Control system for compressor protection in a manually operated refrigerant recovery apparatus
US5243828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2345/003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A system for recovering compressible refrigerant from a refrigeration system, of the type having a compressor for lowering the pressure in the refrigeration system to effect the withdrawal of the refrigerant therefrom, and directing the refrigerant to a storage cylinder. The system is operable in a storage cylinder cooling mode of operation wherein the temperature and pressure of the refrigerant withdrawn from the system and stored in the cylinder is lowered. A control system for limiting the pressure ratio across the compressor during operation of the recovery system is provided. The control system includes first means for determining the suction pressure of the compressor and for terminating operation of the recovery system when a desired termination pressure is reached. A second means is provided for determining suction pressure of the compressor, and, for interrupting power to the compressor, and generating a signal perceivable to the user of the recovery system when a predetermined suction pressure greater than the termination pressure is reached. Means are provided for determining the discharge pressure of the compressor, and, for selectively placing the first means for deter…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.