Double heat exchanger having condenser core and radiator core

A double heat exchanger comprising:

• a first core for performing heat exchange between a first fluid and air, said first core having a plurality of first tubes through which said first fluid flows;
• a first aluminum header tank extending in an extending direction perpendicular to a longitudinal direction of said first tubes and being connected to one end of each first tube in the longitudinal direction;
• a second core for performing heat exchange between a second fluid and air, said second core having a plurality of second tubes through which said second fluid flows, the second fluid flowing through the second tubes being different from the first fluid flowing through the first tubes, a temperature difference between said second fluid and said first fluid being greater than a predetermined value;
• and
• a second aluminum header tank extending in a direction parallel to said extending direction of said first header tank and being connected to one end of each second tube in a longitudinal direction of said second tubes, wherein:
• said first core and said second core are arranged in a straight line in an air flowing direction;
• said first header tank has a first protruding portion separate from said second header tank which protrudes toward said second header tank to contact said second header tank;
• said first protruding portion being brazed to said second header tank to form a clearance between an outer surface of the first header tank and an outer surface of the second header tank;
• said first header tank includes a first plate connected to said first tubes, and a first tank portion connected to said first plate;
• said first plate has a clamping portion protruding toward said first tank portion;
• and
• said clamping portion is bent in the extending direction of said first header tank when the first plate is connected to said first tank portion.