Currently, the world's more popular off protection is thermocouple, its working principle is the thermocouple is heated, it will generate thermoelectric power, the solenoid valve can work potential. Specific gas stove works as follows: When you press the knob, a small fire ignited, by its flame heating the thermocouple, thermoelectric power generation. Thermoelectric power through the wires into the electromagnetic coil to generate a magnetic field pull the solenoid valve, gas valve is open, open burning pathways to maintain its normal combustion in the event of high winds or other spill soup, extinguish the flame, the thermocouple thermoelectric power drops quickly to zero, the coil de-energized, the solenoid valve fails, reset rapidly under the action of the spring, the valve closes the gas path, terminate gas supply, and ensure safety.
  Stove thermocouple protection device should be taken to keep the thermocouple and the distance between the fire cover. Generally speaking, the thermocouple height should be basically the same height with fire cover, allowing the error is 1 � 0.5mm, thermocouple and fire cover distance can not be too far away, is generally maintained at 4 � 0.5mm distance of the best, if the installation location is too low, insufficient heat the thermocouple to generate thermoelectric power is not enough, do not pull the solenoid valve, the installation location is too high, the flames touch too easy to burn the thermocouple, the same way, too far, will thermoelectric power is not enough, not will pull solenoid valve