JPH0429577Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a solar power generation device, which is capable of efficiently tracking sunlight by receiving only direct sunlight. be.

[Prior art and its problems]

As a means of tracking sunlight, the applicant installs two solar cells with their light-receiving surfaces facing in different directions, and determines the position of the sun based on the difference in the amount of light received when sunlight enters the solar cells. It has already been proposed to detect this and use it as an input signal for a separately installed movable means for moving solar panels for power generation. (Patent Application No. 60-63340) The contents are shown in Figure 3.

The sunlight tracking device shown in Fig. 3 has a motor 3 and a pair of screws 4 mounted on the east and west positions of a rotary mount 2 that floats on water and rotates around a rotation axis 1, and solar cells arranged with their light-receiving surfaces facing each other. The screw 4 is actuated by the outputs of the arrays 5 and 6 to rotate the mount 2 so as to track sunlight, thereby improving the light collection efficiency of the solar cell array 7 installed on the mount 2. It is something.

However, in the case of such a device, since the solar cell arrays 5 and 6 are open, they receive not only direct sunlight but also indirect light, which makes it impossible to accurately detect the position of sunlight, resulting in a difference in output between the solar cell arrays 5 and 6. This has caused problems such as the rotation of the pedestal 2 being controlled.

The purpose of the present invention is to solve the above problems and provide a means for accurately tracking sunlight.

[Means for solving problems]

In order to solve the above problems, the present invention provides a rotatable solar cell mount with a solar panel mounted on the surface and a rotation axis in the north-south direction. A solar cell was installed and the solar cell was surrounded by a reflecting mirror to constitute a sunlight detecting means, and the detecting means rotated the mount to track sunlight.

[Effect]

Since the solar power generation device of the present invention is configured as described above, only direct sunlight is incident on the solar cells constituting the sunlight detection means through the enclosed reflector, and accurate Solar tracking becomes possible.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a solar power generation device as an embodiment of the present invention, and FIG. 2 is an explanatory diagram for explaining the operation of the present invention.

Reference numeral 11 denotes a solar power generation device of the present invention, in which a mount 13 on which a solar panel 12 is mounted can be rotated in the direction of the arrow by rotating its rotation shaft 14 with a motor 15. It is attached. 16 is a bearing. At this time, the rotation axis 14
The axis direction is north-south, and it is placed at an angle from the ground depending on the latitude of the land.

The rotating shaft 14 and the mount 13 are installed in this way, and the mount 13 is rotated about the rotating shaft 14 by the drive of the motor 5, so that sunlight and the solar panel 12 can be connected to each other.
Efficient solar power generation can be achieved by controlling the rotation so that the light-receiving surface is perpendicular.

Reference numerals 17 and 18 denote solar cells attached to both sides of the pedestal 13, whose light-receiving surfaces are oriented in the east-west direction, and reflectors 19 and 20 are surrounded to cover the light-receiving surfaces. Note that the solar cells 17 and 18 are equipped with reflective mirrors 19,
The motor 15 collects sunlight through the motor 20 and generates an electromotive force, and compares the difference between the two electromotive forces.
A control circuit device (not shown) that controls forward and reverse rotation of the
are installed, and these solar cells 17, 1
The eight reflecting mirrors 19 and 20 constitute a sunlight detecting means.

Next, the operation of the solar power generation device of the present invention will be explained with reference to FIG.

FIG. 2 is a view of the device shown in FIG. 1 from the south, and the solar power generation device 11 rotates about the rotation shaft 14 while tracking the position of the sun S. That is, when the sun S is directly above _S1 , the pedestal 13 is in a horizontal state, and the direct sunlight is incident on the solar cell panel 12, and the solar cell 17, which constitutes the sunlight detection means,
The reflecting mirror 18 receives sunlight through the reflecting mirrors 19 and 20, and since there is no difference between the outputs of the solar cells 17 and 18, the single rotation shaft 14 of the pedestal 13 does not rotate. However, when the sun moves from S ₂ to S ₃ , solar cell 1
Since the incident light on solar cell 7 is less than the incident light on solar cell 18, the control circuit detects the difference in output and operates to rotate mount 13 in the direction of arrow A, so that the output of both solar cells 17 and 18 is approximately equal to Control is performed so that they are equal, that is, the light-receiving surface of the solar panel 12 is perpendicular to the solar positions S ₂ and S ₂ .

On the other hand, when the sun S is at positions S ₄ and S ₅ , the pedestal 13 is rotated in the direction B for the same reason as described above.

In addition, since the sun S moves from east to west, the mount 13 moves from S ₄ → S ₅ → S ₁ → S ₂ → S ₃ , and the next day at sunrise, it rotates in the direction B and repeats the same operation. Repeat.

At this time, the solar cell 1 which is the sunlight detection means
The solar cells 17 and 18 are surrounded by the reflectors 19 and 20, and since there is no indirect light, only direct sunlight is received, so sunlight detection is accurate. can be done.

In addition, reflecting mirrors 19, 20 and solar cells 17, 18
The shorter the interval between light receptions, the more accurate the detection will be.

In particular, in the present invention, when the sun S is at a position such as S ₃ or S ₄ , direct sunlight enters only one solar cell, so more effective tracking can be performed.

[Effect of idea]

As described above, according to the present invention, the sunlight detection means is composed of a solar cell and a reflecting mirror, and the incident light to the solar cell is guided through the reflecting mirror, so that it is not affected by indirect light. Since only direct sunlight is detected, unstable output differences do not occur, and sunlight can be accurately tracked, making it possible to provide an efficient solar power generation device.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a solar power generation device that is an embodiment of the present invention, Fig. 2 is an explanatory diagram for explaining the operation of the present invention, and Fig. 3 is a solar tracking device showing the prior art. FIG. 11... Solar power generation device, 13... Frame, 1
7,18...Solar cell, 19,20...Reflector.

Claims (1)

[Scope of utility model registration request] A rotatable solar cell mount with a solar panel mounted on its surface and a rotation axis in the north-south direction is provided, and solar cells are installed on both sides of the mount so that the light-receiving surfaces are in the east-west direction. A solar power generation device characterized in that a battery is surrounded by a reflecting mirror to constitute sunlight detection means, and the detection means rotates the mount to track sunlight.