Structural high-efficiency energy-saving non-oil stick cooking fume exhauster

The utility model discloses a structural range hood with high efficiency, energy conservation and no oil stain, comprising a fan, an oil filter, a hood shell, an oil smoke hood, an illuminating lamp and a multi-position key switch, wherein the shell of the fan is in a round double-chamber or multi-chamber structure with an air inlet and an air outlet; and the impeller of the fan comprises at least one group of circular arc shaped passage blades which are sealed at a single side and amplificative in the axial direction. The structural range hood with high efficiency, energy conservation and no oil stain has the main technical target that the efficiency is improved by over 10 percent, the energy is saved by over 10 percent, the noise is not more than 50dB, the sifting rate of oil smoke is over 95 percent, the purifying ratio of the oil smoke is over 90 percent, and the service life is prolonged by over 3 times. And meanwhile, the utility model has the advantages of high efficiency, energy conservation, no oil s