Heat pump system for vehicle

A heat pump system for a vehicle, comprising:

• a cooling system including a radiator connected to a cooling line and a first water pump, the cooling system configured to circulate a coolant along the cooling line so as to cool an electric component;
• a battery module provided on a battery cooling line selectively connected to the cooling line through a first valve;
• a heating, ventilation, and air conditioning (HVAC) module including an internal heater connected to the cooling line through a first connection line, a cooler connected to the battery cooling line through a second connection line, and an opening or closing door provided between the internal heater and the cooler and configured to control external air passing through the cooler to be selectively introduced into the internal heater depending on cooling, heating, and heating and dehumidifying modes of the vehicle;
• a second valve provided on the cooling line between the radiator and the battery module;
• a third valve provided on the cooling line between the electric component and the first valve;
• and
• a centralized energy (CE) module connected to each of the battery cooling line and the cooling line, the CE module configured to exchange thermal energy generated when condensing and evaporating a refrigerant circulated therein with heat of the coolant, and to supply a low-temperature or high-temperature coolant of which the heat is exchanged to the HVAC module, wherein the CE module comprises:
• a condenser provided on the cooling line between the second valve and the third valve;
• an expansion valve connected to the condenser through a refrigerant line;
• an evaporator connected to the expansion valve through the refrigerant line and provided on the battery cooling line between the battery module and the first valve;
• and
• a compressor provided on the refrigerant line between the evaporator and the condenser;
• wherein a first branch line connecting the evaporator and the battery module to each other through the first valve is provided on the battery cooling line;
• wherein the second connection line is connected to the battery cooling line through a fourth valve between the evaporator and the battery module connected to each other through the first branch line;
• wherein a second branch line connected to the cooling line between the radiator and the first water pump through a fifth valve is provided on the cooling line connecting between the electric component and the radiator;
• and
• wherein the heat pump system further comprises a reservoir tank connected to the second branch line between the radiator and the first water pump.