Repair process of heat exchanger for refrigeration

The invention relates to a repair process of a heat exchanger for refrigeration. The repair process comprises the following production steps of S1, scissors, pliers, a flaring device, a blade, a cutter bar, a push rod, an expansion rod and an expansion head which need to be used are prepared; S2, the blade is adopted to be matched with the cutter bar, the cutter bar is driven into an inner cavityof a damaged U-shaped copper pipe fitting through an air gun, two notches are formed; S3, the U-shaped copper pipe fitting part and the pipe orifice part are trimmed by using the scissors and pliers;S4, a copper sheet in the middle part of the two notches are taken out by using the push rod; S5, after the copper sheet is taken out, a clamp is used for pulling the copper sheet to take out the whole copper pipe fitting; S6, a new U-shaped copper pipe fitting is inserted again; S7, the U-shaped copper pipe fitting is expanded to meet the requirement through the corresponding expansion rod; S8, the pipe orifice is repaire