| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant circulation system using a heat pump cycle capable of reducing the temperature of discharged refrigerant gas to a temperature not causing troubles in an electric motor or lubricating oil without deteriorating the heating capability to a heating fluid even in application of a high-pressure shell-type hermetic compressor to the refrigerant circulation system. SOLUTION: This system comprises the heat pump cycle, a radiator heating the heating fluid by heat exchange with high-temperature refrigerant, the high-pressure shell-type hermetic compressor, an oil basin for storing lubricating oil formed within a sealed container, and a lubricating oil circulating passage extending from the oil basin to the radiator and then returning to a suction side that is an inlet of the hermetic compressor through a restriction mechanism. The lubricating oil in the oil basin is circulated to the lubricating oil circulating circuit by a pressure difference between high pressure and low pressure, and then guided to the radiator, in which the lubricating oil is cooled by heat exchange with the heating fluid together with a refrigerant. The lubricating oil is then reduced in pressure by the restriction mechanism, and supplied to the suction side that is the inlet of the hermetic compressor. COPYRIGHT: (C)2006,JPO&NCIPI |
