Cyclone separation device

A cyclone separation device, comprising:

• a cyclone chamber to separate dirt from air;
• a dirt collecting chamber, arranged adjacent to the cyclone chamber, to collect dirt particles separated from the air;
• and
• a dirt duct between the cyclone chamber and the dirt collecting chamber to allow the dirt particles to exit the cyclone chamber into the dirt collecting chamber, wherein the dirt duct includes a pair of opposite side walls and a bottom wall adjoining the pair of opposite side walls, and wherein the dirt duct has an edge protruding into a direction at an angle to the dirt duct at an exit ridge of the cyclone chamber that is first encountered by the air rotating in the cyclone chamber,
• wherein the dirt duct is integral to the cyclone chamber and extends into the dirt collecting chamber, and wherein the bottom wall connects to the exit ridge of the cyclone chamber.