A high-redundancy solenoid valve

Abstract

The utility model discloses a kind of high-redundancy solenoid valves, including gas path cover, coil holder, thimble and switch function piece, gas path cover is equipped with first connecting port and second connecting port, coil holder has double coil structure (first coil and second coil), double coil is independently connected with control circuit, any coil is powered and can drive thimble to lift, switch function piece changes state with thimble jacking to cut off gas path communication.The solenoid valve adopts normally open structure to realize power-off gas release, double coil structure improves reliability and service life, to ensure that air mattress can normally release after power-off, improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and more specifically, to a highly redundant solenoid valve. Background Technology

[0002] The massage air mattress provides a massage function. By inflating or deflating air into the massage air mattress, the internal air pressure is changed, altering the mattress's firmness and allowing for periodic expansion and contraction. The key to achieving this function lies in the reliability of the airflow structure, which in turn depends on the quality of the solenoid valve that controls the airflow. As an everyday item with a long maintenance cycle, the quality of the solenoid valve directly determines the functionality of the air mattress.

[0003] Meanwhile, existing air mattresses often use pressure-holding valves in the air circuit structure of reused support air mattresses to adjust the air circuit. The drawback of the pressure-holding valve is that it will maintain a pressure-holding state after the power is cut off, which will cause the gas inside the air mattress to not be fully released, resulting in an uneven mattress surface and a foreign body sensation.

[0004] In summary, there is an urgent need for a highly redundant solenoid valve to improve the redundancy of the air mattress, ensuring the air circuit remains connected to the outside world after a power outage, so that the air mattress can deflate normally. Utility Model Content

[0005] This invention overcomes the shortcomings of existing solenoid valves with low redundancy and provides a highly redundant solenoid valve. It achieves power-off venting by setting it to a normally open structure and improves the reliability and service life of the solenoid valve through a dual-coil structure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A highly redundant solenoid valve includes an air passage cover, a coil frame, a pin, and a switching function. The air passage cover has a first connection port and a second connection port. The coil frame has a first winding area and a second winding area. A first coil and a second coil are wound in the first winding area and the second winding area, respectively. The first coil and the second coil are independently connected to a control circuit. When the first coil or the second coil is energized, the pin can be raised. The switching function changes its state as the pin is raised to cut off the connection between the first connection port and the second connection port.

[0007] Both the first and second coils can independently drive the ejector pin, providing redundancy. This ensures that the first and second connection ports are connected when the solenoid valve is de-energized and disconnected when energized. In application, one of the first and second connection ports connects to the air bladder within the air cushion, while the other connects to an external air passage. When the first connection port is connected to the second connection port, the air cushion is connected to the air passage, enabling inflation or deflation. When the first and second connection ports are disconnected, the air cushion is in a pneumatic hold state.

[0008] This application sets the solenoid valve to a normally open state to release air when power is off. This setting increases the load on the solenoid valve. To reduce the probability of maintenance, a dual-coil structure is used, so that the solenoid valve can function when either coil is working properly, thereby improving the redundancy and service life of the solenoid valve.

[0009] Preferably, the coil frame includes a tube, and the ejector pin is inserted into the tube and can move relative to the inner wall of the tube along the axial direction of the tube. The tube of the coil frame limits the ejector pin, restricting its position during the lifting and lowering process to prevent it from exceeding the set position range.

[0010] Preferably, the coil frame includes a first disc, a second disc, and a third disc extending outward at three height positions along the axial direction of the tube body. The first winding area is formed between the first disc and the second disc, and the second winding area is formed between the second disc and the third disc. The second disc is used for both limiting the first and second coils. By reusing the second disc, the coil frame is made lighter.

[0011] Preferably, in the power-off state, the top of the ejector pin is higher than the first disc, and the bottom of the ejector pin is lower than the third disc. This structure ensures that both the first and second coils can independently drive the ejector pin.

[0012] Preferably, the first connection port is located on the top of the air passage cover, and the second connection port is located on the side wall of the air passage cover. The first connection port extends into the interior of the air passage cover to form an abutment cylinder. The switch function breaks the connection between the first connection port and the second connection port by changing its state to abut against the opening of the abutment cylinder.

[0013] Preferably, the switching component includes a sealing gasket and a resilient spring. The spring is positioned above the ejector pin, and the sealing gasket is positioned above the spring. A blocking block is provided on the top surface of the sealing gasket, located directly below the abutment cylinder. When the ejector pin rises, the spring is forced upward by the ejector pin pressure, pushing the sealing gasket to deform and causing the blocking block to abut against and seal the abutment cylinder. By changing the pressure difference across the spring by the ejector pin, the spring is forced to deform upward, driving the sealing gasket to deform and causing the blocking block to abut against the abutment cylinder, thus disconnecting the first and second connection ports.

[0014] Preferably, the top of the plug is a plane, and on a plane perpendicular to the top surface of the plug, the projection of the opening of the abutment cylinder coincides with the projection of the top surface of the plug. This structure ensures that the contact surface between the plug and the abutment cylinder is planar, avoiding the problem of reduced sealing performance caused by a non-planar contact surface.

[0015] Preferably, the spring includes an outer ring abutment piece and an inner ring elastic portion. In its natural state, the elastic portion is concave downwards, with the depth of concavity gradually decreasing from its center to its outer edge. In a non-stressed state, the elastic portion naturally concaves; under stress and deformation, when the external force is removed, it returns to its concave state through elasticity, thereby releasing the contact between the spring and the sealing gasket and enabling communication between the first and second connection ports.

[0016] Preferably, the bottom of the air passage cover has an abutment edge that fits against the top surface of the outer edge of the sealing gasket, the bottom surface of the outer edge of the sealing gasket fits against the top surface of the outer edge of the spring, and the bottom surface of the outer edge of the spring fits against the top surface of the coil frame. By abutting the sealing gasket and spring with the abutment edge of the air passage cover, positioning is achieved, eliminating the need for positioning components for the sealing gasket and spring, and thus achieving a lightweight design for the solenoid valve.

[0017] Preferably, the coil frame, the ejector pin, and the switching component are housed within the housing, and the gas passage cover is fixedly connected to the housing via fasteners. The fasteners position the gas passage cover and the housing, ensuring the gas passage cover abuts against the sealing gasket and spring.

[0018] Compared with the prior art, the beneficial effects of this utility model are: (1) The dual-coil independent control structure improves the redundancy and reliability of the solenoid valve. Even if one coil fails, the other coil can still work normally. (2) The sealing performance and service life of the solenoid valve are improved by combining the spring and the sealing gasket. Attached Figure Description

[0019] Figure 1 This is an exploded view of the solenoid valve of this utility model.

[0020] Figure 2 This is a cross-sectional view of the solenoid valve of this utility model.

[0021] Figure 3 yes Figure 2 A cross-sectional view of a solenoid valve when energized.

[0022] Figure 4 This is a schematic diagram of the coil frame of this utility model.

[0023] In the picture: 1. Air passage cover, 2. Coil frame, 3. Ejector pin, 4. Switch function component, 5. First winding area, 6. Second winding area, 7. Tube body, 8. First disc body, 9. Second disc body, 10. Third disc body, 11. First connection port, 12. Second connection port, 13. Sealing gasket, 14. Spring piece, 15. Block, 16. Abutment piece, 17. Elastic part, 18. Abutment edge, 19. Outer shell, 20. First coil, 21. Second coil, 22. Abutment cylinder, 23. Fastener. Detailed Implementation

[0024] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements in this disclosure, and do not specifically refer to any component or element in this disclosure, nor should they be construed as limiting this disclosure.

[0028] In this disclosure, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this disclosure based on the specific circumstances, and they should not be construed as limitations on this disclosure.

[0029] Example: The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, this embodiment provides a highly redundant solenoid valve, including an air passage cover 1, a coil frame 2, a pin 3, and a switching function 4. The top of the air passage cover 1 is provided with a first connection port 11, and the side wall is provided with a second connection port 12. The first connection port 11 extends into the air passage cover 1 to form an abutment cylinder 22.

[0031] like Figure 4 As shown, the coil frame 2 has a tube 7, and the ejector pin 3 is inserted into the tube 7 and can move along its axial direction. In some embodiments, the inner diameter of the tube 7 matches the inner diameter of the ejector pin 3 so that the two are slidably connected. In a further embodiment, a lubricant is provided between the two, or the tube is made of a self-lubricating material. The coil frame 2 has three outwardly extending discs along the axial direction of the tube 7: a first disc 8, a second disc 9, and a third disc 10. The three discs are equally spaced. The first disc 8 and the second disc 9 form a first winding area 5, and the second disc 9 and the third disc 10 form a second winding area 6. Specifically, taking the first winding area 5 as an example, the wire harness is evenly arranged around the outer wall of the tube 7 between the first disc 9 and the second disc 10, thus realizing the first coil 20. By extension, the first winding area 5 and the second winding area 6 are respectively wound with the first coil 20 and the second coil 21, and the two are independently connected to the control circuit. Either coil being energized can drive the ejector pin 3 to rise. Correspondingly, the control circuit is connected to the first coil 20 and the second coil 21 respectively. The internal control logic is set to switch the connection with the first coil 20 and the second coil 21 in turn as needed, and to issue an alarm when any coil fails. The control logic of the external circuit is not part of the invention of this application. Those skilled in the art can configure the above logic as needed. The description of the above control logic in this embodiment is only used to better describe the relevant technical features.

[0032] The switch component 4 includes a sealing gasket 13 and a spring piece 14. The spring piece 14 is positioned above the ejector pin 3, and the sealing gasket 13 is positioned above the spring piece 14. A blocking block 15, corresponding to the position of the abutment cylinder 22, is provided on the top surface of the sealing gasket 13. The spring piece 14 consists of an outer abutment piece 16 and an inner elastic part 17. The elastic part 17 is concave downwards in its natural state. This natural state refers to the state in which the elastic part 17 exhibits itself when the pressure difference between its upper and lower sides is essentially zero. The top surface of the blocking block 15 is a plane that can fit against the opening of the abutment cylinder 22 to achieve a seal. If necessary, a sealing ring can also be embedded on the surface of the blocking block 15 to enhance the sealing performance. The top surface of the blocking block 15 can completely cover the opening of the abutment cylinder 22, thereby achieving the sealing function.

[0033] The bottom of the gas duct cover 1 has an abutment edge 18 that fits against the top surface of the outer edge of the sealing gasket 13. The bottom surface of the outer edge of the sealing gasket 13 fits against the top surface of the abutment ring 16, and the bottom surface of the outer edge of the spring piece 14 fits against the top surface of the coil frame 2. The coil frame 2, the ejector pin 3, and the switch function component 4 are all housed within the housing 19, and the gas duct cover 1 and the housing 19 are fixedly connected by fasteners 23. Through the fasteners, the abutment edge 18 applies prestress to the sealing gasket 13 and the abutment ring 16, and the step surface inside the housing is used to position the sealing gasket 13 and the spring piece 14.

[0034] like Figure 2 , Figure 3 As shown, the working principle is as follows: In the power-off state, the ejector pin 3 is in the low position, the elastic part 17 of the spring piece 14 is recessed downwards, the block 15 on the sealing gasket 13 is separated from the abutment cylinder 22, and the first connection port 11 and the second connection port 12 remain connected. When the first coil 20 or the second coil 21 is energized, the generated electromagnetic force drives the ejector pin 3 to rise axially along the tube body 7. The top of the ejector pin 3 pushes the elastic part 17 of the spring piece 14 to bulge upwards, thereby pushing the sealing gasket 13 to deform, causing the block 15 to abut against and seal the abutment cylinder 22, thereby cutting off the connection between the first connection port 11 and the second connection port 12.

[0035] In application, the first connection port 11 can be connected to the airbag of the air mattress, and the second connection port 12 can be connected to the external air circuit. When power is off, the solenoid valve is in the normally open state, and the airbag is connected to the external air circuit, realizing automatic deflation; when power is on, the solenoid valve is closed, the airbag is disconnected from the external air circuit, and the pressure is maintained. The dual-coil structure ensures that even if one coil fails, the other coil can still work normally, which greatly improves the redundancy and service life of the solenoid valve.

[0036] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A highly redundant solenoid valve, characterized in that, The device includes an air passage cover (1), a coil frame (2), a pin (3), and a switch function (4). The air passage cover (1) has a first connection port (11) and a second connection port (12). The coil frame (2) has a first winding area (5) and a second winding area (6). The first winding area (5) and the second winding area (6) are respectively wound with a first coil (20) and a second coil (21). The first coil (20) and the second coil (21) are independently connected to the control circuit. When the first coil (20) or the second coil (21) is energized, the pin (3) can be raised. The switch function (4) changes its state as the pin (3) is raised to cut off the connection between the first connection port (11) and the second connection port (12).

2. The highly redundant solenoid valve according to claim 1, characterized in that, The coil frame (2) includes a tube (7), and the pin (3) is inserted into the tube (7) and can move relative to the inner wall of the tube (7) along the axial direction of the tube (7).

3. A highly redundant solenoid valve according to claim 2, characterized in that, The coil frame (2) includes a first disc (8), a second disc (9) and a third disc (10) extending outward from three height positions along the axial direction of the tube (7). The first winding area (5) is formed between the first disc (8) and the second disc (9), and the second winding area (6) is formed between the second disc (9) and the third disc (10).

4. A highly redundant solenoid valve according to claim 3, characterized in that, In the power-off state, the top of the ejector pin (3) is higher than the first disc (8), and the bottom of the ejector pin (3) is lower than the third disc (10).

5. A highly redundant solenoid valve according to claim 1, characterized in that, The first connection port (11) is located on the top of the air passage cover (1), and the second connection port (12) is located on the side wall of the air passage cover (1). The first connection port (11) extends into the interior of the air passage cover (1) to form an abutment cylinder (22). The switch function (4) disconnects the connection between the first connection port (11) and the second connection port (12) by changing its state to abut against the opening of the abutment cylinder (22).

6. A highly redundant solenoid valve according to claim 5, characterized in that, The switching function (4) includes a sealing gasket (13) and an elastic spring sheet (14). The spring sheet (14) is located above the ejector pin (3), and the sealing gasket (13) is located above the spring sheet (14). A blocking block (15) is provided on the top surface of the sealing gasket (13). The blocking block (15) is located directly below the abutment cylinder (22). When the ejector pin (3) is raised, the spring sheet (14) is forced to bulge upward by the pressure of the ejector pin (3) and pushes the sealing gasket (13) to deform so that the blocking block (15) abuts against and seals the abutment cylinder (22).

7. A highly redundant solenoid valve according to claim 6, characterized in that, The top of the block (15) is a plane, and on a plane perpendicular to the top surface of the block (15), the projection of the opening of the abutment cylinder (22) coincides with the projection of the top surface of the block (15).

8. A highly redundant solenoid valve according to claim 6, characterized in that, The spring (14) includes an outer ring abutment piece (16) and an inner ring elastic part (17). The elastic part (17) is recessed downward in its natural state, and the recess depth of the elastic part (17) gradually decreases from the center to the outer edge.

9. A highly redundant solenoid valve according to claim 6, characterized in that, The bottom of the air passage cover (1) is provided with an abutting edge (18), which is in contact with the top surface of the outer edge of the sealing gasket (13), the bottom surface of the outer edge of the sealing gasket (13) is in contact with the top surface of the outer edge of the spring piece (14), and the bottom surface of the outer edge of the spring piece (14) is in contact with the top surface of the coil frame (2).

10. A highly redundant solenoid valve according to claim 9, characterized in that, The coil frame (2), the ejector pin (3) and the switch function (4) are housed in the housing (19), and the air passage cover (1) is fixedly connected to the housing (19) by the fastener (23).

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