Vacuum cleaner

A vacuum cleaner, comprising:

• an inlet for receiving air to be cleaned, said air including airborne particles;
• an outlet for expelling received air externally of the vacuum cleaner;
• a fan for producing a flow of air through the vacuum cleaner by drawing the air to be cleaned through the inlet into the vacuum cleaner and by exhausting air through the outlet;
• and
• a separator rotatably arranged around a rotation axis for, during operation, producing a column of rotating air for separating at least a portion of the airborne particles from the flow of air, the separator including a plurality of vanes for producing the column of rotating air, each of said vanes having a leading face and a trailing face,
• where the leading faces of the vanes are inclined with respect to the rotation axis for conveying the airborne particles along a path that is at least partially in an axial direction and leads to a zone where a ratio of drag forces tending to guide the airborne particles into the separator relative to centrifugal forces tending to expel said airborne particles away from the separator is smaller than said ratio outside of said zone and where each leading face has a first portion and a second portion, said first portion being inclined in a positive direction and said second portion being oppositely inclined in a negative direction, for guiding airborne particles along said path.