REFRIGERATING SYSTEM

摘要

The present invention relates to an oil collecting system of a compressor for a refrigerating system, comprising: a first compressor which compresses a refrigerant; a second compressor which is serially connected to the first compressor and has a smaller compression capacity than the first compressor; a first oil distribution pipe which is connected to the second compressor and guides oil from the second compressor to the first compressor; a first oil distribution valve which is prepared in the first oil distribution pipe to open and close the first oil distribution pipe; and a control part which increases the amount of oil returned to the first compressor by controlling one or more from the operation frequency of the first compressor and the oil distribution valve by the operation of the second compressor. Therefore, the present invention prevents damage to the compressor caused by the imbalance of the oil.