| 摘要 |
PURPOSE:To reduce separation, turbulence, leakage of gas flow by providing blades on a conical base, by forming the inlet side and the blowdown side of the blade into specified forms, and by providing a rectifying blade on the blade. CONSTITUTION:In the center of a casing 21, an air inlet hole 22 is arranged, and the reverse side thereof is so mounted as not to cause air leakage in a frame 23 of a motor 30. The casing 21 includes an impeller 24 and an air guide 26. The impeller 24 is formed by providing blades 25 on a conical base 32, curving the inlet side of the blade 25 to a rotational direction of the motor, so as to allow for easy flow-in of air flow, and by providing the blowdown side at angle of delay to the rotational direction. On the blade 25, a rectifying blade 33 is provided so as to form almost a right angle from a starting end of the inlet side to the blade 25. |
