Ventilation Rouver And Manufacturing Method Of Slat For Ventilation Rouver

摘要

Ventilation louver according to the present invention includes a frame and , at a certain rotation angle is arranged at a predetermined interval in the frame possible, and the upper and lower ends are formed stepped in mutually opposite positions are formed to be provided with a plurality of slats that are connected in contact with each other , the inside of each slat is possible to improve the insulating performance of the ventilation louver with a simple structure by being formed in a vacuum there . ;