| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fan for reducing energy consumption. <P>SOLUTION: A fan blade 30 is configured to be attached to a rotary fan hub 12 including: an upper surface 32 with a region that has a generally elliptical curvature, which is based on a first ellipse; a lower surface 34 with a region that has a generally elliptical curvature, which is based on a second ellipse; a leading edge 36 that is edge termination of each of the upper and lower surfaces 32, 34; and a trailing edge 38 that is edge termination of each of the upper and lower surfaces 32, 34. <P>COPYRIGHT: (C)2012,JPO&INPIT |
