Photovoltaic cleaning system

Abstract

The utility model relates to a photovoltaic cleaning system which comprises a water pump communicated with a water source and at least two cleaning devices connected to an outlet of the water pump in parallel, and each cleaning device comprises a pipe rolling device and a cleaning tool. The cleaning tool comprises a housing, a telescopic handle, roller assemblies, a front cleaning assembly, a rear cleaning assembly and a water retaining scraping strip, the telescopic handle is hinged to the upper portion of the housing, the roller assemblies are arranged at the four corners of the lower portion of the housing, and the front cleaning assembly and the rear cleaning assembly are arranged in the front and the rear of the housing respectively. A water retaining scraping strip is arranged in the housing between the front cleaning assembly and the rear cleaning assembly; the front cleaning assembly comprises a cleaning pipe and a cleaning roller arranged on the housing in a lifting mode, a plurality of water outlet holes are formed in the side wall of the cleaning pipe and face the cleaning roller, and the rear cleaning assembly and the front cleaning assembly are the same in structure. According to the photovoltaic panel cleaning device, the cleaning efficiency can be improved, meanwhile, the cleaning effect can be improved through the front cleaning assembly and the rear cleaning assembly, it is guaranteed that the photovoltaic panel is evenly stressed during cleaning, and influences on the photovoltaic panel are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a photovoltaic cleaning system. Background Art

[0002] Photovoltaic panels are devices that generate direct current (DC) electricity when exposed to sunlight. They require regular cleaning because contaminants such as dust and gum can reduce their efficiency, increase their temperature, and shorten their lifespan. Therefore, it's crucial to regularly clean the surface of the panels to ensure they remain clean, maintaining efficiency and longevity.

[0003] Traditional cleaning methods involve rinsing with water, wiping with a mop, or a combination of the two. For example, Patent Publication No. CN206527072U discloses a handheld photovoltaic panel cleaning device that uses a water nozzle and a cleaning cloth to clean photovoltaic panels. Another example is Patent Publication No. CN220234607U, which discloses a photovoltaic panel cleaning device for a photovoltaic power station. This device combines a water spray mechanism with a cleaning brush or scraper to clean photovoltaic panels.

[0004] Water-flushing cleaning equipment inevitably uses a water pump, but most pumps supply water to a single cleaning device, resulting in low efficiency and failing to meet the requirements for fast and efficient PV panel cleaning. Some cleaning equipment uses high-pressure water to directly impact the panels, which can damage them. Long, untidy, and irregular pipes run between the pump and the cleaning device, hindering proper cleaning.

[0005] These handheld cleaning devices inevitably apply pressure to the panels. The amount of pressure depends entirely on the operator's pressure. To ensure optimal cleaning results, gravity must be applied to the panels, which is very laborious. Furthermore, manually applying gravity will result in significant pressure on the panels, making it difficult to ensure uniform pressure, potentially leading to cracks in the panels and shortening their lifespan. Summary of the Invention

[0006] In order to solve the problems of low efficiency and poor cleaning effect of traditional cleaning equipment and the impact on photovoltaic panels, the utility model provides a photovoltaic cleaning system. The water pump can supply water to two cleaning tools at the same time, which can improve the cleaning efficiency. There are two front and rear cleaning rollers in the cleaning tool to ensure the cleaning effect. The cleaning rollers apply uniform pressure to the photovoltaic panels to avoid impact on the photovoltaic panels.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A photovoltaic cleaning system includes a water pump connected to a water source and at least two cleaning devices connected in parallel at the outlet of the water pump, which facilitates simultaneous cleaning by multiple people and improves cleaning efficiency. Each cleaning device includes a hose reel and a cleaning tool. The water pump is connected to the cleaning tool through the hose reel, which facilitates the retraction and extension of the water pipe and avoids it being scattered outside.

[0009] The cleaning tool includes a housing, a telescopic handle, a roller assembly, a front cleaning assembly, a rear cleaning assembly and a water挡水刮条. The telescopic handle is hinged above the housing, which facilitates the adjustment of the length of the cleaning tool. The roller assembly is arranged at the four corners below the housing, which facilitates the movement of the cleaning tool on the surface of the photovoltaic panel. The front cleaning assembly and the rear cleaning assembly are respectively arranged inside the housing at the front and rear, which facilitates the realization of a double cleaning effect. A water挡水刮条 is arranged inside the housing between the front cleaning assembly and the rear cleaning assembly, which facilitates separating the front cleaning assembly and the rear cleaning assembly and can also scrape water.

[0010] The front cleaning assembly includes a cleaning pipe and a cleaning roller arranged vertically and liftable on the housing. The cleaning pipe and the cleaning roller are both arranged longitudinally along the length of the housing. An inlet joint is connected to the cleaning pipe to facilitate the inlet of water into the cleaning pipe. A plurality of water outlet holes are opened on the side wall of the cleaning pipe, and the water outlet holes face the cleaning roller to facilitate uniform flushing of the cleaning roller with water. The rear cleaning assembly has the same structure as the front cleaning assembly.

[0011] Further, a three-way joint is connected to the outlet of the water pump. The water pump is connected in parallel with two cleaning devices through the three-way joint. A water pipe is wound around the hose reel. The inlet of the water pipe is connected to the three-way joint, and the outlet of the water pipe is connected to a Y-shaped pipe. The outlet of the water pipe is respectively connected to the inlet joints in the front cleaning assembly and the rear cleaning assembly through the Y-shaped pipe to facilitate supplying water to the same cleaning tool.

[0012] Further, the housing is a rectangular shell structure with an open bottom. The cross-section of the housing is an inverted "凵" shape. Ear plates are arranged above the housing. A hinge shaft is arranged at the front end of the telescopic handle. The hinge shaft is perpendicular to the telescopic handle and passes through the ear plates and is hinged to the ear plates, which facilitates the hinged installation of the housing and the telescopic handle.

[0013] Further, the housing moves on the surface of the photovoltaic panel through the roller assembly. The number of the roller assemblies is four groups, which facilitates the uniform support of the housing. Each group of roller assemblies includes two installation inclined plates and a rubber roller rotatably arranged between the two installation inclined plates. The rubber roller rolls on the surface of the photovoltaic panel to prevent wear on the surface of the photovoltaic panel.

[0014] Furthermore, the front cleaning component and the rear cleaning component are arranged symmetrically front to back, and a plurality of elastic clips are provided in the middle of the cover shell. The plurality of elastic clips are arranged in a straight line along the length direction of the cover shell, and the cross-section of the elastic clip is an inverted "U" shape. The open end of the elastic clip faces downward and the two side walls of the open end are close to each other. The water-blocking scraper strip is clamped between the plurality of elastic clips, which facilitates the detachable installation of the water-blocking scraper strip. The lower end of the water-blocking scraper strip contacts the surface of the photovoltaic panel, which facilitates the wiping operation.

[0015] Furthermore, the cleaning pipe is fixedly arranged in the cover shell, the water inlet joint is perpendicular to the cleaning pipe, the upper end of the water inlet joint extends out of the cover shell, and several water outlet holes are arranged in a straight line; the cleaning pipe and the cleaning roller are staggered up and down, and the cleaning roller is a brush roller or a sponge roller, which is convenient for providing different cleaning effects and cleaning degrees.

[0016] Furthermore, a lifting hole is vertically opened on the side wall of the cover shell, and a lifting shaft with a "T"-shaped cross-section is passed through the lifting hole. The lifting shaft moves up and down along the lifting hole. The lifting shaft and the cleaning roller are coaxially arranged to facilitate the movement of the cleaning roller. A bearing is provided at the end of the cleaning roller. The bearing is passed through the end of the lifting shaft to facilitate the rotational connection between the cleaning roller and the lifting shaft.

[0017] An adjusting screw is vertically arranged above the cover shell, the adjusting screw is threadedly connected to the cover shell, the lower end of the adjusting screw extends downward radially through the lifting shaft, and is threadedly connected to the lifting shaft, and the adjusting screw is convenient for fixing the position of the lifting shaft.

[0018] Through the above technical solution, the beneficial effects of the utility model are:

[0019] This utility model features a rational structural design, utilizing a single water pump to simultaneously supply water to two cleaning devices, improving the efficiency of photovoltaic panel cleaning. Each cleaning device includes a hose reel and cleaning tools. The hose reel prevents the hose from becoming disorganized or tangled, ensuring the neatness of the hoses and facilitating on-site cleaning operations. The cleaning tools are manually operated, and a roller assembly rapidly moves the cleaning tools across the photovoltaic panel surface. Simply pushing and pulling the cleaning tools upwards and downwards ensures uniform cleaning pressure across the panel.

[0020] This cleaning tool includes two front and rear cleaning components. These components utilize water flushing, with the water impacting a cleaning roller and then flowing toward the photovoltaic panel. The cleaning roller can be a sponge roller or a brush roller, providing different cleaning effects and ensuring thorough cleaning. A water-blocking scraper separates the front and rear cleaning components, ensuring independent operating environments, preventing water from flowing across the surface, and enabling timely scraping.

[0021] When the utility model is used, no manual pressure is applied to the cleaning tool. By adjusting the position of the cleaning roller up and down, the contact area between the cleaning roller and the surface of the photovoltaic panel can be changed. The larger the contact area, the greater the deformation of the cleaning roller, and the greater the pressure on the photovoltaic panel. At the same time, uniform pressure can be ensured to avoid the impact of uneven pressure on the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic cleaning system of the present invention.

[0023] Figure 2 This is a top view of a cleaning tool for a photovoltaic cleaning system of the present invention.

[0024] Figure 3 This is a side view of a cover of a photovoltaic cleaning system of the present invention.

[0025] Figure 4 This is a cross-sectional view of a cover of a photovoltaic cleaning system of the present invention.

[0026] Figure 5 This is a schematic diagram of the lifting and installation of a cleaning roller of a photovoltaic cleaning system of the present invention.

[0027] Figure 6 This is a schematic diagram of the application state of a photovoltaic cleaning system of the present invention. In the figure, arrow A indicates that the Y-shaped tube is connected to the water pipe outlet, and arrow B indicates the downward movement direction of the cleaning tool.

[0028] The numbers in the accompanying drawings are: 1 water source, 2 water pump, 3 cleaning equipment, 4 tee, 5 hose reel, 6 cleaning tool, 7 cover, 8 telescopic handle, 9 roller assembly, 91 mounting inclined plate, 92 rubber roller, 10 front cleaning assembly, 101 cleaning pipe, 102 cleaning roller, 11 rear cleaning assembly, 12 water scraper, 13 ear plate, 14 hinge shaft, 15 water inlet joint, 16 water outlet hole, 17 lifting hole, 18 lifting shaft, 19 bearing, 20 adjusting screw, 21 horizontal groove, 22 scale line, 23 elastic clip, 24 water pipe, 25 Y-shaped tube. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings:

[0030] like Figures 1 to 6 As shown, a photovoltaic cleaning system includes a water pump 2 connected to a water source 1 and at least two cleaning devices 3 connected in parallel to the outlet of the water pump 2. The water source 1 can be a water-filled container such as a pool or bucket, which supplies water to the water pump 2. In this embodiment, a tee 4 is connected to the outlet of the water pump 2. The water pump 2 is connected in parallel to the two cleaning devices 3 through the tee 4, thereby supplying water to the two cleaning devices 3. The two cleaning devices 3 can simultaneously clean the photovoltaic panels, thereby improving work efficiency.

[0031] Each cleaning device 3 includes a hose reel 5 and a cleaning tool 6. The water pump 2 is connected to the cleaning tool 6 through the hose reel 5. Specifically, a water pipe 24 is wound around the hose reel 5. The inlet of the water pipe 24 is connected to the tee 4, so that water is introduced into the water pipe 24 on the hose reel 5. The outlet of the water pipe 24 is connected to the cleaning tool 6, and water can be supplied to the cleaning tool 6. Figure 1 The purpose of using the hose reel 5 is to regularly retract and release the water hose 24 to prevent the water hose 24 from being scattered outside.

[0032] The cleaning tool 6 includes a housing 7, a telescopic handle 8, a roller assembly 9, a front cleaning assembly 10, a rear cleaning assembly 11, and a water-blocking scraper 12. The housing 7 is a rectangular shell structure with an open bottom. The telescopic handle 8 is hingedly connected to the top of the housing 7. The telescopic handle 8 is a telescopic rod structure, which allows the length of the entire cleaning tool 6 to be adjusted to accommodate photovoltaic panels of different sizes, avoiding the situation where the cleaning tool 6 is a fixed length and difficult to thoroughly clean longer photovoltaic panels.

[0033] When the telescopic handle 8 is installed, two ear plates 13 are provided above the cover 7. At the same time, a hinge shaft 14 is provided at the front end of the telescopic handle 8. The hinge shaft 14 is perpendicular to the telescopic handle 8 and passes through the ear plates 13 and is hinged to the ear plates 13. Thus, the telescopic handle 8 can rotate relative to the cover 7, and the angle between the telescopic handle 8 and the cover 7 can be changed, such as Figure 2 shown.

[0034] Roller assemblies 9 are provided at the four corners below the housing 7. Four sets of roller assemblies 9 are provided to support the housing 7. The housing 7 is moved across the surface of the photovoltaic panel via the roller assemblies 9. Each set of roller assemblies 9 includes two mounting ramps 91 and a rubber roller 92 rotatably disposed between the two mounting ramps 91. The rubber roller 92 rolls across the surface of the photovoltaic panel, ensuring contact with a larger area of ​​the panel while minimizing wear on the panel surface.

[0035] The front cleaning assembly 10 and the rear cleaning assembly 11 are respectively arranged in the front and rear of the housing 7. The front cleaning assembly 10 and the rear cleaning assembly 11 are arranged symmetrically. Figure 3 and Figure 4 As shown. Both the front cleaning assembly 10 and the rear cleaning assembly 11 can be used to clean photovoltaic panels. The front cleaning assembly 10 and the rear cleaning assembly 11 can be used separately or in combination. Here, the portion closer to the telescopic handle 8 is defined as the front cleaning assembly 10, and the portion farther from the telescopic handle 8 is defined as the rear cleaning assembly 11. This way, when a worker holds the telescopic handle 8 to operate the cleaning tool 6, the front cleaning assembly 10 is closer to the worker, while the rear cleaning assembly 11 is farther from the worker.

[0036] The rear cleaning component 11 and the front cleaning component 10 have the same structure. Take the front cleaning component 10 as an example: the front cleaning component 10 includes a cleaning pipe 101 and a cleaning roller 102 which is lifted and lowered on the cover shell 7. The cleaning pipe 101 and the cleaning roller 102 are both arranged along the length direction of the cover shell 7, and the cleaning pipe 101 and the cleaning roller 102 are staggered up and down.

[0037] The cleaning pipe 101 is fixedly mounted within the housing 7 and connected to a water inlet connector 15. The water inlet connector 15 is perpendicular to the cleaning pipe 101, and its upper end extends out of the housing 7. Water can be injected into the cleaning pipe 101 through the water inlet connector 15. Since the front cleaning assembly 10 and the rear cleaning assembly 11 have the same structure, the cleaning tool 6 has two water inlet connectors 15. In this way, when the hose reel 5 is connected to the cleaning tool 6, the outlet of the water pipe 24 is connected to a Y-shaped pipe 25, which connects the outlet of the water pipe 24 to the water inlet connectors 15 in the front cleaning assembly 10 and the rear cleaning assembly 11 respectively through the Y-shaped pipe 25.

[0038] A plurality of water outlet holes 16 are provided on the side wall of the cleaning pipe 101. The plurality of water outlet holes 16 are arranged in a straight line. The water outlet holes 16 face the cleaning roller 102. Water first flows to the cleaning roller 102 and then flows to the surface of the photovoltaic panel, which can prevent the water flow from directly impacting the surface of the photovoltaic panel.

[0039] The cleaning roller 102 can be a brush roller or a sponge roller. The brush roller can be used for rough cleaning, while the sponge roller can be used for fine cleaning. The purpose of the lifting and lowering setting of the cleaning roller 102 is to apply different pressures to the surface of the photovoltaic panel to change the cleaning degree, and to ensure the uniformity of the pressure to avoid affecting the service life of the photovoltaic panel.

[0040] When the cleaning roller 102 is installed, lifting holes 17 are vertically opened on the corresponding two side walls of the cover shell 7. The lifting holes 17 are waist-shaped holes. A lifting shaft 18 with a "T"-shaped cross-section is passed through each lifting hole 17. The lifting shaft 18 moves up and down along the lifting hole 17. The end of the lifting shaft 18 with a larger diameter is against the outer wall of the cover shell 7, which can limit the lifting shaft 18 to prevent it from excessive axial movement into the cover shell 7.

[0041] The lifting shaft 18 and the cleaning roller 102 are coaxially arranged, and the two lifting shafts 18 are used to support the cleaning roller 102. A bearing 19 is provided at the end of the cleaning roller 102, and the bearing 19 is passed through the end of the lifting shaft 18. Then, on the basis of the fixed lifting shaft 18, the cleaning roller 102 can rotate. Figure 5As shown. With lifting shafts 18 installed at both ends of the cleaning roller 102, the cleaning roller 102 can move up and down along the lifting hole 17. To secure the position of the cleaning roller 102, an adjustment screw 20 is vertically positioned above the housing 7. The adjustment screw 20 is threadedly connected to the housing 7. The lower end of the adjustment screw 20 extends downward radially through the lifting shaft 18 and is threadedly connected to the lifting shaft 18. This allows the adjustment screw 20 to secure the position of the lifting shaft 18, effectively placing it in mid-air.

[0042] The lifting and lowering adjustment operation of the cleaning roller 102 is as follows: first fix the cleaning roller 102 so that it does not move, then twist the adjusting screw 20 to disengage it from the lifting shaft 18, and then adjust the lifting shaft 18 up and down. In order to facilitate the position adjustment of the lifting shaft 18, a transverse groove 21 is opened on the end face of the large diameter end of the lifting shaft 18, and a scale line 22 is set on the side wall of the cover 7 on the side of the lifting hole 17. The vertical position of the lifting shaft 18 is adjusted according to the indication of the transverse groove 21 and the scale line 22. When the lifting shaft 18 moves, the cleaning roller 102 moves up and down with it. After moving to the corresponding height position, the adjusting screw 20 is twisted in the opposite direction so that it is threadedly connected to the lifting shaft 18 again, and the adjusting screw 20 is used to support the cleaning roller 102.

[0043] A water-blocking scraper 12 is provided in the housing 7 between the front cleaning assembly 10 and the rear cleaning assembly 11. The water-blocking scraper 12 can scrape water on the one hand and also play a barrier role on the other hand to prevent the water flow of the front cleaning assembly 10 and the rear cleaning assembly 11 from splashing each other when they are operating, ensuring that both have relatively independent working spaces.

[0044] When the water-blocking scraper 12 is installed, a plurality of elastic clips 23 are arranged in the middle of the cover 7. The plurality of elastic clips 23 are arranged in a straight line along the length direction of the cover 7. The cross-section of the elastic clip 23 is an inverted "U" shape. The open end of the elastic clip 23 faces downward, and the two side walls of the open end are close to each other. The water-blocking scraper 12 is clamped between the plurality of elastic clips 23, thereby realizing the detachable installation of the water-blocking scraper 12, and the lower end of the water-blocking scraper 12 contacts the surface of the photovoltaic panel.

[0045] The principle of the utility model is as follows: after the water pump 2 is connected to the water source 1, the water pump 2 is started. The water pump adopts a pressure switch type water pump. The water pump 2 supplies water to two cleaning devices 3. Each worker holds a cleaning tool 6 and moves it from top to bottom on the surface of the photovoltaic panel. The worker only applies dragging, pushing and pulling force to the cleaning tool 6 to make it move, and does not apply pressure to the cleaning tool 6.

[0046] The cleaning roller 102 of the front cleaning component 10 in the cleaning tool 6 adopts a brush roller, and the cleaning roller 102 of the rear cleaning component 11 adopts a sponge roller. Figure 6As shown. In this way, when the cleaning tool 6 moves from top to bottom and contacts the surface of the photovoltaic panel, the water flow hits the brush roller and then flows to the photovoltaic panel, and the surface of the photovoltaic panel can be cleaned once by the brush roller. At the same time, the water flow also hits the sponge roller and then flows to the photovoltaic panel, and the surface of the photovoltaic panel can be cleaned a second time and more delicately by the sponge roller, which can improve the cleaning effect. The water used to clean the brush roller and the water used to clean the sponge roller are separated by the water-blocking scraper 12 to avoid cross-flow and also to scrape the water clean. Since two people operate the cleaning tool 6, the cleaning efficiency can be improved.

[0047] As the cleaning tool 6 moves across the surface of the photovoltaic panel, it can be flexibly rolled on the panel by the roller assembly 9. Workers can apply downward and upward forces to move the cleaning tool 6. If force is desired to ensure a more effective cleaning, this can be achieved by lowering the cleaning roller 102. As the cleaning roller 102 descends, its contact area with the photovoltaic panel increases, causing a greater degree of deformation. This in turn applies a certain, uniform force to the panel, improving the cleaning effect.

[0048] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A photovoltaic cleaning system, characterized in that: It comprises a water pump (2) connected to a water source (1) and at least two cleaning devices (3) connected in parallel to the outlet of the water pump (2), each cleaning device (3) comprising a hose reel (5) and a cleaning tool (6), and the water pump (2) is connected to the cleaning tool (6) via the hose reel (5); The cleaning tool (6) comprises a housing (7), a telescopic handle (8), a roller assembly (9), a front cleaning assembly (10), a rear cleaning assembly (11), and a water-blocking scraper (12); the telescopic handle (8) is hingedly connected to the top of the housing (7); the roller assemblies (9) are arranged at the four corners below the housing (7); the front cleaning assembly (10) and the rear cleaning assembly (11) are respectively arranged in the front and rear of the housing (7); and the water-blocking scraper (12) is arranged in the housing (7) between the front cleaning assembly (10) and the rear cleaning assembly (11); The front cleaning assembly (10) comprises a cleaning pipe (101) and a cleaning roller (102) which is lifted and lowered on the housing (7). The cleaning pipe (101) and the cleaning roller (102) are both arranged along the length direction of the housing (7). The cleaning pipe (101) is connected to a water inlet joint (15). A plurality of water outlet holes (16) are opened on the side wall of the cleaning pipe (101), and the water outlet holes (16) face the cleaning roller (102). The rear cleaning assembly (11) and the front cleaning assembly (10) have the same structure.

2. A photovoltaic cleaning system according to claim 1, characterized in that: The outlet of the water pump (2) is connected to a tee (4), and the water pump (2) is connected in parallel to two cleaning devices (3) via the tee (4). A water pipe (24) is wound around the hose reel (5), and the inlet of the water pipe (24) is connected to the tee (4). The outlet of the water pipe (24) is connected to a Y-shaped pipe (25), and the outlet of the water pipe (24) is connected to the water inlet joints (15) in the front cleaning component (10) and the rear cleaning component (11) respectively through the Y-shaped pipe (25).

3. A photovoltaic cleaning system according to claim 1, characterized in that: The cover shell (7) is a rectangular shell structure with an open bottom. An ear plate (13) is provided above the cover shell (7). A hinge shaft (14) is provided at the front end of the telescopic handle (8). The hinge shaft (14) is perpendicular to the telescopic handle (8). The hinge shaft (14) is passed through the ear plate (13) and is hinged to the ear plate (13).

4. A photovoltaic cleaning system according to claim 2, characterized in that: The cover (7) moves on the surface of the photovoltaic panel via a roller assembly (9). The roller assemblies (9) are four in number. Each roller assembly (9) comprises two mounting inclined plates (91) and a rubber roller (92) rotatably arranged between the two mounting inclined plates (91). The rubber roller (92) rolls on the surface of the photovoltaic panel.

5. A photovoltaic cleaning system according to claim 2, characterized in that: The front cleaning assembly (10) and the rear cleaning assembly (11) are arranged symmetrically front to back, and a plurality of elastic clips (23) are provided in the middle of the cover shell (7). The plurality of elastic clips (23) are arranged in a straight line along the length direction of the cover shell (7), and the cross section of the elastic clips (23) is in an inverted "U" shape. The open end of the elastic clip (23) faces downward, and the two side walls of the open end are close to each other. The plurality of elastic clips (23) clamp the water-blocking scraper (12) between them, and the lower end of the water-blocking scraper (12) contacts the surface of the photovoltaic panel.

6. A photovoltaic cleaning system according to claim 2, characterized in that: The cleaning pipe (101) is fixedly arranged in the housing (7); the water inlet joint (15) is perpendicular to the cleaning pipe (101); the upper end of the water inlet joint (15) extends out of the housing (7); and a plurality of water outlet holes (16) are arranged in a straight line; the cleaning pipe (101) and the cleaning roller (102) are arranged in an upper and lower staggered manner; the cleaning roller (102) is a brush roller or a sponge roller.

7. A photovoltaic cleaning system according to claim 2, characterized in that: A lifting hole (17) is vertically opened on the side wall of the cover shell (7), and a lifting shaft (18) with a "T"-shaped cross section is passed through the lifting hole (17). The lifting shaft (18) moves up and down along the lifting hole (17). The lifting shaft (18) and the cleaning roller (102) are coaxially arranged. A bearing (19) is provided at the end of the cleaning roller (102), and the bearing (19) is passed through the end of the lifting shaft (18); An adjusting screw (20) is vertically arranged above the cover shell (7), and the adjusting screw (20) is threadedly connected to the cover shell (7). The lower end of the adjusting screw (20) extends downward, radially passes through the lifting shaft (18), and is threadedly connected to the lifting shaft (18).

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