External high pressure to low pressure valve for scroll compressor
US6418740B1 · kind B1 · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Feb 22, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/1933
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An unloader valve for a scroll compressor to selectively communicate suction and discharge is positioned outwardly of the compressor housing. In this way, the unloader valve is ideally positioned to address several system failures. As an example, loss or charge, reverse running, fan failure, etc. are all addressed in an efficient and quick manner. The unloader valve may be the normal unloader valve controlled by a system control which also selectively controls capacity. The unloader valve control is modified such that it is also operable to open the unloader valve when a system failure is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.