Patent ID: 7202451
Filing Date: 2007-04-10
Classification: A45D,H05B

Abstract:
1. An induction heating unit, comprising: resonance-type inverters respectively corresponding to a plurality of heating coils; a reference signal generating section for generating a reference signal to be given to these inverters; phase detectors which are provided to respectively correspond to said resonance-type inverters, each obtaining a phase difference between a current supplied to the corresponding one of said heating coils and the reference signal outputted by said reference signal generating section; and drive control sections which are provided to respectively correspond to said resonance-type inverters, for driving said resonance-type inverters while controlling a drive signal to be given to the corresponding one of said resonance-type inverters based on the phase difference obtained by said phase detector and said reference signal to equalize a frequency of the current supplied to each of said heating coils to said reference signal as well as to have a phase of the current synchronized with said reference signal or maintained at a phase difference to be set, wherein a heating temperature to be reached by each of said plurality of heating coils is controlled to a predetermined temperature.