Reciprocating compressor and refrigerating apparatus having the same

Abstract

Disclosed are a reciprocating compressor and a refrigerating apparatus having the same, a ball bearing (300) can be easily stably installed between thrust surfaces (213, 227) of a cylinder block (210) and a crank shaft (220) so as to enhance efficiency of the compressor. Also, a ball bearing (300) can be installed by being inserted into thrust surfaces (213, 227) so to shorten a moment arm that much, thereby decreasing a frictional loss at a journal bearing surface (215), resulting in an energy efficiency of the reciprocating compressor and the refrigerating apparatus having the same. In addition, as an oil hole (226c) of the crank shaft (220) is veiled by the journal bearing surface (215) of the cylinder block (210), even if a ball bearing (300) is employed, oil leaked between the thrust surfaces (213, 227) can be reduced, thereby further enhancing the efficiency of the compressor and the refrigerating apparatus having the same.

Description

TECHNICAL FIELDThe present invention relates to a reciprocating compressor and a refrigerating apparatus having the same, and more particularly, a reciprocating compressor having a ball bearing installed between thrust surfaces of a cylinder block and a crank shaft, and a refrigerating apparatus having the same.BACKGROUND ARTIn general, a hermetic compressor is a compressor provided with a motor unit disposed in a hermetic container for generating a driving force, and a compression unit operated by receiving the driving force from the motor unit. The hermetic compressors may be categorized into a reciprocating type, a rotary type, a vane type and a scroll type according to the compression mechanism with respect to a refrigerant as a compressible fluid.The reciprocating compressor is configured such that a crank shaft is coupled to a rotor of a motor unit, a connecting rod is coupled to the crankshaft of the motor unit and a piston is coupled to the connecting rod, so that the piston...

AI Technical Summary

Benefits of technology

In the reciprocating compressor in accordance with the present invention and the refrigerating apparatus having the same, a ball bearing can be easily stably installed between thrust surfaces of the cylinder block and the crank shaft so as to enhance efficiency of the compressor. Also, a ball bearing can be installed by being inserted into thrust surfaces so as to shorten a moment arm that much, thereby decreasing a frictional loss at a journal bearing surface, resulting in an energy efficiency of the reciprocating compressor and the refrigerating apparatus having the same. In addition, as the oil introduction hole for guiding oil from the inside of the crank shaft to the outside thereof is veiled by the journal bearing surface of the cylinder block, oil leaked between facing surfaces in the shaft direction can be reduced, which allows an effective lubrication between a cam portion and the connecting rod and simultaneously effective cooling of a motor unit, resulting in further enhancement of the efficiency of the compressor and the refrigerating apparatus having the same.

Problems solved by technology

However, the related art reciprocating compressor has limitation on the reduction of frictional loss due to the surface-contact between the thrust surfaces.

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