Electric kettle switch installation and principle

First, the working principle of the electric kettle is: using the water vapor generated when the water boils to deform the bimetal of the steam sensing element, and using the principle of the lever to push the power switch, thereby automatically turning off the electric kettle after the water is boiled. . The power failure is not self-resetting, so the kettle will not automatically reheat after the power is turned off.

Second, the triple safety protection device of the electric kettle:

         The first weight: steam switch, when the water boils, the steam switch will act to make the kettle power off; the second weight: dry burning protection, if the steam switch does not move, the water will continue to burn and continue to decrease, when the water is below the minimum When the water level is dry or dried, another bimetal on the temperature control will act to de-energize the kettle; the third weight will lose its effect as above, and as the temperature rises, a plastic pusher in the thermostat will melt. To de-energize the kettle.

   After the electric kettle is turned on, the water temperature gradually rises to 100 degrees, the water begins to boil, and the steam impacts the bimetal on the steam switch. Due to the expansion and contraction, the bimetal expands and deforms, and the top open switch contacts are disconnected. power supply. If the steam switch fails, the water in the kettle will continue to burn until the water is dried, and the temperature of the heating element rises sharply. There are two bimetals at the bottom of the heating plate, which will rise sharply due to heat conduction, and will expand and deform. Turn on the power. Therefore, the safety protection device of the electric kettle is designed to be very scientific and reliable. This is the triple safety principle of the electric kettle.