Ultrasonic dishwasher system
OwnerDavid H. Evansinventor
Life of this patent
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Abstract
An improved dishwasher system utilizes ultrasonic signals to clean a wide range of kitchen and/or dining ware items. The system includes one or more ultrasonic signal generators submerged within a water bath and regulated by a controller to generate an ultrasonic signal, resulting in the production of a large quantity of cavitation bubbles which implode with a vigorous cleaning action against submerged kitchen ware items. The controller rapidly varies the specific frequency of the generated ultrasonic signal, preferably in conjunction with a rapid on-off pulse cycling of the signal, to prevent damage to or breakage of fragile ware items.
Claims16
An ultrasonic dishwasher system, comprising:
- a water bath for receiving ware items to be cleaned;
- at least one ultrasonic signal generator submerged within said water bath;
- and
- a controller for operating said signal generator to produce a succession of short burst ultrasonic signals for generating a large quantity of cavitation bubbles within said water bath, said controller including means for rapidly pulsing said signal generator between off and n states of substantially uniform duration, and for generating different specific ultrasonic signal frequencies within a selected frequency range for successive on states.
An ultrasonic cleaning system, comprising:
- an upwardly open tank for receiving a water bath, and for receiving items to be cleaned within the water bath;
- at least one ultrasonic signal generator mounted within said tank at a location submerged within the water bath when the water bath is within said tank;
- and
- a controller for operating said signal generator to produce a succession of short burst ultrasonic signals for generating a large quantity of cavitation bubbles within said water bath, said controller including means for rapidly pulsing said signal generator between off and on states of substantially uniform duration and for generating different specific ultrasonic signal frequencies within a selected frequency range for successive on states.
Dependencies are inferred from the claim text.