| 摘要 |
A capacity varying type rotary compressor comprises a cylinder mounted in a casing ( 100 ) having a discharge pressure state, a vane pressure chamber (C) provided at a rear side of a vane ( 440 ) that divides an inner space of the cylinder into a suction chamber and a compression chamber with a rotation shaft ( 230 ) inserted into the cylinder thus to be rotated or a rolling piston ( 340, 430 ) inserted into the rotation shaft ( 230 ), a pressure controlling unit ( 500 ) for supplying a discharge pressure or a suction pressure to the vane pressure chamber (C) and thereby restricting or releasing a motion of the vanel ( 440 ), and a pressure leakage preventing couple unit for coupling the cylinder ( 410 ) and bearings ( 330, 420 ) positioned at both sides of the cylinder ( 410 ) and forming the vane pressure chamber (C) with the cylinder ( 410 ) to each other and thereby preventing a pressure leakage of the vane pressure chamber (C). A capacity to compress and discharge a refrigerant is varied according to a load and an entire construction thereof is simplified, thereby reducing consumption power of the compressor or an air conditioner having the same and simplifying an assembly characteristic. Furthermore, a pressure leakage of the vane pressure chamber (C) to which a discharge pressure and a suction pressure are applied is prevented, thereby enhancing a capacity varying function.
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