Different types of oil fume purification equipment have different cleaning cycles and cleaning methods. Under normal circumstances, normal cleaning and maintenance will not affect the normal business of restaurants, but the length of maintenance cycle and the labor intensity and trouble of each maintenance indicate the credibility of the manufacturer's commitment to long-term maintenance of equipment in the future. The cleaning cycle with an interval of more than one month and the cleaning and maintenance time with a length of no more than one hour for each zui are the technical standards that ordinary catering fume purifier equipment can hardly meet, while the high-performance purifier equipment can basically be cleaned once every two months, and only takes about half an hour each time.