- Patent Title: Propeller fan, air-sending device, and refrigeration cycle device
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Application No.: US16619692Application Date: 2017-08-09
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Publication No.: US11434924B2Publication Date: 2022-09-06
- Inventor: Takuya Teramoto , Takahide Tadokoro , Katsuyuki Yamamoto , Hiroya Ito , Yuki Ugajin , Shingo Hamada , Takashi Ikeda , Takafumi Abe
- Applicant: Mitsubishi Electric Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Posz Law Group, PLC
- International Application: PCT/JP2017/028959 WO 20170809
- International Announcement: WO2019/030868 WO 20190214
- Main IPC: F04D29/38
- IPC: F04D29/38 ; F04D25/02 ; F04D29/053

Abstract:
A propeller fan includes a shaft portion disposed on a rotation axis, and a blade disposed on an outer peripheral side of the shaft portion and including a leading edge and a trailing edge. The blade includes a negative pressure surface in which a plurality of recesses are formed, and the plurality of recesses include a first recess and a second recess disposed on the trailing edge side than the first recess in a circumferential direction about the rotation axis as a center. The first recess has a depth larger than a depth of the second recess.
Public/Granted literature
- US20200166048A1 PROPELLER FAN, AIR-SENDING DEVICE, AND REFRIGERATION CYCLE DEVICE Public/Granted day:2020-05-28
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