Solar photovoltaic module self-cleaning device and cleaning method

Abstract

The invention relates to the technical field of photovoltaic module cleaning, in particular to a solar photovoltaic module self-cleaning device and method. The solar photovoltaic module self-cleaning device comprises a movable cabin and a separated scrubbing machine; the separated scrubbing machine comprises a water tank, a towel wheel system is arranged in the center of the bottom of the water tank, the towel wheel system comprises two inner side plates, a rolling towel is arranged between the two inner side plates, a spraying system is arranged at the position, located on one side of the rolling towel, of the bottom of the water tank, and lifting resistance wheel sets are installed on the inner side plates. According to the technical scheme, the photovoltaic panel cleaning device has the beneficial effects that a rolling towel is wetted through a spraying system, then the rolling towel is driven to move and climb along the surface of a photovoltaic panel, and meanwhile stains on the surface of the photovoltaic panel are wiped, so that the effect of greatly reducing the water demand is achieved, and then the rolling towel is jacked up through a lifting resistance wheel set; the machine body is driven to descend slowly by the gravity of the machine body, and water stains on the surface of the photovoltaic panel are scraped, so that the effect of reducing extra energy consumption is achieved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module cleaning technology, specifically to a self-cleaning device and cleaning method for solar photovoltaic modules. Background Technology

[0002] Self-cleaning devices for solar photovoltaic modules are an innovative technology used to improve the performance of photovoltaic modules. With the popularization and use of solar photovoltaic systems, the surface of photovoltaic modules is prone to dust, dirt or other contaminants. These contaminants will greatly reduce the power generation efficiency of photovoltaic modules. Therefore, developing efficient self-cleaning devices has become an important direction for improving the efficiency of photovoltaic power generation systems. In terms of cleaning effectiveness, current water-washing self-cleaning systems are generally more effective than non-water-washing systems because water can soften and wash away the adhering substances on the surface of photovoltaic modules, while mechanical brushes and air are difficult to completely remove them, resulting in a decrease in the power generation efficiency of photovoltaic modules. However, in order to reduce the occupation of production land, most existing solar photovoltaic modules are set up on undeveloped wasteland or industrial wasteland where no crops are grown. Such land is far from densely populated areas, and the water supply capacity of urban water networks to such areas is limited, which may not be able to meet the large water demand of water-washing self-cleaning systems. Therefore, existing water-washing self-cleaning systems for solar photovoltaic modules still face the problem of insufficient water supply. On the other hand, while water-washing self-cleaning systems have strong cleaning capabilities, they are prone to leaving water stains during the cleaning process, especially in areas using hard water or poor water quality. Water stains are usually formed because minerals in the water are deposited on the surface during evaporation, forming a layer of white scale or water stains. This not only affects the appearance but may also reduce the efficiency of the photovoltaic panels. In order to solve the water stain problem, it is often necessary to set up a wiping device to wipe the water stains. Traditional wiping devices rely entirely on electricity to move on the surface of photovoltaic modules, which may lead to additional energy consumption. This additional energy consumption may partially offset the increase in power generation efficiency brought about by cleaning, thereby affecting the overall economic efficiency.

[0003] Therefore, it is necessary to invent a self-cleaning device and cleaning method for solar photovoltaic modules. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning device for solar photovoltaic modules, comprising a mobile cabin and a detachable scrubbing machine; The mobile cockpit includes a crossbeam, a fixing clamp is installed on the top of the crossbeam, the fixing clamp is fixedly installed on the photovoltaic panel bracket of the solar photovoltaic module, a slide is slidably installed on the crossbeam, a first central control cabin is installed on one side of the slide, a first power supply, a first circuit board and a first relay are installed in the first central control cabin, and a folding cabin body is installed on the other side of the slide, the folding cabin body includes the cockpit. The detachable scrubbing machine includes a water tank inserted into the cabin. A towel wheel system is located at the center of the bottom of the water tank. The towel wheel system includes two inner side plates, with a rolling towel placed between the two inner side plates. A spray system is located on one side of the bottom of the water tank, near the rolling towel, and a wastewater scraper is installed on the other side. An outer side plate is installed on the outer side of the inner side plates, and a lifting resistance wheel assembly is installed between the outer side plate and the inner side plate. The lifting resistance wheel assembly includes an L-shaped lever, with several damping wheels rotatably mounted on the lower end of the L-shaped lever, and a water stain removal component is installed on the front end of the L-shaped lever.

[0005] Preferably, the towel wheel system includes drive rollers, three sets of drive rollers are rotatably mounted between two inner side plates, waterproof rubber is sleeved on the outer wall of the three sets of drive rollers, the rolling towel is adhesively mounted on the surface of the waterproof rubber, and a drive motor is mounted on one end of the drive roller.

[0006] Preferably, the lifting resistance wheel assembly includes a hydraulic rod, which is fixedly installed on the surface of the inner side plate. The lower output end of the hydraulic rod is fixedly connected to the upper end of the L-shaped lever. A damping film is provided at the bottom of the upper end of the L-shaped lever. A spring is provided between the damping film and the bottom of the upper end of the L-shaped lever. The bottom of the damping film is in close contact with the top of the damping wheel.

[0007] Preferably, the water stain removal component includes a horizontal bar, with C-shaped brackets installed at both ends of the horizontal bar. The C-shaped brackets at both ends of the horizontal bar are respectively connected to the front ends of L-shaped plates on both sides, and a squeegee is installed at the bottom of the horizontal bar.

[0008] Preferably, the spray system includes a spray head installed on one side of the bottom of the water tank. A water pipe is installed inside the water tank. One end of the water pipe is connected to the spray head, and the other end extends to the lower part of the inner wall of the water tank. A water pump is installed in the middle section of the water pipe.

[0009] Preferably, a second central control compartment is embedded in the bottom of the water tank, and a second power supply, a second circuit board, and a second relay are installed inside the second central control compartment.

[0010] Preferably, the end of the water tank inserted into the cabin is provided with a water injection valve and a charging connector. The water injection valve is connected to the inner wall of the water tank, and the charging connector is electrically connected to a second power source. The bottom of the inner wall of the cabin is provided with a water supply connector and a power socket. The water supply connector can be inserted into the water injection valve, and the power socket can be connected to the charging connector.

[0011] Preferably, the folding cabin includes a rotating frame, which is installed on the side of the slide away from the first central control cabin. First electric drive arms are installed at both ends of the rotating frame, and second electric drive arms are rotatably installed on both sides of the cabin. The second electric drive arms are rotatably connected to the first electric drive arms.

[0012] Preferably, a gear is rotatably installed inside the slide, and a toothed groove is provided at the bottom of the crossbeam. The gear meshes with the toothed groove at the bottom of the crossbeam. A gear motor is installed inside the first central control compartment, and the output end of the gear motor passes through the slide and is fixedly connected to the gear.

[0013] The cleaning method of the above-mentioned self-cleaning device for solar photovoltaic modules includes S1-S4, characterized in that: S1. The first circuit board controls the gear motor to drive the gear to rotate. The gear meshes with the tooth groove at the bottom of the crossbeam and drives the slide block to slide along the crossbeam, moving the cabin to one side of the photovoltaic panel surface. Then, the first electric drive arm and the second electric drive arm are activated. The first electric drive arm and the second electric drive arm drive the cabin to the lowest point of the photovoltaic panel surface. S2. Once the cabin has moved to the designated position on the photovoltaic panel surface, the water pump is first started via the second circuit board to send water from the water tank into the spray head through the water pipe and spray it evenly onto the surface of the rolling towel. Then, the drive motor is started to drive the drive roller to rotate. The drive roller drives the waterproof rubber and the rolling towel on its surface to rotate continuously. While the rolling towel rotates, it continuously wipes the surface of the photovoltaic panel and climbs upward along the surface of the photovoltaic panel. After wiping, the rolling towel will be dried by the sewage scraper, and the sewage will flow down and drip off the surface of the photovoltaic panel. S3. When the rolling towel reaches the highest point on the photovoltaic panel surface, the hydraulic rod is activated via the second circuit board. The hydraulic rod drives the L-shaped lever and damping wheel to contact the photovoltaic panel surface downwards, pushing the rolling towel away from the photovoltaic panel surface. At the same time, the wiper blade, driven by the C-shaped bracket, moves downwards to adhere to the photovoltaic panel surface. Due to its own gravity, the damping wheel supports the water tank and rolling towel components to move downwards along the photovoltaic panel surface. Simultaneously, the spring pushes the damping film to squeeze the damping wheel, increasing the rolling resistance of the damping wheel and slowing down the descent speed. Furthermore, the wiper blade thoroughly scrapes away the sewage on the photovoltaic panel surface as it descends, until the water tank and rolling towel components fall back into the cabin. After components such as S4, water tank, and rolling towel fall into the cabin, the first circuit board controls the gear motor to drive the gear to rotate. The gear meshes with the tooth groove at the bottom of the crossbeam and drives the slide to slide along the crossbeam, so as to move the cabin to the surface of the uncleaned photovoltaic panel to continue the cleaning work.

[0014] The beneficial effects of this invention are as follows: By wetting the rolling towel with a spray system and then driving the rolling towel to move and climb along the surface of the photovoltaic panel while wiping away stains on the photovoltaic panel surface, this method replaces the traditional water-washing self-cleaning system's method of spraying water over a large area, thereby greatly reducing water demand, saving water resources, and alleviating water supply pressure. When the rolling towel climbs to a high position, the lifting resistance wheel group lifts the rolling towel and lowers the water stain removal component. The machine's own gravity drives it to slowly descend, simultaneously removing water stains from the photovoltaic panel surface, thereby reducing additional energy consumption. The gravity-driven method saves half the power consumption of the machine's stroke, while also removing residual water stains from the photovoltaic panel surface, preventing scale formation, and further improving the photovoltaic panel's power generation efficiency. Attached Figure Description

[0015] Figure 1 This invention provides a usage scenario diagram; Figure 2 This is a schematic diagram of the installation location provided by the present invention; Figure 3 A schematic diagram of the cleaning state provided by the present invention; Figure 4 This is a schematic diagram of gear meshing provided by the present invention; Figure 5 This is a schematic diagram of the slide mounting provided by the present invention; Figure 6 This is a schematic diagram of the overall structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the first central control cabin provided by the present invention; Figure 8 This is a schematic diagram of water tank insertion provided by the present invention; Figure 9 A cockpit sectional view provided for this invention; Figure 10 This is a cross-sectional view of the water tank provided by the present invention; Figure 11 Detailed diagram of the water tank connection provided by this invention; Figure 12 This is a bottom view of the rolling towel provided by the present invention; Figure 13 This is a schematic diagram of the internal structure of the water tank under clean conditions provided by the present invention; Figure 14 Exploded view of the outer side plate provided for this invention; Figure 15 An exploded view of the inner side plate provided for this invention.

[0016] In the diagram: 111 crossbeam, 112 fixing clamp, 113 slide block, 114 gear, 115 gear motor, 121 first central control compartment, 122 first power supply, 123 first circuit board, 124 first relay, 131 rotating frame, 132 first electric drive arm, 133 second electric drive arm, 134 cockpit, 135 water supply connector, 136 power socket, 141 water tank, 142 water intake pipe, 143 water pump, 144 sprinkler head, 144 water injection valve. 145. Charging connector; 146. Sewage scraper; 147. Second central control compartment; 151. Second power supply; 152. Second circuit board; 153. Second relay; 154. Inner side plate; 161. Drive motor; 162. Drive roller; 163. Waterproof rubber; 164. Rolling towel; 165. Outer side plate; 171. Hydraulic rod; 172. L-shaped lever; 173. Damping wheel; 174. Damping sheet; 175. C-shaped bracket; 181. Horizontal bar; 182. Squeegee; 183. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example 1, such as Figure 1 - Figure 10 and Figure 14 As shown, a self-cleaning device and cleaning method for solar photovoltaic modules according to a first aspect embodiment of the present invention includes a mobile cabin and a detachable scrubbing machine. The mobile cockpit includes a crossbeam 111, a fixing clamp 112 is installed on the top of the crossbeam 111, the fixing clamp 112 is fixedly installed on the photovoltaic panel bracket of the solar photovoltaic module, a slide block 113 is slidably installed on the crossbeam 111, a first central control cabin 121 is installed on one side of the slide block 113, a first power supply 122, a first circuit board 123 and a first relay 124 are installed in the first central control cabin 121, and a folding cabin body is installed on the other side of the slide block 113, the folding cabin body includes a cockpit 134; The detachable scrubbing machine includes a water tank 141, which is inserted into the cabin 134. A towel wheel system is provided at the center of the bottom of the water tank 141. The towel wheel system includes two inner side plates 161, and a rolling towel 165 is provided between the two inner side plates 161. A spray system is provided on one side of the bottom of the water tank 141, which is located on the rolling towel 165, and a sewage scraper 147 is installed on the other side. An outer side plate 171 is installed on the outside of the inner side plate 161. A lifting resistance wheel assembly is installed between the outer side plate 171 and the inner side plate 161. The lifting resistance wheel assembly includes an L-shaped lever 173. Several damping wheels 174 are rotatably installed at the lower end of the L-shaped lever 173. A water stain scraping component is installed at the front end of the L-shaped lever 173.

[0019] In the above embodiments, it should be noted that solar photovoltaic modules are usually composed of a bottom photovoltaic panel support and a tilted photovoltaic panel. This invention is only applicable to photovoltaic panels with an angle greater than 30° with the ground. A connecting protrusion is welded to the top of the crossbeam 111 at the position corresponding to the photovoltaic panel support. The fixing clamp 112 is installed on the top connecting protrusion of the crossbeam 111 and both sides of the photovoltaic panel support by bolts, and clamps them to achieve the effect of fixing the crossbeam 111. The first circuit board 123 is equipped with a microcontroller (MCU), a signal transmitting module, and a signal receiving module; the first power supply 122 is a key component that provides stable voltage and current for the mobile cockpit. The first power supply 122 is connected to an external AC power source (such as a solar photovoltaic module) and converts it into DC power or other specific forms of voltage required by the equipment to ensure the normal operation of various devices in the mobile cockpit; the first relay 124 is an electrical control device that controls high-power current with low-power current and is used to control the opening and closing of various motor systems, hydraulic systems, and pump systems. The cabin 134 is moved laterally by the sliding block 113 on the sliding beam 111, and then the telescopic system inside the folding cabin is used to move the cabin 134 to the designated cleaning position on the photovoltaic panel surface. After the cabin 134 moves to the designated cleaning position on the photovoltaic panel surface, the rolling towel 165 is moistened by the spray system, and then the rolling towel 165 is driven to move and climb along the photovoltaic panel surface while wiping the stains on the photovoltaic panel surface. This replaces the traditional water-washing self-cleaning system's method of spraying water over a large area, so as to greatly reduce water demand, save water resources, and alleviate water supply pressure. When the rolling towel rises to a high position, the lifting resistance wheel group lifts the rolling towel 165 and lowers the water stain removal component. The machine uses its own gravity to drive it to descend slowly, while scraping water stains off the surface of the photovoltaic panel. This reduces additional energy consumption. By using gravity to drive the machine, half of the power consumption during its stroke is saved. At the same time, it removes residual water stains from the surface of the photovoltaic panel, preventing the formation of scale and further improving the power generation efficiency of the photovoltaic panel.

[0020] Example 2, as Figure 9 , Figure 10 and Figure 12 - Figure 15As shown, a self-cleaning device and method for solar photovoltaic modules includes Embodiment 1. Furthermore, the towel wheel system includes drive rollers 163, with three sets of drive rollers 163 rotatably mounted between two inner side plates 161. Waterproof rubber 164 is sleeved on the outer wall of the three sets of drive rollers 163, and a rolling towel 165 is adhered to the surface of the waterproof rubber 164. A drive motor 162 is mounted at one end of each drive roller 163. The lifting resistance wheel assembly includes a hydraulic rod 172, which is fixedly mounted on the surface of the inner side plate 161. The lower output end of the pressure rod 172 is fixedly connected to the upper end of the L-shaped lever 173. A damping film 175 is provided at the bottom of the upper end of the L-shaped lever 173. A spring is provided between the damping film 175 and the bottom of the upper end of the L-shaped lever 173. The bottom of the damping film 175 is in close contact with the top of the damping wheel 174. The water stain removal assembly includes a horizontal bar 182. C-shaped brackets 181 are installed at both ends of the horizontal bar 182. The C-shaped brackets 181 at both ends of the horizontal bar 182 are respectively connected to the front ends of the L-shaped levers 173 on both sides. A squeegee strip 183 is installed at the bottom of the horizontal bar 182.

[0021] In the above embodiments, it should be noted that a waterproof seal is applied between the waterproof rubber sheet 164 and the inner side plate 161; the damping sheet 175 and the damping wheel 174 are made of wear-resistant rubber material; and the wiper blade 183 and the wastewater wiper blade 147 are also made of wear-resistant rubber material. After the spray system wets the rolling towel 165, the drive motor 162 is started to drive the drive roller 163 to rotate. The drive roller 163 drives the waterproof rubber 164 and the rolling towel 165 on its surface to rotate continuously, so that the rolling towel 165 can continuously wipe the surface of the photovoltaic panel and climb upward along the surface of the photovoltaic panel while rotating. After wiping, the rolling towel 165 will be dried by the sewage scraper 147, and the sewage will flow down and drip down along the surface of the photovoltaic panel. When the rolling towel 165 climbs to the highest point of the photovoltaic panel surface, the hydraulic rod 172 is activated. The hydraulic rod 172 drives the L-shaped lever 173 and the damping wheel 174 to contact the photovoltaic panel surface downwards, and pushes the rolling towel 165 away from the photovoltaic panel surface. At the same time, the wiper 183, driven by the C-shaped bracket 181, moves downwards to adhere to the photovoltaic panel surface. Under its own gravity, the damping wheel 174 supports the water tank 141 and the rolling towel 165 and other components to move downwards along the photovoltaic panel surface. At the same time, the spring pushes the damping film 175 to squeeze the damping wheel 174, increasing the rolling resistance of the damping wheel 174 and slowing down the descent speed. The wiper 183 thoroughly scrapes away the sewage on the photovoltaic panel surface as it descends, until the water tank 141 and the rolling towel 165 and other components fall back into the cabin 134, so as to achieve the effect of using the machine's own gravity to move and scrape away the residual water stains on the photovoltaic panel surface.

[0022] Example 3, as Figure 8 - Figure 11As shown, a self-cleaning device and method for solar photovoltaic modules, including Embodiment 2, further includes a spray system comprising a spray head 144 installed on one side of the bottom of a water tank 141. A water intake pipe 142 is installed inside the water tank 141, with one end connected to the spray head 144 and the other end extending to the lower part of the inner wall of the water tank 141. A water pump 143 is installed in the middle section of the water intake pipe 142. A second central control compartment 151 is embedded in the bottom of the water tank 141, and a water pump 143 is installed inside the second central control compartment 151. The device includes a second power supply 152, a second circuit board 153, and a second relay 154. The end of the water tank 141 inserted into the cockpit 134 is equipped with a water injection valve 145 and a charging connector 146. The water injection valve 145 is connected to the inner wall of the water tank 141, and the charging connector 146 is electrically connected to the second power supply 152. The bottom of the inner wall of the cockpit 134 is equipped with a water supply connector 135 and a power socket 136. The water supply connector 135 can be inserted into the water injection valve 145, and the power socket 136 can be connected to the charging connector 146.

[0023] In the above embodiments, it should be noted that the second circuit board 153 is equipped with a microcontroller (MCU), a signal transmitting module, and a signal receiving module. The second circuit board 153 remotely interacts with the first circuit board 123 through the signal transmitting module and the signal receiving module. The second power supply 152 is a key component that provides stable voltage and current for the detachable scrubbing machine. The second power supply 152 is connected to the charging connector 146 and the battery to ensure the normal operation of each device in the detachable scrubbing machine. The second relay 154 is an electrical control device that controls high-power current with low-power current, and is used to control the opening and closing of various motor systems, hydraulic systems, and pump systems. The second circuit board 153 controls the second relay 154 to start the water pump 143 so as to transport the water in the water tank 141 through the water pipe 142 to the spray head 144 and spray it out. The water inlet valve 145 is a self-closing valve. When the water supply connector 135 is inserted into the water inlet valve 145, the water inlet valve 145 opens automatically. When the water supply connector 135 is removed from the water inlet valve 145, the water valve 145 closes automatically. The power supply socket 136 is connected to the first power supply 122. When the power supply socket 136 is connected to the charging connector 146, the power supply socket 136 charges the charging connector 146.

[0024] Example 4, as Figure 3 - Figure 8As shown, a self-cleaning device and cleaning method for solar photovoltaic modules, including Embodiment 3, further includes a folding cabin including a rotating frame 131, which is installed on the side of the slide 113 away from the first central control cabin 121. The rotating frame 131 is equipped with first electric drive arms 132 at both ends. The cabin 134 is rotatably equipped with second electric drive arms 133 on both sides. The second electric drive arms 133 are rotatably connected to the first electric drive arms 132. A gear 114 is rotatably installed in the slide 113. A toothed groove is provided at the bottom of the crossbeam 111. The gear 114 is meshed with the toothed groove at the bottom of the crossbeam 111. A gear motor 115 is installed in the first central control cabin 121. The output end of the gear motor 115 passes through the slide 113 and is fixedly connected to the gear 114.

[0025] In the above embodiment, it should be noted that the first circuit board 123 controls the first relay 124 to start the gear motor 115 to drive the gear 114 to rotate. The gear 114 meshes with the bottom tooth groove of the crossbeam 111 and drives the slide block 113 to slide along the crossbeam 111, so as to achieve the effect of driving the cabin 134 to move laterally. Electric motors are installed at the rotating joints of the first electric drive arm 132 and the second electric drive arm 133. The first circuit board 123 controls the first relay 124 to start the electric motors at the joints of the first electric drive arm 132 and the second electric drive arm 133, so as to control the first electric drive arm 132 and the second electric drive arm 133 to drive the cabin 134 to fold to the back of the photovoltaic panel or move to the surface of the photovoltaic panel.

[0026] The cleaning method of the present invention is as follows: Those skilled in the art control the gear motor 115 via the first circuit board 123 to drive the gear 114 to rotate. The gear 114 meshes with the bottom tooth groove of the crossbeam 111, causing the slide block 113 to slide along the crossbeam 111, moving the cabin 134 to one side of the photovoltaic panel surface. Then, the first electric drive arm 132 and the second electric drive arm 133 are activated, moving the cabin 134 to the lowest point of the photovoltaic panel surface. Once the cabin 134 has moved to the designated position on the photovoltaic panel surface, the second circuit... The water pump 143 starts, sending water from the water tank 141 through the water pipe 142 into the spray head 144 and spraying it evenly onto the surface of the rolling towel 165. Then, the drive motor 162 starts, driving the drive roller 163 to rotate. The drive roller 163 drives the waterproof rubber sheet 164 and the rolling towel 165 on its surface to rotate continuously. As the rolling towel 165 rotates, it continuously wipes the surface of the photovoltaic panel and climbs upwards along the panel surface. After wiping, the rolling towel 165 is dried by the wastewater scraper 147, and the wastewater flows downwards and drips off the photovoltaic panel surface. Once the rolling towel 165 has climbed... When the photovoltaic panel reaches its highest point, the hydraulic rod 172 is activated via the second circuit board 153. The hydraulic rod 172 drives the L-shaped lever 173 and the damping wheel 174 downwards to contact the photovoltaic panel surface, and in turn, pushes the rolling towel 165 away from the photovoltaic panel surface. Simultaneously, the squeegee 183, driven by the C-shaped bracket 181, moves downwards to adhere to the photovoltaic panel surface. Due to its own gravity, the damping wheel 174 supports the water tank 141 and the rolling towel 165, among other components, to move downwards along the photovoltaic panel surface. At the same time, a spring pushes the damping film 175 to compress the damping wheel 174, increasing its pressure. The rolling resistance of 4 slows down the descent speed, and the squeegee 183 thoroughly removes the sewage from the surface of the photovoltaic panel while descending, until components such as the water tank 141 and the rolling towel 165 fall back into the cabin 134. After the components such as the water tank 141 and the rolling towel 165 fall into the cabin 134, the gear motor 115 is controlled again by the first circuit board 123 to drive the gear 114 to rotate. The gear 114 meshes with the bottom tooth groove of the crossbeam 111 and drives the slide 113 to slide along the crossbeam 111, so as to move the cabin 134 to the uncleaned photovoltaic panel surface to continue the cleaning work.

[0027] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A self-cleaning device for solar photovoltaic modules, comprising a mobile cabin and a detachable scrubbing machine, characterized in that: The mobile cockpit includes a crossbeam (111), a fixing clamp (112) is installed on the top of the crossbeam (111), the fixing clamp (112) is fixedly installed on the photovoltaic panel bracket of the solar photovoltaic module, a slide seat (113) is slidably installed on the crossbeam (111), a first central control cabin (121) is installed on one side of the slide seat (113), a first power supply (122), a first circuit board (123) and a first relay (124) are installed in the first central control cabin (121), and a folding cabin body is installed on the other side of the slide seat (113), the folding cabin body includes a cockpit (134). The separate scrubbing machine includes a water tank (141), which is inserted into the cabin (134). A towel wheel system is provided at the center of the bottom of the water tank (141). The towel wheel system includes two inner side plates (161). A rolling towel (165) is provided between the two inner side plates (161). A spray system is provided on one side of the rolling towel (165) at the bottom of the water tank (141), and a sewage scraper (147) is installed on the other side. An outer side plate (171) is installed on the outside of the inner side plate (161). A lifting resistance wheel assembly is installed between the outer side plate (171) and the inner side plate (161). The lifting resistance wheel assembly includes an L-shaped lever (173). Several damping wheels (174) are rotatably installed at the lower end of the L-shaped lever (173). A water stain scraping component is installed at the front end of the L-shaped lever (173).

2. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The towel wheel system includes a drive roller (163), three sets of drive rollers (163) are rotatably mounted between two inner side plates (161), and waterproof rubber (164) is sleeved on the outer wall of the three sets of drive rollers (163). The rolling towel (165) is bonded to the surface of the waterproof rubber (164), and a drive motor (162) is mounted on one end of the drive roller (163).

3. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The lifting resistance wheel assembly includes a hydraulic rod (172), which is fixedly installed on the surface of the inner side plate (161). The lower output end of the hydraulic rod (172) is fixedly connected to the upper end of the L-shaped lever (173). A damping film (175) is provided at the bottom of the upper end of the L-shaped lever (173). A spring is provided between the damping film (175) and the bottom of the upper end of the L-shaped lever (173). The bottom of the damping film (175) is in close contact with the top of the damping wheel (174).

4. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The water stain removal assembly includes a horizontal bar (182), with C-shaped brackets (181) installed at both ends of the horizontal bar (182). The C-shaped brackets (181) at both ends of the horizontal bar (182) are respectively connected to the front ends of L-shaped plates (173) on both sides. A squeegee strip (183) is installed at the bottom of the horizontal bar (182).

5. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The spray system includes a spray head (144) installed on one side of the bottom of a water tank (141). A water pipe (142) is installed inside the water tank (141). One end of the water pipe (142) is connected to the spray head (144), and the other end extends to the lower part of the inner wall of the water tank (141). A water pump (143) is installed in the middle section of the water pipe (142).

6. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The bottom of the water tank (141) is embedded with a second central control compartment (151), which contains a second power supply (152), a second circuit board (153), and a second relay (154).

7. A self-cleaning device for solar photovoltaic modules according to claim 6, characterized in that: The water tank (141) is inserted into the cockpit (134) and is provided with a water injection valve (145) and a charging connector (146). The water injection valve (145) is connected to the inner wall of the water tank (141), and the charging connector (146) is electrically connected to the second power source (152). The bottom of the inner wall of the cockpit (134) is provided with a water supply connector (135) and a power socket (136). The water supply connector (135) can be inserted into the water injection valve (145), and the power socket (136) can be connected to the charging connector (146).

8. The self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: The folding cabin includes a rotating frame (131), which is installed on the side of the slide (113) away from the first central control cabin (121). The rotating frame (131) is equipped with first electric drive arms (132) at both ends. The cabin (134) is rotatably equipped with second electric drive arms (133) on both sides. The second electric drive arms (133) are rotatably connected to the first electric drive arms (132).

9. A self-cleaning device for solar photovoltaic modules according to claim 1, characterized in that: A gear (114) is rotatably installed inside the slide (113). A toothed groove is provided at the bottom of the crossbeam (111). The gear (114) meshes with the toothed groove at the bottom of the crossbeam (111). A gear motor (115) is installed inside the first central control compartment (121). The output end of the gear motor (115) passes through the slide (113) and is fixedly connected to the gear (114).

10. A cleaning method using the self-cleaning device for solar photovoltaic modules according to claims 1-9, comprising S1-S4, characterized in that: S1. The first circuit board (123) controls the gear motor (115) to drive the gear (114) to rotate. The gear (114) meshes with the bottom tooth groove of the crossbeam (111) and drives the slide (113) to slide along the crossbeam (111), driving the cabin (134) to move to one side of the photovoltaic panel surface. Then, the first electric drive arm (132) and the second electric drive arm (133) are started. The first electric drive arm (132) and the second electric drive arm (133) drive the cabin (134) to move to the lowest point of the photovoltaic panel surface. S2. Once the cabin (134) moves to the designated position on the photovoltaic panel surface, the water pump (143) is started through the second circuit board (153) to send the water in the water tank (141) into the spray head (144) through the water pipe (142) and spray it evenly onto the surface of the rolling towel (165). Then, the drive motor (162) is started to drive the drive roller (163) to rotate. The drive roller (163) drives the waterproof rubber (164) and the rolling towel (165) on its surface to rotate continuously. While the rolling towel (165) rotates, it continuously wipes the surface of the photovoltaic panel and climbs upward along the surface of the photovoltaic panel. The wiped rolling towel (165) will be dried by the sewage scraper (147), and the sewage will flow down and drip along the surface of the photovoltaic panel. S3. When the rolling towel (165) climbs to the highest point of the photovoltaic panel surface, the hydraulic rod (172) is activated through the second circuit board (153). The hydraulic rod (172) drives the L-shaped lever (173) and the damping wheel (174) to contact the photovoltaic panel surface downwards, and pushes the rolling towel (165) away from the photovoltaic panel surface. At the same time, the squeegee (183) is driven by the C-shaped bracket (181) to adhere to the photovoltaic panel surface downwards. Affected by its own gravity, the damping wheel (174) supports the water tank (141) and the rolling towel (165) and other components to move downwards along the photovoltaic panel surface. At the same time, the spring pushes the damping film (175) to squeeze the damping wheel (174), increasing the rolling resistance of the damping wheel (174) and slowing down the descent speed. The squeegee (183) thoroughly scrapes away the sewage on the photovoltaic panel surface while descending, until the water tank (141) and the rolling towel (165) and other components fall back into the cabin (134). After components such as S4, water tank (141) and rolling towel (165) fall into the cabin (134), the gear motor (115) is controlled again by the first circuit board (123) to drive the gear (114) to rotate. The gear (114) meshes with the bottom tooth groove of the crossbeam (111) and drives the slide (113) to slide along the crossbeam (111) to move the cabin (134) to the surface of the uncleaned photovoltaic panel to continue cleaning.

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