Propeller fan, and air blower, air conditioner, and hot-water supply outdoor unit including the same
US9863433B2 · kind B2 · utility
1Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2013 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Aug 26, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The propeller fan includes a boss including a rotation axis, a plurality of blades formed on an outer periphery of the boss, and a bellmouth arranged so as to surround the plurality of blades at a trailing edge side of each of the blades. Each blade has a bending portion that bulges toward an upstream side of the air current in a cross-sectional shape in a radial direction, and a bend of the bending portion of the blade at an inner side of the bellmouth is set to be gentler than a bend of the bending portion of the blade at an outer side of the bellmouth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.