Roof photovoltaic panel convenient for photo-thermal utilization
By designing a combination of motor-driven protective cloth and brush plate fans on the roof photovoltaic panel, the problem of impurities accumulation on the surface of the photovoltaic panel is solved, the service life is extended, and the power generation efficiency and economy are improved.
Patent Information
- Application Number
- CN202411666253.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During long-term use of roof photovoltaic panels, impurities such as bird feces and fallen leaves will accumulate on the surface, resulting in a decrease in the power generation efficiency and shortening of the service life of the photovoltaic panels, which increases the workload of maintenance and maintenance.
A roof photovoltaic panel including motor, protection component and soot blowing component was designed. The protective cloth was driven by the motor to drive the movable panel to spread the protective cloth. The protective cloth protected the photovoltaic sheet at night to prevent impurities from falling; at the same time, the brush plate and the fan were combined to remove it. The dust on the surface of the photovoltaic sheet ensures the normal operation of the photovoltaic panel.
It effectively prevents the corrosion of impurities such as bird feces and fallen leaves on the photovoltaic panels, extends the service life of the photovoltaic panels, improves the efficiency and economicality of photovoltaic power generation, and reduces the workload of maintenance and maintenance.
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Figure CN119448910A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of photovoltaic panels, and in particular to a roof photovoltaic panel that is convenient for utilizing light and heat. Background Art
[0002] Photothermal energy can be used by using solar photovoltaic panels to convert solar energy into electrical energy, and then transmit the electrical energy to the required location. Photothermal energy is renewable and environmentally friendly, and at the same time has good economy and flexibility. Therefore, photothermal energy is used in various fields, benefiting thousands of households. In the daily life of residents, photovoltaic panels can also be installed on the roof. When the roof photovoltaic panels are working, residents can achieve self-sufficiency in electricity in their daily life, which not only saves electricity bills but also achieves low emissions. When the roof photovoltaic panels are used for a long time, impurities such as bird droppings and fallen leaves will accumulate on the surface. These impurities are corrosive to the panel body, which will affect the overall service life of the photovoltaic panel and increase the workload of users for maintenance and repair.
[0003] In order to overcome the above-mentioned defects, prior art 1 (Chinese patent with application number CN202410661514.5 and application date of 2024-05-27) is a bird-protective photovoltaic panel, which can reduce the obstruction to the light of the photovoltaic panel by preventing birds from staying on the photovoltaic panel and reducing the coverage of bird droppings, thereby improving the power generation efficiency of the photovoltaic panel. Bird droppings contain acidic substances, which will corrode the surface if covered on the photovoltaic panel for a long time, reducing the life and power generation performance of the photovoltaic panel. By reducing the pollution of bird droppings, it helps to extend the service life of the photovoltaic panel. Due to the influence of bird droppings and bird staying on the power generation efficiency of the photovoltaic panel, it will cause economic losses. The present invention can reduce economic losses and improve the economy of photovoltaic power generation by reducing such influence.
[0004] Prior art 2 (Chinese patent with application number CN202210280104.7 and application date 2022-03-22) is a recyclable and protective photovoltaic panel, which uses a driving motor as a driving force to rotate the rotating plate and contact the connecting frame. The connecting frame can shield the photovoltaic panel body to prevent the photovoltaic panel body from being damaged during transportation, and at the same time can block dust from floating on the photovoltaic panel body.
[0005] When protecting the photovoltaic panels, it is also necessary to clean impurities such as fallen leaves in a timely manner. However, during use, the device in the above application is not enough to clean the impurities on the photovoltaic panels only through the protective components set up. The accumulation of these impurities will not only affect the service life of the photovoltaic panels, but also affect the subsequent work efficiency of the photovoltaic panels.
[0006] In response to the above problems, it is urgently necessary to carry out innovative designs based on the original rooftop photovoltaic panels. Summary of the invention
[0007] The purpose of the present invention is to provide a roof photovoltaic panel that is convenient for light and heat utilization, so as to solve the problem of impurity accumulation mentioned in the above background technology, which not only affects the service life of the photovoltaic panel, but also affects the subsequent working efficiency of the photovoltaic panel.
[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rooftop photovoltaic panel that is convenient for light and heat utilization, comprising a panel body, a photovoltaic sheet is fixedly connected inside the panel body, a No. 1 panel is fixedly connected to the left upper surface of the panel body, and a No. 2 panel is fixedly connected to the right upper surface of the panel body; it also includes a motor, a protection assembly and a sootblowing assembly, the motor is bolted to the surface of the No. 1 panel, and a long pin is fixedly connected to the output end of the motor, and a movable plate is threadedly connected to the surface of the long pin, and a dust cleaning assembly for sweeping dust is arranged between the movable plate and the panel body, the dust cleaning assembly includes a brush plate movably arranged on the surface of the movable plate; the protection assembly is arranged on the upper surface of the panel body, and the protection assembly includes an outer box fixedly connected to the upper surface of the panel body, and a connecting shaft is rotatably arranged inside the outer box, and a protective cloth is wound and fixedly connected to the surface of the connecting shaft; the sootblowing assembly includes a connecting plate fixedly connected to the surface of the movable plate, and an inner rod is rotatably arranged inside the connecting plate, and a fan is fixedly connected to the end of the inner rod.
[0009] Preferably, the protection component also includes a limit rod fixedly connected to the inner wall of the second plate, and the limit rod passes through the interior of the movable plate, and the left side surface of the movable plate is fixedly connected to a protective cloth on the surface of the connecting shaft, and the movable plate and the limit rod are slidably connected.
[0010] Preferably, a torsion spring having an elastic reset function is fixedly connected to the surface of the connecting shaft, and the other side of the torsion spring is fixedly connected to the inner wall of the outer box.
[0011] Preferably, the dust cleaning assembly further comprises an auxiliary plate fixedly connected to the upper surface of the plate body, and an auxiliary block is fixedly connected to the surface of the auxiliary plate, and an external connecting rod is fixedly connected to the left surface of the brush plate.
[0012] Preferably, both left and right side surfaces of the auxiliary block are inclined, and the auxiliary blocks are distributed at equal intervals on the surface of the auxiliary plate, and a latch is fixedly connected to the surface of the brush plate.
[0013] Preferably, the right side surface of the movable plate is concave, and a guide rod is fixedly connected to the inner wall of the movable plate, and a sliding block is sleeved and connected to the surface of the guide rod.
[0014] Preferably, a connection spring having an elastic reset function is fixedly connected to the surface of the slider, and the other side of the connection spring is fixedly connected to the inner wall of the movable plate. A mounting hole corresponding to the latch is provided on the surface of the slider.
[0015] Preferably, the sootblowing assembly further comprises a rack fixedly connected to the upper surface of the plate body, a rotating shaft is rotatably arranged inside the connecting plate, and a gear meshing with the rack is fixedly connected to the surface of the rotating shaft.
[0016] Preferably, a pulley is sleeved and connected to the surface of the rotating shaft, and the other side of the pulley is sleeved and connected to the surface of the inner rod.
[0017] Preferably, the fans are symmetrically distributed about the center of the plate body, and the blowing directions of the fans on both sides are opposite.
[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: when the present invention is working normally, the protective cloth is in a rolled-up state, at which time the photovoltaic sheet can work normally, and at night, the motor works, and the motor drives the protection component to work, and the protective cloth is driven to unfold by the movable plate, and then the protective cloth covers the photovoltaic sheet, which plays a role in preventing rain, dust and falling leaves, and when the protection component is working, the movable plate drives the brush plate to move synchronously, and at the same time the brush plate makes a reciprocating linear motion in the horizontal direction, and then the brush plate can clean the dust on the surface of the photovoltaic sheet, so that the dust is lifted, and at the same time the fan rotates under the action of the gear and the rack, and when the fan rotates, the dust can be blown away, so that the photovoltaic sheet can better utilize light and heat, and the working efficiency of the photovoltaic sheet is improved. The specific contents are as follows: (1) During the operation of the photovoltaic panel of the present invention, the movable plate is located close to the outer box, and the protective cloth is in a rolled-up state, so that the photovoltaic panel can work normally without affecting the conventional light and heat utilization.
[0019] Furthermore, the upper surface of the plate body is fixedly connected to an induction controller, which can distinguish between day and night. At night, the induction controller starts the motor, and the motor works at this time, and then the motor drives the long pin to rotate. When the long pin rotates, the movable plate moves to the right side of the plate body under the action of the limit rod, and finally the protective cloth is unfolded to protect the photovoltaic panel and prevent impurities from falling on the photovoltaic panel.
[0020] Furthermore, when the protective cloth is unfolded, the connecting shaft will be pulled by the protective cloth, and then the connecting shaft will rotate inside the outer box. When the connecting shaft rotates, the torsion spring will be stretched. During the day, the sensing controller starts the motor to make the motor rotate. At this time, the movable plate moves closer to the inside of the outer box. At this time, the connecting shaft will lose tension, and the connecting shaft will rotate, and then the connecting shaft will reel in the protective cloth for the next use.
[0021] (2) When the movable plate of the present invention moves, the movable plate drives the brush plate to move synchronously. When the brush plate moves, it drives the external rod to move. When the external rod moves to contact the auxiliary block, the external rod and the brush plate will be pushed. At this time, the brush plate and the slider will slide, and the connecting spring will be squeezed. When the external rod moves to no longer contact the auxiliary block, the brush plate, the external rod and the slider will return to their original positions under the action of the connecting spring. The above process is repeated, and the brush plate makes reciprocating linear motion in the horizontal direction. At this time, the dust will be swept up to prevent the dust from adhering to the photovoltaic panel.
[0022] Furthermore, during the movement of the slider, the guide rod makes the slider move only in the horizontal direction, and the slider will not fall. After working for a long time, the brush plate needs to be removed and cleaned. At this time, the brush plate can be directly pulled out to move the end of the pin out of the mounting hole. After cleaning the brush plate, the pin can be inserted into the mounting hole. This ensures the working efficiency of the brush plate.
[0023] Furthermore, during the day, the motor rotates, the movable plate moves back, and when the photovoltaic panel works again, the brush plate will again make reciprocating linear motion in the horizontal direction. At this time, the brush plate will again clean the photovoltaic panel, so that the photovoltaic panel can be better put into use on the day.
[0024] (3) When the movable plate of the present invention moves, the movable plate drives the connecting plate to move synchronously. When the connecting plate moves, it drives the gear to move synchronously. At this time, the gear and the rotating shaft rotate under the action of the rack. When the rotating shaft rotates, the inner rod is driven to rotate through the pulley. When the inner rod rotates, it drives the fan to rotate synchronously. The blowing directions of the fans on both sides are opposite, that is, one side of the fan blows air and the other side sucks air, so that the dust blown up by the brush plate can be quickly cleaned and will not stay on the photovoltaic panel.
[0025] Furthermore, when the movable plate moves back, the connecting plate and the fan also move back, and the fans on both sides of the plate body will reverse, and then the fans will play the role of blowing away dust again. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the connection structure between the plate body and the auxiliary plate of the present invention; Figure 2 This is a schematic diagram of the connection structure between the first board and the motor of the present invention; Figure 3 This is a schematic diagram of the connection structure between the movable plate and the slider of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the auxiliary block distribution structure of the present invention; Figure 6This is a schematic diagram of the brush plate and latch connection structure of the present invention; Figure 7 This is a schematic diagram of the connecting structure of the guide rod and the slider of the present invention; Figure 8 It is a schematic diagram of the meshing connection structure of the gear and the rack of the present invention; Fig. 9 It is a schematic diagram of the connection structure between the inner rod and the fan of the present invention.
[0027] In the figure: 1. plate body; 2. photovoltaic panel; 3. plate No. 1; 4. plate No. 2; 5. motor; 6. limit rod; 7. long pin; 8. movable plate; 9. outer box; 10. connecting shaft; 11. torsion spring; 12. brush plate; 13. guide rod; 14. slider; 15. connecting spring; 16. auxiliary plate; 17. auxiliary block; 18. external rod; 19. latch; 20. mounting hole; 21. connecting plate; 22. rotating shaft; 23. gear; 24. rack; 25. inner rod; 26. pulley; 27. fan. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] Embodiment 1: By setting up the protection component, the protective cloth can be unfolded at night, so that the photovoltaic sheet 2 can be well protected when it is not working at night, and no impurities will fall on the photovoltaic sheet 2 at night. Figure 1-Figure 2 As shown: it includes a plate body 1, a photovoltaic sheet 2 is fixedly connected inside the plate body 1, a No. 1 plate 3 is fixedly connected to the left upper surface of the plate body 1, and a No. 2 plate 4 is fixedly connected to the right upper surface of the plate body 1; it also includes a motor 5, a protection component and a soot blowing component, the motor 5 is bolted to the surface of the No. 1 plate 3, and the output end of the motor 5 is fixedly connected to a long pin 7, and the surface of the long pin 7 is threadedly connected to a movable plate 8, and a dust cleaning component for sweeping dust is arranged between the movable plate 8 and the plate body 1, and the dust cleaning component includes a brush plate 12 movably arranged on the surface of the movable plate 8. The protection component is arranged on the upper surface of the plate body 1, and the protection component includes an outer box 9 fixedly connected to the upper surface of the plate body 1, and a connecting shaft 10 is rotatably arranged inside the outer box 9, and a protective cloth is wound and fixedly connected to the surface of the connecting shaft 10. The soot blowing component includes a connecting plate 21 fixedly connected to the surface of the movable plate 8, and an inner rod 25 is rotatably arranged inside the connecting plate 21, and a fan 27 is fixedly connected to the end of the inner rod 25.
[0030] The protection component also includes a limit rod 6 fixedly connected to the inner wall of the second plate 4, and the limit rod 6 passes through the interior of the movable plate 8, and the left surface of the movable plate 8 is fixedly connected to the protective cloth on the surface of the connecting shaft 10, the movable plate 8 and the limit rod 6 are slidably connected, and the surface of the connecting shaft 10 is fixedly connected to a torsion spring 11 which plays an elastic reset role, and the other side of the torsion spring 11 is fixedly connected to the inner wall of the outer box 9.
[0031] During the operation of the photovoltaic sheet 2, the movable plate 8 is located close to the outer box 9. At this time, the protective cloth is in a rolled-up state, so that the photovoltaic sheet 2 can work normally and will not affect the conventional light and heat utilization. The upper surface of the plate body 1 is fixedly connected with the induction controller, which can distinguish between day and night. At night, the induction controller starts the motor 5 on the surface of the first plate 3. At this time, the motor 5 works, and then the motor 5 drives the long pin 7 to rotate. The long pin 7 is threadedly connected to the movable plate 8. Therefore, when the long pin 7 rotates, the movable plate 8 moves toward the plate body under the action of the limit rod 6. 1 moves to the right side, and finally the protective cloth is unfolded to protect the photovoltaic panel 2 and prevent impurities from falling on the photovoltaic panel 2. When the protective cloth is unfolded, the connecting shaft 10 will be pulled by the protective cloth, and then the connecting shaft 10 will rotate inside the outer box 9. When the connecting shaft 10 rotates, the torsion spring 11 will be stretched. During the day, the induction controller starts the motor 5 to rotate the motor 5. At this time, the movable plate 8 moves toward the inside of the outer box 9. At this time, the connecting shaft 10 will lose the tension. At this time, the connecting shaft 10 rotates, and then the connecting shaft 10 will roll up the protective cloth for the next use.
[0032] Embodiment 2: Different from Embodiment 1, by setting a dust cleaning component, the dust on the surface of the photovoltaic sheet 2 can be cleaned. Figure 3-Figure 7 As shown: the cleaning component also includes an auxiliary plate 16 fixedly connected to the upper surface of the plate body 1, and an auxiliary block 17 is fixedly connected to the surface of the auxiliary plate 16, an external rod 18 is fixedly connected to the left surface of the brush plate 12, the left and right side surfaces of the auxiliary block 17 are inclined, and the auxiliary blocks 17 are evenly spaced on the surface of the auxiliary plate 16, and a pin 19 is fixedly connected to the surface of the brush plate 12.
[0033] The right side surface of the movable plate 8 is concave, and a guide rod 13 is fixedly connected to the inner wall of the movable plate 8, and a slider 14 is sleeved on the surface of the guide rod 13, and a connecting spring 15 that plays an elastic reset role is fixedly connected to the surface of the slider 14, and the other side of the connecting spring 15 is fixedly connected to the inner wall of the movable plate 8, and a mounting hole 20 corresponding to the pin 19 is opened on the surface of the slider 14.
[0034] When the movable plate 8 moves, the movable plate 8 drives the brush plate 12 to move synchronously. When the brush plate 12 moves, it will drive the external rod 18 to move. When the external rod 18 moves to contact with the auxiliary block 17, the external rod 18 and the brush plate 12 will be pushed. At this time, the brush plate 12 and the slider 14 will slide, and the connecting spring 15 will be squeezed. When the external rod 18 moves to no longer contact with the auxiliary block 17, the brush plate 12, the external rod 18 and the slider 14 will return to their original positions under the action of the connecting spring 15. The above process is repeated. The brush plate 12 makes a reciprocating linear motion in the horizontal direction. At this time, the dust will be swept up and the dust will not be adhered to the photovoltaic panel 2. During the movement of the slider 14, the guide rod 13 makes The slider 14 only moves in the horizontal direction, and the slider 14 will not fall. After working for a long time, the brush plate 12 needs to be removed and cleaned. At this time, the brush plate 12 can be directly pulled out to move the end of the pin 19 out of the mounting hole 20. After cleaning the brush plate 12, the pin 19 can be inserted into the mounting hole 20. This ensures the working efficiency of the brush plate 12. During the day, the motor 5 rotates and the movable plate 8 moves back. When the photovoltaic panel 2 works again, the brush plate 12 will make reciprocating linear motion in the horizontal direction again. At this time, the brush plate 12 will clean the photovoltaic panel 2 again, so that the photovoltaic panel 2 can be better put into use on the day.
[0035] Embodiment 3: Different from Embodiment 2, by providing a soot blowing assembly, the soot cleaned by the brush plate 12 can be blown away from the photovoltaic panel 2, so that the photovoltaic panel 2 can work better. Figure 8 and Fig. 9 As shown: the sootblowing assembly also includes a rack 24 fixedly connected to the upper surface of the plate body 1, a rotating shaft 22 is rotatably arranged inside the connecting plate 21, and a gear 23 meshing with the rack 24 is fixedly connected to the surface of the rotating shaft 22, a pulley 26 is sleeved on the surface of the rotating shaft 22, and the other side of the pulley 26 is sleeved on the surface of the inner rod 25, and the fans 27 are symmetrically distributed about the center of the plate body 1, and the blowing directions of the fans 27 on both sides are opposite.
[0036] When the movable plate 8 moves, the movable plate 8 drives the connecting plate 21 to move synchronously. When the connecting plate 21 moves, it drives the gear 23 to move synchronously. At this time, the gear 23 and the rotating shaft 22 rotate under the action of the rack 24. When the rotating shaft 22 rotates, the inner rod 25 is driven to rotate through the pulley 26. When the inner rod 25 rotates, it drives the fan 27 to rotate synchronously, and the blowing directions of the fans 27 on both sides are opposite, that is, the fan 27 on one side blows air and the fan 27 on the other side sucks air, so that the dust blown up by the brush plate 12 is quickly cleaned and will not stay on the photovoltaic panel 2. When the movable plate 8 moves back, the connecting plate 21 and the fan 27 also move back. At this time, the fans 27 on both sides of the plate body 1 will reverse, and then the fans 27 will play the role of blowing away the dust again.
[0037] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.
Claims
1. A rooftop photovoltaic panel for facilitating light and heat utilization, comprising a panel body (1), a photovoltaic sheet (2) being fixedly connected inside the panel body (1), a first panel (3) being fixedly connected to the left upper surface of the panel body (1), and a second panel (4) being fixedly connected to the right upper surface of the panel body (1); characterized in that: It also includes a motor (5), a protection component and a soot blowing component, wherein the motor (5) is bolted to the surface of the first plate (3), and the output end of the motor (5) is fixedly connected to a long pin (7), and the surface of the long pin (7) is threadedly connected to a movable plate (8), and a dust cleaning component for sweeping dust is arranged between the movable plate (8) and the plate body (1), and the dust cleaning component includes a brush plate (12) movably arranged on the surface of the movable plate (8); the protection component is arranged on the upper surface of the plate body (1), and the protection component includes an outer box (9) fixedly connected to the upper surface of the plate body (1), and a connecting shaft (10) is rotatably arranged inside the outer box (9), and a protective cloth is wound and fixedly connected to the surface of the connecting shaft (10); the soot blowing component includes a connecting plate (21) fixedly connected to the surface of the movable plate (8), and an inner rod (25) is rotatably arranged inside the connecting plate (21), and a fan (27) is fixedly connected to the end of the inner rod (25).
2. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 1, characterized in that: The protection assembly further comprises a limit rod (6) fixedly connected to the inner wall of the second plate (4), and the limit rod (6) passes through the interior of the movable plate (8), and a protective cloth on the surface of the connecting shaft (10) is fixedly connected to the left surface of the movable plate (8), and the movable plate (8) and the limit rod (6) are slidably connected.
3. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 1, characterized in that: A torsion spring (11) having an elastic reset function is fixedly connected to the surface of the connecting shaft (10), and the other side of the torsion spring (11) is fixedly connected to the inner wall of the outer box (9).
4. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 1, characterized in that: The dust cleaning component also includes an auxiliary plate (16) fixedly connected to the upper surface of the plate body (1), and an auxiliary block (17) is fixedly connected to the surface of the auxiliary plate (16), and an external connecting rod (18) is fixedly connected to the left surface of the brush plate (12).
5. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 4, characterized in that: The left and right side surfaces of the auxiliary blocks (17) are both inclined, and the auxiliary blocks (17) are distributed at equal intervals on the surface of the auxiliary plate (16), and a latch (19) is fixedly connected to the surface of the brush plate (12).
6. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 5, characterized in that: The right side surface of the movable plate (8) is concave, and a guide rod (13) is fixedly connected to the inner wall of the movable plate (8), and a sliding block (14) is sleeved and connected to the surface of the guide rod (13).
7. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 6, characterized in that: A connection spring (15) having an elastic reset function is fixedly connected to the surface of the slider (14), and the other side of the connection spring (15) is fixedly connected to the inner wall of the movable plate (8). A mounting hole (20) corresponding to the latch (19) is provided on the surface of the slider (14).
8. The rooftop photovoltaic panel for facilitating light and heat utilization according to claim 1, characterized in that: The sootblowing assembly further comprises a rack (24) fixedly connected to the upper surface of the plate body (1); a rotating shaft (22) is rotatably arranged inside the connecting plate (21); and a gear (23) meshing with the rack (24) is fixedly connected to the surface of the rotating shaft (22).
9. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 8, characterized in that: A belt pulley (26) is sleeved and connected to the surface of the rotating shaft (22), and the other side of the belt pulley (26) is sleeved and connected to the surface of the inner rod (25).
10. A rooftop photovoltaic panel for facilitating light and heat utilization according to claim 1, characterized in that: The fans (27) are symmetrically distributed about the center of the plate body (1), and the blowing directions of the fans (27) on both sides are opposite.
Citation Information
Patent Citations
Recyclable protective photovoltaic panel
CN114726304A
Bird-preventing photovoltaic panel
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Self-folding mobile photovoltaic energy storage charger
CN118631136A