| 摘要 |
PROBLEM TO BE SOLVED: To supply the bearing of a compressor with lubricant of appropriate viscosity by providing means for heating the wall face using high temperature refrigerant gas delivered from the compressor on the wall face of an enclosed container in the vicinity of an oil sump thereby preventing the viscosity of lubricant from lowering. SOLUTION: A pipe 33a passing high temperature refrigerant gas of sufficient length for ensuring sufficient heat transmission is wound spirally around the enclosed vessel 1 of a compressor tightly to the outer wall face 51 thereof as means for heating the wall face in the vicinity of an oil sump 31 above a baffle plate 32. Since the outer wall face 51 of the enclosed vessel is heated by high temperature refrigerant gas delivered from the compressor, the refrigerant gas is not condensed on the inner wall face 35 of the enclosed vessel and an oil of appropriate viscosity is obtained while being separated from the refrigerant. Since an electric heater, or the like, for preheating the enclosed vessel of compressor is not required, power consumption can be reduced while reducing the cost through reduction of the number of part items.
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