JP2001207607A - Roof structure including solar battery panels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily improve the overall appearance of a roof structure at a low cost, the roof structure including a roof surface area on which solar battery panels are laid and a roof surface area on which the solar battery panels are not laid. SOLUTION: In the roof structure including the roof surface area on which the solar battery panels are laid and the roof surface area on which the same are not laid, at least the area on which the solar battery panels are not laid is covered with color metal plates which each are colored or color-developed by a surface treatment so as to have a color tone similar to that of a surface of each solar battery panel. To this end, a chemical treatment is performed at least as part of the surface treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof structure including a region where a solar cell panel is laid on a roof surface and a region where the solar cell panel is not laid, and more particularly to a roof structure where such a solar cell panel is constructed. The present invention relates to improvement of unified aesthetic appearance of color tone and glossiness.

[0002]

2. Description of the Related Art At present, solar cell modules used for photovoltaic power generation are roughly classified into crystalline modules and thin film modules.

In a crystalline solar cell module, a glass plate (front cover glass) of the size of the module
Approximately 20 to 30 solar cells formed using a single-crystal semiconductor wafer having a small area are arranged and interconnected. The back surfaces of these single crystal cells are sealed and protected using a well-known filler such as EVA and a well-known protective film such as Tedra (registered trademark).

On the other hand, in a thin-film solar cell module (substrate-integrated module), a transparent electrode layer, a semiconductor thin-film photoelectric conversion layer, and a semiconductor thin-film photoelectric conversion layer are directly formed on a glass plate having the size of the module and also serving as a front cover glass. And a back electrode layer are sequentially stacked. These layers are divided into a plurality of cells and electrically interconnected (integrated) using vapor deposition and patterning by laser scribing, etc., so that the desired voltage and current output can be obtained. can get. For protecting the back surface of the thin-film solar cell module, the same filler and protective film as in the case of the crystalline solar cell module can be used.

[0005] Thin-film solar cell modules have the advantage that they can be easily made larger and can be manufactured at low cost, as compared with crystalline solar cell modules. For example, the dimensions and shapes of a large-area thin-film solar cell module in recent years can be manufactured, for example, with a rectangular planar shape of about 90 cm × 45 cm and a thickness of about 6 to 8 mm.

When arranging a solar panel including a solar cell module on a roof, a predetermined frame is installed on a partial area of the roof on which a tile, a slate, or the like is installed, and a plurality of solar cell panels are mounted on the frame. Conventionally, a method of fixing an array has been used.

However, in such a conventional solar cell panel installation method, only a part of the roof can be used as a power generation area, and the power generation capacity is limited. In addition, among the roof areas, the appearance of the roof is significantly different between the solar cell panel installation area and the other areas, and the problem of deteriorating the uniform appearance of a house has recently become particularly important. From such a viewpoint, in recent years, it has been attempted to construct a solar cell panel on the entire surface of the roof without constructing a tile or a slate on the roof.

[0008]

FIG. 4 is a schematic perspective view showing an example in which solar cell panels are arranged on the entire surface of a gabled roof. As is clear from this figure, since one surface of the gable roof has a rectangular shape as a whole, when the length and width of the roof surface correspond to an integer multiple of the length and width of the rectangular solar panel 10. Can cover the entire roof surface without gaps with a plurality of solar cell panels. FIG.
1 shows only eight solar cell panels 10 for clarity and simplification of the drawing, it is needless to say that more panels 10 are actually arranged.

On the other hand, FIG. 5 is a schematic perspective view showing an example of a ridge-shaped roof. One side of the ridge-shaped roof has a trapezoidal or triangular shape. As is clear from FIG. 5, the entire surface of the ridge-shaped roof cannot be covered without gaps by using only a plurality of rectangular solar cell panels 10. That is, in order to cover a trapezoidal or triangular roof surface with solar cells without gaps, generally, various triangular solar cell panels 11a, 11b, 11c and various trapezoidal solar cell panels 12a, 12b, 12c are used. , 1
Requires 2d.

On the other hand, the rectangular solar cell panel 1
If the area that cannot be covered with 0 is covered with a common roofing material such as a tile or a slate, these common roofing materials have a matte surface and a matte surface tone, so that the gloss is reduced. A feeling of strangeness is caused to the surface of the solar cell panel, and an aesthetic appearance having a uniform color tone cannot be obtained for the entire roof. Even if an attempt is made to use a coating in order to solve this problem, a coating having general weather resistance and gloss close to glass cannot be obtained by general coating. Further, even a coated metal plate having weather resistance and gloss cannot be obtained.

Under such circumstances, Japanese Patent Application Laid-Open No. H10-129
11 discloses a crystalline solar cell panel having a triangular planar shape. Also, Japanese Patent Application Laid-Open No. H10-74964.
Discloses a thin-film solar cell panel having a triangular or trapezoidal planar shape. Such planar shaped solar panels other than rectangular have the advantage that a small deformed area at the periphery of the roof surface can also be used as a power generation area, but each of the deformed solar panels is a rectangular solar cell panel. Must be specially manufactured. In addition, the shape of the roof is generally different from house to house, so that it is necessary to manufacture and prepare many types of deformed solar cell panels. Therefore, the use of such a deformed solar cell panel has a disadvantage that the disadvantage due to an increase in the manufacturing cost of the deformed panel is far greater than the benefit from the power generation amount obtained from the deformed panel.

[0012] In view of the fact that a deformed solar cell panel having a power generation capability requires high cost, Japanese Patent Laid-Open No.
No. 0-131441 discloses the use of a dummy solar cell panel including an acrylic or glass plate having a triangular or trapezoidal planar shape instead of a crystalline solar cell panel. However, a solar cell panel including such an acrylic plate or a glass plate is significantly different in appearance from a crystalline solar cell panel in which a plurality of single-crystal solar cells are arranged. Therefore, even if such a dummy solar cell panel serves to prevent rainwater intrusion, it will impair the uniform appearance of the roof of the house.

Further, the surface of the thin-film solar cell panel generally has a color similar to a glossy reddish color. However, it goes without saying that the glossiness of the color is reduced in a thin-film solar cell panel whose surface has been subjected to an antireflection treatment such as an antiglare treatment. In any case, using a dummy solar panel including a transparent acrylic plate or a glass plate in place of a thin-film-type irregular solar panel having a surface of a specific color will still damage the aesthetics of the roof. .

As shown in the schematic elevational view of FIG. 6, even if the roof has a gable shape, the length and width of one surface of the roof are substantially equal to those of the solar cell panel 10 having a rectangular shape in plan view. In the case where the length does not correspond to an integral multiple of the width and the width, relatively small rectangular dummy solar panels 13a and 13b having dimensions and shapes different from those of the rectangular solar panel 10 are required. Also, considering the power required by the house, if it is too wide to use the entire roof as a power generation area, it is desirable to replace some solar panels with dummy solar panels There is also.

In view of the above-mentioned problems in the prior art, the present invention provides a simple and low-cost unified aesthetic appearance of a roof structure including a region where solar cell panels are laid on a roof surface and a region where solar panels are not laid. It is intended to improve with.

[0016]

According to the present invention, in a roof structure including a region where a solar cell panel is laid on a roof surface and a region where the solar cell panel is not laid, a region where a solar cell panel is not laid is provided. At least a portion is covered with a color plate colored or colored by surface treatment having a color tone similar to the surface color tone of the solar cell panel.

According to the present invention, in a roof structure including a region where a solar cell panel is laid on a roof surface and a region where the solar cell panel is not laid, at least the region where the solar cell panel is not laid is a region where the solar cell panels are laid. Covered with a color metal plate colored or developed by surface treatment to have a color tone similar to the surface color tone of the panel,
It is preferable that a chemical treatment is performed as at least a part of the surface treatment.

The color metal plate colored or colored by such a chemical surface treatment can be processed into various shapes easily and at low cost, and is laid on the roof surface with the area where the solar cell panel is laid. It is possible to easily and at low cost improve the unified aesthetic appearance of the roof structure including the unoccupied area.

The solar cell panel laid on the roof may include either a single-crystal solar cell module or a thin-film solar cell module. In particular, the interval between cells in the thin-film solar cell module is narrow. In addition, the color metal plate that has been chemically surface-treated has an advantage that it easily matches the surface color of a solar panel including such a thin-film solar cell module because it has a substantially uniform monochromatic metallic luster color as a whole. .

It is preferable that a dummy solar cell panel including a color metal plate is laid on at least a part of a region where the solar cell panel is not laid on the roof surface, and at least a peripheral portion of the dummy solar cell panel is provided. It is preferable that a part has substantially the same thickness as the solar cell panel.

A dummy solar cell panel formed by using such a color metal plate can be easily formed at low cost and can be formed by processing the color metal plate at a construction site of a house roof. It is also possible. Further, the dummy solar cell panel may have the same dimensions and shape as the rectangular solar cell panel in a plan view, and have a rectangular, triangular, or trapezoidal planar shape with a different dimension and shape from the solar cell module. It is also easy to form.

As the color metal plate subjected to the chemical surface treatment, a color aluminum plate having a colored or colored anodic oxide film, a stainless steel plate colored by light interference by an oxide film having a controlled thickness, or A titanium plate can be preferably used. The outermost surface of the color metal plate may be subjected to a hard coating treatment.

When the surface of the solar cell panel has been subjected to an anti-reflection treatment so as to produce an anti-glare effect, the surface of the color metal plate is also subjected to an anti-reflection treatment so as to produce the same anti-glare effect. Is preferred.

Such an antireflection treatment of the surface of the color metal plate can be performed before or after the surface treatment for coloring or coloring is performed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some specific embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic sectional view showing an example of a dummy solar cell panel according to an embodiment of the present invention. In this dummy solar cell panel, a color metal plate 1 having a color tone similar to the color tone of the surface of the solar cell panel is used. As an example of such a color metal plate, an aluminum plate that has been subjected to anodizing treatment as a surface chemical treatment can be used. It goes without saying that the aluminum plate here includes an aluminum alloy plate. The aluminum anodic oxide coating is a very fine honeycomb-like porous coating. In such a porous coating, the color of the anodic oxide coating itself can be changed by adjusting the type of acid used in the anodic oxidation and the alloying element in aluminum. In addition, the honeycomb-shaped porous coating makes it easier to adsorb dyes and other metal ions into the porous pores, and the porous oxide coating can be sealed with hydrate to confine the coloring material. You can also. As described above, the color aluminum plate colored or colored using the anodic oxide film can have excellent weather resistance that does not cause discoloration or fading even under long-term sunlight.

Further, as the color metal plate 1, a stainless steel plate or a titanium plate on which an oxide film having a thickness controlled by a surface chemical treatment is formed can be used. An oxide film formed on the surface of a stainless steel plate or titanium plate is called a passivation film, which not only protects the underlying metal layer from corrosion but also adjusts the thickness of the film to prevent light interference of the film. Can produce various colors. For example, if an oxide film is formed on the surface of a stainless steel plate in a mixed acid solution of chromic acid and sulfuric acid, the thickness of the oxide film increases and the color tone changes to blue, gray, gold, magenta, and green. Thus, stainless steel sheets of various colors can be obtained. Further, it is possible to further perform a hardening treatment on the stainless steel plate thus colored. This hardening treatment further improves the abrasion resistance and corrosion resistance of the coloring film. For example, in a mixed acid solution of chromic acid and phosphoric acid, the hardening treatment can be performed by performing a cathodic electrolytic treatment similar to chromium plating. it can.

The periphery of the dummy solar cell panel shown in FIG. 1 is bent in a U-shape, and the thickness T of the dummy solar cell panel in the U-shaped part is substantially equal to the thickness of the solar cell panel. To be identical. This is because the method of constructing the solar cell panel on the roof can be directly applied to the dummy solar cell panel.

In FIG. 7, a typical example of installing a solar cell panel on a roof is illustrated in a schematic sectional view. In this construction method, a plurality of solar cell module support rails 21 are arranged on a roof base plate 20 in parallel with a ridge or eave. Then, the solar cell module 20 is arranged and fixed between the two parallel support rails 21. In this case, the support rail 21 has, for example, a width of about 15 mm and a height of about 35 mm as its main part, and the solar cell panel 10
Has a port for receiving one end of the That is, it is desired that the dummy solar cell panel 1 in FIG. 1 also has a thickness T that is compatible with the receptacle of the support rail 21 shown in FIG.

In FIG. 2, a dummy solar cell panel according to another embodiment of the present invention is illustrated in a schematic sectional view. In this dummy solar cell panel, the thickness member 2 is joined to the peripheral edge of the color metal plate 1.
The total thickness T of the color metal plate 1 and the thickness member 2 is substantially equal to the thickness of the solar cell panel. Such a thickness member 2 can be formed of plastic or another material. The thickness member 2 may be provided on at least a part of the peripheral portion of the color metal plate 1, but may be joined to the entire back surface of the color metal plate 1 as shown by a broken line in FIG. Needless to say.

In FIG. 3, a dummy solar cell panel according to still another embodiment is illustrated in a schematic sectional view. In this dummy solar cell panel, the periphery of the color metal plate 1 is bent into a U-shape, and the reinforcing member 3 is inserted into the portion bent into the U-shape.
Is inserted. As the reinforcing member 3, not only other metal materials but also materials such as plastic and wood can be used. Further, the reinforcing member 3 is formed not only on at least a part of a U-shaped part of the periphery of the color metal plate 1 but also on the back surface of the color metal plate 1 as shown by a broken line in FIG. Needless to say, it may be provided on the whole.

In the above embodiment, an example in which a color metal plate is used for a dummy solar cell panel has been described. However, in a roof structure according to the present invention, a color metal plate may be used in other various modes. it can.

For example, the entire surface of the roof base plate may be covered with a color metal plate, and a solar cell panel may be laid thereon. More specifically, after roofing with a color stainless steel plate having the same color tone as the surface color of the solar cell panel, an aluminum base that is anodized to a similar color is installed, and the solar cell panel is mounted on the base. The arrangement may be fixed. Further, a solar cell tile in which a thin-film solar cell is formed on an aluminum tile which is roofed by a color stainless steel plate and then anodized may be laid.

Further, when the surface of the solar cell panel is subjected to irregular reflection surface treatment so as to cause irregular reflection, it is preferable that the color metal plate is also subjected to irregular reflection surface treatment to cause similar irregular reflection. As an example of performing such irregular reflection surface treatment on a color metal plate, a surface roughening treatment such as polishing or etching such as hairline processing or sandblasting is performed before a surface treatment for coloring or coloring, followed by coloring or coloring. Chemical surface treatment. Further, a thin film that causes irregular reflection may be formed on the surface of a metal plate that has been subjected to a coloring or coloring chemical surface treatment.

Further, for example, a metal roof in which color stainless steel is tiled and rod-roofed may be formed, and an alumite-treated pedestal may be installed thereon, and a solar cell panel may be retrofitted to the pedestal. The roof may be directly covered with a solar cell tile in which a solar cell is joined to the roof.

[0036]

As described above, according to the present invention, the roof structure including the area where the solar cell panel is laid on the roof surface and the area where the solar cell panel is not laid is colored or colored by the chemical surface treatment. By using the provided color metal plate, the uniform appearance of the roof structure can be improved easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a dummy solar cell panel according to one embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a dummy solar cell panel according to another embodiment of the present invention.

FIG. 3 is a schematic sectional view showing a dummy solar cell panel according to still another embodiment of the present invention.

FIG. 4 is a schematic perspective view showing a solar cell panel arranged on a gable roof.

FIG. 5 is a schematic perspective view showing a solar cell panel arranged on a ridge roof.

FIG. 6 is a schematic elevation view showing a solar cell panel arranged on a gable roof.

FIG. 7 is a schematic cross-sectional view illustrating a typical example of installing a solar cell panel on a roof.

[Explanation of symbols]

1 color metal plate, 2 thickness members, 3 reinforcing members, 10
Rectangular solar panel, 11a, 11b, 11c Triangular solar panel, 12a, 12b, 12c, 1
2d Trapezoidal solar panels, 13a, 13b Rectangular dummy solar panels of different dimensions and shapes from rectangular solar panels, 20 roofing roof boards, 21 solar panel support rails, T Thickness of solar panels.

Claims (12)

[Claims] 1. A roof structure including a region where a solar cell panel is laid on a roof surface and a region where the solar cell panel is not laid, wherein at least a part of the region where the solar cell panel is not laid is the solar cell. A roof structure covered with a color plate colored or colored by a surface treatment having a color tone similar to the surface color of a panel. 2. A roof structure including a region where a solar cell panel is laid on a roof surface and a region where the solar cell panel is not laid, wherein at least a part of the region where the solar cell panel is not laid is the solar cell. A roof covered with a color metal plate colored or colored by a surface treatment having a color tone similar to the surface color tone of the panel, and being subjected to a chemical treatment as at least a part of the surface treatment. Structure. 3. A dummy solar cell panel including the color metal plate is laid on at least a part of a region on the roof surface where the solar cell panel is not laid, and at least a peripheral portion of the dummy solar cell panel. The roof structure according to claim 2, wherein at least a part of the roof structure has substantially the same thickness as the solar cell panel. 4. The roof structure according to claim 3, wherein the dummy solar cell panel has a different planar dimension or shape than the rectangular solar cell panel in a planar view. 5. The roof structure according to claim 3, wherein the dummy solar cell panel has a triangular or trapezoidal planar shape. 6. The color metal plate includes an anodic oxide film having a porous surface formed by the chemical treatment, wherein the anodic oxide film has a color itself or at least a part of the porous surface. 6. A color aluminum plate to which a coloring material is provided.
The roof structure according to any one of the above items. 7. The color metal plate is a stainless steel plate or a titanium plate containing an oxide film formed by the chemical treatment, and the thickness of the oxide film is controlled to a thickness that produces a desired color by light interference. The roof structure according to any one of claims 2 to 5, wherein the roof structure is provided. 8. The color metal plate according to claim 2, wherein an outermost surface of the color metal plate is hard-coated.
The roof structure according to any one of the above items. 9. The surface of the solar cell panel is subjected to an anti-reflection treatment, and the surface of the color metal plate is also subjected to an anti-reflection treatment. The roof structure according to the paragraph. 10. The roof structure according to claim 9, wherein the surface of the color metal plate is subjected to the surface treatment for coloring or coloring after an antireflection treatment is performed. 11. The roof structure according to claim 9, wherein the surface of the color metal plate is subjected to the antireflection treatment after the surface treatment for coloring or coloring is performed. . 12. The roof structure according to claim 1, wherein the solar cell panel includes a thin-film solar cell module.