Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1985-12-18
1987-12-29
Bennet, Henry A.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126429, 126440, F24J 218
Patent
active
047153580
DESCRIPTION:
BRIEF SUMMARY
AREA OF TECHNOLOGY OF THE INVENTION
The invention relates to an apparatus for automatic control of incident solar radiation, with essentially transparent wall elements and essentially opaque elements which are arranged horizontally along their long axis and are arranged at intervals from each other on the vertical axis so that light emanating from any one opaque element is not reflected directly back to it by any other opaque element.
STATE OF THE ART
Venetian blinds for shading living areas are already known, consisting of several parallel slats arranged one above the other, and they may be fixed in front of or behind a window. In order to allow the greatest possible amount of daylight to enter the living area and at the same time to prevent the eyes of the people in the room being dazzled, a special conformation of such venetian blinds has been proposed, wherein the slats are provided with a metallic sheen on their upper sides and with a light-absorbing material on their underneath sides, (U.S. Pat. No. 689,474). This configuration however enables undesirable radiation from a window to the interior space and vice versa.
Furthermore there is known a solar collector element for transformation of absorbed solar energy, wherein the absorption surface consists of a vertical wall of parallel, aluminium slats arranged one above the other (German Offenlegungsschrift No. 2522154). These slats are arcuate in shape, so that all the reflected beams fall onto the closest adjacent slat at the time. Thereby all of the incident solar energy is directed onto the absorption surface. As this absorption surface is however opaque it cannot be used for light control.
From the previously lodged application German Offenlegungsschrift No. 2807421, which is however not a prior publication, there is known a device for controlling the climate in a closed space, including a so-called sun blind which reflects the greatest possible part of the sun's rays onto the interior wall of the space. This sun blind consists of triangular elements arranged one above the other which reflect the light towards the exterior when the angle of incidence of the solar radiation is high and when the angle of incidence of the solar radiation is low direct the light onto a narrow absorption surface. With this device light cannot enter the room behind the sun blind. Moreover with the elements arranged in the form of mirrors the light cannot be concentrated onto the absorption surface by double reflection. It follows that only for a very limited range of the angle of incidence is radiation reflected onto the absorption surface, with the result that even with diffuse radiation the room is inevitably darkened.
In another known cover for light admitting apertures, windows and the like, at least partially opaque prism elements are provided on a steeply upwardly inclined surface, wherein the opaque prism surfaces face down into the area to be illuminated (German Offenlegungsschrift No. 2615379). The opaque prism surfaces may be covered with absorptive or reflective coatings and may be located behind and/or in front of a glass wall. When they are located between two panes of glass the prisms are protected from getting dirty, and so the prisms may be made from extruded transparent plastics material. The choice of the angles of the prism surfaces to each other and relative to the horizontal or vertical depends among other things on the critical angle determined according to the geographical latitude. In summer the light falling at a very steep angle of incidence is redirected into the far side of the interior space, while the solar rays falling at a flat angle of incidence are reflected outside. This known form of protection can't be used for cooling in summer or for heating in winter.
Furthermore there is known an apparatus for controlling the passage of heat and light radiation through apertures in buildings, which sets out to prevent the entry of heat from the outside in warm weather and to allow more heat to enter in cooler weather (German Offenlegungsschrif
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patent: 4222370 (1980-09-01), DeGeus
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