What's the good quality of the aluminum tubes used for air conditioning?
Benefits: 1., because the aluminum tube heat transfer speed faster than copper tube, it can improve the cooling efficiency,.2. aluminum tube cheaper than copperDisadvantages: 1., the pressure of the aluminum tube is better than that of the copper tube, and the.2. aluminum pipe is easy to corrodeNote: if a high temperature and high purity aluminum tube is coated with a fast and corrosion resistant metal, the above problems can be solved. If you are interested in doing experiments, you will change the history of refrigeration if the experiment is successful
Itself does not harm, and no impact on refrigeration, but it can not be all aluminum, copper must be part of, otherwise it can not be welded.The problem lies in the interface of copper and aluminum, the different metal bonded to each other, very easy to crack or blisters, thus leakage. And once the copper and aluminum interface leakage, can not be filled, air-conditioning can only be scrapped.
In fact, in process and technology now, and what is not with aluminum brass difference, only manufacturers reduce the cost, and users are influenced by the traditional view that no aluminum copper good, that their interests are hurt.
1. pure copper has excellent ductilityAir conditioning has a tube expanding process in the manufacturing process, is put through the fin copper pipe burst, let bobbin and fin precision contact tube expanding technology is the key performance of heat exchanger of air conditioning, the ductility of copper to ensure good not easy in this process is broken.2. copper has an unparalleled corrosion resistanceCopper is much more resistant to corrosion than aluminum in the outdoor hostile environment. Statue of Liberty has been thinned since 1886 for more than 120 years, and that is proof of 0.127mm.4. in the joint place with copper and aluminum composite, two kinds of metal binding sites are likely to occur electrochemical corrosion potential of copper is +0.34V standard, standard potential of aluminum -1.28V, the potential difference between copper and aluminum is +1.62V. If direct contact between copper and aluminum, water in the air and carbon monoxide and other harmful impurities will form electrolyte on the contact surface of the joint, causing electrochemical corrosion, which is called galvanic cell.
