Reciprocating compressor refrigeration system using step expansion and auto staging
US4209996A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1978 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Oct 12, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/13
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A compression module in the form of a four cylinder reciprocating piston compressor, having two cylinders for each of two cylinder heads, is interconnected by conduits and manifolds which in turn incorporate solenoid operated control valves and check valves to provide five pressure levels for the compressor cylinders to remove automatically intermediate pressure refrigerant and to return intermediate pressure refrigerant, to achieve single or multiple cylinder compressor staging, and effect unloading of one head by cutting off low pressure suction return to that compressor head. The multiple cylinder, multiple level, automatic staging, reciprocating piston compression module is particularly applicable to a refrigeration system employing common, discharge, suction, liquid drain and liquid feed manifolds, with flow controlled by suitable solenoid operated control valves and check valves and for use in systems including subcooler and accumulator coils and for a heat pump; an outside air coil, a thermal energy storage/direct solar energy heat supply coil, an inside space heating and cooling coil and a high pressure condenser, hot water coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.