CYCLONE SEPARATION DEVICE

A cyclone separation device comprises a cyclone chamber (C) for separating dirt from incoming air, a dirt collecting chamber (D) arranged adjacent to the cyclone chamber (C) for collecting dirt particles separated from air (A), and a dirt duct (DD) between the cyclone chamber (C) and the dirt collecting chamber (D) for allowing dirt particles to exit the cyclone chamber (C) into the dirt collecting chamber (D). To reduce the generation of noise-generating air vortices, the dirt duct (DD) has an edge (E) protruding into a direction at an angle to the dirt duct (DD) at an exit ridge of the cyclone chamber (C) that is first encountered by the air (A) rotating in the cyclone chamber (C). Preferably, the edge (E) is formed by a tangential extension of a wall of the cyclone chamber (C). Preferably, a width (w) of the edge (E) is at least 5 mm, and more preferably at least 8 mm, and even more preferably 12 mm. A vacuum cleaner advantageously comprises such a cyclone separation device.