HEAT PUMP SYSTEM FOR A VEHICLE

A heat pump system for a vehicle capable of improving the overall efficiency of the system as well as simplifying the system is disclosed. The heat pump system adjusts the temperature of a battery module by using a single chiller where the refrigerant and the coolant are heat-exchanged, recollects waste heat of the electrical components and the battery module for heating of the vehicle, and forms a plurality of coolant flowing lines by using a single valve according to a selected mode of the vehicle.