Temporary exhaust combined system

The utility model discloses a temporary exhaust combination system which is installed at a reserved hole of a basement, the temporary exhaust combination system comprises an exhaust fan which blows air vertically and upwards and a ventilation pipe bag which is vertically arranged, the exhaust fan is fixed on the ground under the reserved hole through a steel pipe frame, and the ventilation pipe bag is connected with the exhaust fan. The bottom of the ventilation pipe bag completely wraps the exhaust fan, and the top of the ventilation pipe bag extends to the reserved hole to be communicated with external air. According to the temporary air exhaust combined system, air suction and exhaust at the reserved opening of the basement are achieved, air circulation flow inside and outside the basement can be achieved in cooperation with the air blowers arranged along the inner edge of the basement at intervals, and the forced ventilation and dehumidification effect is achieved. 本实用新型公开了一种临时排风组合系统，安装在地下室的预留洞口处，所述临时排风组合