Multifunctional Drone for Cleaning Photovoltaic Panels and Method for Cleaning the Edges of Photovoltaic Panels

Abstract

The present invention belongs to the technical field of aircraft, and particularly relates to a multi-functional photovoltaic panel cleaning unmanned aerial vehicle and a cleaning method thereof; the present invention provides a multi-functional photovoltaic panel cleaning unmanned aerial vehicle, comprising: an aircraft body; an extension frame, a plurality of the extension frames are arranged circumferentially around the aircraft body; a spraying device, which is arranged at the lower end of the extension frame; a protection device, which is sleeved on the outer wall of the spraying device in a lifting manner and is adapted to limit the direction of the liquid sprayed by the spraying device; wherein, when the turntable of the spraying device rotates to spray the liquid around, the protection device moves downward to surround the outside of the turntable to limit the coverage range of the liquid sprayed by the turntable; through the setting of the protection device, it is possible to avoid the liquid sprayed from splashing outside the photovoltaic panel when the spraying device moves to the edge position of the photovoltaic panel.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft, and particularly relates to a multi-functional unmanned aerial vehicle for cleaning photovoltaic panels and a method for cleaning the edges of photovoltaic panels. Background Art

[0002] With the wide application of photovoltaic power generation, the workload of regularly cleaning the surface of photovoltaic power generation panels has increased significantly, because the power generation efficiency is closely related to the cleanliness of the photovoltaic panel surface, and among the existing cleaning methods on the market, manual cleaning is still mainly used for small-scale cleaning; in large-scale photovoltaic power stations, a large number of cleaning devices are used, and the equipment cost is high. An outer frame is required as the guide rail for the cleaning device, which not only has a high cost but also easily causes overheating at the edges, resulting in the failure of the photovoltaic panel.

[0003] In order to reduce costs, unmanned aerial vehicles are mostly used to spray self-cleaning liquid to form a self-cleaning coating on the surface of the photovoltaic panel. However, since the self-cleaning liquid has certain corrosive properties, when the unmanned aerial vehicle sprays the surface of the photovoltaic panel, it is necessary to prevent the self-cleaning liquid sprayed from the nozzle of the unmanned aerial vehicle from splashing outside the photovoltaic panel. However, the nozzles in the existing technology cannot adaptively adjust the direction of the liquid sprayed by the nozzle according to the flight attitude and hovering position of the aircraft.

[0004] Therefore, how to prevent the liquid sprayed by the unmanned aerial vehicle from exceeding the desired spraying coverage range is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered to constitute information on the prior art. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a multi-functional unmanned aerial vehicle for cleaning photovoltaic panels and a method for cleaning the edges of photovoltaic panels.

[0007] In a first aspect, the embodiments of the present disclosure provide a multi-functional unmanned aerial vehicle for cleaning photovoltaic panels, including:

[0008] An aircraft body;

[0009] Extension frames, a plurality of the extension frames are arranged circumferentially around the aircraft body;

[0010] A spraying device, which is arranged at the lower end of the extension frame;

[0011] A protection device, which is sleeved on the outer wall of the spraying device in a lifting manner and is adapted to limit the orientation of the liquid sprayed by the spraying device;

[0012] Wherein, when the turntable of the spraying device rotates to spray the liquid in all directions, the protection device moves downward to surround the outside of the turntable to limit the spraying coverage range of the turntable.

[0013] In an alternative embodiment, a connecting rod is arranged vertically in the middle of the extension frame, and a horizontal rod is arranged at the lower end of the connecting rod, and the horizontal rod is parallel to the extension frame;

[0014] Every two of the spraying devices are respectively arranged at both ends of the horizontal rod;

[0015] A liquid storage cylinder is arranged on the machine body, and the liquid storage cylinder is communicated with the spraying device through a pipeline.

[0016] In an alternative embodiment, the spraying device includes: a fixed cylinder, which is arranged at the lower end of the horizontal rod and is communicated with the liquid storage cylinder;

[0017] A driving motor, which is arranged in the fixed cylinder, and there is a gap between the outer wall of the driving motor and the inner wall of the fixed cylinder;

[0018] A turntable, which is arranged at the end of the rotating shaft of the driving motor;

[0019] Diffusion blocks, and a plurality of the diffusion blocks are arranged circumferentially around the turntable at equal intervals;

[0020] Wherein, the liquid in the liquid storage cylinder flows to the turntable through the fixed cylinder, and then the turntable drives the diffusion blocks to rotate to spray the liquid around.

[0021] In an alternative embodiment, the protection device includes: a driving cylinder, which is arranged on the outer wall of the horizontal rod,

[0022] A protective sleeve, which is arranged at the end of the piston rod of the driving cylinder and sleeved on the outer wall of the fixed cylinder;

[0023] The inner diameter of the protective sleeve is not less than the outer diameter of the turntable;

[0024] Wherein, when the driving cylinder drives the protective sleeve to move downward, the protective sleeve is adapted to limit the spraying direction of the liquid on the turntable.

[0025] In an alternative embodiment, the bottom wall of the protective sleeve is inclined, and the bottom wall of the protective sleeve gradually decreases from one side to the other side;

[0026] Wherein, when the machine body flies horizontally on the photovoltaic panel, the lowest point of one protective sleeve is close to an outer edge of the photovoltaic panel.

[0027] In an alternative embodiment, a plurality of cleaning blocks are arranged at equal intervals on the inner wall of the protective sleeve, one cleaning block corresponds to one diffusion block, and the width of the cleaning block is not greater than the distance between adjacent two diffusion blocks; wherein, when the cleaning block is inserted between two diffusion blocks, it is adapted to clean the impurities between the two diffusion blocks.

[0028] In an alternative embodiment, an inclined surface is provided on the bottom wall of each of the cleaning blocks. The inclined surface is arc-shaped and extends from one end of the cleaning block close to the protective sleeve to the other end.

[0029] Wherein, when the lowest point of the bottom wall of the protective sleeve is lower than the turntable, the inclined surface on the bottom wall of the cleaning block is adapted to guide the liquid diffused outward through the diffusion block, so that the liquid is sprayed onto the outer wall of the fixed cylinder.

[0030] In an alternative embodiment, a guiding surface is respectively provided on both sides of the bottom wall of each of the cleaning blocks. The guiding surface is adapted to abut against the upper end edge sharp corners of the diffusion blocks.

[0031] Wherein, when the protective sleeve moves downward until the guiding surface abuts against the diffusion block, the guiding surface is adapted to push the turntable to rotate, so that the cleaning block is inserted between the two diffusion blocks.

[0032] In an alternative embodiment,

[0033] Spraying device;

[0034] Protective device, which is sleeved on the outer wall of the spraying device in a lifting manner;

[0035] Wherein, when the turntable of the spraying device rotates to spray the liquid around, the protective device moves downward to surround the outside of the turntable to limit the coverage range of the spraying of the turntable.

[0036] In an alternative embodiment, the bottom wall of the protective sleeve is inclined, and the bottom wall of the protective sleeve gradually decreases from one side to the other side;

[0037] Wherein, when the aircraft body flies horizontally on the photovoltaic panel, the lowest point of one protective sleeve is close to an outer edge of the photovoltaic panel.

[0038] In an alternative embodiment, a plurality of cleaning blocks are equidistantly arranged on the inner wall of the protective sleeve. One cleaning block corresponds to one diffusion block, and the width of the cleaning block is not greater than the distance between adjacent two diffusion blocks;

[0039] An inclined surface is provided on the bottom wall of each of the cleaning blocks. The inclined surface is arc-shaped and extends from one end of the cleaning block close to the protective sleeve to the other end.

[0040] Wherein, when the lowest point of the bottom wall of the protective sleeve is lower than the turntable, the inclined surface on the bottom wall of the cleaning block is adapted to guide the liquid diffused outward through the diffusion block, so that the liquid is sprayed onto the outer wall of the fixed cylinder.

[0041] Second aspect, the embodiments of the present disclosure also provide a method for cleaning the edge of a photovoltaic panel, including:

[0042] The aircraft body flies horizontally on the photovoltaic panel, and the turntable of the spraying device rotates to evenly spray the liquid onto the surface of the photovoltaic panel;

[0043] The machine body moves to the edge close to the photovoltaic panel, and the corresponding protective device moves downward to limit the direction of the liquid sprayed by the spraying device.

[0044] The beneficial effect of the present invention is that a multifunctional photovoltaic panel cleaning drone and its cleaning method of the present invention, through the setting of the protective device, when the machine body moves to the outer edge close to the photovoltaic panel, the corresponding protective device moves downward to limit the direction of the liquid sprayed by the spraying device, and the protective sleeve limits the sprayed liquid, avoiding the liquid splashing outside the photovoltaic panel and avoiding the corrosion of the sprayed self-cleaning liquid on the surrounding environment.

[0045] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification, claims, and drawings.

[0046] To make the above objectives, features, and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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 for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 A three-dimensional view of the multifunctional photovoltaic panel cleaning drone provided by the embodiment of the present disclosure;

[0049] Figure 2 A three-dimensional view of the spraying device provided by the embodiment of the present disclosure;

[0050] Figure 3 A three-dimensional view of the protective device provided by the embodiment of the present disclosure;

[0051] Figure 4 A sectional three-dimensional view of the protective sleeve provided by the embodiment of the present disclosure;

[0052] Figure 5 A schematic diagram of the state of the partial limit turntable of the protective sleeve provided by the embodiment of the present disclosure;

[0053] Figure 6 A top view of the cross-section along the upper surface of the diffusion block provided by the embodiment of the present disclosure.

[0054] In the figure:

[0055] 1. Machine body; 11. Liquid storage cylinder; 12. Propeller;

[0056] 2. Extension frame; 21. Connecting rod; 22. Horizontal rod;

[0057] 3. Spraying device; 31. Fixed cylinder; 32. Driving motor; 33. Turntable; 34. Diffusion block;

[0058] 4. Protection device; 41. Driving cylinder; 42. Protective sleeve; 43. Cleaning block; 44. Inclined surface; 45. Guiding surface. Detailed implementation manners

[0059] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0060] In this document, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, for the effective description of the technical content, the thickness of the components may be exaggerated or reduced.

[0061] In this document, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0062] The terms used herein are only for describing specific exemplary configurations and are not intended to be restrictive. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly stated otherwise in the context. The terms "include", "comprise", and "have" are inclusive, and thus specify the presence of the specified features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as the order of execution. Additional or alternative steps may be employed.

[0063] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after such phrase can be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0064] It has been found through research that the disadvantages of the prior art are as follows: In order to reduce costs, drones are mostly used to spray self-cleaning liquid to form a self-cleaning coating on the surface of photovoltaic panels. However, the self-cleaning liquid has certain corrosive properties. Therefore, when the drone sprays the surface of the photovoltaic panel, it is necessary to prevent the self-cleaning liquid sprayed from the nozzle of the drone from splashing outside the photovoltaic panel. However, the nozzles in the prior art cannot limit the direction of the liquid sprayed from the nozzle. When the drone moves to the edge position of the photovoltaic panel, the sprayed self-cleaning liquid will cause corrosion and other impacts on the surrounding environment.

[0065] Therefore, how to prevent the liquid sprayed by the drone from splashing outside the edge of the photovoltaic panel is a technical problem that urgently needs to be solved in the art.

[0066] All the defects existing in the above solutions are the results obtained by the inventors through practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed in the present disclosure by the present disclosure for the above problems should be the contributions made by the inventors to the present disclosure during the process of the present disclosure.

[0067] It should be noted that: Similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0068] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0069] As Figures 1 to 6As shown, some embodiments provide a multi-functional photovoltaic panel cleaning drone, including: a machine body 1; an extension frame 2, with several of the extension frames 2 arranged circumferentially around the machine body 1; a spraying device 3, which is arranged at the lower end of the extension frame 2; the spraying device 3 is communicated with a liquid storage cylinder 11, and the liquid storage cylinder 11 is adapted to convey liquid to the spraying device 3. The liquid in this embodiment is a self-cleaning liquid. A protective device 4, which is sleeved on the outer wall of the spraying device 3 in a lifting manner and is adapted to limit the direction of the liquid sprayed by the spraying device 3; for each protective device 4 of the machine body 1, its lowest point faces different edges of the photovoltaic panel. Therefore, when the machine body 1 moves to a position close to any edge of the photovoltaic panel, a corresponding protective device 4 moves downward. Among them, when the turntable 33 of the spraying device 3 rotates to spray the liquid all around, the protective device 4 moves downward to surround the outside of the turntable 33 to limit the coverage range of the liquid sprayed by the turntable 33; when the machine body 1 moves to a position close to the edge of the photovoltaic panel, the corresponding protective device 4 moves downward to limit the direction of the liquid sprayed by the spraying device 3. Through the setting of the protective device 4, when the machine body 1 moves to a position close to the outer edge of the photovoltaic panel, the corresponding protective device 4 moves downward to limit the direction of the liquid sprayed by the spraying device 3, and the protective sleeve 42 limits the sprayed liquid, preventing the liquid from splashing outside the photovoltaic panel and avoiding the corrosive effect of the sprayed self-cleaning liquid on the surrounding environment.

[0070] Refer to the attached Figure 1 , a connecting rod 21 is arranged vertically in the middle of the extension frame 2, a horizontal rod 22 is arranged at the lower end of the connecting rod 21, and the horizontal rod 22 is parallel to the extension frame 2; one extension frame 2 corresponds to one propeller 12, and the propeller 12 is arranged at the end of the connecting rod 21 away from the machine body 1, and the propeller 12 is adapted to drive the machine body 1 to fly. Each two of the spraying devices 3 are respectively arranged at both ends of the horizontal rod 22; a liquid storage cylinder 11 is arranged on the machine body 1, and the liquid storage cylinder 11 is communicated with the spraying device 3 through a pipeline. After the liquid in the liquid storage cylinder 11 flows to the spraying device 3, the turntable 33 rotates circumferentially to spray the liquid outward, and the setting of several diffusion blocks 34 can make the sprayed liquid in a water mist shape, so that the liquid can be sprayed evenly outward.

[0071] Refer to the attached Figure 2, the spraying device 3 includes: a fixed cylinder 31, which is arranged at the lower end of the horizontal rod 22 and is communicated with the liquid storage cylinder 11; the fixed cylinder 31 is communicated with the liquid storage cylinder 11 through a pipeline. After the liquid in the liquid storage cylinder 11 is transported into the fixed cylinder 31, it flows downward through the gap between the lower end of the fixed cylinder 31 and the turntable 33; a driving motor 32, which is arranged in the fixed cylinder 31, and there is a gap between the outer wall of the driving motor 32 and the inner wall of the fixed cylinder 31; a plurality of connecting rods 21 are arranged radially along the outer wall of the driving motor 32, the outer ends of the connecting rods 21 are fixed on the inner wall of the fixed cylinder 31, the connecting rods 21 are adapted to support and fix the driving motor 32, the driving motor 32 is a waterproof motor, and when the liquid flows downward between the outer wall of the driving motor 32 and the inner wall of the fixed cylinder 31, the liquid can also cool down the motor. A turntable 33, which is arranged at the end of the rotating shaft of the driving motor 32; there is a gap between the upper edge of the turntable 33 and the bottom wall of the fixed cylinder 31 to facilitate the downward flow of the liquid in the fixed cylinder 31. Preferably, the diameter of the turntable 33 is larger than the outer diameter of the fixed cylinder 31. A diffusion block 34, a plurality of the diffusion blocks 34 are arranged circumferentially around the turntable 33 at equal intervals; wherein, after the liquid in the liquid storage cylinder 11 flows through the fixed cylinder 31 to the turntable 33, the turntable 33 drives the diffusion blocks 34 to rotate to spray the liquid around.

[0072] Reference appendix Figure 2 and Figure 3 , the protection device 4 includes: a driving cylinder 41, which is arranged on the outer wall of the horizontal rod 22, the driving cylinder 41 is parallel to the fixed cylinder 31, a protective sleeve 42, which is arranged at the end of the piston rod of the driving cylinder 41 and sleeved on the outer wall of the fixed cylinder 31; the driving cylinder 41 is adapted to drive the protective sleeve 42 to move up and down relative to the fixed cylinder 31. When the lower end of the protective sleeve 42 is lower than the turntable 33, the protective sleeve 42 is adapted to limit the spraying direction of the liquid sprayed by the turntable 33. The inner diameter of the protective sleeve 42 is not less than the outer diameter of the turntable 33; wherein, when the driving cylinder 41 drives the protective sleeve 42 to move downward, the protective sleeve 42 is adapted to limit the spraying direction of the liquid on the turntable 33.

[0073] Reference appendix Figure 4 , the bottom wall of the protective sleeve 42 is inclined, and the bottom wall of the protective sleeve 42 gradually decreases from one side to the other side; wherein, when the machine body 1 flies horizontally on the photovoltaic panel, the lowest point of one protective sleeve 42 is close to an outer edge of the photovoltaic panel. Reference appendix Figure 6, when the machine body 1 moves to a position close to the outer edge of the photovoltaic panel, the driving cylinder 41 drives the protective sleeve 42 to move downward until the lowest point of the protective sleeve 42 is lower than the turntable 33. At this time, the circumferential rotation of the turntable 33 cannot spray the liquid 360 degrees around. The protective sleeve 42 blocks part of the spraying direction of the liquid. At this time, the spraying direction of the liquid is less than 300 degrees, so as to prevent the liquid sprayed on the turntable from splashing onto the external area of the photovoltaic panel.

[0074] Reference appendix Figure 4 , a number of cleaning blocks 43 are equidistantly arranged on the inner wall of the protective sleeve 42. One cleaning block 43 corresponds to one diffusion block 34, and the width of the cleaning block 43 is not greater than the distance between two adjacent diffusion blocks 34. When the protective sleeve 42 moves downward until one cleaning block 43 is inserted between two corresponding diffusion blocks 34, it is suitable for cleaning the impurities between the two diffusion blocks 34, thus avoiding the blockage of the space between the two diffusion blocks 34 by impurities. Further, an inclined surface 44 is provided on the bottom wall of each cleaning block 43. The inclined surface 44 is arc-shaped and extends from the end of the cleaning block 43 close to the protective sleeve 42 to the other end. When the lowest point of the bottom wall of the protective sleeve 42 is lower than the turntable 33, at this time, the protective sleeve 42 completely covers the outside of the turntable 33. When the turntable 33 rotates and sprays the liquid outward, the liquid is blocked by the inner wall of the protective sleeve 42 and flows upward and downward respectively. Part of the liquid flows upward, and the inclined surface 44 is suitable for guiding the liquid to gradually flow upward towards the outer wall of the fixed cylinder 31. The inclined surface 44 on the bottom wall of the cleaning block 43 is suitable for guiding the liquid diffused outward through the diffusion block 34 so that the liquid is sprayed towards the outer wall of the fixed cylinder 31 to achieve the effect of cleaning the outer wall of the fixed cylinder 31. Further, when the protective sleeve 42 completely covers the outside of the turntable 33, the liquid in the liquid storage cylinder 11 is a detergent, which is suitable for cleaning the residual self-cleaning liquid on the inner wall of the protective sleeve 42 and the outer wall of the fixed cylinder 31.

[0075] Reference appendix Figure 4 , guiding surfaces 45 are respectively provided on both sides of the bottom wall of each cleaning block 43. The guiding surfaces 45 are suitable for abutting against the upper edge sharp corners of the diffusion blocks 34. When the protective sleeve 42 moves downward until the guiding surfaces 45 abut against the diffusion blocks 34, the guiding surfaces 45 are suitable for pushing the turntable 33 to rotate so that the cleaning block 43 is inserted between the two diffusion blocks 34.

[0076] Some embodiments provide a spraying mechanism for a photovoltaic panel cleaning drone, including:

[0077] A spraying device 3, which is arranged at the end of the horizontal rod 22;

[0078] A protection device 4, which is sleeved on the outer wall of the spraying device 3 in a lifting manner. When the turntable 33 of the spraying device 3 rotates to spray the liquid around, the protection device 4 moves downward to surround the outside of the turntable 33 to limit the coverage range of the turntable spraying.

[0079] Further, the bottom wall of the protective sleeve 42 is inclined, and the bottom wall of the protective sleeve 42 gradually decreases from one side to the other side;

[0080] Among them, when the machine body 1 flies horizontally on the photovoltaic panel, the lowest point of one protective sleeve 42 is close to an outer edge of the photovoltaic panel.

[0081] Further, a plurality of cleaning blocks 43 are arranged at equal intervals on the inner wall of the protective sleeve 42, one cleaning block 43 corresponds to one diffusion block 34, and the width of the cleaning block 43 is not greater than the distance between adjacent two diffusion blocks 34;

[0082] The bottom wall of each cleaning block 43 is provided with an inclined surface 44, the inclined surface 44 is arc-shaped, and the inclined surface 44 extends from one end of the cleaning block 43 close to the protective sleeve 42 to the other end;

[0083] Among them, when the lowest point of the bottom wall of the protective sleeve 42 is lower than the turntable 33, the inclined surface 44 of the bottom wall of the cleaning block 43 is adapted to guide the liquid diffused outward through the diffusion block 34, so that the liquid is sprayed onto the outer wall of the fixed cylinder 31.

[0084] Some embodiments provide a method for cleaning the edge of a photovoltaic panel, and the cleaning method includes:

[0085] The machine body 1 flies horizontally on the photovoltaic panel, and the turntable 33 of the spraying device 3 rotates to evenly spray the liquid onto the surface of the photovoltaic panel;

[0086] The machine body 1 moves to the edge close to the photovoltaic panel, and the corresponding protective device 4 moves downward to limit the orientation of the liquid sprayed by the spraying device 3.

[0087] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0088] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply an order or sequence unless explicitly indicated in the text. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0089] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multifunctional unmanned aerial vehicle for cleaning photovoltaic panels, characterized in that, Comprising: Machine body (1); Extension frames (2), a plurality of the extension frames (2) are arranged circumferentially around the machine body (1); Spraying device (3), which is arranged at the lower end of the extension frame (2); Protection device (4), which is sleeved on the outer wall of the spraying device (3) in a lifting manner; Wherein, when the turntable (33) of the spraying device (3) rotates to spray liquid all around, the protection device (4) moves downward to surround the outside of the turntable (33) to limit the coverage range of the turntable spraying; A connecting rod (21) is arranged vertically in the middle of the extension frame (2), and a horizontal rod (22) is arranged at the lower end of the connecting rod (21); The spraying device (3) includes: a fixed cylinder (31), which is arranged at the lower end of the horizontal rod (22) and is communicated with the liquid storage cylinder (11); A driving motor (32), which is arranged in the fixed cylinder (31), and there is a gap between the outer wall of the driving motor (32) and the inner wall of the fixed cylinder (31); A turntable (33), which is arranged at the end of the rotating shaft of the driving motor (32); Diffusion blocks (34), a plurality of the diffusion blocks (34) are arranged circumferentially around the turntable (33) at equal intervals; Wherein, after the liquid in the liquid storage cylinder (11) flows through the fixed cylinder (31) to the turntable (33), the turntable (33) drives the diffusion blocks (34) to rotate to spray the liquid all around; The protection device (4) includes: a protection sleeve (42), the inner diameter of which is not less than the outer diameter of the turntable (33); The bottom wall of the protection sleeve (42) is inclined, and the bottom wall of the protection sleeve (42) gradually decreases from one side to the other side; Wherein, when the machine body (1) flies horizontally on the photovoltaic panel, the lowest point of a protection sleeve (42) is close to an outer edge of a place on the photovoltaic panel; When the machine body (1) moves to the edge close to the photovoltaic panel, the corresponding protection device (4) moves downward to limit the spraying direction of the liquid sprayed by the spraying device (3).

2. The multi-functional unmanned aerial vehicle according to claim 1, wherein The horizontal rod (22) is parallel to the extension frame (2); Each two of the spraying devices (3) are respectively arranged at both ends of the horizontal rod (22); A liquid storage cylinder (11) is arranged on the machine body (1), and the liquid storage cylinder (11) is communicated with the spraying device (3) through a pipeline.

3. The multi-functional unmanned aerial vehicle according to claim 2, wherein The protection device (4) includes: a driving cylinder (41), which is arranged on the outer wall of the horizontal rod (22), A protection sleeve (42), which is arranged at the end of the piston rod of the driving cylinder (41) and is sleeved on the outer wall of the fixed cylinder (31); Wherein, when the driving cylinder (41) drives the protection sleeve (42) to move downward, the protection sleeve (42) is adapted to limit the spraying direction of the liquid on the turntable (33).

4. The multi-functional unmanned aerial vehicle according to claim 3, wherein A plurality of cleaning blocks (43) are arranged at equal intervals on the inner wall of the protective sleeve (42). One cleaning block (43) corresponds to one diffusion block (34), and the width of the cleaning block (43) is not greater than the distance between two adjacent diffusion blocks (34). When the cleaning block (43) is inserted between the two diffusion blocks (34), it is suitable for cleaning the impurities between the two diffusion blocks (34).

5. The multi-functional unmanned aerial vehicle according to claim 4, wherein An inclined surface (44) is arranged on the bottom wall of each cleaning block (43). The inclined surface (44) is arc-shaped and extends from one end of the cleaning block (43) close to the protective sleeve (42) to the other end. When the lowest point of the bottom wall of the protective sleeve (42) is lower than the turntable (33), the inclined surface (44) on the bottom wall of the cleaning block (43) is suitable for guiding the liquid diffused outward through the diffusion block (34) so that the liquid is sprayed onto the outer wall of the fixed cylinder (31).

6. The multi-functional unmanned aerial vehicle according to claim 5, wherein A guiding surface (45) is arranged on each side of the bottom wall of each cleaning block (43). The guiding surface (45) is suitable for abutting against the upper edge sharp corner of the diffusion block (34). When the protective sleeve (42) moves downward until the guiding surface (45) abuts against the diffusion block (34), the guiding surface (45) is suitable for pushing the turntable (33) to rotate so that the cleaning block (43) is inserted between the two diffusion blocks (34).

7. A method for cleaning the edge of a photovoltaic panel, characterized in that, Using the multi-functional unmanned aerial vehicle according to any one of claims 1-6, the method for cleaning the edge of the photovoltaic panel comprises: The aircraft body (1) flies horizontally on the photovoltaic panel, and the turntable (33) of the spraying device (3) rotates to uniformly spray the liquid onto the surface of the photovoltaic panel. The aircraft body (1) moves to the edge close to the photovoltaic panel, and the corresponding protection device (4) moves downward to limit the direction of the liquid sprayed by the spraying device (3).

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