Scroll type compressor
US5639225A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C28/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a scroll type compressor, when the operation of the compressor is stopped, compression chambers, for compressing a fluid, and a suction chamber are communicated with each other through bypass holes, and a spool valve to open and close the holes, so that the pressure in the compression chambers are lowered and the occurrence of a shock caused by a sharp increase in the load is prevented at the next start. Since the discharge pressure to drive the spool valve is introduced from a position upstream of the discharge valve, pressure is quickly lowered when the compressor stops, so that the spool valve can be quickly opened. Therefore, even when the compressor is frequently started and stopped, the occurrence of a shock can be positively prevented when the compressor starts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.