Automatic cleaning device for photovoltaic module

Abstract

The invention provides an automatic cleaning device for a photovoltaic module, belongs to the technical field of photovoltaic power generation, and is used for solving the technical problem that a traditional manual cleaning mode is difficult to meet the cleaning requirement of a large-scale photovoltaic panel matrix in the prior art. Comprising a rack, a clamping part and a cleaning part; the clamping part comprises fixed clamping blocks which are oppositely arranged in a mutual sliding manner, and the opposite fixed clamping blocks are connected to the rack through a synchronous loosening and closing mechanism and have synchronous loosening and closing amplitudes; the cleaning part comprises sliding clamping blocks which are oppositely and mutually slidably arranged, the sliding clamping blocks and the fixed clamping blocks are connected through a cleaning power mechanism, the sliding clamping blocks and the fixed clamping blocks have synchronous loosening and closing amplitudes, and the sliding clamping blocks further have the sliding amplitude along the photovoltaic panel relative to the fixed clamping blocks; and a cleaning body is arranged between the opposite sliding clamping blocks and is filled with cleaning water. The device has the effects that efficient and automatic cleaning is achieved, and the cleaning efficiency is improved.

Description

Technical Field

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

[0002] In the field of renewable energy, photovoltaic panel matrices, as the core devices for solar power generation, are widely used. Through the orderly arrangement of a large number of photovoltaic panels, they efficiently convert solar energy into electrical energy, providing a sustainable solution for energy supply. Whether in large-scale solar power plants or distributed power generation systems, photovoltaic panel matrices play a crucial role.

[0003] However, photovoltaic panel matrices face many challenges in practical applications. For example, in the scenario of offshore photovoltaic matrices, their surfaces are prone to accumulating salt and bird droppings; in the case of photovoltaic matrices in wilderness environments, a large amount of dust will accumulate. These attachments will significantly reduce the photoelectric conversion efficiency of the photovoltaic panels, affect their power generation performance, thereby reducing energy output and increasing operating costs, and having an adverse impact on the stable operation of the photovoltaic system.

[0004] With the rapid development of the photovoltaic industry, the scale of photovoltaic panel matrices is expanding day by day. The huge area and special layout environment make the cleaning work extremely inconvenient, and the traditional manual cleaning method is difficult to meet the cleaning requirements of large-scale photovoltaic panel matrices. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention proposes an automatic cleaning device for photovoltaic modules to solve the technical problem that the traditional manual cleaning method in the existing technology is difficult to meet the cleaning requirements of large-scale photovoltaic panel matrices.

[0006] The technical solution adopted by the present invention is an automatic cleaning device for photovoltaic modules, which includes a frame, a clamping part, and a cleaning part;

[0007] The clamping part includes fixed clamping blocks that are opposite and slidably arranged relative to each other. The opposite fixed clamping blocks are connected to the frame through a synchronous loosening and tightening mechanism and have a synchronous loosening and tightening amplitude. The loosening and tightening direction of the synchronous loosening and tightening mechanism is along the first direction of the photovoltaic panel;

[0008] The cleaning part includes sliding clamping blocks that are opposite and slidably arranged relative to each other. The sliding clamping blocks are connected to the fixed clamping blocks through a cleaning power mechanism. The sliding clamping blocks and the fixed clamping blocks have a synchronous loosening and tightening amplitude along the first direction, and the sliding clamping blocks also have a sliding amplitude relative to the fixed clamping blocks along the second direction of the photovoltaic panel;

[0009] A cleaning body is arranged between the opposite sliding clamping blocks. The cleaning body is provided with cleaning water by an external water pipe or the frame carries a water tank and a pump to pump cleaning water to the cleaning body.

[0010] Optionally, the synchronous release mechanism includes a rack arranged oppositely and a gear located between the racks and meshing with the racks on both sides at the same time. The racks are respectively arranged on the opposite fixed clamping blocks. The shaft of the gear is rotationally matched with the frame and is driven to rotate by a power source;

[0011] Or, the synchronous release mechanism includes threaded rods with opposite thread directions on both sides. The two sides of the threaded rods are respectively in threaded cooperation with the opposite fixed clamping blocks. The middle of the threaded rods is rotationally matched with the frame and is driven to rotate by a power source.

[0012] Optionally, the cleaning power mechanism includes:

[0013] A guide rod and a driving rod along the second direction, which are respectively located on both sides of the first direction; the guide rod is connected between the fixed clamping block on one side and the sliding clamping block, and is used for guiding the sliding of the sliding clamping block relative to the fixed clamping block; the driving rod is connected between the fixed clamping block on the other side and the sliding clamping block, and is used for driving the sliding clamping block to slide relative to the fixed clamping block;

[0014] The driving rod is a lead screw in threaded cooperation with the sliding clamping block, or the driving rod is a telescopic rod fixedly connected to the sliding clamping block.

[0015] Optionally, cleaning bodies are respectively arranged on the opposite sliding clamping blocks. The cleaning bodies are connected to the sliding clamping blocks through wiping mechanisms, and the cleaning bodies can wipe the photovoltaic panel along the first direction.

[0016] Optionally, the wiping mechanism includes a guiding frame, a cleaning frame and a telescopic power source;

[0017] One end of the guiding frame is fixedly connected to the sliding clamping block, and the other side faces the opposite sliding clamping block; the cleaning frame is slidably connected to the guiding frame; the telescopic power source is fixedly arranged in the guiding frame and is used for controlling the sliding of the cleaning frame along the first direction;

[0018] One end of the cleaning body is fixedly connected to the sliding clamping block, and the other end is fixedly connected to the cleaning frame. The cleaning body has an accommodation cavity inside and is sleeved on the outer periphery of the telescopic power source.

[0019] Optionally, water inlet grooves are arranged on the back of the guiding frame, the cleaning frame and the cleaning body, and the pipeline outlet is arranged at the water inlet groove.

[0020] Optionally, on both sides of the guiding frame along the second direction, toward the clamping part side, the distance between the guiding frame and the photovoltaic panel surface is less than that toward the cleaning part side.

[0021] Optionally, it further includes a waste water recovery unit, and the waste water recovery unit includes:

[0022] First water baffle plates located on both sides of the first direction, the first water baffle plates are fixedly connected to the clamping grooves of the fixed clamping blocks, and when the fixed clamping blocks clamp the photovoltaic panels, the first water baffle plates block the edges of the photovoltaic panels;

[0023] A water blocking part located in the second direction, the water blocking part includes water blocking clamping blocks that are opposite and slidably arranged, the water blocking clamping blocks and the fixed clamping blocks have the same loosening and closing amplitude along the first direction, a water blocking strip is relatively arranged between the opposite water blocking clamping blocks, there is a gap between the water blocking strips, the frame seals the gap, and the waste water is recovered from the gap.

[0024] Optionally, the opposite water blocking clamping blocks are connected by a guide rod, and the guide rod is fixedly connected to the frame.

[0025] Optionally, a connecting platform is arranged on the frame for connecting with a drone.

[0026] From the above technical solutions, the beneficial technical effects of the present invention are as follows:

[0027] Through the coordinated work of the clamping part and the cleaning part, the device realizes the efficient automatic cleaning of the photovoltaic panels, effectively solves the problem that the traditional manual cleaning method is difficult to meet the cleaning requirements of large-scale photovoltaic panel matrices, greatly improves the cleaning efficiency, and reduces the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 It is the overall schematic diagram of the present invention;

[0030] Figure 2 It is the schematic diagram of the present invention without the frame;

[0031] Figure 3 It is the schematic diagram of the cleaning part of the present invention;

[0032] Figure 4 It is the sectional view of the wiping mechanism of the cleaning part of the present invention;

[0033] Figure 5 It is the schematic diagram of the fixed clamping block of the present invention;

[0034] Figure 6 It is the schematic diagram of the position of the waste water recovery unit of the present invention;

[0035] Figure 7 Schematic diagram of the frame water tank and the recycled water circuit of the present invention;

[0036] Figure 8 Schematic diagram of the disassembled state of the frame of the present invention;

[0037] Figure 9 Schematic diagram of the working state of the present invention.

[0038] Wherein: frame 1, water tank 10, connecting table 11, clamping part 2, synchronous loosening and tightening mechanism 20, rack 201, gear 202, fixed clamping block 21, cleaning part 3, sliding clamping block 32, cleaning body 33, accommodation cavity 331, cleaning power mechanism 30, guide rod 301, driving rod 302, wiping mechanism 31, guide frame 311, cleaning frame 312, telescopic power source 313, water inlet groove 34, waste water recovery part 4, first water baffle 40, water baffle clamping block 41, water baffle strip 42, notch 43, guide rod 44, photovoltaic panel 5, first direction 50, second direction 51. Detailed implementation manners

[0039] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0040] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0041] A photovoltaic panel matrix, also known as a photovoltaic array, is a power generation unit composed of multiple photovoltaic panels arranged according to a certain rule and is a core component of a photovoltaic power station. These photovoltaic panels are connected together in series, parallel or in a hybrid connection, converting solar energy into direct current, and then converted into alternating current through an inverter, and finally incorporated into the power grid or used for local loads. The design, installation and operation efficiency of the photovoltaic panel matrix directly affect the power generation and economic benefits of the entire photovoltaic power station.

[0042] The installation angle of the photovoltaic panel, especially its tilt angle (i.e., the angle with the horizontal plane), has a significant impact on the power generation efficiency. Hereinafter, for the convenience of description, the first direction of the photovoltaic panel can be understood as the width direction, and the second direction of the photovoltaic panel can be understood as the length direction. Generally speaking, when installing the photovoltaic panel, the length direction is inclined to the horizontal plane by the local latitude plus a certain angle (usually 10° - 15°) to maximize the reception of solar radiation. However, in actual installation, factors such as seasonal changes, geographical location, and climate conditions need to be comprehensively considered.

[0043] This embodiment provides an automatic cleaning device for photovoltaic modules. For a possible implementation manner, please refer to Figure 1 and Figure 2 :

[0044] It includes a frame 1, a clamping part 2 and a cleaning part 3. The frame 1 can be fixedly installed on a mechanical carrier. The installation spacing between photovoltaic panels needs to be large enough to avoid the front row of photovoltaic panels blocking the rear row. Blocking will cause the rear row of photovoltaic panels to receive less solar radiation, thereby reducing the power generation efficiency. The mechanical carrier can move between the spacings, thereby carrying the automatic cleaning device to move in the criss-cross photovoltaic panel matrix field and clean the photovoltaic panels. The clamping part 2 is used for fixing and positioning. During operation, first, the clamping part 2 positions the photovoltaic panel and fixes it to the photovoltaic panel. Then, with the clamping part 2 as a reference, the cleaning part 3 cleans the surface of the photovoltaic panel;

[0045] Among them, the clamping part 2 includes fixed clamping blocks 21 that are opposite and slidably arranged relative to each other. Please refer to Figure 2 . A clamping body and a connecting rod are arranged on the fixed clamping block 21. A clamping groove for the photovoltaic panel to be inserted into is arranged on the clamping body, and the connecting rod is slidably inserted into the clamping body of another opposite fixed clamping block 21, thereby realizing mutual sliding connection. The opposite fixed clamping blocks 21 are connected to the frame 1 through a synchronous loosening and tightening mechanism 20 and have a synchronous loosening and tightening amplitude. The loosening and tightening direction of the synchronous loosening and tightening mechanism 20 is along the first direction 50 of the photovoltaic panel 5. During operation, when the cleaning device moves to the target photovoltaic panel, the two fixed clamping blocks 21 of the clamping part 2 first open wider than the width of the photovoltaic panel under the action of the synchronous loosening and tightening mechanism 20, then move to both sides of the photovoltaic panel 5, and then synchronously close towards the middle under the action of the synchronous loosening and tightening mechanism 20 until the clamping groove of the fixed clamping block 21 is clamped with the edge of the photovoltaic panel, forming clamping fixation on both sides. In order to increase the error tolerance, inclined angles or rounded corners for guiding can be arranged on both sides of the fixed clamping block 21 of the clamping part 2.

[0046] Among them, the cleaning part 3 includes sliding clamping blocks 32 that are opposite and slidably arranged relative to each other. The sliding clamping blocks 32 are connected to the fixed clamping blocks 21 through a cleaning power mechanism 30. The sliding clamping blocks 32 and the fixed clamping blocks 21 have a synchronous loosening and tightening amplitude along the first direction 50. During the process of the clamping part 2 clamping and forming a fixed connection with the photovoltaic panel, the cleaning part 3 also follows to complete the positioning and connection relationship with the photovoltaic panel. The sliding clamping blocks 32 also have a sliding amplitude relative to the fixed clamping blocks 21 along the second direction 51 of the photovoltaic panel 5, so as to perform cleaning work on the surface of the photovoltaic panel. In order to perform the cleaning work, a cleaning body 33 is arranged between the opposite sliding clamping blocks 32. The frame 1 is provided with a water tank 10 and a pump. The cleaning water in the water tank 10 is pumped to the cleaning body 33 by the pump through a pipeline; alternatively, the cleaning body 33 is supplied with water through a water pipe from an external water source carried by the mechanical carrier.

[0047] The problem to be solved by the above embodiments is how to clean a large-scale photovoltaic panel matrix in the face of the problem of reduced power generation due to dust accumulation on the photovoltaic panels.

[0048] To solve the above problems, the working steps of the above embodiments mainly include:

[0049] Positioning step: First, the mechanical carrier carries the automatic cleaning device above the target photovoltaic panel to be cleaned, and then the clamping part 2 of the device clamps and fixes the photovoltaic panel, so that the device forms a fixed connection relationship with the photovoltaic panel. Specifically, the relative distance between two opposite fixed clamping blocks 21 is controlled by the synchronous loosening and tightening mechanism 20. It should be noted that the installation of the photovoltaic panel is generally fixed and inclined. To facilitate the positioning of the fixed clamping block 21 and the photovoltaic panel, the frame of the device can also be in an inclined state, and the inclination angle is the same as that of the photovoltaic panel. More precisely, when the frame of the device is installed on the carrier, it is installed obliquely, and the angle is the same as that of the photovoltaic panel. Taking an unmanned aerial vehicle (UAV) carrier as an example, please refer to Figure 9 There is a connecting platform 11 provided on the frame 1 for connecting with the UAV.

[0050] After the positioning step is completed, the fixed clamping block 21 of the clamping part 2 and the sliding clamping block 32 of the cleaning part 3 are in response to the completion of the positioning of the photovoltaic panel. Specifically, the fixed clamping block 21 is fixedly connected to the photovoltaic panel; while the sliding clamping block 32 is in a sliding state with respect to the photovoltaic panel. This can be achieved by making the clamping groove of the sliding clamping block 32 slightly larger than that of the fixed clamping block 21. Since the clamping states of the sliding clamping block 32 and the fixed clamping block 21 are synchronous, if the clamping groove of the sliding clamping block 32 is slightly larger than that of the fixed clamping block 21, then when the fixed clamping block 21 clamps the photovoltaic panel, there will be a certain gap between the sliding clamping block 32 and the photovoltaic panel.

[0051] Cleaning step: The cleaning action is driven by the cleaning power mechanism 30, and specifically is completed by the cleaning body 33 arranged between the opposite sliding clamping blocks 32. Specifically, the cleaning power mechanism 30 drives the cleaning body 33 to reciprocate along the second direction 51 of the photovoltaic panel. During the movement, the cleaning body 33 wipes the surface of the photovoltaic panel back and forth. At the same time, an external water source or a self - contained water tank pumps water to the cleaning body 33 through a water pipe. The cleaning body 33 can use materials such as sponges, which have good water absorption and wiping effects. The cleaning body 33 also needs to have a certain elasticity and is fixed at both ends to the sliding clamping blocks 32 on both sides, and can automatically adapt to the distance change during the process of the sliding clamping blocks 32 clamping or loosening the photovoltaic panel.

[0052] In the above embodiments, after the local position cleaning is completed, the carrier can carry the automatic cleaning device to move along the inclined surface of the photovoltaic panel (it is necessary to appropriately loosen the synchronous loosening and tightening mechanism 20, but still maintain the limiting state); after the whole photovoltaic panel is cleaned, it can be detached from the current photovoltaic panel and the same operation process can be carried out on the next photovoltaic panel.

[0053] In one scenario of the automatic cleaning device of the above embodiment, for example, in a desert photovoltaic power station, a small inspection vehicle can be used as a carrier. The automatic cleaning device is installed on the inspection vehicle through a robotic arm, and the inspection vehicle carries it to move and clean the photovoltaic panels. In another scenario, for example, in an offshore photovoltaic power station, a drone can be used as a carrier. Refer to Figure 9 (the drone is not shown), the automatic cleaning device is mounted at the lower end of the drone, and the drone carries the cleaning device to change the working position to clean different photovoltaic panels.

[0054] The beneficial effects of the above embodiment are as follows: First, the automatic cleaning device effectively solves the problem of cleaning large-scale photovoltaic panel matrices. By using a mechanical carrier to carry the device to move between the photovoltaic panel matrices and coordinating the work of the clamping part and the cleaning part, efficient cleaning of the photovoltaic panels is achieved, improving the cleaning efficiency and reducing the labor cost. Second, the clamping part realizes the positioning and fixing of the photovoltaic panel through the synchronous loosening and tightening mechanism, and the cleaning part uses the cleaning power mechanism to drive the cleaning body to reciprocate along the surface of the photovoltaic panel. Combined with the water source supply, a comprehensive and thorough cleaning of the surface of the photovoltaic panel is realized, effectively removing dust and dirt, and improving the power generation efficiency of the photovoltaic panel. In addition, the device has strong adaptability and can be carried on different types of carriers such as small inspection vehicles or drones, and is suitable for photovoltaic power stations in various scenarios such as deserts and oceans. Its automated operation mode improves the efficiency of the cleaning operation.

[0055] For this embodiment, please refer to Figure 2 , the synchronous loosening and tightening mechanism 20 includes a rack 201 arranged oppositely and a gear 202 located between the racks 201 and meshing with the two racks 201 on both sides at the same time. The racks 201 are respectively arranged on the connecting rods of the opposite fixed clamping blocks 21, and the connecting rods also penetrate into the clamping bodies of the opposite fixed clamping blocks 21. The shaft of the gear 202 is rotationally matched with the frame 1 and is driven to rotate by a power source (not shown in the figure). In the above embodiment, when the power source drives the gear 202 to rotate, the gear 202 will drive the two racks 201 to move in the opposite direction or relatively, thereby realizing the loosening or clamping action of the fixed clamping block 21. It has the characteristics of reliable action and automatic centering during clamping. Specifically, through the meshing transmission of the gear 202 and the rack 201, the loosening and clamping actions of the fixed clamping block 21 are more stable and accurate, reducing operation errors caused by mechanical failures and improving the overall reliability of the device. During the process of clamping the photovoltaic panel, the design of the synchronous loosening and tightening mechanism 20 enables the fixed clamping block 21 to automatically adjust its position. During the clamping process, the action amounts of the two fixed clamping blocks 21 on both sides are the same, ensuring that after clamping and fixing, the photovoltaic panel is accurately clamped at the central position, avoiding the influence on the cleaning effect due to the deviation of the clamping position, and improving the quality and efficiency of the cleaning work.

[0056] As another embodiment of the above-mentioned synchronous loosening and clamping mechanism 20, in this embodiment, the synchronous loosening and clamping mechanism 20 includes threaded rods with opposite thread directions on both sides. The two sides of the threaded rod are respectively in threaded cooperation with the opposite fixed clamping blocks 21. The middle part of the threaded rod is rotationally matched with the frame 1 and is driven to rotate by a power source. During the rotation of the threaded rod, due to the opposite thread directions on both sides, the fixed clamping blocks 21 on both sides will also move relatively or in opposite directions, and also have the characteristic of consistent movement amount, so as to ensure that the photovoltaic panel is accurately clamped at the central position during the clamping process.

[0057] Please refer to this embodiment Figure 2 , the cleaning power mechanism 30 includes: a guide rod 301 and a driving rod 302 along the second direction 51, which are respectively located on both sides of the first direction 50; the guide rod 301 is connected between the fixed clamping block 21 and the sliding clamping block 32 on one side, and is used for guiding the sliding of the sliding clamping block 32 relative to the fixed clamping block 21, and at the same time ensuring that the sliding clamping block 32 on the same side follows the fixed clamping block 21 to open or clamp the photovoltaic panel. The guide rod 301 is fixed to the fixed clamping block 21 and slides with the sliding clamping block 32; the driving rod 302 is connected between the fixed clamping block 21 and the sliding clamping block 32 on the other side, and is used for driving the sliding clamping block 32 to slide relative to the fixed clamping block 21, and at the same time ensuring that the sliding clamping block 32 on this side follows the fixed clamping block 21 to open or clamp the photovoltaic panel. In order to improve the stability, the cooperation between the two sliding clamping blocks 32 can also refer to the cooperation between the two fixed clamping blocks 21. Specifically, that is, a connecting rod is provided on the sliding clamping block 32 and slides through the other sliding clamping block 32 opposite thereto;

[0058] On the premise that the guiding is realized by the guide rod 301 on one side, in one possible embodiment, as Figure 2 shown, the driving rod 302 is a lead screw in threaded cooperation with the sliding clamping block 32. The driving rod 302 is rotationally matched with the fixed clamping block 21 and in threaded cooperation with the sliding clamping block 32. By rotating the lead screw, the sliding clamping block 32 is driven to move along the axial direction of the lead screw, so as to realize the movement of the cleaning body 33 along the inclined plane of the photovoltaic panel, thereby realizing the cleaning of the inclined plane of the photovoltaic panel by the cleaning body 33.

[0059] On the premise that the guiding is realized by the guide rod 301 on one side, in another embodiment, the driving rod 302 is a telescopic rod fixedly connected to the sliding clamping block 32, such as an electric telescopic rod or a pneumatic telescopic cylinder. By telescoping, the cleaning body 33 is moved along the inclined plane of the photovoltaic panel, thereby realizing the cleaning of the inclined plane of the photovoltaic panel by the cleaning body 33.

[0060] Please combine this embodiment with Figures 2 to 4, a cleaning body 33 is provided on each of the opposite sliding clamping blocks 32. The cleaning body 33 is connected to the sliding clamping block 32 through a wiping mechanism 31, and the cleaning body 33 can wipe the photovoltaic panel 5 along the first direction 50. The first direction 50 is the width direction of the photovoltaic panel. In the previous embodiment, the cleaning body 33 was cleaned along the second direction, that is, the length direction of the photovoltaic panel. In this embodiment, the cleaning body 33 can be cleaned and wiped along a direction perpendicular to the previous one. This embodiment combines Figures 2 to 4 , so that the cleaning body 33 is connected to the sliding clamping block 32 through the wiping mechanism 31 and can wipe along the width direction (the first direction 50) of the photovoltaic panel. This design brings significant beneficial effects. On the one hand, compared with only cleaning along the length direction (the second direction) of the photovoltaic panel before, there are more wiping directions now, and the surface of the photovoltaic panel can be wiped and cleaned from different directions, effectively improving the overall cleaning effect and ensuring that all areas of the photovoltaic panel can be fully cleaned. On the other hand, when there are local serious stains on the surface of the photovoltaic panel, such as stubborn stains like bird droppings, it can be wiped intensively along the width direction to strongly remove the stains, restore the high-efficiency power generation performance of the photovoltaic panel, and ensure the stable operation of the photovoltaic system.

[0061] This embodiment provides a possible implementation manner of the wiping mechanism 31, in combination with Figure 2 and Figure 4, the wiping mechanism 31 includes a guiding frame 311, a cleaning frame 312, and a telescopic power source 313; one end of the guiding frame 311 is fixedly connected to the sliding clamp block 32, and the other side faces the opposite sliding clamp block 32; the cleaning frame 312 is slidably connected to the guiding frame 311; the telescopic power source 313 is fixedly arranged inside the guiding frame 311 and is used to control the sliding of the cleaning frame 312 along the first direction 50; one end of the cleaning body 33 is fixedly connected to the sliding clamp block 32, and the other end is fixedly connected to the cleaning frame 312, and can be fixedly connected to the outermost end of the cleaning frame 312. There is an accommodation cavity 331 inside the cleaning body 33, which is sleeved on the outer periphery of the telescopic power source 313. Water inlet grooves 34 are arranged on the backs of the guiding frame 311, the cleaning frame 312, and the cleaning body 33, and the pipeline outlet is arranged at the water inlet grooves 34. After water enters the water inlet grooves 34, it can also enter the accommodation cavity 331, so as to facilitate the cleaning body 33 to absorb water fully and quickly. The inner core of the cleaning body 33 can use sponge-like materials, and the outer layer is wrapped with wiping fabrics with telescopic ability, and the whole is annular. The cleaning body 33 can be driven to move along the length direction and the width direction of the photovoltaic panel, so as to wipe the surface of the photovoltaic panel. The structure of this embodiment has remarkable beneficial effects: First, multi-directional wiping enhances the cleaning effect. The cleaning body 33 can wipe along the length and width directions of the photovoltaic panel, can comprehensively cover the surface of the photovoltaic panel from different angles, effectively remove stubborn stains, significantly improve the overall cleanliness, and ensure the efficient power generation of the photovoltaic panel. Second, the self-cleaning function improves the cleaning efficiency. When the telescopic power source 313 retracts, it will squeeze the cleaning body 33 (compress in the length direction), squeeze out the sewage inside it, and the sewage flows away along the inclined plane of the photovoltaic panel. This design avoids sewage residue, realizes the self-cleaning of the cleaning body 33, reduces manual intervention, improves the cleaning efficiency, and ensures the long-term stable operation of the photovoltaic system. It should be noted that when cleaning the photovoltaic panel, it is advisable to start from top to bottom to avoid secondary pollution of sewage.

[0062] In the above embodiment, in order to realize the compression of the cleaning body 33, its two ends need to be fixedly installed respectively, and there is no fixation between the outer side of the middle part and the guiding frame 311 and the cleaning frame 312, and there is no fixation between the inner cavity and the telescopic power source 313.

[0063] In the above embodiment, in order to enhance the sewage discharge effect when compressing the cleaning body 33, on both sides of the guiding frame 311 along the second direction 51, facing the clamping part 2 side, the distance between the guiding frame 311 and the panel of the photovoltaic panel 5 is less than that facing the cleaning part 3 side. The distances on both sides of the guiding frame 311 from the surface of the photovoltaic panel in Figure 8 and 3 can be compared. The smaller distance on one side can effectively limit the cleaning body 33, and the wiping and cleaning effect is good; the larger distance on one side can effectively discharge sewage when compressing the cleaning body 33, and the self-cleaning effect is better.

[0064] This embodiment can refer to Figure 2 、Figures 6 - 8 The device also includes a wastewater recovery unit 4, which includes: a first water baffle 40 located on both sides of the first direction 50, the first water baffle 40 is fixedly connected to the clamping groove of the fixed clamping block 21, which can be referred to Figure 5 When the fixed clamp block 21 clamps the photovoltaic panel 5, the first water baffle 40 blocks the edge of the photovoltaic panel 5 to prevent the washing water from flowing out from the side of the photovoltaic panel; after the first water baffle 40 is set at the clamping groove of the fixed clamp block 21, the structure of the sliding clamp block 32 needs to be adaptively adjusted so that it can also slide with the first water baffle 40, such as Figure 3 and 4 As shown;

[0065] The water retaining part is located in the second direction 51, and the water retaining part includes a water retaining clamp 41 that is relatively and slidably arranged with each other. The water retaining clamp 41 and the fixed clamp 21 have a synchronous loosening amplitude along the first direction 50. The relative water retaining clamps 41 are relatively arranged with water retaining bars 42, and there is a gap 43 between the water retaining bars 42. The frame 1 blocks the gap 43, and the waste water is recovered from the gap 43 and sucked by a water pump. The inside of the water retaining bar 42 is a hard rod, and the outer layer is rubber or other elastic and waterproof materials. The water retaining clamp 41 of the water retaining part can refer to the structure of the sliding clamp 32, and the water retaining bar 42 can refer to the installation method of the guide frame 311. The gap 43 between the two water retaining bars 42 corresponds to the water pumping port of the body. In order to increase the structural stability, the relative water retaining clamps 41 can be connected by a guide rod 44, and the guide rod 44 is fixedly connected to the frame 1, and the two water retaining clamps 41 are slidably connected to the guide rod 44.

[0066] The working principle of the above embodiment is that during the cleaning process, the water pipe will transport cleaning water to the cleaning body 33. During the back and forth cleaning and wiping process of the cleaning body 33, especially during the self-cleaning process of the cleaning body 33 being greatly compressed, the waste water will flow down along the surface of the photovoltaic panel and be blocked and collected by the water retaining bar 42 and the body 1. Its beneficial effect is that when cleaning the photovoltaic panel, the first water retaining plate 40 blocks the edge of the photovoltaic panel to prevent the cleaning water from flowing out from the side; the water retaining clamp 41 of the water retaining part cooperates with the water retaining bar 42, and when the frame 1 blocks the gap 43, it can effectively block and collect the waste water flowing down along the surface of the photovoltaic panel. The biggest advantage of this design is that it realizes the recycling of cleaning water. For example, in scenes such as offshore photovoltaic fields, the cleaning device is carried by a drone, and the amount of water carried is limited and it is impossible to get water on the spot. However, the dust on the photovoltaic panel is not serious, and the cleaning water can be recycled a few times. In this way, the number of cleanings per operation is greatly increased, the efficiency of water resource utilization is improved, and the operating cost is reduced.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. An automatic cleaning device for photovoltaic modules, characterized in that: It comprises a frame (1), a clamping part (2) and a cleaning part (3); The clamping portion (2) comprises fixed clamping blocks (21) arranged relative to each other and slidably disposed with respect to each other, the fixed clamping blocks (21) relative to each other are connected to the frame (1) via a synchronous loosening mechanism (20) and have a synchronous loosening amplitude, and the loosening direction of the synchronous loosening mechanism (20) is along a first direction (50) of the photovoltaic panel (5); The cleaning portion (3) comprises a sliding clamp block (32) arranged to slide relative to each other, the sliding clamp block (32) and the fixed clamp block (21) are connected via a cleaning power mechanism (30), the sliding clamp block (32) and the fixed clamp block (21) have a synchronous loosening amplitude along the first direction (50), and the sliding clamp block (32) also has a sliding amplitude relative to the fixed clamp block (21) along the second direction (51) of the photovoltaic panel (5); A cleaning body (33) is arranged between the opposing sliding clamps (32), and the cleaning body (33) is provided with cleaning water by an external water pipe or by the frame (1) carrying a water tank (10) and a pump to pump cleaning water to the cleaning body (33).

2. The automatic cleaning device for photovoltaic modules according to claim 1, characterized in that: The synchronous loosening mechanism (20) comprises racks (201) arranged opposite to each other and a gear (202) located between the racks (201) and meshing with the racks (201) on both sides at the same time, the racks (201) are respectively arranged on the opposite fixed clamping blocks (21), the shaft of the gear (202) is rotatably matched with the frame (1), and is driven to rotate by a power source; Alternatively, the synchronous loosening mechanism (20) comprises a threaded rod with threads on both sides having opposite rotation directions, the two sides of the threaded rod are respectively threadedly engaged with the opposite fixed clamping blocks (21), the middle part of the threaded rod is rotationally engaged with the frame (1), and is driven to rotate by a power source.

3. The automatic cleaning device for photovoltaic modules according to claim 1, characterized in that: The cleaning power mechanism (30) comprises: The guide rod (301) and the driving rod (302) along the second direction (51) are respectively located on both sides of the first direction (50); the guide rod (301) is connected between the fixed clamp block (21) and the sliding clamp block (32) on one side, and is used to guide the sliding clamp block (32) to slide relative to the fixed clamp block (21); the driving rod (302) is connected between the fixed clamp block (21) and the sliding clamp block (32) on the other side, and is used to drive the sliding clamp block (32) to slide relative to the fixed clamp block (21); The driving rod (302) is a screw rod threadably matched with the sliding clamp block (32), or the driving rod (302) is a telescopic rod fixedly connected to the sliding clamp block (32).

4. The automatic cleaning device for photovoltaic modules according to claim 1, characterized in that: A cleaning body (33) is provided on each of the opposite sliding clamps (32); the cleaning body (33) is connected to the sliding clamp (32) via a wiping mechanism (31); and the cleaning body (33) can wipe the photovoltaic panel (5) along the first direction (50).

5. The automatic cleaning device for photovoltaic modules according to claim 4, characterized in that: The wiping mechanism (31) comprises a guide frame (311), a cleaning frame (312) and a telescopic power source (313); One end of the guide frame (311) is fixedly connected to the sliding clamp (32), and the other end faces the sliding clamp (32) opposite thereto; the cleaning frame (312) is slidably connected to the guide frame (311); the telescopic power source (313) is fixedly arranged in the guide frame (311) and is used to control the sliding of the cleaning frame (312) along the first direction (50); One end of the cleaning body (33) is fixedly connected to the sliding clamp (32), and the other end is fixedly connected to the cleaning frame (312). The cleaning body (33) has an accommodating cavity (331) inside, which is sleeved on the outer periphery of the telescopic power source (313).

6. An automatic cleaning device for photovoltaic modules as claimed in claim 5, characterized in that: A water inlet groove (34) is arranged at the back of the guide frame (311), the cleaning frame (312) and the cleaning body (33), and the pipeline outlet is arranged at the water inlet groove (34).

7. The automatic cleaning device for photovoltaic modules according to claim 5, characterized in that: The guide frame (311) is located along both sides of the second direction (51), toward the clamping portion (2), and the distance between the guide frame (311) and the photovoltaic panel (5) is smaller than the distance toward the cleaning portion (3).

8. The automatic cleaning device for photovoltaic modules according to claim 1, characterized in that: The invention also comprises a waste water recovery unit (4), wherein the waste water recovery unit (4) comprises: First water baffles (40) located on both sides of the first direction (50), the first water baffles (40) being fixedly connected to the clamping groove of the fixed clamping block (21), and when the fixed clamping block (21) clamps the photovoltaic panel (5), the first water baffles (40) blocks the edge of the photovoltaic panel (5); A water retaining portion located in the second direction (51), the water retaining portion comprising water retaining clamps (41) arranged relative to and slidably with each other, the water retaining clamps (41) and the fixed clamps (21) having a synchronous loosening range along the first direction (50), water retaining strips (42) being arranged relative to each other between the relative water retaining clamps (41), gaps (43) being provided between the water retaining strips (42), the frame (1) blocking the gaps (43), and recovering waste water from the gaps (43).

9. An automatic cleaning device for photovoltaic modules according to claim 8, characterized in that: The opposite water retaining clamping blocks (41) are connected via guide rods (44), and the guide rods (44) are fixedly connected to the frame (1).

10. The automatic cleaning device for photovoltaic modules according to claim 1, characterized in that: The frame (1) is provided with a connecting platform (11) for connecting to a drone.

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