Circulating ventilation device for house building

The utility model relates to the technical field of house building ventilation, in particular to a circulating ventilation device for house building, which comprises two air pipes which are communicated with the interior of a plant and are respectively used for air inlet and air outlet, a fan is mounted in each air pipe, and one end, far away from the plant, of each air pipe is bent downwards and is detachably connected with a dust filtering cover; the dust filtering cover is arranged in an inverted-cone shape and seals an opening in the end, away from the workshop, of the air pipe, and a plurality of dust filtering holes communicated with outside air and the interior of the air pipe are formed in the dust filtering cover. The situation that rainwater floats into the building and dust floats out of external air can be reduced. 本申请涉及房建通风的技术领域，尤其是涉及一种用于房建的循环通风装置，其包括两根连通于厂房内部并分别用于进风和出风的风管，风管内安装有风机，风管远离于厂房的一端向下弯折并可拆连接有滤尘罩，滤尘罩呈倒锥形设置并封闭于风管远离于厂房的一端开口，滤尘罩上设有若干连通于外部空气和风管内部的滤尘孔。本申请能够减少雨水飘进建筑内部和灰尘飘出外部空气的情况发生。