JPS63301401A - Solar light collector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a solar light concentrator.

(Prior Art) Various methods have been proposed in the past for utilizing sunlight for indoor lighting that requires daylight. For example, as a device that uses sunlight for indoor lighting, a condensing lens or a reflecting mirror is installed on the roof of a house, and the sunlight collected by the condensing lens or reflecting mirror is transferred to a light guiding member such as an optical fiber. There is something that leads you indoors. In this case, there are a light collecting device in which a light collecting portion such as the above-mentioned light collecting lens is fixedly installed, and a mobile light collecting device in which the movement of the light collecting portion is controlled in accordance with the movement of the sun.

The fixed light condensing device uses, for example, a concave mirror as a reflector, one end face of an optical fiber is placed facing the concave mirror, and the sunlight enters the optical fiber and guides it indoors (i.e. -118805 Publication), and a system in which a light-transmitting body is provided on the wall of a house, and the sunlight that enters from the light-transmitting body is guided indoors through an optical fiber (Utility Model No. 6).
0-02204), etc.

In addition, mobile concentrators that move the concentrator to follow the movement of the sun use a condenser lens or a parabolic mirror to monitor seasonal changes in the elevation angle of the sun and the diurnal movement of the sun. It is arranged to move according to the following.

(Problems to be Solved by the Invention) Among conventional light concentrating devices, mobile light concentrating devices that follow the movement of the sun have excellent efficiency in collecting sunlight that enters the optical fiber; There is a problem in that the device inevitably becomes complicated in order to do so.

Further, a fixed light condensing device using a reflector or a condensing lens has the advantage of being simple and easy to use, but has the problem of poor light collection efficiency.

Therefore, the present invention has been made to solve the above problems, and its purpose is to have a simple configuration,
To provide a sunlight condensing device which can effectively utilize sunlight as indoor lighting and concentrates sunlight without using power to follow the sunlight.

(Means for solving problems) The present invention has the following configuration to achieve the above object.

That is, a condensing section with fisheye lenses is provided at a position such as the roof of a house where sunlight is constantly irradiated, one end surface of an optical fiber is fixed to the back of each of the fisheye lenses, and the optical fiber is installed inside the house. The feature is that the optical fiber is installed with the other end facing indoors.

(effect) Next, the operation of the present invention will be explained.

The light collecting section 10 is installed at a position such as a roof where sunlight is constantly irradiated, and the sunlight is collected by the light collecting section 10 . The concentrated sunlight enters one end surface of the optical fiber 16 placed on the back of the fisheye lens 14, passes through the optical fiber 16, and enters the room from the other end surface of the optical fiber 16 arranged toward the interior of the house. is irradiated.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[First Embodiment] FIG. 1 is an explanatory diagram showing an embodiment of a sunlight condensing device according to the present invention.

In the figure, 10 is a light condensing unit main body, which is fixedly installed on the roof 12 of a house. Reference numeral 14 denotes a fisheye lens disposed within the light condensing section main body 10. This fisheye lens 14 is composed of a plurality of lens systems. Reference numeral 16 denotes an optical fiber arranged on the back side of this fisheye lens 14 and guided into the room.

The light condensing section main body 10 supports one or more fisheye lenses 14 facing the direction of sunlight.
The lens is set to face south, and the angle between the axis perpendicular to the surface supporting the fisheye lens 14 and the vertical axis is set to be the same as the latitude of the place where this condensing device is installed. This allows sunlight to be introduced most efficiently. Reference numeral 18 denotes a mounting fitting for attaching the condensing section main body 10 to the roof.

FIG. 2 is a plan view of the condenser body 10 installed on the roof 12. As shown in the figure, a total of nine fisheye lenses 14, three in each direction, are arranged on a rectangular support plate in the condenser main body 10.

FIG. 3 is an enlarged cross-sectional view of the light condensing section main body 10. As shown in FIG. The upper surface of the condenser body 10 is covered with a glass plate 20, and 21 is a rubber gasket that clamps the peripheral edge of the glass plate 20 from above and below and fixes it to the frame 22 of the condenser body 10. Reference numeral 24 denotes a lens mounting plate disposed below the glass plate 20, on which the fisheye lens 14 is fixed at a predetermined position. 26 is a fisheye lens 14 and an optical fiber 1
This is the main body frame that stores 6 etc.

FIG. 4 shows the arrangement of the fisheye lens 14 and the optical fiber 16. 28 is a lens holder that accommodates and supports the condenser lens, and 30a, 30b, and 30c are the lens holders 2.
This is a condensing lens housed within the 8. Reference numeral 32 designates a lens holder for fixing each of the condensing lenses 30a, 30b, and 30c to the lens holder 28. The condenser lenses 30a, 3
The fisheye lens 14 consisting of 0b and 30c is designed to focus an image over a wide range of the entire sky at a focal point.

The optical fiber 16 is then attached to a fiber holder 34 provided on the lower surface of the lens holder 28.

It is fixed with a screw 37 via a fiber fixing fitting 36. The end face of this optical fiber 16 is located at the focal point of the condenser lens system below the center of the condenser lens 30c. 38 is a protection tube that protects the peripheral surface of the optical fiber 16.

Next, the operation of the above-described embodiment will be explained.

Sunlight is collected by a fisheye lens 14 made up of condensing lenses 30a, 30b, and 30c, and is incident on the end face of the optical fiber 16. Since the sun is always focused by the fisheye lens 14 no matter where it is on its travel path in the sky, the sunlight is transmitted through the optical fiber 16 regardless of the sun's travel position.
can lead to.

The sunlight entering from one end surface of the optical fiber 16 is transmitted through the optical fiber 16 and irradiated into the room from the other end, which is disposed at a predetermined position in the room.

As described above, by arranging the fisheye lens 14 in the condenser main body 10, a sufficient amount of light can be taken in by the fisheye lens 14, and since the fisheye lens 14 does not concentrate sunlight excessively, The advantage is that the condensation of light does not generate more heat than necessary.

[Second Embodiment] FIG. 5 is a front view showing a second embodiment of the solar light condensing device. This embodiment is characterized by a combination of the fisheye lens and a concave mirror. In the figure, 40 is a condensing part whose inner surface is formed into a concave mirror, and 42 is a concave mirror support fitting attached to the edge of the opening of this condensing part 40. Reference numeral 44 denotes a mounting leg that supports the side surface of the concave mirror support fitting 42 and fixes the light condensing section 40 to the installation location on the roof. Reference numerals 46a and 46b designate fixing tools such as wing nuts for adjusting the inclination angle of the condensing portion 40 and tightening and fixing the concave mirror support fitting 42 to the mounting leg 44.

Reference numeral 14 denotes a fisheye lens, which is installed by a fisheye lens support fitting 46 at a position facing the center of the light condensing section 40 so as to face the concave mirror. One end of the fisheye lens support fitting 46 is fixed to the concave mirror support fitting 42, and the fisheye lens 14 is fixed to the other end. 16 is an optical fiber connected to the fisheye lens 14. 48 is optical fiber 16
This is a fiber fixing device that fixes the fiber to prevent it from swinging due to wind, etc.

FIG. 6 is a cross-sectional view showing the internal structure of the light condensing section 40. In FIG. be. A protective glass plate stopper is provided in the shape of a narrow flange at the opening edge of the concave mirror 41, and the protective glass plate 50 is inserted between the protective glass plate stopper 52 and the glass retaining ring 55 via a packing 54. Supported by pinching. 56 is a fisheye lens mounting fitting that supports the circumferential surface of the fisheye lens 14.

When setting up this condensing device, the angle A between the central axis of the concave mirror 41 and the vertical axis is set to be the same as the latitude of the place where this condensing device is installed. This makes it possible to maximize the efficiency of sunlight.

In the condensing device of this embodiment, sunlight is reflected by the concave mirror 41, and the concentrated sunlight is captured by the fisheye lens 14. As the sun moves, concave @! Although the position where light is reflected and focused by the fisheye lens 14 is displaced,
Because it can focus light over a wide area, it can capture light regardless of the direction of the sun.

Note that the amount of light taken in is proportional to the area of the concave mirror 41, so by increasing the diameter of the concave mirror 41, the amount of light can be increased without increasing the number of fisheye lenses 14.

In each of the embodiments described above, the optical fiber 16 disposed in the fisheye lens 14 may be a single fiber, or a plurality of optical fibers may be disposed as one fiber bundle.

The present invention has been variously explained above using preferred embodiments, but the present invention is not limited to these embodiments.
Of course, many modifications can be made without departing from the spirit of the invention.

(Effects of the Invention) According to the present invention, as described above, since sunlight is concentrated by the fisheye lens, sunlight can be taken in regardless of the position of the sun, and the sunlight can be absorbed while the condensing part is fixed. Since light can be focused, there is no need for complicated equipment such as mechanisms to follow the movement of the sun, and there is no need to use electricity.

A solar light condensing device with a simpler configuration can be provided. Furthermore, since sunlight is guided into the room by optical fibers, it has the great effect of being able to be installed as lighting anywhere in the room. 4,

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the first embodiment of the solar light concentrating device according to the present invention, Fig. 2 is an explanatory diagram of the condensing cloth body, Fig. 3 is a sectional view of the concentrating cloth body, and Fig. 4 5 is a sectional view showing the arrangement of a fisheye lens and an optical fiber, and FIGS. 5 and 6 are a front view of the second embodiment and a sectional view of the condensing section. 10... Light collecting cloth body, 12... Roof, 14...
・Fisheye lens, 16...optical fiber, 18・
...Mounting bracket, 20...Glass plate, 28...
・Lens holder, 30a, 30b, 30c... Condenser lens, 34... Fiber holder, 38...
- Protective tube, 40... Light condensing section, 44... Mounting foot, 50... Protective glass plate. Figure 1 Figure 2 Figure 5 Figure 6

Claims (1)

[Claims] 1. A light collecting section with a fisheye lens is provided at a position such as the roof of a house where sunlight is irradiated, one end surface of an optical fiber is fixed to the back of the fisheye lens, and the optical fiber is introduced into the house. A solar light condensing device characterized by having the other end of an optical fiber facing indoors.