A lever type electromagnetic valve

Abstract

This invention relates to a lever-type solenoid valve, comprising a valve port, a coil, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a sealing block, and a second valve-closing elastic element. The first magnetic conductor is inserted into the coil, with both ends extending beyond the coil. The second magnetic conductor is fixed to a first end of the first magnetic conductor. The sealing block is disposed at the first end of the third magnetic conductor, with the second end of the third magnetic conductor connected to the second end of the first magnetic conductor, and the first end of the third magnetic conductor is suspended. When the coil is energized, the first end of the third magnetic conductor is attracted to the second magnetic conductor, and the sealing block is in an open position away from the valve port. The second valve-closing elastic element can apply an elastic force to the first end of the third magnetic conductor. This solenoid valve can be opened with low voltage and can maintain the valve open under low power consumption conditions, thereby improving operational reliability and safety.

Description

[0001] This application is a divisional application of the Chinese invention patent filed on December 27, 2024, with application number 2024119598400 and titled "A Gas Valve and Gas Control System". Technical Field

[0002] This invention relates to the field of solenoid valve technology, and more specifically to a lever-type solenoid valve. Background Technology

[0003] The electronic intelligent gas valve has a constant flame valve at the valve body inlet. By manually opening the constant flame valve, gas can flow into the valve chamber between the first and second main valves. After pressure regulation and stabilization, it is delivered to the constant flame burner for combustion. The constant flame burner is equipped with a thermopile. After being heated, the thermopile generates electricity and supplies the electrical energy to the electronic controller. The electronic controller controls the opening of the pilot valve of the first main valve, thereby opening the differential pressure valve of the first main valve. Gas is continuously supplied to the constant flame burner through the first main valve. The electronic controller controls the opening or closing of the second main valve according to the actual temperature of the heated medium to supply gas to the main furnace burner. The second main valve has a similar structure to the first main valve, both of which are differential pressure valves. The pilot valve affects the reliability and safety of the operation. Summary of the Invention

[0004] The purpose of this invention is to provide a lever-type solenoid valve to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides a lever-type solenoid valve, comprising a valve port, a coil, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a sealing block, and a second valve-closing elastic element;

[0006] The first magnetic conductor is inserted into the coil, with both ends of the first magnetic conductor extending out of the coil. The second magnetic conductor is fixed to the first end of the first magnetic conductor. The sealing block is disposed at the first end of the third magnetic conductor. The second end of the third magnetic conductor is connected to the second end of the first magnetic conductor. The first end of the third magnetic conductor is suspended.

[0007] When the coil is energized, the first end of the third magnetic conductor is attracted to the second magnetic conductor, and the sealing block is in the open position away from the valve port;

[0008] The second valve-closing elastic element can apply an elastic force to the first end of the third magnetic conductor to move the sealing block in the direction of closing the valve port.

[0009] The lever-type solenoid valve provided by this invention, when a certain voltage is applied to the electromagnetic coil, generates an electromagnetic force that causes the first end of the third magnetic conductor to attract the second magnetic conductor, thereby opening the valve. This solenoid valve utilizes the lever principle to save effort, can open the valve with low voltage, and can maintain the valve in an open state under low power consumption conditions. It can be used as a pilot valve in a pilot-operated solenoid valve to control the opening of the main valve, and is suitable for thermocouple ultra-low power supply environments, thereby improving the reliability and safety of operation. Attached Figure Description

[0010] Figure 1 This is a cross-sectional schematic diagram of a gas control system provided in one embodiment of this application;

[0011] Figure 2 for Figure 1 A cross-sectional schematic diagram of the gas valve shown;

[0012] Figure 3 for Figure 2 A magnified view of the location of the first valve group in the middle;

[0013] Figure 4 for Figure 2 A partial enlarged view of the location of the pilot valve assembly in the second valve group;

[0014] Figure 5 for Figure 4 A magnified view of the J2 section;

[0015] Figure 6 for Figure 2 A magnified view of a portion of the J1 area;

[0016] Figure 7 This is a partial schematic diagram of the replacement scheme for the connection between the connecting rod and the valve body.

[0017] Explanation of reference numerals in the attached figures:

[0018] Gas valve 10, electronic controller 20, thermopile 30, constant open flame burner 40, main furnace burner 50, igniter 60, temperature sensor 70, water tank 80, knob 90, connecting rod 91, capillary tube 100.

[0019] Valve body 11, air inlet channel 111, first valve chamber 112, second valve chamber 113, air outlet 1131, first valve port 114, second valve port 115, first flow channel 116, second flow channel 117, third flow channel 118, connecting hole 1191, mounting groove 1192, second sealing ring 1193, diaphragm 1193', end cap 1194;

[0020] First valve group 12, coil assembly 121, coil 1211, magnetic conductive element 1212, first magnetic conductive part 12121, second magnetic conductive part 12122, stationary iron core 122, moving iron core 123, sealing element 124, first valve closing elastic element 125, support element 126.

[0021] Second valve assembly 13, differential pressure valve assembly 13A, back pressure chamber 1321, differential pressure diaphragm assembly 1322, differential pressure elastic element 1323, differential pressure valve plug 1324, pilot valve assembly 13B, pilot valve seat 133, pilot valve chamber 1331, throttling orifice 1332, pilot valve port 1333, pilot valve coil 134, coil body 1341, coil support 1342, snap-fit ​​part 13421, boss 13422, first magnetic conductor 135, first magnetic section 1351, second magnetic section 1352, snap hole 13521, insertion hole 13522, second magnetic conductor 136, third magnetic conductor 137, bending section 1371, limiting part 1372, sealing block 138, second closing valve elastic element 139, pre-compression elastic element 1310;

[0022] Pressure regulating valve 14, constant open flame pressure stabilizing device 16. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The directional terms "upper" (top), "lower" (bottom), etc., used in this document are defined based on the location of components in the accompanying drawings or their relative positions, and are merely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection of this application.

[0025] For ease of understanding and concise description, the following explanation will be combined with the gas valve and the gas control system with the gas valve, and the beneficial effects will not be discussed again.

[0026] Please refer to Figure 1 and Figure 2 , Figure 1 This is a cross-sectional schematic diagram of a gas control system provided in one embodiment of this application; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the gas valve. Figure 1 and Figure 2 The dashed lines in the diagram indicate structures that cannot be visually displayed. Figure 1 The double-dotted lines in the diagram represent control circuits or electrical control circuits.

[0027] In this embodiment, the gas control system includes a gas valve 10, a thermopile 30, a constant flame burner 40, and a main furnace burner 50. The constant flame burner 40 is located beside the main furnace burner 50 so that the flame of the constant flame burner 40 can ignite the main furnace burner 50. The thermopile 30 is located next to the constant flame burner 40, and after the constant flame burner 40 is ignited, the thermopile 30 can be heated to generate electricity.

[0028] The gas valve 10 has a first gas supply path and a second gas supply path. The first gas supply path can be used to supply gas to the constant flame burner 40, and the second gas supply path can be used to supply gas to the main furnace burner 50. It can be understood that the constant flame burner 40 can only be ignited when gas is supplied to it, and the burning constant flame burner 40 can only ignite the main furnace burner 50 when gas is supplied to it.

[0029] The gas valve 10 has a first valve port 114 on its first gas supply path and a second valve port 115 on its second gas supply path. That is, the first valve port 114 is located in both the first and second gas supply paths, or in other words, the first and second gas supply paths have overlapping path portions, and the first valve port 114 is located in the overlapping path portion.

[0030] The gas valve 10 includes a first valve group 12 and a second valve group 13. The first valve group 12 is used to open or close the first valve port 114, and the second valve group 13 is used to open or close the second valve port 115. When the first valve group 12 is in the position of closing the first valve port 114, the first gas supply path is cut off, and gas cannot be delivered to the constant flame burner 40. When the first valve group 12 is in the position of opening the first valve port 114, the first gas supply path is opened, and gas can be delivered to the constant flame burner 40. When at least one of the first valve group 12 and the second valve group 13 is in the position of closing the corresponding valve port, the second gas supply path is cut off, and gas cannot be delivered to the main furnace burner 50. When both the first valve group 12 and the second valve group 13 are in the position of opening the corresponding valve ports, the second gas supply path is opened, and gas can be delivered to the main furnace burner 50.

[0031] The gas control system may also include an electronic controller 20, which can be used to control the on / off state of the power supply circuit of the first valve group 12 and the power supply circuit of the second valve group 13. The aforementioned thermopile 30 located in the constant flame burner 40 can be used to power the electronic controller 20, the first valve group 12, and the second valve group 13.

[0032] In the gas valve 10 of this gas control system, the first valve group 12 is a direct-acting solenoid valve. The structure of the first valve group 12 is configured such that it can remain in the open position of the first valve port 114 when energized, and it can be manually opened. The first valve group 12, as a single valve component, can control the opening or closing of the first gas supply path to the constant flame burner 40. This simplifies the structure of the gas valve 10, reduces the number of valve components and sealing parts, lowers the probability of gas leakage, and thus improves the operational reliability of the gas valve.

[0033] The first valve group 12 can have various structural forms, which will be combined below. Figure 3 This paper details a first valve assembly 12 that has a relatively simple structure and high reliability. Figure 3 It shows Figure 2 A magnified view of the location of the first valve group.

[0034] In this embodiment, the first valve assembly 12 includes a coil assembly 121, a stationary iron core 122, a moving iron core 123, and a sealing element 124. At least a portion of the stationary iron core 122 is fixedly inserted into the coil assembly 121, and at least a portion of the moving iron core 123 is slidably inserted into the coil assembly 121. The sealing element 124 is disposed at the end of the moving iron core 123 away from the stationary iron core 122. When the coil assembly 121 is energized, the moving iron core 123 and the stationary iron core 122 are attracted together, and the sealing element 124 is in the open position away from the first valve port 114. Thus, the first valve assembly 12 requires relatively less electrical energy.

[0035] by Figure 2 and Figure 3 As shown, the first valve group 12 is located below the first valve port 114. The lower end of the moving iron core 123 is slidably inserted into the coil assembly 121, and the upper end of the moving iron core 123 is connected to the sealing member 124. After the coil assembly 121 is energized, under the action of the magnetic field, the moving iron core 123 moves downward to attract with the stationary iron core 122, thereby driving the sealing member 124 to move downward and open the first valve port 114.

[0036] In a specific implementation, the coil assembly 121 can be located on the outside of the valve body 11 of the gas valve 10. This avoids occupying the internal space of the valve body 11 and helps to reduce the size of the gas valve 10.

[0037] To ensure sealing, the coil assembly 121 and the valve body 11 are sealed together, which can be achieved by using a sealing ring or a sealing gasket.

[0038] The moving iron core 123 is equipped with a seal 124 at one end, that is, the upper end of the moving iron core 123 is located inside the valve body 11, so as to ensure that the seal 124 can realize the function of opening or closing the first valve port 114.

[0039] The first valve assembly 12 also includes a first valve-closing elastic element 125, which is disposed between the sealing element 124 and the valve body 11. Thus, when the coil assembly 121 is energized, the moving iron core 123 drives the sealing element 124 downward to open the first valve port 114. At this time, the first valve-closing elastic element 125 accumulates elastic deformation energy. After the coil assembly 121 is de-energized, the magnetic attraction between the moving iron core 123 and the stationary iron core 122 disappears. Under the action of the elastic deformation energy accumulated in the first valve-closing elastic element 125, the moving iron core 123 can drive the sealing element 124 upward to the valve-closing position where the sealing element 124 closes the first valve port 114. In practical applications, when the coil assembly 121 is unexpectedly de-energized, the first valve assembly 12 can be reset to the valve-closing position under the action of the first valve-closing elastic element 125, cutting off the gas supply to the constant flame burner 40 in the gas valve 10 and ensuring the safety of the gas valve 10.

[0040] In other embodiments, the first valve elastic element 125 may also be disposed between the seal 124 and the coil assembly 121.

[0041] In a specific implementation, the coil assembly 121 may include a coil 1211 and a magnetic conductor 1212. The coil 1211 has insertion holes for inserting a stationary iron core 122 and a moving iron core 123. As shown in the figure, the axial orientation of the insertion holes of the coil 1211 is the vertical direction. The coil 1211 includes a first end face and a second end face opposite each other in the axial direction of the insertion holes; that is, the coil 1211 includes an upper end face and a lower end face. The magnetic conductor 1212 is located on the coil 1211. The outer periphery of the magnetic conductive element 1212 includes a first magnetic conductive part 12121 and a second magnetic conductive part 12122. The first magnetic conductive part 12121 is in contact with the upper end face of the coil 1211, and the second magnetic conductive part 12122 is in contact with the lower end face of the coil 1211. The magnetic conductive element 1212 may also include a connecting magnetic conductive part that connects the first magnetic conductive part 12121 and the second magnetic conductive part 12122. In the cross-sectional view shown in the figure, the cross-section of the magnetic conductive element 1212 is approximately U-shaped.

[0042] The above-described structure of the coil assembly 121 is beneficial to improving magnetic transmission efficiency and can relatively reduce current consumption, thereby achieving energy-saving effects.

[0043] The first valve assembly 12 is applied to the gas valve 10. By supplying a relatively low amount of electrical energy to the first valve assembly 12, the gas valve 10 can keep the first valve assembly 12 in the open position of the first valve port 114, thus ensuring that the path for supplying gas to the open flame burner remains continuous. This expands the options for the electrical supply of the gas valve 10. Furthermore, the structure of the first valve assembly 12 can accommodate the opening and closing control of a larger diameter first valve port 114.

[0044] In practice, the sealing element 124 can be made of rubber, which has a certain elasticity and can fit well with the first valve port 114 to form a seal, thus reducing the processing requirements of the first valve port 114.

[0045] The first valve assembly 12 also includes a support member 126, which is sleeved outside the moving iron core 123 and supports the sealing member 124. This prevents the sealing member 124 from deforming and failing to properly cooperate with the first valve port 114.

[0046] In application, the seal 124 can be fixedly connected to the support 126. For example, the seal 124 can be molded onto the support 126 by vulcanization. In the illustrated example, the seal 124 has a roughly T-shaped cross-section, the support 126 has a roughly basin-shaped structure, and the lower part of the seal 124 can be inserted into the support 126 to provide a better limiting effect for the seal 124.

[0047] In other embodiments, the first valve assembly 12 may also employ other relatively low-energy-consumption solenoid valves, not limited to those shown in the figure.

[0048] See again Figure 1 and Figure 2 The gas valve 10 includes a valve body 11, and the aforementioned first gas supply path and second gas supply path are basically formed on the valve body 11.

[0049] like Figure 2 As shown, the valve body 11 has an air inlet channel 111, a first valve chamber 112, a second valve chamber 113, and a first flow channel 116. The air inlet channel 111 is connected to the first valve chamber 112 through the aforementioned first valve port 114. One end of the first flow channel 116 is connected to the first valve chamber 112, and the other end of the first flow channel 116 is used to connect to the constant flame burner 40. The first valve chamber 112 is connected to the second valve chamber 113 through the aforementioned second valve port 115. The second valve chamber 113 has an air outlet 1131, which is used to connect to the main furnace burner 50.

[0050] like Figure 1 As shown, the other end of the first flow channel 116 can be connected to the open flame burner 40 via a capillary tube 100. The gas outlet 1131 of the second valve chamber 113 can be connected to the main furnace burner 50 via a gas pipeline.

[0051] Thus, the first gas supply path of the gas valve 10 includes an intake channel 111, a first valve chamber 112, and a first flow channel 116, and the second gas supply path of the gas valve 10 includes an intake channel 111, a first valve chamber 112, and a second valve chamber 113.

[0052] In this embodiment, a constant flame pressure stabilizing device 16 is installed on the valve body 11 of the gas valve 10. The constant flame pressure stabilizing device 16 is located between the first valve chamber 112 and the first flow channel 116, that is, the constant flame pressure stabilizing device 16 is located upstream of the first flow channel 116. The gas entering the first valve chamber 112 first passes through the constant flame pressure stabilizing device 16 for pressure regulation before entering the first flow channel 116 to ensure safety.

[0053] In this embodiment, the second valve assembly 13 for opening or closing the second valve port 115 includes a differential pressure valve assembly 13A and a pilot valve assembly 13B. The thermopile 30 of the gas control system can supply power to the pilot valve assembly 13B, which controls the operation of the differential pressure valve assembly 13A to open or close the second valve port 115.

[0054] The differential pressure valve assembly 13A is located within the first valve chamber 112. The differential pressure valve assembly 13A includes a back pressure chamber 1321, a differential pressure diaphragm assembly 1322, a differential pressure elastic element 1323, and a differential pressure valve plug 1324. The differential pressure diaphragm assembly 1322 can drive the differential pressure valve plug 1324 to open or close the second valve port 115. In the illustrated example, the differential pressure valve plug 1324 is integrated onto the differential pressure diaphragm assembly 1322. Figure 2 As shown, the upper part of the differential pressure diaphragm assembly 1322 is the second valve port 115, and the lower part is the back pressure chamber 1321. The upper part of the differential pressure diaphragm assembly 1322 is subjected to pressure from the first valve chamber 112. By adjusting the differential pressure force on the upper and lower sides of the differential pressure diaphragm assembly 1322, the differential pressure valve plug 1324 can be moved closer to or away from the second valve port 115 to close or open the second valve port 115. A differential pressure elastic element 1323 is provided below the differential pressure diaphragm assembly 1322 to realize the reset of the differential pressure valve plug 1324.

[0055] The pilot valve assembly 13B can be used to adjust the pressure of the back pressure chamber 1321 of the differential pressure valve assembly 13A, thereby adjusting the pressure on both sides of the differential pressure diaphragm assembly 1322, and thus realizing the opening and degree adjustment of the second valve port 115.

[0056] The pilot valve assembly 13B can have various structural forms, which are described below. Figure 4 and Figure 5 This paper introduces a specific implementation method of a pilot valve assembly 13B.

[0057] In this embodiment, the pilot valve assembly 13B includes a pilot valve seat 133, which has a pilot valve cavity 1331, a throttling orifice 1332, and a pilot valve port 1333. The throttling orifice 1332 and the pilot valve port 1333 are both connected to the pilot valve cavity 1331.

[0058] The gas valve 10 has a second flow channel 117 and a third flow channel 118. The inlet end of the second flow channel 117 is connected to the pilot valve port 1333, and the outlet end of the second flow channel 117 is connected to the second valve chamber 113. The third flow channel 118 connects the pilot valve chamber 1331 and the back pressure chamber 1321 of the differential pressure valve assembly 13A.

[0059] The pilot valve assembly 13B is an electromagnetic pilot valve. The pilot valve assembly 13B is configured such that when energized, the pilot valve port 1333 can be opened, and when de-energized, the pilot valve port 1333 can be closed.

[0060] When the pilot valve assembly 13B is not energized, the second flow channel 117 is cut off because the pilot valve port 1333 is closed. The gas entering the pilot valve chamber 1331 from the first valve chamber 112 through the throttle port 1332 cannot flow into the second flow channel 117. The gas entering the pilot valve chamber 1331 will flow into the back pressure chamber 1321 of the differential pressure valve assembly 13A through the third flow channel 118. At this time, the upper pressure and lower pressure of the differential pressure diaphragm group 1322 of the differential pressure valve assembly 13A are balanced. Under the action of the differential pressure elastic element 1323, the differential pressure diaphragm group 1322 drives the differential pressure valve plug 1324 to remain in the closed position with the second valve port 115 closed.

[0061] When the pilot valve assembly 13B is energized, the pilot valve port 1333 is opened, and the gas flowing into the pilot valve chamber 1331 can flow into the second flow channel 117 through the pilot valve port 1333 and flow to the second valve chamber 113. In this way, the amount of gas flowing into the back pressure chamber 1321 is reduced, and a pressure difference can be established on both sides of the differential pressure diaphragm group 1322 of the differential pressure valve assembly 13A to drive the differential pressure valve plug 1324 to open the second valve port 115, so that the gas can enter the second valve chamber 113 from the first valve chamber 112 through the second valve port 115, and flow from the second valve chamber 113 to the main furnace burner 50.

[0062] In this embodiment, the pilot valve assembly 13B further includes a pilot valve coil 134, a first magnetic conductor 135, a second magnetic conductor 136, a third magnetic conductor 137, a sealing block 138, and a second valve closing elastic element 139.

[0063] The first magnetic conductor 135 is inserted into the valve coil 134, and both ends of the first magnetic conductor 135 extend out of the valve coil 134. The second magnetic conductor 136 is fixed to the first end of the first magnetic conductor 135. The sealing block 138 is disposed at the first end of the third magnetic conductor 137. The second end of the third magnetic conductor 137 is connected to the second end of the first magnetic conductor 136. The first end of the third magnetic conductor 137 is suspended.

[0064] When the pilot valve coil 134 is energized, the first end of the third magnetic conductor 137 is attracted to the second magnetic conductor 136, and the sealing block 138 is in the open position away from the pilot valve port 1333.

[0065] The second valve elastic element 139 can apply an elastic force to the first end of the third magnetic conductor 137, so that the sealing block 138 moves toward the closing pilot valve port 1333.

[0066] As described above, the pilot valve assembly 13B is a lever-type pilot valve. The first end of the third magnetic conductor 137 is suspended. After the pilot valve coil 134 is energized, under the action of magnetic force, the first end of the third magnetic conductor 137 can move towards the second magnetic conductor 136 to engage with the second magnetic conductor 136, thereby driving the sealing block 138 away from the pilot valve port 1333 to open the pilot valve port 1333. After the pilot valve coil 134 is de-energized, under the action of the second valve closing elastic element 139, the first end of the third magnetic conductor 137 moves away from the second magnetic conductor 136 to drive the sealing block 138 towards the pilot valve port 1333 and reset to the valve closing position of the pilot valve port 1333.

[0067] by Figure 2 and Figure 4 As shown, the first magnetic conductor 135 is inserted through the pilot valve coil 134 in the left-right direction. The left end of the first magnetic conductor 135 extends out of the pilot valve coil 134, and the left end of the first magnetic conductor 135 is its first end. The second magnetic conductor 136 is fixed to the left end of the first magnetic conductor 135. The right end of the first magnetic conductor 135 extends out of the pilot valve coil 134, and the right end of the first magnetic conductor 135 is its second end.

[0068] The third magnetic conductor 137 extends roughly in the left-right direction. The left end of the third magnetic conductor 137 is its first end, and the right end of the third magnetic conductor 137 is its second end. The right end of the third magnetic conductor 137 is connected to the right end of the first magnetic conductor 135, and the left end of the third magnetic conductor 137 is connected to a sealing block 138.

[0069] The sealing block 138 is located to the left of the second magnetic conductor 136, and the valve coil 134 is located to the right of the second magnetic conductor 136.

[0070] The third magnetic conductor 137 is located above the second magnetic conductor 136, and the sealing block 138 is located below the valve port 1333.

[0071] As set up above, when the magnetic coil 134 is energized, the coil is energized and a gap magnetic flux is formed through the first magnetic body 135, the third magnetic body 137 and the second magnetic body 136. Under the action of the second valve closing elastic element 139, there is a gap between the third magnetic body 137 and the second magnetic body 136. Through magnetic force, the movable end of the third magnetic body 137, that is, its first end, can be moved towards the second magnetic body 136 to attract each other, thereby driving the sealing block 138 to open the pilot valve port 1333.

[0072] In a specific implementation, the pilot valve coil 134 includes a coil body 1341 and a coil support 1342, with the coil body 1341 wound around the outer periphery of the coil support 1342. The first magnetic conductor 135 includes a bent first magnetic conductor segment 1351 and a second magnetic conductor segment 1352. The first magnetic conductor segment 1351 is inserted into the coil support 1342, and the end of the first magnetic conductor segment 1351 away from the second magnetic conductor segment 1352 is fixedly connected to the second magnetic conductor 136. The coil support 1342 is fixedly connected to the second magnetic conductor segment 1352.

[0073] This ensures the stability of the relative position between the valve coil 134 and the first magnetic conductor 135, and also facilitates the connection and cooperation between the first magnetic conductor 135 and the third magnetic conductor 137.

[0074] For example, the second magnetic conductor 136 can be in the form of an iron core.

[0075] For example, the second magnetic conductor 136 can be fixedly connected to the first magnetic conductor segment 1351 by riveting.

[0076] The second magnetic conductor segment 1352 may be provided with a locking hole 13521, and the coil support 1342 may be provided with a locking part 13421, which is fitted into the locking hole 1352. The coil support 1342 and the second magnetic conductor segment 1352 may also be fixed by other means, such as riveting.

[0077] The first magnetic conductor 135 is roughly L-shaped. The second magnetic section 1352 of the first magnetic conductor 135 is located outside the magnetic coil 134. The second magnetic section 1352 is bent upward to facilitate connection with the third magnetic conductor 137 located above.

[0078] In a specific implementation, the second magnetic section 1352 has a socket 13522, the second end of the third magnetic body 137 passes through the socket 13522, and the third magnetic body 137 is provided with a first limiting structure, which is used to limit the position of the third magnetic body 137 relative to the second magnetic section 1352 in the direction away from the sealing block 138; the pilot valve assembly 13B also includes a second limiting structure, which is used to limit the position of the third magnetic body 137 relative to the second magnetic section 1352 in the direction closer to the sealing block 138.

[0079] As shown in the diagram, the second end of the third magnetic conductor 137 is inserted into the insertion hole 13522 of the second magnetic conductor section 1352 in a roughly left-right direction. The first limiting structure is used to prevent the third magnetic conductor 137 from moving excessively to the right, and the second limiting structure is used to prevent the third magnetic conductor 137 from moving excessively to the left. Under the action of the first limiting structure and the second limiting structure, the position of the third magnetic conductor 137 can be ensured, thereby ensuring that the sealing block 138 connected to the third magnetic conductor 137 can correspond to the position of the pilot valve port 1333, and ensuring the reliability of the pilot valve assembly 13B.

[0080] In one implementation, the third magnetic conductor 137 is provided with a limiting surface 1372 facing away from the direction of the sealing block 138, and the limiting surface 1372 can abut against the second magnetic section 1352; the first limiting structure includes the limiting surface 1372.

[0081] For example, the thickness of the third magnetic conductor 137 on the left side of the second magnetic section 1352 (referring to the vertical dimension in the figure) can be greater than the thickness of the portion that is inserted into the socket 13522, so that the aforementioned limiting surface 1372 can be formed to abut and limit the second magnetic section 1352.

[0082] For example, a stop protrusion can also be fixed on the third magnetic conductor 137, and the stop protrusion forms a limiting face facing the face of the second magnetic conductor segment 1352.

[0083] In one implementation, the second end of the third magnetic conductor 137 is provided with a bent section 1371, which is located on the side of the second magnetic conductor 1352 away from the sealing block 138. The coil support 1342 is provided with a boss 13422 facing the third magnetic conductor 137. The boss 13422 is arranged inclined away from the sealing block 138. A pre-compression elastic member 1310 is provided between the boss 13422 and the bent section 1371. The second limiting structure includes the bent section 1371, the boss 13422 and the pre-compression elastic member 1310.

[0084] like Figure 4 and Figure 5 As shown, since the boss 13422 faces the third magnetic conductor 137 and is inclined away from the sealing block 138, the pre-compression elastic member 1310 provided between the bending section 1371 and the boss 13422 is also inclined to the right. In this way, the elastic force applied by the pre-compression elastic member 1310 to the third magnetic conductor 137 can keep the third magnetic conductor 137 in the position where the limiting face 1372 abuts against the second magnetic conductor section 1352 and is in close contact with the top wall of the insertion hole 13522, thereby ensuring the reliability of the fit between the sealing block 138 and the valve port 1333.

[0085] like Figure 2As shown, in this embodiment, the pilot valve assembly 13B is located inside the valve body 11, and the pilot valve seat 133 of the pilot valve assembly 13B is an integral part of the valve body 11. This simplifies the assembly process of the gas valve 10 and also helps to reduce the volume occupied by the gas valve 10.

[0086] In other embodiments, the pilot valve assembly 13B may also be located outside the valve body 11, or the pilot valve seat 133 may also be a separate structure from the valve body 11.

[0087] The aforementioned second flow channel 117 may be formed on the valve body 11, or it may be partially formed on the valve body 11 and partially formed on the pilot valve seat 133; the aforementioned third flow channel 118 may be formed on the valve body 11, or it may be partially formed on the valve body 11 and partially formed on the pilot valve seat 133.

[0088] In this embodiment, the gas valve 10 also includes a pressure regulating valve 14, which is located on the second flow channel 117. That is, the gas entering the second flow channel 117 flows through the pressure regulating valve 14, and after being regulated and stabilized by the pressure regulating valve 14, it flows into the second valve chamber 113, and finally flows into the main furnace burner 50 from the gas outlet 1131.

[0089] The pressure regulating valve 14 can be set to adjust the gas flow rate, so that the differential pressure valve assembly 13A maintains a certain opening to meet the outlet pressure setting requirements.

[0090] The pressure regulating valve 14 can adopt existing mature solutions, which will not be elaborated here.

[0091] In the application environment of the gas valve 10, the first valve group 12 can be opened manually. In actual operation, force can be applied to the moving iron core 123 to move the sealing element 124 downward, thereby opening the first valve port 114. After the first valve port 114 is opened, the aforementioned first gas supply path of the gas valve 10 is connected, and gas can be supplied to the constant flame burner 40. After the constant flame burner 40 is ignited, the thermopile 30 of the gas control system can be heated to generate electrical energy. The electrical energy generated by the thermopile 30 can supply power to the first valve group 12, energizing its coil assembly 121. In this way, the first valve group 12 can be kept in the open position with the first valve port 114 open.

[0092] like Figure 2 As shown, the gas valve 10 may be equipped with a connecting rod 91. One end of the connecting rod 91 is inserted into the valve body 11 and abuts against the moving iron core 123 of the first valve assembly 12. The other end of the connecting rod 91 extends outside the valve body 11 for easy manual operation. In this way, the user can apply force to the moving iron core 123 by pressing the connecting rod 91 at one end outside the valve body 11, thereby causing the moving iron core 123 to drive the sealing element 124 to move in the valve opening direction.

[0093] A knob 90 can be connected to one end of the connecting rod 91 outside the valve body 11 for easy operation.

[0094] A sealing structure is provided at the connection between the connecting rod 91 and the valve body 11 to ensure sealing and prevent gas leakage.

[0095] Please refer to Figure 6 , Figure 6 for Figure 2 A magnified view of the J1 section.

[0096] In one implementation of the above-mentioned sealing structure, combined with Figure 2 and Figure 6 The gas valve 10 has a connecting hole 1191 on its valve body 11. The upper end of the connecting rod 91 can pass through the connecting hole 1191 and extend out of the valve body 11. The valve body 11 has a mounting groove 1192 above the connecting hole 1191. A second sealing ring 1193 is provided in the mounting groove 1192. The connecting rod 91 passes through the second sealing ring 1193. An end cap 1194 is fixedly connected above the mounting groove 1192 to limit the position of the second sealing ring 1193.

[0097] Please refer to Figure 7 , Figure 7 This is a partial schematic diagram of the replacement scheme for the connection between the connecting rod and the valve body.

[0098] In another implementation of the above-mentioned sealing structure, a diaphragm 1193' is fitted onto one end of the connecting rod 91 that extends out of the valve body 11. The inner ring of the diaphragm 1193' is airtightly connected to the connecting rod 91, and the outer ring of the diaphragm 1193' is located in the mounting groove 1192 of the valve body 11 and is positioned by pressing against the end cap 1194 fixed to the valve body 11. The inner and outer rings of the diaphragm 1193' are connected by an elastic structure to ensure that the connecting rod 91 can move axially along the first valve assembly 12.

[0099] In practical applications, the end of the connecting rod 91 located inside the valve body 11 can either contact only the moving iron core 123 of the first valve group 12, or it can be fixedly connected to the moving iron core 123.

[0100] See again Figure 1 and Figure 2After the gas control system is equipped with the aforementioned gas valve 10, in actual application, the user can manually open the first valve group 12 to open the first gas supply path, so that gas can be supplied to the constant flame burner 40. The user ignites the constant flame burner 40, and the thermopile 30 located in the constant flame burner 40 is heated to generate electricity and supply electrical energy to the first valve group 12, so that the first valve group 12 is in the energized state, and the first valve port 114 is kept in the open state to supply gas to the constant flame burner 40. The thermopile 30 also supplies power to the electronic controller 20. After being powered on, the electronic controller 20 determines whether to activate the power supply circuit of the second valve group 13 according to user settings. When the electronic controller 20 activates the power supply circuit of the second valve group 13, the second valve group 13 is in the open position (second valve port 115). Since the first valve group 12 is already in the open position, the second gas supply path is open, and gas can be supplied to the main furnace burner 50 through the first valve port 114 and the second valve port 115. The normally lit burner 40, located beside the main furnace burner 50, can ignite the gas supplied to the main furnace burner 50. When the electronic controller 20 cuts off the power supply circuit of the second valve group 13, the second valve group 13 is in the closed position (second valve port 115), the second gas supply path is cut off, and the main furnace burner 50 stops burning.

[0101] The gas control system utilizes a combination of a constant-flame burner 40 and a thermoelectric stack 30 to achieve self-generation. The first valve group 12 is kept open by the electrical energy provided by the thermoelectric stack 30. The thermoelectric stack 30 supplies power to the electronic controller 20, which controls the on / off state of the power supply circuit for the second valve group 13, allowing it to be opened or closed according to actual application requirements. This gas control system uses the constant-flame burner 40 to heat the thermoelectric stack 30 for power generation and the constant-flame burner 40 to ignite the main furnace burner 50. This eliminates the need for an external power source and external control modules, providing power to the system via the low-voltage electricity supplied by the thermoelectric stack 30. This design offers high safety, simple and convenient maintenance, and cost reduction.

[0102] In specific applications, the electronic controller 20 may include a boost energy storage module, which can boost the weak current provided by the thermopile 30 to a higher voltage, which can be used to open the pilot valve group 13B of the second valve group 13. Afterwards, the second valve group 13 can be maintained in an open state using a relatively low voltage. The boost energy storage module can also be used for other components that require a relatively high voltage to start.

[0103] The main burner 50 of this gas control system is used to heat the heated medium, typically water. The gas control system can be applied to scenarios such as gas water heaters or gas boilers. The following example uses water as the heated medium.

[0104] The gas control system also includes a temperature sensor 70, which detects the temperature of the water heated by the main boiler burner 50. The heated water is stored in a water tank 80. The temperature sensor 70 is communicatively connected to the electronic controller 20 to provide feedback signals. The electronic controller 20 can receive set temperature commands and control the on / off state of the power supply circuit of the second valve group 13 based on the set temperature command and the feedback signal from the temperature sensor 70.

[0105] In this embodiment, the gas control system also includes an igniter 60, which is used to ignite the constant flame burner 40. The igniter 60 can be manually operated to ignite the constant flame burner 40. Specifically, the igniter 60 can be a piezoelectric ignition device, which does not require power from the system and ensures safety.

[0106] In a specific implementation, the electronic controller 20 can be integrated into the gas valve 10 to simplify the structure. For example, the electronic controller 20 can be installed on the gas valve 10 near the first valve assembly 12.

[0107] In its implementation, the gas control system includes a control unit. This control unit is used to input a set temperature zone command to the electronic controller 20. It is also used to manually open the first valve group 12. The control unit can be the aforementioned knob 90, which can be communicatively connected to the electronic controller 20. Specifically, pressing the knob 90 applies force to the moving iron core 123 of the first valve group 12 via the connecting rod 91 to manually open the first valve group 12. Rotating the knob 90 switches the system's operating mode to set the desired water temperature. It can be understood that the system has different operating modes, each with different requirements for water temperature. Each operating mode corresponds to a set temperature. Inputting an operating mode command to the electronic controller 20 is equivalent to inputting a desired set temperature zone command to the electronic controller 20.

[0108] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A lever-type solenoid valve, characterized in that, It includes a valve port, a coil, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a sealing block, and a second valve-closing elastic element; The first magnetic conductor is inserted into the coil, with both ends of the first magnetic conductor extending out of the coil. The second magnetic conductor is fixed to the first end of the first magnetic conductor. The sealing block is disposed at the first end of the third magnetic conductor. The second end of the third magnetic conductor is connected to the second end of the first magnetic conductor. The first end of the third magnetic conductor is suspended. When the coil is energized, the first end of the third magnetic conductor is attracted to the second magnetic conductor, and the sealing block is in the open position away from the valve port; The second valve-closing elastic element can apply an elastic force to the first end of the third magnetic conductor to move the sealing block in the direction of closing the valve port.

2. The lever-type solenoid valve according to claim 1, characterized in that, The coil includes a coil body and a coil support, with the coil body wound around the outer periphery of the coil support. The first magnetic conductor includes a bent first magnetic conductor segment and a second magnetic conductor segment. The first magnetic conductor segment is inserted into the coil bracket. The end of the first magnetic conductor segment away from the second magnetic conductor segment is fixedly connected to the second magnetic conductor. The coil bracket is fixedly connected to the second magnetic conductor segment.

3. The lever-type solenoid valve according to claim 2, characterized in that, The second magnetic conductive segment has a socket, and the second end of the third magnetic conductive body passes through the socket. The third magnetic conductive body is provided with a first limiting structure, which is used to limit the position of the third magnetic conductive body relative to the second magnetic conductive segment in the direction away from the sealing block.

4. The lever-type solenoid valve according to claim 3, characterized in that, The third magnetic conductor is provided with a limiting face facing away from the direction of the sealing block, and the limiting face can abut against the second magnetic section; the first limiting structure includes the limiting face.

5. The lever-type solenoid valve according to claim 2, characterized in that, It also includes a second limiting structure, which is used to limit the position of the third magnetic conductor relative to the second magnetic section in the direction of moving closer to the sealing block.

6. The lever-type solenoid valve according to claim 5, characterized in that, The second end of the third magnetic conductor is provided with a bent section, which is located on the side of the second magnetic conductor away from the sealing block. The coil support is provided with a boss facing the third magnetic conductor, which is inclined in the direction away from the sealing element. A pre-compression elastic element is provided between the boss and the bent section, and the pre-compression elastic element is in an inclined state. The second limiting structure includes the bent section, the boss and the pre-compression elastic element.

7. The lever-type solenoid valve according to claim 2, characterized in that, The first magnetic conductor is inserted through the coil in a left-right direction. The left end of the first magnetic conductor extends out of the coil and is its first end. The second magnetic conductor is fixed to the left end of the first magnetic conductor. The right end of the first magnetic conductor extends out of the coil and is its second end.

8. The lever-type solenoid valve according to claim 7, characterized in that, The third magnetic conductor extends generally in the left-right direction. The left end of the third magnetic conductor is its first end, and the right end of the third magnetic conductor is its second end. The right end of the third magnetic conductor is connected to the right end of the first magnetic conductor, and the left end of the third magnetic conductor is connected to the sealing block.

9. The lever-type solenoid valve according to claim 8, characterized in that, The sealing block is located on the left side of the second magnetic conductor, and the coil is located on the right side of the second magnetic conductor.

10. The lever-type solenoid valve according to claim 9, characterized in that, The third magnetic conductor is located above the second magnetic conductor, and the sealing block is located below the valve port.

Images