초록 ▼

In a heat exchanger of the plate-fin type through which two fluid streams of different temperatures are passed through alternate layers in a cross-flow arrangement whereby heat transfer occurs between the two fluid streams, solid closure bars attached to the heat exchanger core are shaped and arrang

In a heat exchanger of the plate-fin type through which two fluid streams of different temperatures are passed through alternate layers in a cross-flow arrangement whereby heat transfer occurs between the two fluid streams, solid closure bars attached to the heat exchanger core are shaped and arranged in a manner such that the closure bars form a continuous protruding flange at the corners or along the length of the heat exchanger core. The headers, which previously were welded directly to the heat exchanger core, are now welded to the flange, thereby preventing damage to the brazed heat exchanger core components and adding flexibility between core and headers during thermal cycling. In a preferred embodiment the closure bars on one face of the heat exchanger have an “L”shape with the “L”extending away from the core, and the closure bars on the adjacent face are straight and extend beyond the edge of the core the same distance as the extended “L”and in the same plane to form a straight flange.

대표청구항 ▼

In a heat exchanger, a core comprising a plurality of stacked layers, each layer including a continuous corrugated fin element forming a plurality of parallel open-ended channels adapted to pass a fluid therethrough, alternate layers of said core being stacked so that the fluid flow through channels

In a heat exchanger, a core comprising a plurality of stacked layers, each layer including a continuous corrugated fin element forming a plurality of parallel open-ended channels adapted to pass a fluid therethrough, alternate layers of said core being stacked so that the fluid flow through channels in each layer is in a direction different from the channels in the adjacent layers, flat parting sheets attached to and separating each of said layers, cover members attached to the top and bottom layers to enclose said layers, first closure bars extending the length of alternate finned layers at the outsides of said core, said first closure bars extending between adjacent parting sheets, each of said first closure bars including a first 90°bend at one end thereof, said 90°bend defining in said bar a first bent portion extending a short distance away from said core, and second closure bars extending the length of the remaining alternate finned layers substantially perpendicular to said first closure bars, said second closure bars extending between adjacent parting sheets, each of said second closure bars including an unbent portion projecting beyond said core a distance equal to the length of the first bent portion of said first closure bars, the projecting portion of said second closure bars and the bent portion of said first closure bars being aligned in a plane and forming a flange extending away from said core.