JP2017093112A - Solar cell module and solar power system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar power system having a snow stopper structure never increasing the work volume during construction, and to provide a solar cell module for use in the solar power system.SOLUTION: A solar cell module 5 includes a solar cell panel 7 performing photoelectric conversion of the sun light, and a frame 8 provided on the circumference of the solar cell panel. Out of a set of frames provided on two opposite sides, one frame 8B is thicker than the other frame 8A. In the solar power system where the solar cell module 5 is supported along the inclination of the roof, the solar cell module 5 is arranged in such an orientation that the one frame 8B in the solar cell module 5 is ridge side, and the other frame 8A is eaves side.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a solar cell module and a solar power generation system, and more particularly to a solar cell module and a solar power generation system in consideration of prevention of snow sliding.

  In areas where there is a large amount of snow, a snow guard is provided on the roof eaves to prevent or suppress snow fall so that damage caused by falling snow on the roof does not reach passers-by or objects. Sometimes. Moreover, when the solar cell module is installed on the roof, since snow accumulates and falls on the solar cell module, a snow stopper may be provided on the solar cell module. In recent years, in the Japanese housing market, there has been an increase in the number of ways to attach snow stoppers to solar cell modules.

  At present, it is common to use a snow stop fitting as an optional member and a retrofit structure such as attaching the snow stop fitting directly to the solar cell module or attaching the snow stop fitting to the frame of the solar cell module. For example, Patent Document 1 discloses a structure in which a snow stop member is screwed to a frame of a solar cell module, and snow falling is prevented or suppressed by the snow stop member.

JP 2006-278671 A

  In the case of a structure in which a snow stopper is retrofitted as an optional member, the number of parts and the amount of work during construction increase. That is, there is a problem that the work is increased as compared with the standard construction.

  This invention is made | formed in view of the said subject, The solar power generation system which has a snow stop structure which does not increase the work amount at the time of construction, and the solar cell module used for this solar power generation system, The purpose is to provide.

  In order to solve the above-described problems, a solar cell module of the present invention includes a solar cell panel that photoelectrically converts sunlight, and a frame provided on the periphery of the solar cell panel. When the direction substantially perpendicular to the light receiving surface is the height direction of the solar cell panel, one frame is compared with the other frame among a pair of frames provided on two opposing sides of the solar cell panel. The solar cell panel has a large thickness in the height direction.

  According to said structure, when using in the solar power generation system which supports a some solar cell module along the inclination of a roof, the direction which becomes the ridge side for one frame and the other frame in each solar cell module When the two solar cell modules are adjacent to each other, a step is generated due to a difference in thickness between one frame and the other frame. The effect of the snow stop structure is obtained by this step.

  The solar cell module and the photovoltaic power generation system of the present invention have the effect that a snow stop structure can be obtained without using a snow stop fitting as an optional member, that is, without performing work other than standard construction. Play.

It is a perspective view which shows schematic structure of the solar energy power generation system to which the solar cell module of this invention is applied. It is a perspective view which shows the solar cell module in the solar energy power generation system of FIG. It is sectional drawing which expands and shows the eaves side frame of a solar cell module. It is sectional drawing which expands and shows the frame on the ridge side of a solar cell module. It is a perspective view which expands and decomposes | disassembles and shows the fixing structure of the solar cell module with respect to the horizontal rail in the solar power generation system of FIG. It is a perspective view which shows the horizontal rail of FIG. It is sectional drawing which shows the horizontal rail of FIG. It is sectional drawing which shows the state which fixed the two solar cell modules arrange | positioned on both sides of the horizontal rail to this horizontal rail, and is a figure which shows the case where the frame shown in FIG.3 and FIG.4 is used. It is sectional drawing which expands and shows the frame on the ridge side of a solar cell module. It is sectional drawing which shows the state which fixed the two solar cell modules arrange | positioned on both sides of the horizontal rail to this horizontal rail, and is a figure which shows the case where the frame shown in FIG.3 and FIG.9 is used. (A) is the schematic which shows the state of the shadow by a frame in the solar cell module shown in FIG. 4, (b) is the schematic which shows the state of the shadow by a frame in the solar cell module shown in FIG. 10 is a perspective view showing a modification of the ridge-side frame in Embodiment 2. FIG. (A) is the schematic which shows the state which has arrange | positioned the solar cell module without a gap, (b) is the schematic which shows the state which has arrange | positioned the solar cell module with the clearance gap. (A), (b) is sectional drawing which expands and shows the eaves side frame of a solar cell module. It is sectional drawing which expands and shows the frame on the ridge side of a solar cell module. It is sectional drawing which shows the state which fixed the two solar cell modules arrange | positioned on both sides of the horizontal rail to this horizontal rail, and is a figure which shows the case where the frame shown in FIG. 3 and FIG. 15 is used.

<Embodiment 1>
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a schematic configuration of a photovoltaic power generation system to which a solar cell module of the present invention is applied. In this solar power generation system 1, four vertical beams 3 are spaced apart from each other on a roof 2 and fixed in parallel with each other, and three horizontal beams 4 are spaced apart from each other by a certain interval. The solar cell modules 5 are fixedly arranged parallel to each other, and four solar cell modules 5 are bridged and fixed between the three horizontal rails 4.

  The longitudinal direction of each vertical beam 3 coincides with the water flow direction A of the roof 2, and the longitudinal direction of each horizontal beam 4 coincides with the direction orthogonal to the water flow direction A. The first row, the second row, and the third row of cross beams 4 are arranged from the downstream side to the upstream side in the water flow direction A. Two sheets in the first row are arranged between the first and second cross beams 4. The solar cell modules 5 are spanned and fixed, and the two solar cell modules 5 in the second row are spanned and fixed between the horizontal beams 4 in the second and third rows. The module 5 is inclined along the water flow direction A.

  The vertical rail 3 may be fixed to the roof 2 by any known method or structure. For example, the vertical rail 3 can be fixed by a metal fitting that passes through the roof tile 2 and is connected to a rafter. Further, the horizontal beam 4 can be fixed to the vertical beam 3 by any known method or structure. For example, the vertical beam 3 and the horizontal beam 4 can be connected and fixed with bolts and nuts. Furthermore, the structure for fixing the solar cell module 5 to the horizontal rail 4 will be described in detail later.

  FIG. 2 is a perspective view showing the solar cell module 5. As shown in FIG. 2, the solar cell module 5 includes a solar cell panel 7 that photoelectrically converts sunlight, and a frame 8 that borders and holds the solar cell panel 7. The frame 8 is composed of four frames attached to each of the four sides of the solar cell module. In the solar cell module 5, on two sides facing along the water flow direction A, the frame (one frame) 8A attached to the eaves side and the frame (the other frame) 8B attached to the ridge side have different shapes. ing.

  For example, the solar cell panel 7 sandwiches a solar cell formed by sequentially laminating a transparent electrode film, a photoelectric conversion layer (semiconductor layer), and a back electrode film between two glass plates, and the end of each glass plate is sandwiched between them. It is sealed. The solar cell panel 7 will be described in more detail. A transparent electrode, a photoelectric conversion layer composed of a semiconductor layer, and a back electrode layer are laminated in this order on a glass substrate that is a light-transmitting substrate, and a solar cell is formed. The transparent glass substrate which is a protective plate is bonded to the back electrode layer side, and the space between the glass substrates is sealed. Alternatively, a solar battery cell sandwiched between one glass plate and a protective layer may be sealed.

  FIG. 3 is an enlarged cross-sectional view of the eaves side frame 8A of the solar cell module 5. The frame 8A is made of an aluminum material, and as shown in FIG. 3, a wall 11, a top plate 12 provided at the upper end of the wall 11, and a bottom plate extending from the lower end of the wall 11 to the inside of the frame 8. 13. A shelf 11a is formed on the inner upper portion of the wall 11, and an insertion groove 11b facing the inside of the frame 8 is formed between the shelf 11a and the upper plate 12, and the end of the solar cell panel 7 is formed in the insertion groove 11b. The part is inserted and supported. Between the end portion of the solar cell panel 7 and the insertion groove 11b, an elastic sheet 14 for end face sealing or buffering is interposed, and the end portion of the solar cell panel 7 is sealed by the elastic sheet 14, and the frame 8A. Transmission of the shock to the end of the solar cell panel 7 is mitigated. In addition, a gap SP is formed between the upper surface (light receiving surface) of the solar cell panel 7 and the upper plate 12 of the frame 8 by the intervention of the elastic sheet 14.

  Further, flat ribs 11c are formed below the upper plate 12 and outside the wall portion 11, and further below the ribs 11c are formed L-shaped protruding portions 11d that protrude toward the outside of the frame 8. The outer end portion of the L-shaped protrusion 11d faces upward.

  4 is an enlarged cross-sectional view of the ridge side frame 8B of the solar cell module 5. As shown in FIG. The frame 8B has a structure similar to the frame 8A, but has a different shape from the frame 8A in the following points. That is, the frame 8 </ b> B has a protrusion 15 formed on the upper surface of the upper plate 12. The protruding portion 15 is formed in a cylindrical shape having a rectangular cross section, and in particular, the rear wall 151 formed on the most ridge side is formed at the same position as the tips of the rib 11c and the L-shaped protruding portion 11d. . The ridge-side frame 8B is thicker in the height direction than the eaves-side frame 8A because the protrusion 15 is formed. In addition, the height direction here is a direction substantially orthogonal to the light receiving surface in the solar cell panel 7.

  FIG. 5 is an exploded perspective view showing the structure for fixing the solar cell module 5 to the cross rail 4 in FIG. As shown in FIG. 5, the fixing bracket 16 for supporting the frame 8 of the solar cell module 5 is fixed to the horizontal rail 4 by the plate nut 20 and the bolt 21.

  The fixture 16 includes a bottom plate 16a, side walls 16b formed by vertically bending both sides of the bottom plate 16a, and a standing plate 16c formed by vertically bending one side of the bottom plate 16a.

  A hole 16d is formed in the bottom plate 16a. The length of the depth of the bottom plate 16 a is slightly shorter than the width of the rail portion 4 b of the horizontal rail 4, and the bottom plate 16 a is disposed inside the rail portion 4 b of the horizontal rail 4.

  Respective receiving portions 16e bent outward are formed at the upper ends of the side walls 16b. The height of each receiving portion 16e is the same as or slightly lower than the first and second pedestal portions 4e and 4g of the horizontal rail 4 when the bottom plate 16a of the fixing bracket 16 is placed on the rail portion 4b of the horizontal rail 4. It is set to be.

  At the upper end of the standing plate 16c, a flange portion 16f bent toward the bottom plate 16a and an engaging portion 16g bent toward the opposite side of the flange portion 16f are formed. Two flanges 16f are provided on both sides of the upper end of the upright plate 16c, and one engaging portion 16g is provided at the center of the upper end of the upright plate 16c, and the two hooks 16f and one engaging portion 16g are alternately arranged. Is arranged. Each contact plate 16h is provided by being bent on both sides of the standing plate 16c.

  6 and 7 are a perspective view and a cross-sectional view showing the horizontal rail 4. This horizontal beam 4 is obtained by cutting and bending a single steel plate and plating it, and as shown in FIGS. 6 and 7, a boundary wall 4a formed by folding the steel plate at the center and stacking two sheets is provided. Have. A rail portion 4b having a U-shaped cross section is formed on one side of the boundary wall 4a, and a long hole 4f is formed at the bottom of the rail portion 4b. The rail portion 4b has a width slightly wider than the depth of the fixing bracket 16, and the fixing bracket 16 can be disposed inside the rail portion 4b. The side wall 4c of the rail portion 4b is bent outward at a right angle, and the upper surface of the bent portion is a first pedestal portion 4e on which the frame 8 of the solar cell module 5 is placed.

  A second pedestal portion 4g on which the frame 8 of the solar cell module 5 is placed is formed on the other side of the boundary wall 4a of the horizontal rail 4. The 2nd base part 4g is formed in step shape, and is set to the same height as the 1st base part 4e. The boundary wall 4a stands perpendicular to the upper surfaces of the first and second pedestals 4e and 4g.

  FIG. 8 is a cross-sectional view showing a structure in which two solar cell modules 5 arranged with the horizontal rail 4 interposed therebetween are fixed to the horizontal rail 4 using the fixing bracket 16.

  As shown in FIG. 5 and FIG. 8, the fixing bracket 16 has its bottom plate 16 a placed on the inner bottom surface of the rail portion 4 b of the horizontal beam 4, and its standing plate 16 c placed close to the boundary wall 4 a of the horizontal beam 4. Yes. The plate nut 20 has its main plate 20a brought into contact with the outer bottom surface of the rail portion 4b of the horizontal beam 4, and the outside of the rail portion 4b of the horizontal beam 4 is sandwiched between the protruding pieces 20b and 20c. . The bolt 21 is screwed into the screw hole 20 d of the plate nut 20 through the washer 22, the perforation 16 d of the fixing bracket 16, and the long hole 4 f of the horizontal rail 4, whereby the fixing bracket 16 is attached to the horizontal rail 4. It is fixed to the rail portion 4b.

  The ridge-side frame 8B of the solar cell module 5 is placed on the first pedestal portion 4e of the horizontal rail 4 and is in contact with each contact plate 16h of the fixing bracket 16, and the L-shaped protrusion 11d of the frame 8B. The outer end of the frame 8B is pushed below the flanges 16f of the fixing bracket 16, and the L-shaped projections 11d of the frame 8B are hooked and locked to the flanges 16f of the fixing bracket 16.

  Further, the eaves side frame 8A of the solar cell module 5 is placed on the second pedestal portion 4g of the horizontal beam 4 and is in contact with the boundary wall 4a of the horizontal beam 4, and the L-shaped protrusion 11d of the frame 8A. The outer end of the frame 8A is pushed into the lower side of the engaging portion 16g of the fixing bracket 16, and the L-shaped protruding portion 11d of the frame 8A is hooked and engaged with the engaging portion 16g of the fixing bracket 16.

  Therefore, the frame 8B of one solar cell module is placed on the first pedestal portion 4e of the horizontal rail 4, the frame 8B is locked to each flange portion 16f of the fixing bracket 16, and the second pedestal portion 4g of the horizontal rail 4 is secured. The frame 8A of the other solar cell module is placed on the frame 8A, the frame 8A is locked to the engaging portion 16g of the fixing bracket 16, and the frames 8A and 8B of the solar cell modules are fixed with the horizontal rail 4 interposed therebetween. .

  In FIG. 1, a plurality of fixing brackets 16 (not shown) are disposed and fixed to each horizontal rail 4, and two frames 8 </ b> A and 8 </ b> B of the solar cell module 5 are fixed to each solar cell module 5. It is fixedly supported by a metal fitting 16.

  As described above, the ridge-side frame 8B is thicker in the height direction than the eaves-side frame 8A because the protrusion 15 is formed. In the support structure shown in FIG. 8, the first pedestal portion 4e and the second pedestal portion 4g are set to the same height. For this reason, a step corresponding to the height of the protruding portion 15 in the frame 8B occurs at the boundary between the frames 8A and 8B of each solar cell module fixed with the horizontal rail 4 interposed therebetween.

  In the photovoltaic power generation system 1 according to the present embodiment, the step generated by the protruding portion 15 of the frame 8B has the function of a snow stop structure. That is, in the solar power generation system 1, a snow stop structure is obtained only by standard construction in which the solar cell module 5 is attached to the mount made of the vertical cross 3 and the horizontal cross 4 without using the snow stop fittings and the like as optional members. I can do it. Moreover, the said level | step difference arises not in a part of solar cell module 5, but the whole length direction of the frame 8B. For this reason, the mechanism which snow-stops uniformly with respect to the water flow direction A of the roof 2 can be provided.

<Embodiment 2>
In the first embodiment, in the frame 8B shown in FIG. 4, the protruding portion 15 is formed in a cylindrical shape having a rectangular cross section, and this structure is suitable for giving the snow stop structure a large strength in the protruding portion 15. . However, the present invention is not limited to this. The ridge-side frame may be a frame 8C shown in FIG. 9, for example, instead of the frame 8B shown in FIG.

  In the frame 8 </ b> C shown in FIG. 9, a protrusion 15 </ b> A is formed on the upper surface of the upper plate 12. The protruding portion 15A is formed in a plate shape that protrudes upward from the rear end of the upper plate 12, and is formed at the same position as the tips of the rib 11c and the L-shaped protruding portion 11d.

  When the solar power generation system 1 is configured using the solar cell module 5 in which the eaves-side frame is the frame 8A and the ridge-side frame is the frame 8C, the protruding portion 15A of the frame 8C becomes a step as shown in FIG. And has a snow stop structure. In the frame 8C, since the protruding portion 15A is plate-shaped, it is suitable for reducing the weight of the solar cell module 5 compared to the frame 8B having the cylindrical protruding portion 15.

  Further, as shown in FIGS. 11 (a) and 11 (b), the protrusion 15A of the frame 8C has a smaller width along the water flow direction A than the protrusion 15 of the frame 8B, so the solar altitude is low. Even if it becomes, there is an advantage that the shadow of the frame is not easily applied to the solar battery cell.

  Further, in the frame 8C, it is not necessary to form the protruding portion 15A in the entire length direction of the frame 8C, and as shown in FIG. 12, a cutout is provided in part and the protruding portion 15A is arranged in the length direction of the frame 8C. It may be formed intermittently. In this case, further weight reduction can be achieved in the solar cell module 5.

  Further, when the solar cell modules 5 arranged along the water flow direction A are arranged without a gap as shown in FIG. 13A, rainwater or the like flowing on the surface of the solar cell module 5 is stepped on the protrusion 15. And the dirt is easily accumulated between the modules. For this reason, it is preferable to arrange | position the solar cell modules 5 arranged along the water flow direction A, providing a clearance gap as shown in FIG.13 (b). In this way, by leaving a gap between the solar cell modules 5, the dirt on the module surface is washed away by rain and then flows down from the gap between the modules, thus preventing dirt from accumulating between the modules. Can do.

<Embodiment 3>
Furthermore, in the present invention, instead of the frame 8A shown in FIG. 3, for example, a frame 8D or a frame 8E shown in FIGS. 14 (a) and 14 (b) may be used as the eaves side frame. The frame 8D and the frame 8E are configured to further prevent dirt from collecting on the surface of the solar cell panel 7 in the solar cell module 5.

  A frame 8D shown in FIG. 14A has a structure in which the light receiving surface of the solar cell panel 7 is not covered, and the step between the upper glass and the frame of the solar cell panel 7 is eliminated. Further, the frame 8E shown in FIG. 14B has a structure in which the upper surface glass of the solar cell panel 7 and the frame are brought into contact with each other to make the step smaller. In these structures, by making the step between the upper glass and the frame of the solar cell panel 7 smaller, water easily flows on the surface of the solar cell panel 7, and dirt is less likely to accumulate on the surface of the solar cell panel 7.

<Embodiment 4>
In the first to third embodiments, in the frame 8B and the frame 8C shown in FIGS. 4 and 9, the protrusions 15 and 15A for increasing the thickness of the frame are formed on the upper surface side of the upper plate 12. However, the present invention is not limited to this, and a protruding portion 15B for increasing the thickness of the frame may be formed on the lower surface side of the bottom plate 13 as in a frame 8F shown in FIG. When the solar power generation system 1 is configured using the solar cell module 5 in which the eaves side frame is the frame 8A and the ridge side frame is the frame 8F, the protruding portion 15B of the frame 8F is a solar cell module as shown in FIG. Since the ridge side end of 5 is lifted to generate a step, the action of the snow stop structure can be obtained also by this.

  As described above, the solar cell module of the present invention includes a solar cell panel that photoelectrically converts sunlight, and a frame that is provided at the periphery of the solar cell panel, and the two opposing sides of the solar cell panel. Of the pair of frames provided on the side, one frame has a greater thickness in the height direction of the solar cell panel than the other frame.

  According to said structure, when using in the solar power generation system which supports a some solar cell module along the inclination of a roof, the direction which becomes the ridge side for one frame and the other frame in each solar cell module When the two solar cell modules are adjacent to each other, a step is generated due to a difference in thickness between one frame and the other frame. The effect of the snow stop structure is obtained by this step.

  Moreover, the said solar cell module can be set as the structure by which the protrusion part was provided in said one frame.

  Moreover, the said solar cell module can be set as the structure by which the said protrusion part is provided over the whole longitudinal direction of said one frame.

  According to said structure, the snow stop action by a level | step difference can be obtained uniformly with respect to the water flow direction of a roof.

  Furthermore, the solar power generation system of the present invention is a solar power generation system including a solar cell module supported along a slope of the roof, and the solar cell module is the solar cell module described above, It is characterized in that one frame is arranged in a direction on the ridge side and the other frame is on the eave side.

  Further, in the solar power generation system, a plurality of solar cell modules are arranged along the inclination direction of the roof, and a gap is provided between the solar cell modules arranged along the inclination direction. It can be configured.

  According to said structure, by making a clearance gap between solar cell modules, after the stain | pollution | contamination of a module surface is washed away with rain etc., it flows down from the clearance gap between modules.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation system 2 Roof 3 Vertical beam 4 Horizontal beam 5 Solar cell module 7 Solar cell panel 8 Frame 8A, 8D, 8E Frame (the other frame)
8B, 8C frame (one frame)
15, 15A, 15B Protrusion

Claims (5)

A solar cell module comprising a solar cell panel for photoelectric conversion of sunlight, and a frame provided at the periphery of the solar cell panel,
When the direction substantially orthogonal to the light receiving surface in the solar cell panel is the height direction of the solar cell panel,
Of the set of frames provided on two opposing sides of the solar cell panel, one of the frames has a greater thickness in the height direction of the solar cell panel than the other frame. . The solar cell module according to claim 1,
The solar cell module, wherein the one frame is provided with a protruding portion. The solar cell module according to claim 2, wherein
The projecting portion is provided over the entire longitudinal direction of the one frame. A photovoltaic power generation system comprising a solar cell module supported along a slope of a roof,
The solar cell module is a solar cell module according to any one of claims 1 to 3, wherein the one frame is arranged in a direction on the ridge side and the other frame is on the eave side. A solar power generation system characterized by The solar power generation system according to claim 4,
A plurality of solar cell modules are arranged along the inclination direction of the roof,
A solar power generation system, wherein a gap is provided between solar cell modules arranged along the tilt direction.

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