JP2001090296A - Solar-ray generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lengthen a lifetime by cooling an inverter. SOLUTION: In the solar-ray generating device, solar cells 3 are installed to the roof 2 of a house H while DC electricity obtained from the solar cells 3 is utilized by a conversion into AC electricity by an inverter 4. At least the inverter 4 is disposed to an attic-space ventilating path, by which an attic space 5 is ventilated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power generator useful for extending the life of an inverter.

[0002]

2. Description of the Related Art As shown in FIG. 6, for example, a conventional photovoltaic power generation apparatus has a solar cell a installed on a roof b, and a photovoltaic power generation apparatus installed indoors and, for example, in a distribution board c. A device in which an inverter d is disposed in the vicinity is known. Then, the DC electricity from the solar cell a is converted into AC electricity by the inverter d via the relay terminal box f, and is supplied via the distribution board c. Thus, the generated power is configured to be used for the load i together with the power supplied from the power company. Note that the symbol g is
A wattmeter for measuring the demanded power, and a reference symbol h indicates a surplus wattmeter when the surplus power generated by the power generation flows backward to the power company.

[0003] Incidentally, the inverter d has a problem that heat is easily generated due to DC-AC conversion by periodically conducting a switching element or the like, and its life is short due to damage due to the heat. Further, in the conventional solar power generation device, the inverter d is a solar cell a disposed on the roof b.
Since a relatively large generator corresponding to the total amount of power generation is used, a large installation area is required, and there are problems such as sacrificing indoor space.

The present invention has been devised in view of the above-described problems, and is based on the fact that an inverter is arranged in a vaulted ventilation path for ventilating the back of a hut. It is an object of the present invention to provide a photovoltaic power generator in which an inverter can be installed without squeezing a living space of a house.

[0005]

According to the first aspect of the present invention, a solar cell is provided on a roof of a house,
A photovoltaic power generation device that converts DC electricity obtained from this solar cell into AC electricity by an inverter and uses the electricity, wherein at least the inverter is disposed in a vehicular ventilation path that ventilates the vault. I have.

According to a second aspect of the present invention, the attic ventilation path is formed between an intake port through which air can be introduced into the attic and an exhaust port through which air at the attic can be exhausted, and the ventilation is provided. The photovoltaic power generation device according to claim 1, further comprising a fan for promoting the power generation, and arranging the inverter near one of the intake port and the exhaust port.

According to a third aspect of the present invention, the roof comprises:
The solar cells are arranged on the top surface of the flat plate of the flat roof panel base having the base plate arranged in the framework, and the inverter is arranged in the ventilation path of the back of the hut formed on the bottom surface of the base plate facing the back of the hut. The photovoltaic power generator according to claim 1 or 2, wherein:

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a house H as an embodiment of the present invention. In the figure, a photovoltaic power generator 1 of the present embodiment includes a solar cell 3 provided on a roof 2 of a house H, converts DC electricity obtained from the solar cell 3 into AC electricity by an inverter 4, and converts the AC electricity into AC electricity. The electric power is used for the load i of the house.

In the present embodiment, the roof 2 is exemplified by a gabled roof. As shown in FIG. 1, a solar cell 3 is provided only on one surface A of the roof 2 and a general surface is provided on the other surface B. Shows that the roofing material is installed. The one surface A of the roof 2 exemplarily includes a roof panel P for power generation, as shown in FIGS. 2 and 3.

The roof panel P for power generation includes, for example, a flat roof panel base 10 in which a base plate 9 is disposed on one side of a frame 7 using a frame material, and the roof panel P disposed on an upper surface of the base plate 9. In this example, the solar cell 3 forms a roof material. And one surface A of the roof 2
In this example, the example shown is constituted by using three roof panels P for power generation. However, the number and shape of the power generation roof panels P constituting the roof 2 are not limited to those illustrated but may be variously changed.

The solar cell 3 includes a solar cell S (FIG. 5).
Is defined as a minimum unit, and a plurality of these units are connected to each other. In this example, a total of twelve solar cell modules M, which are unitized by arranging the plurality of solar cells S in a substantially rectangular shape, are arranged on the roof panel base 10. In addition, as shown in FIGS. 4 and 5, the solar cell module M has a substantially rectangular plate-like portion 12 in this example.
A, and a pair of support portions 12B that grip both opposing edges and are fixed to the base plate 9.

As shown in FIG. 5, a cross section of the plate-like portion 12A is provided on a base 13 having a plate-like shape through a spacer 15 which also serves as a seal made of butyl rubber or the like. It is composed by sticking together. Also, the transparent plate 14
A plurality of solar cells S are fixed to the lower surface of the substrate by, for example, vapor deposition or the like. Note that an air layer is interposed between the solar cell S and the base 13. On the lower surface of the base 13, a terminal box 17 made of resin or the like fixed via a mounting bracket 19 is provided. The terminal box 17 has a terminal or a lead wire 20 (shown in FIGS. 3 and 4) extending from the terminal, and can be used, for example, when connecting a plurality of solar cell modules M.

As shown in FIG. 3, the power generation roof panel P has a main cable 24 disposed on the upper surface of the field board 9 and the main cable 24 corresponds to each of the solar cell modules M. A relay box 25 for wiring is provided.
Then, the support portion 13 of the solar cell module M is fixed to the upper surface of the base plate 9 using a screw, a nail, or the like, and the terminal box 17 of each solar cell module M and the relay box 25 are connected with the lead wire 22. Make wiring connections. Thereby, a solar cell 3 in which twelve solar cell modules M are connected can be configured. At this time, it is preferable to provide a connector 22 or the like at the end of the lead wire 20 to facilitate wiring.

In the present embodiment, the main cable 24 extends to the lower surface of the base plate 9 through an opening 27 provided at one end of the base plate 9 and is fixed to the lower surface of the base plate 9 in this embodiment. For example, it is connected to an inverter 4 housed in a case body U with heat radiation fins. As described above, when the roof panel P for power generation is used, the solar cell 3, the inverter 4, and the like can be incorporated as a roof panel into a unit, so that various constructions and wiring can be performed in a factory or the like in advance. This is preferable because installation work at the site can be further simplified. In addition, each power generation roof panel P is provided with an inverter 4 corresponding to the solar cell 3 of each panel, so that the size of each inverter 4 can be reduced in weight and size as compared with the related art. For example, it becomes easy to mount the device in a panel, and it is possible to suppress a rise in temperature. In addition, the case body U may be provided with a system link protection device for protecting the system in the event of an accident, for example, in addition to the inverter 4.

In the present embodiment, the roof 2 is constructed using the above-described roof panel P for power generation, and as shown in FIG. Is provided in the attic ventilation path 6 for ventilation. In this way, by arranging the inverter 4 that easily generates heat in the ventilation path 6 where air flows when air flows through the hut 5, the inverter 4 is cooled by effectively using the flow of the ventilation air. Thus, thermal damage to the switching element and the like can be reduced, and the life of the inverter can be prolonged. In addition, by arranging the inverter 4 on the back of the hut 5, it is possible to effectively use the space behind the hut,
It can also prevent the living space of the house from being squeezed.

In the present embodiment, the attic ventilation path 6 is formed, for example, between an intake port I through which air can be introduced into the attic 5 and an exhaust port O through which air from the attic 5 can be discharged. In this example, a fan equipped with a fan F for promoting ventilation is exemplified. The intake port I is formed, for example, as a small gap between the eaves 29 of the roof 2 and the outer wall W. The intake port I is formed, for example, continuously over the ridge direction. The exhaust port O is
In this example, a ventilation chimney 30 is provided in the ridge of the roof 2 and is formed as a ventilation port 31 provided with a grill.

In the present embodiment, the ventilation chimney 30 is provided with a ventilation box 30A fixed to the ridge portion and a box-shaped cover provided on two opposite sides with the ventilation port 31 through which air can pass, and covering the ventilation box 30A. And a body 30B. Further, the ventilation box 30A has a tubular portion 32 extending between the facing ventilation ports 31, and has an opening 33 on the upper surface thereof. In the present embodiment,
An example in which the fan F is arranged in the ventilation box 30A is illustrated. Therefore, the attic ventilation path 6 of this example is
It is formed so as to extend from the intake port I to the ventilation port 31 along the lower surface of the roof plate 9 of the roof panel P for power generation and through the ventilation box 30A. By driving the fan F, the flow velocity of the air flowing through the attic ventilation path is increased, the ventilation efficiency is further improved, and the cooling effect of the inverter 4 is further enhanced, which contributes to extending the life.

The cooling effect can be further enhanced by arranging the case body U containing the inverter 4 close to one of the intake port I and the exhaust port O. An example in which the temperature is at the back of the cabin 5 is often higher than the outside air temperature is preferable, but the roof panel PL, PR (or FIG. 2 (shown by a dashed line) is particularly desirable. In addition, when the temperature of the surrounding air is increased by the heat of the inverter 4, an ascending airflow is generated in the back of the cabin 5, which is useful for promoting the exhaust efficiency.

[0019]

As described above, according to the first aspect of the present invention, by arranging the inverter in the attic ventilation path for ventilating the attic, the inverter can be cooled by the flow of air accompanying ventilation. Thereby, destruction of the element due to the heat of the inverter can be suppressed for a long period of time, and the life can be extended. In addition, by arranging the inverter in the back of the hut, the space in the back of the hut can be effectively used, and the living space of the house can be prevented from being compressed.

According to a second aspect of the present invention, the attic ventilation path is formed between an intake port through which air can be introduced into the attic and an exhaust port through which air can be exhausted from the attic. By providing a fan that promotes the ventilation, ventilation is further promoted, and the cooling effect of the inverter is further enhanced, which contributes to extending the life. By arranging the inverter close to one of the intake port and the exhaust port, the cooling effect can be further enhanced.

Further, in the invention according to claim 3, the roof has a flat roof panel base having a frame provided with a base plate, wherein the solar cells are disposed on the base plate upper surface and the base plate lower surface facing the back of the hut. Since the inverter is disposed in the attic ventilation path formed in the solar cell, a solar cell, an inverter and the like can be incorporated as a roof panel to form a unit,
Various wirings and the like can be performed in a factory or the like in advance, and the installation work at the construction site can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view of a house showing an embodiment of the present invention.

FIG. 2 is a sectional view of the roof portion.

FIG. 3 is a perspective view illustrating a roof panel for power generation.

FIG. 4 is a front view thereof.

FIG. 5 is a partial cross-sectional view illustrating a solar cell module.

FIG. 6 is a perspective view illustrating a conventional solar power generation device.

[Explanation of symbols]

 H house 1 solar power generation device 2 roof 3 solar cell 4 inverter 5 box

Claims (3)

[Claims] 1. A solar cell is provided on a roof of a house,
A photovoltaic power generation device that converts DC electricity obtained from this solar cell into AC electricity by an inverter and uses the converted electricity, wherein at least the inverter is disposed in a vehicular ventilation path that ventilates a vault. Solar power generator. 2. The attic ventilation path includes a fan formed between an air inlet through which air can be introduced into the attic and an exhaust port through which air from the attic can be exhausted, and promoting the ventilation. 2. The photovoltaic power generator according to claim 1, wherein the inverter is arranged near one of the intake port and the exhaust port. 3. The ventilation system according to claim 3, wherein the roof is provided with a solar panel disposed on an upper surface of a flat roof panel base having a frame plate on which a solar panel is arranged and formed on a lower surface of the roof panel facing the back of the hut. The photovoltaic power generator according to claim 1 or 2, wherein the inverter is arranged in a path.