| 摘要 |
<p>An objective of the present invention is to provide a bubble tight damper with improved durability. According to the present invention, a bubble tight damper with improved durability includes a duct having a circular hollow portion vertically penetrated inside; a shaft crossing the center of the hollow portion of the duct, and installed in the duct to be rotatable; a shaft operation unit transferring rotary power to the shaft; and a damper unit including a disk coupled to the shaft, and a sealing member coupled along the outer circumference of the disk, and opening and closing the hollow portion of the duct, wherein the sealing member in the damper unit is formed of a mounting unit with the disk; a ring-shaped sealing body connected to the mounting unit, and closely pressed toward the inner circumferential surface of the hollow portion when the hollow portion of the duct is sealed; and a hollow air room formed along the longitudinal direction of the sealing body inside the sealing body.</p> |
