Tank structure of heat exchanger

Abstract

In a tank structure of a heat exchanger 1 where end portions of a plurality of tubes 8 are inserted in and fixed to a tube plate 5, 6 of a tank 3, 4 that is made of aluminum material, a bead 12 a is provided at a position of a tube 8 side heading from a half position of a height H of a side wall portions 11 a and 11 b of the tank 3, 4 to extend in a direction perpendicular to a longitudinal direction of the tubes 8.

1 . A tank structure of a heat exchanger in which end portions of a plurality of tubes are inserted in and fixed to a bottom portion of a tank that is made of aluminum material, the tank structure characterized in that
 a bead is provided at a position of a tube side heading from a half position of a height of a side wall portion of the tank to extend in a direction perpendicular to a longitudinal direction of the tubes.   
   
   
       2 . The tank structure of the heat exchanger according to the  claim 1 , wherein
 the tank is formed like a vessel to open toward the tubes, and wherein   a tube plate, which is formed like a tray to open toward the tubes, forms the bottom portion of the tank by being fixed to a skirt-like shaped portion which has a cross section shaped like an L-letter and is formed around an opening peripheral portion of the tank in a state where the tube plate is press-fitted in to be overlapped with an inner side of the skirt-like shaped portion.   
   
   
       3 . A tank structure of a heat exchanger in which end portions of a plurality of tubes are inserted in and fixed to a bottom portion of a tank that is made of aluminum material, the tank structure characterized in that
 the tank is formed like a vessel to open toward the tubes, wherein   a tube plate is fixed to an opening peripheral portion of the tank, in a state where the tube plate and the opening peripheral portion are overlapped with each other, to form a bottom portion of the tank, and wherein W 1 ≧W 2 ×1.5, where W 1  is a plate thickness of the tank and W 2  is a plate thickness of the tube plate.   
   
   
       4 . The tank structure of the heat exchanger according to  claim 3 , wherein
 the tank is formed like a vessel to open toward the tubes, and wherein   a tube plate, which is formed like a tray to open toward the tubes, forms the bottom portion of the tank by being fixed to a skirt-like shaped portion which has a cross section shaped like an L-letter and is formed around an opening peripheral portion of the tank in a state where the tube plate is press-fitted in to be overlapped with an inner side of the skirt-like shaped portion.