The function of gas stove solenoid valve, the working principle of gas stove solenoid valve

The function of the gas stove solenoid valve

The function of the gas stove solenoid valve is to automatically shut off the gas when there is no fire burning to avoid gas poisoning. At present, gas stove solenoid valves can be divided into two types, one is a thermocouple solenoid valve, and the other is an ion flameout solenoid valve. Let’s introduce the flameout solenoid valve. It is large in size and is connected to the universal joint at the end of the gas pipe. When we press the knob, we touch the micro switch. After the pulse igniter detects it, it pulls in Solenoid valve, when flameout occurs, it is first detected by the ion flameout that there is no current flowing through it. , the pulse igniter responds and starts a countdown. If the partial flame is caused by excessive wind, the flame will return to the normal state within a few seconds. If the flame is turned off, there will be no current passing through during the countdown, then the microcontroller will It reacts and cuts off the current of the solenoid valve, thus turning off the gas and avoiding the accident.

Working principle of gas stove solenoid valve

inGas stove There is a closed cavity in the solenoid valve, with through holes at different positions. Each through hole is connected to a different oil pipe. There is a piston in the middle of the cavity and two electromagnets on both sides. Which side of the magnet coil passes through the valve body will be attracted to which side. By controlling the movement of the valve body to open or close different oil drain and exhaust holes, while the oil inlet hole is normally open, the hydraulic oil will enter different oil drain pipes. Then the piston of the oil cylinder is pushed by the pressure of the oil, and the piston drives the piston rod, which drives the mechanical device.

When the thermocouple in the gas stove solenoid valve is heated, a thermoelectric potential will be generated, which can make the solenoid valve work.

The working principle of a gas stove: When the knob is pressed and a small fire is ignited, the thermocouple is heated by the flame and generates a thermoelectric potential. The thermoelectric potential is introduced into the electromagnetic coil through the wire, and a magnetic field is generated to attract the solenoid valve, open the gas valve, and open the combustion path to maintain normal combustion. Once there is strong wind or soup water overflows, the flame is extinguished, and the thermoelectric potential of the thermocouple quickly drops to Zero, the coil loses power and the solenoid valve fails. It quickly resets under the action of the spring. The valve closes the gas path and terminates the gas supply to ensure safety.

Gas stove Thermocouple protection device, pay attention to keep the distance between the thermocouple and the fire cover.

Generally speaking, the height of gas stove thermocouple should be basically the same as the height of the fire cover, and the allowable error is 1±0.5mm, Gas stove The distance between the thermocouple and the fire cover should not be too far. Generally, the best distance is 4±0.5mm. If the installation position is too low, Gas stove The thermocouple is not heated enough and the thermoelectric potential generated is not enough, which will not cause Solenoid valve is closed and the installation position is too If it is too high, the flame contact will be too large and the thermocouple will be easily burned out. In the same way, if it is too far, the thermal potential will be insufficient and the solenoid valve will not close.

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