Apparatus for varying capacity of scroll type compressor
US5059098A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1990 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Jan 25, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C18/0215
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a scroll type of compressor having a stationary scroll, a movable scroll opposed to the stationary scroll and rotatable thereabout but not rotatable about its own axis, so that a closed chamber which decreases in volume during the rotation of the movable scroll is defined by and between the stationary scroll and the movable scroll, and an introduction passage through which a coolant is introduced into the compressor, wherein a capacity varying apparatus comprises a suction restriction mechanism provided in the introduction passage to control the cross sectional area thereof in accordance with the pressure of the coolant, a by-pass passage extending through the stationary scroll to connect the portion of the closed chamber connected to start ends of scroll portions provided on the movable and stationary scrolls, while being reduced in volume, to suction pressure area in the compressor, a by-pass opening and closing mechanism provided in the by-pass passage to open and close the latter in accordance with the pressure of the coolant, and a control valve actuated in accordance with the pressure of the coolant before being restricted, to control the operation of the suction restricti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.