WAFTER DEVICE FOR NATURAL VENTILATION UNIT

摘要

PURPOSE: A control vane structure of a natural ventilation type unit is provided to block unintended inflow of exterior air as implementing a ventilating function and reinforce the airtight seal by a packing. CONSTITUTION: A control vane structure of a natural ventilation type unit comprises a control vane(20) which is installed in the middle of a profile main body(12,14) in order to contact the top and bottom of a control vane(16). The control vane is formed of a resin material having two or more properties. The control vane includes a rotating unit(31) of hard material which is provided on the portion in contact with the outer profile, a moving body unit(35) of hard material which has an internal cavity(36) and is provided on the portion in contact with the top and bottom of a packing, and a sealing unit(50) of soft material which is provided on the portion in contact with the packing to enhance the airtight seal.