VACUUM CLEANER

摘要

PROBLEM TO BE SOLVED: To protect an electric motor from an overload while maximizing a dust picking-up performance of a rotary brush at a normal use by using temperature as a parameter in protection of the electric motor from the overload. SOLUTION: An overload detecting means 17 detects the overload of the electric motor 8, protecting the motor from the overload exerting the dust picking-up performance at the normal use by an output of a current detecting means 14 as an overload detecting means through a current value specified from a winding resistance according to a winding temperature of the motor.