Compressor
US6206648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1998 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Dec 21, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B39/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A compressor having a crank chamber in which a large amount of lubricating oil is constantly maintained. The compressor includes a pressurizing passage through which refrigerant gas flows from a discharge chamber to the crank chamber. A displacement control valve varies the displacement of the compressor by adjusting the flow in the pressurizing passage thereby changing the pressure in the crank chamber and altering the inclination of a swash plate. The compressor further includes a bleeding passage. An oil separator is arranged in the bleeding passage to separate lubricating oil from the refrigerant gas flowing through the bleeding passage. The oil separator and the crank chamber are connected to each other by a recovery passage, through which the separated lubricating oil is returned to the crank chamber, and a pressurizing passage. A venturi tube is employed to help transfer oil from the oil separator to the crank chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.