This model is designed to show the operating principles of refrigerators. Due to the transparency of the outer structure, the system is observed easily. Inside the refrigerator, there are 5 fundamental parts: compressor, outer heat conversion tubes, expansion valve, inner heat conversion tubes and 2 heat indicators. and an explanation panel. The system also comes with an explanation panel. It serves to analyze the characteristics and reliability of the refrigerators which are an integral part of refrigeration systems and it can develop students’ hands-on experience.