A self-cleaning structure for solar photovoltaic panels

Abstract

This utility model relates to the field of solar photovoltaic panel technology, and in particular to a self-cleaning structure for solar photovoltaic panels. It includes a photovoltaic panel frame, with a wiping and cleaning component mounted on the bottom surface of the cleaning frame. The wiping and cleaning component includes a wiping seat fixedly installed on the bottom surface of the cleaning frame, and a wiping element slidably installed inside the wiping seat. Both the cleaning drive component and the wiping and cleaning component contain a cleaning component, which includes an expansion water pipe fixedly installed inside the wiping seat. This utility model precisely controls the wiping pressure through water pressure, adapting to different types of stains. For light dust, the water pump power can be reduced to decrease the water output, causing the expansion water pipe to expand slightly, allowing the wiping element to clean with low pressure and avoid excessive friction. For stubborn stains such as bird droppings or dried mud, the water pressure is increased to fully expand the expansion water pipe, allowing the wiping element to adhere to the surface with high pressure, enhancing the cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of solar photovoltaic panel technology, and in particular to a self-cleaning structure for solar photovoltaic panels. Background Technology

[0002] A self-cleaning structure for solar photovoltaic (PV) panels is a device or design that can automatically remove dust, dirt, snow, and other debris from the surface of PV panels. Its core purpose is to maintain the photoelectric conversion efficiency of the PV panels. If impurities accumulate on the surface of PV panels, they will block sunlight, leading to a significant decrease in power generation efficiency (studies have shown that severe dust accumulation can reduce efficiency by more than 20%). Therefore, self-cleaning structures have important practical value in photovoltaic systems.

[0003] A search revealed a photovoltaic panel self-cleaning device based on light-sensing recognition, with application number 202321239889.X. The device features a small water pump that sprays liquid from a cleaning tank through nozzles, thus self-cleaning the surface of the photovoltaic panel. Simultaneously, a drive motor moves a support rod and brushes, allowing the brushes to scrub away dust from the photovoltaic panel, ensuring its self-cleaning effect.

[0004] When using the above-mentioned technical solution, the surface of the photovoltaic panel is cleaned by simply moving the brush bristles. However, when cleaning the surface of the photovoltaic panel, stubborn stains such as bird droppings, tree sap, oil stains, and dried mud stains are difficult to remove completely by brush bristle friction alone. Especially when the stains have hardened or have strong adhesion, the mechanical action of the brush bristles may only remove surface dust and leave residual marks. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cleaning structure for solar photovoltaic panels. By precisely controlling the wiping pressure through water pressure, it can adapt to different types of stains. When dealing with light dust, the water output can be reduced by lowering the water pump power, causing the expansion tube to expand slightly. The wiping component then completes the cleaning with low pressure, avoiding excessive friction. When encountering stubborn stains such as bird droppings or dried mud, the water pressure can be increased to fully expand the expansion tube, allowing the wiping component to adhere to the surface with high pressure, thus enhancing the cleaning effect and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning structure for a solar photovoltaic panel, comprising a photovoltaic panel frame, wherein a support auxiliary component is provided at the upper end of the photovoltaic panel frame, and the support auxiliary component includes an assembly plate rotatably mounted on the upper surface of the photovoltaic panel frame; The upper end of the assembly plate is provided with a cleaning drive assembly, which includes a cleaning bracket slidably mounted on the upper end of the assembly plate. The bottom end of the cleaning bracket is provided with a wiping cleaning assembly, which includes a wiping seat fixedly mounted on the bottom end of the cleaning bracket. A wiping component is slidably mounted inside the wiping seat. Both the cleaning drive assembly and the wiping cleaning assembly are equipped with a cleaning component, which includes an expansion water pipe fixedly installed inside the wiping seat.

[0007] Preferably, the supporting auxiliary component includes an adjustment rod hinged to the upper end face of the photovoltaic panel frame, and an assembly shaft is rotatably installed at the connection between the assembly plate and the photovoltaic panel frame.

[0008] Preferably, a photovoltaic panel is fixed in the middle of the assembly plate, and guide grooves are provided on the left and right side walls of the assembly plate.

[0009] Preferably, the cleaning drive assembly further includes a servo motor fixedly mounted on one side of the top of the assembly plate, and a ball screw is fixedly mounted on the output end of the servo motor.

[0010] Preferably, a screw nut is fitted on the outer side of the ball screw, and the outer wall of the screw nut is fixedly connected to the cleaning bracket.

[0011] Preferably, the cleaning assembly includes a water tank fixedly installed on the upper end of the cleaning bracket, and a small water pump is fixedly installed on one end of the cleaning bracket.

[0012] Preferably, the input and output ends of the small water pump are both fixedly connected to water supply pipes, the water supply pipes are interconnected with the expansion water pipes, the output end of the expansion water pipes is fixedly connected to multiple spray pipes that are fixedly inserted inside the wiping seat, and part of the sidewall of the expansion water pipes is in contact with the wiping component.

[0013] Preferably, the wiping seat has an assembly groove inside, and a contraction spring is fixedly installed inside the assembly groove. The other end of the contraction spring is fixedly connected to the end face of the wiping component.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model precisely controls wiping pressure through water pressure, adapting to different types of stains. For light dust, the water output can be reduced by lowering the water pump power, causing the expansion tube to expand slightly. The wiping component cleans with low pressure, avoiding excessive friction. When encountering stubborn stains such as bird droppings or dried mud, the water pressure is increased to fully expand the expansion tube, allowing the wiping component to adhere to the surface with high pressure, enhancing the cleaning effect. Simultaneously, the expansion tube transmits pressure through elastic expansion, a "flexible drive": when the wiping component comes into contact with hard foreign objects on the photovoltaic panel surface, such as sand or metal fragments, the expansion tube will slightly contract due to the reaction force of the foreign object, automatically reducing local pressure and preventing foreign objects from being pressed into the panel and causing scratches. This is more "fault-tolerant" than mechanical rigid transmission pressure adjustment.

[0015] 2. After the water pump is started, the cleaning water serves two purposes: first, it acts as a cleaning medium, wetting the surface of the photovoltaic panel through the spray pipe to soften stains; second, it acts as a pressure driving source, expanding through the expansion pipe to push the wiping component. No additional motor or hydraulic device is needed to control the pressure of the wiping component, achieving "dual use of water" and simplifying the complexity of the mechanical structure. The simultaneous adjustment of water spraying and wiping pressure makes the wetted stains easier to remove by the wiping component. At this time, the pressure of the expansion pipe increases with the increase in water volume, forming a linked effect of "wetting-pressurization-powerful cleaning," which is more efficient than the step-by-step mode of "spraying water first, then dry wiping." Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the wiping seat of this utility model; Figure 3 This utility model Figure 2 A magnified view of the structure at point A in the middle; Figure 4 This is a side view of the structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the wiping and cleaning component of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Photovoltaic panel frame; 2. Support auxiliary components; 201. Adjustment rod; 202. Assembly plate; 203. Assembly shaft; 3. Photovoltaic panel; 4. Cleaning drive components; 401. Servo motor; 402. Guide slide; 403. Ball screw; 404. Screw nut; 405. Cleaning bracket; 5. Cleaning components; 501. Water tank; 502. Small water pump; 503. Water supply pipe; 504. Expansion water pipe; 505. Spray pipe; 6. Wiping and cleaning components; 601. Wiping seat; 602. Wiping component; 603. Assembly slot; 604. Retraction spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a technical solution: Please see Figures 1 to 5 A self-cleaning structure for solar photovoltaic panels includes a photovoltaic panel frame 1. A support auxiliary component 2 is provided at the upper end of the photovoltaic panel frame 1. The support auxiliary component 2 includes an assembly plate 202 rotatably mounted on the upper surface of the photovoltaic panel frame 1, with a photovoltaic panel 3 fixed at the middle position inside the assembly plate 202. A cleaning drive component 4 is provided at the upper end of the assembly plate 202. The cleaning drive component 4 includes a cleaning bracket 405 slidably mounted on the upper end of the assembly plate 202. A wiping cleaning component 6 is provided at the bottom end of the cleaning bracket 405, and the wiping cleaning component 6 includes a wiping device fixedly mounted on the bottom end of the cleaning bracket 405. Wiping base 601, with wiping component 602 slidably installed inside. Wiping component 602 has a micro-serrated edge structure with a tooth depth of 0.5mm, which generates turbulence when moving, enhancing the removal effect on dried water stains (containing salt and minerals) on the board surface. Both the cleaning drive component 4 and the wiping cleaning component 6 are equipped with a cleaning component 5. The cleaning component 5 includes an expansion water pipe 504 fixedly installed inside the wiping base 601 and a water tank 501 fixedly installed on the upper end of the cleaning bracket 405. A small water pump 502 is fixedly installed at one end of the cleaning bracket 405.

[0021] The input and output ends of the small water pump 502 are both fixedly connected to water supply pipes 503. The water supply pipes 503 and the expansion water pipes 504 are interconnected. The output end of the expansion water pipes 504 is fixedly connected to multiple spray pipes 505 that are fixedly inserted inside the wiping seat 601. Part of the side wall of the expansion water pipes 504 is in contact with the wiping component 602. The wiping seat 601 has an assembly groove 603 inside. A contraction spring 604 is fixedly installed inside the assembly groove 603. The other end of the contraction spring 604 is fixedly connected to the end face of the wiping component 602.

[0022] By adopting the above technical solution, during use, the operation of the cleaning drive component 4 drives the wiping cleaning component 6 and the cleaning component 5 to move together on the upper surface of the assembly plate 202 and the photovoltaic panel 3. When cleaning is performed, the small water pump 502 is started. The small water pump 502 can draw cleaning water from the water tank 501 through the water supply pipe 503 and deliver the cleaning water to the expansion water pipe 504 through the water supply pipe 503. Through the connection between the expansion water pipe 504 and the spray pipe 505, water can be sprayed onto the upper surface of the photovoltaic panel 3 through the spray water, thereby performing self-cleaning treatment on the photovoltaic panel 3 through water spraying. At the same time, the increase of water inside the expansion water pipe 504 causes the expansion water pipe 504 to expand. The expansion of the expansion water pipe 504 can press against the wiping component 602, thus pushing the wiping component 602. The wiping element 602 moves within the wiping seat 601, allowing it to approach the photovoltaic panel 3. The end face of the wiping element 602 cleans the photovoltaic panel 3. Simultaneously, changes in water pressure within the expansion pipe 504 provide varying pressures to the wiping element 602, enabling it to clean the photovoltaic panel 3 at different pressures. After cleaning, the wiping element 602 retracts into the wiping seat 601 under the elastic force of the contraction spring 604. When the water pump is activated, the cleaning water serves both as a cleaning medium, wetting the surface of the photovoltaic panel 3 through the spray pipe 505 to soften stains, and as a pressure driving source, expanding through the expansion pipe 504 to push the wiping element 602. This eliminates the need for an additional motor or hydraulic device to control the pressure of the wiping element 602, achieving "dual-purpose water" and simplifying the mechanical structure. The water spraying and wiping pressure adjustments are synchronized, making it easier for the wiping component 602 to remove the moistened stains. Simultaneously, the pressure in the expansion pipe 504 increases with the water flow, creating a coordinated "wetting-pressurizing-powerful cleaning" effect, which is more efficient than the step-by-step "water spraying first, then dry wiping" method. By precisely controlling the wiping pressure with water pressure, the system adapts to different stain types. For light dust, the water pump power can be reduced to decrease the water output, causing the expansion pipe 504 to expand slightly, allowing the wiping component 602 to clean with low pressure and avoid excessive friction. For stubborn stains such as bird droppings or dried mud, the water pressure is increased to fully expand the expansion pipe 504, allowing the wiping component 602 to adhere to the surface with high pressure, enhancing the cleaning effect. Meanwhile, the expansion tube 504 transmits pressure through elastic expansion, which is a "flexible drive": when the wiping component 602 comes into contact with hard foreign objects such as sand or metal shavings on the surface of the photovoltaic panel 3, the expansion tube 504 will slightly contract due to the reaction force of the foreign object, automatically reducing the local pressure and preventing the foreign object from being pressed into the panel and causing scratches. This is more "fault-tolerant" than mechanical rigid transmission pressure regulation. It should be noted that the small water pump 502 can be adjusted by manual operation or automatic control system to control the pump's power, thereby controlling the pump's flow rate, head, and other operating parameters to meet the requirements of different working conditions.

[0023] Specifically, such as Figures 1 to 5 As shown, the support auxiliary component 2 includes an adjustment rod 201 hinged to the upper surface of the photovoltaic panel frame 1, an assembly shaft 203 rotatably mounted at the connection between the assembly plate 202 and the photovoltaic panel frame 1, a photovoltaic panel 3 fixed in the middle position inside the assembly plate 202, and guide grooves 402 provided on the left and right side walls of the assembly plate 202. The cleaning drive component 4 also includes a servo motor 401 fixedly mounted on one side of the top of the assembly plate 202, a ball screw 403 fixedly mounted at the output end of the servo motor 401, a screw nut 404 sleeved on the outer side of the ball screw 403, and a fixed connection between the outer wall of the screw nut 404 and the cleaning bracket 405.

[0024] By adopting the above technical solution, the control rod 201 can automatically extend and retract, which can push the assembly plate 202 to rotate on the photovoltaic panel frame 1 via the assembly shaft 203. This allows for adjustment of the angle of the assembly plate 202, enabling the photovoltaic panel 3 on the assembly plate 202 to be angled for better energy conversion. Simultaneously, the adjustable tilt angle of the photovoltaic panel 3 makes it easier for dust and cleaning water to fall off when tilted. During cleaning, the servo motor 401 is activated, driving the ball screw 403 to rotate. The rotation of the ball screw 403 moves the screw nut 404, which in turn moves the cleaning bracket 405 within the guide groove 402. This allows the wiping and cleaning components 6 and the washing components 5 on the cleaning bracket 405 to clean the photovoltaic panel 3.

[0025] Working Principle: During use, the servo motor 401 is started, driving the ball screw 403 to rotate. The ball screw 403 rotates, causing the screw nut 404 to move. The screw nut 404 then moves the cleaning bracket 405 within the guide groove 402, thereby enabling the wiping and cleaning components 6 and washing components 5 on the cleaning bracket 405 to clean the photovoltaic panel 3. Simultaneously, the small water pump 502 is started, drawing clean water from the water tank 501 through the water pipe 503 and delivering it to the expansion pipe 504. The expansion pipe 504 connects to the spray pipe 505, spraying water onto the upper surface of the photovoltaic panel 3. This water spraying provides self-cleaning for the photovoltaic panel 3. Furthermore, the increased water volume inside the expansion pipe 504 allows for cleaning of the photovoltaic panel 3. The expansion tube 504 expands, pressing the wiping component 602 against it. This pushes the wiping component 602 to move within the wiping seat 601, allowing it to approach the photovoltaic panel 3. The end face of the wiping component 602 cleans the photovoltaic panel 3. Simultaneously, changes in water pressure within the expansion tube 504 provide different pressures to squeeze the wiping component 602, enabling it to clean the end face of the photovoltaic panel 3 with varying pressures. The adjustable rod 201 automatically extends and retracts, allowing the assembly plate 202 to rotate on the photovoltaic panel frame 1 via the assembly shaft 203. This adjusts the angle of the assembly plate 202, allowing the photovoltaic panel 3 on it to be tilted. The adjustable tilt angle of the photovoltaic panel 3 makes it easier for dust and cleaning water to fall off when tilted.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A self-cleaning structure for solar photovoltaic panels, comprising a photovoltaic panel frame (1), characterized in that: The upper end of the photovoltaic panel frame (1) is provided with a support auxiliary component (2), which includes an assembly plate (202) rotatably mounted on the upper surface of the photovoltaic panel frame (1). The upper end of the assembly plate (202) is provided with a cleaning drive assembly (4), the cleaning drive assembly (4) includes a cleaning bracket (405) slidably mounted on the upper end of the assembly plate (202), the bottom surface of the cleaning bracket (405) is provided with a wiping cleaning assembly (6), the wiping cleaning assembly (6) includes a wiping seat (601) fixedly mounted on the bottom surface of the cleaning bracket (405), and a wiping component (602) is slidably mounted inside the wiping seat (601); Both the cleaning drive assembly (4) and the wiping cleaning assembly (6) are equipped with a cleaning assembly (5), and the cleaning assembly (5) includes an expansion water pipe (504) fixedly installed inside the wiping seat (601).

2. The self-cleaning structure for a solar photovoltaic panel according to claim 1, characterized in that: The supporting auxiliary component (2) includes an adjustment rod (201) hinged to the upper end face of the photovoltaic panel frame (1), and an assembly shaft (203) is rotatably installed at the connection between the assembly plate (202) and the photovoltaic panel frame (1).

3. The self-cleaning structure for a solar photovoltaic panel according to claim 2, characterized in that: A photovoltaic panel (3) is fixed in the middle of the assembly plate (202), and guide grooves (402) are provided on the left and right side walls of the assembly plate (202).

4. The self-cleaning structure for a solar photovoltaic panel according to claim 3, characterized in that: The cleaning drive assembly (4) also includes a servo motor (401) fixedly installed on one side of the top of the assembly plate (202), and a ball screw (403) is fixedly installed at the output end of the servo motor (401).

5. The self-cleaning structure for a solar photovoltaic panel according to claim 4, characterized in that: The ball screw (403) is fitted with a screw nut (404) on its outer side, and the outer wall of the screw nut (404) is fixedly connected to the cleaning bracket (405).

6. The self-cleaning structure for a solar photovoltaic panel according to claim 5, characterized in that: The cleaning assembly (5) includes a water tank (501) fixedly installed on the upper end of the cleaning bracket (405), and a small water pump (502) is fixedly installed on one end of the cleaning bracket (405).

7. The self-cleaning structure for a solar photovoltaic panel according to claim 6, characterized in that: The input and output ends of the small water pump (502) are both fixedly connected to water pipes (503). The water pipes (503) and the expansion water pipes (504) are interconnected. The output end of the expansion water pipes (504) is fixedly connected to multiple spray pipes (505) that are fixedly inserted inside the wiping seat (601). Part of the side wall of the expansion water pipes (504) is in contact with the wiping component (602).

8. The self-cleaning structure for a solar photovoltaic panel according to claim 1, characterized in that: The wiping seat (601) has an assembly groove (603) inside, and a retraction spring (604) is fixedly installed inside the assembly groove (603). The other end of the retraction spring (604) is fixedly connected to the end face of the wiping component (602).

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