| 摘要 |
Defrost method for accurately defrosting food to be defrosted, regardless of frozen degree and presence/absence of receptacle for food to be defrosted. The defrosting method includes the steps of: determining an initial value by detecting a surface temperature of food to defrost; determining a defrost completion value in accordance with the initial value which is determined in the step of determining the initial value; detecting a current value of an infrared sensor at a regular time basis while driving a magnetron; and completing the defrosting process if the current value reaches the completion value. An output value of the infrared sensor is detected at a predetermined regular time basis while a rotatable tray for placing the food is rotated, and the initial value is obtained from the lowe st output value among a plurality of output values which are detected. A gap between the initial value and the completion value is divided into at least two divisions, and a power rat e of the magnetron is varied in accordance with the respective divisions. The power rate of the magnetron of the respective divisions, is decreased from the value which is closer to the initial value to the value which is closer to the completion value.
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