Lanced fin condenser for central air conditioner
US4691768A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1985 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Dec 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/503
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An improved fin configuration is provided for use in central air conditioning unit heat exchangers in which heat transfer takes place between a first fluid, typically a refrigerant, flowing inside a nested plurality of tubes and a second fluid, typically air, flowing between the tubes and through a plurality of heat conducting fins attached to and arrayed between the tubes. Lanced pairs of streamwise adjacent bridge-like formations, one out each side of a generally corrugated fin surface, provide numerous leading edges to generate a plurality of reforming velocity and heat transfer boundary layers which leads to an increase in flow turbulence for enhanced heat transfer between the fins and the second fluid. By strategic location of a pair of such formations between tubes, with the upstream one of the pair at a positive angle of attack to the flow, air flow is directed through the fin to mix with flow on the other side of the fin and hence the heat transfer rate is improved. The provision of a shallow conical annular fin region around each collar attaching a fin to a tube, preferably with a 6.degree. inclination of the conical surface to a plane orthogonal to the collar axis, provid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.