Cleaning and liquid contact with solids – Processes – Combined
Patent
1997-12-23
1999-05-04
Stinson, Frankie L.
Cleaning and liquid contact with solids
Processes
Combined
134 252, 134108, 1341044, 134109, B08B 302
Patent
active
059000708
ABSTRACT:
A thermal input system is provided for a dishwasher having an interior wash chamber receiving soiled dishes and wash liquid. A heater is disposed in a sump region of the wash chamber along with a wash pump which operates to recirculate wash liquid through out the wash chamber. A soil collection chamber receives a portion of recirculating wash liquid from the wash pump wherein soils entrained in the wash liquid are captured within the soil collection chamber. A pressure sensor senses fluid pressure within the soil collection chamber. Control means are provided for energizing the heater during a thermal hold period in response to the pressure within the soil collector exceeding a predetermined limit pressure. In particular, the control means operates to sequence the dishwasher through a predetermined period of operation but bypasses the thermal hold cycle when the pressure within the soil collector does not exceed the predetermined limit pressure.
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Deming Charles P.
Jarvis Wilbur W.
Patera Ginger E.
Roth Ryan K.
Stady Kathryn A.
Krefman Stephen D.
Rice Robert O.
Stinson Frankie L.
Van Winkle Joel M.
Whirlpool Corporation
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