JP3548496B2 - Solar energy module, solar energy system equipped with the solar energy module, and house equipped with the solar energy system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a solar energy module typified by a solar cell module installed on the roof of a residential building, a solar energy system including the solar energy module, and a house including the solar energy system. In particular, the present invention relates to a measure for increasing the output of a solar energy module.
[0002]
[Prior art]
Conventionally, unlike thermal power generation, which burns fossil fuels such as petroleum, and nuclear power generation, which has difficulty in treating waste, solar cell systems that generate electricity using clean solar energy that has minimal impact on the global environment have been developed. Are known. In recent years, this solar cell system has been adopted in general homes as the price has dropped. By providing a private power generation facility using such a solar cell system, power can be obtained during the day without requiring power transmission from a power company. In addition, when surplus power is generated during daytime power generation, the surplus power can be sold to a power company.
[0003]
Generally, this type of solar cell system has a solar cell module in which a solar cell module main body is supported by a frame. In other words, a groove for fitting the outer peripheral portion of the solar cell module main body is provided in the frame body, and the two are integrated by fitting the outer peripheral portion of the solar cell module main body into this groove.
[0004]
When installing this solar cell module on a roof surface, a support bracket is installed on a roof material such as a tile, and a support bar is placed on the support bracket. The solar cell module is mounted on the support bar. Also, when applying to a roof with slate tiles, a support bracket is installed on the slate tile, a support bar is placed on the support bracket, and a solar cell module is mounted on the support bar. I have to.
[0005]
In addition, the revision of the Building Standards Law has made it possible to use solar cell modules as roofing materials. This method is disclosed, for example, in Japanese Patent Application Laid-Open No. 9-96071.
[0006]
This publication discloses an installation structure of a solar cell module generally called a “super straight type”. Hereinafter, the installation structure of this system will be described in detail.
[0007]
FIG. 12 is an exploded perspective view of a solar cell module a employed in this method. The solar cell module a is provided with a solar cell row b formed by connecting a plurality of solar cells b1, b1,... In series or in parallel by an interconnector or the like. This solar cell row b is sandwiched between a white plate reinforced glass d forming a light receiving surface and a steel plate-containing film e forming a back surface via a filler c, c made of a transparent resin, thereby forming a rectangular plate-shaped frameless. Module a1 is manufactured.
[0008]
Then, the peripheral portion of the frameless module a1 is fitted and supported by a module frame f which is an extruded product of aluminum or the like via waterproofing waterproof materials g, g,. f3 and f4 are connected by screws. Of the module frames f1, f2, f3, f4, a rib h is formed in the ridge-side module frame f1, and a screw hole h1 for fixing is formed in the rib h.
[0009]
The height of each of the module frames f1, f2, f3, f4 is, for example, 37 mm. Since the photovoltaic cell row b is located below the white-plate tempered glass d, as shown in FIG. 13, the upper surface of the photovoltaic cell row b has a predetermined dimension (t1 in the figure) larger than the upper end of the module frame f. ) (For example, a position lower by 5 mm).
[0010]
FIG. 14 shows a state in which the solar cell modules a, a,. That is, a wood screw i is inserted into the screw hole h1 of the ridge-side module frame f1 of the solar cell module a located below (eave side) in the flow direction of the roof, and the module frame f1 is attached to the roof surface (field board, etc.). Fixed to. In addition, the eave-side module frame f2 of the solar cell module located on the upper side (ridge side) in the flow direction of the roof is placed on the ridge-side module frame f1 of the solar cell module adjacent to the eaves side. The overlap dimension is, for example, 24 mm.
[0011]
[Problems to be solved by the invention]
By the way, when the solar cell module configured as described above is installed in a stepped state on the roof surface on the south side of a house, it is located at 35 degrees north latitude and 135 degrees east longitude from 8:00 am to 4:00 pm on the summer solstice day. It can be seen from a sunshine relation diagram (not shown) that an area where sunlight is obtained in between is an area where an angle of attack of 80 degrees or less can be obtained when facing true north.
[0012]
When the solar cell modules a, a, ... are tiered on the roof surface (inclination angle of 27 degrees) on the south side of the 5-dimension, the above area is considered as a plane where the solar cell row b exists. Sunlight is obtained from 8:00 am to 4:00 pm in a region of, for example, 28 mm or more from the eaves side end of the solar cell module a adjacent to the side. In order not to be affected by the shadow, it is necessary to arrange the solar cell row b in this area (an area without a shadow) (see a broken line in the figure). That is, the area within 28 mm from the eaves-side end of the solar cell module a on the ridge side is a dead space D.
[0013]
When the solar cell modules a, a,... Are stepped, a predetermined overlapping portion is required between the solar cell modules a adjacent to each other in the flow direction of the roof. Further, in order to increase the size of the solar cell module a, sufficient strength of the module frame is required. For this reason, it is necessary to increase the height of the module frame to some extent.
[0014]
For this reason, even when the solar cell module is installed on the roof surface on the south side of the house, in the morning or evening around the summer solstice, the shadow of the solar cell module located on the upper side (ridge side) in the flow direction of the roof will be affected. In some cases, it may fall on the light receiving surface of the lower (eave side) solar cell module. In this case, the output of the solar cell module may decrease, and a sufficient amount of power generation may not be obtained.
[0015]
Further, in order to prevent the influence of the shadow, it is necessary to provide a relatively large dead space without installing a solar cell on the ridge side of the solar cell module.
[0016]
Such a problem is the same not only when a solar water heater module but also a solar water heater module is laid.
[0017]
The present invention has been made in view of such a point, and it is an object of the present invention that when a solar energy module is stepped, the shadow of the solar energy module located on the upper side in the flow direction of the roof is lower. It is an object of the present invention to provide a configuration capable of suppressing a large dead space from being generated on a light receiving surface of a solar energy module.
[0018]
[Means for Solving the Problems]
-Summary of the invention-
In order to achieve the above-described object, the present invention provides a frame that supports a solar energy module main body, with a portion overlapped with another solar energy module having a short height dimension and being adjacent to the eaves side, on the eaves side edge. It has a function to connect the solar energy modules and to shorten the length of the shadow on the solar energy module on the eaves side.
[0019]
-Solution-
Specifically, the outer edge portion of the solar energy module main body is supported by a frame holding the four sides of the solar energy module main body, and the frame body eaves on another solar energy module adjacent to the roof eave side. It is assumed that the solar energy module is installed on the roof surface with the side edges overlapped. For this solar energy module, the lower end portion of the frame eave side edge extends along the extension direction of another solar energy module adjacent to the eave side, and is superimposed on the ridge side edge of this other solar energy module. An extension is provided. A first horizontal portion extending from the lower end of the eave-side end of the frame main body constituting the frame to the eaves side, and a hanging portion extending downward from the eaves-side end of the first horizontal portion are provided on the extending portion. And a second horizontal portion extending from the lower end of the hanging portion to the ridge side. Further, the following is a specific configuration of the extending portion. That is, as shown in FIG. 10, a straight line L connecting the upper end point A of the extending portion 52 e and the upper eaves side point B of the frame eaves side edge 52 in the cross section of the frame eaves side edge 52, and the frame eaves The angle θ between the side edge 52 and the upper side is set so that the sum of the angle θ and the inclination angle φ of the roof surface is 80 degrees or less.
[0020]
According to this specific matter, when connecting solar energy modules, the extending part of the solar energy module on the ridge side is superimposed on the solar energy module on the eave side. Since the length of the extending portion is set shorter than the height of the entire frame, the shadow of the extending portion is prevented from reaching the light receiving surface of the solar energy module on the eaves side. For this reason, the irradiation of the solar light to the light receiving surface of the solar energy module is performed favorably.
[0022]
In addition, when the solar energy module is installed on the roof surface having a gradient of 5 dimensions, the upper end point A of the extending portion 52e and the upper eaves side point B of the frame eaves side edge 52 in the cross section of the frame eaves side edge 52. Is set to be 53 degrees or less between the straight line L connecting the above and the upper side of the frame eave side edge 52.
[0023]
The reasons for these settings are described below. The area where sunshine is obtained from 8:00 am to 4:00 pm on the summer solstice at 35 degrees north latitude and 135 degrees east longitude is the area where the angle of attack is less than 80 degrees when facing true north. is there. Therefore, by setting the shape of the extending portion 52e as described above, the extending portion 52e does not block the sunlight (the arrow in FIG. 10).
[0025]
Further, as another solution, an outer edge portion of the solar energy module main body is supported by a frame body holding four sides of the solar energy module main body, and on another solar energy module adjacent to the eaves side of the roof. It is assumed that a solar energy module is installed on the roof surface with the frame eave side edges superimposed on each other. For this solar energy module, the lower end portion of the frame eave side edge extends along the extension direction of another solar energy module adjacent to the eave side, and is superimposed on the ridge side edge of this other solar energy module. An extension is provided. Then, a first horizontal portion extending from the lower end of the eave-side end of the frame main body constituting the frame to the eaves side is provided on the extending portion, and the first horizontal portion is downwardly inclined at a predetermined inclination angle from the eaves-side end of the first horizontal portion. And a hanging portion extending downward from the lower end of the inclined portion, and a second horizontal portion extending from the lower end of the hanging portion to the ridge side. Further, the following is a specific configuration of the extending portion. That is, as shown in FIG. 8, the inclination angle θ of the inclined portion 52B with respect to the bottom surface of the extending portion 52e connects the upper end point A of the extending portion 52e and the upper eaves side point B of the frame eave side edge. The angle θ between the straight line L and the bottom surface of the frame is set to be equal to or smaller than the angle θ.
[0026]
According to this specific matter, it is possible to reliably prevent the extending portion 52e from blocking sunlight due to the presence of the inclined portion 52B, and to increase the height of the extending portion 52e to increase its strength. Becomes possible.
[0031]
Further, in a solar energy system constructed by integrally assembling a plurality of the above-described solar energy modules, and in a house provided with this solar energy system on a roof surface, the extension of the solar energy module is shadowed on the eaves side. Is suppressed, and a high output of the solar energy module is obtained.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a case will be described in which a solar cell module is employed as a solar energy module and the solar cell module is directly laid on a roof of a house.
[0033]
FIG. 1 is a partially omitted perspective view showing a roof portion of a house on which a solar cell module 2 according to the present embodiment is laid. As shown in this figure, the roof 1 of the present house is of a gable type, which is a substantially central portion in the housing girder direction of a roof surface 11 on one side (for example, a roof surface facing south), and A plurality of solar cell modules 2, 2, ... are laid from substantially the center in the flow direction to the eaves. On the other hand, a roof tile (not shown) is laid on the other roof surface (for example, a roof surface facing the north side) 12.
[0034]
Are arranged in a matrix in the direction in which the ridge extends and the direction in which the roof 1 is inclined. The solar cell module 2 has sufficient fire resistance (similar fire resistance to roof tiles). Therefore, roof tiles are not laid on portions where the solar cell modules 2, 2, ... are arranged, and the solar cell modules 2, 2, ... themselves are directly laid as roofing materials.
[0035]
-Configuration of solar cell module 2-
Hereinafter, the configuration of the solar cell module 2 will be described. The solar cell module 2 includes a solar cell module main body 4 as a solar energy module main body and a frame 5 as shown in FIG. 2, FIG. 3, and FIG. FIG. 2 is an exploded perspective view of the solar cell module 2. FIG. 3 is a side view of the solar cell module main body 4. 4A is a plan view of the solar cell module 2, FIG. 4B is a view as viewed from the arrow B in FIG. 4A, and FIG. 4C is a view as viewed from the arrow C in FIG.
[0036]
As shown in FIGS. 2 to 4, the solar cell module body 4 is a solar cell formed by connecting a plurality of solar cells 41a, 41a,... Formed of polycrystalline silicon in series or in parallel by an interconnector or the like. The cell array 41 is sandwiched between a white reinforced glass plate 43 forming a light receiving surface and a steel plate-containing film 44 forming a back surface via a filling material 42, 42,. Of the solar cell assembly. A terminal box 45 is attached to the back surface of the solar cell module body 4. An output cable 46 is led out of the terminal box 45. The solar cell 41a may be formed of single crystal silicon, amorphous silicon, or the like.
[0037]
As shown in FIGS. 2, 4 and 5 (an exploded perspective view of a portion V in FIG. 4), the frame 5 holds the four sides of the solar cell module main body 4 and includes a ridge side frame member 51. An eave-side frame member 52 and a pair of left and right flared side frame members 53, 54 are provided. The frame members 51, 52, 53, 54 are integrally formed into a frame shape. FIG. 5 shows an assembly portion between the eaves-side frame member 52 and the right-hand side flank side frame member 54.
[0038]
Each of the frame members 51, 52, 53, 54 is formed by extrusion of aluminum. The ridge-side frame member 51 holds an edge of the solar cell module body 4 located on the house ridge side. The eaves-side frame member 52 holds an edge of the solar cell module body 4 located on the house eaves side. Each of the side frame members 53 and 54 hold the left and right side edges of the solar cell module main body 4 respectively, and connect both end edges of the ridge side frame member 51 and the eave side frame member 52 to each other.
[0039]
Next, the configuration of each of the frame members 51, 52, 53, 54 will be described in detail.
[0040]
First, the cross-sectional shape of the eave-side frame member 52 constituting the frame eave-side edge according to the present invention will be described with reference to FIGS. 5 and 6 (a cross-sectional view taken along the line VI-VI in FIG. 4). In the following description of the cross-sectional shape, it is assumed that the left side in FIGS. 5 and 6 is the outside forming the outer edge of the solar cell module 2, and the right side in each figure is the side supporting the solar cell module body 4, that is, the inside.
[0041]
The eave-side frame member 52 includes a frame main body 52a having a substantially square closed cross section. A fastening seat 52b for screwing the side frame members 53 and 54 is integrally formed inside the frame main body 52a. The eave-side frame member 52 includes a module holding piece 52c that extends vertically upward from the upper end of the outer end of the frame body 52a and is bent inward. A module holding groove 52d that is open inward is formed between the module holding piece 52c and the upper surface of the frame main body 52a. On the other hand, the eave-side frame member 52 has a fixed seat 52e that extends outward from the lower end of the outer end of the frame main body 52a, is bent downward, and is further bent inward (this fixed seat 52e). The details of the shape of 52e will be described later). A fastening seat 52f for screwing the side frame members 53 and 54 is integrally formed inside the fixed seat 52e. As shown in FIG. 4, the fixing seat 52e has a bolt hole 52g for fastening to the ridge-side frame member 51 of another solar cell module 2 adjacent to the eave side or to an eave-point fixing bracket 6 described later. , 52g,... Are formed at a plurality of locations.
[0042]
Although the cross-sectional shape is not shown, the cross-sectional shape of the ridge-side frame member 51 is substantially the same as that of the eave-side frame member 52, and a module for holding the ridge-side edge of the solar cell module body 4 is provided. In addition to having a holding groove, bolt holes 51a, 51a,... For connecting another solar cell module 2 adjacent to the ridge side are formed at a plurality of locations (see FIG. 4).
[0043]
Next, a sectional shape of the side frame member 54 will be described with reference to FIGS. 5 and 7 (a sectional view taken along line VII-VII in FIG. 4). In the following description of the cross-sectional shape, the near side in FIG. 5 and the right side in FIG. 7 are defined as the outside constituting the outer edge of the solar cell module 2, and the far side in FIG. 5 and the left side in FIG. 7 support the solar cell module body 4. It is assumed to be on the side, that is, inside.
[0044]
In this case, the side frame member 54 has a plate-shaped main body 54a extending in the vertical direction. Both ends in the longitudinal direction (the left-right direction in FIG. 5) of the main body 54a substantially match the end shapes of the eave-side frame member 52 and the ridge-side frame member 51. In addition, screw holes 54b, 54b are formed at positions corresponding to the fastening seats 52b, 52f at both end edges. Flanges 54c, 54d, and 54e extending outward in the horizontal direction are formed at the upper end, the lower end, and the intermediate portion between the upper end and the lower end of the outer surface of the main body 54a. On the other hand, flanges 54f and 54g extending in the horizontal direction are also formed at the upper end portion and the intermediate portion on the inner side surface of the main body portion 54a. A module holding groove 54h that is open inward is formed between the flanges 54f and 54g. Incidentally, the other side end frame member 53 also has the same cross-sectional shape.
[0045]
Next, a connection structure between the frame members 51, 52, 53, 54 will be described. Here, the connection structure between the eave-side frame member 52 and the non-eave-side frame member 54 will be described with reference to FIG. As shown in FIG. 5, the one end portion in the longitudinal direction of the side frame member 54 is overlapped with one end surface of the eave side frame member 52. Accordingly, the screw holes 54b, 54b of the side frame member 54 and the fastening seats 52b, 52f of the eave side frame member 52 are aligned. The two frame members 52 and 54 are connected to each other by screwing a screw (not shown) into the two. Similarly, the other end of the side frame member 54 and the side end portion of the ridge side frame member 51, the side end portion of the other side frame member 53 and the ridge side frame member 51 and the eave side frame are similarly provided. Each side end portion of the material 52 is also connected. In this way, the frame members 51, 52, 53, and 54 are connected to each other to form a frame 5 as shown in FIG.
[0046]
The fitting operation of the solar cell module main body 4 into each of the frame members 51, 52, 53, 54 is performed simultaneously with the above-described connection operation of the respective frame members 51, 52, 53, 54. That is, these frame members 51, 52, 53, 54 are connected to each other while fitting the edges of the solar cell module body 4 into the module holding grooves 52d, 54h of the frame members 51, 52, 53, 54. Go. When the solar cell module body 4 is fitted, a water blocking member 55 made of, for example, EPDM rubber is fitted into the module holding grooves 52d and 54h, and the space between the solar cell module body 4 and the module holding grooves 52d and 54h is provided. Keep sealed. Thus, the solar cell module 2 is manufactured. In the solar cell module 2 according to the present embodiment, the white plate tempered glass 43 has a length of 1965 mm and a width of 530 mm. For this reason, in order to obtain sufficient strength, the height of each of the frame members 51 to 54 is set to about 37 mm.
[0047]
-Detailed description of the shape of the fixed seat 52e-
The feature of this embodiment resides in the shape of the fixed seat 52e. Hereinafter, details of the shape of the fixed seat 52e will be described. As shown in FIG. 6 and FIG. 8 (schematic diagram showing a state in which the fixing seat 52e is superimposed on the solar cell module 2 adjacent to the eaves side), the fixing seat 52e extends outward from the lower end of the outer end of the frame body 52a. A first horizontal portion 52A, an inclined portion 52B inclined downward at a predetermined inclination angle from an outer end (left end in the drawing) of the first horizontal portion 52A, and a downward extending from a lower end of the inclined portion 52B. It has a hanging part 52C and a second horizontal part 52D extending inward (right side in the figure) from the lower end of the hanging part 52C. The first horizontal portion 52A and the second horizontal portion 52D are parallel to each other. The hanging portion 52C is orthogonal to each of the horizontal portions 52A and 52D. As shown in FIG. 9, the fixing seat 52e functions as a fastening portion that is superimposed on the upper side of the solar cell module 2 adjacent to the eaves side. Thus, the fixing seat 52e is configured as an extending portion in the present invention. In other words, the fixed seat 52e (extended portion) is formed at the lower end portion of the eaves side frame member 52 and extends along the extension direction (direction toward the eaves) of another solar energy module 2 adjacent to the eaves side. And it is comprised as a part superimposed on the ridge side frame material (ridge side edge) of this other solar energy module 2.
[0048]
Next, the inclination angle of the inclined portion 52B will be described. As shown in FIG. 8, the inclination angle θ of the inclined portion 52B (the inclination angle with respect to the second horizontal portion 52D) is set so that the sum with the inclination angle φ of the roof surface is 80 ° or less. In other words, an area where sunlight is obtained between 8:00 am and 4:00 pm on the summer solstice at a position of 35 degrees north latitude and 135 degrees east longitude has an angle of attack of 80 degrees or less when facing the north. Area. The arrow shown in FIG. 8 indicates the direction of irradiation of sunlight (especially sunrise or sunset) when the angle of attack is 80 °. Therefore, by setting the inclination angle θ of the inclined portion 52B as described above, the fixed seat 52e does not block the sunlight. That is, as shown by the arrow in FIG. 8, the sunlight passing near the upper edge of the eaves-side frame member 52 passes near the inclined portion 52B and reaches the light receiving surface of the solar cell module 2.
[0049]
Specifically, when it is installed on a five-dimensional gradient roof surface (inclination angle 27 degrees), the inclination angle θ of the inclined portion 52B is set to 53 ° or less. In other words, the inclination angle θ of the inclined portion 52B is determined by the upper end point (point A in FIG. 8) of the fixed seat (extended portion) 52e and the upper eave side point of the eave-side frame member (frame eave-side edge) 52. (Point B in FIG. 8) and the angle θ between the straight line L and the bottom surface of the frame 5 are set to be smaller or smaller.
[0050]
As a result, the sum of the inclination angle θ of the inclined portion 52B and the inclination angle φ of the roof surface becomes 80 ° or less, and the fixed seat 52e does not block the sunlight as shown by the arrow in FIG. The shadow of the eaves-side frame member 52 on the light receiving surface of the solar cell module 2 located on the side has only the dimension T (for example, 4 mm) in the figure. Further, the length dimension (dimension in the flow direction of the roof) of the fixed seat 52e is 24 mm, and the height dimension is set to 11.5 mm. This is a dimension necessary for sufficiently obtaining the strength of the fixed seat 52e. The dimensions of each part of the fixed seat 52e are not limited to these.
[0051]
-Explanation of installation procedure of solar cell module 2-
Next, a procedure for mounting the solar cell module 2 configured as described above will be described.
[0052]
As shown in FIG. 9, first, the eaves fixing bracket 6 is fixed to the eaves part of the roof. The eaves fixing bracket 6 has a substantially L-shaped cross section, and a main body 61 on which the fixing seat 52e of the eaves side frame member 52 in the solar cell module 2 is mounted, and a lower end of the main body 61 to the roof surface. And a rib 62 extending along. In the eaves fixing bracket 6, screw holes are respectively formed in the upper surface of the main body 61 and the ribs 62, and the wood screws 63 are inserted into the screw holes formed in the ribs 62, so that the roof surface ( Field board, etc.).
[0053]
After the fixing operation of the eaves fixing bracket 6, the operation proceeds to the operation of installing the solar cell modules 2, 2,. First, the fixing seat 52 e of the eave-side frame member 52 of the solar cell module 2 located closest to the eaves is placed on the main body 61 of the eaves fixing bracket 6. At this time, the screw hole 52g of the eave-side frame member 52 and the screw hole of the main body 61 of the eave-point fixing bracket 6 are aligned, and the screw 56 is screwed from above so that the eave-side edge of the solar cell module 2 is removed. It is fixed to the roof surface via the eaves fixing bracket 6.
[0054]
Next, the fixing seat 52 e of the eave-side frame member 52 in the solar cell module 2 located second from the eaves side is fixed to the ridge-side frame member 51 of the fixed solar cell module 2. That is, the screw hole 52g of the eaves-side frame member 52 is aligned with the screw hole 51a of the ridge-side frame member 51, and a screw (not shown) is screwed in from above, so that the second solar cell module 2 from the eaves side is screwed. Is fixed on the solar cell module 2 located closest to the eaves. Note that the overlap size at this time is set to, for example, 28 mm. This overlapping size is not limited to this.
[0055]
In this way, the solar cell modules 2, 2, ... are laid directly on the roof of the house in order from the eaves side to the ridge side. Thus, a solar cell array, which is an aggregate of a plurality of solar cell modules 2, 2,..., Is completed.
[0056]
Power is generated by irradiating the solar cell system composed of the plurality of solar cell modules 2, 2,... Installed on the roof surface with sunlight.
[0057]
At the time of irradiation with sunlight, as described above, the inclination angle θ of the inclined portion 52B is set so that the sum with the inclination angle φ of the roof surface is 80 ° or less. Will not be blocked. That is, as shown by the arrow in FIG. 8, the sunlight passing near the upper edge of the eaves-side frame member 52 passes near the inclined portion 52 </ b> B and reaches the light receiving surface of the solar cell module 2 to contribute to power generation. Become.
[0058]
-Effects of Embodiment-
As described above, in the present embodiment, the fixing seat 52e as an extending portion is provided on the eaves-side frame member 52, and this is used as an overlapping portion with another solar cell module 2 adjacent to the eaves side. . An inclined portion 52B is formed in the fixed seat 52e to prevent the fixed seat 52e from blocking sunlight. For this reason, the shadow of the solar cell module 2 on the ridge side on the light receiving surface of the solar cell module 2 can be significantly reduced, and all the solar cells 41a, 41a,. Is The phantom line in FIG. 8 indicates a conventional eaves-side frame material. In this case, the shadow on the light receiving surface of the solar cell module 2 located on the eaves side is as large as the dimension T ′ in the figure. Thus, in this embodiment, power generation is effectively performed in all the solar cells 41a, 41a,... Irrespective of the angle of attack of the sun. Therefore, a high output of the entire system can be obtained.
[0059]
-Modification-
Next, two types of modified examples of the present invention will be described.
[0060]
<First Modification>
First, a first modification will be described with reference to FIG. The fixed seat 52e according to the present example does not include an inclined portion. Therefore, a straight line (straight line L in the figure) connecting the upper end point (point A in the figure) of the fixed seat 52e of the eave frame member 52 and the upper eaves side point (point B in the figure) of the fixed seat 52e. The angle θ between one horizontal portion 52A (parallel to the upper side of the eaves side frame member 52) is set so that the sum of the angle θ and the inclination angle φ of the roof surface is 80 degrees or less. Specifically, also in the present example, the solar energy module is installed on a 5-dimensional sloped roof surface, and the angle θ is set to 53 degrees or less.
[0061]
Also in this configuration, it is possible to prevent the fixed seat 52e from blocking the sunlight (see the arrow in FIG. 10). For this reason, the shadow of the solar cell module 2 on the ridge side on the light receiving surface of the solar cell module 2 can be significantly reduced (dimension T in the figure), and sunlight can be effectively emitted from all the solar cells 41a, 41a,. Irradiation generates electric power, and a high output as the whole system can be obtained.
[0062]
In the case of this example, if the height dimension is increased in order to secure the strength of the fixed seat 52e sufficiently, the length of the shadow is correspondingly increased. For this reason, in this example, it is preferable that the height dimension of the fixed seat 52e be kept to the minimum necessary. On the other hand, in the fixed seat 52e having the above-described inclined portion 52B, even if the height dimension of the fixed seat 52e is increased, if the area of the inclined portion 52B is increased accordingly (arrow in FIG. 8). (If the inclined portion 52B is formed along), the length of the shadow can be prevented from becoming long.
[0063]
<Second modification>
Next, a second modification will be described with reference to FIG. The fixed seat 52e according to this example does not include the first horizontal portion 52A and the hanging portion 52C, and the entire eave-side surface is formed by the inclined portion 52B. Also in this case, the inclination angle θ of the inclined portion 52B is set so that the sum with the inclination angle φ of the roof surface is 80 ° or less. Specifically, also in the present example, the solar energy module is installed on a 5-dimensional sloped roof surface, and the angle θ is set to 53 degrees or less. Thereby, as shown by the arrow in FIG. 11, the fixed seat 52e does not block the sunlight.
[0064]
Therefore, also in this configuration, the shadow of the solar cell module 2 on the ridge side on the light receiving surface of the solar cell module 2 can be significantly reduced (the shadow is eliminated in the shape shown in FIG. 11), and all the solar cells The cells 41a, 41a,... Are effectively irradiated with sunlight to generate power, and a high output of the entire system can be obtained.
[0065]
-Other embodiments-
In the above-described embodiment, a case has been described in which the solar cell modules 2, 2,... Are employed as solar energy modules, and the solar cell modules 2, 2,. The present invention is not limited to this, and it is also possible to employ a solar water heater module as the solar energy module.
[0066]
Further, the present invention is not limited to a house having a gable type roof 1, but can be applied to a house having a ridge type roof.
[0067]
In the above embodiment, the shape of the fixed seat 52e is specified so that sunlight can be obtained between 8:00 am and 4:00 pm on the summer solstice day at a position of 35 degrees north latitude and 135 degrees east longitude. . The present invention is not limited to this, and may be applied to an area where the angle of attack of the summer solstice is other than 80 °. In this case, the angle of inclination of the inclined portion 52B and the other angle θ may be changed according to the angle of attack. Will be set.
[0068]
【The invention's effect】
As described above, according to the present invention, the eaves side edge of the frame supporting the solar energy module main body is provided with a portion that is short in height and is overlapped with another solar energy module adjacent to the eaves side. ing. In other words, the lower end portion of the frame eave side edge is provided with an extending portion that extends along the extension direction of another solar energy module adjacent to the eave side and overlaps the ridge side edge of this other solar energy module. ing. For this reason, it is possible to prevent the overlapping portion of the frame body with other solar energy modules from blocking sunlight, and to greatly reduce the shadow on the light receiving surface of the solar energy module on the eaves side, thereby increasing the output of the solar energy module. Can be achieved.
[0069]
In addition, the angle between the straight line connecting the upper end point of the extending portion and the upper eaves side point of the eaves side edge in the cross section of the eaves side edge, and the upper side of the eaves side edge of the frame body, By setting the sum of the angle and the inclination angle of the roof surface to be 80 degrees or less, or setting the angle to 53 degrees or less when installing on a 5-inch sloped roof surface, the above-mentioned shadow can be obtained throughout the year. Are almost never located on the light receiving surface. Therefore, high-output solar energy can be obtained throughout the year.
[0070]
Further, the inclination angle of the inclined portion with respect to the bottom surface of the extending portion is defined as an angle between a straight line connecting the upper end point of the extending portion and the upper eaves side point of the frame eaves side edge, and the bottom surface of the frame. When they are set to be the same or smaller, it is possible to reliably prevent the extending portion from blocking sunlight. In addition, it is possible to increase the height of the extending portion to increase its strength. That is, both improvement in the strength of the extending portion and higher output of the solar energy module can be achieved.
[0072]
In addition, when a solar energy system is constructed by integrally assembling a plurality of the above-described solar energy modules, it is possible to increase the output of the system. Further, when this solar energy system is provided on the roof surface of a house, the system can sufficiently cover the power consumed by the house.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a roof portion of a house on which a solar cell module according to an embodiment is laid.
FIG. 2 is an exploded perspective view of the solar cell module.
FIG. 3 is a side view of a solar cell module main body.
4 (a) is a plan view, FIG. 4 (b) is a view from arrow B in FIG. 4 (a), and FIG. 4 (c) is a view from arrow C in FIG. 4 (a).
FIG. 5 is an exploded perspective view of a portion V in FIG.
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4;
FIG. 7 is a sectional view taken along line VII-VII in FIG.
FIG. 8 is a diagram for explaining an inclination angle of an inclined portion.
FIG. 9 is a diagram for explaining a procedure for mounting a solar cell module.
FIG. 10 is a diagram corresponding to FIG. 8 in a first modified example.
FIG. 11 is a diagram corresponding to FIG. 8 in a second modified example.
FIG. 12 is an exploded perspective view of a conventional solar cell module.
FIG. 13 is a cross-sectional view showing a state where the solar cell module is supported by the module frame.
FIG. 14 is a diagram corresponding to FIG. 9 in a conventional example.
FIG. 15 is a view showing an overlapping portion of a solar cell module in a conventional example.
[Explanation of symbols]
1 roof 2 solar cell module (solar energy module)
4 Solar cell module body (solar energy module body)
5 Frame 52e Fixed seat (extended part)
52B Inclined part (inclined surface)

Claims (5)

An outer edge portion of the solar energy module main body is supported by a frame holding four sides of the solar energy module main body, and a frame eave side edge is overlapped on another solar energy module adjacent to a roof eave side. In the solar energy module installed on the roof surface,
At the lower end portion of the frame eave side edge, there is provided an extension portion extending along the extension direction of another solar energy module adjacent to the eave side and overlapping the ridge side edge of this other solar energy module. Has been
The extending portion includes a first horizontal portion extending from the lower end of the eave-side end of the frame main body portion forming the frame to the eaves side, a hanging portion extending downward from the eaves-side end of the first horizontal portion, A second horizontal portion extending from the lower end of the hanging portion to the ridge side ,
The angle between the straight line connecting the upper end point of the extending portion and the upper eaves point of the eaves side edge in the cross section of the eaves side edge of the frame and the upper side of the eaves side edge of the frame is the angle. The solar energy module is characterized in that the sum of the inclination angle of the roof surface and the roof surface is set to 80 degrees or less . An outer edge portion of the solar energy module main body is supported by a frame holding four sides of the solar energy module main body, and a frame eave side edge is overlapped on another solar energy module adjacent to a roof eave side. In the solar energy module installed on the roof surface,
At the lower end portion of the frame eave side edge, there is provided an extension portion extending along the extension direction of another solar energy module adjacent to the eave side and overlapping the ridge side edge of this other solar energy module. Has been
The extending portion includes a first horizontal portion extending from the lower end of the eave-side end of the frame main body portion forming the frame to the eave-side, and a downward inclination from the eave-side end of the first horizontal portion at a predetermined inclination angle. An inclined portion, a hanging portion extending downward from a lower end of the inclined portion, and a second horizontal portion extending from the lower end of the hanging portion to the ridge side ,
The inclination angle of the inclined portion with respect to the bottom surface of the extending portion,
The sun is set to be equal to or smaller than the angle between a straight line connecting the upper end point of the extending portion and the upper eaves side point of the frame eaves side edge and the bottom surface of the frame. Energy module. The solar energy module according to claim 1 ,
It is installed on the roof with a 5 inch slope,
The angle between the straight line connecting the upper end point of the extending portion and the upper eaves side point of the eaves side edge in the cross section of the eaves side edge and the upper side of the eaves side edge of the frame is 53 degrees or less. A solar energy module characterized by being set. A solar energy system comprising a plurality of solar energy modules according to any one of claims 1 to 3 arranged on a roof surface. A house comprising the solar energy system according to claim 4 on a roof surface.

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