VENTILATION SYSTEM MOUNTED

摘要

PURPOSE: A ventilation system is provided to achieve an effective prevention against noxious insects by maintaining the space beneath the floor at dried state and allowing chemicals to be automatically and continuously sprayed. CONSTITUTION: A ventilation system(100) comprises an air blowing chamber which is sectioned into upper and lower portions by a diaphragm(14) having an air flow opening(15); and a chemical chamber arranged in the upper portion of the air blowing chamber and which has a discharge grille arranged at the rear of the chemical chamber and a chemical tray(30) to be received into the chemical chamber. The air blowing chamber includes a pair of suction grilles arranged at the rear surface of the air blowing chamber, blower fans arranged at the inside of the air blowing chamber, and an outlet grille(12) arranged at the front of the chemical chamber so as to be opened/closed by a shutter. The chemical tray is formed of a drawer type, and has holding pieces(31) arranged at constant spacing so as to accommodate a chemical(50) solidified into a thin plate.