Title:
CENTRIFUGAL FAN AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/109287
Kind Code:
A1
Abstract:
A centrifugal fan (100) and an electrical device (200). The centrifugal fan (100) comprises a volute (110) and a volute tongue (120), wherein the volute tongue (120) and the volute (110) enclose a wind wheel cavity (130) and an air output cavity (140), the wind wheel cavity (130) being configured to allow for installation of a wind wheel (160), and the air output cavity (140) being in communication with the wind wheel cavity (130) and having an air outlet (150); and the volute tongue (120) comprises a wind wheel side wall surface (121) facing the wind wheel (160) and an air output side wall surface (122) facing the air output cavity (140), the air output side wall surface (122) comprising an air output side arc surface (123) connected to the wind wheel side wall surface (121), a step surface (124) extending from the air output side arc surface (123) toward the side that is away from the air output cavity (140), and a flow guide surface (125) extending from the step surface (124) toward an edge of the air outlet (150). The fan has reduced noise.
Inventors:
WU JINXIN (CN)
Application Number:
PCT/CN2022/125202
Publication Date:
June 22, 2023
Filing Date:
October 13, 2022
Export Citation:
Assignee:
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENTER CO LTD (CN)
MIDEA GROUP CO LTD (CN)
MIDEA GROUP SHANGHAI CO LTD (CN)
MIDEA GROUP CO LTD (CN)
MIDEA GROUP SHANGHAI CO LTD (CN)
International Classes:
F04D29/44; F04D29/42; F04D29/66
Foreign References:
| EP3193022A1 | 2017-07-19 | |||
| US20140178186A1 | 2014-06-26 | |||
| CN109083852A | 2018-12-25 | |||
| CN109058170A | 2018-12-21 | |||
| EP3193022A1 | 2017-07-19 | |||
| CN214577815U | 2021-11-02 | |||
| CN111997935A | 2020-11-27 | |||
| CN109424586A | 2019-03-05 | |||
| US20120148393A1 | 2012-06-14 | |||
| CN114046270A | 2022-02-15 |
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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