Hitachi, Ltd.

Hiroyuki Toshimitsu

Hiroshi Ohsugi

Isao Hiyama

Tamotsu Shikamori

Soichi Fukuzawa

Tamotu Shikamori

Toshiyasu Kamano

Masayoshi Hirayama

A full automatic washing machine having a washing/drying cell rotatably mounted in an outer cell, a rotary blade unit provided on the bottom of the washing/drying cell and provided with a cylindrical member mounted thereon, and a washing machine motor adapted to rotate the blade unit in forward and backward directions during washing and rinsing and, to rotate the washing/drying cell at a high speed in one direction during drying. The ratio of the outside diameter of the rotary blade unit to the inside diameter of the washing/drying cell is selected to range between 0.6 and 0.8. The speed of rotation of the rotary blade unit is selected to fall within the range of between 100 and 250 rpm. The time length of rotation of the washing machine motor in each of forward and backward directions is selected to be less than 1 second.

Full automatic washing machine

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

A fully automatic washing machine having a washing/drying cell rotatably mounted in an outer cell, a rotary blade unit provided on the bottom of the washing/drying cell and provided with a cylindrical member mounted thereon, and a washing machine motor adapted to rotate the blade unit in forward and backward directions during washing and rinsing and, to rotate the washing/drying cell at a high speed in one direction during drying. The ratio of the outside diameter of the rotary blade unit to the inside diameter of the washing/drying cell is selected to range between 0.6 and 0.8. The speed of rotation of the rotary blade unit is selected to fall within the range of between 100 and 250 rpm. The time length of rotation of the washing machine motor in each of forward and backward directions is selected to be less than 1 second.

Fully automatic washing machine

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Hitachi, Japan

Hiroyuki Toshimitsu