Patent ID: 8316664
Filing Date: 2012-11-27
Classification: F01C,F04C,F25B

Abstract:
1. A fluid machine comprising: a closed casing in which an oil reservoir is formed in a bottom part; a main compression mechanism, disposed in the closed casing for compressing a working fluid, and to which oil held in the oil reservoir is supplied; a rotary electric motor disposed above the oil reservoir in the closed casing; a main compressor shaft for coupling the main compression mechanism and the rotary electric motor to each other so that the main compression mechanism is driven by the rotary electric motor; a power recovery mechanism, disposed in the oil reservoir, for recovering motive power from the working fluid by performing a suction process for drawing the working fluid and a discharge process for discharging the drawn working fluid; a sub compression mechanism, disposed in the oil reservoir and driven by the power recovery mechanism, for compressing the working fluid and discharging the working fluid to the main compression mechanism side; and a power recovery shaft for coupling the power recovery mechanism and the sub compression mechanism to each other so that the sub compression mechanism is driven by motive power recovered by the power recovery mechanism.