RECIPROCATING COMPRESSOR AND METHOD OF LUBRICATING THE RECIPROCATING COMPRESSOR

摘要

A reciprocating compressor which can provide a smooth lubricating effect onto a sliding surface between a piston and a cylinder bore and prevent a delivered refrigerant from being leaked, and which leads, after lubricating oil mixed in the refrigerant is separated from the refrigerant by an oil separator (23) installed on a delivery side, the separated lubricating oil, for lubrication, to the sliding surface between the cylinder bore (12) and the piston (13) moving reciprocatingly inside the cylinder bore (12) through an oil feeding hole (29) provided in a cylinder block (1), wherein the axial intermediate area on the outer peripheral surface of the piston (13) is formed in a small diameter portion so as to form an oil sump (30), and the oil sump (30) is formed so as not to communicate directly with a drive shaft chamber (7) so that the lubricating oil can be stored at all times.