The refrigeration and air-conditioning industry is one of the main consumption fields of copper materials. However, China's copper ore resources are relatively scarce, and the reserves are difficult to meet the demands of the consumption side. Different from copper materials, aluminum materials have a safe and controllable supply capacity. Therefore, promoting the research, development and application of the "aluminum replacing copper" technology in the refrigeration and air-conditioning industry not only helps the industry improve the competitiveness of its products, but also can effectively achieve cost reduction and efficiency improvement. This transformation can, to a certain extent, reduce the external dependence on copper resources, strengthen the security of the refrigeration and air-conditioning industrial chain, and has important strategic significance for safeguarding national economic security.

In recent years, with the rapid development of fields such as cold chain logistics, data centers, and heat pumps, the industry's demand for copper has further increased. As an important strategic mineral resource, the price of copper remains high, which increases the manufacturing costs of enterprises. And the treated aluminum materials are on a par with copper materials in terms of anti-corrosion, anti-leakage, compression resistance, plasticity and heat exchange performance.

Although copper materials dominate the traditional refrigeration and air-conditioning industry, stainless steel, as a new material, has good corrosion resistance and mechanical properties and is worthy of popularization and application. He emphasized that several key technical problems need to be solved during the process of stainless steel application, including the difficulty of plastic forming. The processing characteristics of stainless steel are very different from those of copper, and new processes and technologies need to be developed to improve its forming ability. In addition, he also pointed out that the welding reliability between copper and stainless steel is also an important issue. It is necessary to ensure the strength and durability of the welded joints to guarantee the safety and stability of the system.