Photovoltaic cleaning device

Abstract

The utility model provides a photovoltaic cleaning device which comprises a mounting frame suitable for being arranged on a photovoltaic module. The scraping and brushing mechanism is arranged on the mounting frame, the scraping and brushing mechanism comprises a scraping and brushing plate, the scraping and brushing plate abuts against the light receiving surface of the photovoltaic module, and the scraping and brushing plate is suitable for moving on the light receiving surface in the first direction and the second direction so as to perform dry-type cleaning on the light receiving surface when moving in the first direction; when moving in the second direction, the cleaning device performs wet cleaning on the light receiving surface; and the flushing mechanism is arranged on the mounting frame and is suitable for spraying cleaning liquid to the light receiving surface when the scraping and brushing plate moves in the second direction. According to the photovoltaic cleaning device, the light receiving surface of the photovoltaic module is cleaned in a cleaning mode combining dry cleaning and wet cleaning, the cleaning effect on the photovoltaic module can be improved, and the situation that foreign matter affects the light absorption efficiency of the photovoltaic module is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of photovoltaic panels, and particularly relates to a photovoltaic cleaning device. BACKGROUND

[0002] Solar panels are one of the most important devices in solar technology, and solar panels are devices that convert solar radiation energy into electrical energy through photovoltaic or photochemical effects.

[0003] During long-term use, solar panels are exposed to the outdoor environment, and the surface is prone to accumulate dust, bird droppings, and other pollutants, which can significantly reduce the power generation efficiency of photovoltaic panels.

[0004] In related technologies, self-cleaning technology is used to clean solar panels. Self-cleaning technology is mainly achieved by coating self-cleaning materials. Self-cleaning materials usually contain hydrophilic components and can produce a photocatalytic effect under light, adsorb moisture and oxygen in the air, and thus produce a redox reaction to decompose and wash away dirt.

[0005] For the above related technologies, the inventors have found that when self-cleaning materials are applied to clean solar panels, water marks and stains may adhere to the solar panels, and the self-cleaning materials have poor cleaning effect on dust attached to the solar panels. CONTENT OF THE INVENTION

[0006] One of the technical problems solved by the present disclosure is that the self-cleaning material has poor cleaning effect on solar panels.

[0007] To solve the above technical problems, the present disclosure provides a photovoltaic cleaning device, which includes a mounting frame adapted to be arranged on a photovoltaic module.

[0008] A scraping brush mechanism is arranged on the mounting frame. The scraping brush mechanism includes a scraping brush plate that abuts against a light-receiving surface of the photovoltaic module and is adapted to move on the light-receiving surface in a first direction and a second direction to perform dry cleaning on the light-receiving surface when moving in the first direction and perform wet cleaning on the light-receiving surface when moving in the second direction.

[0009] A flushing mechanism is arranged on the mounting frame and is adapted to spray cleaning liquid onto the light-receiving surface when the scraping brush plate moves in the second direction.

[0010] In some embodiments, the first direction is from an upper edge of the photovoltaic module to a lower edge of the photovoltaic module, and the second direction is from the lower edge of the photovoltaic module to the upper edge of the photovoltaic module.

[0011] In some embodiments, the scraping and brushing mechanism further comprises a driving assembly and a transmission assembly, the driving assembly is arranged on the mounting frame, the scraping and brushing plate is connected with the transmission assembly, and the transmission assembly is in transmission connection with the driving assembly to drive the transmission assembly to move the scraping and brushing plate via the driving assembly.

[0012] In some embodiments, the driving assembly comprises a first motor and a second motor, the first motor is arranged on the top side of the mounting frame, a first transmission shaft is in transmission connection with the output shaft of the first motor, and a first bearing seat is further arranged on the top side of the mounting frame, the first transmission shaft is in rotary connection with the first bearing seat;

[0013] The second motor is arranged on the bottom side of the mounting frame, a second transmission shaft is in transmission connection with the output shaft of the second motor, and a second bearing seat is further arranged on the bottom side of the mounting frame, the second transmission shaft is in rotary connection with the second bearing seat, and the transmission assembly is in transmission connection between the first transmission shaft and the second transmission shaft.

[0014] In some embodiments, the transmission assembly comprises a plurality of first transmission wheels, second transmission wheels and a traction rope, the first transmission wheels are arranged on the first transmission shaft, the second transmission wheels are arranged on the second transmission shaft, one first transmission wheel and one second transmission wheel form a transmission wheel set, and the traction rope is in transmission connection with the transmission wheel set.

[0015] In some embodiments, the scraping and brushing plate comprises a base plate, a scraping plate part and a brush part, the scraping plate part and the brush part are arranged on the side of the base plate facing the light-receiving surface, and the scraping plate part and the brush part are in abutment with the light-receiving surface;

[0016] The scraping plate part is arranged on the side close to one side of the light-receiving surface, and the brush part is arranged on the side close to one side of the light-receiving surface.

[0017] In some embodiments, when the scraping and brushing plate moves in the first direction, the rotation speed of the first motor is lower than that of the second motor;

[0018] When the scraping and brushing plate moves in the second direction, the rotation speed of the first motor is higher than that of the second motor.

[0019] In some embodiments, the flushing mechanism comprises a spraying pipe and a liquid inlet pipe, the spraying pipe is arranged on the top side of the mounting frame, the liquid outlet of the spraying pipe faces the light-receiving surface, one end of the liquid inlet pipe is connected with the spraying pipe, and the other end is connected with the cleaning liquid supply device.

[0020] In some embodiments, a liquid return platform is further arranged at the lower edge of the photovoltaic module.

[0021] In some embodiments, the cleaning liquid supply device comprises a liquid storage tank and a water pump, the liquid return platform is in communication with the liquid storage tank, the distance between the water pump and the bottom wall of the liquid storage tank is greater than or equal to a preset distance, and the liquid inlet pipe is connected with the liquid outlet of the water pump.

[0022] By the technical solution, the photovoltaic cleaning device provided by the present disclosure is arranged on the photovoltaic module through the mounting frame, is convenient to disassemble and assemble, and the squeegee mechanism performs dry cleaning on the light-receiving surface of the photovoltaic module when moving in the first direction, and removes foreign matters on the light-receiving surface. When the squeegee mechanism moves in the second direction, the light-receiving surface of the photovoltaic module is cleaned in a wet manner, and the flushing mechanism sprays cleaning liquid to the light-receiving surface, so that liquid foreign matters can be cleaned, and dust can also be removed, which helps to improve the cleaning effect of the photovoltaic module, and further ensures the light absorption efficiency of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is a structural schematic diagram of the photovoltaic cleaning device disclosed by the embodiments of the present disclosure;

[0025] Figure 2 is a three-dimensional structural schematic diagram of the photovoltaic cleaning device disclosed by the embodiments of the present disclosure;

[0026] Figure 3 is a front structural schematic diagram of the photovoltaic cleaning device disclosed by the embodiments of the present disclosure;

[0027] Figure 4 is a partial structural schematic diagram of the squeegee plate disclosed by the embodiments of the present disclosure.

[0028] Explanation of reference signs:

[0029] 1, mounting frame; 2, flushing mechanism; 21, spraying pipe; 22, liquid inlet pipe; 3, squeegee mechanism; 31, driving assembly; 311, first motor; 312, second motor; 32, transmission assembly; 321, first transmission wheel; 322, second transmission wheel; 323, traction rope; 33, squeegee plate; 331, base plate; 332, squeegee part; 333, brush part; 4, liquid return platform; 5, cleaning liquid supply device; 51, liquid storage tank; 52, water pump; 6, first transmission shaft; 7, first bearing seat; 8, second transmission shaft; 9, second bearing seat. DETAILED DESCRIPTION

[0030] The embodiments of the present disclosure will be described in further detail below with reference to the drawings and examples. The following detailed description of the examples and the accompanying drawings are provided for the purpose of illustration only and are not intended to limit the scope of the present disclosure, which can be implemented in many different forms, not limited to the specific examples disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0031] The present disclosure provides these examples in order to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these examples should be interpreted as merely exemplary, and not as a limitation.

[0032] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] In addition, the "first", "second" and similar words used in the present disclosure do not mean any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0034] It should also be noted that, in the description of the present disclosure, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be interpreted broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. When it is described that a specific device is located between a first device and a second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0035] All terms used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formalized sense, unless specifically defined herein.

[0036] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but where appropriate, the techniques, methods, and devices should be considered as part of the specification.

[0037] As shown in Figures 1 to 4 The present disclosure provides a photovoltaic cleaning device, which is composed of a mounting frame 1, a scraping mechanism 3 and a flushing mechanism 2, wherein the mounting frame 1 is mounted on the photovoltaic module, the scraping mechanism 3 and the flushing mechanism 2 are both arranged on the mounting frame 1, and the mounting frame 1 is arranged around the frame of the photovoltaic module. The mounting frame 1 can be detachably mounted on the photovoltaic module by clamping or bolting, etc., which makes the photovoltaic cleaning device easy to disassemble, and facilitates installation and maintenance.

[0038] As shown in Figures 1 to 3 The scraping mechanism 3 includes a driving assembly 31, a transmission assembly 32 and a scraping plate 33, wherein the driving assembly 31 is arranged on the mounting frame 1, the transmission assembly 32 is in transmission connection with the driving assembly 31, and the scraping plate 33 is connected to the transmission assembly 32. The driving assembly 31 can drive the transmission assembly 32 to move the scraping plate 33. Specifically, the direction from the upper edge of the photovoltaic module to the lower edge of the photovoltaic module is defined as the first direction, and the direction from the lower edge of the photovoltaic module to the upper edge of the photovoltaic module is defined as the second direction. When the driving assembly 31 drives the transmission assembly 32 to move the scraping plate 33 in the first direction, the scraping plate 33 performs dry cleaning on the light-receiving surface of the photovoltaic module; when the driving assembly 31 drives the transmission assembly 32 to move the scraping plate 33 in the second direction, the flushing mechanism 2 sprays cleaning liquid towards the light-receiving surface of the photovoltaic module, and the scraping plate 33 performs wet cleaning on the light-receiving surface of the photovoltaic module.

[0039] Therefore, the photovoltaic cleaning device can not only remove foreign matter with weak adhesion on the light-receiving surface by dry cleaning, but also clean liquid stains and foreign matter with strong adhesion on the light-receiving surface of the photovoltaic module by wet cleaning, and remove dust, which helps to improve the cleaning effect of the photovoltaic module and further ensure the light absorption efficiency of the photovoltaic module.

[0040] As shown in Figure 2 and Figure 3As shown, the driving assembly 31 comprises a first motor 311 and a second motor 312, wherein the first motor 311 is arranged on the side edge of the mounting frame 1 close to the upper edge of the photovoltaic assembly, a first transmission shaft 6 is drivingly connected to the output shaft of the first motor 311 through a coupling, the coupling can transmit power, compensate axial error, change rotating speed and torque, and isolate vibration, which is prior art and will not be described here, a first bearing seat 7 is also arranged on the side edge of the mounting frame 1 close to the upper edge of the photovoltaic assembly, and the end of the first transmission shaft 6 away from the first motor 311 is rotatably connected to the first bearing seat 7; the second motor 312 is arranged on the side edge of the mounting frame 1 close to the lower edge of the photovoltaic assembly, a second transmission shaft 8 is drivingly connected to the output shaft of the second motor 312 through a coupling, a second bearing seat 9 is also arranged on the side edge of the mounting frame 1 close to the lower edge of the photovoltaic assembly, and the end of the second transmission shaft 8 away from the second motor 312 is rotatably connected to the second bearing seat 9. The transmission assembly 32 is drivingly connected between the first transmission shaft 6 and the second transmission shaft 8, the first transmission shaft 6 and the second transmission shaft 8 are parallel, and the height difference between the first transmission shaft 6 and the mounting frame 1 is equal to the height difference between the second transmission shaft 8 and the mounting frame 1, which makes the transmission assembly 32 parallel to the light-receiving surface of the photovoltaic assembly, and thus the squeegee plate 33 always abuts on the light-receiving surface of the photovoltaic assembly to clean more effectively when moving in the first direction or the second direction, and the pressure between the squeegee plate 33 and the photovoltaic assembly can be reduced to prevent the photovoltaic assembly from being damaged.

[0041] As shown, Figure 2 The transmission assembly 32 comprises a plurality of first transmission wheels 321, second transmission wheels 322 and traction ropes 323, and the number of the first transmission wheels 321, the second transmission wheels 322 and the traction ropes 323 is all three in an embodiment of the application, wherein the first transmission wheels 321 are equidistantly fixed on the first transmission shaft 6, the first transmission wheels 321 are perpendicular to the first transmission shaft 6, and the centers of the first transmission wheels 321 are on the axis of the first transmission shaft 6; the second transmission wheels 322 are equidistantly arranged on the second transmission shaft 8, the second transmission wheels 322 are perpendicular to the second transmission shaft 8, and the centers of the second transmission wheels 322 are on the axis of the second transmission shaft 8. The first transmission wheels 321 and the second transmission wheels 322 are guide wheels with V-shaped grooves, one first transmission wheel 321 and one second transmission wheel 322 form a transmission wheel set, one traction rope 323 is drivingly connected to each transmission wheel set, the first transmission wheels 321 and the second transmission wheels 322 can drive the traction ropes 323 to rotate through friction, the traction ropes 323 are parallel to the light-receiving surface of the photovoltaic assembly, and the plurality of traction ropes 323 are connected to the squeegee plate 33, and the squeegee plate 33 is perpendicular to the traction ropes 323.

[0042] To ensure the cleaning effect of the wiper plate 33 on the light-receiving surface of the photovoltaic module, when the wiper plate 33 moves in the first direction, the rotation speed of the first motor 311 is lower than that of the second motor 312, for example, the rotation speed of the first motor 311 is 95% to 98% of that of the second motor 312, which makes the traction rope 323 be pulled tight in a tense state by the pulling force applied by the second motor 312 when the driving assembly 31 drives the transmission assembly 32 to drive the wiper plate 33 to move in the first direction, which can not only ensure that the wiper plate 33 keeps in abutting state with the light-receiving surface of the photovoltaic module under the action of the traction rope 323, but also reduce the possibility that the traction rope 323 is pulled off due to too large pulling force; when the wiper plate 33 moves in the second direction, the rotation speed of the first motor 311 is higher than that of the second motor 312, which makes the traction rope 323 be pulled tight in a tense state by the pulling force applied by the first motor 311 when the driving assembly 31 drives the transmission assembly 32 to drive the wiper plate 33 to move in the second direction.

[0043] As shown in Figure 3 the second motor 312 drives the second transmission shaft 8 to drive the second transmission wheel 322 to rotate to drive the traction rope 323 to pull the wiper plate 33 to move in the first direction, i.e. to make the wiper plate 33 move from the direction close to the upper edge of the photovoltaic module to the direction close to the lower edge of the photovoltaic module, so as to make the wiper plate 33 clean the light-receiving surface of the photovoltaic module in a dry way; after the first motor 311 is started, the first motor 311 drives the first transmission shaft 6 to drive the first transmission wheel 321 to rotate to drive the traction rope 323 to pull the wiper plate 33 to move in the second direction, i.e. to make the wiper plate 33 move from the direction close to the lower edge of the photovoltaic module to the direction close to the upper edge of the photovoltaic module, while the flushing mechanism 2 sprays cleaning liquid towards the light-receiving surface of the photovoltaic module, so as to make the wiper plate 33 clean the light-receiving surface of the photovoltaic module in a wet way. The transmission assembly 32 converts the rotary motion of the output shafts of the first motor 311 and the second motor 312 into the linear motion of the wiper plate 33 in the first direction or the second direction, so as to clean the photovoltaic module.

[0044] As shown in Figure 4As shown, the scraping and brushing plate 33 comprises a base plate 331, a brush part 333 and a scraping part 332, the length of the base plate 331 matches the light-receiving surface of the photovoltaic module, and the base plate 331 is connected with a plurality of traction ropes 323, the scraping part 332 and the brush part 333 are both arranged on the side of the base plate 331 facing the light-receiving surface, the scraping part 332 is arranged on the side of the base plate 331 facing the first motor 311, and the brush part 333 is arranged on the side of the base plate 331 facing the second motor 312. When the driving assembly 31 drives the transmission assembly 32 to move the scraping and brushing plate 33 in the first direction, the base plate 331 deflects so that the brush part 333 is more closely attached to the photovoltaic module, thereby brushing and washing the light-receiving surface of the photovoltaic module, i.e. dry cleaning, which can remove dust and other foreign matter; when the driving assembly 31 drives the transmission assembly 32 to move the scraping and brushing plate 33 in the second direction, the base plate 331 deflects so that the scraping part 332 is more closely attached to the photovoltaic module, thereby scraping and washing the light-receiving surface of the photovoltaic module, and the flushing mechanism 2 sprays cleaning liquid towards the light-receiving surface of the photovoltaic module, i.e. wet cleaning, which can clean liquid stains and attached solid foreign matter.

[0045] As shown in the drawings, Figures 1 to 3 As shown, the flushing mechanism 2 comprises a spraying pipe 21 and a liquid inlet pipe 22, wherein the spraying pipe 21 is arranged on the top side of the mounting frame 1, the length of the spraying pipe 21 matches the length of the top side of the mounting frame 1, a plurality of liquid outlets are arranged on the spraying pipe 21, and the liquid outlets of the spraying pipe 21 are all arranged towards the light-receiving surface of the photovoltaic module, one end of the liquid inlet pipe 22 is connected to the spraying pipe 21, and the other end of the liquid inlet pipe 22 is connected with the cleaning liquid supply device 5.

[0046] First, the brush part 333 is used to clean the light-receiving surface in a dry manner, which can remove impurities with weak adhesion on the light-receiving surface, then the flushing mechanism 2 sprays cleaning liquid from top to bottom to soften impurities with strong adhesion on the light-receiving surface, and then the scraping part 332 is used to scrape and remove the impurities to realize wet cleaning, thereby improving the cleaning effect of the photovoltaic module, reducing the impact of foreign matter on the light absorption efficiency of the photovoltaic module, and preventing the cleaning liquid from polluting the brush part 333 and causing the dust attached to the brush part 333 to solidify into blocks, which affects the subsequent use effect.

[0047] The cleaning liquid supply device 5 comprises a liquid storage tank 51 and a water pump 52 installed and communicated with the liquid storage tank 51, and the liquid inlet pipe 22 is communicated with the liquid outlet of the water pump 52 at the end away from the spray pipe 21. When the photovoltaic cleaning device performs wet cleaning on the photovoltaic module, the water pump 52 sucks the cleaning liquid in the liquid storage tank 51 to flow into the spray pipe 21 through the liquid inlet pipe 22, and the spray pipe 21 sprays the cleaning liquid onto the light-receiving surface of the photovoltaic module, which can improve the cleaning effect on the photovoltaic module.

[0048] As shown in Figure 1 To reduce the waste of cleaning liquid resources, a liquid return platform 4 is arranged at the lower edge of the photovoltaic module, the projection of the photovoltaic module on the horizontal plane is located within the range of the liquid return platform 4, and the liquid return platform 4 is communicated with the liquid storage tank 51. When the photovoltaic cleaning device performs wet cleaning on the photovoltaic module, the spray pipe 21 sprays the cleaning liquid onto the light-receiving surface of the photovoltaic module, and then the cleaning liquid can fall into the liquid return platform 4 and flow into the liquid storage tank 51, thereby recycling the cleaning liquid. To reduce the situation that foreign matters enter the liquid storage tank 51 together with the cleaning liquid, and then the cleaning liquid and foreign matters enter the spray pipe 21 and are sprayed onto the photovoltaic module to cause secondary pollution, the distance between the water pump 52 and the bottom wall of the liquid storage tank 51 is greater than or equal to a preset distance. Specifically, the preset distance can be set to one third of the height of the liquid storage tank 51. After the foreign matters enter the liquid storage tank 51, they are deposited at the bottom of the liquid storage tank 51, and the water pump 52 sucks the upper layer of the cleaning liquid in the liquid storage tank 51 for spraying, so as to ensure the cleaning effect.

[0049] In summary, the photovoltaic cleaning device of the present disclosure has the following advantages: after the second motor 312 is started, the second motor 312 drives the second transmission shaft 8 to drive the second transmission wheel 322 to rotate to drive the traction rope 323 to pull the scraper plate 33 to move in the first direction, and the brush part 333 performs dry cleaning on the light-receiving surface, which can remove the impurities with weak adhesion on the light-receiving surface first; after the first motor 311 is started, the first motor 311 drives the first transmission shaft 6 to drive the first transmission wheel 321 to rotate to drive the traction rope 323 to pull the scraper plate 33 to move in the second direction, and at the same time, the flushing mechanism 2 sprays the cleaning liquid toward the light-receiving surface of the photovoltaic module, and the scraper part 332 scrapes off the impurities to realize wet cleaning. The cleaning liquid falls into the liquid return platform 4 and then enters the liquid storage tank 51 for secondary use. By cleaning the light-receiving surface of the photovoltaic module in the cleaning mode of dry cleaning first and then wet cleaning, the cleaning effect on the photovoltaic module can be improved, so as to reduce the situation that foreign matters affect the power generation efficiency of the photovoltaic module.

[0050] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0051] Although some specific embodiments of the present disclosure have been described in detail by way of examples, one skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present disclosure. One skilled in the art should understand that the above embodiments can be modified or equivalent replacements can be made to some technical features without departing from the scope and spirit of the present disclosure. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict.

Claims

1. A photovoltaic cleaning device, characterized in that, The utility model relates to a photovoltaic module cleaning device, comprising: a mounting frame (1) adapted to be arranged on a photovoltaic module; a squeegee mechanism (3) arranged on the mounting frame (1), the squeegee mechanism (3) comprising a squeegee plate (33) abutting against a light-receiving surface of the photovoltaic module, the squeegee plate (33) being adapted to move on the light-receiving surface in a first direction and a second direction to dry-clean the light-receiving surface when moving in the first direction and wet-clean the light-receiving surface when moving in the second direction; a flushing mechanism (2) arranged on the mounting frame (1) and adapted to spray cleaning liquid onto the light-receiving surface when the squeegee plate (33) moves in the second direction.

2. The photovoltaic cleaning device of claim 1, wherein, The first direction is from a top edge of the photovoltaic module to a bottom edge of the photovoltaic module, and the second direction is from the bottom edge of the photovoltaic module to the top edge of the photovoltaic module.

3. The photovoltaic cleaning device of claim 2, wherein, The squeegee mechanism (3) further comprises a driving assembly (31) arranged on the mounting frame (1) and a transmission assembly (32) connected with the squeegee plate (33), the transmission assembly (32) being in transmission connection with the driving assembly (31) to drive the transmission assembly (32) to move the squeegee plate (33) via the driving assembly (31).

4. The photovoltaic cleaning device of claim 3, wherein, The driving assembly (31) comprises a first motor (311) arranged on a top side of the mounting frame (1), a first transmission shaft (6) in transmission connection with an output shaft of the first motor (311), and a first bearing seat (7) also arranged on the top side of the mounting frame (1), the first transmission shaft (6) being rotatably connected to the first bearing seat (7); The second motor (312) is arranged on a bottom side of the mounting frame (1), a second transmission shaft (8) in transmission connection with an output shaft of the second motor (312) is arranged on the bottom side of the mounting frame (1), and a second bearing seat (9) is also arranged on the bottom side of the mounting frame (1), the second transmission shaft (8) being rotatably connected to the second bearing seat (9), the transmission assembly (32) being in transmission connection between the first transmission shaft (6) and the second transmission shaft (8).

5. The photovoltaic cleaning device of claim 4, wherein, The transmission assembly (32) comprises a plurality of first transmission wheels (321), second transmission wheels (322), and a traction rope (323), the first transmission wheels (321) being arranged on the first transmission shaft (6), the second transmission wheels (322) being arranged on the second transmission shaft (8), one first transmission wheel (321) and one second transmission wheel (322) forming a transmission wheel set, and the traction rope (323) being in transmission connection with the transmission wheel set.

6. The photovoltaic cleaning device of claim 5, wherein, The scraping and brushing plate (33) comprises a base plate (331), a scraping plate part (332) and a brushing part (333), the scraping plate part (332) and the brushing part (333) are arranged on the side of the base plate (331) facing the light-receiving surface, and the scraping plate part (332) and the brushing part (333) are in contact with the light-receiving surface; The scraping plate part (332) is arranged on the side close to the upper edge of the light-receiving surface, and the brushing part (333) is arranged on the side close to the lower edge of the light-receiving surface.

7. The photovoltaic cleaning device of claim 6, wherein, When the scraping and brushing plate (33) moves in the first direction, the rotating speed of the first motor (311) is lower than that of the second motor (312); When the scraping and brushing plate (33) moves in the second direction, the rotating speed of the first motor (311) is higher than that of the second motor (312).

8. The photovoltaic cleaning device according to any of claims 2 to 7, characterized in that, The flushing mechanism (2) comprises a spraying pipe (21) and a liquid inlet pipe (22), the spraying pipe (21) is arranged on the top side of the mounting frame (1), the liquid outlet of the spraying pipe (21) faces the light-receiving surface, one end of the liquid inlet pipe (22) is connected with the spraying pipe (21), and the other end is connected with a cleaning liquid supply device (5).

9. The photovoltaic cleaning device of claim 8, wherein, Further comprising a liquid return platform (4), the liquid return platform (4) is arranged at the lower edge of the photovoltaic module.

10. The photovoltaic cleaning device of claim 9, wherein, The cleaning liquid supply device (5) comprises a liquid storage tank (51) and a water pump (52), the liquid return platform (4) is in communication with the liquid storage tank (51), the distance between the water pump (52) and the bottom wall of the liquid storage tank (51) is greater than or equal to a preset distance, and the liquid inlet pipe (22) is connected with the liquid outlet of the water pump (52).

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