Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Patent
1994-10-25
1996-04-16
Coe, Philip R.
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
68 1204, 68 1212, 68 24, D06F 3302
Patent
active
055070540
ABSTRACT:
A method for determining a mass of wet laundry in a washing machine drum being driven by an rpm-controlled universal motor is performed with the aid of controller variables. The drum is operated before and/or during a spin cycle within first, second and third phases in a mass determining segment. The drum is operated in the first phase with a delayed rpm rise up to a final rpm above an application rpm at which the laundry is applied to a wall of the drum, and near but below a resonant rpm of a drive system. The drum is operated in the second phase with a constant command rpm equal to the final rpm of a ramp. The drum is operated in the third phase with an rpm running down to a minimum rpm without being driven, and with the rpm still being high enough to prevent a previously developed ring of laundry from separating or more than slightly separating from the drum wall. A length of time is measured from a time when the drive is shut off until a time when the minimum rpm is reached, as a gauge for the mass of the laundry.
Blauert Peter
Boldt Frank
Pilgram Paul T.
Rehfuess Ulrich
Wobkemeier Martina
Bosch-Siemens Hausgeraete GmbH
Coe Philip R.
Greenberg Laurence A.
Lerner Herbert L.
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