Cyclone separation device and electric vacuum cleaner using same

摘要

This invention is provided with: an inlet (212) into which dust-containing air from an external air path flows; a swirl chamber (218), formed so as to have a substantially cylindrical shape, for swirling the dust-containing air which has flowed in from the inlet (212) and separating air and dust from each other; an outside-side-wall dust-collecting chamber (235) for collecting dust separated from the dust-containing air via a side wall opening (213) opening in a side wall (211a) of an upper cylindrical part (211) of the swirl chamber (218); and a discharge port (244) for discharging air separated from the dust-containing air in the swirl chamber. A rib (220) for suppressing the wind noise of the airflow passing through the side wall opening (213) is provided to the side wall opening (213).