Patent ID: 7875252
Filing Date: 2011-01-25
Classification: B01D,E04D,F21S,F24F,Y02A,Y02B

Abstract:
1. A light-pipe system for conducting/distributing air and light and purifying indoor air in a building, the system comprising a light-pipe device, a ventilation passage and a photocatalyst film, the light-pipe device having: (i) a light collector for collecting sunlight; (ii) a light-pipe tube, and (iii) an emitter fitted to an end of the light-pipe tube for diffusing light, the light-pipe tube and the ventilation passage being disposed coaxially by arranging the passage outside the tube, and air flow being passed through an annular air passage formed between the light-pipe tube and the ventilation passage, the photocatalyst film being coated on the outer surface of the emitter contacting with the indoor air for purifying the indoor air by illumination of the sunlight conducted from the light-pipe tube.