Scroll-type compressor with variable displacement mechanism
US5336058A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C28/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable displacement, scroll-type compressor comprising a housing having fluid inlet and outlet ports. A fixed scroll member, placed within the housing, comprises a first plate from which a first spiral element extends. An orbiting scroll member comprises a second plate from which a second spiral element extends. A pair of holes are formed through said first plate. A pair of bypass passages place intermediately located sealed-off fluid pockets in communication with a suction chamber. A pair of cylinders are formed within respective bypass passages. A valve member having a first and a second axial end is slidably disposed within each of the cylinders so as to close and open the corresponding bypass passage. A spring is disposed within the cylinder so as to urge the valve member to open the bypass passage. The valve member receives pressure at its first axial end from the intermediately located sealed-off fluid pocket. A three-way electromagnetic valve selectively controls communication between the second axial end of the valve member and either the suction chamber or the discharge chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.