VARIABLE DISPLACEMENT ROTARY COMPRESSOR FOR PREVENTING A SLIP BETWEEN AN ECCENTRIC BUSH AND A ROTARY SHAFT IN COMPRESSING REFRIGERANT

摘要

PURPOSE: A variable displacement rotary compressor is provided to restrict a slip between an eccentric bush and a rotary shaft by constraining the eccentric bush by the rotary shaft and to prevent noise and durability-reduction caused by the collision of the bush and the rotary shaft. CONSTITUTION: A variable displacement rotary compressor is composed of a housing having two compression chambers with different volumes; eccentric cams(41,51) disposed on the outside of a rotary shaft(21) in two compression chambers, respectively; two eccentric bushes(42,52) mounted rotatively on the outsides of the eccentric cams; a hanging unit(80) for suspending the eccentric bushes to make the eccentric bushes eccentric oppositely to each other or in a non-eccentric state according to the rotational direction change of the rotary shaft; and a constraining pin(90) contacted with the inner peripheral surface of the eccentric bush by centrifugal force generated in turning the rotary shaft to restrain the eccentric bushes by frictional force.