Cryo-refrigeration system
US4951474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Apr 13, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B9/006
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A mechanical refrigeration process in which two or more systems are connected in series to provide successively lower temperature levels. Each system utilizes mixtures of refrigerants and/or inert gases having different boiling points. The mixture is compressed to a suitable pressure and compression heat is rejected to the environment. The mixture is cooled by heat exchange with mixture returning to the compressor. The liquid and gas phases are separated and the separated gas mixture is further cooled to form liquid, by heat exchange with mixture returning to the compressor. The liquid is expanded to a given lower pressure to achieve the desired low temperature. The expanded fluid absorbs heat to provide refrigeration. The liquid expanded to the lower pressure is mixed with the used fluid which absorbed heat to provide refrigeration. The capacity of the system is controlled by throttling the compressor suction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.