SUN PROTECTION AND LIGHT-DEFLECTING LOUVERS FOR GUIDING ZENITH RADIATION INWARD

摘要

The invention relates to light guiding louvers with asymmetrical louvers' cross sections for deflecting light with a V-shaped folded structure. The individual folds are made of at least two folded sides b₁ and b₂, b₃ and b₄ with at least light reflective, shiny metallic tops. Between the louvers a shadow line S results in. The light guiding louvers consist of at least two louver part-pieces 10, 11, 40, 41, a first section 11, 41 results in with light deflection essentially back into the half-space I, which lies opposite the light incident side and a second section 10, 40 with light deflection essentially in the half-space A of the incident light. The sum of folded sides∑b₄ of the folds W₁₄ to W₁₆, W₃₃, W₃₄ in the first section 11, 41 is larger and the sum of the angled folded sides∑b₃ is smaller. The sum of the folded sides ∑b₄, divided by the sum of the angled folded sides∑b3 in the first section 11, 41, is larger than the sum of the folded sides∑b₁, divided by the sum of the angled folded sides∑b₂ and is likewise larger than the sum of the folded sides∑b₂, divided by the sum of the folded sides∑bi in the second louvers' section 10, 40. The sum of the width of folded sides∑b₁,∑b₄ divided by the number of folds n within equal size of sections of profile cross-sections, each in the same distance from the louver centre 29 is larger in the first section 11, 41 and smaller in the second section 10, 40 (∑b₄ / n ∑b₁ / n).