Propeller fan, blower, and air conditioner
US12270411B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2021 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Nov 5, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A propeller fan according to the present disclosure includes a rotation shaft and a blade rotating around the rotation shaft. At the same position in an axial direction of the rotation shaft, a first locus connecting a leading edge of the blade and an outer peripheral end of the blade is tilted with respect to a second locus connecting a center of the rotation shaft and the leading edge so that the outer peripheral end side is inclined toward a trailing side. Alternatively, a third locus connecting a root of the blade and the outer peripheral end of the blade is tilted with respect to a fourth locus connecting a center of the rotation shaft and the root so that the outer peripheral end side is inclined toward the trailing side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.