Finned heat transfer device and method for making same

Details Finned heat transfer device and method for making same Finned heat transfer device and method for making same

F - Mech Eng,Light,Heat,Weapons

28

F

257/27

F28F 1/36 (2006.01) B21C 37/26 (2006.01)

Patent

CA 1292466

ABSTRACT The invention provides a fin structure, and a method and apparatus for forming a fin structure, for application to the exterior of a tube to form a heat transfer device effective in minimizing frost bridging in refrigeration operations. The fin structure is wound helically onto a refrigerant-carrying tube, and comprises an integrally formed chain of looped fins, each looped fin having a mounting flange at each end thereof and comprising two vertical fin portions extending respectively from each mounting flange and connected together by a bridge portion; the method and apparatus for making the same includes a unitary stretch preforming process to reform thin lanced sheet metal fin stock into the final looped fin shape in a single forming step.

515218

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