POWER SUPPLY CIRCUIT DRIVER

摘要

A heat exchange cooling device not continuously radiating high-frequency noise radio waves and installed with a small number of steps of installation and a power supply circuit driver are provided. A commercial power supply transformer (311) for transforming the voltage of a commercial AC power supply (307) supplied from a heater container into a voltage in a predetermined voltage range is provided. First and second relays (210, 212) for automatically selecting taps provided to the windings of a commercial power supply transformer (311) for transforming a commercial AC nominal voltage in a wide range from 200 to 250V into a voltage in a predetermined output voltage range are provided.