Method of manufacturing an aluminum heat exchanger
US5201119A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4938
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A heat exchanger made of aluminum includes 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.