Patent ID: 7776116

Claim:
A cyclone dust-separating apparatus comprising: at least one cyclone unit having a cyclone body, which rotates air to separate dust or dirt therefrom, the cyclone body having an air inflow part and an air discharging part, the cyclone body being arranged in such a manner that a longitudinal axis thereof is substantially horizontally arranged; and a dust collecting unit to store the dust or dirt separated by the at least one cyclone unit, wherein the cyclone body is formed in a convex cylinder shape, so that a diameter thereof in the vicinity of an entrance of the air discharging part through which the air is discharged is a maximum diameter, and wherein the air inflow part is formed in a helical inlet shape through which the air is gradually approached in the form of a spiral toward one end surface of the cyclone body from an outside of the one end surface of the cyclone body and then flowed into the cyclone body while coming in contact with the inner circumferential surface of the cyclone body.