JPS61114206A - Light collecting device - Google Patents

Abstract

PURPOSE:To improve light collection efficiency and to allow use even when it is cloudy by arranging light collecting plates in which a fluorescent material is dispersed in an array and in the thickness direction at intervals, and coupling optical transmission lines with end parts of those light collecting plates. CONSTITUTION:The transparent light collecting plates 3 in which the fluorescent material is dispersed are arranged in an array and in the thickness direction at intervals, and the optical transmission lines are coupled with the end parts of those light collecting plates. Incident light in the visible range which entering a light collecting plate 3 is absorbed by the fluorescent material in the light collecting plate 3 to activate (energize) it, so the fluorescent material radiates light which has spectral components deviating from the incident light to the infrared range in a radial direction centered on the fluorescent material. Then, the radiation light from the fluorescent material is condensed on both end parts of each light collecting plate 3 eventually and converged through a Fresnel lens 14 while generating new radiation light absorbed by another fluorescent material in the same or lower light collecting plate 3 or reflected repeatedly and alternately by the upper and lower critical surfaces of each light collecting plate 3, thereby irradiating end parts of the optical fibers. The irradiated radiation light is transmitted to a specific place through an optical fiber cable 16.

Description

Detailed Description of the Invention "Industrial Application Field 1 The present invention relates to a device that collects sunlight and transmits it to a predetermined space. This relates to a daylighting device.

``Prior Art'' Conventionally, as devices for collecting light in the 1iTfln range, there are known devices that use direct light and devices that use 2 observatory sources (indirect light). An example of a direct light type device is one that focuses light using a Fresnel lens and transmits the focused source through a source fiber or the like. Further, as a sky light type device, there is one that uses a number of sputum-shaped reflective plates arranged in parallel.

``Problem 1 to be solved by the invention By the way, when using these devices to collect sunlight, the direct light type devices have a very large drawback in that they cannot be used on cloudy days.

In addition, even on sunny days, the Fresnel lens is always directed in the direction of incidence of sunlight (for example, a mechanical device (for example, automatic sunlight tracking device M) and ancillary equipment such as a power source are required, making the entire device large-scale. This limits the installation location and makes the device expensive.On the other hand, the 11KW 1-Tenkuu model device has the advantage of being usable for Inu Samurai, but the lighting area is small and the transmission path is There is a silver lining in that the losses are large.

"Means for Solving the Problems" The present invention has been made to solve the problems mentioned above. It is characterized in that several bumps are arranged in a row at intervals in the thickness direction, and an optical transmission path is connected to the ends of these lighting plates.

"Function" In the daylighting device of the present invention, when direct light, sky light, etc. enters the daylighting plate, the phosphor is excited and emits light, and the light from this phosphor is collected at the end of the daylighting plate. and is transmitted via an optical transmission line. Moreover, when the lighting plates are troweled by the incident light, an air flow due to natural convection flows between each lighting plate.

``Example'' Hereinafter, one example of the present invention will be explained based on FIGS. Inside this protective case 2, several lighting plates 3 are arranged parallel to each other in the thickness direction IIC in a row of 1 cil x valley. At the same time, both ends G (both ends in the direction of the axis XX) of these daylighting plates 30 K are connected to optical transmission lines 4 for transmitting the light collected by the daylighting plates 3 to a predetermined location.

The two protective nurses, a box-shaped nurse main body 5 with an open top, a transparent 72 lid body 6 that closes the top of the case main body 5 and faces the uppermost lighting plate 3, and these cases. It consists of a joint portion between the main body 5 and the lid 6 and a dustproof cover 7 that covers the periphery 2 of the case main body 5. The case body 5 has a large number of ventilation holes 8 passing through the side walls and the bottom plate, and has a reflective surface 9 made of gold J4 foil (for example, aluminum Wl) pasted on its inner surface. The light that enters the protective case 2 through the reflective surface 8 is reflected by the reflective surface 8, thereby increasing the original efficiency of irradiating the lighting plate 3. The recording body 6 is, for example, a flat tempered glass plate, and its upper surface is provided with a reflective film layer (as shown) that reflects infrared rays, that is, heat rays, to reduce the temperature rise inside the protective case 2. There are two VCs to keep it down.

The lighting plate 3 is made of heat 11]ffl resin (for example, acrylic resin or polycarbonate resin), K phosphor (for example, C
The main components are oxides, sulfides, sulfates, tungsten salts, etc. of a, Ba, Mg, Zn, Cd, etc., and Mns A g -, Cu, S b % P
b, etc. as an activator and fired) is uniformly divided into a plate shape and formed into a plate shape. , the tap in Figure 1 (
A reflective film 1o is provided, which is formed by pasting metal foil or by applying a metal plating process using a knife or pressure. In addition, all the lighting plates 3rt are fixed to the bottom plate part of the case body 5 by bolts 11 passing through them in the thickness direction Ic, and spacers (for example, Washer extrapolated to bolt 11)
Furthermore, a spacer 13 is provided between the lighting plate 3 of the iron tier and the case body 5 to maintain a distance between them.

As shown in the optical transmission line 4v'i, the Fresnel lenses 14 are attached to both ends of a plurality of lighting plates 30, and the ends of the seven Fresnel lenses 14 are arranged opposite to the focal positions of the lenses 14. It consists of original fibers 15 that are pulled out by bending the side wall of the case body 5. These original fibers 15 are gathered into a bundle outside the Ni1 case 2 to form the original fiber cable 16, and are laid down to the location.

In addition, the reference numeral 17ri in the figure indicates a holder for fixing the end of the original fiber 15 to the side wall of the case body 5.

The lighting device configured in this way can be installed, for example, in a state where the protective teeth 2 are inclined with respect to the horizontal direction, as shown in FIG. It is installed outdoors and fixed so that it forms a slope.

Then, direct sunlight and sky light enter the light panel 3 from all directions via the bell body 6. The 131fJ that entered this sharp lighting plate 3! The incident light in the area is absorbed by the phosphor in the light-lighting plate 3 and activates (excites) it, so the phosphor emits light with a spectral component shifted to the infrared region compared to the incident light. It radiates in a radial direction centered on the body. Next, the emitted light from the phosphor is transmitted through the same lighting plate 3.
, or is absorbed by another phosphor in the daylighting plate 3 of the F stage, generating #r' synchrotron radiation, or alternatively at the critical surface of the upper side of each daylighting plate 3. The reflection t- is reflected once, and finally it is contracted by 1 at both ends of each lighting plate 3, and the third
The emitted light is focused by the Fresnel lens 14 and radiated to the end of the original fiber 15. The incident light or the emitted light that passes through all the lighting plates 3f and reaches the reflective film 1o is reflected by the reflective film 1° indicated by the arrow (b) in Figure 3. to excite the phosphor again.

- If the 3 daylighting plates are heated by the incident light during daylighting, there is a risk of deformation or deterioration. Natural convection occurs and the temperature rise of the lighting plate 30 is suppressed. In other words, the air inside the protective case 2, which has been cooled down by the heat radiation from the lighting plate 3, rises and is protected from the ventilation hole 8 at the position <1.1:r16 indicated by the arrow in Figs. The cold air from the outside world flows out of the case 2, and along with this, cold air from the outside world flows into the protective case 2 through the air hole 8 at the do position, resulting in each of the vertically slanted lightings shown in Figure 1. It curves between the plates 3 and passes upward while taking away the heat from the lighting plate 3. By the way, the dust cover 7ri
, prevent dust and rainwater from entering the protective case 2 through the ventilation holes 8, etc., and keep the top surface of the lighting plate 30) clean.
Moreover, corrosion of the inner surface of the case body 5 is prevented.

In addition, in the above-mentioned Example VC, both I part and both I part of the lighting plate 30
The optical transmission line 4 may be connected to all sides of the Ia1 section, or may be connected only to one end. Also, Fresnel lens 14f
j: If each daylighting board 3 is taken out so that it can be cut, the original state of the air between the daylighting boards 3 can be further knitted.

"Effects of the Invention" As explained above, according to the present invention, the following 72 excellent effects can be obtained.

■ The top surface of the lighting board can be used as a lighting surface, and it can capture both direct light and sky light, so the lighting efficiency is extremely good, and it has also been used for saken-inu samurai. I can do it.

■ Since no large-scale auxiliary equipment is required, equipment costs are low, and there are no restrictions on installation location.

■ I! It operates simply by placing it in one place, so maintenance costs are low.
Since no air circuit is required, safety and long-term reliability are ensured, and maintenance is easy.

■ While increasing the number of photodetectors by using several number of daylighting plates, by providing space between the daylighting plates, airflow due to natural convection can flow between the daylighting plates, and the number of daylighting doctors can be increased. It is possible to suppress the rise in

■ If a Fresnel lens is provided on the end face of the lighting plate, and this Fresnel lens is used to converge the source of the lighting plate, the number of I-running fibers can be reduced by IIi, and a cheaper +d[i2 device can be obtained. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an example of the present invention, FIG. 2 is a view taken along the line 1--2 in FIG. 1, and FIG. 3 is an enlarged sectional view of the main parts to explain the operation. 2...Protective case, 3...Lighting board, 4
......Optical transmission line, 8...Ventilation hole, IO・
...Reflection film, 11...Pol), 12.1
3...Spacer, 14...Fresnel lens, 15...Original fiber, 16...
Original fiber table, S...t...interval.

Claims (1)

[Claims] A plurality of transparent lighting plates having fluorescent materials dispersed therein are arranged in a row at intervals in the thickness direction, and an optical transmission path is connected to the ends of these lighting plates. Lighting device.