Scroll compressor with closed compression spaces having valves to reduce starting torque
US4714415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1986 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Aug 5, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2250/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A scroll compressor comprises an orbiting scroll and a fixed scroll, each of which includes a spiral wrap. These orbiting and fixed scrolls define between their wraps a plurality of close spaces at symmetrical positions. These closed spaces are moved toward the center of the scrolls by means of orbital motion of the orbiting scroll relative to the fixed scroll for reducing their capacities to compress fluid confined therein. Upon starting the compressor, some of the spaces which are in mid course of compressing and the other closed spaces which locate at the downstream side just before the communication with a discharge port, are communicated with each other through valves which open when pressure in the closed spaces at the upstream side is higher than that in the closed spaces at the downstream side, whereby a loading torque upon starting is decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.