Manually operated refrigerant recovery apparatus
US5181390A · kind A · utility
Inventors
Key dates
| Filing date | Jan 2, 1992 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Jan 2, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2345/003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigerant recovery device for recovering compressible refrigerant from refrigeration system. The system includes in serial fluid communication, a compressor, a condensor, and a means for storing refrigerant. An expansion device is provided in the fluid line interconnecting the condensor and the storage means. A four way valve is provided which has one port interconnected with the refrigeration system being serviced, another port interconnected with the suction side of the compressor and two additional ports in fluid communication with the means for storing refrigerant. The four way valve may be actuated to recover liquid refrigerant from the refrigeration system being serviced by establishing a first path from the system being serviced directly to the means for storing refrigerant. The four way valve establishes a second path from the means for storing refrigerant, through the four way valve to the compressor, the condensor, and, through the expansion device where high pressure gaseous refrigerant is expanded and delivered to the storage cylinder to thereby cool the cylinder. The four way valve may be actuated to another position wherein the refrigeration system being serviced …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.