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US 6,691,774 B2Granted
Heat exchanger fabrication by polymer extrusion and structures formed thereby
AssigneeE. I. Du Pont de Nemours and Company
InventorEldon Lawrence Fletcher
Life of this patent
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Abstract
A process for making a multilayer plastic tube heat exchanger with a ribbon of molten polymer being poured over layers of tubes, and then another layer of tubes being added and another ribbon of polymer. Heat exchanger structures so formed are also disclosed.
Claims5
A process for fabricating a plastic tube bundle for a heat exchanger structure comprising:
- forming a layer of polymeric tubes having a plurality of tubes held in proximity and side by side to each other,
- pouring molten polymer over the tubes sufficient to embed the tubes therein,
- positioning an additional layer of such tubes on the polymer while said polymer is still soft, so that the tubes are embedded in the layer,
- pouring additional molten polymer over the additional layer of tubes,
- repeating the last two steps at least once to form a bundle,
- said bundle being allowed to cool to harden the polymer, and
- fashioning the tube bundles including the ends of the tubes encased in said polymer to communicate with one or more headers to collect heat exchange fluid.
4 more elements
Dependencies are inferred from the claim text.