Contactless control device for a range hood and control method thereof

A non-contact control device and a control method for a range hood, the non-contact control device comprising two sets of infrared gesture sensing devices (A, B) provided on a housing (6) of the range hood and a detection signal analysis device (3); each set of the infrared gesture sensing devices (A, B) comprises one infrared reception device (1) and at least one infrared transmission device (2); and the distance L between the infrared receiving devices (1) of the two sets of the infrared gesture sensing devices (A, B) satisfies: H * tan(θ) + H * tan(β) + W_min < L < H * tan(θ) + H * tan(β) + W_max. The user gesture sensing distance does not need to be controlled in accordance with the intensity of an infrared transmission signal, which can facilitate the intensity adjustment of the infrared transmission signal, ensuring that the infrared reception device (1) can better detect the infrared signal and gesture operation signals within a maximum sensing distance will not interfere with one another.