| 摘要 |
PURPOSE:To make a sale temperature stable by correcting the input voltage characteristic of a voltage type resonance inverter circuit by plural correction circuits, making input current characteristics when the characteristics are coupled and a heating output is fixed and controlling an input current by using the approximated characteristic. CONSTITUTION:For the input voltage characteristic, which is detected by an input voltage detection circuit 21, of a voltage type resonance inverter circuit 6, the characteristic is corrected by plural correction circuits 22a-22n and the corrected characteristic is selected by a select circuit 23. When the heating output of the coupled voltage type resonance inverter circuit 6 is fixed, the input current characteristic is approximated and the input current is controlled in an oscillation control circuit 18 by using the approximated characteristic. Thus, the heating output is fixed and without being affected by the input voltage, a canned drink commodity can be heated for a fixed time with the fixed heating output. |
