| 摘要 |
High pressure drop and evaporator inefficiency due to the presence of lubricant in a refrigerant are avoided in a refrigeration system including a compressor (10) having an inlet (12) and an outlet (14). A gas cooler/condenser (16) receives compressed, lubricant containing refrigerant from the compressor outlet (14). Also included is an evaporator (48) for evaporating refrigerant and cooling another fluid and returning the refrigerant to the compressor inlet (12). A phase separator (36) is interposed between the gas cooler/condenser (16) and the evaporator (48) for receiving cooled refrigerant from the gas cooler/condenser (16). The phase separator (36) includes a chamber (62) having an inlet (34) connected to the gas cooler/condenser (16), an upper vapor outlet (38) connected to the compressor inlet (12), a liquid refrigerant outlet (40) and a lubricant outlet (78). A lubricant conduit (74) is connected to the lubricant outlet (78) and to the compressor inlet (12) for delivering lubricant separated in the phase separator (36) to the compressor (10) for lubrication purposes and a bypass conduit 42 is connected to the vapor outlet 38 and to the compressor inlet (12) to deliver the vapor stream to the compressor (10).
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