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 (21) to contact the roller (22) continuously; upper and lower bearings (24,25) installed respectively in upper and lower portions of the cylinder (21), for rotatably supporting the driving shaft (13) and hermetically sealing the inner volume; discharge ports (26) communicating with the fluid chamber; suction ports (27) communicating with the fluid chamber and being spaced apart by a predetermined angle form each other; and a valve assembly (110,120) for selectively opening any one of the suction ports (27) according to the rotation direction of the driving shaft (13), wherein compression spaces that have different sizes form each other are formed in the fluid chamber (29) according to the rotation direction of the driving shaft (13) so that two different compression capacities are formed.