JPS595223A - Solar light collector - Google Patents

Abstract

PURPOSE:To simplify the wiring of optical guides and to improve the utilizing efficiency of solar light by connecting the solar light which are focused by many pieces of lenses and are transmitted through the respective optical guies to a single photoconductor. CONSTITUTION:The solar light L focused by many pieces of lenses 111-115 are introduced into optical guides 211-215 of which the photodetecting end faces are disposed at the focuses of the respective lenses. The exit ends of the optical guides are concentrated in the central part of a lens system, and are connected in a photoconductor 22 in said central part; therefore, the solar light introduced into the respective optical guides are transmitted to desired places through the single photoconductor 22. The wiring of the optical guides is thus made easy, the entanglement of the optical guides is obviated and the cost is reduced.

Description

[Detailed Description of the Invention] Recently, we have entered an era of energy saving, and research and development is being actively conducted in various fields regarding the effective use of solar energy. is a system that directly converts solar energy into other forms of energy such as electrical energy or thermal energy.
It is used as light energy. The applicant is
From the above-mentioned perspective, solar energy is focused using a lens, etc., and guided into a light conductor cable, transmitted to the place where illumination is needed, and used for indoor lighting, etc.
Various proposals have been made regarding sunlight collecting devices. The present invention was made as part of this effort.Basically, sunlight is focused by a large number of lenses whose direction moves according to the movement of the sun, and a light-receiving surface is arranged opposite to each lens. At the same time, the multiple light guides are connected to a single light guide, and the sunlight transmitted through the multiple light guides is optionally transmitted through the single light guide. It relates to a sunlight collecting device that transmits light to a desired location, and in particular, the arrangement of the multiple light guides should be considered so as to be able to standardize the light guides, thereby facilitating the production of the light guides and making it possible to The cost of the light guide can be reduced, and the tracking operation of the lens can be facilitated, or sunlight that has not been focused by the lens can be introduced into the light guide or light guide, thereby increasing the solar light collection efficiency. The aim is to improve the

FIG. 1 is a perspective view for explaining an example of a sunlight collecting device previously proposed by the present applicant. In the figure, 1 is a cylindrical base, 2 is a transparent dome-shaped (These constitute a capsule 3 for a solar collector, and in use, the solar collector 10 is placed inside the capsule 3 as shown in the figure.)
is accommodated.

This sunlight collecting device 10 includes a large number of concentrically arranged lenses 11, for example, 19 lenses, for concentrating sunlight.
〜”19. A sunlight direction sensor 12 for detecting the direction of the sun, a support frame 13 for holding these in one body, a first motor 15 for rotating these in the direction of arrow A,
The lens 11□~ ] 1.9 to a support arm 16 that supports the motor 15, a rotating shaft 17 disposed perpendicular to the rotating axis of the motor 15, and rotating the rotating shaft 17 in the direction of arrow B. It has a second motor (not shown), etc.,
The direction of the sun is detected by the sunlight direction sensor 12, and the lens 11. ~1]1. The first and second motors are controlled so that the lenses II, ~111. The sunlight focused by The information can be transmitted to any desired location.

Therefore, in the conventional solar power collecting device as described above, a large number of optical conductor cables arranged facing each lens are extended as they are to each usage location. , the optical conductor cables may become entangled with each other, or the optical conductor cables may become wrapped around the rotating shaft, making installation work and subsequent maintenance management of the optical conductor cables difficult. Because of this, there were drawbacks such as high cost. Furthermore, not all of the sunlight focused by the lens is introduced into the optical conductor cable, and the focal image of sky light is too thick to be introduced into the optical conductor cable. There were also drawbacks such as a decrease in the efficiency of collecting sunlight.

The present invention was made in order to solve the drawbacks of the prior art as described above, and in a solar light collection device that collects sunlight using a large number of lenses as described above, It is possible to simplify the wiring of the installed light guide and standardize the optical guide, thereby facilitating the installation work of the light guide and reducing the cost of the light guide. , a condensing reflector plate is provided on the back side of the lens system consisting of a large number of lenses, and the condensing reflector plate collects sunlight that is not collected by the lens and introduces it into the light guide. , thereby making it possible to improve the utilization efficiency of sunlight.

FIG. 2 is a schematic side sectional view of the main parts for explaining one embodiment of the solar light collection device according to the present invention, in which 14 is a first rotating shaft rotated by a first motor 15; 18 is a second motor for rotating the second rotating shaft 17; 11;
1 to 115 are lenses, and these lenses 111 to 1
15 corresponds to the lenses 11□ to 11° shown in Fig. 1, and the sunlight focused on these lenses by -11, to 115 is connected to a light guide whose light-receiving end surface is placed at the focal point of each lens. 211-21. be introduced within.

FIG. 3 is a schematic configuration diagram of a lens system consisting of a large number of lenses as described above, viewed from the back side, and in the illustrated example,
Nineteen lenses consisting of 111' to 1119 are arranged approximately concentrically, and a light guide 21, to 21 is located at the focal point of each lens.
1. The light-receiving end face of each party guide is arranged, and the light-emitting end of each party guide is concentrated at the center of the lens system as shown, connected within the light guide 22 at the center, and guided through the light guide 22 to any desired location. transmitted and used for illumination or other purposes at any desired location. In this manner, according to the present invention, the sunlight focused by the plurality of lenses 11, to 11□, passes through the light guide 2 disposed opposite to each lens.
]1-211. However, each light emitting end side of each light guide is gathered at the center of a substantially concentric circle formed by a large number of lenses, and connected to a single light guide 22 at the center, so that each light beam is The sunlight introduced into the guide is transmitted to any desired location through the single light guide 22, making the wiring of the light guide very easy. This makes it possible to reduce the cost of the light guide.Furthermore, as will be described later, it becomes possible to standardize the dimensions of the light guide, and the production and production of the light guide becomes possible. Casting work becomes easier.

That is, FIG. 4 is an enlarged side sectional view of part A shown in FIGS. 2 and 3 (cross-sectional view taken along the +V-tV line in FIG. 5),
The figure is a sectional view taken along the line v-v in FIG. 4, and as shown, each light guide 21. ~21□, are collected in the center of the lens system and connected to the light guide 22 at the center, with each party guide 21□~21□ being connected to each light guide 21 □ ~211. The lenses 11. are arranged to face each other. ~11□, in relation to (light guide 2] 1
~210. The suffixes 1 to 19 indicate lens 111, respectively.
~111. (corresponding to the suffix numbers 1 to 19) are arranged approximately concentrically, for example, the lens 1 in the center]
The light guide 2]3 facing 3 is at the center, and the outer lenses 111□, 116, llo, I are located on the inner concentric circle.
I, , , 1118.11 □6 facing light guide °2
11□, 216.21g, 2] 11.2119.21
16 are arranged concentrically, and the lenses "12.116.11G, 1111% 1" are arranged on the outside of each of them.
119.1116, the lenses 11, 3.
11□, 118, ]14.1117.2 light guides facing 1115, 21□, 218.2]4.2+1.
．． 2], 5 are arranged, and lenses 11□,
l17.11□. , 115.118.1114, the light guides 218.21, . 21. . , 215.21
．． ．． 21.4 are arranged to form approximately concentric circles.

With this configuration, the light guide 21. 21. 21
0.21. ,．． 2]1. ．． 21□6 is the same as 12
6 The same dimensions and the same shape are sufficient, and similarly, the light guide'≧do2]13
．． 21.21.21.21.21 also have the same dimensions, the same 2 8 4 17
15 shape may be used, and furthermore, 21.217.2
] 1o121.218, 5 21 may also have the same dimensions and the same shape; in the case of the illustrated example,
4 Substantially, it is sufficient to standardize and prepare three types of light guides, and the production and installation of the light guides are easy, and the connection with the light guide n is easy, and the light guides can be arranged in an orderly manner. There is no risk that they will become entangled or wrap around the rotating shaft. Furthermore, if the other end of the single light guide η to which a large number of light guides are connected as described above is disposed coaxially with the first rotating shaft 14 as shown in FIG. light guide n
In contrast, the first rotation shaft 14 is free to rotate, and the light guide 22 is passed through the support arm 16 to the second rotation shaft 1.
7, the second rotating shaft 1
7 also becomes free to rotate with respect to the light guide 22, making it easier for the lens system to follow the movement of the sun. However, as mentioned above, when trying to introduce sunlight focused by a lens into a light guide, it is very difficult to introduce all the light focused by a lens into the light guide, and sky light Because the focal image is inherently large and, in practical terms, larger than the area of the end face of the light guide, it is difficult to introduce sky light into the light guide, and in this way, there is light that is not introduced into the light guide. This will inevitably lead to a decrease in solar power collection efficiency. The present invention also aims to provide a sunlight collecting device that can effectively collect and utilize light that is not introduced into the light guide due to the reasons described above.
Specifically, as shown by reference number (9) in FIG.
Lenses 11□-11□9 and light guides 21□-2110
A light condensing reflector plate I having a focal point on the center line of the light guide n is provided on the back side of the space formed by the light guide n, and the light not introduced into the light guide is reflected between the light condensing reflectors and the light guide It was designed so that it could be effectively introduced within the country.

That is, as mentioned above, FIG. 4 is an enlarged side sectional view of section A shown in FIGS. 2 and 3, and FIG.
In the v-line cross-sectional view, the light guides 21□ to 2119 are gathered in a substantially concentric circle at the center of the lens system and connected to the light guide 22. At this time, each of the light guides 211 to 21.9 is They are arranged at an angle that allows the reflected light from between the reflectors to be introduced, and the light that is not introduced into the light guide by the lens is condensed by the condensing reflector plate and introduced into the light guide. be done. In this way, according to the present invention, sunlight that is not introduced into the light guide depending on the lens system can also be focused using a reflector and introduced into the light guide, thereby: Solar power collection efficiency can be improved. Note that the light guide 22 is wired through the boundary between lenses as shown by the dotted line in FIG.
If the end thereof is aligned with the rotation axis 14 of the lens system as shown in FIG. 2, the light guide 22 will not cast a shadow on the lens surface. Also, in the above explanation,
Lens 11 in the center. However, in reality, it is better to omit this lens 113, and in that case, the center portion of the light guide 22 may be used in place of the light guide 213.

As is clear from the above description, according to the present invention, there is provided a plurality of sunlight focusing lenses, and sunlight focused by the lenses is introduced into a light guide disposed opposite to each lens. In the solar light collecting device, the guides for each party can be arranged in an orderly manner, and each light guide can be standardized, making the work of arranging the light guides easier. By making it possible to use a rondo, the cost of the light guide can be reduced, and furthermore, these multiple light guides can be connected to a single light guide, and each light guide can be transmitted by 3 m. Since the incoming sunlight is transmitted to any desired location through the single light guide, the installation work is easy and the cost can be reduced. By arranging the light guide coaxially with the rotation axis, the rotation axis that allows the lens surface to follow the direction of the sun is free to rotate.

Furthermore, by providing a condensing reflector on the back side of the space formed by a large number of lenses and a large number of light guides, some of the lenses may not be able to enter the light guide. This has advantages such as the ability to introduce light into the light guide, thereby improving the solar light collection efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic overall configuration diagram for explaining an example of a sunlight collecting device to which the present invention is applied, FIG. 2 is a side sectional view of main parts for explaining an embodiment of the present invention, Figure 3 is a back view of the lens and light guide section, Figure 4 is a diagram of Figures 2 and 3.
The enlarged side cross-sectional view of part A shown in the figure, FIG.
-V line sectional view. 3...Capsule, 10...Solar collector, 11, ~1
11°...Lens, 211 to 21□, Optical fiber, 22 Light guide, focusing plate. Figure 1 0 Figure 3 Figure 4 Figure 5

Claims (6)

[Claims] (1) A large number of lenses arranged substantially concentrically to focus sunlight, a sensor to detect the direction of the sun, and a lens provided opposite to each of the lenses and facing each other. a plurality of light guides into which focused sunlight is introduced; a single light guide to which the plurality of light guides are connected and into which sunlight transmitted through each party guide is introduced; a first rotation axis that rotatably supports a lens and a member integrally configured with the lens; a support arm that supports the first rotation axis; and an axis that extends the support arm orthogonally to the first rotation axis. and a second rotating shaft rotatably supported by the lens, and the sensor detects the direction of the sun and rotates the first rotating shaft and the second rotating shaft so that the light-receiving surface of the lens is aligned with the sun. In the sunlight collection device, the sunlight focused by the lens is introduced into the light guide by controlling the lens to face in the direction of A solar collector, characterized in that it is arranged face-to-face and connected to said single light guide. (2) one end of the light guide is arranged approximately at the center of a concentric circle formed by the plurality of lenses and connected to the plurality of light guides, and the other end is arranged coaxially with the first rotation axis; Claim No. 1 (1) characterized in that
) The solar light collecting device described in paragraph (3) The sunlight collecting device according to claim (2), wherein the light guide further passes through the support arm and is disposed coaxially with the second rotation axis. (4) a light guide including a large number of lenses arranged substantially concentrically and a light-receiving end face arranged at the focal position of each lens;
a single light guide to which the light-emitting end surfaces of each light guide are connected; and a condensing reflector plate disposed on the back side of the space containing the plurality of lenses and the light guide, and the light-emitting end of the light guide The light guide is arranged along the lens surface at the center of the substantially concentric circles, and is connected to the single light guide, and at least near the center, the light guide has no cladding layer. Features of solar collection device. (5) The sunlight collecting device according to claim (4), wherein the focal point of the condensing reflector is on the center axis of the substantially concentric circles. (6), wherein each of the light guides is connected to the single light guide in a substantially concentric manner in relation to each of the lenses; The solar light collection device described in section.