Abstract
Currently, the use of artificial cold is one of the main factors of economic, environmental and social life of the world. Any modern science, technology and technology cannot provide without artificial cold. And artificial cold is implemented with the help of refrigeration units. The article discusses the principles of operation of the refrigeration unit in the optimal mode of operation and in case of a malfunction of the heat exchanger. Various problems were compared with the optimal mode of operation and conclusions were given. All research work was carried out experimentally, as well as proved by a thermal imager (thermal imager). Detailed data were presented in the form of tables and diagrams. As a result of the analysis of the data, the use of a multi-factor experimental method was revealed. Individual and generalized conclusions were made on the processes of the refrigerator in each case of a malfunction.