发明公开
- 专利标题: PROPELLER FAN
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申请号: EP19771495.9申请日: 2019-02-15
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公开(公告)号: EP3770440A1公开(公告)日: 2021-01-27
- 发明人: SAWADA, Hirotaka , FUNADA, Kazuya
- 申请人: Fujitsu General Limited
- 申请人地址: JP Kanagawa 213-8502 3-3-17, Suenaga Takatsu-ku Kawasaki-shi
- 代理机构: TBK
- 优先权: JP2018054339 20180322
- 国际公布: WO2019181317 20190926
- 主分类号: F04D29/32
- IPC分类号: F04D29/32 ; F04D25/08
摘要:
A propeller fan includes a hub having a rotation axis, and a plurality of blades provided in a circumference direction of the hub, in which a blade includes an inner peripheral portion that is located on a side of a base within a portion from the base connected to the hub to an outer edge, and an outer peripheral portion that is located on a side of the outer edge, the outer peripheral portion is formed as one blade surface, the inner peripheral portion includes a plurality of blade elements arranged at a predetermined interval, a ratio r/R in which a radius r which is a distance from the central axis to a boundary between the inner peripheral portion and the outer peripheral portion and a radius R which is a distance from the central axis to the outer edge is 0.4 or less, and when a wind speed at the outer peripheral portion is V1 and a wind speed at the inner peripheral portion is V2, a relational formula of V1 ≤ V2 × 2.0 is established.
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