Large surface heat exchanger panels prodn. for space heating - using two dimpled rolled metal or plastics sheets seam welded at edges and spot welded in dimples

摘要

Large surface area heat exchangers are produced from two sheets of rigid material of approx. the same width. At least one of these has been subjected to a forming process, e.g. rolling, to create a pattern of depressions or dimples across its surface. The two sheets are continuously laid one on the other and then fixed mechanically e.g. by spot welding in the dimples. The edges are sealed e.g. by seam welding to give a water-tight joint. Both the sheets can have a pattern of dimples. The joint can be by bonding or welding and the sheets made from metal or plastic. A plastic coated metal sheet can be used and heated to just above the melting point of the plastic to give the bond. Used e.g. for domestic space heating. PErmits large areas of heat transfer to be created without the need for a number of pipe connections as between a number of smaller units.