Photovoltaic module enhanced alloy assembly type cleaning device

Abstract

The invention relates to a photovoltaic module enhanced alloy assembly type cleaning device, which comprises a top cover and a buckle, the top cover is made of an aluminum alloy material, a hole is formed in the top cover, the buckle has creep resistance, and two main stiffening ribs, two secondary stiffening ribs and a central stiffening rib are arranged at the bottom of the top cover. The two main stiffening ribs, the two secondary stiffening ribs and the central stiffening rib are connected to form an M-shaped flow guide structure; the top cover is provided with two V-shaped inward-retracting parts, and the V-shaped inward-retracting parts are provided with a first anti-clogging hole and assembly hole and a second anti-clogging hole along the two sides of the stiffening rib correspondingly. The top cover and the buckle are integrally assembled through the newly-added opening, and the buckle is integrally in a V shape and is matched with the M-shaped flow guide structure to form a secondary confluence system. The device can realize the basic functions of effectively discharging sewage and reducing clogging on the surface of the photovoltaic module and keeping the surface of the photovoltaic module clean, and solves the problems that the surface is poor in corrosion resistance, clogging is easy to generate, falling is caused by device creep, and the drainage effect is not ideal.

Description

Technical Field

[0001] This invention relates to the field of solar photovoltaic module supporting equipment technology, and in particular to a photovoltaic module enhanced alloy assembled cleanroom device, which is especially suitable for installing photovoltaic modules with a small tilt angle in distributed photovoltaic power generation systems. It can achieve efficient decontamination, long-term corrosion prevention and durable clamping on the surface of photovoltaic modules, extend the service life of photovoltaic modules and improve power generation efficiency.

[0002] With the accelerated global energy structure transformation, photovoltaic (PV) power generation, as a crucial component of clean energy, is finding increasingly widespread applications, encompassing various locations such as industrial plants, commercial complexes, and rural rooftops. In these scenarios, PV modules are typically installed flat, conforming to the roof slope, resulting in a relatively small installation tilt angle. Over long-term use, contaminants such as dust, plant debris, and insect remains easily accumulate at the lower edges of the modules, forming a dust accumulation zone. This dust accumulation not only reduces the power generation of the PV modules but also causes hot spot effects due to prolonged coverage of the solar cells, leading to irreversible damage to the modules. Therefore, the research and improvement of PV module cleanroom devices have become a key aspect of enhancing the operational efficiency of PV systems.

[0003] The technical solution of this invention addresses the shortcomings of existing cleanroom devices in terms of corrosion resistance, creep resistance, clogging control, and insufficient drainage speed. Through structural optimization, material innovation, and process improvement, it forms an alloy-assembled cleanroom device with excellent comprehensive performance. The core of this device includes an aluminum alloy top cover and three-sided clamping buckles. The spatial M-shaped flow guiding structure formed by the main stiffening rib, secondary stiffening rib, central stiffening rib, and vertical plate is a key technical highlight. It is an important innovative achievement in the field of photovoltaic equipment supporting technology and can be widely used in various distributed and centralized photovoltaic power stations, possessing extremely high industrial application value. Background Technology

[0004] During long-term outdoor operation, dust accumulation on the surface of photovoltaic (PV) modules is one of the main factors affecting their power generation efficiency. For PV modules with a small installation tilt angle (usually less than 15°), rainwater cannot effectively wash away the surface dust, causing dust to accumulate at the lower edge of the module, forming a dust accumulation band. The light transmittance of the dust accumulation band is only 30%-50% of that of a clean module, and in severe cases, it can reduce the module's power generation by 20%-40%. To solve this problem, various water guiding and dust removal devices for PV modules have appeared on the market, but they still have many technical shortcomings in practical applications.

[0005] In existing technologies, due to inadequate materials or surface treatments, galvanic corrosion easily forms when the material comes into contact with the aluminum alloy frame of the photovoltaic module, leading to damage to the oxide film on the module frame and affecting the module's sealing performance and service life. Secondly, the material's corrosion resistance is limited; even with a hydrophilic coating, its outdoor corrosion resistance is insufficient. Thirdly, the device's flow guiding structure is simple, resulting in low drainage efficiency and an inability to achieve a collection effect, thus lacking sufficient ability to flush away large amounts of accumulated dust. Fourthly, the device cannot restrict the movement of the clips; after assembly, the clips may move excessively up and down, affecting the installation efficiency.

[0006] Other similar products disclosed include a combined anti-fall-off photovoltaic panel water guiding and ash removal device made of alloy materials. The device includes a top plate, stiffening ribs, vertical plates and spring steel clips. The downward arc design of the top plate reduces the risk of falling off during cleaning, and the stiffening ribs realize the function of guiding and draining water. However, the device revealed the following areas for improvement during long-term use: First, the top plate material was not explicitly designed to be the same aluminum alloy as the component frame, and the corresponding anti-corrosion treatment process was unreasonable, making it prone to corrosion in harsh environments such as high humidity and high salt spray; Second, the spring steel retainer structure design needs improvement and has not undergone targeted anti-creep treatment, making it prone to creep deformation under long-term clamping, leading to loosening and detachment of the device, with a high detachment rate even after 3 years of use; Third, the flow guiding structure only has two continuous stiffening ribs, failing to form a spatial flow guiding system, resulting in a single flow route, no confluence function, slow drainage speed, and the vertical plate structure makes it easy for water flow to fail to fully flush the inside of the device, leading to a high rate of clogging; Fourth, the connection between the retainer and the top plate uses a hanging lug structure, which cannot achieve complete locking of the buckle, requiring adjustment during installation, resulting in low assembly efficiency and hindering rapid construction of large-scale power plants.

[0007] In addition to the technologies disclosed in the aforementioned comparative documents, similar devices in the prior art also share the following common problems: First, insufficient corrosion resistance. Almost all devices use metal materials, failing to consider the actual needs of the application scenarios, leading to frequent replacements by the users. Besides increasing investment, this also drastically increases the risk of microcracks in photovoltaic modules during installation, especially for existing power plants. The application scenarios of this product include the following characteristics: ① Outdoor rooftop. This device is mainly used in distributed photovoltaic power generation projects and is built on rooftops. This application scenario is not an indoor environment, and the severity of the applicable scenarios is much greater than that of indoor environments.

[0008] ②These projects are mostly located in industrial areas. They are typically built on the rooftops of industrial plants within industrial parks, directly facing potential corrosion and pollution problems caused by various emissions.

[0009] ③ The device should meet the performance requirements for long-term use. The design service life of photovoltaic power stations is generally 25 years. The service life of the device on the photovoltaic modules should match the service life of the power station, and it should have strong anti-creep performance and durable and effective drainage performance.

[0010] ④ High installation difficulty. For existing power plants with large-scale installations, specific installation tools must be used to avoid or minimize the problem of microcracks in photovoltaic modules caused by installation, resulting in extremely low installation efficiency.

[0011] ⑤ High installation risk. For existing power plants, the installation of this device almost always involves working at heights, which carries extremely high risks.

[0012] ⑥ Significant impact from scratches. After the power station is built, it requires manual cleaning approximately four times a year. During the cleaning process, scratches from the equipment caused by the cleaning mop are unavoidable. According to statistics from actual applications, within three years, approximately 30% of newly installed equipment detaches due to scratches caused by unreasonable structural design and large creep deformation.

[0013] The above are the practical problems faced in the use and installation of this type of device. The existing developed devices are significantly different from meeting the requirement of maintaining the function of outdoor rooftops in industrial parks for 25 years. The surface corrosion resistance does not meet the requirements for long-term outdoor use. In corrosive environments such as coastal areas and industrial zones, rust will appear within 1-2 years. Secondly, the detachment rate is too high. Due to poor creep resistance, the device uses ordinary steel for the buckle components without optimized heat treatment. The creep deformation under long-term stress can reach 1-2mm, causing the device to loosen and detach after significant creep deformation. Thirdly, the clogging control effect is poor. The guide strips are mostly planar structures without a micro-wave design, which easily leads to laminar flow and dust accumulation. In addition, there is no special anti-clogging groove structure. There are many enclosed spaces inside the device, and rainwater cannot fully flush it. Fourthly, the flow collection function is lacking. The drainage speed of the single guide structure is limited and cannot form a high-speed water flow to enhance the flushing effect. It is not capable of flushing away highly viscous dust (such as industrial dust and agricultural straw fragments). Fifthly, the assembly structure is unreasonable. It does not achieve effective limiting of the buckles. After assembly, the buckles may still move upwards during installation, requiring manual on-site correction before installation, which will affect the installation efficiency. To address the aforementioned shortcomings of existing technologies, there is an urgent need in the field for a photovoltaic module cleaning device with long-lasting corrosion resistance, excellent creep resistance, low risk of clogging, and efficient current collection function. This device would solve problems such as short lifespan, easy detachment, high operation and maintenance costs, and poor drainage performance of existing devices, thus meeting the requirements for long-term stable operation of photovoltaic power plants. Based on this background, this invention represents a comprehensive technological upgrade of our company's patent CN222441642U. It achieves an innovative technical solution through innovative structures such as an M-shaped spatial flow guiding system, micro-wave-shaped stiffening ribs, elliptical anti-clogging grooves, and three-sided top-tightening buckles. Summary of the Invention

[0014] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a photovoltaic module enhanced alloy assembly cleanroom device, which, in addition to achieving the basic functions of effectively removing dirt and reducing clogging on the surface of photovoltaic modules and keeping the surface of photovoltaic modules clean, solves the problems of poor surface corrosion resistance, easy clogging, device creep and detachment, and unsatisfactory drainage effect.

[0015] Specific objectives include: Achieving long-term corrosion protection: By optimizing materials and combining them with newly added nano-anti-corrosion technology on the surface, the device's corrosion protection life reaches 25 years, matching the design life of the photovoltaic system and avoiding frequent replacements; at the same time, it eliminates the risk of galvanic corrosion with the photovoltaic module frame, protecting the integrity of the module frame. Improved creep resistance and anti-detachment performance: Through the improved design of the segmented buckle structure and the improvement of heat treatment, the creep resistance of the buckle is greatly improved. After long-term use (25 years), the creep deformation is controlled within 0.1mm, ensuring the stability of the device's clamping force and reducing the detachment rate to below 0.05%. Reduce the risk of clogging: By optimizing the flow guiding structure, adding anti-clogging openings and eliminating the vertical plate design, there are no closed dead corners inside the device, the rainwater flushing coverage reaches 100%, the clogging rate is reduced by more than 85%, and there is no need for frequent manual cleaning of the inside of the device. Achieving efficient flow and drainage: Through the synergistic design of the M-shaped flow guide structure and the V-shaped buckle, a secondary flow system is formed, which increases the drainage speed by more than 60% compared with traditional devices, enhances the water flow's ability to flush away accumulated dust, and is especially suitable for scenarios with excessive dust. Improved installation convenience: Through reasonable structural improvements, a three-point clamping assembly structure is achieved between the buckle and the top cover. After the device is assembled, the buckle will not move, improving construction efficiency and reducing installation costs.

[0016] The above-mentioned objective of this invention is achieved through the following technical solutions: This invention provides a photovoltaic module enhanced alloy assembled cleanroom device, comprising: a double V-shaped top cover with openings, the top cover being made of aluminum alloy; and a buckle that can limit movement after structural assembly, the buckle passing through an assembly hole on the top cover, and effectively limiting the movement of the buckle after assembly with the top cover and the buckle.

[0017] According to one embodiment of the present invention, the top cover and the buckle together constitute a secondary confluence channel for accelerating water flow.

[0018] According to one embodiment of the present invention, the surface of the top cover is provided with a nano-anti-corrosion coating, and the surface has a honeycomb microporous structure.

[0019] According to one embodiment of the present invention, the bottom of the top cover is provided with multiple stiffening ribs and upright plates.

[0020] According to one embodiment of the present invention, a plurality of the stiffening ribs are spatially connected to form a flow guiding structure that converges toward the vertical plate.

[0021] According to one embodiment of the present invention, the buckle is disposed directly below the converging point of the flow guiding structure.

[0022] According to one embodiment of the present invention, the top cover is provided with a first anti-clogging hole / assembly hole and a second anti-clogging hole.

[0023] According to one embodiment of the present invention, the plurality of stiffening ribs include a main stiffening rib, a secondary stiffening rib, and a central stiffening rib constituting an M-shaped configuration.

[0024] According to one embodiment of the present invention, the side surface of the main stiffening rib is wavy.

[0025] According to one embodiment of the present invention, the buckle is V-shaped and is tightly fitted and limited after being attached to the top cover through at least three contact points.

[0026] According to one embodiment of the present invention, the present invention provides a photovoltaic module enhanced alloy assembled cleanroom device, comprising a double V-shaped aluminum alloy top cover with openings and a snap fastener that can limit the position after structural assembly.

[0027] The top cover has two main stiffening ribs, two secondary stiffening ribs, and a central stiffening rib at its bottom. The two main stiffening ribs, the two secondary stiffening ribs, and the central stiffening rib are connected to form an M-shaped flow guiding structure. The top cover has two V-shaped inward-curving parts. The V-shaped inward-curving parts have a first anti-clogging hole and a second anti-clogging hole respectively opened on both sides of the stiffening ribs. The top cover is assembled integrally with a buckle through the addition of openings. The buckle is V-shaped and cooperates with the M-shaped flow guiding structure to form a secondary flow confluence system.

[0028] According to one embodiment of the present invention, the device is an assembled structure, which consists of two parts: a double V-shaped top cover structure with openings and a snap-fit ​​structure that can be tightened and limited on three sides after passing through the top cover.

[0029] According to one embodiment of the present invention, the entire surface of the top cover is coated with a nano-anti-corrosion material layer, and the surface has honeycomb-shaped micropores.

[0030] According to one embodiment of the present invention, anti-clogging grooves are respectively provided at the connection points between the two ends of the two secondary stiffening ribs that are far apart from each other and the main stiffening rib, and the anti-clogging grooves are semi-elliptical.

[0031] According to one embodiment of the present invention, both sides of the main stiffening rib are adjusted from a planar shape to a slightly wavy shape.

[0032] According to one embodiment of the present invention, the front end of the main stiffening rib protrudes from the front edge of the top cover to form a drainage edge.

[0033] According to one embodiment of the present invention, the main stiffening rib extends downward from the edge of the top cover to form a vertical plate, the side of the vertical plate is provided with a limiting plate, the bottom end of the vertical plate is horizontal and a semi-circular limiting groove is provided in the middle position, and the corners are chamfered.

[0034] According to one embodiment of the present invention, the central stiffening rib slopes downward and inward from the edge of the top cover to form a vertical plate, with the end being rounded.

[0035] According to one embodiment of the present invention, the two secondary stiffening ribs are respectively disposed along the inner edge of the two V-shaped inward portions of the top cover from the front end of the top cover. The two secondary stiffening ribs extend rearward and are connected to the central stiffening rib at the connection between the two V-shaped inward portions of the top cover.

[0036] According to one embodiment of the present invention, the two secondary stiffening ribs are connected to the two wavy main stiffening ribs on both sides, and the whole structure is M-shaped after the connection. The M-shape is connected to the three facades of the main stiffening ribs and the central stiffening ribs that bend downwards at the edge of the top cover, thus forming the spatial flow guiding system of the device.

[0037] According to one embodiment of the present invention, the top cover is provided with two snap-fit ​​pads, the two snaps extend downward along the pads and are close to the limiting plate, and after being bent horizontally, they are close to the bottom end of the main stiffening rib.

[0038] According to one embodiment of the present invention, the buckle tilts downward and inward again and then closes at the bottom of the buckle. The buckle is V-shaped as a whole. After the buckle is combined with the four M-shaped stiffening ribs of the top cover, a system that realizes two confluences is formed.

[0039] According to one embodiment of the present invention, the main stiffening rib, the secondary stiffening rib, and the central stiffening rib all serve as guide strips.

[0040] According to one embodiment of the present invention, the buckle includes two rods with a symmetrical structure. The rods include a first rod, a second rod, a third rod, and a fourth rod that are integrally formed and connected in sequence. The two rods are assembled and joined together between the two fourth rods to form a V-shaped structure.

[0041] According to one embodiment of the present invention, the buckle is made of stainless steel and undergoes an anti-creep heat treatment process during its preparation. The heat treatment process includes: quenching the buckle blank at 200-400℃ and then naturally cooling it to room temperature. After the heat treatment, the buckle has a creep deformation of ≤0.1mm under a continuous stress of 200MPa for 25 years, and the scraping and falling-off rate of the device is reduced by about 600 times, ensuring that the device can be permanently attached to the side of the photovoltaic module.

[0042] According to one embodiment of the present invention, the nano-anti-corrosion coating on the surface of the top cover is made by coating nanomaterials onto the outer surface of the top cover, with a coating thickness of 10-40μm. After coating, the coating is cured in a hot air circulating oven at 100-300℃. The adhesion of the cured nano-anti-corrosion coating reaches level 5B (GB / T 9286-1998 cross-cut test), and its lifespan can be extended by 3-4 times after passing the acidic salt spray test of GB / T10125-2021 standard.

[0043] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: 1. Significant Long-Lasting Corrosion Protection and Component Protection: The top cover is made of aluminum alloy with a nano-anti-corrosion coating. After passing acid salt spray testing (GB / T 10125-2021), its corrosion resistance lifespan can be increased by approximately 3-4 times, perfectly matching the design life of the photovoltaic system. No mid-term replacement is required, significantly reducing operation and maintenance costs. The top cover structure increases the rainwater runoff speed by 20%, reducing the risk of corrosion caused by rainwater residue. Simultaneously, the contact of the same materials avoids galvanic corrosion.

[0044] 2. Significantly Improved Creep Resistance and Anti-Loss Performance: The segmented structure and heat treatment of the buckle greatly enhance its creep resistance. Its unique four-segment rod structure and three-sided clamping design significantly improve clamping stability. In stress relaxation tests simulating 25 years of use, the device's detachment rate dropped to below 0.05%, solving the industry pain point of "frequent detachment after 3 years of installation" in existing devices. The M-shaped airflow guiding structure of the top cover increases the out-of-plane stiffness of the top cover by 40%. Combined with the stable clamping of the buckle, the device showed no loosening during a Category 12 typhoon (wind speed 32.7 m / s) test, making it suitable for various harsh weather environments.

[0045] 3. Significantly reduced risk of clogging: Through a multi-dimensional anti-clogging design of "hole + groove + wave-shaped structure", the internal rainwater flushing coverage reaches 100%, the micro-wave-shaped guide strips increase the turbulence of water flow and avoid dust accumulation; the elliptical anti-clogging grooves specifically solve the problem of dust accumulation under the top cover of the structure.

[0046] 4. Significantly Improved Drainage and Collection Efficiency: The secondary drainage system formed by the M-shaped spatial guide system and the V-shaped clips improves efficiency by over 60% compared to similar products. The drainage edge structure at the front end of the main stiffening rib increases rainwater collection efficiency by 30%, effectively removing sticky dust (such as cement dust and straw fragments). Module power generation increases by 3%-8%. Based on a 1MW photovoltaic power station, this can increase power generation by 30,000-80,000 kWh annually, generating an additional revenue of 15,000-40,000 yuan.

[0047] 5. Improved ease of installation and maintenance: The three-sided, tightly fitted integrated assembly structure further shortens the installation time of a single device compared to our previous patent CN222441642U, increasing construction efficiency by 25%. Disassembly of the device is equally convenient, requiring no tools and facilitating future maintenance.

[0048] 6. Outstanding economic and environmental benefits: The manufacturing cost of this device is only 10%-15% higher than that of similar products, but its service life is extended by 3-4 times, resulting in an overall cost-effectiveness improvement of over 200%. Furthermore, the device is 100% recyclable, meeting green environmental protection requirements, reducing waste generation, and helping the photovoltaic industry achieve its "carbon peak and carbon neutrality" goals. Attached Figure Description

[0049] Figure 1 This is a side view of the top cover of the present invention.

[0050] Figure 2 This is a top view of the top cover of the present invention.

[0051] Figure 3 This is a rear view of the top cover of the present invention.

[0052] Figure 4 This is a side view of the buckle of the present invention.

[0053] Figure 5 This is a rear view of the snap fastener of the present invention.

[0054] Figure 6 This is a side view of the present invention.

[0055] Figure 7 This is a rear view of the present invention.

[0056] Figure 8 This is a schematic diagram of water flow guidance and primary confluence of the present invention.

[0057] Figure 9 This is a schematic diagram of water flow guidance and secondary confluence of the present invention.

[0058] Attached reference numerals: 1. Top cover; 11. Main stiffening rib; 111. Slightly wavy shape; 112. Drainage edge; 12. Secondary stiffening rib; 13. Central stiffening rib; 2. Buckle; 21. First rod; 22. Second rod; 23. Third rod; 24. Fourth rod; 3. First anti-clogging hole; 4. Second anti-clogging hole; 5. Anti-clogging groove; 6. Vertical plate; 6-1. Limiting groove; 7. Limiting plate; 8. Buckle pad. Detailed Implementation

[0059] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] This invention discloses a photovoltaic module enhanced alloy assembled cleanroom device. Based on our company's patent CN222441642U, this device, through structural optimization and process improvements, forms a comprehensive technical solution with long-term corrosion resistance, creep resistance, anti-flow-through, anti-clogging, and flow-gathering functions. The core innovations lie in the assembled structure of the top cover and three-sided clamping fasteners, the M-shaped space flow guiding system, and the multi-dimensional anti-clogging design. Its core technical solution is as follows: The device mainly consists of two parts: an aluminum alloy top cover 1 and a three-sided clamping buckle 2 with creep resistance. The two are assembled as a whole through newly added openings, and the entire assembly is fixed to the aluminum alloy frame of the photovoltaic module by the clamps 2. The prefabricated structure design of the device eliminates the need for tools during installation and disassembly, significantly improving construction efficiency. Specific technical features include: Long-lasting anti-corrosion system design: The top cover 1 is made of aluminum alloy, which has excellent mechanical properties and corrosion resistance, preventing galvanic corrosion when in contact with the component frame. The top cover 1, as a curved structure with three additional stiffening ribs, not only optimizes water flow guidance but also improves the out-of-plane stiffness of the structure. The entire surface of the top cover 1 is coated with a nano-anti-corrosion coating, which is cured at approximately 200-400℃ to form a dense anti-corrosion protective layer. This coating exhibits excellent corrosion resistance.

[0063] Creep-resistant buckle structure and process: Buckle 2 features a four-segment structure improved with heat treatment, ensuring the device maintains internal dimensional stability even under long-term use. Its unique rod structure comprises a first rod 21, a second rod 22, a third rod 23, and a fourth rod 24, all integrally formed and sequentially connected. Two symmetrical rods are assembled and joined at the fourth rod 24 to form a V-shape. This segmented rod design provides the buckle with excellent dimensional and clamping stability. Under a continuous stress of 200 MPa, the creep deformation over 25 years is ≤0.1 mm. After buckle 2 is inserted into the top cover 1, it achieves three-sided clamping, ensuring post-assembly stability and preventing movement.

[0064] M-shaped spatial flow guiding and secondary confluence structure: The bottom of the top cover 1 is equipped with three stiffening ribs that also serve as flow guides, including two main stiffening ribs 11, two secondary stiffening ribs 12, and one central stiffening rib 13, forming a unique M-shaped spatial flow guiding system. The main stiffening ribs 11 extend downward from the edge of the top cover 1, and the two sides are adjusted from the traditional planar shape to a micro-wave-shaped structure 111 (wavelength 20-30mm, wave height 3-5mm). The front end protrudes from the front edge of the top cover to form an arc-shaped flow guide edge 112, which can effectively reduce water flow resistance and guide rainwater to flow quickly into the device. The secondary stiffening ribs 12 extend backward along the inner edge of the V-shaped inward part of the top cover. The two ends that are far apart from each other are opened at the connection with the main stiffening ribs 11, which not only avoids dust accumulation at the connection, but also forms an integral flow guiding system through the connection. The central stiffening rib 13 is inclined downward and inward from the edge of the top cover at 30-45°, and the end is equipped with a circular structure to prevent water accumulation at the end of the sewage discharge period. Two secondary stiffening ribs 12 connect with the two wavy main stiffening ribs 11 to form an M-shape. This M-shape, along with the main stiffening ribs 11 and the central stiffening rib, extends downwards from the edge of the top cover 1, forming the spatial flow guiding system of the device. Water flows into the bottom plate of the M-shape at its first convergence point. The V-shaped buckle 2 cooperates with the M-shaped flow guiding structure, allowing the water to flow downwards along the buckle wall after the first convergence. A second convergence occurs at the bottom of the buckle, forming a high-speed water jet and enhancing the scouring effect.

[0065] Multi-dimensional anti-clogging design: This device adopts a multi-dimensional anti-clogging solution of "holes + grooves + structural optimization", which greatly reduces the clogging problem of existing devices. First, the V-shaped inward part of the top cover has a first anti-clogging hole 3 and a second anti-clogging hole 4 on both sides of the stiffening rib, which facilitates the water flow to enter the device and flush the sides of the stiffening rib. Second, an elliptical anti-clogging groove 5 is opened at the connection between the secondary stiffening rib 12 and the main stiffening rib 11 to specifically solve the problem of dust accumulation and clogging under the top cover. Third, the vertical plate structure of the traditional device is eliminated, so that the main stiffening rib 11 is directly exposed to the water flow, and the interior of the device is thoroughly flushed by rainwater or cleaning water, with no dead corners for cleaning. Fourth, the micro-wave-shaped structure of the main stiffening rib 111 disrupts the laminar flow state of the water flow and forms turbulence, which avoids dust accumulation and sedimentation. The disturbance ability of the turbulence can pick up and carry away the dust accumulated on the surface of the components.

[0066] Quick-assembly and anti-movement structure: The top cover 1 is equipped with two snap-fit ​​pads 8 to achieve the first tightening between the snap-fit ​​2 and the top cover; after the snap-fit ​​2 extends downward, it comes into close contact with the limiting plate 7 of the main stiffening rib upright plate 6, forming the second tightening; after the snap-fit ​​is bent horizontally, it fits tightly with the semi-circular limiting hole at the middle of the bottom end of the upright plate of the main stiffening rib 11, forming the third tightening. The three tightening structures enable the snap-fit ​​2 and the top cover 1 to achieve integral assembly, with a firm connection, and the vertical movement gap is controlled within 0.1mm, and the left and right sway does not exceed 0.1mm. At the same time, it enables quick snap-fit ​​of the device, and assembly and disassembly can be completed without tools. The chamfering treatment of the limiting plate 7 on the side of the main stiffening rib upright plate 6 and the bottom end of the upright plate ensures assembly accuracy and avoids scratching the operator during installation.

[0067] The technical solution of this invention, through the synergistic effect of the aforementioned components, solves many defects of existing devices, forming a photovoltaic module cleanroom device with a reasonable structure and excellent performance. In this technical solution, the various technical features are not simply superimposed, but rather interconnected and mutually reinforcing. For example, the M-shaped spatial flow guiding system not only achieves the confluence function but also enhances the out-of-plane stiffness of the top cover (more than 40% higher than our previous patent CN222441642U); the combination of the nano-anti-corrosion coating and the aluminum alloy curved top cover eliminates galvanic corrosion and achieves long-term corrosion protection and rapid water flow guidance; the combination of the three-sided top-tightening buckle and the integrated assembly structure improves installation efficiency and ensures long-term stability of the device. The organic combination of these technical features gives the device outstanding technical advantages, significantly differentiating it from existing technologies. Example 1

[0068] Reference Figures 1-9 This embodiment of the present invention provides a photovoltaic module enhanced alloy assembled cleanroom device, which is suitable for installing distributed photovoltaic modules with a tilt angle of 0-15°.

[0069] Aluminum alloy curved top cover 1: The top cover 1 adopts a curved design with added stiffening ribs, which not only improves the out-of-plane stiffness of the structure, but also optimizes the water flow guidance; the front end is provided with a flow guide edge 112, which is integrally formed with the main stiffening rib 11 and is in the shape of an arc, in order to reduce water flow resistance; the middle part is provided with two V-shaped inward sections, so that the top cover cross section has a "waist-shaped" structure, which enhances the water flow convergence effect.

[0070] Nano-anti-corrosion coating: After spraying, place the top cover 1 in a hot air circulating oven at about 200-400℃ for about 30 minutes to cure, so that the coating is tightly bonded to the substrate and the adhesion reaches 5B (cross-cut test, GB / T 9286-1998).

[0071] Stiffening ribs (also serving as guide strips): These include main stiffening rib 11, secondary stiffening rib 12, and central stiffening rib 13, all integrally die-cast with the top cover 1, and made of aluminum alloy. The four connection points of the M-shaped guide structure are equipped with reinforcing ribs to enhance structural stability. The thickness of the reinforcing ribs is 1.5mm, and their height is consistent with the corresponding stiffening ribs.

[0072] Anti-clogging structure: includes a first anti-clogging hole 3, a second anti-clogging hole 4, and an anti-clogging groove 5. The first anti-clogging hole 3 in the V-shaped inward part of the top cover 1 is oblong, and the second anti-clogging hole 4 is triangular. Two anti-clogging holes are opened in each V-shaped part, symmetrically distributed. The anti-clogging groove 5 at the connection between the secondary stiffening rib 12 and the main stiffening rib 11 is elliptical. One groove is opened at each connection, for a total of two.

[0073] Clip-on pad 8: integrally die-cast with the top cover to ensure that the pad will not fall off during long-term use. The two clip-on pads 8 are symmetrically distributed and correspond to the position of the first rod 21 of the clip 2 to achieve the first tightening.

[0074] Limiting plate 7 and upright plate 6: The main stiffening rib 11 extends downward from the edge of the top cover 1 to form the upright plate 6, with the same thickness as the main stiffening rib; the limiting plate 7 and the upright plate 6 are integrally formed, and the gap between the limiting plate 7 and the second rod 22 of the buckle 2 is controlled within 0.1mm to achieve the second clamping; the bottom of the upright plate 6 is horizontal, and the corner is chamfered to avoid scratching the operator. At the same time, the semi-circular limiting groove set in the middle position fits tightly with the third rod 23 of the buckle 2 to form the third clamping. The bottom of the upright plate 6 has a limiting groove 6-1.

[0075] The clip 2 is made of stainless steel and undergoes an anti-creep heat treatment process during its manufacturing. The heat treatment process includes quenching the clip blank at 200-400℃ and then naturally cooling it to room temperature. After heat treatment, the clip 2 has a creep deformation of ≤0.1mm under continuous stress of 200MPa for 25 years, and the scraping and falling-off rate of the device is reduced by about 600 times, ensuring that the device can be permanently attached to the side of the photovoltaic module.

[0076] The nano-anti-corrosion coating on the surface of the top cover 1 is made by coating nanomaterials onto the outer surface of the top cover. The surface has a honeycomb microporous structure and the coating thickness is 10-40μm. After coating, the coating is cured in a hot air circulating oven at 100-300℃. The adhesion of the cured nano-anti-corrosion coating reaches level 5B (GB / T 9286-1998 cross-cut test). After passing the acid salt spray test of GB / T 10125-2021 standard, the service life can be extended by 3-4 times.

[0077] This device adopts a modular structure, which can be assembled with photovoltaic modules without tools. The specific assembly steps are as follows: Component preparation: Check whether the nano anti-corrosion coating of the top cover 1 is intact and free from scratches or peeling; check the heat treatment quality of the buckle 2 to ensure that there is no deformation or cracks; clean the dust and oil stains on the surface of the component frame to ensure that the contact surface is clean.

[0078] Assembly of the buckle and top cover: Insert the first rod 21 of the buckle 2 into the newly added opening in the top cover 1, so that the top of the first rod fits tightly against the pad 8 on the top cover 1, forming the first tightening point; adjust the position of the buckle so that the second rod 22 of the buckle is close to the limiting plate 7 of the main stiffening rib upright plate 6, forming the second tightening point; press the third rod 23 of the buckle so that it fits tightly against the middle limiting groove 6-1 at the horizontal bottom end of the upright plate 6, forming the third tightening point. After assembly, the buckle 2 and the top cover 1 are firmly connected, with vertical movement not exceeding 0.1mm and horizontal sway not exceeding 0.1mm, achieving an integral assembly effect.

[0079] Assembly of the device and the frame of the module: Align the assembled device with the lower edge of the photovoltaic module frame, so that the V-shaped opening of the buckle 2 is aligned with the bottom of the frame; gently press the top of the device, and use the elastic deformation of the buckle to open the V-shaped buckle and fit into the frame; after releasing the press, the buckle tightens under the action of elastic force, and the toothed structure is embedded in the surface of the frame to achieve permanent fixation.

[0080] Assembly Inspection: After assembly, manually shake the device to check for any looseness; observe whether the buckles and frame are in tight contact and whether the toothed structure is effectively embedded; check whether the drainage channel of the M-shaped guide structure is unobstructed. The assembly time for a single device is approximately 2 seconds, and skilled workers can achieve even higher efficiency.

[0081] The device is also easy to disassemble. Simply pinch the bottom of the buckle 2 with your fingers and pull outward to open the buckle, then you can remove the device from the component frame for easy maintenance or replacement later.

[0082] This invention discloses a photovoltaic module enhanced alloy assembly cleanroom device. Its working principle is based on fluid mechanics, materials mechanics, and corrosion prevention technology. Through the synergistic effects of flow guidance, flow convergence, flushing, and permanent fixation, it achieves cleanliness and protection of the photovoltaic module surface. The specific working process is as follows: Rainwater harvesting and initial drainage: When rainwater falls on the surface of the photovoltaic module, due to the small tilt angle of the module, the rainwater flows downward along the surface of the module and collects in the device area at the lower edge of the module. The arc-shaped drainage edge 112 at the front end of the top cover 1 reduces the surface tension of the water flow, guides the rainwater smoothly into the gap between the top cover and the module frame, and avoids rainwater splashing.

[0083] Primary confluence and turbulence formation: Rainwater entering the device splits into multiple streams, flowing along the wavy side of the main stiffening rib 111 and the side of the secondary stiffening rib 12. The wavy structure of the main stiffening rib disrupts the laminar flow, creating turbulence. This turbulence has a stronger disturbance capability, capable of lifting and carrying away accumulated dust from the component surface. The elliptical anti-clogging groove 5 at the connection between the secondary stiffening rib 12 and the main stiffening rib 11 allows the water flow to flush the gap at the connection, preventing dust accumulation. The multiple turbulent streams converge at the bottom of the three vertical plates of the spatial flow guiding system, forming three larger flow streams, thus achieving primary confluence.

[0084] Secondary confluence and high-speed flushing: After the initial confluence, the water flows downwards along the inclined surface of the vertical plate 13 and the bottom surface of the vertical plate 6, entering the internal space of the V-shaped buckle 2, and flowing along the outer walls of the second rod 22 and the third rod 23 of the buckle. The outer wall of the V-shaped buckle guides the water flow to converge at the bottom where the fourth rod 24 is joined. As the water flow cross-section gradually decreases (from 4 channels in the M-shaped structure to 1 channel in the V-shaped structure), according to the continuity equation (Q=A×v), the water flow velocity increases significantly, forming a high-speed water jet (flow velocity can reach 1.0-1.2m / s). The high-speed water jet is ejected from the bottom of the buckle, powerfully flushing the dust accumulation strip on the lower edge of the component, completely removing the dust and achieving a clean surface for the component.

[0085] Anti-clogging and self-cleaning: During water flow, the first anti-clogging hole 3 and the second anti-clogging hole 4 on the top cover 1 allow some rainwater to flow directly into the device, rinsing the gaps between the stiffening ribs; the elliptical anti-clogging groove 5 at the connection between the secondary stiffening rib 12 and the main stiffening rib 11 ensures that accumulated dust at the connection is carried away by rainwater, preventing clogging. The elimination of the vertical plate design leaves no enclosed space inside the device, allowing rainwater to thoroughly wash the surfaces of each rod of the buckle 2, cleaning the dust attached to the buckle. At the same time, rainwater forms droplets on the surface of the top cover and rolls off quickly, further reducing dust adhesion.

[0086] Durable Fixation and Long-Term Protection: The clip 2, after undergoing anti-creep treatment, combined with its segmented rod structure and three-sided clamping design, ensures the device maintains a stable clamping force over a long period, firmly fixing the device to the component frame. It will not loosen or fall off even under harsh conditions such as cleaning, scratches, strong winds, or vibrations. The top cover 1 is made of the same aluminum alloy as the component frame, preventing galvanic corrosion; the nano-anti-corrosion coating effectively isolates air, moisture, and corrosive media, protecting the top cover and clips from corrosion and ensuring long-term stable operation of the device.

[0087] In the scenario of manually cleaning photovoltaic modules, the working principle of the cleaning water flow is similar to that of rainwater. The high-speed cleaning water flow passes through the secondary confluence system formed by the device, which can achieve more efficient ash washing. At the same time, the downward arc design of the device avoids the device from falling off due to the scraping of the cleaning tools.

[0088] To verify the technical performance of the device of the present invention, a series of tests were conducted in accordance with relevant national standards and industry specifications. The test results are as follows: Corrosion resistance test: According to GB / T 10125-2021 "Artificial Atmosphere Corrosion Test Salt Spray Test", acidic salt spray test was conducted. After the test, there was no rust or coating peeling on the surface of the device. There was only a slight color difference at the edge of the opening. The service life of corrosion resistance can reach 4-5 times that of similar products, which is far superior to similar products.

[0089] Creep resistance test: According to GB / T 2039-2012 "Metallic Materials - Uniaxial Tensile Creep Test Method", the device was subjected to a creep test under a stress of 200 MPa. The test results showed that the total creep deformation of the buckle was 0.08 mm, the creep rate remained stable below 5 × 10^-8 / h, and the clamping force retention rate was 96.5%, far superior to similar products. The segmented structure of the buckle makes the stress distribution more uniform, further improving the creep resistance.

[0090] Anti-detachment performance test: The edges of the photovoltaic modules (where the device is installed) were repeatedly wiped with a mop during a simulated manual cleaning process. After the test, the device showed no loosening or displacement, the fasteners were firmly connected to the frame, and the detachment rate was 0%.

[0091] Clogging Performance Test: In a simulated industrial dust environment (dust concentration of 100 mg / m³, dust particle size of 1-10 μm), the device was installed on photovoltaic modules and operated continuously for 6 months. During this period, simulated rain rinsing was conducted every two weeks (rainfall of 20 mm / h for 30 minutes). After the test, the device was disassembled to check the internal dust accumulation. The overall clogging rate of this device was only 2.8%, with a clogging rate of only 0.5% in the five anti-clogging channels, indicating unobstructed drainage. In comparison, the clogging rates of similar products were 46.2% and 31.5%, respectively, with some drainage channels completely blocked. The advantages of the multi-dimensional anti-clogging design are significant.

[0092] Drainage efficiency test: Under laboratory conditions, simulating rainfall of 50 mm / h, the drainage velocity and ash removal rate of the device were measured. The average drainage velocity of this device was 1.05 L / s, where the M-type flow guiding system improved rainwater collection efficiency by 30%, and the secondary confluence increased the outlet water flow velocity by 60%; the ash removal rate was 95.3%. The drainage efficiency and ash removal effect of this device are significantly better than existing technologies.

[0093] Economic Feasibility Test: Taking a 1MW photovoltaic power station as an example, calculate the overall cost and benefits of the device. The initial investment cost of this device is 5,000 yuan (1.25 yuan / unit, 4,000 units in total). This device has a longer service life and requires no replacement in most scenarios; compared to similar products, it needs to be replaced 3 times over 25 years, with a total investment cost of 15,000 yuan. In addition to saving investment costs, it also saves approximately 5,000 yuan in installation costs twice. Furthermore, this device increases module power generation by approximately 3%-8%, increasing annual revenue by 15,000 to 40,000 yuan, demonstrating significant economic advantages.

[0094] The implementation principle of this invention is as follows: This invention relates to a photovoltaic module enhanced alloy assembled cleanroom device, including an aluminum alloy top cover 1 and a snap fastener 2 with creep resistance. The bottom of the top cover 1 is provided with two main stiffening ribs 11, two secondary stiffening ribs 12, and a central stiffening rib 13. The two main stiffening ribs 11, the two secondary stiffening ribs 12, and the central stiffening rib 13 are connected to form an M-shaped flow guiding structure. The top cover 1 has two V-shaped inward-curving parts, and the V-shaped inward-curving parts have a first anti-clogging hole 3 and a second anti-clogging hole 4 respectively opened on both sides of the stiffening ribs. The top cover 1 is integrally assembled with the snap fastener 2 through the added openings. The snap fastener 2 is V-shaped in overall shape and cooperates with the M-shaped flow guiding structure to form a secondary flow collection system. In addition to achieving the basic functions of effectively draining dirt and reducing clogging on the surface of photovoltaic modules and keeping the surface of photovoltaic modules clean, it solves the problems of poor surface corrosion resistance, easy clogging, device creep leading to detachment, and unsatisfactory drainage effect.

[0095] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic module-enhanced alloy-assembled cleanroom device, characterized in that, include: A double V-shaped top cover (1) with openings, wherein the top cover (1) is made of aluminum alloy; The structure is assembled with a retaining buckle (2) that can limit the movement of the buckle. The buckle (2) passes through the assembly hole on the top cover (1). After the top cover (1) and the buckle (2) are assembled, the movement of the buckle can be effectively limited.

2. The photovoltaic module enhanced alloy assembly cleanroom device according to claim 1, characterized in that, The top cover (1) and the buckle (2) together form a secondary confluence channel for accelerating water flow.

3. The photovoltaic module enhanced alloy assembled cleanroom device according to claim 1, characterized in that, The surface of the top cover (1) is provided with a nano-anti-corrosion coating and has a honeycomb microporous structure.

4. The photovoltaic module enhanced alloy assembly cleanroom device according to claim 1, characterized in that, The bottom of the top cover (1) is provided with multiple stiffening ribs and upright plates.

5. A photovoltaic module-enhanced alloy-assembled cleanroom device according to claim 4, characterized in that, The multiple stiffening ribs and uprights are spatially connected to form a flow guiding structure that converges towards the uprights.

6. A photovoltaic module enhanced alloy assembly cleanroom device according to claim 5, characterized in that, The buckle (2) is located directly below the convergence point of the flow guiding structure.

7. A photovoltaic module-enhanced alloy-assembled cleanroom device according to claim 4, characterized in that, The top cover (1) is provided with a first anti-clogging hole and assembly hole (3) and a second anti-clogging hole (4).

8. A photovoltaic module-enhanced alloy-assembled cleanroom device according to claim 4, characterized in that, The multiple stiffening ribs include the main stiffening rib (11), the secondary stiffening rib (12), and the central stiffening rib (13) that constitute the M-shaped configuration.

9. A photovoltaic module enhanced alloy assembly cleanroom device according to claim 8, characterized in that, The side structure of the main stiffening rib (11) is wavy (111).

10. A photovoltaic module-enhanced alloy-assembled cleanroom device according to claim 1, characterized in that, The buckle (2) is V-shaped and is positioned after assembly with the top cover (1) through at least three contact points.

11. A photovoltaic module enhanced alloy assembly cleanroom device according to claim 1, characterized in that, The buckle (2) is made of stainless steel and undergoes an anti-creep heat treatment process during its preparation.

12. A photovoltaic module-enhanced alloy-assembled cleanroom device according to claim 1, characterized in that, The surface of the top cover (1) is coated with nanomaterials.

Images