| 摘要 |
PURPOSE: A natural ventilation system using a window is provided to reduce noise caused by a flap shaken by a draft and to easily control the position of the flap. CONSTITUTION: A natural ventilation system(10) using a window comprises upper and lower frames(20,30), side frames(40), a flap(50), a flap opening and closing unit(60), a rotation position fixing unit(70), and a grill unit(80). The upper and lower frames form a ventilation passage(11) between the upper and lower frames. The side frames are installed on both sides of the upper and lower frames and have shield units(45). The flap is rotatably installed on the upper frame and opens and closes the ventilation passage. A sealing member is formed on the bottom end of the flap. The flap opening and closing unit is installed on one side frame and opens and closes the flap. The rotation position fixing unit fixes the opened position of the flap. The grill unit is installed in the outlet of the ventilation passage. |
