To provide a high frequency induction heating device of which, drop of induction heating efficiency caused by the change in the distance between an induction heating coil and the object to be heated, is eliminated, the required heating time is shortened, treating capacity is improved, power source with big capacity is not used, and treatment cost is reduced.
Even when heating various objects to be heated with various outside dimension, by applying a changeable periphery length induction heating coil, the fluctuation of induction heating efficiency caused by the difference of outer dimension of the object to be heated is eliminated, and the treatment capacity is improved by heightening the efficiency by shortening the time required for heating, and the treatment cost is reduced by using a power supply source of small capacity and low cost.
OSAKABE TAKAYUKI
SAWADA KATSUYA
MATSUDA YUTAKA
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