Patent ID: 9140265
Filing Date: 2015-09-22
Classification: F04D,H02K

Abstract:
1. A blower comprising: an air pump, wherein the pump comprises an impeller and a casing housing the impeller, the casing comprises a casing inlet through which air is drawn into the casing by the impeller and a casing outlet through which air is expelled by the impeller; a motor arranged to drive the impeller, the motor being disposed at the casing outlet and comprising a stator and a rotor, the stator comprising a stator core and a plurality of coils, wherein the stator core comprises a substantially ring-shaped yoke and a plurality of teeth extending inwardly from the yoke, each coil being wound around the yoke and partially sandwiched between two adjacent teeth; and a motor bracket configured for rotatably supporting an end of the rotor, the motor bracket comprising an end portion and a plurality of arms extending from the end portion to the casing, the arms being arranged and spaced from each other in a circumferential direction of the blower, an opening being formed between every two adjacent arms, the end portion and the casing, wherein each coil comprises an inner part covering an inner surface of the yoke, an outer part covering an outer surface of the yoke and opposite axial ends respectively covering opposite axial end surfaces of the yoke, the outer parts and axial ends of some of the coils being exposed to outside of the motor bracket via the openings, and wherein the casing is cup-shaped and comprises an end plate at which the casing inlet is formed, a tubular side wall and a ring-shaped covering plate at which the casing outlet is formed, the impeller being axially disposed between the end plate and the covering plate, wherein the stator comprises a plurality of connecting bars connected to the outer surface of the yoke, each connecting bar being fixed to a corresponding arm.