Abstract: The air inlet structure of 7-shaped range hood is located on the smoke collecting chamber, which is an important factor affecting the smoking effect. Based on the finite element simulation method, the fluid simulation analysis of different inlet structure schemes of 7-shaped range hood is carried out, and the influence of each structure on the smoking effect is explored. The simulation results show that the smoking effect is the best when there are openings in the upper and middle parts, and the smoking efficiency can reach 97.4% in theory. Only the upper structure with openings had the worst smoking effect, and the smoking efficiency was only 80.3%. And the experimental results are consistent with the simulation results.

Key words: Range hood, Fluid simulation, Smoking effect, Air inlet