Patent ID: 8104307
Filing Date: 2012-01-31
Classification: F01C,F04B,F04C

Abstract:
1. An expander-integrated compressor, comprising: a closed casing in which an oil reservoir for holding oil is formed in a bottom portion, a compression mechanism provided inside the closed casing, and for compressing a fluid and discharging the fluid into the closed casing, an expansion mechanism provided below the compression mechanism inside the closed casing, and for expanding the fluid, the expansion mechanism including a cylinder, a piston for forming a fluid chamber between the cylinder and itself, a groove portion formed in the cylinder, a partition member inserted slidably in the groove portion to partition the fluid chamber into a high-pressure side fluid chamber and a low-pressure side fluid chamber, and a rear chamber that is formed in the cylinder on a rear side of the partition member and that communicates with the groove portion, a first intake pipe penetrating through the closed casing and connected to a suction side of the compression mechanism, a first discharge pipe connected to the closed casing, with one end thereof being open into the closed casing, a second intake pipe penetrating through the closed casing and connected to a suction side of the expansion mechanism, a second discharge pipe penetrating through the closed casing and connected to a discharge side of the expansion mechanism, a rotating shaft extending vertically, and including an upper rotating portion for rotating the compression mechanism and a lower rotating portion subjected to a torque by the piston of the expansion mechanism, a suction mechanism provided at the lower end of the rotating shaft, and for drawing the oil from the oil reservoir, and an oil supply passage for supplying the oil drawn by the suction mechanism to the rear chamber of the expansion mechanism.