DE10127982A1 - Retroreflective daylight system with glass tubes has at least two glass tubes arranged horizontally and one above the other or vertically and adjacent to each other - Google Patents

Abstract

The system has at least two glass tubes arranged horizontally and one above the other or vertically and adjacent to each other. The glass tubes are partly or fully mirrored along their longitudinal axes and are rotatably mounted. The glass tubes can be arranged between panels and can be arraigned indoors behind the glazing.

Description

The use of daylight is becoming increasingly important in architecture. Next economic aspects of daylight use can also be proven to promote performance Factors in the use of daylight systems in workplaces are becoming increasingly interesting.

However, the use of daylight also has undesirable effects. Thats how it is suppost to be protect human eyes from excessive lighting. Even with the Warming associated with solar radiation is sometimes undesirable in the summer months. Retroreflective daylight systems allow daylight to be used simultaneous minimization of the glare and heating components.

Venetian blind systems that have been common on the market up to now absorb a large part of solar radiation and then emit the energy as boring radiation. Because of the Transmission spectrum of glass, however, the boring radiation is then from the Window panes no longer directed outside ("greenhouse effect"). Due to the low Reflectance of conventional blind systems is still not effective light control. Blind systems located in the space between the panes also have a low level Reflectance and thus lead to high heating in the space between the panes. The Heat is then also released to the inside of the room and thus also leads to Space heating. Blind systems located in the space between the panes must also be included high effort to be sealed to a condensate-free space between panes guarantee.

Further fundamental disadvantages of all blind systems are the strong darkening in the Space and the loss of reference to the outside world when the blinds are closed.

Some available sun protection systems also have a higher reflectance. For this Systems, however, require expensive manufacturing processes. Furthermore is a targeted Light control in the interior is not possible.

The invention has for its object to provide a daylight system with which one maximum possible reflection of the sun's radiation as well as good room illumination can be. The system should be adjustable so that the user can choose between high Reflection and strong light control can choose any settings. In the highest state Reflection should still allow enough light to enter the room, working inside the room but should be possible without glare. To direct the light, the system should be adjustable in such a way that the best possible room lighting can be set.

The system should be suitable for installation in the space between the panes. In addition, the width widths of the system for the space between the panes of insulating glass exceed. Climatic movements of the insulating glass panes must not be impeded to ensure both the functioning of the system and damage  to avoid the insulating glass. Materials are to be used in the space between the panes used with the materials used in the production of insulating glass Enter into interactions. Procedures should be used to adjust the system, with which a condensate-free space between the panes can be guaranteed.

This object is achieved according to the invention with those specified in the claim Features.

version Description

Embodiments of the invention are shown in the drawings and are in Described in more detail below.

Show it:

Fig. 1 is a perspective view of a mirrored glass tube,

Fig. 2 System example,

Fig. 3 system in sunscreen position,

Fig. 4 system in the light control position.

In the retroreflective daylight system according to the invention, partial mirroring ( 2 ) is applied to one or more glass tubes ( 1 ) in the direction of the cylinder axis and covers approximately 90 ° to 180 ° of the outer circumference of the glass tube. The mirroring takes place, for example, by aluminum vapor deposition in high vacuum vapor deposition systems. The mirrored glass tubes are arranged horizontally or vertically one above the other or next to each other in such a way that only a narrow gap remains open between the individual tubes. The glass tubes are preferably arranged horizontally, since only with a horizontal arrangement is it possible to reflect sunlight for the purpose of directing light onto the ceiling or into the depth of the interior. The entire transmitted light area (generally glass surface, e.g. windows) can be covered with the glass tubes. Use in the roof area (light strips, skylights) is also possible.

The daylight system is preferably installed in the space between the panes, as with Use outside the building requires a lot of effort to get the systems to make it weatherproof. When used inside the building, the Efficiency in the sun protection position (since 2 glass panes part of the radiation absorb) and the systems must be able to be cleaned.

With an integration in the space between the panes, both the energy supply and also possibly necessary control and regulation information in the space between the panes brought that no moisture can get into the space between the panes. To the system To be able to integrate into the space between the panes, the system width may be the standard on the market Do not exceed the widths for the spaces between the panes of insulating glass. The width should therefore for example not exceed 27 mm. In order to "pump" the overall width To allow discs due to climatic pressure differences, the Do not exceed the glass tube outer diameter, for example, 20 mm. If the Panes on the daylight system pose both a risk of damage to the system as well also increased risk of glass breakage.

The individual tubes are accommodated on both sides in a peripheral frame ( 3 ) made of plastic or metal profiles. The individual glass tubes are connected in the edge area of the frame system with a mechanism that enables the tubes to rotate. The drive can be mechanical, electrical, hydraulic or pneumatic. One side of the glass tube is firmly connected to the mechanics ( 4 ), the second side is designed as a floating bearing ( 5 ), so that thermal expansion of the glass tube can be compensated.

The simplest embodiment is a system that is driven by an electric motor ( 6 ). The drive as well as the control can then take place via cables that are brought into the insulating glazing by grinding glass and are also sealed when the panes are sealed with Thiokol or silicone (similar to the usual connection of an alarm spider in the space between the panes). The glass tubes are attached to axles of gear wheels ( 7 ). An intermediate gear ( 8 ) is mounted between the gears with the glass tubes in order to keep the tubes rotating in the same direction.

The mirrored surface can be positioned directly facing the sun ( 9 ) by the described rotary movement. The applied mirroring then causes the sun's rays to reflect. Depending on the degree of reflection of the mirroring, the largest part of the light radiation can be reflected directly to the outside without being converted into heat radiation. On the one hand, this leads to glare protection in the interior and further reduces the warming of the room, which is undesirable in summer.

If the mirrored surface is brought downwards or also towards the interior by the rotary movement ( 10 ), the sun's rays are refracted towards the mirrored surface. The reflected rays are then directed further inwards. Depending on the positioning of the mirror surface, the rays are directed more towards the ceiling or further into the room.

Claims (6)

1. Retroreflective daylight system, characterized in that at least two glass tubes are arranged horizontally one above the other or vertically next to one another. 2. Retroreflective daylight system according to claim 1, characterized in that the Glass tubes are partially or completely mirrored in the direction of their longitudinal axis. 3. retroreflective daylight system according to claim 1 or 2, characterized in that the glass tubes are rotatably mounted. 4. Retroreflective daylight system according to one of claims 1-3, characterized characterized in that the glass tubes are arranged between panes. 5. Retroreflective daylight system according to one of claims 1-4, characterized characterized in that the glass tubes are arranged in the interior behind the glazing. 6. Retroreflective daylight system according to one of claims 1-5, characterized characterized in that the glass tubes are arranged outside the building.