Protection assembly, self-cleaning photovoltaic device and photovoltaic power generation system

Abstract

The utility model relates to a protection assembly, a self-cleaning photovoltaic device and a photovoltaic power generation system. The protection assembly comprises a first frame, a first reel, a second reel, a transparent film and a first driving piece, the first frame is used for being arranged on the photovoltaic panel, the first reel and the second reel are arranged at the two ends of the first frame respectively, the transparent film comprises a protection part and a connection part, the protection part is opposite to the photovoltaic panel in the third direction, and the connection part is connected with the first frame. The connecting part is connected to the first reel and the second reel, the length of the connecting part is larger than that of the protection part, and the first driving piece is in transmission connection with the first reel. According to the protection assembly, the photovoltaic panel is protected through the transparent film, the photovoltaic panel is prevented from being polluted, the clean transparent film is wound through the second winding shaft to form a standby part of the protection part, the transparent film is movable, replacement of the protection part can be achieved, namely, automatic cleaning of the transparent film above the photovoltaic panel is achieved, and the photovoltaic panel is prevented from being damaged. And normal light receiving and light energy conversion efficiency of the photovoltaic panel are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panel cleaning, in particular to a protective component, a self-cleaning photovoltaic device and a photovoltaic power generation system. Background Art

[0002] Photovoltaic panels are the fundamental power generation units of photovoltaic power plants. Contamination can reduce their efficiency by 10%-20%. Therefore, maintaining panel cleanliness is crucial for increasing their output. Conventional methods for cleaning photovoltaic panels use high amounts of water and are often only effective at removing surface dust, with limited effectiveness against stubborn stains like organic contamination and bird droppings. Utility Model Content

[0003] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a protective assembly that protects photovoltaic panels with a transparent film to prevent contamination. A second reel winds a clean transparent film to form a spare portion of the protective assembly. The removable transparent film allows replacement of the protective assembly, effectively achieving automatic cleaning of the transparent film above the photovoltaic panel, ensuring normal light reception and light energy conversion efficiency of the photovoltaic panel.

[0004] An embodiment of the present invention provides a self-cleaning photovoltaic device.

[0005] An embodiment of the present invention provides a photovoltaic power generation system.

[0006] The protective assembly of an embodiment of the utility model includes a first frame, a first scroll, a second scroll, a transparent film and a first driving member, the first frame extends along a first direction, the first frame is used to be arranged at the end of the photovoltaic panel in the second direction and connected to the photovoltaic panel, the second direction is perpendicular to the first direction; the first scroll is rotatably arranged at one end of the first frame in the first direction, and the second scroll is rotatably arranged at the other end of the first frame in the first direction; the transparent film includes a protective part distributed in its extension direction and a connecting part located on both sides of the protective part, the protective part is opposite to the photovoltaic panel in a third direction, the third direction is orthogonal to the first direction and the second direction, the connecting parts on both sides are respectively connected to the first scroll and the second scroll, the connecting part on the first scroll and / or the second scroll is wound multiple times, and the length of the connecting part is greater than the length of the protective part; the first driving member is arranged at one end of the first frame, and the first driving member is transmission-connected to the first scroll.

[0007] The protective assembly of the present invention protects the photovoltaic panel through a transparent film, preventing the photovoltaic panel from being contaminated. A clean transparent film is wound around the second reel to form a spare portion of the protective part. When the protective part is contaminated, the first driving member drives the first reel to rotate, causing the clean transparent film in the spare portion to move to the top of the photovoltaic panel to form a new protective part, thereby replacing the protective part. This is equivalent to automatically cleaning the transparent film (i.e., the protective part) above the photovoltaic panel, thereby ensuring the cleanliness of the transparent film above the photovoltaic panel and the normal light energy conversion efficiency of the photovoltaic panel. In addition, the method for replacing the transparent film above the photovoltaic panel is simple, efficient, and low-cost.

[0008] In some embodiments, the first frame is provided with a receiving cavity, and the receiving cavity extends along the first direction; the protective component further includes a ball, and the plurality of balls are arranged in the receiving cavity at intervals along the first direction, and the balls abut against the transparent film.

[0009] In some embodiments, the first frame is provided with a limiting groove in the accommodating cavity, and the limiting grooves are multiple, and the multiple balls correspond to the multiple limiting grooves one by one and are installed in the limiting grooves;

[0010] And / or, the ball is spherical;

[0011] And / or, the protective component further includes a gasket, which is provided at the end of the transparent film in the second direction, and the gasket abuts against the ball.

[0012] In some embodiments, the protective component further includes a cleaning piece, which includes a second frame, a main water pipe and a drainage channel, the second frame extends along the second direction, the second frame is arranged on the first frame, the second frame is separated from the transparent film, the main water pipe is arranged on the second frame, and the drainage channel has an inlet and an outlet, the inlet is connected to the main water pipe, and the outlet faces the transparent film.

[0013] In some embodiments, the protection assembly further includes a second driving member, which is disposed at the other end of the first frame and is drivingly connected to the second reel.

[0014] In some embodiments, the number of the cleaning members is two, and the two cleaning members are respectively arranged at two ends of the first frame in the first direction.

[0015] In some embodiments, the first driving member is a first driving motor or a hand crank; and / or, the transparent film includes a film layer and a hydrophobic layer, and in the thickness direction of the photovoltaic panel, the hydrophobic layer is located on the side of the transparent film away from the photovoltaic panel.

[0016] The self-cleaning photovoltaic device of the embodiment of the present invention includes a photovoltaic panel and a protective component, wherein the protective component is the protective component described in any embodiment, and the first frame of the protective component is arranged at the end of the photovoltaic panel in the second direction and is connected to the photovoltaic panel.

[0017] A photovoltaic power generation system according to an embodiment of the present utility model includes the self-cleaning photovoltaic device.

[0018] In some embodiments, there are multiple self-cleaning photovoltaic devices, and the multiple self-cleaning photovoltaic devices are arranged along the first direction to form a photovoltaic group. The photovoltaic group has a driving part and a driven part. The self-cleaning photovoltaic device where the first driving member located on the outside of the photovoltaic group is located forms the driving part of the photovoltaic group. The first driving member of the self-cleaning photovoltaic device located in the driven part is a connecting rod, which connects the first reels of adjacent self-cleaning photovoltaic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the protective assembly of an embodiment of the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of a self-cleaning photovoltaic device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the first frame, the third frame, the photovoltaic panel and the transparent film of an embodiment of the present utility model;

[0022] Figure 4 It is a schematic cross-sectional structural diagram of the cleaning element according to an embodiment of the present utility model.

[0023] Reference numerals:

[0024] Protection assembly 100;

[0025] First frame 1, accommodating cavity 11, fixing ring 12;

[0026] First Reel 2;

[0027] Transparent film 3, protective portion 31, connecting portion 32;

[0028] First driving member 4, ball 5, gasket 6;

[0029] Cleaning member 7, second frame 71, first connecting plate 711, second connecting plate 712, fixing buckle 713, main water pipe 72, drainage channel 73,

[0030] Second scroll 8;

[0031] Photovoltaic panel 200 , third frame 300 , self-cleaning photovoltaic device 1000 . DETAILED DESCRIPTION

[0032] 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 should not be understood as limiting the present invention.

[0033] Please refer to the attached Figures 1 to 4 , the protective assembly 100, the self-cleaning photovoltaic device 1000 and the photovoltaic power generation system of the embodiment of the present invention are described in detail.

[0034] The self-cleaning photovoltaic device 1000 according to the embodiment of the present invention includes a photovoltaic panel 200 and a protective assembly 100 .

[0035] The protection assembly 100 includes a first frame 1, a first reel 2, a second reel 8, a transparent film 3 and a first driving member 4. The first frame 1 is arranged along a first direction (eg Figure 1 The first frame 1 is provided on the photovoltaic panel 200 in the second direction (eg Figure 2 The first reel 2 is rotatably mounted on one end of the first frame 1 in the first direction, and the second reel 8 is rotatably mounted on the other end of the first frame 1 in the first direction. The transparent film 3 includes a protective portion 31 distributed in the extending direction thereof and connecting portions 32 located on both sides of the protective portion 31. The protective portion 31 is disposed in a third direction (e.g., Figure 2 The first frame 1 is provided with a first drive member 4 disposed at this end thereof and is in driving connection with the first reel 2.

[0036] When installing the self-cleaning photovoltaic device 1000 of an embodiment of the present invention, the length of the connecting portion 32 wound on the first reel 2 and / or the second reel 8 is greater than the length of the protective portion 31. For example, the first reel 2 is connected to the transparent film 3, the transparent film 3 wound on the first reel 2 is less than one circle, and the length of the transparent film 3 wound on the second reel 8 is three times the length of the protective portion 31.

[0037] The following describes the use process of the self-cleaning photovoltaic device 1000 of the embodiment of the present invention, assuming that the length of the transparent film 3 wound on the first reel 2 is half a circle and the length of the transparent film 3 wound on the second reel 8 is three times the length of the protective part 31 as the initial state.

[0038] In the operating environment, the third direction is the same as the up-down direction, and the protective portion 31 of the transparent film 3 is located on the upper side of the photovoltaic panel 200. The transparent film 3 is transparent and does not affect the light irradiation on the photovoltaic panel 200, thereby ensuring the normal light energy conversion operation of the photovoltaic panel 200. The protective portion 31 of the transparent film 3 can provide a protective effect for the photovoltaic panel 200, preventing stains and impurities such as floating sediment, oily dust, and bird droppings from falling on the surface of the photovoltaic panel 200, maintaining the cleanliness of the photovoltaic panel 200, thereby avoiding direct cleaning of the photovoltaic panel 200 and further avoiding scratching the photovoltaic panel 200 during the cleaning process. When it rains in the environment, rainwater can wash the surface of the protective portion 31, washing away stains and impurities on the surface of the protective portion 31, reducing the degree of contamination of the protective portion 31, and extending the service life of the protective portion 31. When the contamination level of the protective portion 31 reaches a set value, the first drive member 4 rotates the first reel 2, causing the first reel 2 to wind the transparent film 3, winding the contaminated protective portion 31 onto the first reel 2. Simultaneously, the clean transparent film 3 on the second reel 8 is unwound and moved to the upper side of the photovoltaic panel 200, forming a new, clean protective portion 31. This ensures the light transmittance of the transparent film 3 and the normal light energy conversion efficiency of the photovoltaic panel 200. When the clean transparent film 3 is used up, it is removed from the first reel 2 and the second reel 8 and replaced with a new one. The used transparent film 3 is cleaned and can be reused once it reaches the set cleanliness level.

[0039] The self-cleaning photovoltaic device 1000 of the present invention protects the photovoltaic panel 200 with a transparent film 3 to prevent contamination of the photovoltaic panel 200. A second reel 8 winds a clean transparent film 3 to form a spare portion of the protective portion 31. When the protective portion 31 becomes contaminated, the first drive member rotates the first reel 2 to move the spare portion of the clean transparent film 3 to the top of the photovoltaic panel 200 to form a new protective portion 31, thereby replacing the protective portion 31. This automatically cleans the transparent film 3 (i.e., the protective portion 31) above the photovoltaic panel 200, thereby ensuring the cleanliness of the transparent film 3 above the photovoltaic panel 200 and the normal light energy conversion efficiency of the photovoltaic panel 200. Furthermore, the replacement method of the transparent film 3 above the photovoltaic panel 200 is simple, efficient, and low-cost.

[0040] In order to make the solution of this application easier to understand, the first direction is the same as the front-back direction, the second direction is the same as the left-right direction, and the third direction is the same as the up-down direction. Figure 1 、 2 and Figure 3 As shown, the left and right directions are as follows Figure 1 and Figure 3 As shown, the up and down directions are as Figures 1 to 4 shown.

[0041] The self-cleaning photovoltaic device 1000 according to the embodiment of the present invention includes a photovoltaic panel 200 , a third frame 300 and a protective assembly 100 .

[0042] The third frame 300 extends along the first direction, and the third frame 300 is distributed at the end of the photovoltaic panel 200 in the second direction. The upper side of the third frame 300 is connected to the photovoltaic panel 200, and the lower side of the third frame 300 is installed on the ground or on an installation platform. The third frame 300 is a frame supporting the photovoltaic panel 200.

[0043] The protection assembly 100 includes a first frame 1 , a first reel 2 , a second reel 8 , a transparent film 3 and a first driving member 4 .

[0044] The first frame 1 extends along the first direction, is disposed at the end of the photovoltaic panel 200 in the second direction, and is connected to the photovoltaic panel 200 via the third frame 300. The first frame 1 is located above the photovoltaic panel 200. In other words, the first frame 1 is connected to the third frame 300.

[0045] In some embodiments, the first frame 1 and the third frame 300 are integrally formed.

[0046] The first frame 1 is provided with a fixing ring 12 at both ends in the first direction, and the fixing ring 12 is connected to the third frame 300. The first reel 2 is rotatably mounted on the fixing ring at one end (front end) of the first frame 1 in the first direction, and the second reel 8 is rotatably mounted on the fixing ring at the other end (rear end) of the first frame 1 in the first direction. The two ends of the transparent film 3 are respectively connected to the first reel 2 and the second reel 8. The transparent film 3 includes a protective portion 31 distributed in the direction of its extension and a connecting portion 32 located on both sides of the protective portion 31. The protective portion 31 is opposite to the photovoltaic panel 200 in the third direction. The connecting portion 32 on the first reel 2 and / or the second reel 8 is wound multiple times, and the length of the connecting portion 32 is greater than the length of the protective portion 31.

[0047] Specifically, in the first direction, the first scroll 2 and the second scroll 8 are respectively located at the two ends of the photovoltaic panel 200 and are separated from the photovoltaic panel 200. In the third direction, the first scroll 2 and the second scroll 8 are both located on the side of the photovoltaic panel 200 away from the protective portion 31, that is, the first scroll 2 and the second scroll 8 are both located on the lower side of the photovoltaic panel 200, so that the transparent film 3 connected to the first scroll 2 and the second scroll 8 can cover the entire photovoltaic panel 200, thereby increasing the protective effect on the photovoltaic panel 200.

[0048] The transparent film 3 includes a film layer and a hydrophobic layer. In the thickness direction of the photovoltaic panel 200, the hydrophobic layer is located on the side of the transparent film 3 away from the photovoltaic panel 200. Figure 2As shown, when the self-cleaning photovoltaic device 1000 of the present embodiment is in use, the hydrophobic layer is located on the upper side of the transparent film 3. The hydrophobic layer imparts hydrophobic properties to the transparent film 3, thereby increasing the fluidity of water on the surface of the transparent film 3 and reducing adhesion of the transparent film 3. This improves the cleanliness of the transparent film 3, increases the lifespan of the transparent film 3, and reduces the frequency of replacement and cleaning of the transparent film 3, thereby reducing the maintenance cost of the transparent film 3 and contributing to lowering the cost of use of the self-cleaning photovoltaic device 1000.

[0049] The first driving member 4 is provided at the one end of the first frame 1 , and the first driving member 4 is drivingly connected to the first reel 2 .

[0050] In some embodiments, the first driving member 4 is a first driving motor, which is disposed on the first frame 1 , and the output shaft of the first driving motor is drivingly connected to the first reel 2 , and the first driving motor drives the first reel 2 to rotate.

[0051] In other embodiments, the first driving member 4 is a hand crank (not shown), which is cranked by a person to rotate the first reel 2. The use of a hand crank as the first driving member 4 can reduce the manufacturing cost of the self-cleaning photovoltaic device 1000 of the present invention and reduce the power consumption of the self-cleaning photovoltaic device 1000.

[0052] In some embodiments, the first frame 1 is provided with a receiving cavity 11 extending along a first direction. The protective assembly 100 further includes a plurality of balls 5, which are spaced apart within the receiving cavity 11 along the first direction and abut against the transparent film 3. As the transparent film 3 moves, the balls 5 roll in contact with the transparent film 3. The balls 5 not only provide support for the transparent film 3, ensuring its tension and smoothness, but also reduce friction during movement, preventing friction between the transparent film 3 and the first frame 1 and thereby preventing wear on the transparent film 3.

[0053] In some embodiments, the first frame 1 is provided with a limiting groove (not shown) within the accommodating cavity 11. The limiting groove is located on the lower side of the accommodating cavity 11. There are multiple limiting grooves, and the multiple balls 5 correspond to the multiple limiting grooves and are installed in the limiting grooves. This prevents the balls 5 from sliding back and forth within the accommodating cavity 11, ensures that the balls 5 are evenly distributed, and thus ensures that the balls 5 support the transparent film 3.

[0054] In some embodiments, the ball 5 is spherical. The contact area between the spherical ball 5 and the transparent film 3 is small, which is beneficial to further reduce the friction and wear of the transparent film 3.

[0055] In some embodiments, the protective assembly 100 further includes a gasket 6, which is provided at the end of the transparent film 3 in the second direction, and the gasket 6 abuts the ball 5. The gasket 6 is provided at the end of the transparent film 3 in the second direction, and extends along the length of the transparent film 3. The gasket 6 can enhance the strength of the end of the transparent film 3 in the second direction, and rely on the contact between the gasket 6 and the ball 5 to enhance the support effect of the ball 5 on the transparent film 3, thereby improving the flatness of the transparent film 3.

[0056] In some embodiments, the self-cleaning photovoltaic device 1000 further includes a cleaning member 7, which includes a second frame 71, a main water pipe 72, and a drainage channel 73. The second frame 71 extends along the second direction and is disposed on the first frame 1, spaced apart from the transparent film 3. The main water pipe 72 is disposed on the second frame 71. The drainage channel 73 has an inlet and an outlet, the inlet communicating with the main water pipe 72 and the outlet facing the transparent film 3. There are multiple drainage channels 73, each of which is spaced apart along the second direction. The main water pipe 72 is connected to the water supply system. When the protective portion 31 of the transparent film 3 becomes contaminated, the water supply system is activated, and water flows from the water supply system to the main water pipe 72 before being discharged from the outlet. Simultaneously, the first drive member 4 is activated, and the first drive member 4 drives the transparent film 3 via the first reel 2, gradually moving the contaminated protective portion 31 toward the cleaning member 7. The water discharged from the outlet flushes the contaminated protective portion 31, thereby cleaning the contaminated protective portion 31. The cleaned protective portion 31 is then wound onto the first reel 2. During use, the self-cleaning photovoltaic device 1000 flushes and cleans the contaminated transparent film 3, thereby reducing the difficulty and frequency of rinsing during reuse of the transparent film 3 and increasing the reuse rate of the transparent film 3, particularly in environments with low rainfall.

[0057] In some embodiments, the second frame 71 includes a first connecting plate 711, a second connecting plate 712 and a fixing buckle 713. The first connecting plate 711 is connected to the first frame 1. The first connecting plate 711 is provided with a fixing buckle 713. The main water pipe 72 is fixed in the fixing buckle 713. The second connecting plate 712 is provided at the end of the first connecting plate 711. Figure 2 and Figure 4As shown, the second connecting plate 712 is located above the main water pipe 72. The second connecting plate 712 extends in the first direction toward the protective portion 31. A portion of the second connecting plate 712 corresponds to the protective portion 31 in the third direction. The first connecting plate 711 and the second connecting plate 712 are provided with a connecting channel to form the drainage channel 73. The channel is opened on the second frame 71 to form the drainage channel 73. Relying on the strength of the second frame 71, it can ensure that the outlet of the drainage channel 73 is directed toward the protective portion 31, thereby flushing the protective portion 31 with drainage water, and the safety and strength of the drainage channel 73 are guaranteed. This prevents damage to the drainage channel 73 caused by environmental factors such as strong winds in the use environment of the self-cleaning photovoltaic device 1000 according to the embodiment of the present invention, thereby improving the reliability of the self-cleaning photovoltaic device 1000 according to the embodiment of the present invention.

[0058] In some embodiments, the self-cleaning photovoltaic device 1000 further includes a second driving member (not shown in the figure), which is provided at the other end of the first frame 1 and is in transmission connection with the second reel 8. When the transparent film 3 on the second reel 8 is wound less than one circle, it means that most of the transparent film 3 is wound on the first reel 2 and the spare transparent film 3 on the second reel 8 has been used up, that is, the transparent film 3 washed by the cleaning member 7 is wound on the first reel 2. At this time, the second driving member is turned on and the second driving member drives the second reel 8 to rotate, so that the second reel 8 winds the transparent film 3, so that the transparent film 3 can be moved as a whole from the first reel 2 to the second reel 8, so that the clean transparent film 3 on the first reel 2 moves to the top of the photovoltaic panel 200 to form a new protective portion 31, so that the transparent film 3 can be reused without disassembling the transparent film 3, thereby further reducing the replacement frequency of the transparent film 3 and further increasing the service life of the transparent film 3, which is conducive to reducing the use cost of the self-cleaning photovoltaic device 1000.

[0059] In some embodiments, the second driving member is a second driving motor, which is disposed on the first frame 1 , and the output shaft of the second driving motor is transmission-connected to the second reel 8 , and the second driving motor drives the second reel 8 to rotate.

[0060] In some other embodiments, the second driving member is a hand crank (not shown in the figures).

[0061] In some embodiments, there are two cleaning members 7, which are respectively arranged at the two ends of the first frame 1 in the first direction. Then, the cleaning member 7 arranged at the one end of the first frame 1 can flush and clean the transparent film 3 adjacent to the first reel, and at the same time cooperate with the first driving member 4 to drive the first reel 2 to wind the transparent film 3, that is, it can flush and clean the contaminated protective portion 31, and at the same time complete the winding and storage of the cleaned transparent film and the replacement of the protective portion 31. When the spare transparent film on the second reel 8 is used up, the second driving member drives the second reel 8 to rotate, so that the transparent film 3 moves to the second reel 8 for winding. At the same time, the cleaning member 7 arranged at the other end of the first frame 1 can flush and clean the transparent film 3 adjacent to the second reel 8, achieve flushing and cleaning of the contaminated protective portion 31, and at the same time complete the winding and storage of the cleaned transparent film and the replacement of the protective portion 31.

[0062] The self-cleaning photovoltaic device 1000 of the embodiment of the present invention is provided with cleaning parts 7 at both ends of the first frame 1, which can increase the number of reuses of the transparent film 3 and reduce the frequency of disassembly and replacement of the transparent film 3, which is conducive to reducing the use cost of the self-cleaning photovoltaic device 1000.

[0063] The photovoltaic power generation system according to an embodiment of the present invention is described below.

[0064] The photovoltaic power generation system according to the embodiment of the present invention includes a self-cleaning photovoltaic device 1000 .

[0065] Therefore, the photovoltaic power generation system of the embodiment of the present invention can achieve self-cleaning of the transparent film 3, ensure the cleanliness of the photovoltaic panel 200, and ensure the normal light energy conversion efficiency of the photovoltaic panel 200.

[0066] In some embodiments, there are multiple self-cleaning photovoltaic devices 1000, and the multiple self-cleaning photovoltaic devices 1000 are arranged along a first direction to form a photovoltaic group. The photovoltaic group has a driving portion and a driven portion. The self-cleaning photovoltaic devices 1000 located on the outside of the photovoltaic group, where the first driving members 4 are located, form the driving portion of the photovoltaic group. The first driving members 4 of the self-cleaning photovoltaic devices 1000 located in the driven portion are first connecting rods, which connect the first reels 2 of adjacent self-cleaning photovoltaic devices 1000. In other words, for a group of photovoltaic groups, the first driving members 4 located on the outside serve as the driving member, and the first driving members 4 drive the corresponding first reels 2 to rotate, which in turn drives the first reels 2 of the self-cleaning photovoltaic devices 1000 in the driven portion to rotate via the first connecting rod.

[0067] Correspondingly, the second driving member of the self-cleaning photovoltaic device 1000 located in the driven portion is a second connecting rod, which connects the second reels 8 of adjacent self-cleaning photovoltaic devices 1000. For one photovoltaic group, the second driving member located on the outside serves as the driving member, driving the corresponding second reel 8 to rotate, which in turn drives the second reel 8 of the driven self-cleaning photovoltaic device 1000 to rotate via the second connecting rod.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships 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 should not be understood as a limitation to the present invention.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0072] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 expressions 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.

[0073] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A protective assembly (100), characterized in that: include: a first frame (1), the first frame (1) extending along a first direction, the first frame (1) being used to be arranged at an end of the photovoltaic panel (200) in a second direction and connected to the photovoltaic panel (200), the second direction being perpendicular to the first direction; a first reel (2) and a second reel (8), wherein the first reel (2) is rotatably disposed at one end of the first frame (1) in the first direction, and the second reel (8) is rotatably disposed at the other end of the first frame (1) in the first direction; A transparent film (3), the transparent film (3) comprising a protective portion (31) distributed in its extension direction and connecting portions (32) located on both sides of the protective portion (31), the protective portion (31) being opposite to the photovoltaic panel (200) in a third direction, the third direction being orthogonal to the first direction and the second direction, the connecting portions (32) on both sides being connected to the first reel (2) and the second reel (8), respectively, and the length of the connecting portion (32) being greater than the length of the protective portion (31); and A first driving member (4), the first driving member (4) is arranged at one end of the first frame (1), and the first driving member (4) is transmission-connected to the first reel (2).

2. The protection assembly (100) according to claim 1, characterized in that The first frame (1) is provided with a receiving cavity (11), and the receiving cavity (11) extends along the first direction; the protective component (100) further comprises a ball (5), and the ball (5) is provided in plurality, and the plurality of balls (5) are arranged in the receiving cavity (11) at intervals along the first direction, and the balls (5) abut against the transparent film (3).

3. The protection assembly (100) according to claim 2, characterized in that The first frame (1) is provided with a limiting groove in the accommodating cavity (11), and there are a plurality of limiting grooves. The plurality of balls (5) correspond to the plurality of limiting grooves one by one and are installed in the limiting grooves. And / or, the ball (5) is spherical; And / or, the protective component (100) further comprises a gasket (6), the gasket (6) being provided at the end of the transparent film (3) in the second direction, the gasket (6) being in contact with the ball (5).

4. The protection assembly (100) according to claim 1, characterized in that The invention further comprises a cleaning member (7), the cleaning member (7) comprising a second frame (71), a main water pipe (72) and a drainage channel (73), the second frame (71) extending along the second direction, the second frame (71) being arranged on the first frame (1), the second frame (71) being spaced apart from the transparent film (3), the main water pipe (72) being arranged on the second frame (71), the drainage channel (73) having an inlet and an outlet, the inlet being communicated with the main water pipe (72), and the outlet being directed toward the transparent film (3).

5. The protection assembly (100) according to claim 4, characterized in that It further comprises a second driving member, which is arranged at the other end of the first frame (1), and the second driving member is in driving connection with the second reel (8).

6. The protection assembly (100) according to claim 5, characterized in that The number of the cleaning members (7) is two, and the two cleaning members (7) are respectively arranged at two ends of the first frame (1) in the first direction.

7. The protection assembly (100) according to claim 1, characterized in that The first driving member (4) is a first driving motor or a hand crank; And / or, the transparent film (3) comprises a film layer and a hydrophobic layer, and in the thickness direction of the photovoltaic panel (200), the hydrophobic layer is located on the side of the transparent film (3) facing away from the photovoltaic panel (200).

8. A self-cleaning photovoltaic device (1000), characterized in that: include: Photovoltaic panels (200); and A protective assembly (100), wherein the protective assembly (100) is the protective assembly (100) according to any one of claims 1 to 7, and the first frame (1) of the protective assembly (100) is provided at the end of the photovoltaic panel (200) in the second direction and is connected to the photovoltaic panel (200).

9. A photovoltaic power generation system, characterized in that: Comprising the self-cleaning photovoltaic device (1000) as claimed in claim 8.

10. The photovoltaic power generation system according to claim 9, characterized in that: The self-cleaning photovoltaic device (1000) has a plurality of self-cleaning photovoltaic devices (1000), and the plurality of self-cleaning photovoltaic devices (1000) are arranged along the first direction to form a photovoltaic group, the photovoltaic group having a driving part and a driven part, the self-cleaning photovoltaic device (1000) where the first driving member (4) located outside the photovoltaic group is located forms the driving part of the photovoltaic group, and the first driving member (4) of the self-cleaning photovoltaic device (1000) located in the driven part is a connecting rod, and the connecting rod connects the first reels (2) of adjacent self-cleaning photovoltaic devices (1000).

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