Until the Tang Dynasty, folk are represented by mullioned windows. To the Ming Dynasty, lying lattice windows have great development. Made in the Song Dynasty pagoda variety of diverse mullioned windows, also done in the Ming Dynasty pagoda lying lattice windows, instances particularly those blinds is the predecessor. Window frames, no more than several styles, not the bar is vertical bars. The blinds bar that is taking shape. Strictly speaking, lying lattice windows with blinds is a little different, and that is lying lattice windows paracytic and void and transparent. Blinds window frames made oblique lattice, both inside and outside can not see the horizontal direction, and only look at the slope before seen. In ancient times, people do wooden window frames wooden shutters, mainly use it to achieve the purpose of ventilation and air circulation shutters, blinds and nearly blinds generation through various improvements, has set a number of functions in one, for a variety of buildings. Air conditioning grille with a long time wood blinds, there will be dust, debris and other pollution, which affects the use of air conditioning effect. So the air conditioning grille good care will increase its life. General air conditioning grille with horizontal inclination placed into 45 to 60, more effort inclination hour, clean up, but the area is greater. Manual cleaning of air conditioning grille, the design area larger safety factor should be used aluminum blinds, generally not less than the effective area of ??the inlet canal twice, in order to avoid too frequent slag. Special attention should be harmful gases harm to the operator, and shall take effective preventive measures. Longtai metal, aluminum blinds, shutters Yantai provided by longtai metals. Search for "blinds, aluminum air conditioning grilles, pvc fence, antique gazebo, wood flower" fly suppliers, network operators choose to have a full alliance Certified: Linqu longtai Metal Products (www.wfhulan.com), trustworthiness and reliability, now click on the "Business Alliance customer service" on page live chat with us now!