| 摘要 |
PROBLEM TO BE SOLVED: To improve performance by securing capability of small gas volume and high wind pressure in an axial flow fan. SOLUTION: An inside casing 13 is mounted into an outside casing 11 via a plurality of stationary blades 12, a motor 14 is mounted to a base end of the outside casing 11, a first main shaft 18 and a second main shaft 19 that extend into the inside casing 13 are connected to a driving shaft 15 of this motor 14, a fixed moving blade 21 is mounted to the first main shaft 18, and a first variable moving blade 22 and a second variable moving blade 23 are mounted to the second main shaft 19.
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