JP3214600U - Solar panel cleaning device - Google Patents

Abstract

Provided is a solar panel cleaning device that can be easily installed, moved, and removed from a solar panel and can reliably clean the surface of the solar panel. A frame main body 2 having a traveling wheel 34, a guide wheel 30 and a pair of traveling rails 8 and movable in a direction perpendicular to the surface of the solar panel, and a brush 37 in contact with the surface of the solar panel. A cleaning body 3 that can travel on the traveling rail, a first drive unit 17 that reciprocates the cleaning body along the traveling rail, a second drive unit 39 that rotates the brush forward and backward, and a control unit 18. , 40. The frame main body is locked to only the upper end surface of the solar panel via a guide wheel, and is installed on the surface of the solar panel via a traveling wheel. When the cleaning unit is raised by the first drive unit, the control unit rotates the brush forward by the second drive unit, and when the first drive unit lowers the cleaning unit, the control unit reverses the brush by the second drive unit. . [Selection] Figure 1

Description

  The present invention relates to a solar panel cleaning device for cleaning the surface of a solar panel of a photovoltaic power generation facility.

  Solar panels for solar power generation facilities are installed on fields, mountainous areas, rooftops and roofs of buildings, and are exposed to wind and rain and snow. Conventionally, various apparatuses for cleaning the surface of a solar panel have been proposed.

For example, in Patent Document 1, a carriage having a wiper body is installed on a rail, a rope wound around a pulley is coupled to the carriage, and the pulley is rotated forward and backward by a motor to reverse the solar panel with the wiper body of the carriage. A solar panel cleaning device for wiping the surface is described.
Patent Document 2 describes a solar panel cleaning device in which a gear is provided on a frame, and a mop rotates on the gear.
Since these cleaning devices cannot be moved in the horizontal direction of the solar panel, they are not suitable for cleaning a solar panel that is long in the horizontal direction.

Patent Document 3 proposes a self-propelled cleaning device including a traveling unit having a crawler capable of traveling on the surface of a solar panel and a cleaning unit having a rotating brush and a wiper blade.
Since this cleaning device is self-propelled on the surface of the solar panel without any guide, there is a possibility that the moving path is shifted when overcoming the step on the solar panel. In addition to forward / backward movement, the forward and backward movements are performed obliquely and the direction is changed, so that the control is complicated and expensive, and further, it is difficult to recover when a failure occurs at the center of the solar panel.

Patent Document 4 has a guide rail, has a moving frame installed on the surface of the solar panel so as to be vertically movable with respect to the guide rail, a moving wheel, and a rotating cleaning brush, and moves along the guide rail. A cleaning device comprising a cleaning body is described.
In this cleaning device, the cleaning body moves horizontally with the moving frame by the moving wheel of the cleaning body, and the cleaning body is manually moved up and down, so when the cleaning body is not located in the middle of the moving frame, Since the distance from the cleaning body to the upper end and the lower end of the moving frame is different, the moving frame may tilt when the cleaning body moves in the horizontal direction together with the moving frame, and the movement is not smooth.

Patent Document 5 includes a guide wheel that contacts the upper and lower ends of the solar panel, and a traveling wheel that is installed on the surface of the solar panel. A cleaning device comprising a cleaning body that is drivably driven and travels on a traveling frame of a main body frame, and a winding unit that is connected to the cleaning body at one end and can wind a wire attached to the drum at the other end. Have been described.
When this cleaning device is installed on the solar panel, it is necessary to abut the guide wheel at one end of the main body frame to the upper end of the solar panel and the guide wheel at the other end to contact the lower end of the solar panel. Since it is necessary to connect the main body frames, it takes time to adjust the position of the guide wheels and to connect the main body frames, which is complicated.

Microfilm of Japanese Utility Model Application Sho 62-17653 (Japanese Utility Model Application Publication No. 63-125960) JP 2010-287867 A International Publication No. 2014/208192 Japanese Patent No. 5957093 JP 2017-42893 A

  The present invention has been made in view of such conventional problems, and a solar panel cleaning device that can be easily installed, moved, and removed from the solar panel and can reliably clean the surface of the solar panel. The issue is to provide.

In order to solve the above problems, the present invention provides:
A traveling wheel that rolls on the surface of the solar panel, a guide wheel that rolls on the upper end surface of the solar panel, and a pair of traveling rails parallel to the inclination direction of the surface of the solar panel, the surface of the solar panel is A frame body movable in a direction perpendicular to the tilt direction;
A cleaning body that has a brush that can be rotated forward and backward around a rotation axis that extends in a direction perpendicular to the traveling rail and that contacts the surface of the solar panel, and that can travel on the traveling rail;
A first drive unit for reciprocating the cleaning body along the traveling rail;
A second drive unit for rotating the brush forward and backward,
A control unit for controlling the first driving unit and the second driving unit,
The frame main body is locked only on the upper end surface of the solar panel via the guide wheel, and is installed on the surface of the solar panel via the traveling wheel.
When the control unit raises the cleaning body in the inclination direction of the surface of the solar panel by the first driving unit, the control unit rotates the brush forward by the second driving unit, and the cleaning unit by the first driving unit. Is lowered in the inclination direction of the surface of the solar panel, the brush is reversed by the second driving unit.

  In the present invention, the frame body can be installed on the solar panel body only by locking the frame body only to the upper end surface of the solar panel. Moreover, since the rotation direction of a brush differs when raising and lowering a cleaning body, the stain | pollution | contamination of the surface of a solar panel can be removed reliably.

The controller controls the traveling speed of the cleaning body when the cleaning body is lowered in the inclination direction of the surface of the solar panel by the first driving section, and the cleaning body is moved to the surface of the solar panel by the first driving section. The traveling speed of the cleaning body when it is raised in the tilt direction is made smaller.
Alternatively, the control unit uses the first drive unit to set the number of rotations of the brush by the second drive unit when the cleaning unit is lowered in the inclination direction of the surface of the solar panel by the first drive unit. You may make it make it smaller than the rotation speed of the said brush by the said 2nd drive part when raising a body to the inclination direction of the surface of a solar panel.

A first motor installed at one end of the frame body; and a first motor that transmits power of the first motor to the cleaning body to reciprocate the cleaning body along the traveling rail. A power transmission mechanism.
The first power transmission mechanism includes:
A drive pulley directly connected to the output shaft of the first motor;
A drive shaft extending in a direction perpendicular to the pair of travel rails at one end of the frame body;
A first pulley provided on the drive shaft;
A belt hung between the drive pulley and the first pulley;
A second pulley provided at both ends of the drive shaft;
A third pulley provided at the other end of the frame body;
The frame main body extends along the traveling rail, one end is hooked on the second pulley and connected to one end of the cleaning body, and the other end is hooked on the second pulley and connected to one end of the cleaning body. It consists of a rope.

  The second drive unit includes a second motor installed in the cleaning body, and a second power transmission mechanism that transmits the power of the second motor to the rotation shaft of the brush to rotate the brush.

  According to the present invention, since the frame main body is locked only to the upper end surface of the solar panel and installed on the solar panel main body, installation, movement, and removal from the solar panel can be easily performed. Moreover, since the rotation direction of a brush differs when raising and lowering a cleaning body, the surface of a solar panel can be cleaned reliably.

The top view of the solar panel cleaning apparatus of this invention. The side view of the solar panel cleaning apparatus of FIG. The enlarged view seen from the lower end side of the solar panel cleaning apparatus of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 1. The right view of FIG. The VIII-VIII line expanded sectional view of FIG. The partial expanded sectional view of FIG. The right view of FIG. The expanded sectional view of the brush of the solar panel cleaning apparatus of FIG. The top view of the operation panel of the solar panel cleaning apparatus of FIG. The flowchart which shows the operation | movement flow of the solar panel cleaning apparatus of this invention. The top view which shows the state which installed the solar panel cleaning apparatus of this invention in the solar panel. The enlarged side view which shows the state which installed the solar panel cleaning apparatus of this invention in the solar panel. The side view (a) which shows the rotation direction of the brush at the time of raising of the cleaning body of the solar panel cleaning apparatus of this invention, and the side view (b) which shows the rotation direction of the brush at the time of descent.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 and 2 show a solar panel cleaning device (hereinafter simply referred to as “cleaning device”) 1 according to the present invention. The cleaning device 1 includes a frame main body 2 and a cleaning body 3. In this specification, when the cleaning device 1 is viewed from above, a portion (the right portion in FIGS. 1 and 2) installed above the inclination direction of the solar panel 100 is referred to as “upper side” or “upper end”. The part (the left part in FIGS. 1 and 2) installed below the tilt direction of 100 is referred to as “lower side” or “lower end”.

  The frame main body 2 is a rectangular shape that is long in the inclination direction of the solar panel 100 on which the cleaning device 1 is installed and short in the horizontal direction, and is parallel to the inclination direction of the surface of the solar panel 100, and a pair of side frames. 4 has a lower frame 5 that connects the lower ends of the four frames, and an upper frame 6 that connects the upper ends of the pair of side frames 4.

  As shown in FIG. 9, the surfaces of the pair of side frames 4 are running rails 8 having guide grooves 7 on which the running wheels 34 of the cleaning body 3 run. A plurality of moving wheels 9 that roll on the surface of the solar panel 100 are provided on the back surfaces of the pair of side frames 4, and are movable in a direction perpendicular to the inclination direction of the solar panel 100. As shown in FIG. 9, the pair of side frames 4 has a through hole 10 in the longitudinal direction. As shown in FIGS. 3, 4, and 5, a drive shaft 11 extending in a direction orthogonal to the pair of side frames 4 is installed on the lower ends of the pair of side frames 4 via a bracket 4 a. A first pulley 12 is provided in the middle of the drive shaft 11, and a second pulley 13 is provided at both ends. As shown in FIG. 7, support shafts 14 extending in a direction orthogonal to the pair of side frames 4 are respectively disposed on the upper ends of the pair of side frames 4 via brackets 4b. Each spindle 14 is provided with a third pulley 15. As shown in FIGS. 5 and 9, a rope 16 is inserted into the through holes 10 of the pair of side frames 4, and one end of the rope 16 is hung on the second pulley 13 and connected to the cleaning body 3. Is hooked on the third pulley 15 and connected to the cleaning body 3. The second pulley 13 may be replaced by a leather belt wound around the drive shaft 11 to prevent slippage.

  The lower frame 5 is a plate-like one that is placed and fixed on the lower ends of the pair of side frames 4. As shown in FIGS. 1 and 3, a first motor 17, a first control device 18, and an amplifier 19 are installed on the surface of the lower frame 5. As shown in FIG. 1, a lower limit switch 22 for detecting a lower limit of movement of the cleaning body 3 is provided on the back surface of the lower frame 5.

  The first motor 17 can be rotated forward and backward, and a drive pulley 20 is directly connected to an output shaft thereof. A belt 21 is hung between the drive pulley 20 and the first pulley 12 of the drive shaft 11. The drive pulley 20, the belt 21, the first pulley 12, the drive shaft 11, the second pulley 13, the third pulley 15, and the rope 16 constitute the first power transmission mechanism of the present invention. The 1 motor 17 constitutes a first drive unit of the present invention that reciprocates the cleaning body 3 along the traveling rail 8. By using the rope 16 to move the cleaning body 3 in this way, the cleaning body 3 is less likely to come off the traveling rail 8 than the one using a combination of a rack and a pinion.

  The first control device 18 drives the first motor 17 to control the traveling of the cleaning body 3 and exchanges signals with the second control device 40 described later. The first control device 18 is provided with an operation panel 18a, and a remote controller 18c and an antenna 18b that transmits and receives signals. As shown in FIG. 12, the operation panel 18a includes a start button 23, an up button 24, a down button 25, a stop button 26, an automatic / manual operation changeover switch 27, and a brush operation switch 28 for stopping or operating the brush. Is provided. The buttons and switches on the operation panel 18a are used only during a manual test run. The remote controller 18c is a terminal possessed by the operator, and performs remote ON / OFF operations during automatic driving. The amplifier 19 controls the voltage of the built-in battery or the external power supply and supplies power to the first motor 17, the first control device 18, a second motor 39 and a second control device 40 described later.

  As shown in FIG. 6, the upper frame 6 is provided with two L-shaped brackets 29 protruding toward the surface of the solar panel 100. Each bracket 29 is provided with a guide wheel 30 that rolls on the upper end surface of the solar panel 100 and a transportation wheel 31. As shown in FIGS. 1 and 6, an upper limit switch 32 that detects the upper limit of movement of the cleaning body 3 is provided on the upper surface of the upper frame 6.

  As shown in FIG. 1, the cleaning body 3 has a rectangular base 33 that is long in the horizontal direction. As shown in FIGS. 8, 9, and 10, a plurality of traveling wheels 34 that travel along the guide grooves 7 of the traveling rails 8 of the pair of side frames 4 are disposed at both ends in the horizontal direction on the back surface of the base 33 via brackets 33 a. Is provided. On the back surface of the base 33, a pair of support plates 35 extending toward the surface of the solar panel 100 are provided inside the traveling wheels 33. The pair of support plates 35 are rotatably provided with two rotating shafts 36 extending in a direction perpendicular to the traveling rail 8. Brushes 37 that contact the surface of the solar panel 100 are attached to the two rotary shafts 36. As shown in FIG. 11, the brush 37 is formed by spirally winding a wire 37 b on which a resin brush material 37 a is attached around a rotating shaft 36.

  As shown in FIG. 8, the two rotating shafts 36 are provided with a driven pulley 38 at one end. Two second motors 39 and a second control device 40 are installed on the surface of the base 33. Each of the two second motors 39 can be rotated forward and backward, and a drive pulley 41 is directly connected to an output shaft of one of the second motors 39. Similarly, a drive pulley 41 is directly connected to the output shaft of the other second motor 39. A belt 42 is hung between the driving pulley 41 of the two second motors 39 and the driven pulley 38 of the two rotating shafts 36. The drive pulley 41, the belt 42, and the driven pulley 38 constitute a second power transmission mechanism of the present invention, and the second power transmission mechanism and the second motor 39 rotate the brush 37 forward and backward. Parts. The second control device 40 is configured to control the rotation of the brush 37 by driving the second motor 39 based on a command from the first control device 18. Thus, since the two rotating shafts 36 having the brushes 37 are separately rotated by the two second motors 39, the rotation direction and the number of rotations of the two brushes 37 can be individually controlled.

  As power sources for the first motor 17 and the first control device 18, a battery is provided in the lower frame 5 of the frame body 2 or an external power source is used. As for the power source of the second motor 39 and the second control device 40 of the cleaning body 3, the base 33 of the cleaning body 3 has its own battery, or power supplied to the lower frame 5 of the frame body 2 is supplied via a cable. You may make it do.

  Next, operation | movement of the cleaning apparatus 1 which consists of the above structure is demonstrated with reference to the flowchart of FIG.

  First, two workers lift up both ends of the cleaning device 1 manually, and the cleaning device 1 is installed on the solar panel 100 to be cleaned as shown in FIG. 14, and the upper end of the frame body 2 as shown in FIG. Is locked to the upper end surface of the solar panel 100 via the guide wheel 30. Thereby, the cleaning device 1 can move the surface of the solar panel 100 in the direction perpendicular to the tilt direction by the moving wheel 9 while being guided to the upper end of the solar panel 100 by the guide wheel 30. Thus, since the frame main body 2 is locked only to the upper end surface of the solar panel 100 and installed on the solar panel 100, installation, movement, and removal to the solar panel 100 can be easily performed.

  Prior to the start of cleaning, it is difficult to procure water, especially in mountainous areas, but water sources such as water supply tanks, pumps and hoses are prepared, and water is sprayed on the surface of the solar panel 100 manually, or a nozzle is provided on the cleaning body 3 It is preferable to perform cleaning while automatically sprinkling water. By spraying water in this way, solidified dirt on the surface of the solar panel 100 is softened and becomes easy to clean.

  When the cleaning device 1 is manually moved to one end (left end) of the solar panel 100 as shown in FIG. 14 and the start button 23 of the operation panel 18a is pressed, the first control device is shown in the flowchart of FIG. In step S101, it is determined that the start button 23 has been turned on, and in step S102, it is determined whether the operation switch 27 has been switched to manual or automatic.

  At the start of cleaning, the operation changeover switch 27 is normally switched to manual operation to check and adjust the operation of the cleaning device 1. For example, the brush 37 can be rotated by the brush operation switch 27, and the cleaning body 3 can be raised or lowered by the up button 24 or the down button 25. At the time of this manual operation, the rotational speed of the brush 37 and the traveling speed of the cleaning body 3 can be freely changed. The case where the brush 37 is rotated will be described. When the operation changeover switch 27 is switched to manual in step S102, it is determined in step S103 whether the brush operation switch 28 is operated or stopped. The brush 37 is rotated in the forward direction for a predetermined time, and the rotation of the brush 37 is stopped in step S105. If the stop button 26 is ON in step 106 while the brush 37 is rotating, the rotation of the brush 37 is stopped in step S105. If the brush operation switch 28 is stopped in step S103, the brush 37 is not operated in step S107 and remains stopped.

  If the operation changeover switch 27 is automatic in step S102, the process waits in step S110 until the brush 37 rotates and a predetermined time elapses. During this time, it is determined in step S120 whether the brush operation switch 28 is operating or stopped. If it is stopped, the brush 37 is kept stopped in step S121. If it is operating, the brush 37 is rotated in the normal rotation direction in step S122. The number of rotations of the brush 37 in the forward rotation direction is preferably 1500 to 2000 rotations per minute. When the brush 37 rotates and a predetermined time elapses, the cleaning body 3 is raised in step S111. The traveling speed when the cleaning body 3 is raised is preferably 0.33 m / second, but is not limited thereto. If the upper limit switch 32 is turned on in step S112 and it is determined that the cleaning body 3 has reached the upper end, the cleaning body 3 is stopped from rising, and a predetermined time is waited in step S113. On the other hand, when the upper limit switch 32 is turned on, the rotation of the brush 37 is stopped in step S123.

  When the predetermined waiting time has elapsed, in step 124, the brush 37 is rotated in the reverse direction. The number of rotations of the brush 37 in the reverse direction is the same as that during forward rotation. If the brush 37 rotates, it will wait for predetermined time by step S114. When the predetermined time has elapsed, the cleaning body 3 is lowered in step S115. The traveling speed when the cleaning body 3 is lowered is preferably about 0.23 m / second, which is about 2/3 slower than the traveling speed when the cleaning body 3 is raised, but is not limited thereto. Instead of lowering the traveling speed when the cleaning body 3 is lowered than when it is raised, the rotational speed when the brush 37 is lowered may be lower than the rotational speed when it is raised, and may be about 70%. If it is determined in step S116 that the lower limit switch 22 is turned on and the cleaning body 3 has reached the lower end, the descent of the cleaning body 3 is stopped. On the other hand, when the lower limit switch 22 is turned on, the rotation of the brush 37 is stopped in step S125, and the process ends.

  When the cleaning of the first section of the solar panel 100 is completed, both ends of the cleaning device 3 are pushed manually and moved to the right as shown in FIG. 14 to similarly clean the next section. This can be repeated until the right end of the solar panel 100 is cleaned.

  As described above, when the cleaning device 3 is lifted as shown in FIG. 16 (a), the control devices 18 and 40 cause the brush 37 to rotate forward and as shown in FIG. 16 (b). Since the brush 17 is reversed, the scraping direction of the brush 37 is changed between when it is raised and when it is lowered, so that the dirt on the surface of the solar panel 100 can be reliably removed. In addition, since the traveling speed of the cleaning body 3 is increased when it is raised and slowed when it is lowered, the solar panel 100 is surely cleaned by roughing the dirt at a high speed when it is raised and carefully removing the dirt at a low speed when it is lowered. Can do. Alternatively, the rotational speed in the reverse direction of the brush 37 when the cleaning body 3 is lowered may be smaller than the rotational speed in the forward direction of the brush 37 when the cleaning body 3 is lifted. In this way, by changing the traveling speed of the cleaning body 3 and the rotation speed of the brush 37 between the rising and the lowering, the power consumption at the time of lowering in which dirt is removed is suppressed rather than the power consumption at the time of rising. Thus, power can be saved.

  The cleaning device 1 of the present invention manually moves the solar panel 100 in the horizontal direction, but can also be moved automatically by driving the moving wheel 9 or the guide wheel 30 with a motor. However, since the metal panel for fixing the solar panel 100 is provided on the upper and lower end faces of the solar panel 100, the guide wheel 30 is automatically attached to the solar panel 100 when the guide wheel 30 gets over the metal panel. Although there is a possibility that the wheel will come off from the upper end surface, if it is manual, it is safe because the worker moves it carefully.

  The present invention is not limited to the above embodiment, and can be modified. For example, the number of brushes 37 of the cleaning body 3 is not limited to two, and may be one or three or more. The second motor 39 that drives the brush 37 is provided separately for the two brushes 37, but the two brushes 37 may be driven by one second motor 39.

DESCRIPTION OF SYMBOLS 1 ... Solar panel cleaning apparatus 2 ... Frame main body 3 ... Cleaning body 4 ... Side frame 5 ... Lower frame 6 ... Upper frame 7 ... Guide groove 8 ... Traveling rail 9 ... Moving wheel 10 ... Through-hole 11 ... Moving shaft 12 ... 1st Pulley 13 ... 2nd pulley 14 ... Support shaft 15 ... 3rd pulley 16 ... Rope 17 ... 1st motor 18 ... 1st control device 18a ... Operation panel 18b ... Antenna 18c ... Remote control 19 ... Amplifier 20 ... Drive pulley 21 ... Belt 22 ... Lower limit switch 23 ... Start button 24 ... Up button 25 ... Down button 26 ... Stop button 27 ... Operation switch button 28 ... Brush operation button 29 ... Bracket 30 ... Guide wheel 31 ... Transport wheel 32 ... Upper limit switch 33 ... Base Table 33a ... Bracket 34 ... Traveling wheel 35 ... Support plate 36 ... Rotating shaft 37 ... Bra 37a ... Brush material 37b ... Wire 38 ... Driven pulley 39 ... Second motor 40 ... Second controller 41 ... Drive pulley 42 ... Belt 100 ... Solar panel

Claims (6)

A traveling wheel that rolls on the surface of the solar panel, a guide wheel that rolls on the upper end surface of the solar panel, and a pair of traveling rails parallel to the inclination direction of the surface of the solar panel, the surface of the solar panel is A frame body movable in a direction perpendicular to the tilt direction;
A cleaning body that has a brush that can be rotated forward and backward around a rotation axis that extends in a direction perpendicular to the traveling rail and that contacts the surface of the solar panel, and that can travel on the traveling rail;
A first drive unit for reciprocating the cleaning body along the traveling rail;
A second drive unit for rotating the brush forward and backward,
A control unit for controlling the first driving unit and the second driving unit,
The frame main body is locked only on the upper end surface of the solar panel via the guide wheel, and is installed on the surface of the solar panel via the traveling wheel.
When the control unit raises the cleaning body in the inclination direction of the surface of the solar panel by the first driving unit, the control unit rotates the brush forward by the second driving unit, and the cleaning unit by the first driving unit. When the solar panel is lowered in the inclination direction of the surface of the solar panel, the brush is reversed by the second drive unit.   The controller controls the traveling speed of the cleaning body when the cleaning body is lowered in the inclination direction of the surface of the solar panel by the first driving section, and the cleaning body is moved to the surface of the solar panel by the first driving section. The solar panel cleaning apparatus according to claim 1, wherein the cleaning speed is lower than a traveling speed of the cleaning body when the cleaning body is raised in an inclination direction.   The controller controls the number of rotations of the brush by the second drive unit when the first drive unit lowers the cleaning body in the inclination direction of the surface of the solar panel. 2. The solar panel cleaning apparatus according to claim 1, wherein the number of rotations of the brush by the second driving unit when the solar panel is raised in a tilt direction of the surface of the solar panel is smaller than the number of rotations of the brush. The first driving unit includes:
A first motor installed at one end of the frame body;
A first power transmission mechanism that transmits power of the first motor to the cleaning body and reciprocates the cleaning body along the traveling rail;
The solar panel cleaning device according to any one of claims 1 to 3, wherein The first power transmission mechanism includes:
A drive pulley directly connected to the output shaft of the first motor;
A drive shaft extending in a direction perpendicular to the pair of travel rails at one end of the frame body;
A first pulley provided on the drive shaft;
A belt hung between the drive pulley and the first pulley;
A second pulley provided at both ends of the drive shaft;
A third pulley provided at the other end of the frame body;
The frame main body extends along the traveling rail, one end is hooked on the second pulley and connected to one end of the cleaning body, and the other end is hooked on the second pulley and connected to one end of the cleaning body. The solar panel cleaning apparatus according to claim 4, comprising a rope. The second driving unit includes:
A second motor installed in the cleaning body;
A second power transmission mechanism for transmitting the power of the second motor to the rotating shaft of the brush and rotating the brush;
The solar panel cleaning device according to claim 1, wherein

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