IRREVERSIBLE DAMPER FOR NATURAL VENTILATION CAPABLE OF PREVENTING THE BLOCKING OF FORWARD AIR FLOW IN SPITE OF THE NATURAL VENTILATION

摘要

PURPOSE: An irreversible damper for natural ventilation is provided to properly operate with a propeller in spite of the natural ventilation having low pneumatic pressure or low face velocity.;CONSTITUTION: An irreversible damper for natural ventilation comprises a body (3), a flip shaft (4), a flip (2), a propeller (5), a connection shaft (6), a gear (7), and a spring (8). The body is an empty cylindrical shape. The flip shaft crosses the center of the cross section of the body in an internal space of the body. The flip rotates on the flip shaft at a predetermined angle. The propeller rotates in a clockwise or counterclockwise direction according to the directions of wind passing through the internal space of the body. The connection shaft rotates in the clockwise or counterclockwise direction according to the rotation of the propeller. The gear rotates the flip at a predetermined angle according to the rotation of the connection shaft. The spring prevents the flip from being completely closed.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Outside of a cabin; (BB) Inside of the cabin; (CC) Reverse direction; (DD) Forward direction