The present invention relates to a built-in damper built-in centrifugal ventilator that is configured to be opened and closed automatically when the centrifugal ventilator operates integrally.;According to the present invention, a suction port 2 is formed at a lower portion thereof, and a housing 6 having a discharge hole 4 formed at a side thereof, and rotatably mounted inside the housing 6, mounted at one side of the housing 6. In the centrifugal ventilator comprising a rotary shaft (8) rotated by the drive motor 14 and a centrifugal fan (22) coupled to the rotary shaft (8) and rotated in accordance with the drive of the drive motor (14), The rotating shaft 8 is formed with a through hole 34 penetrating the inside thereof in the longitudinal direction, the screw shaft 36 is screwed into the through hole 34, and one end of the screw shaft 36 The on-off damper built-in centrifugal ventilator is provided, which is located inside the centrifugal fan 22 and is equipped with an open / close damper 38 that opens and closes the suction port 2 in accordance with the lift.
展开▼
