Vehicle heat pump system
An embodiment of the present invention provides a vehicle heat pump system including a compressor configured to compress and circulate a refrigerant, a condenser configured to condense the compressed refrigerant, a first expansion valve configured to expand the condensed refrigerant, an evaporator configured to evaporate the refrigerant expanded by the first expansion valve by allowing the refrigerant to exchange heat with a coolant, a cabin cooler configured to cool a vehicle interior by allowing the coolant having passed through the evaporator to exchange heat with air, and a radiator configured to allow the coolant for cooling an electrical component to exchange heat with outside air, in which the coolant having passed through the radiator flows into the evaporator in a heating mode.
1 . A vehicle heat pump system comprising:
a compressor configured to compress and circulate a refrigerant;
a first heat exchanger configured to condense the compressed refrigerant;
a first expansion valve configured to expand the condensed refrigerant;
a second heat exchanger configured to evaporate the refrigerant expanded by the first expansion valve by allowing the refrigerant to exchange heat with a coolant;
a cabin cooler configured to cool a vehicle interior by allowing the coolant having passed through the second heat exchanger to exchange heat with air;
a heat-dissipation heat exchanger configured to allow the coolant for cooling an electrical component to exchange heat with outside air,
a refrigerant circulation line in which the compressor, the first heat exchanger, the second heat exchanger, and a chiller are disposed and the refrigerant circulates;
a refrigerating line configured to cool a heat generating component by circulating the coolant that exchanges heat with air or the refrigerant;
a cooling line in which the cabin cooler is disposed, the cooling line being configured to cool the vehicle interior by using the coolant passing through the second heat exchanger; and
a cooling connection line configured to connect the cooling line and the refrigerating line, wherein the coolant having passed through the heat-dissipation heat exchanger flows into the second heat exchanger in a heating mode; and
wherein the refrigerating line and the cooling line are connected by a first direction switching valve, and the refrigerating line and the cooling line are separated and connected depending on an air conditioning mode.
2 . The vehicle heat pump system of claim 1 , wherein one side of the cooling connection line is disposed between the second heat exchanger and the cabin cooler.
3 . The vehicle heat pump system of claim 1 , further comprising:
a heating line configured to heat the vehicle interior by circulating the coolant that exchanges heat with the refrigerant through the first heat exchanger.
4 . The vehicle heat pump system of claim 3 , comprising:
a first connection line branching off from one side of the refrigerating line and connected to the heating line; and
a second connection line branching off from the other side of the refrigerating line and connected to the heating line.
5 . The vehicle heat pump system of claim 4 , wherein the first connection line, the second connection line, and the heating line are connected to a second direction switching valve, and the refrigerating line and the heating line are connected to or disconnected from each other by the second direction switching valve.
6 . The vehicle heat pump system of claim 5 , wherein a third connection line branching off from a first coolant joint disposed in the refrigerating line is disposed to pass through the chiller, and a third direction switching valve connected to the refrigerating line is disposed in the third connection line.
7 . The vehicle heat pump system of claim 6 , wherein the third connection line is disposed in parallel with the refrigerating line in which the heat generating component is disposed.
8 . The vehicle heat pump system of claim 6 , wherein the heat generating component is disposed in the third connection line, a fourth connection line is disposed between the heat generating component and the chiller, one side of the fourth connection line is connected to the second connection line, the other side of the fourth connection line is connected to the third connection line, and a fourth direction switching valve is disposed in a region in which the second connection line and the fourth connection line are connected.