DE3446662A1 - Blind - Google Patents

Abstract

The invention relates to a blind with horizontal or vertical slats which can be rotated by 180 DEG . In order to prevent, in a window, the penetration of radiant heat from outside into the associated room or the loss of radiant heat from the room, simultaneously maintaining sufficient residual brightness in the daytime which allows normal working or living without artificial lighting in the room, a blind is proposed according to the invention, the slats of which consist of light-permeable material and have a layer (2) reflecting heat radiation in one direction of passage. <IMAGE>

Description

The invention relates to a blind according to the preamble

of the main claim.

To the performance of air conditioning systems (cooling capacity), especially in warmer ones Climatic zones of the earth, to reduce, have been used in the building construction sector for a long time Window panes are used which, when daylight passes through, reduce the amount of im Reduce the radiant heat present in the daylight at the passage. This becomes physical achieved by reflection or interference of the infrared radiation contained in the light. combinations of both physical principles can also be used. This desired high degree of reflection or interference is achieved on the Panes by coating the carrier material (glass, plastic panes) with thin metal or metal oxide layers, including different layer metals and layer thicknesses can be combined. It can be coated through the use of such Panes, depending on the degree of efficiency, additional heating of the rooms by the thermal radiation prevented or reduced to a high percentage.

For some time, such disks have also been used in the opposite direction used to save energy, i.e. to save heating energy, namely particularly in medium to colder climates on earth. In this However, only the use of disks in which the passage of radiant heat in one direction of passage is prevented by reflection will. This makes it possible to reduce the radiant heat coming from outside onto the pane occurs to use for heating. The one directed out of the room from the inside out In this case, radiant heat is reflected on the pane and thus into the Space thrown back. This increases the insulation efficiency of the windows that in a conventional house at the moment still a high proportion, depending on the house type up to 40 ° Ó, in the energy loss balance.

In both cases, the radiant heat is reflected by means of the Slices the task of saving energy was only partially or insufficiently solved. When the climatic situation is reversed, contrary to the reason for using the panes, both solutions have significant disadvantages. When using the discs to save In the winter months, the heat radiation that can be used free of charge is converted from cooling energy Not used for heating purposes, i.e. it has to be generated by additional energy.

When using these disks to save heating energy the rooms in the summer months additionally undesirable due to the radiant heat heated up. Radiant heat from the room can then be sent to the as a result of the reflection Slices do not escape. To prevent this, the rooms must also be in the warm summer months, or the window must be an opaque one Blinds must be connected upstream, which prevent the penetration of radiant heat. In some cases this can mean that the room is artificially lit during the day Need to become.

To take advantage of both uses of the radiant heat Combining reflective panes could create a window that can be rotated through 1800 imagine which, depending on the season, can be turned in the desired direction of action can. However, such a solution would be technically complicated in terms of tightness and forced air flow and accordingly expensive.

The invention is therefore based on the object of an inexpensive and easy to find a realizable solution, with the one in existing buildings without remodeling the window in the summer months the heat radiation and in the winter months preventing heat loss through the windows.

It is therefore proposed according to the invention, a slat blind of the type mentioned with the features of the characterizing part of the main claim to train.

The further design of the subject matter of the invention is based on the features of the subclaims.

The advantage achieved by the invention is that with constructive simple means an effective energy saving by simply retrofitting existing ones Window can be achieved with the blind according to the invention, the cost of which are relatively low.

An embodiment of the invention is shown in the drawing. This shows a section through a slat of the blind.

The lamella 1 consists of acrylic glass and has one on one side Layer 2 reflecting the thermal radiation in a passage direction.

In the blind, which has not been shown here, slats 1 are arranged to be rotatable by 1800.

With a suitable rotating mechanism or cable pull, the slats in the desired direction of action, i.e.

in summer or winter position. For optical detection are the slats for the respective active position e.g. by colored stripes or symbols marked.

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Claims (5)

Blind patent claims 1. Blind with horizontal or vertical Slats which can be rotated by 1800, characterized in that the slats (1) consist of translucent material and one the thermal radiation in a passage direction have reflective layer (2). 2. Blind according to claim 1, characterized in that the slats (1) are see-through. 3. Blind according to claim 2, characterized in that the slats consist of acrylic glass. 4. Blind according to claim 1, characterized in that the reflective Layer (2) of at least one metal or metal oxide layer known per se consists. 5. Blind according to claim 1, characterized in that the direction of action the blind or the slats (1) is marked.