Centrifugal fan assembly
US7597541B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jan 18, 2006 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Dec 19, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/422
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a centrifugal fan assembly including a housing and a centrifugal fan. The centrifugal fan includes main blades, each including a suction surface, a pressure surface, a leading edge, and a trailing edge. The centrifugal fan also includes secondary blades, each including a suction surface and a pressure surface. Each main blade defines a mean line between the suction surface and the pressure surface, and a nose-tail line intersecting the main blade mean line at the leading edge and the trailing edge. Each secondary blade defines a mean line between the suction surface and the pressure surface. A portion of the secondary blade mean line is substantially parallel to the main blade mean line when superimposed, and a portion of the superimposed secondary blade mean line deviates from the main blade mean line in a direction toward the main blade nose-tail line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.