JP6905803B2 - Solar cell module, roof structure, and backside reinforcement - Google Patents

Description

The present invention relates to a solar cell module, a roof structure, and a back surface reinforcing member.

Conventionally, a solar cell module has been known as a photoelectric conversion device that converts light energy into electrical energy. This solar cell module is attached directly to a structure such as the roof of a building or via metal fittings or the like to mainly collect sunlight.

In recent years, from the viewpoint of improving the aesthetic appearance, a frameless solar cell module in which a frame is not attached to the outer peripheral portion of the solar cell panel has been developed (for example, Patent Document 1).
However, this frameless solar cell module has a problem that its strength is weaker than that of a conventional solar cell module with a frame because the frame is not attached to the solar cell panel. In particular, when the solar cell module is installed in a high place such as a roof, a blow-up load or the like is applied, which may lead to damage to the solar cell module in some cases.

Japanese Patent No. 5582936

Therefore, the present inventor has prototyped a solar cell module in which a back surface reinforcing plate for reinforcing the strength of the solar cell panel is provided on the back surface of the solar cell panel. This prototype solar cell module is reinforced by surface-bonding a back surface reinforcing plate to the back surface of the solar cell panel.

However, as a result of examining this prototype solar cell module, a new problem has arisen. That is, when the back surface reinforcing plate is brought into surface contact with the back surface of the solar cell panel, the heat generated by the solar cell panel is trapped between the back surface of the solar cell panel and the back surface reinforcing plate, and the temperature of the solar cell panel rises. The problem arose. If the temperature of the solar cell panel rises abnormally too much, the deterioration of the solar cell panel is promoted, and there is a concern that safety and reliability may be impaired.

Therefore, the present invention relates to a solar cell module capable of suppressing the temperature rise of the solar cell panel while ensuring the strength of the solar cell panel, a roof structure using the solar cell module, and a back surface constituting a part of the solar cell module. An object of the present invention is to provide a reinforcing member.

The invention according to claim 1 for solving the above-mentioned problems is a solar cell module having a solar cell panel and a back surface reinforcing member integrally attached to the back surface of the solar cell panel, and the solar cell. In a solar cell module installed on a roof with the light receiving surface of the battery panel tilted, the back surface reinforcing member has a bottomed groove, and gas can pass through the back surface of the solar cell panel and the groove. A first ventilation flow path is formed, and the ventilation flow path extends from one end, which is the eaves side end, to the other end, which is the ridge side end side, at the time of installation. The first flow path includes a flow path and a second flow path that branches off from the middle of the first flow path, and the eaves-side end of the first flow path communicates with the outside. The solar cell module is characterized in that when the light receiving surface is viewed in a plan view, it extends from the outside toward the end side of the building side and communicates with the middle of the first flow path.
The invention related to the above invention is a solar cell module having a solar cell panel and a back surface reinforcing member integrally attached to the back surface of the solar cell panel, in a state where the light receiving surface of the solar cell panel is inclined. In the solar cell module installed in the above, the back surface reinforcing member has a bottomed groove portion, and the back surface of the solar cell panel and the groove portion form a ventilation flow path through which gas can pass. The ventilation flow path has a first flow path extending from one end side to the other end side in the inclined direction at the time of installation, and a second flow path branching from the middle of the first flow path. Is a solar cell module including.

As used herein, "extending from one end side to the other end side" means extending the entire flow path, and does not necessarily have to extend linearly. That is, as long as the entire flow path has a direction vector from one end side to the other end side, the middle portion thereof may extend in a curved shape.

According to the configuration of the present invention, since the solar cell panel is reinforced by the back surface reinforcing member, the mechanical strength of the solar cell panel can be maintained even when the solar cell panel is a frameless solar cell panel.
Further, according to the configuration of the present invention, a ventilation flow path through which a gas such as air can pass is formed between the back surface of the solar cell panel and the back surface reinforcing member, and the ventilation flow path is inclined in the inclined direction. A second flow path that branches from the middle of the first flow path is provided together with a first flow path that extends from one end side to the other end side. Therefore, even if the temperature of the solar cell panel rises during power generation, the heat of the solar cell panel can be taken away by a gas such as air passing through each of the first flow path and the second flow path. That is, according to the configuration of the present invention, since the heat generated in the solar cell panel can be exchanged with a gas such as air, it is possible to prevent heat from being trapped between the back surface of the solar cell panel and the back surface reinforcing member, and the sun. Abnormal temperature rise of the battery panel can be suppressed. Therefore, the deterioration of the solar cell panel is suppressed as compared with the conventional case, and the solar cell module has excellent safety and reliability.

In the above invention, it is preferable that at least one end of the first flow path communicates with the outside.

According to this configuration, air can be introduced into the first flow path to exchange heat.

The invention according to claim 1, wherein the second flow path, that in communication with the outside extends into the first flow path and a different direction.

According to the configuration of the present invention, the second flow path communicates with the outside through an opening different from the end of the first flow path. That is, since the ventilation flow path communicates with the outside at a portion other than the upstream end and the downstream end of the first flow path, the gas passing through the ventilation flow path is likely to be replaced, and the solar cell panel is cooled. High functionality.

By the way, from the viewpoint of heat exchange with the solar cell panel, the larger the width of the groove portion and the wider the width of the ventilation flow path, the larger the amount of air passing through and the easier it is for heat exchange. On the other hand, if the width of the groove is increased, the contact surface between the back surface reinforcing member and the back surface of the solar cell panel becomes smaller, so that the function of the back surface reinforcing member to reinforce the mechanical strength of the solar cell panel is significantly reduced. There is a problem of doing it.

Therefore, in the invention according to claim 2 , the groove portion is isolated in a peninsula shape or an island shape in the groove portion, and includes a first support portion that supports a part of the back surface of the solar cell panel. the first flow path is a solar cell module according to claim 1, characterized in that it is branched into a plurality by the first support portion.

According to the configuration of the present invention, since a part of the back surface of the solar cell panel is supported by the first support portion that branches the first flow path into a plurality of branches, the contact area between the back surface reinforcing member and the back surface of the solar cell panel. It is possible to suppress a decrease in the total cross-sectional area of the first flow path while ensuring the above.

The invention according to claim 3 includes a second support portion formed adjacent to the first flow path and supporting a part of the back surface of the solar cell panel, and the second support portion is the said. A branch groove extending in a direction intersecting the extension direction of the first flow path is formed, and the second flow path is formed by the back surface of the solar cell panel and the branch groove, and the second support portion. The solar cell module according to claim 1 or 2 , wherein a part of the inner wall is formed by the solar cell module.

According to the configuration of the present invention, since a part of the back surface of the solar cell panel is supported by the second support portion forming a part of the inner wall of the second flow path, the back surface reinforcing member and the back surface of the solar cell panel The second flow path can be formed while securing the contact area of the above.

According to the fourth aspect of the present invention, the solar cell panel has a horizontally long plate shape and has two sides facing each other in the lateral direction, and the back surface reinforcing member is the lateral direction of the solar cell panel. It crosses between two opposing sides, has a plurality of main bodies and a bridging portion connecting adjacent main bodies, and the ventilation flow between the back surface of the solar cell panel and each main body. A road is formed, and the ventilation flow path includes a merging flow path communicating with the outside, and the merging flow path is provided on the ridge side end side of the bridging portion in the inclined direction. The solar cell module according to any one of claims 1 to 3.

According to the configuration of the present invention, since the ventilation flow path is formed between the back surface of the solar cell panel and each main body portion, the cooling function to the solar cell panel is high.

The invention according to claim 5 is characterized in that the main body portion has a raised portion raised with respect to another portion, and the bridging portion connects the raised portions between adjacent main body portions. The solar cell module according to claim 4.

According to the configuration of the present invention, the bridging portion connects the raised portions between the adjacent main body portions. That is, since the raised portion is arranged at the connecting portion between the bridging portion and the main body portion where a load is easily applied, the back surface reinforcing member is less likely to be damaged.

In the above-described invention, the main body portion has a raised portion that is raised with respect to other portions, the raised portion is provided with a back surface groove portion on the back surface, and the back surface groove portion is in an inclined direction at the time of installation. The raised portion extends from one end side to the other end side, and the back surface groove portion may be formed so as to avoid the groove portion in the thickness direction of the raised portion.

Normally, when the solar cell module is installed outdoors such as on the roof of a building, the solar cell module is exposed to rain or the like.
According to the solar cell module of the present invention, the main body portion is provided with a raised portion that is raised with respect to other portions. That is, in the solar cell module of the present invention, a step is formed between the raised portion and the other portion. Therefore, when water such as rain travels on the back surface of the back surface reinforcing member, it may be blocked by the step and a puddle may be generated.
Therefore, according to the configuration of the present invention, since the back surface groove portion is formed, the water transmitted through the back surface of the back surface reinforcing member can escape from the back surface groove portion, and the generation of a puddle due to the step of the raised portion can be suppressed.
Further, according to the configuration of the present invention, since the back surface groove portion is formed so as to avoid the groove portion in the thickness direction of the main body portion, the groove portion and the back surface groove portion do not overlap in the thickness direction, and the extremely narrowed portion is formed. Not formed. Therefore, the back surface reinforcing member is not easily damaged.

In the above-mentioned solar cell module, the solar cell panel has a horizontally long plate shape and has two sides facing each other in the lateral direction, and the sides other than the two facing sides of the solar cell panel are the light receiving surfaces. Most or all of it may be directly visible when viewed from the side.

The term "most" as used herein means a range of 70% or more of the total.

The above-described invention is a solar cell module having a rectangular solar cell panel and arranged side by side with other solar cell modules in the longitudinal direction of the solar cell panel, when the light receiving surface is viewed in a plan view. opposite short side of the solar panels, most or all thereof either may me directly viewable der.

According to the configuration of this, since the sides facing in the longitudinal direction of the solar cell panel is exposed directly to the outside, for example, the light-receiving surface of the solar cell panel at the time of forming the roof structure with other solar cell module It is possible to form one substantially continuous plane together with the light receiving surface of another solar cell module. Therefore, it is difficult to see the seam between the light receiving surfaces of the solar cell modules adjacent to each other in the longitudinal direction, and it is possible to give the user the impression that the light receiving surfaces of each solar cell module extend in a series in the longitudinal direction. can.
The term "substantially continuous" as used herein includes not only the case of being continuous without interruption but also the case of being continuous with a slight gap (for example, 1.5 cm or less).

The invention of claim 6 has a pin box, a cable portion extending from the terminal box, the back reinforcing member, said cable portion fitted to part or all of the cable portion The solar cell module according to any one of claims 1 to 5 , further comprising a cable holding portion capable of holding the above.

According to the configuration of the present invention, since the back surface reinforcing member has the cable holding portion, the cable portion does not easily interfere with the laying work and the like.

The invention according to claim 7 has a terminal box, the solar cell panel has a panel main body and a heat sink, and the heat sink constitutes the back surface of the solar cell panel. The heat sink is made of metal or alloy and has a through hole, which constitutes a part of the inner wall of the ventilation flow path, and the terminal box is inserted into the through hole of the heat sink. it is a solar cell module according to claim 1, characterized in that covering the power generation region of at least the panel body.

According to the configuration of the present invention, since the heat sink forming the back surface of the solar cell panel forms a part of the inner wall of the ventilation flow path, the heat sink is exposed to the cooling gas and is generated in the solar cell panel. The heat generated is easily dissipated.

In the above invention, the solar cell panel includes a solar cell, a front surface sealing member, and a back surface sealing member, and the solar cell includes the front surface sealing member and the back surface sealing member. It is sandwiched and sealed between the stopping members, and the back surface side sealing member may be a sealing film and may form an inner wall of the ventilation flow path.

According to the configuration of this, since the sealing film serving backside sealing member constitutes the inner wall of the ventilation passage, heat between the gas such as air passing through the solar cell and the ventilation channel It is easy to conduct and has a large cooling function for solar cells.

By the way, as a typical example of a solar cell, there is a silicon-based solar cell. Further, this silicon-based solar cell includes a thin-film silicon solar cell and a crystalline silicon-based solar cell.
Unlike thin-film silicon solar cells, this crystalline silicon solar cell has a problem that the power generation efficiency decreases as the temperature rises.

Therefore, in the above-described invention, the solar cell panel may include a crystalline silicon-based solar cell including a crystalline silicon substrate.

The term "crystalline silicon-based solar cell" as used herein refers to a single-crystal silicon-based solar cell, a polycrystalline silicon-based solar cell, a microcrystalline silicon-based solar cell, a hybrid solar cell in which these are combined, and the like.

According to the configuration of the present invention, since the temperature rise is suppressed by the above-mentioned ventilation flow path, high power generation efficiency can be maintained even with such a crystalline silicon solar cell panel.

According to the above invention, in a solar cell module having a solar cell panel and a back surface reinforcing member integrally attached to the back surface of the solar cell panel, the back surface reinforcing member has a bottomed groove. A ventilation flow path through which gas can pass is formed by the back surface of the solar cell panel and the groove portion, and the ventilation flow path is from one end side to the other end side of the solar cell panel. A first flow path extending up to and a second flow path extending from the middle of the first flow path may be included, and at least one end of the first flow path may communicate with the outside.

According to the configuration of this, the solar cell panel even when a frameless solar cell panel can hold mechanical strength of the solar cell panel.
Further, according to the configuration of this, even if the temperature rises during the solar panel power generation, it is possible to remove heat of the solar cell panel by a gas such as air passes through each of the first flow path and second flow path .. That is, since the heat generated by the solar cell panel can be exchanged with a gas such as air, it is possible to prevent heat from being trapped between the back surface of the solar cell panel and the back surface reinforcing member, and the temperature rise of the solar cell panel becomes abnormal. Can be suppressed. Therefore, the deterioration of the solar cell panel is suppressed as compared with the conventional case, and the solar cell module has excellent safety and reliability.

The invention according to claim 8 is attached to the roof eaves direction together with another solar cell module or roof tile member located on the eaves side with respect to the roof base, and is at least on the other solar cell module or roof tile member. A solar cell module in which a part is arranged with overlapping portions in a stepped manner, and has an eaves-side holding portion for holding the eaves-side end portion of the solar cell panel, and the tile member engages with the eaves-side holding portion. A possible engaging portion is attached, and when installed on the roof base together with the other solar cell module or the roof tile member, a part of the other solar cell module whose eaves side is adjacent to the eaves side or the roof tile member. The invention according to any one of claims 1 to 7 , wherein the engaging portion is engaged with the engaging portion attached to the roof tile, and the movement in the vertical direction is restricted by the other adjacent solar cell module or the engaging portion. Solar cell module.

The invention according to claim 9 includes the solar cell module according to any one of claims 1 to 8 , and the solar cell module is mounted on a foundation roof structure covered with a plurality of roof tile members by using mounting brackets. In the roof structure, the mounting bracket has a first recess and a second recess that opens in the direction opposite to the first recess, and the mounting bracket is one of the tile members in the first recess. The roof structure is characterized in that a portion is inserted and fixed to the foundation roof structure, and a part of the solar cell module is inserted into the second recess to hold the solar cell module.

According to the configuration of the present invention, the solar cell module is attached to the roof tile member by inserting the tile member into the first recess of the mounting bracket and inserting the solar cell module into the second recess of the mounting bracket. The battery module does not easily come off from the tile member.

In the above invention, the top surface of the first recess and the bottom surface of the second recess may be formed of a common member.

According to the configuration of this, the bottom surface of the top surface and the second recess of the first recess is formed by a common member. That is, the height difference between the first recess and the second recess is about the thickness of the common member, and the solar cell module is fixed in a state of being close to or in contact with the roof tile member, so that the solar cell module is fixed to another roof tile. It is hard to see as if it floats on the member, and the design is good.

The invention according to claim 10 is a back surface reinforcing member forming a part of a solar cell module installed on a roof in a state where the light receiving surface of the solar cell panel is inclined, and is integrated with the back surface of the solar cell panel. The back surface reinforcing member attached to the solar cell panel has a bottomed ventilation groove portion, and the ventilation groove portion forms a ventilation flow path through which gas can pass together with the back surface of the solar cell panel. groove for aeration, at the time of installation of the solar cell module, and the one flow path and a second main flow path extending from one end portion serving as eaves side end portion in the inclination direction to the other end serving as ridge-side end portion side, the are those of the sub flow path extending branched from the middle of the two flow paths join in the middle of the first main channel constituting including the ventilation passage, the groove vent includes a solar cell module When the second main flow path whose eaves side end communicates with the outside and the light receiving surface are viewed in a plan view, the eaves side end is inclined from the middle of the second main flow path toward the ridge side end side. wherein the secondary flow path Ru extending a back surface reinforcing member and having a first main channel of the eaves side end portion communicates with the outside, respectively a corresponding portion of.
The above invention is a back surface reinforcing member that constitutes a part of a solar cell module installed in a state where the light receiving surface of the solar cell panel is inclined, and is a back surface reinforcing member that is integrally attached to the back surface of the solar cell panel. The groove has a bottomed groove, and the groove forms a ventilation flow path through which gas can pass together with the back surface of the solar cell panel. The ventilation flow path is used to install a solar cell module. Occasionally, at least one of the first flow paths includes a first flow path extending from one end side to the other end side in the inclined direction and a second flow path branching from the middle of the first flow path. One end relates to a back surface reinforcing member communicating with the outside.

According to the configuration of the present invention, even when the solar cell panel is a frameless solar cell panel, the mechanical strength of the solar cell panel can be maintained.
Further, according to the configuration of the present invention, even if the temperature of the solar cell panel rises during power generation, the heat of the solar cell panel can be taken away by a gas such as air passing through each of the first flow path and the second flow path. can. That is, since the heat generated in the solar cell panel can be exchanged with a gas such as air, it is possible to prevent the heat from being trapped in the solar cell panel and suppress an abnormal temperature rise of the solar cell panel.

According to the solar cell module, the roof structure, and the back surface reinforcing member of the present invention, it is possible to suppress the temperature rise of the solar cell panel while ensuring the strength of the solar cell panel.

It is a perspective view which shows typically the roof structure of 1st Embodiment of this invention. It is a perspective view of the solar cell module of FIG. It is a perspective view which looked at the solar cell module of FIG. 2 from the direction different from FIG. FIG. 2 is a partially cutaway perspective view of the solar cell module of FIG. 2, which is a partially cutaway perspective view of a solar cell panel. It is a cross-sectional perspective view of the solar cell module of FIG. It is a top view of the solar cell panel of FIG. It is sectional drawing of the solar cell panel of FIG. It is a perspective view of the back surface reinforcing member of FIG. FIG. 8 is a perspective view of the back surface reinforcing member of FIG. 8 as viewed from a direction different from that of FIG. It is a top view of the back surface reinforcing member of FIG. It is a side view of the back surface reinforcing member of FIG. It is explanatory drawing of the ventilation flow path of the solar cell module of FIG. 2, (a) shows the state which the air flowed in the main flow path, and (b) shows the state where the air flowed in the branch flow path. It is a perspective view of the slate roof tile of FIG. It is a perspective view of the intermediate mounting bracket of FIG. It is sectional drawing of the intermediate mounting bracket of FIG. It is sectional drawing which shows the state which removed the solar cell panel from the roof structure of FIG. It is an enlarged view of the area A of the roof structure of FIG. It is an enlarged view of the B region of the roof structure of FIG. It is sectional drawing of the roof structure of FIG. 1, and shows the area around the eaves. It is an enlarged view of the C region of the roof structure of FIG. It is an enlarged view of the D area of the roof structure of FIG. It is sectional drawing of the roof structure of FIG. 1, and shows the ridge side more than FIG. It is a perspective view which shows typically the roof structure of the 2nd Embodiment of this invention. It is a perspective view of the solar cell module of FIG. It is a perspective view of the solar cell module of FIG. 24 as seen through the solar cell panel, and the enlarged view shows the periphery of the reinforcing bar. It is an exploded view of the solar cell panel of FIG. It is a perspective view of the solar cell module of FIG. 24 as seen from the back surface side. It is explanatory drawing which shows the back surface reinforcing member of FIG. 27, (a) is the front view of the back surface reinforcing member, (b) is the back view of the back surface reinforcing member. FIG. 28 (a) is an enlarged view of the vicinity of the end side main body portion of the back surface reinforcing member. FIG. 28 (a) is an enlarged view of the vicinity of the central end side main body portion of the back surface reinforcing member. It is an exploded perspective view of the holding member of the solar cell module of FIG. It is sectional drawing of the roof structure of FIG. FIG. 23 is a view focusing on the periphery of one solar cell module in the roof structure of FIG. 23, and is a perspective view showing a state in which the solar cell module is removed from the roof tile member. It is a figure which paid attention to the periphery of the group of solar cell modules of the roof structure of FIG. 23, (a) is the figure of the group of solar cell modules, and (b) is the cross-sectional view of AA of (a). It is explanatory drawing which shows the air flow in the vicinity of the end side main body part of the solar cell module in the roof structure of FIG. 23, (a) shows the air flow in the main flow path of a ventilation path, and (b) is the ventilation path. Represents the flow of air in the sub-channel and auxiliary channel of. It is explanatory drawing which shows the air flow in the vicinity of the central body part of the solar cell module in the roof structure of FIG. 23, (a) shows the air flow in the main flow path of a ventilation path, and (b) shows the flow of the ventilation path. Represents the flow of air in the secondary flow path.

Hereinafter, the solar cell module 1 according to the first embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the front-rear direction, the vertical direction, and the left-right direction will be described with reference to the normal installation state shown in FIG. 1 unless otherwise specified.

As shown in FIG. 1, the solar cell module 1 of the first embodiment of the present invention is mainly installed on the roof of a building. The solar cell module 1 constitutes a roof structure 200 by being fixed via an eaves mounting bracket 205 and an intermediate mounting bracket 206 on a foundation roof structure 203 on which a plurality of slate tiles 202 (roof tile members) are laid. be. Further, a rain cover plate 201 is partially installed in a necessary portion of the roof structure 200.

As shown in FIG. 3, the solar cell module 1 includes a solar cell panel 2 and a back surface reinforcing member 3. Then, in the solar cell module 1, a ventilation flow path 8 through which gas can pass is formed by the solar cell panel 2 and the back surface reinforcing member 3, and the gas such as air passes through the ventilation flow path 8. One of the main features is that the solar cell panel 2 can be cooled.
Based on this, the solar cell module 1 will be described in detail below.

As shown in FIG. 2, the solar cell module 1 is a so-called frameless solar cell module in which a frame is not attached to the edge of the solar cell panel 2. As can be read from FIGS. 2 and 3, the solar cell module 1 includes a solar cell panel 2, a back surface reinforcing member 3, a terminal box 5, and a side gasket 6 as main constituent members.

The solar cell panel 2 is a crystalline solar cell panel on which a crystalline silicon solar cell is mounted, and includes a crystalline silicon substrate as a support substrate.
As shown in FIG. 2, the solar cell panel 2 is a solar cell panel having a planar spread. Specifically, the solar cell panel 2 is a quadrangular plate-shaped panel as shown in FIG. 6, and when the light receiving surface 16 is viewed in a plan view, the vertical sides 12 and 13 (opposed) facing the horizontal direction X. The two sides) and the horizontal sides 10 and 11 (sides other than the two opposite sides) that connect the vertical sides 12 and 13 and face each other in the vertical direction Y are provided. That is, the horizontal sides 10 and 11 are long sides extending in the horizontal direction X, and the vertical sides 12 and 13 are short sides extending in the vertical direction Y.
As shown in FIG. 6, the solar cell panel 2 of the present embodiment has a horizontally long rectangular shape, and the horizontal sides 10 and 11 are longer than the vertical sides 12 and 13.
Further, as described above, the solar cell panel 2 is not attached with a frame, and most or all of the lateral sides 10 and 11 of the solar cell panel 2 are directly visible when viewed from the light receiving surface 16 side. It is possible.

Most of the solar cell panel 2 is provided with a power generation capable region 15 capable of converting light energy into electric energy. The power generation capable region 15 is a region that forms a part of the light receiving surface 16 and occupies most of the solar cell panel 2 when the light receiving surface 16 is viewed from the front.
The power generation capable region 15 of the present embodiment is a horizontally long rectangular region when the light receiving surface 16 is viewed from the front, and occupies 70% or more of the total area of the solar cell panel 2.

Focusing on the cross-sectional structure of the solar cell panel 2, as shown in FIG. 7, the solar cell panel 2 has a photoelectric conversion element 25 interposed between the two sealing members 26 and 27, and the sealing member The filler 28 is filled in the gap between 26 and 27.
The solar cell 20 of the present embodiment is a crystalline silicon solar cell in which silicon semiconductor layers are laminated on both sides of a silicon substrate. That is, the solar cell 20 is formed by sandwiching the photoelectric conversion unit 31 containing silicon as a main component between the two electrode layers 30 and 32.

The electrode layer 30 on the light receiving surface 16 side is a transparent electrode layer formed of a transparent conductive layer. As the electrode layer 30, for example, a transparent conductive oxide such as indium tin oxide (ITO) can be used.
The electrode layer 32 on the back surface side (opposite side to the light receiving surface 16) is a metal electrode layer formed of a metal layer. The electrode layer 32 may be formed of, for example, a metal such as aluminum, or may be formed of a multilayer structure of a transparent conductive oxide layer and a metal layer.
The photoelectric conversion unit 31 has at least a p-type semiconductor layer and an n-type semiconductor layer, and is provided with a PN junction or a PIN junction.

The surface-side sealing member 26 on the light-receiving surface 16 side is a plate-shaped sealing plate. The surface-side sealing member 26 is, for example, a transparent insulating plate such as a glass substrate.
The back surface side sealing member 27 is a sealing plate or a sealing film. The back surface side sealing member 27 is, for example, an insulating plate such as a glass substrate or a sealing film such as a PET film.
The front surface side sealing member 26 of the present embodiment is a transparent insulating plate, and the back surface side sealing member 27 of the present embodiment is a sealing film.
The filler 28 is a sealing material that fills and seals the space between the sealing members 26 and 27.

In the power generation capable region 15 of the solar cell panel 2, as shown in FIG. 6, when the light receiving surface 16 is viewed in a plan view, a plurality of solar cell cells 20 are distributed with a spread in the vertical and horizontal directions, and a plurality of solar cell strings 21 , 22 are formed.
Specifically, in the power generation capable region 15, as can be read from FIGS. 6 and 7, each solar cell 20 is connected in series via a wiring member 35 to form each solar cell string 21 or 22. That is, in the solar cells 20a and 20b adjacent to the lateral direction X, the second electrode layer 32 of one solar cell 20a is electrically connected to the first electrode layer 30b of the other solar cell 20b. That is, the solar cells 20a and 20b adjacent to each other in the lateral direction X are electrically connected in series.

Further, in the power generation capable region 15, in the vertical direction Y, one end of each of the solar cell strings 21 and 22 is connected via the connection wiring 34, and the other end is connected via the take-out wirings 36 and 37. It is connected to the terminal box 5 on the back side. That is, the solar cell strings 21 and 22 adjacent to each other in the vertical direction Y are electrically connected in series via the connection wiring 34.

The take-out wirings 36 and 37 are wirings that are electrically connected to the electrode layers 30 and 32 of the photoelectric conversion element 25 described above and take out electricity from the solar cell panel 2. That is, one take-out wiring 36 is a positive electrode wiring, and the other take-out wiring 37 is a negative electrode wiring.
The extension ends of the take-out wirings 36 and 37 are drawn into the terminal box 5 (see FIG. 3), one take-out wiring 36 is electrically connected to the positive electrode side cable portion 45, and the other take-out wiring is connected. 37 is electrically connected to the negative electrode side cable portion 46.
The cable portions 45 and 46 are both conductive cables extending linearly.
The cable portions 45 and 46 are provided with wiring portions, one end in the longitudinal direction is connected to the take-out wires 36 and 37, and connector portions 47 and 48 are provided at the other end of the wiring portion. ..
The positive electrode connector portion 47 is a connector that can be connected to the negative electrode connector portion 48 of the other solar cell panel 2, and the negative electrode connector portion 48 is a connector that can be connected to the positive electrode connector portion 47 of the other solar cell panel 2.

As shown in FIG. 4, the back surface reinforcing member 3 is a reinforcing member that is adhered to the back surface of the solar cell panel 2 to reinforce the strength of the solar cell panel 2. Further, the back surface reinforcing member 3 is a member made of foamed resin, and is a heat insulating reinforcing member having heat insulating properties.
The back surface reinforcing member 3 is a member extending in the longitudinal direction of the solar cell panel 2 as a whole, and is a comb-shaped member when viewed in a plan view. The back surface reinforcing member 3 of the present embodiment extends in the lateral direction X (direction orthogonal to the eaves building direction and orthogonal to the top-bottom direction) as a whole.

As shown in FIGS. 8 and 9, the back surface reinforcing member 3 includes a plurality of main body portions 50, 51, 52 and bridging portions 53, 54 for bridging the main body portions 50, 51, 52.
The main body portions 50, 51, and 52 are substantially quadrangular portions having a planar spread, and are arranged side by side at predetermined intervals in the lateral direction X.

The main body portions 50, 52 (hereinafter, also referred to as end side main body portions 50, 52) located on both end portions in the lateral direction X are portions for reinforcing both end portions of the solar cell panel 2.
The main body 51 (hereinafter, also referred to as the central main body 51) located on the central side in the lateral direction X is located between the end main bodies 50 and 52, and is a portion that reinforces the central portion of the solar cell panel 2. be.
The end side main body 50 and the central main body 51 are connected by a bridging portion 53, and the central main body 51 and the end side main body 52 are connected by a bridging portion 54.

As shown in FIG. 9, the main body portions 50, 51, 52 are continuous with the flat plate portions 55, 56, 57 and the flat plate portions 55, 56, 57, and the raised portions 60, 61, 62 with a part of the back surface raised. It has. That is, the main body portions 50, 51, 52 have a step between the back surfaces of the flat plate portions 55, 56, 57 and the back surfaces of the raised portions 60, 61, 62, and the back surfaces of the flat plate portions 55, 56, 57 and the raised portions 60, The back surfaces of 61 and 62 are continuous in a stepped manner via the vertical wall portions 65, 66 and 67.

The flat plate portions 55, 56, 57 are substantially square-shaped portions, and are plate-shaped portions projecting from the raised portions 60, 61, 62 in the vertical direction Y (eave-building direction).
The raised portions 60, 61, 62 are portions that are raised as compared with the other portions of the main body portions 50, 51, 52, and are mainly portions to which the bridging portions 53, 54 are connected. That is, the raised portions 60, 61, 62 are thicker than the flat plate portions 55, 56, 57.

The end-side main body 50 includes a storage notch 70 for storing a part of the terminal box 5.
The storage notch 70 is a notch cut from the flat plate 55 side over a part of the flat plate 55 and the raised portion 60. That is, the storage notch 70 also has a part of the raised portion 60 notched.

Further, the central body portion 51 includes a central cutout portion 71 in which a part of the flat plate portion 56 is cut out. The central notch 71 is located at the center of the back surface reinforcing member 3 in the lateral direction X, and is a notch extending in the vertical direction Y (eaves direction) from the end of the flat plate portion 56 toward the raised portion 61.
The central notch 71 does not reach the raised portion 61. That is, the central notch 71 divides only the flat plate portion 56 of the central main body portion 51 into two flat plate pieces 79 and 80.

As shown in FIG. 9, the raised portion 60 belonging to the end side main body portion 50 (hereinafter, also referred to as the end side raised portion 60) extends from one end of the vertical direction Y to the other end. The groove portion 75 is provided.
The raised portion 61 belonging to the central main body portion 51 (hereinafter, also referred to as the central raised portion 61) includes back surface groove portions 76 and 77 extending from one end to the other end in the vertical direction Y. Specifically, the central raised portion 61 is formed with back surface groove portions 76 and 77 corresponding to the flat plate pieces 79 and 80, respectively.
The raised portion 62 belonging to the end side main body portion 52 (hereinafter, also referred to as an end side raised portion 62) includes a back surface groove portion 78 extending from one end portion in the vertical direction Y to the other end portion.
The back surface groove portions 75, 76, 77, and 78 are all drainage grooves for passing water or the like flowing along the back surface of the solar cell module 1 in the event of rain or the like.

The back surface groove portion 75 formed in the end side raised portion 60 is an intermediate portion in the lateral direction X of the end side raised portion 60, and extends vertically toward the storage notch 70. In the present embodiment, the back surface groove portion 75 is formed in a straight line near the center of the end side raised portion 60 in the lateral direction X.
The back surface groove portions 76 and 77 formed in the central side raised portion 61 are formed in the middle portion in the lateral direction X of the central side raised portion 61 and outside the central cutout portion 71. Further, the back surface groove portions 76 and 77 extend vertically toward the intermediate portion in the lateral direction X of the flat plate pieces 79 and 80, respectively. In the present embodiment, the back surface groove portions 76 and 77 are formed linearly toward the center of the flat plate pieces 79 and 80 in the lateral direction X, respectively.
The back surface groove portion 78 formed in the end side raised portion 62 is formed in the intermediate portion in the lateral direction X of the end side raised portion 62, and extends vertically toward the intermediate portion of the flat plate portion 57. In the present embodiment, the back surface groove portion 78 is formed linearly in the center of the end side raised portion 62 in the lateral direction X.

Focusing on the front surface side (solar cell panel 2 side) of the back surface reinforcing member 3, the back surface reinforcing member 3 has a ventilation groove 81 formed in the end side main body 50 as shown in FIG. 8, and is in the center. A plurality of ventilation groove portions 82 and 83 are formed in the side main body portion 51, and a ventilation groove portion 84 is formed in the end side main body portion 52.
The ventilation groove portions 81, 82, 83, 84 are grooves through which gas passes between the solar cell module 1 and the back surface of the solar cell module 1 when the solar cell module 1 is assembled, and all of them are bottomed grooves having a bottom portion. be.

The ventilation groove 81 belonging to the end side main body 50 is formed from the main trunk groove 85 formed in the entire vertical direction Y (eave direction) in the end side main body 50 and the extension direction intermediate portion of the main trunk groove 85. A plurality of branch groove portions 86, 87 branched in a direction intersecting with the extending direction are provided.
The groove width of the main trunk groove portion 85 is different between the portion belonging to the flat plate portion 55 and the portion belonging to the raised portion 60, and the portion belonging to the flat plate portion 55 has a larger groove width than the portion belonging to the raised portion 60.
Further, the portion of the main trunk groove portion 85 belonging to the flat plate portion 55 includes a first support portion 88 extending in the same direction as the extension direction of the main trunk groove portion 85 at the intermediate portion in the extension direction of the main trunk groove portion 85.
The first support portion 88 is an island-shaped isolated ridge portion in the main trunk groove portion 85, and is also a support portion that supports the back surface of the solar cell panel 2 when the solar cell module 1 is assembled.

The branch groove portions 86 and 87 are grooves formed in the flat plate portion 55, and are bottomed grooves extending from the main trunk groove portion 85 toward the center side in the lateral direction X. The branch groove portions 86 and 87 are arranged side by side at predetermined intervals in the vertical direction Y. That is, the branch groove portions 86 and 87 divide the flat plate portion 55 in the vertical direction Y, and in the vertical direction Y so as to be adjacent to the branch groove portions 86 and 87 and both outer sides thereof along the main trunk groove portion 85. The side-by-side support wall portions 89, 90, 91 (second support portion) are formed.
That is, in the lateral direction X, the support wall portion 91 is arranged at the corner portion on the center side of the flat plate portion 55 of the end side main body portion 50, and is arranged along the central side of the end side main body portion 50. , Support wall portions 89, 90, 91 are arranged side by side in order from the base end side. Further, the tip surface of the support wall portion 89 located on the most proximal side is flush with the surface of the raised portion 60.

The ventilation groove portions 82 and 83 belonging to the central main body portion 51 are formed so as to extend from the raised portion 61 to the flat plate pieces 79 and 80, respectively.
Since the shapes of the ventilation groove portions 82 and 83 are only symmetrical with respect to the center, the following description mainly focuses on the ventilation groove portion 82, and the ventilation groove portion 83 is the same. Reference numerals will be given and the description thereof will be omitted.

The ventilation groove portion 82 passing through the flat plate piece 80 is a plurality of branches that are branched from the main trunk groove portion 95 formed over the entire vertical direction Y and the extension direction intermediate portion of the main trunk groove portion 95 in a direction intersecting with the extension direction. Grooves 96, 97, 98, 99 are provided.
The groove width of the main trunk groove portion 95 is different between the portion belonging to the flat plate portion 56 and the portion belonging to the raised portion 61, and the portion belonging to the flat plate portion 56 has a larger groove width than the portion belonging to the raised portion 61.
Further, the portion of the main trunk groove portion 95 belonging to the flat plate portion 56 includes a first support portion 100 extending in the same direction as the extension direction of the main trunk groove portion 95 at the intermediate portion in the extension direction of the main trunk groove portion 95.
The first support portion 100 is a peninsula-shaped isolated ridge portion in the main trunk groove portion 95, and extends from the tip end portion of the flat plate portion 56 toward the raised portion 61, but does not reach the raised portion 61. That is, the first support portion 100 is arranged so as to block between the branch groove portions 97 and 99, and a gap 107 is formed between the first support portion 100 and the raised portion 61. The branch groove portions 96 and 98 communicate with each other in the lateral direction X via the gap 107.

The branch groove portions 96 and 97 are bottomed grooves formed in the flat plate portion 56 and extending from the main trunk groove portion 95 toward the center side in the lateral direction X. Specifically, the branch groove portions 96 and 97 extend from the main trunk groove portion 95 toward the central notch portion 71.
Further, the branch groove portions 96 and 97 are arranged side by side at predetermined intervals in the vertical direction Y. That is, the branch groove portions 96 and 97 divide the flat plate portion 56 in the vertical direction Y, and in the vertical direction Y between the branch groove portions 96 and 97 and on both outer sides thereof so as to be adjacent along the main trunk groove portion 95. Support wall portions 101, 102, 103 (second support portion) arranged side by side are formed. That is, the support wall portion 103 is arranged at the corner portion on the central side of the flat plate portion 56 of the flat plate piece 80, and the support wall portions 101 and 102 are sequentially arranged from the base end side along the central side side of the flat plate piece 80. , 103 are arranged side by side. The tip surface of the support wall portion 101 located on the most proximal side is flush with the surface of the raised portion 61.

The branch groove portions 98 and 99 are grooves formed in the flat plate portion 56 like the branch groove portions 96 and 97, and are directed from the main trunk groove portion 95 to the side opposite to the branch groove portions 96 and 97 (end side main body portion 50 side). It is an extended bottomed groove. That is, the branch groove portions 98 and 99 extend in a direction away from the branch groove portions 96 and 97.
Further, the branch groove portions 98 and 99 are arranged side by side at a predetermined interval in the vertical direction Y. That is, the branch groove portions 98 and 99 divide the flat plate portion 56 in the vertical direction Y, and in the vertical direction Y so as to be adjacent to each other between the branch groove portions 98 and 99 and both outer sides thereof along the main trunk groove portion 95. The side-by-side support wall portions 104, 105, 106 (second support portion) are formed. That is, the support wall portion 106 is arranged at the corner portion of the flat plate piece 80 on the outside (end side main body portion 50 side) of the flat plate portion 56, and the support wall portion 104 is arranged along the outer side of the flat plate piece 80. , 105, 106 are arranged side by side. The tip surface of the support wall portion 104 located on the most proximal side is flush with the surface of the raised portion 61.

The ventilation groove portion 84 belonging to the end side main body portion 52 is formed from the main trunk groove portion 110 formed in the entire vertical direction Y (eave ridge direction) in the end side main body portion 52 and the extension direction intermediate portion of the main trunk groove portion 110. A plurality of branch groove portions 111 and 112 branched in a direction intersecting the extending direction are provided.
The groove width of the main trunk groove portion 110 is different between the portion belonging to the flat plate portion 57 and the portion belonging to the raised portion 62, and the portion belonging to the flat plate portion 57 has a larger groove width than the portion belonging to the raised portion 62.
Further, the portion of the main trunk groove portion 110 belonging to the flat plate portion 57 includes a first support portion 113 extending in the same direction as the extension direction of the main trunk groove portion 110 at the intermediate portion in the extension direction of the main trunk groove portion 110.
The first support portion 113 is a peninsula-shaped isolated ridge portion in the main trunk groove portion 110, and extends from the end portion of the end end side main body portion 52 toward the raised portion 62, but reaches the raised portion 62. not present. That is, the first support portion 113 is arranged so as to block the extending direction of the branch groove portion 111, and a gap 117 is formed between the first support portion 113 and the raised portion 62.

The branch groove portions 111 and 112 are grooves formed in the flat plate portion 57, and are bottomed grooves extending from the main trunk groove portion 110 toward the center side in the lateral direction X. The branch groove portions 111 and 112 are arranged side by side at predetermined intervals in the vertical direction Y. That is, the branch groove portions 111 and 112 divide the flat plate portion 57 in the vertical direction Y, and in the vertical direction Y so as to be adjacent to the branch groove portions 111 and 112 and both outer sides thereof along the main trunk groove portion 110. The side-by-side support wall portions 114, 115, 116 (second support portion) are formed.
That is, the support wall portion 116 is arranged at the corner portion on the center side of the flat plate portion 57 of the end side main body portion 52, and the support wall portion 116 is arranged in order from the base end side along the central side side of the end side main body portion 52. Support wall portions 114, 115, 116 are arranged side by side. The tip surface of the support wall portion 114 located on the most proximal side is flush with the surface of the raised portion 62.

The bridging portions 53 and 54 are elongated plate-shaped portions extending in the lateral direction X as shown in FIG. The bridging portion 53 connects the raised portions 60 and 61, and the bridging portion 54 connects the raised portions 61 and 62.
As shown in FIG. 11, the surfaces of the bridging portions 53 and 54 form the same plane as the surfaces of the raised portions 60, 61 and 62, and are flush with each other. On the other hand, the back surfaces of the bridging portions 53 and 54 are recessed with respect to the back surfaces of the raised portions 60, 61 and 62. That is, the thickness of the bridging portions 53 and 54 is thinner than the thickness of the raised portions 61 and 62.

Here, the positional relationship of each part constituting the back surface reinforcing member 3 will be described.

In the back surface reinforcing member 3, as shown in FIG. 11, in the central side raised portion 61, the main trunk groove portions 95 and 95 located on the front surface side are located inside the back surface groove portions 76 and 77 located on the back surface side. .. Further, in the central raised portion 61, no groove is formed in the portion between the main trunk groove portions 95 and 95. That is, no groove is formed in the portion corresponding to the central cutout portion 71 (the portion located between the flat plate pieces 79 and 80).
In the back surface reinforcing member 3, the main trunk groove portions 85 and 110 located on the front surface side of the end side raised portions 60 and 62 are located outside the back surface groove portions 75 and 78 located on the back surface side.

As shown in FIG. 10, the storage cutout portion 70 is located inside the main trunk groove portion 85 and outside the bridging portion 53 in the lateral direction X.
The central notch 71 is located at the center of the back surface reinforcing member 3 and inside the main trunk grooves 95, 95.

The branch groove portions 96, 97 of the flat plate piece 79 communicate with the branch groove portions 96, 97 of the flat plate piece 80 via the central notch 71, and are arranged in the same straight line.
The branch groove portions 98 and 99 of the flat plate piece 80 are aligned in the same linear shape as the branch groove portions 86 and 87 of the end side main body portion 50, and the branch groove portions 98 and 99 of the flat plate piece 79 are of the end side main body portion 52. It is aligned with the branch groove portions 111 and 112 in the same straight line.
Each of the first support portions 88, 100, 100, 113 extends in the vertical direction Y (toward the eaves building) and is parallel to each other.

As shown in FIG. 3, the terminal box 5 includes a housing portion, a positive electrode side cable portion 45, and a negative electrode side cable portion 46, and the take-out wirings 36 and 37 of the solar cell panel 2 are pulled into the housing portion. It is a member connected to the cable portions 45 and 46.

As shown in FIG. 5, the side gasket 6 is a member that integrates the solar cell panel 2 and the back surface reinforcing member 3.
The side gasket 6 has a recess 40 having a “U” cross-sectional shape, and a part of the side end of the solar cell panel 2 and the back surface reinforcing member 3 is inserted into the recess 40 to insert the solar cell panel 2 into the recess 40. And the back surface reinforcing member 3 can be sandwiched so as to be integrated.

Subsequently, the positional relationship of each member of the solar cell module 1 of the first embodiment will be described.

As can be read from FIGS. 4 and 5, in the solar cell module 1, a back surface reinforcing member 3 is adhered to the back surface of the solar cell panel 2 via an adhesive or the like (not shown), and the sun is further formed by the side gasket 6. The side ends of the battery panel 2 and the back surface reinforcing member 3 are sandwiched.
As can be read from FIG. 8, the end side main body portion 50 has a raised portion 60, support wall portions 89, 90, 91, and a first support portion 88 arranged side by side in the circumferential direction along the outer edge thereof. The tip surfaces of the raised portion 60, the support wall portions 89, 90, 91, and the first support portion 88 of the end side main body portion 50 form the same plane, and each supports the back surface of the solar cell panel 2. is doing.
The terminal box 5 is housed in the storage notch 70. The back surface groove portion 75 extends toward the terminal box 5.

In the central body portion 51, a raised portion 61, a support wall portion 101 to 106, and a first support portion 100 are arranged side by side in the circumferential direction along the outer edge thereof. The tip surfaces of each of the raised portions 61, the support wall portions 101 to 106, and the first support portion 100 form the same plane, and each supports the back surface of the solar cell panel 2.

The end-side main body 52 has a raised portion 62, support wall portions 114, 115, 116, and a first support portion 113 arranged side by side in the circumferential direction along the outer edge thereof. The tip surfaces of the raised portions 62, the support wall portions 114, 115, 116, and the first support portion 113 each form the same plane and support the back surface of the solar cell panel 2.

In the solar cell module 1, a ventilation flow path 8 including ventilation passages 120, 121, 122, 123 is formed by the back surface of the solar cell panel 2 and the ventilation groove portions 81, 82, 83, 84 of the back surface reinforcing member 3. ..
The ventilation flow path 8 is a flow path through which a gas can pass, and is a flow path in which the back surface of the solar cell panel 2 is exposed to the gas to be cooled by passing the gas.

The ventilation passage 120 is a flow path formed along the ventilation groove portion 81. The ventilation path 120 is continuous in the vertical direction Y (toward the eaves building) from the eaves side to the ridge side via the first merging path 129, the first branch path 130 or the second branch path 131, and the second merging path 132. is doing.
That is, as shown in FIG. 12A, the ventilation path 120 is the first confluence path from one end (the end on the eaves side), assuming that the wind flows from the eaves side to the ridge side. Entering 129, the first support section 88 branches from the first merging path 129 to the first branch path 130 and the second branch path 131, and when it exceeds the first support section 88, it merges again to form the second merging path 132. A main flow path 125 (first flow path) is formed to reach the other end (end on the ridge side).
Further, as shown in FIG. 12B, the ventilation path 120 includes a third branch path 133 and a fourth branch path 134 branched from the middle stream of the second branch path 131 to the central side. That is, the second branch path 131 is branched into the third branch path 133 and the fourth branch path 134 by the branch groove portions 86 and 87 in the middle thereof. That is, the ventilation path 120 enters the first confluence path 129 from one end (the end on the eaves side) from the eaves side to the ridge side, reaches the second branch path 131, and reaches the third branch path 133 or the fourth. Branch flow paths 126 and 127 (first flow paths) that escape from the branch path 134 to the outside are formed.
As described above, the ventilation passage 120 includes a main main flow path 125 that vertically traverses the main flow path Y, and branch flow paths 126 and 127 that extend in a direction different from the main main flow path 125 and communicate with the outside, and each branch flow path 126 and 127 branch from the middle of the main flow path 125.

As shown in FIG. 12, the ventilation passage 121 is a flow path formed along the ventilation groove 82.
The ventilation path 121 is continuous in the vertical direction Y from the eaves side to the ridge side via the first merging path 141, the first branch path 142, or the second branch path 143. That is, as shown in FIG. 12A, the ventilation path 121 is the first confluence path from one end (the end on the eaves side), assuming that the wind flows from the eaves side to the ridge side. Entering 141, the main flow path 135 (first) is branched from the first merging path 141 to the first branch path 142 and the second branch path 143 by the first support portion 100 and reaches the other end (building side end). Channel) is formed.

Further, as shown in FIG. 12B, the ventilation path 121 includes a third branch path 145 and a fourth branch path 146 branched from the middle stream of the first branch path 142 in the lateral direction X, and further includes a fourth branch path 121. It includes a fifth branch path 147 and a sixth branch path 148 branched in the lateral direction X from the middle stream of the two branch paths 143. That is, the first branch path 142 is branched into the third branch path 145 and the fourth branch path 146 by the branch groove portions 98 and 99 in the middle thereof, and the second branch path 143 is the branch groove portions 96 and 97 in the middle stream thereof. Branches to the 5th branch path 147 and the 6th branch path 148.
That is, assuming that the wind flows from the eaves side to the ridge side, the ventilation path 121 enters from the first confluence path 141 to reach the first branch path 142, and reaches the third branch path 145 or the fourth branch path. Branch flow paths 136 and 137 (second flow paths) that escape from 146 are formed.
Further, as shown in FIG. 12B, the ventilation path 121 enters from the first confluence path 141 and reaches the second branch path 143 when it is assumed that the wind flows from the eaves side to the ridge side. , Branch flow paths 138, 139 (second flow path) that escape from the fifth branch path 147 or the sixth branch path 148 to the outside are formed.
As described above, the ventilation passage 121 includes a main main flow path 135 that vertically traverses the main flow path Y, and branch flow paths 136 to 139 that extend in a direction different from that of the main main flow path 135 and communicate with the outside, and each branch flow path 136 to 139 branch from the middle of the main flow path 135.

Further, the third branch path 145 and the fifth branch path 147 are continuous via the gap 107. That is, a cross flow path that enters from the third branch path 145 and exits from the fifth branch path 147 via the gap 107 is also formed.

The ventilation passage 122 is a flow path formed along the ventilation groove portion 83. Since the ventilation passage 122 is the same as the ventilation passage 121 except that it is symmetrical with respect to the ventilation passage 121, the description thereof will be omitted.

The ventilation passage 123 is a flow path formed along the ventilation groove portion 84.
The ventilation path 123 is continuous in the vertical direction Y (toward the eaves building) from the eaves side to the ridge side via the first merging path 159, the first branch path 160, or the second branch path 161. That is, as shown in FIG. 12A, the ventilation path 123 is the first confluence path from one end (the end on the eaves side), assuming that the wind flows from the eaves side to the ridge side. Entering 159, the main flow path 155 (first) is branched from the first merging path 159 to the first branch path 160 and the second branch path 161 by the first support portion 113 and reaches the other end (building side end). Channel) is formed.

Further, as shown in FIG. 12B, the ventilation path 123 includes a third branch path 163 and a fourth branch path 164 branched from the middle stream of the first branch path 160 in the lateral direction X. That is, the first branch path 160 is branched into the third branch path 163 and the fourth branch path 164 by the branch groove portions 111 and 112 in the middle stream thereof.
That is, when the wind flows from the eaves side to the ridge side, the ventilation path 123 enters from the first merging path 159 to reach the first branch path 160, and from the third branch path 163 or the fourth branch path 164. Branch flow paths 156 and 157 (second flow paths) that escape to the outside are formed.
As described above, the ventilation passage 123 includes a main trunk flow path 155 that traverses in the vertical direction Y and branch flow paths 156 and 157 that extend in a direction different from the main trunk flow path 155 and communicate with the outside, and each branch flow path 156 and 157 branch from the middle of the main flow path 155.

Subsequently, the remaining constituent members of the roof structure 200 of the present embodiment will be described.

The slate roof tile 202 is a known slate roof tile, and is a substantially rectangular flat plate-shaped member formed of natural stone, cement, or the like.
As shown in FIG. 13, the slate roof tile 202 is provided with a plurality of mounting holes 208 near the center in the lateral direction. These mounting holes 208 are arranged side by side in a row in the longitudinal direction.

The eaves edge mounting bracket 205 is a known eaves edge bracket, and as shown in FIG. 17, has a holding recess 213 that can be attached to the eaves to hold the side of the solar cell module 1 on the eaves side.
The holding recess 213 has a substantially "U" -shaped cross section, and is recessed toward the eaves side when attached to the eaves. That is, the internal space of the holding recess 213 is open toward the ridge side.

The intermediate mounting bracket 206 is a member that connects the solar cell modules 1 and 1 adjacent to each other in the eaves direction, and as can be read from FIGS. 14 and 15, the first recess 210, the second recess 211, and the third recess are the third. It is provided with a recess 212.
The first recess 210 is a portion that sandwiches the eaves tip portion of the slate roof tile 202. As can be read from FIG. 15, the first recess 210 has a substantially "U" shape in the side view, and has a first plate portion 215, a second plate portion 216, a first plate portion 215, and a second plate portion 216. It is composed of a connecting plate portion 217 that connects the ends of the above. That is, both the first plate portion 215 and the second plate portion 216 have a flat plate shape and extend in the same direction from the connecting plate portion 217.
The length of the first plate portion 215 in the extending direction from the connecting plate portion 217 is shorter than the length of the second plate portion 216 in the extending direction from the connecting plate portion 217.

The first plate portion 215 is provided with a first through hole 218 that penetrates in the member thickness direction.
The second plate portion 216 is a plate portion located above the first plate portion 215, and includes a second through hole 219 and a fixing through hole 220.
The second through hole 219 is a through hole that penetrates in the thickness direction of the member, and the center thereof substantially coincides with the center of the first through hole 218 of the first plate portion 215.
The fixing through hole 220 is a through hole that penetrates in the member thickness direction, and is a hole for attaching the intermediate mounting bracket 206 to the roof base 250.

The second recess 211 is a recess that opens in the opposite direction (opposite direction) to the first recess 210, and is located on the ridge side of the solar cell module 1b on the eave side among the adjacent solar cell modules 1a and 1b in the eaves building direction. It is the part that sandwiches a part of the side.
As can be read from FIG. 15, the second recess 211 has a substantially "U" shape in the side view, with respect to the second plate portion 216 and the second plate portion 216 which form a part of the first recess 210. It is composed of a third plate portion 221 located above and a connecting plate portion 222 connecting the ends of the second plate portion 216 and the third plate portion 221. That is, a part of the second recess 211 is composed of a plate portion 216 common to the first recess 210. In other words, the top surface of the first recess 210 and the bottom surface of the second recess 211 are formed by the plate portion 216.

The third recess 212 is a recess that opens in the same direction as the first recess 210, and is a part of the eaves-side side of the ridge-side solar cell module 1a among the adjacent solar cell modules 1a and 1b in the eaves-building direction. It is the part that sandwiches.
As can be read from FIG. 15, the third recess 212 has a substantially “U” shape in the side view, with respect to the third plate portion 221 and the third plate portion 221 that form a part of the second recess 211. It is composed of a fourth plate portion 223 located above and a connecting plate portion 224 connecting the ends of the third plate portion 221 and the fourth plate portion 223. That is, a part of the third recess 212 is composed of a plate portion 221 common to the second recess 211.

Subsequently, the positional relationship of each component of the roof structure 200 of the first embodiment will be described.

First, the positional relationship of the foundation roof structure 203 will be described.
In the foundation roof structure 203, as can be read from FIGS. 1 and 16, slate roof tiles 202 are arranged in a row or in a plurality of steps on the roof base. That is, the plurality of slate roof tiles 202 are placed so as to have a flat spread on the roof base.

As shown in FIG. 17, an eaves drain is attached to the eaves of the roof base, and the eaves mounting bracket 205 is placed on the eaves drain.
Two slate roof tiles 202a of the first stage on the eaves side are stacked and attached to the eaves edge mounting bracket 205. Specifically, the slate roof tile 202a-1 located below is mounted on the roof base, and the slate roof tile 202a-2 located above is mounted so as to cover the slate roof tile 202a-1. The slate roof tile 202b of the second stage on the eaves side is arranged in a state where a part thereof is overlapped with the slate roof tile 202a of the first stage on the eaves side. A fastening element such as a nail is inserted into the mounting hole 208 of the slate roof tile 202a and fixed to the roof base.

As shown in FIG. 18, the eaves-side end of the slate roof tile 202c of the third stage is inserted into the first recess 210 of the intermediate mounting bracket 206. The eaves-side end of the slate roof tile 202c covers the first through hole 218 of the first plate portion 215 located inside the first recess 210. That is, in the lower part of the second plate portion 216, the third stage slate roof tile 202c exists in the entire area thereof.

The fixing through hole 220 provided on the rear end side of the second plate portion 216 and the mounting hole 208 of the third stage slate roof tile 202c communicate with each other to form a communication hole, and the communication hole is formed. Fastening elements such as nails are inserted.
The ridge side portion of the intermediate mounting bracket 206 is covered with a slate roof tile 202d located on the ridge side, and the fixing through hole 220 of the second plate portion 216 is covered with the slate roof tile 202d.

Subsequently, the positional relationship between the foundation roof structure 203 and the solar cell module 1 in the roof structure 200 will be described.

In the roof structure 200, as can be read from FIGS. 1 and 19, a plurality of solar cell modules 1 are installed on the foundation roof structure 203 so as to spread out in a plane.

As shown in FIG. 20, the eaves-side first-stage solar cell module 1a has its eaves-side end fitted into the holding recess 213 of the eaves-end mounting bracket 205.
As shown in FIG. 21, the ridge-side end of the solar cell module 1a is fitted into the second recess 211 of the intermediate mounting bracket 206a attached to the second-stage slate roof tile 202b.
That is, in the first stage solar cell module 1a, the side on the eaves side is fitted with the holding recess 213 of the eaves front mounting bracket 205, and the side on the ridge side is fitted with the second recess 211 of the intermediate mounting bracket 206a. Therefore, both sides facing each other are held, and it is in a state where it cannot be separated from the foundation roof structure 203.

Each solar cell module 1a in the first stage on the eaves side is arranged side by side in a direction orthogonal to the eaves building direction (a direction parallel to the building building), and adjacent solar cell modules in a direction orthogonal to the eaves building direction. 1a and 1a are electrically connected by cable portions 45 and 46. Specifically, of the adjacent solar cell modules 1a and 1a, the positive electrode side cable portion 45 of one solar cell module 1a and the negative electrode side cable portion 46 of the other solar cell module 1a are connected.

As shown in FIG. 22, the second-stage solar cell module 1b on the eaves side is fitted into the third recess 212 of the intermediate mounting bracket 206a whose eaves side is located on the eaves side, and the ridge side side thereof. Is fitted into the second recess 211 of the intermediate mounting bracket 206b located on the ridge side.
That is, the solar cell module 1b at the second stage on the eaves side is fitted with the third recess 212 of the intermediate mounting bracket 206a whose eaves side is located on the eaves side, and the ridge side is located on the ridge side. Since it is fitted with the second recess 211 of 206b, both opposite sides of the solar cell module 1b are held, and the solar cell module 1b cannot be separated from the foundation roof structure 203.

Like each solar cell module 1a in the first stage on the eaves side, each solar cell module 1b in the second stage on the eaves side is also arranged side by side in a direction orthogonal to the direction of the eaves building (direction parallel to the building of the building). The solar cell modules 1b and 1b adjacent to each other in the direction orthogonal to the eaves building direction are electrically connected by the cable portions 45 and 46. That is, the connector portion 47 of the cable portion 45 of the solar cell module 1a is connected to the connector portion 48 of the cable portion 46 of the solar cell module 1b adjacent in the girder direction.

Focusing on one solar cell module 1b in the second stage on the eave side, the back surface reinforcing member 3 of the solar cell module 1b straddles the slate roof tiles 202c and 202d adjacent to each other in the eaves direction as shown in FIG. It is arranged. The raised portions 60, 61, 62 of the back surface reinforcing member 3 face the slate roof tile 202c, and the flat plate portions 55, 56, 57 face the slate roof tile 202d. The back surface reinforcing member 3 is mainly located at the overlapping portion of the slate roof tiles 202c and 202d adjacent to the eaves building direction.
Further, the vertical sides 12 and 13 of the solar cell module 1 extend in the direction of the eaves, and the horizontal sides 10 and 11 extend in the direction orthogonal to the eaves direction. In the solar cell module 1, flat plate portions 55, 56, 57 are arranged on the ridge side, and raised portions 60, 61, 62 are arranged on the eaves side.

By the way, the solar cell module 1 of the first embodiment is a crystalline silicon solar cell panel in which the solar cell panel 2 includes a crystalline silicon substrate. Therefore, like a conventional solar cell module provided with a crystalline silicon solar cell panel, it has a characteristic that the power generation efficiency decreases as the temperature rises.

Therefore, according to the solar cell module 1 of the first embodiment, the back surface of the solar cell panel 2 and the back surface reinforcing member 3 form ventilation passages 120, 121, 122, 123 through which gas can pass. Therefore, the solar cell panel 2 can be cooled by passing air through the ventilation passages 120, 121, 122, 123. Therefore, even if the solar cell panel 2 is a crystalline silicon solar cell panel including a crystalline silicon substrate as in the present embodiment, it is possible to suppress a decrease in power generation efficiency.
Further, according to the solar cell module 1 of the first embodiment, since the sealing member 27 forming the back surface of the solar cell panel 2 is formed of a thin sealing film, the photoelectric conversion element 25 has the air passages 120 and 121. , 122, 123 are easily cooled by the air passing through.

According to the solar cell module 1 of the first embodiment, since the ventilation grooves 81 to 84 are formed in the back surface reinforcing member 3, the weight of the back surface reinforcing member 3 can be reduced.
According to the solar cell module 1 of the first embodiment, along the air passages 120 to 123, the raised portions 60 to 62, the support wall portions 89 to 91, 101 to 106, 114 to 116, and the first support portion 88, Since 100 and 113 are provided and they support the back surface of the solar cell panel 2, the load can be supported even when snow or the like is placed on the surface of the solar cell panel 2.

The solar cell module 1 of the roof structure 200 of the first embodiment is inclined so that the raised portions 60, 61, 62 sides of the back surface reinforcing member 3 are located on the eaves side and the flat plate portions 55, 56, 57 sides are located on the ridge side. is doing. Then, a step is formed between the flat plate portions 55, 56, 57 and the raised portions 60, 61, 62. Therefore, when it rains or the like, water may travel on the back surface of the solar cell panel 2 and collect on the vertical wall portions 65, 66, 67 from the flat plate portions 55, 56, 57 of the raised portions 60, 61, 62.
Therefore, according to the solar cell module 1 of the first embodiment, since the back surface groove portions 75 to 78 extending in the inclined direction are provided on the back surface side of the raised portions 60, 61, 62 of the back surface reinforcing member 3, rain or the like. Even when the water falls, water can escape through the groove portions 75 to 78 on the back surface, and it is possible to prevent water from accumulating in the rising portions of the raised portions 60, 61, 62 from the flat plate portions 55, 56, 57.

In the solar cell module 1 of the roof structure 200 of the first embodiment, since each of the ventilation paths 120, 121, 122, 123 is branched from one ventilation path and branched into a plurality of ventilation paths, the solar cell panel 2 Can be cooled with a planar spread.

In the solar cell module 1 of the roof structure 200 of the first embodiment, since a cross flow path through which wind can pass in the lateral direction is formed in a part of the ventilation passages 121 and 122, the solar cell panel is more efficiently used. 2 can be cooled.

Subsequently, the solar cell module 300 of the second embodiment of the present invention will be described. The same configuration as that of the solar cell module 1 of the first embodiment is designated by the same reference numerals and the description thereof will be omitted.

The solar cell module 300 of the second embodiment is a so-called roof tile-integrated solar cell module having a photoelectric conversion function of a solar cell and a fireproof / waterproof function as a roof tile.
As shown in FIG. 23, the solar cell module 300 is laid on the roof base 250 of the foundation roof structure 203 together with a plurality of roof tile members 601 so as to spread in a plane to form the roof structure 600.
As can be read from FIGS. 24 and 25, the solar cell module 300 includes a solar cell panel 301, a back surface reinforcing member 302, and a holding member 303, and is gas by the back surface of the solar cell panel 301 and the back surface reinforcing member 302. The ventilation flow paths 305a to 305d through which the air can pass are formed.

The solar cell panel 301 includes a heat radiating member 311 (heat radiating plate) in addition to the configuration of the solar cell panel 2 of the first embodiment. That is, as shown in FIG. 26, the solar cell panel 301 includes a panel main body 310 corresponding to the solar cell panel 2 of the first embodiment and a heat radiating member 311.

The heat radiating member 311 is a member that dissipates heat generated in the panel main body 310 during power generation, and is also a heat equalizing member that equalizes heat in the surface direction of the panel main body 310. Further, the heat radiating member 311 is also a fire prevention member that prevents the fire from entering the roof base 250 side in the case of a fire in a nearby building or the like in the state where the roof structure 600 is assembled, and prevents the spread of fire.
The heat radiating member 311 is a heat radiating plate made of metal or alloy having a planar spread, and specifically, a galvanium steel plate or a ZAM steel plate.
The heat radiating member 311 has a shape similar to that of the panel main body 310 when viewed in a plan view, and can cover at least the power generation capable region 15 of the panel main body 310 in a state where the solar cell panel 301 is configured. ..
A part of the heat radiating member 311 is cut out, and the heat radiating member 311 is provided with an insertion hole 312 through which the terminal box 5 provided in the panel main body 310 can be inserted.
The insertion hole 312 is a through hole that penetrates the heat radiating member 311 in the member thickness direction.

As shown in FIGS. 25 and 27, the back surface reinforcing member 302 has a bridging portion 355 that bridges a plurality of main body portions 350 to 353 and each main body portion 350 to 353, similarly to the back surface reinforcing member 3 of the first embodiment. It is equipped with ~ 357.
The end-side main body portions 350 and 353 are located on both end portions in the lateral direction X (column direction) and are portions for reinforcing both end portions of the solar cell panel 301.
The central main body portions 351 and 352 are located between the end side main body portions 350 and 353 in the lateral direction X, and are portions for reinforcing the central portion of the solar cell panel 301.
The main body portions 350 to 353 are all raised with respect to the bridging portions 355 to 357 adjacent to each other on the back surface side, forming a raised portion. That is, the thickness of the main body portion 350 to 353 is thicker than the thickness of the bridging portion 355 to 357.

As can be read from FIGS. 25 and 28, ventilation channels 305a to 305d are formed on the surface of each main body 350 to 353 on the light receiving surface 16 side together with the heat radiating member 311 constituting the back surface of the solar cell panel 301. The groove portions 358a to 358d are provided.

When the back surface reinforcing member 302 is viewed in a plan view, the total area of the ventilation grooves 358a to 358d is preferably 8% or more and 50% or less, and 12% or more and 45% or less of the total area of the back surface reinforcing member 302. More preferably.
Within this range, the cooling effect of the solar cell panel 301 can be maintained while maintaining the mechanical strength of the back surface reinforcing member 302.
When the back surface reinforcing member 302 is viewed in a plan view, the total area of the ventilation groove portions 358a to 358d is preferably 2% or more and 20% or less of the area of the front surface side sealing member 26 of the solar cell panel 301. It is preferably% or more and 15% or less.

As shown in FIG. 29, the ventilation groove portion 358a of the end side main body portion 350 includes a main trunk groove portion 360a, branch groove portions 361a to 361c, auxiliary groove portions 365a and 365b, and a confluence groove portion 363a.

The main trunk groove portion 360a is a groove extending from the eaves side end portion of the end end side main body portion 350 toward the ridge side, and one end portion is a groove portion communicating with the outside.
Two first support portions 370a and 370b are arranged side by side in the main trunk groove portion 360a in the vertical direction Y, respectively, and are divided into two divided groove portions 371a and 371b by the first support portions 370a and 370b, respectively.

The first support portions 370a and 370b support the back surface of the solar cell panel 301 and form a part of the inner wall of the ventilation flow path 305a.
As shown in FIG. 29, the first support portions 370a and 370b are each composed of a columnar first wall portion 375 and a rectangular parallelepiped second wall portion 376, and the second wall portion 376 is a second wall portion 376. 1 It extends in the radial direction from a part of the outer peripheral surface of the wall portion 375.
The first wall portions 375 and 375 of the first support portions 370a and 370b are provided in the middle portion in the vertical direction Y, and the second wall portion 376 of the first support portion 370a and the second wall of the first support portion 370b. The portions 376 extend in a direction away from each other. That is, the second wall portion 376 of the first support portion 370a extends from the first wall portion 375 toward the end on the eaves side, and the second wall portion 376 of the first support portion 370b is the first wall portion 375. It extends from to the ridge side.
There is a gap 377 between the first wall portion 375 of the first support portion 370a on the eaves side and the first wall portion 375 of the first support portion 370b on the ridge side, and the dividing groove portions 371a and 371b pass through the gap 377. It is continuous with each other.

From another point of view, the dividing groove portions 371a and 371b extend along the outer circumferences of the first support portions 370a and 370b, and two arc-shaped portions along the outer circumferences of the first support portions 370a and 370b, respectively. The groove portions 380 and 381 are provided. That is, the groove portions 380 and 381 are grooves having an arc portion and a straight portion, respectively, and the arc portions are connected to each other.

As shown in FIG. 29, the branch groove portion 361a is a groove extending from the outer end portion of the end side main body portion 350 in the lateral direction X toward the division groove portion 371a of the main trunk groove portion 360a, and is formed in the groove portion 381. It is a groove that joins.
The branch groove portions 361b and 361c are grooves that extend inclined from the inner end portion of the end side main body portion 350 in the lateral direction X toward the division groove portion 371b of the main trunk groove portion 360a, and are grooves that join the groove portions 380 and 381, respectively. Is.
The branch groove portions 361a to 361c are grooves branched from the main trunk groove portion 360a, assuming that the main trunk groove portion 360a is the main body, and the end portions thereof are continuous with the outside.

Further, the branch groove portions 361a to 361c are inclined with the horizontal X component and the vertical Y component, respectively. That is, the branch groove portions 361a to 361c are inclined with the girder direction component and the eaves ridge direction component, respectively.
When the roof structure 600 is assembled, the branch groove portion 361a approaches the dividing groove portion 371a of the main trunk groove portion 360a from the eaves side to the ridge side, and is connected to the groove portion 381 of the dividing groove portion 371a at the most ridge side portion. ing. Similarly, when the roof structure 600 is assembled, the branch groove portions 361b and 361c approach the split groove portion 371b of the main trunk groove portion 360a from the eaves side to the ridge side, and the split groove portion 371b is located at the most ridge side portion. It is connected to the grooves 380 and 381.

As shown in FIG. 29, the auxiliary groove portions 365a and 365b are groove portions provided independently of the main trunk groove portion 360a, and are linear from one end (the end on the eaves side) toward the confluence groove 363a. It is an extended groove. One end of the auxiliary groove portions 365a and 365b is continuous with the outside, and the other end portion is continuous with the confluence groove portion 363a.
The auxiliary groove portions 365a and 365b are located near the bridging portion 355 side and are arranged at predetermined intervals in the lateral direction X. The auxiliary groove portions 365a and 365b extend toward the eaves when the roof structure 600 is formed.

As shown in FIG. 29, the merging groove portion 363a is a connecting groove portion extending in the lateral direction X and connected to the ridge side ends of the main trunk groove portion 360a and the auxiliary groove portions 365a and 365b, respectively. That is, the merging groove portion 363a is continuous with the branch groove portions 361a to 361c via the main trunk groove portion 360a. The merging groove portion 363a extends over the entire lateral direction X of the end side main body portion 350, and both end portions thereof are continuous with the outside.
A part of the ridge-side frame portion 506 can be inserted into the merging groove portion 363a, and the ridge-side frame portion 506 is also a drop-out prevention groove for preventing the ridge-side frame portion 506 from falling out of the solar cell panel 301.

As shown in FIG. 29, the end side main body portion 350 includes support wall portions 385a to 385e.
The support wall portions 385a to 385e all support the back surface of the solar cell panel 301 and form the inner wall of the ventilation groove portion 358a.
The support wall portion 385a is an island-shaped wall portion surrounded by the groove portions 380, 381 and the branch groove portion 361a of the dividing groove portion 371a.
The support wall portion 385b is a wall portion separated from the others by a branch groove portion 361a, a groove portion 381 of the dividing groove portion 371a, and a merging groove portion 363a.
The support wall portion 385c is an island-shaped wall portion surrounded by the groove portion 380 of the split groove portion 371b and the branch groove portion 361b.
The support wall portion 385d is an island-shaped wall portion surrounded by the groove portions 380, 381 and the branch groove portions 361b, 361c of the dividing groove portion 371b.
The support wall portion 385e is a wall portion separated from the others by a branch groove portion 361c, a groove portion 381 of the dividing groove portion 371b, and a merging groove portion 363a, and auxiliary groove portions 365a and 365b are formed.

As shown in FIG. 30, the ventilation groove portion 358b of the central side main body portion 351 includes main trunk groove portions 360b and 360c, branch groove portions 361d to 361j, a crosspiece fixing groove 362, and a confluence groove portion 363b.
As shown in FIG. 30, the main trunk groove portions 360b and 360c are grooves extending from the eaves side end portion of the central side main body portion 351 toward the ridge side, similarly to the main trunk groove portion 360a of the end side main body portion 350. One end is a groove that communicates with the outside.
Two first support portions 370a and 370b are arranged side by side in the main trunk groove portions 360b and 360c, and the main trunk groove portions 360b and 360c are divided into two divided groove portions 371a and 371b by the first support portions 370a and 370b, respectively.

As shown in FIG. 30, the branch groove portions 361d and 361e are grooves extending from the outer end portion of the central side main body portion 351 in the lateral direction X toward the split groove portion 371a of the main trunk groove portion 360b, and the branch groove portions 361d and 361e. It is a groove that joins the groove portions 380 and 381 of 371a, respectively.
The branch groove portion 361f is a groove extending from the crosspiece fixing groove 362 toward the split groove portion 371b of the main trunk groove portion 360b, and is a groove that joins the groove portion 381 of the split groove portion 371b.
The branch groove portions 361g and 361h are grooves that extend from the crosspiece fixing groove 362 toward the division groove portion 371a of the main trunk groove portion 360c, and are grooves that join the groove portions 380 and 381 of the division groove portion 371a.
The branch groove portions 361i and 361j are grooves extending from the inner end portion of the central main body portion 351 in the lateral direction X toward the split groove portion 371b of the main trunk groove portion 360c, and are formed in the groove portions 380 and 381 of the split groove portions 371b, respectively. It is a groove that joins.
The branch groove portions 361d to 361j are grooves branched from the main trunk groove portions 360b and 360c, assuming that the main trunk groove portions 360b and 360c are the main components, and the ends thereof are continuous with the outside.

The branch groove portions 361d to 361j are inclined with the horizontal X component and the vertical Y component, respectively. That is, the branch groove portions 361d to 361j are inclined with the girder direction component and the eaves ridge direction component, respectively.
When the roof structure 600 is assembled, the branch groove portions 361d and 361e approach the division groove portion 371a of the main trunk groove portion 360b from the eaves side to the ridge side, and the groove portion 380 of the division groove portion 371a at the most ridge side portion. It is connected to 381. Similarly, the branch groove portion 361f approaches the dividing groove portion 371b of the main trunk groove portion 360b from the eaves side to the ridge side, and is connected to the groove portion 381 of the dividing groove portion 371b at the most ridge side portion.
When the roof structure 600 is assembled, the branch groove portions 361g and 361h approach the division groove portion 371a of the main trunk groove portion 360c from the eaves side to the ridge side, and the groove portion 380 of the division groove portion 371a at the most ridge side portion. It is connected to 381. The branch groove portions 361i and 361j approach the division groove portion 371b of the main trunk groove portion 360c from the eaves side to the ridge side, and are connected to the groove portion 381 of the division groove portion 371b at the most ridge side portion.

As shown in FIG. 25, the crosspiece fixing groove 362 is a groove for adhering the reinforcing bar 509 (reinforcing bar 510), and is a groove extending linearly in the vertical direction Y.
The crosspiece fixing groove 362 has a width equal to or larger than the width of the reinforcing bar 509 (reinforcing bar 510), and the reinforcing bar 509 (reinforcing bar 510) can be inserted.

As shown in FIG. 30, the merging groove portion 363b is a connecting groove portion extending in the lateral direction X and connected to each of the ridge-side end portions of the main trunk groove portions 360b and 360c and the ridge-side end portion of the crosspiece fixing groove 362. That is, the merging groove portion 363b is continuous with the branch groove portions 361d to 361j via the main trunk groove portions 360b, 360c or the crosspiece fixing groove 362. The merging groove portion 363b extends over the entire lateral direction X of the central side main body portion 351 and both ends thereof are continuous with the outside.
A part of the ridge-side frame portion 506 can be inserted into the merging groove portion 363b, and the ridge-side frame portion 506 is also a drop-out prevention groove for preventing the ridge-side frame portion 506 from falling out of the solar cell panel 301.

As shown in FIG. 30, the central main body portion 351 includes support wall portions 385f to 385q.
The support wall portions 385f to 385q support the back surface of the solar cell panel 301 and form the inner wall of the ventilation flow path 305b.
The support wall portion 385f is an island-shaped wall portion surrounded by the groove portion 380 and the branch groove portion 361d of the split groove portion 371a of the main trunk groove portion 360b and isolated.
The support wall portion 385 g is an island-shaped wall portion surrounded by the groove portions 380, 381 and the branch groove portions 361d, 362e of the divided groove portion 371a of the main trunk groove portion 360b.
The support wall portion 385h is a wall portion separated from the others by a branch groove portion 361e, a groove portion 381 of the division groove portion 371a of the main trunk groove portion 360b, and a merging groove portion 363b.
The support wall portion 385i is an island-shaped wall portion surrounded by the groove portion 380 of the split groove portion 371b of the main trunk groove portion 360b and the crosspiece fixing groove 362.
The support wall portion 385j is an island-shaped wall portion surrounded by the groove portions 380, 381 of the split groove portion 371b of the main trunk groove portion 360b, the branch groove portion 361f, and the crosspiece fixing groove 362.
The support wall portion 385k is an island-shaped wall portion surrounded by a branch groove portion 361f, a groove portion 381 of the division groove portion 371b of the main trunk groove portion 360b, a crosspiece fixing groove 362, and a confluence groove portion 363b.
The support wall portion 385l is an island-shaped wall portion surrounded by a groove portion 380 of the split groove portion 371a of the main trunk groove portion 360c, a branch groove portion 361 g, and a crosspiece fixing groove 362.
The support wall portion 385 m is an island-shaped wall portion surrounded by the groove portions 380, 381 of the split groove portion 371a of the main trunk groove portion 360c, the branch groove portions 361 g, 361 h, and the crosspiece fixing groove 362.
The support wall portion 385n is an island-shaped wall portion surrounded by a branch groove portion 361h, a groove portion 381 of the division groove portion 371a of the main trunk groove portion 360b, a merging groove portion 363b, and a crosspiece fixing groove 362.
The support wall portion 385o is an island-shaped wall portion surrounded by the groove portion 380 and the branch groove portion 361i of the split groove portion 371b of the main trunk groove portion 360c and isolated.
The support wall portion 385p is an island-shaped wall portion surrounded by the groove portions 380, 381 and the branch groove portions 361i, 361j of the split groove portion 371b of the main trunk groove portion 360c.
The support wall portion 385q is an island-shaped wall portion surrounded by a groove portion 381, a branch groove portion 361j, and a confluence groove portion 363b of the main trunk groove portion 360c.

The ventilation groove portion 358c of the central side main body portion 352 has a symmetrical relationship with the ventilation groove portion 358b of the central side main body portion 351. And the merging groove portion 363b is provided.

The ventilation groove portion 358d of the end side main body portion 353 has a substantially symmetrical relationship with the ventilation groove portion 358a of the end side main body portion 350, and is different only in that the auxiliary groove portions 365a and 365b are not provided. That is, the ventilation groove portion 358d includes a main trunk groove portion 360a, branch groove portions 361a to 361c, and a confluence groove portion 363a.

Focusing on the back surface side of the back surface reinforcing member 302, the back surface reinforcing member 302 can fix the connector portions 47, 48 of the cable portions 45, 46 provided on the solar cell panel 301, as shown in FIG. 28 (b). The connector fixing grooves 400a and 400b (cable holding portions), the balance holding grooves 402a and 402b, and the wiring holding grooves 401a to 401c for holding the wiring portions 49 of the cable portions 45 and 46 are provided.

The connector fixing groove 400a is provided in the end side main body portion 350, and at least a part thereof is a long groove extending in the lateral direction X, and can be fitted with the connector portions 47, 48 of the cable portions 45, 46.
The connector fixing groove 400b is provided in the central main body portion 351 and is a long groove having at least a part extending in the lateral direction X, and can be fitted with the connector portions 47 and 48 of the cable portions 45 and 46.

The balance holding grooves 402a and 402b are grooves for balancing the weight of the back surface reinforcing member 302.
The balance holding groove 402a is a long groove provided in the central main body portion 352 and at least a part thereof extends in the lateral direction X. The balance holding groove 402a has substantially the same shape as the connector fixing groove 400b.
The balance holding groove 402b is a long groove provided in the end side main body portion 353 and at least a part thereof extends in the lateral direction X.

The wiring holding grooves 401a to 401c are grooves extending outward from the connector fixing grooves 400a and 400b and the balance holding groove 402b when viewed in a plan view, with respect to the connector fixing grooves 400a and 400b and the balance holding groove 402b. It is a notch extending in the direction of intersection.
The wiring holding grooves 401a to 401c can hold the wiring portions of the cable portions 45 and 46.

As can be read from FIGS. 24 and 31, the holding member 303 includes frame portions 505 and 508 extending along the four sides of the solar cell panel 301, and reinforcing bars 509 and 510 connecting the frame portions 505 and 506. ..
The eaves side frame portion 505 is a horizontal frame extending in the lateral direction X, and is an eaves side holding portion that holds the eaves side end portion of the solar cell panel 301 when the roof structure 600 is constructed.

As shown in FIG. 31, the eaves side frame portion 505 includes a holding recess 520, an eaves side engaging portion 521, and an eaves side connecting portion 522,523 as a main configuration.
The holding recess 520 is a recess that can be fitted to the eaves side end of the solar cell panel 301. Specifically, the holding recess 520 is a recess having a substantially "U" -shaped cross section, has a depth toward the eaves side, and extends in the girder direction (horizontal direction X of the solar cell panel 301). It is a groove.
The eaves side engaging portion 521 is located on the back surface side of the solar cell panel 301, and when the roof structure 600 is configured, a part of the ridge side frame portion 506 or the eaves of another solar cell module 300 adjacent to the eaves side. It can be engaged with the metal fitting 591. Specifically, the eaves-side engaging portion 521 is a recess having a substantially "U" -shaped cross section, and by inserting the ridge-side engaging portion 531 of the side frame portion 506, the ridge-side engaging portion is engaged in the vertical direction. It has a plate-shaped portion that can be engaged with the portion 531.
The eaves side connecting portion 522, 523 is a portion to which one end (eaves side end) of the reinforcing bars 509 and 510 can be connected. The eaves-side connecting portions 522 and 523 are intermediate portions in the longitudinal direction of the eaves-side frame portion 505, and are arranged at predetermined intervals.

As shown in FIG. 31, the ridge-side frame portion 506 is a horizontal frame extending in the lateral direction X, and is a ridge-side holding that holds the ridge-side end of the solar cell panel 301 when the roof structure 600 is constructed. It is a department.
The ridge-side frame portion 506 includes a holding recess 530, a ridge-side engaging portion 531, a ridge-side connecting portion 532, 533, and a mounting hole 535.
The holding recess 530 is a recess that can be fitted to the ridge-side end of the solar cell panel 301. Specifically, the holding recess 530 is a recess having a substantially "U" -shaped cross section, has a depth on the ridge side, and extends in the girder direction (width direction of the solar cell panel 301). ..
The ridge-side engaging portion 531 is located on the light receiving surface 16 side of the solar cell panel 301, and is an engaging portion paired with the eaves-side engaging portion 521 of the eaves-side frame portion 505. When the roof structure 600 is constructed, the ridge-side engaging portion 531 can be engaged with the eaves-side engaging portion 521 of another solar cell module 300 adjacent to the ridge side.
The ridge-side connecting portion 532, 533 is a portion that is paired with the eaves-side connecting portion 522, 523 and can connect the other end (building-side end) of the reinforcing bars 509 and 510. The ridge-side connecting portions 532 and 533 are intermediate portions in the longitudinal direction of the ridge-side frame portion 506, and are arranged at predetermined intervals.
As shown in FIG. 32, the mounting hole 535 is a hole for mounting to the roof base 250 of the foundation roof structure 203 by the fastening element 602, and is a through hole penetrating in the thickness direction.

As shown in FIG. 31, the left frame portion 507 is a support member that supports the back surface of the solar cell panel 301, and is located on the left side of the solar cell panel 301 when the light receiving surface 16 of the solar cell panel 301 is viewed in a plan view. It extends along. The left frame portion 507 is also a connecting portion that connects the eaves side frame portion 505 and the ridge side frame portion 506 in the eaves building direction when the roof structure 600 is constructed.

As shown in FIG. 31, the right frame portion 508 is a support member that supports the back surface of the solar cell panel 301, and is located on the right side of the solar cell panel 301 when the light receiving surface 16 of the solar cell panel 301 is viewed in a plan view. It extends along. The right frame portion 508 is also a connecting portion that connects the eaves side frame portion 505 and the ridge side frame portion 506 in the eaves building direction when the roof structure 600 is constructed.

As shown in FIG. 31, the reinforcing bars 509 and 510 are reinforcing bars that connect the eaves side frame portion 505 and the ridge side frame portion 506 to reinforce the rigidity of the solar cell panel 301.
The reinforcing bars 509 and 510 are made of metal and are elongated plate-shaped portions extending in the vertical direction Y.
One end of the reinforcing bars 509 and 510 in the longitudinal direction can be connected to the eaves side connection portion 522, 523 of the eaves side frame portion 505, and the other end is connected to the ridge side frame portion 506 on the ridge side. It can be connected to units 532 and 533.

Subsequently, the positional relationship of each component of the solar cell module 300 will be described.

As shown in FIG. 32, the solar cell panel 301 has an eaves-side end inserted into the holding recess 520 of the eaves-side frame portion 505, and a ridge-side end inserted into the holding recess 530 of the ridge-side frame portion 506. There is.
The left end of the solar cell panel 301 is mounted on the left frame portion 507, and the right end portion is mounted on the right frame portion 508.
The reinforcing bars 509 and 510 are adhered to the crosspiece fixing grooves 362 and 362 of the back surface reinforcing member 302 with an adhesive, and a gap is formed between the back surface of the solar cell panel 301 and the reinforcing bars 509 and 510. ..
In this embodiment, a double-sided adhesive tape is used as the adhesive material.
As shown in FIG. 24, most or all of the vertical sides 12 and 13 which are short sides of the solar cell panel 301 facing in the longitudinal direction are directly visible. That is, most or all of the vertical sides 12 and 13 are not covered by the holding member 303.

Subsequently, the positional relationship of each component of the roof structure 600 will be described.

In the roof structure 600, a plurality of solar cell modules 300 are directly fixed to the roof base 250 of the foundation roof structure 203.
In the roof structure 600, as shown in FIG. 23, a plurality of eaves metal fittings 591 are attached to the tile rail 590 of the foundation roof structure 203, and the tile member 601 and the solar cell module 300 are laid on the foundation roof structure 203. There is.
As shown in FIG. 32, the roof structure 600 is a back surface reinforcing member located under the ridge side frame portion 506 (506A, 506B, ...) Of each solar cell module 300 (300A, 300B, ...). It is mounted on the tile bar 592 of the foundation roof structure 203 via 302, and the fastening element 602 is mounted on the ridge side frame portion 506 (506A, 506B, ...) Of each solar cell module 300 (300A, 300B, ...). ...) Is inserted through the mounting hole 535 and placed in the tile rod 592.

In the solar cell module 300B and the solar cell module 300A located on the eaves side, the eaves side frame portion 505B of the ridge side solar cell module 300B is placed on the ridge side frame portion 506A. That is, a part of the solar cell module 300A and the solar cell module 300B overlap in a direction orthogonal to the light receiving surface 16. In the eaves side frame portion 505B of the solar cell module 300B on the ridge side, the eaves side engaging portion 521 engages with the ridge side engaging portion 531 of the ridge side frame portion 506A of the solar cell module 300A on the eaves side in the overlapping direction. There is.
In the solar cell module 300B, the eaves side frame portion 505C of the ridge side solar cell module 300C is placed on the ridge side frame portion 506B.
In the ridge-side frame portion 506B of the solar cell module 300B, the ridge-side engaging portion 531 is engaged with the eaves-side engaging portion 521 of the eaves-side frame portion 505C of the ridge-side solar cell module 300C in the overlapping direction.

Further, in the solar cell module 300D fixed straddling the tile member 601 and the solar cell module 300, as can be read from FIG. 33, the eaves side engaging portion 521 of the eaves side frame portion 505 is fixed to the tile member 601. It is engaged with each of the engaging portion 606 of the metal fitting 605 and the ridge-side engaging portion 531 of the ridge-side frame portion 506. Therefore, the solar cell module 300D partially overlaps with the other solar cell module 300 and the fixing bracket 605, and the movement in the vertical direction is restricted by the engaging portion 606 of the other solar cell module 300 and the fixing bracket 605. There is.

Focusing on the column direction, the left frame portion 507 of the solar cell module 300A is covered with the right frame portion 508 of the solar cell module 300E adjacent to the left side, as can be read from FIGS. 34 (a) and 34 (b). There is. That is, the left frame portion 507 of the solar cell module 300A is covered with its own solar cell panel 301 when the light receiving surface 16 is viewed in a plan view, and the right frame portion 508 is its own solar cell panel 301 and other solar cell panels 301. It is hidden by the solar cell panel 301 of the solar cell module 300E.
The left end surface of the solar cell panel 301 of the solar cell module 300A faces the right end surface of the solar cell panel 301 of the solar cell module 300E adjacent to the left side. In the present embodiment, a slight gap is formed between the left end surface of the solar cell panel 301 of the solar cell module 300A and the right end surface of the solar cell panel 301 of the solar cell module 300E adjacent to the left side. The width of the gap is preferably 1.5 cm or less.
The light receiving surface 16 of the solar cell module 300A is located on the same plane as the light receiving surface 16 of the solar cell module 300E. That is, the light receiving surface 16 of the solar cell module 300A and the light receiving surface 16 of the solar cell module 300E are flush with each other, forming one light receiving surface extending in the longitudinal direction of the solar cell panel 301 of the solar cell module 300A. There is.

Here, as described above, in the solar cell module 300, the ventilation flow path 305 composed of the ventilation passages 550a to 550d is formed by the ventilation grooves 358a to 358d of the back surface of the solar cell panel 301 and the back surface reinforcing member 302. ing.
Like the ventilation flow path 8 of the first embodiment, the ventilation flow path 305 is a flow path through which gas can pass, and by passing the cooling gas, the back surface of the solar cell panel 301 is exposed to the cooling gas. It is a flow path for cooling.

The ventilation passages 550a to 550d are flow paths formed along the back surface of the solar cell panel 301 and the ventilation groove portions 358a to 358d.

As shown in FIG. 35, the ventilation passage 550a includes a main trunk flow path 560a corresponding to the main trunk groove portion 360a of the end side main body portion 350, a branch flow path 561a to 561c corresponding to the branch groove portions 361a to 361c, and an end portion. It is provided with a merging flow path 563a corresponding to the merging groove portion 363a of the side main body portion 350, and auxiliary flow paths 565a and 565b corresponding to the auxiliary groove portions 365a and 365b of the end side main body portion 350.

As shown in FIG. 36, the ventilation passages 550b and 550c have a main trunk flow path 560b and 560c corresponding to the main trunk groove portions 360b and 360c of the central main body portions 351 and 352 and a branch groove portion 361d of the central main body portions 351 and 352. Branch flow paths 561d to 561j corresponding to ~ 361j, merging flow paths 563b corresponding to the merging groove portions 363b of the central main body portions 351 and 352, and crosspiece fixing corresponding to the crosspiece fixing grooves 362 of the central main body portions 351 and 352. It is provided with a flow path 562.

As shown in FIG. 35, the ventilation passage 550d includes a main trunk flow path 560a corresponding to the main trunk groove portion 360a of the end side main body portion 352, a branch flow path 561a to 561c corresponding to the branch groove portions 361a to 361c, and an end portion. A merging flow path 563a corresponding to the merging groove portion 363a of the side main body portion 350 is provided.

The main flow paths 560a, 560b, and 560c are provided with division flow paths 570a and 570b corresponding to the division groove portions 371a and 371b, respectively.
The divided flow paths 570a and 570b are provided with flow paths 527 and 573 corresponding to the groove portions 380 and 381, respectively.

As shown in FIG. 35 (a), it is assumed that the wind flows from the eaves side to the ridge side in the ventilation passages 550a and 550d composed of the back surface of the solar cell panel 301 and the main body portions 350 and 353 on the end side. Then, as the main flow path, one end (the end on the eaves side) enters the divided flow paths 570a and 570b of the main flow path 560a into the flow paths 527 and 572, and the gap 377 of the divided flow paths 570a and 570b allows the main flow path to enter. Join once. After that, due to the presence of the first support portion 370b, it branches into the flow paths 573 and 573 of the second divided flow paths 571a and 571b to reach the merging flow path 563a, passes through the merging flow path 563a, and is external from both ends in the girder direction. Flow to.
Further, as shown in FIG. 35B, the ventilation passages 550a and 550d enter from the branch flow path 561a as the first sub-flow path that joins the main flow path from the outside, and the divided flow path 570a of the main flow path 560a. It joins in the middle of the flow path 573.
The ventilation passages 550a and 550d enter from the branch flow paths 561b and 561c as the second sub-flow paths that join the main flow path from the outside, and merge in the middle of the flow paths 527 and 573 of the split flow path 570b of the main flow path 560a. ..
Further, the ventilation passages 550a and 550d enter the auxiliary flow paths 565a and 565b from the eaves side end as independent flow paths and join the merging flow path 563a.

As shown in FIG. 36A, it is assumed that the air passages 550b and 550c composed of the back surface of the solar cell panel 301 and the central main body 351 and 352 flowed from the eaves side to the ridge side. Occasionally, as the main flow path, one end (the end on the eaves side) enters the divided flow paths 570a, 570b, 570a, 570b of the main flow paths 560b and 560c, and enters the flow paths 527,572,572,527 The roads 570a, 570b, 570a, and 570b meet once through the gaps 377. After that, due to the presence of the first support portions 370b and 370b, the second divided flow paths 570a, 570b, 570a and 570b are branched into the flow paths 573, 573, 573 and 573 to reach the merging flow path 563b, and the merging flow path 563b is formed. It passes and flows to the outside from the end in the girder direction.
The ventilation passages 550b and 550c enter the crosspiece fixed flow path 562 from one end (the end on the eaves side) as the second main flow path, pass through the crosspiece fixed flow path 562, reach the merging flow path 563b, and merge. It passes through the road 563b and flows to the outside from both ends in the girder direction.

As shown in FIG. 36B, the ventilation passages 550b and 550c enter from the branch flow paths 561d and 561e as the third sub-flow passages that join the main flow path from the outside, and the divided flow paths 570a of the main flow path 560b. It joins in the middle of the flow paths 527 and 573.
The ventilation passages 550b and 550c merge directly from the crosspiece fixed flow path 562 into the middle of the flow path 572 of the split flow path 570b of the main flow path 560b as the fourth sub-flow path that joins the main flow path from the second main flow path.
The ventilation passages 550b and 550c serve as a fifth auxiliary flow path that joins the main flow path from the second main flow path. Join in the middle.
The ventilation passages 550b and 550c serve as a sixth auxiliary flow path that joins the main flow path from the second main flow path, and is a flow of the split flow path 570a of the main flow path 560c from the crosspiece fixed flow path 562 via the branch flow paths 561g and 561h. It joins in the middle of roads 527 and 573.
The ventilation passages 550b and 550c enter from the branch flow paths 561i and 561j as the seventh sub-flow paths that join the main flow path from the outside, and merge in the middle of the flow paths 527 and 573 of the split flow path 570b of the main flow path 560c. ..

Subsequently, in the solar cell module 300, the positional relationship of each part when the connector parts 47 and 48 of the cable parts 45 and 46 are fixed to the connector fixing grooves 400a and 400b will be described.

As shown in FIG. 27, in one of the cable portions 46 extending from the terminal box 5, the wiring portion passes through the ridge side of the connector fixing groove 400b and further passes through the wiring holding groove 401a. Then, the connector portion 48 is fitted with the connector fixing groove 400a.
The other cable portion 45 extending from the terminal box 5 extends in the direction opposite to that of the one cable portion 46 in the lateral direction X, the wiring passes through the ridge side of the balance holding groove 402a, and the wiring holding groove 401c is further formed. It has passed and turned back. The folded portion passes through the eaves side of the balance holding groove 402a and further passes through the wiring holding groove 401b. Then, the connector portion 47 is fitted with the connector fixing groove 400b.

According to the solar cell module 300 of the second embodiment, the solar cell panel 301 has the heat radiating member 311 and the heat radiating member 311 is exposed to a cooling gas such as air, so that the temperature of the solar cell panel 301 rises during power generation. Can be suppressed.

According to the solar cell module 300 of the second embodiment, since the plate-shaped heat radiating member 311 is provided on the back surface of the solar cell panel 301, even if the fire type is scattered on the solar cell panel 301 in the event of a fire, the fire type is generated. It is blocked by the heat radiating member 311 and can prevent the fire from spreading to the member on the back surface side of the heat radiating member 311 or the roof base. Therefore, the fire protection performance is high.

According to the solar cell module 300 of the second embodiment, since the solar cell panel 301 is provided with the heat radiating member 311 on the back surface of the panel main body 310, the heat radiating member 311 contributes to stress relaxation of the panel main body 310 and the panel main body 310. Damage due to stress of 310 can be prevented.

According to the solar cell module 300 of the second embodiment, the connector fixing grooves 400a and 400b and the wiring holding grooves 401a to 401c are provided on the back surface of the back surface reinforcing member 302. Therefore, when the solar cell panel 301 is carried into the work site or the like, the cable portions 45 and 46 of the solar cell panel 301 are passed through the wiring holding grooves 401a to 401c and the connector portions 47 and 48 are fixed to the connector fixing grooves 400a and 400b. The tape for fixing the cable portions 45 and 46 can be omitted, which contributes to resource saving, and the cable portions 45 and 46 are less likely to interfere with the carry-in work and the like, and the workability is improved as compared with the conventional case. In addition, it is possible to prevent the solar cell panel 301 from cracking due to vibration during transportation or collision with the cable portions 45 and 46.

According to the solar cell module 300 of the second embodiment, the eaves side frame portion 505 and the ridge side frame portion 506 are connected by the left side frame portion 507 and the right side frame portion 508, and two reinforcing bars 509 and 510 are further connected. Reinforced by. Therefore, when a blowing force acts on the solar cell module 300, the movement of the eaves side frame portion 505 and the ridge side frame portion 506 in the direction in which they are separated from each other can be restricted.

According to the roof structure 600 of the second embodiment, the eaves side frame portion 505 of the ridge side solar cell module 300B is placed on the ridge side frame portion 506 of the eaves side solar cell module 300A adjacent to the eaves building direction. Then, the eaves-side engaging portion 521 of the ridge-side solar cell module 300B engages with the ridge-side engaging portion 531 of the eaves-side solar cell module 300A in the overlapping direction, and the eaves-side solar cell module 300A is in the vertical direction. Restricts movement to. Therefore, even if a blowing force acts on the solar cell module 300A on the eaves side, the solar cell module 300A on the eaves side is separated from the roof base 250 by the own weight of the solar cell module 300B on the ridge side and the engaging portion 521 on the eaves side. Can be prevented.

According to the roof structure 600 of the second embodiment, as shown in FIG. 34 (a), only the light receiving surfaces 16 and 16 of the solar cell modules 300A and 300E adjacent to each other in the girder direction are substantially continuous in the girder direction. It forms a plane. Therefore, it is difficult to see the seams of the light receiving surfaces 16 and 16 of the solar cell modules 300A and 300E adjacent to each other in the girder direction, and the user has the impression that the light receiving surfaces of each solar cell module 300 extend in a series in the girder direction. Can be given. Therefore, according to the roof structure 600 of the second embodiment, the roof structure has a good design.

In the above-described embodiment, a crystalline solar cell panel on which a crystalline silicon solar cell is mounted is used as the solar cell panel 2, but the present invention is not limited to this, and other types of solar cell panels are used. You may. For example, as the solar cell panel 2, a thin-film solar cell panel may be used.

In the above embodiment, air is passed through the ventilation flow path 8 for cooling the solar cell panel 2, but the present invention is not limited to this, and an inert gas such as nitrogen gas is used for ventilation. It may flow through the flow path 8.

In the above-described embodiment, the case of the frameless solar cell module without the frame has been described, but the present invention is not limited to this, and the frame may be provided on the solar cell panel as usual.

In the above-described embodiment, the solar cell module 1 is provided on the roof of the building, but the present invention is not limited to this, and if the solar cell module 1 can be installed in an inclined posture, the solar cell module 1 can be installed. The location does not matter. For example, the solar cell module 1 may be provided on a gantry or the like.

In the first embodiment described above, the main flow path 125 extends from one end (horizontal side 10) side in the inclination direction to the other end (horizontal side 11) side, but the main main flow path 125 is one. The extension direction of the main flow path 125 is not particularly limited as long as it reaches from the end side to the other end side. For example, the main flow path 125 may extend from one end (vertical side 12) side facing the direction intersecting the inclination direction to the other end (vertical side 13) side.

In the second embodiment described above, the connector fixing grooves 400a and 400b, which are bottomed holes for fixing the cable, are provided on the back surface side of the back surface reinforcing member 302, but the present invention is not limited thereto. The connector fixing grooves 400a and 400b may be through grooves or notches.
Further, in the second embodiment described above, the balance holding grooves 402a and 402b are provided in order to balance the weight of the back surface reinforcing member 302, but the present invention is not limited to this. Both the balance holding grooves 402a and 402b may be used as the connector fixing grooves.

1,300 Solar cell module 2,301 Solar cell panel 3,302 Backside reinforcement member 8,305 Ventilation flow path 10,11 Side side (long side)
12, 13 Vertical side (short side)
16 Light receiving surface 26 Front side sealing member 27 Back side sealing member 60 to 62 Raised part 75 to 78 Back side groove part 81 to 84,358 Ventilation groove part 85, 95, 110, 360 Main trunk groove part 86, 87, 96 to 99, 111,112,361 Branch groove 88,100,113,370 First support 89-91,101-106,114-116 Support wall (second support)
120-123,550 Ventilation passages 125, 135, 155, 560 Main flow path (first flow path)
126,127,136-139,156,157,571 Branch flow path (second flow path)
200,600 Roof structure 202 Slate tile (tile member)
203 Foundation roof structure 206 Intermediate mounting bracket (mounting bracket)
210 1st recess 211 2nd recess 212 3rd recess 216 2nd plate (common member)
311 Heat dissipation member (heat sink)
350-353 Main body (raised part)
400a, 400b Connector fixing groove (cable holding part)
401a, 401b, 401c Wiring holding groove 505 Eaves side frame part (Eaves side holding part)
506 Building side frame part (building side holding part)
601 Roof tile member

Claims (10)

A solar cell module having a solar cell panel and a back surface reinforcing member that is integrally attached to the back surface of the solar cell panel.
In the solar cell module installed on the roof in a state where the light receiving surface of the solar cell panel is inclined,
The back surface reinforcing member has a bottomed groove portion and has a bottomed groove portion.
A ventilation flow path through which gas can pass is formed by the back surface of the solar cell panel and the groove portion.
At the time of installation, the ventilation flow path branches from the first flow path extending from the eaves-side end , which is one end, to the ridge-side end, which is the other end, in the inclined direction, and from the middle of the first flow path. Includes a second flow path that extends
The eaves side end of the first flow path communicates with the outside.
The second flow path is characterized in that when the light receiving surface is viewed in a plan view, the second flow path is inclined and extends from the outside toward the ridge side end side and communicates with the middle of the first flow path. Solar cell module. The groove portion is isolated in a peninsula shape or an island shape in the groove portion, and includes a first support portion that supports a part of the back surface of the solar cell panel.
The solar cell module according to claim 1, wherein the first flow path is branched into a plurality of parts by the first support portion. It is formed adjacent to the first flow path and includes a second support portion that supports a part of the back surface of the solar cell panel.
The second support portion forms a branch groove extending in a direction intersecting the extending direction of the first flow path.
The sun according to claim 1 or 2, wherein the second flow path is formed by the back surface of the solar cell panel and the branch groove, and a part of the inner wall is formed by the second support portion. Battery module. The solar cell panel has a horizontally long plate shape and has two sides facing each other in the horizontal direction.
The back surface reinforcing member crosses between two opposite sides of the solar cell panel in the lateral direction, and has a plurality of main body portions and a bridging portion connecting adjacent main body portions.
The ventilation flow path is formed between the back surface of the solar cell panel and each main body.
The ventilation flow path includes a merging flow path that communicates with the outside.
The solar cell module according to any one of claims 1 to 3, wherein the merging flow path is provided on the ridge side end portion side of the bridging portion in the inclined direction. The main body portion has a raised portion that is raised with respect to other portions, and has a raised portion.
The solar cell module according to claim 4, wherein the bridging portion connects raised portions between adjacent main bodies. It has a terminal box and a cable portion extending from the terminal box.
The back surface reinforcing member according to any one of claims 1 to 5, wherein the back surface reinforcing member has a cable holding portion capable of fitting a part or all of the cable portion and holding the cable portion. Solar cell module. Has a terminal box
The solar cell panel has a panel body and a heat sink.
The heat radiating plate constitutes the back surface of the solar cell panel, and constitutes a part of the inner wall of the ventilation flow path.
The heat sink is made of metal or alloy and has through holes.
The heat sink, wherein the through hole is the terminal box through the solar cell module according to claim 1, characterized in that covering the power generation region of at least the panel body. It is attached in the direction of the eaves of the roof together with other solar cell modules or roof tile members located on the eaves side with respect to the roof base, and is arranged at least on the other solar cell modules or the roof tile members with a stepped overlapping portion. It is a solar cell module that is used
It has an eaves side holding portion that holds the eaves side end portion of the solar cell panel, and has an eaves side holding portion.
The tile member is attached with an engaging portion that can be engaged with the holding portion on the eaves side.
When installed on the roof base together with the other solar cell module or the roof tile member, the eaves side engages with a part of another solar cell module adjacent to the eaves side or an engaging portion attached to the roof tile member. The solar cell module according to any one of claims 1 to 7, wherein the movement in the vertical direction is restricted by the other adjacent solar cell module or the engaging portion. The solar cell module according to any one of claims 1 to 8 is provided.
It is a roof structure in which the solar cell module is mounted by using mounting brackets on a foundation roof structure in which a plurality of roof tile members are laid.
The mounting bracket has a first recess and a second recess that opens in the direction opposite to the first recess.
In the mounting bracket, a part of the tile member is inserted into the first recess and fixed to the foundation roof structure, and a part of the solar cell module is inserted into the second recess to insert the solar cell module. A roof structure characterized by holding. It is a back surface reinforcing member that constitutes a part of the solar cell module installed on the roof with the light receiving surface of the solar cell panel tilted.
In the back surface reinforcing member that is integrally attached to the back surface of the solar cell panel
It has a bottomed ventilation groove and
The ventilation groove portion forms a ventilation flow path through which gas can pass together with the back surface of the solar cell panel.
The groove for aeration, at the time of installation of the solar cell module, and the one flow path extending from one end portion serving as eaves side end portion in the inclination direction to the other end serving as ridge-side end portion and the second main channel, the secondary flow path merging into the middle of the first main channel extends branched from the middle of the first two flow path constitutes a including said vent passage,
The ventilation groove portion is formed from the middle of the second main flow path to the ridge side when the light receiving surface is viewed in a plan view from the second main flow path whose eaves side end portion communicates with the outside when the solar cell module is installed. back reinforcing member and having said Ru extending inclined toward the end side auxiliary flow path, said first main channel of the eaves side end portion communicates with the outside, respectively a corresponding portion of.

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