Aluminum heat exchanger and method of manufacturing same
US5070938A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 16, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Jul 16, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2265/20
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat exchanger made of aluminum comprises a plurality of tubes made of aluminum through which a fluid to be heat exchanged flows, the tubes having a metal surface of aluminum; fins made of aluminum arranged between the tubes for accelerating heat exchange between the fluid to be heat-exchanged and air, the fins having a metal surface of aluminum; a first protecting film of a chemical conversion coating formed on the metal surfaces of the tubes and fins and containing a metal component; and a second protecting film of an antimicrobial agent coating on the first protecting film, at least on the fins among the tubes and fins, the second protecting film having a chemical bond with the metal component of the first protecting film. An example of the antimicrobial agent is 2,2'-dithiobis(pyridine-1-oxide).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.