Title:
PROPELLER FAN, OUTDOOR MACHINE, AND REFRIGERATION CYCLE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/078757
Kind Code:
A1
Abstract:
A propeller fan according to the present invention is provided with: a rotary shaft that becomes a rotational center; and a plurality of blades that are provided to the outer circumferential side of the rotary shaft such that front edges and rear edges of the blades adjacent to each other are connected, wherein first ribs that protrude in the rotational center direction of the rotary shaft so as to surround the rotary shaft and second ribs that protrude in the rotational center direction so as to extend from the rotary shaft toward the first ribs are included on the pressure surfaces of the blades, and, among the ends of the second ribs in the rotational center direction, ends on the opposite side of pressure surfaces protrude further away from the pressure surfaces than, among the ends of the first ribs in the rotational center direction, ends on the opposite side of the pressure surfaces.
Inventors:
TERAMOTO TAKUYA (JP)
IKEDA TAKASHI (JP)
ADACHI YUSUKE (JP)
IKEDA TAKASHI (JP)
ADACHI YUSUKE (JP)
Application Number:
PCT/JP2016/081818
Publication Date:
May 03, 2018
Filing Date:
October 27, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04D29/32
Domestic Patent References:
| WO2016021555A1 | 2016-02-11 | |||
| WO2016045971A1 | 2016-03-31 |
Foreign References:
| JP2003531341A | 2003-10-21 | |||
| JP2009202481A | 2009-09-10 |
Other References:
See also references of EP 3534015A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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