Cooling fan using Coanda effect to reduce recirculation
US7478993B2 · kind B2 · utility
105Cited by
23References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2006 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Apr 29, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/547
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cooling fan for an engine in a vehicle. Ordinarily, a fan rotates within a shroud, which surrounds the fan. Leakage can occur between the tips of the fan blades and the shroud, wherein fan exhaust moves forward, and then passes through the fan again. The invention reduces leakage by placing a surface downstream of the fan. The surface employs the Coanda Effect, to urge fan exhaust to continue in the downstream direction, and not move forward as leakage air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.