Integrated heat exchanger

An integrated heat exchanger comprising:

• a radiator including (1) a first tank and a second tank, and (2) a plurality of tubes extending between said first tank and said second tank, both ends of said plurality of tubes opening to inner spaces of said first tank and said second tank;
• a condenser adjoining said radiator and sharing corrugated fins with said radiator, said condenser including a first tank, a second tank and a partition provided in said first tank, wherein coolant flows between said first tank and said second tank of said condenser while returning at least one time on a side of the second tank;
• and
• opening/closing means being disposed in the inner space of said first tank of said radiator, said opening/closing means being opened when a temperature of cooling water reaches a given temperature or more, said opening/closing means being closed when the temperature of the cooling water is less than the given temperature, thereby partitioning the inner space of said first tank of said radiator into a first inner space and a second inner space, wherein a first group of said plurality of tubes opens to said first inner space of said first tank and a second group of said plurality of tubes opens to said second inner space of said first tank,
• wherein, (A) when the temperature of the cooling water reaches the given temperature or more, the cooling water flows through the first inner space and the second inner space of said first tank, all of said plurality of tubes and the inner space of said second tank, and (B) when the temperature of the cooling water is less than the given temperature, the cooling water flows through the first inner space of said first tank, said first group of tubes and the inner space of said second tank, but not through the second inner space of said first tank and said second group of tubes, whereby all of said plurality of tubes serve heat transfer from the cooling water to outside air in the case of (A), and only said first group of tubes serves heat transfer from the cooling water to the outside air in the case of (B), and
• wherein said radiator and said condenser are adjoins with each other so that a lower temperature side of the coolant flowing in said condenser adjoins said second group of tubes.