Sunlight transmission device for illuminating underground building

Abstract

The invention discloses a sunlight transmission device for illuminating an underground building, and the sunlight transmission device comprises a folding surface type collecting mirror and a parabolic cylinder curved surface dimming mirror which are fixedly connected with an optical axis, wherein the folding surface type collecting mirror and the parabolic cylinder curved surface dimming mirror are provided with the same focal point and are respectively located at two sides of the focal point; the folding surface type collecting mirror faces to the sun; and parallel sunlights reflected by the parabolic cylinder curved surface dimming mirror are reflected to a light transmitting barrel at the top of the underground building through a curved surface light-guiding mirror. Compared with the condition that the existing illumination of an underground garage is directly carried out by a light collecting barrel, the brightness of the sunlight collected by a light collecting system is obviously enhanced; and the sunlight transmission device directly realizes the transmission illumination by a reflection manner so that the cost is greatly reduced compared with the optical fiber transmission illumination.

Description

technical field [0001] The invention belongs to the technical field of solar lighting devices, and relates to a solar light conducting device used for underground building lighting. Background technique [0002] Today, when protecting the land, underground buildings are becoming more and more common, especially underground garages are becoming more and more common. For the underground garage, the lighting cost after putting into normal operation accounts for about 20% of the use cost. Therefore, no matter in terms of energy saving and emission reduction, or in order to reduce the cost of use, it is an ideal solution to directly use sunlight for daytime lighting according to its architectural characteristics, and in general, underground garages are built in open spaces. Below, there are usually green areas on the ground, which creates conditions for the design and installation of direct sunlight lighting systems. [0003] However, at present, the light pipe used for solar l...

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Problems solved by technology

[0003] However, at present, the light pipe used for solar lighting in the underground garage only directly transmits the sunlight with the same cross-sectional area as the light pipe to the underground garage for illumination in the form of transmission and scattering, and its brightness and effect are far from meeting the actual needs. As for the daytime, it is generally still equipped with an appropriate number of lights as supplementary light sources to meet the basic brightness requirements.

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