Introduction of aluminum brazing

Introduction of aluminum brazing

The development of the widely used heat exchangers in automobiles (including components such as automobile air conditioner,condensers, evaporators, radiator tanks, oil coolers) is divided into three stages. Before the 1970s, most of the vehicles usedcopper heat exchangers. Aluminum heat exchangers began to appear in the 1970s. Compared with the traditional copper heat exchangers, theAluminum heat exchange efficiency was high, the weight was light, the cost was reduced, and reducing Automotive fuel consumption and other characteristics,isthe automotive metallurgical outstanding example in the late 20th century  .



The first generation of all-aluminum heat exchanger is a serpentine tube structure, using of hydraulic methods to assemble the aluminum pipe mechanical expansion tube and heatsink together. Freon as a refrigerant inside the heat exchanger. In 1970 by the French company Sofic first successfully developed and put into mass production. Compared with the copper heat exchanger, aluminum heat exchanger light weight 35-45%. 1978 Alcan invented NOCOLOK non-corrosive flux welding process. Subsequently, Japan's Furukawa Aluminum Company successfully developed high-precision, high-performance aluminum alloy brazing heat sink, a second-generation all-aluminum heat exchanger,is the brazed tubular heat exchanger production pioneer.

In the late 1990s, with the increasing environmental protection requirements, all-aluminum heat exchangers have developed to the environment-friendly. Compared with the previous products, the latest generation of all-aluminum heat exchangers are environmentally-friendly products, which use non-fluorine refrigerants. In order to keep the heat exchange rate unchanged, the new all-aluminum heat exchanger is designed as a parallel flow structure to ensure high heat exchange efficiency.