▎ 摘　　要

NOVELTY - The utility model relates to the technical field of fresh air system, claims a fan device for fresh air system, comprising a shell; two sides of the bottom end of the shell are provided with a support; the shell between the two struts is provided with an air outlet pipe; the bottom wall of the shell is provided with an isolation plate; the separating plate divides the shell into two filtering cavities and the filtering cavity is connected with the air outlet pipe; the filtering cavity is provided with a filtering mechanism; the upper part of the filtering mechanism is movably connected with a baffle; the inner wall of the shell above the baffle is provided with a fixing frame. The utility model realizes purifying the air through the filtering mechanism; the graphene filter screen uses the graphene absorption of the filter to remove impurities from the air; the graphene impurity removing effect is obvious; the baffle plate is used for opening and closing the two filter cavities so as to continuously purify the gas; at the same time, it is convenient for the graphene filter screen; the active carbon adsorption plate is changed in time; the purifying efficiency of the air is increased.