Improved evaporator of the type comprising a housing that supports the rest of the elements, among which an electrical circuit, a heater and a substance container that incorporates an impregnated wick being the upper end of such an impregnated wick associated with the heater characterized in that the chimney (6) extends from the top of the dome (5) towards the sides of the casing, comprises a series of holes (7) and presents a series of baffles (8) associated with such holes. (Machine-translation by Google Translate, not legally binding)1. Evaporador mejorado del tipo de los que comprenden una carcasa que da soporte al resto de elementos entre los que se comprenden un circuito eléctrico, un calefactor y un contenedor de sustancias que incorpora una mecha impregnada estando el extremo superior de tal mecha impregnada asociado al calefactor caracterizado porque la chimenea (6) se extiende desde la parte superior de la cúpula (5) hacia los laterales de la carcasa, comprende una serie de orificios (7) y presenta una serie de deflectores (8) asociados a tales orificios.