| 摘要 |
PURPOSE: To improve handling properties of an application oil, an impregnation oil and an assembly oil and electric insulation properties by using a lubricating oil which has no miscibility with a refrigerant mainly composed of hydrofluorocarbon, whose viscosity is low and whose specific gravity is lighter than that of the refrigerant, and closing an on-off valve provided between an evaporator and a compressor when the operation of the compressor is stopped. CONSTITUTION: In order to improve slipperiness of wires and winding work, a hard alkylbenzene oil is applied to the wires, and sintered parts such as a cylinder 16 and a bearing 17, which form a compression chamber, are impregnated with the hard alkylbenzene oil. Further, even when sliding parts of a compressor main body are assembled, they are lubricated with the benzene oil. Also, a refrigerator which uses an HFC 134a as a refrigerant uses the hard alkylbenzene oil as a refrigeration oil 6 for a compressor 1. The refrigerant compressor 1 in such a construction can keep moisture absorbability at a low degree because the hard alkylbenzene oil is used as an application oil and an impregnation oil or an assembly oil, for each chamber, and makes no difference from use of a conventional CFC 12 refrigerant whatsoever. |
