JP2004260016A - Solar power generator - Google Patents

Abstract

An object of the present invention is to provide a photovoltaic power generator having a grounding structure in which installation work on a roof is easy without increasing the number of parts, the number of work steps is small, and the construction work is simple.
A photovoltaic power generation device comprising a solar cell module in which a metal frame is mounted on a peripheral portion of a solar cell main body and placed on a conductor of a grounded support member so that the metal frame is in contact with the solar cell module. The surface of the metal frame that contacts the support member is formed in a step shape, and at least the surface of the metal frame excluding the surface that contacts the support member is covered with an insulating coating. It is characterized by.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photovoltaic power generation device in which a solar cell module having a metal frame mounted on a peripheral portion of a solar cell body is placed in a state where the metal frame is in contact with a conductor of a grounded support member.
[0002]
[Prior art]
In recent years, with increasing interest in global environmental issues, a solar power generation device has been attracting attention as one of new energy technologies using natural energy, and its use in houses has been accelerated.
[0003]
The photovoltaic power generator reduces the electric load at home by converting solar energy into electric power by using a solar cell which is a main component thereof and using it. In a house, a solar cell module is often used by arranging it on the roof of a house. Therefore, various mounting structures of the solar cell module on the roof have been proposed. For example, the structure as shown in FIG. 9 is one of the attachment methods widely used conventionally. That is, a horizontal rail (horizontal rack) 101 is installed on a vertical rail (vertical rack) 100 fixed on a roof, and a solar cell module 102 with a frame is attached to the horizontal rail 101 by bolts or the like. is there.
[0004]
Also, in the above-described structure, holes or the like for fixing must be provided on the solar cell module side, and it is difficult to reduce the size of the frame of the solar cell module or to fix the solar cell modules individually by fixing bolts or the like. There is a problem that there are many places and the number of man-hours is large, so two adjacent solar cell modules are passed across and mounted on horizontal rails (horizontal racks) arranged at equal intervals in the direction orthogonal to the inclination direction of the roof, A method of fixing to a horizontal rail with one pressing member is also used.
[0005]
In this case, there is an advantage that the size of the solar cell module can be reduced and the number of mounting steps can be reduced, but usually, both the gantry and the solar cell module need to be grounded, and the metal vertical In the above-described method that does not use a crosspiece, in order to ground the gantry and the solar cell module, it is necessary to establish electrical conduction between the crosspieces by some method.
[0006]
Therefore, a method has been proposed in which a conductive member is provided for grounding the frame of the solar cell panel, and a film breaking means is provided to break the insulating film formed on the surface of the frame in order to obtain electrical contact with the conductive member. (For example, see Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-286438
[Problems to be solved by the invention]
However, in the technique disclosed in Patent Literature 1, a new component for grounding must be provided, and the number of components is increased. In addition, an operation for attaching the member is required, and the number of steps is increased. In particular, attaching small members on the roof is very complicated and requires a long construction time. In addition, it may cause an accident such as slipping of parts or tools.
[0009]
In view of the above, the present invention provides a photovoltaic power generation device having a grounded structure in which the installation work on the roof is easy, the number of work steps is small, and the construction work is simple without increasing the number of parts. The purpose is to:
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a photovoltaic power generation device according to the present invention provides a photovoltaic module in which a metal frame is mounted on a peripheral portion of a solar cell main body, in a state where the metal frame abuts on a conductor of a grounded support member. A photovoltaic power generation device mounted on the metal frame, wherein a surface of the metal frame that contacts the support member is formed in a stepped shape, and at least a surface of the metal frame that contacts the support member. Characterized by being covered with an insulating coating.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of a solar power generation device according to the present invention will be described in detail with reference to the drawings schematically illustrating the embodiment.
[0012]
As shown in FIG. 1 (a), the solar cell module 13 has a short side frame 1 made of a metal frame whose surface is covered with an insulating coating except for a part at the periphery of a solar cell body having a flat rectangular shape. The short side frame 1 is provided with a protruding portion 1a on its lower surface, and a portion mounted on a horizontal rack, which is a grounded support member, is cut to form an insulating material. The contact portion 1b is obtained by peeling the surface-treated portion of the coating. That is, the metal frame is placed on the conductor of the horizontal rack in contact with the metal frame. The surface on which the metal frame is mounted is formed in a stepped shape, and as described later, the support member of the metal frame is provided. The surface of the metal frame is formed in a stepped shape, and at least the surface of the metal frame except for the surface of the metal frame that is in contact with the support member is covered with an insulating coating.
[0013]
FIG. 1B shows a state in which the projecting portion 1a and the contact portion 1b are viewed from the back surface of the solar cell module. The long side frame 9 has a thickness smaller than that of the short side frame 1 by the absence of the protruding portion 1a. When the protruding portion 1a of the short side frame 1 is further shaved to form the contact portion 1b. Are projected at least higher than the long side frame 9.
[0014]
As shown in FIG. 6, the solar cell module 13 is provided with a light-transmitting substrate 14 such as glass or resin on a light-receiving surface, and a resin or the like in which a large number of solar cell elements 15 are accommodated. The back surface material is adhered by a sealing material made of, for example, a single crystal, polycrystal, or amorphous material such as a silicon semiconductor or a compound semiconductor made of gallium arsenide is used as the solar cell element 15. And are electrically connected to each other in series and / or in parallel, and the output is taken out to the outside. In addition, a short side frame 1 and a long side frame 9 are attached to the outer periphery for protection and strength improvement of the solar cell module.
[0015]
As shown in FIG. 2A, the short side frame 1 and the long side frame 9 are made of an extruded material of an aluminum alloy, and are formed at the time of extrusion. Further, as shown in FIG. 2B, after the end 22 is cut obliquely, a surface treatment such as alumite treatment or painting is performed. Therefore, the part other than the cut end 22 is electrically insulated. . Therefore, as shown in FIG. 2C, a portion of the protruding portion 1a mounted on the horizontal rack is cut out so that the contact portion 1b is electrically connected. According to this configuration / method, even in the manufacturing process of the short side frame 1, only one step of cutting out a part of the protruding portion 1a can be added, so that the number of manufacturing steps hardly increases and the operation is complicated. Absent.
[0016]
Hereinafter, a method of installing the photovoltaic power generation device of the present invention on a roof will be described according to a construction procedure. As shown in FIG. 3A, fixing means K (K1 to K6) are fixed to a roofing material 7 such as a slate tile arranged on a roof of a house or the like. Next, as shown in FIG. 3 (b), the horizontal racks 4 (4a, 4b, 4c) are horizontally arranged on the roof at regular intervals with the fixing means K1 and K2, K3 and K4, and K5 and K6 as a pair. insert. Here, the fixing means K and the horizontal rack 4 are made of a metal such as an aluminum alloy or a steel material subjected to a weather-resistant surface treatment, a resin, or the like. Thereafter, as shown in FIG. 3C, the solar cell module 13 is supported on the ridge side of the horizontal rack 4a and on the eave side of the horizontal rack 4b.
[0017]
FIG. 4 shows the details of the mounting state at this time. In the fixing means K, the fixing member 2 penetrates the roof material 7 via the sealing material 6 with the screw 5 and is fixed to the field board 8 or the rafter. The sealing material 6 is preferably a material having an effect of preventing intrusion of rainwater or the like from a penetration portion of the roof material 7 and an effect of buffering a load applied to the roof material from the horizontal rack 4 and made of butyl rubber or foam rubber. Use In order to prevent rainwater from entering the screw 5, a packing 5a, which is a sealing member, is attached to the neck of the screw 5. The fixing member 2 is provided with a slit on the upper surface, and the holding member A is inserted into the slit. The holding member A can freely move inside the fixing member 2.
[0018]
The bottom of the holding member A has a height that does not sink into the fixing member 2, and the upper portion is exposed on the fixing member 2. A holding member B is attached to one end of the holding member A with a screw 3. By tightening the screw 3, the movement of the holding member A can be stopped and fixed at an arbitrary position on the fixing member 2. The horizontal rack 4 is inserted into the holding member A, and the horizontal rack 4 can be fixed together with the holding member A at an arbitrary position on the fixing member 2 by tightening the screw 3.
[0019]
On the other hand, fastening screws 11 are attached to the fixed cover 10 so that the screws can be screwed with screw holes provided in the horizontal rack 4, and the solar cell module 13 is inserted between the fixed cover 10 and the horizontal rack 4. The screw is fixed in the state. At this time, the contact portions 1b of the short side frame 1 at both ends of the solar cell module 13 come into electrical contact with the horizontal rack 4 so that the rack is grounded.
[0020]
Next, how the solar cell module 13 is fixed by the horizontal rack 4 and the fixing means K will be described. As shown in FIG. 7, when fixing the solar cell module 13 between the horizontal racks 4a and 4b attached to the fixing means K1 and K3 fixed on the roof, first, an opening which is a concave portion of the horizontal rack 4b. The ridge side 13b of the solar cell module 13 is inserted into 16c. Thereafter, the eave side 13a is inserted into the opening 16a, which is a recess formed by the fixed cover 10a and the horizontal rail 4a. At this time, if the solar cell module is not arranged on the eaves side of the horizontal rack 4a, the fastening screw 11a is tightened.
[0021]
Thereby, the eaves side of the solar cell module 13 is sandwiched and fixed between the fixed cover 10a and the horizontal rail 4a. At the same time, the contact portion of the solar cell module and the horizontal racks 4a and 4b are pressed, so that the short side frame and the horizontal rack of the solar cell module are in an electrically conductive state, and the horizontal rail 4a on the eaves side and the horizontal rail on the ridge side. 4b is electrically conductive.
[0022]
On the other hand, when there is a solar cell module 23 disposed on the ridge side of the horizontal rack 4b, the solar cell module 23 is inserted into the opening 16b and the fastening screw 11b is tightened by the same procedure, and the ridge side of the solar cell module 13 and the solar cell The eaves side of the module 23 is sandwiched and fixed between the fixed cover 10b and the horizontal rail 4b. Thereby, the contact part of the solar cell module 23 and the horizontal rack 4b are pressed, and the short side frame of the solar cell module 23 and the horizontal rack 4b are in an electrically conductive state.
[0023]
As shown in FIGS. 5A and 5B, after the arrangement of all the solar cell modules and the wiring check are completed, the screws of the fixing covers of the horizontal racks 4a, 4b, 4c are tightened and fixed. The battery array is completed, and at the same time, the contact portion and the horizontal rack on the short side frame 1 of the solar cell module are pressed, so that the short side frame 1 and the horizontal rack 4 of the solar cell module are electrically connected. Become. Since the short side frame 1 is mounted over the adjacent horizontal racks (for example, 4a and 4b), the adjacent horizontal racks are also electrically connected, and all the horizontal racks are electrically connected. Therefore, if one of the horizontal racks is grounded, all the horizontal racks can be grounded.
[0024]
In addition, the length of the horizontal rack may be made longer so as to be supported by a large number of fixing means K. The installation of the solar cell modules may be started from the roof ridge side, and the screws may be sequentially fixed from the place where the arrangement of the solar cell modules on the horizontal rail is completed. The grounding to the ground may be performed after the horizontal rack is installed, or the grounding may be performed from the fixing bracket K to the ground.
[0025]
An embodiment of a grounding method that does not use a solar cell module frame according to the present invention will be described with reference to FIG. Similarly to the above-described embodiment, a screw hole 21 for attaching a screw is provided in the fixed cover 10 of the installed photovoltaic device, and a metal side cover 19 is attached to a side surface of the photovoltaic device installed on the roof. At 20, it attaches to the fixed cover (for example, 10a, 10b) on the adjacent horizontal rack. At this time, if the periphery of the mounting screw hole 18 of the side cover 19 is left unpainted, electrical continuity is secured by the side cover 19 between the fixed covers on adjacent horizontal racks. If one place is grounded, all solar cell modules and horizontal racks can be grounded. Further, even if the mounting screw holes are painted, a structure in which the coating film (insulating film) is broken by tightening the mounting screws 19, such as a leaf washer, may be used.
[0026]
Thereby, even if the short side frame 1 and the long side frame 9 of the solar cell module 33 are made of resin or a non-conductive material, not only can all the solar cell modules and the horizontal rack be grounded, but also The appearance of the power generation device can be improved, and a function of preventing a bird or the like from entering under the solar cell module 13 can be provided.
[0027]
Note that, in the present embodiment, a plurality of horizontal racks are arranged substantially parallel to each other in the ridge-eave direction of the inclined roof, and a flat plate having a metal frame is provided on each of the horizontal racks located on the ridge side and the eave side. Each of the ridge side and the eave side of the solar cell module is placed, and the ridge side of the solar cell module is placed in each of two recesses formed by the horizontal rack and the fixed cover that covers the horizontal rack. And a photovoltaic power generation device that houses each of the eaves side edges, in particular, for a solar cell module mounted on a horizontal rack, fastening means for pressing between the fixed cover and the horizontal rack. However, the present invention is not limited to this, and an appropriate method and configuration can be adopted without departing from the gist of the invention.
[0028]
【The invention's effect】
According to the photovoltaic power generator of the present invention, the surface of the metal frame on the side in contact with the support member is formed in a stepped shape, and in the metal frame, at least the surface excluding the surface on the side in contact with the support member is provided. Covered with an insulating coating eliminates the need for new parts for grounding and installation of members on the roof, making installation work on the roof easy and requires few man-hours. A photovoltaic device can be provided.
[0029]
In addition, by providing a metal cover that is attached to a plurality of racks in a direction orthogonal to the rack at the end of the rack that grounds the solar cell module, the appearance of the solar power generation device and the installation roof is improved. Even when the frame of the solar cell module is made of a non-conductive material, the solar cell module can be grounded.
[0030]
Furthermore, by closing the gap between the photovoltaic power generator and the roof surface with a metal cover, birds and the like can be prevented from entering below the solar cell module and generating noise and dirt.
[Brief description of the drawings]
FIGS. 1A and 1B are a plan view and a perspective view showing a frame structure of a solar cell module of a photovoltaic power generator according to the present invention.
2 (a) to 2 (c) are perspective views showing processing steps of a solar cell module frame according to the present invention.
FIGS. 3A to 3C. FIG. It is a top view which shows each Embodiment of the mounting structure of the solar cell module according to this invention according to a work procedure.
FIG. 4 is a partial cross-sectional view schematically illustrating details of a mounting structure of the solar power generation device according to the present invention.
FIGS. 5 (a) and 5 (b) are plan views showing an embodiment of a solar cell module mounting structure according to the present invention in accordance with work procedures.
FIG. 6 is a plan view showing the structure of the solar cell module.
FIG. 7 is a partial cross-sectional view schematically showing details of a solar cell module fixing structure of the solar power generation device according to the present invention.
FIG. 8 is a partial sectional view schematically showing another embodiment of the photovoltaic power generator according to the present invention.
FIG. 9 is a perspective view showing an embodiment in which a conventional solar cell module is installed on a roof.
[Explanation of symbols]
1, short side frame 1a: projecting portion 1b: contact portion 2: fixing member 3: screw 4, 4a, 4b, 4c: horizontal rack 5: fixing screw 5a: packing 6, sealing material 7, roof material 8. : Base plate 9: Long side frame 10, 10 a, 10 b: Fixed cover 11 a, 11 b: Fastening screw 13: Solar cell module 13 a: Eave side 13 b: Building side 14: Transparent substrate 15: Solar cell element 16 a 16b, 16c: Opening (recess)
18: Mounting screw hole 19: Side cover 20: Mounting screw 21: Screw hole 22: End surface 23: Solar cell module 33: Solar cell module A: Holding member A
B: clamping member B
K, K1, K2, K3, K4, K5, K6: fixing means 100: vertical beam 101: horizontal beam 102: solar cell module with frame

Claims (1)

A photovoltaic power generation device comprising: a solar cell module having a metal frame mounted on a peripheral portion of a solar cell main body, and mounted on a conductor of a grounded support member in a state in which the metal frame is in contact with the solar cell module. The surface on the side contacting the support member is formed in a stepped shape, and at least the surface of the metal frame except the surface on the side contacting the support member is covered with an insulating coating. Solar power generator.

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