F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/38 (2006.01) G06F 1/20 (2006.01)
Patent
CA 2276504
Disclosed is a micro fan. The micro fan comprises a hub rotatably mounted to a shaft, and a plurality of blades radially formed on a circumferential outer surface of the hub, wherein each blade has an airfoil-shaped cross-section which generates lift force larger than drag force; and wherein, when assuming that one end of the airfoil-shaped cross-section of each blade, which is rounded at a predetermined radius, is a leading edge, the other end of the airfoil-shaped cross-section of each blade is a trailing edge, a straight line which connects the leading edge and the trailing edge with each other is a chord line, a thickness center line between the leading edge and the trailing edge is a mean line, and an inclination angle of the chord line with respect to a parallel line which is drawn from the leading edge is a blade angle, a blade angle at a root of the blade which is adjacent to the hub is about 24°-34°, a blade angle at a tip of the blade which is adjacent to a duct of the micro fan is about 18°-28°, and a span twist angle which is represented by a difference between the blade angles at the root and the tip is 2°-12° of helical twist., 26
Jun Chang Keun
Park Woang Sik
Hill & Schumacher
Samsung Electro-Mechanics Co. Ltd.
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