| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of impressing ultrasonic wave without using any devices like an ultrasonic vibrator or another driving circuit for applying ultrasonic vibration on a cooking pot. <P>SOLUTION: The induction heating cooker comprises an inverter circuit 12 connected to the output side of a rectifying circuit 11, for converting a current into high frequency current; heating coils 5 connected to the output side of the inverter circuit, for induction-heating the cooking pot 4; a magnetic flux modulation plate 8 arranged upon the heating coil, for reflecting the high frequency alternating magnetic field generated at the heating coil; driving frequency control means 13, 14 for outputting a driving signal changing the driving frequency for detecting a resonant frequency of the cooking pot to the inverter circuit; a vibration sensor 7 for detecting the vibration of the cooking pot; a resonant frequency detecting means 16 for detecting the resonance frequency of the cooking pot depending on the output of the vibration sensor; and a control part 21 for making the driving signal of the resonant frequency detected by the resonant frequency detecting means output from the driving frequency control means. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
