Abstract:
A feedback oscillator circuit provides a load waveform which is intentionally distorted, delivering plural and shifting frequency energy to and from a piezoelectric crystal transducer which operates an ultrasonic cleaner; the transducer is thus made to vibrate in timed bursts, while automatically shifting between different predominant frequencies during each burst. By adjusting specific circuit components, the duration and timing of predominant frequencies generated by the circuit is controlled. This automatic frequency shifting mode of operation provides improved cavitation, controllable for a specific desired result, and therefore provides superior cleaning in the cleaning tank.
Abstract:
Apparatus for supplying ultrasonic energy to a dishwasher consisting of a piezoelectric transducer arrangement associated with the washer chamber and a saturable core transformer, inverter-type circuit for energizing the transducers at high frequencies. Line voltage is utilized as the power source and ''''ripple voltage'''' provides variation in the inverter output frequency to prevent standing waves of ultrasonic energy in the washer chamber.
Abstract:
본 발명은 안정되게 높은 입자 제거 효율을 얻을 수 있는 초음파 세정 방법을 제공하는 것을 목적으로 한다. 초음파 세정 방법은, 기체가 용존된 용액에 초음파를 조사함으로써 용액 중의 세정 대상물을 세정하기 위한 초음파 세정 방법으로서, 이하의 단계를 포함하고 있다. 제1 용존 기체 농도를 갖는 용액에 초음파가 조사된다. 용액에 초음파를 조사하는 상태에서, 용액 중의 용존 기체 농도가 제1 용존 기체 농도로부터 제1 용존 기체 농도보다 낮은 제2 용존 기체 농도로 변경된다. 제1 용존 기체 농도로부터 제2 용존 기체 농도까지 용액 중의 용존 기체 농도가 변경되는 동안, 용액에 초음파를 조사함으로써 소노루미네센스가 발생한다.
Abstract:
PURPOSE: An ultrasonic cleaning method is provided to easily clean an object in a solution by irradiating ultrasonic waves to the solution with a dissolved gas. CONSTITUTION: The dissolved gas concentration of a solution is controlled to a first dissolved gas concentration (S11). The irradiation of ultrasonic waves to the solution with the first dissolved gas concentration is started (S12). The dissolved gas concentration of the solution is controlled to a second dissolved gas concentration (S13). The irradiation of the ultrasonic waves is stopped (S14). [Reference numerals] (S11) Dissolved gas concentration is controlled to a first dissolved gas concentration; (S12) Irradiation of ultrasonic waves is started; (S13) Dissolved gas concentration of the solution is controlled to a second dissolved gas concentration; (S14) Irradiation of the ultrasonic waves is stopped