EP1520081A1 - Sun protection device having a plurality of segments that are oriented in parallel to one another - Google Patents
Sun protection device having a plurality of segments that are oriented in parallel to one anotherInfo
- Publication number
- EP1520081A1 EP1520081A1 EP03763799A EP03763799A EP1520081A1 EP 1520081 A1 EP1520081 A1 EP 1520081A1 EP 03763799 A EP03763799 A EP 03763799A EP 03763799 A EP03763799 A EP 03763799A EP 1520081 A1 EP1520081 A1 EP 1520081A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cpcs
- slats
- protection device
- sun protection
- slat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/264—Combinations of lamellar blinds with roller shutters, screen windows, windows, or double panes; Lamellar blinds with special devices
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
Definitions
- Sun protection device with a plurality of oriented parallel to each other
- the invention relates to a sun protection device with a number of slats, which are arranged at a distance from one another parallel to their longitudinal extension and are rotatably mounted about their longitudinal axis and each have a slat top, on which a plurality of optical concentrator structure elements made of at least partially transparent dielectric material, so-called CPCs ( Compound Parabolic Concentrators) is provided, which each have a light incidence and a flat or curved receiver surface and which are oriented with the receiver surface directed towards the top of the slats.
- CPCs Compound Parabolic Concentrators
- a generic device of the above type is disclosed in DE 196 13222 A1, which describes a stationary device for shading the direct sunlight in glazing using light-concentrating structures of the type of CPCs (Compound Parabolic Conentrators).
- the CPCs are used to specifically block out direct sunlight that is directed onto the light-concentrating elements.
- CPCs can light that hits the light incidence surface of a CPC from a certain acceptance angle range in the way of Concentrate total reflection on a receiver area that is smaller in size than the light incidence area.
- the stationary shading system described in the above publication is characterized in that the receiver surface of the CPCs is partially or completely mirrored, as a result of which the light components totally reflected within the CPCs are reflected back into the same angular range from which they hit the CPCs.
- the light components originating from the other solid angle areas and the light components incident on the CPCs pass through the otherwise light-transparent concentrator structures by way of light refraction.
- the CPCs are attached to the top of straight-shaped slats, which are arranged behind a glazing, for example in the form of a slat curtain with a large number of individual slats oriented vertically one above the other, each with a horizontal longitudinal extent.
- the individual slats are rotatably supported around their longitudinal extent in order to be able to dynamically adapt the masking areas specified by the individual CPCs to the current position of the sun.
- the known lamella curtain provided with CPCs and having a plurality of lamellas which are horizontally oriented and vertically spaced apart has a number of disadvantages due to the system.
- Another disruptive optical conspicuity in such a slat curtain is based on the direct illumination of the underside of the slat by light reflection on the top of the slat of the immediately adjacent slat, which is attached vertically below the illuminated underside of the slat.
- Such disturbing reflections on the underside of the slats are particularly evident in cases in which the slats are tilted from a horizontal orientation, for example facing a low position of the sun, whereby the undersides of the individual slats inevitably come into view for an observer inside the room.
- lamella areas can also come into view of a viewer that are directly illuminated by the incident sunlight, which can lead to severe glare.
- the invention has for its object to develop a sun protection device with a number of slats, as described above, such that even wider glazing can be covered by the sun protection device without the effects of deflection of the aforementioned type due to the weight of the individual slats to have to take. Furthermore, the illuminations of the underside of adjacent slats caused by mutual reflection, in particular in cases in which the individual slats are tilted relative to the horizontal, must be avoided or the disruptive effects reduced.
- a sun protection device with a number of lamellae which are spaced apart from one another parallel to their longitudinal extent and are rotatably mounted about their longitudinal axis and each have a lamella top on which a plurality of optical concentrator structure elements made of at least partially transparent dielectric material, so-called CPCs, is provided, which each have a light incidence and a flat or curved receiver surface and which are oriented with the receiver surface in each case directed towards the top of the slats, designed in such a way that the top of the slats is at least partially curved or angularly shaped transverse to its longitudinal extent.
- CPCs optical concentrator structure elements made of at least partially transparent dielectric material
- the top surfaces of the slats are at least partially reflective or opaque, so that it is ensured that the sunlight falling within the acceptance angle range of the CPCs is reflected in the same angular range in the opposite direction.
- the CPCs adjoin the top surface of the slat directly or via at least one adhesion promoter layer or are spaced apart from the top surface of the slat.
- the receiver surfaces are "directly” or indirectly “provided” with reflective properties.
- a separate manufacturing step may be omitted, in which the receiver surfaces must be provided with a reflective coating to ensure the desired function, which can be complex, in particular in the case that the CPCs are designed as a microstructure.
- the curvature or angular design of the top of the slat transversely to its longitudinal extension gives the slat a high degree of inherent stability in the longitudinal extent and, in addition, enables direct irradiation of the underside of the slats by means of appropriate curvature shapes and edge profiles Reduce sunlight reflection on the adjacent tops of the slats zy. Likewise, direct eye contact on directly illuminated tops of slats or undersides illuminated by reflexes can be avoided by a corresponding course of curvature despite inclined slats relative to the horizontal.
- a particular aspect of the sun protection device designed according to the invention relates to the possibility of producing large-area distributed CPC structures in the form of sunlight-transparent films which can only be applied to the top of the slats.
- Such CPC films are produced by means of lithographic process steps, molding processes and embossing processes, which will not be discussed in detail at this point. Rather, it should be mentioned in this context that the CPC structures themselves do not have any flat intrinsic stability and, in combination with a lamella, cannot increase the intrinsic stability of the lamella, or only to a small extent.
- the sun protection device according to the invention also differs from the device described in the publication cited at the beginning, since it provides macroscopic CPCs which, in themselves, could represent a self-supporting CPC arrangement.
- FIGS. 1a and b show cross-sectional representations through a curved (see FIG. 1) and an angularly shaped (see FIG. 1b) lamella L, on the lamella top side LO of which a large number of individual CPCs 1 are arranged ,
- the individual CPCs 1 are arranged next to one another or with invariant translation, which results in a strip-like or array-like arrangement of individual CPCs covering the lamella surface LO, at least in partial areas.
- Both the curved curvature transversely to the longitudinal direction of the lamella L, which is shown in Fig. 1 a, as well as the folded edge introduced longitudinally to the lamella L according to the embodiment in Fig. 1b, increases the longitudinal stability significantly, whereby slats with lengths of several meters can be produced, which can only be attached to the side edges or at a few stopping points without any signs of deflection.
- FIG. 2 shows a schematic cross section through a CPC structure known per se, which has a light incidence surface LE and a receiver surface EF.
- the light incidence surface LE and the receiver surface EF are connected by parabolic side surfaces SE, at the interface of which light rays that fall on the light incidence surface LE within the acceptance angle range are totally reflected and concentrated on the receiver surface EF.
- the dashed line below the receiver area EF is only intended to clarify that the receiver area EF does not have to be designed exclusively as a flat area, but definitely also, e.g. can take on a continuously curved surface shape.
- the receiver surface EF is covered with a reflective layer or is at least arranged close to the reflective top surface of the lamella, on which the light rays are reflected accordingly , So is ensures that the sunlight falling within the acceptance angle range is reflected back into this area.
- the flat arrangement of the CPC structures can be formed as light-transparent foils by means of lithographic processes and subsequent molding and embossing processes and can be added to the correspondingly curved top side of the lamella L.
- FIG. 3a provides the arrangement of identical CPCs 1 which, with regard to their individual acceptance angle ranges, which are represented in the drawing by the respective central direction A, are attached to the lamella surface as a function of the local curvature behavior.
- the individual acceptance angle ranges of the individual CPCs thus point in different spatial directions.
- FIG. 3b shows a group of CPCs 1, the spatial orientation of the individual acceptance angle regions A of which are aligned coparallel.
- the individual CPCs are identical to one another, but have different inclinations with respect to the top side of the slats LO.
- the light incidence surfaces LE of the individual CPCs 1 are not in a common surface O. Rather, the latter property is reflected in the exemplary embodiment according to FIG. 3c, in which the individual CPCs are spatially identically oriented with respect to their individual acceptance angle ranges and also describe a common surface O with their individual light incidence surfaces LF.
- a surface O which is preferably smooth, and which is also coparallel to the top side of the lamella LO of the lamella L, is far less sensitive to dirt than the exemplary embodiment shown in FIG. 3b.
- FIG. 3d shows a lamella top side LO, on which CPCs are arranged in two groups G1 and G2.
- Group G1 is composed of CPCs 1, the spatial orientation of their acceptance angle ranges depends on the local curvature behavior of the top of the slats.
- the group G2 provides CPC elements whose spatial alignment of their acceptance angle ranges are oriented in the same way.
- the exemplary embodiment makes it clear that any variations and combinations of the above-mentioned possible CPC configurations are possible with reference to FIGS. 3a to c on a single lamella surface depending on the lighting situation.
- FIG. 4 shows a detailed representation of three CPC structures 1 applied on the top of a lamella, the acceptance angle ranges ⁇ - ⁇ , ⁇ 2 and ⁇ 3 of which are selected such that they overlap. This ensures that sunlight from an incident direction in the overlap area is reflected back by all CPCs in the group by total reflection and reflection on the top of the slats. The arrangement can therefore be direct sunlight entirely reflect when the lamella (and thus the group) as a whole is oriented so that the sun is in the overlap angle range.
- the detail representation in FIG. 4 likewise clarifies that the top of the slat LO is at least partially reflective or opaque, so that the slat designed according to the invention cannot be penetrated by diffuse sky radiation.
- the sun protection device provides a plurality of horizontally aligned individual lamellae L arranged parallel to one another, which are arranged vertically one above the other.
- all the slats L have an identical inclination with respect to their longitudinal axes. This situation is outlined in the cross-sectional representation according to FIG. 5a. It is also conceivable to combine groups of individual slats within such a slat curtain, which have the same inclinations with each other, but different cross-inclinations with respect to different groups. This situation is shown in Fig. 5b, in which the upper three slats have a flatter inclination than the lower three slats.
- the CPCs 1 are arranged in the region of the longitudinal edge of the slats L facing the solar radiation in such a way that the sunlight incident on the CPCs is essentially retroreflected, in the sense of a back reflection in the solid angle range from which the light falls on the CPCs.
- the CPCs which are arranged in the longitudinal edges facing away from the solar radiation, face in the direction of the vertically adjacent underside of the slats.
- the advantageously curved slat covers the directly illuminated areas LB of the underside of the slat LU. To further Avoid overexposure on the underside of the lameia
- a light-transparent adhesion promoter for example an adhesive layer on the top of the slats.
- the CPCs are attached to the slat surface, for example, via the edge areas of the CPCs with the slat appropriate clamp or adhesive connections.
- direct optical contact can be made using suitable transparent adhesive layers or not.
- a further advantageous embodiment results if a bonding agent used is not transparent, but is itself reflective (white or reflective). Then the adhesion promoter takes over the mirroring of the receiver surfaces and the properties of the lamella surface LO are only secondary or only significantly responsible for the reflection of diffuse sky light that falls outside the acceptance ranges. In this case, the lamella surface can even be designed specifically according to the requirements of diffuse light reflection without impairing the retroreflective property of the lamella for direct sunlight.
- the sun protection device designed according to the invention is suitable as a slatted curtain LBH, which can be introduced into the intermediate space of a multi-pane glazing M (see schematic diagram according to FIG. 7).
- CPC structures ideally have a parabolic lateral boundary surface, each of which is connected to the light incidence surface via a peripheral edge.
- the boundary surface cannot assume the ideal and theoretically exact parabolic shape due to manufacturing-related manufacturing tolerances, but rather deviates from the ideal shape.
- the optical function and the general shape of the CPC structure are largely retained, such deviations should also be included in the technical teaching disclosed in this document.
- G1 G2 groups of CPCs ⁇ 1, ⁇ 2, 3 acceptance angle ranges
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Optical Elements Other Than Lenses (AREA)
- Blinds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10231139A DE10231139C1 (en) | 2002-07-10 | 2002-07-10 | Sun blind with parallel slats, between double glazing glass panes, has compound parabolic concentrators fitted to the slat upper surfaces to reflect incoming light and give shade behind them |
DE10231139 | 2002-07-10 | ||
PCT/EP2003/007499 WO2004007889A1 (en) | 2002-07-10 | 2003-07-10 | Sun protection device having a plurality of segments that are oriented in parallel to one another |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1520081A1 true EP1520081A1 (en) | 2005-04-06 |
Family
ID=28051348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03763799A Withdrawn EP1520081A1 (en) | 2002-07-10 | 2003-07-10 | Sun protection device having a plurality of segments that are oriented in parallel to one another |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060109555A1 (en) |
EP (1) | EP1520081A1 (en) |
DE (1) | DE10231139C1 (en) |
WO (1) | WO2004007889A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2474427A (en) * | 2009-10-13 | 2011-04-20 | Levolux At Ltd | Exterior solar shading louvre with light redirection and infra-red filter |
CA2856486A1 (en) * | 2011-11-24 | 2013-05-30 | The University Of British Columbia | Adjustable transmissive insulative array of vanes, system and building structure |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511755A (en) * | 1982-05-17 | 1985-04-16 | Kei Mori | Solar ray collection apparatus |
US4475536A (en) * | 1983-02-09 | 1984-10-09 | Mega Engineering | Solar collector-skylight assembly |
US4773733A (en) * | 1987-11-05 | 1988-09-27 | John A. Murphy, Jr. | Venetian blind having prismatic reflective slats |
DE29601308U1 (en) * | 1996-01-26 | 1996-04-11 | Federmann, Helmut, Dr., 51427 Bergisch Gladbach | Device for supplying a room with glare-free, diffuse sunlight |
DE19613222A1 (en) * | 1996-04-02 | 1997-10-09 | Fraunhofer Ges Forschung | Stationary device for shading the direct sunlight from glazing |
DE10053095A1 (en) * | 2000-10-26 | 2002-05-16 | Fraunhofer Ges Forschung | Device for redirecting and blanking light for stationary use in a translucent building facade for targeted lighting of an interior |
SE0201229D0 (en) * | 2002-04-24 | 2002-04-24 | Sandarna Parts Ab | Day Lighting Device |
-
2002
- 2002-07-10 DE DE10231139A patent/DE10231139C1/en not_active Expired - Fee Related
-
2003
- 2003-07-10 WO PCT/EP2003/007499 patent/WO2004007889A1/en not_active Application Discontinuation
- 2003-07-10 US US10/520,632 patent/US20060109555A1/en not_active Abandoned
- 2003-07-10 EP EP03763799A patent/EP1520081A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2004007889A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004007889A1 (en) | 2004-01-22 |
US20060109555A1 (en) | 2006-05-25 |
DE10231139C1 (en) | 2003-10-16 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20041209 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BLAESI, BENEDIKT Inventor name: BUEHLER, CHRISTOPHER Inventor name: WITTWER, VOLKER Inventor name: NITZ, PETER Inventor name: GOMBERT, ANDREAS Inventor name: KUHN, TILMANN Inventor name: PLATZER, WERNER |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20070605 |