Daylighting panel

Patent metadata

Field	Value
Publication number	US-10794557-B2
Application number	US-201716346606-A
Country	US
Kind code	B2
Filing date	Nov 2, 2017
Priority date	Nov 3, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A daylighting panel for integration into a building or larger vehicle comprises a translucent facade element (800) containing a glass sheet and a light transport channel (801) for guiding light about horizontally into an interior of the building, the light transport channel comprising one opening attached to the interior side of said facade element and at least one opening towards the interior of the building equipped with a luminaire (807), characterised in that the inner walls including the rear end are covered by a reflecting layer (808).

First claim

The invention claimed is:

1. Daylight illumination system comprising a light transport tube ( 801 ) for horizontal integration into a building or vehicle, the light transport tube having a front end and a rear end, wherein the rear end is sealed, the inner walls including the rear end are equipped with a reflecting layer ( 808 ), and a side wall contains one or more openings each of which is sealed with a luminaire ( 807 ),
characterized in that the reflecting layer ( 808 ) provides a reflectivity, averaged over all angles of incidence, polarizations and wavelengths from the visible range, of 96.5% or more, and the open front end is suitable for attaching to the inner side of a flat transparent facade element ( 800 ) of the building or wall element of the vehicle while in a horizontal position, or the front end is sealed to a transparent front plate ( 800 ) configured for integration into the building's façade or vehicle wall without protruding outwardly from the building's façade or vehicle wall and wherein the flat transparent façade element or wall element or front plate is oriented essentially parallel to the façade or wall.

2. Daylight illumination system of claim 1 wherein the light transport tube ( 801 ) is for horizontal integration into a building, wherein the open front end is suitable for attaching to the inner side of a flat
and transparent facade element ( 800 ) of the building, or the front end is sealed to a transparent front plate ( 800 ) suitable for integration into the building's facade.

3. Daylight illumination system according to claim 2 , wherein the transparent facade element ( 800 ) comprises an insulating glazing unit containing at least 2 parallel glass sheets and at least one polymer film, wherein the total thickness of the facade element ( 800 ) is from the range 10 to 1000 mm.

4. Daylight illumination system of claim 3 , wherein the total thickness is from the range 15-250 mm.

5. Daylight illumination system of claim 1 , wherein the front end and the one or more openings sealed with a luminaire ( 807 ) in the light transport tube ( 801 ) are arranged in a way that the cross-sectional area of the front end suitable for sealing, or sealed, to the front plate ( 800 ), and the cross-sectional area of the one or more openings sealed with a luminaire ( 807 ), form about a right angle.

6. Daylight illumination system of claim 1 , wherein the reflecting layer ( 808 ) provides a reflectivity, averaged over all angles of incidence, polarizations and wavelengths from the visible range, of 97% or more.

7. Daylight illumination system of claim 6 , wherein the reflectivity is 97.5% or more.

8. Daylight illumination system of claim 7 , wherein the reflectivity is 98% or more.

9. Daylight illumination system of claim 1 , wherein the light guiding inner walls of the light transport tube ( 801 ) are covered by a reflective silver or aluminum layer or a reflective multilayer polymer film providing at least 95% directed reflection and less than 5% diffuse reflection.

10. Daylight illumination system according to claim 1 , wherein the reflecting layer used in the present light transport tube provides reflectivity with low color shift characterized by a Fidelity Index Rf of 90 or more, and a Gamut Index Rg from the range 95 to 105 in accordance with IES TM-30-15.

11. Daylight illumination system according to claim 1 , wherein the cross section of the light transport tube ( 801 ) has a height from the range 8 to 50 cm; has a width from the range 20 to 300 cm; and the length of the light transport tube ( 801 ) is from the range 500 to 2000 cm.

12. Daylight illumination system according to claim 11 , wherein the light transport tube ( 801 ) has a rectangular cross section, and a height of about 30 cm and a width of about 90 cm.

13. Method for improving the light quality in a building or vehicle by increasing the amount of daylight brought into the building or vehicle, characterized in that a daylight illumination system according to claim 1 is integrated into an envelope of the building or vehicle wall; providing a reflecting film providing a reflectivity, averaged over all angles of incidence, polarizations and wavelengths from the visible range, of 96.5% or more, for lining the inner walls of light transport tube ( 801 ) having a length of 5 to 20 meter, which light transport tube is suitable for horizontal integration into a building or vehicle and wherein the cross section of the light transport tube has a height from the range 8 to 50 cm; has a width from the range 20 to 300 cm; and the length of the light transport channel tube is from the range 500 to 2000 cm.

14. The method of claim 13 , wherein the reflectivity is 97% or more, and the length is 6 to 12 meter.

15. The use of claim 14 , wherein the reflectivity is 97.5% or more.

16. Daylight illumination system of claim 11 , wherein the height is from the range 10 to 35 cm, the width is from the range 30 to 120 cm, and the length is from the range 600 to 1200 cm.

17. Daylight illumination system according to claim 1 , wherein the cross section of the light transport tube ( 801 ) is rectangular or circular or triangular or pentagonal or hexagonal.

18. Daylight illumination system of claim 17 , wherein the light transport tube ( 801 ) has a rear end which is slanted downwards.

19. Daylight illumination system according to claim 1 further comprising an artificial light source.

20. Daylight illumination system of claim 19 , wherein the light source is a LED light source.

21. Building or vehicle comprising
a daylight illumination system according to claim 1 , characterized in that an envelope of the building's with its facade comprises the attached light transport tube ( 801 ) integrated as a facade element, or
the vehicle's outer wall comprises a translucent or transparent wall element, to which the present light transport channel's front end is attached in about horizontal positioning and its rear end reaches towards the vehicle's interior.

22. Method for improving the light quality in a building or vehicle by increasing the amount of daylight brought into the building or vehicle, characterized in that a daylight illumination system according to claim 1 is integrated into an envelope of the building or vehicle wall introducing daylight into the interior of the building or vehicle in 5 to 20 meter distance from a window.

23. The method of claim 22 , wherein the distance is 6 to 12 meter.

24. Method for improving the light quality in a building or vehicle by increasing the amount of daylight brought into the building or vehicle, characterized in that a daylight illumination system according to claim 1 is integrated into the building envelope or vehicle wall, with its light transport channel aligned about horizontally away from the building's facade or outside wall of the vehicle without protruding outwardly from the building's façade or vehicle wall and wherein the flat transparent façade element or wall element or front plate is oriented essentially parallel to the façade or wall.

Assignees

• Basf Se

Inventors

• Garrido Segura Cristobal
• Hintermann Tobias
• Kostro Andre
• Vetter Tatjana

Classifications

• F21S11/00

  Non-electric lighting devices or systems using daylight {(hybrid lighting devices combining artificial and natural light F21S19/00; roofs with sky-light opening E04D13/03; sun blinds for windows with means for redirecting light onto ceiling of a room E06B9/00; solar heat collectors F24S)} · CPC title

• E04D3/06

  of glass or other translucent material; Fixing means therefor (fixing glass panes by means applicable to windows E06B3/54) · CPC title

• G02B6/0066

  characterised by the light source being coupled to the light guide · CPC title

• F21S11/007

  characterised by the means for transmitting light into the interior of a building · CPC title

• G02B6/0095

  Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like · CPC title