Daikin Industries, Ltd.

Tadashi Ohnishi

Masaki Yamamoto

Seiji Sato

Hironobu Teraoka

Masashi Kamada

Manabu Kato

Zhiming Zheng

Hiroki Ishihara

Hideshi Tanaka

Hirohiko Matsushita

Kouzou Yoshinaga

Tatsuo Fujiwara

An impeller is provided for a blower having a blade (), a plurality of notches () provided at predetermined intervals on a side edge of the blade (), and a plurality of smooth portions () each provided between a pair of the notches (). Since a transverse vortex discharged from the side edge of the blade (), and on a large scale, is organized by vertical vortexes formed in the notches () on a small scale so as to be segmented into stable transverse vortexes, it becomes possible to reduce aerodynamic noise.

Impeller for blower and air conditioner having the same

A frame ( ) is provided around the perimeter of the air outlet ( ) of the fan ( ). The frame ( ) includes a plurality of board-shaped ribs ( ) extending radially outward from the vicinity of the center of the frame ( ) in the direction of the radius of the fan ( ). The frame ( ) also includes a plurality of cylindrical ribs ( ) integrated with the plurality of board-shaped ribs ( ), and arranged concentrically around the rotation axis (O-O&prime;) of the fan ( ) at predetermined intervals in the direction of the radius of the fan ( ). The board-shaped ribs ( ) are curved outward in the direction of rotation of the fan ( ) and inclined in the direction of air flowing from the fan ( ).

Fan guard of blower unit and air conditioner

Axial fan

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Sakai, Japan

Tadashi Ohnishi