The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2011
Filed:
Dec. 06, 2004
Chongfang MA, Beijing, CN;
Yuanwei LU, Beijing, CN;
Yanpeng Wu, Beijing, CN;
Yuting Wu, Beijing, CN;
Wei Wang, Beijing, CN;
Chongfang Ma, Beijing, CN;
Yuanwei Lu, Beijing, CN;
Yanpeng Wu, Beijing, CN;
Yuting Wu, Beijing, CN;
Wei Wang, Beijing, CN;
Abstract
The invention relates to a light-pipe system for conducting/distributing light and air, which can also purify indoor air, particularly in a building, or the like. The light-pipe system includes a light-pipe for conducting light and having a clear top dome mounted at the top of the light-pipe to let in sunlight but keep out dust, rain and UV. An emitter fitted to the bottom of light-pipe improves the light distribution into the room, and a ventilation stack laid around the light-pipe coaxially/or non-coaxially, and a photocatalyst film (e.g. Nanometer TiO2) coated on the outer surface of the emitter for purifying indoor air under the illumination of light from light-pipe. The air and light are conducted separately along two different transport paths. The light-pipe system can provide illumination, ventilation and air purification simultaneously. The light source may be daylight, artificial light, light storage material or a mixture of them. Air can be moved naturally and/or is transported mechanically. Mirrors in the light-pipe may be used to control brightness and distribution.