HEAT EXCHANGER AND PRODUCTION METHOD THEREFOR

摘要

A water-side tube (20) is made of copper or a copper alloy, a refrigerant-side tube (30) is made of aluminum or an aluminum alloy, the water-side tube (20) and refrigerant-side tube (30) are coiled in a spiral shape in a manner circling about a virtual axis (100) with the water-side tube (20) and refrigerant-side tube (30) in a mutually touching state, and the water-side tube (20) and refrigerant-side tube (30) are brazed together with an Al-Cu-Si or Al-Cu-Si-Zn brazing filler metal (50).