Photovoltaic self-cleaning device

Abstract

The utility model provides a photovoltaic self-cleaning device, which comprises a photovoltaic panel and a purging assembly, the photovoltaic panel is provided with a light receiving surface and a backlight surface, the purging assembly is mounted on the ground, the purging assembly is provided with an air inlet pipe and an air outlet pipe which are communicated with each other, the air inlet pipe is provided with an air inlet, and the air outlet pipe is provided with an air outlet. The air outlet is located above the photovoltaic panel and faces the light receiving face of the photovoltaic panel, and the section of the air outlet pipe in the air outlet direction is gradually reduced. According to the photovoltaic self-cleaning device disclosed by the utility model, automatic dust removal of the photovoltaic panel can be realized by utilizing natural wind, so that dust attached to the photovoltaic panel is effectively cleaned, the photovoltaic panel is kept clean, the power generation efficiency of the photovoltaic panel is improved, and the service life of the photovoltaic panel is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic self-cleaning device. Background Art

[0002] In areas with frequent and heavy dust storms, the operation of solar photovoltaic modules faces many challenges. Due to the unique climatic conditions in these areas, dust will continue to adhere to and settle on the surface of photovoltaic panels, resulting in the inability of photovoltaic panels to fully receive and utilize solar radiation energy, thus seriously affecting their power generation efficiency.

[0003] In the related technology, most photovoltaic power stations use manual water washing to clean photovoltaic panels. However, manual water washing consumes a lot of water resources, especially in areas where water resources are relatively scarce. This cleaning method is obviously not economical and difficult to sustain. At the same time, water washing is often difficult to completely remove the hard sand and dust attached to the photovoltaic panels, and if the washing force is not appropriate, it may also cause damage to the surface of the photovoltaic panels. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems in the related art to a certain extent. To this end, a photovoltaic self-cleaning device is proposed in the embodiment of the utility model, which can use natural wind to realize automatic dust removal of photovoltaic panels, thereby effectively cleaning sand and dust attached to photovoltaic panels, keeping photovoltaic panels clean, and improving their power generation efficiency and service life.

[0005] The photovoltaic self-cleaning device provided by the embodiment of the utility model includes a photovoltaic panel and a purge assembly, the photovoltaic panel has a light-receiving surface and a backlight surface, the purge assembly is installed on the ground, the purge assembly has a connected air inlet pipe and air outlet pipe, the air inlet pipe has an air inlet, the air outlet pipe has an air outlet, the air outlet is located above the photovoltaic panel, the air outlet is arranged toward the light-receiving surface of the photovoltaic panel, and the cross-sectional area of ​​the air outlet pipe in the air outlet direction gradually decreases.

[0006] The photovoltaic self-cleaning device disclosed in the embodiment of the utility model introduces natural wind into the purge assembly through the air inlet, and guides it to the light-receiving surface of the photovoltaic panel through the air outlet, thereby realizing automatic cleaning of the photovoltaic panel, which can not only keep the photovoltaic panel clean and improve the power generation efficiency, but also reduce the cost of manual cleaning and environmental pollution.

[0007] In some embodiments, the air outlet duct has a first side wall and a second side wall that are arranged opposite to each other, the first side wall is located above the second side wall, and the projection of the edge of the first side wall on the light-receiving surface is flush with the bottom edge of the photovoltaic panel.

[0008] In some embodiments, the air inlet duct has a third side wall and a bottom wall that are relatively arranged, the third side wall is located above the bottom wall, the third side wall is arranged parallel to the photovoltaic panel, and the air inlet is arranged on the backlight side of the photovoltaic panel.

[0009] In some embodiments, the distance between the second side wall and the photovoltaic panel is greater than or equal to a first threshold;

[0010] And / or, the distance between the third side wall and the photovoltaic panel is greater than or equal to a second threshold.

[0011] In some embodiments, the bottom wall has a first end and a second end that are arranged opposite to each other, the first end is located at the air inlet, and the second end of the bottom wall is higher than the first end of the bottom wall in the vertical direction of the photovoltaic panel.

[0012] In some embodiments, the photovoltaic self-cleaning device further comprises a fixing seat, the fixing seat is mounted on the ground, and the fixing seat is connected to the bottom wall.

[0013] In some embodiments, the fixing seat includes a plurality of limit blocks, parts of the limit blocks are buried underground, and the plurality of limit blocks are correspondingly arranged around the purge assembly.

[0014] In some embodiments, the purge assembly further includes a flow guide pipe, which is connected between the air inlet pipe and the air outlet pipe, and the flow guide pipe is configured to be U-shaped.

[0015] In some embodiments, an organ pipe is provided between the air inlet pipe and the flow guide pipe.

[0016] In some embodiments, the air outlet pipe and the air inlet pipe are both made of hard, corrosion-resistant, lightweight plastic; and / or the width of the air outlet is consistent with the width of the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a photovoltaic self-cleaning device provided in an embodiment of the utility model.

[0018] Figure 2 It is a structural schematic diagram of a photovoltaic self-cleaning device provided by an embodiment of the utility model installed on the ground.

[0019] Figure numerals: 10, photovoltaic panel; 11, light-receiving surface; 12, backlight surface; 20, purge assembly; 21, air inlet pipe; 211, air inlet; 212, third side wall; 213, bottom wall; 2131, first end; 2132, second end; 22, air outlet pipe; 221, air outlet; 222, first side wall; 223, second side wall; 23, guide pipe; 30, fixing seat; 31, limit block. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0021] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a photovoltaic self-cleaning device, which includes a photovoltaic panel 10 and a purge assembly 20. The photovoltaic panel 10 has a light-receiving surface 11 and a backlight surface 12. The purge assembly 20 is installed on the ground. The purge assembly 20 has an air inlet pipe 21 and an air outlet pipe 22 that are connected. The air inlet pipe 21 has an air inlet 211, and the air outlet pipe 22 has an air outlet 221. The air outlet 221 is located above the photovoltaic panel 10, and the air outlet 221 is arranged toward the light-receiving surface 11 of the photovoltaic panel 10. The cross-sectional area of ​​the air outlet pipe 22 in the wind direction of the air outlet gradually decreases, so that natural wind can be used to realize automatic cleaning of the photovoltaic panel 10, thereby effectively cleaning the sand and dust attached to the photovoltaic panel 10, keeping the photovoltaic panel 10 clean, and improving its power generation efficiency and service life.

[0022] Specifically, the photovoltaic panel 10 can be fixed to the ground through a mounting frame or a supporting frame to achieve the installation and fixation of the photovoltaic panel 10. The purge assembly 20 can be installed on the ground. Compared with the purge assembly 20 installed on the photovoltaic panel 10, it can prevent the photovoltaic panel 10 from vibrating due to the natural wind flowing in the purge assembly 20 and affecting the normal operation of the photovoltaic panel 10, which helps to ensure the stable operation of the photovoltaic panel 10, and also makes it more convenient for daily maintenance, inspection and replacement of the purge assembly 20.

[0023] Moreover, the cross-sectional area of ​​the air outlet pipe 22 in the air outlet direction gradually decreases, especially the cross-sectional area of ​​the air outlet pipe 22 at the air outlet 221 is smaller than the cross-sectional area of ​​the air inlet pipe 21 at the air inlet 211, so as to form a structure similar to a Venturi tube, so that the natural wind is accelerated to form a stronger airflow when passing through the air outlet 221, which can more effectively remove the sand and dust on the photovoltaic panel 10. It should be noted that, Figure 2 The direction indicated by the inner arrow is the flow direction of the natural wind in the purge assembly 20, which is also the air outlet direction in the air outlet pipe.

[0024] In this embodiment, the photovoltaic panel 10 can be fixed to the ground with a steel bracket, and the purge assembly 20 can be directly fixed to the ground, that is, the photovoltaic panel 10 and the purge assembly 20 are installed separately, so as to avoid the purge assembly 20 from acting on the steel bracket of the photovoltaic panel 10 to increase the dynamic and static loads of the steel bracket, so that the installation of the photovoltaic panel 10 and the purge assembly 20 do not affect each other, and the project cost can be reduced.

[0025] Furthermore, the air inlet 211 of the purge assembly 20 can be installed to cater to the dominant wind direction of the area where the photovoltaic panel 10 is located, so as to ensure that the purge assembly 20 can obtain the wind source stably. In other words, under the action of wind, air can enter the purge assembly 20 more smoothly, providing it with a continuous and stable airflow, thereby ensuring the normal operation of the purge assembly 20.

[0026] In summary, it can be seen that the photovoltaic self-cleaning device disclosed in the embodiment of the utility model introduces natural wind into the purge assembly 20 through the air inlet 211, and guides it to the light-receiving surface 11 of the photovoltaic panel 10 through the air outlet 221, thereby realizing automatic dust removal of the photovoltaic panel 10, which can not only keep the photovoltaic panel 10 clean and improve the power generation efficiency, but also reduce the cost of manual cleaning and environmental pollution.

[0027] In some embodiments, the air outlet duct 22 has a first side wall 222 and a second side wall 223 that are relatively arranged. The first side wall 222 is located above the second side wall 223. The projection of the edge of the first side wall 222 on the light-receiving surface 11 is flush with the bottom edge of the photovoltaic panel 10, thereby ensuring the cleanliness of the photovoltaic panel 10 while avoiding the air outlet duct 22 affecting the lighting of the photovoltaic panel 10.

[0028] Furthermore, the first side wall 222 and the second side wall 223 are both inclined toward the light-receiving surface 11 of the photovoltaic panel 10 , so that the air duct 22 has an inclined angle, which helps to guide the airflow to flow in a specific direction, thereby more effectively cleaning the photovoltaic panel 10 .

[0029] Furthermore, the second side wall 223 is arranged relative to the first side wall 222 and close to the photovoltaic panel 10, that is, the second side wall 223 is located between the first side wall 222 and the photovoltaic panel 10, and the distance between the second side wall 223 and the photovoltaic panel 10 is greater than or equal to the first threshold value, so that in strong winds, the vibration of the photovoltaic panel 10 can hit the second side wall 223 and affect the stability of the purge assembly 20.

[0030] That is, there is a gap between the second side wall 223 and the photovoltaic panel 10, so that a buffer zone is formed between the second side wall 223 and the photovoltaic panel 10, and there is a safe distance. Even if the photovoltaic panel 10 is affected by the wind and vibrates, it will not easily hit the second side wall 223, which can avoid direct collision between the photovoltaic panel 10 and the air outlet pipe 22, reducing the potential risk of damage, and at the same time ensuring the stable operation of the purge assembly 20, which will not be disturbed by the vibration of the photovoltaic panel 10. Figure 2 As shown, the distance between the second side wall 223 and the photovoltaic panel 10 is A, and A is greater than or equal to the first threshold.

[0031] Optionally, the first threshold value may be set to 1 cm, 2 cm, 5 cm, etc. It should be noted that the first threshold value may be determined after model calculation or testing according to the geographical location of the photovoltaic panel 10 and the environmental wind conditions.

[0032] In this embodiment, the width of the air outlet 221 is consistent with the width of the photovoltaic panel 10, which can ensure that the airflow of the air outlet 221 can evenly cover the width of the entire photovoltaic panel 10. When the airflow blows out from the air outlet 221, it can directly act on the surface of the photovoltaic panel 10, thereby achieving uniform sweeping of the entire surface of the photovoltaic panel 10. Secondly, the width of the air outlet 221 matches the width of the photovoltaic panel 10, which can also reduce the loss and waste of airflow. If the air outlet 221 is too wide, the airflow may be too dispersed and cannot effectively act on the photovoltaic panel 10; if the air outlet 221 is too narrow, it may cause the airflow velocity to be too fast, causing unnecessary impact on the surface of the photovoltaic panel 10.

[0033] In addition, this design is also aesthetically pleasing. The width of the air outlet 221 is consistent with the width of the photovoltaic panel 10, so that the entire purge assembly 20 and the photovoltaic panel 10 present a coordinated and unified effect visually, thereby improving the overall aesthetics of the entire photovoltaic system.

[0034] In some embodiments, the air inlet duct 21 has a third side wall 212 and a bottom wall 213 that are relatively arranged, the third side wall 212 is located above the bottom wall 213, the third side wall 212 is arranged parallel to the photovoltaic panel 10, and the air inlet 211 is arranged on the side of the backlight surface 12 of the photovoltaic panel 10.

[0035] Specifically, the bottom wall 213 can be installed correspondingly to the ground, the third side wall 212 is parallel to the photovoltaic panel 10, and the third side wall 212 is arranged in contact with the backlight surface 12 of the photovoltaic panel 10, so that a trumpet-shaped air inlet 211 can be formed between the photovoltaic panel 10 and the ground, thereby increasing the air inlet area, further gathering natural wind, improving the air intake effect, and helping to improve the utilization rate of the wind source, thereby improving the blowing intensity of the blowing assembly 20.

[0036] Furthermore, the air inlet 211 is arranged on the backlight surface 12 side of the photovoltaic panel 10, which can avoid the temperature rise caused by direct sunlight, thereby keeping the temperature of the airflow in the air inlet pipe 21 relatively low. During operation, the low-temperature airflow can more effectively remove dust and dirt on the surface of the photovoltaic panel 10 when passing through the purge assembly 20.

[0037] Furthermore, the distance between the third side wall 212 and the photovoltaic panel 10 is greater than or equal to the second threshold value, so that friction or collision between the third side wall 212 and the photovoltaic panel 10 can be avoided. Under the action of wind, the photovoltaic panel 10 may produce slight vibration or displacement. If the distance between the third side wall 212 and the photovoltaic panel 10 is too small, contact may occur, which may not only cause damage to the surface of the photovoltaic panel 10, but also affect the normal operation of the purge assembly 20. Figure 2 As shown, the distance between the third side wall 212 and the photovoltaic panel 10 is B, and B is greater than or equal to the second threshold.

[0038] Optionally, the second threshold value may be set to be the same as the first threshold value, so that the third side wall 212 and the second side wall 223 are symmetrically arranged on both sides of the photovoltaic panel 10, which can simplify the design and manufacturing process.

[0039] In some embodiments, the bottom wall 213 has a first end 2131 and a second end 2132 that are relatively arranged, the first end 2131 is located at the air inlet 211, and the second end 2132 of the bottom wall 213 is higher than the first end 2131 of the bottom wall 213 in the vertical direction of the photovoltaic panel 10, so that after the sand and dust enter the air inlet pipe 21, they slide down the air inlet pipe 21 under the action of their own gravity.

[0040] Specifically, in the vertical direction of the photovoltaic panel 10, the second end 2132 of the bottom wall 213 is higher than the first end 2131 of the bottom wall 213, so that the bottom wall 213 presents an inclined angle in the vertical direction of the photovoltaic panel 10, and forms an inclined slope inside the air inlet pipe 21. After impurities such as sand and dust enter the air inlet pipe 21 through the air inlet port 211, due to their own gravity, they will slide downward along the inclined direction of the bottom wall 213 and accumulate at the air inlet port 211 of the air inlet pipe 21, making it easier for these accumulated impurities to be blown out, thereby effectively preventing impurities such as sand and dust from accumulating in the air inlet pipe 21, ensuring the smooth flow of the air inlet pipe 21 and the normal operation of the purge assembly 20, while also simplifying the cleaning of impurities and improving the maintenance efficiency of the entire photovoltaic system.

[0041] In some embodiments, the photovoltaic self-cleaning device further includes a fixing base 30, which is installed on the ground and connected to the bottom wall 213, so that the position of the purge assembly 20 relative to the photovoltaic panel 10 can be adjusted by adjusting the height of the fixing base 30, so that the purge assembly 20 can be arranged below the photovoltaic panel 10, or the purge assembly 20 can be arranged above the photovoltaic panel 10. In this embodiment, the purge assembly 20 is arranged below the photovoltaic panel 10 to have a smaller wind resistance, so that the overall structure of the purge assembly 20 is more stable.

[0042] Furthermore, the fixing seat 30 includes a plurality of limit blocks 31, parts of which are buried underground, and the plurality of limit blocks 31 are correspondingly arranged around the purge assembly 20. That is, the plurality of limit blocks 31 define and form an installation space for the purge assembly 20, so that the installation and fixation of the purge assembly 20 is more stable.

[0043] Optionally, the limit block 31 can be set as a stone pier or a concrete pier, and the space between the bottom wall 213 and the ground can be filled with sand, gravel, soil, etc., thereby reducing the support and fixing cost of the purge assembly and saving engineering investment.

[0044] Specifically, the limit block 31 can be buried around the bottom wall 213, so that the purge assembly 20 is effectively supported and fixed around. And partially burying the limit block 31 underground can ensure that a firm connection is formed between the limit block 31 and the ground, and it is not easy to loosen or shift due to wind or other external factors. At the same time, the buried part can also play a role in enhancing the stability of the limit block 31, further improving its load-bearing and pressure-resistant capabilities. Of course, in some embodiments, the fixing seat 30 can also be set as a scissor bracket, a hydraulic bracket, etc.

[0045] In some embodiments, the purge assembly 20 also includes a guide pipe 23, which is connected between the air inlet pipe 21 and the air outlet pipe 22. The guide pipe 23 is configured to be U-shaped, so that the natural wind from the backlight side 12 of the photovoltaic panel 10 can be more conveniently directed to the light-receiving side 11 of the photovoltaic panel 10, thereby making full use of the flow characteristics of the natural wind and ensuring that the purge assembly 20 effectively obtains the wind source without the need for additional energy consumption.

[0046] Furthermore, the area of ​​the air outlet 22 at the air outlet 221 is smaller than the cross-section of the guide pipe 23 , thereby enhancing the air outlet effect and more effectively removing dust on the photovoltaic panel 10 .

[0047] Furthermore, an accordion pipe is provided between the air inlet pipe 21 and the guide pipe 23, so that the air inlet pipe 21 can adjust the direction of the air inlet 211 according to the dominant wind direction in the area where the photovoltaic panel 10 is located, and the air outlet 221 of the air outlet pipe 22 can always remain facing the light-receiving surface 11 of the photovoltaic panel 10, thereby collecting and blowing air more efficiently.

[0048] Specifically, the organ pipe has good elasticity and bendability due to its unique structure and material. This allows the air inlet pipe 21 to adjust the direction of the air inlet 211 according to the change of the dominant wind direction through the expansion and contraction and bending of the organ pipe, which can not only improve the adaptability of the purge component 20 to the change of wind direction, but also ensure that the air inlet 211 can effectively capture the natural wind under any wind direction conditions, providing a stable wind source for the purge component 20.

[0049] Furthermore, the organ pipe also enhances the flexibility and reliability of the entire purge assembly 20. The elasticity and bendability of the organ pipe make the purge assembly 20 more convenient during installation and maintenance, and can be adjusted and optimized according to actual needs. At the same time, the organ pipe itself also has high durability and stability, and can maintain good working performance under various environmental conditions.

[0050] In some embodiments, the air inlet pipe 21 and the air outlet pipe 22 are both made of hard, corrosion-resistant, lightweight plastic, such as pcv, acrylic, etc., which can not only achieve the design goal of lightweight, but also improve the durability, stability and processing flexibility of the pipeline components, thereby reducing the overall cost of the photovoltaic system, improving the convenience of installation and maintenance, and providing effective support for the cleaning and maintenance of the photovoltaic system. Of course, in some embodiments, the air inlet pipe 21, the air outlet pipe 22 and the guide pipe 23 can be made of the same material.

[0051] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the present invention, the terms "one embodiment", "some embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A photovoltaic self-cleaning device, characterized in that: It includes a photovoltaic panel and a purge component, the photovoltaic panel has a light-receiving surface and a backlight surface; the purge component is installed on the ground, the purge component has a connected air inlet pipe and an air outlet pipe, the air inlet pipe has an air inlet, the air outlet pipe has an air outlet, the air outlet is located above the photovoltaic panel, the air outlet is set toward the light-receiving surface of the photovoltaic panel, and the cross-sectional area of ​​the air outlet pipe in the air outlet direction gradually decreases.

2. The photovoltaic self-cleaning device according to claim 1, characterized in that: The air outlet pipe has a first side wall and a second side wall that are arranged opposite to each other, the first side wall is located above the second side wall, and the projection of the edge of the first side wall on the light receiving surface is flush with the bottom edge of the photovoltaic panel.

3. The photovoltaic self-cleaning device according to claim 2, characterized in that: The air inlet duct has a third side wall and a bottom wall which are arranged opposite to each other. The third side wall is located above the bottom wall. The third side wall is arranged parallel to the photovoltaic panel. The air inlet is arranged on the backlight side of the photovoltaic panel.

4. The photovoltaic self-cleaning device according to claim 3, characterized in that: The distance between the second side wall and the photovoltaic panel is greater than or equal to a first threshold; And / or, the distance between the third side wall and the photovoltaic panel is greater than or equal to a second threshold.

5. The photovoltaic self-cleaning device according to claim 3, characterized in that: The bottom wall has a first end and a second end that are oppositely disposed, the first end is located at the air inlet, and the second end of the bottom wall is higher than the first end of the bottom wall in the vertical direction of the photovoltaic panel.

6. The photovoltaic self-cleaning device according to claim 3, characterized in that: The photovoltaic self-cleaning device also includes a fixing seat, which is installed on the ground and connected to the bottom wall.

7. The photovoltaic self-cleaning device according to claim 6, characterized in that: The fixing seat includes a plurality of limit blocks, parts of the limit blocks are buried underground, and the plurality of limit blocks are correspondingly arranged around the purge assembly.

8. The photovoltaic self-cleaning device according to claim 1, characterized in that: The purge assembly further includes a flow guide pipe, which is connected between the air inlet pipe and the air outlet pipe, and the flow guide pipe is configured to be U-shaped.

9. The photovoltaic self-cleaning device according to claim 8, characterized in that: An organ pipe is arranged between the air inlet pipe and the flow guide pipe.

10. The photovoltaic self-cleaning device according to any one of claims 1 to 9, characterized in that: The air outlet pipe and the air inlet pipe are both made of hard, corrosion-resistant, lightweight plastic; And / or, the width of the air outlet is consistent with the width of the photovoltaic panel.

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