Photovoltaic system cleaning device

Abstract

The invention discloses a photovoltaic system cleaning device which comprises a photovoltaic panel unit, the photovoltaic panel unit has a gradient, the gradient direction is defined as the longitudinal direction, the direction horizontally perpendicular to the longitudinal direction is defined as the transverse direction, and the cleaning device comprises two water spraying frames, two transmission mechanisms and a driving mechanism. The driving mechanism is arranged on a non-power-generation area in the middle of the photovoltaic system, the two transmission mechanisms are arranged on the two sides of the driving mechanism and arranged in the transverse direction, and the two water spraying frames are connected to the corresponding transmission mechanisms respectively. The driving mechanism simultaneously drives the two transmission mechanisms to drive the two water spraying frames to spray water to clean the photovoltaic panel units on the two sides of the non-power-generation area in the transverse direction. The device has the advantages of simple structure, low cost and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and particularly relates to a cleaning device for a photovoltaic system. Background Art

[0002] Solar energy is the energy generated by the continuous nuclear fusion reaction process of sunspots inside or on the surface of the sun. Solar energy has the advantages of sufficient resources, long lifespan, wide distribution, safety, cleanliness, and reliable technology. Since solar energy can be converted into various other forms of energy, its application range is very wide. To obtain electric power from solar energy, it is necessary to achieve photoelectric conversion through solar cells.

[0003] Photovoltaic panels are often installed on the top surface of buildings in large areas to receive sunlight and generate electricity. Under specific conditions, the photovoltaic panels covering the top surface of the building can replace the roof to shield against wind and rain.

[0004] Currently, many industrial and commercial rooftops are installed with photovoltaic power generation systems. The rooftop photovoltaic modules need to be regularly cleaned of the dust and dirt on the surface to avoid affecting their practical power generation. Existing cleaning robots cannot cross the ridge and need to be manually carried, which is time-consuming and laborious. In addition, when a cleaning robot cleans a photovoltaic system with a large horizontal span, the cleaning time is long and the efficiency is very low. The traditional cleaning method has a low cleaning frequency (cleaning only once every few months), and the longer the cleaning interval, the more dust and dirt accumulate, resulting in a greater reduction in the power generation of the photovoltaic modules (one month after cleaning in some areas, the power generation has decreased by 50% or even more). At the same time, the longer the cleaning interval, the more difficult it is to clean the dust and dirt, so to ensure a clean cleaning, the requirement for the intelligence level of the robot is higher, and the price is mostly relatively expensive (several thousand to tens of thousands of yuan each). Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a cleaning device for a photovoltaic system with a simple structure, low cost, and high efficiency.

[0006] To solve the above technical problem, the present invention adopts the following technical solutions: A cleaning device for a photovoltaic system, the photovoltaic system includes a photovoltaic panel unit, the photovoltaic panel unit has a slope, the slope direction is defined as the longitudinal direction, and the direction horizontally perpendicular to the longitudinal direction is defined as the transverse direction. The cleaning device includes two water spraying frames, two transmission mechanisms, and a driving mechanism. The driving mechanism is arranged on the non-power generation area in the middle of the photovoltaic system. The two transmission mechanisms are arranged on both sides of the driving mechanism and are arranged along the transverse direction. The two water spraying frames are respectively connected to the corresponding transmission mechanisms. The driving mechanism simultaneously drives the two transmission mechanisms to drive the two water spraying frames to spray and clean the photovoltaic panel units on both sides of the non-power generation area along the transverse direction.

[0007] As a further improvement of the above technical solution: The water spraying frame includes a water spraying pipe and support seats fixedly installed at both ends of the water spraying pipe. The support seats are slidably installed on the photovoltaic panel unit and connected to the transmission mechanism.

[0008] Rollers that are slidably connected to the photovoltaic panel unit are installed at the bottom of the support seats.

[0009] The transmission mechanism includes a driven roller and two steel wire ropes. The driven roller is arranged longitudinally at the end side of the roof. One end of each of the two steel wire ropes is wound around the driven roller, and the other end is connected to the driving mechanism. The two steel wire ropes are also respectively connected to the two support seats.

[0010] The driving mechanism includes a driving motor, a commutator, two gears, two belts, and two driving shafts. The two gears are respectively installed on the output ends of the driving motor and the commutator and are engaged with each other. The two driving shafts are movably connected to the non-power generation area longitudinally through bearings. One end of one of the two belts is wound around the output end of the driving motor, and the other end is wound around one of the driving shafts. One end of the other belt is wound around the output end of the commutator, and the other end is wound around the other driving shaft. Each of the steel wire ropes is wound around the corresponding driving shaft.

[0011] A cleaning device for a photovoltaic system. The photovoltaic system includes a photovoltaic panel unit. The photovoltaic panel unit is paved on the roof and has a slope. The slope direction is defined as the longitudinal direction, and the direction horizontally perpendicular to the longitudinal direction is defined as the transverse direction. The cleaning device includes a driving mechanism, a plurality of water spraying frames, and a transmission mechanism matching the number of water spraying frames. The driving mechanism is arranged on the ridge of the roof. Each transmission mechanism is arranged on both sides of the ridge and arranged in the transverse direction. Each of the water spraying frames is respectively connected to the corresponding transmission mechanism. The driving mechanism simultaneously drives each transmission mechanism to drive each water spraying frame to spray and clean the photovoltaic panel units on both sides of the ridge in the transverse direction.

[0012] As a further improvement of the above technical solution: The driving mechanism is arranged at the end of the ridge. The driving mechanism drives the two transmission mechanisms to drive the two water spraying frames to spray and clean the photovoltaic panel units on both sides of the ridge.

[0013] The water spraying frame includes a water spraying pipe and support seats fixedly installed at both ends of the water spraying pipe. The support seats are slidably installed on the photovoltaic panel unit and connected to the transmission mechanism.

[0014] Rollers that are slidably connected to the photovoltaic panel unit are installed at the bottom of the support seats.

[0015] The transmission mechanism includes a driven roller and two steel wire ropes. The driven roller is arranged along the longitudinal direction at the end side of the roof away from the driving mechanism. One end of each of the two steel wire ropes is wound around the driven roller, and the other end is connected to the driving mechanism. The two steel wire ropes are also respectively connected to the two support seats.

[0016] The driving mechanism includes a driving motor, two belts and two driving shafts. The two driving shafts are movably connected along the longitudinal direction to the top side of the roof through bearings. One end of each of the two belts is wound around the output end of the driving motor, and the other end is respectively connected to the two driving shafts.

[0017] The driving mechanism is arranged in the middle of the roof ridge. Transmission mechanisms are arranged on both sides of the driving mechanism. The driving mechanism drives each transmission mechanism to drive each water spraying frame to spray and clean the photovoltaic panel units on both sides of the roof ridge.

[0018] The water spraying frame includes a water spraying pipe and support seats fixedly installed at both ends of the water spraying pipe. The support seats are slidably mounted on the photovoltaic panel units and are connected to the transmission mechanism.

[0019] Rollers slidably connected to the photovoltaic panel units are installed at the bottom of the support seats.

[0020] The transmission mechanism includes a driven roller and two steel wire ropes. The driven roller is arranged along the longitudinal direction at the end side of the roof away from the driving mechanism. One end of each of the two steel wire ropes is wound around the driven roller, and the other end is connected to the driving mechanism. The two steel wire ropes are also respectively connected to the two support seats.

[0021] The driving mechanism includes a driving motor, a commutator, two gears, four belts and four driving shafts. The two gears are respectively installed on the output ends of the driving motor and the commutator and are meshed with each other. The driving shafts are paired in twos and are movably connected along the longitudinal direction through bearings to the non-power generation areas in the middle of the roof on both sides of the roof ridge. One end of two of the belts is wound around the output end of the driving motor, and the other end is respectively wound around the two driving shafts on both sides of the roof ridge. One end of the other two belts is wound around the output end of the commutator, and the other end is respectively wound around the other two driving shafts on both sides of the roof ridge.

[0022] Compared with the prior art, the advantages of the present invention are as follows: The photovoltaic system cleaning device of the present invention drives two transmission mechanisms to drive two water spraying frames to flush and clean the photovoltaic panel units on both sides by arranging a driving mechanism in the middle of the photovoltaic system, meeting the cleaning requirements of the photovoltaic system on roofs with a large horizontal span, improving the cleaning efficiency. Moreover, the present invention adopts the simplest straight-line flushing and cleaning method, greatly reducing the cleaning difficulty, simplifying the structure of the cleaning device and reducing the cost.

[0023] The present invention drives two transmission mechanisms through a driving mechanism arranged on the ridge to drive two water spraying frames to flush and clean the photovoltaic panel units on both sides of the ridge, enabling the cleaning device to cross the ridge to clean the photovoltaic panel units, eliminating the need for manual handling, saving time and effort, improving the cleaning efficiency. Moreover, the present invention adopts the simplest linear flushing and cleaning method, greatly reducing the cleaning difficulty, simplifying the structure of the cleaning device, and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 6 is a schematic diagram of the overall structure (three-dimensional view) of Embodiment 1 of the present invention.

[0025] Figure 2 FIG. 10 is a schematic diagram of the overall structure (top view) of Embodiment 1 of the present invention.

[0026] Figure 3 FIG. 14 is Figure 1 an enlarged view of part A in FIG.

[0027] Figure 4 FIG. 20 is a schematic diagram of the overall structure (three-dimensional view) of Embodiment 2 of the present invention.

[0028] Figure 5 FIG. 24 is Figure 4 an enlarged view of part B in FIG.

[0029] Figure 6 FIG. 30 is a schematic diagram of the overall structure (three-dimensional view) of Embodiment 3 of the present invention.

[0030] Figure 7 FIG. 34 is Figure 6 an enlarged view of part C in FIG.

[0031] In the figures, each reference numeral represents: 1, photovoltaic panel unit; 2, roof; 3, water spraying frame; 31, water spraying pipe; 32, support seat; 321, roller; 4, transmission mechanism; 41, driven roller; 42, steel wire rope; 5, driving mechanism; 51, driving motor; 52, reversing machine; 53, gear; 54, belt; 55, driving shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present invention will be further described in detail below with reference to the accompanying drawings of the specification and specific embodiments.

[0033] Embodiment 1: As Figures 1 to 3As shown in the figure, the first embodiment of the cleaning device for a photovoltaic system according to the present invention. The photovoltaic system includes a photovoltaic panel unit 1, and the photovoltaic panel unit 1 has a slope. The slope direction is defined as the longitudinal direction, and the direction horizontally perpendicular to the longitudinal direction is defined as the transverse direction. The cleaning device includes two water spray frames 3, two transmission mechanisms 4, and a driving mechanism 5. The driving mechanism 5 is arranged on the non-power generation area in the middle of the photovoltaic system 2. The two transmission mechanisms 4 are arranged on both sides of the driving mechanism 5 and are arranged along the transverse direction. The two water spray frames 3 are respectively connected to the corresponding transmission mechanisms 4. The driving mechanism 5 simultaneously drives the two transmission mechanisms 4 to drive the two water spray frames 3 to perform water spraying and cleaning on the photovoltaic panel units 1 on both sides of the non-power generation area. By arranging a driving mechanism 5 in the middle of the photovoltaic system to drive the two transmission mechanisms 4 to drive the two water spray frames 3 to flush and clean the photovoltaic panel units 1 on both sides, the cleaning requirements of a photovoltaic system with a large transverse span are met, the cleaning efficiency is improved, and the simplest straight-line flushing and cleaning method is adopted in the present invention, greatly reducing the cleaning difficulty, simplifying the structure of the cleaning device, and reducing the cost.

[0034] In this embodiment, the water spray frame 3 includes a water spray pipe 31 and support seats 32 fixedly installed at both ends of the water spray pipe 31. The support seats 32 are slidably installed on the photovoltaic panel unit 1 and are connected to the transmission mechanism 4. Its structure is simple and easy to manufacture.

[0035] In this embodiment, rollers 321 slidably connected to the photovoltaic panel unit 1 are installed at the bottom of the support seats 32. The installation of the rollers 321 facilitates the movement of the water spray frame 3 on the photovoltaic panel unit 1.

[0036] In this embodiment, the transmission mechanism 4 includes a driven roller 41 and two steel wire ropes 42. The driven roller 41 is arranged along the longitudinal direction at the end side of the roof 2. One ends of the two steel wire ropes 42 are wound around the driven roller 41, and the other ends are connected to the driving mechanism 5. The two steel wire ropes 42 are also respectively connected to the two support seats 32. In this structure, the water spray frame 3 is moved by the cooperation of the steel wire rope 42 and the driven roller 41 for flushing and cleaning. Its structure is simple and the cost is low.

[0037] In this embodiment, the driving mechanism 5 includes a driving motor 51, a commutator 52, two gears 53, two belts 54 and two driving shafts 55. The two gears 53 are respectively installed on the output ends of the driving motor 51 and the commutator 52 and are engaged with each other. The two driving shafts 55 are movably connected to the non-power generation area in the longitudinal direction through bearings. One end of one of the two belts 54 is wound around the output end of the driving motor 51 and the other end is wound around one driving shaft 55, and one end of the other belt 54 is wound around the output end of the commutator 52 and the other end is wound around the other driving shaft 55. Each steel wire rope 42 is wound around the corresponding driving shaft 55. In this structure, by arranging the gears 53, the commutator 52 and the belts 54, the two driving shafts 55 are driven to rotate in opposite directions, so that the two water spraying frames 3 are driven by the two transmission mechanisms 5 to flush and clean the photovoltaic panel units 1 on both sides synchronously.

[0038] Embodiment 2: As Figure 4 and Figure 5 shown, the second embodiment of the photovoltaic system cleaning device of the present invention is basically the same as Embodiment 1, except that: In the photovoltaic system cleaning device of this embodiment, the photovoltaic system includes a photovoltaic panel unit 1. The photovoltaic panel unit 1 is paved on the roof 2 and has a slope. The slope direction is defined as the longitudinal direction, and the direction horizontally perpendicular to the longitudinal direction is defined as the transverse direction. The cleaning device includes a driving mechanism 5, a plurality of water spraying frames 3 and a transmission mechanism 4 matching the number of the water spraying frames 3. The driving mechanism 5 is arranged on the ridge of the roof 2. Each transmission mechanism 4 is arranged on both sides of the ridge and is arranged in the transverse direction. Each water spraying frame 3 is respectively connected to the corresponding transmission mechanism 4. The driving mechanism 5 simultaneously drives each transmission mechanism 4 to drive each water spraying frame 3 to spray and clean the photovoltaic panel units 1 on both sides of the ridge in the transverse direction. By arranging a driving mechanism 5 on the ridge to drive the two transmission mechanisms 4 to drive the two water spraying frames 3 to flush and clean the photovoltaic panel units 1 on both sides of the ridge, the present invention realizes that the cleaning device crosses the ridge to clean the photovoltaic panel units 1, without manual handling, saving time and effort, improving the cleaning efficiency, and the present invention adopts the simplest straight-line flushing and cleaning method, greatly reducing the cleaning difficulty, simplifying the structure of the cleaning device, and reducing the cost.

[0039] In this embodiment, the driving mechanism 5 is arranged at the end of the ridge, and the driving mechanism 5 drives the two transmission mechanisms 4 to drive the two water spraying frames 3 to spray and clean the photovoltaic panel units 1 on both sides of the ridge.

[0040] In this embodiment, the transmission mechanism 4 includes a driven roller 41 and two steel wire ropes 42. The driven roller 41 is arranged longitudinally at the end side of the roof 2 away from the driving mechanism 5. One end of each of the two steel wire ropes 42 is wound around the driven roller 41, and the other end is connected to the driving mechanism 5. The two steel wire ropes 42 are also respectively connected to the two support seats 32. In this structure, the water spraying frame 3 is driven to move by the cooperation of the steel wire rope 42 and the driven roller 41 for flushing and cleaning, and the structure is simple and the cost is low.

[0041] In this embodiment, the driving mechanism 5 includes a driving motor 51, two belts 54 and two driving shafts 55. The two driving shafts 55 are movably connected to the end side of the roof 2 longitudinally through bearings. One end of each of the two belts 54 is wound around the output end of the driving motor 51, and the other end is respectively connected to the two driving shafts 55. In this structure, the driving motor 51 drives the two driving shafts 55 to rotate synchronously through the two belts 54, so as to drive the transmission mechanism 4 to drive the corresponding water spraying frame 3 to flush and clean the photovoltaic panel units 1 on both sides of the roof ridge.

[0042] Embodiment 3: As Figure 6 and Figure 7 shown, the third embodiment of the photovoltaic system cleaning device of the present invention is basically the same as Embodiment 2, and the difference is only that: In this embodiment, the driving mechanism 5 is arranged in the middle of the roof ridge. The driving mechanism 5 is provided with transmission mechanisms 4 on both sides. The driving mechanism 5 drives each transmission mechanism 4 to drive each water spraying frame 3 to spray water and clean the photovoltaic panel units 1 on both sides of the roof ridge. In this structure, the driving mechanism 5 is arranged in the middle of the roof ridge, and the transmission mechanisms 4 are also arranged on both sides of the driving mechanism 5, so that the cleaning device can not only cross the roof ridge for flushing and cleaning, but also meet the cleaning requirements of the roof photovoltaic system with a large lateral span.

[0043] In this embodiment, the driving mechanism 5 includes a driving motor 51, a commutator 52, two gears 53, four belts 54 and four driving shafts 55. The two gears 53 are respectively installed on the output ends of the driving motor 51 and the commutator 52 and are engaged with each other. Each pair of the driving shafts 55 is paired and movably connected to the non-power generation area in the middle of the roof 2 on both sides of the roof ridge longitudinally through bearings. One end of each of the two belts 54 in each belt 54 is wound around the output end of the driving motor 51, and the other end is respectively wound around the two driving shafts 55 on both sides of the roof ridge. The other end of the other two belts 54 is wound around the output end of the commutator 52, and the other end is respectively wound around the other two driving shafts 55 on both sides of the roof ridge. In this structure, by using the gears 53, belts 54 and commutator 52, the driving motor 51 can drive multiple driving shafts 55 to rotate simultaneously, so as to drive each transmission mechanism 4 to drive the corresponding water spraying frame 3 to move for flushing and cleaning, reducing the cost and improving the efficiency.

[0044] Although the present invention has been disclosed above in its preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A photovoltaic system cleaning device, the photovoltaic system comprising a photovoltaic panel unit (1), the photovoltaic panel unit (1) having a slope, the slope direction being defined as a longitudinal direction, and a direction horizontally perpendicular to the longitudinal direction being defined as a transverse direction, characterized in that: The cleaning device comprises two water spray racks (3), two transmission mechanisms (4) and a driving mechanism (5); the driving mechanism (5) is arranged on a non-power generation area in the middle of a photovoltaic system; the two transmission mechanisms (4) are arranged on both sides of the driving mechanism (5) and arranged in a transverse direction; the two water spray racks (3) are respectively connected to corresponding transmission mechanisms (4); the driving mechanism (5) simultaneously drives the two transmission mechanisms (4) to drive the two water spray racks (3) to spray water and clean the photovoltaic panel units (1) on both sides of the non-power generation area in a transverse direction.

2. The photovoltaic system cleaning device according to claim 1, characterized in that: The water spray frame (3) comprises a water spray pipe (31) and support seats (32) fixedly mounted on both ends of the water spray pipe (31); the support seats (32) are slidably mounted on the photovoltaic panel unit (1) and connected to the transmission mechanism (4).

3. The photovoltaic system cleaning device according to claim 2, characterized in that: A roller (321) slidably connected to the photovoltaic panel unit (1) is installed at the bottom of the support seat (32).

4. The photovoltaic system cleaning device according to claim 3, characterized in that: The transmission mechanism (4) comprises a driven drum (41) and two steel wires (42), wherein the driven drum (41) is arranged at the end side of the roof (2) along the longitudinal direction, one end of the two steel wires (42) is wound around the driven drum (41), and the other end is connected to the driving mechanism (5), and the two steel wires (42) are also respectively connected to two support seats (32).

5. The photovoltaic system cleaning device according to claim 4, characterized in that: The driving mechanism (5) comprises a driving motor (51), a commutator (52), two gears (53), two belts (54) and two driving shafts (55); the two gears (53) are respectively mounted on the output ends of the driving motor (51) and the commutator (52) and mesh with each other; the two driving shafts (55) are movably connected to the non-power generation area along the longitudinal direction via bearings; one end of one of the two belts (54) is wound around the output end of the driving motor (51) and the other end is wound around one driving shaft (55); one end of the other belt (54) is wound around the output end of the commutator (52) and the other end is wound around the other driving shaft (55); and each of the steel wire ropes (42) is wound around the corresponding driving shaft (55).

6. A photovoltaic system cleaning device, the photovoltaic system comprising a photovoltaic panel unit (1), the photovoltaic panel unit (1) being installed on a roof (2) and having a slope, wherein the slope direction is defined as a longitudinal direction, and a direction horizontally perpendicular to the longitudinal direction is defined as a transverse direction, wherein: The cleaning device comprises a driving mechanism (5), a plurality of water spray racks (3), and a transmission mechanism (4) matching the number of the water spray racks (3); the driving mechanism (5) is arranged on the ridge of the roof (2); the transmission mechanisms (4) are arranged on both sides of the ridge and arranged in a transverse direction; the water spray racks (3) are respectively connected to corresponding transmission mechanisms (4); the driving mechanism (5) simultaneously drives the transmission mechanisms (4) to drive the water spray racks (3) to spray water and clean the photovoltaic panel units (1) on both sides of the ridge in a transverse direction.

7. The photovoltaic system cleaning device according to claim 6, characterized in that: The driving mechanism (5) is arranged at the end of the roof ridge, and the driving mechanism (5) drives the two transmission mechanisms (4) to drive the two water spray racks (3) to spray water to clean the photovoltaic panel units (1) on both sides of the roof ridge.

8. The photovoltaic system cleaning device according to claim 7, characterized in that: The water spray frame (3) comprises a water spray pipe (31) and support seats (32) fixedly mounted on both ends of the water spray pipe (31); the support seats (32) are slidably mounted on the photovoltaic panel unit (1) and connected to the transmission mechanism (4).

9. The photovoltaic system cleaning device according to claim 8, characterized in that: A roller (321) slidably connected to the photovoltaic panel unit (1) is installed at the bottom of the support seat (32).

10. The photovoltaic system cleaning device according to claim 9, characterized in that: The transmission mechanism (4) comprises a driven drum (41) and two steel wires (42); the driven drum (41) is arranged on the end side of the roof (2) away from the driving mechanism (5) in the longitudinal direction; one end of the two steel wires (42) is wound around the driven drum (41) and the other end is connected to the driving mechanism (5); the two steel wires (42) are also respectively connected to two support seats (32).

11. The photovoltaic system cleaning device according to claim 10, characterized in that: The driving mechanism (5) comprises a driving motor (51), two belts (54) and two driving shafts (55); the two driving shafts (55) are movably connected to the end side of the roof (2) in the longitudinal direction via bearings; one end of the two belts (54) is wound around the output end of the driving motor (51), and the other end is connected to the two driving shafts (55) respectively.

12. The photovoltaic system cleaning device according to claim 6, characterized in that: The driving mechanism (5) is arranged in the middle of the roof ridge, and transmission mechanisms (4) are arranged on both sides of the driving mechanism (5). The driving mechanism (5) drives each transmission mechanism (4) to drive each water spraying frame (3) to spray water to clean the photovoltaic panel units (1) on both sides of the roof ridge.

13. The photovoltaic system cleaning device according to claim 12, characterized in that: The water spray frame (3) comprises a water spray pipe (31) and support seats (32) fixedly mounted on both ends of the water spray pipe (31); the support seats (32) are slidably mounted on the photovoltaic panel unit (1) and connected to the transmission mechanism (4).

14. The photovoltaic system cleaning device according to claim 13, characterized in that: A roller (321) slidably connected to the photovoltaic panel unit (1) is installed at the bottom of the support seat (32).

15. The photovoltaic system cleaning device according to claim 14, characterized in that: The transmission mechanism (4) comprises a driven drum (41) and two steel wires (42); the driven drum (41) is arranged on the end side of the roof (2) away from the driving mechanism (5) in the longitudinal direction; one end of the two steel wires (42) is wound around the driven drum (41) and the other end is connected to the driving mechanism (5); the two steel wires (42) are also respectively connected to two support seats (32).

16. The photovoltaic system cleaning device according to claim 15, characterized in that: The driving mechanism (5) comprises a driving motor (51), a commutator (52), two gears (53), four belts (54) and four driving shafts (55); the two gears (53) are respectively mounted on the output ends of the driving motor (51) and the commutator (52) and mesh with each other; the driving shafts (55) are paired and movably connected to the non-power generation area in the middle of the roof (2) on both sides of the ridge in the longitudinal direction through bearings; one end of two of the belts (54) is wound around the output end of the driving motor (51) and the other end is respectively wound around the two driving shafts (55) on both sides of the ridge; one end of the other two belts (54) is wound around the output end of the commutator (52) and the other end is respectively wound around the other two driving shafts (55) on both sides of the ridge.

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