Hermetic compressor

Abstract

A hermetic compressor including a drive unit, a piston, a rotating shaft including an eccentric shaft portion and a weight balance portion located below the eccentric shaft portion, and an oil flow path having an upper oil hole formed in the rotating shaft and adapted to allow oil to be suctioned upward and dispersed to the upper side of the eccentric shaft portion and an auxiliary oil hole to allow a part of the oil being suctioned upward along the upper oil hole to be supplied into a gap between the eccentric shaft portion and the connecting rod. The eccentric shaft portion is installed with a plug member to close an upper end of the upper oil hole. The plug member is configured to selectively couple a weight balance member, which is separately fabricated from the rotating shaft, to an upper end of the eccentric shaft portion.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 2006-0129124, filed on Dec. 18, 2006 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present disclosure relates to a hermetic compressor, and, more particularly, to a hermetic compressor which can achieve oil lubrication between an eccentric shaft portion of a rotating shaft and a connecting rod, and employ a weight balance member that is separately fabricated from the rotating shaft so as to be coupled to the rotating shaft as occasion demands, in addition to a weight balance portion integrally formed at the rotating shaft for compensating for rotation unbalance caused by the eccentric shaft portion.[0004]2. Description of the Related Art[0005]In general, a hermetic compressor is employed in a refrigeration cycle of a refrigerator or air conditioner...

AI Technical Summary

Benefits of technology

[0021]Therefore, it is an aspect of the disclosure to provide a hermetic compressor which can achieve not only efficient oil lubrication between a connecting rod and an eccentric shaft portion of a rotating shaft, but also easy installation of an additional weight balance member to the rotating shaft, by providing the rotating shaft with a relatively simple configuration.

Problems solved by technology

However, in the above described conventional hermetic compressor, most of the oil, suctioned upward along the oil flow path, is dispersed to the upper side of the eccentric shaft portion along the oil flow path, and thus only a residual small amount of the oil is supplied via the auxiliary oil hole.

This brings about a result of supplying an excessive amount of oil toward the cylinder and the piston, and causing the introduction of oil into the compressing chamber.

When the oil is introduced into the compressing chamber, degradation in the compression efficiency of a refrigerant is inevitable, and it is difficult to supply a sufficient amount of oil into the gap between the connecting rod and the eccentric shaft portion, resulting in serious wear of the connecting rod.

Further, in the case of the conventional hermetic compressor, the weight of the weight balance portion may be too small to compensate for rotation unbalance of the rotating shaft.

In this case, although it is necessary to couple a weight balance member, which is separately fabricated, to the rotating shaft, the coupling of the weight balance member to the rotating shaft is very difficult due to interference with the connecting rod.

However, in this case, it is necessary to significantly change the shape and structure of the rotating shaft, and consequently to exchange a mold, etc. for the fabrication of the rotating shaft, resulting in enormous manufacturing costs.

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