Electric vacuum cleaner having an electric blower driven in acco

Details Electric vacuum cleaner having an electric blower driven in acco Electric vacuum cleaner having an electric blower driven in acco

1991-07-17

1993-10-26

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, 15412, A47L 928

Patent

active

052554090

ABSTRACT:
An electric vacuum cleaner comprises a main body having an electric blower and a dust collecting chamber, a triac controlling the electric blower, a floor nozzle coupled to the main body, a pressure sensor sensing the pressure in the vicinity of a suction port of the electric blower, a current sensor sensing the current in a rotary brush driving motor of the floor nozzle, and a microcomputer. The microcomputer performs a fuzzy inference on the outputs of the pressure sensor and the current sensor to determine the duty cycle of the blower control triac on the basis of the result of the inference. By doing this, supply of power to the electric blower in accordance with the condition of a floor surface is realized.

REFERENCES:
patent: 4328522 (1982-05-01), Tryan
patent: 4654924 (1987-04-01), Getz et al.
patent: 4953253 (1990-09-01), Fukuda et al.
patent: 4958406 (1990-09-01), Toyoshima et al.
patent: 5023973 (1991-06-01), Tsuchida et al.
patent: 5033151 (1991-07-01), Kraft et al.

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