The whistle type electric kettle is made of stretched aluminum plate, and the electric heating element adopts a submerged nickel plated steel sealed electric heating tube. The electric heating tube is installed at the bottom of the kettle, and a heat-resistant sealing ring is padded at the junction with the kettle body to prevent water leakage. This type of electric kettle is equipped with a strip shaped vibrating spring plate buzzer (air flow vibrating whistle device) on the lid, which will sound when the water temperature reaches 100 ℃ or above. Due to the fact that this type of kettle is generally not equipped with a temperature limiting controller, it is necessary to manually cut off the power supply. This type of electric kettle has a simple structure and low price, and is widely used in residential households.

The working principle of an electric kettle is that the steam generated during water boiling causes the bimetallic sheet of the steam temperature sensing element to deform, and this deformation drives the power switch to cut off power through the lever principle. Its power outage is non self resetting, so the kettle will not automatically reheat after the power outage.