Structure of heat exchanger tank

A heat exchanger tank structure comprising:

• a tank body formed from a bent metal plate in the shape of an elongated groove, said tank body having a bottom and two parallel sidewalls;
• a tube plate having an open side which confronts said bottom of said tank body, said open side adapted to securely be fitted to said tank body;
• said bottom of said tank body having, at its intermediate portion in the longitudinal direction, one or more intermediate first slits formed over the full width of said bottom in a parallel relationship in the width direction;
• and
• a metallic reinforcement member in the shape of a gate in plan having at its top a slit fitting portion adapted to mate with said intermediate first slit, said reinforcement member including two legs having a pair of intermediate second slits into which said two sidewalls of said tank body are inserted;
• wherein the top of said reinforcement member is fitted in said intermediate first slit of said tank body, with said pair of intermediate second slits of said reinforcement member clamping both sides of said tank body, to thereby provide a liquid-tight connection therebetween.

A heat exchanger tank structure comprising:

• a tank body formed from a bent metal plate in the shape of an elongated groove, said tank body having a bottom and two parallel sidewalls;
• a tube plate in the shape of a shallow groove having an open side which confronts said bottom of said tank body, said open side adapted to securely be fitted to said tank body;
• said bottom of said tank body having a pair of end first slits formed over the full width of said bottom in a parallel relationship in the width direction;
• and
• a pair of reinforcement side lids having an outer periphery which conforms to the grooved-shaped section of said tank body, said pair of reinforcement side lids each having at its bottom edge a slit fitting portion which mates with corresponding one of said pair of end first slits, said pair of reinforcement side lids each having a pair of end second slits which receive said sidewalls of said tank body, said pair of reinforcement side lids each having a protrusion formed on an edge confronting said tube plate;
• said tube plate having a pair of locking holes formed in said tube plate at its opposite ends, said locking hole adapted to mate with said protrusion;
• wherein the top of each of said pair of reinforcement side lids is fitted in corresponding one of said pair of end first slits such that said pair of end second slits clamp said two sidewalls of said tank body and that said protrusions are fitted in said locking holes of said tube plate, to thereby provide a liquid-tight connection therebetween.