Daikin Industries, Ltd.

Kouzou Yoshinaga

Hideshi Tanaka

Hironobu Teraoka

Hirohiko Matsushita

Tadashi Ohnishi

Yoshinori Kagawa

Kazuya Haraguchi

Fumito Fujioka

An impeller of a blower is disposed with circular support plates that are made of a resin and rotate about an axis of rotation and a plurality of blades that are made of a resin. The blades are disposed on outer peripheral portions of the circular support plates so as to be parallel to an axis of rotation, and serrated shapes are formed on the blades by cutting out blade tips at plural places. Additionally, a step is formed in a blade face of each of the blades at a position a predetermined distance from the blade tip where the serrated shape is formed.

Impeller of multiblade blower and method of manufacuturing the same

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

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Kusatsu, Japan

Kouzou Yoshinaga