Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

1993-11-04

1995-01-17

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

A47L 928

Patent

active

053815840

ABSTRACT:
A controlling apparatus controls a suction performance of a blower motor which is installed into a cleaner main body. The controlling apparatus increases the suction performance when a suction nozzle is operated and decreases the suction performance when the suction nozzle is stopped. Corresponding to a floor use suction nozzle and a crevice use suction nozzle, at a predetermined air flow amount range, the most suitable operation control being suited to a discriminated suction nozzle can carried out automatically. Plural kinds of the suction nozzles at an actual use scope are set beforehand. When the suction nozzle is exchanged the flow amount range is changed over and selected with a respective suction nozzle. Plural kinds of the suction nozzles are selected and changed over automatically according to the dimension of a change amount of an operation condition. A brushless direct motor is used as the blower motor and has a domain being operated at a chopper control duty of factor 100%.

REFERENCES:
patent: 4953253 (1990-09-01), Fukuda et al.
patent: 4958406 (1990-09-01), Toyoshima et al.
patent: 4977639 (1990-12-01), Takahashi et al.

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