FIELD: heating.
SUBSTANCE: flat tubes, heat exchangers of flat tubes and their manufacturing methods are described and illustrated. Flat tubes can be made from one, two or more fragments of sheets. A shaped insert that is non-detachable from the flat tube or made from other sheet can be used to form several passages through the flat tube. Flat tubes can be made from relatively thin material and can be reinforced by means of material bends of flat tube and/or insert in the areas subject to actions of higher pressures and temperatures. Besides, relatively thin material of flat tube can have a corrosive layer allowing the material to withstand the failure due to corrosion. Heat exchangers having such flat tubes connected to composite tubes are also described, as well as the methods, which can be provided for such tubes which can be equipped with fins.
EFFECT: easier manufacture and assembly of heat exchangers.
23 cl, 106 dwg
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Authors
Dates
2013-04-27—Published
2008-10-22—Filed