| 摘要 |
Disclosed are a capacity variable type rotary compressor and a driving method thereof. In the compressor, bypass holes (33,34) for connecting a compression chamber (V1) and a suction chamber (V2) of a cylinder (10) divided from each other by a vane (60) are formed at a sub bearing (30), and a sliding valve (81) for opening and closing the bypass holes (33,34) is installed at the sub bearing (30). A pressure difference maintaining unit (200) for enabling the sliding valve (81) to perform a capacity exclusion driving is further provided, thereby greatly lowering a cooling capability at the time of the capacity exclusion driving. Also, by maintaining the capacity exclusion driving for a long time, an air conditioner is variously controlled and unnecessary power waste of the compressor and the air conditioner to which the compressor is applied is decreased. A back pressure of the sliding valve (81) is fast and precisely switched by a pilot valve (91) having a cheap cost and a high reliability, so that the capacity variable type rotary compressor can be widely applied to a compressor or an air conditioner thereby to enhance the efficiency thereof.
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