| 摘要 |
PURPOSE:To vary the heating time by judging the content of a beverage can on the basis of input voltage value and coil current value at the time of heating, controlling the oscillating time of a voltage type resonance inverter circuit on the basis of the result from said judgement, and thereby automatically judging the contents of different cans. CONSTITUTION:A can content judging means 17 judges the content of beverage can 2 on the basis of the voltage value sensed by a voltage sensing circuit 14, when the cans 2 are heated, and the coil current value sensed by a coil current sensing circuit 15. On the basis of result from this judgement, a heating time determining means 18 determines the heating time in compliance with the content of applicable can 2, and the oscillating time of a voltage type resonance inverter circuit 11 is controlled with a timer 21 in conformity to a control signal given by the heating time determining means 18. Thus enables induction heating of cans 2, wherein the heating time is varied automatically according to the content of the applicable can 2. |
