| 摘要 |
A displaying device for the movement condition of an ultrasonic cleaner is provided to prevent ultrasonic oscillator from being damaged by the shortage of the washing water. A displaying device for the movement condition of an ultrasonic cleaner comprises an output transformer driving part(5), an ultrasonic oscillator(7), a current sensor(9A), a voltage sensor(9B), and a microcomputer(10). The output transformer driving part drives two switching transistors. The vibrator is driven by the output transformer driving part. The ultrasonic oscillator vibrates the washing water of a washing tub(8) with the ultrasonic wave. The current sensor and the voltage sensor respectively detect the current and voltage of the ultrasonic oscillator. The microcomputer detects and displays the short-circuit or the disconnection of the ultrasonic oscillator based on an output signal of the current sensor and the voltage sensor. The microcomputer detects and displays on a display unit the state of the load based on the impedance and phase change of the ultrasonic oscillator.
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