Rainwater washing dust accumulation prevention assembly

Abstract

The utility model discloses a rain wash dust deposition prevention assembly, which comprises an upper frame, a lower frame, a solar cell module, a left frame and a right frame, the solar cell module is fixed in a framework formed by the upper frame, the lower frame, the left frame and the right frame, and one surface A, which is in contact with the upper surface of the solar cell module, of the lower frame is designed into a cambered surface. And the cambered surface is high in lower part and low in upper part. According to the utility model, the dust accumulation phenomenon on the surface of the solar cell module can be effectively improved, so that the hot spot effect caused by dust accumulation is effectively prevented, the service life of the solar cell module is prolonged, and the generating capacity is increased; higher self-cleaning capability means fewer maintenance times, and meanwhile, the maintenance cost of the solar cell module can be effectively reduced; the method can be applied to long and short frames of the solar cell module, so that the phenomenon of dust accumulation on the surface of the solar cell module can be effectively improved no matter the solar cell module is vertically or transversely mounted, and the method is not limited by the mounting direction of the solar cell module.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaics, and in particular relates to a rainwater scouring and dust accumulation prevention component. Background Art

[0002] The ultimate goal of installing solar photovoltaic modules is to maximize power generation. During the entire life cycle of solar modules, cleaning and maintenance of solar modules is one of the important factors in improving the power generation of modules. The problem of dust accumulation on the surface of modules is a problem that almost all solar photovoltaic power generation systems need to face. At the same time, a large number of examples have shown that dust can cause power generation loss in photovoltaic power stations. The dust accumulation on the surface of the modules seriously blocks local cells, consumes electricity and causes local heating, triggering the hot spot effect and thus reducing the life of the modules.

[0003] Dust has many physical properties, including particle size, color, density, water absorption, thermal conductivity, dispersion, adhesion, etc. Among them, particle size, thermal conductivity, water absorption, adhesion, friction, etc. are all physical properties closely related to photovoltaic power generation. Most dust is water-absorbent, and dust can be divided into dry loose dust and sticky dust according to its water absorption degree. Dry loose dust is generally easier to blow away, but when its particles are wet, it is easy to form sticky dust, which has strong adsorption and is generally difficult to remove.

[0004] There are two main sources of dust in the air: natural and man-made. The natural sources of dust are mainly soil, rocks, and atmospheric precipitation. After weathering and other natural processes, they are broken into fine particles and transported to various places under the action of the aerodynamic system; the man-made sources of dust are mainly generated in the process of human production activities and are greatly affected by humans, such as urban transportation, construction, industrial processing, combustion, etc.

[0005] Judging from the distribution of dust accumulation on the components actually installed on site, the dust accumulation belt is mainly distributed at the bottom frame of the components. The reason is that the falling raindrops wash the dust impurities mixed in the air and the original dust on the surface of the components to the bottom frame of the components and gather them together to form the dust accumulation phenomenon.

[0006] After preliminary analysis, the source of dust accumulation on the components is that the height difference between the component frame and the glass surface will cause rainwater to accumulate. At the same time, the rainfall will wash the dust and powder floating in the air and the original dry and loose dust on the component surface to the lowest point of the component surface. The height difference between the frame and the component glass surface where the rainwater accumulates, plus the surface tension of the water, the aluminum frame at the lowest point of the component will block part of the gray-water mixture, forming a "dammed lake" phenomenon. The sun's radiation causes water to evaporate, but the impurities and dust contained in the water remain on the surface of the component as the water evaporates, and gradually firmly adsorb on the surface of the component as the water disappears. When the rain falls again, because the dust is firmly adsorbed on the surface of the component, it will not be washed away by the rain. Instead, the rain will bring new impurities and dust to the surface of the component again. In this cycle, the component forms a thick layer of dust accumulation.

[0007] There are usually several solutions: (1) Coating the surface of the module to reduce dust adhesion and use rainwater to wash away the dust. However, the life of this film is limited and will gradually disappear under the sun for a year. In addition, rainwater can only take away part of the dust, which will still cause dust accumulation on the frame; (2) Regularly organize manual cleaning. This cleaning method has low work efficiency, long cleaning cycle, high labor cost, and personal safety hazards. At the same time, large-scale photovoltaic power stations rarely use manual scrubbing; (3) Choose automatic machine cleaning. Machine cleaning is efficient, but the cleaning cost is high. Summary of the invention

[0008] The purpose of the utility model is to solve the problem that the dust accumulation belt on the surface of the component seriously blocks the local battery cells, consumes electric energy and causes local heating, triggers the hot spot effect and reduces the life of the component, and provides a rain erosion anti-dust accumulation component, which can increase the power generation of the component and reduce the maintenance cost of the component, thereby fundamentally improving the problem of dust accumulation in the component.

[0009] The technical solution adopted by the utility model is:

[0010] A rainwater scouring and dust accumulation prevention component comprises an upper frame, a lower frame, a solar cell assembly, a left frame, and a right frame. The solar cell assembly is fixed in a frame composed of the upper frame, the lower frame, the left frame, and the right frame. The feature is that a side A of the lower frame in contact with the upper surface of the solar cell assembly is designed to be an arc surface, and the arc surface is higher at the bottom and lower at the top. Since the height difference of the side A of the lower frame in contact with the upper surface of the solar cell assembly is reduced compared to the height difference of the upper surface of the solar cell assembly along the vertical direction of the glass surface, and the curvature of the side A of the lower frame in contact with the upper surface of the solar cell assembly is changed at the same time, it is more conducive to drainage and greatly improves the occurrence of the "dammed lake" phenomenon.

[0011] A hydrophobic layer is added on the side A where the lower frame contacts the upper surface of the solar cell module, so that the falling raindrops slide down along the arc of the side A where the lower frame contacts the upper surface of the solar cell module under the action of their own gravity, and cannot gather at the joint between the side A where the lower frame contacts the upper surface of the solar cell module and the upper surface of the solar cell module, thereby fundamentally preventing the occurrence of the "dammed lake" phenomenon.

[0012] The hydrophobic layer is an electroplated hydrophobic metal coating or a coated hydrophobic material layer.

[0013] The hydrophobic material coating layer is formed by coating with fluorine material, silicon material, a composite material of fluorine and silicon, perfluoroethylene propylene copolymer FEP, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene PTFE or fluorinated polyethylene, so as to effectively improve the surface hydrophobicity effect.

[0014] The electroplated hydrophobic metal coating is formed by electroplating metal nickel. The hydrophobic metal coating has inherent advantages in terms of wear resistance, fatigue resistance and bonding strength. Preparing a hydrophobic nickel coating with a micro-nanoscale structure on the surface of the substrate can effectively improve the surface hydrophobicity and form a hydrophobic and corrosion-resistant nickel coating.

[0015] The rainwater scouring and dust accumulation prevention component of the utility model adjusts the surface structure of the side A where the lower frame contacts the upper surface of the solar cell component, thereby reducing the height difference between the lower frame and the upper surface of the solar cell component in the vertical direction of the glass surface, and at the same time changes the curvature of the side A where the lower frame contacts the upper surface of the solar cell component, so that the falling raindrops slide down along the curvature of the side A where the lower frame contacts the upper surface of the solar cell component under the action of their own gravity, so that the rainwater gathered at the lower edge of the solar cell component can be discharged as soon as possible.

[0016] The rainwater scouring and dust prevention components can be installed horizontally or vertically.

[0017] During the packaging process of the component, the location of the frame glue and the amount of sealant used are different from those of conventional component packaging.

[0018] The beneficial effects of the utility model are as follows: on the one hand, the rainwater scouring anti-dust accumulation component of the utility model can effectively improve the dust accumulation phenomenon on the surface of the solar cell component, thereby effectively preventing the hot spot effect caused by dust accumulation, extending the service life of the solar cell component, and increasing the power generation; on the other hand, higher self-cleaning ability means fewer maintenance times, and at the same time can effectively reduce the maintenance cost of the solar cell component;

[0019] In addition, the solar cell assembly can be applied to both long and short frames, so that the solar cell assembly can effectively improve the dust accumulation on the surface of the solar cell assembly regardless of whether the solar cell assembly is installed vertically or horizontally, and is not restricted by the installation direction of the solar cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the vertical installation structure of the utility model.

[0021] Figure 2 This is a partial enlarged view of the lower edge of the vertical installation of the utility model.

[0022] Figure 3 This is a schematic diagram of the horizontal installation structure of the utility model.

[0023] Figure 4 This is a partial enlarged view of the lower edge of the horizontal installation of the utility model.

[0024] Figure 5 It is a schematic diagram of the lower frame structure of the utility model.

[0025] Figure 6 It is a three-dimensional schematic diagram of the lower frame of the utility model.

[0026] Figure 7 This is a structural comparison diagram of the lower frame of the utility model and the lower frame of the existing solar cell module. The dotted line part is a structural schematic diagram of the contact surface between the existing lower frame and the solar cell module.

[0027] Figure 8 Schematic diagram of rainwater accumulation at the bottom frame of existing components.

[0028] Fig. 9 It is a schematic diagram of rainwater accumulation on the lower frame of the component of the utility model.

[0029] Among them, 1. solar cell module; 101. upper surface of solar cell module; 2. upper frame; 3. lower frame; 301. side A of the lower frame in contact with the upper surface of solar cell module 1; 302. hydrophobic film; 4. left frame; 5. right frame; 6. sealant; 7. rainwater accumulation area. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0031] like Figure 1-6As shown, the utility model is a rainwater scouring and dust accumulation prevention component, comprising an upper frame 2, a lower frame 3, a solar cell assembly 1, a left frame 4, and a right frame 5. The solar cell assembly is fixed in a frame composed of the upper frame, the lower frame, the left frame, and the right frame by a sealant 6, and is characterized in that: the side A301 of the lower frame in contact with the upper surface of the solar cell assembly 1 is designed to be an arc surface, and the arc surface is higher at the bottom and lower at the top. Since the height difference of the side A301 of the lower frame in contact with the upper surface of the solar cell assembly 1 is reduced compared with the upper surface of the solar cell assembly 1 along the vertical direction of the glass surface, and at the same time, the curvature of the side A301 of the lower frame in contact with the upper surface of the solar cell assembly 1 is changed, it is more conducive to drainage, and greatly improves the occurrence of the "dammed lake" phenomenon.

[0032] A hydrophobic layer 302 is added to the side of the lower frame that contacts the upper surface of the solar cell module 1 A301. The falling raindrops slide down along the arc of the side of the lower frame that contacts the upper surface of the solar cell module A301 under the action of their own gravity, and cannot gather at the joint of the side of the lower frame that contacts the upper surface of the solar cell module A301 and the upper surface of the solar cell module, thereby fundamentally preventing the occurrence of the "dammed lake" phenomenon.

[0033] The hydrophobic layer 302 of the utility model is formed by electroplating metal nickel to form a hydrophobic metal coating. The hydrophobic metal coating has more inherent advantages in terms of wear resistance, fatigue resistance and bonding strength. The hydrophobic nickel coating with a micro-nano scale structure prepared on the surface of the substrate can effectively improve the surface hydrophobicity and form a hydrophobic corrosion-resistant nickel coating. Of course, a hydrophobic material layer can also be coated, using fluorine materials, silicon materials, composite materials of fluorine and silicon, perfluoroethylene propylene copolymer FEP, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene PTFE or fluorinated polyethylene coating.

[0034] The rainwater scouring and dust accumulation prevention component of the utility model adjusts the surface structure of the side A where the lower frame contacts the upper surface of the solar cell component, thereby reducing the height difference between the lower frame and the upper surface of the solar cell component in the vertical direction of the glass surface, and at the same time changes the curvature of the side A where the lower frame contacts the upper surface of the solar cell component, so that the falling raindrops slide down along the curvature of the side A where the lower frame contacts the upper surface of the solar cell component under the action of their own gravity, so that the rainwater gathered at the lower edge of the solar cell component can be discharged as soon as possible.

[0035] The rainwater scouring and dust accumulation prevention component of the utility model is installed in a horizontal manner, and the structure is as follows Figure 3 , Figure 4 , or the installation method of the rainwater scouring and dust prevention component of the utility model is to choose vertical installation, the structure is as follows Figure 1 , Figure 2 shown.

[0036] The lower frame structure of the existing assembly is compared with the lower frame structure of the utility model. Figure 7 As shown in the figure, the rainwater accumulation on the lower frame of the existing module is as follows Figure 8 As shown, the rainwater accumulation under the frame of the utility model assembly is as follows: Fig. 9 shown.

Claims

1. A rainwater scouring and dust accumulation prevention assembly, comprising an upper frame, a lower frame, a solar cell assembly, a left frame, and a right frame, wherein the solar cell assembly is fixed in a frame composed of the upper frame, the lower frame, the left frame, and the right frame, and characterized in that: A side A of the lower frame in contact with the upper surface of the solar cell assembly is designed to be an arc surface, and the arc surface is higher at the bottom and lower at the top.

2. A rainwater scouring and dust accumulation prevention component according to claim 1, characterized in that: A hydrophobic layer is added on one side A of the lower frame in contact with the upper surface of the solar cell assembly.

3. A rainwater scouring and dust accumulation prevention component according to claim 2, characterized in that: The hydrophobic layer is an electroplated hydrophobic metal coating or a coated hydrophobic material layer.

4. A rainwater scouring and dust accumulation prevention component according to claim 3, characterized in that: The hydrophobic material coating layer is formed by coating with fluorine material, silicon material, a composite material of fluorine and silicon, perfluoroethylene propylene copolymer FEP, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene PTFE or fluorinated polyethylene.

5. The rainwater scouring and dust accumulation prevention component according to claim 3, characterized in that: The electroplated hydrophobic metal coating is formed by electroplating metal nickel.

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