wherein the coil is electrically connected to the PCB board, and the PCB board and the solenoid valve are arranged in the housing.

20. The controller according to claim 19, wherein: The solenoid valve is provided in plurality, and the plurality of solenoid valves are arranged in sequence along a preset direction, and the air intake duct has a transfer interface connected to the inlet of the air intake duct; The inlet of the air inlet of the first solenoid valve is suitable for connecting to the air source. Among the adjacent solenoid valves, the adapter of the air inlet of the previous solenoid valve is connected to the inlet of the air inlet of the next solenoid valve, and the adapter of the air inlet of the last solenoid valve is closed.

21. A seat assembly, characterized in that: It comprises a seat, an airbag and the controller according to claim 20, wherein the airbag is arranged on the seat, and the outlet of the air outlet passage of the solenoid valve is connected to the airbag to enable inflation and deflation of the airbag.

22. The seat assembly according to claim 21, wherein: The solenoid valve is provided in plurality, and the plurality of solenoid valves are arranged in sequence along a preset direction, and the air intake duct has a transfer interface connected to the inlet of the air intake duct; The inlet of the air inlet of the first solenoid valve is suitable for connecting to an air source. In adjacent solenoid valves, the adapter of the air inlet of the previous solenoid valve is connected to the inlet of the air inlet of the next solenoid valve, and the adapter of the air inlet of the last solenoid valve is closed. There are multiple airbags, and the outlet of the air outlet of each solenoid valve is connected to the corresponding airbag; At least part of the airbag is arranged on the seat cushion of the seat.

23. An automobile, characterized in that: Including the seat assembly described in claim 21 or 22.

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