Electric vacuum cleaner with suction power responsive to nozzle

Details Electric vacuum cleaner with suction power responsive to nozzle Electric vacuum cleaner with suction power responsive to nozzle

1992-02-12

1994-01-11

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, A47L 928

Patent

active

052769399

ABSTRACT:
An electric vacuum cleaner has a main body with a blower and a dust-collecting chamber, a triac that controls the blower, a floor nozzle coupled to the main body, a sensor that senses the current in a motor in the floor nozzle that drives its rotary brush, and a microcomputer. At a predetermined interval, the sensor sends a representative value of the current for that interval, which may be the maximum value, to the microcomputer. The microcomputer determines the duty cycle of the triac by performing a fuzzy interference procedure on the values that sent. Thus the supply of current to the blower can be varied automatically according to the conditions of use of the floor nozzle and the kind of floor surface cleaned.

REFERENCES:
patent: 4654924 (1987-04-01), Getz et al.
patent: 4953253 (1990-04-01), Fukuda et al.
patent: 4958406 (1990-09-01), Toyoshima et al.
Patent Abstract of Japan (Masushita Denki Sangyo KK) JP-A-58 099295.

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