Automatic cleaning device for photovoltaic string

Abstract

The invention relates to the technical field of photovoltaic panel cleaning, in particular to a photovoltaic string automatic cleaning device which comprises a driving assembly, a photovoltaic panel, a storage battery arranged on the side wall of the photovoltaic panel and used for converting solar energy into electric energy to be stored and a photovoltaic support arranged at the bottom end of the photovoltaic panel. The bottom end of the photovoltaic support is provided with a telescopic rotary actuator used for driving the cleaning device to clean the photovoltaic panel, and the end of the telescopic rotary actuator is provided with a linkage piece used for adjusting the angle of the cleaning device. The adjusting assembly comprises a supporting rod arranged at the output end of the telescopic rotary actuator, the end, away from the telescopic rotary actuator, of the supporting rod is connected with a cleaning piece through a buckle, the cleaning piece is used for cleaning the photovoltaic panel, and the photovoltaic panel can be cleaned through accurate control of the telescopic rotary actuator and a linkage piece. The angle and the cleaning strength of the scraper can be automatically adjusted according to different properties of stains on the photovoltaic panel, and the cleaning efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic panel cleaning, and in particular to an automatic photovoltaic string cleaning device. Background Art

[0002] With the development of renewable energy technology, solar photovoltaic power generation systems have attracted widespread attention due to their environmental protection and sustainability. As the core component of photovoltaic power generation systems, photovoltaic panels are exposed to the outdoor environment for a long time and are prone to accumulate various types of stains, such as dust, leaves, bird droppings, etc. These stains will block sunlight, reduce the photovoltaic panel's photoelectric conversion efficiency, and thus affect the power generation performance of the entire system.

[0003] Currently, photovoltaic panel cleaning devices on the market mainly use fixed scrapers or water spraying to clean. Among them, fixed scrapers usually do not have the function of adjusting according to the type of stains due to their simple structural design. This means that when facing more stubborn stains (such as dry bird droppings), a single cleaning is often difficult to completely remove, and repeated cleaning is required to achieve a better cleaning effect. In addition, the scraper angle of this type of device is usually fixed and cannot be flexibly adjusted according to the specific conditions of the photovoltaic panel surface (such as tilt angle, stain distribution, etc.), which further limits its cleaning efficiency and effect.

[0004] For example, when thick or hard stains appear on the photovoltaic panel, if the angle of the scraper is not suitable, it may cause serious wear of the scraper or even scratch the surface of the photovoltaic panel. At the same time, for some special-shaped stains, if the scraper cannot adjust the angle according to the actual situation, it may not be able to be effectively cleaned, thereby reducing the overall efficiency of the cleaning work. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problem that the above-mentioned scraper cannot adjust the angle according to the actual situation and may not be able to clean effectively, thereby reducing the overall efficiency of the cleaning work, the present invention is proposed.

[0007] Therefore, an object of the present invention is to provide an automatic cleaning device for photovoltaic strings.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic cleaning device for photovoltaic strings, comprising a driving assembly, including a photovoltaic panel, a storage battery arranged on the side wall of the photovoltaic panel for converting solar energy into electrical energy for storage, and a photovoltaic bracket arranged at the bottom end of the photovoltaic panel, a telescopic rotary actuator for driving a cleaning device to clean the photovoltaic panel is installed at the bottom end of the photovoltaic bracket, a linkage for adjusting the angle of the cleaning device is installed at the end of the telescopic rotary actuator, and a PLC controller is installed on the side wall of the telescopic rotary actuator;

[0009] The adjustment component comprises a support rod arranged at the output end of the telescopic rotary actuator, wherein one end of the support rod away from the telescopic rotary actuator is connected to a cleaning member through a buckle, and the cleaning member is used to clean the photovoltaic panel.

[0010] As a preferred solution of the automatic cleaning device of photovoltaic strings described in the present invention, the linkage member includes an insert block arranged at the output end of the telescopic rotary actuator, and an insert rod connected to the support rod is installed at one end of the insert block away from the telescopic rotary actuator, the insert block matches the first connecting rod, and the first connecting rod is rotatably connected to the support rod.

[0011] As a preferred solution of the automatic cleaning device for photovoltaic strings described in the present invention, the linkage member further includes a second connecting rod arranged at the end of the first connecting rod, a third connecting rod is installed at the end of the second connecting rod away from the first connecting rod, and the third connecting rod is connected to the buckle.

[0012] As a preferred solution of the automatic cleaning device for photovoltaic strings of the present invention, the cleaning component includes a fixing plate arranged at the end of the buckle, the side view of the fixing plate is an inverted U-shape, and an extension rod is hingedly installed at the end of the fixing plate.

[0013] As a preferred solution of the automatic cleaning device of photovoltaic strings described in the present invention, the cleaning component also includes a rack plate arranged on the inner wall of the fixed plate, a buffer plate is installed at one end of the extension rod close to the fixed plate, and the ends of the buffer plate and the extension rod are provided with a card plate with a convex shape in a side view.

[0014] As a preferred solution of the automatic cleaning device for photovoltaic strings of the present invention, the cleaning component further comprises a spring sheet arranged inside the rack plate, the front view of the spring sheet is arranged in a "X" shape, and the protrusions at both ends of the spring sheet are provided with ratchets to match the rack plate.

[0015] As a preferred solution of the automatic cleaning device for photovoltaic strings described in the present invention, the cleaning component further comprises a slide groove arranged on the inner wall of the spring sheet, a slide rod is installed inside the slide groove, a connecting rod is installed on the side wall of the slide rod, the connecting rod is connected to the oblique rod, and the oblique rod is symmetrically arranged with respect to the central axis of the spring sheet.

[0016] As a preferred solution of the photovoltaic string automatic cleaning device of the present invention, the cleaning member further comprises a convex rod arranged between the two oblique rods, and both ends of the convex rod extend through the fixing plate to the outside and connect with the knob.

[0017] As a preferred solution of the automatic cleaning device for photovoltaic strings described in the present invention, the cleaning component further includes a connecting plate arranged inside the card plate, the connecting plate is modularly arranged, and a scraper is installed at the bottom end of the connecting plate, the side view of the scraper is generally cross-shaped, and the middle part is funnel-shaped.

[0018] As a preferred solution of the automatic cleaning device for photovoltaic strings of the present invention, the cleaning component further comprises an extension plate arranged between the plurality of connecting plates, the extension plate is inserted into the empty groove at the end of the connecting plate, and the two extension plates are connected by a telescopic rod.

[0019] Beneficial effects of the present invention: The present invention can automatically adjust the angle and cleaning force of the scraper according to the different properties of the stains on the photovoltaic panel through the precise control of the telescopic rotary actuator and the linkage, thereby significantly improving the cleaning efficiency. The cross-shaped design of the scraper can better cover the surface of the photovoltaic panel, and the funnel-shaped design in the middle part helps to guide the water flow and stains to the edge of the photovoltaic panel for easy removal. The modular connection plate design can be adjusted according to the different sizes and shapes of the photovoltaic panel, thereby enhancing the adaptability of the system. The coordinated use of the extension plate, telescopic rod and buffer plate provides additional buffering, so that the system can adjust the angle when encountering stains that are difficult to clean, thereby reducing damage to the photovoltaic panel and the scraper. The need for manual intervention is reduced through the automated cleaning process, and the maintenance cost is reduced. The design and material selection of the scraper reduce the wear rate of the scraper and extend the service life. Regular automatic cleaning can effectively remove stains on the surface of the photovoltaic panel and maintain a high light transmittance, thereby improving the power generation efficiency of the photovoltaic system. According to actual use, the position of the scraper can be easily adjusted to adapt to different photovoltaic panel layouts and environmental requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without any creative labor.

[0021] Figure 1 The figure is an overall schematic diagram of an automatic cleaning device for photovoltaic strings.

[0022] Figure 2 The present invention is a schematic diagram of the cleaning parts position structure of a photovoltaic string automatic cleaning device.

[0023] Figure 3 The present invention is a schematic diagram of the position structure of the linkage parts and cleaning parts of a photovoltaic string automatic cleaning device.

[0024] Figure 4 A schematic diagram of the position structure of the plug rod and plug block of a photovoltaic string automatic cleaning device

[0025] Figure 5 The present invention is a schematic diagram of the cleaning component structure of an automatic cleaning device for photovoltaic strings.

[0026] Figure 6 The figure is a schematic diagram of the disassembled structure of the cleaning parts of a photovoltaic string automatic cleaning device.

[0027] Figure 7 The present invention is a schematic diagram of the connection structure between a spring sheet and a buffer plate of an automatic cleaning device for photovoltaic strings.

[0028] Figure 8 for Figure 7 Enlarged view of point A in .

[0029] Fig. 9 The figure is a schematic diagram of the position structure of the spring sheet and the rack plate of a photovoltaic string automatic cleaning device.

[0030] Fig.10 The present invention is a schematic diagram of the connection structure between a scraper and a connecting plate of an automatic cleaning device for photovoltaic strings.

[0031] Reference numerals:

[0032] 100, drive assembly; 101, photovoltaic panel; 102, battery; 103, photovoltaic bracket; 104, telescopic rotary actuator; 105, linkage; 106, PLC controller;

[0033] 105a, plug block; 105b, plug rod; 105c, first connecting rod; 105d, second connecting rod; 105f, third connecting rod;

[0034] 200, adjustment component; 201, support rod; 202, buckle; 203, cleaning part;

[0035] 203a, fixed plate; 203b, extension rod; 203c, rack plate; 203d, buffer plate; 203e, card plate; 203f, spring sheet; 203g, ratchet; 203h, slide groove; 203i, slide rod; 203j, connecting rod; 203k, inclined rod; 203l, convex rod; 203m, knob; 203n, connecting plate; 203p, scraper; 203q, extension plate; 203r, empty slot; 203s, telescopic rod. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] Example 1, reference Figure 1 to Figure 4 , which is the first embodiment of the present invention, provides an automatic cleaning device for photovoltaic strings, including, through the precise control of the linkage 105 and the power drive of the telescopic rotary actuator 104, automatic cleaning of the photovoltaic panel 101 under rainy conditions is realized, the cleaning efficiency and the power generation performance of the photovoltaic system are improved, wherein A is the initial position of the scraper 203p.

[0041] Specifically, the driving assembly 100 includes a photovoltaic panel 101, a battery 102 arranged on the side wall of the photovoltaic panel 101 for converting solar energy into electrical energy for storage, and a photovoltaic bracket 103 arranged at the bottom end of the photovoltaic panel 101. A telescopic rotary actuator 104 for driving a cleaning device to clean the photovoltaic panel 101 is installed at the bottom end of the photovoltaic bracket 103, a linkage part 105 for adjusting the angle of the cleaning device is installed at the end of the telescopic rotary actuator 104, and a PLC controller 106 is installed on the side wall of the telescopic rotary actuator 104.

[0042] Furthermore, the linkage 105 includes an insert block 105a arranged at the output end of the telescopic rotary actuator 104, and an insert rod 105b connected to the support rod 201 is installed at one end of the insert block 105a away from the telescopic rotary actuator 104, the insert block 105a matches the first connecting rod 105c, and the first connecting rod 105c is rotatably connected to the support rod 201.

[0043] Furthermore, the linkage member 105 also includes a second link 105d disposed at the end of the first link 105c, and a third link 105f is installed at the end of the second link 105d away from the first link 105c, and the third link 105f is connected to the buckle 202.

[0044] Operation process: Under clear weather conditions, the photovoltaic panel 101 captures solar energy and converts it into electrical energy, which is stored in the battery 102. When it rains, the PLC controller 106 detects a rainy day signal. The PLC controller 106 starts the telescopic rotary actuator 104. The plug 105a is connected to the first connecting rod 105c, and when the telescopic rotary actuator 104 is actuated, the plug 105a moves accordingly. When the angle of the cleaning device needs to be adjusted, the plug 105b is disconnected from the support rod 201, and the telescopic rotary actuator 104 drives the plug 105a to rotate, thereby driving the first connecting rod 105c to rotate. The rotation of the first connecting rod 105c drives the second connecting rod 105d to swing, and the swing of the second connecting rod 105d further drives the third connecting rod 105f to move, thereby achieving the adjustment of the angle of the cleaning device. The third connecting rod 105f is connected to the cleaning device through the buckle 202, and the action of the telescopic rotary actuator 104 causes the scraper 203p to swing left and right, using rainwater for cleaning. Through the combined action of the connecting rods of the linkage member 105, the angle of the scraper 203p is changed to more effectively clean the surface of the photovoltaic panel. After the cleaning process is completed, the linkage member 105 returns to the initial position and waits for the next round of cleaning instructions.

[0045] Example 2, reference Figures 5 to 9, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the automatic cleaning function of the cleaning member 203 is realized through the control of the telescopic rotary actuator 104 and the linkage member 105. During the cleaning process, the angle of the scraper 203p is automatically adjusted through the cooperation of the spring sheet 203f, the ratchet 203g and the slide bar 203i, thereby improving the cleaning efficiency and the cleanliness of the photovoltaic panel 101.

[0046] Specifically, the adjustment assembly 200 includes a support rod 201 arranged at the output end of the telescopic rotary actuator 104 , and one end of the support rod 201 away from the telescopic rotary actuator 104 is connected to a cleaning member 203 through a buckle 202 , and the cleaning member 203 is used to clean the photovoltaic panel 101 .

[0047] Furthermore, the cleaning member 203 includes a fixing plate 203a disposed at the end of the buckle 202. The fixing plate 203a is in an inverted U-shape in a side view, and an extension rod 203b is hingedly mounted at the end of the fixing plate 203a.

[0048] Furthermore, the cleaning part 203 also includes a rack plate 203c arranged on the inner wall of the fixed plate 203a, and a buffer plate 203d is installed at one end of the extension rod 203b close to the fixed plate 203a. The ends of the buffer plate 203d and the extension rod 203b are provided with a card plate 203e with a convex shape in a side view.

[0049] Furthermore, the cleaning member 203 further includes a spring sheet 203f arranged inside the rack plate 203c. The front view of the spring sheet 203f is arranged in a "X" shape. Both ends of the spring sheet 203f are protruded with ratchet teeth 203g to match the rack plate 203c.

[0050] Furthermore, the cleaning part 203 also includes a slide groove 203h arranged on the inner wall of the spring sheet 203f, a slide rod 203i is installed inside the slide groove 203h, a connecting rod 203j is installed on the side wall of the slide rod 203i, the connecting rod 203j is connected to the inclined rod 203k, and the inclined rod 203k is symmetrically arranged with the central axis of the spring sheet 203f.

[0051] Furthermore, the cleaning member 203 further includes a protruding rod 2031 disposed between the two oblique rods 203k, and both ends of the protruding rod 2031 extend through the fixing plate 203a to the outside and are connected to the knob 203m.

[0052] The rest of the structure is the same as that of Example 1.

[0053] Operation process: On rainy days, the PLC controller 106 starts the telescopic rotary actuator 104 and adjusts the angle of the support rod 201 through the linkage 105. The support rod 201 moves, driving the cleaning member 203 to move through the buckle 202. The fixed plate 203a swings with the swing of the support rod 201, so that the cleaning member 203 cleans the surface of the photovoltaic panel 101. The extension rod 203b swings with the swing of the fixed plate 203a, and rainwater is used for cleaning. When the length of the scraper 203p needs to be adjusted according to the size of the photovoltaic panel 101, the extension rod 203b is pulled to move, and the extension rod 203b will drive the spring sheet 203f to move, and the moving spring sheet 203f will move on the inner wall of the rack plate 203c. When the extension rod 203b moves to a suitable position, the rotating knob 203m drives the convex rod 203l to rotate. The principle of the convex rod 203l is similar to that of a cam, so the convex rod 203l will squeeze the inclined rod 203k to open the spring sheet 203f, so that the spring sheet 203f drives the ratchet teeth 203g at both ends to engage and fix with the rack plate 203c, thereby fixing the extension rod 203b. Therefore, the extension rod 203b can be adjusted according to actual conditions.

[0054] Example 3, reference Figures 5 to 10 , which is the third embodiment of the present invention. This embodiment is different from the above embodiments in that the cross-shaped arrangement of the modular connecting plate 203n, the scraper 203p and the coordination of the telescopic rod 203s realize automatic adjustment of the angle of the scraper 203p and better cleaning effect, thereby improving the cleaning efficiency and the cleanliness of the photovoltaic panel.

[0055] Specifically, the cleaning part 203 also includes a connecting plate 203n arranged inside the card plate 203e. The connecting plate 203n is modularly arranged, and a scraper 203p is installed at the bottom end of the connecting plate 203n. The side view of the scraper 203p is generally cross-shaped, and the middle part is funnel-shaped.

[0056] Furthermore, the cleaning member 203 further includes an extension plate 203q disposed between the plurality of connecting plates 203n. The extension plate 203q is inserted into the empty groove 203r at the end of the connecting plate 203n, and the two extension plates 203q are connected by a telescopic rod 203s.

[0057] The rest of the structure is the same as that of Example 2.

[0058] Operation process: When the weather is fine, the photovoltaic panel 101 generates electricity and transmits electrical energy to the battery 102 (energy storage device). When it rains, the PLC controller 106 controls the telescopic rotary actuator 104 to start working, converting mechanical energy into kinetic energy, and transmitting the kinetic energy to the cleaning part 203 through the linkage 105. The connecting rod is an important component connecting the telescopic rotary actuator 104 and the scraper 203p. The connecting rod and the support rod 201 can convert the rotational motion generated by the telescopic rotary actuator 104 into linear motion, and drive the scraper 203p to swing left and right.

[0059] Next, let's take a look at how the automatic cleaning device for photovoltaic strings removes dust and dirt on the strings. The PLC controller 106 controls the telescopic rotary actuator 104 at the bottom of the photovoltaic panel 101 to start working, and the bottom motor transmits mechanical energy to the support rod 201. When the support rod 201 (bottom) swings to the left with the scraper 203p (bottom), the rubber scraper 203p (bottom) moves along the surface of the photovoltaic panel and removes dust and dirt on the photovoltaic panel with the help of rainwater. When the support rod 201 (bottom) swings to the right, the scraper 203p (bottom) will return to its original position and prepare for the next scraping action. After the bottom of the photovoltaic string completes a left and right back and forth action, it will temporarily stop. When the scraping angle of the scraper 203p needs to be changed, the telescopic rotary actuator 104 is started to drive the plug 105a to be inserted into the first connecting rod 105c, and at the same time, the plug 105b is disconnected from the support rod 201. At this time, the telescopic rotary actuator 104 drives the first connecting rod 195c to rotate and drives the second connecting rod 105d to swing. The swing of the second connecting rod 105d can drive the scraper 203p on the third connecting rod 105f to change its angle, so that the scraper 203p can be adjusted according to the actual situation, and the scraper 203p will encounter strong adhesion when scraping dust and impurities on the photovoltaic panel 101. When the stains are difficult to clean, the scraper 203p will encounter resistance and move upward during scraping, and the modular connecting plate 203n will be driven to move during the upward movement. Since the multiple connecting plates 203n are connected by the telescopic rod 203s, a buffer will be generated to reduce damage to the scraper 203p and the photovoltaic panel 101. At the same time, the information of the moving part of the connecting plate 203n is sent to the PLC controller 106. The PLC controller 106 controls the telescopic rotary actuator 104 to drive the scraper 203p to change the angle to focus on cleaning this part, thereby improving the cleaning efficiency. When the stains that are difficult to clean are large and the telescopic rod 203s cannot be adjusted, the buffer plate 203d is used to buffer and move upward. The buffer plate 203d is set in a seesaw form, so it can effectively improve the overall buffering efficiency.

[0060] In summary, the photovoltaic string automatic cleaning device works in coordination with the photovoltaic panel 101, the battery 102 (energy storage device), the telescopic rotary actuator 104, the inductive sensor on the modular connecting rod 203j, the PLC controller 106, the linkage 105, the cleaning part 203, and the blades, etc., to help the operation and maintenance personnel remove dust and dirt on the photovoltaic panel in rainy weather, thereby reducing the cost of photovoltaic string cleaning. Therefore, in daily use, the operation and maintenance personnel should pay attention to timely replacing the severely worn blades, and set appropriate time intervals according to the degree of cleanliness of the surface of different strings.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A photovoltaic string automatic cleaning device, characterized in that: include, A driving assembly (100) comprises a photovoltaic panel (101), a storage battery (102) arranged on a side wall of the photovoltaic panel (101) for converting solar energy into electrical energy for storage, and a photovoltaic bracket (103) arranged at the bottom end of the photovoltaic panel (101), a telescopic rotary actuator (104) for driving a cleaning device to clean the photovoltaic panel (101) being installed at the bottom end of the photovoltaic bracket (103), a linkage member (105) for adjusting the angle of the cleaning device being installed at the end of the telescopic rotary actuator (104), and a PLC controller (106) being installed on the side wall of the telescopic rotary actuator (104); The adjustment assembly (200) comprises a support rod (201) arranged at the output end of the telescopic rotary actuator (104), wherein one end of the support rod (201) away from the telescopic rotary actuator (104) is connected to a cleaning member (203) via a buckle (202), and the cleaning member (203) is used to clean the photovoltaic panel (101).

2. The photovoltaic string automatic cleaning device according to claim 1, characterized in that: The linkage member (105) comprises an insert block (105a) arranged at the output end of the telescopic rotary actuator (104); an insert rod (105b) connected to the support rod (201) is installed at one end of the insert block (105a) away from the telescopic rotary actuator (104); the insert block (105a) matches a first connecting rod (105c), and the first connecting rod (105c) is rotatably connected to the support rod (201).

3. The photovoltaic string automatic cleaning device according to claim 2, characterized in that: The linkage member (105) further comprises a second link (105d) arranged at the end of the first link (105c), a third link (105f) being installed at the end of the second link (105d) away from the first link (105c), and the third link (105f) is connected to the buckle (202).

4. The photovoltaic string automatic cleaning device according to claim 3, characterized in that: The cleaning component (203) comprises a fixing plate (203a) arranged at the end of the buckle (202); the fixing plate (203a) is arranged in an inverted U shape in a side view; and an extension rod (203b) is hingedly mounted on the end of the fixing plate (203a).

5. The photovoltaic string automatic cleaning device according to claim 4, characterized in that: The cleaning part (203) further comprises a rack plate (203c) arranged on the inner wall of the fixed plate (203a); a buffer plate (203d) is installed at one end of the extension rod (203b) close to the fixed plate (203a); and a card plate (203e) having a convex shape in a side view is arranged at the end of the buffer plate (203d) and the extension rod (203b).

6. The photovoltaic string automatic cleaning device according to claim 5, characterized in that: The cleaning element (203) further comprises a spring sheet (203f) arranged inside the rack plate (203c); the front view of the spring sheet (203f) is arranged in a "X" shape; protrusions at both ends of the spring sheet (203f) are provided with ratchet teeth (203g) matching the rack plate (203c).

7. The photovoltaic string automatic cleaning device according to claim 6, characterized in that: The cleaning part (203) further comprises a slide groove (203h) arranged on the inner wall of the spring sheet (203f), a slide rod (203i) is installed inside the slide groove (203h), a connecting rod (203j) is installed on the side wall of the slide rod (203i), the connecting rod (203j) is connected to the inclined rod (203k), and the inclined rod (203k) is symmetrically arranged with respect to the central axis of the spring sheet (203f).

8. The photovoltaic string automatic cleaning device according to claim 7, characterized in that: The cleaning member (203) further comprises a protruding rod (203l) arranged between the two oblique rods (203k), and both ends of the protruding rod (203l) pass through the fixing plate (203a) and extend to the outside to be connected to the knob (203m).

9. The photovoltaic string automatic cleaning device according to claim 8, characterized in that: The cleaning component (203) further comprises a connecting plate (203n) arranged inside the card plate (203e), the connecting plate (203n) being modularly arranged, and a scraper (203p) being installed at the bottom end of the connecting plate (203n), the scraper (203p) being arranged in a cross shape as a whole in a side view, and a middle portion being arranged in a funnel shape.

10. The photovoltaic string automatic cleaning device according to claim 9, characterized in that: The cleaning member (203) further comprises an extension plate (203q) arranged between the plurality of connecting plates (203n), the extension plate (203q) being inserted into the interior of the empty groove (203r) at the end of the connecting plate (203n), and two extension plates (203q) being connected via a telescopic rod (203s).

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