JPH11340495A - Solar energy converter, manufacture thereof, building and roof panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability of electric insulation between a solar cell and a heat collecting panel by providing an insulation layer of synthetic resin paint of specified thickness on the surface of the heat collecting panel and superposing the heat collecting panel on a solar cell module while directing the surface toward the solar cell module. SOLUTION: A heat collecting panel 2 is a copper plate having high thermal conductivity incorporating water pipes 22 made of copper and an insulation layer 21 of 30 μm or thicker painted with an electrically insulating epoxy based paint is provided on the surface of the heat collecting panel 2. A solar energy converting body M comprises a solar cell module 1 and the heat collecting panel 2 superposed while directing the surface of the heat collecting panel 2 toward the solar cell module 1 and they are bonded integrally through an adhesive layer 14 appearing on the underside of the solar cell module 1. Consequently, electrodes or lead wires interconnecting the solar cells do not touch the heat collecting panel directly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar energy converter in which a solar cell module and a heat collecting panel are integrally mounted, a method of manufacturing the solar energy converter, and the solar energy converter attached. The present invention relates to a building and a roof panel into which the solar energy converter is incorporated.

[0002]

2. Description of the Related Art In recent years, as global environmental problems and energy depletion problems due to increased consumption of fossil fuels have become more serious, panel-shaped solar cell modules have been installed on roofs of houses and the like to provide clean solar cells. A solar power generation system for homes that directly extracts power from energy and supplies it to houses, and a solar heating system for homes that also installs heat collection panels on the roof to capture solar energy and use it as a heat source for heating, etc. The system is drawing attention.

[0003] There is also known a solar energy converter in which a solar cell module and a heat collecting panel are configured in a hybrid manner so that sunlight can be effectively used from both light energy and heat energy. For example, Japanese Patent Publication No. 4-69438 (hereinafter referred to as a first prior art) discloses that a glass substrate, a transparent electrode, an α-silicon film, an aluminum electrode, an insulating adhesive layer,
A solar energy converter in which metal heat collecting panels are stacked in this order has been proposed. In this solar energy converter, the transparent electrode, the α-silicon film, and the aluminum electrode constitute a solar cell.

Further, Japanese Utility Model Laid-Open No. 4-125163 (hereinafter referred to as a second prior art) discloses a solar cell and an insulator connected to each other by a tempered glass, an adhesive layer, a lead wire from the sun surface side. The adhesive layer also serving as a metal heat collecting panel is laminated in this order, and a concave portion is formed at a position of the heat collecting panel facing a lead wire mounting portion for connecting a solar cell composed of a transparent electrode, an amorphous silicon film, and an aluminum electrode. A formed solar energy converter is disclosed.

Japanese Patent Publication No. 63-45026 (hereinafter referred to as a third prior art) discloses a collector electrode, a surface electrode, an amorphous silicon layer, an aluminum-made layer formed by vapor deposition from the sun surface side. A solar energy converter in which a back electrode, an alumite insulating layer formed on the surface, and a heat collecting part made of aluminum having the alumite insulating layer are stacked in this order is described. This solar energy converter forms an alumite insulating layer on the surface of a heat collecting panel of an extruded aluminum plate by anodic oxidation, and attaches a back electrode made of aluminum by vapor deposition on the alumite insulating layer. An amorphous silicon layer to be used as a solar cell is attached by glow discharge method, and a transparent surface electrode made of indium oxide and tin oxide is formed thereon. It is formed and manufactured.

[0006]

The first to third prior arts have the following problems. That is, in the first prior art, between the lead wire connecting the solar cells and the metal heat collecting panel,
An insulating adhesive layer is provided to ensure electrical insulation between the lead wires and the heat collecting panel. However, when the solar battery cells and the like and the heat collecting panel are bonded with the insulating adhesive layer, the insulating adhesive layer once becomes gel-like and flows, then hardens, and the two adhere firmly. Since the thickness becomes uneven when flowing, it is difficult to control the thickness of the adhesive layer after the bonding step. Therefore, in a place where the adhesive layer is thin, there is a possibility that the lead wire connecting between the solar cells and the metal heat collecting panel come into contact with each other to cause a short circuit or a short circuit, thereby impairing the power generation function of the solar cell. . If the adhesive layer between the lead wire and the heat collecting panel is made sufficiently thick, such inconvenience can be avoided, but on the other hand, the heat conduction from the solar cell to the heat collecting panel is reduced, and the heat collecting effect is deteriorated. The problem occurs.

As in the third prior art, a thin-film solar cell of amorphous silicon is formed by depositing aluminum on an alumite insulating layer to form a back electrode and attaching the back electrode by a glow discharge method. In the case of, the adhesive layer is not used, so there is no danger of short-circuiting or short-circuit due to the loss of the adhesive layer.However, since the alumite layer is used as the electrical insulating layer, There is a problem that it is limited to aluminum.There is a problem of forming an alumite insulating layer by anodic oxidation, attaching a back electrode by vapor deposition, attaching an amorphous silicon layer by glow discharge, and vapor-depositing aluminum as a mask. Therefore, many extremely complicated processes requiring advanced technology are required, and the manufacturing method is also complicated. Therefore, the solar energy converter produced by this method is expensive. In addition, this method employs a method of depositing amorphous silicon by vapor deposition as a solar cell, so that a crystalline solar cell with high light-to-electricity conversion efficiency that cannot be formed by vapor deposition is provided. There is a problem that a solar energy converter cannot be manufactured.

As a means for solving this problem, it is conceivable to bond a crystalline solar cell and an aluminum heat collecting panel having an alumite insulating layer formed on the surface thereof with an adhesive layer. When the crystalline solar cell is bonded to the aluminum heat collecting panel with the adhesive layer formed thereon, the same problem as in the first related art occurs. That is, a crystalline solar cell requires a lead wire for connecting the solar cell, and the lead wire protrudes from the lower surface to form irregularities. Therefore, when the adhesive layer layer is thinned, the adhesive layer is displaced when bonding under pressure, and a convex portion formed on the lower surface directly damages the thin alumite insulating layer, which may cause a short circuit or a short circuit. When the thickness of the adhesive layer is increased, heat conduction from the solar cell to the heat collecting panel is reduced, and the heat collecting effect is deteriorated.

In the second prior art, similarly to the first prior art, an insulating adhesive layer is provided between the lead wire and the heat collecting panel, and the insulating adhesive layer is provided between the lead wire and the heat collecting panel. Electrical insulation is secured. Then, in order to avoid the problem of the first prior art, a concave portion is formed in a portion of the heat collecting panel facing the lead wire mounting portion of the solar cell, and an adhesive between the lead wire and the heat collecting panel is formed. The thickness of the layer is increased to prevent short circuit and electric leakage, and the adhesive layer in other parts is thinned to improve the heat collecting effect. However, in this configuration, since concave processing of the heat collecting panel is required, processing cost is high, and a solar cell connected with lead wires and a heat collecting panel are bonded together with an adhesive layer. Since the adhesive layer becomes gel-like and flows, the concave portion of the heat collecting panel and the lead wire are displaced, and the lead wire touches the edge of the concave portion, causing dielectric breakdown and impairing the power generation function of the solar cell. There is.

The present invention has been made in view of the above circumstances, and does not increase the cost nor sacrifice the efficiency of collecting solar heat, and provides an electric connection between the solar cell and the heat collecting panel. It is an object of the present invention to provide a solar energy converter capable of improving insulation reliability.

[0011]

According to a first aspect of the present invention, there is provided a solar energy converter having a laminated structure of a solar cell module and a heat collecting panel. Is provided with an insulating layer made of a synthetic resin paint having a thickness of 30 μm or more on the surface, the solar cell module and the heat collecting panel are polymerized with the surface facing the solar cell module, and are integrated with an adhesive. Is what is being done.

In the first aspect of the present invention, the thickness of the insulating layer may be arbitrarily determined because it is determined by a required withstand voltage or the like. However, in consideration of AC100V for home use, the required power generation of the solar cell module is 100V. As described above, when the withstand voltage is set, the lower limit of the thickness of the insulating layer is 30 μm. Furthermore, since the required power generation capacity of the solar cell module is generally 200 V, the lower limit of the thickness of the insulating layer is preferably set to 35 μm. Further, the upper limit of the thickness of the insulating layer is sufficient to be 150 μm or less in consideration of the maximum voltage of 600 V of the solar cell module according to the JIS standard. Further, the thickness is preferably 130 μm or less in consideration of cost, heat collection efficiency, and the like.

[0013] In the invention according to claim 1,
The solar cell module has a transparent surface protection plate, an adhesive layer,
The solar cell and the adhesive layer are polymerized in this order. The number of solar cells may be plural or one connected by lead wires. The solar cell may be either a crystalline solar cell or an amorphous solar cell.

In the first aspect of the present invention, the insulating layer is preferably formed of a glossy synthetic resin paint. Since the glossy paint has a smooth surface and fewer pinhole defects than the matte paint, the reliability of the electrical insulation is improved.

The insulating layer is preferably formed by coating with a synthetic resin powder coating. Among the synthetic resin paints, the powder paint can use a synthetic resin having a high molecular weight, so that pinhole defects can be reduced and the reliability of electric insulation is improved.

According to a second aspect of the present invention, in the solar energy converter of the first aspect, the insulating layer is formed of a synthetic resin paint made of an epoxy resin composition or a polyester resin composition. .

According to a third aspect of the present invention, there is provided a method of manufacturing a solar energy converter, which is manufactured by polymerizing a solar cell module and a heat collecting panel, wherein the surface of the heat collecting panel is coated with a synthetic resin paint. An insulating layer having a thickness of 30 μm or more is formed, and the surface is directed toward the solar cell module, and the solar cell module and the heat collecting panel are polymerized and integrated with an adhesive.

In the third aspect of the present invention, it is preferable that the surface of the heat collecting panel is coated by electrostatic coating. Then
Coating of a uniform film thickness is possible, defects such as pinholes are reduced, and reliability of electric insulation is improved.

Further, in the invention according to claim 3,
The surface of the heat collecting panel is preferably coated by electrodeposition coating. By coating by electrodeposition coating, it is possible to apply even a deformed shape such as a concave portion, so that it is possible to cope with a heat collecting panel having a complicated shape provided with a wiring groove or the like.

According to a fourth aspect of the present invention, in the method for manufacturing a solar energy converter according to the third aspect, the synthetic resin paint is made of an epoxy resin composition or a polyester resin composition.

The fifth aspect of the present invention provides the first or second aspect.
A building to which the solar energy converter according to the above is attached.

The invention according to claim 6 is the first or second invention.
A roof panel incorporating the solar energy converter according to the above.

[0023]

According to the first aspect of the present invention, an insulating layer made of a synthetic resin paint having a thickness of 30 μm or more is provided on the surface of the heat collecting panel, and the heat collecting panel is collected with the solar cell module with the surface facing the solar cell module. Since the thermal panel is polymerized and bonded together with an adhesive, when the solar cell etc. and the heat collecting panel are bonded with the adhesive layer, the adhesive layer temporarily becomes gel-like, flows and becomes adhesive. Even if a thin layer is formed in the layer, there is a relatively thick insulating layer of 30 μm in thickness made of an electrically insulating material on the surface of the heat collecting panel, and an electrode or a lead wire connecting between the solar cells and a metal There is no direct contact with the heat collecting panel.

At this time, since the insulating layer is not as thin as the alumite layer, even if irregularities due to lead wires for connecting a crystalline solar cell are present on the lower surface of the solar cell, the insulating layer can be formed by the irregularities. It is not destroyed. Therefore, this insulating layer has high reliability. Thus, even if the adhesive layer becomes thin, there is no risk of short circuit or electric leakage. Therefore, the adhesive layer can be made thin, and the heat collecting effect of the heat collecting panel can be improved. In addition, the insulating layer made of an electrical insulating material provided on the surface of the heat collecting panel expands the range of material selection of the heat collecting panel because the heat collecting panel is not limited to aluminum as in the conventional alumite insulating layer. be able to.

According to the second aspect of the present invention, since the insulating layer is formed of a synthetic resin paint made of an epoxy resin composition or a polyester resin composition, the insulating layer has high electrical insulation. I have. Therefore, a predetermined withstand voltage can be ensured even if the coating film is thinned, and the material cost is reduced and the heat collecting performance is improved. In addition, since the synthetic resin paint composed of an epoxy resin composition or a polyester resin composition has high hardness, even if unevenness due to lead wires for connecting a crystalline solar cell or the like is present on the lower surface of the solar cell, the painted surface is not sufficiently coated. It is hard to be damaged and has high reliability of electrical insulation. Further, since thick coating is possible, it is possible to cope with a case where a high dielectric strength voltage is required.

According to a third aspect of the present invention, the surface of the heat collecting panel is coated with a synthetic resin paint to form an insulating layer having a thickness of 30 μm or more. Since the heat panel and the heat panel are polymerized and integrated with an adhesive, they have substantially the same function as the first aspect of the present invention. That is, when the solar cell and the like and the heat collecting panel are bonded with the adhesive layer, the coating film is used for the electrical insulating layer.
There is no direct contact between the electrode or lead wire connecting the solar cells and the metal heat collecting panel, and therefore,
There is no risk of short circuit or short circuit, and the power generation function of the solar cell is not impaired. Further, since a coating film having a thickness of 30 μm or more is formed, the painted surface is not as thin as an alumite layer, and the reliability of the electrical insulation is high.

Since the reliability of the insulating layer is high, the thickness of the adhesive layer can be reduced, and the heat collecting effect of the heat collecting panel can be improved. Also, since the insulating layer is provided by painting with a synthetic resin paint, the insulating layer can be provided on any metal heat collecting panel, and the insulating layer is formed by a general method of painting, so it is extremely inexpensive. Can be manufactured.

According to a fourth aspect of the present invention, the synthetic resin paint is
Since it is made of an epoxy-based resin composition or a polyester-based resin composition, it has the same effect as the second aspect of the present invention.

The invention described in claim 5 is the invention according to claim 1 or 2
Since the building is provided with the solar energy converter described above, if the generated electricity and heat are transferred into the building, the building can be efficiently used through a short transfer path.

The invention according to claim 6 is the invention according to claim 1 or 2
Since the roof panel incorporates the described solar energy converter, most of the piping and wiring work can be performed on the ground in advance, and construction is easy.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. FIG. 1 is an exploded perspective view showing the configuration of a solar energy converter according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view partially showing the configuration of the solar energy converter. Solar energy converter M of this example
Has a laminated structure of a solar cell module 1 and a heat collecting plate panel 2, as shown in FIG. The solar cell module 1 is made of a translucent glass 11 of tempered glass, EVA
An adhesive layer 12 of (ethylene-vinyl acetate copolymer), a plurality of crystalline solar cells 13 connected by lead wires 131, and an adhesive layer 14 of EVA are polymerized in this order.

The heat collecting panel 2 is a copper plate having good thermal conductivity, in which a copper water pipe 22 is provided, and a heat medium is contained in the water pipe 22. You can pass through. On the surface of the heat collecting panel 2 (copper plate), an insulating layer 21 having a thickness of 30 μm or more, which is coated with an electrically insulating epoxy-based paint, is provided. Therefore, unlike the conventional case where the alumite insulating layer is provided, the heat collecting panel is not limited to aluminum.
Since the insulating layer 21 is provided by a general method of painting, the heat collecting panel 2 can be manufactured at extremely low cost.

The solar energy converter M is shown in FIG.
As shown in (1), the solar cell module 1 and the heat collecting panel 2 are superposed with the surface (the insulating layer 21 side) of the heat collecting panel 2 facing the solar cell module 1, and the solar cell module 1
The two are integrally bonded by an adhesive layer 14 shown below.

Next, a method of manufacturing the solar energy converter M will be described. As shown in FIG.
The solar cell 1 connected to the heat collecting panel 2, the adhesive layer 14, and the lead wire 131 on a lower mold 41 provided with 11
3. The adhesive layer 12 and the translucent glass 11 are polymerized.

Next, as shown in FIG. 4, an upper mold 42 having a pressurizing film 421 from above the light transmitting glass 11 at the top of the polymerization.
And at the same time heat is applied by flowing a current through the heater 411, and at the same time, a fluid such as oil is press-fitted between the pressurizing film 421 and the upper mold 42, and the entirety of the transparent glass 11 is pressed by the pressurizing film 421. Apply pressure. Thereby, the adhesive layers 12 and 14 are melted and the whole is integrally bonded. When the adhesive layers 12 and 14 are melted and integrated as a whole, the compressed air is released and the heater 411 is released.
Then, when the upper mold 42 is moved upward and taken out from the inside after turning off the electricity, a good solar energy converter M as shown in FIG. 5 can be manufactured.

When the adhesive layer 14 melts and the adhesive layer 14 flows and the adhesive layer 14 is partially thinned, the surface of the heat collecting panel 2 is hardened with an epoxy paint. In addition, since the relatively thick insulating layer 21 having a thickness of 30 μm or more is provided, the lead wires 131 connecting the solar cells 13 are formed.
Does not directly contact with the heat collecting panel 2 made of copper.
Further, since the insulating layer 21 is coated to a thickness of 30 μm or more, it is thin like an alumite layer, and even if irregularities due to the lead wires 131 connecting the crystalline solar cells are present on the lower surface of the solar cell 13. In addition, the insulating layer 21 is not broken by the unevenness. Therefore, the insulating layer 21 has high reliability. As described above, even if the thickness of the adhesive layer 14 is reduced, there is no risk of short-circuiting or electric leakage. Therefore, the thickness of the adhesive layer 14 can be reduced, and the heat collecting effect of the heat collecting panel 2 can be improved. .

Further, the relationship between the coating thickness of the epoxy paint for forming the insulating layer 21 and the withstand voltage was examined. When the coating thickness was 30 μm, the withstand voltage was 1.4 kv. Was 40 μm, the withstand voltage was 2.1 kv, and when the coating thickness was 60 μm, the withstand voltage was 2.5 kv. On the other hand, in the case of a general paint, for example, an acrylic resin paint, when the coating thickness is 30 μm, the withstand voltage is 0.9 kv. When the coating thickness is 40 μm, the withstand voltage is 1.4 kv. When the film thickness was 60 μm, the withstand voltage was 1.8 kv. When the film thickness was 80 μm, the withstand voltage was 2.2 kv. When the film thickness was 100 μm, the withstand voltage was 2.6 kv. .

On the other hand, the withstand voltage (kv) required for the solar cell module 1 is a system voltage (kv) × 2 + 1.0 (kv) according to the standards such as JIS. Therefore, if the system voltage is 100 v (0.1 kv),
The withstand voltage (kv) required for the solar cell module 1 is 1.2 kv. Also, when the system voltage is 200V
(0.2 kv), the insulation withstand voltage (kv) required for the solar cell module 1 is 1.4 kv. When the system voltage is 600 v (0.6 kv), the insulation withstand voltage (kv) required for the solar cell module 1 is 2.2 kv.
Becomes

Therefore, in the case of an epoxy-based paint, if the thickness of the coating film is 30 μm or more, it is possible to cope with the insulation withstand voltage of 1.4 kv required for a system voltage of 200 v. Coating thickness 4
When the thickness is 0 μm or more, it is possible to reliably cope with the withstand voltage of 1.4 kv required for the system voltage of 200 v. Further, when the thickness of the coating film is set to 60 μm, the withstand voltage 2.2 required for the maximum voltage of 600 V specified in the extension rules for ordinary houses is 2.2.
kv. On the other hand, in the case of a general acrylic paint, the thickness of the coating film needs to be thicker than that of the epoxy paint in order to secure a necessary dielectric strength voltage. Here, assuming that the system voltage is 100 V to 600 V, the thickness of the coating film is about 40
μm to 100 μm.

As described above, the translucent glass 11, the adhesive layer 12, and the plurality of solar cells 1 connected by leads are constituent elements of the solar cell module 1 in order from the top.
3. The adhesive layer 14 is polymerized, and the heat collecting panel 2 is further polymerized with the surface thereof facing the solar cell module 1 under the adhesive layer 14;
When this is pressed and the translucent glass 11 and the solar cell 13 are bonded together, and the solar cell 13 and the heat collecting panel 2 are simultaneously bonded with the adhesive layers 12 and 14, the entire solar energy is integrated. The converter M can be easily manufactured in one step.

Next, as a method of using the solar energy converter M, a building to which it is attached will be described.
First, as shown in FIGS. 6 and 7, a plurality of solar energy converters M are arranged on the roof 6, and a water pipe 22 is connected to the heat storage tank 7 with a connection pipe 23. 23 is passed through a heating medium comprising ethylene glycol. At this time, the heat collection panel 2 is heated by the radiant heat of the sun, and the heat moves to the heat medium passing through the water pipe 22, and the heat medium passes through the connection pipe 23 and is stored in the heat storage water storage layer 7. Heat the water. Therefore, hot water is stored in the heat storage tank 7.

The hot water stored in the heat storage tank 7 thus drawn out is drawn out from the draw-out pipe 71 and used as hot water for baths, washrooms, kitchens, etc., or as hot water for floor heating. The electricity generated by the solar cell module 1 is used as electricity in a house. As described above, the solar energy converter M can efficiently generate power with the solar cell module 1 and can efficiently use the heat collected by the heat collecting panel 2.

Next, an embodiment of a roof panel incorporating the solar energy converter M will be described with reference to FIG. FIG. 8 is an external view of a roof panel in which the solar energy converter M is incorporated, where P is a roof panel. The roof panel P has a roof panel body P1 having a roof surface plate portion P11 and a flat surface (the roof surface plate portion P11).
Of the solar energy converters M mounted in a row (in the direction orthogonal to the flow direction of the inclined roof surface)
And a plurality of vertical frame members F1 and a plurality of horizontal frame members F3 serving as a mounting base for a plurality of solar cell modules 1 (hereinafter, referred to as both modules) attached to the lower side in two horizontal rows.
And a frame F composed of Although not particularly shown, the roof face plate portion P11 is provided with a waterproof sheet such as asphalt roofing on an upper surface of a base plate (roof base material) such as a structural plywood or a particle board, and further, a vinyl chloride steel sheet is provided on an upper surface of the waterproof sheet. (Polyvinyl chloride metal laminate) and the like, and a non-combustible coating material such as a plywood roof, a slate or a tile is provided as necessary.

The roof panel body P1 includes a roof face plate portion P11.
Has a connecting means (not shown) for connecting to the lower member. The structure on the back side varies depending on the structure of the lower member. When the lower member does not have a roof surface, the roof panel P alone constitutes the roof surface.
It is necessary to have a structure that is sufficiently strong and waterproof. Also,
In the case where the lower member has a roof surface, both the main roof panel P and the lower member may have a structure that is sufficiently strong and waterproof.

A solar energy converter M as shown in FIG.
When obtaining the roof panel P with a mark, the solar energy converter M is fixed on the upper surface of the roof panel P at an assembly factory of the roof panel P. Generally, a plurality of solar energy converters M are required, and a cable connection and a pipe connection between them must be performed. Therefore, these are also performed in a factory in advance. Further, depending on the desired heat collection amount, it is not necessary to use all the modules on the roof panel P as the solar energy converter M. For this reason, in this embodiment, the normal solar cell module 1 is attached except for the required number. For this solar cell module 1, only cable connection is required, and this is also performed at a factory in advance.

The assembling work of the solar energy converter M can be performed in a factory with the roof panel main body P1 placed on the ground or the floor, so that work at a high place can be avoided. Then, by using the roof panel P with the solar energy converter M created as described above as a member constituting the roof surface of the unit house, the solar energy converter M is automatically installed by mounting the roof panel P. Can be installed. In a house to which the roof panel P is attached, for example, by using a solar energy converter M instead of a solar heat collector in a conventional solar water heater, not only power generation by a solar cell but also heat energy is utilized. can do. In addition, by previously connecting cables and pipes at the factory, work on the roof at the construction site can be almost eliminated.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like that do not depart from the gist of the present invention. Is also included in the present invention. For example, the insulating layer 2
Although 1 was formed of an epoxy-based paint, it may be formed of a polyester-based paint. In addition, although the heat collecting panel 2 has the water guide pipe 22 provided in a copper plate body, the heat collector panel 2 may be mounted in a state where the water guide pipe protrudes from one surface of the metal plate as in the first related art. .

In the above-described embodiment, a copper plate is used as the heat collecting panel 2. However, the present invention is not limited to this, and an aluminum plate or another metal plate may be used. In addition, solar cell 1
As the third example, a crystalline silicon solar cell was used. However, the present invention is not limited to this, and an amorphous silicon solar cell or a compound solar cell may be used. Further, as a device for pressurizing, a fluid such as oil is press-fitted between the pressurizing films 421 of the upper mold 42, but the upper mold 42 and the lower mold 41 may directly pressurize.

Further, in the above-described embodiment, a plurality of solar energy converters M are arranged side by side on the roof 6.
The roof may be roofed with a roof panel to which the solar energy converter M is attached in advance. Then, the work such as piping and wiring can be performed on the ground in advance, so that the number of man-hours at the construction site can be reduced and the construction can be facilitated.

[0050]

According to the first aspect of the present invention, since the insulating layer made of a synthetic resin paint having a thickness of 30 μm or more is provided on the surface of the heat collecting panel, the electrodes or leads for connecting the solar cells are provided. There is no direct contact between the wire and the metal heat collecting panel.

Further, since the insulating layer is not as thin as the alumite layer, even if the unevenness due to the lead wires connecting the crystalline solar cells is on the lower surface of the solar cell, the unevenness may damage the insulating layer. Nothing. Therefore, this insulating layer has high reliability. Thus, even if the adhesive layer becomes thin, there is no risk of short circuit or electric leakage. Therefore, the adhesive layer can be made thin, and the heat collecting effect of the heat collecting panel can be improved. In addition, the insulating layer made of an electrical insulating material provided on the surface of the heat collecting panel expands the range of material selection of the heat collecting panel because the heat collecting panel is not limited to aluminum as in the conventional alumite insulating layer. be able to.

According to the second aspect of the present invention, since the insulating layer is formed of a synthetic resin paint composed of an epoxy resin composition or a polyester resin composition, the insulating layer has high electrical insulation. I have. Therefore, a predetermined withstand voltage can be ensured even if the coating film is thinned, and the material cost is reduced and the heat collecting performance is improved. In addition, since the synthetic resin paint composed of an epoxy resin composition or a polyester resin composition has a high hardness, even if unevenness due to lead wires for connecting a crystalline solar cell is present on the lower surface of the solar cell, the painted surface is not. It is hard to be damaged and has high reliability of electrical insulation.

According to a third aspect of the present invention, the surface of the heat collecting panel is coated with a synthetic resin paint to form an insulating layer having a thickness of 30 μm or more. Since the heat panel and the heat panel are polymerized and integrated with an adhesive, the same effects as those of the first aspect of the invention are obtained. That is, when the solar cell or the like and the heat collecting panel are bonded with an adhesive layer, the coating film is used for an electrical insulating layer, and an electrode or a lead wire connecting between the solar cells and a metal heat collecting panel. Are not in direct contact with each other, and therefore there is no danger of short circuit or short circuit, and the power generation function of the solar cell is not impaired. Further, since a coating film having a thickness of 30 μm or more is formed, the painted surface is not as thin as an alumite layer, and the reliability of the electrical insulation is high.

Since the reliability of the insulating layer is high as described above, the thickness of the adhesive layer can be reduced, and the heat collecting effect of the heat collecting panel can be improved. Also, since the insulating layer is provided by painting with a synthetic resin paint, the insulating layer can be provided on any metal heat collecting panel, and the insulating layer is formed by a general method of painting, so it is extremely inexpensive. Can be manufactured.

According to a fourth aspect of the present invention, the synthetic resin paint is
Since it is made of an epoxy-based resin composition or a polyester-based resin composition, it has the same effect as the second aspect of the present invention.

The fifth aspect of the present invention is the first or second aspect.
Since the building is provided with the solar energy converter described above, if the generated electricity and heat are transferred into the building, the building can be efficiently used through a short transfer path.

The invention according to claim 6 is the first or second invention.
Since the roof panel incorporates the described solar energy converter, most of the piping and wiring work can be performed on the ground in advance, and construction is easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a layer configuration of a solar energy converter according to an embodiment of the present invention.

FIG. 2 is a sectional view partially showing a layer configuration of the solar energy converter.

FIG. 3 is a perspective view showing a method of manufacturing the solar energy converter, showing a state in which a solar cell module and a heat collecting panel are superimposed on a lower mold.

FIG. 4 is a cross-sectional view showing a part of a state where the solar cell module and the heat collecting panel are heated and pressed in the same manufacturing method.

FIG. 5 is a cross-sectional view showing a part of a cross section of a completed solar energy converter in the same manufacturing method.

FIG. 6 is an explanatory diagram showing a use state of the solar energy converter.

FIG. 7 is an explanatory diagram showing a connection state of the solar energy converter in the use state.

FIG. 8 is an external view of a roof panel incorporating a solar energy converter.

[Explanation of symbols]

 M Solar energy converter 1 Solar cell module 14 Adhesive layer 2 Heat collecting panel 21 Insulating layer 11 Translucent glass (transparent surface protection plate) P Roof panel

Claims (6)

[Claims] 1. A solar energy converter having a laminated structure of a solar cell module and a heat collecting panel, wherein the heat collecting panel has on its surface an insulating layer made of a synthetic resin paint having a thickness of 30 μm or more. A solar energy converter provided, wherein the solar cell module and the heat collecting panel are polymerized with the surface facing the solar cell module, and are integrated with an adhesive. 2. The solar energy converter according to claim 1, wherein the insulating layer is formed of a synthetic resin paint composed of an epoxy resin composition or a polyester resin composition. 3. A method for manufacturing a solar energy converter, which is manufactured by polymerizing a solar cell module and a heat collecting panel, wherein the surface of the heat collecting panel is coated with a synthetic resin paint and has a thickness of 3 mm.
A method for manufacturing a solar energy converter, comprising forming an insulating layer having a thickness of 0 μm or more, polymerizing a solar cell module and a heat collecting panel with the surface facing the solar cell module, and integrating the solar cell module with an adhesive. 4. The method for producing a solar energy converter according to claim 3, wherein the synthetic resin paint comprises an epoxy resin composition or a polyester resin composition. 5. A building to which the solar energy converter according to claim 1 or 2 is attached. 6. A roof panel into which the solar energy converter according to claim 1 or 2 is incorporated.