| 摘要 |
PURPOSE: A heat pump system and a control method thereof are provided to reduce energy consumption of a compressor and improve driving performance while minimizing the speed reduction loss, the restarting loss, and the acceleration loss of the compressor. CONSTITUTION: A heat pump system comprises an auxiliary refrigerant supplying unit(150). The auxiliary refrigerant supplying unit comprises a bypass pipe(160), a first control valve(170), a second control valve(180), and a high pressure insulation cylinder(190). When the partial load operation of a compressor is performed, some quantity of the refrigerant discharged from the compressor is filled in the high pressure insulation cylinder and in case the restarting the compressor is performed, and when the compressor restarted, the refrigerant filled in the high pressure insulation cylinder is supplied to the compressor.
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