The iSC series developed by Dongho is a newly developed welding process product, which is used for airtight welding of copper tubes in the refrigeration circuit. The copper tubes in which the refrigerant circulates are installed in the refrigeration circuit. This application is also suitable for aluminum tubes, sealing The method is developed by Dongho technology, with stricter standard deviation and significantly higher process capability, providing stronger welding strength, modular design combined with control system, multiple welding modes and trigger modes, easy to operate, no open flame, no open flame during cutting and welding Smoke and odor will not have any adverse effects on operators. There is an automatic alarm function for defective welding products, and the degree of automation integration is high and the welding consistency is good. It is suitable for products such as refrigerators and air conditioners.