Patent ID: 9419497
Filing Date: 2016-08-16
CPC Classification: H02K

Claim Text:
1. A double-rotor type motor comprising: a stator; a double-rotor including an inner rotor and an outer rotor; a rotor support having an annular groove formed open towards a lower side thereof, the annular groove accommodating the stator and having an inner surface, an outer surface facing the inner surface and an open lower portion, wherein the inner rotor is mounted on the inner surface and the outer rotor is mounted on the outer surface; a plurality of air passages formed above the annular groove, each of the air passages penetrating the rotor support while forming a support rib in a radial direction between neighboring air passages; an outer blade formed on an upper surface of the support rib, the outer blade protruding upwards by a predetermined height; and an inner blade formed on an inner surface opposite to the upper surface of the support rib, the inner blade protruding downwards by a predetermined height, wherein the plurality of the air passages, the outer blade and the inner blade form a heat dissipation unit forcibly ventilating outer air through the air passages into the annular groove during rotation of the double-rotor, to thereby dissipate heat generated from the stator.