Range hood and maintenance detection method and control method thereof

The invention discloses an extractor hood and a maintenance detection method and control method thereof, the extractor hood comprises a centrifugal fan, the centrifugal fan comprises a volute and an impeller arranged in the volute, and the impeller comprises blades; the range hood further comprises a detection module capable of detecting the temperature of the blades in the circumferential direction of the impeller so as to judge the oil stain accumulation condition of the blades. Compared with the prior art, the invention has the following advantages: because the blade body material such as a galvanized sheet has a large specific heat capacity difference with the oil stain adhered to the galvanized sheet, the characteristic can be utilized to judge the oil stain contamination difference at different positions according to the fluctuation degree of temperature drop at different positions, thereby improving the detection accuracy; further, the oil pollution condition and the dynamic balance damage condition ar