air movement device especially an impeller wherein the rotation element has an extension in the axial direction parallel to an axis of rotation and the edge design looking in cross section has a geometrical shape which reduces a particle adherence during a rotation of the rotation element application_number US 201615353046 A description example embodiments will now be described more fully with reference to the accompanying drawings in fig1 and 2 there is shown a sample configuration of an impeller 1 according to the invention with an edge design of the impeller blades 2 according to the disclosure in a perspective view and in a top view the impeller 1 is fashioned as a single piece with the bottom disk 6 and the top disk 7 which are connected by the impeller blades 2 extending in the axial direction and curving in the circumferential direction the bottom disk 6 and the top disk 7 merge flush with the radial outer edges of the impeller blades 2 and form the diameter d of the impeller 1 the top disk 7 has an inner opening edge 9 which dictates the size of the axial inlet opening 8 of the impeller 1 the impeller blades 2 extend inward in the radial direction beyond the opening edge 9 looking in the axial top view of fig2 the impeller blades 2 each have a blade contour 3 pointing toward the inlet side geometrically forming an edge design according to.