PURPOSE: To detect the operating period of a floor brush with a simple structure, and estimate the kind of a cleaning floor surface with high precision.
CONSTITUTION: The fluctuation of negative pressure in a dust collecting chamber is detected by a pressure sensor circuit 7, the operating period of a floor suction hole is detected from the output waveform by an input value comparative arithmetic part 93, the characteristic quantity of the output waveform of the pressure sensor circuit 7 is precisely gained synchronously with the operating period by a floor surface estimating arithmetic part 92 to estimate the cleaning floor surface. Since an electric blower control part 94 conducts the electric blower control according to the suction hole operating period or the kind of the cleaning floor surface, the suction force according to the cleaning state of a cleaner can be provided.
KAWAMATA MITSUHISA
HOSOKAWA ATSUSHI
HIDA HIDEYUKI
