Abstract: A complex heat exchanger (1) according to the present invention includes a sub radiator (20) for cooling water-cooling cooling water passing through heavy current device (3), an air-cooled condenser (40) for cooling a air-conditioning refrigerant different from the water-cooling cooling water, and a water-cooled condenser (30) for performing heat exchange between the water-cooling cooling water and the air-conditioning refrigerant. The water-cooling cooling water flows into the sub radiator (20) after passing through the water-cooled condenser (30) and is cooled and then, the water-cooling cooling water is used for cooling of the heavy current device (3). The air-conditioning refrigerant cooled by the water-cooled condenser (30) flows into the air-cooled condenser (40).

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.