JP2869212B2 - Light power generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power generator of a Japanese tile type.

[0002]

2. Description of the Related Art There has been proposed a photovoltaic device of a Japanese tile type in which a thin-film solar cell is attached to a Japanese tile made of transparent glass. Since this power generation device is made in the same shape as Japanese roof tiles often used in Japanese houses, it is expected that it can be replaced with current roof tiles as they are.

[0003]

However, since the tile has a large curved surface, it is difficult to form a uniform thin-film solar cell on the curved surface, which causes an increase in cost.

On the other hand, it is conceivable to replace the current Japanese roof tile with a transparent glass Japanese roof tile, and at the same time, arrange a flat panel solar cell on the surface of a base plate serving as a base of the roof tile.
There is a problem that dust easily accumulates in the gap between the roof tiles of the ordinary house and the ground plate, and the light reaching the solar cell is obstructed by the dust, and the power generation efficiency is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a hakama-shaped member is provided on the back side of a Japanese tile having a curved surface made of a light transmitting material. And a flat panel solar cell is hermetically attached to the opening of the skirt.

[0006]

According to the present invention, light transmitted through a Japanese roof tile having a curved surface made of a light transmissive material reaches a flat panel solar cell, where power is generated.

[0007]

1 and 2 are a perspective view and a cross-sectional view, respectively, of a photovoltaic power generator of the present invention. Reference numeral 1 denotes a transparent glass tile, which is approximately 30 cm in height and width, having the same shape as an existing tile. It has a size of about 6 cm and a thickness of about 1 cm. Reference numeral 2 denotes a hakama-shaped body provided on the back side of the transparent glass Japanese roof tile 1, and its opening constitutes a plane. This hakama body 2 is a Japanese tile 1
It is preferable that they are formed integrally at the same time when they are formed, but they may be formed separately and then formed integrally. Reference numeral 3 denotes a flat panel solar cell which is hermetically attached to an opening formed in the plane of the skirt 2 using a caulking material 4 or the like with the light receiving surface facing the opening. The flat panel solar cell 3 includes a flat glass substrate, a stainless steel substrate, or the like, which is formed by coating an amorphous silicon thin film on a surface thereof, or a monocrystalline or polycrystalline solar cell. Used.

As described above, the photovoltaic device of the present invention has a structure in which the flat panel solar cell 3 is attached to the back side of the transparent glass Japanese roof tile 1 having the curved surface via the skirt member 2. A flat structure having a completed manufacturing process can be adopted, and excellent performance can be obtained from the viewpoint of power generation efficiency and reliability. Further, since the gap between the back side of the transparent glass tile 1 having a curved surface and the flat surface of the solar cell 3 is airtight, dust may accumulate in the gap and the power generation efficiency of the solar cell 3 may be reduced. Nor.

FIG. 3 is a sectional view showing another embodiment of the apparatus according to the present invention. The difference from the embodiment shown in FIGS. The thickness of the facing portion 5 is made thinner than the other portions, that is, the thickness of the outer peripheral portion. Specifically, as described above, the thickness of the transparent glass roof tile 1 is about 1 cm, but the thickness of the portion 5 facing the skirt member 2 is 0.5 cm or less. I have.

By partially reducing the thickness of the transparent glass Japanese tile 1 in this way, the transparent glass Japanese tile 1 can be obtained.
It is possible to reduce the amount of attenuation of sunlight reaching the solar cell 3 and to improve the power generation efficiency without impairing the mechanical strength required as described above. To describe the mechanical strength in detail, when the Japanese tile 1 is laid on the roof, a force is applied only to the peripheral part of the Japanese tile 1, and the central part,
That is, the force hardly reaches the place 5 facing the hakama-shaped body 2 of the Japanese roof tile 1. Therefore, as shown in FIG. 3, even if the thickness of the portion 5 facing the hakama-shaped body 2 of the Japanese tile 1 is made thinner than the peripheral portion, there is no problem when the roof is laid on the roof. However, when working while climbing on the roof for repair of the roof, care must be taken not to place a foot on the place 5 facing the hakama 2 of the Japanese tile 1.

FIG. 4 shows still another embodiment of the apparatus according to the present invention. In this embodiment, the inside of the place facing the hakama 2 of the transparent glass tile 1 is roughened 6. I have. With this configuration, as shown by the arrow in FIG.
, The light is diffusely reflected back to the solar cell 3 side, and as a result, the power generation efficiency can be increased.

FIG. 5 is a sectional view showing another embodiment of the device of the present invention in which the inner surface of the skirt member 2 is mirror-finished. By mirroring the inner surface of the hakama-shaped body 2 in this way, the sunlight reaching the inner surface of the hakama-shaped body 2 is reflected toward the solar cell 3 as shown by the arrow, and the sunshine wasted wastefully. Can be effectively contributed to the power generation action.

As shown in FIG. 3 for improving the power generation efficiency,
The configurations shown in FIGS. 4 and 5 are not used singly, but can be combined as appropriate, and a large power generation output can be expected in total.

[0014]

As is apparent from the above description, the present invention provides a wagama-shaped body on the back side of a Japanese roof tile having a curved surface made of a light-transmitting material, and has an opening in the hakama-shaped body. Since the flat panel solar cell is mounted airtight,
A solar cell with a flat structure whose manufacturing process has been completed can be used, a power generator with high reliability, little change over time, and high power generation efficiency can be obtained. There is no risk of dust accumulating in the gap between the back surface of the tile and the flat panel solar cell, and there is no reduction in power generation efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view of a photovoltaic device of the present invention.

FIG. 2 is a sectional view of the photovoltaic device of the present invention.

FIG. 3 is a sectional view of another embodiment of the photovoltaic device of the present invention.

FIG. 4 is a sectional view of still another embodiment of the photovoltaic device of the present invention.

FIG. 5 is a sectional view of another embodiment of the photovoltaic device of the present invention.

[Explanation of symbols]

 1 Japanese roof tile made of transparent glass 2 Hakama 3 Flat panel solar cell

Claims (4)

(57) [Claims] 1. A Japanese roof tile having a curved surface made of a light-transmitting material, a hakama-shaped body is provided on the back side of the tile, and a flat panel solar cell is provided in an opening of the hakama-shaped body. A photovoltaic device, which is mounted airtight and irradiates a solar cell with light transmitted through a curved surface of a tile to generate photovoltaic power. 2. The Japanese roof tile having a curved surface made of the light-transmitting material, wherein a portion facing the hakama-shaped body has a smaller thickness than other portions. Photovoltaic device. 3. The tile according to claim 1, wherein a back surface of the Japanese tile having a curved surface made of the light-transmitting material and facing the skirt-shaped body is roughened. Photovoltaic device. 4. The photovoltaic power generation device according to claim 1, wherein the inner surface of the skirt member is mirror-finished.