JP2742209B2 - Solar power generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell power generator in which solar cells are arranged on the wall of a building.

[0002]

2. Description of the Related Art In recent years, due to global environmental problems, great expectations have been placed on solar cell devices that are installed outdoors to generate photovoltaic power. As a familiar application, a solar cell is installed on the wall of a building, and the power generated by the solar cell is partially used to cover daytime power consumption.

[0003]

When a solar cell is directly mounted on the wall of a building, a transparent material such as glass is disposed on the front surface of the solar cell for surface protection.

Accordingly, when the solar cell receives sunlight, the temperature of the solar cell rises, and even in winter, the surroundings of the solar cell are 50%.
Over ℃. For this reason, there has been a problem that the power generation efficiency of the solar cell is reduced, the output is reduced, and the battery life is shortened.

[0005] In addition, since the room temperature around the solar cell and inside the building rises, there is a problem that the electric power used to operate the air conditioner increases in summer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and prevents a solar cell from being overheated even when sunlight is received on a light-receiving surface of the solar cell. An object is to prevent a decrease in efficiency.

[0007]

According to the present invention, an outer wall is made of a light-transmitting material, a light-receiving surface of a solar cell is opposed to the light-transmitting outer wall, and a space between the solar cell and the light-transmitting outer wall is provided. , And a space is provided between the solar cell and the inner wall to form a ventilation layer, and each ventilation layer serves as an air flow path from below to above.

Further, according to the present invention, when the building has a plurality of floors, the air passage communicates from the lowest floor to the top floor of the building.
Alternatively, the air flow path is variable so as to be independent for each floor, and air taken in from an intake port provided below the lowest floor is exhausted from an exhaust port provided above the top floor, or The air sucked in from the intake port provided in the air flow path on the lower floor is exhausted from the exhaust port provided in the air flow path on the upper floor, and the air exhausted from this exhaust port is further directed inward. It has a configuration that leads.

[0009]

According to the present invention, the air flow path exhausts the air taken in from the intake port through the exhaust port to ventilate the solar cell and its surroundings, so that sunlight is received on the light receiving surface of the solar cell. Even if this is done, the solar cell will not overheat, and the solar cell can continue to generate power with high efficiency.

Further, according to the present invention, since the air exhausted from the exhaust port is guided to the inside, the exhausted warm air can be used as heating.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view of a solar cell power generation device of the present invention, and FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1 and 2, reference numeral 1 denotes a building, which is, for example, a four-story structure. Reference numerals 2, 2, 2... Are windows of the building 1. 3, 3, 3 ... (in FIG. 1,
The hatched portions) are the windows 2, 2,
Are solar cell mounting portions provided on the wall surfaces other than 2. The solar cell mounting portions 3, 3, 3,..., And the inner walls 4, 4, 4. For example, a solar cell 6, formed of single crystal, polycrystal, or amorphous silicon, which generates electricity when receiving sunlight disposed between the transparent outer walls 5, 5, 5,.
, And the solar cells 6, 6, 6,... Are provided such that their light receiving surfaces face the translucent outer walls 5, 5, 5,.

The space between the solar cells 6, 6, 6 ... and the translucent outer walls 5, 5, 5 ... and the space between the solar cells 6, 6, 6 ... and the inner walls 4, 4, 4 ... respectively. Has a ventilation layer 7,7
And each of the ventilation layers 7, 7 is about 10c.
m, and form air passages 8, 8 that extend upward from below the building 1. The air passages 8 communicate with the lowermost floor to the uppermost floor of the building 1.
An intake port 9 is provided below the lowest floor, and an exhaust port 10 is provided above the uppermost floor.

Next, the operation of the solar cell power generator configured as described above will be described.

When there is sunlight, the sunlight passes through the translucent outer walls 5, 5, 5,... And is received by the solar cells 6, 6, 6,. Then, various electric devices in the building 1 are operated by the electric power.

When the solar cells 6, 6, 6,... Receive light for a long time, the temperature of the solar cells 6, 6, 6,. Air taken in from the air inlet 9 on the lowest floor of the building 1 is supplied to the solar cells 6, 6, 6,. That is, air flows from the air inlet 9 on the lowest floor of the building 1 to the ventilation layer 7,
Ascending through the air passages 8, 8 of 7, air is drawn into the entire ventilation layers 7, 7 of the building 1. This air cools the solar cells 6, 6, 6,... And their surroundings. And
The air heated by cooling the solar cells 6, 6, 6, ... and the surroundings by removing heat from the solar cells 6, 6, 6, ... and the surroundings flows upward through the air flow paths 8, 8, and the building 1
Is discharged outside through the exhaust port 10 on the top floor of the car.

As described above, the solar cells 6, 6, 6,... And their surroundings are cooled by the air flowing through the air flow paths 8, 8, so that the solar cells 6, 6, 6,. Can be prevented. The warmed air flowing through the air passages 8, 8 is supplied to the exhaust port 1 on the top floor of the building 1.
Since the air is discharged from 0 to the outside, the ventilation layers 7, 7 do not become hot. Therefore, even when the solar radiation is strong, the solar cells 6, 6, 6,... And their surroundings are prevented from being overheated, and the power generation is continued without lowering the power generation efficiency of the solar cells 6, 6, 6,. Can be.

FIGS. 3 and 4 show another embodiment of the solar cell power generator of the present invention. FIG. 3 is a sectional view, and FIG. 4 is a sectional view of a main part thereof. In this embodiment, the air passages 8, 8 are opened and closed by opening and closing a shielding plate 14 provided on each floor.
The air flow paths 8 and 8 are configured to be changeable so that the air passages communicate from the intake port 9 to the exhaust port 10 or are independent for each floor of the building 1.

As shown in FIG. 4, when the shielding plate 14 is closed, the air passages 8, 8 are made independent for each floor of the building 1.
In the figure, reference numeral 15 denotes a floor material that partitions each floor.

When the air passages 8, 8, 8,... Are made independent for each floor by the shielding plate 14, the solar cells 6, 6, 6,
, And the air passages 8, 7 of the ventilation layers 7, 7 between the inner walls 4, 4, 4,.
The air sucked from the air inlets 13, 13, 13 ... provided at the upper, lower, inner walls 4, 4, 4, ... located upstream of the air flow paths 8, 8, 8, ... are provided. Exhaust port 1 provided
Are exhausted from 2, 12, 12,... That is, the shielding plate 1
By making the air flow paths 8, 8 independent for each floor at 4,
This exhausted air is guided inside the building 1.

By taking the exhaust air from the exhaust ports 12, 12, 12,... Into the room in this way, even if the solar cells 6, 6, 6,. The air taken in through the air inlets 13, 13, 13,... Is supplied to the air passages 8, 8, 8,.
, And is further discharged from the exhaust ports 12, 12, 12,.... As a result, ventilation is performed without overheating the solar cells 6, 6, 6,... And their surroundings, and therefore, power generation by the solar cells can be performed without a decrease in output.

Further, since the exhausted air is guided to the inside of the building 1, the exhausted warm air can be used as heating even in a cold winter season, and used for heating air conditioning in winter. Costs can be saved. Moreover, since this air is heated without burning,
Clean heating can be performed without air contamination.

In a hot season such as summer, the shielding plate 14 is opened. When the shielding plate 14 is open, FIG.
Similarly, the intake port 9 communicates with the exhaust port 10, and the air taken in from the intake port 9 on the lowest floor passes through the air passages 8, 8, 8,. Is discharged.

Thus, in a hot season such as summer,
The shield plate 14 is opened, the warmed air is exhausted from the exhaust port 10, and the exhaust ports 12, 12, 12... Are closed so that the warm air exhausted from the building 1 does not enter.

FIG. 5 is a sectional view showing still another embodiment of the present invention. In this embodiment, for example, a ventilation fan 20 for forced exhaust is provided in an exhaust port 10 provided on a rooftop. Further, a temperature sensor 17 for measuring the temperature of the solar cells 6, 6, 6,... Or the surroundings is disposed in the ventilation layer 7. In this embodiment, the temperature sensor 17 is attached to the back of the solar cell 6.

The shielding plate 14 is opened and closed by a driving device 16 composed of a solenoid, a motor, and the like, and a driving device also composed of a solenoid, a motor, and the like is provided to exhaust ports 12, 12, 12,. The lids 18, 18, 18,... Which are opened and closed by the device 19 are provided.
These devices are controlled by a control device 21 including a microcomputer.

In a hot season such as summer, the controller 21
Operate the driving device 16 to open the shielding plate 14, and to communicate the air flow paths 8, 8, 8... From the intake port 9 to the exhaust port 10. The air heated by cooling the solar cells 6, 6, 6,... And their surroundings is exhausted from the exhaust port 10. Then, the control device 21 operates the drive device 19 so that the exhausted warm air does not enter the building 1, and the exhaust ports 12, 12, 12,.
Close with.

On the other hand, the temperature of the solar cells 6, 6, 6,... Or the surroundings is constantly measured by the temperature sensor 16, and when the temperature exceeds a predetermined temperature, the control device 21 determines that the temperature rise cannot be prevented by natural ventilation. Then, the ventilation fan 20 is driven, and the ventilation layers 7, 7 are forcibly exhausted.
The cooling of 6,6 ... is promoted, and abnormal heating is prevented.

When the room is to be heated by the exhaust air in winter, the control device 21 operates the driving device 16 to close the shielding plate 14. When the temperature inside the ventilation layers 7, 7 is lower than that in the room, the lids 18, 18, 18,.
When the air is opened, the cool air is exhausted.
There is a risk of flowing from 2 ... So temperature sensor 1
The lids 18, 18, 18,... Are closed until the inside of the ventilation layers 7, 7 reaches a predetermined temperature by the controller 7, and when the temperature inside the ventilation layers 7, 7 becomes higher than the predetermined temperature, the control device 21 causes the lids 18, 18, 1 to close.
The drive device 19 is operated so as to open 8. Air that has become warmer than a predetermined temperature is exhausted into the room through the exhaust ports 12, 12, 12,..., And heating is performed. With this configuration, it is possible to prevent the cool air from flowing into the room and perform comfortable heating.

[0029]

According to the present invention, spaces are provided between the solar cell and the translucent outer wall and between the solar cell and the inner wall to form a ventilation layer, and the ventilation layer is directed upward from below. As an air flow path, this air flow path exhausts the air taken in from the intake port through the exhaust port and ventilates the solar cell and its surroundings, so even if sunlight is received on the light receiving surface of the solar cell, Without overheating the solar cell, the solar cell can continue high-efficiency power generation and extend the life of the solar cell.

Further, according to the present invention, the air exhausted from the exhaust port is guided to the inside, so that the exhausted warm air can be used as heating and used for heating air conditioning in winter. Costs can be saved.

[Brief description of the drawings]

FIG. 1 is an external front view of a solar cell power generation device according to the present invention.

FIG. 2 is a sectional view taken along the line AA ′ of FIG.

FIG. 3 is a sectional view showing another embodiment of the solar cell power generation device of the present invention.

FIG. 4 is a sectional view of a main part of FIG. 3;

FIG. 5 is a sectional view showing still another embodiment of the solar cell power generation device of the present invention.

[Description of Signs] 1 Building 4 Inner wall 5 Translucent outer wall 6 Solar cell 7 Vent layer 8 Air flow path 9,13 Intake port 10,13 Exhaust port 14 Shield plate

Claims (2)

(57) [Claims] 1. A solar cell power generator in which solar cells are arranged in a space between an outer wall and an inner wall of a building having a plurality of floors,
The outer wall is formed of a translucent material, and the light receiving surface of the solar cell is opposed to the translucent outer wall, and between the solar cell and the translucent outer wall, and between the solar cell and the inner wall. A space is provided in each of the spaces to form a ventilation layer, and each ventilation layer is used as an air flow path from below to above, and this air flow path communicates from the lowest floor to the top floor of the building. A solar cell power generator, wherein air taken in from an intake port provided on a lower side of a lower floor is exhausted from an exhaust port provided on an upper side of a top floor. 2. An air flow path changing means for communicating the air flow path from the lowest floor to the top floor of the building or changing the air flow path independently for each floor, wherein the air flow path changing means provides an air inlet. The solar cell power generation device according to claim 1, wherein the exhaust of the air taken in from the air is switched between an exhaust from an exhaust port provided on an upper side of a top floor and an exhaust to the inside of a building.