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US 4,553,413 AGranted
Washing machine
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNobuo Genji, Wataru Takahashi, Masatatsu Nakamura, Yoichi Kawai
Life of this patent
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Abstract
The present invention is designed to detect instantaneous variations in the current flowing through a motor (5), instantaneous variations in the rotation of an agitating body (4), or instantaneous variations in the rotation of the motor (5) to thereby detect the washing load size. On the basis of the detection signal, the washing process is controlled to make it possible to properly set the washing bath ratio, detergent concentration, washing time, and number of revolutions of the fabrics being washed.
Claims9
A washing machine comprising:
- a washing load agitating body;
- a washing load size detecting means having an instantaneous load variation value detection menas for detecting instantaneous values of variation in the load on said agitating body, and level judging means for judging the levels of said values and having integrating means for integrating said instantaneous values of the variations in the load over predetermined periods of time and comparator means for comparing the integrated values with a predetermined value for producing a washing load size signal;
- and control means to which said size detecting means is connected for controlling the washing operation of said washing machine in response to said washing load size signals.
Dependencies are inferred from the claim text.