Patent ID: 7540723

Claim:
A reciprocating compressor comprising: a case having a hermetically sealed space and to which a suction pipe that sucks a fluid and a discharge pipe that discharges a compressed fluid are connected; a reciprocating motor disposed in the case that generates a reciprocation force; a compressing unit compressing a fluid by receiving the reciprocation force generated by the reciprocating motor and comprising a cylinder having a plurality of lubricating oil supply passages extending through a wall of the cylinder and supported by a frame; the frame comprising; a first frame, hermetically fixed to an outer circumferential surface of the cylinder of the compressing unit, containing lubricating oil therein, and connected to a suction pipe that sucks a fluid; a second frame coupled to the first frame and fixed to one side of the reciprocating motor; and a third frame coupled to the second frame, to which the reciprocating motor is fixed, and having a hermetically sealed upper surface; the plurality of lubricating oil supply passages in open communication with a lubricating oil reservoir and which supplies lubricating oil contained in the first frame to a frictionally sliding surface of the compressing unit, wherein the lubricating oil supply passages are on the cylinder at a position lower along an axial direction of the cylinder than a free surface of the lubricating oil in the lubricating oil reservoir.