Several heating pipes of Haier double-door refrigerator are connected as follows.
1. Find a section of copper-aluminum transition joint, cut it ten cm from the joint with a pipe knife, and put a 3~4 cm thin copper tube into the aluminum tube of the copper-aluminum transition joint and the aluminum tube of the evaporator. And align the two aluminum tube joints, point the welding torch, adjust the flame to carbonization flame (flame without flame core), heat the aluminum welding rod and glue aluminum welding powder, and heat the aluminum tube joint for rapid welding. In the welding must pay attention to the mastery of temperature, the temperature is too low, the electrode can not be fused on the aluminum tube, the temperature is too high aluminum tube is easy to melt, after welding to check whether there are pores, everything is normal and then weld the copper tube.
