Air distribution valve structure

Abstract

The utility model provides an air distribution valve structure, including shell body, valve core subassembly and electromagnetic coil, valve core subassembly includes coaxial setting's connecting seat, sleeve, magnetic conducting part and armature, connecting seat fixed setting is on the installation mouth, and the lower part of connecting seat extends to the cavity, magnetic conducting part passes through sleeve and connecting seat lower part fixed connection, the through -hole that is provided with with sleeve inner chamber intercommunication in connecting seat inside axial, armature is connected in the through -hole and lifts, the bottom surface of armature concentricity sets up first recess and second recess, first spring is equipped in first recess, second spring is equipped in second recess. This structure adopts double spring structure, can provide more stable reset spring force together, effectively alleviatees the spring force attenuation problem of single spring because of metal fatigue, when power off, double spring cooperation promotes armature quick rebound, promotes the timeliness of gas circuit switching, enhances the sealing reliability of armature to first gas port, reduces the air leakage risk, provides the guarantee for the stable operation of air suspension system.

Description

Technical Field

[0001] This utility model relates to the field of distribution valve technology, and more specifically, to an air distribution valve structure. Background Technology

[0002] In the modern automotive industry, the air distribution valve, as a core control component of the air suspension system, is widely used in mid-to-high-end sedans and SUVs. Its core function is to dynamically balance the vehicle's height during driving by precisely controlling the inflation and deflation of the air springs, thereby significantly improving vehicle stability, ride comfort, and off-road capability. When the vehicle is driving on rough roads or when the load changes, the air distribution valve can quickly respond to the change in vehicle height signal, either by opening the intake channel to inflate the air springs to raise the vehicle or by opening the exhaust channel to deflate the air springs to lower the vehicle, ensuring that the vehicle is always in an optimal posture.

[0003] The current mainstream air distribution valve adopts the electromagnetic drive principle. Its core structure includes an electromagnetic coil and a valve core assembly (including an armature, a magnetic conductor, and a spring). When in operation, the coil is energized to generate electromagnetic force, which drives the armature to attract the magnetic conductor, connecting the first air port and the second air port to inflate the airbag. After the power is cut off, the spring force pushes the armature to reset, blocking the first air port and cutting off the air passage.

[0004] However, the existing design using only a single spring has significant drawbacks: after prolonged use, the spring is prone to fatigue due to metal fatigue, leading to a decrease in elasticity. This not only reduces the rebound response speed after the armature is de-energized, affecting the timeliness of air circuit switching, but may also cause the armature to fail to completely seal the first air port, resulting in air leakage. This defect directly leads to unstable air pressure in the air suspension system, reduced vehicle height adjustment accuracy, and even exacerbates vehicle bumps and safety hazards during driving, severely shortening the service life of the valve body. Utility Model Content

[0005] This invention addresses the technical problem of slow response, short service life, and air leakage in existing distribution valves that rely on only one spring. To overcome these shortcomings, this invention provides a method that adds a second spring between the armature and the magnetic conductor. The dual-spring structure provides a more stable reset force, ensuring that the armature quickly rebounds and tightly seals the first air port when power is off. This improves the reliability of the air distribution valve, extends its service life, and provides crucial support for the stable operation of the air suspension system.

[0006] To achieve the purpose of this utility model, the following technical solution is adopted: An air distribution valve structure includes a housing, a valve core assembly, and an electromagnetic coil. The housing contains a cavity; the top surface of the housing has a mounting port communicating with the cavity; the valve core assembly is mounted on the mounting port; the electromagnetic coil is disposed within the cavity and located between the housing and the valve core assembly; the valve core assembly includes a coaxially arranged connecting seat, a sleeve, a magnetic conductor, and an armature; the connecting seat is fixedly mounted on the mounting port, and its lower part extends into the cavity; the magnetic conductor is fixedly connected to the lower part of the connecting seat via the sleeve, and the connecting seat has an axially penetrating through-hole communicating with the inner cavity of the sleeve; the armature is vertically connected within the through-hole, and the bottom surface of the armature has a first groove and a second groove concentrically arranged; a first spring is disposed in the first groove, with its upper end abutting against the bottom of the first groove and its lower end abutting against the top surface of the magnetic conductor; a second spring is disposed in the second groove, with its upper end abutting against the bottom of the second groove and its lower end abutting against the top surface of the magnetic conductor. This structure employs a dual-spring design, which, compared to the single spring in existing technologies, provides a more stable restoring force, effectively mitigating the force attenuation problem caused by metal fatigue in a single spring. In the event of a power outage, the dual springs work together to rapidly push the armature back, accelerating the response of the solenoid valve and ensuring timely sealing of the first air port, thus improving the timeliness of air path switching. This enhances the sealing reliability of the armature to the first air port, reducing the risk of leakage, thereby improving the operational stability of the air distribution valve, extending its service life, and ensuring the stable operation of the air suspension system.

[0007] Preferably, the first groove is disposed on the bottom surface of the armature, and the second groove is disposed at the center of the bottom of the first groove to form an axially connected stepped groove, with the groove diameter of the second groove being smaller than that of the first groove; the upper ends of the first spring and the first groove abut against the bottom of the first groove, and the upper end of the second spring abuts against the bottom of the second groove. The stepped groove structure ensures that the first and second springs are concentrically nested, guaranteeing that the spring force directions of the two springs are consistent, avoiding uneven force distribution caused by lateral spring offset; it also limits the installation position of the springs, improving the stability of the dual-spring collaborative operation, further ensuring coaxiality during armature reset, and enhancing the sealing effect.

[0008] Preferably, the top surface of the magnetic conductor is provided with a limiting groove concentrically arranged with the stepped groove; the upper end of the second spring abuts against the bottom of the second groove, and the lower end of the second spring abuts against the bottom of the limiting groove. The limiting groove provides radial positioning for the second spring, preventing it from shifting or tilting laterally during compression / elongation; at the same time, it ensures that the second spring is always subjected to axial force, working in conjunction with the first spring to stably provide the reset force, improving the armature reset accuracy and reducing the risk of seal failure due to spring offset.

[0009] Preferably, the valve core assembly further includes a connector and a bushing; the lower part of the bushing is fixedly connected to the connecting seat, and the upper part of the bushing is fixedly connected to the connector, and the bushing, connector, and connecting seat are coaxially arranged. A first air port communicating with the inner cavity of the bushing is axially provided through the connector; a second air port communicating with the inner cavity of the bushing is provided on the outer wall of the bushing; the upper end of the armature passes through the connecting seat and cooperates with the first air port. When the power is off, the upper end of the armature blocks the first air port under the action of the first spring and the second spring. The air circuit structure is improved by the connector and bushing to realize the "inlet-outlet" passage design to meet the air charging and discharging requirements of the air suspension system; the cooperation structure between the armature and the first air port, combined with the restoring force of the double springs, ensures that the armature reliably blocks the first air port when the power is off and smoothly disengages when the power is on, improving the accuracy of air circuit control; and the coaxial arrangement of the bushing, connecting seat, and connector ensures smooth air circuit and reduces airflow resistance.

[0010] Preferably, the through hole includes a first stepped hole and a second stepped hole arranged concentrically, with the first stepped hole located above the second stepped hole and its diameter smaller than that of the second stepped hole. The armature is vertically and movably connected within the second stepped hole. The upper end of the armature protrudes with a stepped protrusion that decreases in size from bottom to top, including a lower first protrusion and an upper second protrusion. The first protrusion is located within the first stepped hole, and the second protrusion extends outside the connecting seat to mate with the first air port. The engagement of the stepped hole and the stepped protrusion guides the vertical movement of the armature, restricts lateral displacement of the armature, and ensures stable axial movement. This improves the fitting accuracy between the armature and the first air port, further reduces the risk of air leakage, and enhances operational stability.

[0011] Preferably, the upper end of the second protrusion is provided with a barbed structure, and a sealing gasket is fitted on the barbed structure; when energized, the top surface of the sealing gasket is sealed to the bottom end of the first air port. The barbed structure can fix the sealing gasket, preventing it from falling off during armature movement and ensuring the reliability of the sealing gasket; the sealing gasket enhances the sealing effect between the armature and the first air port, further reducing the probability of air leakage and improving the sealing performance when the air circuit is closed.

[0012] Preferably, a first limiting protrusion is provided circumferentially on the outer peripheral wall of the connector; the upper part of the bushing is welded and fixed to the lower part of the connector, and the upper end of the bushing abuts against the bottom surface of the first limiting protrusion. A first sealing ring is also fitted on the top surface of the first limiting protrusion. The first limiting protrusion plays a positioning role in the connection between the bushing and the connector, ensuring their coaxiality; welding and fixing enhance the connection strength and prevent loosening; the first sealing ring improves the sealing performance of the connection between the connector and external components, avoids gas leakage at the first air port, and ensures air intake efficiency.

[0013] Preferably, a second limiting protrusion is provided circumferentially on the outer peripheral wall of the connecting seat; the bottom surface of the second limiting protrusion abuts against the top surface of the outer casing; the lower part of the bushing is welded and fixed to the upper part of the connecting seat, and the lower end of the bushing abuts against the top surface of the second limiting protrusion; a second sealing ring is also fitted on the top surface of the second limiting protrusion outside the bushing. The second limiting protrusion positions the connecting seat and the outer casing, and simultaneously limits the connection between the bushing and the connecting seat; welding and fixing enhance structural stability; the second sealing ring improves the sealing between the connecting seat and the outer casing, prevents gas leakage in the cavity, protects internal components such as the electromagnetic coil, and extends the valve body's lifespan.

[0014] Preferably, the upper part of the sleeve is welded and fixed to the lower part of the armature; the lower part of the sleeve is welded and fixed to the upper part of the magnetic conductor. This welding method ensures the connection strength between the sleeve and the armature and magnetic conductor, preventing structural deformation of the valve core assembly due to loosening during long-term operation; it also ensures the coaxiality of the armature, sleeve, and magnetic conductor, guaranteeing the stability of the armature's lifting movement and the lifting space, and improving the response accuracy of electromagnetic engagement and spring reset.

[0015] Preferably, a radially protruding ring is provided circumferentially on the outer peripheral wall of the bottom of the armature to increase the contact area between the armature and the magnetic conductor. By increasing the contact area between the armature and the magnetic conductor through the radially protruding ring, the electromagnetic attraction force between the two is more uniform and stable when the electromagnetic coil is energized; the reliability and response speed of the armature and magnetic conductor attraction are improved, ensuring rapid air circuit connection when energized, and enhancing the dynamic response performance of the valve body.

[0016] In summary, the advantages of this utility model include the following five points: 1. Improve reset reliability and solve air leakage problem: In existing technologies, a single spring is prone to spring force decay due to metal fatigue, resulting in untimely armature reset and air leakage due to poor sealing. This application sets up a double spring (a first spring and a second spring) between the armature and the magnetic conductor, and ensures the stable coaxial operation of the two springs through stepped grooves, limiting grooves, and other structures. This allows them to jointly provide a more durable and stable reset spring force, ensuring that the armature quickly rebounds and tightly seals the first air port when power is cut off, fundamentally reducing the risk of air leakage and ensuring stable air pressure in the air suspension system.

[0017] 2. Optimize structural stability and enhance working accuracy: Through coaxial design (such as the coaxial setting of connecting seat, sleeve, magnetic conductor, armature, bushing, and connector), stepped fit (armature stepped protrusion and connecting seat stepped hole), and welding fixation (sleeve and armature / magnetic conductor, bushing and connecting seat / connector), the structure of each component ensures the guidance and stability of the armature lifting movement, avoids the decrease in air circuit control accuracy caused by lateral offset, and makes the switching of "power on air intake and power off air shut off" more precise and timely, improving the response speed and accuracy of vehicle body height adjustment.

[0018] 3. Enhanced sealing performance and reduced energy loss: In addition to the double springs ensuring the armature seals the first air port, the sealing effect between the armature and the first air port is enhanced by the sealing gasket (fixed by the barbed structure on the second protrusion of the armature). The first sealing ring (at the connector) and the second sealing ring (at the connector and the outer shell) respectively improve the sealing performance of the external connection and the internal cavity, reducing gas leakage in all aspects, reducing the energy loss of the air suspension system, and improving work efficiency.

[0019] 4. Extend service life and reduce maintenance costs: The dual-spring design alleviates the metal fatigue problem of the single spring, the welding fixation enhances the connection strength of the components, the sealing ring and sealing gasket reduce the wear of components caused by air leakage, and the radial convex ring improves the stability of electromagnetic attraction by increasing the contact area between the armature and the magnetic conductor. These designs together extend the overall service life of the valve body and reduce the frequency and cost of vehicle maintenance.

[0020] 5. Ensuring stable system operation and improving vehicle performance: This application solves the problems of slow response, air leakage, and low precision in the prior art, ensuring that the air distribution valve can accurately regulate the inflation and deflation of the spring airbags, so that the vehicle body height always maintains the optimal posture when driving on rough roads or when the load changes, thereby improving driving stability, ride comfort and passability, and providing key guarantee for the stable operation of the air suspension system. Attached Figure Description

[0021] Figure 1 is a structural schematic diagram of the air distribution valve structure of this utility model. Figure 2 is a cross-sectional view of the air distribution valve structure of this utility model. Figure 3 is an exploded view of the air distribution valve structure of this utility model. Figure 4 is a structural schematic diagram of the valve core assembly of this utility model. Figure 5 is a cross-sectional view of the valve core assembly of this utility model. Explanation of reference numerals:

[0022] 1. Outer shell; 11. Cavity; 12. Mounting port; 2. Electromagnetic coil; 3. Connecting seat; 31. Through hole; 311. First stepped hole; 312. Second stepped hole; 32. Second limiting protrusion ring; 4. Sleeve; 5. Magnetic conductor; 51. Limiting groove; 6. Armature; 601. First spring; 602. Second spring; 61. First groove; 62. Second groove; 63. First protrusion; 64. Second protrusion; 65. Radial protrusion ring; 7. Connector; 71. First air port; 72. First limiting protrusion ring; 73. First sealing ring; 8. Bushing; 81. Second air port; 82. Second sealing ring; 9. Sealing gasket; 10. Bottom cover. Detailed Implementation

[0023] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 5As shown, an air distribution valve structure includes a housing 1, a valve core assembly, and an electromagnetic coil 2. The housing 1 is cylindrical and has a cavity 11 inside. A mounting port 12 communicating with the cavity 11 is provided on the top surface of the housing 1. The valve core assembly is vertically (axially) mounted on the mounting port 12, with its upper end passing through the top of the housing 1 and its lower end passing through the bottom of the housing 1. The electromagnetic coil 2 is disposed within the cavity 11 and located between the housing 1 and the valve core assembly. A bottom cover 10 is also provided at the bottom of the housing 1, which confines the electromagnetic coil 2 within the housing 1 and positions the bottom of the valve core assembly. The valve core assembly includes a coaxially arranged connecting seat 3, sleeve 4, magnetic conductor 5, armature 6, connector 7, and bushing 8. The connecting seat 3 is fixedly mounted on the mounting port 12, and the lower part of the connecting seat 3 extends into the cavity 11. The magnetic conductor 5 is fixedly connected to the lower part of the connecting seat 3 through the sleeve 4. The connecting seat 3 has an axially penetrating through hole 31 that communicates with the inner cavity of the sleeve 4. The armature 6 is flexibly connected in the through hole 31. The bottom surface of the armature 6 is concentrically provided with a first groove 61 and a second groove 62. A first spring 601 is provided in the first groove 61, and the upper end of the first spring 601 abuts against the bottom of the groove 61, and the lower end of the first spring 601 abuts against the top surface of the magnetic conductor 5. A second spring 602 is provided in the second groove 62, and the upper end of the second spring 602 abuts against the bottom of the groove 62, and the lower end of the second spring 602 abuts against the top surface of the magnetic conductor 5. This structure employs a dual-spring design (first spring 601 and second spring 602), which, compared to the single spring in existing technologies, can jointly provide a more stable reset force, effectively alleviating the problem of force attenuation caused by metal fatigue in a single spring. When power is off, the dual springs work together to push the armature 6 to rebound quickly, accelerating the response of the solenoid valve and ensuring that it seals the first air port 71 in a timely manner, thus improving the timeliness of air circuit switching. This enhances the sealing reliability of the armature 6 to the first air port 71, reduces the risk of air leakage, thereby improving the working stability of the air distribution valve, extending its service life, and providing a guarantee for the stable operation of the air suspension system. The lower part of the bushing 8 is fixedly connected to the connecting seat 3, and the upper part of the bushing 8 is fixedly connected to the connecting head 7. The connecting head 7 is axially provided with a first air port 71 that communicates with the inner cavity of the bushing 8. The outer wall of the bushing 8 is provided with a second air port 81 that communicates with the inner cavity of the bushing 8. The upper end of the armature 6 passes through the connecting seat 3 and cooperates with the first air port 71. When the power is off, the upper end of the armature 6 blocks the first air port 71 under the action of the first spring 601 and the second spring 602.The air passage structure is improved by connecting head 7 and bushing 8 (first air port 71 → inner cavity of bushing 8 → second air port 81), realizing the "inlet-out" passage design to meet the air charging and discharging requirements of the air suspension system; the cooperation structure between armature 6 and first air port 71, combined with the reset force of double springs, ensures that armature 6 reliably blocks first air port 71 to cut off the air passage when power is off, and smoothly disconnects from the connected air passage when power is on, improving the accuracy of air passage control; and the parts in the valve core assembly are all coaxially arranged to ensure smooth air passage and reduce airflow resistance.

[0028] like Figure 5 As shown, the first groove 61 is set on the bottom surface of the armature 6, and the second groove 62 is set at the center of the bottom of the first groove 61, forming an axially connected stepped groove. Both the first groove 61 and the second groove 62 are circular grooves, and the groove diameter of the second groove 62 is smaller than that of the first groove 61. The outer diameter of the first spring 601 matches the groove diameter of the first groove 61, thus better limiting the first spring 601. The upper end of the first spring 601 and the first groove 61 abut against the bottom of the first groove 61. The outer diameter of the second spring 602 matches the groove diameter of the second groove 62, and the upper end of the second spring 602 abuts against the bottom of the second groove 62. The stepped groove structure allows the first spring 601 and the second spring 602 to be coaxially nested, ensuring that the spring force of the two springs is in the same direction (along the axial direction), avoiding uneven force caused by lateral spring offset; and limiting the installation position of the springs, improving the stability of the two springs working together, further ensuring the coaxiality of the armature 6 during reset, and enhancing the sealing effect. The depth of the second groove 62 is greater than that of the first groove 61. A limiting groove 51, coaxially aligned with the stepped groove, is provided on the top surface of the magnetic conductor 5. The upper end of the second spring 602 abuts against the bottom of the second groove 62, and the lower end of the second spring 602 abuts against the bottom of the limiting groove 51. The second groove 62 and the limiting groove 51 provide radial positioning for the second spring 602, preventing lateral displacement or tilting during compression / elongation. Simultaneously, they ensure that the second spring 602 is always subjected to axial force, working in conjunction with the first spring 601 to stably provide a reset force, improving the reset accuracy of the armature 6 and reducing the risk of seal failure due to spring displacement.

[0029] like Figures 2 to 5As shown, the through hole 31 includes a first stepped hole 311 and a second stepped hole 312 coaxially arranged. The first stepped hole 311 is located above the second stepped hole 312, and the diameter of the first stepped hole 311 is smaller than that of the second stepped hole 312. The armature 6 is vertically and movably connected within the second stepped hole 312. The upper end of the armature 6 has a stepped protrusion that gradually decreases in size from bottom to top. The stepped protrusion includes a lower first protrusion 63 and an upper second protrusion 64. The first protrusion 63 is located within the first stepped hole 311. The second protrusion 64 extends to the outside of the connecting seat 3 and mates with the first air port 71. The engagement of the stepped hole and the stepped protrusion guides the vertical movement of the armature 6, restricts the lateral displacement of the armature 6, and ensures its stable axial movement. It also improves the fitting accuracy between the armature 6 and the first air port 71, avoiding poor sealing or blocked air passages due to displacement, further reducing the risk of air leakage and enhancing operational stability.

[0030] like Figures 2 to 5 As shown, the upper end of the second protrusion 64 is provided with a barbed structure, and a sealing gasket 9 is fitted on the barbed structure; when energized, the top surface of the sealing gasket 9 seals against the bottom end of the first air port 71. The barbed structure can fix the sealing gasket 9, preventing it from falling off during the movement of the armature 6 and ensuring the reliability of the sealing gasket 9; the sealing gasket 9 enhances the sealing effect between the armature 6 and the first air port 71 (compared to a hard contact seal), further reducing the probability of air leakage and improving the sealing performance when the air circuit is closed.

[0031] like Figures 2 to 5 As shown, a first limiting protrusion ring 72 is provided circumferentially on the outer peripheral wall of the connector 7; the inner peripheral wall of the upper part of the bushing 8 is welded and fixed to the outer peripheral wall of the lower part of the connector 7, and the upper end of the bushing 8 abuts against the bottom surface of the first limiting protrusion ring 72. A first sealing ring 73 is also fitted on the top surface of the first limiting protrusion ring 72. The first limiting protrusion ring 72 plays a positioning role in the connection between the bushing 8 and the connector 7, ensuring their coaxiality. The welding fixation enhances the connection strength and prevents loosening. The first sealing ring 73 improves the sealing performance of the connection between the connector 7 and external components (such as air source pipelines), avoids gas leakage at the first air port 71, and ensures air intake efficiency. A second limiting protrusion ring 32 is circumferentially provided on the outer peripheral wall of the connecting seat 3; the bottom surface of the second limiting protrusion ring 32 abuts against the top surface of the outer shell 1; the inner peripheral wall of the lower part of the bushing 8 is welded and fixed to the outer peripheral wall of the upper part of the connecting seat 3, and the lower end of the bushing 8 abuts against the top surface of the second limiting protrusion ring 32; a second sealing ring 82 is also sleeved on the top surface of the second limiting protrusion ring 32 outside the bushing 8. The second limiting protrusion ring 32 positions the connecting seat 3 and the outer shell 1, and at the same time limits the connection between the bushing 8 and the connecting seat 3. Welding and fixing enhance the structural stability; the second sealing ring 82 improves the sealing between the connecting seat 3 and the outer shell 1, prevents gas leakage in the cavity 11 (or external dust and moisture entering the cavity 11), protects internal components such as the electromagnetic coil 2, and extends the valve body life.

[0032] like Figure 4 and Figure 5 As shown, the inner circumferential wall of the upper part of the sleeve 4 is welded and fixed to the outer circumferential wall of the lower part of the connecting seat 3; the inner circumferential wall of the lower part of the sleeve 4 is welded and fixed to the outer circumferential wall of the upper part of the magnetic conductor 5. The welding and fixing method ensures the connection strength between the sleeve 4 and the connecting seat 3 and the magnetic conductor 5, avoiding structural deformation of the valve core assembly due to loosening of the connection during long-term operation; it also ensures the coaxiality of the connecting seat 3, the sleeve 4, and the magnetic conductor 5, ensuring the stability of the lifting and lowering movement of the armature 6 and the lifting and lowering space, and improving the response accuracy of electromagnetic engagement and spring reset.

[0033] like Figure 5 As shown, a radial protruding ring 65 is provided circumferentially on the outer peripheral wall at the bottom of the armature 6 to increase the contact area between the armature 6 and the magnetic conductor 5. By increasing the contact area between the armature 6 and the magnetic conductor 5 through the radial protruding ring 65, the electromagnetic attraction force between the two is more uniform and stable when the electromagnetic coil 2 is energized; the reliability and response speed of the engagement between the armature 6 and the magnetic conductor 5 are improved (the engagement delay is reduced), ensuring rapid air passage connection when energized, and enhancing the dynamic response performance of the valve body.

[0034] In the energized state: When the electromagnetic coil 2 is energized, it generates a strong electromagnetic force, attracting the armature 6 to move downwards (towards the guide magnet 5), compressing the first spring 601 and the second spring 602. The sealing gasket 9 at the upper end of the armature 6 moves downwards with the armature 6, disengaging from the first air port 71 and releasing the blockage. External air enters the inner cavity of the bushing 8 through the first air port 71 of the connector 7, and then flows into the spring air bladder through the second air port 81 on the outer wall of the bushing 8, thus inflating it. The armature 6 remains stable under the balance of electromagnetic force and spring force, ensuring unobstructed airflow. The first air port 71 and the second air port 81 in this air distribution valve structure are interchangeable, allowing air to enter through the second air port 81 and exit through the first air port 71, with the same ventilation principle. In practical applications, the appropriate port can be selected based on specific needs.

[0035] In the power-off state: After the electromagnetic coil 2 is de-energized, the electromagnetic force disappears instantly, releasing the elastic force of the first spring 601 and the second spring 602, pushing the armature 6 upward. The sealing gasket 9 at the upper end of the armature 6 re-fits with the first air port 71, tightly sealing the first air port 71 and stopping the inflation. The synergistic effect of the two springs ensures that the armature 6 quickly resets, avoiding air leakage caused by reset delay and ensuring timely cut-off of the air path. The first air port 71 and the second air port 81 in this air distribution valve structure can be interchanged, allowing air to enter through the second air port 81 and exit through the first air port 71, with the same ventilation principle. In practical applications, the choice can be made according to specific needs.

[0036] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0037] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air distribution valve structure, comprising a housing (1), a valve core assembly, and an electromagnetic coil (2), wherein a cavity (11) is provided inside the housing (1); a mounting port (12) communicating with the cavity (11) is provided on the top surface of the housing (1); the valve core assembly is mounted on the mounting port (12); the electromagnetic coil (2) is disposed inside the cavity (11) and located between the housing (1) and the valve core assembly; characterized in that, The valve core assembly includes a coaxially arranged connecting seat (3), sleeve (4), magnetic conductor (5), and armature (6); the connecting seat (3) is fixedly mounted on the mounting port (12), and the lower part of the connecting seat (3) extends into the cavity (11); the magnetic conductor (5) is fixedly connected to the lower part of the connecting seat (3) through the sleeve (4), and the connecting seat (3) has an axially penetrating through hole (31) communicating with the inner cavity of the sleeve (4); the armature (6) is vertically connected in the through hole (31), and the bottom surface of the armature (6) is concentric. A first groove (61) and a second groove (62) are provided; a first spring (601) is provided in the first groove (61), and the upper end of the first spring (601) abuts against the bottom of the first groove (61), and the lower end of the first spring (601) abuts against the top surface of the magnetic conductor (5); a second spring (602) is provided in the second groove (62), and the upper end of the second spring (602) abuts against the bottom of the second groove (62), and the lower end of the second spring (602) abuts against the top surface of the magnetic conductor (5).

2. The air distribution valve structure according to claim 1, characterized in that, The first groove (61) is disposed on the bottom surface of the armature (6), and the second groove (62) is disposed at the center of the bottom of the first groove (61) to form an axially connected stepped groove, and the groove diameter of the second groove (62) is smaller than the groove diameter of the first groove (61); the upper end of the first spring (601) and the first groove (61) abut against the bottom of the first groove (61), and the upper end of the second spring (602) abuts against the bottom of the second groove (62).

3. The air distribution valve structure according to claim 2, characterized in that, The top surface of the magnetic conductor (5) is provided with a limiting groove (51) that is concentric with the stepped groove; the upper end of the second spring (602) abuts against the bottom of the second groove (62), and the lower end of the second spring (602) abuts against the bottom of the limiting groove (51).

4. The air distribution valve structure according to claim 1, characterized in that, The valve core assembly also includes a connector (7) and a bushing (8); the lower part of the bushing (8) is fixedly connected to the connecting seat (3), and the upper part of the bushing (8) is fixedly connected to the connector (7). The bushing (8), the connector (7) and the connecting seat (3) are coaxially arranged. The connector (7) has a first air port (71) that communicates with the inner cavity of the bushing (8) through an axial passage. The outer wall of the bushing (8) has a second air port (81) that communicates with the inner cavity of the bushing (8). The upper end of the armature (6) passes through the connecting seat (3) and cooperates with the first air port (71). When the power is off, the upper end of the armature (6) blocks the first air port (71) under the action of the first spring (601) and the second spring (602).

5. The air distribution valve structure according to claim 4, characterized in that, The through hole (31) includes a first stepped hole (311) and a second stepped hole (312) arranged concentrically. The first stepped hole (311) is located above the second stepped hole (312), and the diameter of the first stepped hole (311) is smaller than that of the second stepped hole (312). The armature (6) is connected to the second stepped hole (312) for vertical movement. The upper end of the armature (6) is provided with a stepped protrusion that decreases in size from bottom to top. The stepped protrusion includes a first protrusion (63) at the bottom and a second protrusion (64) at the top. The first protrusion (63) is located inside the first stepped hole (311). The second protrusion (64) extends to the outside of the connecting seat (3) and cooperates with the first air port (71).

6. The air distribution valve structure according to claim 5, characterized in that, The upper end of the second protrusion (64) is provided with a barb structure, and a sealing gasket (9) is sleeved on the barb structure; when energized, the top surface of the sealing gasket (9) is sealed to the bottom end of the first air port (71).

7. The air distribution valve structure according to claim 4, characterized in that, A first limiting protrusion ring (72) is provided on the outer peripheral wall of the connector (7) along the circumferential direction; the upper part of the bushing (8) is welded and fixed to the lower part of the connector (7), and the upper end of the bushing (8) abuts against the bottom surface of the first limiting protrusion ring (72), and a first sealing ring (73) is also sleeved on the top surface of the first limiting protrusion ring (72).

8. The air distribution valve structure according to claim 4, characterized in that, A second limiting protrusion ring (32) is provided circumferentially on the outer peripheral wall of the connecting seat (3); the bottom surface of the second limiting protrusion ring (32) abuts against the top surface of the outer shell (1); the lower part of the bushing (8) is welded and fixed to the upper part of the connecting seat (3), and the lower end of the bushing (8) abuts against the top surface of the second limiting protrusion ring (32); a second sealing ring (82) is also sleeved on the top surface of the second limiting protrusion ring (32) outside the bushing (8).

9. The air distribution valve structure according to claim 1, characterized in that, The upper part of the sleeve (4) is welded and fixed to the lower part of the connecting seat (3); the lower part of the sleeve (4) is welded and fixed to the upper part of the magnetic conductor (5).

10. The air distribution valve structure according to claim 9, characterized in that, A radial protrusion ring (65) is provided circumferentially on the outer peripheral wall at the bottom of the armature (6) to increase the contact area between the armature (6) and the magnetic conductor (5).

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