| 摘要 |
Provided is a turbofan (200). The turbofan (200) comprises a main plate (115) rotating by a fan motor (120) providing power; and a plurality of blades (400) having one ends connected to the main plate (115), the plurality of blades (400) being disposed along a circumferential direction on the main plate (115), wherein each of the plurality of blades (400) comprises: a first curved part (421) curved in one direction with respect to an extension part (500); and a second curved part (422) curved in the other direction with respect to the extension part (500), wherein a plurality of projections (423) protruding in one direction from the one end of the blade (400) and a plurality of grooves (424) protruding in the other direction are alternately disposed on the first (421) and second (422) curved parts. |
