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1. (WO2013154100) PROPELLER FAN, FLUID SENDING DEVICE, ELECTRIC FAN, AND MOLD FOR MOLDING

Pub. No.:    WO/2013/154100    International Application No.:    PCT/JP2013/060708
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Wed Apr 10 01:59:59 CEST 2013
IPC: F04D 29/66
F04D 25/08
F04D 29/38
Applicants: SHARP KABUSHIKI KAISHA
シャープ株式会社
Inventors: KUMON, Yui
公文 ゆい
OHTSUKA, Masaki
大塚 雅生
Title: PROPELLER FAN, FLUID SENDING DEVICE, ELECTRIC FAN, AND MOLD FOR MOLDING
Abstract:
This propeller fan (1010A) comprises: a boss hub part (1011); and a blade (1012A) including a front edge part (1013), a rear edge part (1014), and an outer edge part (1015). The outer edge part (1015) has: a frontward outer edge part (1017b) located on the side of the front edge part (1013); a rearward outer edge part (1017c) located on the side of the rear edge part (1014); and a connecting part (1017a) that connects the frontward outer edge part (1017b) and the rearward outer edge part (1017c). In a planar view of the blade (1012A) along the central axis (1020), the maximum radius (R1max) of the outer edge part (1015) in a section corresponding to the frontward outer edge part (1017b) and the maximum radius (R2max) of the outer edge part (1015) in a section corresponding to the rearward outer edge part (1017c) satisfy the condition R1max>R2max. With this construction, a propeller fan is provided in which: fluctuations in the pressure of the generated wind are small; it is possible to send out a comfortable wind; and noise is reduced.