Patent ID: 7594944

Claim:
A multi-cyclone dust separating apparatus, comprising: a main cyclone part comprising one or more cyclones; a sub cyclone part comprising one or more cyclone cones, and the sub cyclone part being arranged in substantially parallel relation with respect to the main cyclone part; and a dust collecting casing provided to surround the main cyclone part and the sub cyclone part, and comprising a dust collecting chamber where dust separated in the main cyclone part and the sub cyclone part is collected, wherein the dust collecting casing has a non-constant radius on the same height from the bottom, wherein the one or more cyclone cones are arranged along an inner circumference of the dust collecting casing to surround a lower part of the main cyclone part, wherein each of the one or more cyclone cones has a diameter that gradually decreases toward an upper end, and wherein air is discharged from the lower part of the main cyclone part, is drawn into a lower part of the sub cyclone part so as to separate fine dust from the air, and is discharged from the lower part of the sub cyclone part.