Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1991-10-07
1993-09-14
MacDonald, Allen R.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
395900, G06F 1500, A47L 900
Patent
active
052437329
ABSTRACT:
In a vacuum cleaner, both static pressure H.sub.data and a variation width .DELTA.H in the static pressure appearing when a suction port is operated are detected from a pressure sensor provided at a rear side of a filter within a main body of the vacuum cleaner; a current variation width .DELTA.pbi appearing when the suction port is operated is detected from a current of a nozzel motor for driving a rotary brush stored in a power brush suction port; an air quantity at the suction port is calculated from the current, rotational speed of a fan motor and static pressure; command values are newly obtained by performing a fuzzy calculation with the variation width .DELTA.pbi, static-pressure command value Hcmd; the variation width .DELTA.H and the static-pressure command value Qcmd; the variation width .DELTA.pbi and static-pressure command value Hcmd; and also the variation width .DELTA.H and static-pressure command value Qcmd as the input thereto; the rotational speeds of the fan motor and nozzel motor are controlled from the result of the command values; and further optimum air suction force is automatically obtained, depending upon the suction port under use and cleaning floor plane.
REFERENCES:
patent: 4649515 (1987-03-01), Thompson et al.
patent: 4654924 (1987-04-01), Getz et al.
patent: 4733430 (1988-03-01), Westergren
patent: 4733431 (1988-03-01), Martin
patent: 4864490 (1989-09-01), Nomoto et al.
patent: 4880474 (1989-11-01), Koharagi et al.
patent: 4958406 (1990-09-01), Toyoshima et al.
Abe Takeshi
Ajima Toshiyuki
Endo Tsunehiro
Futami Motoo
Hosokawa Atusi
Hitachi , Ltd.
MacDonald Allen R.
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