VARIABLE CAPACITY ROTARY COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a rotary compressor which can vary its capacity by constructing the compressor so that compression is carried out selectively in either of two compression chambers provided with different internal volumes by an eccentric device arranged on a rotary shaft. SOLUTION: The rotary compressor comprises: an upper and lower compression chambers partitioned into different internal volumes; a rotary shaft passing through the upper and lower chambers and provided with a tightening hole; upper and lower eccentric cams provided on the rotary shaft; upper and lower eccentric bushes disposed on outer surfaces of the upper and lower eccentric cams; a slot provided between the upper and lower eccentric bushes; a locking pin joined in the tightening hole, protruding from the rotary shaft, and selectively switching the upper and lower eccentric bushes to the maximum eccentric positions through its action with the slot; and a surface treatment section formed around the tightening hole so that deformation or abrasion is not generated when the locking pin collides with a first or second end of the slot. COPYRIGHT: (C)2005,JPO&NCIPI