Abstract: Taking the current European type flat range hood as an example, a common problem with the range hood in the market is that there is a difference in smoking between the left and right sides of the range hood. Generally speaking (it should be determined according to the internal structure), if the air outlet is on the left, the smoking effect on the left is worse, and if it is on the right, the smoking effect on the right is worse, which is determined by the spiral case structure. In order to solve the market pain point, we are considering to change the smoking structure, adopt double impeller and single motor, and use gear link at the same time, which can not only solve the problem of uneven smoking, but also reduce the escape amount of oil smoke. We use virtual simulation and experimental verification to confirm that we can realize the intelligent interactive device——oil smoke escape recorder. This can solve the market pain points and optimize the internal structure, so as to achieve the optimal output of the whole control system, which greatly reduces the cost compared with double motor and double impeller.

Key words: Single motor, Double blade wheel, Volute structure, Gear connection, Simulation, Control system