| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control energization of a heating coil, control temperature of oil safely, and prevent abnormal heating of the oil coping with both states of an amount of the oil in a pot and warpage of the pot. <P>SOLUTION: A control means controls energization of the heating coil by receiving a detected signal from a temperature detecting element to detect the temperature of the pot, and a timing means to measure time and send a signal. A gradient t of temperature rise is obtained by the temperature by the temperature detecting element and the time by the timing means, a heating energization rate is made to be changed corresponding to the gradient of this temperature rise, the gradient t of the temperature rise is detected in a temperature region in which the amount of the oil in the pot does not effect on temperature changes of the temperature detecting element, and this is controlled so that the smaller the gradient t of the temperature rise is, the smaller the energization rate of the heating coil becomes. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
