| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To construct a blower impeller for air conditioning from two blades from fan efficiency improvement point of view and reduce rotation noise generated by the same. <P>SOLUTION: In a mixed flow fan 1 provided with a plurality of blades 2 on a roughly truncated conical shape hub 4, a main blade 2 composed of two blades is provided, outer circumference side chord length of the main blade 2 is longer than hub side chord length, a triangular blade 10 is attached to mate a side of the triangle with an outer circumference side front edge of the main blade 2, radius of the blade is made same, a roughly fan-shaped auxiliary blade 3 composed of two blades as total is provided between the main blades 2, radial direction length L2 of the auxiliary blade 3 is shorter than redial direction length L1 of the main blade 1, and outer circumference side blade height H2 of the auxiliary blade 3 is higher than blade height H1 of the main blade at same circumference part. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
