Heat pump system for vehicle

A heat pump system for a vehicle comprising:

• air conditioning devices connected to each other through refrigerant piping to adjust operations of cooling and heating an interior of a vehicle by circulating a refrigerant in accordance with a heating mode and a cooling mode of an electric vehicle;
• an outdoor condenser to condense the refrigerant;
• an expansion valve configured to expand the refrigerant condensed by the outdoor condenser;
• an evaporator configured to evaporate the refrigerant expanded by the expansion valve;
• a compressor configured to compress the refrigerant evaporated by the evaporator;
• an indoor condenser configured to primarily condense the refrigerant compressed by the compressor and connected to the outdoor condenser;
• a radiator connected to electronic equipment through coolant piping and configured to cool a coolant having a temperature raised by cooling the electronic equipment, using heat exchange with outside air;
• a chiller configured integrally with the radiator, connected to the refrigerant piping, and configured to exchange heat between the coolant and the refrigerant;
• first connecting piping configured to connect the refrigerant piping and the chiller to each other between the outdoor condenser and the expansion valve;
• and
• second connecting piping configured to connect the refrigerant discharged from the chiller to the refrigerant piping disposed between the evaporator and the compressor.