| 摘要 |
PROBLEM TO BE SOLVED: To reduce a temperature of lubricating oil so as to increase a volume resistivity, and increase an insulation resistance value so as to reduce leakage current by arranging an oil pipe in a compressor, and arranging the oil pipe in a coolant sucking piping of the compressor freely to exchange heat. SOLUTION: Lubricating oil that flows into a compression chamber of a compressor mechanism part 2 is discharged into a shell together with coolant much lubricating oil is separated from the coolant in the shell, and falls down to a reserving part 5. A part thereof flows out from a coolant discharging pipe 5 during refrigerating cycle. Lubricating oil which flows out during refrigerating cycle is circulated together with the coolant during refrigerating cycle, and is returned from a coolant suction piping 7 into the shell. in this time as a-n oil pipe 6 provided on a compressor 1 is arranged so as to be brought into contact with the piping 7 for sucking the coolant supplied to the compressor 1, heat exchange is carried out between lubricating oil in the oil pipe 6 and the coolant which flows coolant suction piping 7. As a result, a temperature of the lubricating oil 4 is reduced. A volume resistivity of the lubricating oil is increased, and an electric resistance value is also increased.
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