Magnetic enhanced electromagnetic valve and pneumatic comfort system

Abstract

The utility model relates to a magnetism enhanced electromagnetic valve and a pneumatic comfort system, the magnetism enhanced electromagnetic valve comprises a valve body and a valve core unit arranged in a valve cavity of the valve body, and the valve body is provided with a first air passage, a second air passage and a third air passage which are communicated with the valve cavity; a coil surrounds the outer wall of the valve body; the valve element unit comprises a ferromagnetic connecting piece and a first permanent magnet and a second permanent magnet which are arranged at the two ends of the ferromagnetic connecting piece correspondingly. The coil has a magnetic pole interface; when the valve element unit moves in the valve cavity, the first permanent magnet and the second permanent magnet are located on the two sides of the magnetic pole interface all the time respectively. According to the magnetism-enhanced electromagnetic valve, the coil drives the valve element unit to move in the valve cavity so as to regulate and control connection and disconnection of the second air channel, the first air channel and the third air channel, and in the moving process of the valve element unit, the first permanent magnet and the second permanent magnet of the valve element unit are located on the two sides of a magnetic pole interface all the time respectively. The valve element unit keeps constant force in the left-right moving process, and stable regulation and control are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a magnetically enhanced electromagnetic valve and a pneumatic comfort system. Background Art

[0002] Pneumatic comfort systems, including pneumatic lumbar support systems, pneumatic massage systems, etc., inflate the lumbar support air bags, massage air bags, etc. arranged on the supporting equipment through the air supply unit, so that the corresponding air bags are inflated to achieve the effect of pneumatic support and massage. For example, in the seat pneumatic massage system, the massage air bags are arranged on the backrest or seat of the seat, and the massage air bags are inflated and deflated through the air supply unit to provide massage for the seated person.

[0003] The inflation and deflation of the air bags in the pneumatic comfort system are generally controlled by solenoid valves to control the on-off of each air path. That is, the air supply unit is connected to the air bag through a solenoid valve, so that the on-off of the inflation air path and the deflation air path is controlled by the solenoid valve, thereby realizing the inflation and deflation control of the air bag.

[0004] The existing solenoid valve has a movable iron core in the valve body. The movable iron core generates magnetism when the coil is energized, and moves to a position close to the air inlet or outlet under the action of the magnetic field to block the air inlet or outlet; when the coil is de-energized, the movable iron core is reset under the action of the spring. However, the movable iron core generates a loud impact sound, has a weak magnetic effect, a slow response speed, and a weak sealing force, which is not conducive to reducing the size and cost of the solenoid valve.

[0005] In addition, the movable iron core is affected by the magnetic field generated by the coil, which gradually compresses and releases the spring. The force on the movable iron core is constantly changing during the compression or release of the spring, while the force of the movable iron core under the action of the electromagnetic field is constant. Therefore, the control of the movable iron core, whether it is the response speed or the intensity of the control response, is insufficient, and it is easy for one end of the air inlet or outlet to fail to be quickly sealed, or the sealing is insufficient, resulting in the air inlet or outlet supplying gas at the same time, and the gas flow cannot be accurately controlled. Summary of the invention

[0006] In order to overcome the problems in the above-mentioned prior art that the solenoid valve controls the movable iron core under the action of the electromagnetic field, such as weak magnetic effect, slow response speed, weak blocking and sealing force, and inability to accurately control the gas flow, the utility model provides a magnetically enhanced solenoid valve and a pneumatic comfort system.

[0007] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0008] According to one purpose of the utility model, a magnetically enhanced solenoid valve is provided, comprising a valve body and a valve core unit, wherein the valve core unit is arranged in a valve cavity of the valve body, and the valve body is provided with a first air channel, a second air channel and a third air channel connected to the valve cavity; the valve body is provided with a coil which drives the valve core unit to move in the valve cavity by electromagnetic action when power is turned on to regulate the on-off relationship between the second air channel and the first air channel and the third air channel; the valve core unit comprises a ferromagnetic connector, a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are respectively arranged at two ends of the ferromagnetic connector, and the first permanent magnet and the second permanent magnet have the same poles facing each other; the magnetic field generated by the coil has a magnetic pole boundary surface intersecting with the first axis of the ferromagnetic connector; when the valve core unit reciprocates along the first axis, the first permanent magnet is always located on one side of the magnetic pole boundary surface, and the second permanent magnet is always located on the other side of the magnetic pole boundary surface.

[0009] In some optional implementations, when a section is taken along a direction intersecting with the first axis direction of the ferromagnetic connector, a cross-sectional area of ​​a first end of the ferromagnetic connector connected to the first permanent magnet is larger than a cross-sectional area of ​​the first permanent magnet.

[0010] In some optional implementations, when sectioning along a direction intersecting with the first axis direction of the ferromagnetic connector, a cross-sectional area of ​​the second end of the ferromagnetic connector connected to the second permanent magnet is larger than a cross-sectional area of ​​the second permanent magnet.

[0011] In some optional implementations, the first permanent magnet is disposed on the first end of the ferromagnetic connector by magnetic attraction and / or bonding;

[0012] And / or, the second permanent magnet is arranged on the second end of the ferromagnetic connector by magnetic attraction and / or bonding.

[0013] In some optional implementations, the ferromagnetic connector includes a first end, a second end, and a connecting portion connecting the first end and the second end, and when cross-sectioned along a direction intersecting with the first axis direction of the ferromagnetic connector, the cross-sectional area of ​​the connecting portion is smaller than the cross-sectional area of ​​the first end and smaller than the cross-sectional area of ​​the second end.

[0014] In some optional implementations, the thickness of the ferromagnetic connector along the first axis is greater than 1 mm.

[0015] In some optional implementations, a winding length of the coil along the first axis direction is greater than or equal to a total length of the valve core unit along the first axis direction.

[0016] In some optional implementations, a first buffer shock absorbing unit and a second buffer shock absorbing unit are further provided corresponding to the two axial ends of the valve core unit to respectively buffer the contact between the valve core unit and the valve body when the valve core unit reciprocates and reaches the first position and the second position.

[0017] In some optional implementations, an elastic adjusting member is further included, wherein the elastic adjusting member is disposed between the valve core unit and the valve body, and when the coil is powered off, the elastic adjusting member causes the valve core unit to reset.

[0018] According to another object of the utility model, a pneumatic comfort system is provided, comprising:

[0019] A number of air bags;

[0020] Air supply unit;

[0021] And the magnetically enhanced solenoid valve described above, the air supply unit is connected to the air bag through the magnetically enhanced solenoid valve;

[0022] Wherein, the air supply unit is communicated with the first air passage of the valve body, and the air bag is communicated with the second air passage of the valve body.

[0023] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0024] The magnetically enhanced solenoid valve provided by the utility model drives a valve core unit with permanent magnets connected to both ends of the axis through a coil to move in the valve cavity of the valve body to regulate the connection and disconnection between the second air channel and the first air channel and the third air channel. During the movement of the valve core unit, the first permanent magnet and the second permanent magnet are always located on the first side and the second side of the magnetic pole interface respectively, so that the valve core unit maintains a constant force during the electromagnetic action-driven left and right movement, so as to achieve precise control of the gas flow and further achieve stable regulation.

[0025] At the same time, the valve core unit adopts a dual permanent magnet structure including a ferromagnetic connector, a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are arranged at both ends of the ferromagnetic connector with the same polarity facing each other, so that the valve core unit can generate two superimposed magnetic forces under the action of the magnetic field generated by the coil being energized, thereby improving the sealing strength and response sensitivity of the valve core unit to the first airway or the third airway.

[0026] In addition, the magnetically enhanced solenoid valve provided by the utility model realizes airway blocking by connecting permanent magnets at both ends of the valve core unit to make it magnetic and has a rapid response to the magnetic field generated by the coil. The corresponding coil winding volume and the volume of the valve core unit can be reduced accordingly, thereby reducing the size and weight of the solenoid valve and reducing the cost. There is no need to set a yoke iron, which reduces the electromagnetic working power consumption, and the air resistance flowing in the valve cavity is small, making the gas flow smoother.

[0027] The pneumatic comfort system of the utility model adopts the above-mentioned solenoid valve to connect the air supply unit and the air bag to control the inflation, deflation or pressure maintenance of the air bag. The adopted solenoid valve can achieve precise control of the gas flow, thereby achieving stable pressure regulation of the air bag, making the pneumatic comfort system more comfortable.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical solution of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are only used to illustrate the embodiments and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0030] Figure 1 A schematic diagram of the structure of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0031] Figure 2 The embodiment of the utility model provides Figure 1 A cross-sectional view of the AA plane of a magnetically enhanced solenoid valve shown;

[0032] Figure 3 An exploded diagram of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0033] Figure 4 An exploded diagram of a valve core unit of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the assembly of a second buffer and shock absorbing unit, an elastic adjusting member, a sealing ring, a silencer and an air release pressure fastener of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0035] Figure 6 An exploded view of a second buffer shock absorbing unit, an elastic adjusting member, a sealing ring, a silencer and an air release pressure fastener of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0036] Figure 7 A schematic structural diagram of a degassing pressure fastener of a magnetically enhanced solenoid valve provided in an embodiment of the utility model;

[0037] Figure 8 A schematic structural diagram of a valve body of a magnetically enhanced solenoid valve provided in an embodiment of the utility model.

[0038] Among them, 1. valve body, 11. first air duct, 12. second air duct, 13. third air duct, 14. conductive component, 15. first mounting groove, 16. mounting portion, 17. mounting card slot, 18. second mounting groove, 2. valve core unit, 20. first axis, 21. ferromagnetic connector, 211. connecting portion, 212. first end, 213. second end, 22. first permanent magnet, 23. second permanent magnet, 3. coil, 31. magnetic pole boundary surface, 4. first buffer shock absorbing unit, 5. second buffer shock absorbing unit, 6. elastic adjustment member, 7. air release buckle, 71. third mounting groove, 72. fourth mounting groove, 73. block, 8. sealing ring, 9. silencer.

[0039] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present invention and should not be regarded as an improper limitation on the present invention.

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the specific technical solution of the utility model will be further described in detail below in conjunction with the drawings in the embodiment of the utility model. The following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0042] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0043] In addition, in the embodiments of the present invention, directional terms such as "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0044] In the embodiments of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0045] In the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] In order to overcome the problems in the above-mentioned prior art that the solenoid valve controls the movable iron core under the action of the electromagnetic field, such as weak magnetic effect, slow response speed, weak blocking and sealing force, and inability to accurately control the gas flow, this embodiment provides a magnetically enhanced solenoid valve.

[0048] This embodiment provides a magnetically enhanced solenoid valve, see Figure 1-3 ,in, Figure 1 A schematic diagram of the structure of a magnetically enhanced solenoid valve provided in this embodiment; Figure 2 for Figure 1 AA surface section view; Figure 3 An exploded view of a magnetically enhanced solenoid valve provided in this embodiment.

[0049] The magnetically enhanced solenoid valve comprises a valve body 1 and a valve core unit 2. The valve core unit 2 is arranged in the valve cavity of the valve body 1. The valve body 1 has a first air channel 11, a second air channel 12 and a third air channel 13 connected to the valve cavity. The outer wall of the valve body 1 is surrounded by a coil 3 which drives the valve core unit 2 to move in the valve cavity through electromagnetic action when power is turned on to adjust the on-off relationship between the second air channel 12 and the first air channel 11 and the third air channel 13. The valve core unit 2 includes a ferromagnetic connector 21, a first permanent magnet 22 and a second permanent magnet 23. The first permanent magnet 22 and the second permanent magnet 23 are respectively arranged at the two ends of the first axis 20 of the ferromagnetic connector 21, and the first permanent magnet 22 and the second permanent magnet 23 have the same poles facing each other; the magnetic field generated by the coil 3 has a magnetic pole boundary surface 31 that intersects with the first axis 20 of the ferromagnetic connector 21; when the valve core unit 2 reciprocates along the first axis 20, the first permanent magnet 22 is always located on one side of the magnetic pole boundary surface 31, and the second permanent magnet 23 is always located on the other side of the magnetic pole boundary surface 31.

[0050] In this embodiment, the second air channel 12 is used as an air charging channel, the first air channel 11 is used as an air intake channel, and the third air channel 13 is used as an air discharge channel. Therefore, the valve core unit 2 driven by the coil 3 can move in the valve cavity of the valve body 1 to adjust the on-off relationship between the air charging channel, the air intake channel, and the air discharge channel.

[0051] In this embodiment, the coil 3 is wrapped around the outer wall of the valve body 1 along the movement direction of the valve core unit 2, the valve core unit 2 is movably arranged in the valve cavity of the valve body 1, the first air channel 11 and the third air channel 13 are respectively located at the opposite ends of the valve cavity of the valve body 1, and the second air channel 12 is opened on the side wall of the valve body 1. When the coil 3 is energized, the electromagnetic action drives the valve core unit 2 to move in the valve cavity to block the first air channel 11 or the third air channel 13, thereby realizing the control of the connection and disconnection between the first air channel 11 and the second air channel 12 or between the second air channel 12 and the third air channel 13.

[0052] In this embodiment, which is a preferred embodiment, the winding length of the coil 3 along the first axis 20 is greater than or equal to the total length of the valve core unit 2 along the first axis 20; wherein, a first mounting groove 15 is provided on the outer wall of the valve body 1 along the first axis 20, and the coil 3 is arranged in the first mounting groove 15. The first permanent magnet 22 is located at the end of the valve cavity close to the first airway 11, and the second permanent magnet 23 is located at the end of the valve cavity close to the third airway 13; when the valve core unit 2 is acted upon by an external force, such as the coil 3 is driven by electromagnetic action and moves to the limit position along the first axis 20 of the ferromagnetic connector 21 toward the first airway 11, the first permanent magnet 22 moves toward the air inlet of the first airway 11 to block the air inlet, thereby blocking the first airway 11, so that the second airway 12 and the third airway 13 are connected to achieve the deflation function; when the valve core unit 2 is acted upon by an external force, such as the coil 3 is driven by electromagnetic action and moves along the first axis 20 of the ferromagnetic connector 21 toward the first airway 11, the first permanent magnet 22 moves toward the air inlet of the first airway 11 to block the air inlet, thereby blocking the first airway 11, so that the second airway 12 and the third airway 13 are connected to achieve the deflation function; When the valve core unit 20 moves to the extreme position in the direction close to the third air channel 13, the second permanent magnet 23 moves toward the air leakage port of the third air channel 13 to block the air leakage port, thereby blocking the third air channel 13, so that the first air channel 11 and the second air channel 12 are connected to achieve the inflation function; and when the valve core unit 2 reciprocates along the first axis 20, the first permanent magnet 22 is always located on the first side of the magnetic pole boundary surface 31, and the second permanent magnet 23 is always located on the second side of the magnetic pole boundary surface 31, so that the valve core unit 2 maintains a constant force during the left and right movement, thereby achieving precise control of the gas flow, so that the solenoid valve can achieve stable regulation of the gas path switching.

[0053] The valve core unit 2 adopts a dual permanent magnet structure including a ferromagnetic connector 21, a first permanent magnet 22 and a second permanent magnet 23, wherein the first permanent magnet 22 and the second permanent magnet 23 are arranged at both ends of the ferromagnetic connector 21 with the same poles facing each other. When current is passed through the coil 3, the magnetic field generated exerts an attraction force on the first permanent magnet 22 and the second permanent magnet 23, while the other is a repulsion force. However, since the first permanent magnet 22 and the second permanent magnet 23 are arranged at both ends of the ferromagnetic connector 2 with the same poles facing each other, the attraction force and the repulsion force are in the same direction, so that the valve core unit 2 can generate two superimposed magnetic forces under the action of the magnetic field generated by the coil 3 being energized, thereby improving the sealing strength and response sensitivity of the valve core unit 2 to the first airway 11 or the third airway 13.

[0054] In this embodiment, it should be noted that the first axis 20 of the ferromagnetic connector 21 is the central axis of the ferromagnetic connector 21, and the first axis 20 is also parallel to the movement direction of the valve core unit 2; the magnetic pole boundary surface 31 of the coil 3 is the boundary surface between the N pole and the S pole after the coil 3 generates a magnetic field, and the center line of the coil 3 is the projection of the magnetic field boundary surface 31 on the plane cross-sectional view.

[0055] In some optional embodiments, such as Figure 4 As shown, the material of the ferromagnetic connector 21 can be any ferromagnetic metal, including any one or more of iron, cobalt, nickel, etc., preferably iron.

[0056] In a preferred embodiment, the ferromagnetic connector 21 includes a first end 212, a second end 213, and a connecting portion 211 connecting the first end 212 and the second end 213, and the first end 212 of the ferromagnetic connector 21 is magnetically attracted and / or adhesively connected to the first permanent magnet 22, and the second end 213 of the ferromagnetic connector 21 is magnetically attracted and / or adhesively connected to the second permanent magnet 23, that is, the first permanent magnet 22 and the second permanent magnet 23 can be assembled to the ferromagnetic connector 21 by one or more methods of natural magnetic attraction and gluing.

[0057] In some optional embodiments, when a section is taken along a direction intersecting with the first axis 20 of the ferromagnetic connector 21, a cross-sectional area of ​​a first end 212 of the ferromagnetic connector 21 connected to the first permanent magnet 22 is larger than a cross-sectional area of ​​the first permanent magnet 22; and / or, when a section is taken along a direction intersecting with the first axis 20 of the ferromagnetic connector 21, a cross-sectional area of ​​a second end 213 of the ferromagnetic connector 21 connected to the second permanent magnet 23 is larger than a cross-sectional area of ​​the second permanent magnet 23.

[0058] In this embodiment, the diameter or cross-sectional area of ​​the magnetic connector 21 is set to be larger than the diameter or cross-sectional area of ​​the first permanent magnet 22 and / or the second permanent magnet 23 to ensure that the magnetic fields between the first permanent magnet 22 and the second permanent magnet 23 disposed at both ends of the ferromagnetic connector 21 do not interfere with each other.

[0059] And in a cross section along a direction intersecting the first axis 20 of the ferromagnetic connector 21, the cross-sectional area of ​​the connecting portion 211 is smaller than the cross-sectional area of ​​the first end 212 and smaller than the cross-sectional area of ​​the second end 213. That is, it can be understood that designing the ferromagnetic connector 21 as a dumbbell structure can reduce the material used for the ferromagnetic connector 21 and reduce the weight of the ferromagnetic connector 21, thereby saving costs.

[0060] In addition, the thickness of the ferromagnetic connector 21 along the first axis 20 can be infinitely thin, and the preferred embodiment is greater than 1 mm. The thickness of the ferromagnetic connector 21 along the first axis 20 is greater than 1 mm to further reduce the size and weight of the solenoid valve and reduce the cost.

[0061] In some optional embodiments, the magnetically enhanced solenoid valve further includes a first buffer shock absorbing unit 4 and a second buffer shock absorbing unit 5, and the first buffer shock absorbing unit 4 and the second buffer shock absorbing unit 5 are correspondingly arranged at the two axial ends of the valve core unit 2 to respectively buffer the contact between the valve core unit 2 and the valve body 1 when the valve core unit 2 reciprocates and reaches the first position and the second position.

[0062] In some optional embodiments, the first buffer shock absorbing unit 4 and the second buffer shock absorbing unit 5 are preferably made of silicone material; the first buffer shock absorbing unit 4 and the second buffer shock absorbing unit 5 are assembled in the valve cavity of the valve body 1, and are respectively located on both sides of the first axis 20 of the valve core unit 2. When the valve core unit 2 moves to the extreme position, it squeezes the first buffer shock absorbing unit 4 or the second buffer shock absorbing unit 5 to block the first air channel 11 or the third air channel 13.

[0063] Preferably, the first buffer shock absorbing unit 4 is installed at the air inlet of the first air duct 11, and the second buffer shock absorbing unit 5 is installed at the air discharge port of the third air duct 13. When the coil 3 drives the valve core unit 2 to move to the extreme position along the first axis 20 of the ferromagnetic connecting piece 21 toward the first air duct 11 through electromagnetic action, the first permanent magnet 22 squeezes the first buffer shock absorbing unit 4 to achieve continued blocking of the first air duct 11 while buffering the contact between the valve core unit 2 and the valve body 1; when the coil 3 drives the valve core unit 2 to move to the extreme position along the first axis 20 of the ferromagnetic connecting piece 21 toward the third air duct 13 through electromagnetic action, the second permanent magnet 23 squeezes the second buffer shock absorbing unit 5 to achieve continued blocking of the third air duct 13 while buffering the contact between the valve core unit 2 and the valve body 1.

[0064] Of course, in some other embodiments, the first buffer shock absorbing unit 4 can be connected and assembled on the end of the first permanent magnet 22 facing away from the magnetic connector 21, and the second buffer shock absorbing unit 5 can be connected and assembled on the end of the second permanent magnet 23 facing away from the magnetic connector 21, so as to achieve good blocking of the first air channel 11 or the third air channel 13 when the movement and switching of the valve core unit 2 reaches the extreme position.

[0065] Furthermore, in some optional embodiments, the reciprocating motion of the valve core unit 2 in the first axis direction can be achieved by changing the direction of the current passed into the coil 3 to change the direction of motion; or, an elastic adjustment member 6 can be provided to enable the valve core unit 2 to keep blocking the first air channel 11 or blocking the third air channel 13 when the coil 3 is not energized, and when the coil 3 is energized, the valve core unit 2 is driven to overcome the elastic force of the elastic adjustment member 6 and switch to blocking the third air channel 13 or the first air channel 11, thereby achieving air path switching.

[0066] In a specific embodiment, the magnetically enhanced solenoid valve further includes an elastic adjustment member 6 and an air release pressure fastener 7. The elastic adjustment member 6 may be selected from but not limited to a spring. In the specific embodiment shown, the elastic adjustment member 6 is selected as a spring, one end of which is against the valve core unit 2, and the other end of the elastic adjustment member 6 passes through the second buffer shock absorbing unit 5 and is against the valve body 1; the air release pressure fastener 7 is assembled at the end of the third air passage 13 of the valve body 1 and is connected to the third air passage 13, and a sealing ring 8 is provided at the connection between the air release pressure fastener 7 and the valve body 1, and a silencer 9 for reducing air release noise is provided on the air release pressure fastener 7.

[0067] Specifically, Figure 5-8 As shown, a second mounting groove 18 connected to the third air channel 13 is provided at the end where the third air channel 13 of the valve body 1 is located, and the second mounting groove 18 allows the air-release pressure fastener 7 to be embedded and assembled, and the air-release pressure fastener 7 is embedded in the second mounting groove 18 and sealed with the valve body 1 through the sealing ring 8; at the same time, a mounting groove 17 is provided on the outer wall of the end where the third air channel 13 of the valve body 1 is located, and a block 73 that can be snapped into the mounting groove 17 is provided on the outer wall of the air-release pressure fastener 7. After the air-release pressure fastener 7 is embedded and installed in the second mounting groove 18, the block 73 of the air-release pressure fastener 7 is snapped into the mounting groove 17 to achieve fixed assembly with the valve body 1.

[0068] In addition, a third mounting groove 71 is provided at the end of the air-delivery pressure fastener 7 embedded in the valve body 1, and the second buffer shock-absorbing unit 5 can be embedded and installed in the third mounting groove 71, and one end of the elastic adjustment member 6 is against the valve core unit 2, and the other end of the elastic adjustment member 6 passes through the second buffer shock-absorbing unit 5 and is against the air-delivery pressure fastener 7.

[0069] Therefore, when the coil 3 is not powered, the valve core unit 2 keeps squeezing and driving the first airway 11 along the first axis 20 of the ferromagnetic connector 21 under the elastic force of the elastic adjusting member 6, and the first permanent magnet 22 squeezes the first buffer shock absorbing unit 4 to achieve the blocking of the first airway 11, forming the normally closed state of air intake. When the coil 3 is powered, the valve core unit 2 is driven by electromagnetic action to move to the extreme position along the first axis 20 of the ferromagnetic connector 21 toward the third airway 13, and the second permanent magnet 23 overcomes the elastic force of the elastic adjusting member 6 and squeezes the second buffer shock absorbing unit 5 to achieve the blocking of the third airway 13; and when the coil 3 is powered off, the valve core unit 2 moves and resets toward the first airway 11 under the elastic force of the elastic adjusting member 6, and keeps the blocking of the first airway 11.

[0070] In some optional embodiments, a silencer 9 for reducing the deflation noise is provided on the deflation pressure fastener 7. Specifically, a fourth mounting groove 72 is provided at the deflation end of the deflation pressure fastener 7, and the silencer 9 is inserted and installed in the fourth mounting groove 72 to eliminate the air flow sound passing through the third air duct 13.

[0071] In addition, in some optional embodiments, the magnetically enhanced solenoid valve further includes a conductive component 14, which can be a conductive pin. At the same time, a mounting portion 16 for fixing the conductive component 14 is provided on the valve body 1. The conductive component 14 is fixedly mounted on the mounting portion 16 and connected to the coil 3 so that the coil 3 can be powered on and off through the conductive component 14.

[0072] In some optional embodiments, the embodiments of the utility model also provide a pneumatic comfort system, which may be a pneumatic massage system, a pneumatic lumbar support system or a pneumatic wing support system. The pneumatic comfort system includes: a plurality of air bags, an air supply unit and the magnetically enhanced solenoid valve described above, and the air supply unit is connected to the air bag through the magnetically enhanced solenoid valve.

[0073] Specifically, the air supply unit is communicated with the first air passage 11 of the valve body 1 , and the air bag is communicated with the second air passage 12 of the valve body 1 .

[0074] When the pneumatic comfort system is inflated and deflated, the second air passage 12 is an inflation channel connected to the air bag, the first air passage 11 is an air intake channel connected to the air supply unit, and the third air passage 13 is an air release channel. When the coil 3 is energized and drives the valve core unit 2 to block the third air passage 13, the second air passage 12 is opened and communicated with the first air passage 11, the third air passage 13 is blocked to maintain pressure, and the air supply unit inflates the air bag; when the valve core unit 2 is driven by the electromagnetic action of the energized coil 3 or the elastic adjustment member 6 to block the first air passage 11, the second air passage 12 is connected to the opened third air passage 13, and the air bag is deflated through the second air passage 12 and the third air passage 13.

[0075] In a preferred embodiment, the air supply unit includes an air pump or an air storage device, such as an air storage tank. In other preferred embodiments, the solenoid valve and the air supply unit can also be a pump-valve integrated structure integrating an air valve and an air pump.

[0076] The pneumatic comfort system provided by the embodiment of the utility model adopts the solenoid valve described above to connect the air supply unit and the air bag to control the inflation, deflation or pressure maintenance of the air bag. The solenoid valve adopted can achieve precise control of the gas flow rate, thereby achieving stable pressure regulation of the air bag, making the pneumatic comfort system more comfortable.

[0077] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, which are only examples for clearly illustrating the present utility model, and do not limit the patent scope of the present application. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description, and it is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of protection of the claims of the present utility model.

Claims

1. A magnetically enhanced solenoid valve, characterized in that: The invention comprises a valve body (1) and a valve core unit (2), wherein the valve core unit (2) is arranged in a valve cavity of the valve body (1), and the valve body (1) is provided with a first air channel (11), a second air channel (12) and a third air channel (13) which are connected to the valve cavity; the valve body (1) is provided with a coil (3) which, when powered on, drives the valve core unit (2) to move in the valve cavity through electromagnetic action to adjust the on-off relationship between the second air channel (12) and the first air channel (11) and the third air channel (13); the valve core unit (2) comprises a ferromagnetic connector (21), a first permanent magnet (22) and a second permanent magnet (23) The first permanent magnet (22) and the second permanent magnet (23) are respectively arranged at two ends of the ferromagnetic connector (21), and the first permanent magnet (22) and the second permanent magnet (23) have the same poles facing each other; the magnetic field generated by the coil (3) has a magnetic pole boundary surface (31) intersecting with the first axis (20) of the ferromagnetic connector (21); when the valve core unit (2) reciprocates along the first axis (20), the first permanent magnet (22) is always located on one side of the magnetic pole boundary surface (31), and the second permanent magnet (23) is always located on the other side of the magnetic pole boundary surface (31).

2. The magnetically enhanced solenoid valve according to claim 1, characterized in that: Taking a cross section along a direction intersecting the first axis (20) direction of the ferromagnetic connector (21), the cross-sectional area of ​​the first end (212) of the ferromagnetic connector (21) connected to the first permanent magnet (22) is greater than the cross-sectional area of ​​the first permanent magnet (22).

3. The magnetically enhanced solenoid valve according to claim 1, characterized in that: Taking a cross section along a direction intersecting the first axis (20) of the ferromagnetic connector (21), the cross-sectional area of ​​the second end (213) of the ferromagnetic connector (21) connected to the second permanent magnet (23) is greater than the cross-sectional area of ​​the second permanent magnet (23).

4. The magnetically enhanced solenoid valve according to claim 1, characterized in that: The first permanent magnet (22) is arranged on the first end (212) of the ferromagnetic connector (21) by magnetic attraction and / or bonding; And / or, the second permanent magnet (23) is arranged on the second end (213) of the ferromagnetic connector (21) by magnetic attraction and / or bonding.

5. The magnetically enhanced solenoid valve according to claim 1, characterized in that: The ferromagnetic connector (21) comprises a first end (212), a second end (213) and a connecting portion (211) connecting the first end (212) and the second end (213), and when a cross section is taken along a direction intersecting with a first axis (20) of the ferromagnetic connector (21), a cross-sectional area of ​​the connecting portion (211) is smaller than a cross-sectional area of ​​the first end (212) and smaller than a cross-sectional area of ​​the second end (213).

6. The magnetically enhanced solenoid valve according to claim 1, characterized in that: The thickness of the ferromagnetic connecting member (21) along the first axis (20) is greater than 1 mm.

7. The magnetically enhanced solenoid valve according to claim 1, characterized in that: The winding length of the coil (3) along the first axis (20) is greater than or equal to the total length of the valve core unit (2) along the first axis (20).

8. The magnetically enhanced solenoid valve according to claim 1, characterized in that: It also comprises a first buffer shock absorbing unit (4) and a second buffer shock absorbing unit (5) which are arranged corresponding to the two axial ends of the valve core unit (2) so as to respectively buffer the contact between the valve core unit (2) and the valve body (1) when the valve core unit (2) reciprocates and reaches the first position and the second position.

9. The magnetically enhanced solenoid valve according to any one of claims 1 to 8, characterized in that: It also comprises an elastic adjusting member (6), which is arranged between the valve core unit (2) and the valve body (1), and when the coil (3) is powered off, the elastic adjusting member (6) causes the valve core unit (2) to reset.

10. A pneumatic comfort system, characterized in that: include: A number of air bags; Air supply unit; and the magnetically enhanced solenoid valve according to any one of claims 1 to 9, wherein the air supply unit is connected to the air bag through the magnetically enhanced solenoid valve; The air supply unit is in communication with a first air passage (11) of the valve body (1), and the air bag is in communication with a second air passage (12) of the valve body (1).

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