AIR CONDITIONING SYSTEM FOR VEHICLE

An air conditioning system (10) for a vehicle is provided with a heat pump circulation path (18) through which a refrigerant body is circulated through a compressor (16). The heat pump circulation path (18) is provided with a condenser unit (20) which exchanges heat between the refrigerant body and the outside air, an expansion valve (22) which reduces the pressure of the refrigerant body sent from the condenser unit (20), a first evaporator (24) which exchanges heat between the refrigerant body and air for air conditioning, a heater (26) which exchanges heat between the refrigerant body and the air for air conditioning, and a second evaporator (30) which exchanges heat between the refrigerant body and a heat medium discharged from the cabin (14). The heat pump circulation path (18) is also provided with a bypass means (40) which, in heating operation, bypasses a main condenser (32) for constituting the condenser unit (20) and connects the heater (26) and a gas-liquid separation-type refrigerant body containing section (34). The configuration provides effects which minimize an increase in the number of dedicated parts required only in a heating mode and which, by effectively utilizing the system in a cooling mode, prevents a reduction in the air conditioning performance caused by the shortage of the refrigerant body.