Serpentine fin, round tube heat exchanger

A heat exchanger comprising:

• first and second spaced parallel headers;
• a plurality of planar serpentine conduits each having at least three generally parallel runs and terminating in opposed ends, said conduits being in generally spaced, side by side relation, one end of each conduit extending to and being in fluid communication with said first header and the other end of each of tube extending to and being in fluid communication said second header;
• a plurality of serpentine fin sheets, each sheet extending between as associated pair of said conduits;
• and
• additional sheets sandwiching and bonded to each of said fin sheets and bonded to each said associated pair of said conduits on a side of each conduit thereof so that said conduits are in turn sandwiched by said additional sheets bonded thereto, and so that a said additional sheet is interposed between each said conduit and the adjacent if sheet.

A heat exchanger comprising:

• first and second spaced parallel headers;
• a plurality of planar serpentine conduits having at least three generally parallel runs and terminating in opposed ends, said conduits being in generally spaced, side by side relation, one end of each conduit extending to and being mounted in fluid communication with said first header and the other end of each of conduit extending to and being mounted in fluid communication said second header;
• a plurality of louvered serpentine fin sheets, each sheet extending between an associated pair of said conduits and having generally parallel crests extending generally transverse to said runs;
• and
• additional sheets bonded to said crests and to respective sides of each said associated pair of said conduit so that a said additional sheet is interposed between each said conduit and the adjacent fin sheet.