Patent Number: 6,296,446

Title: Axial blower

Abstract: An axial blower includes a cylindrical hub, a driving device for rotating the cylindrical hub through a rotational shaft, a plurality of vanes arranged to an outer peripheral surface of the cylindrical hub in a circumferential direction thereof, and a plurality of stream-line ribs each having a stream-line shape and provided at a leading edge portion of a negative pressure surface-side of each of the vanes in a range from an end portion of the leading edge portion towards a trailing edge portion of the vane. The stream-line ribs are formed integrally such that an outer surface of a cross section of each stream-line rib along a rotational direction of the axial blower forms a circular arc and a radius of a circular arc curve of the outer surface at a vane leading edge side is larger than a radius of a circular arc curve at a vane inner surface side.

Inventors: Ishijima; Mitsuyoshi (Fuji, JP), Koshitani; Tetsuya (Fuji, JP), Shimizu; Satoshi (Fuji, JP)

Assignee: Toshiba Carrier Corporation

International Classification: F04D 29/38 (20060101); F04D 029/38 ()

Expiration Date: 10/02/2018