Hitachi, Ltd.

Masayoshi Hirayama

Tamotu Shikamori

Hiroshi Ohsugi

Hiroshi Kinoshita

Isao Hiyama

Hideyuki Tobita

Yoshiaki Takeda

Toshiyasu Kamano

Hiroyuki Toshimitsu

Takeo Honma

Sizuo Thuruta

Toshikazu Ohonishi

Kenichi Kubo

Yoshio Ohwa

Kazufumi Ikeda

Toshiyuki Hori

In a full-automated washer, a cloth amount sensor detects a quantity of an object being washed which is thrown into a washing drum as a value inclusive of information regarding a degree of bulkiness of the object to be washed. A processing circuit included in the full-automated washer is responsive to a detection output signal from the cloth amount sensor to determine a water supply amount, a cleanser feed amount, a stirring time and a rinsing time. The cloth amount sensor is mounted to a stirring motor. Upon an OFF-state of the motor, the detection output signal is generated by measuring a voltage waveform induced by inertial motion which varies in accordance the degree of bulkiness of the object to be washed.

Full-automated washer

When an abnormal washing condition occurs during a washing process, an auto-off power source switch is made automatically to present an off condition after a long shelf time such as one hour. In case of the abnormal washing condition of the washing process, since the switch maintains the long shelf time, an operator can notice such an abnormal condition during this long shelf time and then remaining normal washing process can be carried out continuously by getting rid of the abnormal cause. It is therefore unnecessary to re-set the washing process. After the washing process has been finished, the switch is made automatically to present the off condition at a short shelf time such as five minutes. During this short shelf time, it is unnecessary to start the switch at an on condition so as to re-start for carrying out next washing process.

Full automatic electric washing machine having an auto-off power source

Growing community of inventors

Hitachi, Japan

Masayoshi Hirayama