Patent ID: 8690545
Filing Date: 2014-04-08
Classification: F04B,F25B

Abstract:
1. Reciprocating piston compressor for a refrigerant circuit, comprising a crankcase, a collecting chamber for lubricant being arranged in said crankcase, a cylinder housing, at least one reciprocating piston being movable in an oscillating manner in said cylinder housing, a valve plate closing the cylinder housing, at least one inlet valve and one outlet valve being arranged in said valve plate, and a cylinder head, a suction gas duct running to the inlet valve and a compressed gas duct leading away from the outlet valve, said suction gas duct being provided in said cylinder head, a lubricant suction conduit, said conduit having an inlet opening associated with the collecting chamber, the inlet opening of the lubricant suction conduit being arranged in said collecting chamber at a distance from a bottom of said collecting chamber such that it predetermines a lowest surface level of the lubricant bath achievable as a result of lubricant being drawn off by suction via the lubricant suction conduit, said lowest level representing a sufficient amount of lubricant for said reciprocating piston compressor, said lubricant suction conduit having an outlet opening associated with the suction gas duct, the outlet opening being located in an area of the suction gas duct where a static pressure prevails at least temporarily, said pressure being lower than a static pressure in the collecting chamber for lubricant; and wherein the outlet opening of the lubricant suction conduit is connected to the suction gas duct and not the cylinder housing and conveys lubricant he suction conduit during an operational state.