HEAT PUMP SYSTEM FOR VEHICLE

摘要

The present invention relates to a heat pump system for a vehicle. More specifically, an electronic expansion valve controlling an opening degree of a hole is installed between an indoor heat exchanger and an outdoor heat exchanger in the heat pump system, and the heat pump system variably controls the opening degree of the electronic expansion valve depending on the number of revolutions of a compressor in a heat pump mode. That is, the present invention controls the opening degree of the electronic expansion valve at a target supercooling degree if the indoor heat exchanger by number of revolutions of the compressor in order to increase a heat dissipation amount and efficiency of the indoor heat exchanger, thereby improving heating performance and fuel efficiency.