Safe design of stainless steel electric kettle

The first stage: steam switch, when the water boils, the steam switch will operate, so that the kettle is powered off;

The second layer: dry burning protection, if the steam switch is not activated, the water will continue to burn and continue to decrease, when the water is lower than the minimum water level or burned dry, the bimetal sheet on the other temperature control will act, so that the kettle is powered off;

Third: If the above loses its effect, as the temperature rises, a plastic pusher in the thermostat will melt, causing the kettle to be powered off.