How to solve the impurities and moisture in the refrigerant of the refrigerator?

Industrial refrigerators used by enterprises, especially medium and large refrigerators, are basically equipped with drying and filtering devices. Drying and filtering devices are not new. 1. It has been developed for many years, and it has the function of intercepting foreign matter and moisture in the refrigerant of the refrigerator to the greatest extent, so as to prevent the moisture and foreign matter in the refrigerant from circulating into the refrigerator system, resulting in poor cooling effect of the refrigerator, or even Parts are damaged.