ROTARY COMPRESSOR

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 (13a) 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 (13a) 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 (410a) which is eccentrically installed by a predetermined distance from a center of the cylinder (29).