Piston-type compressor

摘要

Provided is a piston type compressor which can enhance cooling of internal parts housed in a crank chamber, while effectively reducing an outflow of oil to the outside of a compressor by effectively performing a centrifugal separating operation due to the rotation of a shaft. The compressor includes: a first suction path which directly introduces a working fluid flowed from a suction port 30 into suction chambers 27a, 27b without via the crank chamber 7; and a second suction path which introduces the working fluid flowed from the suction port 30 into the suction chambers 27a, 27b via the crank chamber 7, and the second suction path includes: an oil separation passage 32 where a working fluid is introduced into the suction chambers 27a, 27b from the crank chamber 7 via holes formed in the shaft; and a bypass passage 33 where the working fluid is introduced into the suction chambers 27a, 27b from the crank chamber 7 through the cylinder blocks 1, 2 without via the shaft 12.

主权项

1. A piston-type compressor comprising:
at least one cylinder block in which cylinder bores which face a crank chamber are formed; pistons which each slides in the inside of the cylinder bore in a reciprocating manner; at least one cylinder head in which a suction chamber and a discharge chamber are formed, the cylinder head being jointed to the cylinder block by interposing a valve plate therebetween; a shaft which penetrates the crank chamber and is rotatably supported on the cylinder block; a swash plate which is housed in the crank chamber and is rotatable due to the rotation of the shaft so as to reciprocate the pistons; and a suction port for sucking a working fluid and a discharge port for discharging the working fluid which are formed in the cylinder block or the cylinder head, wherein the working fluid which is sucked from the suction port is introduced into the suction chamber, and is discharged from the discharge port through the discharge chamber after being compressed by the pistons, being characterized in that at least an axial hole which is formed along the axial direction of the shaft, and a side hole which communicates with the axial hole and is formed along the radial direction of the shaft and opens to the crank chamber are formed in the shaft, a first suction path which directly introduces the working fluid flowed from the suction port into the suction chamber without via the crank chamber is provided, and a second suction path which introduces the working fluid flowed from the suction port into the suction chamber via the crank chamber is provided, and the second suction path includes: an oil separation passage where a working fluid is introduced into the suction chamber from the crank chamber via the side hole and the axial hole formed in the shaft; and a bypass passage where a working fluid is introduced into the suction chamber from the crank chamber through the cylinder block without via the inside of the shaft.