Electromagnetic valve and pneumatic comfort system

Abstract

The utility model relates to an electromagnetic valve and a pneumatic comfort system. The electromagnetic valve comprises a valve body, a coil, a first valve element and a second valve element. The valve body is provided with a conduction chamber, and a first medium opening, a second medium opening and a third medium opening which are communicated with the conduction chamber; the coil is wound on the valve body; the first valve element comprises a first permanent magnet, and the first valve element can move to close or open the first medium opening under the excitation effect of the coil. The second valve element comprises a second permanent magnet which is homopolar and opposite to the first permanent magnet, and the second valve element can move to close or open the second medium opening under the excitation action of the coil. The electromagnetic valve is provided with the single coil, according to the power-on state of the coil, the first valve element is controlled to move to open or close the first medium opening, the second valve element is controlled to move to open or close the second medium opening, and the conduction relation among the first medium opening, the second medium opening and the third medium opening is controlled. And the functions of inflating, deflating and pressure maintaining can be realized.

Description

Technical Field

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

[0002] Current two-position, three-way solenoid valves only function to inflate and deflate, but not to maintain pressure. While suitable for pneumatic massage systems requiring only inflation and deflation, they have significant limitations in pneumatic comfort systems that require pressure maintenance, such as pneumatic lumbar support systems. Pneumatic lumbar support systems primarily rely on three-position, three-way solenoid valves to inflate, deflate, and maintain pressure in the lumbar support bag, adjusting the support function and providing the user with a comfortable lumbar support experience.

[0003] The three-position, three-way solenoid valve has two valve sections, each with a valve core and a coil wound around it. The two sections are interconnected to form a complete gas control channel system.

[0004] The inflation process of the three-position three-way solenoid valve is as follows: an air inlet and an inflation port are provided on one section of the valve body. When the valve core in the valve body of this section moves and opens the air inlet, the valve core of the other section of the valve body is controlled to close the air discharge port at the same time, so that the gas can flow into the inflation port through the air inlet and then be delivered to the gas-using unit (such as a waist support air bag), thereby realizing the inflation function.

[0005] The pressure maintaining process of the three-position three-way solenoid valve is as follows: when the valve core of one section of the valve body closes the air inlet and the valve core of the other section of the valve body also closes the air discharge port, the gas in the air unit cannot flow out, so that the gas in the waist support air bag remains stable, thus realizing the pressure maintaining function.

[0006] The deflation process of the three-position three-way solenoid valve is as follows: when the valve core of one section of the valve body closes the air inlet, the valve core of the other section of the valve body is controlled to open the deflation port. At this time, the gas in the air-using unit (such as a waist support air bag) can flow out to the atmospheric environment through the inflation port and the deflation port in turn, completing the deflation operation.

[0007] Therefore, to achieve the three functions of the lumbar support airbag—inflation, deflation, and pressure maintenance—it's necessary to separately control the excitation of the two coils, driving the two valve cores to perform the corresponding actions. This means that the control program must precisely coordinate the excitation timing, intensity, and other parameters of the two coils to ensure that the two valve cores can accurately operate according to the different requirements of inflation, deflation, and pressure maintenance. For example, during inflation, it's necessary to ensure that the valve core of one valve section accurately opens the air inlet while the valve core of the other section accurately closes the air outlet. This multi-component coordination and the need for precise control make the control program extremely complex.

[0008] In addition, the use of two sets of coils and two valve bodies results in a corresponding increase in hardware costs. On the one hand, the procurement and manufacturing costs of the coils themselves are cumulative, and the two sets of coils consume more energy during operation. On the other hand, ensuring the accurate movement of the two valve cores may require more sophisticated processing techniques and higher-quality materials, which further increases the manufacturing cost of the valve body and the entire solenoid valve. Furthermore, the structural design of two sets of coils and two valve bodies results in a bulky, three-way, three-position solenoid valve. Furthermore, complex control programs consume more manpower and material resources during development and debugging, indirectly increasing costs. Utility Model Content

[0009] In order to overcome the limitations of the above-mentioned prior art on the application of two-position three-way solenoid valves in pneumatic comfort systems including pneumatic lumbar support systems, and the problems of three-position three-way solenoid valves in complex structure, complex working control procedures, and high cost, the present utility model provides a solenoid valve and a pneumatic comfort system.

[0010] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0011] According to one purpose of the present invention, a solenoid valve is provided, comprising:

[0012] The valve body is provided with a conduction chamber and a first medium opening, a second medium opening, and a third medium opening communicating with the conduction chamber;

[0013] a coil, wound around the valve body;

[0014] a first valve core disposed in the conduction chamber, the first valve core comprising a first permanent magnet; the first valve core being capable of displacing to close or open the first medium opening under the excitation of the coil; and

[0015] a second valve core disposed in the conduction chamber, the second valve core comprising a second permanent magnet, wherein the second permanent magnet and the first permanent magnet have the same polarity facing each other; the second valve core can be displaced to close or open the second medium opening under the excitation of the coil;

[0016] The solenoid valve has a first conduction state in which the coil is placed in a first energized state, so that the first valve core is displaced to open the first medium opening and the second valve core is displaced to close the second medium opening, so that the first medium opening and the third medium opening are connected; and a second conduction state in which the coil is placed in a second energized state, so that the first valve core is displaced to close the first medium opening and the second valve core is displaced to open the second medium opening, so that the second medium opening and the third medium opening are connected; and a third conduction state in which the coil is placed in a third energized state, so that the first valve core is displaced to close the first medium opening and the second valve core is displaced to close the second medium opening, so that the first medium opening, the second medium opening and the third medium opening are cut off from connection.

[0017] In some optional implementations, a first reset element is further included; the first reset element is disposed in the conduction chamber and elastically drives the first valve core to close or open the first medium opening.

[0018] In some optional implementations, a second reset element is further included; the second reset element is disposed in the conduction chamber and elastically drives the second valve core to close or open the second medium opening.

[0019] In some optional implementations, it further includes a first reset element, a second reset element and a bracket; the bracket is arranged in the conduction chamber and is located between the first valve core and the second valve core; the first end of the first reset element is operatively connected to the bracket, and the second end is operatively connected to the first valve core, and the first reset element elastically drives the first valve core to close the first medium opening; the second end of the second reset element is operatively connected to the bracket, and the first end is operatively connected to the second valve core, and the second reset element elastically drives the second valve core to close the second medium opening.

[0020] In some optional implementations, a first positioning groove corresponding to the first end of the first resetting element is provided on the bracket, and the first end of the first resetting element is positioned in the first positioning groove.

[0021] In some optional implementations, a second positioning groove corresponding to the second end of the second resetting element is provided on the bracket, and the second end of the second resetting element is positioned in the second positioning groove.

[0022] In some optional implementations, the bracket is movably disposed in the conduction chamber, and the first resetting element and the second resetting element have the same elastic coefficient.

[0023] In some optional implementations, the bracket is limitedly disposed in the conduction chamber, and the elastic coefficient of the first reset element is greater than the elastic coefficient of the second reset element.

[0024] In some optional implementations, a reset element is further included; the reset element is arranged in the conduction chamber, and the reset element elastically drives the first valve core to close the first medium opening, and elastically drives the second valve core to close the second medium opening.

[0025] According to another object of the present invention, a pneumatic comfort system is provided, comprising:

[0026] Several air bags;

[0027] Air supply unit;

[0028] and the solenoid valve described in any one of the above items, wherein the air supply unit is connected to the air bag via the solenoid valve;

[0029] The air supply unit is in fluid communication with the first medium opening or the second medium opening of the valve body, and the air bag is in fluid communication with the third medium opening of the valve body.

[0030] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0031] The solenoid valve provided by the present invention comprises a single coil and a first valve core and a second valve core controlled by coil excitation. Depending on the energized state of the coil, the excitation controls the displacement of the first valve core to open the first medium opening and simultaneously causes the second valve core to displace and close the second medium opening, thereby connecting the first medium opening to the third medium opening; or the excitation controls the displacement of the second valve core to open the second medium opening and simultaneously causes the first valve core to displace and close the first medium opening, thereby connecting the second medium opening to the third medium opening; or the excitation controls the displacement of the first valve core to close the first medium opening and causes the second valve core to displace and close the second medium opening, thereby preventing the first medium opening, the second medium opening, and the third medium opening from connecting. This achieves precise control over the on-off relationship between the first, second, and third medium openings. Compared to conventional two-position, three-way solenoid valves, this valve core can achieve inflation, deflation, and pressure-maintaining functions. Compared to conventional three-position, three-way solenoid valves, this valve core can achieve stable control over inflation, deflation, and pressure-maintaining functions while reducing the number of coils and valve bodies required, thereby reducing costs and the overall space occupied by the valve structure, and extending its applicability.

[0032] The pneumatic comfort system provided by 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 solenoid valve adopted can achieve precise control of the gas flow, thereby achieving stable pressure regulation of the air bag, so that the pneumatic comfort system has better functional regulation effect.

[0033] 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 in accordance with 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

[0034] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a solenoid valve provided by an embodiment of the present utility model along a first viewing angle;

[0036] Figure 2 A schematic diagram of the three-dimensional structure of a solenoid valve provided by an embodiment of the present utility model along a second viewing angle;

[0037] Figure 3 A top view of a solenoid valve provided in an embodiment of the present utility model;

[0038] Figure 4 For the Figure 3 The cross-sectional view of the AA surface;

[0039] Figure 5 A schematic structural diagram of a pneumatic comfort system provided by an embodiment of the present utility model;

[0040] in,

[0041] 10. Valve body;

[0042] 101, conduction chamber; 102, first medium opening; 103, second medium opening; 104, third medium opening; 105, card slot;

[0043] 110, pin;

[0044] 20. Coil;

[0045] 30. First valve core; 301. First sealing member;

[0046] 40. Second valve core; 401. Second sealing member;

[0047] 50. A first reset element;

[0048] 60. Second reset element;

[0049] 70. Bracket;

[0050] 80. Air intake nozzle; 801. Air intake channel;

[0051] 810, third seal;

[0052] 90. Inflating nozzle; 901. Inflating channel;

[0053] 100. Airbag;

[0054] 200. Air supply unit.

[0055] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0056] 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.

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific technical solutions of the present invention will be further described in detail below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "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, "plurality" means two or more.

[0059] 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 changes in the orientation of the components in the drawings.

[0060] 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 integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0061] In the embodiments of the present invention, the terms "comprise", "include" or any other variations thereof are intended to cover non-exclusive inclusion. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0062] 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 construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0063] The embodiment of the utility model provides a solenoid valve to overcome the problems of the three-position three-way solenoid valve in the prior art, such as complex structure, complex working control procedure, high cost, etc.

[0064] The present invention provides a solenoid valve, such as Figure 1-4 As shown, it includes: a valve body 10, a coil 20, a first valve core 30 and a second valve core 40.

[0065] The valve body 10 is provided with a conducting chamber 101 and a first medium opening 102 , a second medium opening 103 and a third medium opening 104 communicating with the conducting chamber 101 .

[0066] The coil 20 is wound around the valve body 10 .

[0067] The first valve core 30 is disposed in the conduction chamber 101 and includes a first permanent magnet. The first valve core 30 can be displaced to close or open the first medium opening 102 under the excitation of the coil 20 .

[0068] The second valve core 40 is disposed in the conduction chamber 101 and includes a second permanent magnet, and the second permanent magnet and the first permanent magnet have the same pole facing each other. The second valve core 40 can be displaced to close or open the second medium opening 103 under the excitation of the coil 20 .

[0069] The solenoid valve has a first conduction state in which the coil 20 is placed in a first energized state, so that the first valve core 30 is displaced to open the first medium opening 102 and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102 and the third medium opening 104 are connected; and a second conduction state in which the coil 20 is placed in a second energized state, so that the first valve core 30 is displaced to close the first medium opening 102 and the second valve core 40 is displaced to open the second medium opening 103, so that the second medium opening 103 and the third medium opening 104 are connected; and a third conduction state in which the coil 20 is placed in a third energized state, so that the first valve core 30 is displaced to close the first medium opening 102 and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102, the second medium opening 103 and the third medium opening 104 are stopped from being connected.

[0070] This embodiment can be understood as follows: when the solenoid valve puts the coil 20 in the first energized state, the coil 20 generates a magnetic field, which causes the first valve core 30 to move and open the first medium opening 102 through the excitation effect, and at the same time, the excitation effect causes the second valve core 40 to move and close the second medium opening 103, so that the first medium opening 102 and the third medium opening 104 are connected. At this time, the solenoid valve can be in an inflated state; when the solenoid valve puts the coil 20 in the second energized state, the coil 20 generates a magnetic field, which causes the first valve core 30 to move and close the first medium opening 103 through the excitation effect. The electromagnetic valve is in a deflated state; when the coil 20 is in a third energized state, the first valve core 30 is displaced to close the first medium opening 102, and at the same time, the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102, the second medium opening 103 and the third medium opening 104 are cut off from each other. At this time, the electromagnetic valve is in a pressure-maintaining state.

[0071] Among them, the coil 20 is in the first energized state, which means that the coil 20 is in a forward current state; the coil 20 is in the second energized state, which means that the coil 20 is in a reverse current state; the coil 20 is in the third energized state, which means that the coil 20 is in an unenergized state, or the coil 20 is in a power-off state.

[0072] In this preferred embodiment, the coil 20 is wound around the outer wall of the valve body 10. The coil 20 and the first and second valve cores 30, 40 can be arranged concentrically or parallel to each other. The winding area of ​​the coil 20 on the valve body 10 corresponds to the conduction chamber 101 of the valve body 10. Furthermore, along the axial direction of the first and second valve cores 30, 40, the first and second valve cores 30, 40 are located on either side of a midline of the coil 20 that is perpendicular to the axial direction of the coil 20. The first and second valve cores 30, 40 are movably disposed within the conduction chamber 101 of the valve body 10, with a certain gap between the first and second valve cores 30, 40 and the inner wall of the conduction chamber 101 of the valve body 10. A first and second medium openings 102, 103 are located at opposite ends of the conduction chamber 101 of the valve body 10, serving as an air inlet and an air outlet, respectively. A third medium opening 104 is provided on the side wall of the valve body 10, serving as an air inlet. During inflation, gas entering through the first medium opening 102 passes through the gaps between the first valve core 30 and the inner wall of the communication chamber 101, and between the second valve core 40 and the inner wall of the communication chamber 101, and enters the third medium opening 104. During deflation, gas in the third medium opening 104 is discharged through the communication chamber 101 and out of the second medium opening 103. During pressure maintenance, the first valve core 30 and the second valve core 40 respectively close the first medium opening 102 and the second medium opening 103. Under different energized states, the coil 20 is energized to cause the first valve core 30 and the second valve core 40 to displace, thereby controlling the flow between the first and third medium openings 102 and 104, and between the second and third medium openings 103 and 104.

[0073] In addition, as a preferred embodiment, a wire groove is provided on the outer wall of the valve body 10. The wire groove is arranged around the outer wall of the valve body 10, and the coil 20 is wound in the wire groove. Among them, pins 110 are connected to both ends of the coil 20 for connecting to a power source through the pins 110.

[0074] As an optional embodiment of the present invention, the first valve core 30 can be entirely formed as a permanent magnet, i.e., the entire valve core is a first permanent magnet, or partially formed as a permanent magnet, i.e., including the first permanent magnet. When the first valve core 30 partially forms a permanent magnet, the first permanent magnet is disposed as a local component on the first valve core 30. Correspondingly, the second valve core 40 can be entirely formed as a permanent magnet, i.e., the entire valve core is a second permanent magnet, or partially formed as a permanent magnet, i.e., including the second permanent magnet. When the second valve core 40 partially forms a permanent magnet, the second permanent magnet is disposed as a local component on the second valve core 40. The first valve core 30 is configured to include a first permanent magnet, and the second valve core 40 is configured to include a second permanent magnet, and the first permanent magnet and the second permanent magnet have the same poles facing each other, so that when the coil 20 is subjected to current, the first valve core 30 and the second valve core 40 will be excited and move in the same direction, so that the first medium opening 102 and the second medium opening 103 have different opening and closing states. For example, when the coil 20 is subjected to a forward current, the first valve core 30 and the second valve core 40 are excited and move toward the direction close to the second medium opening 103, and the first valve core 30 opens the first medium opening 102 and the second valve core 40 closes the second medium opening 103; or when the coil 20 is subjected to a reverse current, the first valve core 30 and the second valve core 40 are excited and move toward the direction close to the first medium opening 102, and the first valve core 30 closes the first medium opening 102 and the second valve core 40 opens the second medium opening 103.

[0075] The solenoid valve provided by the embodiment of the present invention is provided with a single coil 20, and according to the power-on state of the coil 20, the first valve core 30 is magnetically controlled to displace and open the first medium opening 102, and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102 and the third medium opening 104 are connected; or the second valve core 40 is magnetically controlled to displace and open the second medium opening 103, and the first valve core 30 is displaced to close the first medium opening 102, so that the second medium opening 103 and the third medium opening 104 are connected; or the first valve core 30 is magnetically controlled to displace and close the first medium opening 102 and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102, the second medium opening 103 and the third medium opening 104 are cut off from connection. It can realize precise control of the on-off relationship among the first medium opening 102, the second medium opening 103 and the third medium opening 104. Compared with the traditional two-position three-way solenoid valve, it can realize the functions of inflation, deflation and pressure maintenance. Compared with the traditional three-position three-way solenoid valve, it can realize stable regulation of inflation, deflation and pressure maintenance while reducing the setting of coils and valve bodies, reducing costs and reducing the space occupancy rate of the overall valve structure. It has a wider range of applications and is applicable to pneumatic massage systems, pneumatic lumbar support systems, etc.

[0076] When the coil 20 is in the third energized state (de-energized state), the first valve core 30 closes the first medium opening 102 and the second valve core 40 closes the second medium opening 103. Specifically, this can be achieved through the repulsion of the same poles of the first permanent magnet of the first valve core 30 and the second permanent magnet of the second valve core 40. Under the action of the magnetic repulsion force, the first valve core 30 moves away from the second valve core 40 to close the first medium opening 102, and under the action of the magnetic repulsion force, the second valve core 40 moves away from the first valve core 30 to close the second medium opening 103. Alternatively, when the coil 20 is in the third energized state (de-energized state), the first valve core 30 closing the first medium opening 102 and the second valve core 40 closing the second medium opening 103 can be achieved through the action of a reset element.

[0077] In some optional embodiments, the solenoid valve further includes: a first reset element 50 ; the first reset element 50 is disposed in the conduction chamber 101 and elastically drives the first valve core 30 to close or open the first medium opening 102 .

[0078] In this embodiment, the first reset element 50 may be, but is not limited to, a spring. Since the first valve core 30 can be displaced to close or open the first medium opening 102 under the excitation of the coil 20 , the first reset element 50 can elastically drive the first valve core 30 to close or open the first medium opening 102 .

[0079] Based on the function of the first reset element 50, the setting position of the first reset element 50 includes two situations:

[0080] First, the first reset element 50 can be disposed between the first valve core 30 and the second valve core 40. Under normal conditions (no current flowing through the coil 20), the first valve core 30 is elastically driven to close the first medium opening 102. In this case, a first stopper can be disposed between the first valve core 30 and the second valve core 40, so that both ends of the first reset element 50 abut against the first valve core 30 and the first stopper, respectively.

[0081] In this embodiment, the first stopper may be a movable member or a fixed member, and is disposed in the conduction chamber 101 and between the first valve core 30 and the second valve core 40 .

[0082] When the first retaining member is set as a movable member, its specific structure can refer to the bracket 70 described later; the first retaining member can be displaced in the conduction chamber 101 under the compulsion of the first valve core 30 and / or the second valve core 40 according to different power-on states of the coil 20.

[0083] When the first stop member is set as a fixed member, its specific structure can be a limit platform protruding from the inner wall of the conduction chamber 101 in the axial direction of the conduction chamber 101, and the two ends of the first reset element 50 are respectively in contact with the first valve core 30 and the limit platform.

[0084] Alternatively, the first reset element 50 can be disposed between the first valve core 30 and the inner wall of the valve body 10, where the first medium opening 102 is formed. In a normal state (when no current is flowing through the coil 20), the first valve core 30 is elastically driven to open the first medium opening 102. In this state, the ends of the first reset element 50 respectively abut against the first valve core 30 and the inner wall of the valve body 10, where the first medium opening 102 is formed.

[0085] In some optional embodiments, the solenoid valve further includes: a second reset element 60 ; the second reset element 60 is disposed in the conduction chamber 101 and elastically drives the second valve core 40 to close or open the second medium opening 103 .

[0086] In this embodiment, the second reset element 60 may be, but is not limited to, a spring. Since the second valve core 40 can be displaced to close or open the second medium opening 103 under the excitation of the coil 20 , the second reset element 60 can elastically drive the second valve core 40 to close or open the second medium opening 103 .

[0087] Based on the function of the second reset element 60, the setting position of the second reset element 60 includes two situations:

[0088] First, the second reset element 60 can be disposed between the first valve core 30 and the second valve core 40. In a normal state (when no current is flowing through the coil 20), the second valve core 40 is elastically driven to close the second medium opening 103. In this case, a second stopper can be disposed between the first valve core 30 and the second valve core 40 so that both ends of the second reset element 60 abut against the second valve core 40 and the second stopper, respectively.

[0089] In this embodiment, the second stopper may be a movable member or a fixed member, which is disposed in the conduction chamber 101 and between the first valve core 30 and the second valve core 40 .

[0090] When the second retaining member is set as a movable member, its specific structure can refer to the bracket 70 described later; the second retaining member can be displaced in the conduction chamber 101 under the compulsion of the first valve core 30 and / or the second valve core 40 according to the different power-on states of the coil 20.

[0091] When the second stop member is set as a fixed member, its specific structure can be a limit platform protruding from the inner wall of the conduction chamber 101 in the axial direction of the conduction chamber 101, and the two ends of the second reset element 60 are respectively in contact with the second valve core 40 and the limit platform.

[0092] Alternatively, the second reset element 60 can be disposed between the second valve core 40 and the inner wall of the valve body 10, where the second medium opening 103 is formed. In a normal state (when no current is flowing through the coil 20), the second valve core 40 is elastically driven to open the second medium opening 103. In this state, the ends of the second reset element 60 respectively abut against the second valve core 40 and the inner wall of the valve body 10, where the second medium opening 103 is formed.

[0093] As a preferred embodiment, when the first retaining member and the second retaining member are configured as movable members, the first retaining member and the second retaining member may share the same bracket 70 .

[0094] In some optional embodiments, the solenoid valve further includes: a first reset element 50, a second reset element 60, and a bracket 70. The bracket 70 is disposed in the conduction chamber 101 and is located between the first valve core 30 and the second valve core 40. The first end of the first reset element 50 is operatively connected to the bracket 70, and the second end is operatively connected to the first valve core 30. The first reset element 50 elastically drives the first valve core 30 to close the first medium opening 102. The second end of the second reset element 60 is operatively connected to the bracket 70, and the first end is operatively connected to the second valve core 40. The second reset element 60 elastically drives the second valve core 40 to close the second medium opening 103.

[0095] Among them, the bracket 70 can be selected as a bracket of any material, such as a magnetic material or a non-magnetic material, preferably a non-magnetic bracket, such as a plastic bracket, which can reduce the interference of the magnetic repulsion between the first permanent magnet of the first valve core 30 and the second permanent magnet of the second valve core 40.

[0096] This embodiment is a preferred embodiment. The first reset element 50 may be, but is not limited to, a spring. A first positioning groove corresponding to the first end of the first reset element 50 is provided on the bracket 70. The first end of the first reset element 50 is positioned in the first positioning groove to limit the first reset element 50.

[0097] In some optional embodiments, the second reset element 60 may be, but is not limited to, a spring. A second positioning groove corresponding to the second end of the second reset element 60 is provided on the bracket 70, and the second end of the second reset element 60 is positioned in the second positioning groove to limit the second reset element 60.

[0098] In some optional embodiments, a first positioning groove and a second positioning groove are simultaneously provided at opposite ends of the bracket 70 . The first positioning groove and the second positioning groove are coaxially arranged and separated by a partition wall to simultaneously position the first reset element 50 and the second reset element 60 .

[0099] In this embodiment, the bracket 70 is movably disposed in the conduction chamber 101, and a certain gap exists between the bracket 70 and the inner wall of the conduction chamber 101 of the valve body 10 for gas circulation. At this time, the first reset element 50 and the second reset element 60 have the same elastic coefficient.

[0100] In some optional embodiments, the bracket 70 is limitedly arranged in the conduction chamber 101. At this time, a limit platform is extended from the inner wall of the conduction chamber 101 toward the center of the conduction chamber 101 near the second valve core 40 to limit the displacement distance of the bracket 70 toward the second valve core 40, that is, the limit platform can limit the movement of the bracket 70 toward the second medium opening 103. At this time, the elastic coefficient of the first reset element 50 is greater than the elastic coefficient of the second reset element 60. The bracket 70 and the limit platform isolate the force of the first valve core 30 on the second valve core 40, thereby preventing the force generated by the high air pressure of the intake of the first medium opening 102 from being transmitted to the second valve core 40, which makes the second valve core 40 difficult to open.

[0101] In some optional embodiments, the solenoid valve further includes: a reset element; the reset element is disposed in the conduction chamber 101 , and the reset element elastically drives the first valve core 30 to close the first medium opening 102 , and elastically drives the second valve core 40 to close the second medium opening 103 .

[0102] That is, in this embodiment, the reset element is arranged between the first valve core 30 and the second valve core 40, and the two ends of the reset element are respectively in contact with the first valve core 30 and the second valve core 40. Under normal conditions (when no current is passed through the coil 20), the reset element elastically drives the first valve core 30 to close the first medium opening 102, and elastically drives the second valve core 40 to close the second medium opening 103.

[0103] In this embodiment, which is a preferred embodiment, the reset element may be selected from but not limited to a spring. In order to limit the reset element, a bracket that can limit the reset element can be provided between the first valve core 30 and the second valve core 40. The bracket is movably provided in the conduction chamber 101, and the bracket is provided with a through hole passing through the bracket along the movement direction of the first valve core 30 and / or the second valve core 40. The reset element passes through the through hole of the bracket, and its two ends are respectively connected to the first valve core 30 and the second valve core 40.

[0104] In some optional implementations, a limit platform can be extended and protruded in the axial direction of the conducting chamber 101 at the relative position between the first valve core 30 and the second valve core 40 of the conducting chamber 101. The length of the limit platform along the movement direction of the first valve core 30 and / or the second valve core 40 can be less than the length of the reset element after compression, and the limit platform is provided with a through hole passing through the limit platform along the movement direction of the first valve core 30 and / or the second valve core 40. The reset element passes through the through hole of the limit platform, and its two ends are respectively connected to the first valve core 30 and the second valve core 40.

[0105] In this embodiment, which is a preferred embodiment, a first sealing member 301 is provided on the end face of the first valve core 30 facing the first medium opening 102. The first sealing member 301 can be optionally a rubber pad. The first valve core 30 seals the first medium opening 102 through the first sealing member 301, thereby improving the sealing effect of the first medium opening 102.

[0106] In this embodiment, which is a preferred embodiment, a second sealing member 401 is provided on the end face of the second valve core 40 facing the second medium opening 103. The second sealing member 401 can be optionally a rubber pad. The second valve core 40 seals the second medium opening 103 through the second sealing member 401, thereby improving the sealing effect of the second medium opening 103.

[0107] In this embodiment, which is a preferred embodiment, a slot 105 communicating with the second medium opening 103 is provided on the valve body 10 , and silencer cotton can be embedded in the slot 105 to silence and reduce noise in the deflated state of the solenoid valve.

[0108] In this embodiment, which is a preferred embodiment, the solenoid valve further includes an air inlet nozzle 80 and an air charging nozzle 90 .

[0109] The air inlet nozzle 80 has an air inlet channel 801 , and the inflation nozzle 90 has an inflation channel 901 .

[0110] In this embodiment, the air inlet nozzle 80 can be integrally formed with the end of the valve body 10 where the first medium opening 102 is located, and the air inlet passage 801 is connected to the first medium opening 102. Alternatively, the first medium opening 102 can be formed on the air inlet nozzle 80 and the air inlet nozzle 80 can be sealed and connected to the main body of the guide chamber 10 of the valve body 10 via a third sealing member 810. That is, the first medium opening 102 is provided at the end of the air inlet nozzle 80 connected to the valve body 10 and is connected to the air inlet passage 801, and is also in fluid communication with the guide chamber 101. The connection relationship between the air inlet nozzle 80 and the valve body 10 can be optimized according to actual molding requirements, and this embodiment will not elaborate on this.

[0111] After the air inlet nozzle 80 is connected to the valve body 10 , the air inlet channel 801 is in fluid communication with the first medium opening 102 , so that the valve body 10 is in fluid communication with the air supply unit through the air inlet nozzle 80 .

[0112] In addition, the inflation nozzle 90 can also be integrally formed with the end of the valve body 10 where the third medium opening 104 is located, and the inflation channel 901 is connected to the third medium opening 104. Alternatively, the third medium opening 104 can be formed on the inflation nozzle 90 and the inflation nozzle 90 can be sealed to the main body of the conduction chamber 10 of the valve body 10 via a fourth sealing member. That is, the third medium opening 104 is opened at the end of the inflation nozzle 90 connected to the valve body 10 and is connected to the inflation channel 901, and is also in fluid communication with the conduction chamber 101. The connection relationship between the inflation nozzle 90 and the valve body 10 can be optimized according to actual production requirements and will not be elaborated on in this embodiment.

[0113] After the inflation nozzle 90 is connected to the valve body 10 , the inflation channel 901 is in fluid communication with the third medium opening 104 , so that the valve body 10 is in fluid communication with the gas-using unit through the inflation nozzle 90 .

[0114] In addition, the present invention also provides a pneumatic comfort system, which can be a pneumatic massage system, a pneumatic lumbar support system or a pneumatic side wing support system. Figure 5 As shown, the pneumatic comfort system includes: a plurality of air bags 100, an air supply unit 200 and the solenoid valve described in any of the above embodiments, and the air supply unit 200 is connected to the air bag 100 through the solenoid valve.

[0115] Specifically, the air supply unit 200 is in fluid communication with the first medium opening 102 or the second medium opening 103 of the valve body 10 , and the air bag 100 is in fluid communication with the third medium opening 104 of the valve body 10 .

[0116] In this embodiment, when controlling the inflation and deflation of the pneumatic comfort system, the third medium opening 104 is the inflation port connected to the air bag 100 , the first medium opening 102 is the air inlet connected to the air supply unit 200 , and the second medium opening 103 is the deflation port.

[0117] In view of the structure of the solenoid valve described in the above embodiment, an air inlet nozzle 80 is provided at the end where the first medium opening 102 of the valve body 10 is located, and an inflation nozzle 90 is provided at the end where the third medium opening 104 of the valve body 10 is located. Therefore, the air supply unit 200 is connected to the air inlet nozzle 80 through the tracheal fluid, and the air bag 100 is connected to the inflation nozzle 90 through the tracheal fluid.

[0118] When the solenoid valve places the coil 20 in the first energized state, the first valve core 30 is displaced to open the first medium opening 102, and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102 and the third medium opening 104 are connected. At this time, the air supply unit 200 inflates the air bag 100. When the coil 20 is in the third energized state, the first valve core 30 is displaced to close the first medium opening 102, and the second valve core 40 is displaced to close the second medium opening 103, so that the first medium opening 102, the second medium opening 103 and the third medium opening 104 are disconnected. At this time, the air bag 100 is in a pressure-maintaining state. When the solenoid valve places the coil 20 in the second energized state, the first valve core 30 is displaced to close the first medium opening 102, and the second valve core 40 is displaced to open the second medium opening 103, so that the second medium opening 103 and the third medium opening 104 are connected. At this time, the air bag 100 is deflated through the third medium opening 104 and the second medium opening 103.

[0119] Among them, the coil 20 is in the first energized state, which means that the coil 20 is in a forward current state; the coil 20 is in the second energized state, which means that the coil 20 is in a reverse current state; the coil 20 is in the third energized state, which means that the coil 20 is in an unenergized state, or the coil 20 is in a power-off state.

[0120] In a preferred embodiment, the air supply unit 200 includes an air pump, an air compressor or an air storage device, such as a gas cylinder or an air tank. In other preferred embodiments, the solenoid valve and the air supply unit 200 can also be a pump-valve integrated structure integrating an air valve and an air pump.

[0121] The pneumatic comfort system provided by the embodiment of the present invention adopts the solenoid valve described above to connect the air supply unit 200 and the air bag 100 to control the inflation, deflation or pressure maintenance of the air bag 100. Based on the simple structure of the solenoid valve adopted, the gas flow can be precisely controlled, thereby achieving stable pressure regulation of the air bag 100, so that the pneumatic comfort system has better functional regulation.

[0122] The serial numbers of the embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present invention, which are only examples for clearly illustrating the present invention and do not limit the patent scope of the present invention. For ordinary technicians in the field, other different forms of changes or modifications can be made on the basis of the above description. 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 invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A solenoid valve, characterized in that: include: The valve body (10) is provided with a conduction chamber (101) and a first medium opening (102), a second medium opening (103), and a third medium opening (104) communicating with the conduction chamber (101); a coil (20) wound around the valve body (10); a first valve core (30) disposed in the conduction chamber (101), the first valve core (30) comprising a first permanent magnet; the first valve core (30) can be displaced to close or open the first medium opening (102) under the excitation of the coil (20); and a second valve core (40) disposed in the conduction chamber (101), the second valve core (40) comprising a second permanent magnet, wherein the second permanent magnet and the first permanent magnet have the same pole facing each other; the second valve core (40) can be displaced to close or open the second medium opening (103) under the excitation of the coil (20); The solenoid valve has a first conduction state in which the coil (20) is placed in a first energized state, so that the first valve core (30) is displaced to open the first medium opening (102) and the second valve core (40) is displaced to close the second medium opening (103), so that the first medium opening (102) and the third medium opening (104) are connected; and a second conduction state in which the coil (20) is placed in a second energized state, so that the first valve core (30) is displaced to close the first medium opening (102) and the second valve core (40) is displaced to open. The second medium opening (103) is opened, so that the second medium opening (103) and the third medium opening (104) are in a second conductive state; and the coil (20) is placed in a third energized state, so that the first valve core (30) is displaced to close the first medium opening (102) and the second valve core (40) is displaced to close the second medium opening (103), so that the first medium opening (102), the second medium opening (103) and the third medium opening (104) are in a third conductive state in which the first medium opening (102), the second medium opening (103) and the third medium opening (104) are not conductive.

2. The solenoid valve according to claim 1, characterized in that It also includes a first reset element (50); the first reset element (50) is arranged in the conduction chamber (101) and elastically drives the first valve core (30) to close or open the first medium opening (102).

3. The solenoid valve according to claim 1, characterized in that It also includes a second reset element (60); the second reset element (60) is arranged in the conduction chamber (101) and elastically drives the second valve core (40) to close or open the second medium opening (103).

4. The solenoid valve according to claim 1, characterized in that The invention also includes a first reset element (50), a second reset element (60) and a bracket (70); the bracket (70) is arranged in the conduction chamber (101) and is located between the first valve core (30) and the second valve core (40); the first end of the first reset element (50) is operatively connected to the bracket (70), and the second end is operatively connected to the first valve core (30); the first reset element (50) elastically drives the first valve core (30) to close the first medium opening (102); the second end of the second reset element (60) is operatively connected to the bracket (70), and the first end is operatively connected to the second valve core (40); the second reset element (60) elastically drives the second valve core (40) to close the second medium opening (103).

5. The solenoid valve according to claim 4, characterized in that The bracket (70) is provided with a first positioning groove corresponding to the first end of the first reset element (50), and the first end of the first reset element (50) is positioned in the first positioning groove.

6. The solenoid valve according to claim 4, characterized in that A second positioning groove corresponding to the second end of the second reset element (60) is provided on the bracket (70), and the second end of the second reset element (60) is positioned in the second positioning groove.

7. The solenoid valve according to any one of claims 4 to 6, characterized in that: The bracket (70) is movably arranged in the conduction chamber (101), and the first reset element (50) and the second reset element (60) have the same elastic coefficient.

8. The solenoid valve according to any one of claims 4 to 6, characterized in that: The bracket (70) is limitedly disposed in the conduction chamber (101), and the elastic coefficient of the first reset element (50) is greater than the elastic coefficient of the second reset element (60).

9. The solenoid valve according to claim 1, characterized in that The invention also includes a reset element; the reset element is arranged in the conduction chamber (101), and the reset element elastically drives the first valve core (30) to close the first medium opening (102), and elastically drives the second valve core (40) to close the second medium opening (103).

10. A pneumatic comfort system, characterized in that: include: a plurality of air bags (100); Air supply unit (200); and the solenoid valve according to any one of claims 1 to 9, wherein the air supply unit (200) is connected to the air bag (100) via the solenoid valve; The air supply unit (200) is in fluid communication with the first medium opening (102) or the second medium opening (103) of the valve body (10), and the air bag (100) is in fluid communication with the third medium opening (104) of the valve body (10).

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