| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a stable reduction effect of unnecessary radiation noise by periodically varying input current so as to periodically varying the operation frequency of a heating coil so as to periodically disperse energy of the unnecessary radiation noise in a rice cooker for carrying out induction heating of a pot with the heating coil. <P>SOLUTION: A switching means 6 is connected serially with the heating coil 2 which carries out induction heating of the pot 1. An AC power source 7 is rectified by a rectification means 8 to supply power to the heating coil 2. Input current supplied from the AC power source 7 is detected by an input current detection means 12. A target value of the input current is set by an input current setting means 15. The target value of the input current is varied periodically with a prescribed amplitude by a setting current variation means 16. The on time of the switching means 6 is set by an on time setting means 17. The on time setting means 17 sets the on time of the switching means 6 according to the output values of the input current detection means 12 and the setting current variation means 16. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
