Insulation type automatic rice cooker circuit

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The principle of heat preservation of the rice cooker is: in the state of heat preservation, as time goes by, the temperature of the rice in the inner pot drops, causing the temperature of the main thermostat to drop, and when the microcomputer detects the temperature of the main thermostat drops to the control temperature of the heat preservation, the electric heating is driven. The power of the disk is re-powered, the temperature rises, and the temperature of the main thermostat rises. When the microcomputer detects the temperature rise of the main thermostat, the electric heating plate is powered off and the temperature drops, the temperature of the main thermostat drops, repeating the above Circulate to keep the rice cooker in the heat preservation process.