| 摘要 |
PURPOSE:To synthetically reduce cost by providing a heater power supply part for triggering a bi-directional switching means so that a prescribed current may flow in accordance with the voltage of a commercial power supply to be inputted. CONSTITUTION:The above device is provided with the heater power supply part 8 which is constituted of the bi-directional switching means 60 and the triggering controlling means 7 for triggering the bi-directional switching means 60 so that full-wave current may flow at the time of inputting AC/100V system in accordance with the voltage of the commercial power supply to be inputted, and at the time of inputting AC/200V system, after the half-wave current flows, the following half-wave current may flow after the off-period of one cycle passes. Then, the heater 25 can be unifiedly used for the AC/100V system. Thus, the host can be synthetically reduced. |
