During the working process of the range hood, the impeller rotates at a high speed in the volute, forming a negative pressure inside the volute. The fume is sucked into the hood by a strong airflow during the rising process, cooled and separated by the impeller. Over a long period of time, some oil stains will accumulate on the impeller, increasing the weight of the impeller, the speed of rotation will become slower and slower, and the suction will become smaller and smaller.At this time, it is necessary to clean the range hood.According to the use frequency and habits, the general cleaning cycle of Chinese deep type machines is 6-12 months.
