Flat tube for heat exchanger, has two narrow sides and two broadsides formed by three sheet metal strips with deformed longitudinal edges

摘要

The flat tube has two narrow sides and two broadsides formed by three sheet metal strips with deformed longitudinal edges (a1,a2,b1,b2,c1,c2). The deformed longitudinal edges of a corrugated internal insert (c) are arranged between the deformed longitudinal edges of two wall-forming sheet metal strips, around which reinforced narrow sides are formed. The sheet metal strips are made of an aluminum alloy, and are provided as an aluminum silicon solder layer. An independent claim is included for a method for manufacturing a flat tube.