Because the aluminum tube of refrigerator is relatively small and thin, it is mostly used for welding copper tube and aluminum tube, or aluminum tube and copper tube. Of course, there are aluminum tubes to aluminum tubes. Judging from the above three situations, it can be divided into the following welding methods.

1. If the aluminum tube is connected to the copper tube or the copper tube is connected to the aluminum tube, you can choose Viodine copper-aluminum covered electrode flame brazing welding, and the melting point of welding is about 480 degrees, so the flux-cored covered electrode does not need to be used with welding powder.

2. If aluminum pipes are connected with aluminum pipes, aluminum covered electrode of WEWELDING Q303 can be selected for welding. No need to mix solder powder. Use WE53 special liquefied gas spray gun to heat the welding part to about 500 degrees, then use welding wire to spot weld the welding part, and use flame to slightly burn the welding wire tip for molding. It can also be welded with ordinary ER4047 aluminum welding wire and aluminum welding powder WE53-F. This welding method has relatively low cost but high technical requirements. Suitable for experts.