Combined heat exchanger

Abstract

A combined heat exchanger includes a first heat exchanger, a second heat exchanger accommodated in a first tank of the first heat exchanger, and a third heat exchange disposed above or beneath the first heat exchanger. First refrigerant flowing in the first tank exchanges heat with second refrigerant flowing in the second heat exchanger, and the second refrigerant that has exchanged heat flows into a third tank of the third heat exchanger. The second heat exchanger includes a refrigerant flow-in port and a refrigerant flow-out port. The refrigerant flow-in/flow-out ports are disposed at positions opposed to each other on the first tank. The refrigerant flow-out port is connected with the third tank. According to the combined heat exchanger, the refrigerant flow-in/flow-out ports aren't protruded laterally outward from the second heat exchanger, and thereby layout flexibility of the refrigerant flow-in/flow-out ports can be improved.

1 . A combined heat exchanger comprising:
 a first heat exchanger;   a second heat exchanger that is accommodated in a first tank of the first heat exchanger; and   a third heat exchanger that is disposed above or beneath the first heat exchanger, wherein   first refrigerant flowing in the first tank exchanges heat with second refrigerant flowing in the second heat exchanger, and the second refrigerant that has exchanged heat flows into a third tank of the third heat exchanger,   the second heat exchanger includes a refrigerant flow-in port into which the second refrigerant flows and a refrigerant flow-out port from which the second refrigerant flows out,   the refrigerant flow-in port and the refrigerant flow-out port are disposed at positions opposed to each other on the first tank, and   the refrigerant flow-out port is connected with the third tank.   
     
     
         2 . The combined heat exchanger according to  claim 1 , wherein,
 the first tank is protruded outward from the third tank, and   the refrigerant flow-out port is arranged in a space formed on an outside of the third tank, and is connected with the third tank via an intermediate pipe communicating with the third tank.   
     
     
         3 . The combined heat exchanger according to  claim 1 , further comprising
 a refrigerant accumulation tank that accumulates the second refrigerant flowing in the third heat exchanger, wherein   the refrigerant accumulation tank is disposed on an opposite side to the third tank in the third heat exchanger.   
     
     
         4 . The combined heat exchanger according to  claim 1 , wherein
 the third tank includes a flow-in position at which the second refrigerant inflows, and a flow-out position at which the second refrigerant outflows, and   the flow-in position and the flow-out position are distanced away from each other.   
     
     
         5 . The combined heat exchanger according in  claim 1 , wherein
 the third tank includes a connector that is connected with the refrigerant flow-out port.   
     
     
         6 . The combined heat exchanger according to  claim 1 , wherein
 the refrigerant flow-out port is directly connected with the third tank.   
     
     
         7 . The combined heat exchanger according to  claim 1 , wherein
 the first heat exchanger is a sub radiator,   the second heat exchanger is a water-cooled condenser, and   the third heat exchanger is an air-cooled condenser.   
     
     
         8 . The combined heat exchanger according to  claim 1 , wherein
 an insertion hole through which the second heat exchanger is inserted into the first tank, and an opening opposed to the insertion hole are formed on the first tank,   the second heat exchanger includes a plurality of tubes, a pair of tanks that are connected with both ends of the tubes,   the refrigerant flow-in port is attached to one of the tanks,   the refrigerant flow-out port is attached to another of the tanks,   one side of the second heat exchanger where the one of the tanks and the refrigerant flow-in port are provided is fixed with the insertion hole, and the refrigerant flow-in port is exposed outside, and   another side of the second heat exchanger where the other of the tanks and the refrigerant flow-out port are provided is fixed with the opening.   
     
     
         9 . The combined heat exchanger according to  claim 8 , wherein
 each of the refrigerant flow-out part and the opening is formed to have a hollow cylindrical shape, and   the other side of the second heal exchanger is fixed with the opening in a state where the refrigerant flow-out port passes through the opening.   
     
     
         10 . The combined heat exchanger according to  claim 9 , wherein
 a sealing member is interposed between the refrigerant flow-out port and the opening.