JPH03249607A - Light collecting device - Google Patents

Abstract

PURPOSE:To obtain the device which is a fixed type and in light and thin structure by arranging a parabolic mirror on the bottom surface of a light converging device, arranging an optical fiber which guides light in from a flank at the focus of the mirror, and guiding the light in. CONSTITUTION:The parabolic mirror 12b is arranged on the bottom surface of the light converging device and the optical fiber 12a which guides the light in from the flank is arranged at the focus of the mirror to guide the light in. Namely, a body of thin constitution is installed on a roof and light other than light from the roof is converged by the parabolic mirror 12b band guided into the room efficiently by the optical fiber 12a which is arranged at the focus position. Consequently, the light collection efficiency is improved and a photodetecting device can be made thin.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) [Field of Industrial Application] The present invention relates to an improvement in a daylighting device used for lighting and air conditioning in residential buildings, office buildings, and the like.

(b) [Prior art] Conventionally, a lighting device that guides outdoor light into a room is disclosed in Japanese Patent Application Laid-Open No. 62-9.
As shown in Publication No. 6914, sunlight collected by a lens or the like was transmitted to an appropriate room using an optical fiber, and a light diffusion device was used at the exit of this optical fiber to introduce sunlight into the required room. .

(C) [Problems to be Solved by the Invention] Such a lighting device has the following problems.

■The sun must be tracked, resulting in a complex configuration.

■This made it expensive.

■Energy is required for tracking.

■Due to the tracking device, the device is large and cannot be made thin, making it difficult to apply to existing roof shapes.

An object of the present invention is to provide a daylighting device that solves the above-mentioned problems of the conventional device.

(c) [Means for Solving the Problems] The present invention solves the problems of the conventional technology by using optical fibers in the lighting section and making it fixed, light and thin in the lighting system that guides sunlight indoors as described below. solved.

That is, one aspect of the present invention relates to a daylighting device in which parabolic mirrors are arranged on the bottom surface of a condensing device, and an optical fiber of the type that introduces light from the side is arranged at the focal point of the parabolic mirrors to introduce light.

In this case, the optical fiber has two layers: a cladding layer and a core layer.
A cladded optical fiber with a layered structure is used, and the light guide section is processed to have a rough surface with multiple holes extending all the way around the cladding layer to the core layer, allowing light to enter the fiber. However, the light guiding portion may be left unprocessed.

Furthermore, a lighting device may be used in which a transparent type optical fiber in which a reflective material or a fluorescent agent is dispersed is used as the optical fiber.

Furthermore, by arranging a required number of one unit having the above configuration in parallel, it is possible to obtain a lighting device that can provide lighting with the required illuminance.

(E) [Function] The present invention is a lighting device configured to take in light by arranging a parabolic mirror on the bottom of a condensing device and arranging an optical fiber of the type that introduces light from the side to the focal point, By installing a thin structure on the roof, light from outside is focused by a parabolic mirror.

The optical fiber placed at the focal point of the parabolic mirror efficiently guides the light indoors and transmits it to each desired room.

At this time, if an air supply/discharge function is added as needed, each room can also be ventilated.

(Example) Next, an example of a daylighting device according to the present invention will be described with reference to FIGS. 1 and 2.

Figure 1 shows an example of a house using the present invention, with the building facing south, rooms on the first floor, rooms on the 12th floor, and rooms on the 12th floor. There are 3 baths and 4 kitchens on the north side. Basement basement 5. The roof 6 has a lighting device 7.

In this building, basement 5 is, of course.

There are no windows in the bath 3 and kitchen 4 on the north side, so there is only one wall 8.
The walls are made of sufficiently thick insulating walls, while daytime lighting in these rooms uses light from daylighting device 7, and light diffusers W9 and 10 are installed.
．． 11 so that light is supplied to each room 3, 4.5.

In this case, the daylighting device 7 includes a parabolic mirror daylighting section 1λ fitted into the roof 6 as shown in the figure, an optical fiber 12a through which sunlight is brought in, and a ventilation fan 13 that takes in or exhausts air. ．． These lighting department top and fan 1
A hood that collects both sunlight and air introduced by 3.14. Fresnel lens 17 for converting the sunlight rays irradiated from the lighting section 2 into parallel lines. It is composed of a transparent plate 18 made of a plate-shaped or square-shaped transparent material.

As shown in the partially enlarged view of FIG. 2, the side structure of the lighting section 12 is such that the optical fiber 12a is housed within a parabolic mirror 12b and then placed within a notch 12c of the roof 6. 12d is a transparent cover.

In addition, Fig. 3 (a) is a plan view, and the same figure (b) is the x- of (a).
As shown in 5 as an x' cross-sectional view, a box-shaped transparent cover 12d
Three parabolic mirrors 12b, ~12b3 with a U-shaped cross section are installed inside, and a light guide section S of three optical fibers 12a1 ~ 12a3 is installed at each focal point of these paraboloids M12b, ~12b. They are arranged to form a daylight section 12, and sunlight is brought in through optical fibers.

In this case, the optical fibers 12a, -12a.

As shown in FIG. 3, a cladding type optical fiber with a two-layer structure is used, and as shown in FIG. The surface is processed to have a so-called rough surface with a plurality of holes reaching up to .

As a result, as shown in Fig. 2 (b), holes m+, mz, ml, ·, which are long enough to reach the core layer f2, are formed in the upper cladding layer f1 constituting the optical fiber, and from these holes, holes in the core layer are formed. 2, it is designed to effectively guide sunlight.

On the other hand, a portion of the transparent cover 12d that functions as a light guiding portion is left unprocessed so that its outer periphery forms a smooth surface. In this way, the collecting part S of the optical fibers is processed to have a rough surface over the entire outer circumference.Since a concave mirror is used in the present invention, there is also light that is reflected by this and enters from below. This was taken into consideration.

In addition, as the optical fibers 12a to 12a3, instead of the above-mentioned two-layer optical fibers, transparent type optical fibers in which reflective material made of metal pieces such as silver or aluminum or fluorescent material is dispersed are used. It's okay.

Examples of fluorescent materials in this case include azine-based materials such as acridine yellow, sacranin, thionine, benzyltriethylammonium chloride, etc., and perylene-based materials such as perylene and 5olvent Green.
n5 (trade name: manufactured by Sumitomo Chemical Co., Ltd.), etc. can be used.

Note that azine-based fluorescent materials are preferable because they have relatively high fluorescence efficiency.

The lighting device shown in FIGS. 2 and 3 is used as one unit, and by connecting a plurality of units, it is possible to correspond to various required illuminances.

Light guide duct 1 that guides light to each room 1 to 5 for this lighting section
9 are connected.

Further, the aforementioned transparent plate 18 is provided with an appropriate number of ventilation holes.

The light guiding duct 19 is a cylindrical duct whose entire inner wall is used as a light reflecting surface, as shown in FIG.

For the rooms 3, 4.5, which are integrated into the building as fixed ducts passing through the walls 8 and the ceiling 21, 1 through which the light is guided.

While outside air or temperature-controlled air is supplied through the loopers 22, 23, and 24, the loopers can also be used as ventilation ducts or ventilation paths for discharging dirty air outdoors.

In addition, 25 and 26 are auxiliary ducts for supplying outside air and temperature-controlled air to rooms 1 and 2 facing the south side, and for ventilation of these rooms, and are auxiliary ducts for supplying outside air and temperature-controlled air to rooms 1 and 2 facing the south side, and for ventilation of these rooms. It is communicated with the light guide duct 19.

In the above configuration, during the day, sunlight is not only collected by the daylighting device 7 and supplied to each room 3, 4.5 on the north side, but also the same device is used to supply outside air and temperature-controlled air. These rooms 3, 4, and 5 do not necessarily have windows (lighting) because they can supply air and ventilate dirty air.

This eliminates the need for ventilation (ventilation), increases the degree of freedom in arranging rooms in a building, and insulates each room.

Heat insulation and soundproofing have become relatively easy, leading to energy-efficient buildings, air conditioning that utilizes energy inside and outside the building,
This is what makes lighting possible.

(G) [Effects of the Invention] Since the present invention is configured as described above, it has the following excellent effects.

■Light from outdoors is focused by a parabolic mirror and then guided indoors by an optical fiber placed at the focal point of the parabolic mirror, greatly improving lighting efficiency. Since the light receiving device can be made thin, it can be easily installed on the roof of an existing building.

■One or more pairs of parabolic mirrors and optical fibers arranged side by side are considered as one unit, and multiple units can be used in parallel as needed, so that the daylighting device of the present invention can be applied to one place. It is possible to adjust the illumination intensity to any value.

■The entire outer periphery of the optical fiber is processed to have a rough surface, so it can track the movement of the sun without the need for a large-scale tracking device like in the past. Combined with the condensing and reflecting effects of the concave mirror, it is possible to track the sun. Since the light beam can be effectively taken in throughout the day, it is economical as it eliminates the need for a tracking device.

[Brief explanation of drawings]

FIGS. 1 to 3 show one embodiment of the present invention, and FIG. 1 is a schematic longitudinal sectional side view showing the overall structure of a daylighting device to which the present invention is applied. Fig. 2(a) is an enlarged longitudinal sectional side view showing the state in which the parabolic mirror lighting section, which is the main part of the present invention, is installed on the roof, and Fig. 2(b)
is an enlarged cross-sectional view of the main part of the lighting section. Moreover, FIGS. 3(a) and 3(b) are a plan view and a longitudinal sectional front view of this lighting section, respectively. a (3-5 near: 1-2: 2 a + ~ 12az) 2 12 b 1-12bs: 19: Room lighting device Parabolic mirror Lighting section Optical fiber Parabolic mirror Light guiding duct

Claims (1)

[Claims] 1. Lighting characterized by a configuration in which parabolic mirrors are arranged on the bottom surface of a condensing device, and an optical fiber of a type that introduces light from the side is arranged at the focal point of the parabolic mirror to introduce light. Device. 2. A clad-type optical fiber with a two-layer structure of a cladding layer and a core layer is used as the optical fiber, and the light condensing part has a rough surface with multiple holes reaching the core layer throughout the outer periphery of the cladding layer. 2. The lighting device according to claim 1, wherein the optical fiber is processed so that sunlight enters the core layer through the hole in the cladding layer of the optical fiber, while the light guide portion is left unprocessed. 3. The lighting device according to claim 1, wherein a transparent type optical fiber in which a reflective material or a fluorescent material is dispersed is used as the optical fiber. 4. A daylighting device having the structure of any one of claims 1 to 3 as one unit and arranging a required number of these units in parallel to provide daylighting with a desired illuminance.