| 摘要 |
A high pressure chamber in a casing communicates at the bottom thereof with a liquid retainer. A communication pipe is connected at one end thereof to the upper end of the liquid retainer and connected at the other end thereof to an intake pipe. A gas container and first and second solenoid valves are provided in the communication pipe. When the first solenoid valve is closed and the second solenoid valve ( 37 ) is opened, the gas container communicates with the intake pipe to reduce the pressure in the gas container. Thereafter, when the first solenoid valve is opened and the second solenoid valve ( 37 ) is closed, the gas container communicates with the liquid retainer to reduce the pressure in the liquid retainer. Then, the pressure of lubricant oil in the liquid retainer is lowered to gasify a refrigerant dissolving in the lubricant oil. As a result, lubrication malfunction caused due to lowering of the viscosity of the lubricant oil by dissolution of the refrigerant therein is avoided and the reliability of the hermetic compressor is enhanced.
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