Combination valve and gas water heater

Abstract

The utility model discloses a combination valve and a gas water heater, the combination valve is arranged on a gas pipeline of the gas water heater, is electrically connected with a gas water heater body, and comprises a user end and a gas source end; the combination valve comprises a gas valve and an electromagnetic valve; the electromagnetic valve is arranged between the gas source end and the gas valve and used for closing a gas pipeline, leading to the user end, of the gas source end when the gas water heater body breaks down. The problem that an existing gas water heater usually controls opening and closing of an electromagnetic valve according to an electromagnetic assembly, and power consumption is large is solved, the power-on operation time of the electromagnetic assembly can be shortened, the energy consumption of the electromagnetic valve is reduced, then the operation energy consumption of a combination valve is reduced, and more electricity and more energy are saved.

Description

Technical Field

[0001] The utility model belongs to the field of gas self-closing valves, and more specifically, relates to a combined valve and a gas water heater. Background Art

[0002] As a clean and efficient energy source, gas has brought a lot of convenience to our lives. However, safety issues such as gas leakage and explosion are also common. According to statistics, the property losses and casualties caused by gas leakage, explosion and other accidents are very serious every year in the country. Therefore, it has become a top priority to strengthen gas safety management and protect the lives and property of citizens.

[0003] When the pressure in the gas pipeline becomes abnormal, the pressure self-closing valve and solenoid valve of the gas water heater will automatically close to prevent the gas from continuing to leak out, thereby protecting the lives and property of citizens.

[0004] However, existing gas water heaters usually require electromagnetic components that are powered on all the time to control the electromagnetic valve to remain open or closed, which consumes a lot of electricity. Utility Model Content

[0005] In view of the problem that existing gas water heaters usually consume a lot of power by controlling the opening and closing of the solenoid valve based on the electromagnetic component, the purpose of the utility model is to provide a combination valve, which is arranged on the gas pipeline of the gas water heater, including a user end and a gas source end; the combination valve comprises a gas valve and a solenoid valve; the solenoid valve is arranged between the gas source end and the gas valve, and the solenoid valve is provided with a controller, and the controller signal is connected to the gas water heater body; wherein the solenoid valve is a pulse valve.

[0006] Furthermore, the solenoid valve includes: a valve body, which is provided with a first valve port; an electromagnetic assembly, which is located in the valve body and electrically connected to a controller; a valve cover, which is movably arranged above the first valve port and is used to open or close the first valve port, and a spring is provided between the valve cover and the valve body, and the spring is used to keep the valve cover in a state of closing the first valve port when the solenoid valve is closed; a valve core, one end of the valve core is connected to the valve cover, and the other end of the valve core is connected to the electromagnetic assembly, and the valve core can drive the valve cover to move up and down; a magnetic part, which is located at one end of the valve body away from the valve cover, and is used to keep the valve cover in a state of opening the first valve port when the solenoid valve is opened.

[0007] Furthermore, the sealing surface of the first valve port includes: a sealing plane; a first sealing inclined surface, arranged on the outer side of the sealing plane and obliquely connected to the sealing plane; and a second sealing arc surface, arranged on the inner side of the sealing plane and obliquely connected to the sealing plane.

[0008] Furthermore, the first sealing inclined surface and the second sealing arc surface are arranged to be inclined downward.

[0009] Furthermore, an annular sealing surface is provided on one side of the valve cover close to the first valve port, the inner diameter of the annular sealing surface is smaller than the inner diameter of the first valve port, and the outer diameter of the annular sealing surface is larger than the outer diameter of the first valve port, so that the annular sealing surface can cover the sealing surface of the first valve port.

[0010] Furthermore, the valve cover includes: a sealing body, used to seal the first valve port; and a pressure cover, pressed on top of the sealing body; wherein, when the valve cover closes the first valve port, the sealing body is pressed between the pressure cover and the first valve port, and fits with the sealing surface of the first valve port.

[0011] Furthermore, the combination valve also includes: a user connector, which is sleeved on the user end of the solenoid valve; wherein the user connector is provided with an internal thread matching the user pipeline, and the solenoid valve is connected to the user pipeline via the user connector.

[0012] Furthermore, the user connector is connected to the solenoid valve via a retaining spring.

[0013] Furthermore, the combination valve also includes: at least one sealing ring, which is arranged at the connection between the user connector and the user end.

[0014] Furthermore, the utility model provides a gas water heater using a combination valve, the gas water heater comprising: a gas water heater body, provided with a fault detection module; any one of the combination valves described above, connected to the gas input pipeline of the gas water heater body through the user end; wherein the combination valve is electrically connected to the gas water heater body, and when the fault detection module detects that the gas water heater body has a fault, the gas water heater body can control the combination valve to close.

[0015] Technical effects and advantages of the utility model:

[0016] 1. Compared with the opening and closing controlled by ordinary solenoid valves, the pulse valve can use the magnetic attraction of the magnetic parts to keep the solenoid valve in the open state, and the solenoid component does not need to be powered on to operate; when a fault occurs at the water heater end, the controller outputs a pulse power supply, and the solenoid component is powered on to push the valve cover to the closed state, and the spring will keep the valve cover in the closed state, thereby reducing the power-on operation time of the solenoid component, reducing the energy consumption of the solenoid valve, and then reducing the operating energy consumption of the combination valve, saving more electricity and energy.

[0017] 2. The sealing surface at the valve port of a conventional solenoid valve is a plane, and its sealing contact surface is relatively small. By providing an arc-shaped sealing surface at the first valve port, the contact area between the first valve port and the valve cover can be increased, and the sealing performance is better.

[0018] 3. Traditional gas self-closing valves are usually of one-piece design, and the gas self-closing valve is directly connected to the user end of the self-closing valve. Different user pipe diameters require matching gas self-closing valves of different specifications. By setting a split user connector at the user end of the solenoid valve, user connectors with different specifications of internal threads can be replaced according to different user pipe diameters, thereby improving the applicability of the combination valve. During factory production, it is only necessary to produce user connectors of different specifications, and then install user connectors of different specifications on the same specification of gas self-closing valves. Compared with producing gas self-closing valves of different specifications, the cost of producing user connectors of different specifications is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a combination valve provided by the present application;

[0020] Figure 2 yes Figure 1 Cross-sectional view of the middle combination valve;

[0021] Figure 3 yes Figure 1 A cross-sectional view of the connection between the user connector and the solenoid valve;

[0022] Figure 4 yes Figure 1 Exploded view of the connection between the user connector and the solenoid valve;

[0023] Figure 5 yes Figure 2 A partial enlarged view of the middle valve cover and the first valve port;

[0024] Figure 6 is a partial enlarged view of the first valve port;

[0025] Figure 7 It is an exploded diagram of the solenoid valve;

[0026] Figure 8 It is a cross-sectional view of the connection between the cover plate and the magnetic body.

[0027] In the figure:

[0028] 100, combination valve; 101, gas source end; 102, user end; 10, solenoid valve; 11, power cord; 12, coil; 13, iron core; 14, valve core; 141, baffle; 15, valve cover; 151, pressure cover; 152, sealing body; 16, spring; 17, end cover; 20, gas valve; 30, first valve port; 31, sealing plane; 32, first sealing inclined surface; 33, second sealing arc surface; 40, user connector; 51, retaining ring; 52, sealing ring; 200, controller; 210, magnetic part; 211, cover plate; 212, magnetic body. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0030] See also Figure 1 and Figure 2 , which is a schematic diagram of the structure of a combination valve provided by the present application. Figures 1 to 8 The combination valve 100 is arranged on the gas pipeline of the gas water heater, electrically connected to the gas water heater body, including a user end 101 and a gas source end 102; the combination valve includes a gas valve 20 and a solenoid valve 10; the solenoid valve 10 is arranged between the gas source end 102 and the gas valve 20, and is used to close the gas pipeline from the gas source end 102 to the user end 101 when the gas water heater body fails. Among them, the solenoid valve 10 is a pulse valve.

[0031] It is understandable that by setting the electromagnetic valve 10 of the combination valve 100 to be electrically connected to the gas appliance body, the gas appliance end and the combination valve 100 can be linked. When a fault occurs at the gas appliance end, the electromagnetic valve 10 can receive a fault signal from the gas appliance end, and close the electromagnetic valve according to the fault signal from the gas appliance end, cutting off the gas pipeline of the gas appliance, effectively protecting the lives and property of citizens. When the fault at the gas appliance end is resolved, the electromagnetic valve can be opened by manually pulling the rod to achieve conduction of the gas pipeline.

[0032] In a specific embodiment, when the water heater has a fault such as excessive carbon monoxide concentration, lack of oxygen, or flameout, the water heater body sends out an alarm signal, and the solenoid valve 10 can receive the alarm signal and close the solenoid valve 10 in time according to the alarm signal, thereby cutting off the gas pipeline of the gas appliance in time.

[0033] Furthermore, the solenoid valve 10 is provided with a controller 200, and the solenoid valve includes a magnetic part 210 and an electromagnetic assembly; wherein the solenoid valve 10 is a pulse valve; the magnetic part 210 is used to open the gas pipeline from the gas source end 102 to the user end 101; the electromagnetic assembly is used to close the gas pipeline from the gas source end 102 to the user end 101 when a failure occurs in the gas water heater.

[0034] Combination Figures 1 to 8, the controller 200 is electrically connected to the electromagnetic assembly of the electromagnetic valve 10. The electromagnetic valve 10, for example, includes a power cord 11, a valve body, an electromagnetic assembly, a magnetic member 210, a valve core 14, a valve cover 15 and a spring 16. The valve body is provided with a first valve port 30; the valve cover 15 is movably arranged above the first valve port 30 to open or close the first valve port 30; the valve core 14 passes through the valve cover 15 from the middle of the valve cover 15 to drive the valve cover 15 to move up and down.

[0035] Specifically, the electromagnetic assembly is located in the valve body and is electrically connected to the controller 200, and is used to drive the valve core 14 and the valve cover 15 to move downward when a fault occurs at the water heater end, so that the valve cover 15 closes the first valve port 30. For example, the electromagnetic assembly includes a coil 12 and an iron core 13. The spring 16 is arranged between the valve cover 15 and the valve body, and is used to keep the valve cover 15 in a state of closing the first valve port 30 when the electromagnetic valve 10 is closed. The magnetic member 210 is located at one end of the valve body away from the valve cover 15, and is used to keep the valve cover 15 in a state of opening the first valve port 30 when the electromagnetic valve 10 is opened.

[0036] For example, the magnetic part 210 is a permanent magnet arranged at the top of the valve body. The magnetic attraction of the magnetic part 210 can keep the iron core 13 at the upper limit position. At this time, the valve cover 15 opens the first valve port 30 and keeps it open, the solenoid valve 10 opens, and the gas pipeline from the gas source end 102 to the user end 101 is opened.

[0037] When a fault occurs at the water heater end and the ignition coil of the water heater body senses that the flame is extinguished, the controller 200 can receive the signal and send out a pulse power supply according to the signal to control the electromagnetic component to be energized and operate. The electromagnetic component generates a downward magnetic attraction, and the magnetic attraction generated by the electromagnetic component is greater than the magnetic attraction of the magnetic part 210, thereby causing the valve core 14 and the valve cover 15 to move downward, and the valve cover 15 closes the first valve port 30, and the spring 16 can keep the valve cover 15 in a closed state, thereby cutting off the gas pipeline from the gas source end 102 to the user end 101.

[0038] It can be understood that, compared with controlling the opening and closing of the solenoid valve 10 through the electromagnetic component, by adding a magnetic part 210 and a spring 16 to the solenoid valve 10, the magnetic attraction of the magnetic part 210 can be used to keep the solenoid valve 10 in an open state, and the elastic force of the spring 16 can keep the solenoid valve 10 in a closed state. Therefore, the electromagnetic component does not need to be powered on all the time in the open and closed states; only when a fault occurs at the water heater end, the electromagnetic component will be powered on to close the solenoid valve 10. Therefore, the power-on time of the electromagnetic component can be reduced, the energy consumption of the solenoid valve 10 can be reduced, and then the operating energy consumption of the combination valve can be reduced, which is more power-saving and energy-saving.

[0039] Further, combined with Figure 8The magnetic member 210 includes: a cover plate 211 and a magnetic body 212. A groove 221 is provided at the bottom of the magnetic body 212, and a protrusion 222 is provided at the top of the iron core 13. When the valve cover 15 opens the first valve port 30 and keeps it open, the protrusion 222 is located in the groove 221. By providing a groove 221 at the bottom of the magnetic body 212 and a protrusion 222 at the top of the iron core 13, the contact area between the magnetic body 212 and the iron core 13 can be increased, thereby increasing the magnetic attraction between the magnetic body 212 and the iron core 13. For example, the protrusion 222 and the groove 221 are truncated cone-shaped.

[0040] Furthermore, the upper part of the solenoid valve 10 is connected to the valve body of the lower part by a snap-fit ​​method. It is understandable that the snap-fit ​​method is easy to disassemble and operate, and the upper part of the solenoid valve 10 can be disassembled during transportation, which reduces the space occupied by the combination valve 100 and reduces transportation costs. On the other hand, because the upper part of the solenoid valve 10 is provided with an electromagnetic component, it is necessary to connect the circuit for power supply, and the valve body of the lower part is all sealing-related parts, and there is no need to connect the circuit for power supply. When there is a circuit fault in the solenoid valve 10, the snap-fit ​​method facilitates the disassembly of the upper part of the solenoid valve 10 for maintenance, which is more convenient for later maintenance and troubleshooting.

[0041] Furthermore, a side of the first valve port 30 close to the valve cover 15 is provided with an arc-shaped sealing surface.

[0042] It should be noted that the sealing surface at the valve port of the conventional solenoid valve 10 is a plane, and its sealing contact surface is relatively small. By providing an arc-shaped sealing surface at the first valve port 30, the contact area between the first valve port 30 and the valve cover 15 can be increased, and the sealing performance is better.

[0043] Further, combined with Figure 6 The sealing surface of the first valve port 30 includes: a sealing plane 31; a first sealing inclined surface 32, which is arranged on the outer side of the sealing plane 31 and connected to the sealing plane 31 in an arc; and a second sealing arc surface 33, which is arranged on the inner side of the sealing plane 31 and connected to the sealing plane 31 in an oblique manner. For example, the first sealing inclined surface 32 can be an inclined surface or an arc surface, which is not limited here.

[0044] It should be noted that the full arc surface sealing surface is difficult to process and has a relatively high processing cost. By combining the sealing plane 31 with the sealing arc surface, it is possible to improve the sealing performance of the solenoid valve 10 while avoiding a significant increase in processing difficulty and processing cost.

[0045] Further, combined with Figure 6 The first sealing inclined surface 32 and the second sealing arc surface 33 are arranged to be inclined downward.

[0046] It should be noted that when the gas is impure, there may be foreign matter in the gas pipeline. When the foreign matter is located at the sealing surface of the valve port, the foreign matter will stay on the plane because the sealing surface is a plane. When the solenoid valve 10 is closed, the foreign matter is located between the sealing surface of the valve port and the valve cover 15, so the sealing surface of the valve port and the valve cover 15 cannot be completely fitted, which will affect the sealing performance of the solenoid valve 10 at the valve port.

[0047] By setting the first sealing bevel 32 and the second sealing arc surface 33 to be inclined downward, the impurities and foreign objects in the gas pipeline cannot stay on the sealing surface of the first valve port 30. When the impurities and foreign objects are located at the sealing surface of the first valve port 30, since the outer side of the sealing plane 31 is provided with the first sealing bevel 32 inclined downward, and the inner side of the sealing plane 31 is provided with the second sealing arc surface 33 inclined downward, the impurities and foreign objects can slide along the first sealing bevel 32 or the second sealing arc surface 33 and will not stay on the sealing surface of the first valve port 30. When the solenoid valve 10 is closed, the valve cover 15 can be completely fitted with the sealing surface of the first valve port 30, thereby ensuring the sealing performance at the first valve port 30.

[0048] In a specific embodiment, the valve cover 15 is provided with an annular sealing surface on one side close to the first valve port 30, the inner diameter of the annular sealing surface is smaller than the inner diameter of the first valve port 30, and the outer diameter of the annular sealing surface is larger than the outer diameter of the first valve port 30, so that the annular sealing surface can cover the sealing surface of the first valve port 30. For example, a baffle 141 is further provided at the bottom of the valve core 14, and the baffle 141 can prevent the valve cover from falling off the valve core 14. Among them, the diameter of the baffle 141 is larger than the inner diameter of the annular sealing surface, and the diameter of the baffle 141 is smaller than the inner diameter of the first valve port 30.

[0049] Furthermore, the valve cover 15 includes: a sealing body 152, which is used to seal the first valve port 30; and a pressure cover 151, which is pressed on the top of the sealing body 152; wherein, when the valve cover 15 closes the first valve port 30, the sealing body 152 is pressed between the pressure cover 151 and the first valve port 30, and fits with the sealing surface of the first valve port 30. The bottom of the sealing body 152 may be provided with a sealing groove corresponding to the shape of the first valve port 30, or may be an elastic sealing member that can be deformed according to the shape of the first valve port 30. For example, a sealing groove is provided at the bottom of the pressure cover 151, and the sealing body 152 is embedded in the sealing groove. The sealing body 152 and the pressure cover 151 may be bonded or directly clamped.

[0050] In a specific embodiment, the sealing body 152 is a rubber part. When squeezed by the pressure cover 151, the sealing surface of the sealing body 152 can be deformed so that the sealing surface of the sealing body 152 adapts to the shape of the first valve port 30 and fits tightly against the sealing surface of the first valve port 30.

[0051] By configuring the valve cover 15 to include a sealing body 152 and a pressure cover 151 , when the valve cover 15 closes the first valve port 30 , the pressure cover 151 can squeeze the sealing body 152 , so that the sealing body 152 and the first valve port 30 fit more closely and have better sealing performance.

[0052] Furthermore, the combination valve 100 also includes: a user connector 40, which is sleeved on a side of the solenoid valve 10 close to the user end 101; wherein the user connector 40 is provided with an internal thread matching the user pipeline, and the solenoid valve 10 is connected to the user pipeline through the user connector 40.

[0053] It should be noted that the traditional gas self-closing valve is usually an integrated design, and the gas self-closing valve is directly connected to the user end 101 of the self-closing valve. Different user pipe diameters require matching gas self-closing valves of different specifications. By providing a split user connector 40 at the user end 101 of the solenoid valve 10, user connectors 40 with internal threads of different specifications can be replaced according to different user pipe diameters, thereby improving the applicability of the combination valve 100. During factory production, it is only necessary to produce user connectors 40 of different specifications, and then install user connectors 40 of different specifications on the same specification of gas self-closing valves. Compared with producing gas self-closing valves of different specifications, the cost of producing user connectors 40 of different specifications is lower.

[0054] Further, combined with Figure 3 and Figure 4 , the user connector 40 is connected to the solenoid valve 10 via a retaining spring 51. For example, the retaining spring 51 is hexagonal in shape.

[0055] Furthermore, the combination valve 100 further includes: at least one sealing ring 52, which is arranged at the connection between the user connector 40 and the solenoid valve 10. Since the user connector 40 and the solenoid valve 10 are of split design, it is necessary to consider the sealing performance of the connection between the user connector 40 and the solenoid valve 10. By providing at least one sealing ring 52 at the connection between the user connector 40 and the solenoid valve 10, the sealing performance of the connection between the user connector 40 and the solenoid valve 10 can be guaranteed, and gas leakage from the connection between the user connector 40 and the solenoid valve 10 can be avoided.

[0056] In a specific embodiment, two sealing rings 52 are provided at the connection between the user connector 40 and the solenoid valve 10 .

[0057] Furthermore, the utility model provides a gas water heater, which comprises: a gas water heater body, which is provided with a fault detection module; any one of the combination valves described above, which is connected to the gas input pipeline of the gas water heater body through the user end 101; wherein the combination valve 100 is electrically connected to the gas water heater body, and when the fault detection module detects that the gas water heater body has a fault, the gas water heater body can control the combination valve 100 to close.

[0058] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0059] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A combination valve, characterized in that: The combination valve (100) is arranged on a gas pipeline of a gas water heater, and comprises a user end (101) and a gas source end (102); the combination valve (100) comprises a gas valve (20) and a solenoid valve (10); the solenoid valve (10) is arranged between the gas source end (102) and the gas valve (20); the solenoid valve (10) is provided with a controller (200), and the controller (200) is connected to the gas water heater body through a signal; wherein the solenoid valve (10) is a pulse valve, and the solenoid valve (10) can remain in an open state without being powered on.

2. The combination valve according to claim 1, characterized in that: The solenoid valve (10) comprises: The valve body is provided with a first valve port (30); An electromagnetic component, the electromagnetic component is located in the valve body and is electrically connected to the controller (200); a valve cover (15) movably disposed above the first valve port (30) and used for opening or closing the first valve port (30), and a spring (16) is disposed between the valve cover (15) and the valve body; wherein the spring (16) is used to keep the valve cover (15) in a state of closing the first valve port (30) when the solenoid valve (10) is closed; A valve core (14), one end of the valve core (14) is connected to the valve cover (15), and the other end of the valve core (14) is connected to the electromagnetic component, and the valve core (14) can drive the valve cover (15) to move up and down; The magnetic member (210) is located at one end of the valve body away from the valve cover (15), and is used to keep the valve cover (15) in the open state of the first valve port (30) when the valve cover (15) is opened.

3. The combination valve according to claim 2, characterized in that: The magnetic component (210) comprises a cover plate (211) and a magnetic body (212); a groove (221) is provided at the bottom of the magnetic body (212); and a protrusion (222) matching the groove (221) is provided at the top of the electromagnetic component.

4. The combination valve according to claim 1, characterized in that: The combination valve (100) further comprises: A user connector (40) is sleeved on the user end (101) of the solenoid valve (10); The user connector (40) is provided with an internal thread matching the user pipeline, and the solenoid valve (10) is connected to the user pipeline via the user connector (40).

5. The combination valve according to claim 4, characterized in that: The user connector (40) is connected to the solenoid valve (10) via a clamping spring (51).

6. The combination valve according to claim 5, characterized in that: The combination valve (100) further comprises: At least one sealing ring (52) is arranged at the connection between the user connector (40) and the user end (101).

7. The combination valve according to claim 2, characterized in that: The sealing surface between the first valve port (30) and the valve cover (15) is an arc-shaped sealing surface, and the arc-shaped sealing surface comprises: Sealing plane (31); A first sealing inclined surface (32) is arranged outside the sealing plane (31) and is connected to the sealing plane (31) in an arc; The second sealing arc surface (33) is arranged on the inner side of the sealing plane (31) and is obliquely connected to the sealing plane (31).

8. The combination valve according to claim 7, characterized in that: An annular sealing surface is provided on one side of the valve cover (15) close to the first valve port (30); the inner diameter of the annular sealing surface is smaller than the inner diameter of the first valve port (30), and the outer diameter of the annular sealing surface is larger than the outer diameter of the first valve port (30), so that the annular sealing surface can cover the sealing surface of the first valve port (30).

9. The combination valve according to claim 7, characterized in that: The valve cover (15) comprises: A sealing body (152) for sealing the first valve port (30); A pressure cover (151) is pressed on the top of the sealing body (152); When the valve cover (15) closes the first valve port (30), the sealing body (152) is pressed between the pressure cover (151) and the first valve port (30) and fits against the sealing surface of the first valve port (30).

10. A gas water heater, characterized in that: The gas water heater comprises: The gas water heater body is provided with a fault detection module; The combination valve (100) according to any one of claims 1 to 9, connected to the gas input pipeline of the gas water heater body through the user end (101); in, The signal input end of the controller (200) is signal-connected to the signal output end of the ignition coil of the gas water heater.

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