Photovoltaic module grinding and cleaning equipment and photovoltaic module grinding and cleaning method

Abstract

The invention relates to the technical field of photovoltaic module cleaning, and discloses photovoltaic module grinding and cleaning equipment and a photovoltaic module grinding and cleaning method.The photovoltaic module grinding and cleaning equipment comprises a polishing mechanism and a cleaning mechanism; the polishing mechanism comprises a first polishing assembly, a first nozzle and a polishing solution conveying assembly, the first nozzle is connected with the polishing solution conveying assembly, and the first polishing assembly is used for polishing, washing and grinding the light receiving surface of the photovoltaic module; and the cleaning mechanism is arranged at the rear end of the polishing mechanism and comprises a second nozzle, a scrubbing part and a cleaning liquid conveying assembly, the second nozzle is connected with the cleaning liquid conveying assembly and used for spraying cleaning liquid to the light receiving face of the photovoltaic module, and the scrubbing part is used for scrubbing the light receiving face of the photovoltaic module. The light receiving surface of the photovoltaic module is polished, washed and ground through the first polishing assembly of the polishing mechanism, then the photovoltaic module is fully cleaned through the cleaning mechanism, and the surface cleanliness and activity of the light receiving surface of the photovoltaic module can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module cleaning, and particularly to a grinding and cleaning device for photovoltaic modules and a grinding and cleaning method for photovoltaic modules. Background Art

[0002] Currently, the cleaning equipment for the glass surface of photovoltaic modules generally cleans by adding liquid cleaning agents.

[0003] However, neutral, weak alkaline or weak acidic cleaning agents have poor cleaning effects on the glass surface of photovoltaic modules that have undergone high-temperature process treatment. For example, for cadmium telluride modules, the activity of the glass surface (light-receiving surface) after cleaning is poor, resulting in easy peeling of the antireflection film (AR) after the antireflection film is deposited on the glass surface. If strong acidic or strong alkaline cleaning agents are used, there are problems of high cost and great harm to the environment. Moreover, the double-glass laminated cadmium telluride modules cannot withstand strong acid or strong alkaline cleaning and are easily damaged after cleaning. Summary of the Invention

[0004] In view of this, the present invention provides a grinding and cleaning device for photovoltaic modules and a grinding and cleaning method for photovoltaic modules to solve the problems that the existing cleaning equipment uses liquid cleaning agents to clean the surface glass of photovoltaic modules, resulting in poor cleaning effects or easy damage to photovoltaic modules.

[0005] In a first aspect, the present invention provides a grinding and cleaning device for photovoltaic modules, including:

[0006] A polishing mechanism, including a first polishing component, a first nozzle and a polishing liquid conveying component, the first nozzle is connected to the polishing liquid conveying component, the first nozzle is used for spraying polishing liquid onto the first polishing component, and the first polishing component is used for polishing and grinding the light-receiving surface of the photovoltaic module;

[0007] A cleaning mechanism, along the conveying direction of the photovoltaic module, the cleaning mechanism is arranged at the rear end of the polishing mechanism, the cleaning mechanism includes a second nozzle, a brushing member and a cleaning liquid conveying component, the second nozzle is connected to the cleaning liquid conveying component, the second nozzle is used for spraying cleaning liquid onto the light-receiving surface of the photovoltaic module, and the brushing member is used for brushing the light-receiving surface of the photovoltaic module.

[0008] Beneficial effects: First, the present invention sprays the polishing liquid onto the first polishing assembly through the first nozzle, and then uses the first polishing assembly of the polishing mechanism to wash and grind the light-receiving surface of the photovoltaic module to achieve the effect of deep cleaning. After that, the second nozzle of the cleaning mechanism is used to initially rinse the photovoltaic module and remove the residual polishing liquid on the photovoltaic module. Then, the brushing member is used to further brush the photovoltaic module to remove the polishing liquid and other impurities, avoiding the retention of the polishing liquid and impurities on the photovoltaic module, which can significantly improve the surface cleanliness and activity of the light-receiving surface of the photovoltaic module, facilitate ensuring the stable processing of the photovoltaic module, and reduce the risk of the anti-reflection film falling off. Moreover, by combining the polishing mechanism and the cleaning mechanism, the polishing liquid after being cleaned by the cleaning mechanism is recycled to the polishing mechanism for reuse, so the use cost can also be reduced.

[0009] In an optional embodiment, the polishing liquid conveying assembly includes a first tank and a second tank for storing the polishing liquid. The first tank is connected to the first nozzle. The concentration of the polishing liquid stored in the second tank is greater than that of the polishing liquid stored in the first tank. A polishing liquid concentration detector is provided in the first tank, and the first tank is connected to the second tank through a first switching pump.

[0010] Beneficial effects: The first tank stores the polishing liquid for continuously supplying the polishing liquid to the first nozzle. The polishing liquid after being cleaned by the cleaning mechanism is recycled to the first tank, which will reduce the concentration of the polishing liquid in the first tank. When the polishing liquid concentration detector detects that the concentration of the polishing liquid in the first tank is lower than the preset value, the high-concentration polishing liquid in the second tank is added to the first tank through the first switching pump, so as to ensure that the concentration of the polishing liquid in the first tank is above the preset value and meets the use requirements.

[0011] In an optional embodiment, the polishing liquid conveying assembly further includes a third tank for storing the polishing liquid. The first tank and the third tank store the polishing liquid with the same concentration. A first liquid level detector is further provided in the first tank, and the first tank is connected to the third tank through a second switching pump.

[0012] Beneficial effects: When the first liquid level detector detects that the liquid level in the first tank drops to a certain extent, the polishing liquid in the third tank is replenished into the first tank through the second switching pump. So that the remaining amount of the polishing liquid in the first tank is sufficient.

[0013] In an optional embodiment, stirrers are respectively provided in the first tank, the second tank and the third tank, and flexible bottom-supporting blades are fixedly provided on the impellers of the stirrers.

[0014] Beneficial effects: The stirrer is used to evenly stir the polishing powder in the first tank, the second tank, and the third tank. By fixedly installing flexible bottom-supporting blades on the impeller of the stirrer, the polishing powder settled at the bottom of the tank can be stirred and dispersed evenly.

[0015] In an optional embodiment, a first recovery tank is provided at the bottom of the first polishing assembly, and the first recovery tank is communicated with the first tank;

[0016] And / or, a second recovery tank is provided at the bottom of the second nozzle, and the second recovery tank is communicated with the first tank.

[0017] Beneficial effects: By providing a first recovery tank at the bottom of the first polishing assembly, the residual polishing liquid ejected from the first nozzle can be recovered into the first tank, so as to improve the utilization rate of the polishing liquid and reduce the use cost. By providing a second recovery tank at the bottom of the second nozzle, the polishing liquid brushed down by the second nozzle can be recovered into the first tank, so as to further improve the utilization rate of the polishing liquid and reduce the use cost.

[0018] In an optional embodiment, the cleaning mechanism further includes a second polishing assembly. Along the conveying direction of the photovoltaic module, the second polishing assembly is arranged at the rear end of the brushing member and is used for reciprocatingly brushing the opposite side of the light-receiving surface of the photovoltaic module along the direction perpendicular to the conveying direction of the photovoltaic module.

[0019] Beneficial effects: The second polishing assembly can reciprocatingly brush the opposite side of the light-receiving surface of the photovoltaic module along the direction perpendicular to the conveying direction of the photovoltaic module, improve the surface cleanliness of the other side of the photovoltaic module, and prevent the polishing liquid from remaining on the photovoltaic module.

[0020] In an optional embodiment, the cleaning mechanism further includes a third polishing assembly. Along the conveying direction of the photovoltaic module, the third polishing assembly is arranged at the rear end of the second polishing assembly and is used for brushing the opposite sides of the photovoltaic module along the conveying direction of the photovoltaic module.

[0021] Beneficial effects: The third polishing assembly can brush the opposite sides of the photovoltaic module along the conveying direction of the photovoltaic module, further improve the surface cleanliness of the opposite sides of the photovoltaic module, and prevent the polishing liquid from remaining on the photovoltaic module.

[0022] In an optional embodiment, a drying mechanism and an antistatic mechanism are further included. Along the conveying direction of the photovoltaic module, the drying mechanism is arranged at the rear end of the third polishing assembly, and the antistatic mechanism is arranged at the rear end of the drying mechanism.

[0023] Beneficial effects: The drying mechanism can dry the residual liquid on the photovoltaic module, and the antistatic mechanism can effectively eliminate the static electricity on the photovoltaic module.

[0024] In an alternative embodiment, it further includes:

[0025] A first isolation roller, which is arranged between the first polishing assembly and the second nozzle, and is used for scraping the polishing liquid on the photovoltaic module and isolating the first polishing assembly and the second nozzle;

[0026] A second isolation roller, which is arranged between the second nozzle and the brushing member, and is used for further scraping the polishing liquid and cleaning liquid on the photovoltaic module and isolating the second nozzle and the brushing member.

[0027] Beneficial effects: After the photovoltaic module passes through the first isolation roller, the polishing liquid is first scraped off by the first isolation roller, and then sprayed through the second nozzle, which is beneficial to quickly remove the polishing liquid on the photovoltaic module. At the same time, the first isolation roller can isolate the first polishing assembly and the second nozzle, preventing the cleaning agent sprayed by the second nozzle from entering the first polishing assembly and affecting the polishing and grinding of the photovoltaic module by the first polishing assembly. Similarly, the second isolation roller can further scrape the polishing liquid and cleaning liquid on the photovoltaic module after spraying, and at the same time prevent the second nozzle from affecting the operation of the brushing member.

[0028] In a second aspect, the present invention further provides a method for grinding and cleaning a photovoltaic module, including:

[0029] Convey the photovoltaic module to the polishing mechanism with the light-receiving surface of the photovoltaic module facing upward;

[0030] Use the first nozzle to spray the polishing liquid in the polishing liquid conveying assembly onto the first polishing assembly, and control the first polishing assembly to perform polishing, washing and grinding on the light-receiving surface of the photovoltaic module;

[0031] Convey the photovoltaic module to the cleaning mechanism with the light-receiving surface of the photovoltaic module facing upward;

[0032] Use the second nozzle to spray the cleaning liquid onto the light-receiving surface of the photovoltaic module to perform a preliminary spray rinse on the polishing liquid on the photovoltaic module;

[0033] Use the brushing member to brush the light-receiving surface of the photovoltaic module to further brush and remove the polishing liquid and other impurities on the photovoltaic module.

[0034] Beneficial effects: The present invention sprays a polishing liquid onto the first polishing assembly through the first nozzle, and then uses the first polishing assembly of the polishing mechanism to perform polishing, washing, and grinding on the light-receiving surface of the photovoltaic module, achieving the effect of deep cleaning. The second nozzle of the cleaning mechanism is used to perform preliminary rinsing on the photovoltaic module and remove the residual polishing liquid on the photovoltaic module. Then, the brushing member is further used to brush the photovoltaic module to remove the polishing liquid and other impurities, preventing the polishing liquid and impurities from remaining on the photovoltaic module, which can significantly improve the surface cleanliness and activity of the light-receiving surface of the photovoltaic module, facilitating the stable processing of the photovoltaic module and reducing the risk of the anti-reflection film falling off. Moreover, by combining the polishing mechanism and the cleaning mechanism, the polishing liquid after being cleaned by the cleaning mechanism is recycled to the polishing mechanism for reuse, thus reducing the usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a top view of a photovoltaic module grinding and cleaning device according to an embodiment of the present invention;

[0037] Figure 2 It is a front view of a photovoltaic module grinding and cleaning device according to an embodiment of the present invention;

[0038] Figure 3 It is a side view of a photovoltaic module grinding and cleaning device according to an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of a polishing liquid conveying assembly of a photovoltaic module grinding and cleaning device according to an embodiment of the present invention.

[0040] Description of the reference numerals:

[0041] 1. Polishing mechanism; 101. First polishing assembly; 2. Cleaning mechanism; 201. Second nozzle; 202. Brushing member; 203. Second polishing assembly; 204. Third polishing assembly; 2041. Detergent brush roller; 2042. Air knife; 2043. Pure water brush roller; 2044. Spraying assembly; 3. Polishing liquid conveying assembly; 301. First tank; 302. Second tank; 303. Third tank; 304. First switching pump; 305. Second switching pump; 306. Stirrer; 307. Make-up water valve; 308. Return valve; 309. Driving pump; 4. Drying mechanism; 5. Static elimination mechanism; 6. First isolation roller; 7. Second isolation roller; 8. Conveying mechanism. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] The following combines Figures 1 to 4 , and describes the embodiments of the present invention.

[0044] According to an embodiment of the present invention, on the one hand, as Figure 1 shown, a grinding and cleaning device for photovoltaic modules is provided, mainly including: a polishing mechanism 1 and a cleaning mechanism 2. The polishing mechanism 1 includes a first polishing assembly 101, a first nozzle, and a polishing liquid conveying assembly 3. The first nozzle is connected to the polishing liquid conveying assembly 3, and the first nozzle is used to spray polishing liquid onto the first polishing assembly 101. The first polishing assembly 101 is used to perform polishing, washing, and grinding on the light-receiving surface of the photovoltaic module. Along the conveying direction of the photovoltaic module, the cleaning mechanism 2 is arranged at the rear end of the polishing mechanism 1. The cleaning mechanism 2 includes a second nozzle 201, a brushing member 202, and a cleaning liquid conveying assembly. The second nozzle 201 is connected to the cleaning liquid conveying assembly, and the second nozzle 201 is used to spray cleaning liquid onto the light-receiving surface of the photovoltaic module. The brushing member 202 is used to brush the light-receiving surface of the photovoltaic module.

[0045] The grinding and cleaning device for photovoltaic modules provided by the embodiments of the present invention first sprays polishing liquid onto the first polishing assembly 101 through the first nozzle, and then uses the first polishing assembly 101 of the polishing mechanism 1 to perform polishing, washing, and grinding on the light-receiving surface of the photovoltaic module to achieve the effect of deep cleaning. After that, the second nozzle 201 of the cleaning mechanism 2 is used to perform a preliminary rinse on the photovoltaic module and remove the residual polishing liquid on the photovoltaic module. Then, the brushing member 202 is used to further brush the photovoltaic module to remove the polishing liquid, organic substances, and other impurities, avoiding the retention of the polishing liquid and impurities on the photovoltaic module, which can significantly improve the surface cleanliness and activity of the light-receiving surface of the photovoltaic module, facilitate ensuring the stable processing of the photovoltaic module, and reduce the risk of the antireflection film falling off.

[0046] Moreover, in the embodiments of the present invention, the polishing mechanism 1 and the cleaning mechanism 2 are used in combination, and the polishing liquid after being cleaned by the cleaning mechanism 2 is recycled to the polishing mechanism 1 for repeated use. Compared with the structure in which polishing and cleaning are arranged independently, the device can also reduce the occupied space of the device and lower the usage cost.

[0047] Specifically, the photovoltaic modules are generally automatically and continuously conveyed by a conveying mechanism 8, and the light-receiving surface of the photovoltaic modules faces upward. The conveying mechanism 8 can be any existing structure as needed, such as a conveyor belt, conveying rollers, etc., and the conveying speed is 1 m / min to 60 m / min. The light-receiving surface of the photovoltaic module is the glass surface, and an antireflection film needs to be deposited after the glass surface is cleaned. The conveying direction of the photovoltaic module is as shown by the arrow in Figure 1 When the photovoltaic module is conveyed to the polishing mechanism 1, the first polishing assembly 101 is located above the photovoltaic module. The polishing liquid is pumped to the first nozzle by a driving pump 309. The first nozzle sprays the polishing liquid onto the first polishing assembly 101, and the first polishing assembly 101 cooperates with the polishing liquid to polish and grind the light-receiving surface of the photovoltaic module. At this time, part of the polishing liquid will be adsorbed on the surface of the photovoltaic module to form secondary pollution. Therefore, in the embodiment of the present invention, a cleaning mechanism 2 is provided at the rear end of the polishing mechanism 1, and the cleaning mechanism 2 cleans the polishing liquid on the photovoltaic module.

[0048] It should be noted that the polishing liquid is mainly composed of water and polishing powder. The polishing powder is dispersed in water to form a suspension, and a suspending agent, a detergent or other additives can be selected according to actual needs. The polishing powder needs to be a substance with a hardness close to or greater than the surface glass of the photovoltaic module, such as at least one of cerium oxide, zirconium oxide, silicon oxide, aluminum oxide, silicon carbide, magnesium oxide, diamond, etc. The particle size of the polishing powder needs to meet 0.1 um to 100 um, and one particle size or multiple particle sizes can be selected according to needs. The concentration of the polishing liquid is 0.1% to 60%, such as 0.1%, 10%, 20%, 40%, 60%, etc. The flow rate of the polishing liquid is 1 L / min to 200 L / min.

[0049] In addition, the cleaning liquid of the cleaning liquid conveying component can be selected as water, which is easy to clean the photovoltaic module. Water does not react with the polishing powder, will not contaminate the polishing liquid, and is also conducive to the recovery of the polishing liquid.

[0050] In one embodiment, the first polishing assembly 101 includes a plurality of brush rollers arranged side by side. The rotation speed of the brush rollers is 10 Hz to 300 Hz. The brush rollers rotate and press down on the photovoltaic module to achieve polishing and grinding of the photovoltaic module. The pressing depth of the brush rollers is 0.1 mm to 20 mm. The wire diameter of the brush rollers is 0.001 mm to 10 mm. By controlling the rotation speed, pressing degree, material, wire diameter of the brush rollers, and the conveying speed of the conveying mechanism 8, the concentration and flow rate of the polishing liquid, the particle size and type of the polishing powder and other factors, the grinding degree is controlled. The specific settings need to be selected according to the actual process of the photovoltaic module, and the embodiments of the present invention do not limit this too much.

[0051] Exemplarily, the polishing liquid powder is cerium oxide with a particle size of 10 um, the concentration of the polishing liquid is 10%, the polishing liquid is added with an anti-settling suspension dispersant and a glass cleaner, and the flow rate of the polishing liquid is 10 L / min. The conveying speed of the conveying mechanism 8 is 10 m / min. The roller brush is a wool brush with a rotation speed of 50 Hz. The pressing depth of the roller brush is 1 mm. The wire diameter of the roller brush is 0.1 mm.

[0052] In one embodiment, the scrubbing member 202 can be a basin brush, which has a simple structure and is convenient for scrubbing. Of course, in some other embodiments, the scrubbing member 202 can also be selected from other common scrubbing tools according to needs.

[0053] In one embodiment, as Figure 1 、 Figure 3 and Figure 4 shown, the polishing liquid delivery assembly 3 includes a first tank 301 and a second tank 302 for storing the polishing liquid. The first tank 301 is connected to a first nozzle. The concentration of the polishing liquid stored in the second tank 302 is greater than the concentration of the polishing liquid stored in the first tank 301. A polishing liquid concentration detector is provided in the first tank 301. The first tank 301 is connected to the second tank 302 through a first switching pump 304.

[0054] The first tank 301 stores the polishing liquid for continuously supplying the polishing liquid to the first nozzle. The polishing liquid recovered by the cleaning mechanism 2 is returned to the first tank 301, which will reduce the concentration of the polishing liquid in the first tank 301. When the polishing liquid concentration detector detects that the concentration of the polishing liquid in the first tank 301 is lower than the first concentration preset value, the high-concentration polishing liquid in the second tank 302 is added to the first tank 301 through the first switching pump 304 to increase the concentration of the polishing liquid. When the polishing liquid concentration detector detects that the concentration of the polishing liquid in the first tank 301 exceeds the second concentration preset value, the first switching pump 304 is turned off, so as to ensure that the concentration of the polishing liquid in the first tank 301 is within the preset range and meets the use requirements.

[0055] In addition, as Figure 4 shown, the first tank 301 can also be connected to a water replenishing valve 307 to add water for dilution when the concentration of the polishing liquid in the first tank 301 is higher than the maximum concentration preset value.

[0056] Furthermore, in one embodiment, as Figure 1 and Figure 4As shown, the polishing liquid delivery assembly 3 further includes a third tank 303 for storing the polishing liquid. The first tank 301 and the third tank 303 store the polishing liquid with the same concentration. A first liquid level detector is also provided in the first tank 301. The first tank 301 is connected to the third tank 303 through a second on-off pump 305. When the first liquid level detector detects that the liquid level in the first tank 301 drops to a certain extent, the polishing liquid in the third tank 303 is replenished into the first tank 301 through the second on-off pump 305, so that the surplus of the polishing liquid in the first tank 301 is sufficient.

[0057] Specifically, the first tank 301 is preset with a maximum liquid level and a minimum liquid level. When the first liquid level detector detects that the liquid level in the first tank 301 drops to the minimum liquid level, the second on-off pump 305 is controlled to start, and the polishing liquid in the third tank 303 is replenished into the first tank 301. When the liquid level in the first tank 301 rises to the maximum liquid level, the second on-off pump 305 is controlled to close.

[0058] Furthermore, a second liquid level detector is also provided in the second tank 302, and a third liquid level detector is also provided in the third tank 303. The first liquid level detector, the second liquid level detector, and the third liquid level detector respectively have a low-level alarm function. For example, when the liquid level in the first tank 301 is lower than the minimum liquid level, an alarm is given to remind the operator to add the polishing liquid into the first tank 301 in time, ensuring the long-term stable operation of the photovoltaic module grinding and cleaning equipment. Thus, the concentration and surplus of the polishing liquid in the first tank 301 can be monitored and controlled in real time, which is beneficial to the stable operation of the large-scale continuous cleaning operation of photovoltaic modules.

[0059] In one embodiment, as Figure 4 shown, stirrers 306 are respectively provided in the first tank 301, the second tank 302, and the third tank 303. At least part of the impellers of the stirrers 306 are arranged at the bottom of the tanks. Flexible bottom-supporting blades are fixedly provided on the impellers of the stirrers 306, and the flexible bottom-supporting blades are located at the bottom of the tanks. The stirrers 306 are used to stir the polishing powder in the first tank 301, the second tank 302, and the third tank 303 evenly. By fixedly providing the flexible bottom-supporting blades on the impellers of the stirrers 306, the polishing powder settled at the bottom of the tank can be stirred and dispersed evenly.

[0060] In one embodiment, a first recovery tank is provided at the bottom of the first polishing assembly 101, and the first recovery tank is communicated with the first tank 301. During the process that the first nozzle sprays the polishing liquid on the first polishing assembly 101 and the first polishing assembly 101 polishes and grinds the photovoltaic module, the residual polishing liquid flows into the lower first recovery tank under its own weight. By providing the first recovery tank at the bottom of the first polishing assembly 101, the residual polishing liquid sprayed by the first nozzle can be recovered into the first tank 301, so as to improve the utilization rate of the polishing liquid and reduce the use cost.

[0061] In one embodiment, a second recovery tank is provided at the bottom of the second nozzle 201, and the second recovery tank is communicated with the first tank body 301. Similarly, by providing a second recovery tank at the bottom of the second nozzle 201, the polishing liquid brushed off by the second nozzle 201 can be recovered into the first tank body 301, so as to further improve the utilization rate of the polishing liquid and reduce the use cost.

[0062] Further, in one embodiment, the first recovery tank and the second recovery tank can also be communicated with each other and are communicated with the first tank body 301 through a reflux valve 308. Whether to open the reflux valve 308 is selected according to actual needs. For example, when the liquid level height in the first tank body 301 is close to the maximum liquid level, the reflux valve 308 is closed to avoid the liquid level in the first tank body 301 from being too high.

[0063] In one embodiment, as Figure 1 and Figure 2 shown, the cleaning mechanism 2 further includes a second polishing component 203. Along the conveying direction of the photovoltaic module, the second polishing component 203 is arranged at the rear end of the brushing member 202 and is used for reciprocatingly brushing the opposite side of the light-receiving surface of the photovoltaic module along the direction perpendicular to the conveying direction of the photovoltaic module. The second polishing component 203 can reciprocatingly brush the opposite side of the light-receiving surface of the photovoltaic module along the direction perpendicular to the conveying direction of the photovoltaic module, improve the surface cleanliness of the other side of the photovoltaic module, and avoid polishing liquid remaining on the photovoltaic module.

[0064] When the light-receiving surface of the photovoltaic module faces, the second polishing component 203 is used to brush the lower surface of the photovoltaic module. At this time, positions such as the junction box of the photovoltaic module need to be avoided so as not to damage the photovoltaic module.

[0065] Specifically, the second polishing component 203 includes a reciprocating roller brush and a transverse movement mechanism. The reciprocating roller brush is arranged on the transverse movement mechanism. In the horizontal direction, the transverse movement mechanism drives the reciprocating roller brush to move along the direction perpendicular to the conveying direction of the photovoltaic module to realize reciprocating transverse brushing of the photovoltaic module.

[0066] In one embodiment, as Figure 1 shown, the cleaning mechanism 2 further includes a third polishing component 204. Along the conveying direction of the photovoltaic module, the third polishing component 204 is arranged at the rear end of the second polishing component 203 and is used for brushing the opposite sides of the photovoltaic module along the conveying direction of the photovoltaic module. The third polishing component 204 can brush the opposite sides of the photovoltaic module along the conveying direction of the photovoltaic module to further improve the surface cleanliness of the opposite sides of the photovoltaic module and avoid polishing liquid remaining on the photovoltaic module.

[0067] Further, in one embodiment, as Figure 2As shown in the figure, along the conveying direction of the photovoltaic module, the third polishing assembly 204 sequentially includes a cleaning lotion roller brush 2041, an air knife 2042, a pure water roller brush 2043, and a spraying assembly 2044. The spraying assembly 2044 includes a three-stage spraying wash and a final-stage spraying wash, and is used to spray and clean the photovoltaic module. A glass cleaning agent is sprayed on the cleaning lotion roller brush 2041. The upper and lower surfaces of the photovoltaic module are cleaned with the cleaning lotion by the cleaning lotion roller brush 2041. The photovoltaic module is dried by the air knife 2042 to remove the cleaning lotion, and the upper and lower surfaces of the photovoltaic module are scrubbed by the pure water roller brush 2043. Finally, the upper and lower surfaces of the photovoltaic module are spray-scrubbed by the spraying assembly 2044.

[0068] Further, the present invention can clean multiple photovoltaic modules simultaneously. The pure water roller brush 2043 is also connected to the spraying assembly 2044. The pure water is first conveyed to the spraying assembly 2044, and after use, it is recycled to the pure water roller brush 2043 to scrub the previous photovoltaic module, so as to save water resources and reduce the use cost.

[0069] In one embodiment, as Figure 1 and Figure 2 shown, the photovoltaic module grinding and cleaning equipment further includes a drying mechanism 4 and an antistatic mechanism 5. Along the conveying direction of the photovoltaic module, the drying mechanism 4 is arranged at the rear end of the third polishing assembly 204, and the antistatic mechanism 5 is arranged at the rear end of the drying mechanism 4. The drying mechanism 4 can dry the residual liquid on the photovoltaic module, and the antistatic mechanism 5 can effectively eliminate the static electricity on the photovoltaic module.

[0070] It should be noted that the specific structures of the drying mechanism 4 and the antistatic mechanism 5 in the embodiments of the present invention are not limited, and any existing structure can be selected according to needs. For example, along the conveying direction of the photovoltaic module, the drying mechanism 4 includes multiple groups of air knives and hot air knives. First, the photovoltaic module is preliminarily dried by multiple ordinary air knives, and then further dried by the hot air knife to remove the moisture remaining on the surface of the photovoltaic module after spraying. The antistatic mechanism 5 can adopt an ion blower, and the ion blower is arranged at the rear end of the hot air knife.

[0071] In one embodiment, as Figure 1 and Figure 2 shown, the photovoltaic module grinding and cleaning equipment further includes a first isolation roller 6 and a second isolation roller 7. The first isolation roller 6 is arranged between the first polishing assembly 101 and the second nozzle 201, and is used to scrape off the polishing liquid on the photovoltaic module and isolate the first polishing assembly 101 and the second nozzle 201. The second isolation roller 7 is arranged between the second nozzle 201 and the brushing member 202, and is used to further scrape off the polishing liquid and cleaning liquid on the photovoltaic module and isolate the second nozzle 201 and the brushing member 202. Specifically, the first isolation roller 6 and the second isolation roller 7 can adopt wool rollers.

[0072] After the photovoltaic module passes through the first isolation roller 6, the polishing liquid is first scraped off by the first isolation roller 6, and then sprayed through the second nozzle 201, which is beneficial to quickly remove the polishing liquid on the photovoltaic module. At the same time, the first isolation roller 6 can isolate the first polishing assembly 101 from the second nozzle 201, preventing the cleaning agent sprayed by the second nozzle 201 from entering the first polishing assembly 101 and affecting the polishing and grinding of the photovoltaic module by the first polishing assembly 101. Similarly, the second isolation roller 7 can further scrape off the polishing liquid and cleaning liquid on the photovoltaic module after spraying, and at the same time prevent the second nozzle 201 from affecting the operation of the brushing member 202.

[0073] It should be noted that the embodiments of the present invention do not limit the materials of the above-mentioned roller brushes and disk brushes, and conventional existing materials can be selected according to needs, including but not limited to animal brushes such as wool brushes and pig hair brushes, or brush products with a hardness lower than the surface glass of the photovoltaic module such as sponge brushes, nylon brushes, linen brushes, cotton brushes, and polyurethane brushes.

[0074] To implement the basic functions of the photovoltaic module grinding and cleaning equipment, the photovoltaic module grinding and cleaning equipment in this embodiment may further include other necessary modules or components, such as a housing, a control system, etc. It should be noted that the other necessary modules or components included in the photovoltaic module grinding and cleaning equipment can be selected from any suitable existing structures. For the sake of clearly and briefly describing the technical solutions provided in this embodiment, the above parts will not be elaborated herein, and the accompanying drawings of the specification have also been correspondingly simplified. However, it should be understood that the scope of the embodiments of the present invention is not limited thereby.

[0075] According to an embodiment of the present invention, on the other hand, a method for grinding and cleaning a photovoltaic module is also provided, including:

[0076] S100. Transport the photovoltaic module to the polishing mechanism 1 with the light-receiving surface of the photovoltaic module facing upward.

[0077] S200. Spray the polishing liquid in the polishing liquid delivery assembly 3 onto the first polishing assembly 101 using the first nozzle, and control the first polishing assembly 101 to perform polishing and grinding on the light-receiving surface of the photovoltaic module.

[0078] S300. Transport the photovoltaic module to the cleaning mechanism 2 with the light-receiving surface of the photovoltaic module facing upward.

[0079] S400. Spray the cleaning liquid onto the light-receiving surface of the photovoltaic module using the second nozzle 201 to perform preliminary spray rinsing on the polishing liquid on the photovoltaic module.

[0080] S500. Brush the light-receiving surface of the photovoltaic module using the brushing member 202 to further brush and remove the polishing liquid and other impurities on the photovoltaic module.

[0081] The photovoltaic module grinding and cleaning method provided by the embodiment of the present invention sprays a polishing liquid onto the first polishing assembly 101 of the polishing mechanism 1 through a first nozzle, and then uses the first polishing assembly 101 of the polishing mechanism 1 to perform polishing, washing and grinding on the light-receiving surface of the photovoltaic module to achieve the effect of deep cleaning. The second nozzle 201 of the cleaning mechanism 2 is used to perform preliminary flushing on the photovoltaic module and remove the residual polishing liquid on the photovoltaic module. Then, the brushing member 202 is used to further brush the photovoltaic module to remove the polishing liquid and other impurities, avoiding the retention of the polishing liquid and impurities on the photovoltaic module, which can significantly improve the surface cleanliness and activity of the light-receiving surface of the photovoltaic module, facilitate ensuring the stable processing of the photovoltaic module, and reduce the risk of the antireflection film falling off. Moreover, by combining the polishing mechanism 1 and the cleaning mechanism 2 and recycling the polishing liquid after cleaning by the cleaning mechanism 2 to the polishing mechanism 1 for reuse, the use cost can also be reduced.

[0082] In one embodiment, after step S500, the method further includes:

[0083] S600. Use the second polishing assembly 203 to reciprocally brush the opposite side of the light-receiving surface of the photovoltaic module perpendicular to the conveying direction of the photovoltaic module.

[0084] S700. Use the third polishing assembly 204 to brush the opposite sides of the photovoltaic module along the conveying direction of the photovoltaic module.

[0085] S800. Use the drying mechanism 4 to dry the photovoltaic module.

[0086] S900. Use the static elimination mechanism 5 to eliminate the static electricity on the photovoltaic module.

[0087] By using the photovoltaic module grinding and cleaning method provided by the embodiment of the present invention, the hydrophilicity of the surface glass of the photovoltaic module can be improved from the water droplet diameter of about 5 mm (hydrophilic angle of 50°) before cleaning to the water droplet diameter of about 30 mm (hydrophilic angle of 15°). The polishing and grinding can not only remove the inert ion layer adsorbed on the glass surface of the photovoltaic module due to high temperature, but also form abundant Si-O (silicon oxide) broken bonds, greatly improving the surface cleanliness and activity of the photovoltaic module glass. When an antireflection thin film (AR) is deposited on the photovoltaic module, the AR does not delaminate for a long time, which is beneficial to improving the subsequent stable processing of the photovoltaic module, thereby extending the service life of the photovoltaic module.

[0088] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A grinding and cleaning device for photovoltaic modules, characterized in that, Comprising: A polishing mechanism (1), including a first polishing assembly (101), a first nozzle, and a polishing liquid delivery assembly (3). The first nozzle is connected to the polishing liquid delivery assembly (3), and the first nozzle is used to spray polishing liquid onto the first polishing assembly (101). The first polishing assembly (101) is used to perform polishing, washing, and grinding on the light-receiving surface of the photovoltaic module. A cleaning mechanism (2). Along the conveying direction of the photovoltaic module, the cleaning mechanism (2) is arranged at the rear end of the polishing mechanism (1). The cleaning mechanism (2) includes a second nozzle (201), a brushing member (202), and a cleaning liquid delivery assembly. The second nozzle (201) is connected to the cleaning liquid delivery assembly, and the second nozzle (201) is used to spray cleaning liquid onto the light-receiving surface of the photovoltaic module. The brushing member (202) is used to brush the light-receiving surface of the photovoltaic module.

2. The photovoltaic module grinding and cleaning equipment according to claim 1, characterized in that, The polishing liquid delivery assembly (3) includes a first tank body (301) and a second tank body (302) for storing polishing liquid. The first tank body (301) is connected to the first nozzle. The concentration of the polishing liquid stored in the second tank body (302) is greater than the concentration of the polishing liquid stored in the first tank body (301). A polishing liquid concentration detector is arranged in the first tank body (301). The first tank body (301) is connected to the second tank body (302) through a first switching pump (304).

3. The grinding and cleaning equipment for photovoltaic modules according to claim 2, characterized in that, The polishing liquid delivery assembly (3) further includes a third tank body (303) for storing polishing liquid. The polishing liquid stored in the first tank body (301) and the third tank body (303) has the same concentration. A first liquid level detector is further arranged in the first tank body (301). The first tank body (301) is connected to the third tank body (303) through a second switching pump (305).

4. The grinding and cleaning equipment for photovoltaic modules according to claim 3, wherein, Agitators (306) are respectively arranged in the first tank body (301), the second tank body (302), and the third tank body (303). Flexible bottom-supporting blades are fixedly arranged on the impellers of the agitators (306).

5. The grinding and cleaning equipment for photovoltaic modules according to claim 2, wherein, A first recovery tank is arranged at the bottom of the first polishing assembly (101), and the first recovery tank is communicated with the first tank body (301). And / or, a second recovery tank is arranged at the bottom of the second nozzle (201), and the second recovery tank is communicated with the first tank body (301).

6. The grinding and cleaning equipment for photovoltaic modules according to any one of claims 1 to 5, characterized in that, The cleaning mechanism (2) further includes a second polishing assembly (203). Along the conveying direction of the photovoltaic module, the second polishing assembly (203) is arranged at the rear end of the brushing member (202) and is used to reciprocally brush the opposite side of the light-receiving surface of the photovoltaic module perpendicular to the conveying direction of the photovoltaic module.

7. The grinding and cleaning equipment for photovoltaic modules according to claim 6, wherein, The cleaning mechanism (2) further includes a third polishing assembly (204). Along the conveying direction of the photovoltaic module, the third polishing assembly (204) is arranged at the rear end of the second polishing assembly (203) and is used to brush the opposite two sides of the photovoltaic module along the conveying direction of the photovoltaic module.

8. The grinding and cleaning equipment for photovoltaic modules according to claim 7, characterized in that, It further includes a drying mechanism (4) and an antistatic mechanism (5). Along the conveying direction of the photovoltaic module, the drying mechanism (4) is arranged at the rear end of the third polishing component (204), and the antistatic mechanism (5) is arranged at the rear end of the drying mechanism (4).

9. The grinding and cleaning equipment for a photovoltaic module according to any one of claims 1 to 5, characterized in that, It further includes: A first isolation roller (6), which is arranged between the first polishing component (101) and the second nozzle (201), and is used for scraping the polishing liquid on the photovoltaic module and isolating the first polishing component (101) and the second nozzle (201); A second isolation roller (7), which is arranged between the second nozzle (201) and the brushing member (202), and is used for further scraping the polishing liquid and cleaning liquid on the photovoltaic module and isolating the second nozzle (201) and the brushing member (202).

10. A grinding and cleaning method for a photovoltaic module, characterized in that, It includes: Convey the photovoltaic module to the polishing mechanism (1) with the light-receiving surface of the photovoltaic module facing upward; Use the first nozzle to spray the polishing liquid in the polishing liquid conveying component (3) onto the first polishing component (101), and control the first polishing component (101) to perform polishing, washing and grinding on the light-receiving surface of the photovoltaic module; Convey the photovoltaic module to the cleaning mechanism (2) with the light-receiving surface of the photovoltaic module facing upward; Use the second nozzle (201) to spray the cleaning liquid onto the light-receiving surface of the photovoltaic module to perform preliminary spraying and rinsing on the polishing liquid on the photovoltaic module; Use the brushing member (202) to brush the light-receiving surface of the photovoltaic module to further brush and remove the polishing liquid and other impurities on the photovoltaic module.

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