The burner of a household gas stove is usually equipped with an ignition needle and a thermocouple flameout protection needle. The thermocouple is a very important part of the gas stove. The quality of the thermocouple is related to the ignition reaction time and the ignition success rate of the gas stove. The thermocouple is actually a kind of temperature sensing element, it directly measures the temperature, and converts the temperature signal into a thermoelectromotive force signal, which is converted into the temperature of the measured medium through an electrical instrument.
thermocouple is a combination of two different alloy materials. Different alloy materials will produce different thermoelectric potentials under the action of temperature, and thermocouples are manufactured by using the different thermoelectric potentials produced by different alloy materials under the action of temperature. Two conductors of different components are connected to a composite circuit at both ends. When the temperature of the junction is different, an electromotive force will be generated in the circuit. This phenomenon is called thermoelectric effect, and this electromotive force is called thermoelectric potential. Thermocouples use this principle to measure temperature. Among them, the end that is directly used to measure the temperature of the medium is called the working end, and the other end is called the cold end; the cold end is connected to a display instrument or a supporting instrument, and the display instrument will indicate the temperature generated by the thermocouple. The thermoelectric potential.