Title:
AXIAL FLOW FAN, BLOWING DEVICE, AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/111582
Kind Code:
A1
Abstract:
An axial flow fan is provided with: a hub that is rotationally driven and forms a rotational shaft; and a blade formed around the hub and having a front edge part and a rear edge part. The blade has an edge warped part at an end on an outer peripheral side of the blade in a vertical cross section along an axial direction and a radial direction of the rotational shaft. The edge warped part is formed so that a normal line of a pressure surface is directed outward in the radial direction, and formed in at least a region between the front edge part and a central part that is an intermediate position between the front edge part and the rear edge part in a circumferential direction. The edge warped part is formed so that a length along the pressure surface in the vertical cross section on a front edge part side becomes larger than a length along the pressure surface in the vertical cross section on a rear edge part side.
Inventors:
TADOKORO TAKAHIDE (JP)
MORIKAWA SHOTA (JP)
HOSOMI SHOTA (JP)
YAMAMOTO KATSUYUKI (JP)
MORIKAWA SHOTA (JP)
HOSOMI SHOTA (JP)
YAMAMOTO KATSUYUKI (JP)
Application Number:
PCT/JP2019/047624
Publication Date:
June 10, 2021
Filing Date:
December 05, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04D29/38
Foreign References:
| JP2003148395A | 2003-05-21 | |||
| JP2012233420A | 2012-11-29 | |||
| JPH07301198A | 1995-11-14 | |||
| JP2013213420A | 2013-10-17 | |||
| JP2018150933A | 2018-09-27 | |||
| JPS5887999U | 1983-06-15 | |||
| CN103486081A | 2014-01-01 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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