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1. (WO2018198300) PROPELLER FAN

Pub. No.:    WO/2018/198300    International Application No.:    PCT/JP2017/016878
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: F04D 29/38
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: TERAMOTO, Takuya
寺本 拓矢
IKEDA, Takashi
池田 尚史
ADACHI, Yusuke
安達 祐介
Title: PROPELLER FAN
Abstract:
This propeller fan comprises a shaft part provided along a rotational axis, and a blade that is provided to the outer periphery of the shaft part and has a leading edge and a trailing edge. A notch is formed in at least one of the leading edge and the trailing edge, the notch having a pair of side edge parts of which the opening angle is acute and a bottom edge part formed between the pair of side edge parts. At least one protrusion of which the opening angle is obtuse is formed in the bottom edge part.