Electromagnetic valve and gas valve

Abstract

This utility model belongs to the field of heating technology, specifically disclosing an electromagnetic valve and a gas valve. The electromagnetic valve includes an electromagnetic mechanism, a valve port holder, a first valve core, and a second valve core. The valve port holder is installed at the first end of the electromagnetic mechanism and has a circumferentially closed valve cavity. The two ends of the valve cavity are respectively provided with a first valve port and a second valve port, with the first valve port spaced between the second valve port and the electromagnetic mechanism. The first end of the first valve core is slidably inserted into the electromagnetic mechanism, and the second end has a first sealing cap. The first sealing cap is movably disposed between the electromagnetic mechanism and the first valve port and can open or close the first valve port. The first end of the second valve core is coaxial and slidably inserted into the first valve core, and the second end has a second sealing cap. The second sealing cap is movably disposed within the valve cavity and can open or close the second valve port. This utility model can improve the operational safety and reliability of the electromagnetic valve and the gas valve, and reduce operating costs.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a solenoid valve and a gas valve. Background Technology

[0002] Solenoid valves are a common type of valve used to control the opening and closing of channels and the flow rate of fluids in pipelines. They are widely used in gas-fired water heating equipment and are an essential core component of gas-fired water heating equipment.

[0003] To ensure the reliability of gas path sealing, the prior art provides a solenoid valve, which includes an electromagnetic mechanism, a first valve core movably inserted into the electromagnetic mechanism, and a second valve core movably inserted into the first valve core. A valve port is provided on the valve seat. The first valve core seals the valve port and the second valve core seals the outer periphery of the first valve core, thereby achieving a double seal on the valve port through the first and second valve cores, improving the reliability of sealing.

[0004] However, in the solenoid valves provided by the existing technology, the first sealing cap of the first valve core is spaced outside the second sealing cap of the second valve core, which makes the outer diameter of the sealing area of ​​the first sealing cap larger. This results in a larger pressure of gas acting on the first sealing cap, and a greater electromagnetic force required for the electromagnetic mechanism to drive the first sealing cap to open the valve port. Consequently, the voltage required for the first valve core to open the valve is higher, which increases the cost of using the solenoid valve and reduces its reliability. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a solenoid valve that can effectively solve the problem of high valve opening voltage required by existing solenoid valves with double sealing structure, thereby reducing the cost of solenoid valves and improving their reliability.

[0006] The second technical problem solved by this utility model is to provide a gas valve that can effectively solve the problems of high cost and low reliability caused by the high opening voltage required by existing gas valves.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A solenoid valve, comprising:

[0009] Electromagnetic mechanism;

[0010] A valve holder is installed at the first end of the electromagnetic mechanism. The valve holder has a circumferentially closed valve cavity. A first valve port and a second valve port are respectively provided at both ends of the valve cavity. The first valve port is spaced between the second valve port and the electromagnetic mechanism.

[0011] The first valve core has a first end that is slidably inserted into the electromagnetic mechanism and a second end that has a first sealing cap. The first sealing cap is movably disposed between the electromagnetic mechanism and the first valve port and can open or block the first valve port.

[0012] The second valve core has a first end that is coaxial and slidably inserted into the first valve core, and a second end that has a second sealing cap. The second sealing cap is movably disposed in the inner cavity of the valve and can open or block the second valve port.

[0013] The electromagnetic valve described in this utility model has the following advantages compared with the prior art: By setting a valve port holder with a first valve port, a second valve port, and a valve cavity, the valve cavity is circumferentially closed. The first sealing cap of the first valve core blocks the first valve port, and the second sealing cap of the second valve core blocks the second valve port, thereby achieving double sealing of the valve ports. Specifically, through the arrangement of the valve cavity, the first valve port is spaced between the electromagnetic mechanism and the second valve port, the first sealing cap is movably positioned between the first valve port and the electromagnetic mechanism, and the second valve core extends from the first valve port into the valve cavity and connects with the second sealing cap. It is understood that the outer diameter of the second valve core is smaller than the outer diameter of the second sealing cap, which helps to reduce the diameter of the first valve port, thereby reducing the force exerted on the first sealing cap. The gas pressure is controlled, thereby reducing the voltage required for the electromagnetic mechanism to drive the first valve core, thus improving the operational reliability of the solenoid valve and reducing its operating cost. Simultaneously, by setting a valve port holder, the machining accuracy of the first and second valve ports can be controlled through the processing of the valve port holder, ensuring the reliable fit between the first valve port and the first valve core, as well as the reliable fit between the second valve port and the second valve core. This also reduces the machining accuracy requirements of the valve seat that mates with the solenoid valve, thereby lowering the overall machining cost of the gas valve. Furthermore, in the event of faults such as incomplete sealing in the solenoid valve, replacement and repair of the valve port holder facilitates the replacement and maintenance of both the solenoid valve and the gas valve, reducing replacement and maintenance costs and improving the long-term performance of the solenoid valve.

[0014] In one embodiment, the maximum outer diameter of the second sealing cap is larger than the diameter of the first valve port;

[0015] And / or, the diameter of the first valve port is R1, the diameter of the second valve port is R2, and R1≤1.2R2.

[0016] In one embodiment, the valve holder has a vent cavity, which is at least partially located between the electromagnetic mechanism and the first valve port. The side of the valve holder has a side vent that communicates with the vent cavity. The first sealing cap is movably disposed in the vent cavity. When the first valve core opens the first valve port, the first valve port communicates with the vent cavity and the valve cavity.

[0017] In one embodiment, the valve holder includes a first frame and a second frame. The first frame is provided with the first valve port and the venting cavity, and the second frame is provided with the second valve port. The first frame and the second frame are detachably connected and surround the valve cavity. The first frame or the second frame is installed at the end of the electromagnetic mechanism.

[0018] In one embodiment, the first end of the first frame is connected to the electromagnetic mechanism. The first frame has an open cavity and a vent cavity separated by an inner and outer opening. The open cavity is set on the side away from the electromagnetic mechanism. The second frame is installed at the opening of the open cavity and surrounds the cavity wall of the open cavity to form the valve cavity. The first frame has the side vent.

[0019] In one embodiment, the first frame includes a first cylindrical section and a second cylindrical section. The first end of the first cylindrical section is connected to the electromagnetic mechanism and has the side vent provided on its side wall. The first end of the second cylindrical section is connected to the second end of the first cylindrical section, and the second end of the second cylindrical section extends toward the electromagnetic mechanism and has the first valve port provided on its side wall. The vent is formed between the first cylindrical section and the second cylindrical section, and the inner cavity of the second cylindrical section forms the open mouth.

[0020] In one embodiment, a mounting ring groove is provided at the second end of the first frame, the mounting ring groove being arranged around the opening of the open mouth, and the periphery of the second frame being mounted in the mounting ring groove.

[0021] In one embodiment, one of the peripheral groove wall of the mounting ring groove and the outer wall of the second frame is provided with a pressing protrusion, and the other presses against the pressing protrusion.

[0022] In one embodiment, the second frame includes a valve port cylinder and a mounting ring extending radially outward along the valve port cylinder. The mounting ring is connected to the first frame, and the axial length of the mounting ring is less than the axial length of the valve port cylinder. The inner hole of the valve port cylinder forms the second valve port.

[0023] In one embodiment, the first end of the second frame is connected to the electromagnetic mechanism, the second end of the second frame is provided with the second valve port, and the side of the second frame is provided with the side vent.

[0024] The first frame is inserted inside the second frame, and a frame sealing ring is provided between the end of the first frame away from the electromagnetic mechanism and the second frame. The venting cavity and the valve cavity are arranged side by side in the axial direction of the first valve core.

[0025] In one embodiment, the second frame is open at one end facing the electromagnetic mechanism, and the first frame is inserted into the second frame through the open end of the second frame and is engaged with the second frame.

[0026] In one embodiment, a hook portion is provided protruding on the side wall of the first frame, and multiple hook portions are provided at intervals along the circumference of the first frame;

[0027] The second frame has a communication port on its side wall that communicates with the ventilation cavity. Multiple communication ports are spaced apart along the circumference of the second frame. The hook portion engages with the side wall of the communication port facing the electromagnetic mechanism.

[0028] In one embodiment, the second frame includes a main cylinder and a valve port cylinder coaxially connected. The first end of the main cylinder is mounted on the electromagnetic mechanism, and the valve port cylinder is connected to the outer side of the second end of the main cylinder. The outer diameter of the main cylinder is larger than the outer diameter of the valve port cylinder. The valve port cylinder has a second valve port. The frame sealing ring is provided between the inner wall of the second end of the main cylinder and the first frame.

[0029] In one embodiment, the electromagnetic mechanism is provided with a fixed seat on the side facing the first sealing cap. The fixed seat has a base plate portion that abuts against the end of the electromagnetic mechanism and a cylindrical portion that surrounds the periphery of the base plate portion. One end of the valve holder is inserted into the cylindrical portion and abuts against the base plate portion.

[0030] The second technical problem mentioned above is solved by the following technical solution:

[0031] A gas valve, comprising:

[0032] The valve seat has an air inlet channel, a valve mounting chamber, and an air outlet channel connected in sequence, and the bottom of the valve mounting chamber is provided with an on / off valve port that connects to the air outlet channel;

[0033] As described above, in the solenoid valve, the electromagnetic mechanism is sealed and installed on the outside of the valve seat and the valve port bracket is inserted into the mounting valve cavity. The second valve port is directly opposite and connected to the on / off valve port. When the first sealing cap opens the first valve port, the air intake channel is connected to the first valve port.

[0034] A valve port sealing ring is sandwiched between the valve port bracket and the bottom of the mounting valve chamber, and the valve port sealing ring surrounds the outside of the on / off valve port and the second valve port.

[0035] Compared with the prior art, the gas valve described in this utility model has the following advantages: by adopting the above-mentioned solenoid valve, the voltage required for the gas valve to operate can be reduced, the safety and reliability of the gas valve can be improved, the overall maintenance and replacement cost of the gas valve can be reduced, and the user experience of the gas valve can be improved. Attached Figure Description

[0036] Figure 1 This is a cross-sectional view of the gas valve in the closed state provided in Embodiment 1 of this utility model;

[0037] Figure 2 This is a cross-sectional view of the gas valve in the open state provided in Embodiment 1 of this utility model;

[0038] Figure 3 for Figure 2 A magnified view of a section at point I;

[0039] Figure 4 A cross-sectional view of the solenoid valve provided in Embodiment 1 of this utility model;

[0040] Figure 5 for Figure 4 A magnified view of a section at point J;

[0041] Figure 6 for Figure 4 A magnified view of a section at point K;

[0042] Figure 7 This is a schematic diagram of the structure of the solenoid valve provided in Embodiment 1 of this utility model;

[0043] Figure 8 A schematic diagram showing the disassembled structure of the solenoid valve provided in Embodiment 1 of this utility model;

[0044] Figure 9 A schematic diagram showing the disassembled structure of the valve holder provided in Embodiment 1 of this utility model;

[0045] Figure 10 This is a cross-sectional view of the gas valve in the closed state according to Embodiment 2 of this utility model;

[0046] Figure 11 This is a cross-sectional view of the gas valve in the open state provided in Embodiment 2 of this utility model;

[0047] Figure 12 A cross-sectional view of the solenoid valve provided in Embodiment 2 of this utility model;

[0048] Figure 13 for Figure 12 A magnified view of a section at point L;

[0049] Figure 14This is a schematic diagram of the solenoid valve structure provided in Embodiment 2 of this utility model;

[0050] Figure 15 A schematic diagram showing the disassembled structure of the solenoid valve provided in Embodiment 2 of this utility model;

[0051] Figure 16 This is a schematic diagram of the structure of the first frame provided in Embodiment 2 of this utility model;

[0052] Figure 17 This is a schematic diagram of the structure of the second frame provided in Embodiment 2 of this utility model.

[0053] Label Explanation:

[0054] 100. Solenoid valve; 200. Valve seat; 201. Inlet passage; 202. Valve mounting chamber; 203. On / off valve port; 300. Valve port sealing ring; 301. Inner sealing ring; 302. Outer sealing ring; 303. Connecting ring; 400. Sealing ring.

[0055] 1. Electromagnetic mechanism; 11. Coil assembly; 12. Fixed iron core; 121. Groove portion; 13. Magnetic guide frame; 14. Magnetic guide plate; 141. Inner magnetic guide plate; 142. Outer magnetic guide plate; 1421. Collar portion; 15. Central sleeve; 16. First sealing ring; 17. Second sealing ring;

[0056] 2. Valve port frame; 21. First frame body; 211. First cylindrical section; 2111. Connecting port; 2112. Divider plate section; 212. Second cylindrical section; 213. Annular sealing section; 214. First valve port; 215. Vent chamber; 216. Hook section; 22. Second frame body; 221. Second valve port; 222. Valve port cylindrical section; 223. Mounting ring section; 224. Pressing protrusion ring; 225. Main cylindrical section; 226. Valve port sealing section; 23. Valve inner cavity; 24. Side vent; 25. Sealing ring groove; 26. Frame sealing ring;

[0057] 3. First valve core; 31. First moving shaft; 311. Annular groove; 312. Insertion protrusion; 313. Protrusion portion; 32. First sealing cap; 33. Mounting sleeve; 331. Main part of the cylinder; 332. Flared cylinder portion; 333. Insertion ring portion; 334. Snap ring portion; 34. First connecting seat; 341. Mounting cylinder portion; 342. Flange portion; 35. Valve core sealing ring;

[0058] 4. Second valve core; 41. Second moving shaft; 411. Insertion groove; 42. Second sealing cap; 43. Second connecting seat; 431. Seat main part; 432. Positioning ring part; 433. Abutment ring part;

[0059] 5. Fixed base; 51. Base plate; 52. Fixed ring; 53. Cylindrical section; 54. Limiting edge; 55. Limiting ring;

[0060] 6. First elastic element; 7. Second elastic element; 8. First buffer element; 9. Second buffer element. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] Example 1

[0066] This embodiment provides a gas valve that can reduce the voltage required for gas valve operation, reduce the cost of gas valve, and improve the safety and reliability of gas valve use.

[0067] like Figures 1 to 4As shown, in this embodiment, the gas valve includes a valve seat 200 and a solenoid valve 100. The valve seat 200 has an inlet channel 201, a mounting chamber 202, and an outlet channel connected sequentially. The bottom of the mounting chamber 202 has an on / off valve port 203 communicating with the outlet channel. The solenoid valve 100 is installed within the valve seat 200 and has a first state and a second state. When the solenoid valve 100 is in the first state, it blocks the on / off valve port 203, preventing the inlet channel 201 and the outlet channel from connecting, and the gas valve is in a closed state. When the solenoid valve 100 is in the second state, it opens the on / off valve port 203, connecting the inlet channel 201 and the outlet channel, and the gas valve is in an open state.

[0068] Specifically, the solenoid valve 100 includes an electromagnetic mechanism 1, a first valve core 3, a second valve core 4, and a valve port holder 2. The valve port holder 2 is mounted on the first end of the electromagnetic mechanism 1 and has a circumferentially closed valve cavity 23. A first valve port 214 and a second valve port 221 are respectively provided at both ends of the valve cavity 23, with the first valve port 214 spaced between the electromagnetic mechanism 1 and the second valve port 221. The first valve core 3 has its first end slidably inserted into the electromagnetic mechanism 1 and its second end having a first sealing cap 32. The first sealing cap 32 is movably disposed between the electromagnetic mechanism 1 and the first valve port 214 and can open or close the first valve port 214. The second valve core 4 has its first end slidably inserted into the first valve core 3 and its second end having a second sealing cap 42. The second sealing cap 42 is movably disposed within the valve cavity 23 and can open or close the second valve port 221.

[0069] The electromagnetic mechanism 1 is sealed and installed outside the valve seat 200, and the valve port bracket 2 is installed inside the installation valve cavity 202. A valve port sealing ring 300 is provided between the valve port bracket 2 and the bottom of the installation valve cavity 202. The valve port sealing ring 300 surrounds the outside of the second valve port 221 and the on / off valve port 203 so that the second valve port 221 and the on / off valve port 203 are sealed and connected. When the first sealing cap 32 blocks the first valve port 214 and the second sealing cap 42 blocks the second valve port 221, the solenoid valve 100 is in the first state, and the air intake channel 201 is not connected to the valve inner cavity 23, and the valve inner cavity 23 is not connected to the air outlet channel; when the first sealing cap 32 opens the first valve port 214 and the second sealing cap 42 opens the second valve port 221, the solenoid valve 100 is in the second state, and the mounting valve cavity 202 is connected to the valve inner cavity 23 through the first valve port 214, and the valve inner cavity 23 is connected to the air outlet channel through the second valve port 221, thereby making the air intake channel 201, mounting valve cavity 202, first valve port 214, valve inner cavity 23, second valve port 221, on / off valve port 203 and air outlet channel connected in sequence.

[0070] The solenoid valve 100 and gas valve provided in this embodiment achieve double sealing of the valve ports by setting a valve port frame 2 with a first valve port 214, a second valve port 221, and a valve inner cavity 23. The valve inner cavity 23 is circumferentially closed. The first sealing cap 32 of the first valve core 3 blocks the first valve port 214, and the second sealing cap 42 of the second valve core 4 blocks the second valve port 221. The first valve port 214 is spaced between the solenoid mechanism 1 and the second valve port 221, the first sealing cap 32 is movably disposed between the first valve port 214 and the solenoid mechanism 1, and the second sealing cap 42 is movably disposed within the valve inner cavity 23. It is understood that the outer diameter of the second valve core 4 is smaller than the outer diameter of the second sealing cap 42, which helps to reduce the diameter of the first valve port 214, thereby reducing the gas pressure acting on the first sealing cap 32. The pressure is reduced, thereby decreasing the voltage required for the electromagnetic mechanism 1 to drive the first valve core 3, thus improving the operational reliability of the solenoid valve 100 and reducing its operating cost. Simultaneously, by setting the valve port bracket 2, the machining accuracy of the first valve port 214 and the second valve port 221 can be controlled through the machining of the valve port bracket 2, ensuring the reliable fit between the first valve port 214 and the first valve core 3, and the reliable fit between the second valve port 221 and the second valve core 4. This also reduces the machining accuracy requirements for the valve seat 200, thereby reducing the overall machining cost of the gas valve. Furthermore, in the event of faults such as poor sealing in the solenoid valve 100, the replacement and repair of the solenoid valve 100 and the gas valve can be easily achieved through the replacement and repair of the valve port bracket 2, reducing the cost of replacement and maintenance of the solenoid valve 100 and the gas valve, and improving the long-term performance of the solenoid valve 100 and the gas valve.

[0071] When the electromagnetic mechanism 1 is energized, it applies electromagnetic forces along the first and second axes to the first valve core 3 and the second valve core 4. The solenoid valve 100 also includes a first elastic element 6 and a second elastic element 7. The first elastic element 6 acts on the first valve core 3 and applies an elastic force along the first axis, while the second elastic element 7 acts on the second valve core 4 and applies an elastic force along the first axis, with the first and second axes being opposite. This allows the solenoid valve 100 to return to and maintain its first state under the elastic forces of the first and second elastic elements 6 and 7 when the electromagnetic mechanism 1 is de-energized. When the electromagnetic mechanism 1 is energized, the electromagnetic force acting on the first valve core 3 overcomes the elastic force of the first elastic element 6, and the electromagnetic force acting on the second valve core 4 overcomes the elastic force of the second elastic element 7, thus switching the electromagnetic mechanism 1 to the second state.

[0072] In one embodiment, when the electromagnetic mechanism 1 is de-energized, the first valve core 3 blocks the first valve port 214 and the second valve core 4 blocks the second valve port 221, and the solenoid valve 100 is in a first state; when the electromagnetic mechanism 1 is energized, the first valve core 3 opens the first valve port 214 and the second valve core 4 opens the second valve port 221, and the solenoid valve 100 is in a second state. That is, the solenoid valve 100 is a normally closed solenoid valve, with the first axial direction driving the first sealing cap 32 away from the electromagnetic mechanism 1. When the electromagnetic mechanism 1 is energized, the first valve core 3 and the second valve core 4, driven by electromagnetic force, cause the first sealing cap 32 and the second sealing cap 42 to move closer to the electromagnetic mechanism 1 to open the first valve port 214 and the second valve port 221, resulting in higher reliability.

[0073] In other embodiments, when the electromagnetic mechanism 1 is de-energized, the first valve core 3 opens the first valve port 214 and the second valve core 4 opens the second valve port 221, and the electromagnetic valve 100 is in the first state; when the electromagnetic mechanism 1 is energized, the first valve core 3 closes the first valve port 214 and the second valve core 4 blocks the second valve port 221, and the electromagnetic valve 100 is in the second state, that is, the electromagnetic valve 100 is a normally open electromagnetic valve.

[0074] This utility model takes the solenoid valve 100 as a normally closed solenoid valve as an example to introduce the structure and working principle of the solenoid valve 100. However, it is understood that when the solenoid valve 100 is a normally closed solenoid valve 100, the structure of the solenoid valve 100 can be set with reference to the structure provided by this utility model. This utility model will not list them one by one.

[0075] The mounting chamber 202 extends through the valve seat 200 to form a mounting opening on the side away from the on / off valve port 203. The valve port bracket 2 can be installed in the mounting chamber 202 through the mounting opening, thereby improving the ease of installation of the solenoid valve 100 on the valve seat 200. To ensure installation sealing, a mounting sealing ring 400 is provided between the solenoid mechanism 1 and the valve seat 200. The mounting sealing ring 400 surrounds the mounting opening to seal the connection gap between the valve seat 200 and the solenoid valve 100, preventing gas leakage from the mounting position of the solenoid valve 100.

[0076] In one embodiment, the valve mounting cavity 202 is a cylindrical cavity, and the outer peripheral surface of the valve port holder 2 is a cylindrical surface. This helps to ensure the installation stability and reliability of the valve port holder 2 within the valve mounting cavity 202, and also helps to ensure sealing performance.

[0077] In one embodiment, the end of the valve holder 2 away from the electromagnetic mechanism 1 is interference-fitted with the mounting valve cavity 202, which helps to prevent gas from entering between the valve holder 2 and the bottom of the mounting valve cavity 202 through the gap between the outer peripheral wall of the valve holder 2 and the circumferential side wall of the mounting valve cavity 202, thereby improving the reliability of the seal.

[0078] The electromagnetic mechanism 1 includes a coil assembly 11, a central sleeve 15, a fixed iron core 12, and a magnetic conductive assembly. The coil assembly 11 includes a coil support with a central through hole, a coil wound on the coil support, and a plastic-encapsulated shell surrounding the coil and the coil support. The magnetic conductive assembly surrounds the outside of the coil assembly 11, and its first side has a through hole communicating with the central through hole. The central sleeve 15 is inserted into the central through hole, the fixed iron core 12 is installed in the central sleeve 15, and the end of the fixed iron core 12 away from the through hole is fixed to the second end of the magnetic conductive assembly. The first end of the first valve core 3 is slidably inserted into the central sleeve 15 and arranged axially alongside the fixed iron core 12.

[0079] like Figures 4 to 6 As shown, in one embodiment, the magnetically conductive assembly includes a magnetically conductive frame 13 and a magnetically conductive plate 14. The magnetically conductive frame 13 includes a magnetically conductive base plate and magnetically conductive side plates connected to opposite sides of the base plate. The base plate is mounted on the end of the coil assembly 11 away from the first sealing cap 32. The magnetically conductive plate 14 is connected to the ends of the two magnetically conductive side plates away from the base plate, so that the coil assembly 11 is sandwiched between the base plate and the plate 14. A through hole is provided in the plate 14. In other embodiments, the base plate may be located on the side of the coil assembly 11 facing the first sealing cap 32, and the plate 14 may be mounted on the side of the coil assembly 11 away from the valve holder 2.

[0080] In one embodiment, the magnetic plate 14 includes a magnetic inner plate 141 and a magnetic outer plate 142. The magnetic inner plate 141 is sandwiched between the magnetic outer plate 142 and the coil assembly 11. The magnetic inner plate 141 is provided with an inner through hole that is directly opposite to the central through hole. The magnetic outer plate 142 is provided with an outer through hole that is directly opposite to and communicates with the central through hole. The inner through hole and the outer through hole communicate with each other to form a through hole. The periphery of the outer perforation is folded away from the magnetic inner plate 141 to form a collar portion 1421. The magnetic inner plate 141 and the magnetic outer plate 142 form an annular groove. The end of the central sleeve 15 away from the fixed iron core 12 extends into the annular groove and abuts against the collar portion 1421. A first sealing ring 16 is provided in the annular groove. The first sealing ring 16 is interference-fitted on the outside of the central sleeve 15 and abuts against both the magnetic inner plate 141 and the magnetic outer plate 142 to seal the assembly gap between the magnetic inner plate 141, the magnetic outer plate 142 and the central sleeve 15.

[0081] In other embodiments, the magnetic plate 14 may be provided with only a plate-shaped structure, and the central sleeve 15 includes a cylinder inserted into the central through hole, with the end of the cylinder near the valve port frame 2 folded outward to form a fixed plate portion, and the valve port frame 2 cooperates with the fixed plate portion.

[0082] The first end of the central sleeve 15, away from the first sealing cap 32, is fitted onto the outside of the fixed iron core 12 and its end abuts against the magnetically conductive base plate to achieve the installation and positioning of the central sleeve 15 within the electromagnetic assembly. An annular groove is formed on the outside of the fixed iron core 12, and a second sealing ring 17 is provided in the annular groove. The second sealing ring 17 abuts against the central sleeve 15 to seal the gap between the fixed iron core 12 and the central sleeve 15.

[0083] It is worth noting that in this utility model, the specific structure of the magnetic conductive component, the fixed iron core 12 and the coil component 11 and their mutual cooperation structure can be set with reference to the prior art. This is not the focus of this utility model, and this utility model does not limit or elaborate on it.

[0084] In one embodiment, the solenoid valve 100 includes a fixed seat 5, which is mounted on the first end of the solenoid mechanism 1 and surrounds the outer side of the first valve core 3. The valve port bracket 2 is mounted on the fixed seat 5. This facilitates the matching of the valve port bracket 2 and the fixed seat 5 through machining of the fixed seat 5, thereby reducing the overall cost of the solenoid valve 100 and improving the ease of replacement and maintenance of the fixed seat 5. In other embodiments, the central sleeve 15 includes a cylinder inserted inside the coil assembly 11. The cylinder extends out of the magnetic guide plate 14 on the side facing the first sealing cap 32 and extends radially to form a seat portion. The valve port bracket 2 is mounted on the seat portion.

[0085] To improve the ease of installation of the fixing seat 5 on the electromagnetic mechanism 1, the fixing seat 5 has a fixing ring portion 52 surrounding the sleeve portion 1421. The fixing ring portion 52 is interference-fitted onto the outside of the mounting ring portion 223 to achieve coaxial arrangement of the fixing seat 5 and the mounting ring portion 223, thereby facilitating coaxial arrangement of the fixing seat 5 and the first valve core 3. Specifically, the fixing seat 5 includes a base plate portion 51 attached to the outside of the magnetic guide plate 14. The base plate portion 51 has a through hole for the mounting ring portion 223 to pass through, and the edge of the through hole is folded to form the fixing ring portion 52. The fixing ring portion 52 is preferably a conical ring structure, and the small end of the fixing ring portion 52 faces the first sealing cap 32, thereby facilitating a tight fit between the fixing ring portion 52 and the mounting ring portion 223 and preventing the fixing seat 5 from loosening relative to the mounting ring portion 223.

[0086] The first elastic element 6 is sleeved on the outside of the first valve core 3, with its two ends abutting against the fixed seat 5 and the first sealing cap 32, respectively. In one embodiment, the fixed seat 5 is partially provided with a limiting ring portion 55 protruding in the direction away from the electromagnetic mechanism 1. The limiting ring portion 55 is coaxially arranged with the first valve core 3. The first elastic element 6 is sleeved on the inner side of the limiting ring portion 55 and abuts against the inner sidewall of the limiting ring portion 55, so as to realize the installation and positioning of the first elastic element 6 on the fixed seat 5, which helps to ensure the coaxial arrangement of the first elastic element 6 and the first valve core 3, thereby ensuring the balance of the force exerted by the first elastic element 6 on the first valve core 3. The cross-sectional area of ​​the limiting ring portion 55 is preferably trapezoidal, with the small end of the trapezoid facing the first sealing cap 32, so as to limit the radial sway of the first elastic element 6 while avoiding the setting of the limiting ring portion 55 affecting the deformation of the first elastic element 6.

[0087] In other embodiments, the first end of the first elastic member 6 may be sleeved on the outside of the fixing ring portion 52.

[0088] In one embodiment, the first valve core 3 includes a first moving shaft 31 and a mounting sleeve 33. The first moving shaft 31 is slidably inserted inside the electromagnetic mechanism 1. The first end of the mounting sleeve 33 is coaxially connected to the first moving shaft 31, and the second end of the mounting sleeve 33 is located outside the electromagnetic mechanism 1 and coaxially connected to the first sealing cap 32. The second valve core 4 also includes a second moving shaft 41. The first end of the second moving shaft 41 is coaxial and slidably inserted inside the mounting sleeve 33, and the second end of the second moving shaft 41 is coaxially connected to the second sealing cap 42. The first moving shaft 31 and the second moving shaft 41 are arranged side by side in the axial direction. This arrangement can shorten the length of the first moving shaft 31 and reduce the processing difficulty of the first moving shaft 31.

[0089] In another embodiment, the first valve core 3 includes a first moving shaft 31, the first end of which is slidably inserted into the electromagnetic mechanism 1, and the second end of which extends out of the electromagnetic mechanism 1 and is coaxially connected to the first sealing cap 32. The first end of the second valve core 4 is slidably inserted into the first moving shaft 31. In yet another embodiment, the first valve core 3 includes a first moving shaft 31 and a mounting sleeve 33, the first end of which is slidably inserted into the electromagnetic mechanism 1, the first end of which is coaxially connected to the first moving shaft 31 and the second end of which is coaxially connected to the first sealing cap 32, and the second valve core 4 is partially slidably inserted into the first moving shaft 31 and partially slidably inserted into the mounting sleeve 33.

[0090] To enhance the force exerted by the electromagnetic mechanism 1 on the first valve core 3, one of the fixed iron core 12 and the first moving shaft 31 has a groove 121, and the other has a protrusion 313, which is inserted into the groove 121. When the electromagnetic mechanism 1 is in the second state, the protrusion 313 abuts against the bottom of the groove 121 to limit the stroke of the first valve core 3 in the direction toward the fixed iron core 12. By providing the protrusion 313 and the groove 121, the mating area between the fixed iron core 12 and the first moving shaft 31 can be increased, thereby enhancing the electromagnetic force acting on the first valve core 3; at the same time, the provision of the protrusion 313 and the groove 121 also helps to guide the movement of the first valve core 3, thereby improving the stability and reliability of the movement of the first valve core 3.

[0091] In one embodiment, one end of the mounting sleeve 33 is fitted onto the outside of the first moving shaft 31, thereby making the mounting sleeve 33 an open structure at both ends, reducing the processing difficulty of the mounting sleeve 33. In other embodiments, the second end of the first moving shaft 31 may have a mounting groove, and the first end of the mounting sleeve 33 may be closed and inserted into the mounting groove.

[0092] An annular groove 311 is provided on the first moving shaft 31. The first end of the mounting sleeve 33 is folded inward to form a retaining ring 334, which is engaged in the annular groove 311 to restrict the relative axial movement of the mounting sleeve 33 and the first moving shaft 31, ensuring the stability and reliability of their assembly. A valve core sealing ring 35 is provided between the first moving shaft 31 and the mounting sleeve 33 to seal the assembly gap between the first moving shaft 31 and the mounting shaft, preventing gas leakage. Furthermore, a sealing groove is provided on the outer wall of the first moving shaft 31, and the valve core sealing ring 35 is installed in the sealing ring groove 25.

[0093] To improve the ease of connection between the first sealing cap 32 and the mounting sleeve 33, the mounting sleeve 33 includes a main cylinder 331 sleeved on the first moving shaft 31. The first end of the main cylinder 331 is provided with a retaining ring 334, and the second end of the main cylinder 331 is flared to form a flared cylinder 332. The first sealing cap 32 is interference-fitted onto the flared cylinder 332. Thus, by flaring the flared cylinder 332 relative to the main cylinder 225, the size of the flared cylinder 332 is increased while the size of the main cylinder 225 remains unchanged, thereby increasing the inner diameter of the first sealing cap 32. This avoids interference between the first sealing cap 32 and the second valve core 4, and improves the ease of installation of the first sealing cap 32. Furthermore, a limiting slot is provided on the inner wall of the first sealing cap 32, and the end of the flared cylindrical part 332 away from the main cylindrical part 225 is folded outward to form an insert ring part 333. The insert ring part 333 is inserted into the limiting slot to prevent the first sealing cap 32 from coming out of the mounting sleeve 33.

[0094] In one embodiment, the first valve core 3 further includes a first connecting seat 34, which is mounted on the side of the first sealing cap 32 facing the electromagnetic mechanism 1, and the end of the first elastic member 6 away from the electromagnetic mechanism 1 abuts against the first connecting seat 34. By providing the first connecting seat 34, the problem of the first elastic member 6 scraping against the first sealing cap 32, thereby preventing deformation and damage to the first sealing cap 32, can be avoided, improving the operational stability and reliability of the first valve core 3 and enhancing its long-term performance. In other embodiments, the end of the first elastic member 6 away from the electromagnetic mechanism 1 can directly abut against the first sealing cap 32.

[0095] In one embodiment, the first connecting seat 34 has a flange portion 342. In a projection plane perpendicular to the axis of the first valve core 3, the orthographic projection of the flange portion 342 is located outside the orthographic projection of the first sealing cap 32. The end of the first elastic member 6 away from the electromagnetic mechanism 1 abuts against the flange portion 342. This arrangement can avoid the problem of insufficient installation space for the first elastic member 6 due to the small distance between the first sealing cap 32 and the electromagnetic mechanism 1, ensuring that the installation size of the first elastic member 6 meets the elastic force requirements and improving the installation convenience of the first elastic member 6.

[0096] Specifically, the first connecting seat 34 includes a mounting cylinder 341, which is sleeved on the outside of the first sealing cap 32. The bottom of the mounting cylinder 341 is connected to the side of the first sealing cap 32 facing the electromagnetic mechanism 1. The inner wall of the mounting cylinder 341 is in close contact with the outer wall of the first sealing cap 32 to ensure the connection stability between the first connecting seat 34 and the first sealing cap 32. A flange 342 extends outward from the end of the mounting cylinder 341 facing the first valve port 214.

[0097] In other embodiments, the first connecting seat 34 may also be a plate-shaped structure, and the first connecting seat 34 is only disposed at the end of the first sealing cap 32 facing the electromagnetic mechanism 1.

[0098] One of the first moving shaft 31 and the second moving shaft 41 has a insertion groove 411, and the other has an insertion protrusion 312. The insertion protrusion 312 is inserted into the insertion groove 411, which improves the sliding reliability of the second moving shaft 41 and increases the electromagnetic force applied to the second moving shaft 41 by the electromagnetic mechanism 1 through the first moving shaft 31. When the solenoid valve 100 is in the second state, the insertion protrusion 312 abuts against the bottom of the insertion groove 411, thereby limiting the stroke of the second moving shaft 41 in the direction toward the fixed iron core 12. The abutment between the insertion protrusion 312 and the bottom of the insertion groove 411 achieves the limiting of the second moving shaft 41, which can reduce the contact area between the two and thus facilitate the control of the limiting accuracy through precision machining.

[0099] In one embodiment, the second sealing cap 42 includes a main sealing portion. An adjusting portion protrudes from the side of the main sealing portion away from the electromagnetic mechanism 1. The outer diameter of the main sealing portion is larger than the diameter of the second valve port 221, and the outer diameter of the adjusting portion is smaller than the diameter of the second valve port 221. The cross-sectional area of ​​the adjusting portion gradually increases in the direction towards the electromagnetic mechanism 1. When the second valve core 4 blocks the second valve port 221, the adjusting portion is inserted into the second valve port 221, and the main sealing portion abuts against the end of the second valve port 221 to block the second valve port 221. By providing the adjusting portion, the opening degree of the second valve port 221 can be controlled by the second sealing cap 42, thereby regulating the flow rate of the gas exiting the second valve port 221.

[0100] It is worth noting that the above-mentioned structures of the second sealing cap 42 are all exemplary structures. Existing structures of sealing caps that can realize the opening and closing of the second valve port 221 and the opening degree adjustment can all be applied to this utility model. This utility model does not further limit or elaborate on the structure of the second sealing cap 42 and the connection structure between the second sealing cap 42 and the second moving shaft 41.

[0101] In one embodiment, the second elastic member 7 is sleeved on the outside of the second moving shaft 41, and the first end of the second elastic member 7 abuts against the stepped surface of the mounting sleeve 33, while the second end of the second elastic member 7 presses against the second sealing cap 42. Specifically, the first end of the second elastic member 7 abuts against the bottom of the flared cylindrical portion 332, thereby allowing the flared space of the flared cylindrical portion 332 relative to the main cylindrical portion 225 to accommodate the second elastic member 7, improving the ease of installation of the second elastic member 7; at the same time, this arrangement of the second elastic member 7 allows the second elastic member 7 to adopt a relatively large size, thereby ensuring the elastic force of the second elastic member 7 and improving the ease of disassembly and assembly of the second elastic member 7.

[0102] In another embodiment, the second elastic member 7 may also be disposed between the first moving shaft 31 and the second moving shaft 41. In yet another embodiment, the second elastic member 7 may also be disposed in the valve cavity 23, with the first end of the second elastic member 7 abutting against the side wall of the valve cavity 23 facing the electromagnetic mechanism 1, and the second end of the second elastic member 7 pressing against the second sealing cap 42.

[0103] In one embodiment, the second valve core 4 further includes a second connecting seat 43, which is connected to the side of the second sealing cap 42 facing the electromagnetic mechanism 1, and the second end of the second elastic member 7 abuts against the second connecting seat 43. This avoids damage to the second sealing cap 42 caused by the second elastic member 7 directly abutting against the second sealing cap 42, thereby improving the long-term performance of the second valve core 4.

[0104] The second connecting seat 43 includes a main seat portion 431 sleeved on the second sealing cap 42. A positioning ring portion 432 protrudes from the main seat portion 431 in the direction toward the electromagnetic mechanism 1. The positioning ring portion 432 is coaxial with and spaced apart from the second moving shaft 41. The second end of the second elastic member 7 is sleeved on the outside of the positioning ring portion 432 and connected to it, thus limiting the displacement of the second end of the second elastic member 7. However, it is understood that the second connecting seat 43 can also adopt other forms of spring seat structures in the prior art. This utility model does not limit the specific structure of the second connecting seat 43.

[0105] like Figure 3 , Figures 6 to 9 As shown, in one embodiment, the valve holder 2 has a vent chamber 215, which is at least partially located between the electromagnetic mechanism 1 and the first valve port 214. A side vent 24 communicating with the vent chamber 215 is provided on the side of the valve holder 2. A first sealing cap 32 is movably disposed within the vent chamber 215. When the first sealing cap 32 opens the first valve port 214, the vent chamber 215 communicates with the valve inner cavity 23 through the first valve port 214. The side vent 24 connects the mounting valve cavity 202 and the vent chamber 215, allowing the gas entering the intake channel 201 to enter the vent chamber 215 through the side vent 24. That is, when both the first valve port 214 and the second valve port 221 are open, the gas in the intake channel 201 sequentially enters the outlet channel through the vent chamber 215, the first valve port 214, the valve inner cavity 23, and the second valve port 221.

[0106] In one embodiment, multiple side vents 24 are provided at intervals along the circumference of the valve holder 2, which reduces the installation difficulty of the valve holder 2 in the installation valve cavity 202, helps to ensure that the side vents 24 are directly opposite the air inlet channel 201, and also increases the position of the gas entering the ventilation cavity 215 from the installation valve cavity 202, thereby ensuring the airflow and smoothness of the gas entering the ventilation cavity 215, and improving the uniformity of the gas in the ventilation cavity 215 in the circumference of the valve holder 2.

[0107] To improve the installation stability and reliability of the valve holder 2, in one embodiment, the fixing seat 5 has a cylindrical part 53 coaxially arranged with the first valve core 3. The end of the valve holder 2 facing the electromagnetic mechanism 1 is inserted and assembled with the cylindrical part 53 and abuts against the base plate part 51. This ensures the coaxiality of the valve holder 2 and the fixing seat 5, thereby ensuring the coaxiality of the valve holder 2 and the first valve core 3, and realizing the installation and positioning of the valve holder 2 at the electromagnetic mechanism 1.

[0108] The end of the cylindrical portion 53 away from the electromagnetic mechanism 1 is folded inward to form a limiting edge 54. Multiple limiting edges 54 are provided at intervals along the circumference of the cylindrical portion 53. The limiting edge 54 abuts against the side edge of the side vent 24 facing the electromagnetic mechanism 1, so that the valve port frame 2 is partially clamped between the limiting edge 54 and the base plate portion 51, thereby restricting the valve port frame 2 from moving axially relative to the fixed seat 5, thus ensuring the assembly stability and reliability of the valve port frame 2 and the fixed seat 5.

[0109] In other embodiments, a locking protrusion can be provided on one of the cylindrical portion 53 and the valve port bracket 2, and a locking groove can be provided on the other, with the locking protrusion engaging with the locking groove to achieve the cooperation between the fixing seat 5 and the valve port bracket 2. In another embodiment, the cylindrical portion 53 and the valve port bracket 2 can also be connected by other detachable methods such as spiral screw connection, riveting, or screw connection.

[0110] In one embodiment, the end of the limiting edge 54 away from the cylindrical part 53 is folded along the side facing the electromagnetic mechanism 1 to form a stop part. The stop part abuts against the inner wall of the venting cavity 215, which can further improve the assembly stability and reliability of the valve port bracket 2 on the fixed seat 5 and reduce the probability of the valve port bracket 2 coming loose from the fixed seat 5.

[0111] The valve holder 2 includes a first frame 21 and a second frame 22. The first frame 21 is provided with a first valve port 214 and a venting chamber 215, and the second frame 22 is provided with a second valve port 221. The first frame 21 and the second frame 22 are detachably connected and surround to form a valve cavity 23. The first frame 21 or the second frame 22 is installed at the end of the electromagnetic mechanism 1.

[0112] By setting a first valve port 214 on the first frame 21 and a second valve port 221 on the second frame 22, the first frame 21 and the second frame 22 are detachably connected. The second sealing cap 42 and the second elastic element 7 located inside the valve cavity 23 can be disassembled and assembled through the disassembly and assembly of the first frame 21 and the second frame 22, thereby improving the overall disassembly and assembly performance of the solenoid valve 100. At the same time, setting the first valve port 214 and the second valve port 221 on the first frame 21 and the second frame 22 respectively also helps to ensure the machining accuracy of the first valve port 214 and the second valve port 221, and facilitates the machining, replacement and maintenance of the first frame 21 and the second frame 22 respectively, thereby reducing the convenience of disassembly, replacement and maintenance of the valve port frame 2.

[0113] In one embodiment, the maximum outer diameter of the second sealing cap 42 is larger than the diameter of the first valve port 214, thereby reducing the diameter of the first valve port 214 and making it closer to the second valve port 221. This further facilitates reducing the voltage supplied when the electromagnetic mechanism 1 drives the first valve core 3. In one embodiment, the diameter of the first valve port 214 is R1, and the diameter of the second valve port 221 is R2, where R1 ≤ 1.2R2.

[0114] In one embodiment, the first end of the first frame 21 is connected to the electromagnetic mechanism 1. The first frame 21 has an open cavity and a venting cavity 215 separated by an inner and outer opening. The open cavity is located on the side away from the electromagnetic mechanism 1. The second frame 22 is installed at the opening of the open cavity and forms a valve cavity 23 with the cavity wall of the open cavity. The first frame 21 has a side vent 24. This configuration can reduce the size of the second frame 22 and reduce the processing difficulty of the second frame 22.

[0115] In one embodiment, the first frame 21 includes a first cylindrical portion 211 and a second cylindrical portion 212. The first end of the first cylindrical portion 211 is connected to the electromagnetic mechanism 1 and has a side vent 24 on its side wall. The first end of the second cylindrical portion 212 is connected to the second end of the first cylindrical portion 211, and the second end of the second cylindrical portion 212 extends towards the electromagnetic mechanism 1 and has a first valve port 214. A venting cavity 215 is formed between the first cylindrical portion 211 and the second cylindrical portion 212, and the inner cavity of the second cylindrical portion 212 forms an open cavity. This arrangement increases the circumferential dimension of the venting cavity 215 of the first valve core 3, thereby facilitating an increase in the axial dimension of the side vent 24 of the first valve core 3, and improving the smoothness of the gas flow from the intake channel 201 through the side vent 24 into the venting cavity 215.

[0116] In one embodiment, the second end of the second cylindrical portion 212 protrudes with an annular sealing portion 213 in the direction toward the electromagnetic mechanism 1. The annular sealing portion 213 surrounds the first valve port 214, and the end face of the annular sealing portion 213 facing the electromagnetic mechanism 1 is an arc surface, which can abut or separate from the first sealing cap 32. By providing an arc surface, the sealing reliability of the first sealing cap 32 to the first valve port 214 can be enhanced. In other embodiments, the annular sealing portion 213 may protrude from the first sealing cap 32 in the direction toward the valve cavity 23, and the annular sealing portion 213 abuts against the end of the second cylindrical portion 212 to seal the first valve port 214.

[0117] To improve the ease and reliability of installing the second frame 22, a mounting annular groove is provided at the second end of the first frame 21. The mounting annular groove surrounds the opening of the valve port cavity, and the periphery of the second frame 22 is installed within the mounting annular groove. Specifically, the periphery of the second frame 22 is installed within a positioning annular groove and abuts against the bottom and peripheral walls of the groove, thereby achieving the installation and positioning of the second frame 22 on the first frame 21, improving the assembly efficiency of the valve port frame 2, and enhancing the stability of the assembled valve port frame 2. Specifically, a mounting annular groove is provided at the second end of the first cylindrical portion 211.

[0118] The second frame 22 includes a valve port cylinder portion 222 and a mounting ring portion 223 extending radially outward along the valve port cylinder portion 222. The mounting ring portion 223 is connected to the first frame 21. The axial length of the mounting ring portion 223 is less than the axial length of the valve port cylinder portion 222. The inner hole of the valve port cylinder portion 222 forms the second valve port 221. This increases the opening length of the second valve port 221 while reducing the size of the second frame 22, thus reducing the processing cost of the second frame 22. Specifically, the mounting ring portion 223 is installed in a mounting ring groove.

[0119] One of the peripheral groove walls of the mounting ring groove and the outer wall of the second frame 22 is provided with a protruding pressing protrusion 224, and the other abuts against the pressing protrusion 224. This protrusion 224, through its design, better ensures the installation stability and reliability of the second frame 22 within the mounting ring groove. In one embodiment, the outer wall of the mounting ring 223 is provided with a protruding protrusion to reduce the processing difficulty of the first frame 21. In other embodiments, the groove wall of the mounting ring groove may also be provided with a protruding positioning ring 432.

[0120] The end of the first frame 21 away from the electromagnetic mechanism 1 and the second frame 22 form a sealing ring groove 25. The valve port sealing ring 300 is installed in the sealing ring groove 25 to improve the installation convenience of the valve port sealing ring 300. In one embodiment, the valve port sealing ring 300 includes an inner sealing ring 301 spaced around an outer sealing ring 302 disposed around the inner sealing ring 301. The inner sealing ring 301 is sandwiched between the bottom of the mounting valve cavity 202 and the second frame 22, and the outer sealing ring 302 is sandwiched between the first frame 21 and the bottom of the mounting valve cavity 202. In the projection plane perpendicular to the axial direction of the first valve core 3, the connection position of the first frame 21 and the second frame 22 is located between the inner sealing ring 301 and the outer sealing ring 302. This can prevent the gas in the intake channel 201 from entering the valve cavity 23 through the connection gap between the first frame 21 and the second frame 22, and can also prevent the gas in the valve cavity 23 from entering the on / off valve port 203 through the gap between the first frame 21 and the second frame 22.

[0121] In other embodiments, a valve port sealing ring 300 may be provided between the bottom of the second frame 22 and the mounting valve chamber 202, and a sealing structure may be provided between the first frame 21 and the second frame 22 to seal the connection gap between them.

[0122] In one embodiment, the valve port sealing ring 300 further includes a connecting ring 303 connected between the inner sealing ring 301 and the outer sealing ring 302, thereby making the valve port sealing ring 300 part an integrally machined component, thereby reducing the assembly difficulty of the solenoid valve 100, avoiding relative movement between the inner sealing ring 301 and the outer sealing ring 302, and simplifying the structure of the sealing ring groove 25.

[0123] Specifically, the end of the valve port cylinder 222 away from the electromagnetic mechanism 1 protrudes from the fixing ring 52, and the inner sealing ring 301 is sandwiched between the fixing ring 52 and the bottom of the mounting valve cavity 202, so that the valve port cylinder 222 can stop the valve port sealing ring 300 from moving.

[0124] In other embodiments, the inner sealing ring 301 and the outer sealing ring 302 can be separately provided, and the sealing ring groove 25 is coaxial and has two spaced apart, with the inner sealing ring 301 and the outer sealing ring 302 respectively installed in the sealing ring groove 25.

[0125] In one embodiment, the end of the valve port cylinder 222 facing the electromagnetic mechanism 1 has an arc structure, which protrudes in the direction towards the electromagnetic mechanism 1 and can abut or separate from the second sealing cap 42. By setting the arc structure, the sealing reliability of the second sealing cap 42 on the second valve port 221 is enhanced.

[0126] This embodiment also provides a gas-fired water heater, including the aforementioned gas valve. The gas-fired water heater provided in this embodiment, by employing the aforementioned gas valve, can improve the operational safety and reliability of the gas-fired water heater.

[0127] Example 2

[0128] This embodiment provides a solenoid valve 100 and a gas valve including the solenoid valve 100. The basic structure of the solenoid valve 100 provided in this embodiment is the same as that in the above embodiments, with only some differences in the settings. This embodiment will not repeat the same content as the above embodiments.

[0129] like Figures 10 to 13 As shown, in this embodiment, a groove 121 is provided on the fixed iron core 12, a protrusion 313 is provided on the first moving shaft 31, and a first buffer 8 is provided at the bottom of the positioning groove. When the solenoid valve 100 is in the second state, the positioning protrusion abuts against the first buffer 8 to buffer the impact when the first valve core 3 opens, reduce the noise when the solenoid valve 100 opens, and improve the user experience of the solenoid valve 100.

[0130] The first moving shaft 31 has a protruding insertion protrusion 312 at the end away from the fixed iron core 12, and the second moving shaft 41 has an insertion groove 411 at the end facing the first moving shaft 31. A second buffer member 9 is provided at the bottom of the insertion groove 411. When the solenoid valve 100 is in the second state, the insertion protrusion is inserted into the insertion groove 411 and abuts against the second buffer member 9.

[0131] In this embodiment, the first end of the second frame 22 is mounted on the fixed base 5, and the second end of the second frame 22 is provided with a second valve port 221. A side vent 24 is provided on the side of the second frame 22. The first frame 21 is inserted into the second frame 22 and is detachably connected to the second frame 22. A frame sealing ring 26 is provided between the end of the second frame 22 away from the electromagnetic mechanism 1 and the first frame 21 to seal the gap at the connection between the first frame 21 and the second frame 22. The first frame 21 and the second frame 22 surround and form a valve cavity 23. The valve port sealing ring 300 is sandwiched between the second frame 22 and the bottom of the valve mounting cavity 202.

[0132] The valve holder 2 provided in this embodiment can reduce the difficulty of setting the valve port sealing ring 300, thereby reducing the assembly difficulty of the valve holder 2 in the installation valve cavity 202. At the same time, this setting can ensure the reliable installation of the valve holder 2 in the installation valve cavity 202 without the need for the outer wall of the valve holder 2 to abut against the peripheral cavity wall of the installation valve cavity 202. This can avoid the valve holder 2 being squeezed by the cavity wall of the installation valve cavity 202, thereby avoiding the problem that the valve holder 2 is squeezed and deformed, which would affect the structural stability and reliability of the first valve port 214 and the second valve port 221, and ensuring the reliability of the valve holder 2 in use.

[0133] In this embodiment, the circumferential sidewall of the valve port frame 2 is spaced apart from the cavity wall of the valve mounting cavity 202 to avoid the cavity wall of the valve mounting cavity 202 causing lateral compression to the valve port frame 2, thereby avoiding the problem of reduced accuracy of the first valve port 214 and the second valve port 221 due to deformation of the valve port frame 2.

[0134] like Figures 13 to 17 As shown, to improve the assembly stability and reliability of the valve holder 2, the second holder 22 is open on the side facing the electromagnetic mechanism 1, and the first holder 21 is inserted into the second holder 22 from the open end of the second holder 22. The first holder 21 has a venting cavity 215 and a connecting port 2111 on its side. The connecting port 2111 connects the side venting port 24 and the venting cavity 215. The venting cavity 215 and the valve inner cavity 23 are spaced apart in the axial direction of the first valve core 3. The first holder 21 is sandwiched between the holder sealing ring 26 and the fixing seat 5 to ensure the stability of the first holder 21 inside the second holder 22.

[0135] In this embodiment, the first frame 21 and the second frame 22 are snapped together to improve the ease of assembly and disassembly and the stability of the first frame 21 and the second frame 22. Furthermore, the outer side wall of the first frame 21 is provided with a hook portion 216, which is snapped onto the second frame 22, thus realizing the snapping of the first frame 21 and the second frame 22.

[0136] In this embodiment, the hook portion 216 engages with the side edge of the side vent 24 facing the electromagnetic mechanism 1, thereby simplifying the structure of the second frame 22 and reducing the processing difficulty of the second frame 22. In other embodiments, a slot can also be separately provided on the second frame 22, and the hook portion 216 can be engaged in the slot.

[0137] Multiple side vents 24 are spaced apart circumferentially along the second frame 22 to ensure airflow and reduce the assembly difficulty of the valve holder 2 within the valve mounting cavity 202. The second frame 22 forms an outer slat between two adjacent side vents 24. Hooks 216 are provided one-to-one with the connecting ports 2111 to ensure the assembly stability and reliability of the first frame 21 inside the second frame 22.

[0138] Furthermore, multiple connecting ports 2111 are provided at intervals along the circumference of the first frame 21, and the first frame 21 forms a partition plate portion 2112 between two adjacent connecting ports 2111, and each partition plate portion 2112 is provided with a hook portion 216.

[0139] The first frame 21 includes a first cylindrical section 211 and a second cylindrical section 212. The first cylindrical section 211 is open at both ends and inserted into the second frame 22. The outer wall of the first cylindrical section 211 is provided with a hook portion 216. The first end of the second cylindrical section 212 is open and connected to the second end of the first cylindrical section 211. The second end of the second cylindrical section 212 extends in a direction toward the first cylindrical section 211 and has a first valve port 214. The outer wall of the second cylindrical section 212 is connected to the inner wall of the first cylindrical section 211. A venting cavity 215 is formed between the second ends of the first cylindrical section 211 and the second end of the second cylindrical section 212. The inner wall of the second cylindrical section 212 and the second end of the second frame 22 form a valve inner cavity 23.

[0140] In this embodiment, the second frame 22 includes a main cylinder 225 and a valve port cylinder 222. The first end of the main cylinder 225 is open and connected to the fixed base 5. The valve port cylinder 222 is connected to the outside of the second end of the main cylinder 225. The outer diameter of the valve port cylinder 222 is smaller than the outer diameter of the main cylinder 225. A frame sealing ring 26 is sandwiched between the main cylinder 225 and the first frame 21. A second valve port 221 is opened on the valve port cylinder 222.

[0141] At the connection between the valve port cylinder 222 and the main cylinder 225, a limiting step surface is formed that is away from the electromagnetic mechanism 1. The valve port sealing ring 300 is sleeved on the outside of the valve port cylinder 222 and sandwiched between the bottom of the mounting valve cavity 202 and the limiting step surface. When the valve port bracket 2 is installed in the mounting valve cavity 202, the end of the valve port cylinder 222 away from the electromagnetic mechanism 1 extends into the on / off valve port 203.

[0142] A valve port sealing portion 226 protrudes from the valve port cylinder portion 222 in the direction toward the electromagnetic mechanism 1. The valve port sealing portion 226 surrounds the second valve port 221 and has an arc-shaped end, thereby increasing the sealing reliability of the second sealing cap 42 on the second valve port 221. In other embodiments, the valve port sealing portion 226 may also protrude from the side of the second sealing cap 42 away from the electromagnetic mechanism 1.

[0143] In this embodiment, the second elastic element 7 is located in the valve cavity 23. The first end of the second elastic element 7 abuts against the side wall of the valve cavity 23 facing the electromagnetic mechanism 1, and the second end of the second elastic element 7 presses against the second sealing cap 42. This allows the second elastic element 7 to bypass the first valve port 214, thereby further reducing the diameter of the first valve port 214, reducing the force acting on the first valve core 3 when it closes the first valve port 214, and lowering the voltage required for the first valve core 3 to open the valve. Simultaneously, this arrangement ensures that the outer diameter of the second elastic element 7 is not limited by the outer diameter of the first valve port 214, facilitating the selection of the second elastic element 7 and better ensuring that the second elastic element 7 has appropriate elastic force.

[0144] In this embodiment, the second connecting seat 43 includes a main seat portion 431, which is sleeved on the outside of the second sealing cap 42. The end of the main seat portion 431 away from the electromagnetic mechanism 1 extends outward to form an abutment ring portion 433. The second end of the second elastic member 7 abuts against the abutment ring portion 433, thereby increasing the diameter of the second elastic member 7 and making it easier to select a more suitable model for the second elastic member 7.

[0145] Other structures of the gas valve can be set with reference to the above embodiments, and will not be described again in this embodiment.

[0146] This embodiment also provides a gas-fired water heater, including the aforementioned gas valve. The gas-fired water heater provided in this embodiment, by employing the aforementioned gas valve, can improve the operational safety and reliability of the gas-fired water heater.

[0147] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0148] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A solenoid valve, characterized in that, include: Electromagnetic mechanism (1); A valve holder (2) is installed at the first end of the electromagnetic mechanism (1). The valve holder (2) has a circumferentially closed valve cavity (23). A first valve port (214) and a second valve port (221) are respectively provided at both ends of the valve cavity (23). The first valve port (214) is spaced between the second valve port (221) and the electromagnetic mechanism (1). The first valve core (3) has a first end that is slidably inserted into the electromagnetic mechanism (1) and a second end that has a first sealing cap (32). The first sealing cap (32) is movably disposed between the electromagnetic mechanism (1) and the first valve port (214) and can open or block the first valve port (214). The second valve core (4) has a first end coaxial and slidably inserted into the first valve core (3) and a second end with a second sealing cap (42). The second sealing cap (42) is movably disposed in the valve cavity (23) and can open or block the second valve port (221).

2. The electromagnetic valve according to claim 1, characterized by The maximum outer diameter of the second sealing cap (42) is greater than the diameter of the first valve port (214); And / or, the diameter of the first valve port (214) is R1, the diameter of the second valve port (221) is R2, and R1≤1.2R2.

3. The solenoid valve according to claim 1, characterized in that, The valve holder (2) has a venting cavity (215), which is at least partially located between the electromagnetic mechanism (1) and the first valve port (214). The valve holder (2) has a side vent (24) that communicates with the venting cavity (215). The first sealing cap (32) is movably disposed in the venting cavity (215). When the first valve core (3) opens the first valve port (214), the first valve port (214) communicates with the venting cavity (215) and the valve cavity (23).

4. The solenoid valve according to claim 3, characterized in that, The valve holder (2) includes a first frame (21) and a second frame (22). The first frame (21) is provided with the first valve port (214) and the venting cavity (215). The second frame (22) is provided with the second valve port (221). The first frame (21) and the second frame (22) are detachably connected and surround the valve cavity (23). The first frame (21) or the second frame (22) is installed at the end of the electromagnetic mechanism (1).

5. The electromagnetic valve according to claim 4, characterized by The first end of the first frame (21) is connected to the electromagnetic mechanism (1). The first frame (21) has an open mouth and a ventilation cavity (215) separated by an inner and outer opening. The open mouth is set on the side away from the electromagnetic mechanism (1). The second frame (22) is installed at the opening of the open mouth and surrounds the cavity wall of the open mouth to form the valve cavity (23). The first frame (21) has the side ventilation port (24).

6. The solenoid valve according to claim 5, characterized in that, The first frame (21) includes a first cylindrical part (211) and a second cylindrical part (212). The first end of the first cylindrical part (211) is connected to the electromagnetic mechanism (1) and the side wall is provided with the side vent (24). The first end of the second cylindrical part (212) is connected to the second end of the first cylindrical part (211), and the second end of the second cylindrical part (212) extends in the direction toward the electromagnetic mechanism (1) and is provided with the first valve port (214). The ventilation cavity (215) is formed between the first cylindrical part (211) and the second cylindrical part (212), and the inner cavity of the second cylindrical part (212) forms the open mouth.

7. The solenoid valve according to claim 5, characterized in that, The second end of the first frame (21) is provided with an installation ring groove, which surrounds the opening of the open mouth, and the periphery of the second frame (22) is installed in the installation ring groove.

8. The solenoid valve according to claim 7, characterized in that, One of the peripheral groove wall of the mounting ring groove and the outer wall of the second frame (22) is provided with a pressing protrusion ring (224), and the other presses against the pressing protrusion ring (224).

9. The solenoid valve according to claim 5, characterized in that, The second frame (22) includes a valve port cylinder (222) and a mounting ring (223) extending radially outward along the valve port cylinder (222). The mounting ring (223) is connected to the first frame (21), and the axial length of the mounting ring (223) is less than the axial length of the valve port cylinder (222). The inner hole of the valve port cylinder (222) forms the second valve port (221).

10. The solenoid valve according to claim 4, characterized in that, The first end of the second frame (22) is connected to the electromagnetic mechanism (1), the second end of the second frame (22) is provided with the second valve port (221), and the side of the second frame (22) is provided with the side vent (24). The first frame (21) is inserted inside the second frame (22), and a frame sealing ring (26) is provided between the end of the first frame (21) away from the electromagnetic mechanism (1) and the second frame (22). The ventilation cavity (215) and the valve cavity (23) are arranged side by side in the axial direction of the first valve core (3).

11. The solenoid valve according to claim 10, characterized in that, The second frame (22) is open at one end facing the electromagnetic mechanism (1), and the first frame (21) is inserted into the second frame (22) through the open end of the second frame (22) and is engaged with the second frame (22).

12. The solenoid valve according to claim 11, characterized in that, The first frame (21) has a protruding hook (216) on its side wall, and multiple hooks (216) are provided at intervals along the circumference of the first frame (21). The second frame (22) has a communication port (2111) on its side wall that communicates with the ventilation cavity (215). Multiple communication ports (2111) are provided at intervals along the circumference of the second frame (22). The hook part (216) is engaged with the side wall of the communication port (2111) facing the electromagnetic mechanism (1).

13. The solenoid valve according to claim 10, characterized in that, The second frame (22) includes a main cylinder (225) and a valve port cylinder (222) coaxially connected. The first end of the main cylinder (225) is installed on the electromagnetic mechanism (1). The valve port cylinder (222) is connected to the outer side of the second end of the main cylinder (225). The outer diameter of the main cylinder (225) is larger than the outer diameter of the valve port cylinder (222). The valve port cylinder (222) is provided with a second valve port (221). The frame sealing ring (26) is provided between the inner wall of the second end of the main cylinder (225) and the first frame (21).

14. The solenoid valve according to any one of claims 1-13, characterized in that, The electromagnetic mechanism (1) has a fixed seat (5) on the side facing the first sealing cap (32). The fixed seat (5) has a base plate (51) that abuts against the end of the electromagnetic mechanism (1) and a cylindrical part (53) that surrounds the periphery of the base plate (51). One end of the valve holder (2) is inserted into the cylindrical part (53) and abuts against the base plate (51).

15. A gas valve, characterized in that, include: The valve seat (200) has an air inlet channel (201), a valve mounting chamber (202) and an air outlet channel connected in sequence. The bottom of the valve mounting chamber (202) is provided with an on / off valve port (203) that connects to the air outlet channel. The solenoid valve as described in any one of claims 1-14, wherein the solenoid mechanism (1) is sealed and installed on the outside of the valve seat (200) and the valve port bracket (2) is inserted into the mounting valve cavity (202), the second valve port (221) is directly connected to the on / off valve port (203), and when the first sealing cap (32) opens the first valve port (214), the air intake channel (201) is connected to the first valve port (214); A valve port sealing ring (300) is sandwiched between the valve port bracket (2) and the bottom of the mounting valve chamber (202), and the valve port sealing ring (300) surrounds the outside of the on / off valve port (203) and the second valve port (221).

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