Title:
PROPELLER FAN
Document Type and Number:
WIPO Patent Application WO/2019/111973
Kind Code:
A1
Abstract:
A propeller fan (5) is equipped with a hub (11) and a plurality of blades (12). The blades (12) have multiple blade elements (12-11, 12-12, 12-13) which diverge partway between the outer-circumferential section (12b) and the inner-circumferential section (12a). The plurality of blade elements (12-11, 12-12, 12-13) are configured so as to: form a hole (12-21) which functions as a channel for airflow between each of the adjacent blade elements; include a rotation direction upstream-side first blade element (12-11) which diverges at the divergence point (12p), and a second blade element (12-12) which is adjacent to the first blade element (12-11) on the downstream side thereof in the direction of rotation; and have an extending section (12-11B), which is one section of the first blade element (12-11) on the rear edge section (12-11-1) of the first blade element (12-11) extending from the divergence point (12p) to the lateral surface (11a) of the hub (11). At least part of the front edge section (12-12-2) of the second blade element (12-12) overlaps the trajectory of rotation of the extending section (12-11B) which rotates around a center axis (O).
Inventors:
SAWADA HIROTAKA (JP)
FUNADA KAZUYA (JP)
FUNADA KAZUYA (JP)
Application Number:
PCT/JP2018/044795
Publication Date:
June 13, 2019
Filing Date:
December 05, 2018
Export Citation:
Assignee:
FUJITSU GENERAL LTD (JP)
International Classes:
F04D29/30; F04D29/66
Domestic Patent References:
| WO2015072256A1 | 2015-05-21 | |||
| WO2011001890A1 | 2011-01-06 |
Foreign References:
| CN104047893A | 2014-09-17 | |||
| CN206377068U | 2017-08-04 | |||
| JP2010101223A | 2010-05-06 | |||
| JP2003503643A | 2003-01-28 | |||
| JP2004116511A | 2004-04-15 |
Other References:
See also references of EP 3722615A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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