VARIABLE DISPLACEMENT ROTARY COMPRESSOR FOR PREVENTING AN ECCENTRIC BUSH FROM ROTATING FASTER THAN A ROTARY SHAFT IN A SPECIFIC AREA BY PRESSURE CHANGE GENERATED IN EACH COMPRESSION CHAMBER IN TURNING THE ROTARY SHAFT

摘要

PURPOSE: A variable displacement rotary compressor is provided to cool properly a peripheral space and to save energy by changing compression capacity by an eccentric unit rotating forward and reversely in upper and lower compression chambers. CONSTITUTION: A variable displacement rotary compressor is composed of upper and lower compression chambers divided into different volumes; a rotary shaft(21) penetrating the upper and lower compression chambers; upper and lower eccentric cams(41,42) disposed at the rotary shaft; upper and lower eccentric bushes(51,52) arranged on the outer peripheral surfaces of the upper and lower eccentric cams; a slot(53) interposed between the upper and lower bushes; and a hanging pin(43) for converting selectively the upper and lower eccentric bushes into a maximum eccentric position by acting with the slot. The slot inclines at the constant angle to position first and second ends of the slot at different heights.