Fan-type purification device to repel and exclude a harmful or harmful insect, in which an active component is effective to act as an insecticide or acaricide or to control growth, or to hinder a hematophage, sting or feeding behavior of the insect , or to repel the insect, or effective to prevent any other damage due to the insect, the apparatus having a fan-type blower (11) driven by a motor (14), and a mass or a body impregnated with active component (23) adapted to retain and release said active component by volatilization, in which said mass or body impregnated with active component (23) is disposed on a wind inlet side of said fan type blower (11), characterized in that said active component contains as the main component at least one chemical having a vapor pressure of not less than 1.0 x 10-4 mmHg at a temperature of 30 ° C, and said mass or body im Active component (23) is designed to provide a resistance to wind force R which in terms of the proportion of current consumption E2 by said motor (14) in the presence of said mass or body impregnated with active component (23) with respect to the current consumption E1 by said motor (14) in the absence of said mass or body impregnated with active component (23), it ranges between 5 and 25% where R is expressed by the equation: R>； = 100 - E2 / E1 x 100.Aparato de depuración de tipo ventilador para repeler y excluir un insecto dañino o nocivo, en el que un componente activo es eficaz para actuar como insecticida o acaricida o para controlar el crecimiento, o para dificultar un comportamiento de hematofagia, picadura o alimentación, del insecto, o para repeler el insecto, o eficaz para impedir cualquier otro daño debido al insecto, teniendo el aparato un soplador de tipo ventilador (11) accionado por un motor (14), y una masa o un cuerpo impregnado con componente activo (23) adaptado para retener y liberar mediante volatilización dicho componente activo, en el que dicha masa o cuerpo impregnado con componente ac
