Welding method of copper tube and aluminum tube of air conditioner

The welding methods of air conditioning copper pipe and aluminum pipe mainly include the following:

1. Flame welding: This is a traditional welding method. The joint of copper tube and aluminum tube is heated to a certain temperature by flame, so that they are welded together. However, this method may have some problems, such as unsightly welding and low welding strength.

2. High frequency welding: High frequency welding is an advanced welding technology. The joint of copper tube and aluminum tube is heated to welding temperature by high frequency current, and then they are welded together under a certain pressure. The advantages of this method are high welding speed, beautiful weld and high welding strength.

3. Argon arc welding: Argon arc welding is a common welding method, which can protect the molten pool from oxidation by producing argon protective layer at the welding site, thus improving the welding quality. This method is suitable for welding thin copper pipes and aluminum pipes, but the welding speed is relatively slow.

4. Laser welding: Laser welding is a welding method with high energy density. The welding parts are locally heated by laser beam, so that they can be quickly melted and connected together. This method has the advantages of fast welding speed, beautiful weld and high weld strength, but the equipment investment cost is high.

5. Brazing: Brazing is a method of connecting copper pipes and aluminum pipes by adding solder. Solder does not melt during welding, but connects copper tubes and aluminum tubes by diffusion. This method is suitable for welding thin copper pipes and aluminum pipes, but the welding strength is relatively low.

To sum up, there are many welding methods for air-conditioning copper pipes and aluminum pipes, and which method to choose should be determined according to the actual situation and welding requirements.