JP2002371677A - Solar power array system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a waterproof vertical joint structure of a photovoltaic module that secures a long-lasting mounting structure reliability and waterproofness for decades in a roof building material integrated photovoltaic array. A photovoltaic array comprising a plurality of roof building material-integrated photovoltaic modules laid on the top of a sloped base plate of a roof of a building or on a pier, and a frame on the roof flow direction side of the photovoltaic modules. A rainwater intrusion prevention projection is provided on the upper surface of the roof, a gutter fixed on the top of the base plate or the pier below the vertical seam between the adjacent PV modules, and a cover that covers the vertical seam is provided. ,
By connecting the mounting tabs and gutters of each module frame with bolts and fixing the photovoltaic module to the sloped roof base plate, a roof construction material with high strength reliability and waterproofness with a simple configuration A physical photovoltaic array system becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic module mounting structure integrated with a roof building material of a house.

[0002]

2. Description of the Related Art In Japan, photovoltaic power generation has begun to be spread by residential systems as a leader, but when mounting a photovoltaic array comprising a plurality of photovoltaic modules on a rooftop of a house, There are a form in which a tower is mounted on a normal roof tile and a form in which a roof building material is integrated with a solar power generation module. The latter is notable for technological innovation, partly due to the revision of the Building Standards Law.In addition to the improvement of the original power generation function, it has improved fire resistance as a building material, improved installation workability, and waterproofed against rainwater for decades. The issue is how to secure the quality. In particular, waterproofness as a photovoltaic array is an unprecedented subject, and many trials have been made on a waterproof structure between the photovoltaic modules constituting the photovoltaic array.

In a conventional photovoltaic power generation array system, a vertical seam between photovoltaic power generation modules in a roof flow direction of a house or the like is described in, for example, JP-A-10-15.
As shown in 9284, a C-shaped base that is open upward is fixed to the roof of the roof of the house, and the frame of the photovoltaic module on both sides of the vertical seam is sandwiched between the cover material and the cover fixing bolt. Some are fixed to.

In Japanese Unexamined Patent Application Publication No. 10-176403, a pier is interposed on a field board, but is similarly fixed by a sandwiching method.

On the other hand, JP-A-11-13224 and JP-A-1
In 1-159071, a sufficient gutter is provided preventively for a slight infiltration of rainwater, but on the other hand, the number of parts increases, the structure becomes complicated, and the possibility of high cost is unavoidable.

[0006]

In the structure of the above-described pinching and fixing method, although measures are taken for rainwater, there is a problem that it is inevitable that rainwater enters through a narrow gap of the pinching. Was. As a building material, photovoltaic modules must have at least 30 years of solar life, and such rainwater intrusion can lead to degradation of wooden roof structural materials and electrical wiring systems over a long period of time.

On the other hand, in the case where a sufficient gutter is provided preventively for a small amount of rainwater infiltration, the number of parts increases, the structure becomes complicated, and the possibility of high cost is unavoidable.

The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a roof building material integrated photovoltaic power generation system having a waterproof property that is economical and highly reliable.

[0009]

SUMMARY OF THE INVENTION In a photovoltaic power generation array comprising a plurality of roof building material integrated photovoltaic power generation modules used for a roof of a building according to the present invention, a projection is provided along a roof flow direction. A plurality of roof building material-integrated solar power generation module bodies each having a frame composed of a side frame and an upper and lower frame and having fixing tabs integrally attached to the frame at the side of the frame; A gutter fixed on a top plate or a pier below the vertical joint between the side frames between the power generation module bodies, and the side frame adjacent to the vertical joint between the solar power generation modules. It is characterized in that it comprises a rainproof cover that is to be included and covered, and a connecting member that connects the fixing tab of the frame and the gutter.

[0010] The above-mentioned roof building material-integrated photovoltaic array is characterized in that a spacer is inserted between the base plate and the gutter so as to create a space in which air flows between the photovoltaic module and the base plate. .

The photovoltaic power generation array used for the roof of a building according to the present invention may be used for fixing the upper surface of a base plate or a pier to the photovoltaic power generation module by using a frame on the roof eaves front side and the ridge side of the photovoltaic power generation module. It is characterized by performing in.

Further, the photovoltaic power generation array used for the roof of the building according to the present invention is characterized in that the fixing portion of the gutter fixed to the upper surface of the base plate or the pier is higher than the bottom of the groove portion of the gutter.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A photovoltaic module 1 in a photovoltaic array of the present invention comprises a photovoltaic module light receiving surface 2, a photovoltaic module frame 3, a junction box, and a cable harness. The photovoltaic module light receiving surface 2 is formed by laminating a reinforced glass plate on the front side of a photovoltaic cell via a filler such as EVA (ethyl vinyl acetate) made of transparent resin in a thin flat shape.

FIG. 1 is a view showing one embodiment of the present invention, and FIGS. 2 and 3 are views showing another embodiment. Although omitted in the figure, at least a part of the lower frame extending in the direction of the roof eaves of the photovoltaic module arranged above the roof of the house or the like in the photovoltaic array has at least a part of the flow in the solar direction. The photovoltaic module is covered over the entire length of the horizontal seam of the photovoltaic module so as to cover the upper frame extending toward the roof eaves of the photovoltaic module disposed below, and measures are taken to prevent rainwater from entering.

FIG. 1 shows a first embodiment of the present invention. It is a cross section of the vertical joint between the photovoltaic modules along the roof flow direction when the photovoltaic array is installed on the roof of a house or the like composed of the baseboard 11, the waterproof paper 12, and the rafter 13.

The photovoltaic modules 1 are about 5 to 5
With a 10 mm gap, waterproof paper 12
Is fixed by screwing a fixing bolt 9 that passes through a fixing tab 10 integrally attached to the photovoltaic power generation module 1 on a fixing portion 5 of a gutter installed via the.

On the upper surface of the side edge portion of the frame 3 of the photovoltaic module 1, a convex portion 4 for preventing rainwater infiltration is provided over substantially the entire length in the roof flow direction of the outer frame 3 in a weir-like manner. 3 and is provided integrally or assembling. Convex part 4 for rainwater intrusion prevention
May be provided in one row, but it is preferable to provide two or three rows. When a plurality of rows of the convex portions 4 are provided, a few mm
It is preferable to provide an appropriate distance between the two.

On the side surface of the frame 3 of the photovoltaic power generation module 1, mounting and fixing tabs 10 extend over the entire length of the outer frame 3,
Alternatively, they are dispersedly provided at arbitrary places. In the figure, the mounting and fixing tabs 10 of the adjacent photovoltaic modules 1 are arranged vertically and fixed to the gutter 5 so as to penetrate them with fixing bolts 9. The fixing tabs 10 may be shifted from each other and fixed with the fixing bolts 9.

The gutter is composed of a fixed portion 5 and a groove 6, and the groove 6 has a concave cross-sectional shape and has an end bent upward. The fixing portion 5 has a large thickness because it has a threaded hole for bolt connection for fixing the photovoltaic module 1. Further, since the gutter is structurally independent of the photovoltaic module 1 and the gutter can be elongated regardless of the dimensions of the photovoltaic module 1, the roof flow length is as long as possible in manufacturing and transportation. A single member having no joints is provided over each vertical joint between the photovoltaic modules 1. The fixing portion 5 of the gutter to be fixed on the upper surface of the base plate 11 or the rafter 13 has a shape that is raised above the lower surface of the rainwater flow in the groove portion 6 of the gutter, and bolts or bolts are attached to the base plate 11 or the rafter 13 at a location where rainwater does not reach. Although fixed with nails 8, the bolts or the heads of the nails 8 are waterproofed with a sealant or the like so that moisture is prevented from reaching the base plate 11 gutter or rafter 13. In this case, depending on the design, a protrusion may be provided on the outer surface of the groove 6 of the gutter and bolted or nailed.

A rainproof cover 7 is provided on the upper surface of the gap between the photovoltaic modules 1 to prevent rainwater and dust from being blown. The cover 7 has a dish-shaped cross section, and has a connecting bolt through-hole at an arbitrary position at the center of the cross section or substantially at the center of the cross section. A structure in which the rainproof cover 7 is in close contact with the rainwater intrusion prevention protrusion 4 and the module body so as to cover the frame side edges 3 of both sides facing the vertical joint between the solar power modules 1. The photovoltaic power generation module 1 is sandwiched between the rainproof cover 7 and the gutter fixing portion 5 and is fixed by connecting bolts.

As described above, since the photovoltaic power generation module 1 is mounted directly by the mounting fixing tab 10 provided on the side surface of the roof flow direction frame 3 and the fixing bolt 9 of the gutter 5, it is frequently used in the prior art. In addition to being able to stably fix as compared with the fixing by the sandwiching method, the number of components is small, so that the working time can be significantly reduced and the workability can be improved. Regarding waterproofness as a roof building material, the rainproof cover 7 suppresses the direct intrusion of rainwater, and the rainwater intrusion prevention projection 4 suppresses the infiltration of rainwater from the surface of the photovoltaic module 1. The second and third rainwater intrusion prevention projections 4 prevent it.

Further, since the rainwater intrusion preventing projections 4 are spaced from each other, the rainwater does not enter into the interior due to the capillary phenomenon, and the rainwater does not blow into the interior due to the effect of the labyrinth packing even in a storm. .

Further, if unexpected rainwater still enters, the rainwater is supplied to the side frame 3 of the photovoltaic module 1.
After being gathered in the groove 6 of the gutter along the side of the roof, it flows down the space along the slope of the roof. The rainwater that has flowed down to the groove 6 of the gutter reaches the lower end of the roof and is discharged out of the gutter and is treated by a normal rain gutter or the like. Therefore, infiltration of rainwater is prevented for a long time, and the roof structure is kept healthy.

FIG. 2 shows a second embodiment of the present invention. The difference from the first embodiment is that a pier or spacer 14 is interposed between a waterproof paper 12 and a gutter, and A space allowing air convection has been expanded below the module 1.

In the above example, the mounting and fixing tabs 10 are provided on the side frames 3 of the photovoltaic module 1 along the roof flow direction. However, in another embodiment of the present invention shown in FIG. Attachment fixing tabs 10 'are provided on the roof eaves side and ridge side frames perpendicular to the direction, and are fixed to a photovoltaic module fixing material (not shown).

The mounting and fixing tab 10 'is provided on the frame of the photovoltaic power generation module 1 as in the embodiment of FIG. 1 or FIG.
The bolts are tightened between the base plate 11 and the photovoltaic module fixing member fixed to the rafter 13.

On the other hand, at the vertical joint between the photovoltaic modules 1 along the roof flow direction, only the waterproofing measures are performed by the cover 7, the rainwater intrusion preventing projection 4, and the gutter.

[0028]

As described above, according to the present invention, in the solar array integrated with a roof building material, the photovoltaic power generation module is directly bolted to the photovoltaic module using the fixing tab instead of sandwiching the restraining member. Therefore, the reliability in terms of strength is increased, the configuration is simple and the installation is easy, and the cost is reduced because the number of components is small. Regarding waterproofness as a roof building material, rainwater is firstly waterproofed by the rainproof cover 7, secondarily waterproofed by the rainwater intrusion preventing projection 4,
And the tertiary waterproofing against unexpected rainwater intrusion by the gutter is given, and since the rainwater intrusion prevention convex portions 4 are installed with a gap between each other, rainwater does not enter inside due to capillary phenomenon, Rainwater does not blow inside due to the effect of the labyrinth packing even during a storm. Therefore, infiltration of rainwater is prevented for a long time, and the roof structure is kept healthy.

In another embodiment of the present invention, a space allowing air convection is provided below the photovoltaic module 1 to cool the photoreceptor surface 2 of the photovoltaic module, thereby deteriorating the power generation capacity due to temperature rise. To try to mitigate.

[Brief description of the drawings]

FIG. 1 is a structural diagram showing an embodiment of the present invention.

FIG. 2 is a structural diagram showing another embodiment of the present invention.

FIG. 3 is a structural diagram showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation module 2 Photovoltaic power generation module light receiving surface 3 Photovoltaic power generation module frame 4 Photovoltaic power generation module Rainwater intrusion prevention convex part 5, 5 'gutter fixing part 6 Gutter groove 7 Rainproof cover 8 Fixed nail or Fixing bolt 9 Fixing bolt 10, 10 'Mounting / fixing tab 11 Field board 12 Waterproof paper 13 Rafter 14 Spacer 15 Fixing piece

Claims (4)

[Claims] 1. A solar power generation array comprising a plurality of roof building material-integrated photovoltaic power generation modules used for a roof of a building, and a side frame and a top and bottom frame provided with a projection along a roof flow direction. A plurality of roof building material-integrated photovoltaic module main bodies, each having a frame made of and having fixing tabs attached integrally to the frame on the side of the frame, between the adjacent photovoltaic module main bodies. The gutter fixed to the upper surface of the base plate or the pier below the vertical seam between the side frames, and the vertical seam between the photovoltaic modules including the adjacent side frames are covered. A roof building material-integrated photovoltaic array system comprising a rainproof cover, and a connecting member for connecting the fixing tab of the frame body and the gutter. 2. The roof building material-integrated photovoltaic array according to claim 1, wherein a spacer is inserted between the base plate and the gutter so as to create a space in which air flows between the photovoltaic module and the base plate. A unique solar array system with roof building materials. 3. The photovoltaic array integrated with a roof building material according to claim 1, wherein the upper surface of the base plate or the pier and the photovoltaic module are fixed by the frame on the roof eaves front side and the ridge side of the photovoltaic module. A solar array system integrated with roof building materials. 4. The roof building material-integrated photovoltaic array according to claim 1, wherein the fixing portion of the gutter fixed to the top surface of the baseboard or the pier is higher than the bottom of the groove portion of the gutter. Solar array system.