UNIT CONSTRUCTION PLATE-FIN HEAT EXCHANGER

摘要

A heat exchanger for transferring heat between an external fluid and an internal fluid includes two or more heat exchange cells, each heat exchange cell havi ng a top plate with an inlet aperture at one end thereof and an outlet aperture at th e other end thereof, the top plate including a first surface, a second surface and peripheral edges. The heat exchange cell also includes a bottom plate juxtaposed with the top plate, the bottom plate having an inlet aperture at one end thereof and an outlet aperture at the other end thereof. The bottom plate includes a first surface, a second surfa ce and peripheral edges. The peripheral edges of the top and bottom plates are attached to one another, the second surfaces of the top and bottom plates confronting on e another and the inlet and outlet apertures of the top and bottom plates being in substantial alignment with one another. The attached top and bottom plates define a high pressure chamber between the second surfaces thereof. The inlet and outlet apertures of the top and bottom plates including substantially curvilinear S-shaped raised flange portions extending away from the first surfaces of the plates, the substantially curvilinear S-shaped raised flange portions terminating at interior edges bounding the apertures. Each heat exchange cell includes an internal finned member dispos ed between and attached to the second surfaces of the respective top and bottom plates, wherein the heat exchange cells are assembled one atop the other and attache d to one another solely through the interior edges of the raised flanges for forming a compliant bellows structure elastically absorbing deflections produced during thermal loading so that the heat exchange cells move and flex relative to one another.