US Patent 7381247 Cyclone dust collecting device for vacuum cleaner

A cyclone dust collecting device using a corona discharge is provided. The cyclone dust collecting device includes a cyclone chamber rotating air drawn in from the outside to separate contaminants from the air, a discharge pipe guiding the air separated from the contaminants to the outside of the cyclone chamber and including a discharge electrode part with at least a part made of a conductive material and a power supply unit supplying a power to the discharge electrode part for the discharge electrode part to perform a corona discharge.