Variable liquid refrigerant injection port locator for screw compressor equipped with automatic variable volume ratio
US4515540A · kind A · utility
13Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Nov 22, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An automatic variable volume ratio screw compressor has a plurality of ports for the injection of liquid refrigerant into the interlobe volume. These ports communicate with the interlobe volume at different effective distances from the discharge port so that the injection of liquid refrigerant may be done at the latest possible time during compression for effective use of the refrigerant, and without risking exposure to the open discharge port. The selection of the port is done automatically in response to the instantaneous internal volume ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.