Introduction To The Working Principle Of Rice Cookers

Place the inner pot containing the food on the heating plate, ensuring that its bottom is in contact with the temperature sensitive soft magnet at the center of the heating plate. Press the piano key switch, and the permanent magnet below the soft magnet will rise to contact the soft magnet; At this point, the pot has not yet heated up, and the soft magnet is below the Curie temperature, exhibiting good ferromagnetism. It can be magnetized by a permanent magnet and held at a high point. The permanent magnet drives the internal lever action, connecting the upper and lower contacts of the circuit. The electric heating element is powered on to generate heat, and the food in the pot is heated up. When the temperature at the bottom of the inner pot reaches 103 ± 2 ℃ (which is the Curie temperature of the soft magnet), the soft magnet immediately senses and loses its magnetism. The permanent magnet falls from the high point position under the combined action of gravity and internal spring, and thus drives the lever mechanism to detach the upper and lower contacts of the circuit, disconnect the circuit, and the electric heating element no longer heats up, achieving the purpose of temperature limitation. But at this time, the heating plate is still in a high heat state with a large heat capacity, which can continue to heat the food in the pot for a period of time until it is fully cooked. In order to maintain the food at a suitable temperature, some rice cookers are also equipped with low-power heating circuits, controlled by a bimetallic thermostat to regulate their operating temperature.