Zero-pressure gas electromagnetic valve and gas appliance

Abstract

The utility model discloses a zero pressure type fuel gas solenoid valve and a fuel gas appliance, the fuel gas solenoid valve comprises an electromagnetic driving device, a valve bonnet, a valve core and a first elastic piece, the back surface of the valve bonnet is provided with an insertion groove, and the front surface of the valve bonnet is provided with a gas guide hole communicated with the insertion groove; one end of the valve element is inserted into the electromagnetic driving device in a sliding mode, the other end of the valve element is inserted into the inserting groove, a balance air channel exists between the valve element and the side wall of the inserting groove, a driving structure is arranged between the other end of the valve element and the side wall of the inserting groove, and a step face is arranged on the valve element. The first elastic piece is arranged between the valve element and the electromagnetic driving device; in the process that the electromagnetic driving device drives the valve element to move towards the electromagnetic driving device, the valve element opens the air guide hole and the balance air channel firstly, and then the valve element drives the valve bonnet to move through the driving structure. According to the fuel gas electromagnetic valve, the opening difficulty of the fuel gas electromagnetic valve can be effectively reduced, power consumption is reduced, and the situation that the electromagnetic valve cannot be opened by a fuel gas appliance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas solenoid valves, in particular to a zero-pressure gas solenoid valve and a gas appliance. Background Art

[0002] Gas solenoid valves are widely used in gas appliances such as gas pipelines, gas stoves and gas water heaters. Among them, the gas appliance is provided with a valve body, and a gas inlet cavity and a gas outlet cavity are arranged in the valve body. The gas inlet cavity and the gas outlet cavity are connected through a connecting hole. The solenoid valve is installed on the outer wall of the valve body, and the valve core of the solenoid valve is inserted into the gas inlet cavity. A valve cap is fixedly installed on the valve core, and the valve cap is located in the gas inlet cavity. The solenoid valve can drive the valve core to slide back and forth, so that the front of the valve cap is close to the closed connecting hole or away from the open connecting hole. In the existing gas solenoid valve, after the valve cap closes the connecting hole, the pressure of the gas entering the cavity will be greater than the pressure of the gas leaving the cavity, so that the gas pressure on the back of the valve cap is greater than the pressure on the front of the valve cap. The gas solenoid valve needs to overcome the gas pressure difference on the valve cap to drive the valve core to drive the valve cap away from the connecting hole, which makes it difficult to open. In addition, as the gas flow area of ​​the gas appliance increases (the size of the flow hole increases) and the pressure of the gas entering the cavity increases, the gas pressure difference on the valve cap is also greater. At this time, the gas solenoid valve is more difficult to open, and it is more likely that the gas appliance cannot open the solenoid valve. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a zero-pressure gas solenoid valve, which can effectively reduce the difficulty of opening the gas solenoid valve and reduce the situation where the gas appliance cannot open the solenoid valve.

[0004] The utility model also provides a gas appliance having the zero-pressure gas solenoid valve.

[0005] According to the first aspect of the present invention, a zero-pressure gas solenoid valve includes an electromagnetic drive device, a valve cap, a valve core, and a first elastic member. An insertion groove is provided on the back of the valve cap, and an air guide hole connected to the insertion groove is provided on the front of the valve cap. One end of the valve core is slidably inserted in the electromagnetic drive device, and the other end of the valve core is inserted in the insertion groove. A balanced air passage exists between the valve core and the side wall of the insertion groove, a driving structure is provided between the other end of the valve core and the side wall of the insertion groove, and a step surface is provided on the valve core. The first elastic member is provided between the valve core and the electromagnetic drive device. When the first elastic member drives the other end of the valve core to abut against the bottom wall of the insertion groove and close the air guide hole, the step surface abuts against the valve cap and closes the balanced air passage. When the electromagnetic drive device drives the valve core to move toward the electromagnetic drive device, the valve core first opens the air guide hole and the balanced air passage to connect the air guide hole and the balanced air passage, and the valve core then drives the valve cap to move through the driving structure.

[0006] The zero-pressure gas solenoid valve according to the embodiment of the utility model has at least the following beneficial effects: through the above-mentioned arrangement, during the opening process of the gas solenoid valve, the electromagnetic driving device drives the valve core to move closer to the electromagnetic driving device. During this process, the valve core first slides away from the gas guide hole to open the gas guide hole, so that the gas guide hole is connected with the balance gas channel, thereby balancing the gas pressure on the front side of the valve cap and the back side of the balance valve. Then the valve core pulls the valve cap through the driving structure. During the whole opening process, the gas pressure to which the valve core is subjected when the valve core moves toward the electromagnetic driving device is The force difference is small, and the valve core opens the valve cap only after the gas pressure on both sides of the valve cap is balanced, so that the gas pressure difference that needs to be overcome to open the valve cap is small or even zero, thereby achieving "zero pressure" opening of the solenoid valve, greatly reducing the difficulty of opening the gas solenoid valve, and reducing the situation where the gas appliance cannot open the solenoid valve. In addition, when the other end of the valve core abuts against the bottom wall of the insertion groove and closes the air guide hole, the step surface also abuts against the valve cap and closes the balanced air passage, forming a double-layer seal, which can reduce the leakage of gas from the air guide hole and avoid the setting of the air guide hole reducing the air tightness and reliability of the valve cap.

[0007] According to some embodiments of the utility model, the insertion groove includes a balancing cavity arranged in the valve bonnet and an insertion hole opened on the back side of the valve bonnet, the air guide hole and the insertion hole are connected to the balancing cavity, the valve core is inserted into the balancing cavity from the insertion hole, the balancing airway is located between the side wall of the insertion hole and the valve core, the driving structure includes a pushing part arranged on the valve core, the pushing part is located in the balancing cavity, and the pushing part can cooperate and abut with the side wall of the balancing cavity close to the electromagnetic drive device.

[0008] According to some embodiments of the present utility model, the size of the pushing portion is larger than the size of the insertion hole, and the size of the pushing portion is smaller than the size of the balancing cavity.

[0009] According to some embodiments of the utility model, the valve core includes a main shaft and an insertion column, one end of the main shaft is inserted in the electromagnetic drive device, the step surface is located on the other end of the main shaft, the insertion column extends and protrudes from the other end of the main shaft, the insertion column is inserted in the insertion hole, the pushing portion is arranged on the insertion column, and the mounting portion is arranged on the main shaft.

[0010] According to some embodiments of the utility model, a mounting portion is provided on the valve core, the first elastic member is a first spring, the first spring is sleeved on the valve core, one end of the first spring abuts against the electromagnetic drive device, and the other end abuts against the mounting portion.

[0011] According to some embodiments of the present invention, a second elastic member is provided between the valve cap and the electromagnetic drive device, and the second elastic member is used to drive the valve cap to move in a direction away from the electromagnetic drive device.

[0012] According to some embodiments of the present invention, the second elastic member is a second spring, the second spring is sleeved on the valve core, one end of the second spring abuts against the valve cap, and the other end abuts against the electromagnetic drive device.

[0013] According to some embodiments of the utility model, the electromagnetic drive device includes a bracket and an electromagnetic coil, the electromagnetic coil is installed on the bracket, and a part of the bracket is located on the front side of the electromagnetic coil, the valve cap is located on the front side of the bracket, the valve core is inserted in the bracket and the electromagnetic coil, one end of the first spring abuts against the bracket, and the other end of the second spring abuts against the bracket.

[0014] According to some embodiments of the present invention, the balancing airway is a groove arranged on the side wall of the insertion hole.

[0015] According to some embodiments of the utility model, a reinforcing plate is fitted on the back side of the valve cap, the reinforcing plate is provided with a avoidance hole, the valve core is passed through the avoidance hole, and the second spring abuts against the reinforcing plate.

[0016] According to the second aspect of the present invention, the gas appliance comprises the above-mentioned zero-pressure gas solenoid valve and valve body, the valve body is provided with a gas inlet chamber and a gas outlet chamber, the gas inlet chamber and the gas outlet chamber are connected through a connecting hole; the electromagnetic drive device is installed on the valve body, the valve core is inserted in the gas inlet chamber, the valve cap is located in the gas inlet chamber, the front side of the valve cap is opposite to the connecting hole, and the front side of the valve cap can open and close the connecting hole.

[0017] The gas appliance according to the embodiment of the utility model has at least the following beneficial effects: by adopting the above-mentioned gas solenoid valve, the difficulty of opening the gas solenoid valve of the gas appliance can be reduced, and the situation where the gas appliance cannot open the solenoid valve can be reduced. Moreover, the situation where the gas entering the gas cavity leaks from the gas guide hole of the valve cap to the gas exit cavity can be reduced, thereby reducing gas leakage.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is an internal schematic diagram of a zero-pressure gas solenoid valve according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 An enlarged view of the zero-pressure gas solenoid valve at position A is shown;

[0022] Figure 3 for Figure 1 The external structure diagram of the zero-pressure gas solenoid valve is shown;

[0023] Figure 4 for Figure 1 The schematic diagram shown is when the zero-pressure gas solenoid valve is applied to a gas appliance.

[0024] Reference numerals:

[0025] Electromagnetic drive device 100, bracket 110, electromagnetic coil 120, valve cap 200, insertion groove 210, insertion hole 210a, balance chamber 210b, air guide hole 220, balance air channel 230, reinforcement plate 240, avoidance hole 241, valve core 300, main shaft 300a, insertion column 300b, pushing part 310, step surface 320, mounting part 330, first elastic member 410, second elastic member 420, valve body 500, gas inlet chamber 510, gas outlet chamber 520, connecting hole 530. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 3According to the first embodiment of the utility model, the zero-pressure gas solenoid valve comprises an electromagnetic drive device 100, a valve cap 200, a valve core 300, and a first elastic member 410. The back of the valve cap 200 is provided with an insertion groove 210, and the front of the valve cap 200 is provided with an air guide hole 220 connected with the insertion groove 210; one end of the valve core 300 is slidably inserted in the electromagnetic drive device 100, and the other end of the valve core 300 is inserted in the insertion groove 210. There is a balancing airway 230 between the valve core 300 and the side wall of the insertion groove 210, and a driving structure is provided between the other end of the valve core 300 and the side wall of the insertion groove 210. The valve core 300 is provided with a first elastic member 410. 00 is provided with a step surface 320; the first elastic member 410 is provided between the valve core 300 and the electromagnetic driving device 100; wherein, when the first elastic member 410 drives the other end of the valve core 300 to abut against the bottom wall of the insertion groove 210 and close the air guide hole 220, the step surface 320 abuts against the valve cap 200 and closes the balance air passage 230. During the process that the electromagnetic driving device 100 drives the valve core 300 to move toward the electromagnetic driving device 100, the valve core 300 first opens the air guide hole 220 and the balance air passage 230 to connect the air guide hole 220 with the balance air passage 230, and the valve core 300 then drives the valve cap 200 to move through the driving structure.

[0031] The size of the valve core 300 is much smaller than that of the valve cap 200 . Therefore, the pressure that the electromagnetic drive device 100 needs to overcome to drive the valve core 300 to slide close to the electromagnetic drive device 100 is small, and the required power is small.

[0032] Through the above arrangement, during the opening process of the gas solenoid valve, the electromagnetic drive device 100 drives the valve core 300 to move closer to the electromagnetic drive device 100. During this process, the valve core 300 first slides away from the gas guide hole 220 to open the gas guide hole 220, so that the gas guide hole 220 is connected with the balance gas channel 230, thereby balancing the gas pressure on the front side of the valve cap 200 and the back side of the balance valve. Then, the valve core 300 pulls the valve cap 200 through the driving structure. During the entire opening process, since the valve core 300 is much smaller than the valve cap 200, the gas pressure difference to which the valve core 300 is subjected when the valve core 300 moves toward the electromagnetic drive device 100 is small, and The valve core 300 opens the valve cap 200 after the gas pressure on both sides of the valve cap 200 is balanced. The gas pressure difference that needs to be overcome to open the valve cap 200 is small or even zero, thereby achieving "zero pressure" opening of the solenoid valve, greatly reducing the difficulty of opening the gas solenoid valve, and reducing the situation where the gas appliance cannot open the solenoid valve. In addition, when the other end of the valve core 300 abuts against the bottom wall of the insertion groove 210 and closes the air guide hole 220, the step surface 320 also abuts against the valve cap 200 and closes the balanced air channel 230, forming a double-layer seal, which can reduce the leakage of gas from the air guide hole 220 and avoid the setting of the air guide hole 220 reducing the air tightness and reliability of the valve cap 200.

[0033] Reference Figure 4According to the second embodiment of the utility model, the gas appliance comprises the above-mentioned zero-pressure gas solenoid valve and valve body. The valve body 500 is provided with a gas inlet chamber 510 and a gas outlet chamber 520, and the gas inlet chamber 510 is connected with the gas outlet chamber 520 through a connecting hole 530; the electromagnetic drive device 100 is installed on the valve body 500, the valve core 300 is inserted in the gas inlet chamber 510, the valve cap 200 is located in the gas inlet chamber 510, the front of the valve cap 200 is opposite to the connecting hole 530, and the front of the valve cap 200 can open and close the connecting hole 530.

[0034] By adopting the above-mentioned gas solenoid valve, the difficulty of opening the gas solenoid valve by the gas appliance can be reduced, and the situation where the gas appliance cannot open the solenoid valve can be reduced. Moreover, the situation where the gas inlet cavity 510 leaks from the gas guide hole 220 of the valve cap 200 into the gas outlet cavity 520 can be reduced, thereby avoiding the setting of the gas guide hole 220 to reduce the air tightness and reliability of the valve cap 200 and reducing gas leakage.

[0035] Reference Figure 1 According to some embodiments of the present invention, the insertion groove 210 includes a balancing chamber 210b disposed in the valve cap 200 and an insertion hole 210a opened on the back of the valve cap 200, the air guide hole 220 and the insertion hole 210a are connected with the balancing chamber 210b, the valve core 300 is inserted into the balancing chamber 210b from the insertion hole 210a, the balancing airway 230 is located between the side wall of the insertion hole 210a and the valve core 300, and the driving structure includes a pushing part 310 disposed on the valve core 300, the pushing part 310 is located in the balancing chamber 210b, and the pushing part 310 can cooperate with and abut against the side wall of the balancing chamber 210b close to the electromagnetic driving device 100. With the above arrangement, when the electromagnetic driving device 100 drives the valve core 300 to move toward the electromagnetic driving device 100, the valve core 300 can drive the valve cap 200 to move through the pushing part 310.

[0036] It should be noted that the above-mentioned driving structure can also be arranged in other ways. For example, the above-mentioned pushing part 310 can be arranged on the inner wall of the insertion groove 210, and the driving structure includes a limiting groove arranged on the valve core 300, and the pushing part 310 is inserted into the limiting groove.

[0037] Reference Figure 1 According to some embodiments of the utility model, a mounting portion 330 is provided on the valve core 300, the first elastic member 410 is a first spring, the first spring is sleeved on the valve core 300, one end of the first spring abuts against the electromagnetic drive device 100, and the other end abuts against the mounting portion 330. With the above arrangement, the first spring is more convenient to install.

[0038] Reference Figure 1 and Figure 2According to some embodiments of the utility model, the valve core 300 includes a main shaft 300a and an insertion column 300b, one end of the main shaft 300a is inserted in the electromagnetic drive device 100, the step surface 320 is located on the other end of the main shaft 300a, the insertion column 300b extends and protrudes from the other end of the main shaft 300a, the insertion column 300b is inserted in the insertion hole 210a, the pushing part 310 is arranged on the insertion column 300b, and the mounting part 330 is arranged on the main shaft 300a. Among them, the size of the main shaft 300a is smaller than the insertion hole 210a to limit the insertion of the main shaft 300a into the insertion hole 210a. At the same time, a step surface 320 is formed on the other end of the main shaft 300a, and the step surface 320 can be used to close the balancing gas channel 230. The bottom end of the insertion column 300b can be used to close the gas guide hole 220. Therefore, when closing the connecting hole, two seals can be formed on the balancing chamber 210b, effectively avoiding the situation where the gas passes through the balancing chamber 210b and then leaks from the gas guide hole 220, thereby improving the air tightness of the gas solenoid valve when closing the connecting hole 530.

[0039] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, a second elastic member 420 is provided between the valve cap 200 and the electromagnetic drive device 100, and the second elastic member 420 is used to drive the valve cap 200 to move away from the electromagnetic drive device 100. Through the above arrangement, the valve cap 200 can be driven by the second elastic member 420 to abut against the closed communication hole 530.

[0040] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the second elastic member 420 is a second spring, which is sleeved on the valve core 300, and one end of the second spring abuts against the valve cap 200, and the other end abuts against the electromagnetic drive device 100. Therefore, when the second spring drives the valve cap 200 to abut against the closed connecting hole 530, the first spring also abuts against the closed air guide hole 220. At this time, the force of the first spring on the valve cap 200 is in the middle of the valve cap 200, and the force of the second spring on the valve cap 200 is around the first spring, thereby enabling the valve cap 200 to more tightly and reliably close the connecting hole 530.

[0041] Reference Figure 1 and Figure 2According to some embodiments of the utility model, the electromagnetic drive device 100 includes a bracket 110 and an electromagnetic coil 120, the electromagnetic coil 120 is mounted on the bracket 110, and a part of the bracket 110 is located at the front side of the electromagnetic coil 120, the valve cap 200 is located at the front side of the bracket 110, and the valve core 300 is inserted in the bracket 110 and the electromagnetic coil 120. With the above arrangement, when the gas solenoid valve is installed in the gas appliance, the front end of the bracket 110 can be installed on the valve body 500, so that the valve core 300 is inserted into the gas inlet cavity 510 of the valve body 500, so that the gas solenoid valve can be easily installed in the gas appliance.

[0042] According to some embodiments of the present invention, one end of the first spring abuts against the bracket 110, and the other end abuts against the mounting portion 330, and one end of the second spring abuts against the valve cap 200, and the other end of the second spring abuts against the bracket 110. In this way, the installation of the first spring and the second spring can be completed, and the first spring and the second spring are both located outside the electromagnetic drive device 100, so the installation of the first spring and the second spring is more convenient.

[0043] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the balancing gas passage 230 is a groove arranged on the side wall of the insertion hole 210a, so that the gas inlet chamber 510 on the valve body 500 can be connected with the balancing chamber 210b in the valve cap 200 through the groove.

[0044] It should be noted that the above-mentioned balancing air duct 230 can also be set in other ways. For example, the part of the valve core 300 in the insertion hole 210a is polygonal, and the shape of the insertion hole 210a is circular. Therefore, there is a gap between the valve core 300 and the inner wall of the insertion hole 210a, and these gaps can constitute the above-mentioned balancing air duct 230.

[0045] Reference Figure 1 According to some embodiments of the present invention, the size of the push portion 310 is larger than the size of the insertion hole 210a, and the size of the push portion 310 is smaller than the size of the balance chamber 210b. Thus, the push portion 310 can slide back and forth in the balance chamber 210b, and when the push portion 310 abuts against the rear side wall of the balance chamber 210b, the push portion 310 can drive the valve cap 200 to slide backward close to the electromagnetic drive device 100.

[0046] Reference Figure 1 and Figure 2According to some embodiments of the present invention, a reinforcing plate 240 is provided on the back of the valve cap 200, and a avoidance hole 241 is provided on the reinforcing plate 240. The valve core 300 is passed through the avoidance hole 241, and the second spring abuts against the reinforcing plate 240. Therefore, when the valve cap 200 abuts against the connecting hole 530 to close the connecting hole 530, the reinforcing plate 240 can prevent the valve cap 200 from bending backward as a whole, so that the valve cap 200 can abut against the side wall of the connecting hole 530, thereby effectively closing the connecting hole 530 and reducing gas leakage.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A zero-pressure gas solenoid valve, characterized in that: include: Electromagnetic drive device (100); A valve bonnet (200), wherein an insertion groove (210) is provided on the back of the valve bonnet (200), and an air guide hole (220) in communication with the insertion groove (210) is provided on the front of the valve bonnet (200); A valve core (300), one end of the valve core (300) being slidably inserted into the electromagnetic drive device (100), the other end of the valve core (300) being inserted into the insertion groove (210), a balancing air passage (230) being provided between the valve core (300) and the side wall of the insertion groove (210), a driving structure being provided between the other end of the valve core (300) and the side wall of the insertion groove (210), and a step surface (320) being provided on the valve core (300); A first elastic member (410) is arranged between the valve core (300) and the electromagnetic drive device (100); When the first elastic member (410) drives the other end of the valve core (300) to abut against the bottom wall of the insertion groove (210) and close the air guide hole (220), the step surface (320) abuts against the valve cap (200) and closes the balancing air channel (230). When the electromagnetic drive device (100) drives the valve core (300) to move toward the electromagnetic drive device (100), the valve core (300) first opens the air guide hole (220) and the balancing air channel (230) to connect the air guide hole (220) and the balancing air channel (230), and the valve core (300) then drives the valve cap (200) to move via the driving structure.

2. The zero-pressure gas solenoid valve according to claim 1, characterized in that: The insertion groove (210) comprises a balancing chamber (210b) arranged in the valve cap (200) and an insertion hole (210a) opened on the back side of the valve cap (200); the air guide hole (220) and the insertion hole (210a) are in communication with the balancing chamber (210b); the valve core (300) is inserted into the balancing chamber (210b) from the insertion hole (210a); the balancing air channel (230) is located between the side wall of the insertion hole (210a) and the valve core (300); the driving structure comprises a pushing portion (310) arranged on the valve core (300); the pushing portion (310) is located in the balancing chamber (210b); and the pushing portion (310) can cooperate with and abut against the side wall of the balancing chamber (210b) close to the electromagnetic drive device (100).

3. The zero-pressure gas solenoid valve according to claim 2, characterized in that: The size of the pushing portion (310) is larger than the size of the insertion hole (210a), and the size of the pushing portion (310) is smaller than the size of the balancing cavity (210b).

4. The zero-pressure gas solenoid valve according to claim 2, characterized in that: The valve core (300) is provided with a mounting portion (330), the first elastic member (410) is a first spring, the first spring is sleeved on the valve core (300), one end of the first spring abuts against the electromagnetic drive device (100), and the other end abuts against the mounting portion (330).

5. The zero-pressure gas solenoid valve according to claim 4, characterized in that: The valve core (300) comprises a main shaft (300a) and an insertion column (300b), one end of the main shaft (300a) is inserted into the electromagnetic drive device (100), the step surface (320) is located on the other end of the main shaft (300a), the insertion column (300b) extends and protrudes from the other end of the main shaft (300a), the insertion column (300b) is inserted into the insertion hole (210a), the pushing portion (310) is arranged on the insertion column (300b), and the mounting portion (330) is arranged on the main shaft (300a).

6. The zero-pressure gas solenoid valve according to claim 4, characterized in that: A second elastic member (420) is provided between the valve cap (200) and the electromagnetic drive device (100), and the second elastic member (420) is used to drive the valve cap (200) to move in a direction away from the electromagnetic drive device (100).

7. The zero-pressure gas solenoid valve according to claim 6, characterized in that: The second elastic member (420) is a second spring, the second spring is sleeved on the valve core (300), one end of the second spring abuts against the valve cap (200), and the other end abuts against the electromagnetic drive device (100).

8. The zero-pressure gas solenoid valve according to claim 7, characterized in that: The electromagnetic drive device (100) comprises a bracket (110) and an electromagnetic coil (120), wherein the electromagnetic coil (120) is mounted on the bracket (110), and a portion of the bracket (110) is located in front of the electromagnetic coil (120), the valve cap (200) is located in front of the bracket (110), the valve core (300) is inserted into the bracket (110) and the electromagnetic coil (120), one end of the first spring abuts against the bracket (110), and the other end of the second spring abuts against the bracket (110).

9. The zero-pressure gas solenoid valve according to claim 7, characterized in that: A reinforcing plate (240) is provided on the back side of the valve cap (200), the reinforcing plate (240) is provided with an escape hole (241), the valve core (300) is passed through the escape hole (241), and the second spring abuts against the reinforcing plate (240).

10. A gas appliance, characterized in that: include: The valve body (500) is provided with a gas inlet chamber (510) and a gas outlet chamber (520), wherein the gas inlet chamber (510) is connected to the gas outlet chamber (520) via a connecting hole (530); The zero-pressure gas solenoid valve according to any one of claims 1 to 8, wherein the electromagnetic drive device (100) is installed on the valve body (500), the valve core (300) is inserted into the gas inlet cavity (510), the valve cap (200) is located in the gas inlet cavity (510), the front side of the valve cap (200) is opposite to the connecting hole (530), and the front side of the valve cap (200) can open and close the connecting hole (530).

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