Adaptive fill for dishwashers

Details Adaptive fill for dishwashers Adaptive fill for dishwashers

2005-05-03

2005-05-03

Carrillo, Sharidan (Department: 1746)

Cleaning and liquid contact with solids

Processes

Combined

C134S042000, C134S0570DL, C134S05600D, C134S0580DL, C134S113000, C134S186000, C068S208000

Reexamination Certificate

active

06887318

ABSTRACT:
The present invention provides an adaptive fill control for controlling the amount of liquid added in one or more liquid fill periods in a dishwasher cycle. The amount of liquid added in a liquid fill cycle is adjusted by activating the dishwasher drain pump while continuing to operate the dishwasher circulation pump. The accumulated time from the start of the drain pump operation until the circulation pump experiences a liquid starvation episode is compared to a predetermined optimum time period for the circulation pump to experience liquid starvation. The sign and difference between to accumulated time period and optimum time period is used to adjust the amount liquid added in the next liquid fill period. A number of sensors for detecting a circulation pump liquid starvation episode are disclosed.

REFERENCES:
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patent: 5577399 (1996-11-01), Whipple, III et al.
patent: 5722263 (1998-03-01), Tassotti
patent: 6454872 (2002-09-01), Miller et al.

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