Range hood, medium height detection method and control method thereof

The invention discloses an extractor hood, a medium height detection method and a medium height control method. The extractor hood comprises an oil collecting assembly, and the oil collecting assembly comprises an oil cup; the oil collecting assembly further comprises a temperature sensing module which is arranged outside the oil cup and can detect the temperature of the oil cup wall face attached to the temperature sensing module or opposite to the temperature sensing module in all positions in the height direction of the oil cup. The range hood further comprises a processor used for calculating the height of different media layered in the oil cup according to the temperature, detected by the temperature sensing module, of all the positions of the wall face of the oil cup, and the media at least comprise one of oil, water and ice. Compared with the prior art, the oil cup has the advantages that water and oil are layered due to different densities and gravity and have different heat exchange coefficients with