Patent ID: 8299407

Claim:
An electromagnetic induction heating device provided with a resonant circuit having an induction heating coil ( 26 ) which heats an object to be heated ( 38 ), and a switching circuit which supplies a high-frequency current to the resonant circuit, characterized in that the induction heating coil ( 26 ) includes a plurality of first coils ( 30 , 32 ) connected in parallel to one another, and a second coil ( 28 ) connected in series to each of the first coils ( 30 , 32 ), and the individual coils ( 28 , 30 , 32 ) are arranged substantially concentric on a substantially same plane, the resonant circuit is divided with each of the first coils ( 30 , 32 ) and the second coil ( 28 ) as a set, and the independent switching circuits ( 16 , 18 ) are connected to the respective resonant circuits ( 20 , 22 ).