Wind and sand environment photovoltaic panel cleaning device and method for cleaning photovoltaic panel through wind and sand environment photovoltaic panel cleaning device
The cleaning device uses wind-guided path planning and dual wind systems to efficiently remove dirt and dust from solar panels with minimal water, addressing inefficiencies and damage in sandy environments.
Patent Information
- Application Number
- CN202510555560.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-07-15
AI Technical Summary
In windy and sandy environments, dust and stubborn dirt are prone to accumulate on the surface of the photovoltaic panels. The existing cleaning equipment has poor cleaning effect, large water consumption and causes damage to the photovoltaic panels.
The walking mechanism is used to drive the blowing mechanism and the humidification and cleaning mechanism, combined with the induction module to detect the wind direction, remove floating dust through a special wind field, and use humidification roller brush and fixed-point soaking and rinsing technology to remove stubborn dirt to avoid secondary pollution.
It has achieved efficient removal of stubborn dirt on the surface of photovoltaic panels in wind and sand environments, reduced water consumption, avoided damage to photovoltaic panels, and improved cleaning efficiency and quality.
Smart Images
Figure CN120320698A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of photovoltaic panel cleaning equipment. Background Art
[0002] Photovoltaic panels are usually deployed outdoors in open spaces. Atmospheric dust and foreign object occlusion are important factors affecting the power generation efficiency of photovoltaic panels, and the dirt on photovoltaic panels seriously affects the power generation quality. Especially in a sandy environment, due to strong winds and little precipitation, dust is likely to accumulate on the surface of photovoltaic panels and is easily mixed with fallen bird droppings to form stubborn dirt. Therefore, photovoltaic panels need to be cleaned regularly to ensure their power generation efficiency. However, common cleaning equipment has problems such as poor cleaning effect, large water consumption, and great damage to photovoltaic panels. Summary of the Invention
[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides a photovoltaic panel cleaning device in a sandy environment and a method for cleaning photovoltaic panels, which can use less water to remove stubborn dirt on the surface of photovoltaic panels and will not cause damage to photovoltaic panels.
[0004] Technical Solution: To achieve the above object, the photovoltaic panel cleaning device in a sandy environment and the method for cleaning photovoltaic panels of the present invention include a traveling mechanism, which can drive a sweeping and blowing mechanism and a humidifying and cleaning mechanism to walk on the surface of a photovoltaic panel array along a planned trajectory, and complete the cleaning operations of multiple cleaning blocks in the transverse direction in the downwind direction in sequence, and complete the cleaning operation of a single cleaning block in the longitudinal direction in the way of first walking downwind and then walking in the reverse direction; and further include an induction module for detecting the environmental wind direction for the traveling mechanism to generate the planned trajectory.
[0005] The humidifying and cleaning mechanism includes a roller brush module, which can humidify and brush the area swept by the sweeping and blowing mechanism; and also includes a separable flushing module, which can perform fixed-point flushing on the adhesives remaining after the roller brush module brushes multiple times; and when separated, it can form a sealed chamber for fixed-point soaking on the surface of the photovoltaic panel.
[0006] Further, the sweeping and blowing mechanism includes a dust sweeping brush head, which can sweep the floating dust in the advancing direction of the traveling mechanism. Blowing structures are arranged on both sides of the dust sweeping brush head, which can blow the swept floating dust out from one side of the sweeping and blowing mechanism, and this blowing side is the side away from the cleaned area, and the blowing direction of the floating dust is the downwind direction of the environmental wind.
[0007] Further, the blowing structure relatively close to the cleaned area can generate a strong wind field in the transverse direction, and the strong wind field blows through the dust sweeping brush head and the dust-raising area in front of it; the blowing structure relatively far from the cleaned area can generate a weak wind field at an angle with the strong wind field, the wind direction of the weak wind field is biased towards the sweeping direction of the dust sweeping brush head, and the strong wind field and the weak wind field meet on the side of the dust sweeping brush head away from the cleaned area.
[0008] Further, the humidifying and cleaning mechanism further includes a vision module, which can identify large-sized adherents and can be used to drive any one of the roller brush module and the plurality of flushing modules to correspond to the residual adherents.
[0009] Further, the roller brush module includes a wet brush head. When the wet brush head is attached to the surface of the photovoltaic panel, it can rotate relative to the pressure frame under the action of the walking mechanism, so as to roll relative to the surface of the photovoltaic panel; the pressure frame can lift and lower the wet brush head relative to the surface of the photovoltaic panel array to change the pressure applied by the wet brush head to the photovoltaic panel; the wet brush head can also rotate actively relative to the pressure frame.
[0010] Further, the flushing module includes a main body member, the end of which can be close to or far from the surface of the photovoltaic panel array. A separating member is provided at the end of the main body member. There is a chamber inside the separating member, and an opening is provided at the end face close to the photovoltaic panel. A sealing ring is provided at the opening, and the sealing ring has an adsorption function. When the sealing ring is adsorbed and attached to the surface of the photovoltaic panel, the chamber inside the separating member forms an immersion chamber; the immersion chamber is connected to the water tank through a water inlet channel and a water pump. The water inlet channel includes two channel parts respectively buried in the main body member and the separating member, and sealing valves are provided at the ports of the two parts of the channel at the connection.
[0011] Further, the immersion chamber is further connected with a return channel, and the return channel passes through a filtering device and is connected to the water tank to form a circulation loop; the water inlet channel is connected with an extended spray head at the port of the immersion chamber. The extended spray head is located in the middle of the immersion chamber, and its spraying end is arranged close to the surface of the photovoltaic panel.
[0012] Further, the walking mechanism includes a longitudinal displacement module, which can drive the sweeping and blowing mechanism and the humidifying and cleaning mechanism to move longitudinally back and forth; it further includes a transverse displacement module, which can drive the longitudinal displacement module to move unidirectionally multiple times along the downwind direction on the surface of the photovoltaic panel array, and the transverse displacement module can lift the longitudinal displacement module relative to the surface of the photovoltaic panel array; the sweeping and blowing mechanism and the humidifying and cleaning mechanism are connected to the longitudinal displacement module through a rotating member, and the rotating member can rotate by degrees to adjust the up-and-down relative position relationship between the sweeping and blowing mechanism and the humidifying and cleaning mechanism.
[0013] Further, it includes the following steps:
[0014] S1. According to the measured wind direction and wind force, analyze and obtain the crosswind and longitudinal downwind directions of the environmental wind in the plane of the photovoltaic panel array. Determine the starting movement direction of the longitudinal displacement module in a single cleaning block according to the longitudinal downwind direction, and determine the starting cleaning block according to the crosswind direction, so as to generate a planned trajectory;
[0015] S2. Adjust the vertical relative position relationship between the sweeping and blowing mechanism and the humidifying and cleaning mechanism according to the planned trajectory and the actual situation of the environmental wind;
[0016] S3. With the sweeping and blowing mechanism in the front and the humidifying and cleaning mechanism in the rear, unidirectionally traverse a single cleaning block driven by the traveling mechanism. During the process, the sweeping and blowing mechanism and the roller brush module perform cleaning operations synchronously; when the vision module identifies large-sized adhesions, increase the pressure applied by the wet brush head when passing through the adhesion;
[0017] S4. Keep the positions of the sweeping and blowing mechanism and the humidifying and cleaning mechanism unchanged, and traverse the cleaning block in the reverse direction. During the process, the roller brush module performs cleaning operations, and the sweeping and blowing mechanism performs drying operations; when the vision module identifies large-sized adhesions, use the wet brush head to apply fixed-point increased pressure on the adhesion; when residual adhesions can still be identified after the fixed-point increased pressure on the adhesion, first use the flushing module to perform fixed-point flushing on the residual adhesion in the connected state, then separate the separating part and leave it on the surface of the photovoltaic panel for fixed-point soaking, and the rest continue to complete the reverse traversal process to complete the reciprocating cleaning action of a single cleaning block;
[0018] S5. Replace to the adjacent cleaning block through the lateral displacement module;
[0019] S6. After completing the cleaning actions of multiple cleaning blocks, recover the separating parts that have reached the soaking duration, and perform fixed-point flushing and fixed-point increased pressure on the roller brush again;
[0020] Complete the cleaning operations within the interval composed of multiple consecutive cleaning blocks according to steps S1 - S6, repeat S1 - S6 to continue performing the cleaning operations in the adjacent interval until the cleaning operations on the entire surface of the photovoltaic panel array are completed.
[0021] Advantageous effects: The photovoltaic panel cleaning device in the sandy and windy environment and its method for cleaning photovoltaic panels of the present invention sweep away most of the easily removable floating dust and sand through the sweeping form of a special wind field. On this basis, through humidifying roller brushes and fixed-point soaking and flushing, targeted removal of micro adhesions and stubborn dirt is carried out respectively. Moreover, compared with spray flushing, the water consumption is extremely small, and it will not cause damage to the surface of the photovoltaic panel. Freely plan the cleaning travel trajectory according to the actual wind direction to avoid immediate secondary pollution caused by the influence of the environmental wind direction, so as to improve the cleaning efficiency and cleaning quality in the sandy and windy environment. Description of the Drawings
[0022] Figure 1 It is a schematic structural position diagram of the photovoltaic panel cleaning device of the present invention relative to the photovoltaic panel;
[0023] Figure 2 It is a schematic structural diagram of the sweeping and blowing mechanism according to an embodiment of the present invention;
[0024] Figure 3This is a schematic structural diagram of a humidifying and cleaning mechanism according to an embodiment of the present invention. Detailed implementation manners
[0025] The present invention will be further described in detail below with reference to the accompanying drawings.
[0026] As shown in the attached Figures 1-3 The sandstorm environment photovoltaic panel cleaning device and its method for cleaning photovoltaic panels include a traveling mechanism, which can drive the sweeping and blowing mechanism 1 and the humidifying and cleaning mechanism 2 to travel on the surface of the photovoltaic panel array 3 according to a planned trajectory, and complete the cleaning operations of multiple cleaning blocks in the lateral direction in the downwind direction in sequence, and complete the cleaning operation of a single cleaning block in the longitudinal direction in the way of first traveling downwind and then in the reverse direction; each cleaning block is a longitudinal strip-shaped block with the cleaning range of the cleaning device as the width, and multiple cleaning blocks are cleaned in sequence in the downwind direction, which can greatly reduce the degree of secondary pollution caused by subsequent cleaning to the cleaned area. Especially avoid the re-adsorption of the dust generated by sweeping and blowing on the surface of the photovoltaic panel when it is not dry. Downwind cleaning can utilize the action of a part of the environmental wind to quickly blow the floating dust swept up away from the surface of the photovoltaic panel, thereby optimizing the cleaning effect.
[0027] It further includes an induction module for detecting the environmental wind direction for the traveling mechanism to generate the planned trajectory; the induction module uses an existing wind direction sensor, which is integrated on the top of the traveling mechanism. Through induction, when the environmental wind direction changes, after completing the cleaning operation of a cleaning block, the cleaning trajectory is re-planned to avoid immediate secondary pollution to the greatest extent, and thus the best cleaning effect can be obtained.
[0028] Among them, the traveling mechanism can directly select a crawler chassis, which has good climbing and obstacle-crossing capabilities, and through the combined action of scanning the edges of the photovoltaic panels, detecting with sensors and the navigation system, it is driven to run along the planned trajectory.
[0029] Preferably, the traveling mechanism includes a longitudinal displacement module 6, which can drive the sweeping and blowing mechanism 1 and the humidifying and cleaning mechanism 2 to move longitudinally back and forth; specifically, it consists of a frame part carrying the sweeping and blowing mechanism 1 and the humidifying and cleaning mechanism 2, and two crawler wheels that can travel longitudinally, and has significant obstacle-crossing capabilities when crossing the protrusions or gaps between adjacent photovoltaic panels.
[0030] It also includes a transverse displacement module 7, which can drive the longitudinal displacement module 6 to move horizontally multiple times along the downwind direction on the surface of the photovoltaic panel array 3, and the transverse displacement module 7 can lift the longitudinal displacement module 6 relative to the surface of the photovoltaic panel array 3; the transverse displacement module 7 can be composed of a guide rail that slides along the transverse arrangement direction of the photovoltaic panel, and a connecting seat slides longitudinally on the guide rail. The longitudinal displacement module 6 can be lifted and set on the connecting seat, so that in the longitudinal driving cleaning process, the guide rail plays a longitudinal guiding role to avoid deviation from the planned cleaning trajectory. The corresponding cleaning block can be replaced by the transverse movement of the guide rail. During the transverse movement, the crawler vehicle can be partially lifted off the surface of the photovoltaic panel to avoid scratches, and it is easier to cross the transverse protrusions and gaps of the photovoltaic panel array. And through the coordinated action of the displacement modules in the transverse and longitudinal directions, the entire cleaning device can be quickly positioned and moved from point to point in the form of easy coordinates on the surface of the photovoltaic panel, and in the subsequent targeted soaking and cleaning, the soaking point left on the surface of the photovoltaic panel can be quickly found. To improve the overall cleaning efficiency.
[0031] The sweeping and blowing mechanism 1 and the humidifying and cleaning mechanism 2 are connected to the longitudinal displacement module 6 via a rotating member, and the rotating member can rotate 180 degrees to adjust the vertical relative position relationship between the sweeping and blowing mechanism 1 and the humidifying and cleaning mechanism 2. The adjustment is specifically made according to the longitudinal tailwind condition.
[0032] The sweeping and blowing mechanism 1 includes a dust sweeping brush head 11, which can sweep the floating dust in the forward direction of the walking mechanism. A roller brush structure with hard bristles can be used. Blowing structures are arranged on both sides of the dust sweeping brush head 11, which can blow the swept floating dust out from one side of the sweeping and blowing mechanism 1, and the blowing side is the side away from the cleaned area, and the blowing direction of the floating dust is in the direction of the wind with the ambient wind. Since the ambient wind is unstable, in order to avoid the direct interference of the ambient wind on the swept dust, a wind field relatively isolated from the ambient wind is formed between the blowing structures on both sides, which can effectively prevent the swept dust from floating around and falling in the cleaned area under the action of the ambient wind. The relatively regular internal wind field allows the dust to be ejected from a position away from the cleaned area and continue to be ejected in the direction away from the cleaned area, and after ejection, it is kept in the state of wind with the ambient wind as much as possible, which helps to quickly move away from the dust and improve the sweeping and blowing efficiency and quality.
[0033] Among them, the blowing structure on the side relatively close to the cleaned area can generate a horizontal strong wind field, and the strong wind field blows through the dust brush head 11 and the dust area in front of it; the blowing structure on the side relatively far away from the cleaned area can generate a weak wind field that forms an angle with the strong wind field, and the wind direction of the weak wind field is biased toward the sweeping direction of the dust brush head 11, and the strong wind field and the weak wind field intersect on the side of the dust brush head 11 away from the cleaned area.
[0034] Both the strong wind field and the weak wind field are uniform and unidirectional wind fields. The strong wind field can blow the raised dust and the dust on the surface of the dust sweeping brush head away from the cleaned area. Due to the stubborn large-sized adhered substances on the surface of the photovoltaic panel, a certain bulge is formed on the surface of the photovoltaic panel, and this bulge may not be directly removed by the dust sweeping brush head 11. Then, when the dust sweeping brush head 11 sweeps across, there is a sweeping blind area on the side of the bulge facing away from the sweeping direction. Through the lateral strong wind field, the floating dust in this blind area can be blown to the side, which is convenient for the cleaning of the dust sweeping brush head 11 and also avoids increasing the cleaning difficulty of the rear humidifying cleaning mechanism 2, ensuring that the humidifying cleaning mechanism 2 can achieve a good cleaning effect with less water consumption.
[0035] When the dust is blown and approaches the weak wind field, affected by the weak wind field, it can be further dispersed into smaller particles, and then it is easier to be blown farther after being blown out. And due to the superposition of the strong wind field and the weak wind field, the wind force when the dust is blown out is greater, and the wind direction also changes from a simple lateral direction to a direction biased towards the forward direction. Therefore, the final blowing direction of the dust can also be adjusted by changing the wind direction of the weak wind field, so as to achieve the effect that the blowing direction is as consistent with the environmental wind direction as possible.
[0036] Preferably, the blowing structure includes a baffle 12 and a plurality of air outlets arranged on the side of the baffle close to the dust sweeping brush head 11; among them, the plurality of air outlets are evenly distributed inside the baffle, so that the generated wind field is uniform. The baffle has the functions of blocking dust and shielding environmental wind.
[0037] During the sweeping and blowing process, both of the baffles 12 are perpendicular to the surface of the photovoltaic panel, and one end of each baffle 12 close to the traveling mechanism is hinged to the bracket of the dust sweeping brush head 11, so that the baffle 12 can swing outwards from a state parallel to the traveling direction to a state perpendicular to the traveling direction, and can be stably maintained at any angular state between the two boundary states. That is, the two side baffles remain parallel before the traveling direction is determined.
[0038] When the longitudinal displacement module 6 moves along the downwind direction, the sweeping and blowing mechanism 1 performs the sweeping and blowing operation. The baffle 12 on the side close to the cleaned area maintains its original state and blows out strong wind to form a strong wind field, which can block the diffusion of dust to the cleaned area and accelerate the blowing away. And the other baffle 12 swings outwards to be parallel to the actual environmental wind direction and blows out weak wind to form a weak wind field. The inclined baffle plays a role in backflow, guiding the sand-containing diversion to blow out along the extension direction of the baffle.
[0039] By providing an openable and closable ventilation opening on the baffle and opening the ventilation opening on the windward side of the sweeping and blowing mechanism 1, environmental wind can be superimposed on the strong wind field and pass through the dust sweeping brush head 11 to obtain a stronger sweeping and blowing effect. The ventilation opening is equipped with a sand filtering net, which can isolate the sand and dust in the environmental wind and only allow the wind to pass through to enhance the effect of the wind field.
[0040] Since the wind field range of the blowing structures on both sides is ahead of the dust sweeping brush head 11, during sweeping and blowing, the wind field acts on the surface of the photovoltaic panel first. Through the pre-side blowing of the strong wind field, a large amount of floating dust will be laterally shifted to accumulate on the side. The floating dust with low adhesion that can be easily blown away. When these floating dust are blown away, the dust sweeping brush head 11 can directly act on the dust with a certain adhesion when it sweeps through, obtaining a stronger cleaning effect and at the same time reducing the resistance of the accumulated floating dust to the cleaning of the dust sweeping brush head 11.
[0041] In addition, when there is a particularly large accumulation of sand and dust on the surface of the photovoltaic panel, micro-dune structures may be formed on the panel surface by strong wind blowing. If only the strong wind field on one side acts, it may only cause wind erosion on the windward side of the micro-dune and cause the sand and dust on the windward side to cross over the top of the dune and accumulate on the leeward side. When the cleaning direction is from bottom to top, these accumulated micro-dunes may slide down along the slope of the photovoltaic panel and then pollute the previously cleaned area below. Then, the weak wind field on the other side can play a significant improvement role. First, the weak wind field can form an air floating layer on the surface of its corresponding baffle. When using this baffle as a reverse flow plate, the sand and dust blown by the strong wind field will not directly act on the baffle surface, thus not generating greater resistance and not causing erosion and wear on the baffle surface. Then, when the strong wind converges the floating dust into micro-dunes and pushes them close to the weak wind field, the weak wind field will simultaneously blow the leeward side of the micro-dune relative to the strong wind, thereby avoiding the accumulation on the leeward side. And the superposition of the two wind fields increases the flow velocity in the superposition wind direction, forming a small-scale negative pressure, which causes the sand and dust on the surface of the micro-dune to be carried away by the wind. Moreover, the closer to the dust sweeping brush head 11 and the closer the air outlet of the weak wind field is to the air outlet of the strong wind field, the more obvious the wind field superposition effect is. The formed micro-dune structure not only gradually decreases in volume but also gradually moves inward to the sweeping range of the dust sweeping brush head 11. The smaller dunes are easier to be swept up by the brush head and blown out in the form of dust. Therefore, when there is a large accumulation of sand and dust, it will not cause excessive resistance to the dust sweeping brush head 11, and there will be no obvious phenomenon of dune accumulation and sliding. Especially during the sweeping process from bottom to top, the direction of the weak wind field is biased upward, which can also prevent the piled-up floating dust from sliding down along the slope of the photovoltaic panel, making the swept floating dust or sand and dust all blown away from the panel surface in a directional form to obtain a better sweeping and blowing effect.
[0042] The humidifying and cleaning mechanism 2 includes a rolling brush module 4, which can perform humidifying rolling on the area swept and blown by the sweeping and blowing mechanism 1. After sweeping and blowing cleaning, the residual obstructions on the surface of the photovoltaic panel are mostly stubborn large dirt, or tiny floating dust adsorbed on the surface of the photovoltaic panel because of its extremely small size and light weight. Among them, the large dirt is scattered, which may be formed by the combination and consolidation of bird droppings and sand and dust, and has strong adhesiveness, making it difficult to thoroughly clean by blowing or brushing. The tiny floating dust is relatively widely and evenly distributed, and it may be generated by the sand and dust carried in the environment falling back onto the surface of the photovoltaic panel again. Through the humidifying rolling brush, the tiny floating dust can be adhered and taken away, and at the same time, it can soften or dissolve the large dirt to a certain extent. For particularly stubborn dirt, by increasing the pressure on the rolling brush, the possibility of cleaning can be improved. The degree of pressure applied is controlled to avoid damaging the photovoltaic panel.
[0043] The rolling brush module 4 includes a wet brush head 41 with a flexible water-absorbing layer, and a water replenishing nozzle 42 is correspondingly arranged on its upper side. Using flexible water-absorbing materials such as flexible bristles or wear-resistant sponges can reduce the damage to the photovoltaic panel when applying pressure to the rolling brush. When the wet brush head 41 is attached to the surface of the photovoltaic panel, it can rotate relative to the pressure applying frame 43 under the action of the walking of the walking mechanism, so as to roll relative to the surface of the photovoltaic panel. The pressure applying frame 43 can lift and lower the wet brush head 41 relative to the surface of the photovoltaic panel array 3 to change the pressure applied by the wet brush head 41 on the photovoltaic panel. The rotating shaft of the wet brush head 41 is connected to the output shaft of the rotary drive motor, so that the wet brush head 41 can actively rotate relative to the pressure applying frame 43. Furthermore, for generally stubborn dirt, pressure can be increased during the process of moving and rolling, while for particularly stubborn dirt, it is necessary to stop and perform fixed-point active rolling. In this way, the rolling time is longer, and during the process, the dirt can be softened to a certain extent by squeezing out the water to assist in cleaning. In this way, for dirt with lower cleaning difficulty, it is only necessary to move and sweep across to effectively improve the cleaning efficiency.
[0044] It also includes a separable flushing module 5, which can perform fixed-point flushing on the adhesives remaining after the rolling brush module 4 has rolled multiple times; and when separated, it can form a closed chamber for fixed-point soaking on the surface of the photovoltaic panel.
[0045] The flushing module 5 includes a main body 51 whose end can approach or move away from the surface of the photovoltaic panel array 3. A separating member 52 is provided at the end of the main body 51. There is a chamber inside the separating member 52, and an opening is provided at the end face close to the photovoltaic panel. A sealing ring is provided at the opening. The sealing ring has an adsorption function. When the sealing ring is adsorbed and attached to the surface of the photovoltaic panel, the chamber inside the separating member 52 forms an immersion chamber 53; the immersion chamber 53 is connected to the water tank through a water inlet channel 54 and a water pump. The water inlet channel 54 includes two channel parts respectively buried in the main body 51 and the separating member 52, and sealed valves are provided at the ports of the two parts of the channels at the connection. Among them, the sealing ring adopts a hollow rubber ring structure, and a number of adsorption ports are provided on the attachment surface. When the sealing ring is attached to the surface of the photovoltaic panel, the air inside the sealing ring is sucked to form a negative pressure, so as to firmly adsorb the separating member 52 on the surface of the photovoltaic panel and form a completely sealed chamber, avoiding water leakage during the immersion process and thus affecting the immersion effect.
[0046] The immersion chamber 53 is also connected with a return channel 55. The return channel 55 passes through a filtering device and is connected to the water tank to form a circulation loop; the water inlet channel 54 is connected to an extended spray head 56 at the port of the immersion chamber 53. The extended spray head 56 is located in the middle of the immersion chamber 53, and its spraying end is arranged close to the surface of the photovoltaic panel. During positioning and adsorption, align the large-sized stubborn dirt with the center of the separating member. Then, after the adsorption and installation are completed, the high-pressure water flow sprayed by the extended spray head can be directly aimed at the stubborn dirt for pressurized flushing. The water after flushing will flow along the return channel, pass through the filtration and then return to the water tank for recycling, greatly reducing the water consumption.
[0047] The return channel 55 also includes two channel parts respectively buried in the main body 51 and the separating member 52, and sealed valves are provided at the ports of the two parts of the channels at the connection. In this way, after the fixed-point flushing is completed, when the immersion chamber 53 is full of water, close the four sealed valves at the connection of the two channels, disconnect the connection relationship between the main body 51 and the separating member 52, and the separating member can be left on the surface of the photovoltaic panel to form a temporary immersion device to soak the particularly stubborn dirt for a certain period of time, so as to fully soften it and increase the possibility of its being cleaned.
[0048] Preferably, the humidifying and cleaning mechanism 2 further includes a visual module 21, which can identify large-sized adherents and can be used to drive any one of the brush roller module 4 and the plurality of flushing modules 5 to correspond to the residual adherents. By introducing the intelligent identification of adherents by the visual module, it can ensure that there is no omission in cleaning, and the cleaning condition of the surface of the photovoltaic panel can be seen more intuitively. For some special situations, the human eye can also judge the picture according to experience and complete the cleaning operation by manual operation.
[0049] A method for cleaning a photovoltaic panel by a sand and wind environment photovoltaic panel cleaning device specifically includes the following steps:
[0050] S1. According to the measured wind direction and wind force, analyze and obtain the crosswind and longitudinal downwind directions of the environmental wind in the plane of the photovoltaic panel array. Determine the starting movement direction of the longitudinal displacement module 6 within a single cleaning block based on the longitudinal downwind direction, and determine the starting cleaning block based on the crosswind direction, thereby generating a planned trajectory;
[0051] S2. Adjust the vertical relative position relationship between the blowing and sweeping mechanism 1 and the humidifying and cleaning mechanism 2 according to the planned trajectory and the actual situation of the environmental wind;
[0052] S3. With the blowing and sweeping mechanism 1 in the front and the humidifying and cleaning mechanism 2 in the rear, unidirectionally traverse a single cleaning block driven by the traveling mechanism. During the process, the blowing and sweeping mechanism 1 and the rolling brush module 4 perform cleaning operations synchronously; when the vision module 21 identifies large-sized adhesions, increase the pressing force when the wet brush head 41 passes through the adhesion;
[0053] S4. Keep the positions of the blowing and sweeping mechanism 1 and the humidifying and cleaning mechanism 2 unchanged, and traverse the cleaning block in the reverse direction. During the process, the rolling brush module 4 performs cleaning operations, and the blowing and sweeping mechanism 1 performs drying operations; after one blowing and sweeping, through two reciprocating humidifying and rolling brushes, the floating dust in the easily cleaned part is fully cleaned, and during the second humidifying and rolling brush, drying is closely followed. The wind field not only plays a drying role but also shields the sand and wind in the environmental wind, so that the photovoltaic panel contacts as little sand and wind with the panel surface as possible before drying. After being completely dried, the blown sand and wind are not easy to form adhesive accumulation, ensuring a better cleaning effect.
[0054] When the vision module 21 identifies large-sized adhesions, use the wet brush head 41 to perform fixed-point pressurized rolling on the adhesion; when residual adhesions can still be identified after the fixed-point pressurized rolling, use the flushing module 5 to first perform fixed-point flushing on the residual adhesion in the connected state, then separate the separating part 52 and leave it on the surface of the photovoltaic panel for fixed-point soaking, and the rest continues to complete the reverse traversal process to complete the reciprocating cleaning action of a single cleaning block;
[0055] S5. Replace to the adjacent cleaning block through the lateral displacement module 7;
[0056] S6. After completing the cleaning actions of multiple cleaning blocks, recover the separating part 52 that has reached the soaking duration, and perform fixed-point flushing and fixed-point pressurized rolling again;
[0057] Complete the cleaning operations within the interval composed of multiple consecutive cleaning blocks according to steps S1 - S6, repeat S1 - S6 to continue performing the cleaning operations within the adjacent interval until the cleaning operations on the entire surface of the photovoltaic panel array 3 are completed.
[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the above principles of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.
Claims
1. Photovoltaic panel cleaning device in sandy environment, characterized in that: It includes a traveling mechanism that can drive a sweeping and blowing mechanism (1) and a humidifying and cleaning mechanism (2) to travel on the surface of a photovoltaic panel array (3) along a planned trajectory, and sequentially complete the cleaning operations of multiple cleaning blocks in the lateral direction in the downwind direction, and complete the cleaning operation of a single cleaning block in the longitudinal direction by first traveling downwind and then traveling in the reverse direction; it also includes a sensing module for detecting the environmental wind direction for the traveling mechanism to generate the planned trajectory. The humidifying and cleaning mechanism (2) includes a rolling brush module (4) that can humidify and roll-brush the area swept by the sweeping and blowing mechanism (1); it also includes a separable flushing module (5) that can perform fixed-point flushing on the residues adhered after the rolling brush module (4) has been rolled multiple times; and when separated, it can form a sealed chamber for fixed-point soaking on the photovoltaic panel surface.
2. The photovoltaic panel cleaning device in a sandy and windy environment according to claim 1, wherein: The sweeping and blowing mechanism (1) includes a dust-sweeping brush head (11) that can sweep floating dust in the advancing direction of the traveling mechanism. Blowing structures are arranged on both sides of the dust-sweeping brush head (11), which can blow the swept floating dust out from one side of the sweeping and blowing mechanism (1), and this blowing side is the side away from the cleaned area, and the blowing direction of the floating dust is the same as the downwind direction of the environmental wind.
3. The photovoltaic panel cleaning device in a sand and wind environment according to claim 2, characterized in that: The blowing structure relatively close to the cleaned area side can generate a strong horizontal wind field, and the strong wind field blows through the dust-sweeping brush head (11) and the dust-raising area in front of it. The blowing structure relatively far from the cleaned area side can generate a weak wind field that forms an angle with the strong wind field. The direction of the weak wind field is biased towards the sweeping direction of the dust-sweeping brush head (11), and the strong wind field and the weak wind field converge on the side of the dust-sweeping brush head (11) away from the cleaned area.
4. The photovoltaic panel cleaning device in a sandy environment according to claim 1, characterized in that: The humidifying and cleaning mechanism (2) also includes a vision module (21) that can identify large-sized adhered substances and can be used to drive any one of the rolling brush module (4) and multiple flushing modules (5) to correspond to the residual adhered substances.
5. The photovoltaic panel cleaning device in a sandy environment according to claim 4, characterized in that: The rolling brush module (4) includes a wet brush head (41). When the wet brush head (41) is attached to the surface of the photovoltaic panel, it can rotate relative to the pressure-applying frame (43) under the action of the traveling mechanism, so as to roll relative to the surface of the photovoltaic panel; the pressure-applying frame (43) can lift and lower the wet brush head (41) relative to the surface of the photovoltaic panel array (3) to change the pressure applied by the wet brush head (41) on the photovoltaic panel; the wet brush head (41) can also rotate actively relative to the pressure-applying frame (43).
6. The photovoltaic panel cleaning device in a sandy environment according to claim 5, characterized in that: The flushing module (5) includes a main body (51) whose end can approach or move away from the surface of the photovoltaic panel array (3). A separating member (52) is provided at the end of the main body (51). There is a chamber inside the separating member (52), and an opening is provided at the end face close to the photovoltaic panel. A sealing ring is provided at the opening, and the sealing ring has an adsorption function. When the sealing ring is adsorbed and attached to the surface of the photovoltaic panel, the chamber inside the separating member (52) forms a soaking chamber (53); the soaking chamber (53) is connected to a water tank through a water inlet channel (54) and a water pump. The water inlet channel (54) includes two channel parts respectively buried in the main body (51) and the separating member (52), and sealing valves are provided at the ports of the two parts of the channels at the connection.
7. The photovoltaic panel cleaning device in a sandy environment according to claim 6, characterized in that: The soaking chamber (53) is further connected with a return channel (55). The return channel (55) passes through a filtering device and is connected to the water tank to form a circulation loop; the water inlet channel (54) is connected to an extended spray head (56) at the port of the soaking chamber (53). The extended spray head (56) is located in the middle of the soaking chamber (53), and its spraying end is arranged close to the surface of the photovoltaic panel.
8. The photovoltaic panel cleaning device in a sandstorm environment according to claim 1, wherein: The traveling mechanism includes a longitudinal displacement module (6) which can drive the sweeping and blowing mechanism (1) and the humidifying and cleaning mechanism (2) to move longitudinally back and forth; it further includes a transverse displacement module (7) which can drive the longitudinal displacement module (6) to move unidirectionally multiple times in the downwind direction on the surface of the photovoltaic panel array (3), and the transverse displacement module (7) can lift the longitudinal displacement module (6) away from the surface of the photovoltaic panel array (3); the sweeping and blowing mechanism (1) and the humidifying and cleaning mechanism (2) are connected to the longitudinal displacement module (6) through a rotating member, and the rotating member can rotate 180 degrees to adjust the up-and-down relative position relationship between the sweeping and blowing mechanism (1) and the humidifying and cleaning mechanism (2).
9. The method for cleaning a photovoltaic panel of the sand and wind environment photovoltaic panel cleaning device according to any one of claims 1-8, characterized in that, It includes the following steps: S1. According to the measured wind direction and wind force, analyze and obtain the transverse and longitudinal downwind directions of the environmental wind in the plane of the photovoltaic panel array. Determine the starting movement direction of the longitudinal displacement module (6) in a single cleaning block according to the longitudinal downwind direction, and determine the starting cleaning block according to the transverse downwind direction, so as to generate a planned trajectory. S2. Adjust the up-and-down relative position relationship between the sweeping and blowing mechanism (1) and the humidifying and cleaning mechanism (2) according to the planned trajectory and the actual situation of the environmental wind. S3. With the sweeping and blowing mechanism (1) in the front and the humidifying and cleaning mechanism (2) in the back, unidirectionally traverse a single cleaning block driven by the traveling mechanism. During the process, the sweeping and blowing mechanism (1) and the rolling brush module (4) perform cleaning operations synchronously; when the visual module (21) identifies a large-sized adhesion, increase the pressing force when the wet brush head (41) passes through the adhesion. S4. Keep the positions of the sweeping and blowing mechanism (1) and the humidifying and cleaning mechanism (2) unchanged, and traverse the cleaning block in the reverse direction. During this process, the roller brush module (4) performs the cleaning operation, and the sweeping and blowing mechanism (1) performs the drying operation. When the vision module (21) identifies a large-sized adhesion, use the wet brush head (41) to apply fixed-point increased pressure to the adhesion with the roller brush. When the residual adhesion can still be identified after the fixed-point increased pressure with the roller brush, use the flushing module (5) to first perform fixed-point flushing on the residual adhesion in the connected state, then separate the separating part (52) and leave it on the surface of the photovoltaic panel for fixed-point soaking, and the rest continues to complete the reverse traversal process to complete the reciprocating cleaning action of a single cleaning block; S5. Replace to the adjacent cleaning block through the lateral displacement module (7); S6. After completing the cleaning actions of multiple cleaning blocks, recover the separating part (52) that has reached the soaking duration, and perform fixed-point flushing and fixed-point increased pressure with the roller brush again; Complete the cleaning operation within the interval composed of multiple consecutive cleaning blocks according to steps S1 - S6, repeat S1 - S6 to continue performing the cleaning operation in the adjacent interval until the cleaning operation on the entire surface of the photovoltaic panel array (3) is completed.