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Title:
PROPELLER FAN
Document Type and Number:
WIPO Patent Application WO/2022/070500
Kind Code:
A1
Abstract:
This propeller fan comprises a plurality of blades (14) that extend outward in the direction of the radius of rotation from the outer circumferential surface of a cylindrical hub (12). A ring (16), provided so as to surround the plurality of blades (14), is connected to each blade end (20) of the plurality of blades (14). Each of the plurality of blades (14) has a first portion (30) which is provided toward the inside in the direction of the radius of rotation and in which the axial height is approximately uniform at a maximum warping position (X), and a second portion (32) which is provided toward the outside in the direction of the radius of rotation and in which the axial height at the maximum warping position (X) increases toward the blade end (20).

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Inventors:
CHEN ZUOZHOU (JP)
TAKADA ANAN (JP)
ISHIBASHI TOMOHIRO (JP)
IWATA TOORU (JP)
MARUYAMA KANAME (JP)
Application Number:
PCT/JP2021/018644
Publication Date:
April 07, 2022
Filing Date:
May 17, 2021
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
F04D29/38; F04D29/66
Foreign References:
JP2018109393A2018-07-12
JP2004270701A2004-09-30
JPH05172098A1993-07-09
JP2018173037A2018-11-08
JP2012052443A2012-03-15
JP2018109393A2018-07-12
Other References:
See also references of EP 4212737A4
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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