An automatic spray cleaning system for photovoltaic panels and its working method

Abstract

An automatic spray cleaning system for photovoltaic panels and its working method disclosed by the present invention belong to the technical field of photovoltaic power generation. A photovoltaic charger and a first guide wheel are fixed at the upper end of a photovoltaic bracket, a water collecting tank and a second guide wheel are fixed at the lower end, and a spray cleaning device is arranged on the surface of the photovoltaic panel; one end of a first towing rope is connected to the upper end of the spray cleaning device, and the other end is connected to a water supply bucket; one end of a second towing rope is connected to the lower end of the spray cleaning device, and the other end is connected to a water collecting bucket; a water collecting submersible pump is arranged in the water collecting bucket, a water supply submersible pump is arranged in the water supply bucket, a water collecting pipe is connected between the water collecting tank and the water collecting bucket, a water delivery pipe is connected between the water collecting submersible pump and the water supply bucket, and a water supply pipe is connected between the water supply submersible pump and the spray cleaning device; the photovoltaic charger is connected to the water collecting submersible pump and the water supply submersible pump. It can clean the photovoltaic panels in time, with high cleaning efficiency, high automation degree, convenient and flexible operation, saving labor costs and water resources.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic power generation, and particularly relates to an automatic spray cleaning system for photovoltaic panels and a working method thereof. Background Art

[0002] The cleaning of photovoltaic panels is an important task during the operation and maintenance of photovoltaic power stations. Most photovoltaic power stations are located in the central and western regions with good sunlight. Due to the special climate distribution in China, the central and western regions are mostly arid and windy sandy areas, and there are many dusty days in spring and autumn. The dust coverage causes the power generation loss to exceed 10%. At present, most domestic photovoltaic power stations adopt manual cleaning, that is, the mop water washing method, or robot cleaning, that is, the brush cleaning method. Both methods have low efficiency, cannot ensure the timely cleaning of photovoltaic panels, and are easy to cause damage to the glass surface, affecting the power generation; at the same time, in the central and western regions, there is little rain and drought, and the traditional water washing method consumes too much water resources, which has an adverse impact on the local environment. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the invention is to provide an automatic spray cleaning system for photovoltaic panels and a working method thereof, which can clean the photovoltaic panels in time, has high cleaning efficiency, high automation degree, is convenient and flexible, saves labor costs, and saves water resources.

[0004] The invention is realized through the following technical solutions:

[0005] The invention discloses an automatic spray cleaning system for photovoltaic panels, which includes a photovoltaic charger, a spray cleaning device, a first traction rope, a first guide pulley, a water collecting tank, a water collecting bucket, a water collecting submersible pump, a water supply bucket, a water supply submersible pump, a second traction rope and a second guide pulley;

[0006] The photovoltaic charger and the first guide pulley are fixed at the upper end of the photovoltaic bracket, the water collecting tank and the second guide pulley are fixed at the lower end of the photovoltaic bracket, and the spray cleaning device is arranged on the surface of the photovoltaic panel; one end of the first traction rope is connected to the upper end of the spray cleaning device, and the other end bypasses the first guide pulley and is connected to the water supply bucket; one end of the second traction rope is connected to the lower end of the spray cleaning device, and the other end bypasses the second guide pulley and is connected to the water collecting bucket; the water collecting submersible pump is arranged in the water collecting bucket, the water supply submersible pump is arranged in the water supply bucket, a water collecting pipe is connected between the water collecting tank and the water collecting bucket, a water delivery pipe is connected between the water collecting submersible pump and the water supply bucket, and a water supply pipe is connected between the water supply submersible pump and the spray cleaning device; the photovoltaic charger is connected to the water collecting submersible pump and the water supply submersible pump.

[0007] Preferably, a touch switch is arranged at the upper end of the photovoltaic panel, and the touch switch is connected to the water collecting submersible pump and the water supply submersible pump.

[0008] Preferably, a first pulley block is provided between the first guide wheel and the water supply bucket, and the first towing rope successively bypasses the first guide wheel and the first pulley block and is connected to the water supply bucket; a second pulley block is provided between the second guide wheel and the water collecting bucket, and the second towing rope successively bypasses the second guide wheel and the second pulley block and is connected to the water collecting bucket.

[0009] Preferably, the spray cleaning device includes a spray pipe and a flexible cleaning wipe. The flexible cleaning wipe is fixed to the lower part of the spray pipe. The flexible cleaning wipe contacts the surface of the photovoltaic panel, and a plurality of spray holes are formed in the spray pipe.

[0010] Further preferably, a slider is provided in the middle of the spray pipe, and a slide rail matching the slider is provided in the middle clearance of the photovoltaic panel.

[0011] Preferably, the movement trajectories of the first towing rope and the second towing rope are in the middle clearance of the photovoltaic panel.

[0012] Preferably, a limiting device is provided at the lower end of the photovoltaic panel.

[0013] Preferably, a buoyancy switch is provided in the water collecting bucket, and the buoyancy switch is connected to the water collecting submersible pump.

[0014] Preferably, a filter screen is provided between the water collecting tank and the water collecting pipe.

[0015] The working method of the above-mentioned automatic spray cleaning system for photovoltaic panels disclosed by the present invention includes:

[0016] The photovoltaic charger converts light energy into electrical energy to supply the water collecting submersible pump and the water supply submersible pump; when it is necessary to clean the photovoltaic panel, the water supply submersible pump is turned on to pressurize and supply water to the spray cleaning device to clean the photovoltaic panel. The water after cleaning flows along the photovoltaic panel into the water collecting tank and then enters the water collecting bucket along the water collecting pipe. As the weight of the water supply bucket decreases and the weight of the water collecting bucket increases, the water collecting bucket pulls the spray cleaning device to slide from the upper end to the lower end of the photovoltaic panel through the second towing rope, and the entire surface of the photovoltaic panel is cleaned during the process;

[0017] After the cleaning is completed, the water supply submersible pump is turned off, and the water collecting submersible pump is turned on. The water collecting submersible pump transports the water in the water collecting bucket back to the water supply bucket through the water delivery pipe. As the weight of the water collecting bucket decreases and the weight of the water supply bucket increases, the water supply bucket pulls the spray cleaning device to slide back from the lower end to the upper end of the photovoltaic panel through the first towing rope for resetting.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] An automatic spray cleaning system for photovoltaic panels disclosed by the present invention is composed of a spray cleaning device, a first towing rope, a water collecting bucket, a water supply bucket and a second towing rope, forming a mechanism with automatic gravity balance function. Through the changes in the water volumes in the water collecting bucket and the water supply bucket, the automatic cleaning of the photovoltaic panels by the spray cleaning device can be achieved, and the first guide wheel and the second guide wheel can ensure the smooth movement track of the spray cleaning device. The photovoltaic charger can utilize the existing light energy to supply power to the water collecting submersible pump and the water supply submersible pump, with high energy utilization rate and low cost. The water after cleaning is collected through a water collecting trough and reused, saving water resources and reducing environmental damage. The whole system is reasonably structured, and the remote control of the whole system can be realized through an automatic control system. It can be cleaned regularly remotely or cleaned at any time on site, which is convenient and flexible. According to specific situations, it can be adjusted in a timely manner to minimize the power generation loss caused by cleaning delays.

[0020] Furthermore, a touch switch is set to automatically turn off the water collecting submersible pump and the water supply submersible pump when the spray cleaning device resets, further improving the automation of the system.

[0021] Furthermore, since the distance between the photovoltaic panels and the ground or the foundation is limited, on the one hand, the first pulley block and the second pulley block can reduce the length of the first towing rope between the first guide wheel and the water supply bucket and the length of the second towing rope between the second guide wheel and the water collecting bucket by increasing the number of strands of the rope, ensuring the normal operation of the system; on the other hand, it can reduce the starting weight when the water collecting bucket and the water supply bucket move, improving the sensitivity of the system.

[0022] Furthermore, after the water is sprayed out through the spray holes of the spray pipe, a flexible cleaning wipe is used for cleaning, with good effect; and the flexible cleaning wipe will not cause damage to the photovoltaic panels.

[0023] Even further, a slider is provided in the middle of the spray pipe, and the spray pipe slides on the slide rail through the slider without deviation, with good stability.

[0024] Furthermore, the movement tracks of the first towing rope and the second towing rope are in the middle clearance of the photovoltaic panels, and no shadow occlusion will be formed to affect the power of the photovoltaic panels.

[0025] Furthermore, the limiting device at the lower end of the photovoltaic panels can prevent the spray cleaning device from sliding out of the photovoltaic panels, improving the safety and stability of the system.

[0026] Furthermore, the water collecting submersible pump is opened and closed through a buoyancy switch, which can achieve automation and save manpower.

[0027] Furthermore, a filter screen is provided between the water collecting trough and the water collecting pipe, which can prevent impurities from entering the water circulation system and improve the stability of the system.

[0028] The working method of the above-mentioned automatic spray cleaning system for photovoltaic panels disclosed by the present invention has high cleaning efficiency and high automation degree. It can perform regular cleaning or on-site cleaning at any time according to the actual situation, which is convenient and flexible, saves labor costs, and saves electric energy and water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the automatic spray cleaning system for photovoltaic panels of the present invention;

[0030] Figure 2 is a front view of the spray cleaning device;

[0031] Figure 3 is a side view of the spray cleaning device.

[0032] In the figure: 1 - photovoltaic charger, 2 - spray cleaning device, 2 - 1 - spray pipe, 2 - 2 - flexible cleaning wipe, 2 - 3 - spray holes, 3 - first tow rope, 4 - first guide pulley, 5 - water collecting tank, 6 - water collecting bucket, 7 - water collecting submersible pump, 8 - water delivery pipe, 9 - water supply bucket, 10 - water supply submersible pump, 11 - second tow rope, 12 - second guide pulley, 13 - water supply pipe, 14 - water collecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following further describes the present invention in detail with reference to the drawings and specific embodiments. The content is an explanation of the present invention rather than a limitation:

[0034] An automatic spray cleaning system for photovoltaic panels of the present invention, as Figure 1 , includes a photovoltaic charger 1, a spray cleaning device 2, a first tow rope 3, a first guide pulley 4, a water collecting tank 5, a water collecting bucket 6, a water collecting submersible pump 7, a water supply bucket 9, a water supply submersible pump 10, a second tow rope 11 and a second guide pulley 12; the photovoltaic charger 1 and the first guide pulley 4 are fixed at the upper end of the photovoltaic support, the water collecting tank 5 and the second guide pulley 12 are fixed at the lower end of the photovoltaic support, and the spray cleaning device 2 is arranged on the surface of the photovoltaic panel. The water supply bucket 9 is connected to a water source, such as a water collecting pool set nearby, and the water supply bucket 9 is automatically replenished through the water level gauge switch inside the water supply bucket 9.

[0035] Such as Figure 2 , Figure 3, the spray cleaning device 2 includes a spray pipe 2-1 and a flexible cleaning wipe 2-2. The flexible cleaning wipe 2-2 is fixed to the lower part of the spray pipe 2-1. The flexible cleaning wipe 2-2 contacts the surface of the photovoltaic panel. A number of spray holes 2-3 are provided on the spray pipe 2-1. The flexible cleaning wipe 2-2 can be made of materials such as rubber and sponge, which can achieve a good cleaning effect without damaging the surface of the photovoltaic panel. To improve the running stability of the spray pipe 2-1, a slider can be provided in the middle of the spray pipe 2-1, and a slide rail matching the slider can be provided in the middle clearance of the photovoltaic panel to guide the spray pipe 2-1. At the same time, a limiting device such as a brake plate and a limiting block can be provided at the lower end of the photovoltaic panel to prevent the spray pipe 2-1 from sliding out of the photovoltaic panel.

[0036] One end of the first towing rope 3 is connected to the upper end of the spray cleaning device 2, and the other end bypasses the first guide wheel 4 and is connected to the water supply bucket 9; one end of the second towing rope 11 is connected to the lower end of the spray cleaning device 2, and the other end bypasses the second guide wheel 12 and is connected to the water collecting bucket 6; the movement trajectories of the first towing rope 3 and the second towing rope 11 are in the middle clearance of the photovoltaic panel. Considering the limited distance between the photovoltaic panel and the ground or the foundation, a first pulley group can be provided between the first guide wheel 4 and the water supply bucket 9, and the first towing rope 3 bypasses the first guide wheel 4 and the first pulley group in sequence and is connected to the water supply bucket 9; a second pulley group is provided between the second guide wheel 12 and the water collecting bucket 6, and the second towing rope 11 bypasses the second guide wheel 12 and the second pulley group in sequence and is connected to the water collecting bucket 6. The first pulley group and the second pulley group include fixed pulleys and movable pulleys, which are set according to actual needs. The fixed pulleys are fixedly connected to the photovoltaic support. By increasing the number of strands of the first towing rope 3 and the second towing rope 11 bypassing the first pulley group and the second pulley group, the distance can be shortened to ensure the normal operation of the system, and at the same time, the starting weight can be reduced and the sensitivity of the system can be improved.

[0037] The water collecting submersible pump 7 is arranged in the water collecting bucket 6. A buoyancy switch can be arranged in the water collecting bucket 6, and the buoyancy switch is connected to the water collecting submersible pump 7. The water collecting submersible pump 7 starts after the water in the water collecting bucket 6 reaches a predetermined water level; the water supply submersible pump 10 is arranged in the water supply bucket 9. A water collecting pipe 14 is connected between the water collecting tank 5 and the water collecting bucket 6, and a filter screen is arranged between the water collecting tank 5 and the water collecting pipe 14 to prevent sundries from entering the water circulation of the system and affecting the normal operation of the system; a water delivery pipe 8 is connected between the water collecting submersible pump 7 and the water supply bucket 9, and a water supply pipe 13 is connected between the water supply submersible pump 10 and the spray cleaning device 2; the photovoltaic charger 1 is connected to the water collecting submersible pump 7 and the water supply submersible pump 10; at the same time, a touch switch can be arranged at the upper end of the photovoltaic panel, and the touch switch is connected to the water collecting submersible pump 7 and the water supply submersible pump 10.

[0038] When the automatic spray cleaning system for photovoltaic panels of the present invention is working:

[0039] The photovoltaic charger 1 converts light energy into electrical energy to supply the water collection submersible pump 7 and the water supply submersible pump 10; when the photovoltaic panels need to be cleaned, the water supply submersible pump 10 is turned on to pressurize and supply water to the spray cleaning device 2 to clean the photovoltaic panels. The water after cleaning flows along the photovoltaic panels into the water collection tank 5 and then enters the water collection bucket 6 along the water collection pipe 14. As the weight of the water supply bucket 9 decreases and the weight of the water collection bucket 6 increases, the water collection bucket 6 pulls the spray cleaning device 2 to slide from the upper end to the lower end of the photovoltaic panels through the second towing rope 11, and the entire surface of the photovoltaic panels is cleaned during the process.

[0040] After the cleaning is completed, the water supply submersible pump 10 is turned off and the water collection submersible pump 7 is turned on. The water collection submersible pump 7 transports the water in the water collection bucket 6 back to the water supply bucket 9 through the water delivery pipe 8. As the weight of the water collection bucket 6 decreases and the weight of the water supply bucket 9 increases, the water supply bucket 9 pulls the spray cleaning device 2 to slide back from the lower end to the upper end of the photovoltaic panels through the first towing rope 3. After touching the touch switch, the water collection submersible pump 7 and the water supply submersible pump 10 are powered off and standby, waiting for the next cleaning operation.

[0041] When the water level inside the water supply bucket 9 is too low, the water supply bucket 9 is automatically replenished with water through the water level gauge switch inside the water supply bucket 9. The water collection submersible pump 7 and the water supply submersible pump 10 can be opened and closed using the remote control switch, or can also be operated by the staff on site.

[0042] It should be noted that the above is only one of the embodiments of the present invention. Equivalent changes made to the system described according to the present invention are all included in the protection scope of the present invention. Those skilled in the technical field to which the present invention belongs can make similar alternative ways to the specific examples described as long as they do not deviate from the structure of the present invention or exceed the scope defined by this claim book, and all belong to the protection scope of the present invention.

Claims

1. An automatic spraying and cleaning system for photovoltaic panels, characterized in that, It includes a photovoltaic charger (1), a spray cleaning device (2), a first towing rope (3), a first guide pulley (4), a water collecting tank (5), a water collecting bucket (6), a water collecting submersible pump (7), a water supply bucket (9), a water supply submersible pump (10), a second towing rope (11) and a second guide pulley (12); The photovoltaic charger (1) and the first guide pulley (4) are fixed at the upper end of the photovoltaic support, the water collecting tank (5) and the second guide pulley (12) are fixed at the lower end of the photovoltaic support, and the spray cleaning device (2) is arranged on the surface of the photovoltaic panel; One end of the first towing rope (3) is connected to the upper end of the spray cleaning device (2), and the other end bypasses the first guide pulley (4) and is connected to the water supply bucket (9); One end of the second towing rope (11) is connected to the lower end of the spray cleaning device (2), and the other end bypasses the second guide pulley (12) and is connected to the water collecting bucket (6); The water collecting submersible pump (7) is arranged in the water collecting bucket (6), the water supply submersible pump (10) is arranged in the water supply bucket (9), a water collecting pipe (14) is connected between the water collecting tank (5) and the water collecting bucket (6), a water delivery pipe (8) is connected between the water collecting submersible pump (7) and the water supply bucket (9), and a water supply pipe (13) is connected between the water supply submersible pump (10) and the spray cleaning device (2); The photovoltaic charger (1) is connected to the water collecting submersible pump (7) and the water supply submersible pump (10), a touch switch is arranged at the upper end of the photovoltaic panel, the touch switch is connected to the water collecting submersible pump (7) and the water supply submersible pump (10), a first pulley block is arranged between the first guide pulley (4) and the water supply bucket (9), and the first towing rope (3) bypasses the first guide pulley (4) and the first pulley block in sequence and is connected to the water supply bucket (9); A second pulley block is arranged between the second guide pulley (12) and the water collecting bucket (6), and the second towing rope (11) bypasses the second guide pulley (12) and the second pulley block in sequence and is connected to the water collecting bucket (6).

2. The automatic spraying and cleaning system for photovoltaic panels according to claim 1, characterized in that, The spray cleaning device (2) includes a spray pipe (2-1) and a flexible cleaning wipe (2-2), the flexible cleaning wipe (2-2) is fixed at the lower part of the spray pipe (2-1), the flexible cleaning wipe (2-2) is in contact with the surface of the photovoltaic panel, and a plurality of spray holes (2-3) are formed in the spray pipe (2-1).

3. The automatic spraying and cleaning system for photovoltaic panels according to claim 2, characterized in that, A slider is arranged in the middle of the spray pipe (2-1), and a slide rail matching the slider is arranged in the middle space of the photovoltaic panel.

4. The automatic spraying and cleaning system for photovoltaic panels according to claim 1, characterized in that, The movement tracks of the first towing rope (3) and the second towing rope (11) are in the middle space of the photovoltaic panel.

5. The automatic spraying and cleaning system for photovoltaic panels according to claim 1, characterized in that, A limiting device is arranged at the lower end of the photovoltaic panel.

6. The automatic spraying and cleaning system for photovoltaic panels according to claim 1, characterized in that, A buoyancy switch is arranged in the water collecting bucket (6), and the buoyancy switch is connected to the water collecting submersible pump (7).

7. The automatic spraying and cleaning system for photovoltaic panels according to claim 1, characterized in that, A filter screen is arranged between the water collecting tank (5) and the water collecting pipe (14).

8. The working method of the automatic spraying and cleaning system for photovoltaic panels according to any one of claims 1 to 7, characterized in that, It includes: The photovoltaic charger (1) converts light energy into electrical energy to supply the water collection submersible pump (7) and the water supply submersible pump (10); when the photovoltaic panels need to be cleaned, the water supply submersible pump (10) is turned on to pressurize and supply water to the spray cleaning device (2) to clean the photovoltaic panels. The water after cleaning flows along the photovoltaic panels into the water collection tank (5) and then enters the water collection bucket (6) along the water collection pipe (14). As the weight of the water supply bucket (9) decreases and the weight of the water collection bucket (6) increases, the water collection bucket (6) pulls the spray cleaning device (2) to slide from the upper end to the lower end of the photovoltaic panels through the second towing rope (11), and the entire surface of the photovoltaic panels is cleaned during the process; After the cleaning is completed, the water supply submersible pump (10) is turned off and the water collection submersible pump (7) is turned on. The water collection submersible pump (7) transports the water in the water collection bucket (6) back to the water supply bucket (9) through the water delivery pipe (8). As the weight of the water collection bucket (6) decreases and the weight of the water supply bucket (9) increases, the water supply bucket (9) pulls the spray cleaning device (2) to slide back from the lower end to the upper end of the photovoltaic panels to reset through the first towing rope (3).

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