| 摘要 |
The present invention relates to a damper for a rotary opening type blower comprising: a cylindrical or a polygonal body including an air vent on a center, and joined to an inlet of the blower; a motor joined to a screw coupling port formed on an outer side of the body by a coupler; the air vent punched on the center of the body; a shaft coupling protrusion protruding inwards from an opposite side of the air vent; a motor shaft protruded inside of the body through the air vent; a cylindrical or a polygonal gasket joined by fitting a shaft into the motor shaft and the shaft coupling protrusion; and at least one preventing protrusion protruding to the inner surface of the body, extended to reach a vane of the gasket, enabling the gasket to be stood perpendicular. The present invention is capable of preventing an intake of external air by blocking a gap between the lower end of the vane and the body, and a gap between the shaft and the body with sealing vanes formed on the lower end of the vane and an outer circumference of the shaft when the gasket is closed while preventing influences to a window flow from the blower by forming the body capable of being freely joined to an existing blower; and forming a curved sealing protrusion and the gasket on the body. More specifically, the flexible sealing vane covered around the hard vane is necessarily bent when reaching a floor such that damage to the sealing vane is inevitable. The present invention extends the preventing protrusion protruding from the inner surface of the body to the flexible vane to make the prevention protrusion support the vane; thereby preventing damage to the sealing vane. |
