Hitachi, Ltd.

Wakichiro Hishi

Kunio Miyashita

Kazuo Tahara

Haruo Koharagi

Yoshitaro Ishii

Fumio Jyoraku

Syuji Watanabe

Hisanori Toyoshima

Tsunehiro Endo

Koujirou Yamashita

Kohichi Saito

Tunehiro Endo

Kouichi Saito

Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaned surface are discriminated, and a speed command of the fan motor is corrected on the basis of the result of the discrimination, and the comfortable cleaning can be performed by the optimum suction force.

Method and apparatus for operating vacuum cleaner

Motor control apparatus for an electric vacuum cleaner

Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaner surface are discriminated, and a speed command of the fan motor is corrected on the basis of the result of the discrimination, and the comfortable cleaning can be performed by the optimum suction force.

In a vacuum cleaner comprising an electric blower and a speed control unit to operate the electric blower at a variable speed, a plurality of kinds of operation control rules of the electric blower are previously stored in the speed control unit, a load current value of the electric blower is continuously detected during the cleaning and the type of the surface to be cleaned is estimated from the load current value. Thereafter, the operation control rule suitable for the estimated cleaning surface is selected from the operation control rules stored in the speed control unit and the electric blower is driven on the basis of the selected operation control rule.

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Nagareyama, Japan

Wakichiro Hishi