JP3656794B2 - Daylighting and insulation windows - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a daylighting / insulating window having a heat insulating function while daylighting natural light.
[0002]
[Prior art]
Conventionally, as a window with high heat insulation performance, there has been a double-glazed glass with an air layer, but the lighting performance is almost the same as that of a single plate glass, and it is difficult to effectively light up to the back of the room. It was.
[0003]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described conventional problems, and the object of the present invention is to be able to stably capture natural light regardless of whether it is sunny or cloudy, and create a bright indoor environment. The object is to provide a daylighting / insulating window having a heat insulating function.
[0004]
[Means for Solving the Problems]
The daylighting and heat insulating window of the present invention is provided on the incident side, and is formed with irregularities on one side or both sides, and transparent or translucent plate material that transmits and scatters incident light to the inside, and the plate material is separated from the space. Another transparent plate provided on the exit side, and provided in the space between these plates, the Fresnel surface facing the plate on the incident side, and at least one of the two plates wherein the linear Fresnel lens to form an air layer, that consists of between.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a template glass, 2 is a linear type Fresnel lens, and 3 is a transparent glass. As a whole, a three-layered daylighting lens system compounding the linear type Fresnel lens 2 between the template glass 1 and the transparent glass 3. The layer face material S is configured.
[0006]
The transparent or translucent plate material that transmits and scatters light in the present invention is not limited to the above-described template glass 1, and is a plate material made of synthetic resin such as glass or acrylic resin, and has unevenness on one or both sides. Any may be used as long as it is formed. The unevenness includes fine unevenness such as ground glass.
[0007]
The template glass 1 has a smooth outer surface to facilitate cleaning, and the inner surface, that is, the surface facing the linear Fresnel lens 2 is uneven. In addition, as for the said template glass, both surfaces may be uneven | corrugated or the outer side may be uneven | corrugated. Moreover, it is preferable that the said template glass 1 uses a net-filled glass in a fire prevention and semi-fire prevention area.
[0008]
The linear type Fresnel lens 2 has a stepped Fresnel surface 2a on the surface facing the irregularities of the template glass 1 and a smooth surface on the side facing the transparent glass 3. The Fresnel groove 2a 'of the Fresnel surface 2a is horizontally oriented. The thickness of the linear type Fresnel lens 2 is usually about 1 to 2 mm.
[0009]
FIG. 2 shows the spectral intensities of sunlight, fluorescent light, tungsten light bulbs, and emitted light from a condensing transmission device that emits sunlight through an optical fiber, and emitted light obtained by transmitting sunlight through an acrylic flat plate (3 mm thick). It is calculated and graphed for each wavelength, and 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 for taking in natural light indoors. The linear type Fresnel lens 2 may be a resin material such as polycarbonate resin or vinyl chloride resin in addition to the acrylic resin.
[0010]
FIG. 3 shows the case where the Fresnel surface 2a of the linear type Fresnel lens 2 is directed to the outgoing light side (A) and conversely (B) directed to the incident light side with respect to the change or width of the incident angle of sunlight. The convergence of the emitted light was measured, and it can be seen from this measurement result that (B) with the Fresnel surface 2a facing the incident light side is more effective. 1 shows the case where the Fresnel surface 2a is directed to the incident light side, that is, the template glass 1 side. In the present invention, the Fresnel surface 2a is emitted as shown in (A) above. You may face to the light side, ie, the transparent glass 3 side.
[0011]
By using a known ultraviolet absorbing glass as the template glass 1 or the transparent glass 3, it is possible to obtain daylight with ultraviolet rays cut. Further, a known ultraviolet absorber can be mixed in the linear Fresnel lens 2 to achieve the same purpose as described above.
[0012]
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 laminated glass.
[0013]
Since the daylighting lens system multilayered surface material S used for the daylighting and heat insulation window of the present invention is configured as described above, incident light of natural light from the outside is outside the template glass 1 as shown in FIG. Although the light is incident on the surface obliquely from above, the transmitted light is diffused by the unevenness of the template glass 1 and refracted by the Fresnel surface 2 a of the linear type Fresnel lens 2 and simultaneously converged, and is substantially perpendicular to the transparent glass 3. Directionally emitted light enters the room, and as a result, the room becomes brighter to the back. This daylighting effect is also apparent from the measurement results shown in FIGS.
[0014]
FIG. 4 shows an embodiment of the daylighting and heat insulation window of the present invention. A daylighting lens system multilayer surface material S having a three-layer structure of the template glass 1, the linear type Fresnel lens 2 and the transparent glass 3 is used as a window sash 4. It is configured to fit in. Reference numeral 5 denotes a watertight seal material. As is apparent from FIG. 4, an air layer G is formed between the template glass 1 and the linear Fresnel lens 2 so as to have a heat insulating function. Further, an air layer G is formed between the linear Fresnel lens 2 and the transparent glass 3 so as to have a heat insulating function. The daylighting / heat insulating window of the present invention may be any as long as it is constructed by incorporating the daylighting lens system multilayer surface material S into the daylighting opening of the building, such as a curtain wall or a glass screen.
[0015]
FIG. 5 shows another embodiment in which a reflection blind having one side as a reflection surface is provided inside the daylighting / heat insulation window. By controlling the direction of light emitted from the daylighting / heat insulation window, for example, kitchen It is possible to brighten the area immediately below the window.
[0016]
【The invention's effect】
1) Regardless of whether it is sunny or cloudy, it is always possible to capture natural light stably, and a bright indoor environment can be obtained, so that energy can be saved for indoor lighting.
2) Since it has a heat insulating function, heat loss from the window can be reduced.
3) Since it has a heat insulating function, fogging and dew condensation of the daylighting lens can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a daylighting system of the present invention.
FIG. 2 is a graph showing the spectral intensity of an acrylic plate or the like at each wavelength.
FIG. 3 is a diagram illustrating a characteristic of an emission angle with respect to an incident angle of a linear type Fresnel lens.
FIG. 4 is a partially cutaway perspective view of a daylighting window.
FIG. 5 is a sectional view of a daylighting window combined with a reflective blind.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Type | mold plate glass 2 Linear type | mold Fresnel lens 2a Fresnel surface 2a 'Fresnel groove | channel 3 Transparent glass 4 Window sash 5 Watertight sealing material G Air layer S Daylighting lens system multilayer surface material

Claims (1)

A transparent or translucent plate material that is provided on the incident side and has irregularities on one or both sides to transmit and scatter incident light inward, and another transparent material provided on the emission side with a space from the plate material The plate material is provided in a space between these plate materials, the Fresnel surface thereof faces the plate material on the incident side, and an air layer is formed between at least one of the two plate materials. A daylighting and heat insulation window comprising a linear Fresnel lens.

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