Patent ID: 7891956
Filing Date: 2011-02-22
Classification: F04C

Abstract:
1. A rotary compressor comprising: a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion so as to contact an inner circumference of the cylinder, performing a rolling motion along the inner circumference and forming a fluid chamber to suck and compress fluid along with the inner circumference; a vane installed elastically in the cylinder to contact the roller continuously; upper and lower bearings installed respectively in upper and lower portions of the cylinder, for supporting the driving shaft rotatably and sealing the inner volume hermetically; discharge ports communicating with the fluid chamber, the discharge ports comprising a first discharge port and a second discharge port positioned to face each other with respect to the vane; suction ports communicating with the fluid chamber, the suction ports comprising a first suction port positioned across the vane from the second discharge port, a second suction port positioned across the vane from the first discharge port and a third suction port positioned between the second suction port and the vane; a valve assembly for selectively opening any one of the suction ports according to a rotation direction of the driving shaft; the valve assembly comprising: the first valve comprising: wherein the roller compresses the fluid from the first suction port to the second discharge port when the driving shaft rotates in a first direction and the roller compresses the fluid from the second suction port to the first discharge port when the driving shaft rotates in a second direction opposite the first direction, and a separating angle of the first suction port from the vane is different than a separating angle of the second suction port from the vane.