Refrigeration system and method involving high efficiency gas defrost of plural evaporators
US4979371A · kind A · utility
21Cited by
12References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1990 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jan 31, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/22
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A hot gas defrost type refrigeration system in which refrigerant used to defrost is returned to the system's refrigerant circuit after being collected and reduced in pressure, as by expansion valve means, to a pressure below the pressure in the system's return suction header, then heated as by means involving heat exchange with the system's high pressure refrigerant, the refrigerant used to defrost thus being in a superheated gaseous state and returned to the system's return suction header in such state without risk of introduction of liquid refrigerant to the system's compressor(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.