Hair dryer with axial blower

Claim 1

A portable, hand-held hair dryer comprising structure defining an air inlet, an electric motor, an axial blower fanwheel mounted on said electric motor, said fanwheel having hub portion that is a body of rotation and a plurality of blades disposed on the outside circumference of said hub portion, the diameter of said hub portion, at least in the axial section where said blades are disposed, increasing constantly in the flow direction in such fashion that its surface is curved convexly in this direction, and said blades being smoothly curved and further having an entrance angle that increases with radial distance from the rotational axis of said hub, said angle being a function of the average axial flow velocity generated and the circumferential velocity of the fanwheel at the radial distance in question, and all cross sections of said blades perpendicular to the rotational axis of said fanwheel having midlines through the entire radial lengths of said blades, which midlines are straight lines and extensions of which intersect the rotational axis of said hub portion.