| 摘要 |
<p>Plates of identical configuration are formed of relatively thin material and are assembled in stacked construction pairs, with alternating patterns of different corrugations being provided between spaced openings in each plate. Alternate plates in each stack provide corrugation patterns with transverse relationship assuring turbulence-inciting structure in both primary and secondary flow passages. Pairs of plates are formed by assembling the identical plates in back-to-back relationship to form a construction pair, with the pairs of plates being secured together by sealing only two surfaces of substantially uniform thickness of plate. The construction of the stack of plates is accomplished without necessity for provision of tubular inlet and outlet channels extcnding through the stack structure. The plates, being of identical configuration and construction, reuce the number of hydroform punch and dies required, facilitate continuous flow production, minimize tooling die upkeep, and minimize production halts due to die temperaturedimension changes.</p> |
