Electric rice cooker, also known as electric cooker, electric rice cooker. It is a cooking utensil that converts electrical energy into thermal energy. It has various operating functions such as steaming, boiling, stewing, and simmering food, making it convenient, safe, and reliable to use. It can not only cook food, but also keep it warm, clean and hygienic when used, without pollution, time-saving and labor-saving. It is one of the indispensable tools for modern household chores. During World War II, common electric rice cookers were divided into three categories: automatic insulation, timed insulation, and new microcomputer controlled ones. The world's first rice cooker was invented in the 1950s by the Tokyo Communication Engineering Company of Inoue University in Japan. The invention of the rice cooker has reduced the time spent on cooking in many households and has become a daily household appliance. The main structure of a regular rice cooker is composed of a heating plate, a temperature limiter, an insulation switch, a lever switch, a current limiting resistor, an indicator light, and a socket. The heating plate is the main heating element of the rice cooker. It is an aluminum alloy disc with an embedded electric heating tube, and the inner pot is placed on top of it. You can see it by removing the inner pot. Temperature limiter, also known as magnetic steel. It is equipped with a permanent magnetic ring and a spring inside, which can be pressed and located in the center of the heating plate. When cooking, when the cooking switch is pressed, the lever switch is driven by the suction of the magnetic steel to keep the power contact connected. When cooking rice, the temperature at the bottom of the pot continuously increases, and the suction of the permanent magnetic ring decreases with the increase of temperature. When the water in the inner pot is evaporated and the temperature at the bottom of the pot reaches 103 ± 2 ℃, the suction of the magnetic ring is less than the elasticity of the spring on it, and the temperature limiter is pushed down by the spring to drive the lever switch and cut off the power
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