A solar photovoltaic device

Abstract

The present invention relates to the field of photovoltaic technology, and in particular provides a solar photovoltaic device, comprising a base frame, a first display frame tilted forward and backward mounted on the top of the base frame, a screw mounted on the first display frame, a front end of the screw mounted to the front end of the first display frame via a bearing, and a rear end of the screw mounted to the rear end of the first display frame via a bearing, a second display frame being provided on the bottom surface of the base frame, a transmission seat mounted on the screw, the transmission seat being fixed to the front end of the second display frame, the top surface of the second display frame sliding on the bottom surface of the first display frame, and when the screw rotates forward and reverse, the transmission seat drives the second display frame to move forward and backward along the bottom surface of the first display frame, a first hinge shaft mounted on the second display frame, the first hinge shaft being close to the front end of the second display frame, and a third display frame mounted on the first hinge shaft, thereby not only improving the light energy absorption rate but also preventing additional wind resistance due to the increase in photovoltaic area.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a solar photovoltaic device. Background Art

[0002] The adjustable flexible photovoltaic solar bracket is a bracket that supports the solar panels, and a flexible rope with adjustable tightness is installed on the surface of the bracket to improve the wind resistance of the photovoltaic panels. Some photovoltaic devices also have a cleaning function.

[0003] In the existing technology, the photovoltaic surface is either set to be smaller to benefit from wind resistance, or set to be larger to benefit from efficient light energy conversion. The former has a smaller photovoltaic surface, so the light energy conversion efficiency is low, and the latter has a longer photovoltaic surface arm span, so it occupies a larger space and has poor wind resistance. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides the following technical solutions:

[0005] A solar photovoltaic device includes a base frame, a first display frame tilted forward and backward is installed on the top of the base frame, a screw is installed on the first display frame, the front end of the screw is installed on the front end of the first display frame through a bearing, and the rear end of the screw is installed on the rear end of the first display frame through a bearing, a second display frame is provided on the bottom surface of the base frame, a transmission seat is installed on the screw, and the transmission seat is fixed to the front end of the second display frame. The top surface of the second display frame slides on the bottom surface of the first display frame. When the screw rotates forward and reverse, the transmission seat drives the second display frame to move forward and backward along the bottom surface of the first display frame. A first hinge shaft is installed on the second display frame, and the first hinge shaft is close to the front end of the second display frame. A third display rack is mounted on the first hinge axis, a second hinge axis is mounted on the front end of the top of the first display rack, and a fourth display rack tilted forward and upward is connected to the second hinge axis. A first photovoltaic panel is mounted on the top surface of the first display rack, a second photovoltaic panel is mounted on the top surface of the third display rack, and a third photovoltaic panel is mounted on the top surface of the fourth display rack. The third photovoltaic panel forms an obtuse angle with the first photovoltaic panel. A gas spring is connected between the bottom of the third display rack and the rear end of the second display rack. When the second display rack moves backward, the action rod of the gas spring releases its length toward the bottom surface of the third display rack, and the third display rack deflects the second photovoltaic panel upward to the obtuse angle of the first photovoltaic panel.

[0006] A driving mechanism is provided between the second display rack and the fourth display rack. When the second display rack moves back and forth along the bottom surface of the base frame, the driving mechanism drives the third photovoltaic panel to rotate back and forth relative to the first photovoltaic panel.

[0007] Preferably, the driving mechanism includes a rack fixed to the outer wall surface of the second display rack, and a gear fixed to the outer end of the second hinge shaft, the gear being located on the path of the rack's forward and backward movement. When the second display rack moves forward along the bottom surface of the first display rack, not only does it cause the second photovoltaic panel to enter the bottom surface of the first display rack, pushing the third display rack to deflect downward, but also when the rack moves to engage with the gear, the gear drives the second hinge shaft, and the second hinge shaft drives the fourth display rack to rotate toward the first photovoltaic panel.

[0008] Preferably, a slider is fixed to the rear side of the top surface of the third display rack, a sliding cavity is provided on the slider, the slider and the screw are in the same straight line, and a rounded corner is provided on the rear side of the top end of the sliding cavity.

[0009] Preferably, a servo motor is installed on the first display rack, an actuating shaft of the servo motor is connected to the screw, and a controller and a sensor electrically connected to the servo motor are provided on the base frame.

[0010] Preferably, a rubber strip is provided between the top surface of the second display rack and the bottom surface of the first display rack, and the top surface of the second display rack slides on the bottom surface of the first display rack via the rubber strip.

[0011] Preferably, a first pull plate is fixed on the second hinge shaft, a second pull plate is fixed to the front end of the first display rack, the second pull plate is located in front of the first pull plate, a return spring is connected to the first pull plate, the other end of the return spring is connected to the second pull plate, a limit plate is fixed to the front end of the first display rack, the limit plate extends upward and is installed with a rubber plate, and the fourth display rack rests on the rubber plate.

[0012] Preferably, the first display rack has first exhaust holes on both sides thereof, the second display rack has second exhaust holes on both sides thereof, and an exhaust passage communicating with each other is provided between the bottom rack and the first display rack.

[0013] Preferably, the second photovoltaic panel and the third photovoltaic panel are both rectangular, and a reflector is installed on the four corners of the photovoltaic surface of the second photovoltaic panel and the third photovoltaic panel. The reflector on the second photovoltaic panel is tilted toward the photovoltaic surface of the first photovoltaic panel, and the reflector on the third photovoltaic panel is tilted toward the photovoltaic surface of the first photovoltaic panel.

[0014] The beneficial effects of the present invention compared to the prior art are:

[0015] 1. A second photovoltaic panel and a third photovoltaic panel are installed on both sides of the original first photovoltaic panel via a second display rack, a third display rack, and a fourth display rack. In normal weather, the second display rack is located behind the first display rack, that is, the third and fourth display racks are displayed on both sides of the first display rack in a deflected upward manner. In other words, the second photovoltaic panel and the third photovoltaic panel are displayed on both sides of the first photovoltaic panel in a deflected upward manner. The second photovoltaic panel, the third photovoltaic panel, and the first photovoltaic panel together form a light energy absorption area, increasing the photovoltaic area and improving the conversion efficiency when converting electrical energy to the converter. Moreover, unlike ordinary multi-panel photovoltaic panels, the second and third photovoltaic panels are displayed on both sides of the first photovoltaic panel at an obtuse angle. Therefore, when light shines on the three photovoltaic panels, it can be refracted back to the photovoltaic surface of each other, enhancing the utilization rate of light energy.

[0016] 2. The second display frame is movable by a screw drive. In case of sudden strong winds, the screw rotates, and the transmission seat moves linearly along the screw drive. The transmission seat carries the second display frame forward along the bottom surface of the first display frame, and the second display frame carries the first hinge shaft forward. The first hinge shaft carries the third display frame forward. When the rotating end of the third display frame enters the bottom surface of the first display frame and continues to move forward, it is squeezed by the bottom surface of the first display frame and deflected downward into the second display frame. The third display frame carries the second photovoltaic panel into the second display frame. The second display frame continues to move along the bottom surface of the first display frame, and the top surface of the second photovoltaic panel continues to slide forward along the bottom surface of the first display frame. When the front end of the second display frame moves forward to coincide with the front end of the first display frame, the second display frame stops moving and stores the second photovoltaic panel under the bottom surface of the first display frame. When strong winds hit, the rear photovoltaic area formed by the second photovoltaic panel will not generate wind resistance, and has strong wind resistance.

[0017] 3. A rack and pinion structure is installed between the second and fourth display racks. As the second display rack advances, the rack rotates the pinion clockwise, which in turn rotates the second hinged axis clockwise. This second hinged axis rotates the fourth display rack clockwise, and the fourth display rack, along with the third photovoltaic panel, rotates clockwise, placing the photovoltaic surface on the first panel. In strong winds, this automatically reduces the front photovoltaic area of the first panel. This eliminates wind resistance in strong winds, further enhancing wind resistance. In summary, this not only improves light energy absorption, but also eliminates the additional wind resistance associated with the increased photovoltaic area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a solar photovoltaic device provided in an embodiment of the present invention;

[0019] Figure 2 The solar photovoltaic device provided by the embodiment of the present invention is composed of Figure 1 The enlarged schematic diagram of part A is shown;

[0020] Figure 3 A side plan view of a solar photovoltaic device provided in an embodiment of the present invention;

[0021] Figure 4 The solar photovoltaic device provided by the embodiment of the present invention is composed of Figure 1 A schematic diagram from another perspective;

[0022] Figure 5 The solar photovoltaic device provided by the embodiment of the present invention is composed of Figure 4 The enlarged schematic diagram of part B is shown;

[0023] Figure 6 A schematic diagram of a solar photovoltaic device provided by an embodiment of the present invention when the base frame is removed, viewed from an upward perspective;

[0024] Figure 7 This is a schematic diagram of only the second display rack in the solar photovoltaic device provided in an embodiment of the present invention.

[0025] In the figure: 1. Base frame; 2. First display frame; 3. Screw; 4. Second display frame; 5. Transmission seat; 6. First hinge shaft; 7. Third display frame; 8. Second hinge shaft; 9. Fourth display frame; 10. First photovoltaic panel; 11. Second photovoltaic panel; 12. Third photovoltaic panel; 13. Gas spring; 14. Rack; 15. Gear; 16. Servo motor; 17. First pull plate; 18. Second pull plate; 19. Return spring; 20. Limit plate; 21. Rubber plate; 22. First exhaust hole; 23. Second exhaust hole; 24. Exhaust channel; 25. Slider; 26. Sliding cavity; 27. Fillet; 28. Reflector. DETAILED DESCRIPTION

[0026] The above and other embodiments and advantages of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments.

[0027] In one embodiment, Figure 1-Figure 7 As shown:

[0028] This embodiment provides a solar photovoltaic device, including a base frame 1. A first display frame 2, which is tilted forward and backward, is mounted on the top of the base frame 1. A screw 3 is mounted on the first display frame 2. The front end of the screw 3 is mounted on the front end of the first display frame 2 via a bearing, and the rear end of the screw 3 is mounted on the rear end of the first display frame 2 via a bearing. A second display frame 4 is provided on the bottom surface of the base frame 1. A transmission seat 5 is mounted on the screw 3. The transmission seat 5 is fixed to the front end of the second display frame 4. The top surface of the second display frame 4 slides on the bottom surface of the first display frame 2. When the screw 3 rotates forward and backward, the transmission seat 5 carries the second display frame 4 to move forward and backward along the bottom surface of the first display frame 2. A first hinge shaft 6 is mounted on the second display frame 4, and the first hinge shaft 6 is close to the front end of the second display frame 4. A third display rack 7 is mounted on the first hinge axis 6. A second hinge axis 8 is mounted on the front end of the top of the first display rack 2. A fourth display rack 9, tilted forward and upward, is connected to the second hinge axis 8. A first photovoltaic panel 10 is mounted on the top surface of the first display rack 2. A second photovoltaic panel 11 is mounted on the top surface of the third display rack 7. A third photovoltaic panel 12 is mounted on the top surface of the fourth display rack 9. The third photovoltaic panel 12 forms an obtuse angle with the first photovoltaic panel 10. A gas spring 13 is connected between the bottom of the third display rack 7 and the rear end of the second display rack 4. When the second display rack 4 moves backward, the actuating rod of the gas spring 13 releases its length toward the bottom surface of the third display rack 7, and the third display rack 7, carrying the second photovoltaic panel 11, deflects upward to the obtuse angle of the first photovoltaic panel 10.

[0029] A drive mechanism is provided between the second display rack 4 and the fourth display rack 9. As the second display rack 4 moves back and forth along the bottom surface of the base frame 1, the drive mechanism drives the third photovoltaic panel 12 to rotate back and forth relative to the first photovoltaic panel 10. The drive mechanism comprises a rack 14 fixed to the outer wall of the second display rack 4 and a gear 15 fixed to the outer end of the second hinge shaft 8. Gear 15 is located in the path of the back and forth movement of rack 14. As the second display rack 4 moves forward along the bottom surface of the first display rack 2, not only does it cause the second photovoltaic panel 11 to enter the bottom surface of the first display rack 2, pushing the third display rack 7 downward. Furthermore, when the rack 14 moves into engagement with gear 15, gear 15 drives the second hinge shaft 8, which in turn drives the fourth display rack 9 to rotate toward the first photovoltaic panel 10.

[0030] A servo motor 16 is installed on the first display frame 2 , and an actuating shaft of the servo motor 16 is connected to the screw 3 . A controller and a sensor electrically connected to the servo motor 16 are provided on the base frame 1 .

[0031] In normal weather, the second display rack 4 is located behind the first display rack 2, while the third display rack 7 and the fourth display rack 9 are located behind the first display rack 2. Figure 1In the position shown, the third display rack 7 and the fourth display rack 9 are displayed on either side of the first display rack 2 in a deflected upward manner. In other words, the second photovoltaic panel 11 and the third photovoltaic panel 12 are displayed on either side of the first photovoltaic panel 10 in a deflected upward manner. The second photovoltaic panel 11, the third photovoltaic panel 12 and the first photovoltaic panel 10 together form a light energy absorption area, which increases the photovoltaic area and improves the conversion efficiency when converting electrical energy to the converter. Moreover, unlike conventional multi-panel photovoltaic panels, the second photovoltaic panel 11 and the third photovoltaic panel 12 are displayed at an obtuse angle on either side of the first photovoltaic panel 10. Therefore, when light strikes the three photovoltaic panels, it can be refracted back to the photovoltaic surface of each other, thereby enhancing the utilization rate of light energy. In addition, when strong winds occur suddenly, the strong wind signal is sensed by the sensor and fed back to the controller, which instructs the servo motor 16 to energize and drive the screw 3 to rotate. The transmission base 5 moves linearly along the screw 3, and the transmission base 5 drives the second display rack 4 to move along the bottom surface of the first display rack 2. The second display rack 4 drives the first hinge shaft 6 to move forward, and the first hinge shaft 6 drives the third display rack 7 to move forward. When the rotating end of the third display rack 7 enters the bottom surface of the first display rack 2 and continues to move forward, it is squeezed by the bottom surface of the first display rack 2 and deflected downward into the second display rack 4. The third display rack 7 drives the second photovoltaic panel 11 to the third display rack 7. In the second display rack 4, the gas spring 13 folds and contracts, and the second display rack 4 continues to advance along the bottom surface of the first display rack 2. The top surface of the second photovoltaic panel 11 continues to slide forward along the bottom surface of the first display rack 2. When the front end of the second display rack 4 advances to coincide with the front end of the first display rack 2, the servo motor 16 is automatically powered off under the control of the controller, the screw 3 stops rotating, the transmission base 5 stops advancing, and the second display rack 4 stops advancing. At this time, the second photovoltaic panel 11 is stored on the bottom surface of the first display rack 2, which is equivalent to automatically releasing the rear photovoltaic area of the first photovoltaic panel 10. When strong winds hit, the rear photovoltaic area will not generate wind resistance, and the wind resistance is strong.

[0032] Continuing from the above, when strong winds strike, not only does the second photovoltaic panel 11 automatically retreat to the underside of the first display stand 2 for protection, but when the second display stand 4 advances (when retreating to the underside of the first display stand 2), it also advances with the rack 14. When the rack 14 advances and engages with the gear 15, it causes the gear 15 to rotate clockwise. The gear 15 then rotates the second hinge shaft 8 clockwise, which in turn rotates the fourth display stand 9 clockwise. The fourth display stand 9 then rotates the third photovoltaic panel 12 clockwise, snapping the photovoltaic surface onto the first photovoltaic panel 10, effectively aligning the photovoltaic surfaces of the first and third photovoltaic panels 10, 12. This automatically reduces the photovoltaic area in front of the first photovoltaic panel 10 during strong winds, eliminating wind resistance and further enhancing wind resistance. In summary, this not only improves light energy absorption, but also eliminates the additional wind resistance caused by the increased photovoltaic area.

[0033] like Figure 1、 Figure 2 As shown, a slider 25 is fixed to the rear side of the top surface of the third display rack 7. Slider 25 defines a sliding cavity 26. Slider 25 and screw 3 are aligned, and a rounded corner 27 is defined at the rear end of the top of sliding cavity 26. When the third display rack 7 is folded into the second display rack 4, the gas spring 13 compresses and shortens, and as it moves forward with the second display rack 4 toward the bottom surface of the first display rack 2, slider 25 also moves forward. The rounded corner 27 at the top of slider 25 moves along the bottom surface of the first photovoltaic panel 10, and sliding cavity 26 moves along the screw 3.

[0034] like Figures 1 to 5 As shown, a first pull plate 17 is fixed to the second hinge shaft 8, and a second pull plate 18 is fixed to the front end of the first display rack 2. The second pull plate 18 is located in front of the first pull plate 17. A return spring 19 is connected to the first pull plate 17, and the other end of the return spring 19 is connected to the second pull plate 18. A limit plate 20 is fixed to the front end of the first display rack 2. The limit plate 20 extends upward and is installed with a rubber plate 21. The fourth display rack 9 rests on the rubber plate 21. When the strong wind ends, the sensor sends a signal to the controller, energizing the servo motor 16 and driving the screw 3 to rotate in the opposite direction. The transmission base 5 slides backward along the screw 3, and the transmission base 5 drives the second display rack 4 to slide backward, and the second display rack 4 and all the components on it to slide backward. When the third display rack 7 slides backward and separates from the first display rack 2, the gas spring 13 automatically releases its length and pushes the third display rack 7 to rotate upward. The third display rack 7 and the second photovoltaic panel 11 rotate upward to an obtuse angle relative to the first photovoltaic panel 10. At the same time, the rack 14 moves backward and away from the gear 15. The meshing force on the gear 15 disappears, and the clockwise rotation force on the second hinge shaft 8 disappears. The return spring 19 rebounds forward and uses the first pull plate 17 to drag the second hinge shaft 8 to rotate counterclockwise. The second hinge shaft 8 drives the fourth display rack 9 to rotate upward, and the fourth display rack 9 rotates the third photovoltaic panel 12 to an obtuse angle relative to the first photovoltaic panel 10. At this time, the entire photovoltaic installation returns to its original state. Figure 1 The high-efficiency, large-area light energy absorption state is shown.

[0035] First display rack 2 has interconnecting first exhaust holes 22 on its left and right sides, and second display rack 4 has interconnecting second exhaust holes 23 on its left and right sides. A connecting exhaust duct 24 is provided between base frame 1 and first display rack 2. Air entering from the sides is released through first exhaust holes 22, second exhaust holes 23, and exhaust duct 24, reducing wind resistance and improving wind resistance.

[0036] like Figure 1 、 Figure 4As shown, the second photovoltaic panel 11 and the third photovoltaic panel 12 are both rectangular. A reflector 28 is mounted on each of the four corners of the photovoltaic surface of the second photovoltaic panel 11 and the third photovoltaic panel 12. The reflector 28 on the second photovoltaic panel 11 is tilted toward the photovoltaic surface of the first photovoltaic panel 10, and the reflector 28 on the third photovoltaic panel 12 is tilted toward the photovoltaic surface of the first photovoltaic panel 10. Part of the light that strikes the second photovoltaic panel 11 and the third photovoltaic panel 12 is refracted by the reflector 28 and then reflected back to the first photovoltaic panel 10, shortening the refraction distance and improving the utilization rate of the light energy reflected to the first photovoltaic panel 10.

[0037] A rubber strip is provided between the top surface of the second display rack 4 and the bottom surface of the first display rack 2. The top surface of the second display rack 4 slides on the bottom surface of the first display rack 2 via the rubber strip. When the second display rack 4 is stored toward the bottom surface of the first display rack 2, it not only has good sliding performance but also moves smoothly.

[0038] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described based on their actual installation and actual use, as well as the customary orientations of those skilled in the art. This is hereby explained.

[0039] The specific embodiments described above further illustrate the purpose of the present invention, technical solutions, and beneficial effects. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In particular, it should be noted that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solar photovoltaic device, characterized in that: The invention comprises a base frame (1), a first display frame (2) tilted forward and backward is installed on the top of the base frame (1), a screw rod (3) is installed on the first display frame (2), the front end of the screw rod (3) is installed on the front end of the first display frame (2) through a bearing, and the rear end of the screw rod (3) is installed on the rear end of the first display frame (2) through a bearing, a second display frame (4) is provided on the bottom surface of the base frame (1), a transmission seat (5) is installed on the screw rod (3), and the transmission seat (5) is fixed on the front end of the second display frame (4) The top surface of the second display frame (4) slides on the bottom surface of the first display frame (2). When the screw (3) rotates forward and reverse, the transmission seat (5) brings the second display frame (4) to move back and forth along the bottom surface of the first display frame (2). The second display frame (4) is equipped with a first hinge shaft (6). The first hinge shaft (6) is close to the front end of the second display frame (4). The third display frame (7) is equipped with the first hinge shaft (6). The top front end of the first display frame (2) is equipped with a second hinge shaft (8). The second A fourth display rack (9) tilted forward and upward is connected to the hinge shaft (8); a first photovoltaic panel (10) is installed on the top surface of the first display rack (2); a second photovoltaic panel (11) is installed on the top surface of the third display rack (7); a third photovoltaic panel (12) is installed on the top surface of the fourth display rack (9); the third photovoltaic panel (12) forms an obtuse angle with the first photovoltaic panel (10); a gas spring (13) is connected between the bottom of the third display rack (7) and the rear end of the second display rack (4); When the frame (4) moves to the rear side, the action rod of the gas spring (13) releases its length toward the bottom surface of the third display frame (7), and the third display frame (7) brings the second photovoltaic panel (11) to deflect upward to an obtuse angle of the first photovoltaic panel (10); a driving mechanism is provided between the second display frame (4) and the fourth display frame (9), and when the second display frame (4) moves forward and backward along the bottom surface of the base frame (1), the driving mechanism drives the third photovoltaic panel (12) to rotate forward and backward relative to the first photovoltaic panel (10).

2. The solar photovoltaic device according to claim 1, characterized in that: The driving mechanism includes a rack (14) fixed on the outer wall surface of the second display rack (4), and also includes a gear (15) fixed on the outer end of the second hinge shaft (8). The gear (15) is located on the path of the rack (14) moving forward and backward. When the second display rack (4) moves forward along the bottom surface of the first display rack (2), not only does it cause the second photovoltaic panel (11) to enter the bottom surface of the first display rack (2) and push the third display rack (7) to deflect downward, but also when the rack (14) moves to engage with the gear (15), the gear (15) drives the second hinge shaft (8), and the second hinge shaft (8) drives the fourth display rack (9) to rotate toward the first photovoltaic panel (10).

3. The solar photovoltaic device according to claim 1, characterized in that: A slider (25) is fixed to the rear side of the top surface of the third display rack (7), and a sliding cavity (26) is provided on the slider (25). The slider (25) and the screw (3) are in the same straight line, and a rounded corner (27) is provided on the rear side of the top end of the sliding cavity (26).

4. The solar photovoltaic device according to claim 3, characterized in that: A servo motor (16) is installed on the first display frame (2), an action shaft of the servo motor (16) is connected to the screw (3), and a controller and a sensor electrically connected to the servo motor (16) are provided on the base frame (1).

5. The solar photovoltaic device according to claim 4, characterized in that: A rubber strip is provided between the top surface of the second display rack (4) and the bottom surface of the first display rack (2), and the top surface of the second display rack (4) slides on the bottom surface of the first display rack (2) via the rubber strip.

6. The solar photovoltaic device according to claim 5, characterized in that: A first pull plate (17) is fixed on the second hinge shaft (8), a second pull plate (18) is fixed on the front end of the first display frame (2), the second pull plate (18) is located in front of the first pull plate (17), a return spring (19) is connected to the first pull plate (17), the other end of the return spring (19) is connected to the second pull plate (18), a limit plate (20) is fixed on the front end of the first display frame (2), the limit plate (20) extends upward and is installed with a rubber plate (21), and the fourth display frame (9) rests on the rubber plate (21).

7. The solar photovoltaic device according to claim 6, characterized in that: The first display rack (2) is provided with first exhaust holes (22) on both sides thereof, the second display rack (4) is provided with second exhaust holes (23) on both sides thereof, and an exhaust passage (24) is provided between the bottom rack (1) and the first display rack (2).

8. The solar photovoltaic device according to claim 7, characterized in that: The second photovoltaic panel (11) and the third photovoltaic panel (12) are both rectangular. A reflector (28) is installed on each of the four corners of the photovoltaic surface of the second photovoltaic panel (11) and the third photovoltaic panel (12). The reflector (28) on the second photovoltaic panel (11) is tilted toward the photovoltaic surface of the first photovoltaic panel (10), and the reflector (28) on the third photovoltaic panel (12) is tilted toward the photovoltaic surface of the first photovoltaic panel (10).

Images