JP2015181324A - Sunlight tracking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tracking device that can make large a negative elevation angle of a panel receiving or converging sunlight and can efficiently remove fugitive dust deposited on a light reception plane or light convergence plane of the panel.SOLUTION: A sunlight tracking device includes a column 2, a panel 1 supported by the column 2, and receiving or converging sunlight, and a drive device 4 which drives the panel 1 so as to track at least one of the altitude or azimuth angle of the sun. The panel 1 has an opening part 3 that the column 2 can pass through. When the panel 1 faces the ground surface, the column 2 passes through the opening part 3.

Description

  The present invention relates to a solar light tracking device used in a solar power generation system or a solar thermal power generation system.

  A solar power generation system directly converts solar energy into electricity using a solar cell panel. As fossil fuels such as oil and coal are depleted, the use of inexhaustible energy such as sunlight is utilized, and the use of solar power generation systems is expected to increase year after year. On the other hand, a solar thermal power generation system condenses sunlight with a condensing panel such as a lens or a reflecting mirror and uses it as a heat source for steam power generation or a Stirling engine. Like solar power generation systems, solar power generation is expected to increase year by year because solar power is an energy source.

  The sun moves from east to west with changing altitude and azimuth. 2. Description of the Related Art A solar light tracking device is known in which a light receiving surface of a solar cell panel is tilted about two axes according to the altitude and azimuth of the sun so that the light receiving surface of the solar cell panel is perpendicular to sunlight. This is because the power generation efficiency is highest when the light receiving surface of the solar cell panel is perpendicular to sunlight. In the morning, this solar tracking device turns the solar panel's light-receiving surface toward the east according to the sun rising from the east, and at noon the solar panel's light-receiving surface faces the south in the evening. Then, the light-receiving surface of the solar panel is turned to the west according to the sun setting in the west. At the same time, the solar panel is tilted according to the altitude of the sun. On the other hand, in a solar thermal power generation system, the condensing panel is tracked by the sun instead of the solar cell panel.

  By the way, if a solar power generation system is introduced in a desert area with a large amount of sunlight, a large amount of power generation can be obtained. However, when a solar power generation system is introduced in a desert area, dust is swept in the wind and accumulates on the light receiving surface of the solar cell panel, resulting in a decrease in power generation. For this reason, cleaning of dust accumulated on the light receiving surface is an important issue. Since the solar power generation system is used outdoors where earth and sand, powder, and the like are scattered, the solar power generation system installed outside the desert region has a similar problem.

  In order to solve this problem, Patent Document 1 discloses a solar cell panel in which the drive device has an elevation angle of 0 ° or less in the normal direction of the solar cell panel when the amount of power generation is lower than the amount of sunlight. An invention has been proposed in which sand is removed from the light receiving surface of a solar cell panel.

JP 2008-21683 A

  However, in the solar light tracking device described in Patent Document 1, since the solar cell panel is rotatably provided at the upper end portion of the support column, there is a problem that the negative elevation angle of the inclined solar cell panel is limited. There is. This is because the solar panel hits the column. In the solar light tracking device described in Patent Document 1, the negative elevation angle of the solar cell panel can be taken only up to about −15 degrees, and dust cannot be efficiently dropped.

  Therefore, the present invention provides a tracking device that can increase the negative elevation angle of a panel that receives or collects sunlight, and can efficiently remove dust accumulated on the light receiving or collecting surface of the panel. For the purpose.

  In order to solve the above problems, the present invention is a solar light tracking device that tracks sunlight, a column, a panel that is supported by the column and receives or collects sunlight, and the altitude and direction of the sun. A driving device that drives the panel so as to track at least one of the corners, and the panel is a solar light tracking device having an opening through which the column can pass.

  According to the present invention, when the light-receiving surface or the light-collecting surface of the panel faces the ground, the panel has an opening through which the column can pass, so that the negative elevation angle of the panel can be increased, and the light-receiving surface of the panel can be increased. The dust accumulated on the surface or the light collecting surface can be efficiently dropped.

It is a perspective view of the sunlight tracking apparatus of 1st embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). It is a perspective view of the solar light tracking apparatus of 1st embodiment of this invention (The state which made the solar cell panel oppose the ground is shown). 1 is a perspective view of a solar light tracking device according to a first embodiment of the present invention (showing a state in which a light receiving surface of a solar cell panel faces upward). It is a perspective view of the solar light tracking apparatus of 2nd embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). It is a perspective view of the solar light tracking apparatus of 3rd embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). It is a perspective view of the sunlight tracking apparatus of 4th embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). FIG. 7 is a perspective view of a solar light tracking device according to a fourth embodiment of the present invention (showing a state in which a light receiving surface of a solar cell panel is opposed to the ground, FIG. 7 (a) is a bottom perspective view, and FIG. (B) shows a top perspective view). It is a perspective view of the sunlight tracking apparatus of 5th embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). It is a side view of the sunlight tracking apparatus of 5th embodiment of this invention (The state which has arrange | positioned the solar cell panel in the vertical surface is shown). It is a perspective view of the solar light tracking apparatus of 5th embodiment of this invention (The state which made the solar cell panel oppose the ground is shown). It is a perspective view of the flame | frame of the sunlight tracking apparatus of 5th embodiment of this invention. It is a perspective view of the example which added the deflection correction structure to the flame | frame of the sunlight tracking apparatus of 5th embodiment of this invention. It is a side view of the flame | frame of the sunlight tracking apparatus of FIG.

  Hereinafter, embodiments of a solar light tracking device of the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 show a solar light tracking device according to a first embodiment of the present invention. The solar light tracking device of this embodiment is used for a solar power generation system.

  FIG. 1 shows a state in which a solar cell panel 1 as a panel is arranged in a vertical plane. FIG. 2 shows a state where the light receiving surface of the solar cell panel 1 faces the ground. FIG. 3 shows a state in which the light receiving surface of the solar cell panel 1 faces upward.

  The solar light tracking device of the present embodiment includes a support 2, a solar cell panel 1 supported by the support 2, and a drive device 4 that drives the solar cell panel 1.

  The support column 2 is fixed to a foundation constructed on the ground, and rises vertically from the ground. The support column 2 includes a base 2a fixed to the foundation of the ground, and a support main body 2b coupled to the base 2a. The number of the support | pillars 2 of this embodiment is one.

  A driving device 4 is provided at the upper end of the column 2. The drive device 4 includes a turning shaft (not shown) that faces the vertical direction, and an inclined shaft 5 that is orthogonal to the turning shaft and faces the horizontal direction. The turning shaft is rotationally driven around a vertical line v by a speed reduction mechanism such as a motor or a worm gear. When the turning shaft is rotationally driven, the inclined shaft 5 orthogonal to the turning axis turns around the vertical line v. Since the solar cell panel 1 is coupled to the tilt shaft 5, the solar cell panel 1 turns around the vertical line v together with the tilt shaft 5. The tilt shaft 5 is rotationally driven around a horizontal line h by a speed reduction mechanism such as a motor or a worm gear. When the tilt shaft 5 is rotationally driven, the solar cell panel 1 is tilted around the horizontal line h, and the tilt angle of the solar cell panel 1 is adjusted. In this embodiment, as shown in FIG. 3, the solar cell panel 1 is in a state in which the light receiving surface faces upward and the solar cell panel 1 is parallel to the ground (the elevation angle of the normal line of the solar cell panel 1 is + 90 °). Then, as shown in FIG. 2, the light receiving surface is opposed to the ground and the solar cell panel 1 is rotated parallel to the ground (the elevation angle of the normal line of the solar cell panel 1 is −90 °).

  The driving device 4 controls the solar cell panel 1 so that the normal direction of the solar cell panel 1 matches the azimuth angle and altitude of the sun. The azimuth angle of the sun is a horizontal direction sign when the sun is viewed from a point on the ground where the solar light tracking device is installed, and is represented by an angle from the standard direction. The altitude of the sun is an angle obtained by measuring the direction of the sun from a reference horizontal plane. The drive device 4 incorporates a control device that controls a motor that drives the turning shaft and a motor that drives the tilt shaft 5. A program for tracking the solar cell panel 1 is recorded in the control device.

  The solar cell panel 1 is supported on the upper end portion of the support column 2 via the driving device 4. The solar cell panel 1 includes a pair of first solar cell panels 1a and 1b arranged in the same plane. A solar cell is an energy converter that absorbs solar light energy and converts it directly into electricity. A solar cell element that is a basic unit of a solar cell is called a cell. A module in which a required number of cells are arranged, protected with resin or tempered glass, and packaged is called a module. The pair of first solar cell panels 1a and 1b is formed by arranging a plurality of modules. In addition, the kind of solar cell is not specifically limited, For example, the concentrating solar cell which condenses using a lens and irradiates a cell can be used.

  A pair of first solar cell panels 1 a and 1 b are provided on the left and right sides of the column 2. Between the pair of first solar cell panels 1a and 1b, an opening 3 through which the support column 2 can pass is provided. The lateral width of the opening 3 is wider than the lateral width of the support 2 and the driving device 4 provided at the upper end of the support 2. A synchronization frame 6 is connected between the pair of first solar cell panels 1a and 1b. As shown in FIG. 1, in a state where the pair of first solar cell panels 1a and 1b are arranged in the vertical plane, the tilt axis 5 of the drive device 4 is in the vertical direction of the pair of first solar cell panels 1a and 1b. The synchronizing frame 6 provided above the support 2 and the driving device 4 is coupled to the upper ends of the pair of first solar cell panels 1a and 1b. The first solar cell panels 1a and 1b are formed in a quadrangular shape and are provided with quadrangular frame-like frames 7a and 7b on the back surface thereof. As shown in FIG. 2, brackets 8 are provided at the four corners of the frames 7 a and 7 b, and the panel bodies of the pair of first solar battery panels 1 a and 1 b are attached to the brackets 8.

  The operation of the solar light tracking device of the first embodiment of the present invention is as follows. The solar light tracking device turns the solar cell panel 1 around the turning axis in accordance with the azimuth angle of the sun, and inclines the solar cell panel 1 around the inclination axis 5 in accordance with the altitude of the sun. The tracking control of the solar cell panel 1 is performed by the driving device 4.

  As shown in FIG. 3, when a strong wind of a predetermined wind speed or more blows during the daytime, the driving device 4 has the light receiving surface of the solar cell panel 1 facing upward and the solar cell panel in order to retract the solar cell panel 1 from the strong wind. The solar cell panel 1 is rotated around the tilt axis 5 until 1 is parallel to the ground. The reason why the solar cell panel is directed upward at daytime is that the rotation angle of the solar cell panel 1 until the solar cell panel 1 becomes parallel is small. The elevation angle in the normal direction of the solar cell panel 1 at this time is + 90 °.

  As shown in FIG. 2, at night, the driving device 4 rotates the solar cell panel 1 around the tilt axis 5 so that the light receiving surface faces the ground. Further, the driving device 4 rotates around the turning axis so that the normal direction of the solar cell panel 1 faces the south direction. The position of the solar cell panel 1 at this time is the initial position. When the solar cell panel 1 returns to the initial position, the support column 2 passes through the opening 3 between the pair of first solar cell panels 1a and 1b.

  According to this embodiment, the opening part 3 which the support | pillar 2 can pass is provided between a pair of 1st solar cell panel 1a, 1b, and the support | pillar 2 is the opening part 3 of a pair of 1st solar cell panel 1a, 1b. Since the light receiving surfaces of the pair of first solar cell panels 1a and 1b face the ground, the negative elevation angle of the pair of first solar cell panels 1a and 1b can be increased. The dust deposited on the light receiving surfaces of the first solar cell panels 1a and 1b can be efficiently dropped.

  By returning the solar cell panel 1 to the initial position at night, the dust accumulated on the light receiving surface can be removed while securing the amount of power generation during the daytime. In addition, it is possible to prevent dust that has been swept in the wind at night from accumulating on the light receiving surface. The dust accumulated on the light receiving surface at night is easy to get wet and adhere to the night dew at night, but it is possible to prevent the dust from sticking at night by preventing the accumulation of dust at night. Furthermore, the solar light tracking device can be evacuated from strong winds at night.

  Furthermore, by connecting the pair of first solar cell panels 1a and 1b with the synchronization frame 6, the pair of first solar cell panels 1a and 1b can be inclined in synchronization.

  Furthermore, the pair of first solar cell panels 1a and 1b can be supported in a well-balanced manner by coupling the driving device 4 to the vertical center of the pair of first solar cell panels 1a and 1b. The self-weight moments of the first solar cell panels 1a and 1b can be canceled as much as possible.

  The solar battery panel 1 can be provided with a cleaning function such as a wiper for cleaning the light receiving surface. As shown in FIG. 2, the dust removal efficiency of the light receiving surface is improved by cleaning the solar cell panel 1 with the light receiving surface facing downward. Further, only when the normal direction of the solar cell panel 1 is directed toward the south, the support column 2 can pass through the opening 3 of the pair of first solar cell panels 1a and 1b.

  FIG. 4 shows a solar light tracking device according to the second embodiment of the present invention. In the solar light tracking device of the second embodiment, the point of providing the second solar cell panel 1c that receives sunlight and generates power between the pair of first solar cell panels 1a and 1b is the first embodiment. Different from solar tracking device. The pair of first solar cell panels 1a and 1b and the second solar cell panel 1c are arranged in the same plane. In a state where the pair of first solar cell panels 1a and 1b are arranged in the vertical plane, the second solar cell panel 1c is disposed between the pair of first solar cell panels 1a and 1b, and the support column 2 and the driving device 4. Is disposed above. Since the other configuration is the same as that of the solar light tracking device of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to the solar light tracking device of the second embodiment, since the second solar cell panel 1c is provided between the pair of first solar cell panels 1a and 1b, the power generation amount can be increased.

  FIG. 5 shows a solar light tracking device according to a third embodiment of the present invention. The solar tracking device of the third embodiment is different from the solar tracking device of the first embodiment in that the synchronization frame 6 is not connected between the pair of first solar cell panels 1a and 1b. Since the other configuration is the same as that of the solar light tracking device of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to the solar light tracking device of the third embodiment, it is possible to avoid the support column while the pair of first solar battery panels 1a and 1b rotate 360 degrees around the tilt axis 5. For this reason, various control of a pair of 1st solar cell panel 1a, 1b is attained.

  6 and 7 show a solar light tracking device according to a fourth embodiment of the present invention. FIG. 6 shows a state in which the solar cell panel 11 is arranged in a vertical plane, and FIG. 7 shows a state in which the light receiving surface of the solar cell panel 11 faces the ground.

  The solar light tracking device of the fourth embodiment includes a support 2, a solar cell panel 11 supported by the support 2, and a drive device 4 (see FIG. 7B) that drives the solar cell panel 11. Since the structure of the support | pillar 2 and the drive device 4 is as substantially the same as the sunlight tracking apparatus of 1st embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. As shown in FIG.7 (b), the inclination axis | shaft 5 of the drive device 4 is formed elongate over the full width of a solar cell panel. The solar cell panel 11 is coupled to the inclined shaft 5.

  In the solar light tracking device of the fourth embodiment, as shown in FIG. 6, in the state where the solar cell panel 11 is arranged in the vertical plane, the solar cell panel 11 has its vertical direction at the center in the width direction. A notch 13 (see FIG. 7A) extending from the center to the lower end is formed. The solar cell panel 11 is provided on both the left and right sides and above the notch 13. The notch portion 13 is provided with a sub solar cell panel 15 (shown by hatching in the figure) that fits into the notch portion 13 and is rotatably connected to the solar cell panel 11 via a hinge 14. . The sub solar cell panel 15 receives sunlight and generates power in the same manner as the solar cell panel 11.

  As shown in FIG. 6, in the state where the solar cell panel 11 is arranged in the vertical plane, the sub solar cell panel 15 arranged in the same plane as the solar cell panel 11 hits the support column. When the solar cell panel 11 is further rotated downward from this state, the position of the sub solar cell panel 15 remains the same, and only the solar cell panel 11 is rotated downward. This is because the sub solar cell panel 15 remains in contact with the support 2. At this time, the column 2 passes through the opening formed by the notch 13 of the solar cell panel 11. As shown in FIG. 7A, the driving device 4 drives the solar cell panel 11 so that the light receiving surface of the solar cell panel 11 faces the ground and the normal direction faces the south direction at night. .

  According to the solar light tracking device of the fourth embodiment, the notch portion 13 is provided in the solar cell panel 11, and the support column 2 passes through the opening formed by the notch portion 13 to receive light of the solar cell panel 11. Since the surface faces the ground, the negative elevation angle of the solar cell panel 11 can be increased, and dust accumulated on the light receiving surface of the solar cell panel 11 can be efficiently dropped. Moreover, the amount of power generation can be increased by providing the sub solar cell panel 15 in the notch 13.

  8 to 10 show a solar light tracking device according to a fifth embodiment of the present invention. 8 and 9 show a state in which the solar cell panel 21 is disposed in a vertical plane, and FIG. 10 shows a state in which the light receiving surface of the solar cell panel 21 faces downward.

  Similarly to the solar light tracking device of the first embodiment, the solar light tracking device of this embodiment also includes a support column 22, a solar cell panel 21 supported by the support column 22, and a driving device 24 that drives the solar cell panel 21. Prepare. The solar cell panel 21 includes a pair of first solar cell panels 21 a and 21 b disposed on the left and right sides of the column 22. Unlike the first solar cell panels 1a and 1b of the first embodiment, the first solar cell panels 21a and 21b are stepped panels.

  The support column 22 is fixed to a foundation constructed on the ground, and rises vertically from the ground. A driving device 24 is provided at the upper end of the column 22. The drive device 24 includes a turning shaft (not shown) that faces in the vertical direction, and an inclined shaft 25 (see FIG. 9) that is orthogonal to the turning shaft and faces in the horizontal direction. When the turning shaft is driven to rotate, the tilt axis 25 orthogonal to the turn axis turns around the vertical line v, and the solar cell panel 21 turns around the vertical line v together with the tilt axis 25. When the tilt shaft 25 is rotationally driven, the solar cell panel 21 rotates around the horizontal line h. As shown in FIG. 10, the solar cell panel 21 has a light-receiving surface as shown in FIG. 10 from a state where the light-receiving surface faces upward and the solar cell panel 21 is parallel to the ground (the normal angle of the solar cell panel 21 is + 90 °). Is opposed to the ground and the solar cell panel 21 is rotated to a state parallel to the ground (a state where the elevation angle of the normal line of the solar cell panel 21 is −90 °).

  The drive device 24 controls the solar cell panel 21 so that the normal direction of the solar cell panel 21 coincides with the azimuth angle and altitude of the sun. The drive device 24 incorporates a motor that drives the turning shaft and a control device that controls the motor that drives the tilt shaft 25.

  The solar cell panel 21 includes a pair of first solar cell panels 21 a and 21 b disposed on the left and right sides of the column 22. Between the pair of first solar cell panels 21a and 21b, an opening 23 through which the column 22 can pass is provided. Each of the first solar cell panels 21a and 21b includes a front panel 21-2 having a center of gravity W1 on the front side of the tilt axis 25 and a rear panel 21-1, 21-3 having a center of gravity W2 on the back side of the tilt axis 25. (See FIG. 9). The rear panels 21-1 and 21-3 are arranged in the upper and lower stages of the first solar cell panels 21a and 21b, and in this embodiment, are constituted by a total of four modules. Each module is composed of 5 vertical cells, 5 horizontal cells, and a total of 5 × 5 = 25 cells. The front panel 21-2 is arranged in the middle of the first solar cell panels 21a and 21b, and in this embodiment, is composed of a total of two modules. Each module is composed of 5 vertical cells, 5 horizontal cells, and a total of 5 × 5 = 25 cells.

  Here, the front side and the rear side mean that the first solar cell panels 21a and 21b are arranged in a vertical plane and the light receiving surfaces of the first solar cell panels 21a and 21b face the front. The solar cell panels 21a and 21b are front and rear sides when viewed from the front. Further, as shown in FIG. 9, the rear panels 21-1 and 21-3 include the rear panel body 27 and the planar frame 28 that supports the rear panel body 27. The center of gravity W2 of 21-1, 21-3 is the center of gravity of the rear panel body 27 and the planar frame 28 combined. Similarly, the front panel 21-2 includes a front panel body 29 and a three-dimensional frame 30 that supports the front panel body 29. Therefore, the center of gravity W1 of the front panel 21-2 is equal to the front panel body 29 and the three-dimensional frame. This is the center of gravity of the combined frame 30. The planar frame 28 and the three-dimensional frame 30 will be described later.

  According to the solar light tracking device of the present embodiment, since the wind passes through the opening 23 between the pair of first solar cell panels 21a and 21b on the left and right sides of the support column 22, the moment due to the wind can be reduced. Therefore, the entire solar tracking device can be made compact. Moreover, since a pair of 1st solar cell panel 21a, 21b is arrange | positioned at the right-and-left both sides of the support | pillar 22, and each 1st solar cell panel 21a, 21b is arrange | positioned before and after the inclination axis | shaft 25, the turning axis of the drive device 24 is provided. In addition, with respect to the two axes of the inclined axis 25, the panel arrangement can be made such that the self-weight moments of the first solar cell panels 21a and 21b are balanced, and the drive device 24 can be made compact. Further, the rear panels 21-1, 21-3 are arranged in the upper and lower stages of the first solar cell panels 21a, 21b, and the front panel 21-2 is the middle stage of the first solar cell panels 21a, 21b. Therefore, the self-weight moments of the front panel 21-2 and the rear panels 21-1, 21-3 are balanced over the entire length of the inclined shaft 25 in the axial direction. Note that the self-weight moments of the front panel 21-2 and the rear panels 21-1, 21-3 may be reduced even if they are not completely offset.

  FIG. 11 shows a perspective view of the frame 31 of the solar light tracking device. FIG. 11 shows a state in which the rear panel body 27 (see FIG. 9) and the front panel body 29 (see FIG. 9) are removed. A pair of frames 31 a and 31 b are attached to the inclined shaft 25 via a connecting bracket 32. Each of the frames 31a and 31b includes a planar frame 28 that supports a rear panel body 27 (see FIG. 9) disposed in the upper and lower stages, and a front panel that is coupled to the planar frame 28 and disposed in the middle stage. And a three-dimensional frame 30 that supports a main body 29 (see FIG. 9).

  The planar frame 28 is formed in a frame shape arranged in one plane. A rectangular rear panel support portion 28 a that supports the upper rear panel body 27 is formed on the upper portion of the planar frame 28. A rectangular rear panel support portion 28 b that supports the lower rear panel body 27 at the lower stage is formed at the lower portion of the planar frame 28.

  The three-dimensional frame 30 is formed in a box shape. The three-dimensional frame 30 includes a frame-shaped front panel support portion 30a arranged on a parallel plane spaced a predetermined distance from the plane on which the flat frame 28 is arranged, and the four corners and the plane of the front panel support portion 30a. And four pillar portions 30b for joining the typical frame 28 to each other. A reinforcing beam 33 is coupled to the frame-shaped front panel support portion 30a. The reinforcing beam 34 is also coupled to a portion where the column portion 30b of the planar frame 28 is coupled.

  According to the solar light tracking device of the present embodiment, the frame 31 is configured by the planar frame 28 and the three-dimensional frame 30, whereby the rigidity of the frame 31 can be increased. Accordingly, the tracking performance can be improved.

  The operation of the solar light tracking device of the fifth embodiment of the present invention is the same as the operation of the solar light tracking device of the first embodiment. That is, the solar light tracking device turns the solar cell panel 21 around the turning axis in accordance with the azimuth angle of the sun, and inclines the solar cell panel 21 around the inclination axis 25 in accordance with the altitude of the sun. When a strong wind of a predetermined wind speed or more blows in the daytime, the driving device 24 has the light receiving surface of the solar cell panel 21 facing upward and the solar cell panel 21 parallel to the ground in order to retract the solar cell panel 21 from the strong wind. Until the solar cell panel 21 is rotated about the tilt axis 25. On the other hand, at night, in order to remove dust accumulated on the light receiving surface, the driving device 24 rotates the solar cell panel 21 around the inclined axis 25 so that the light receiving surface faces the ground. Further, the driving device 24 rotates around the turning axis so that the normal direction of the solar cell panel 21 faces the south direction.

  12 and 13 show an example in which deflection correction structures 40a to 40d are added to the frame 31b of the solar light tracking device according to the fifth embodiment of the present invention. 12 shows a perspective view of the frame 31b, and FIG. 13 shows a side view of the frame 31b. 12 shows an example in which the deflection correcting structures 40a to 40d are added to one 31b of the pair of frames 31a and 31b of FIG. 11, but the deflection correcting structures 40a to 40d are also added to the frame 31a. As shown in FIG. 12, a total of four deflection correction structures 40a to 40d are provided so that the positions of the four corners of the planar frame 28 can be adjusted. Each deflection correcting structure 40a-40d includes a pair of first and second tension applying members 41a-41d, 42a-42d.

  As shown in FIG. 12, the frame 31 b includes a planar frame 28 that supports the rear panels 21-1 and 21-3 (see FIG. 8) disposed in the upper stage and the lower stage, and a front panel disposed in the middle stage. And a box-shaped three-dimensional frame 30 that supports 21-2 (see FIG. 8). The planar frame 28 has square rear panel support portions 28a and 28b to which upper and lower rear panels 21-1 and 21-3 (see FIG. 8) are attached. The three-dimensional frame 30 has a frame-shaped front panel support portion 30a to which a middle front panel 21-2 (see FIG. 8) is attached. There is a step between the panel mounting surface P1 (see FIG. 13) of the planar frame 28 and the panel mounting surface P2 (see FIG. 13) of the three-dimensional frame 30. 12 and 13 also show module frames 36a to 36c attached to the panel attachment surfaces P1 and P2. A module main body composed of a plurality of cells is placed on the frames 36a to 36c.

  As shown in FIG. 12, the deflection correcting structures 40a to 40d include string-like or rod-like first tension applying members 41a to 41d whose both ends are connected to the frame 31b, and first tension applying members 41a to 41d. Similarly, a string-like or rod-like second tension applying member 42a to 42d having both ends connected to the frame 31b are provided. As shown in FIG. 13, the first tension applying members 41 a to 41 d are arranged on one side S <b> 1 of the two spaces S <b> 1 and S <b> 2 defined by the panel mounting surface P <b> 1 of the planar frame 28. The second tension applying members 42a to 42d are disposed on the other side S2 of the two spaces S1 and S2 defined by the panel mounting surface P1 of the planar frame 28. The first tension applying members 41a to 41d pull the planar frame 28 so that the panel mounting surface P1 of the planar frame 28 is displaced to the one side S1. The second tension applying members 42a to 42d pull the planar frame 28 so that the panel mounting surface P1 of the planar frame 28 is displaced to the other side S2. By using the first and second tension applying members 41a to 41d and 42a to 42d in pairs, the flat frame 28 is corrected even if the flat frame 28 is bent or distorted on either side of S1 and S2. And the flatness of the panel mounting surface P1 can be ensured.

  The detailed structure of the deflection correcting structures 40a to 40d is as follows. The first tension applying members 41 a to 41 d are bridged between the support column 37 coupled to the three-dimensional frame 30 and the front end portion of the planar frame 28. By bridging the first tension applying members 41 a to 41 d between the both 30 and 28, the position of the front end portion of the planar frame 28 can be adjusted. The first tension applying members 41a to 41d are arranged on the outside of the solar cell panel so as not to shadow the daylighting surface of the solar cell panel. The first tension applying members 41a to 41d include a turnbuckle 43 as a tension adjusting mechanism so that the tension can be adjusted. That is, the first tension applying members 41 a to 41 d are supported by the bracket 45 rotatably connected to the support column 37 via the support shaft 44, the screw shaft 46 coupled to the bracket 45, and the planar frame 28. A bracket 48 rotatably connected via a shaft 49, a screw shaft 47 coupled to the bracket 48, and a turnbuckle 43 screwed to the screw shaft 46 and the screw shaft 47 are provided. One of the screw shafts 46 and 47 is a right-hand thread, and the other is a left-hand thread. When the turnbuckle 43 is rotated, the screw shafts 46 and 47 screwed to both ends of the turnbuckle 43 are tightened or loosened, and the tension can be adjusted.

  The second tension applying members 42 a to 42 d are bridged between the three-dimensional frame 30 and the front end portion of the planar frame 28. The 2nd tension | tensile_strength provision members 42a-42d are also arrange | positioned on the outer side of a solar cell panel so that a shadow may not appear on the lighting surface of a solar cell panel. Since the three-dimensional frame 30 is formed in a box shape, the rigidity is higher than that of the planar frame 28. By bridging the second tension applying members 42 a to 42 d between the both 30 and 28, the position of the front end portion of the planar frame 28 can be adjusted. The second tension applying members 42a to 42d also include a turnbuckle 51 as a tension adjusting mechanism so that the tension can be adjusted. That is, the second tension applying members 42a to 42d include a bracket 53 that is rotatably connected to the three-dimensional frame 30 via a support shaft 52, a screw shaft 54 that is coupled to the bracket 53, and a planar frame. 28, a bracket 56 that is rotatably connected to the tip of the support shaft 57 via a support shaft 57, a screw shaft 55 that is coupled to the bracket 56, and a turnbuckle 51 that is screwed to the screw shaft 55. . One of the screw shafts 54 and 55 is a right-hand thread, and the other is a left-hand thread. When the turnbuckle 51 is rotated, the screw shafts 54 and 55 screwed to both ends of the turnbuckle 51 are tightened or loosened, and the tension can be adjusted.

  In addition, although this 2nd tension | tensile_strength imparting member 42a-42d is shown by this FIG. 12, the example connected with the front end side of the planar frame 28 rather than the 1st tension | tensile_strength imparting member 41a-41d is shown, This is because the lengths of the first tension applying members 41a to 41d and the second tension applying members 42a to 42d are equalized. The first tension applying members 41a to 41d are longer than the second tension applying members 42a to 42d, and the first tension applying members 41a to 41d and the second tension applying members 42a to 42d are planar frames 28. It can also be connected to the same position of the tip of the.

  As shown in FIG. 13, when the turnbuckle 43 of the first tension applying members 41a to 41d is rotated, for example, clockwise, the screw shafts 46 and 47 are tightened, and the tip of the planar frame 28 is indicated by an arrow A1. Deforms in the direction shown. Similarly, when the turnbuckle 51 of the second tension applying members 42a to 42d is rotated in the clockwise direction, the screw shafts 54 and 55 are tightened, and the tip of the planar frame 28 is deformed in the direction indicated by the arrow A2. . By adjusting the positions of the four corners of the planar frame 28 with the four pairs of deflection correcting structures 40a to 40d, the flatness of the planar frame 28 can be ensured.

  As shown in FIG. 12, the planar frame 28 has upper and lower rear panel support portions 28a and 28b. In order to further improve the flatness of the panel mounting surface P1 of each of the rear panel support portions 28a and 28b, third and fourth tension applying members 61 and 62 indicated by two-dot chain lines in FIG. it can. The third tension applying member 61 is bridged between the three-dimensional frame 30 and the base end portion of the planar frame 28, and reinforces the frame 31b like a brace. The fourth tension applying member 62 is bridged between the support column 37 coupled to the three-dimensional frame 30 and the base end portion of the planar frame 28, and reinforces the frame 31b like a brace. As shown in FIG. 13, by adjusting the tensions of the third and fourth tension applying members 61 and 62 by a turnbuckle (not shown), the base end portion of the planar frame 28 is indicated by arrows A3 and A4 in FIG. It can be deformed in the direction shown. 12 and 13 show a pair of third and fourth tension applying members 61 and 62 for easy understanding, but a total of four pairs of third and fourth tension applying members. 61, 62 are provided.

  The solar cell panel has a characteristic that power generation efficiency is lowered unless the light receiving surface is perpendicular to sunlight. In particular, in the case of a concentrating solar cell panel, a high-accuracy squareness of the light receiving surface and sunlight is required. Even if the sunlight is accurately tracked by the drive device 24 (see FIG. 8), if the frame 31b itself is bent or distorted, the squareness cannot be maintained. Even if the number of beams is larger than the design value considering the wind load and the weight of the solar battery panel and the column is thickened, the deflection and distortion of the frame 31b cannot be completely suppressed. When the frame 31b is long or when the frame 31b is plated, the deflection and distortion become larger. If a shim or a spacer is sandwiched between the solar cell panel and the frame 31b, the flatness of the panel mounting surfaces P1 and P2 can be improved. However, it takes time to adjust the flatness or the frame 31b is changed over time. A new problem arises in that changing deflection and distortion cannot be corrected.

  Like the deflection correction structures 40a to 40d of the present embodiment, the first and second tension applying members 41a to 41d and 42a to 42d are arranged on both sides of the panel mounting surface P1 of the planar frame 28, thereby It is possible to correct the deflection and distortion of the typical frame 28 and improve the flatness of the panel mounting surface P1 of the planar frame 28. In addition, since the first and second tension applying members 41a to 41d and 42a to 42d can also have a role of reinforcing the frame 31b, when a force such as a wind load acts on the frame 31b, or the frame 31b Even when a heavy solar battery panel is placed, the frame 31b can be prevented from being bent.

  The present invention is not limited to the above embodiment, and can be embodied in various embodiments without departing from the scope of the present invention.

  In the above embodiment, a biaxial type solar tracking device that tracks the solar cell panel in both the azimuth angle and altitude of the sun is used, but the solar cell panel is only in one of the azimuth angle and altitude of the sun. A single-axis type solar tracking device for tracking can also be used.

  In the above embodiment, the turning axis of the driving device is parallel to the vertical line, but the turning axis of the driving device can also be parallel to the ground axis.

  In the above-described embodiment, the turning shaft and the tilt shaft of the driving device are driven to rotate by a speed reduction mechanism such as a motor or worm gear.

  In the above embodiment, one driving device is provided for one solar tracking device. However, one driving device may be provided for a plurality of solar tracking devices, and the driving device may be shared.

  In the above embodiment, the support column is fixed to the foundation of the ground. However, the support column can be fixed on a turnable base.

  In the above-described embodiment, the elevation angle of the normal line of the solar cell panel at the initial position at night is set to −90 °, but can be shifted from −90 ° if dust can be dropped.

  In the above embodiment, the light receiving surface of the solar cell panel is opposed to the ground at night, but the light receiving surface of the solar cell panel can be opposed to the ground at daytime.

  In the above embodiment, the solar light tracking device is applied to the solar power generation system, but can also be applied to the solar thermal power generation system. In this case, a condensing panel composed of a lens or a reflecting mirror is used instead of the solar cell panel.

  As shown in FIGS. 12 and 13, the deflection correcting structures 40a to 40d according to the fifth embodiment of the present invention include a panel mounting surface P1 of the planar frame 28 and a panel mounting surface P2 of the three-dimensional frame 30. However, the present invention can also be applied to a frame in which all panel mounting surfaces P1 and P2 are arranged in the same plane.

DESCRIPTION OF SYMBOLS 1 ... Solar cell panel, 1a, 1b ... 1st solar cell panel, 1c ... 2nd solar cell panel, 2 ... support | pillar, 3 ... opening part, 4 ... drive device, 5 ... inclined axis, 6 ... synchronous frame, DESCRIPTION OF SYMBOLS 11 ... Solar cell panel, 13 ... Notch part, 15 ... Sub solar cell panel, 21 ... Solar cell panel, 21a, 21b ... First solar cell panel, 21-2 ... Front panel, 21-1, 21-3 ... rear panel, 22 ... column, 23 ... opening, 24 ... driving device, 25 ... tilting axis, 27 ... rear panel body, 28 ... planar frame, 29 ... front panel body, 30 ... three-dimensional frame , W1 ... center of gravity of front panel, W2 ... center of gravity of rear panel

In order to solve the above-mentioned problems, the present invention is a solar light tracking device that tracks sunlight, a support column, a solar cell panel that is supported by the support column and receives or collects sunlight, and a solar altitude. and to track at least one of azimuth, and a driving device for driving the solar panel, the solar panel, have a opening which can pass through the strut, the driving device, the The solar light tracking device drives the solar cell panel so that the light receiving surface or the light collecting surface of the solar cell panel faces the ground and is parallel to the ground .

Claims (9)

A solar tracking device that tracks sunlight,
Struts,
A panel that is supported by the column and receives or collects sunlight; and
A driving device for driving the panel so as to track at least one of the altitude and azimuth of the sun, and
The said panel is a sunlight tracking apparatus which has an opening part which can pass the said support | pillar.   2. The solar light tracking device according to claim 1, wherein the driving device drives the panel so that a light receiving surface or a light collecting surface of the panel faces the ground at night. The panel includes a pair of first panels on both left and right sides of the support column,
The solar tracker according to claim 1, wherein the support column passes through the opening between the pair of first panels.   The solar light tracking device according to claim 3, wherein a second panel that receives or collects sunlight is provided between the pair of first panels.   5. The solar light tracking device according to claim 3, wherein, in a state where the panels are arranged in a vertical plane, a central portion in the vertical direction of the pair of first panels is connected to the driving device. . In the state in which the panel is arranged in a vertical plane, the panel is provided with a notch extending from the center in the vertical direction to the lower end at the center in the width direction,
The solar tracker according to claim 1, wherein the column passes through the opening formed by the notch of the panel. The notch is provided with a sub-panel that fits into the notch and receives or collects sunlight.
The solar tracking device according to claim 6, wherein the sub panel is rotatably connected to the panel. The drive device includes an inclined axis that drives the panel so as to track the altitude of the sun,
In a state where the panel is arranged in a vertical plane and the light receiving surface or the light collecting surface of the panel is directed to the front, the panel has a front panel whose center of gravity is on the front side of the tilt axis, and the center of gravity is the tilt axis. The solar light tracking device according to any one of claims 1 to 3, further comprising: a rear panel on the rear side of the rear panel. The rear panel includes a rear panel body disposed on the upper and lower stages of the panel, and a frame-shaped planar frame that supports the rear panel body,
The front panel includes a front panel body disposed in a middle stage of the panel, and a box-shaped three-dimensional frame that supports the front panel body and is coupled to the planar frame. The solar light tracking device according to claim 8.

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