초록 ▼

A radiator includes a plurality of flat tubes in which refrigerant flows, corrugated fins each of which is disposed between adjacent the flat tubes, and a header tank disposed at both end sides of each flat tube in a longitudinal direction of the flat tubes. A plurality of insertion holes into which

A radiator includes a plurality of flat tubes in which refrigerant flows, corrugated fins each of which is disposed between adjacent the flat tubes, and a header tank disposed at both end sides of each flat tube in a longitudinal direction of the flat tubes. A plurality of insertion holes into which the flat tubes are inserted are formed in a tank portion of the header tank, and each of the insertion holes has a hole width approximately equal to a tank width of the header tank in a width direction perpendicular to both of the longitudinal direction of the flat tubes and an extending direction of the header tank. The tank portion of the header tank is integrally formed from extruding or drawing, and the insertion holes are formed by shaving the tank portion after the extruding or drawing. Thus, the insertion holes can be readily provided in the tank portion integrally formed from the extruding or the drawing, and pressure tightness and manufacturing workability of the header tank can be improved.

대표청구항 ▼

[ What is claimed is:] [1.] A heat exchanger comprising:a plurality of tubes in which a fluid flows, each of said tubes having both ends in a longitudinal direction; anda header tank having a tank portion extending in an extending direction perpendicular to said longitudinal direction, said tank por

[ What is claimed is:] [1.] A heat exchanger comprising:a plurality of tubes in which a fluid flows, each of said tubes having both ends in a longitudinal direction; anda header tank having a tank portion extending in an extending direction perpendicular to said longitudinal direction, said tank portion being connected to said ends of said tubes at predetermined positions, wherein:said tank portion defines a plurality of tank passages extending in said extending direction, said tank passages being arranged in a width direction perpendicular to both of said longitudinal direction of said tubes and said extending direction of said tank portion;said tank portion has insertion holes into which said tubes are inserted, at said predetermined positions; andeach of said insertion holes has a hole width in said width direction, said hole width being approximately equal to a tank width of said tank portion in said width direction.