Gas stove ignition device and gas stove

Abstract

The application discloses a gas stove ignition device, which comprises an ignition switch, which is configured to be pressed; an ignition control circuit comprising an ignition system and a first control circuit; a thermocouple control circuit comprising at least one thermocouple and a second control circuit, a solenoid valve for controlling the on-off of a gas passage, and connected with the first control circuit and the second control circuit; the first control circuit and the second control circuit are also connected with the ignition switch, and by pressing the ignition switch, the first control circuit and the second control circuit can be switched to a first control state; the thermocouple is configured to sense the temperature of the gas stove, and when the preset temperature is reached, the first control circuit and the second control circuit are switched to a second control state; in the first control state, the solenoid valve is opened, and the ignition system is powered on; in the second control state, the solenoid valve is closed, and the ignition system is powered off. The above-mentioned ignition device can automatically stop ignition after detecting successful ignition, thereby avoiding battery waste.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a gas stove ignition device and a gas stove. Background Technology

[0002] With social development and the continuous improvement of people's environmental awareness, natural gas energy is becoming more and more widespread, and gas stoves are now found in thousands of households. However, the safety hazards brought about by gas use have been exposed through a series of tragedies.

[0003] The instant ignition function, delayed ignition function, and flameout protection function of existing gas stoves are a kind of protection for gas safety.

[0004] The instant ignition function involves the gas stove igniting and simultaneously energizing the solenoid valve with a pulse generator, keeping the solenoid valve energized for at least 5 seconds. This ensures sufficient time for the gas stove to heat the thermocouple, generating enough electrical energy to keep the solenoid valve open. However, the energizing time of the pulse generator to the solenoid valve in this ignition process is often fixed and cannot detect whether the gas stove's thermocouple has been fully heated to the required temperature. If the thermocouple is dirty, the time required to heat it to a certain temperature often exceeds the energizing time of the pulse generator to the solenoid valve, easily causing the flame to extinguish after the ignition is released and the flame resumes burning once the energizing time of the pulse generator to the solenoid valve is reached. Extending the energizing time of the pulse generator to the solenoid valve would waste battery power, leading to frequent gas stove battery replacements, environmental pollution, and a negative impact on user experience.

[0005] The delayed ignition function allows the igniter to continue igniting for more than 5 seconds after the ignition button is pressed, preventing gas leaks caused by the ignition stopping before the gas is burned and improving the ignition success rate. However, the delayed ignition function means that the igniter will continue to discharge for a set time regardless of whether ignition is successful or not. It cannot stop discharging after successful ignition, resulting in wasted power. The continuous discharge after successful ignition gives users the feeling of an ignition failure, affecting the user experience.

[0006] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0007] To address the technical problem that if the thermocouple for flameout protection is dirty, the time required to heat up to the power needed to maintain the solenoid valve often exceeds the energizing time of the pulse generator to the solenoid valve, this invention provides a gas stove ignition device and gas stove. After successful ignition is detected, it continuously supplies power to the solenoid valve for a period of time, avoiding the inability to maintain the solenoid valve opening due to insufficient heating temperature of the thermocouple. This improves the ignition success rate of the gas stove, makes gas use safer, and saves battery power.

[0008] To achieve the above-mentioned objectives, the present invention employs the following technical solution: A gas stove ignition device, comprising: The ignition switch is configured to be pressable. Ignition control circuit, including ignition system and first control circuit; A thermocouple control circuit includes at least one thermocouple and a second control circuit. The solenoid valve is used to control the opening and closing of the gas passage and is connected to the first control circuit and the second control circuit. The first control circuit and the second control circuit are also connected to the ignition switch. By pressing the ignition switch, the first control circuit and the second control circuit can be switched to the first control state. The thermocouple is configured to sense the temperature of the gas stove, and when the preset temperature is reached, it controls the first control circuit and the second control circuit to switch to the second control state. In the first control state, the solenoid valve opens, and the ignition system is powered on and running. In the second control state, the solenoid valve is closed, and the ignition system is powered off and shut down.

[0009] Furthermore, the ignition switch includes a moving iron core and a stationary iron core arranged at relative intervals, and a first coil and a second coil respectively sleeved on the moving iron core and the stationary iron core; The first coil is connected to the second control circuit, and the second coil is connected to the first control circuit.

[0010] Furthermore, the solenoid valve includes a valve body, a main solenoid coil, and a secondary solenoid coil. The main solenoid coil and the secondary solenoid coil are used to control the movement of the valve body. The main solenoid coil is connected to a second control circuit, and the secondary solenoid coil is connected to a first control circuit.

[0011] Furthermore, the first control circuit includes a power supply, a time-limited switch A connected to the power supply, the other end of the time-limited switch A being connected to a delay switch B and a second coil, the other end of the delay switch B being connected to a solenoid valve sub-coil and a first switch C, the other end of the first switch C being connected to an ignition system, and the other ends of the ignition system, the solenoid valve sub-coil, and the second coil being connected to the power supply, forming a circuit.

[0012] Furthermore, the second control circuit includes a second switch D and a third switch E. One end of the second switch D is connected to a thermocouple, and the other end of the second switch D is connected to a first coil. One end of the third switch E is connected to a thermocouple, and the other end of the third switch E is connected to the main coil of the solenoid valve. The other ends of the first coil and the main coil of the solenoid valve are connected to the thermocouple, forming a circuit.

[0013] Furthermore, the first control circuit includes a power supply, a time-limited switch A connected to the power supply, the other end of the time-limited switch A being connected to a solenoid valve sub-coil, a second coil, and a first switch C, the other end of the solenoid valve sub-coil being connected to a delay switch B, and the other end of the first switch C being connected to an ignition system. The ignition system, the delay switch B, and the other end of the second coil are respectively connected to the power supply and form a circuit.

[0014] Furthermore, the first control circuit includes a power supply, a fourth switch F, a first switch C, and a solenoid valve sub-coil, all connected to the power supply. The other end of the fourth switch F is connected to the second coil, the other end of the solenoid valve sub-coil is connected to the time delay switch B, and the other end of the first switch C is connected to the ignition system. The other ends of the ignition system, the time delay switch B, and the second coil are all connected to the power supply and form a circuit.

[0015] Furthermore, the ignition switch also includes a spring element connected to the moving iron core, which is used to separate the moving iron core from the stationary iron core.

[0016] Furthermore, the delay time of the delay switch B is 3~5s; the setting time of the time limit switch A is 10s.

[0017] The present invention also includes a gas stove, which includes the gas stove ignition device described above.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are: The gas stove ignition device described above, by setting a first control circuit and a second control circuit, can automatically stop ignition when the thermocouple reaches a preset temperature after successful ignition is detected, thus avoiding waste of battery power.

[0019] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an ignition control circuit diagram of the gas stove ignition device according to Embodiment 1 of the present invention; Figure 2 This is a circuit diagram of the thermocouple portion of the gas stove ignition device according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the ignition switch of the gas stove ignition device according to Embodiment 1 of the present invention; Figure 4 This is an ignition control circuit diagram of the gas stove ignition device according to Embodiment 2 of the present invention; Figure 5 This is a circuit diagram of the thermocouple portion of the gas stove ignition device according to Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the ignition switch of the gas stove ignition device according to Embodiment 2 of the present invention; Figure 7 This is an ignition control circuit diagram of the gas stove ignition device according to Embodiment 3 of the present invention; Figure 8 This is a circuit diagram of the thermocouple portion of the gas stove ignition device according to Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the ignition switch of the gas stove ignition device according to Embodiment 3 of the present invention; Explanation of reference numerals in the attached figures: Ignition switch 100; Moving iron core 110; Stationary iron core 120; First coil 130; Second coil 140; Spring 150; Solenoid valve main coil 210; Solenoid valve auxiliary coil 220; Thermocouple 300; Ignition system 400; Time-limited switch A; Delay switch B; First switch C; Second switch D; Third switch E; Fourth switch F. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] The gas stove ignition device of the present invention includes an ignition switch 100, an ignition control circuit, a thermocouple control circuit, and a solenoid valve.

[0027] The ignition switch 100 is configured to be pressable.

[0028] The ignition control circuit includes an ignition system 400 and a first control circuit.

[0029] The thermocouple control circuit includes at least one thermocouple 300 and a second control circuit.

[0030] The solenoid valve is used to control the opening and closing of the gas passage and is connected to the first control circuit and the second control circuit.

[0031] The first control circuit and the second control circuit are also connected to the ignition switch 100. By pressing the ignition switch 100, the first control circuit and the second control circuit can be switched to the first control state.

[0032] Thermocouple 300 is configured to sense the temperature of the gas stove and, when the preset temperature is reached, control the first control circuit and the second control circuit to switch to the second control state.

[0033] In the first control state, the solenoid valve opens, and the ignition system 400 is powered on and running. In the second control state, the solenoid valve is closed, and the ignition system 400 is de-energized and shut down.

[0034] The gas stove ignition device described above, by setting a first control circuit and a second control circuit, can automatically stop ignition when the thermocouple reaches a preset temperature after successful ignition is detected, thus avoiding waste of battery power.

[0035] The structure of the gas stove ignition device will be explained in detail below. Example 1

[0036] Reference Figures 1-3 This is an embodiment of the gas stove ignition device of the present invention.

[0037] The gas stove ignition device includes an ignition switch 100, a solenoid valve, a thermocouple 300, an ignition control circuit, and a thermocouple control circuit.

[0038] See Figure 3 The ignition switch 100 includes a moving iron core 110 and a stationary iron core 120 spaced apart from each other, and a first coil 130 and a second coil 140 respectively sleeved on the moving iron core 110 and the stationary iron core 120. The moving iron core 110 can move up and down. The moving iron core 110 is connected to an elastic element, such as a spring 150, which can keep the moving iron core 110 and the stationary iron core 120 in a separated state.

[0039] The solenoid valve includes a valve body, a main solenoid coil 210, and a secondary solenoid coil 220. The solenoid valve is connected to the gas passage. The main solenoid coil 210 and the secondary solenoid coil 220 are used to control the valve body's movement.

[0040] See Figure 1 The ignition control circuit includes a first control circuit and an ignition system 400. The first control circuit includes a power supply, a time-limited switch A connected to the power supply, and the other end of the time-limited switch A is connected to a delay switch B and a second coil 140. The other end of the delay switch B is connected to a solenoid valve secondary coil 220 and a first switch C. The other end of the first switch C is connected to the ignition system 400. The other ends of the ignition system 400, the solenoid valve secondary coil 220, and the second coil 140 are respectively connected to the power supply, forming a circuit.

[0041] See Figure 2 The thermocouple control circuit includes a second control circuit and thermocouple 300.

[0042] The second control circuit includes a second switch D and a third switch E. One end of the second switch D is connected to the thermocouple 300, and the other end of the second switch is connected to the first coil 130. One end of the third switch E is connected to the thermocouple 300, and the other end of the third switch E is connected to the solenoid valve main coil 210. The other ends of the first coil 130 and the solenoid valve main coil 210 are connected to the thermocouple 300, forming a circuit.

[0043] See Figure 3When the moving iron core 110 separates from the stationary iron core 120, the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D are open, and the third switch E is closed. Pressing the moving iron core 110 closes the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D, and opens the third switch E. When the second coil 140 is energized, the stationary iron core 120 becomes magnetic, allowing it to attract the moving iron core 110. The potential generated by the thermocouple, passing through the first coil 130, causes the moving iron core 110 to generate an electromagnetic field in the opposite direction to that of the stationary iron core. This creates a repulsive force between the moving iron core 110 and the stationary iron core 120, causing them to separate. This, in turn, opens the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D, and closes the third switch E. The generation of electromagnetic fields in opposite directions between the stationary iron core 120 and the moving iron core 110 can be achieved by reversing the direction of the current flowing into the first coil 130 and the second coil 140. Alternatively, the first coil 130 and the second coil 140 can be wound in opposite directions while current is passed through them in the same direction.

[0044] The working principle of the gas stove ignition device in this embodiment is as follows.

[0045] Pressing the moving iron core 110 causes the contacts of the four switches ABCDE to move downward a certain distance, closing the time-limited switch A, the delay switch B, the first switch C, and the second switch D, while opening the third switch E.

[0046] When delay switch B opens, time limit switch A opens simultaneously, power is supplied to the secondary coil 220 of solenoid valve, solenoid valve opens, thus opening the gas passage.

[0047] When delay switch B opens, first switch C opens simultaneously, and ignition system 400 begins discharge ignition.

[0048] Timer switch A is turned on, the second coil 140 is energized, so that the stationary iron core 120 has a magnetic field, so that the stationary iron core 120 and the moving iron core 110 are attracted together, keeping the ABCDE switch in the open and closed state. At the same time, timer switch A is set to a certain opening time. If the set time is exceeded, timer switch A (the main circuit switch) will automatically turn off to avoid gas leakage due to prolonged failure to ignite.

[0049] When the second switch D is opened, the potential generated by the thermocouple 300 passes through the first coil 130, causing the moving iron core 110 to generate an electromagnetic field in the opposite direction to the stationary iron core. A repulsive force is generated between the moving iron core 110 and the stationary iron core 120. When the gas is ignited, the flame heats the thermocouple 300 to a certain temperature. The generated thermoelectric potential makes the attraction force between the moving iron core 110 and the stationary iron core 120 less than the repulsive force (the sum of the spring force of the spring 150 and the repulsive force between the moving iron core 110 and the stationary iron core 120). When this occurs, the moving iron core 110 moves upward, and the time-limiting switch A, the delay switch B, the first switch C, and the second switch D are opened, while the third switch E is closed.

[0050] When delay switch B is closed, the power supply provides current to the secondary coil 220 of the solenoid valve for a certain period of time (the delay time is set by delay switch B) before cutting off the power. If time limit switch A is closed, no current flows through the secondary coil 220 of the solenoid valve. Because delay switch B is closed and the delay time is started at the same time, the second switch D is closed, the first coil 130 is de-energized, and the third switch E is in the open state, so that the thermoelectric potential generated by thermocouple 300 passes through the main coil 210 of the solenoid valve, maintaining the open and closed state of the solenoid valve. At this time, the thermocouple 300 senses that ignition has been successful or that the ignition time has exceeded the time set by time limit switch A.

[0051] When the first switch C is turned off, the ignition system 400 stops discharging and igniting.

[0052] When timer switch A is turned off, the second coil 140 is de-energized, the solenoid valve secondary coil 220 is de-energized, and the ignition control circuit is shut down.

[0053] The delay time of delay switch B can be set to 3-5 seconds. The time limit switch can be set to 10 seconds.

[0054] The aforementioned gas stove ignition device, by setting a first coil 130 on the moving iron core 110, can automatically stop ignition after successful detection, avoiding waste of battery power; at the same time, by setting a delay switch B, it can continuously supply power to the solenoid valve for a period of time after successful ignition is detected, to prevent the solenoid valve from being unable to maintain its opening due to insufficient heating temperature of the thermocouple 300, thus improving the ignition success rate of the gas stove; by setting a time limit switch A, if ignition fails, the time limit switch A closes after a certain ignition time, shutting off the ignition control circuit, disconnecting the gas path, stopping ignition, and making gas use safer. Example 2

[0055] Reference Figures 4-6 This is a second embodiment of the gas stove ignition device of the present invention.

[0056] The gas stove ignition device includes an ignition switch 100, a solenoid valve, a thermocouple 300, an ignition control circuit, and a thermocouple control circuit.

[0057] See Figure 6 The ignition switch 100 includes a moving iron core 110 and a stationary iron core 120 spaced apart from each other, and a first coil 130 and a second coil 140 respectively sleeved on the moving iron core 110 and the stationary iron core 120. The moving iron core 110 can move up and down. The moving iron core 110 is connected to an elastic element, such as a spring 150, which can keep the moving iron core 110 and the stationary iron core 120 in a separated state.

[0058] The solenoid valve includes a valve body, a main solenoid coil 210, and a secondary solenoid coil 220. The solenoid valve is connected to the gas passage. The main solenoid coil 210 and the secondary solenoid coil 220 are used to control the valve body's movement.

[0059] See Figure 4 The ignition control circuit includes a first control circuit and an ignition system 400.

[0060] The first control circuit includes a power supply and a time-limited switch A connected to the power supply. The other end of the time-limited switch A is connected to the solenoid valve secondary coil 220, the second coil 140 and the first switch C respectively. The other end of the solenoid valve secondary coil 220 is connected to the time-delay switch B. The other end of the first switch C is connected to the ignition system 400. The other ends of the ignition system 400, the time-delay switch B and the second coil 140 are respectively connected to the power supply and form a circuit.

[0061] See Figure 5 The thermocouple control circuit includes a second control circuit and thermocouple 300.

[0062] The second control circuit includes a second switch D and a third switch E. One end of the second switch D is connected to the thermocouple 300, and the other end of the second switch is connected to the first coil 130. One end of the third switch E is connected to the thermocouple 300, and the other end of the third switch E is connected to the solenoid valve main coil 210. The other ends of the first coil 130 and the solenoid valve main coil 210 are connected to the thermocouple 300, forming a circuit.

[0063] See Figure 6 When the moving iron core 110 separates from the stationary iron core 120, the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D are open, and the third switch E is closed. Pressing the moving iron core 110 closes the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D, and opens the third switch E. When the second coil 140 is energized, the stationary iron core 120 becomes magnetic, allowing it to attract the moving iron core 110. The potential generated by the thermocouple, passing through the first coil 130, causes the moving iron core 110 to generate an electromagnetic field in the opposite direction to that of the stationary iron core. This creates a repulsive force between the moving iron core 110 and the stationary iron core 120, causing them to separate. This, in turn, opens the time-delay switch B, the time-limiting switch A, the first switch C, and the second switch D, and closes the third switch E. The generation of electromagnetic fields in opposite directions between the stationary iron core 120 and the moving iron core 110 can be achieved by reversing the direction of the current flowing into the first coil 130 and the second coil 140. Alternatively, the first coil 130 and the second coil 140 can be wound in opposite directions while current is passed through them in the same direction.

[0064] The working principle of the gas stove ignition device in this embodiment is as follows.

[0065] Pressing the moving iron core 110 causes the contacts of the four switches ABCDE to move downward a certain distance, closing the time-limited switch A, the delay switch B, the first switch C, and the second switch D, while opening the third switch E.

[0066] When delay switch B opens, time limit switch A opens simultaneously, power is supplied to the secondary coil 220 of solenoid valve, solenoid valve opens, thus opening the gas passage.

[0067] When delay switch B opens, first switch C opens simultaneously, and ignition system 400 begins discharge ignition.

[0068] Timer switch A is turned on, the second coil 140 is energized, so that the stationary iron core 120 has a magnetic field, so that the stationary iron core 120 and the moving iron core 110 are attracted together, keeping the ABCDE switch in the open and closed state. At the same time, timer switch A is set to a certain opening time. If the set time is exceeded, timer switch A (the main circuit switch) will automatically turn off to avoid gas leakage due to prolonged failure to ignite.

[0069] When the second switch D is opened, the potential generated by the thermocouple 300 passes through the first coil 130, causing the moving iron core 110 to generate an electromagnetic field in the opposite direction. A repulsive force is generated between the moving iron core 110 and the stationary iron core 120. When the gas is ignited, the flame heats the thermocouple 300 to a certain temperature. The generated thermoelectric potential makes the attraction force between the moving iron core 110 and the stationary iron core 120 less than the repulsive force (the sum of the spring force of the spring 150 and the repulsive force between the moving iron core 110 and the stationary iron core 120). When this occurs, the moving iron core 110 moves upward, and the time-limiting switch A, the delay switch B, the first switch C, and the second switch D are opened, while the third switch E is closed.

[0070] When delay switch B is closed, the power supply provides current to the secondary coil 220 of the solenoid valve for a certain period of time (the delay time is set by delay switch B) before cutting off the power. If time limit switch A is closed, no current flows through the secondary coil 220 of the solenoid valve. Because delay switch B is closed and the delay time is started at the same time, the second switch D is closed, the first coil 130 is de-energized, and the third switch E is in the open state, so that the thermoelectric potential generated by thermocouple 300 passes through the main coil 210 of the solenoid valve, maintaining the open and closed state of the solenoid valve. At this time, the thermocouple 300 senses that ignition has been successful or that the ignition time has exceeded the time set by time limit switch A.

[0071] When the first switch C is turned off, the ignition system 400 stops discharging and igniting.

[0072] When timer switch A is turned off, the second coil 140 is de-energized, the solenoid valve secondary coil 220 is de-energized, and the ignition control circuit is shut down.

[0073] The delay time of delay switch B can be set to 3-5 seconds. The time limit switch can be set to 10 seconds.

[0074] The aforementioned gas stove ignition device, by setting a first coil 130 on the moving iron core 110, can automatically stop ignition after successful detection, avoiding waste of battery power; at the same time, by setting a delay switch B, it can continuously supply power to the solenoid valve for a period of time after successful ignition is detected, to prevent the solenoid valve from being unable to maintain its opening due to insufficient heating temperature of the thermocouple 300, thus improving the ignition success rate of the gas stove; by setting a time limit switch A, if ignition fails, the time limit switch A closes after a certain ignition time, shutting off the ignition control circuit, disconnecting the gas path, stopping ignition, and making gas use safer. Example 3

[0075] Reference Figures 7-9 This is Embodiment 3 of the gas stove ignition device of the present invention.

[0076] The gas stove ignition device includes an ignition switch 100, a solenoid valve, a thermocouple 300, an ignition control circuit, and a thermocouple 300 control circuit.

[0077] See Figure 9 The ignition switch 100 includes a moving iron core 110 and a stationary iron core 120 spaced apart from each other, and a first coil 130 and a second coil 140 respectively sleeved on the moving iron core 110 and the stationary iron core 120. The first coil 130 and the second coil 140 are wound in opposite directions. The moving iron core 110 can move up and down. An elastic element, such as a spring 150, is connected to the moving iron core 110 to maintain the moving iron core 110 and the stationary iron core 120 in a separated state.

[0078] The solenoid valve has a main solenoid coil 210 and a secondary solenoid coil 220. The solenoid valve is connected to the gas passage.

[0079] See Figure 7 The ignition control circuit includes a first control circuit and an ignition system 400.

[0080] The first control circuit includes a power supply, a fourth switch F, a first switch C, and a solenoid valve sub-coil 220, all connected to the power supply. The other end of the fourth switch F is connected to a second coil 140, the other end of the solenoid valve sub-coil 220 is connected to a time delay switch B, and the other end of the first switch C is connected to an ignition system 400. The other ends of the ignition system 400, the time delay switch B, and the second coil 140 are all connected to the power supply and form a circuit.

[0081] See Figure 8 The thermocouple control circuit includes a second control circuit and thermocouple 300.

[0082] The second control circuit includes a second switch D and a third switch E. One end of the second switch D is connected to the thermocouple 300, and the other end of the second switch is connected to the first coil 130. One end of the third switch E is connected to the thermocouple 300, and the other end of the third switch E is connected to the solenoid valve main coil 210. The other ends of the first coil 130 and the solenoid valve main coil 210 are connected to the thermocouple 300, forming a circuit.

[0083] See Figure 9 When the moving iron core 110 separates from the stationary iron core 120, time-delay switch B, first switch C, second switch D, and fourth switch F are open, and third switch E is closed. Pressing the moving iron core 110 closes time-delay switch B, first switch C, second switch D, and fourth switch F, and opens third switch E. When the second coil 140 is energized, the stationary iron core 120 becomes magnetic, allowing it to attract the moving iron core 110. The potential generated by the thermocouple, passing through the first coil 130, causes the moving iron core 110 to generate an electromagnetic field in the opposite direction to that of the stationary iron core. This creates a repulsive force between the moving iron core 110 and the stationary iron core 120, causing them to separate. This, in turn, opens time-delay switch B, first switch C, second switch D, and fourth switch F, and closes third switch E. The generation of electromagnetic fields in opposite directions between the stationary iron core 120 and the moving iron core 110 can be achieved by reversing the direction of the current flowing into the first coil 130 and the second coil 140. Alternatively, the first coil 130 and the second coil 140 can be wound in opposite directions while current is passed through them in the same direction.

[0084] The working principle of the gas stove ignition device in this embodiment is as follows.

[0085] Pressing the moving iron core 110 causes the contacts of the four switches B, C, D, E, and F to move downward a certain distance, closing the time-delay switch B, the first switch C, the second switch D, and the fourth switch F, while opening the third switch E.

[0086] When delay switch B is turned on, the power supply provides power to the secondary coil 220 of the solenoid valve, causing the solenoid valve to open and thus opening the gas passage.

[0087] When the first switch C is turned on, the ignition system 400 begins to discharge and ignite.

[0088] When the fourth switch F is opened, the second coil 140 is energized, giving the stationary iron core 120 a magnetic field, which causes the stationary iron core 120 to attract the moving iron core 110, maintaining the open / closed state of the BCDEF switch.

[0089] When the second switch D is opened, the potential generated by the thermocouple 300 passes through the first coil 130, causing the moving iron core 110 to generate an electromagnetic field in the opposite direction. A repulsive force is generated between the moving iron core 110 and the stationary iron core 120. When the gas is ignited, the flame heats the thermocouple 300 to a certain temperature. The generated thermoelectric potential makes the attraction force between the moving iron core 110 and the stationary iron core 120 less than the repulsive force (the sum of the spring force of the spring 150 and the repulsive force between the moving iron core 110 and the stationary iron core 120). When this occurs, the moving iron core 110 moves upward, and the time delay switch B, the first switch C, the second switch D, and the fourth switch F are opened, while the third switch E is closed.

[0090] When delay switch B closes, the power supply provides current to the secondary coil 220 of the solenoid valve for a certain period of time (the delay time is set by delay switch B) before cutting off the power. Simultaneously with the closure of delay switch B and the activation of the delay time, the second switch D closes, the first coil 130 is de-energized, and the third switch E is open. This allows the thermoelectric potential generated by thermocouple 300 to pass through the main coil 210 of the solenoid valve, maintaining the open / closed state of the solenoid valve. At this point, thermocouple 300 senses successful ignition.

[0091] When the first switch C is turned off, the ignition system 400 stops discharging and igniting.

[0092] When the fourth switch F is turned off, the second coil 140 is de-energized, the solenoid valve secondary coil 220 is de-energized, and the ignition control circuit is shut down.

[0093] The delay time of delay switch B can be set to 3~5 seconds.

[0094] The gas stove ignition device described above, by setting a first coil 130 on the moving iron core 110, can automatically stop ignition after detecting successful ignition, thus avoiding the waste of battery power; at the same time, by setting a delay switch B, it can continuously supply power to the solenoid valve for a period of time after detecting successful ignition, thus avoiding the inability to keep the solenoid valve open due to insufficient heating temperature of thermocouple 300, thereby improving the ignition success rate of the gas stove.

[0095] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A gas stove ignition device, characterized in that, include: The ignition switch (100) is configured to be pressable; Ignition control circuit, including ignition system (400) and first control circuit; Thermocouple control circuit, including at least one thermocouple (300) and a second control circuit; The solenoid valve is used to control the opening and closing of the gas passage and is connected to the first control circuit and the second control circuit. The first control circuit and the second control circuit are also connected to the ignition switch (100). By pressing the ignition switch (100), the first control circuit and the second control circuit can be switched to the first control state. The thermocouple (300) is configured to sense the temperature of the gas stove and, when the preset temperature is reached, control the first control circuit and the second control circuit to switch to the second control state. In the first control state, the solenoid valve opens, and the ignition system (400) is energized and operates. In the second control state, the solenoid valve remains open, and the ignition system (400) is de-energized and shut down; The ignition switch (100) includes a moving iron core (110) and a stationary iron core (120) arranged at relative intervals, and a first coil (130) and a second coil (140) respectively sleeved on the moving iron core and the stationary iron core. The first coil (130) is connected to the second control circuit, and the second coil (140) is connected to the first control circuit; When the second coil (140) is energized, the stationary iron core (120) and the moving iron core (110) are attracted together; When the thermocouple (300) reaches a preset temperature, the potential generated passes through the first coil (130), causing the moving iron core (110) to separate from the stationary iron core (120).

2. The gas stove ignition device according to claim 1, characterized in that, The solenoid valve includes a valve body, a main solenoid coil (210), and a secondary solenoid coil (220). The main solenoid coil (210) and the secondary solenoid coil (220) are used to control the valve body. The main solenoid coil (210) is connected to a second control circuit, and the secondary solenoid coil (220) is connected to a first control circuit.

3. The gas stove ignition device according to claim 2, characterized in that, The first control circuit includes a power supply and a time-limited switch A connected to the power supply. The other end of the time-limited switch A is connected to a delay switch B and a second coil (140). The other end of the delay switch B is connected to a solenoid valve sub-coil (220) and a first switch C. The other end of the first switch C is connected to an ignition system (400). The other ends of the ignition system (400), the solenoid valve sub-coil (220), and the second coil (140) are connected to the power supply and form a circuit.

4. The gas stove ignition device according to claim 3, characterized in that, The second control circuit includes a second switch D and a third switch E. One end of the second switch D is connected to a thermocouple (300), and the other end of the second switch D is connected to a first coil (130). One end of the third switch E is connected to a thermocouple (300), and the other end of the third switch E is connected to a solenoid valve main coil (210). The other ends of the first coil (130) and the solenoid valve main coil (210) are connected to the thermocouple (300) to form a circuit.

5. The gas stove ignition device according to claim 2, characterized in that, The first control circuit includes a power supply and a time-limited switch A connected to the power supply. The other end of the time-limited switch A is connected to the solenoid valve sub-coil (220), the second coil (140), and the first switch C, respectively. The other end of the solenoid valve sub-coil (220) is connected to the time-delay switch B. The other end of the first switch C is connected to the ignition system (400). The other ends of the ignition system (400), the time-delay switch B, and the second coil (140) are connected to the power supply, forming a circuit.

6. The gas stove ignition device according to claim 2, characterized in that, The first control circuit includes a power supply, a fourth switch F, a first switch C, and a solenoid valve sub-coil (220) respectively connected to the power supply. The other end of the fourth switch F is connected to the second coil (140), the other end of the solenoid valve sub-coil (220) is connected to the time delay switch B, and the other end of the first switch C is connected to the ignition system (400). The other ends of the ignition system (400), the time delay switch B, and the second coil (140) are respectively connected to the power supply and form a circuit.

7. The gas stove ignition device according to claim 1, characterized in that, The ignition switch (100) also includes an elastic element (150), which is connected to the moving iron core (110) and is used to separate the moving iron core (110) from the stationary iron core (120).

8. The gas stove ignition device according to claim 3, characterized in that, The delay time of the delay switch B is 3~5s; the set time of the time limit switch A is 10s.

9. A gas stove, characterized in that, Includes the gas stove ignition device as described in any one of claims 1-8.

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