| 摘要 |
Disclosed is a rotary compressor having two compression capacities. The rotary compressor includes: a driving shaft ( 13 ) being rotatable clockwise and counterclockwise, and having an eccentric portion ( 13 a) of a predetermined size; a cylinder ( 21 ) forming a predetermined inner volume; a roller ( 22 ) installed rotatably on an outer circumference of the eccentric portion ( 13 a) so as to contact an inner circumference of the cylinder ( 21 ), performing a rolling motion along the inner circumference and forming a fluid chamber ( 29 ) to suck and compress fluid along with the inner circumference; a vane ( 23 ) installed elastically in the cylinder to contact the roller ( 22 ) continuously; a first bearing ( 24 ) installed in the cylinder ( 21 ), for rotatably supporting the driving shaft ( 13 ); a second bearing ( 300 ) installed in the cylinder ( 21 ), for rotatably supporting the driving shaft ( 13 ) and guiding the fluid into the fluid chamber ( 29 ); discharge ports ( 26 ) communicating with the fluid chamber ( 29 ); and a valve assembly ( 400 ) having openings ( 411, 412 ) separated by a predetermined angle from each other, for allowing the openings ( 411, 412 ) to selectively introduce the fluid into the fluid chamber ( 29 ) through the second bearing ( 300 ) at a predetermined position of the fluid chamber ( 29 ) according to rotation direction of the driving shaft ( 13 ), the valve assembly ( 400 ) having a center ( 410 a) which is eccentrically installed by a predetermined distance from a center of the cylinder ( 29 ).
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