A HEAT-PUMP SYSTEM AND A METHOD CONTROLLING THE SAME

摘要

The present invention relates to a heat-pump system. According to an embodiment of the present invention, the heat-pump system comprises: a plurality of compressors to compress coolant; an oil separator provided to an outlet side of the compressors, and configured to separate oil mixed in the coolant compressed by the compressors; an oil separating pipe extended from the oil separator, recovering oil to the compressors; and a compressor oil equalizing pipe extended from one of the compressors, and recovering the oil stored in the compressor to an other compressor of the compressors.