JP7401325B2 - roof structure - Google Patents

Description

The present invention relates to a roof structure including a solar cell module.

Solar cell modules that convert sunlight energy into electrical energy are sometimes installed on the roofs of buildings such as houses and factories. Such solar cell modules are installed on the roof using appropriate fixtures depending on the type of roofing material. In Patent Document 1 below, a solar cell module is installed on a folded plate roof.

In Patent Document 1, a mounting bracket (fixing fixture) is attached to a seam of a folded-plate roof. The mounting bolt protrudes upward from the mounting bracket. A mounting device and a fixing plate are attached to the mounting bolts. The end of the solar cell module is sandwiched between the mounting tool and the fixing plate. Thereby, the solar cell module is fixed by the mounting tool and the fixing plate.

Further, in Patent Document 1, a channel material (crosspiece material) is provided between the mounting tool and the fixing plate as necessary. The channel material extends along one direction. The mounting tool and the fixing plate are configured to be attachable at any position on the channel material.

Japanese Patent Application Publication No. 2015-154584

Manufacturers who manufacture solar cell modules are generally different from manufacturers who manufacture roofing materials that constitute roof structures. Therefore, solar cell modules are usually not designed according to the type and shape of the roofing material, nor are roofing materials designed according to the size and shape of the solar cell module. As described above, solar cell modules are installed on a roof using appropriate fixing devices depending on the type and shape of the roofing material.

Here, depending on the type and shape of the roofing material, there are restrictions on the arrangement of the fixtures for the solar cell module. In particular, in the case of a roof with a plurality of protrusions extending in one direction, such as a folded-plate roof, the installation position of the fixture may be limited to the position of the protrusions of the folded-plate roof. Therefore, it may also be difficult to arrange a plurality of solar cell modules in an integrated manner.

As described in Patent Document 1, a crosspiece may be provided on the roof in order to flexibly change the installation positions of the mounting device and the fixing plate. However, the use of additional crosspieces increases the time required to install the solar cell modules and increases the load on the roofing material.

Therefore, a roof structure including a solar cell module is desired, which can reduce the load on the roof material while facilitating the construction of the solar cell module.

The roof structure according to one embodiment includes a solar cell module, a roof including a plurality of convex portions extending in a first direction and arranged in a second direction intersecting the first direction, and and a plurality of fixing devices for fixing the battery module to the convex portion of the roof. Each of the fixtures supports at least an end of the solar cell module in the second direction. The length of the solar cell module is shorter in the second direction than the first distance between the centers of the convex portions where the fixtures for fixing the solar cell module are installed, and the length of the solar cell module is The distance is longer than the second distance between the protrusions on which the fixing tools to be fixed are installed.

According to the above aspect, it is possible to reduce the load on the roofing material while facilitating the construction of the solar cell module.

FIG. 1 is a schematic plan view of a roof structure including a solar cell module according to a first embodiment. FIG. 2 is a side view of the roof structure viewed from the direction of arrow 2A in FIG. 1. FIG. It is a perspective view of a solar cell module. 3 is an enlarged view of region 3A in FIG. 2. FIG. FIG. 2 is a perspective view of the base of a fixture according to one embodiment. 4 is a schematic cross-sectional view of the solar cell module taken along line 6A-6A in FIG. 3. FIG. FIG. 7 is a schematic plan view of a roof structure including a solar cell module according to a second embodiment.

Embodiments will be described below with reference to the drawings. In the following drawings, the same or similar parts are designated by the same or similar symbols. However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one.

(First embodiment)
FIG. 1 is a schematic plan view of a roof structure including a solar cell module. FIG. 2 is a side view of the roof structure viewed from the direction of arrow 2A in FIG. FIG. 3 is a perspective view of the solar cell module. FIG. 4 is an enlarged view of region 3A in FIG.

In this embodiment, the roof structure may include a solar cell module 100, a fixture 200, and a roof 300. Preferably, the roof structure includes a plurality of solar modules 100, as shown in FIG.

In this embodiment, the roof 300 may have a wave-like curved or bent shape in one direction. Specifically, the roof 300 includes a plurality of convex portions 310 extending in a first direction (the Y direction in the figure; the same applies hereinafter). The plurality of convex portions 310 are lined up in a second direction (X direction in the figure; the same applies hereinafter) intersecting the first direction. An example of such a roof 300 is a metal roof such as a folded plate. In the example shown in FIGS. 2 and 4, the roofing materials forming the roof 300 are engaged with each other at the seam portion 320 of the convex portion 310. In the example shown in FIGS.

Fixture 200 fixes solar cell module 100 to convex portion 310 of roof 300 . In this embodiment, the fixture 200 is attached to a convex portion 310 of the roof 300. As an example, the fixture 200 is attached to a bulge 320 provided on the convex portion 310. Each fixture 200 supports an end of the solar cell module 100 and both ends of the solar cell module 100 in the second direction.

Note that in this embodiment, the convex portion 310 is a convex region of the roof 300, and means a generally flat region that can be contacted by a leg portion 214 of a fixture 200, which will be described later. In the example shown in FIG. 4, the convex portion 310 includes an upwardly directed surface 312 and corresponds to a region R1 between the boundaries between the surface 312 and the downwardly inclined region 314.

In the example shown in FIG. 1, the plurality of solar cell modules 100 are lined up along both the first direction and the second direction. Alternatively, the plurality of solar cell modules 100 may be arranged along either the first direction or the second direction.

Solar cell module 100 may have a substantially rectangular shape when viewed from a direction perpendicular to the light receiving surface. Here, the light-receiving surface means the surface of the solar cell module 100 on the side that receives sunlight. Solar cell module 100 may include a pair of long sides 102 and a pair of short sides 104.

Each solar cell module 100 may include a panel section 110 and a frame 120 provided at an end of the panel section 110 (see FIG. 3). The panel section 110 may include a photoelectric conversion element that converts solar energy into electrical energy. The frame 120 may be provided on each side of the panel section 110. In this embodiment, the frame 120 surrounds the panel section 110.

The length L3 of the solar cell module 100 is shorter in the second direction than the first distance L1 between the centers of the protrusions 310 on which the fixtures 200 for fixing the solar cell module 100 are installed. In addition, in one example, the first distance L1 corresponds to the distance between the centers of the bulge portions 320 of the convex portion 310 on which the fixture 200 is installed. Furthermore, the length L3 of the solar cell module 100 is longer in the second direction than the second distance L2 between the protrusions 310 on which the fixtures 200 for fixing the solar cell module 100 are installed.

Thereby, both ends of the solar cell module 100 in the second direction are located on the convex portion 310 on which the fixture 200 is installed (see FIGS. 2 and 4). Therefore, the solar cell module 100 can be attached to the roof 300 using the small and simple fixture 200 attached to the convex portion 310. In particular, the solar cell module 100 can be fixed by the fixing device 200 locally installed on the convex portion 310 of the roof 300 without using a column member or frame having a length extending over the edge of the solar cell module 100. (see especially FIG. 4). As a result, compared to the case where a column member such as a crosspiece or a frame is used, construction of the solar cell module 100 becomes easier, and the load on the roof 300 can also be reduced.

The length L3 of the solar cell module in the second direction may be a value obtained by subtracting preferably a range of 10 mm to 50 mm, more preferably a range of 18 mm to 30 mm, from the above-mentioned first distance L1. Thereby, a plurality of solar cell modules 100 can be arranged as densely as possible while ensuring a gap for arranging fixtures 200 between solar cell modules 100 adjacent to each other in the second direction.

Here, when the roof 300 is a folded plate roof as shown in FIGS. 1 and 2, the distance (pitch) P1 between the centers of the convex parts 310 adjacent to each other in the second direction is the same as that of most folded plate roofs. , the value is about 333 mm or about 500 mm. Therefore, the length L3 of the solar cell module 100 in the second direction may be a value obtained by subtracting an integral multiple of 333 mm or 500 mm, preferably in the range of 10 mm to 50 mm, and more preferably in the range of 18 mm to 30 mm. Thereby, both ends of the solar cell module 100 in the second direction can be positioned on the convex portion 310 of the roof.

More specifically, the length L3 of the solar cell module 100 in the second direction may preferably be in the range of 950 mm to 990 mm, more preferably in the range of 970 mm to 982 mm. In this case, regardless of whether the solar cell module 100 is installed on a folded plate roof where the distance between the centers of the convex portions 310 adjacent to each other in the second direction is 333 mm or on a folded plate roof where the distance is 500 mm, the sun Both ends of the battery module 100 in the second direction are located on the convex portion 310 of the roof 300. Therefore, the solar cell module 100 can be installed on most folded plate roofs using the small and simple fixture 200.

Solar cell module 100 may be arranged such that a pair of long sides 102 extend along the first direction. In this case, fixture 200 supports both ends of solar cell module 100 in the second direction. This reduces the dead weight applied to the center of the solar cell module 100 in the second direction, so that the fixture 200 can support the solar cell module 100 more stably. Alternatively, the solar cell module 100 may be arranged such that the pair of short sides 104 are along the first direction, and the fixtures 200 may support both ends of the solar cell module 100 in the second direction.

The structure of fixture 200 is not particularly limited as long as it can support solar cell module 100. Preferably, the fixture 200 is located locally on the protrusion 310 of the roof 300.

FIG. 5 is a perspective view of the base of a fixture according to one embodiment. The base portion 210 may include a loading portion 212 that supports the load of the solar cell module 100 from below, and a leg portion 214 that contacts the convex portion 310 of the roof 300. The leg portions 214 correspond to portions that support the loads of the solar cell module 100 and the fixture 200.

In this embodiment, the base 210 may have a pair of loading parts 212 adjacent to each other in the second direction in order to support the solar cell modules 100 adjacent to each other in the second direction. An end portion of the solar cell module 100, for example, a frame 120, is loaded on a pair of loading portions 212. In this case, the fixture 200, specifically the flange member 220, is located between the solar cell modules 100 adjacent to each other in the second direction.

In this embodiment, the base 210 is configured to be able to hold the bulge 320. Specifically, the base 210 includes a pair of parts that are configured to be able to swing relative to each other when the fastening member 230 is loosened. A gap is formed between these pair of parts to sandwich the joint part 320 therebetween. By fastening the aforementioned pair of parts constituting the base 210 to each other using the fastening member 230, the base 210 sandwiches the joint part 320.

The flange member 220 has a pair of pressing parts 222 that press the ends of the solar cell modules 100 adjacent to each other in the second direction toward the loading part 212 from above. A plate portion 224 having a hole through which a fastening member 240 for fastening the flange member 220 to the base portion 210 passes is provided between the pair of pressing portions 222 . The flange member 200 is fastened to the base 210 by a fastening member 240 provided between the solar cell modules 100 adjacent to each other in the second direction.

When the fastening member 240 fastens the base portion 210 and the flange member 220 to each other, the end portion of the solar cell module 100 is sandwiched between the loading portion 212 and the pressing portion 222. In this way, some of the plurality of fixtures 200, specifically, the fixtures 200 located between the solar cell modules 100 adjacent to each other in the second direction, Both battery modules 100 are supported.

It is preferable that the loading section 212 is provided at a position overlapping the leg section 214 when viewed from a direction perpendicular to the surface of the solar cell module 100. Further, it is preferable that the loading section 212 is provided within a region that does not protrude from the leg section 214 in the second direction. As a result, the leg portion 214 is positioned directly under the load of the solar cell module applied to the loading portion 212, so that the force in the rotational direction with the contact point between the leg portion 214 and the convex portion 310 as a fulcrum is applied to the fixture 200. It becomes difficult to get infected. Therefore, the solar cell module 100 can be supported more stably.

Further, in order to maintain the force of sandwiching the end portion of the solar cell module 100 between the loading portion 212 and the pressing portion 222, the diameter of the threaded portion of the fastening member 240 is preferably about 8 to 12 mm, for example. Considering that the flange member 220 is fastened to the base 210 using the fastening member 240 of such a size, it is preferable that the gap between the solar cell modules 100 adjacent to each other in the second direction is 18 mm or more. .

On the other hand, in order to ensure that the loading portion 212 is placed on the convex portion 310 of the roof 300, the gap between adjacent solar cell modules 100 in the second direction should be 30 mm or less. preferable. From these viewpoints, as described above, the length L3 of the solar cell module 100 in the second direction is more preferably a value obtained by subtracting the range of 18 mm to 30 mm from the first distance L1 described above. Thereby, the plurality of solar cell modules 100 can be arranged as densely as possible in the second direction while ensuring a gap for arranging the fixture 200 between the solar cell modules 100 adjacent to each other in the second direction.

Further, when a plurality of solar cell modules 100 are lined up in the first direction, the distance between the solar cell modules 100 that are adjacent to each other in the first direction is the distance between the solar cell modules 100 that are adjacent to each other in the second direction. It may be shorter than the distance of This is because fixtures 200 are not required between solar cell modules 100 adjacent to each other in the first direction.

Next, an example of the configuration of the panel section 110 of the solar cell module 100 will be described using FIG. 6. FIG. 6 is a schematic cross-sectional view of the solar cell module taken along line 6A-6A in FIG.

The panel section 110 includes the photoelectric conversion element 10 , a first substrate 600 provided on the light-receiving surface side of the photoelectric conversion element 10 , and a sheet-like protection provided on the opposite side of the first substrate 600 with respect to the photoelectric conversion element 10 . material 900.

The first substrate 600 may be exposed on the light receiving surface side. The first substrate 600 may be a transparent or semitransparent substrate such as a resin substrate or a glass substrate.

The panel section 110 may have a first sealing layer 400 between the first substrate 600 and the photoelectric conversion element 10. The first sealing layer 400 may cover at least the surface side of the photoelectric conversion element 10.

The first sealing layer 400 may be made of a transparent or semitransparent insulator. For example, the first sealing layer 400 may be made of synthetic resin. As such a synthetic resin, for example, EVA resin (ethylene/vinyl acetate copolymer resin), olefin resin, PVB (polyvinyl butyral) resin, ionomer resin, silicone resin, or a combination thereof can be used.

The photoelectric conversion element 10 may be provided in the form of a thin film on the second substrate 20. The second substrate 20 is a portion that becomes a base on which the photoelectric conversion element 10 is formed. The second substrate 20 may be made of, for example, a resin substrate, a glass substrate, or a metal substrate. An insulating layer (not shown) may be formed on the surface of the second substrate 20 on the photoelectric conversion element 10 side.

The panel section 110 may have a second sealing layer 800 between the second substrate 20 and the protective material 900. The second sealing layer 800 may be formed of an insulator such as synthetic resin. As such a synthetic resin, for example, EVA resin (ethylene/vinyl acetate copolymer resin), olefin resin, PVB (polyvinyl butyral) resin, ionomer resin, silicone resin, or a combination thereof can be used. Note that the thickness of the second sealing layer 800 may be the same as or different from the thickness of the first sealing layer 400.

The protective material 900 may be made of, for example, PET resin, PVF (polyvinyl fluoride) resin, PVDF (polyvinylidene fluoride) resin, nylon resin, polyamide resin, or a combination thereof.

The panel section 110 may have a sealing material 500 on the side of the photoelectric conversion element 10. The sealing material 500 surrounds the peripheral edges of the photoelectric conversion element 10 and the second substrate 20, and may also adhere to the back side of the first substrate 600. Further, an adhesive 250 may be provided between the panel portion 110 and the frame 120.

The composition or type of the photoelectric conversion element 10 is not particularly limited. Preferably, the photoelectric conversion element 10 is a so-called thin film type photoelectric conversion element. Examples of the thin film type photoelectric conversion element include a so-called CIS-based photoelectric conversion element, a CdTe-based photoelectric conversion element, and an amorphous silicon-based photoelectric conversion element.

These thin film type photoelectric conversion elements 10 can be manufactured by a film forming technique such as vapor deposition or etching. The thin film type photoelectric conversion element 10 manufactured by such a film forming technique can be easily formed into any size by cutting it into an appropriate size. Therefore, it is easy to manufacture the solar cell module 100 having the size described above.

On the other hand, so-called crystal-type photoelectric conversion elements using single-crystal silicon or polycrystalline silicon are constructed from a large number of wafers cut from a cylindrical silicon ingot (silicon block). More specifically, each solar cell module is composed of a large number of wafers arranged in a grid. Therefore, the size of the solar cell module 100 including the crystal type photoelectric conversion element is determined to some extent based on the size of the original silicon ingot, specifically, the wafer. Therefore, it is difficult to manufacture the solar cell module 100 having the above-mentioned size.

However, as long as the solar cell module 100 having the size described above can be manufactured, the solar cell module 100 of the present invention may include a crystalline photoelectric conversion element.

(Second embodiment)
FIG. 7 is a schematic plan view of a roof structure including a solar cell module according to the second embodiment. In the second embodiment, the same components as in the first embodiment are given the same reference numerals. It should be noted that descriptions of configurations similar to those in the first embodiment may be omitted.

In the second embodiment, the arrangement of fixtures 200 is different from the arrangement of fixtures 200 in the first embodiment. Specifically, each fixture 200 is provided at a corner of the solar cell module 100. Note that the structure of the fixture 200 may be the same as the structure of the fixture 200 of the first embodiment.

Furthermore, some of the plurality of fixtures 200 support the corners of four solar cell modules 100 that are close to each other. That is, each fixture 200 located between the solar cell modules 100 supports the corners of the four solar cell modules 100. Thereby, the number of fixtures 200 for supporting the plurality of solar cell modules 100 can be reduced.

As described above, the content of the present invention has been disclosed through the embodiments, but the statements and drawings that form part of this disclosure should not be understood as limiting the present invention. Various alternative embodiments, implementations, and operational techniques will be apparent to those skilled in the art from this disclosure. Therefore, the technical scope of the present invention is determined only by the matters specifying the invention in the claims that are reasonable from the above description.

10 Photoelectric conversion element 100 Solar cell module 200 Fixture 210 Base 212 Loading section 214 Leg section 220 Flange section 240 Fastening member 300 Roof 310 Convex section

Claims (6)

a plurality of solar cell modules arranged in a first direction and a second direction intersecting the first direction ;
a roof including a plurality of protrusions extending in the first direction and arranged in the second direction;
a plurality of fixtures for fixing the solar cell module to the convex portion of the roof,
Each of the fixtures supports at least an end of the solar cell module in the second direction,
The length of the solar cell module is shorter in the second direction than the first distance between the centers of the convex portions where the fixtures for fixing the solar cell module are installed, and the length of the solar cell module is longer than the second distance between the convex portions where the fixing device for fixing is installed;
The fixing device includes a leg portion that contacts the convex portion, a loading portion that supports the load of the solar cell module from below, and a flange that presses the end portions of the solar cell modules adjacent to each other in the second direction from above. having a member;
The loading portion is located above the top of the convex portion,
The flange member is fastened to the base including the loading portion by a fastening member provided between the solar cell modules adjacent to each other in the second direction,
The roof structure , wherein some of the loading parts of the plurality of fixtures load corners of the four solar cell modules that are close to each other . The roof structure according to claim 1, wherein the length of the solar cell module in the second direction is a value obtained by subtracting a range of 10 mm to 50 mm from the first distance. The roof structure according to claim 1 or 2, wherein the length of the solar cell module in the second direction is in the range of 950 mm to 990 mm. The roof structure according to any one of claims 1 to 3, wherein the solar cell module includes a thin film type photoelectric conversion element. The roof structure according to any one of claims 1 to 4 , wherein the loading section is provided at a position overlapping the leg section when viewed from a direction perpendicular to the surface of the solar cell module. The solar cell module includes a pair of long sides and a pair of short sides, and has a substantially rectangular shape when viewed from a direction perpendicular to the light receiving surface,
The roof structure according to any one of claims 1 to 5 , wherein the solar cell module is arranged such that the pair of long sides are along the first direction.

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