Why is the electric kettle automatically power-off after the water is opened?
According to the principle of thermal expansion and contraction of object. Thermal expansion and contraction are the general characteristics of objects, but the degree of thermal expansion and contraction of different objects is different. With metal sheet copper made into contact. Because of thermal expansion and contraction of copper sensitive so in the temperature does not reach the set value of the copper, the metal plate is a curved shape, when the contact is closed. In the water is heated to a temperature of the water when the heat conduction to the copper copper thermostat in the above because the heat will play into contact with the off state. When the temperature drop of copper restored to the original state of the contact switch into electrical heating state. Two double gold sheet is a conductor of different substances, changes in temperature due to expansion is not the same degree of the dual metal sheet bending, meet or contact the switch is set, so that the set circuit starts to work. This is more direct and timely, accurate induction of water temperature.
The electric kettle liner inlaid with a temperature controller... That is making contact with the degree of metal sheet copper. Because of thermal expansion and contraction of copper sensitive so in the temperature does not reach the set value of the copper, the metal plate is a curved shape, when the contact is closed connected. When the circuit is switched on the kettle can be heated to the set temperature... In the water heating kettle and the heat conduction to the thermostat in the above copper copper because of heating will play into contact with the off state. When the temperature drop of copper restored to the original state of the contact switch into electric heating thermostat electric cooker... This principle and we the family is the same.....
Automatic temperature control circuit is a pot of water to boil the kettle off. The series of temperature sensor circuit. The boiling point of water is one hundred degrees, when the water boil temperature will exceed one hundred degrees, when the temperature sensor will disconnect the circuit. The temperature sensor is simple bimetal, commonly used in electric iron electric water heater appliances. Many kinds of temperature sensors. And the semiconductor temperature sensor. It has the advantages of simple structure, safe use, good reliability.
