JPH07312441A - Optical power generator of high light receiving efficiency - Google Patents

Abstract

PURPOSE:To improve power generation efficiency to the layout area, by a method wherein a light receiving area is not a single surface, and a triangular photoelectric cell or a cylindrical photoelectric cell is combined with a mirror surface reflector or a reflector constituted of a photoelectric cell itself. CONSTITUTION:The title equipment consists of photoelectric cells 1 whose light receiving surfaces are not single surfaces, and reflectors. In practice, the section constituted of a direct light receiving surface 1a and reflected light receiving surfaces 1b, 1c is triangular, and the reflector itself is constituted of the photoelectric cell 1. Photoelectric cell elements are laid on the surface to be nearly cylindrical, and the reflector also is a photoelectric cell 1. In order to more increase the efficiency, at least the nearly cylindrical photoelectric cell is made possible to rotate, and a mirror surface reflector 2 having reflecting surfaces 2b, 2c to be irradiated with reflected lights is arranged. Hence the direct light receiving surface 1a of the photoelectric cell 1 receives directly the light from a light source, and the reflecting light receiving surfaces 1b, 1c receive the lights reflected from the reflecting surfaces 2b, 2c of the reflector, so that the light receiving efficiency is increased, and necessary capacity of power generation can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a photovoltaic power generation device such as a solar cell, and more particularly to a photovoltaic power generation device having high light receiving efficiency.

[0002]

2. Description of the Related Art Conventionally, there is a solar cell having a single plane, that is, a photovoltaic device in which a large number of photoelectric cells are evenly laid on a plane.

[0003]

However, in such a structure in which a single plane is uniformly laid, it is difficult to obtain a large capacity due to the low power generation efficiency of the solar cell itself. , Has the drawback of requiring a very large laying area.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a photovoltaic power generation device having a high light receiving efficiency which overcomes the above-mentioned drawbacks and improves the light receiving efficiency, that is, the required power generation capacity can be obtained even if the installation area is reduced. It is the one we are trying to provide.

[0005]

A photovoltaic device having a high light receiving efficiency is basically composed of a photoelectric cell and a reflector, each of which has a light receiving surface which is not a single plane as in the invention described in claim 1. Can be achieved.

More specifically, the means for constructing not to be a plane as in the invention described in claim 2 can be achieved by a section in which the direct light receiving surface and the two reflected light receiving surfaces are triangular. .

The present invention can also be achieved by using the photoelectric cell as the reflector itself as in the invention described in claim 3.

Further, as another specific structure, the means for forming a non-single plane as in the invention described in claim 4 has a substantially cylindrical shape in which a photoelectric cell element is laid on the surface. it can.

Further, as in the invention described in claim 5, it can be achieved by using a photoelectric cell as the reflector in claim 4.

Further, in order to further improve the efficiency, at least the above-mentioned substantially cylindrical photoelectric cell can be rotated as in the invention described in claim 6. The reflection surface 2b. A specular reflector 2 having 2c is arranged.

In this way, the photocell 1 directly receives the light of the light source (for example, the sun) as shown by the broken line on the light receiving surface 1a, and the reflected light receiving surfaces 1b and 1c are the reflecting surfaces 2b and 2c of the reflector. Since the reflected light is received, the light receiving efficiency is improved.

[0021]

[Second Embodiment] FIG. 2 is a sectional view of the essential portions of a second embodiment of the present invention, in which the reflector is also the second photoelectric cell 11. In this way, the power generated by the second photoelectric cell element 11 itself and the reflected light (shown by the broken line) are reflected by the reflected light receiving surface 1b. Since it is incident on 1c, the amount of received light is increased.

[0022]

[Third Embodiment] FIG. 3 is a cross-sectional view of an essential part of a third embodiment of the present invention. As means for preventing the light receiving surface from being a single plane, a large number of small photoelectric cell elements or films are provided. -Shaped photocells are arranged on the surface so that the cross section is cylindrical as a whole, and this cylindrical photocell 111 is formed by combining a semi-cylindrical specular reflector 22 so that almost the entire photocell can receive light. Is.

In this way, the light rays reflected by the concave surface (indicated by the broken line) in addition to the direct light can be received by almost the entire cylindrical body except for a slight dead point, so that the light receiving efficiency is improved.

[0024]

[Fourth Embodiment] As shown in FIG. 4, a combination of the cylindrical photoelectric cell 111 and the irregular reflector 23 may be used. In this way, the arrangement intervals of the cylindrical photoelectric cells 111 can be narrowed, so that it is not necessary to increase the arrangement area.

[0025]

[Fifth Embodiment] The semi-cylindrical reflector itself may be constituted by a photoelectric cell 24 as shown in FIG.
This further improves the light receiving efficiency.

[0026]

[Sixth Embodiment] By making the cylindrical photoelectric cell 111 itself rotatable, it is possible to expect power generation based on the amount of afterglow.

FIG. 6 is a block diagram showing a configuration for automatically tracking in the direction of the light source in order to obtain the maximum amount of light in each of the above embodiments. That is, A is a light source, B is a receiving circuit provided with an optical sensor with a light amount narrowing filter, C is a light receiving direction determining circuit that receives an output from the receiving circuit, D is an actuator rotation angle command circuit into which the output of the light receiving direction determining circuit is input, With this output signal, the motor actuator E
Is rotated by a predetermined angle.

[0028]

As described above, according to the present invention, since the photoelectric cell constructed so that the light-receiving surface is not a single flat surface and the reflector are combined, a large amount of power is generated with respect to the installed area, that is, the luminous efficiency is improved. A good photovoltaic device can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of an essential part of a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts of a fifth embodiment of the present invention.

FIG. 6 is a block diagram for efficiently operating each embodiment of the present invention.

[Explanation of symbols]

 1 Photocell 1a Direct light receiving surface 1b Reflected light receiving surface 1c Reflected light receiving surface 2 Chain surface reflector 2b Reflective surface 2c Reflective surface 11 Photocell also serving as a reflector 111 Photocell 22 Semicylindrical (concave) chain surface reflection Body 23 Diffuse reflector 24 Photoelectric cell A Light source B Receiver circuit C Light receiving direction discrimination circuit D Actuator rotation angle command circuit E Motor actuator

Claims (7)

[Claims] 1. A photovoltaic device having a high light receiving efficiency, which comprises a photocell and a reflector whose light receiving surface is not a single flat surface. 2. The photovoltaic power generation with good light receiving efficiency according to claim 1, wherein the means configured so as not to be a single plane is one in which the cross section composed of the direct light receiving surface and the two reflected light receiving surfaces is a triangle. apparatus. 3. The photovoltaic device with high light receiving efficiency according to claim 1, wherein the reflector itself is also composed of a photoelectric cell. 4. The photovoltaic power generation device with good light receiving efficiency according to claim 1, wherein the means for constructing not to have a single plane has a substantially cylindrical shape by laying a photocell on the surface. 5. The photovoltaic device with high light receiving efficiency according to claim 4, wherein the reflector is also a photocell. 6. The photovoltaic device according to claim 4, wherein at least the substantially cylindrical photoelectric cell is rotatable. 7. The photovoltaic device according to claim 1, wherein the photovoltaic device is configured to automatically track in the direction of the light source.