Title:
IMPELLER, CENTRIFUGAL FAN, AND RANGE HOOD
Document Type and Number:
WIPO Patent Application WO/2023/109295
Kind Code:
A1
Abstract:
An impeller, a centrifugal fan, and a range hood. The impeller (10) is applied to the centrifugal fan (20), and comprises a front disc (100), a rear disc (200), and a blade group (300). The rear disc (200) is spaced apart from the front disc (100). The blade group (300) comprises a plurality of blades (310) connecting the front disc (100) and the rear disc (200), and an air outlet gap (320) is formed between two adjacent blades (310) at intervals. The blades (310) are each provided with a front edge (311) close to the central axis of the impeller (10) and a tail edge (312) distant from the central axis. The front disc (100) is provided with a shielding surface (110), the shielding surface (110) is located on the outer side of the front edge (311) for shielding the end of the air outlet gap (320) close to the front disc (100), and the minimum distance between the shielding surface (110) and the rear disc (200) is smaller than the protruding height of the front edge (311) of each blade relative to the rear disc (200). The impeller inhibits a backflow vortex at the upper ends of the blades, reduces the noise, and improves the smoothness of airflow flowing through the impeller.
Inventors:
YAO YANG (CN)
NAN JIANG (CN)
CHEN PENG (CN)
HU SITE (CN)
NAN JIANG (CN)
CHEN PENG (CN)
HU SITE (CN)
Application Number:
PCT/CN2022/125760
Publication Date:
June 22, 2023
Filing Date:
October 17, 2022
Export Citation:
Assignee:
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENTER CO LTD (CN)
MIDEA GROUP CO LTD (CN)
MIDEA GROUP CO LTD (CN)
International Classes:
F04D29/28; F04D29/30
Foreign References:
| CN211573861U | 2020-09-25 | |||
| CN109026830A | 2018-12-18 | |||
| CN101990604A | 2011-03-23 | |||
| JP2007182768A | 2007-07-19 | |||
| US20150316073A1 | 2015-11-05 | |||
| CN113217458A | 2021-08-06 | |||
| CN106593950A | 2017-04-26 | |||
| CN209569902U | 2019-11-01 | |||
| CN216618003U | 2022-05-27 | |||
| CN114370427A | 2022-04-19 |
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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