| 摘要 |
A heating element (701) includes an excitation coil (702) disposed adjacent the heating element (701); a voltage source (710) for applying to the excitation coil (702) a high frequency electric power provided by modulating an input AC electric power with a high frequency, wherein the heating element (701) is heated by induction by the excitation coil (702) supplied with the high frequency electric power, wherein the heating element (701) has a characteristic frequency which is unequal to integer multiples of a frequency of the the AC electric power. <IMAGE> |
