An electromagnetic valve, a gas distribution device and a gas water heater

Abstract

The utility model belongs to the technical field of heating, specifically discloses a kind of solenoid valve, gas distribution device and gas hot water equipment.Electromagnetic valve includes electromagnetic mechanism, multiple valve core and multiple elastic parts, the inside of electromagnetic mechanism has at least two and interval arrangement installation shaft hole, the first end of installation shaft hole is closed and second end open setting, the coil group of electromagnetic mechanism is encircled in the outside of all installation shaft hole;Valve core's first end is coaxial and is slidably inserted in corresponding installation shaft hole, the second end of valve core is stretched out the outside of installation shaft hole and has sealing cap;Elastic part applies elastic force to corresponding valve core away from electromagnetic mechanism, the elastic modulus of all elastic parts is different, when the electromagnetic mechanism stops working, the elastic part is used to reset corresponding valve core.The utility model can realize the on-off control of one solenoid valve to multiple channels, reduce the cost of solenoid valve and gas distribution device, improve use experience.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to an electromagnetic valve, a gas distribution device, and a gas-fired hot water equipment. Background Technology

[0002] Gas-fired water heaters generate heat through the combustion of gas in their internal combustion device, thereby providing heat supply. The combustion device includes multiple burners arranged side by side and a gas distribution device that supplies gas to the burners.

[0003] The prior art provides a gas distribution device, which includes a gas distribution seat, a first solenoid valve and a second solenoid valve. The gas distribution rod has a first gas distribution chamber, a second gas distribution chamber, a third gas distribution chamber and a valve mounting chamber. The gas distribution rod has a first valve chamber and a second valve chamber. The bottom of the first valve chamber has a first valve port that communicates with the first gas distribution chamber. The bottom of the second valve chamber has a second valve port that communicates with the second gas distribution chamber. Both the first valve chamber and the second valve chamber are connected to the air inlet channel of the gas distribution rod. The first solenoid valve is installed in the first valve chamber and is used to control the opening and closing of the first valve port. The second solenoid valve is installed in the second valve chamber and is used to control the opening and closing of the second valve port.

[0004] Existing gas distribution devices control the opening and closing of the first and second valve ports via a first solenoid valve and a second solenoid valve, respectively, enabling gas distribution control of the first and second gas distribution chambers. However, because two solenoid valves are required, during the use of gas-fired water heaters, incorrect installation of the first and second solenoid valves or errors in the control logic can easily lead to incorrect control timing of the two control valves, resulting in gas distribution problems and affecting the reliability of the gas distribution device, thereby affecting the segmented combustion reliability of the gas-fired water heater. Furthermore, using two solenoid valves to control the gas supply to the two gas distribution chambers separately complicates the structure of the gas distribution rod and increases the cost of the gas distribution device, which is detrimental to cost reduction in both the gas distribution device and the gas-fired water heater. 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 problems of high cost and poor control accuracy caused by using two solenoid valves to control two channels respectively.

[0006] The second technical problem solved by this utility model is to provide a gas distribution device that can effectively solve the problems of high cost and poor control accuracy caused by the use of two solenoid valves to control two channels separately in existing gas distribution devices.

[0007] The third technical problem solved by this utility model is to provide a gas-fired water heater that can effectively solve the problems of high cost and poor control accuracy caused by the use of two solenoid valves to control two channels separately in existing gas-fired water heaters.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A solenoid valve, comprising:

[0010] An electromagnetic mechanism has at least two parallel and spaced mounting shaft holes inside, with a first end closed and a second end open, and a coil group of the electromagnetic mechanism surrounding the outside of all the mounting shaft holes.

[0011] Multiple valve cores are provided, each corresponding to a mounting shaft hole. The first end of each valve core is slidably inserted into the corresponding mounting shaft hole, and the second end of each valve core extends out of the mounting shaft hole and has a sealing cap.

[0012] Multiple elastic elements are provided, each corresponding to a valve core, and all elastic elements have different elastic moduli; when the electromagnetic mechanism stops working, the elastic elements are used to reset the corresponding valve core.

[0013] Compared with the prior art, the electromagnetic valve of this utility model has the following advantages: Because the electromagnetic mechanism cooperates with multiple valve cores arranged side-by-side, and the elastic moduli of the elastic elements corresponding to the multiple valve cores are different, the resultant force of the electromagnetic force and elastic force on the multiple valve cores is different under the same driving current. This allows the electromagnetic mechanism to drive different numbers of valve cores to move in the direction towards the electromagnetic mechanism under different driving currents, enabling one electromagnetic valve to control the on / off state of multiple channels and reducing the cost of the electromagnetic valve. Simultaneously, because the electromagnetic mechanism controls the magnitude of the energizing current to achieve the separate movement of multiple valve cores, and the action sequence of each valve core remains fixed as the current gradually increases, the starting sequence of each valve core will not be disordered, effectively ensuring the operational reliability of the electromagnetic valve.

[0014] In one embodiment, the solenoid valve further includes a valve port frame connected to the end of the solenoid mechanism. The valve port frame has a valve cavity and multiple vent valve ports communicating with the valve cavity. Each vent valve port corresponds to a valve core. A side vent port communicating with the valve cavity is provided on the side wall of the valve port frame. All the sealing caps are movably disposed inside the valve port frame and can block or open the corresponding vent valve ports.

[0015] In one embodiment, the end of the sealing cap away from the electromagnetic mechanism has a protruding sealing ring portion, which can abut against the valve holder to block the vent valve port.

[0016] In one embodiment, the valve holder is a cylindrical structure with one end open, the bottom of the valve holder is provided with the vent valve port, and the end of the electromagnetic mechanism is provided with a positioning protrusion protruding in the direction toward the sealing cap.

[0017] The positioning protrusion has a ring structure, and the open end of the valve port frame is sleeved on the outside of the positioning protrusion and abuts against the end of the electromagnetic mechanism; or, multiple positioning protrusions are arranged at intervals around the center line of the coil group, and all the positioning protrusions abut against the inner sidewall of the valve port frame.

[0018] In one embodiment, each valve core includes a valve shaft, the first end of which is slidably inserted into the corresponding mounting shaft hole, and the second end of the valve core is connected to the corresponding sealing cap;

[0019] All the valve shafts are the same size; and / or, the elastic element is sleeved on the outside of the corresponding valve shaft and its two ends abut against the sealing cap and the electromagnetic mechanism, respectively.

[0020] In one embodiment, the electromagnetic mechanism has a plurality of sleeves mounted inside the coil group, the plurality of sleeves being spaced apart around the central axis of the coil group, and the inner cavity of the sleeves forming the mounting shaft hole;

[0021] Alternatively, the electromagnetic mechanism has a fixed iron core installed inside the coil group, and the fixed iron core has a plurality of mounting shaft holes, which are spaced apart around the center line of the coil group;

[0022] Alternatively, the electromagnetic mechanism may have a fixed iron core installed inside the coil group, with multiple fixed iron cores spaced apart around the central axis of the coil group, and each fixed iron core having a mounting shaft hole.

[0023] In one embodiment, the elastic element is used to apply an elastic force to the corresponding valve core, causing it to move in a direction away from the electromagnetic mechanism.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] A gas distribution device, comprising:

[0026] The air distribution seat has an air distribution chamber, an air inlet channel communicating with the air distribution chamber, and multiple air distribution channels communicating with the air distribution chamber. The air inlet port of the air distribution channel forms an on / off valve port.

[0027] As described above, the solenoid valve is installed on the gas distribution seat and the valve core is configured to correspond one-to-one with the on / off valve port. The sealing cap of the valve core can open or close the corresponding on / off valve port.

[0028] Compared with the prior art, the gas distribution device of this utility model has the following advantages: by using the above-mentioned solenoid valve, one solenoid valve can control the opening and closing of multiple gas distribution channels, simplifying the structure of the gas distribution device, reducing the cost of the gas distribution device, and effectively improving the reliability of gas distribution and enhancing the user experience of the gas distribution device.

[0029] In one embodiment, the bottom of the gas distribution chamber is provided with a sealing protrusion around the on / off valve port, and the sealing protrusion is provided in a one-to-one correspondence with the on / off valve port. The sealing cap can abut against the corresponding sealing protrusion to block the on / off valve port.

[0030] Alternatively, the sealing cap may have a sealing ring protruding from one end away from the electromagnetic mechanism, the sealing ring being able to abut against the bottom of the gas distribution chamber to block the on / off valve port.

[0031] The second technical problem mentioned above is solved by the following technical solution:

[0032] The air distribution seat has an air distribution chamber, an air inlet channel communicating with the air distribution chamber, and multiple air distribution channels communicating with the air distribution chamber. The air inlet port of the air distribution channel forms an on / off valve port.

[0033] As described above, in the solenoid valve, the solenoid mechanism is installed on the outside of the gas distribution seat, the valve port bracket is located between the bottom of the gas distribution chamber and the solenoid mechanism, the side vent connects the gas distribution chamber and the valve chamber, and the on / off valve port and the vent valve port are arranged opposite to each other and connected.

[0034] A valve port sealing ring is sandwiched between the bottom of the gas distribution chamber and the valve port frame. The valve port sealing ring is provided in a one-to-one correspondence with the on / off valve port and surrounds the outside of the corresponding on / off valve port and the gas valve port.

[0035] In one embodiment, a sealing ring groove is provided at the bottom of the gas distribution chamber. The sealing ring groove is provided in a one-to-one correspondence with the on / off valve port and surrounds the on / off valve port. The valve port sealing ring is installed in the sealing ring groove and pressed between the bottom of the sealing ring groove and the valve port frame.

[0036] In one embodiment, the gas distribution seat is provided with a sealing groove around the opening of the gas distribution chamber, and a mounting sealing ring is installed in the sealing groove. The mounting sealing ring is interference-fitted onto the outer wall of the first side of the valve port bracket, and the mounting sealing ring is pressed between the bottom of the sealing groove and the end of the electromagnetic mechanism.

[0037] The third technical problem mentioned above is solved by the following technical solution:

[0038] A gas-fired hot water device includes a gas distribution device as described above.

[0039] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: by adopting the above-mentioned gas-fired water heater, the reliability of segmented operation of the gas-fired water heater can be improved, the control accuracy of the gas-fired water heater can be improved, and the user experience of the gas-fired water heater can be enhanced. Attached Figure Description

[0040] Figure 1 A cross-sectional view of the solenoid valve provided in Embodiment 1 of this utility model;

[0041] Figure 2 A cross-sectional view of the gas distribution device provided in Embodiment 1 of this utility model when the solenoid valve is in the off state;

[0042] Figure 3 This is a cross-sectional view of the gas distribution device provided in Embodiment 1 of this utility model when the solenoid valve is in the gas distribution conduction state;

[0043] Figure 4 A cross-sectional view of the gas distribution device provided in Embodiment 1 of this utility model when the solenoid valve is in the fully open state;

[0044] Figure 5 A cross-sectional view of the solenoid valve provided in Embodiment 2 of this utility model;

[0045] Figure 6 A cross-sectional view of the gas distribution device in the fully open state of the solenoid valve is provided for Embodiment 2 of this utility model;

[0046] Figure 7 A cross-sectional view of the gas distribution device provided in Embodiment 3 of this utility model when the solenoid valve is in the fully open state;

[0047] Figure 8 A cross-sectional view of the solenoid valve provided in Embodiment 4 of this utility model;

[0048] Figure 9 This is a cross-sectional view of the gas distribution device provided in Embodiment 4 of this utility model when the solenoid valve is in the fully open state;

[0049] Figure 10 This is a schematic diagram of the structure of the solenoid valve provided in Embodiment 4 of this utility model;

[0050] Figure 11 This is a schematic diagram of the structure of the solenoid valve provided in Embodiment 5 of this utility model.

[0051] Label Explanation:

[0052] 100. Solenoid valve; 200. Air distribution seat; 201. Inlet passage; 202. Air distribution passage; 202a. First air distribution passage; 202b. Second air distribution passage; 203. On / off valve port; 203a. First valve port; 203b. Second valve port; 204. Air distribution chamber; 205. Sealing protrusion ring; 300. Valve port sealing ring; 400. Installed sealing ring;

[0053] 1. Electromagnetic mechanism; 11. Coil assembly; 111. Coil bracket; 112. Coil group; 12. Fixed iron core; 12a. First iron core; 12b. Second iron core; 121. Mounting shaft hole; 121a. First shaft hole; 121b. Second shaft hole; 13. Sleeve; 14. Magnetic guide frame; 141. Base plate; 142. Side plate; 15. Magnetic guide plate; 151. Inner magnetic guide plate; 152. Outer magnetic guide plate; 1521. Conical ring; 1522. Positioning protrusion; 16. First sealing ring; 17. Second sealing ring;

[0054] 2. Valve core; 2a. First valve core; 2b. Second valve core; 21. Valve shaft; 21a. First valve shaft; 21b. Second valve shaft; 22. Sealing cap; 22a. First sealing cap; 22b. Second sealing cap; 221. Sealing ring;

[0055] 3. Elastic element; 3a. First elastic element; 3b. Second elastic element;

[0056] 4. Valve port bracket; 41. End sealing plate; 411. Vent valve port; 411a. First vent valve port; 411b. Second vent valve port; 411c. Third vent valve port; 42. Side panel; 421. Side vent. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Example 1

[0062] This embodiment provides a gas distribution device that can be applied to gas-fired water heaters to control the segmented combustion of the gas-fired water heaters and improve the reliability of the segmented combustion of the gas-fired water heaters.

[0063] like Figures 1 to 4 As shown, the gas distribution device includes a gas distribution seat 200 and a solenoid valve 100. The gas distribution seat 200 has a gas distribution chamber 204 and an air inlet channel 201 communicating with the gas distribution chamber 204, and multiple gas distribution channels 202. The air inlet port of each gas distribution channel 202 forms an on / off valve port 203. The solenoid valve 100 includes a solenoid mechanism 1, a valve core 2, and an elastic element 3. The solenoid mechanism 1 has at least two parallel and spaced mounting shaft holes 121 inside. The first end of the mounting shaft hole 121 is closed and the second end is open. The coil group 112 of the solenoid mechanism 1 surrounds the outside of all the mounting shaft holes 121. The valve core 2 is arranged one-to-one with the mounting shaft hole 121. The first end of the valve core 2 is slidably inserted into the corresponding mounting shaft hole 121, and the second end of the valve core 2 extends out of the outside of the mounting shaft hole 121 and has a sealing cap 22. The valve core 2 is coaxial with the mounting shaft hole 121. The elastic element 3 is arranged one-to-one with the valve core 2. All elastic elements 3 have different elastic moduli. When the solenoid mechanism 1 stops working, the elastic element is used to reset the corresponding valve core.

[0064] Specifically, the electromagnetic mechanism 1 has multiple driving states, and in different driving states, the electromagnetic mechanism 1 can drive different numbers of valve cores 2 to move in the direction toward the electromagnetic mechanism 1. When the electromagnetic mechanism 1 is in different driving states, the electromagnetic mechanism 1 drives different numbers of valve cores 2 to open the corresponding on / off valve port 203, so that the corresponding air distribution channel 202 is connected to the corresponding air intake channel 201.

[0065] The solenoid valve 100 provided in this embodiment, because the electromagnetic mechanism 1 cooperates with multiple valve cores 2 arranged side by side, and the elastic modulus of the elastic elements 3 corresponding to the multiple valve cores 2 are different, causes the resultant force of the electromagnetic force and elastic force on the multiple valve cores 2 to be different under the same driving current. As a result, the electromagnetic mechanism 1 can drive different numbers of valve cores 2 to move in the direction toward the electromagnetic mechanism 1 under different driving currents, and can realize the on / off control of multiple channels by one solenoid valve 100, reducing the cost of the solenoid valve 100. At the same time, since the electromagnetic mechanism 1 realizes the movement of multiple valve cores 2 separately by controlling the magnitude of the energizing current, and the action sequence of each valve core 2 is fixed as the current gradually increases, the starting sequence of each valve core 2 will not be disordered, effectively ensuring the operational reliability of the solenoid valve 100.

[0066] The gas distribution device provided in this embodiment, by employing the aforementioned solenoid valve 100, can control the opening and closing of multiple gas distribution channels 202 with a single solenoid valve 100, simplifying the structure of the gas distribution device, reducing the cost of the gas distribution device, and effectively improving the reliability of gas distribution and enhancing the user experience of the gas distribution device.

[0067] It is worth noting that the solenoid valve 100 provided by this utility model can not only be applied in gas distribution devices to achieve individual on / off control of multiple gas distribution channels 202 in conjunction with the gas distribution seat 200, but also in other scenarios that require on / off control of two channels. That is, the gas distribution seat 200 can be other valve body structures. This utility model uses the application of the solenoid valve 100 in a gas distribution device as an example to introduce the structure of the gas distribution seat 200 and the solenoid valve 100. The application structure of the solenoid valve 100 in other scenarios can be set with reference to the structure in this utility model, and this utility model will not list them all.

[0068] In one embodiment, the elastic element 3 applies a force that causes the valve core 2 to move away from the electromagnetic mechanism 1. When the electromagnetic mechanism 1 is energized, it generates an electromagnetic force that drives the valve core 2 to move toward the electromagnetic mechanism 1. This ensures that when the electromagnetic mechanism 1 is de-energized, the sealing cap 22 of the valve core 2 can block the on / off valve port 203. When the electromagnetic mechanism 1 is energized, the electromagnetic force generated is greater than the elastic force of the corresponding elastic element 3, causing the valve core 2 to move toward the electromagnetic mechanism 1 to open the corresponding on / off valve port 203. That is, the solenoid valve 100 is a normally closed solenoid valve.

[0069] In another embodiment, the elastic element 3 applies an elastic force that causes the valve core 2 to move toward the electromagnetic mechanism 1. When the electromagnetic mechanism 1 is energized, it generates an electromagnetic force that drives the valve core 2 to move away from the electromagnetic mechanism 1. So that when the electromagnetic mechanism 1 is de-energized, the valve core 2 is held in the position of opening the on / off valve port 203 under the action of the elastic force of the elastic element 3. After the electromagnetic mechanism 1 is switched on and off, if the electromagnetic force applied to the valve core 2 by the electromagnetic mechanism 1 is greater than the elastic force of the corresponding elastic element 3, then the valve core 2 moves away from the electromagnetic mechanism 1 to block the corresponding on / off valve port 203. That is, the solenoid valve is a normally open solenoid valve.

[0070] In this utility model, taking the solenoid valve 100 as a normally closed solenoid valve as an example, the solenoid valve 100 and the cooperation structure between the solenoid valve 100 and the gas distribution seat 200 are introduced. The structure of the solenoid valve 100 as a normally open solenoid valve can be set with reference to the structure provided in this utility model. This utility model will not list them one by one.

[0071] In one embodiment, two gas distribution channels 202 are provided, namely a first gas distribution channel 202a and a second gas distribution channel 202b, and two on / off valve ports 203 are respectively a first valve port 203a and a second valve port 203b. Correspondingly, two valve cores 2 are provided, namely a first valve core 2a and a second valve core 2b, with the sealing cap 22 of the first valve core 2a being a first sealing cap 22a and the sealing cap 22 of the second valve core 2b being a second sealing cap 22b; two mounting shaft holes 121 are provided, namely a first shaft hole 121a and a second shaft hole 121b, with the first end of the first valve core 2a being coaxial and slidably inserted into the first shaft hole 121a, and the first end of the second valve core 2b being coaxial and slidably inserted into the second shaft hole 121b.

[0072] Two elastic elements 3 are provided, namely a first elastic element 3a and a second elastic element 3b. The first elastic element 3a is used to apply an elastic force to the first valve core 2a to move it away from the electromagnetic mechanism 1, so that the first valve core 2a can be maintained or returned to the closed position blocking the first valve port 203a under the action of the first elastic element 3a. The second elastic element 3b is used to apply an elastic force to the second valve core 2b to move it away from the electromagnetic mechanism 1, so that the second valve core 2b can be maintained or returned to the closed position closing the second valve port 203b under the elastic force of the second elastic element 3b.

[0073] When the electromagnetic mechanism 1 is in the first driving state, the electromagnetic force applied by the electromagnetic mechanism 1 to the first valve core 2a overcomes the elastic force generated by the first elastic element 3a, thereby enabling the first valve core 2a to move in the direction toward the electromagnetic mechanism 1, so that the first valve core 2a can reach the open position of opening the first valve port 203a, the second sealing cap 22b blocks the second valve port 203b, and the solenoid valve 100 is in the gas distribution conduction state; when the electromagnetic mechanism 1 is in the second driving state, the electromagnetic force applied by the electromagnetic mechanism 1 to the second valve core 2b overcomes the elastic force of the second elastic element 3b, so that the second valve core 2b moves in the direction toward the electromagnetic mechanism 1, thereby the second valve core 2b switches to the open position of opening the second valve port 203b, and the solenoid valve 100 is in the fully conduction state.

[0074] To improve the ease of installation of the solenoid valve 100, the air distribution chamber 204 extends through one side of the air distribution seat 200 to form an installation opening. One side of the air distribution chamber 204 is connected to the air intake channel 201. Multiple on / off valve ports 203 are provided at the bottom of the air distribution chamber 204, directly opposite the installation opening. The solenoid mechanism 1 is sealed and installed at the installation opening, and the second ends of multiple valve cores 2 extend into the air distribution chamber 204. Specifically, a first valve port 203a and a second valve port 203b are provided at the bottom of the air distribution chamber 204, arranged side-by-side. Both the first sealing cap 22a and the second sealing cap 22b extend into the air distribution chamber 204.

[0075] To improve the sealing reliability of the valve core 2 to the corresponding on / off valve port 203, in one embodiment, a sealing convex ring portion 205 is provided protruding from the bottom of the gas distribution chamber 204. The sealing convex ring portion 205 is provided one-to-one with the on / off valve port 203 and surrounds the corresponding on / off valve port 203. The sealing cap 22a can abut against the sealing convex ring portion 205 to achieve the sealing of the on / off valve port 203. By providing the sealing convex ring portion 205, it is possible to improve the sealing reliability of the sealing cap 22a by pressing the end face of the sealing convex ring portion 205 against the sealing cap 22a when the valve core 2 moves towards the corresponding on / off valve port 203, thereby avoiding gaps between the sealing cap 22a and the sealing convex ring portion 205.

[0076] The end of the sealing ring 205 facing the installation opening is an arc surface, which can enhance the compression effect between the sealing cap 22 and the sealing ring 205, and improve the sealing tightness and reliability.

[0077] Each valve core 2 includes a valve shaft 21, the first end of which is slidably inserted into a corresponding mounting shaft hole 121, and the second end is coaxially connected to a sealing cap 22. Specifically, the first valve core 2a also includes a first valve shaft 21a, the first end of which is slidably inserted into a first shaft hole 121a, and the second end extends out of the first shaft hole 121a and is connected to a first sealing cap 22a; the second valve core 2b includes a second valve shaft 21b, the first end of which is slidably inserted into a second shaft hole 121b, and the second end of which is coaxially connected to a second sealing cap 22b.

[0078] Each valve core 2 includes a valve shaft 21, the first end of which is slidably inserted into a corresponding mounting shaft hole 121, and the second end of the valve core 2 is connected to a corresponding sealing cap 22. All valve shafts 21 have the same dimensions, and all elastic elements 3 have different elastic moduli. Since all valve cores 2 have the same dimensions, the electromagnetic force generated on all valve cores 2 is the same when the electromagnetic mechanism 1 is energized. Therefore, by setting all elastic elements 3 to have different elastic moduli, it is possible to drive different valve cores 2 to move due to the difference between the elastic force applied by different elastic elements 3 and the electromagnetic force when the electromagnetic mechanism 1 is in different driving states.

[0079] That is, by setting the valve shaft 21 to the same size, it is easy to realize the modular and interchangeable setting of multiple valve cores 2, which can easily reduce the processing difficulty and processing cost of valve core 2, and facilitate the maintenance and replacement of solenoid valve 100, reducing the processing and use cost of solenoid valve 100. At the same time, it is also easy to select each elastic element 3 to control the movement of each valve core 2.

[0080] For example, there are two valve cores 2, namely a first valve core 2a and a second valve core 2b. The first valve core 2a and the second valve core 2b have the same structure. When the electromagnetic mechanism 1 is de-energized, the elastic force of the first elastic member 3a acting on the first valve core 2a is less than the elastic force of the second elastic member 3b acting on the second valve core 2b. Since the first valve core 2a and the second valve core 2b have the same structure, the electromagnetic force generated by the electromagnetic mechanism 1 on the first valve core 2a and the second valve core 2b is the same when the electromagnetic mechanism 1 is energized. Therefore, when the electromagnetic mechanism 1 is in the first driving state, the electromagnetic force generated by the electromagnetic mechanism 1 on the first valve core 2a and the second valve core 2b first overcomes the elastic force of the first elastic member 3a, causing the first valve core 2a to move in the direction toward the electromagnetic mechanism 1. When the electromagnetic force generated by the electromagnetic mechanism 1 increases to the point that it can overcome the elastic force of the second elastic member 3b, the second valve core 2b moves in the direction toward the electromagnetic mechanism 1 under the combined action of the electromagnetic mechanism 1 and the second elastic member 3b.

[0081] In other embodiments, the cross-sectional areas of each valve shaft 21 are different, and the elastic moduli of each elastic element 3 are the same or not significantly different. Specifically, the cross-section of the first valve shaft 21a is larger than that of the second valve shaft 21b. As a result, when the same current is applied to the electromagnetic mechanism 1, the electromagnetic force on the first valve core 2a is greater than that on the second valve core 2b, thereby allowing the first elastic element 3a and the second elastic element 3b to have approximately the same elastic modulus.

[0082] In one embodiment, the electromagnetic mechanism 1 has a fixed iron core 12 installed inside the coil assembly 112. The fixed iron core 12 has multiple mounting shaft holes 121, which are spaced apart around the center line of the coil assembly 112. By providing mounting shaft holes 121 on the fixed iron core 12, the forming difficulty of the mounting shaft holes 121 is reduced, thereby reducing the processing difficulty of the electromagnetic mechanism 1 and improving the user experience. Simultaneously, by providing mounting shaft holes 121 on the fixed iron core 12, the electromagnetic force acting on the valve core 2 is enhanced by increasing the mating area between the fixed iron core 12 and the valve core 2, thereby reducing the current required to drive the valve core 2. Specifically, the fixed iron core 12 has a first shaft hole 121a and a second shaft hole 121b.

[0083] Specifically, the electromagnetic mechanism 1 includes a coil assembly 11, a magnetic guide assembly, and a sleeve 13. The coil assembly 11 includes a coil support 111 with a central through hole, a coil group 112 mounted on the coil support 111, and a plastic-encapsulated shell covering the coil support 111 and the outside of the coil. The magnetic guide assembly includes a magnetic guide frame 14 and a magnetic guide plate 15. The magnetic guide frame 14 includes a base plate portion 141 and two side plate portions 142 connected to form a U-shaped structure. The base plate portion 141 is connected to the end of the coil assembly 11 away from the first sealing cap 22a, and the magnetic guide plate 15 is connected to the ends of the two side plate portions 142 away from the base plate portion 141. That is, the coil assembly 11 is axially sandwiched between the base plate portion 141 and the magnetic guide plate 15. A mounting sealing ring 400 is provided between the magnetic guide plate 15 and the open end face of the mounting opening to prevent gas leakage through the mounting position of the solenoid valve 100. The sleeve 13 is inserted into the central through hole, and the fixed iron core 12 is installed inside the sleeve 13 with its first end fastened to the base plate 141. The end of the sleeve 13 away from the first valve core 2a abuts against the base plate 141. To reduce the probability of gas leakage, a sealing ring groove is provided on the outer wall of the fixed iron core 12, and a first sealing ring 16 is installed in the sealing ring groove, which abuts against the inner wall of the sleeve 13.

[0084] In other embodiments, the electromagnetic mechanism 1 has a plurality of sleeves 13 mounted inside the coil group 112, the plurality of sleeves 13 being spaced apart around the central axis of the coil group 112, and the inner cavity of the sleeves 13 forming mounting shaft holes.

[0085] In one embodiment, the magnetic plate 15 includes a magnetic inner plate 151 and a magnetic outer plate 152. The magnetic inner plate 151 is sandwiched between the magnetic outer plate 152 and the end face of the coil assembly 11. The magnetic outer plate 152 is connected to two side plate portions 142. The magnetic inner plate 151 has an inner through hole coaxially connected to the central through hole, and the magnetic outer plate 152 has an outer through hole coaxially connected to the central through hole. All valve shafts 21 pass through the inner and outer through holes to exit the electromagnetic mechanism 1.

[0086] The outer magnetic plate 152 has a conical ring portion 1521 that surrounds the outer perforation and protrudes away from the inner magnetic plate 151. The conical ring portion 1521 and the inner magnetic plate 151 form an installation ring groove. The end of the sleeve 13 facing the sealing cap 22a extends into the installation ring groove and abuts against the inner wall of the conical ring portion 1521. A second sealing ring 17 is provided in the installation ring groove. The second sealing ring 17 abuts against the inner wall of the conical ring portion 1521, the sleeve 13, and the inner magnetic plate 151 to seal the gap between the magnetic assembly and the sleeve 13, as well as the gap between the inner magnetic plate 151 and the outer magnetic plate 152, preventing gas leakage through the gap between the magnetic assembly and the sleeve 13 and the gap between the inner magnetic plate 151 and the outer magnetic plate 152. At the same time, the conical ring portion 1521 can also stop the sleeve 13 from moving away from the fixed iron core 12, ensuring the stability and reliability of the sleeve 13.

[0087] In other embodiments, the magnetic plate 15 may also be a single plate structure, and the sleeve 13 includes a main cylinder portion inserted inside the coil support 111. The end of the main cylinder portion away from the fixed iron core 12 extends outward to form a mounting plate portion. The mounting plate portion is partially raised in a direction away from the coil support 111 to form a raised portion, and the elastic member 3a is sleeved on the outside of the raised portion.

[0088] It is worth noting that the specific structure of the coil assembly 11 and the magnetic conductive assembly is only an exemplary structure. The existing structures of the coil assembly 11 and the magnetic conductive assembly used in the solenoid valve 100 can be applied to this utility model. Furthermore, the principle of the electromagnetic mechanism 1 driving the valve core 2 is existing technology, and this embodiment does not limit or elaborate on it.

[0089] In one embodiment, the first sealing cap 22a and the second sealing cap 22b have a distance D, 0.5mm≤D≤15mm, which can avoid interference between the first valve core 2a and the second valve core 2b and improve the operational reliability of the first valve core 2a and the second valve core 2b.

[0090] In one embodiment, the elastic element 3 is sleeved on the outside of the valve shaft 21, with its two ends abutting against the solenoid mechanism 1 and the sealing cap 22, respectively. This arrangement helps reduce the assembly difficulty of the solenoid valve 100, improves assembly efficiency, and provides sufficient space for the elastic element 3, facilitating the selection of the elastic element 3 and ensuring its elastic force. In other embodiments, the elastic element 3a can be disposed between the bottom of the mounting shaft hole 121 and the valve shaft 21.

[0091] Specifically, the first elastic element 3a is sleeved on the outside of the first valve shaft 21a, and its two ends abut against the electromagnetic mechanism 1 and the first sealing cap 22a, respectively. The second elastic element 3b is sleeved on the outside of the second valve shaft 21b, and its two ends abut against the electromagnetic mechanism 1 and the second sealing cap 22b, respectively. The first ends of both the first elastic element 3a and the second elastic element 3b abut against the conical ring portion 1521.

[0092] This embodiment provides a gas-fired water heater, including the aforementioned gas distribution device. The gas-fired water heater provided in this embodiment can improve the reliability of segmented combustion in gas-fired water heaters, reduce costs, and enhance the user experience.

[0093] Example 2

[0094] This embodiment provides a solenoid valve 100 and a gas distribution device including the solenoid valve 100. The gas distribution device provided in this embodiment has the same basic structure as the gas distribution device provided in the above embodiments, with only some differences in the configuration. This embodiment will not describe the same structure as the above embodiments again.

[0095] like Figure 5 and Figure 6 As shown, in this embodiment, the fixed iron core 12 and the valve core 2 are arranged in a one-to-one correspondence. Each fixed iron core 12 has a mounting shaft hole 121, and multiple fixed iron cores 12 are arranged at intervals around the center line of the coil assembly 11. By arranging the valve core 2 and the fixed iron core 12 in a one-to-one correspondence, the size of a single fixed iron core 12 can be reduced, thereby reducing the processing difficulty of the fixed iron core 12, reducing the processing cost of the fixed iron core 12, and improving the processing yield of the fixed iron core 12. Specifically, the end of each fixed iron core 12 away from the sealing cap 22 is inserted into the base plate of the magnetic guide frame 14.

[0096] In this embodiment, two fixed iron cores 12 are provided, namely a first iron core 12a and a second iron core 12b; two valve cores 2 are provided, namely a first valve core 2a and a second valve core 2b. A first shaft hole 121a is provided on the first iron core 12a, and a second shaft hole 121b is provided on the second iron core 12b.

[0097] The electromagnetic mechanism 1 also includes a sleeve 13, which is installed inside the coil assembly 112. The sleeve 13 has open ends that correspond one-to-one with the fixed iron core 12. The fixed iron core 12 is installed inside the sleeve 13 and seals one end of the sleeve 13, while the valve core 2 exits from the other end of the sleeve 13. This arrangement, by using the sleeve 13, enhances the electromagnetic force acting on the valve core 2 and also facilitates positioning and limiting the installation of the fixed iron core 12. Furthermore, a first sealing ring 16 is provided between each fixed iron core 12 and its corresponding sleeve 13.

[0098] In this embodiment, the magnetic outer plate 152 has two external through holes, which are coaxially connected to the first shaft hole 121a and the second shaft hole 121b, respectively. The magnetic outer plate 152 has conical ring portions 1521 protruding from each of the two external through holes. The conical ring portions 1521 and the magnetic inner plate 151 form a mounting ring groove. The end of the sleeve 13 furthest from the fixed iron core 12 extends into the corresponding mounting ring groove and abuts against the conical ring portion 1521. A second sealing ring 17 is provided in the mounting ring groove, and the second sealing ring 17 is press-fitted onto the corresponding sleeve 13.

[0099] Other structures of the solenoid valve 100 and the gas distribution seat 200 can be set with reference to the above embodiments, and will not be described again in this embodiment.

[0100] This embodiment provides a gas-fired water heater, including the aforementioned gas distribution device. The gas-fired water heater provided in this embodiment can improve the reliability of segmented combustion in gas-fired water heaters, reduce costs, and enhance the user experience.

[0101] Example 3

[0102] This embodiment provides a solenoid valve 100 and a gas distribution device including the solenoid valve 100. The structure of the solenoid valve 100 provided in this embodiment is basically the same as that in the above embodiments, with only some differences in the configuration. This embodiment will not describe the same structure as the above embodiments again.

[0103] like Figure 7 As shown, in this embodiment, a sealing ring 221 protrudes from the end of the sealing cap 22a away from the electromagnetic mechanism 1. The sealing ring 221 is coaxially arranged with the valve shaft 21a, and the sealing ring 221 can abut against the opening end face of the corresponding on / off valve port 203 to seal the on / off valve port 203. By providing the sealing ring 221 on the sealing cap 22, the sealing tightness of the on / off valve port 203 can be ensured while reducing the processing requirements of the gas distributor 200 and reducing the processing cost of the gas distributor 200.

[0104] The end of the sealing ring 221 away from the electromagnetic mechanism 1 has an arc-shaped structure to enhance the compression between the sealing cap 22a and the opening end face of the on / off valve port 203.

[0105] Other structures of the solenoid valve 100 and the gas distribution seat 200 can be set with reference to the above embodiments, and will not be described again in this embodiment.

[0106] This embodiment provides a gas-fired water heater, including the aforementioned gas distribution device. The gas-fired water heater provided in this embodiment can improve the reliability of segmented combustion in gas-fired water heaters, reduce costs, and enhance the user experience.

[0107] Example 4

[0108] This embodiment provides a solenoid valve 100 and a gas distribution device including the solenoid valve 100. The solenoid valve 100 provided in this embodiment is a basic improvement based on the solenoid valve 100 in the above embodiments. This embodiment will not repeat the same structure as the above embodiments.

[0109] like Figures 8 to 10 As shown, in this embodiment, the solenoid valve 100 also includes a valve port frame 4. The first end of the valve port frame 4 is connected to the solenoid mechanism 1. The second end of the valve port frame 4 is provided with a plurality of vent valve ports 411. The vent valve ports 411 are provided in a one-to-one correspondence with the valve core 2. The side wall of the valve port frame 4 is provided with a side vent port 421. All sealing caps 22 are movably disposed inside the valve port frame 4, and the sealing caps 22 can open or block the corresponding vent valve ports 411.

[0110] The valve holder 4 is installed in the air distribution chamber 204 and is located between the bottom of the air distribution chamber 204 and the end of the electromagnetic mechanism 1. The on / off valve port 203 and the air valve port 411 are arranged in a one-to-one correspondence and are sealed and connected. The inner cavity of the valve holder 4 is connected to the air intake channel 201 through the side air port 421.

[0111] By setting the valve holder 4, the machining accuracy requirements of the on / off valve port 203b on the gas distributor 200 can be reduced, thereby reducing the machining cost of the gas distributor 200. At the same time, since the sealing reliability of the valve core 2 to the on / off valve port 203a is determined by the sealing reliability of the valve core 2 to the vent valve port 411, the machining of the valve holder 4 can effectively ensure the sealing reliability of the valve core 2 to the vent valve port 411, reducing the overall structural cost of the gas distributor. Moreover, if there is a machining error in the vent valve port 411, it is easy to improve the overall product yield by remachining the valve holder 4, and increase the difficulty of maintenance and replacement. In addition, the setting of the valve holder 4 also facilitates the modularization of the solenoid valve 100.

[0112] In one embodiment, when the electromagnetic mechanism 1 is de-energized, the valve core 2 blocks the corresponding vent valve port 411; when the electromagnetic mechanism 1 is in a driving state, the electromagnetic mechanism 1 drives at least part of the valve core 2 to open the corresponding vent valve port 411, so that the side vent port 421 is connected to the vent valve port 411, thereby making the air intake channel 201, the air distribution chamber 204, the valve chamber, the vent valve port 411, the on / off valve port 203 and the corresponding air distribution channel 202 connected in sequence.

[0113] Specifically, in this embodiment, there are two valve cores 2 and two vent valve ports 411. The two vent valve ports 411 are a first vent valve port 411a and a second vent valve port 411b, respectively. A first sealing cap 22a is movably disposed in the valve port frame 4 and can open or close the first vent valve port 411a. A second sealing cap 22b is movably disposed in the valve port frame 4 and can open or close the second vent valve port 411b.

[0114] When the solenoid valve 100 is in the off state, the first sealing cap 22a blocks the first vent valve port 411a, thereby blocking the communication between the first valve port 203a and the inner cavity of the valve port frame 4, thus blocking the first valve port 203a; the second sealing cap 22b blocks the second vent valve port 411b, thereby blocking the communication between the second valve port 203b and the inner cavity of the valve port frame 4, thus blocking the communication between the second valve port 203b and the air intake channel 201.

[0115] When the electromagnetic mechanism 1 is in the first driving state, the first sealing cap 22a opens the first vent valve port 411a, so that the air inlet channel 201, the side vent port 421, the inner cavity of the valve port frame 4, the first vent valve port 411a, the first valve port 203a and the first air distribution channel 202a are sequentially connected, and the second sealing cap 22b blocks the second valve port 203b.

[0116] When the electromagnetic mechanism 1 is in the second driving state, the first sealing cap 22a opens the first vent valve port 411a, so that the intake channel 201, the side vent port 421, the inner cavity of the valve holder 4, the first vent valve port 411a, the first valve port 203a and the first gas distribution channel 202a are connected in sequence, and the intake channel 201, the side vent port 421, the inner cavity of the valve holder 4, the second vent valve port 411b, the second valve port 203b and the second gas distribution channel 202b are connected in sequence, so that the gas entering from the intake channel 201 is diverted to the first gas distribution channel 202a and the second gas distribution channel 202b.

[0117] In this embodiment, the valve holder 4 is a cylindrical structure with an opening at the first end. The valve holder 4 includes an end sealing plate portion 41 and a side surrounding plate portion 42 connected to the periphery of the end sealing plate portion 41. The end sealing plate portion 41 has a vent valve port 411. The end sealing plate portion 41 and the side surrounding plate portion 42 form an inner cavity. The side wall of the side surrounding plate portion 42 has a side vent port 421 that connects the inner cavity and the air inlet channel 201. The end sealing plate portion 41 is sealed to the bottom of the air distribution chamber 204.

[0118] The side vent 421 is preferably provided in multiple intervals along the circumference of the valve port frame 4 to ensure the air flow rate.

[0119] In this embodiment, a valve port sealing ring 300 is provided between the second end of the valve port bracket 4 and the bottom of the gas distribution chamber 204. The valve port sealing ring 300 is provided in a one-to-one correspondence with the on / off valve port 203, and the valve port sealing ring 300 surrounds the outer side of the corresponding on / off valve port 203 and the vent valve port 411. This ensures that the valve port sealing ring 300 seals the outer periphery of the connection between the on / off valve port 203 and the vent valve port 411, guaranteeing the reliability of the valve core 2's sealing of the on / off valve port 203.

[0120] The bottom of the gas distribution chamber 204 has a sealing ring groove surrounding the on / off valve port 203a. A valve port sealing ring 300 is provided in the sealing ring groove. The sealing ring groove and the valve port sealing ring 300 facilitate the installation of the valve port sealing ring 300.

[0121] To improve the ease of connection between the electromagnetic mechanism 1 and the valve holder 4, a positioning protrusion 1522 is provided at the end of the electromagnetic mechanism 1. Multiple positioning protrusions 1522 are spaced around the center line of the coil assembly 112. The open end of the valve holder 4 is fitted over the outside of all the positioning protrusions 1522 and abuts against the end of the electromagnetic mechanism 1. All the positioning protrusions 1522 abut against the inner wall of the valve holder 4. By providing the positioning protrusions 1522, it is convenient to achieve the installation and positioning of the valve holder 4 on the electromagnetic mechanism 1, ensuring the reliability of the relative position between the valve holder 4 and the electromagnetic mechanism 1, and thus ensuring the reliability of the relative position between the valve holder 4 and the first valve core 2a and the second valve core 2b.

[0122] In other embodiments, the positioning protrusion 1522 has an annular structure coaxial with the coil group 112, and the open end of the valve port bracket 4 is sleeved on the outside of the positioning protrusion 1522 and abuts against the end of the electromagnetic mechanism 1.

[0123] Specifically, the outer magnetic plate 152 protrudes in a direction away from the inner magnetic plate 151 to form the aforementioned positioning protrusion 1522. The positioning protrusion 1522 preferably has an interference fit with the valve holder 4, thereby ensuring the coaxiality of the electromagnetic mechanism 1 and the valve holder 4.

[0124] The gas distributor 200 has a sealing groove at the opening plane of the mounting opening. The sealing groove surrounds the mounting opening, and a mounting sealing ring 400 is provided in the sealing groove. The mounting sealing ring 400 is sandwiched between the bottom of the sealing groove and the end of the electromagnetic mechanism 1 to ensure a seal at the mounting position. The mounting sealing ring 400 is preferably interference-fitted onto the outer wall of the valve port bracket 4 to further improve the sealing effect and to achieve compression of the valve port bracket 4, preventing the valve port bracket 4 from moving relative to the electromagnetic mechanism 1.

[0125] Example 5

[0126] This embodiment provides a solenoid valve 100 and a gas distribution device 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 configuration. This embodiment will not describe the structure that is the same as the above structure again.

[0127] like Figure 11 As shown, in this embodiment, three valve cores 2 are provided, namely a first valve core 2a, a second valve core 2b, and a third valve core. Three mounting shaft holes 121 are provided, namely a first shaft hole 121a, a second shaft hole 121b, and a third shaft hole. The third shaft hole is arranged side-by-side with the first and second shaft holes 121a and 121b. The solenoid valve 100 also includes a third valve core 2 and a third elastic element 3. One end of the third valve core 2 is slidably inserted into the third shaft hole, and the second end of the third valve core 2 has a third sealing cap 22 extending out of the third shaft hole. The third elastic element 3 is used to apply an elastic force to the third valve core 2 to move it away from the electromagnetic mechanism 1. The first valve core 2a, the second valve core 2b, and the third valve core are spaced apart around the center line of the electromagnetic mechanism 1.

[0128] The valve holder 4 is provided with three vent valve ports 411, namely the first vent valve port 411a, the second vent valve port 411b, and the third vent valve port 411c. The first vent valve port 411a, the second vent valve port 411b, and the third vent valve port 411c are spaced apart along the axis surrounding the valve holder 4. The valve core 2 controls the opening and closing of the corresponding vent valve ports 411.

[0129] When the electromagnetic mechanism 1 is in the first driving state and the second driving state, the third valve core 2 blocks the third vent valve port 411c. The electromagnetic mechanism 1 has a third driving state. When the electromagnetic mechanism 1 is in the third driving state, the electromagnetic mechanism 1 can drive the first valve core 2a, the second valve core 2b and the third valve core to move in the direction toward the electromagnetic mechanism 1.

[0130] The gas distribution seat 200 is provided with three gas distribution channels 202, and each gas distribution channel 202 is provided with an on / off valve port 203, which is connected to the corresponding air supply valve port 411. That is, the solenoid valve 100 provided in this embodiment can realize the on / off control of multiple gas distribution channels 202.

[0131] In this embodiment, three fixed iron cores 12 and three sleeves 13 are provided and are arranged in a one-to-one correspondence. The three fixed iron cores 12 are respectively provided with a first shaft hole 121a, a second shaft hole 121b and a third shaft hole. The three fixed iron cores 12 are arranged at intervals around the center line of the electromagnetic module.

[0132] In other embodiments, only one fixed iron core 12 and one sleeve 13 may be provided. The fixed iron core 12 is provided with a first shaft hole 121a, a second shaft hole 121b and a third shaft hole. The first shaft hole 121a, the second shaft hole 121b and the third shaft hole are arranged at intervals around the center line of the electromagnetic module. That is, the cooperation structure between the third valve core 2 and the electromagnetic mechanism 1 can be set with reference to Embodiment 1.

[0133] 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.

[0134] 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. An electromagnetic valve characterized by comprising: include: An electromagnetic mechanism (1) has at least two parallel and spaced mounting shaft holes (121) inside. The first end of each mounting shaft hole (121) is closed and the second end is open. The coil group (112) of the electromagnetic mechanism (1) surrounds the outside of all the mounting shaft holes (121). Multiple valve cores (2) are provided one-to-one with mounting shaft holes (121). The first end of the valve core (2) is slidably inserted into the corresponding mounting shaft hole (121), and the second end of the valve core (2) extends out of the mounting shaft hole (121) and has a sealing cap (22). Multiple elastic elements (3) are provided one-to-one with the valve core (2), and all the elastic elements (3) have different elastic moduli; when the electromagnetic mechanism (1) stops working, the elastic element (3) is used to reset the corresponding valve core (2).

2. The electromagnetic valve according to claim 1, characterized by The solenoid valve also includes a valve port frame (4), which is connected to the end of the solenoid mechanism (1). The valve port frame (4) has a valve cavity and is provided with a plurality of vent valve ports (411) communicating with the valve cavity. The vent valve ports (411) are provided in a one-to-one correspondence with the valve core (2). The side wall of the valve port frame (4) is provided with a side vent port (421) communicating with the valve cavity. All the sealing caps (22) are movably disposed inside the valve port frame (4) and can block or open the corresponding vent valve port (411).

3. The electromagnetic valve according to claim 2, characterized by The sealing cap (22) has a sealing ring (221) protruding from one end away from the electromagnetic mechanism (1). The sealing ring (221) can abut against the valve holder (4) to block the vent valve (411).

4. The electromagnetic valve according to claim 2, characterized by The valve holder (4) is a cylindrical structure with one end open. The bottom of the valve holder (4) is provided with the vent valve port (411). The end of the electromagnetic mechanism (1) is provided with a positioning protrusion (1522) protruding in the direction toward the sealing cap (22). The positioning protrusion (1522) is a ring structure, and the open end of the valve holder (4) is sleeved on the outside of the positioning protrusion (1522) and abuts against the end of the electromagnetic mechanism (1); or, the positioning protrusion (1522) is arranged in multiple intervals around the center line of the coil group (112), and all the positioning protrusions (1522) abut against the inner sidewall of the valve holder (4).

5. The electromagnetic valve according to claim 1, characterized by Each valve core (2) includes a valve shaft (21), the first end of which is slidably inserted into the corresponding mounting shaft hole (121), and the second end of the valve core (2) is connected to the corresponding sealing cap (22); All the valve shafts (21) are the same size; and / or, the elastic element (3) is sleeved on the outside of the corresponding valve shaft (21) and its two ends abut against the sealing cap (22) and the electromagnetic mechanism (1), respectively.

6. The electromagnetic valve according to claim 1, characterized by The electromagnetic mechanism (1) has a plurality of sleeves (13) installed inside the coil group (112), the plurality of sleeves (13) being spaced apart around the central axis of the coil group (112), and the inner cavity of the sleeves (13) forming the mounting shaft hole (121); Alternatively, the electromagnetic mechanism (1) has a fixed iron core (12) installed inside the coil group (112), and the fixed iron core (12) has a plurality of mounting shaft holes (121) arranged at intervals around the center line of the coil group (112). Alternatively, the electromagnetic mechanism (1) has a fixed iron core (12) installed inside the coil group (112), and multiple fixed iron cores (12) are spaced around the central axis of the coil group (112), and each fixed iron core (12) is provided with the mounting shaft hole (121).

7. The electromagnetic valve according to any one of claims 1 to 6, characterized by The elastic element (3) is used to apply an elastic force to the corresponding valve core (2) to move it away from the electromagnetic mechanism (1).

8. A gas distribution apparatus, characterized by, include: The air distribution seat (200) has an air distribution chamber (204), an air inlet channel (201) communicating with the air distribution chamber (204), and a plurality of air distribution channels (202) communicating with the air distribution chamber (204). The air inlet port of the air distribution channel (202) forms an on / off valve port (203). The solenoid valve as described in claim 1, 5, 6 or 7 is installed on the gas distribution seat (200) and the valve core (2) is provided in a one-to-one correspondence with the on / off valve port (203), and the sealing cap (22) of the valve core (2) can open or close the corresponding on / off valve port (203).

9. The gas distribution device of claim 8, wherein, The bottom of the gas distribution chamber (204) is provided with a sealing protrusion (205) surrounding the on / off valve port (203). The sealing protrusion (205) is provided in a one-to-one correspondence with the on / off valve port (203). The sealing cap (22) can abut against the corresponding sealing protrusion (205) to block the on / off valve port (203). Alternatively, the sealing cap (22) may have a sealing ring (221) protruding from one end away from the electromagnetic mechanism (1), and the sealing ring (221) may abut against the bottom of the gas distribution chamber (204) to block the on / off valve port (203).

10. A gas distribution apparatus, characterized by, include: The air distribution seat (200) has an air distribution chamber (204), an air inlet channel (201) communicating with the air distribution chamber (204), and a plurality of air distribution channels (202) communicating with the air distribution chamber (204). The air inlet port of the air distribution channel (202) forms an on / off valve port (203). The solenoid valve as described in any one of claims 2-4, wherein the solenoid mechanism (1) is installed on the outside of the gas distribution seat (200), the valve port bracket (4) is located between the bottom of the gas distribution chamber (204) and the solenoid mechanism (1), the side vent (421) connects the gas distribution chamber (204) and the valve chamber, and the on / off valve port (203) and the vent valve port (411) are arranged opposite to each other and connected; A valve port sealing ring (300) is sandwiched between the bottom of the gas distribution chamber (204) and the valve port frame (4). The valve port sealing ring (300) is provided in a one-to-one correspondence with the on / off valve port (203) and surrounds the outside of the corresponding on / off valve port (203) and the vent valve port (411).

11. The gas distribution device of claim 10, wherein, The bottom of the gas distribution chamber (204) is provided with a sealing ring groove. The sealing ring groove is provided in a one-to-one correspondence with the on / off valve port (203) and surrounds the on / off valve port (203). The valve port sealing ring (300) is installed in the sealing ring groove and squeezed between the bottom of the sealing ring groove and the valve port frame (4).

12. The gas distribution device of claim 10, wherein, The gas distribution seat (200) is provided with a sealing groove around the opening of the gas distribution chamber (204). A sealing ring (400) is installed in the sealing groove. The sealing ring (400) is interference-fitted onto the outer wall of the first side of the valve holder (4), and the sealing ring (400) is pressed between the bottom of the sealing groove and the end of the electromagnetic mechanism (1).

13. A gas water heating apparatus, characterised in that, Includes the gas distribution device as described in any one of claims 8-12.

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