Propeller fan and refrigeration cycle apparatus
US11333166B2 · kind B2 · utility
1Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 2017 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jul 5, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A propeller fan includes a rotary shaft portion that rotates around an axial center and a plurality of blades disposed around an outer circumferential portion of the rotary shaft portion. Each of the plurality of blades has at least one recessed portion that opens at a trailing edge of the blade. The at least one recessed portion has a first side that is close to an inner circumference of the blade. The first side stretches from the trailing edge toward a leading edge of the blade, and is bent toward an outer circumference of the blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.