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1. Thermocouple-type flameout protection device: It consists of a thermocouple and a solenoid valve. The solenoid valve is further divided into single-wire and double-wire types. The single-coil solenoid valve does not require battery current during operation, so the cost is relatively low. However, when starting, you need to press the switch and hold it for 4-6 seconds after ignition to allow the thermocouple to heat up and the solenoid valve to engage, maintaining the suction state (converting thermal energy into electrical energy). The double-coil solenoid valve has a delay device. Initially, the valve is opened by battery current supplied to the solenoid valve for about 6-8 seconds. After 6-8 seconds, the current disappears, and the solenoid valve operates using the thermoelectric potential generated by the thermocouple. Therefore, the double-coil solenoid valve is sometimes called a zero-second valve, as you can release it immediately after pressing. Its disadvantage is that it requires ignition controller current to open the valve at startup, making it more costly than the single-coil solenoid valve. (1 day ago)


2. The thermocouple is heated by the flame to generate a thermoelectric potential, and its current can keep the gas solenoid valve engaged. When the flame goes out, the current is lost, and the gas valve closes. (2 days ago)


3. The thermocouple is heated by the flame to generate a thermoelectric potential, and its current can keep the gas solenoid valve engaged. When the flame goes out, the current is lost, and the gas valve closes. (5 days ago)


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The thermocouple is heated by the flame to generate a thermoelectric potential, and its current can keep the gas solenoid valve engaged. When the flame goes out, the current is lost, and the gas valve closes. (6 days ago)


5. The thermocouple is heated by the flame to generate a thermoelectric potential, and its current can keep the gas solenoid valve engaged. When the flame goes out, the current is lost, and the gas valve closes. I am very happy to answer for you. (7 days ago