Heat exchanger construction

摘要

A heat exchanger has a header tank 10 formed from punched and folded sheet metal folded up to form a chamber and closed along a seam 20. The base 16 of the tank is punched with apertures for coolant tubes 12. The sides can be formed with stiffening ribs or depressions 34 (Figure 4). The sheet metal can be the same metal as the coolant tubes, so that all the heat exchanger components can be brazed together in a single brazing operation.