Patent ID: 8251677

Claim:
A blower apparatus, comprising: an electric motor that drives a blower wheel, wherein the electric motor is arranged in a motor housing and has a commutator with at least two brushes that form in each case an associated brush bearing face with respect to the commutator; and a cooling air channel, wherein a cooling air flow for cooling the electric motor is diverted into the cooling air channel of the motor housing by a blower air flow produced by the blower wheel, and wherein the cooling air channel has an air distributor that splits the cooling air flow into at least two cooling air subflows, each cooling air subflow supplied directly and is targeted to one of the at least two brush bearing faces, the cooling air subflows being directed towards the brush bearing faces by a pair of guide flanks provided on a closure of the cooling air channel, wherein the guide flanks are angled toward a direction of flow of the cooling air stream deflect a cooling air partial stream at about an angle of 90 degrees into a direction of flow which runs substantially parallel to a rotor axis of the electric motor such that each cooling air subflow is directed from above onto one of the brush contact surfaces.