HEAT PUMP SYSTEM FOR VEHICLE

Disclosed is a heat pump system for a vehicle that includes: a compressor which compresses and discharges a refrigerant; an indoor heat exchanger which is provided in an air-conditioning case and exchanges heat with air discharged into the indoor space of the vehicle; an outdoor heat exchanger which is provided on the outer portion of the air-conditioning case and exchanges heat with external air; and a first expansion valve which expands the refrigerant, and the heat pump system carries out heating and cooling of the indoor space of the vehicle through the indoor heat exchanger while controlling the flow of the refrigerant discharged from the compressor, wherein the indoor heat exchanger is divided into a plurality of columns on an air passage in the air-conditioning case and includes a refrigerant direction switching portion which controls the flow of the refrigerant.