The invention relates to a self-cleaning range hood. The self-cleaning range hood comprises an outer hood and a fan; the fan comprises a spiral case and an
impeller which is arranged inside the spiralcase; a
volute tongue is arranged on the spiral case; the self-cleaning range hood also comprises a self-cleaning component provided with a
nozzle; an accommodating chamber is formed at the
volute tongue; the
nozzle is arranged inside the accommodating chamber; the sidewall, close to the
impeller, of the
volute tongue is provided with an opening for a washing medium to pass through; and the
nozzle is provided with a spraying opening corresponding to the opening. According to the self-cleaning range hood provided by the invention, the nozzle of the self-cleaning component is arranged in the volute tongue; the pressure of a flow filed at the position of the volute tongue is minimum, and the volute tongue is nearest to blades of the
impeller at a circumference of the overall spiral case, sothe journey of the washing medium after the washing medium is sprayed out is effectively shortened; meanwhile, a pipeline for conveying the washing medium can be conveniently shortened as well; the conveying journey before the washing medium is sprayed out is shortened; therefore
heat energy loss of the washing medium is reduced; a self-cleaning effect is improved; and the spraying opening is formed inside the volute tongue, so the integrity of the structure of a fan
system is guaranteed, and the problems such as noises and
smoke suction efficiency reduction which are caused in a washing process can be prevented.