Patent ID: 6102111
Filing Date: 2000-08-15
Classification: F28D,F28F,Y10S

Abstract:
A heat exchanger which is formed from a folding plate blank (21) comprising a plurality of first heat-transfer plates (S1) and a plurality of second heat-transfer plates (S2) which are alternately connected together through first and second folding lines (L.sub.1 and L.sub.2), said folding plate blank (21) being folded in a zigzag fashion along said first and second folding lines (L.sub.1 and L.sub.2), so that a gap between adjacent ones of said first folding lines (L.sub.1) is closed by bonding said first folding lines (L.sub.1) and a first end plate (6) to each other, while a gap between adjacent ones of said second folding lines (L.sub.2)is closed by bonding said second folding lines (L.sub.2) and a second end plate (7), whereby high-temperature and low-temperature fluid passages (4 and 5) are defined alternately between adjacent ones of said first and second heat-transfer plates (S1 and S2),and in which opposite ends of each of said first and second heat-transfer plates (S1 and S2) in a flowing direction are cut into angle shapes each having two end edges, and a high-temperature fluid passage inlet (11) is defined by closing one of said two end edges and opening the other end edge at one end of said high-temperature fluid passage (4) in the flowing direction, while a high-temperature fluid passage outlet (12) is defined by closing one of said two end edges and opening the other end edge at the other end of said high-temperature fluid passage (4) in the flowing direction, and further, a low-temperature fluid passage inlet (15) is defined by opening one of said two end edges and closing the other end edge at the other end of said low-temperature fluid passage (5) in the flowing direction, while a low-temperature fluid passage outlet (16) is defined by opening one of said two end edges and closing the other end edge at one end of said low-temperature fluid passage (5) in the flowing direction, and a partition plate (8) is bonded to an apex of said angle shape at one end in the flowing direction to partition said high-temperature fluid passage inlet (11) from said low-temperature fluid passage outlet (16), while a partition plate (10) is bonded to an apex of said angle shape at the other end in the flowing direction to partition said low-temperature fluid passage inlet (15) from said high-temperature fluid passage outlet (12),characterized in that bonded portions of the apex of said angle shape at said one end in the flowing direction with said partition plate (8) and/or bonded portions of the apex of the angle shape at said other end in the flowing direction with the partition plate (10) are comprised of a pair of bonding flanges (27 and 28) which are brought into surface contact with and integrally bonded to a bonding base plate (26), said pair of bonding flanges (27 and 28) being bifurcated from an end of said partition plate (8) extending in the flowing direction and extending in a direction perpendicular to the flowing direction, and said bonding base plate (26) being disposed in the direction perpendicular to the flowing direction and bonded to said apex.