Manufacturing of refrigeration application products is a field that manufactures product groups requiring precise temperature control, based on refrigeration cycle technology. It plays an indispensable role in a wide range of industries, including rapid freezing and refrigeration equipment for food, ultra-low temperature storage units for medical and biotechnology fields, process cooling systems for semiconductor manufacturing equipment and chemical plants, and commercial air conditioning equipment. In the manufacturing process, in addition to the selection, processing, and assembly of key components such as compressors, heat exchangers, expansion valves, and evaporators, high-precision piping work, the construction of insulation structures, and the design and implementation of complex control systems are required. To ensure product performance, refrigerant charging, airtightness testing, and performance evaluation are strictly carried out, and energy efficiency and reduction of environmental impact are also important factors.