Fixture, solar power generation device installation structure

Abstract

To provide a fixture capable of restraining wind having passed between a frame member and an installation surface from blowing into a gap between a solar power generation device and the installation surface, so that vibration which might be caused on the solar power generation device due to the lift force of the wind can be inhibited.SOLUTION: A fixture 4 in the present invention is used for fixing a solar power generation device 3 to be installed on an installation surface 2, comprising a frame member 50, a holding member 51, a closing material 52. The frame member 50 is arranged on the periphery of the solar power generation device 3, one side 53 of its width being arranged on the outer marginal part 13 of the solar power generation device 3 while the other side 54 of the width being arranged on the installation surface 2 outside the solar power generation device 3. The holding member 51 presses down the frame member 50 towards the installation surface 2. The closing material 52 is adhered to the surface of the other side 54 of the frame width and to the installation surface 2 so as to close the part between the other side 54 of the frame width and the installation surface 2 on the whole circumference of the frame member 51.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixture for fixing a photovoltaic power generation device and an installation structure of a photovoltaic power generation device.

Background Art

[0002] Conventionally, a photovoltaic power generation device (for example, Patent Document 1) that generates electricity by the incidence of sunlight has been used. In order to install the photovoltaic power generation device on an installation surface, as shown in FIG. 11(A), one side portion 101 of the width of the frame member 100 is disposed on the outer edge portion 103 of the photovoltaic power generation device 102, and the other side portion 104 of the width of the frame member 100 is disposed on the installation surface 105 outside the photovoltaic power generation device 102. Then, the frame member 100 is pressed toward the installation surface 105 by a pressing member 106 such as a bolt, thereby fixing the photovoltaic power generation device 102.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when fixing the photovoltaic power generation device 102 as shown in FIG. 11(A), since one or both of the surface of the frame member 100 and the installation surface 105 are not completely flat, a gap may be generated between the frame member 100 and the installation surface 105. And in this case, the wind 200 (FIG. 11(B)) that has passed between the frame member 100 and the installation surface 105 is blown into the space between the photovoltaic power generation device 102 and the installation surface 105, and the photovoltaic power generation device 102 vibrates violently due to the lift force of the wind 200, resulting in a situation where the photovoltaic power generation device 102 is damaged.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to suppress wind passing between a frame member and an installation surface from blowing into the space between a photovoltaic power generation device and the installation surface, and to provide a fixture and an installation structure for a photovoltaic power generation device capable of suppressing vibration of the photovoltaic power generation device caused by the lifting force of the wind.

Means for Solving the Problems

[0006] To achieve the above object, the present invention includes the subject matters described in the following items.

[0007] Item 1. A fixture for fixing a photovoltaic power generation device provided on an installation surface, a frame member provided around the photovoltaic power generation device, with one side of the width disposed on the outer edge of the photovoltaic power generation device and the other side of the width disposed on the installation surface outside the photovoltaic power generation device; a pressing member for pressing the frame member toward the installation surface side; A fixture comprising a first closing material adhered to the surface of the other side of the width and the installation surface so as to close the space between the other side of the width and the installation surface over the entire circumference of the frame member.

[0008] Item 2. The fixture according to Item 1, further comprising a second closing material adhered to the surface of the one side of the width and the surface of the photovoltaic power generation device so as to close the space between the one side of the width and the photovoltaic power generation device over the entire circumference of the frame member.

[0009] Item 3. The fixture according to Item 1 or 2, wherein the frame member has a cross-sectional shape with a constant thickness from one side edge in width to the other side edge in width.

[0010] Item 4. The fixture according to Item 1 or 2, wherein the frame member has a cross-sectional shape in which the one side in width is bent with respect to the other side in width.

[0011] Item 5. An installation surface, a photovoltaic power generation device provided on the installation surface, and a fixture for fixing the photovoltaic power generation device, The fixture is A frame member provided around the photovoltaic power generation device, with one side of the width disposed on the outer edge of the photovoltaic power generation device and the other side of the width disposed on the installation surface outside the photovoltaic power generation device, and A pressing member that presses the frame member toward the installation surface side, and An installation structure of a photovoltaic power generation device including a first closing material adhered to the surface of the other side of the width and the installation surface so as to close the space between the other side of the width and the installation surface.

[0012] Item 6. The installation structure of the photovoltaic power generation device according to item 5, wherein the fixture further includes a second closing material adhered to the surface of the one side of the width and the surface of the photovoltaic power generation device so as to close the space between the one side of the width and the photovoltaic power generation device.

[0013] Item 7. The installation structure of the photovoltaic power generation device according to item 5 or 6, wherein the bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

[0014] Item 8. The installation structure of the photovoltaic power generation device according to any one of items 5 to 7, wherein the bending modulus of elasticity of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

[0015] Item 9. The installation structure of the photovoltaic power generation device according to any one of items 5 to 8, wherein the bending radius of the photovoltaic power generation device is 10 cm or less.

Advantages of the Invention

[0016] According to the present invention, it is possible to suppress the wind passing between the frame member and the installation surface from being blown into the space between the photovoltaic power generation device and the installation surface, thereby suppressing the vibration of the photovoltaic power generation device due to the lifting force of the wind.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing an installation structure 1 of a photovoltaic power generation device 3 according to an embodiment of the present invention. FIG. 2(A) is a cross-sectional view showing a state where the installation structure 1 is cut along line A-A in FIG. 1. FIG. 2(B) is a cross-sectional view showing a state where the installation structure 1 is cut along line B-B in FIG. 1.

[0019] The installation structure 1 according to the present embodiment includes an installation surface 2, a photovoltaic power generation device 3 provided on the installation surface 2, and a fixture 4 for fixing the photovoltaic power generation device 3.

[0020] The installation surface 2 is constituted by the surface of a building material. Examples of the building material include a roofing material, a wall material (such as a metal siding material, a ceramic siding material, a sandwich panel, etc.), a partition, a door material, a fence material, a floor material, etc. Examples of the roofing material include roofing materials used for a folded plate roof, a slate roof, a roof deck, a tile batten roof, a standing seam roof, etc. The roof may be a vertical tile roof or a horizontal tile roof. It should be noted that the present invention does not limit the member having the installation surface 2 to the above-mentioned building materials, and the installation surface 2 may be constituted by the surface of a paving body forming a road, or may be the surface of a structure such as an automobile, a train, or a ship. In the illustrated example, the installation surface 2 is a flat surface, but it may be a curved surface. Also, the material of the member constituting the installation surface 2 is not particularly limited, and for example, it may be metal, resin, asphalt, or concrete.

[0021] (Photovoltaic power generation device 3) FIG. 3(A) is a cross-sectional view showing a state where the photovoltaic power generation device 3 is cut. FIG. 3(B) is an enlarged view of a portion a in FIG. 3(A). FIG. 3(C) is a cross-sectional view showing a state where the power generation unit 10 is cut along line A-A in FIG. 3(A).

[0022] The photovoltaic device 3 has a power generation unit 10 and a sealing agent 11 disposed between a barrier sheet 5 and a back sheet 6, and the sealing agent 11 is filled around the power generation unit 10. A sealing edge material 12 for sealing between the outer peripheral edge of the barrier sheet 5 and the outer peripheral edge of the back sheet 6 is provided at the outer peripheral edge of the photovoltaic device 3. The photovoltaic device 3 generates electricity in the power generation unit 10 when light irradiated on the surface 7 of the barrier sheet 5 enters the power generation unit 10.

[0023] The photovoltaic device 3 is in a sheet shape. As used in this specification, the "sheet shape" means a shape in which the thickness of the object is 10% or less with respect to the maximum length between the outer edges in a plan view. For example, when the shape in a plan view is rectangular, the "maximum length between the outer edges in a plan view" means the length of the diagonal. Also, for example, when the shape in a plan view is circular, the "maximum length between the outer edges in a plan view" means the length of the diameter. In this specification, a film shape, a foil shape, a film-like shape, etc. are also included in the "sheet shape".

[0024] The photovoltaic device 3 is formed in a substantially rectangular shape when viewed from the front. However, the present invention does not particularly limit the shape of the photovoltaic device 3, and the photovoltaic device 3 may be, for example, substantially circular in a plan view, elliptical in a plan view, polygonal in a plan view, etc.

[0025] The solar power generation device 3 has flexibility (the property that an object can be bent). In the present invention, for the solar power generation device 3 to have flexibility means that the solar power generation device 3 has a flexural strength of 10 MPa or more, or that the solar power generation device 3 has a flexural modulus of 100 MPa or more. The flexural strength of the solar power generation device 3 is more preferably 20 MPa or more, and more preferably 50 MPa or more. Also, the flexural strength of the solar power generation device 3 is preferably 200 MPa or less, more preferably 150 MPa or less, and more preferably 50 MPa or less. Also, the flexural modulus of the solar power generation device 3 is more preferably 500 MPa or more. Also, the flexural modulus of the solar power generation device 3 is preferably 10,000 MPa or less, and more preferably 5,000 MPa or less. When evaluating the flexibility of the solar power generation device 3 by flexural strength, the flexural modulus may not be within the above range. When evaluating the flexibility of the solar power generation device 3 by flexural modulus, the flexural strength may not be within the above range. The measuring methods for the flexural strength and flexural modulus of the solar power generation device 3 are measured in accordance with JIS K 7171. The bending radius of the solar power generation device 3 is preferably 10 cm or less, and the bending radius of the solar power generation device 3 is measured using an R caliper (radius measuring instrument) or the like.

[0026] (Backsheet 6) The backsheet 6 has a barrier performance against water vapor and a protection performance against external forces. The backsheet 6 may have translucency, but translucency is not necessarily required. As used herein, "having translucency" means that the light transmittance is greater than 15% with respect to the peak wavelength of the light before incidence. Examples of the material of the backsheet 6 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, vinyl resins (e.g., polyvinyl chloride), natural resins, rubbers, metals, carbon, pulp, and the like.

[0027] The longitudinal elastic modulus of the backsheet 6 is preferably 2400 MPa or more, more preferably 3000 MPa or more. Also, the longitudinal elastic modulus of the backsheet 6 is preferably 4200 MPa or less, more preferably 3100 MPa or less. Examples of the material of the backsheet 6 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, and vinyl resins (e.g., polyvinyl chloride). Further, as the material of the backsheet 6, in addition to synthetic resins, for example, natural resins, rubbers, metals, carbon, pulp, etc. may be used.

[0028] The thickness of the backsheet 6 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the backsheet 6 is preferably 2000 μm or less, more preferably 1000 μm or less.

[0029] (Power generation unit 10) The power generation unit 10 includes a power generation cell 20 which is a photoelectric conversion element utilizing the photovoltaic effect. In the present embodiment, the power generation unit 10 is composed of a photoelectric conversion unit in which a plurality of power generation cells 20 are arranged in the plane direction of the solar power generation device 3 (for example, the longitudinal direction or the width direction of the solar power generation device 3). Note that the power generation unit 10 may be composed of one power generation cell 20.

[0030] (Power generation cell 20) The power generation cell 20 includes a light-transmissive base material 21, a light-transmissive conductive layer 22, a power generation layer 23, and an electrode 24. The light-transmissive base material 21, the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24 are laminated in this order along the direction from the barrier sheet 5 toward the backsheet 6. That is, the light-transmissive base material 21 faces the barrier sheet 5, and the electrode 24 is arranged to face the backsheet 6.

[0031] (Light-transmissive base material 21) The light-transmissive substrate 21 supports a light-transmissive conductive layer 22, a power generation layer 23, and an electrode 24. The light-transmissive substrate 21 has light transmittance. The light transmittance of the light-transmissive substrate 21 only needs to be greater than 15% with respect to the peak wavelength of the light before incidence, but is preferably 50% or more, and more preferably 80% or more. In this specification, when the light transmittance is 80% or more with respect to the peak wavelength of the light before incidence, it is regarded as "transparent".

[0032] Examples of the material of the light-transmissive substrate 21 include inorganic materials, organic materials, and metal materials. Examples of the inorganic materials include quartz glass and non-alkali glass. Examples of the organic materials include plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene, polyimide, polyamide, polyamideimide, liquid crystal polymer, and cycloolefin polymer, and polymer films. Examples of the metal materials include stainless steel, aluminum, titanium, and silicon.

[0033] The thickness of the light-transmissive substrate 21 is not particularly limited as long as it can support the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24, and examples thereof include 10 μm or more and 300 μm or less.

[0034] The light-transmissive substrate 21 is a substrate required in the manufacturing process of the power generation cell 20 and is not necessarily an essential configuration. The light-transmissive substrate 21 may be used, for example, only during the manufacturing process of the solar power generation device 3, and may be removed after manufacturing or during manufacturing. In addition, when removed, a substrate having no light transmittance may be used instead of the light-transmissive substrate 21.

[0035] (Light-transmissive conductive layer 22) The light-transmissive conductive layer 22 is a conductive layer and functions as a cathode. The light-transmissive conductive layer 22 has light transmittance. The light-transmissive conductive layer 22 is preferably transparent.

[0036] Examples of the transparent conductive layer 22 include transparent materials such as indium tin oxide (ITO), F-doped tin oxide (FTO), and Nesa film. The transparent conductive layer 22 is formed on the surface of the transparent substrate by, for example, sputtering, ion plating, plating, coating, or the like.

[0037] Alternatively, the transparent conductive layer 22 may be configured to have light transmissivity by forming a pattern that allows light to pass through while using an opaque material. Examples of the opaque material include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these. Examples of the pattern that allows light to pass through include a lattice pattern, a linear pattern, a wavy pattern, a honeycomb pattern, a round hole pattern, and the like.

[0038] The thickness of the transparent conductive layer 22 is preferably, for example, 30 nm or more and 300 nm or less. When the transparent conductive layer 22 has a thickness of 30 nm or more and 300 nm or less, good conductivity can be obtained while maintaining high flexibility.

[0039] (Power generation layer 23) The power generation layer 23 is a layer that generates photoelectric conversion by irradiation with light, and generates electrons and holes from excitons generated by absorbing light. As shown in FIG. 3(B), the power generation layer 23 includes a hole transport layer 30, a photoelectric conversion layer 31, and an electron transport layer 32. The hole transport layer 30, the photoelectric conversion layer 31, and the electron transport layer 32 are laminated in this order along the direction from the transparent conductive layer 22 toward the electrode 24.

[0040] (Hole transport layer 30) The hole transport layer 30 extracts the holes generated in the photoelectric conversion layer 31 to the transparent conductive layer 22 and prevents the electrons generated in the photoelectric conversion layer 31 from moving to the transparent conductive layer 22. As the material of the hole transport layer 30, for example, metal oxides can be used. Examples of the metal oxides include titanium oxide, molybdenum oxide, vanadium oxide, zinc oxide, nickel oxide, lithium oxide, calcium oxide, cesium oxide, aluminum oxide, etc. In addition, other delafossite-type compound semiconductors (CuGaO2), copper oxide, copper thiocyanate (CuSCN), vanadium pentoxide (V2O5), graphene oxide, etc. may also be used. Further, a p-type organic semiconductor or a p-type inorganic semiconductor can also be used as the material of the hole transport layer 30.

[0041] The thickness of the hole transport layer 30 is preferably, for example, 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and still more preferably 10 nm or more and 50 nm or less. If the thickness of the hole transport layer 30 is 1 nm or more and 1000 nm or less, the transport of holes can be realized.

[0042] (Photoelectric conversion layer 31) The photoelectric conversion layer 31 (photoactive layer) is a layer that converts the absorbed light into electricity. The material of the photoelectric conversion layer 31 is not particularly limited as long as it can convert the absorbed light into electricity. For example, amorphous silicon, perovskite, non-silicon-based materials (semiconductor material CIGS), etc. are used. Further, the photoelectric conversion layer 31 may have a tandem-type laminated structure in which these are combined. The photoelectric conversion layer 31 using non-silicon-based materials uses a semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se), and it is easy to reduce the thickness of the photoelectric conversion layer.

[0043] Hereinafter, as an example of the case where the power generation unit 10 contains an organic component, a case where a perovskite compound containing an organic component is included in the photoelectric conversion layer 31 of the power generation unit 10 will be described. The photoelectric conversion layer 31 containing the perovskite compound has an advantage that the dependence of the power generation efficiency on the angle of incident light (hereinafter sometimes referred to as the incident angle dependence) is relatively low. Thereby, in the present embodiment, higher power generation efficiency can be obtained.

[0044] The perovskite compound is a perovskite crystal structure and a structure having a crystal similar thereto. The perovskite crystal structure is represented by the composition formula ABX3. In this composition formula, for example, A represents an organic cation, B represents a metal cation, and X represents a halogen anion. However, the A site, B site, and X site are not limited thereto.

[0045] The organic group of the organic cation constituting the A site is not particularly limited, and examples thereof include an alkylammonium derivative and a formamidinium derivative. The organic cation constituting the A site may be one type or two or more types.

[0046] The metal of the metal cation constituting the B site is not particularly limited, and examples thereof include Cu, Ni, Mn, Fe, Co, Pd, Ge, Sn, Pb, Eu, etc. The metal cation constituting the B site may be one type or two or more types.

[0047] The halogen of the halogen anion constituting the X site is not particularly limited, and examples thereof include F, Cl, Br, I, etc. The halogen anion constituting the X site may be one type or two or more types.

[0048] The thickness of the photoelectric conversion layer 31 is preferably, for example, 1 nm or more and 1,000,000 nm or less, more preferably 100 nm or more and 50,000 nm or less, and still more preferably 300 nm or more and 1000 nm or less. When the thickness of the photoelectric conversion layer 31 is 1 nm or more and 1,000,000 nm or less, the photoelectric conversion efficiency is improved.

[0049] (Electron transport layer 32) The electron transport layer 32 extracts the electrons generated in the photoelectric conversion layer 31 to the electrode 24 and prevents the holes generated in the photoelectric conversion layer 31 from moving to the electrode 24. As the electron transport layer 32, for example, it is preferable to contain either a halogen compound or a metal oxide.

[0050] Examples of the halogen compound include lithium halides (LiF, LiCl, LiBr, LiI), sodium halides (NaF, NaCl, NaBr, NaI), etc. Examples of the elements constituting the metal oxide include titanium, molybdenum, vanadium, zinc, nickel, lithium, potassium, cesium, aluminum, niobium, tin, barium, etc. Also, an n-type organic semiconductor or an n-type inorganic semiconductor can be used as the material of the electron transport layer 32.

[0051] The thickness of the electron transport layer 32 is preferably, for example, 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and still more preferably 10 nm or more and 50 nm or less. If the thickness of the electron transport layer 32 is 1 nm or more and 1000 nm or less, the transport of electrons can be realized.

[0052] (Electrode 24) The electrode 24 has conductivity and functions as an anode. The electrode 24 can extract electrons from the photoelectric conversion layer 31 in response to the photoelectric conversion generated by the photoelectric conversion layer 31. The electrode 24 may be formed of a light-transmitting material or a light-blocking material. However, if the electrode 24 is formed of a light-blocking material, the light-shielding property of the solar power generation device 3 can be further improved (that is, the incidence of light from the opposite side of the surface 7 to the power generation unit 10 can be further suppressed). Examples of the material of the electrode 24 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or an alloy containing these.

[0053] (Barrier sheet 5) The barrier sheet 5 has translucency and constitutes the surface 7 of the photovoltaic power generation device 3 as described above. The barrier sheet 5 is preferably transparent. The barrier sheet 5 has a barrier performance against water vapor and a protection performance against external forces.

[0054] The barrier sheet 5 has flexibility. As the material used for the barrier sheet 5, the longitudinal elastic modulus is preferably 100 Pa or more and 10,000 MPa or less, more preferably 1,000 MPa or more and 5,000 MPa or less. Specifically, examples of the material of the barrier sheet 5 include plastic films and vinyl films.

[0055] The thickness of the barrier sheet 5 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the barrier sheet 5 is preferably 2,000 μm or less, more preferably 1,000 μm or less. When the thickness of the barrier sheet 5 is 50 μm or more and 2,000 μm or less, it is easy to set the bending strength of the photovoltaic power generation device 3 to 50 MPa or more and 150 MPa or less.

[0056] (Sealing agent 11) The sealing agent 11 prevents water from entering the power generation layer 23 from the periphery of the power generation layer 23. The sealing agent 11 has translucency and is preferably transparent. Note that the sealing agent 11 does not necessarily need to cover all of the power generation unit 10. For example, when a part of the power generation unit 10 is exposed from the sealing agent 11, the exposed part may be covered with a sealing edge material 12 or the like.

[0057] Examples of the material of the sealing agent 11 include ethylene vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, SBS resin, SIBS resin, and epoxy resin.

[0058] The transverse elastic modulus of the sealant 11 is preferably 0.01 or more and 500 MPa or less, more preferably 0.05 or more and 250 MPa or less, and still more preferably 0.1 or more and 100 MPa or less. By doing so, the sealant 11 deforms in the plane direction following the thermal expansion and contraction caused by the temperature difference between the backsheet 6 and the barrier sheet 5. Thereby, it is possible to suppress the backsheet 6 and the barrier sheet 5 from peeling off from the sealant 11 due to the shear stress generated by the thermal expansion and contraction. The "transverse elastic modulus" referred to in the present application is, for example, a value calculated from the longitudinal elastic modulus and Poisson's ratio obtained by the tensile test method.

[0059] Also, from another perspective, the sealant 11 can be defined by viscosity. The viscosity of the sealant 11 is preferably 11000 mPa·S or more and 700000 mPa·S or less, more preferably 26000 mPa·S or more and 450000 mPa·S or less, and still more preferably 40000 mPa·S or more and 110000 mPa·S or less.

[0060] Examples of the material of the sealant 11 in this case include polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, etc. The "viscosity" referred to in this specification is a value measured at an environmental temperature of 23°C in accordance with the rotational viscometer method of JIS Z8803.

[0061] The backsheet 6 and the barrier sheet 5 are adhered via the sealant 11, and the adhesion strength is preferably 0.1 N / 10 mm or more and 10 N / 10 mm or less in the peel test. In particular, when it is constructed in a bent state, the shear stress generated in the solar power generation device 3 becomes larger. Therefore, by adopting the adhesion strength within the above range in the peel test, long-term peeling can be effectively suppressed. The peel test is performed in accordance with JIS Z 0237.

[0062] From the viewpoint of enhancing the effect of suppressing peeling, the thickness of the sealing agent 11 is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 50 μm or more. On the other hand, the thickness of the sealing agent 11 is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less. By setting the thickness of the sealing agent 11 to 10 μm or more, a sufficient clearance for shear stress during thermal expansion and contraction can be ensured. By setting the thickness of the sealing agent 11 to 300 μm or less, the weight of the photovoltaic power generation device 3 can be reduced, thereby improving workability and constructability.

[0063] Note that the sealing agent 11 is not necessarily required and may not be provided. When the sealing agent 11 is not provided, in the photovoltaic power generation device 3, for example, only the power generation unit 10 is disposed between the barrier sheet 5 and the back sheet 6, and the barrier sheet 5 and the back sheet 6 are each adhered to the power generation unit 10.

[0064] (Sealing edge material 12) The sealing edge material 12 has a structure in which a first adhesive portion 40 adhered to the surface 7 of the barrier sheet 5, a sealing portion 41 that seals between the outer peripheral edge of the barrier sheet 5 and the outer peripheral edge of the back sheet 6, and a second adhesive portion 42 adhered to the surface 8 of the back sheet 6 are sequentially connected.

[0065] Examples of the material of the sealing edge material 12 include tape materials made of butyl rubber, silicone rubber, and the like.

[0066] The sealing edge material 12 is not necessarily required. For example, the edge portion of the barrier sheet 5 may be bent toward the back sheet 6 side, and the bent tip may be joined to the back sheet 6. Alternatively, the edge portion of the back sheet 6 may be bent toward the barrier sheet 5 side, and the bent tip may be joined to the barrier sheet 5. By doing so, the sealing edge material 12 becomes unnecessary.

[0067] (Operation of the photovoltaic power generation device 3) According to the above-described solar power generation device 3, when the light irradiated on the surface 7 of the barrier sheet 5 enters the power generation unit 10, the photoelectric conversion layer 31 of the power generation layer 23 absorbs the light and performs photoelectric conversion, thereby generating electrons and holes in the photoelectric conversion layer 31. The electrons are extracted to the electrode 24 (anode) through the electron transport layer 32, and the holes are extracted to the translucent conductive layer 22 (cathode) through the hole transport layer 30, so that a current flows from the translucent conductive layer 22 to the electrode 24 (i.e., power generation is performed).

[0068] In the photoelectric conversion unit constituting the power generation unit 10, an extension portion 24a is provided on the electrode 24 (anode) of each power generation cell 20 (FIG. 3(C)). The extension portion 24a of the electrode 24 extends toward the translucent conductive layer 22 (cathode). In two adjacent power generation cells 20, 20, the extension portion 24a of the electrode 24 of one cell 20 is joined to the translucent conductive layer 22 of the other cell 20. Due to this joining, while the solar power generation device 3 is irradiated with light, a current flows from the translucent conductive layer 22A at one end of the power generation unit 10 (photoelectric conversion unit) to the electrode 24A at the other end of the power generation unit 10 (the flow of the current is indicated by an arrow in FIG. 3(C)). The current is taken out through a power distribution line (not shown).

[0069] By configuring the power generation unit 10 from the above-described photoelectric conversion units, even if a problem occurs in some of the power generation cells 20, the amount of electricity taken out from the power generation unit 10 can be stabilized.

[0070] Instead of providing the extension portion 24a on the electrode 24 (anode) of each power generation cell 20, an extension portion extending toward the electrode 24 (anode) side may be provided on the translucent conductive layer 22 (cathode) of each power generation cell 20. In this case, in two adjacent power generation cells 20, 20, the extension portion of the translucent conductive layer 22 of one cell 20 is joined to the electrode 24 of the other cell 20. Even in this way, the same effect as above can be obtained.

[0071] When the light-transmissive base material 21 is provided in the power generation unit 10, from the viewpoint of facilitating the manufacture of the power generation unit 10, as shown in FIG. 3(C), it is preferable that the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24 of each power generation cell 20 are supported by a common light-transmissive base material 21.

[0072] When the power generation unit 10 is composed of a single power generation cell 20, the current flowing from the electrode 24 to the light-transmissive conductive layer 22 is taken out via the power distribution line.

[0073] Note that the photovoltaic power generation device 3 may include a plurality of power generation units 10. In this case, the plurality of power generation units 10 are arranged in the plane direction of the photovoltaic power generation device 3 and are electrically connected in series or in parallel.

[0074] When the power generation unit 10 is composed of a photoelectric conversion unit, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the light-transmissive conductive layer 22A at one end of one power generation unit 10 and the electrode 24A at the end of the other power generation unit 10 are connected via a power distribution line. When connecting a plurality of power generation units 10 in parallel, the light-transmissive conductive layers 22A, 22A at the ends of two adjacent power generation units 10, 10 and the electrodes 24A, 24A at the ends of the two adjacent power generation units 10, 10 are respectively connected via a power distribution line.

[0075] When the power generation unit 10 is composed of a single power generation cell 20, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the light-transmissive conductive layer 22 of one power generation unit 10 and the electrode 24 of the other power generation unit 10 are connected via a power distribution line. When connecting a plurality of power generation units 10 in parallel, the light-transmissive conductive layers 22, 22 of two adjacent power generation units 10, 10 and the electrodes 24, 24 of the two adjacent power generation units 10, 10 are respectively connected via a power distribution line.

[0076] In addition, in the case where the power generation unit 10 is composed of any of the above-described photoelectric conversion units and one power generation cell 20, the distance between adjacent power generation units 10, 10 may be more than 0 mm, preferably 2 mm or more, more preferably 5 mm or more, still more preferably 10 mm or more, and even more preferably 15 mm or more. Further, the distance between adjacent power generation units 10, 10 is preferably 100 mm or less, more preferably 50 mm or less, and still more preferably 20 mm or less.

[0077] (Fixture 4) The fixture 4 (Figs. 1 and 2) includes a frame member 50, a pressing member 51, and a closing member 52 (the closing member 52 corresponds to the first closing member described in the claims).

[0078] As shown in Fig. 1, the frame member 50 is annular and is provided around the solar power generation device 3. As shown in Fig. 2, one width side portion 53 of the frame member 50 is disposed on the outer edge portion 13 of the solar power generation device 3, and the other width side portion 54 of the frame member 50 is disposed on the installation surface 2 outside the solar power generation device 3 (one width side portion 53 of the frame member 50 corresponds to the inner peripheral side of the frame member 50, and the other width side portion 54 of the frame member 50 corresponds to the outer peripheral side of the frame member 50). The frame member 50 has a constant cross-sectional shape from one width side edge 55 to the other width side edge 56 (one width side edge 55 of the frame member 50 corresponds to the inner peripheral edge of the frame member 50, and the other width side edge 56 of the frame member 50 corresponds to the outer peripheral edge of the frame member 50).

[0079] The frame member 50 is formed of metal or resin. As the metal for forming the frame member 50, it is preferable to use a hard metal such as aluminum, cast iron, or stainless steel. As the resin for forming the frame member 50, it is preferable to use a hard resin reinforced with carbon fiber or glass fiber. Further, when the frame member 50 is formed of resin, it is preferable to make the color of the frame member 50 black in order to enhance the weather resistance of the frame member 50.

[0080] The pressing member 51 is a member that presses the frame member 50 toward the installation surface 2 side. In the present embodiment, as shown in Fig. 2(B), the pressing member 51 is composed of a bolt or a stud made of metal or resin in which a small-diameter shaft portion 58 extends from a large-diameter head portion 57. The tip side of the shaft portion 58 penetrating through the other width side portion 54 of the frame member 50 is penetrated under the installation surface 2, and the head portion 57 is pressed against the frame member 50, whereby the frame member 50 is pressed by the pressing member 51 toward the installation surface 2 side. Note that the tip side of the shaft portion 58 penetrating through the one width side portion 53 and the outer edge portion 13 of the frame member 50 may be penetrated under the installation surface 2 to press the head portion 57 against the frame member 50. The number and installation positions of the pressing members 51 are appropriately set according to the shape of the frame member 50 and the like. When a plurality of pressing members 51 are provided as in the illustrated example, it is preferable to arrange the pressing members 51 at equal intervals in the circumferential direction of the frame member 50. Further, the pressing member 51 may be composed of a clamp that sandwiches the frame member 50 and "the object (such as a building material) constituting the installation surface 2".

[0081] The closing material 52 is adhered to the surface of the other width side portion 54 and the installation surface 2 so as to block the space between the other width side portion 54 of the frame member 50 and the installation surface 2 over the entire circumference of the frame member 50 (specifically, the entire circumference of the outer periphery of the frame member 50).

[0082] As the material of the closing material 52, for example, silicone-based (such as organopolysiloxane), modified silicone-based (such as polyether having a silyl group at the end), polyurethane-based, or acrylic-based caulking agents can be used. Further, as the material of the closing material 52, a two-component sealing material or a one-component sealing material may be used. When a two-component sealing material is used, it is preferable to include one or both of a substance (crosslinking agent) that reacts with the raw material polymer and a catalyst in the closing material. When a one-component sealing material is used, it is preferable to include an organometallic compound such as tin, an amine compound, or a metal oxide in the closing material. Further, as the material of the closing material 52, a cement-based or clay-based joint material may be used.

[0083] From the perspective of workability, the blocking material 52 is preferably a tape material formed from the above materials. In this way, equipment such as cylinders becomes unnecessary, thus improving workability. Further, the blocking material 52 may be a self-fusing tape containing butyl in addition to the above materials.

[0084] (Function and Effect) According to the fixture 4 and the installation structure 1 according to this embodiment, the space between the other side portion 54 of the width of the frame member 50 and the installation surface 2 is blocked by the blocking material 52. Therefore, it is possible to suppress the wind from passing between the frame member 50 and the installation surface 2. As a result, it is possible to suppress the wind passing between the frame member 50 and the installation surface 2 from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2. Therefore, it is possible to suppress the photovoltaic power generation device 3 from vibrating due to the lifting force of the wind, thus avoiding the situation where the photovoltaic power generation device 3 is damaged due to vibration.

[0085] (Modification Example) The present invention is not limited to the above embodiment and can be variously modified. Hereinafter, modification examples of the present invention will be described. In the following description, the differences from the above embodiment will be described, and the same reference numerals will be given to the points common to the above embodiment, and the description thereof will be omitted.

[0086] For example, the installation structure of the photovoltaic power generation device of the present invention can be modified as shown in FIGS. 4 and 5. FIG. 4 is a plan view showing an installation structure 60 of a photovoltaic power generation device 3 according to a modification example of the present invention. FIG. 5(A) is a cross-sectional view showing the installation structure 60 cut along the line A-A in FIG. 4. FIG. 5(B) is a cross-sectional view showing the installation structure 60 cut along the line B-B in FIG. 1.

[0087] The installation structure 60 shown in FIGS. 4 and 5 includes an installation surface 2, a photovoltaic power generation device 3 provided on the installation surface 2, and a fixture 61 for fixing the photovoltaic power generation device 3. The fixture 61 includes a blocking material 62 in addition to the frame member 50, the pressing member 51, and the blocking material 52 shown in the above embodiment (the blocking material 62 corresponds to the second blocking material described in the claims).

[0088] The blocking material 62 is adhered to the surface of the one-width side portion 53 of the frame member 50 and the surface of the photovoltaic power generation device 3 so as to block the space between the one-width side portion 53 of the frame member 50 and the photovoltaic power generation device 3 over the entire circumference of the frame member 50 (specifically, the entire inner circumference of the frame member 50).

[0089] As the material of the blocking material 62, for example, silicone-based (such as organopolysiloxane), modified silicone-based (such as polyether having a silyl group at the end), polyurethane-based, or acrylic-based caulking agents can be used. Also, as the material of the blocking material 62, a two-component sealing material or a one-component sealing material may be used. When a two-component sealing material is used, it is preferable to include one or both of a substance (crosslinking agent) that reacts with the raw material polymer and a catalyst in the blocking material. When a one-component sealing material is used, it is preferable to include an organometallic compound such as tin, an amine compound, or a metal oxide in the blocking material. Also, as the material of the blocking material 62, a cement-based or clay-based joint material may be used. From the viewpoint of workability, the blocking material 62 is preferably a tape material formed from the above materials. Also, the blocking material 62 may be a self-fusing tape containing butyl in addition to the above materials.

[0090] According to the fixture 61 and the installation structure 60 shown in FIGS. 4 and 5, similar to the above embodiment, since the space between the other-width side portion 54 of the frame member 50 and the installation surface 2 is blocked by the blocking material 52, it is possible to suppress the wind from passing between the frame member 50 and the installation surface 2. Also, since the space between the one-width side portion 53 of the frame member 50 and the photovoltaic power generation device 3 is blocked by the blocking material 62, it is possible to suppress the wind from passing between the frame member 50 and the photovoltaic power generation device 3. Therefore, it is possible to more reliably suppress the wind from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2 (that is, it is possible to suppress the wind passing between the frame member 50 and the installation surface 2 or the wind passing between the frame member 50 and the photovoltaic power generation device 3 from blowing into the space between the photovoltaic power generation device 3 and the installation surface 2). Thereby, it is possible to more reliably suppress the vibration of the photovoltaic power generation device 3 due to the lifting force of the wind.

[0091] Also, the installation structure of the present invention can be modified as shown in FIGS. 6 and 7. FIG. 6 is a plan view showing the installation structure 70 of the photovoltaic power generation device 3 according to a modified example of the present invention. FIG. 7(A) is a cross-sectional view showing a state in which the installation structure 70 is cut along the line A-A in FIG. 6. FIG. 7(B) is a cross-sectional view showing a state in which the installation structure 70 is cut along the line B-B in FIG. 6.

[0092] The installation structure 70 shown in FIGS. 6 and 7 includes an installation surface 2, a photovoltaic power generation device 3 provided on the installation surface 2, and a fixture 71 for fixing the photovoltaic power generation device 3. The fixture 71 includes a frame member 72, a pressing member 73, and a closing material 74 (the closing material 74 corresponds to the first closing material described in the claims).

[0093] As shown in FIG. 6, the frame member 72 is annular and is provided around the photovoltaic power generation device 3. One width side portion 75 of the frame member 72 is disposed on the outer edge portion 13 of the photovoltaic power generation device 3, and the other width side portion 76 of the frame member 72 is disposed on the installation surface 2 outside the photovoltaic power generation device 3. From the viewpoint of bringing the entire width of the one width side portion 75 into contact with the outer edge portion 13 and bringing the entire width of the other width side portion 76 into contact with the installation surface 2, the frame member 72 has a cross-sectional shape in which the one width side portion 55 is bent with respect to the other width side portion 56. The frame member 72 is formed of the same material as the frame member 50 shown in the above embodiment.

[0094] The pressing member 73 is a member that presses the frame member 72 toward the installation surface 2 side. As shown in FIG. 7(B), the pressing member 73 is composed of a bolt or a stud made of metal or resin, in which a large-diameter head 77 and a small-diameter shaft portion 78 extend. The tip side of the shaft portion 78 penetrating through the other width side portion 76 of the frame member 72 is penetrated under the installation surface 2, and the head 77 is pressed against the frame member 72, whereby the frame member 72 is pressed by the pressing member 73 toward the installation surface 2 side. Note that the tip side of the shaft portion 58 penetrating through the one width side portion 75 of the frame member 72 and the outer edge portion 13 of the photovoltaic power generation device 3 may be penetrated under the installation surface 2 to press the head 77 against the frame member 72. The number and installation position of the pressing members 73 are appropriately set according to the shape of the frame member 72 and the like. When a plurality of pressing members 73 are provided as in the illustrated example, it is preferable to arrange the pressing members 73 at equal intervals in the circumferential direction of the frame member 72. Further, the pressing member 73 may be composed of a clamp that sandwiches the frame member 72 and the "object (building material, etc.) constituting the installation surface 2".

[0095] The closing material 74 is adhered to the surface of the other width side portion 76 and the installation surface 2 so as to close the space between the other width side portion 76 of the frame member 72 and the installation surface 2 over the entire circumference of the frame member 72 (specifically, the entire circumference of the outer periphery of the frame member 72).

[0096] As the material of the closing material 74, for example, silicone-based (such as organopolysiloxane), modified silicone-based (such as polyether having a silyl group at the end), polyurethane-based, or acrylic-based caulking agents can be used. Further, as the material of the closing material 74, a two-component sealing material or a one-component sealing material may be used. When a two-component sealing material is used, it is preferable to include one or both of a substance (crosslinking agent) that reacts with the raw material polymer and a catalyst in the closing material. When a one-component sealing material is used, it is preferable to include an organometallic compound such as tin, an amine compound, or a metal oxide in the closing material. Further, as the material of the closing material 74, a cement-based or clay-based joint material may be used.

[0097] From the viewpoint of workability, it is preferable that the blocking material 74 is a tape material formed from the above materials. Further, the blocking material 74 may be a self-fusing tape containing butyl in addition to the above materials.

[0098] According to the fixture 71 and the installation structure 70 shown in FIGS. 6 and 7, the space between the other width side portion 76 of the frame member 72 and the installation surface 2 is blocked by the blocking material 74. Therefore, it is possible to suppress the wind from passing between the frame member 72 and the installation surface 2, and thus it is possible to suppress the wind passing between the frame member 72 and the installation surface 2 from blowing into the space between the solar power generation device 3 and the installation surface 2. Accordingly, it is possible to suppress the solar power generation device 3 from vibrating due to the lifting force of the wind, and thus avoid the situation where the solar power generation device 3 is damaged due to vibration.

[0099] Also, the installation structure of the present invention can be modified as shown in FIGS. 8 and 9. FIG. 8 is a plan view showing an installation structure 80 of the solar power generation device 3 according to a modified example of the present invention. FIG. 9(A) is a cross-sectional view showing the state where the installation structure 80 is cut along the line A-A in FIG. 8. FIG. 9(B) is a cross-sectional view showing the state where the installation structure 80 is cut along the line B-B in FIG. 8.

[0100] The installation structure 80 shown in FIGS. 8 and 9 includes an installation surface 2, a solar power generation device 3 provided on the installation surface 2, and a fixture 81 for fixing the solar power generation device 3. The fixture 81 includes a blocking material 82 in addition to the frame member 72, the pressing member 73, and the blocking material 74 shown in FIGS. 6 and 7 (the blocking material 82 corresponds to the second blocking material described in the claims).

[0101] The blocking material 82 is adhered to the surface of the one width side portion 75 and the surface of the solar power generation device 3 so as to block the space between the one width side portion 75 of the frame member 72 and the solar power generation device 3 over the entire circumference of the frame member 72 (specifically, the entire inner circumference of the frame member 72).

[0102] As the material of the blocking material 82, for example, silicone-based (such as organopolysiloxane), modified silicone-based (such as polyether with silyl group at the end), polyurethane-based, or acrylic-based caulking agents can be used. Also, as the material of the blocking material 82, a two-component sealing material or a one-component sealing material may be used. When a two-component sealing material is used, it is preferable to include one or both of a substance (crosslinking agent) that reacts with the raw material polymer and a catalyst in the blocking material. When a one-component sealing material is used, it is preferable to include an organometallic compound such as tin, an amine compound, or a metal oxide in the blocking material. Further, as the material of the blocking material 82, a cement-based or clay-based joint material may be used. From the viewpoint of workability, the blocking material 82 is preferably a tape material formed from the above materials. Also, the blocking material 82 may be a self-fusing tape containing butyl in addition to the above materials.

[0103] According to the fixture 81 and the installation structure 80 shown in FIGS. 8 and 9, similar to the example shown in FIGS. 6 and 7, since the space between the other side portion 76 of the width of the frame member 72 and the installation surface 2 is blocked by the blocking material 74, it is possible to suppress the wind from passing between the frame member 72 and the installation surface 2. Also, since the space between the one side portion 75 of the width of the frame member 72 and the solar power generation device 3 is blocked by the blocking material 82, it is possible to suppress the wind from passing between the frame member 72 and the solar power generation device 3. Therefore, it is possible to more reliably suppress the wind from blowing into the space between the solar power generation device 3 and the installation surface 2 (that is, to suppress the wind passing between the frame member 72 and the installation surface 2 or the wind passing between the frame member 72 and the solar power generation device 3 from blowing into the space between the solar power generation device 3 and the installation surface 2). Thereby, it is possible to more reliably suppress the vibration of the solar power generation device 3 due to the lifting force of the wind.

[0104] Also, in the above example, the installation structures 1, 60, 70, 80 and the fixtures 4, 61, 71, 81 are shown as examples having the annular frame members 50, 72. However, the installation structures 1, 60, 70, 80 and the fixtures 4, 61, 71, 81 may be provided with a frame member constituted by a plurality of frames arranged in the circumferential direction of the photovoltaic power generation device 3 (FIG. 10 shows an example in which the frame member 50 included in the installation structure 1 is constituted by a plurality of frames 50a arranged in the circumferential direction of the photovoltaic power generation device 3). In the above case, in the installation structures 1, 60, 70, 80 and the fixtures 4, 61, 71, 81, a part or the whole of each frame is arranged on the outer edge portion 13 of the photovoltaic power generation device 3, a pressing member is provided for each frame, and each pressing member presses the corresponding frame toward the installation surface 2 side.

Explanation of Signs

[0105] 1, 60, 70, 80 Installation structure 2 Installation surface 3 Photovoltaic power generation device 4, 61, 71, 81 Fixture 13 Outer edge portion of the photovoltaic power generation device 50, 72 Frame member 51, 73 Pressing member 52, 62, 74, 82 Closing material

Claims

1. A fixture for fixing a photovoltaic power generation device provided on an installation surface, a frame member provided around the photovoltaic power generation device, with one side of the width disposed on the outer edge of the photovoltaic power generation device and the other side of the width disposed on the installation surface outside the photovoltaic power generation device; a pressing member for pressing the frame member toward the installation surface side; and a fixture comprising a first sealing material adhered to the surface of the other side of the width and the installation surface so as to close the gap between the other side of the width and the installation surface over the entire circumference of the frame member.

2. The fixture according to claim 1, further comprising a second sealing material adhered to the surface of the one side of the width and the surface of the photovoltaic power generation device so as to close the gap between the one side of the width and the photovoltaic power generation device over the entire circumference of the frame member.

3. The fixture according to claim 1, wherein the frame member has a cross-sectional shape with a constant thickness from one side edge of the width to the other side edge of the width.

4. The fixture according to claim 1, wherein the frame member has a cross-sectional shape in which the one side of the width is bent with respect to the other side of the width.

5. An installation surface, a photovoltaic power generation device provided on the installation surface, and a fixture for fixing the photovoltaic power generation device, wherein the fixture includes a frame member provided around the photovoltaic power generation device, with one side of the width disposed on the outer edge of the photovoltaic power generation device and the other side of the width disposed on the installation surface outside the photovoltaic power generation device; a pressing member for pressing the frame member toward the installation surface side; and an installation structure of a photovoltaic power generation device comprising a first sealing material adhered to the surface of the other side of the width and the installation surface so as to close the gap between the other side of the width and the installation surface.

6. The installation structure of the photovoltaic power generation device according to claim 5, wherein the fixture further includes a second closing material adhered to the surface of the one-width side portion and the surface of the photovoltaic power generation device so as to block the space between the one-width side portion and the photovoltaic power generation device.

7. The installation structure of the photovoltaic power generation device according to claim 5, wherein the bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

8. The installation structure of the photovoltaic power generation device according to claim 5, wherein the bending modulus of elasticity of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

9. The installation structure of the photovoltaic power generation device according to claim 5, wherein the bending radius of the photovoltaic power generation device is 10 cm or less.

Images