Heat exchanger member and a method of producing it

F - Mech Eng,Light,Heat,Weapons – 24 – J

Patent

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126/11, 26/146,

F24J 2/26 (2006.01) B21D 53/04 (2006.01) B21D 53/08 (2006.01)

Patent

CA 1116035

ABSTRACT OF THE DISCLOSURE A heat exchanger for solar collector apparatuses comprises two metal layers abutting each other and at least one metal pipe for a heat-carrying medium arranged between the layers. The metal layers are cold-welded together on either side of the pipe to form heat-conveying fins and the pipe is cold-welded to at least one of the metal layers. The exchanger has a greater total goods thickness at the pipe than at the fins to allow a comparative- ly high heat-carrying medium pressure. For manufacturing the heat exchanger two metal strips and a metal pipe are continuously fed between two rolls, of which at least one is provided with a groove corres- ponding to the pipe. The roll pressure is selected so that the metal strips and the metal pipe are subjected during cold rolling to a thickness reduction of at least 60% during the passage between the rolls, so that the strips and the pipe are cold-welded together.

320235

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