Variable capacity rotary compressor

Abstract

A variable capacity rotary compressor including upper and lower compression chambers having different capacities, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a same direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, to be eccentric from the rotating shaft in opposite directions, with a slot provided at a predetermined position between the upper and lower eccentric bushes. A locking pin functions to change a position of the upper or lower eccentric bush to a maximum eccentric position. A restraining unit is set along an edge of the slot to prevent the upper or lower eccentric bush from slipping. The restraining unit includes first and second elastic pieces which are respectively provided at positions adjacent to first and second ends of the slot.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Application Patent No. 2003-68054 filed with the Korean Intellectual Property Office on September 30, 2003, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates generally to a rotary compressor, and more particularly, to a variable capacity rotary compressor in which a compression operation is performed in either of two compression chambers having different capacities by an eccentric unit mounted to a rotary shaft . Background technique [0004] Generally, a compressor is installed in a refrigeration system, such as an air conditioner and a refrigerator, which operates using a refrigeration cycle to cool air in a given space. In a refrigeration system, a compressor operates to compress a refrigerant, which circulates through a refrigeration circuit. The cooling capacity of the refrigeration system is determined...

AI Technical Summary

Problems solved by technology

However, it is impossible to change the capacity of the rotary compressor according to the difference between the ambient temperature and the preset reference temperature, so that the conventional rotary compressor cannot effectively deal with the temperature change, thereby resulting in waste of energy

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