Title:
PROPELLER FAN FOR ELECTRIC FAN, ELECTRIC FAN WITH PROPELLER FAN, AND MOLDING DIE FOR PROPELLER FAN FOR ELECTRIC FAN
Document Type and Number:
Japanese Patent JP2017145832
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a propeller fan capable of feeding out comfortable wind showing a low pressure variation of generated wind and capable of reducing noise.SOLUTION: A propeller fan 10A comprises a rotating shaft part 11 and a blade 12A including a front edge part 13, a rear edge part 14, and an outer edge part 15. The outer edge part 15 has a forward outer edge part 17b positioned at the front edge part 13, a rear outer edge part 14c positioned at the rear edge part 14, and a connecting part 17a for connecting these front outer edge part 17b and rear outer edge part 17c. Under a state in which the blade 12A is seen as a top plan view along a central axis 20, a maximum radius R1of the outer edge part 15 of a portion corresponding to a first bulged-out part 17b and a maximum radius R2of the outer edge part 15 of a portion corresponding to a second bulged-out part 17c satisfy a condition of R1>R2.SELECTED DRAWING: Figure 7
Inventors:
KUMON YUI
OTSUKA MASAO
OTSUKA MASAO
Application Number:
JP2017110360A
Publication Date:
August 24, 2017
Filing Date:
June 02, 2017
Export Citation:
Assignee:
SHARP KK
International Classes:
F04D29/38; F04D25/08; F04D29/66
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Foreign References:
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Attorney, Agent or Firm:
Fukami patent office