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A lubricating mechanism for a piston type compressor in a refrigeration system. A cam plate is mounted on a drive shaft for integral rotation therewith in a crank chamber, which is defined in a casing. Pistons are coupled to the cam plate and reciprocate in cylinder bores extending parallel to the d

A lubricating mechanism for a piston type compressor in a refrigeration system. A cam plate is mounted on a drive shaft for integral rotation therewith in a crank chamber, which is defined in a casing. Pistons are coupled to the cam plate and reciprocate in cylinder bores extending parallel to the drive shaft. Each piston compresses refrigerant gas containing lubricating oil mist and discharges the compressed refrigerant gas from the compressor during rotation of the cam plate. The refrigerant gas is supplied into the crank chamber and is circulated in the casing. The lubricating oil is supplied to various moving parts from a location near the drive shaft. An oil pan is provided outside and to the side of the casing for collecting lubricating oil. A recovering passage connects the oil pan with the crank chamber to convey the lubricating oil from the crank chamber to the oil pan for collection. A guide passage guides the lubricating oil collected in the oil pan to the location near the drive shaft using gravitational force. By mounting the oil pan on the side of the casing, the oil pan collects relatively less liquefied refrigerant and more oil, and thus improves lubrication of the compressor.

대표청구항 ▼

[ What is claimed is:] [1.] A compressor for a refrigeration system that circulates a refrigerant mixed with oil, the compressor comprising:a casing;a crank chamber within the casing, the crank chamber having a wall, wherein the crank chamber is supplied with the mixture of refrigerant and oil, the

[ What is claimed is:] [1.] A compressor for a refrigeration system that circulates a refrigerant mixed with oil, the compressor comprising:a casing;a crank chamber within the casing, the crank chamber having a wall, wherein the crank chamber is supplied with the mixture of refrigerant and oil, the crank chamber having a bottom at which liquefied refrigerant and oil may settle due to gravity under certain conditions;a drive shaft mounted in a rotatable manner to the casing for driving the compressor;a cam plate connected to and driven by the drive shaft and located within the crank chamber, wherein rotation of the cam plate throws oil against the wall and causes oil to flow along the wall of the crank chamber in the general direction of rotation of the cam plate during operation of the compressor;a cylinder bore formed within the casing;a piston located within the bore, wherein the piston is coupled to the cam plate such that the cam plate causes the piston to reciprocate within the bore, which serves to compress the refrigerant and to discharge the refrigerant and oil mixture from the compressor;an oil pan externally connected to and communicating with the crank chamber for collecting oil from the crank chamber, wherein the oil pan is located at a position elevated from the bottom of the crank chamber;an oil recovering passage for joining the oil pan with the crank chamber such that some of the oil flowing along the wall of the crank chamber enters the recovering passage and thus enters the oil pan;an oil guide passage for guiding oil from the oil pan toward a location near the drive shaft by the force of gravity on the oil.