Automatic Gas Shut-off Protection Device When Flameout

There are currently two types of flameout protectors in the gas stove market. One is a thermocouple flameout protection device, and the other is an ion induction pin flameout protection device. The two flameout protection devices have a small share in the gas stove market. Up and down.

Thermoelectric gas stove flameout protection device, the two ends of the induction probe are made of different materials, usually the tip is nickel-chromium alloy, and the long bottom is composed of nickel-silicon alloy. When the temperature difference is large, electromotive force can be generated. That is, it can appear as a battery.
The advantage of the thermocouple flameout protection device is that the circuit is simple and reliable. The disadvantage is that the thermal inertia is large. When igniting, you must press the button for 10 to 15 seconds and then release it to let the small fire heat the thermocouple for a period of time. Otherwise, the thermocouple may be The generated current is not enough, and the magnetic force of the solenoid valve is not enough to offset the elastic force of the spring, causing the valve disc to move upward, and the small fire that was lit goes out again.

The design of the ion induction gas stove flameout protection device is roughly the same as that of the thermoelectric circuit, except that it uses the power of the battery installed in the gas stove itself to drive the work. When the flame burns, it becomes a connected potential loop, and the flame is conductive. , in the loop, the solenoid valve for flameout protection plays the role of line transmitter. Therefore, as long as the flame goes out, the circuit is disconnected and the valve can return immediately. Therefore, the advantage of gas stove ion induction flameout protection is rapid response. The disadvantage is that a small flame fluctuation or a small environmental impact may cause the flameout device to accidentally disconnect, causing the gas stove to flameout.