| 摘要 |
PURPOSE:To facilitate the attachment of the main body of the ventilating fan and to make it possible to adjust the amount of natural ventilation, by providing the main body of the fan outdoors, communicating the main body to the inside of the room through a forced ventilating path and a natural ventilating path, and making it possible to open and close the shutter of the natural ventilating path. CONSTITUTION:When a ventilating fan switch is turned ON in ventilating the room, blades 4 are revolved by a motor 5, the room air, which is supplied from a room air supply port 13, is exhausted to the outside of the room from an air exhaust port 19 on the outdoor side through air exhausting paths 2 and 2'. At this time, when a knob 17 is operated, and an opening 18 of a rotary shutter 16 is aligned with an air supply port 14 in the inside of the room of a louver 12, the outdoor air is introduced into the room from the air supply port 14 through an outdoor air supply port 20 and air supply paths 3 and 3'. Meanwhile, when the opening 18 of the rotary shutter 16 is shifted from the air supply port 14, the air supply path is closed, and the intrusion of the outdoor air into the inside of the room is prevented. |
