Process to clean a lubricated vapor compression refrigeration system by using carbon dioxide
US5375426A · kind A · utility
20Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/18
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A process for removing lubricant, hydrocarbons and mixtures thereof from a vapor compression mechanical refrigeration system by using carbon dioxide as a solvent is disclosed. The process is carried out using supercritical, liquified or gaseous carbon dioxide and removes lubricant to a level below about 5% so as to be compatible with environmentally acceptable refrigerants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.