Title:
CENTRIFUGAL FAN AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/019294
Kind Code:
A1
Abstract:
An electronic device (200) and a centrifugal fan (100) thereof, the centrifugal fan (100) comprising a volute (10) and an impeller (20) mounted on the volute (10). The impeller (20) comprises an impeller shaft (21) and a plurality of blades (22). The impeller shaft (21) drives the plurality of blades (22) to rotate so that any point on the blades (22) carries out circular motion around the impeller shaft (21). The plurality of blades (22) are arranged at an interval from each other on an outer peripheral wall (211) of the impeller shaft (21), and the blades (22) extend from the outer peripheral wall (211) in a direction away from the impeller shaft (21) . An obtuse included angle (α) is formed between a first tangent (L1) of any point on a blade (22) in the extension direction towards the blade (22) and a second tangent (L2) of said point towards the rotation direction of the blade on the circumference, and the included angle (α) formed at each point on the blade (22) gradually decreases in a direction away from the impeller shaft (21). The blade (22) comprises a connecting end (221) and a free end (222) which are away from each other; the blade (22) comprises a windward side (223), and the windward side (223) has an included angle (α1) of 164.5°±5° at the intersection between the connecting end (221) and the peripheral wall (211) and has an included angle (α2) of 102.7°±5° at the end of the free end (222). The described centrifugal fan (100) generates a large amount of air and has high heat dissipation efficiency.
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Inventors:
LI QIANG (CN)
LUO KUNYU (CN)
YU QIANG (CN)
CUI JIE (CN)
LUO KUNYU (CN)
YU QIANG (CN)
CUI JIE (CN)
Application Number:
PCT/CN2018/097419
Publication Date:
January 30, 2020
Filing Date:
July 27, 2018
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
F04D29/30; F04D17/08; F04D25/08
Domestic Patent References:
| WO2017222493A1 | 2017-12-28 |
Foreign References:
| CN103256249A | 2013-08-21 | |||
| JP2000145693A | 2000-05-26 | |||
| CN103629154A | 2014-03-12 | |||
| CN102667173A | 2012-09-12 |
Attorney, Agent or Firm:
BEIJING LISENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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