Method for detecting an unbalanced drum in a drum type washing m

Details Method for detecting an unbalanced drum in a drum type washing m Method for detecting an unbalanced drum in a drum type washing m

1998-09-15

2000-04-11

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 1206, D06F 3302

Patent

active

060474289

ABSTRACT:
Disclosed is a method for detecting an unbalanced drum in a drum type washing machine. In the method, deviation of the number of revolutions is calculated, and unbalance of the drum is judged when the deviation is greater than a predetermined unbalance criterion. The deviation is the difference between maximum and minimum numbers of revolutions. The calculation of deviation and the judgement of unbalance are repeatedly performed. Pulse signals of a tachometer need not be accumulated over a long period of time, and an additional unbalance detection program need not be provided and performed, whereby the unbalanced drum can be detected in a short period of time.

REFERENCES:
patent: 5765402 (1998-06-01), Ikeda et al.
patent: 5906020 (1999-05-01), Swint

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