Air conditioning system for mobility
An air conditioning system includes a refrigerant circuit including a compressor, a condenser, an expander, and an evaporator, a first coolant line including a first heat exchanger and a first air conditioning heat exchanger, a second coolant line including a second heat exchanger, connected so that coolant in the first coolant line flows by connecting upstream and downstream ends of a second air conditioning heat exchanger to upstream and downstream ends of the first air conditioning heat exchanger, and a first valve selectively controlling the flow of coolant in the first coolant line on the upstream end of the first air conditioning heat exchanger, and a controller controlling the first valve in a heating mode so that coolant cooled by the first heat exchanger in the first coolant line flows to the first air conditioning heat exchanger and to the second air conditioning heat exchanger.
1 . An air conditioning system comprising:
a refrigerant circuit configured to circulate a refrigerant, the refrigerant circuit comprising a compressor, a condenser, an expander, and an evaporator;
a first coolant line configured to circulate a coolant, the first coolant line comprising a first heat exchanger configured and positioned to exchange heat with the evaporator of the refrigerant circuit and a first air conditioning heat exchanger configured to adjust the temperature of air conditioning air through heat exchange with the coolant;
a second coolant line configured to circulate the coolant, the second coolant line comprising:
a second heat exchanger connected in the air conditioning system so that coolant in the first coolant line can flow from an upstream end to a downstream end of a second air conditioning heat exchanger and then to an upstream end and to a downstream end of the first air conditioning heat exchanger, wherein:
the second heat exchanger is configured and positioned to exchange heat with the condenser of the refrigerant circuit, and
the second air conditioning heat exchanger is configured to adjust the temperature of the air conditioning air through heat exchange with the coolant; and
a first valve configured to selectively control the flow of coolant in the first coolant line at the upstream end of the first air conditioning heat exchanger; and
a controller configured to control the first valve in a heating mode so that coolant cooled by the first heat exchanger in the first coolant line flows to the first air conditioning heat exchanger and to the second air conditioning heat exchanger.
2 . The air conditioning system of claim 1 , wherein:
the first coolant line further comprises a first water pump, and
the second coolant line further comprises a second water pump and a coolant heater.
3 . The air conditioning system of claim 1 , wherein:
the second coolant line further comprises a first outdoor heat exchanger and a second valve, and
the coolant passing through the second heat exchanger selectively flows to a second air conditioning heat exchanger side or to a first outdoor heat exchanger side by the second valve.
4 . The air conditioning system of claim 1 , wherein the second coolant line further comprises a third valve configured to allow coolant passing through the second air conditioning heat exchanger on the downstream end of the second air conditioning heat exchanger to selectively flow to a first coolant line side or to a second heat exchanger side.
5 . The air conditioning system of claim 4 , wherein the controller is further configured to:
control the first valve in a cooling mode so that coolant cooled through the first heat exchanger in the first coolant line flows to the first air conditioning heat exchanger and to the second air conditioning heat exchanger; and
control the third valve so that coolant passing through the second air conditioning heat exchanger is recirculated to the first coolant line.
6 . The air conditioning system of claim 4 , wherein the controller is further configured to:
control the first valve in the heating mode so that coolant heated through the second heat exchanger in the second coolant line flows to the second air conditioning heat exchanger; and
control the third valve so that coolant passing through the second air conditioning heat exchanger is recirculated to the second heat exchanger.
7 . The air conditioning system of claim 4 , wherein:
the first coolant line further comprises a fourth valve and a fifth valve respectively provided on respective upstream ends and downstream ends of a second outdoor heat exchanger and the first heat exchanger; and
coolant passing through the first heat exchanger selectively circulates to a first air conditioning heat exchanger side or to a second outdoor heat exchanger side by the fourth valve and the fifth valve.
8 . The air conditioning system of claim 7 , further comprising a third coolant line connected to the fourth valve and to the fifth valve of the first coolant line, wherein the third coolant line comprises a battery.
9 . The air conditioning system of claim 8 , wherein the second coolant line is branched from a branch pipe between the second heat exchanger and the first valve and is connected to the third coolant line via a sixth valve on an upstream end of the battery.
10 . The air conditioning system of claim 8 , wherein the third valve is a four-way valve configured to selectively circulate coolant to the second heat exchanger side, to a second air conditioning heat exchanger side, to a battery side, and to a first heat exchanger side.
11 . The air conditioning system of claim 8 , wherein:
the third valve is a three-way valve configured to selectively circulate coolant to the second heat exchanger side, to a second air conditioning heat exchanger side, and to a battery side;
the second coolant line comprises a branch line connected to the fifth valve of the first coolant line at the downstream end of the second air conditioning heat exchanger; and
the branch line comprises a seventh valve.
12 . The air conditioning system of claim 1 , further comprising a fourth coolant line branched from the first coolant line, wherein:
the fourth coolant line comprises an electronic component, a third outdoor heat exchanger, and an eighth valve, and
wherein coolant can selectively flow to the electronic component or to the third outdoor heat exchanger via the eighth valve.