JPH11183838A - Sunshine converging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the system simple and low-cost and to reduce the maintenance cost without requiring any driving part by converging the sunshine according to time in a day and as the seasons change irrelevantly to variation in the azimuth and altitude of the sun. SOLUTION: The sunshine (a) is made incident on a hemispherical convex lens 1 which has a reflecting mirror 2 on its bottom surface, reflected by the reflecting mirror 2, and converged and emitted by the convex lens 1. The sunshine (b) is guided to a conic photodetection part 3 having a reflecting mirror as its internal surface, an end 4 of an optical fiber on the axis is positioned at the focus of the convex lens 1, and the sunshine (a) is converged on the end 4. On the track where the position converged on the focus moves according to variation in the sun altitude and azimuth in a day, plural photodetection parts 3 corresponding to about every hour are provided laterally in an arcuate shape. For variation in the sun altitude depending upon the seasons, photodetection parts 3 are provided in an upper array for summer, in an intermediate array for spring and autumn, and in a lower array for winter. The optical fibers of the respective photodetection parts 3 are bundled in one and the sunshine is transmitted by the optical fiber cable 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for effectively utilizing sunlight, which is one of natural energy, and more particularly, to an apparatus for controlling sunlight according to changes in azimuth and altitude due to the operation of the sun. The present invention relates to a device for focusing.

[0002]

2. Description of the Related Art Conventionally, as a solar beam focusing apparatus of this type, as shown in FIG. 2, an incident light beam a is focused on a solar beam b by a convex lens 6 such as a Fresnel lens with the sun facing the front, and an optical fiber is focused at the focal point. This is a device that transmits the sun rays through an optical fiber cable 8 with a set having one end 7 placed, but in order to always position the convex lens in front of the sun,
Although not shown in FIG. 2, a system in which a drive unit controlled by a computer is further added to this device and a device corresponding to a change in azimuth and altitude due to the operation of the sun is added is commercially available.

[0003]

In order to focus the sun rays on a convex lens such as a Fresnel lens, the sun rays are always focused toward the front of the sun and the light is focused on the focus. Since it consists of a set with one end of the fiber, it requires a complicated drive by computer control to respond to changes in the direction and altitude due to the operation of the sun, and has problems such as price and maintenance. Was.

[0004]

The conventional method of focusing a solar ray by always positioning a convex lens in front of the sun and placing one end of an optical fiber at the focal point is the same, but does not require a complicated driving device. In addition, a device has been devised that can focus sunlight rays falling on the ground following the time and seasonal shift of the day, regardless of changes in azimuth and altitude due to the operation of the sun.

That is, the convex lens is not a planar lens such as a Fresnel lens, but a hemispherical three-dimensional convex lens having a reflecting mirror on the bottom surface, so that the focal point is always constant irrespective of changes in the azimuth and altitude due to the operation of the sun. I tied it.

However, the focal point of a hemispherical convex lens is
During the day, it moves in an arc according to the direction and altitude changes due to the operation of the sun.

In response to the movement of the focal point, the end of the optical fiber is set on the trajectory of the focal point so that the concentrated sunlight does not directly enter the end of the optical fiber but is incident by the internal reflecting mirror. A plurality of substantially conical light receiving portions provided above are arranged in an arc shape in the horizontal direction.

On the other hand, the altitude of the sun changes at the same time depending on the season, and the position of the focal point goes up and down. Therefore, a plurality of light receiving sections are provided in the vertical direction to form a honeycomb.

When a plurality of optical fibers from these light receiving sections are bundled together, sunlight can be transmitted in the same manner as an optical fiber cable of a conventional device.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Sunlight is made incident on a hemispherical convex lens having a reflecting mirror on the bottom surface, is reflected by the reflecting mirror while converging, and is emitted from the convex lens in the opposite direction.

The reflecting mirror need not be placed horizontally, but may be appropriately inclined depending on the latitude of the area where the device is installed.

[0012] The sunlight emitted while focusing is
The inner surface is guided to a substantially conical light-receiving portion formed as a reflecting mirror, and the end of the optical fiber on the axis thereof is positioned near the focal point of the convex lens, and the sunlight rays incident on the convex lens are focused on the end of the optical fiber.

In this case, even if the converged sunlight does not directly enter the end of the optical fiber, since the inner surface of the substantially conical light receiving portion is a reflecting mirror, it enters the end of the optical fiber by reflection.

During a day, the altitude and azimuth of the sun change every moment due to the rotation of the earth, and the position condensed at the focal point moves accordingly. It is provided in an arc shape in the horizontal direction.

On the other hand, the altitude of the sun changes according to the seasons due to the revolution of the earth, and the position of the focal point fluctuates even at the same time. Therefore, a plurality of light receiving portions are further provided in a vertical direction to form a honeycomb.

These optical fibers are made into an optical fiber cable bundled.

With this optical fiber cable, as long as the sun shines on the hemispherical convex lens, the sun's rays can always be transmitted irrespective of changes in azimuth and altitude due to the operation of the sun.

[0018]

An embodiment will be described with reference to FIG.

A hemispherical convex lens 1 having a reflecting mirror 2 on the bottom surface
Is reflected by the reflecting mirror 2 and emitted while being focused by the convex lens 1.

The sunlight ray b emitted while being converged by the convex lens 1 is converted into a substantially conical light receiving section 3 having an inner surface as a reflecting mirror.
And the end 4 of the optical fiber on its axis is
And focus the sunlight a to the end 4 of the optical fiber.

On a trajectory in which the position focused on the focal point moves according to changes in the altitude and azimuth of the sun during a day, a plurality of light receiving sections 3 corresponding to each hour are formed in a circular arc shape in the horizontal direction. Provide.

On the other hand, in response to seasonal changes in the altitude of the sun, the uppermost row is for summer and the middle row is for spring and autumn.
The bottom row is provided with three rows of light receiving sections 3 for the winter season in a honeycomb shape.

An optical fiber is bundled in each light receiving section, and sunlight is transmitted by the optical fiber cable 5.

In this way, the device of the present invention does not require any driving parts, so that the time of day and the season

[0026]

Since the present invention is configured as described above, the following effects can be obtained.

Regardless of the change in the direction and altitude due to the operation of the sun, the sun rays falling on the ground can be focused on following the transition of the time and season of the day without the need for a driving part.

Since no driving parts are required, the system itself is simplified, the production costs are reduced, and the maintenance costs are also reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram corresponding to an embodiment of the present invention.

FIG. 2 is an explanatory diagram corresponding to an apparatus according to a conventional technique.

[Explanation of symbols]

a Incident light rays from the sun b Converged sunlight rays by a convex lens 1 Spherical convex lens 2 Reflector mirror on the bottom surface of the spherical convex lens of 1 3 Conical light receiving section with a reflecting mirror on the inner surface 4 End of optical fiber in light receiving section of 3 5 Optical fiber cable for transmission 6 Planar convex lens mounted on prior art device 7 End of optical fiber in light receiving portion mounted on prior art device 8 Inside light receiving portion mounted on prior art device Fiber optic cable

Claims (1)

[Claims] 1. A solar ray a is made incident on a hemispherical convex lens 1 having a reflecting mirror 2 on the bottom surface, and a solar ray b emitted from the convex lens 1 while being reflected by the reflecting mirror 2 is focused on the inner surface. Is guided to the substantially conical light-receiving section 3, the end 4 of the optical fiber on the axis thereof is positioned near the focal point of the convex lens, and the sunlight a incident on the convex lens 1 is focused on the end 4 of the optical fiber. During the day, the altitude and azimuth of the sun change every moment due to the rotation of the earth, and the position condensed at the focal point moves accordingly. Direction, and the altitude of the sun changes according to the season due to the revolution of the earth, and the position of the focal point fluctuates even at the same time. Therefore, a plurality of light receiving units 3 are further provided in the vertical direction, These lights are arranged in a beehive and curved The optical fiber cable 5 is formed by bundling the fibers into a single optical fiber cable. The optical fiber cable 5 is capable of transmitting the sun's rays. A solar beam concentrator that focuses the sun rays falling on the ground following the transition.