The second use of supercritical carbon dioxide extraction in refrigerators. Environmental protection refrigerators are more advanced in terms of production technology and raw materials. Even if the equipment runs for a relatively long time, the equipment will not cause any failure. The present invention can avoid various failures of the equipment and improve the operation of the equipment. Safety prevents companies from using refrigerators for a long time to cause continuous increase in operating costs; reducing the cost of using refrigerators has not only become the dream of many companies. If they can use less energy consumption to complete their production tasks, they can save at least half of the cost of carbon dioxide. Critical extraction: Secondly, installing a muffler at the air inlet and outlet of the cooling tower fan can effectively reduce the noise around the air inlet meter-cooling performance does not mean that the main purpose of the cooling tower is cooling, so its cooling performance and cooling performance Must meet and meet the basic requirements of chillers. On this basis, high performance is pursued. How to ensure cooling performance Cooling towers usually guarantee heat dissipation performance based on area and flow rate.