JPH1181813A - Daylighting and thermal insulation window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create light indoor environment which has the thermal insulation property and takes in natural light stably by arranging a linear Fresnel lens between a transparent or translucent plate material through, which light penetrates and scatters and a transparent plate material, and forming an air layer between the plate material on one side and the linear Fresnel lens. SOLUTION: A linear Fresnel lens 2 is arranged between a transparent or translucent figured glass 1 through which light penetrates and scatters and a transparent glass 3 to constitute a daylighting lens system multiple layer face material S having a three layer structure on the whole. An outer surface of the figured glass 1 is smooth, and an inner surface thereof, namely, a surface on a side which faces the linear Fresnel lens 2, is a rugged face. Moreover, a surface of a side which faces a recessed and projecting part of the figured glass 1 of the linear Fresnel lens 2 is a stairlike Fresnel face 2a, and a surface on a side which faces the transparent glass 3 thereof is smooth. An air layer is formed between at least either of the figured glass 1 and the transparent glass 3 and the linear Fresnel lens 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a daylighting and heat-insulating window having a heat-insulating function at the same time as natural light.

[0002]

2. Description of the Related Art Conventionally, as a window having high heat insulating performance, there has been a double-glazed glass having an air layer formed therein. It was difficult.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to stably capture natural light regardless of whether it is sunny or cloudy. Another object of the present invention is to provide a daylighting and heat insulating window having a heat insulating function as well as creating a bright indoor environment.

[0004]

The daylighting and heat insulating window of the present invention comprises a transparent or translucent plate material for transmitting and scattering light, and a linear Fresnel lens disposed between the transparent plate material. Wherein an air layer is formed between at least one of the plate members and the linear Fresnel lens.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a template glass, 2 denotes a linear Fresnel lens, and 3 denotes a transparent glass. As a whole, the template glass 1 and the transparent glass 3 form a three-layer daylighting lens system sandwiching the linear Fresnel lens 2. It constitutes the layer face material S.

The transparent or translucent plate material for transmitting and scattering light in the present invention is not limited to the above-mentioned template glass 1 and is a plate material made of glass or a synthetic resin such as an acrylic resin, and has one or both surfaces. Any one may be used as long as it has irregularities. In the above irregularities,
Fine irregularities such as ground glass are also included.

The template glass 1 has a smooth outer surface to facilitate cleaning, and has an irregular surface on the inner side, that is, on the side facing the linear Fresnel lens 2. The template glass may have irregularities on both sides or irregularities on the outside. Further, it is preferable that the template glass 1 is made of netted glass in a fire prevention / quasi-fire prevention area.

The linear type Fresnel lens 2 has a stepped Fresnel surface 2a on the side facing the irregularities of the template glass 1 and has a smooth surface on the side facing the transparent glass 3. ing. The Fresnel grooves 2a 'in the Fresnel surface 2a are horizontally oriented. The thickness of the linear Fresnel lens 2 is usually about 1 to 2 mm.

FIG. 2 is a schematic view showing a case where sunlight and fluorescent light, a tungsten bulb and a condensing transmission device which emits sunlight through an optical fiber are irradiated with an acrylic flat plate (3 m).
(thickness) is calculated for each of the spectral intensity wavelengths of the emission light transmitted through the acrylic flat plate, and a graph is obtained. It can be seen that the spectral distribution of sunlight obtained through the acrylic flat plate is almost similar to sunlight. Therefore, it is confirmed that the acrylic flat plate is most suitable as a material for a daylighting window that allows natural light to enter the room. The above linear type Fresnel lens 2
Is, in addition to the acrylic resin, a polycarbonate resin,
A resin material such as a vinyl chloride resin may be used.

FIG. 3 shows the linear Fresnel lens 2 described above.
The convergence of the emitted light with respect to the change and width of the incident angle of sunlight was measured for the case (A) in which the Fresnel surface 2a was directed to the exit light side and the case (B) in which the Fresnel surface 2a was directed to the incident light side. ,
From this measurement result, it is understood that the case (B) in which the Fresnel surface 2a is directed to the incident light side is more effective. Although the embodiment of FIG. 1 shows a case where the Fresnel surface 2a faces the incident light side, that is, the mold plate glass 1, the present invention emits the Fresnel surface 2a as shown in (A) above. It may be directed to the light side, that is, the transparent glass 3 side.

By using a known ultraviolet absorbing glass as the template glass 1 and the transparent glass 3, it is possible to obtain a light with ultraviolet rays cut off. In addition, a known ultraviolet absorber is mixed into the linear Fresnel lens 2 to achieve the same purpose as above.

The transparent glass 3 has a smooth surface on both sides and generally has a thickness of about 2 to 4 mm.
It is preferable to make it thicker or to make a laminated glass.

The daylighting lens system multi-layer face material S used for the daylighting / insulation window of the present invention is configured as described above. As shown in FIG. The incident light is obliquely incident on the outer surface of the glass plate 1, and the transmitted light is diffused by the irregularities of the template glass 1 and refracted by the Fresnel surface 2a of the linear type Fresnel lens 2 at the same time as being converged. The light is emitted in a substantially vertical direction and enters the room, and as a result, the room becomes brighter toward the back. This daylighting effect is also apparent from the measurement results shown in FIGS.

FIG. 4 shows an embodiment of the daylighting and heat insulating window of the present invention. The daylighting lens system multi-layer face material S having the three-layer structure of the template glass 1, the linear Fresnel lens 2 and the transparent glass 3 is shown. It is configured to be stored in the window sash 4. 5
Is a watertight sealing material. As is evident in FIG.
An air layer G is formed at intervals between the template glass 1 and the linear Fresnel lens 2 and has a heat insulating function. An air layer G is also provided between the linear type Fresnel lens 2 and the transparent glass 3 with a space therebetween, and has a heat insulating function. As the daylighting / insulation window of the present invention, any other windows such as curtain walls and glass screens may be used as long as the daylighting lens system multi-layer surface material S is incorporated in the daylighting opening of the building.

FIG. 5 shows another embodiment in which a reflection blind having one surface as a reflection surface is provided inside a lighting and heat insulating window, and by controlling the direction of light emitted from the lighting and heat insulating window, For example, it is possible to brighten the area immediately below the window, such as in a kitchen.

[0016]

Advantages of the Invention 1) Natural light can always be stably taken in regardless of whether it is sunny or cloudy, and a bright indoor environment can be obtained. 2) Since it has a heat insulating function, heat loss from windows can be reduced. 3) Since it has a heat insulating function, it is possible to prevent clouding and dew condensation of the daylighting lens.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a daylighting system of the present invention.

FIG. 2 is a graph showing the spectrum intensity of an acrylic plate or the like at each wavelength.

FIG. 3 is a diagram illustrating characteristics of an exit angle with respect to an incident angle of a linear Fresnel lens.

FIG. 4 is a partially cutaway perspective view of a lighting window.

FIG. 5 is a cross-sectional view of a lighting window combined with a reflective blind.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Type plate glass 2 Linear type Fresnel lens 2a Fresnel surface 2a 'Fresnel groove 3 Transparent glass 4 Window sash 5 Watertight sealing material G Air layer S Daylighting lens system multilayer surface material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuru Osawa 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Masao Komatsu 3-29-8 Kitasenzoku, Ota-ku, Tokyo

Claims (1)

[Claims] A linear Fresnel lens is disposed between a transparent or translucent plate for transmitting / scattering light and a transparent plate, and at least one of these plates is connected to the linear Fresnel. A daylighting and heat-insulating window characterized by forming an air layer between the lens and the lens.