Photovoltaic panel cleaning device

Abstract

The application discloses a photovoltaic panel cleaning device, which comprises a fixing frame, a moving frame, a spraying assembly, a cleaning assembly and a driving assembly, the fixing frame is connected with a mounting frame, the moving frame is movably connected with the fixing frame, the spraying assembly comprises a main pipeline and a plurality of nozzles which are arranged along the extension direction of the main pipeline at intervals, the nozzles are arranged towards the photovoltaic panel, the main pipeline is connected with the moving frame, and the extension direction of the main pipeline is perpendicular to the moving direction of the moving frame relative to the fixing frame; the cleaning assembly comprises a cylinder brush for cleaning the photovoltaic panel, the extension direction of the cylinder brush is consistent with the extension direction of the main pipeline, and the cylinder brush is rotatably connected with the moving frame; the driving assembly is used for driving the cylinder brush to rotate relative to the moving frame, and / or the driving assembly is used for moving the moving frame relative to the fixing frame. The photovoltaic panel cleaning device of the embodiment of the application can be automatically started regularly, and the photovoltaic panel can be automatically cleaned to remove dirt and dust on the surface of the photovoltaic panel, so that the power generation efficiency of the photovoltaic panel is improved.

Description

Technical Field

[0001] This invention relates to the technical field of photovoltaic power generation, and more specifically to a photovoltaic panel cleaning device. Background Technology

[0002] To remove dirt and dust from the surface of photovoltaic panels and ensure they maintain optimal working condition, thereby improving their ability to absorb sunlight and thus increasing power generation efficiency, regular cleaning of photovoltaic panels is necessary. Currently, photovoltaic panels are typically cleaned manually using high-pressure washing or manual cleaning methods. However, for locations that are difficult for personnel to reach, such as rooftops or ponds, manual cleaning is challenging and costly. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a photovoltaic panel cleaning device that can be automatically activated periodically to clean the photovoltaic panels, thereby removing dirt and dust from the surface of the photovoltaic panels and improving the power generation efficiency of the photovoltaic panels.

[0005] The photovoltaic panel cleaning device of this invention includes a fixed frame, a movable frame, a spray assembly, a cleaning assembly, and a drive assembly. The fixed frame is connected to the mounting frame, and the movable frame is movably connected to the fixed frame. The spray assembly includes a main pipe and a plurality of nozzles spaced apart along the extension direction of the main pipe, with the nozzles facing the photovoltaic panel. The main pipe is connected to the movable frame, and the extension direction of the main pipe is perpendicular to the movement direction of the movable frame relative to the fixed frame. The cleaning assembly includes a cylindrical brush for cleaning the photovoltaic panel, the extension direction of which is consistent with the extension direction of the main pipe, and the cylindrical brush is rotatably connected to the movable frame. The drive assembly is used to drive the cylindrical brush to rotate relative to the movable frame, and / or the drive assembly is used to move the movable frame relative to the fixed frame.

[0006] In some embodiments, the drive assembly includes a drive member, a drive shaft, a first bevel gear, and a second bevel gear. The drive member is used to drive the drive shaft to rotate. The drive shaft is rotatably connected to the movable frame. The first bevel gear is connected to the drive shaft, and the second bevel gear is connected to the tube brush.

[0007] In some embodiments, the drive assembly further includes a moving gear and a rack that mesh with each other, the moving gear being connected to the drive shaft and the rack being connected to the fixed frame.

[0008] In some embodiments, a stop bar is provided on the upper side of the rack, the projection of the stop bar on the horizontal plane can completely cover the projection of the rack on the horizontal plane, and the stop bar is connected to the fixing frame.

[0009] In some embodiments, the photovoltaic panel cleaning device further includes support wheels and guide rails, the guide rails being connected to the fixed frame, the support wheels being connected to the movable frame, and the support wheels cooperating with the guide rails.

[0010] In some embodiments, the number of support wheels is multiple, with at least two support wheels arranged on both sides of the photovoltaic panel along the extension direction of the brush.

[0011] In some embodiments, the photovoltaic panel cleaning device further includes a position sensor and a controller. The number of position sensors is multiple, at least one of the position sensors is located at one end of the guide rail and connected to the fixed frame, and at least one of the position sensors is located at the other end of the guide rail and connected to the fixed frame. The position sensors and the drive unit are both connected to the controller. The position sensors are used to detect the position of the moving frame and transmit a position signal to the controller. The controller controls the operation of the drive unit based on the position signal.

[0012] In some embodiments, the cylindrical brush includes a cylindrical body, a brush body, and a spring. The cylindrical body is connected to the movable frame, and the brush body is slidably connected to the cylindrical body. There are multiple brush bodies, and the cross-section of each brush body is arc-shaped. The multiple brush bodies are arranged circumferentially along the cylindrical body. One end of the spring is connected to the cylindrical body, and the other end of the spring is connected to the brush body. The spring is used to apply a radial force to the brush body along the cylindrical body so that the brush body abuts against the photovoltaic panel.

[0013] In some embodiments, the cylinder has a groove, the brush body is connected to a slider, the slider is slidably inserted into the groove, and the spring is disposed in the groove.

[0014] In some embodiments, the spray assembly further includes a water tank and a water pump, both of which are connected to the movable frame. The inlet of the water pump is connected to the water tank, and the outlet of the water pump is connected to the main pipeline.

[0015] The photovoltaic panel cleaning device of this invention first sprays water onto the photovoltaic panel using nozzles. Then, the drive unit moves the moving frame while simultaneously rotating a cylindrical brush. The brush bristles contact the upper surface of the photovoltaic panel, and the rotation of the brush cleans the upper surface. Both the brush and nozzles move with the moving frame, thus achieving complete cleaning of the entire photovoltaic panel. This photovoltaic panel cleaning device can automatically start periodically to clean the photovoltaic panels, removing dirt and dust from their surface, thereby improving the photovoltaic panel's power generation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic panel cleaning device according to an embodiment of the present invention.

[0017] Figure 2 This is a partial structural schematic diagram of a photovoltaic panel cleaning device according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 This is a schematic diagram of the structure of the cylindrical brush of a photovoltaic panel cleaning device according to an embodiment of the present invention.

[0020] Figure label: 100. Photovoltaic panel cleaning device; 1. Fixture; 2. Movable frame; 21. Mounting housing; 3. Sprinkler assembly; 31. Main pipeline; 32. Nozzle; 33. Water pump; 34. Water tank; 4. Brush barrel; 41. Brush shaft; 42. Brush barrel; 421. Slide groove; 43. Brush body; 431. Slide barrel; 44. Spring; 5. Drive assembly; 51. Servo motor; 52. Drive shaft; 53. First bevel gear; 54. Second bevel gear; 55. Moving gear; 56. Rack; 561. Stop bar; 61. Support wheel; 62. Guide rail; 7. Position sensor; 71. Bracket; 8. Storage battery; 201. Photovoltaic panel body; 202. Mounting frame. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1 and Figure 2As shown, the photovoltaic panel includes a mounting frame 202 and a photovoltaic panel body 201. The mounting frame 202 is used to support the photovoltaic panel body 201 so that the photovoltaic panel body 201 can be installed on the roof, pond or other locations. Multiple photovoltaic panel bodies 201 are arranged in a rectangular shape, and the photovoltaic panel has a length direction and a width direction.

[0023] like Figure 1 and Figure 2 As shown, the photovoltaic panel cleaning device 100 of this embodiment includes a fixed frame 1, a movable frame 2, a spray assembly 3, a cleaning assembly, and a drive assembly 5. The fixed frame 1 is connected to the mounting frame 202, and the movable frame 2 is movably connected to the fixed frame 1. The spray assembly 3 includes a main pipe 31 and a plurality of nozzles 32 arranged at intervals along the extension direction of the main pipe 31. The nozzles 32 are arranged facing the photovoltaic panel. The main pipe 31 is connected to the movable frame 2, and the extension direction of the main pipe 31 is perpendicular to the movement direction of the movable frame 2 relative to the fixed frame 1. The cleaning assembly includes a cylindrical brush 4 for cleaning the photovoltaic panel. The extension direction of the cylindrical brush 4 is consistent with the extension direction of the main pipe 31, and the cylindrical brush 4 is rotatably connected to the movable frame 2. The drive assembly 5 is used to drive the cylindrical brush 4 to rotate relative to the movable frame 2, and / or the drive assembly 5 is used to move the movable frame 2 relative to the fixed frame 1.

[0024] The photovoltaic panel cleaning device 100 of this invention can be automatically started periodically to clean the photovoltaic panel, thereby removing dirt and dust from the surface of the photovoltaic panel and improving the power generation efficiency of the photovoltaic panel.

[0025] When cleaning the photovoltaic panels, water is first sprayed onto the photovoltaic panels using nozzle 32. Then, the drive component 5 drives the moving frame 2 to move and simultaneously drives the cylindrical brush 4 to rotate. The bristles of the cylindrical brush 4 come into contact with the upper surface of the photovoltaic panel. The rotation of the cylindrical brush 4 can clean the upper surface of the photovoltaic panel. Both the cylindrical brush 4 and the nozzle 32 move with the moving frame 2, thereby achieving the cleaning of all photovoltaic panels.

[0026] Optionally, the bristles of the tube brush 4 are made of cotton velvet or polyvinyl alcohol sponge. The cotton velvet or polyvinyl alcohol sponge is relatively soft, which can reduce friction on the surface of the photovoltaic panel and prevent the brush from scratching the surface of the photovoltaic panel.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the fixed frame 1 is long and extends along the length of the mounting frame 202, and the fixed frame 1 is fixedly connected to the mounting frame 202; the movable frame 2 is straddling the upper side of the photovoltaic panel along the width of the mounting frame 202, and the extension directions of the main pipe 31 and the brush 4 are both opposite to the width of the mounting frame 202, and the moving direction of the movable frame 2 is consistent with the width of the mounting frame 202.

[0028] The main pipe 31 extends along the width of the mounting frame 202 and is located on the upper side of the tube brush 4. There are two main pipes 31, which are located on both sides of the movable frame 2 along the length of the mounting frame 202 and are connected to the movable frame 2. When the movable frame 2 moves back and forth along the length of the mounting frame 202, one of the main pipes 31 is located in front of the tube brush 4, so that the photovoltaic panel can be sprayed before brushing, making cleaning more convenient.

[0029] In addition, a standby position for placing the photovoltaic panel cleaning device 100 can be set at one end of the photovoltaic panel along its length. When the photovoltaic panel cleaning device 100 is in the standby position, it can avoid shading the photovoltaic panel.

[0030] In some embodiments, the drive assembly 5 includes a drive member, a drive shaft 52, a first bevel gear 53 and a second bevel gear 54. The drive member is used to drive the drive shaft 52 to rotate. The drive shaft 52 is rotatably connected to the movable frame 2. The first bevel gear 53 is connected to the drive shaft 52, and the second bevel gear 54 is connected to the tube brush 4.

[0031] Optionally, the driving component is a servo motor 51.

[0032] Specifically, such as Figure 2 and Figure 3 As shown, mounting shells 21 are fixedly connected to both sides of the movable frame 2, and the drive assembly 5 is mounted on one side of the mounting shell 21. The mounting shell 21 has a mounting cavity, and the drive shaft 52 is vertically installed in the mounting cavity. The two ends of the drive shaft 52 are rotatably supported on the upper and lower cavity walls of the mounting cavity by bearings. The servo motor 51 is fixed to the upper side wall of the mounting shell 21 by bolts. The output end of the servo motor 51 is connected to the drive shaft 52, and the servo motor 51 can drive the drive shaft 52 to rotate.

[0033] Both ends of the cylindrical brush 4 are provided with cylindrical shafts 41. The two cylindrical shafts 41 are rotatably supported on the two mounting shells 21 by bearings. The cylindrical shafts 41 extend through the side wall of the mounting shell 21 into the mounting cavity. The second bevel gear 54 is fitted on the cylindrical shaft 41 and rotates synchronously with the cylindrical shaft 41. The first bevel gear 53 is fitted on the drive shaft 52 and rotates synchronously with the drive shaft 52.

[0034] The servo motor 51 drives the drive shaft 52 to rotate. Through the meshing of the first bevel gear 53 and the second bevel gear 54, the cylindrical shaft 41 and the cylindrical brush 4 can be rotated, thereby achieving the cleaning of the photovoltaic panel.

[0035] In some embodiments, the drive assembly 5 further includes a moving gear 55 and a rack 56 that mesh with each other, the moving gear 55 being connected to the drive shaft 52 and the rack 56 being connected to the fixed frame 1.

[0036] Specifically, such as Figure 2 and Figure 3 As shown, the movable gear 55 is located on the lower side of the first bevel gear 53. The movable gear 55 is mounted on the drive shaft 52 and rotates synchronously with the drive shaft 52. The rack 56 extends along the length direction of the fixed frame 1 and is fixedly connected to the fixed frame 1. The movable gear 55 meshes with the rack 56.

[0037] Therefore, the servo motor 51 drives the drive shaft 52 to rotate, and through the meshing of the moving gear 55 and the rack 56, the moving frame 2 can be driven to move along the length direction of the fixed frame 1. Controlling the forward and reverse rotation of the servo motor 51 can control the moving direction of the moving frame 2. At the same time, through the meshing of the first bevel gear 53 and the second bevel gear 54, the cylindrical brush 4 can be driven to rotate, thereby realizing the cleaning of the photovoltaic panel.

[0038] In some embodiments, a stop bar 561 is provided on the upper side of the rack 56, and the projection of the stop bar 561 on the horizontal plane can completely cover the projection of the rack 56 on the horizontal plane. The stop bar 561 is connected to the fixing frame 1.

[0039] Specifically, such as Figure 2 and Figure 3 As shown, the baffle 561 is in the shape of a long strip and is arranged on the upper side of the rack 56 along the length direction of the rack 56. The baffle 561 is fixedly connected to the fixing frame 1. The baffle 561 can protect the rack 56, reduce dirt and dust on the rack 56, and ensure its safety.

[0040] In other embodiments, a telescopic protective cover may be provided on the rack 56 to achieve all-round protection for the rack 56.

[0041] In some embodiments, the photovoltaic panel cleaning device 100 further includes a support wheel 61 and a guide rail 62. The guide rail 62 is connected to the fixed frame 1, and the support wheel 61 is connected to the movable frame 2. The support wheel 61 cooperates with the guide rail 62.

[0042] In some embodiments, the number of support wheels 61 is multiple, and at least two support wheels 61 are respectively arranged on both sides of the photovoltaic panel along the extension direction of the brush 4.

[0043] Specifically, such as Figure 2 and Figure 3As shown, there are multiple support wheels 61, which are divided into two groups. The two groups of support wheels 61 are rotatably mounted on the mounting shells 21 on both sides of the movable frame 2. The two groups of support wheels 61 can provide stable support for the movable frame 2. The guide rail 62 is fixedly connected to the fixed frame 1. The guide rail 62 has a guide groove. The lower side of the support wheel 61 is located in the guide groove. The guide groove can restrict the movement direction of the support wheel 61, thereby restricting the movement direction of the movable frame 2.

[0044] In some embodiments, the photovoltaic panel cleaning device 100 further includes a position sensor 7 and a controller. The number of position sensors 7 is multiple. At least one position sensor 7 is located at one end of the guide rail 62 and connected to the fixed frame 1, and at least one position sensor 7 is located at the other end of the guide rail 62 and connected to the fixed frame 1. The position sensor 7 and the driving component are both connected to the controller. The position sensor 7 is used to detect the position of the moving frame 2 and transmit a position signal to the controller. The controller controls the operation of the driving component based on the position signal.

[0045] By setting position sensors 7 at both ends of the guide rail 62, the position sensor 7 can detect the position of the moving frame 2 from the end of the guide rail 62 and transmit the position signal to the controller. The controller controls the servo motor 51 to start, rotate forward, rotate backward or stop based on the received position signal, so as to prevent the moving frame 2 from falling off the guide rail 62 and realize the cleaning work of the photovoltaic panel.

[0046] Specifically, such as Figure 2 and Figure 3 As shown, the position sensor 7 is an inductive proximity switch. The position sensor 7 is fixedly connected to the fixed frame 1 through the bracket 71, and its detection end is arranged facing the mounting shell 21 of the movable frame 2.

[0047] In some embodiments, the cylindrical brush 4 includes a cylindrical body 42, a brush body 43, and a spring 44. The cylindrical body 42 is connected to the movable frame 2. The brush body 43 is slidably connected to the cylindrical body 42. There are multiple brush bodies 43. The cross-section of each brush body 43 is arc-shaped. The multiple brush bodies 43 are arranged circumferentially along the cylindrical body 42. One end of the spring 44 is connected to the cylindrical body 42, and the other end of the spring 44 is connected to the brush body 43. The spring 44 is used to apply a spring force to the brush body 43 in the radial direction of the cylindrical body 42, so that the brush body 43 abuts against the photovoltaic panel.

[0048] Under the elastic force of spring 44, the bristles of brush body 43 can elastically abut against the surface of photovoltaic panel, resulting in better cleaning effect; brush body 43 is slidably connected to cylinder 42. When there is a lot of dirt on the surface of photovoltaic panel, the dirt can push brush body 43 towards cylinder 42 and gradually clean the dirt in the reciprocating movement, preventing brush body 43 from damaging photovoltaic panel.

[0049] In some embodiments, the cylinder 42 has a groove 421, the brush body 43 is connected to a slider, the slider is slidably inserted into the groove 421, and the spring 44 is disposed in the groove 421.

[0050] Specifically, such as Figure 4 As shown, the cylindrical brush 4 includes a cylindrical shaft 41, a cylindrical body 42, and three brush bodies 43. The cylindrical body 42 is fixedly connected to the cylindrical shaft 41, and the three brush bodies 43 are evenly distributed along the circumference of the cylindrical shaft 41. The cross-section of the brush body 43 is arc-shaped, and the outer side of the brush body 43 has bristles. The cylindrical shaft 41 is driven to rotate by the drive component 5, which can achieve the cleaning of the photovoltaic panel.

[0051] Multiple sliding elements are fixedly connected to the inner side of the brush body 43. The multiple sliding elements are evenly distributed along the axial direction of the cylinder 42. The sliding elements are sliding cylinders 431. The cylinder 42 has a sliding groove 421 extending radially therein. The sliding cylinder 431 is inserted into the sliding groove 421 and slides with the sliding groove 421, which can restrict the brush body 43 from sliding radially along the cylinder 42.

[0052] In some embodiments, the spray assembly further includes a water tank 34 and a water pump 33, both of which are connected to the movable frame 2. The inlet of the water pump 33 is connected to the water tank 34, and the outlet of the water pump 33 is connected to the main pipe 31.

[0053] Specifically, such as Figure 1 and Figure 2 As shown, the upper side of the mobile frame 2 is equipped with a water tank 34, a water pump 33 and a battery 8. The water tank 34 and the water pump 33 are fixedly connected to the mobile frame 2 by bolts. The water pump 33 is used to transport the water in the water tank 34 to the two main pipes 31 to realize the spray cleaning of the photovoltaic panels. The battery 8 is used to supply power to the water pump 33, servo motor 51 and other electrical equipment.

[0054] Therefore, by adjusting the operating parameters of the servo motor 51 according to the size of the photovoltaic panel, injecting water into the water tank 34 and charging the battery 8, the photovoltaic panel cleaning device 100 can be put into use, and automatic cleaning of the photovoltaic panel can be achieved.

[0055] In addition, detergent can be added to the water tank 34 to improve the cleaning efficiency of the photovoltaic panels.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A photovoltaic panel cleaning device (100), characterized in that, Suitable for cleaning photovoltaic panels, the photovoltaic panels including a mounting frame (202), the photovoltaic panel cleaning device (100) includes: A fixing frame (1) is connected to the mounting frame (202); A movable frame (2) is movably connected to the fixed frame (1); The spray assembly (3) includes a main pipe (31) and a plurality of nozzles (32) spaced apart along the extension direction of the main pipe (31). The nozzles (32) are arranged toward the photovoltaic panel. The main pipe (31) is connected to the movable frame (2). The extension direction of the main pipe (31) is perpendicular to the movement direction of the movable frame (2) relative to the fixed frame (1). The cleaning assembly includes a cylindrical brush (4) for cleaning photovoltaic panels, the extension direction of the cylindrical brush (4) being consistent with the extension direction of the main pipe (31), and the cylindrical brush (4) being rotatably connected to the movable frame (2). A drive assembly (5) is used to drive the tube brush (4) to rotate relative to the movable frame (2), and / or the drive assembly (5) is used to move the movable frame (2) relative to the fixed frame (1).

2. The photovoltaic panel cleaning device (100) according to claim 1, characterized in that, The drive assembly (5) includes a drive member, a drive shaft (52), a first bevel gear (53) and a second bevel gear (54). The drive member is used to drive the drive shaft (52) to rotate. The drive shaft (52) is rotatably connected to the moving frame (2). The first bevel gear (53) is connected to the drive shaft (52), and the second bevel gear (54) is connected to the tube brush (4).

3. The photovoltaic panel cleaning device (100) according to claim 2, characterized in that, The drive assembly (5) further includes a moving gear (55) and a rack (56) that mesh with each other. The moving gear (55) is connected to the drive shaft (52), and the rack (56) is connected to the fixed frame (1).

4. The photovoltaic panel cleaning device (100) according to claim 3, characterized in that, The rack (56) is provided with a stop bar (561) on its upper side. The projection of the stop bar (561) on the horizontal plane can completely cover the projection of the rack (56) on the horizontal plane. The stop bar (561) is connected to the fixing frame (1).

5. The photovoltaic panel cleaning device (100) according to claim 2, characterized in that, The photovoltaic panel cleaning device (100) also includes a support wheel (61) and a guide rail (62). The guide rail (62) is connected to the fixed frame (1), and the support wheel (61) is connected to the movable frame (2). The support wheel (61) cooperates with the guide rail (62).

6. The photovoltaic panel cleaning device (100) according to claim 5, characterized in that, The number of the support wheels (61) is multiple, and at least two of the support wheels (61) are respectively arranged on both sides of the photovoltaic panel along the extension direction of the brush (4).

7. The photovoltaic panel cleaning device (100) according to claim 5, characterized in that, The photovoltaic panel cleaning device (100) further includes a position sensor (7) and a controller. There are multiple position sensors (7). At least one position sensor (7) is located at one end of the guide rail (62) and connected to the fixed frame (1). At least one position sensor (7) is located at the other end of the guide rail (62) and connected to the fixed frame (1). The position sensor (7) and the drive are both connected to the controller. The position sensor (7) is used to detect the position of the moving frame (2) and transmit a position signal to the controller. The controller controls the operation of the drive based on the position signal.

8. The photovoltaic panel cleaning device (100) according to claim 1, characterized in that, The cylindrical brush (4) includes a cylindrical body (42), a brush body (43), and a spring (44). The cylindrical body (42) is connected to the movable frame (2). The brush body (43) is slidably connected to the cylindrical body (42). There are multiple brush bodies (43). The cross-section of the brush body (43) is arc-shaped. Multiple brush bodies (43) are arranged circumferentially along the cylindrical body (42). One end of the spring (44) is connected to the cylindrical body (42), and the other end of the spring (44) is connected to the brush body (43). The spring (44) is used to apply a radial elastic force to the brush body (43) along the cylindrical body (42) so that the brush body (43) abuts against the photovoltaic panel.

9. The photovoltaic panel cleaning device (100) according to claim 8, characterized in that, The cylinder (42) has a groove (421), the brush body (43) is connected to a sliding member, the sliding member is slidably inserted into the groove (421), and the spring (44) is provided in the groove (421).

10. The photovoltaic panel cleaning device (100) according to any one of claims 1-9, characterized in that, The spray assembly also includes a water tank (34) and a water pump (33), both of which are connected to the mobile frame (2). The inlet of the water pump (33) is connected to the water tank (34), and the outlet of the water pump (33) is connected to the main pipe (31).

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