Title:
AXIAL FAN BLADE, AXIAL FAN BLADE ASSEMBLY, AND AXIAL FAN DUCT ASSEMBLY
Document Type and Number:
WIPO Patent Application WO/2019/136939
Kind Code:
A1
Abstract:
An axial fan blade, an axial fan blade assembly, and an axial fan duct assembly. A flow guide section is formed on the end on the wind-facing edge of an axial fan blade (1) close to the blade tip; multiple flow guide grooves (2) are provided on the flow guide section; the flow guide section meets the condition that (r 2-r 1):r=1/3-1/2, and the depths of the flow guide grooves (2) are gradually decreased towards the rotating center. According to the axial fan blade, the flow guide section can divide an airflow into small airflows, thereby achieving a noise reduction effect, and the depths of the flow guide grooves are gradually decreased, thereby ensuring uniform wind speed.
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Inventors:
JIA XINTAO (CN)
Application Number:
PCT/CN2018/093266
Publication Date:
July 18, 2019
Filing Date:
June 28, 2018
Export Citation:
Assignee:
GD MIDEA ENV APPLIANCES MFG CO LTD (CN)
MIDEA GROUP CO LTD (CN)
MIDEA GROUP CO LTD (CN)
International Classes:
F04D29/38
Foreign References:
| CN102588338A | 2012-07-18 | |||
| CN201679745U | 2010-12-22 | |||
| CN104061187A | 2014-09-24 | |||
| CN102588339A | 2012-07-18 | |||
| DE3234011A1 | 1984-03-15 |
Other References:
See also references of EP 3739218A4
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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