Photovoltaic module and photovoltaic system

Abstract

The invention belongs to the field of photovoltaic module cleaning, and provides a photovoltaic module and a photovoltaic system.The photovoltaic module comprises a support assembly which comprises a first supporting column, a second supporting column, a supporting beam, an installation rod and supporting bases, the supporting bases are fixedly installed on the bottom faces of the first supporting column and the second supporting column, and the supporting beam is installed on the tops of the first supporting column and the second supporting column; a plurality of mounting rods are arrayed on the surfaces of the plurality of supporting beams; the plurality of photovoltaic panels are laid on the surface of the mounting rod in an array manner; a cleaning assembly; by arranging the support assembly, the photovoltaic panel and the cleaning assembly, the device performs water spraying cleaning according to a preset program and the dust covering degree of the photovoltaic panel and sprays proper water, dust can be effectively removed, meaningless waste of water resources is avoided, and water resource consumption is remarkably reduced.

Description

Technical Field

[0001] The invention belongs to the field of photovoltaic component cleaning, in particular to a photovoltaic component and a photovoltaic system. Background Art

[0002] With the continuous advancement of photovoltaic technology, the conversion efficiency of photovoltaic modules has gradually increased, and the cost has continued to decline, making photovoltaic power generation increasingly competitive in the energy market. In the actual operating environment, the surface cleanliness of photovoltaic modules directly affects their photoelectric conversion efficiency; photovoltaic modules are exposed outdoors and will inevitably be affected by pollutants such as dust, sand, bird droppings, and leaves. The accumulation of dust and other impurities on the surface of photovoltaic panels will reduce the transmittance of sunlight, hinder the effective contact between photons and cells, and thus reduce the photoelectric conversion efficiency.

[0003] When the dust coverage on the surface of photovoltaic panels reaches a certain level, such as 10% to 20%, the power generation efficiency may be reduced by 10% to 30% or even more. In order to ensure that photovoltaic modules always maintain high power generation efficiency and stable operating performance, it is crucial to clean them regularly.

[0004] Existing mechanical cleaning methods usually use a water spray cleaning system with fixed nozzles. Fixed nozzles are not efficient in water resource utilization, which will cause water waste and are difficult to apply in arid areas or places with water shortages.

[0005] To this end, those skilled in the art have proposed a photovoltaic module and a photovoltaic system to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a photovoltaic module and a photovoltaic system to solve the problem that the mechanical cleaning method in the prior art usually adopts a water spray cleaning system with a fixed nozzle, and the fixed nozzle is not efficient in water resource utilization, which will cause water resource waste.

[0007] A photovoltaic assembly, comprising: a bracket assembly, comprising a first support column, a second support column, a support beam, a mounting rod and a support seat, wherein the first support column and the second support column are both fixedly mounted with a support seat on their bottom surfaces, the first support column and the second support column are mounted with a support beam on their tops, and a plurality of mounting rods are arrayed on the surfaces of the support beams;

[0008] Photovoltaic panels, a number of which are laid in an array on the surface of the mounting pole;

[0009] A cleaning component includes a guide rail, a slide, a driving component, a vertical pole, a water guide pipe, a water guide plate and a liquid pump; the guide rail is fixed to the rear end face of the first support column, the slide is installed on the guide rail, the vertical pole is fixed to the side wall of the slide, and the water guide pipe is installed in the vertical pole, one end of the water guide pipe is connected to the water guide plate, the water guide plate faces the photovoltaic panel, the liquid pump is installed on the vertical pole, and the driving component controls the displacement of the slide.

[0010] Preferably, the driving assembly includes a base plate, a rack and a servo motor; the base plate is fixed to the rear end face of the first support column; the rack is installed on the bottom surface of the base plate, an assembly plate is fixedly installed on the surface of the slide seat, a servo motor is installed on the surface of the assembly plate, a rotating rod is connected to the output end of the servo motor, a driving tooth is installed at one end of the rotating rod, and the driving tooth is meshed with the rack.

[0011] Preferably, a plurality of water spray holes are arranged in an array on the bottom surface of the water guide plate, and a connecting frame is installed between the water guide plate and the vertical pole, and a fastening knob is installed on the side wall of the connecting frame.

[0012] Preferably, connecting plates are fixed to both side walls of the upright pole, mounting holes are provided between the assembly plate and the connecting plates, and bolts are installed at the mounting holes.

[0013] Preferably, a first oblique rod is fixedly connected between the first support column and the support beam, and a second oblique rod is fixedly connected between the second support column and the support beam.

[0014] Preferably, the photovoltaic panel includes a battery cell, a packaging film, a glass cover plate and a frame, and a junction box and a controller are installed on the bottom surface of the photovoltaic panel; a dust sensor is installed on the surface of the glass cover plate, and a position sensor is installed on the top of the vertical pole; the dust sensor, position sensor, servo motor and liquid pump are all electrically connected to the controller.

[0015] A photovoltaic system: comprising a photovoltaic panel, a sensor module, a control module and a cleaning component;

[0016] The cleaning assembly is mounted above the photovoltaic panel and sprays and cleans the photovoltaic panel;

[0017] The sensor module includes a dust sensor and a position sensor, and the dust sensor monitors dust on the surface of the photovoltaic panel;

[0018] The position sensor monitors the position of the cleaning assembly displaced on the top of the photovoltaic panel;

[0019] The control module receives the signal from the sensor module and controls the operation of the cleaning component.

[0020] Preferably, the control module is installed below the photovoltaic panel and is connected to the dust sensor and the position sensor via a data line.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention is provided with a support assembly, a photovoltaic panel and a cleaning assembly. When there is less dust, the device sprays water for cleaning according to the preset program and the degree of dust covering the photovoltaic panel, and sprays just the right amount of water, which can effectively remove dust and avoid unnecessary waste of water resources, thereby significantly reducing water resource consumption. When there is more dust and only a local area is polluted, the cleaning assembly performs centralized cleaning on the polluted parts, which greatly avoids the waste of water resources in unpolluted areas and realizes efficient use of water resources. The present invention is particularly suitable for areas where water resources are relatively scarce or for operation scenarios of large-scale photovoltaic power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a front structural schematic diagram of the present invention;

[0025] Figure 3 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0026] Figure 4 for Figure 3 A partial enlarged view of part A;

[0027] Figure 5 It is a right view structural schematic diagram of the present invention.

[0028] In the figure:

[0029] 1. First support column; 2. Second support column; 3. Support beam; 4. Mounting rod; 5. Photovoltaic panel; 6. First diagonal rod; 7. Second diagonal rod; 8. Support seat; 9. Guide rail; 10. Bottom plate; 11. Rack; 12. Slide seat; 13. Assembly plate; 14. Vertical rod; 15. Connecting piece; 16. Mounting hole; 17. Water guide pipe; 18. Water guide plate; 19. Water spray hole; 20. Connecting frame; 21. Servo motor; 22. Rotating rod; 23. Driving gear; 24. Liquid pump. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0031] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown: The present invention provides a photovoltaic assembly, including a bracket assembly, a photovoltaic panel 5 and a cleaning assembly;

[0032] The bracket assembly includes a first support column 1, a second support column 2, a support beam 3, a mounting rod 4 and a support seat 8. The bottom surfaces of the first support column 1 and the second support column 2 are fixedly mounted with the support seat 8. The support beam 3 is mounted on the top of the first support column 1 and the second support column 2. A plurality of mounting rods 4 are arrayed on the surface of the plurality of support beams 3. Through the first support column 1, the second support column 2, the support beam 3, the mounting rod 4 and the support seat 8, a bracket for stably supporting the photovoltaic panel 5 can be quickly formed to ensure that the photovoltaic panel 5 can be stably installed in the corresponding position.

[0033] A plurality of photovoltaic panels 5 are laid in an array on the surface of the mounting pole 4;

[0034] As attached Figure 4 and attached Figure 5 As shown: the cleaning assembly includes a guide rail 9, a slide 12, a driving assembly, a vertical rod 14, a water pipe 17, a water guide plate 18 and a liquid pump 24; the guide rail 9 is fixed to the rear end face of the first support column 1, the slide 12 is installed at the guide rail 9, the vertical rod 14 is fixed at the side wall of the slide 12, and the water pipe 17 is installed in the vertical rod 14, one end of the water pipe 17 is connected to the water guide plate 18, the water guide plate 18 faces the photovoltaic panel 5, the liquid pump 24 is installed at the vertical rod 14, and the driving assembly controls the displacement of the slide 12; connecting pieces 15 are fixed to both side walls of the vertical rod 14, and mounting holes 16 are provided between the assembly plate 13 and the connecting piece 15, and bolts are installed at the mounting holes 16; the vertical rod 14 can be erected at the rear end of the photovoltaic panel 5 through the first support column 1, and supported to the top of the photovoltaic panel 5, and high-pressure spraying is performed along the top of the photovoltaic panel 5 to quickly clean the dust or debris at the corresponding position, and after cleaning, the sewage can also fall along the photovoltaic panel 5;

[0035] The movement of the slide 12 can be controlled by the driving assembly. The slide 12 quickly moves along the guide rail 9 to the position where spraying is required, and quickly sprays the photovoltaic panel 5 at the corresponding position.

[0036] The driving assembly includes a base plate 10, a rack 11 and a servo motor 21; the base plate 10 is fixed to the rear end face of the first support column 1; the rack 11 is installed on the bottom surface of the base plate 10, and the assembly plate 13 is fixedly installed on the surface of the slide 12, and the servo motor 21 is installed on the surface of the assembly plate 13, and the output end of the servo motor 21 is connected to a rotating rod 22, and one end of the rotating rod 22 is installed with a driving tooth 23, and the driving tooth 23 is meshed with the rack 11; by controlling the servo motor 21, the servo motor 21 drives the rotating rod 22 and the driving tooth 23 to rotate, and the driving tooth 23 cooperates with the rack 11, so that the slide 12, the assembly plate 13 and the vertical pole 14 move, and when the vertical pole 14 moves to the corresponding position, the liquid pump 24 works to pump the external water source into the water guide plate 18 through the water guide pipe 17, and sprays it out from the water spray hole 19, and the water body quickly sprays and cleans the surface of the photovoltaic panel 5, and cleans the dirty photovoltaic panel 5, effectively avoiding the waste of water resources;

[0037] Since the photovoltaic panels 5 are installed in an array, the cleaning component can be well adapted thereto. When a dust sensor at a certain location detects that the photovoltaic panel 5 at the corresponding location is dirty, the driving component can accurately control the slide 12 to move to the specified position and spray and clean the area in a targeted manner, which can not only meet the cleaning needs of large-scale array photovoltaic panels 5, but also avoid unnecessary comprehensive cleaning of the entire photovoltaic array, thereby improving the flexibility and accuracy of cleaning and reducing the wear and energy consumption of the equipment.

[0038] The meshing transmission mode of the servo motor 21 in the driving assembly and the rack 11 installed on the bottom surface of the base plate 10, combined with the real-time monitoring of the position sensor, can realize the precise displacement control of the slide 12 on the guide rail 9; whether it is a long-distance movement on the top of the photovoltaic panel 5 or in the precise positioning process for the dirty area, it can ensure that the cleaning component accurately reaches the predetermined position with minimal error, ensuring the reliability and stability of the cleaning effect. For example, in a large photovoltaic array, even if the number of photovoltaic panels 5 is large and the arrangement is complex, the cleaning component can accurately operate each photovoltaic panel 5 that needs to be cleaned without omission or deviation.

[0039] The wires of the servo motor 21 can be stably connected by installing a cable reel on the side of the support column, and the device can also be powered by installing an independent power supply on the assembly plate 13.

[0040] A first diagonal rod 6 is fixedly connected between the first support column 1 and the support beam 3, and a second diagonal rod 7 is fixedly connected between the second support column 2 and the support beam 3; by arranging the first diagonal rod 6 and the second diagonal rod 7, the first support column 1 and the second support column 2 have a good supporting effect; and the device can be fixed to the ground through the support seat 8.

[0041] There are a number of water spray holes 19 arrayed on the bottom surface of the water guide plate 18, and a connecting frame 20 is installed between the water guide plate 18 and the vertical pole 14, and a fastening knob is installed on the side wall of the connecting frame 20; by setting the connecting frame 20 and the fastening knob, after the water guide plate 18 is installed, the water guide plate 18 can be adjusted to a position facing the photovoltaic panel 5 to ensure accurate spray cleaning.

[0042] The photovoltaic panel 5 includes a battery cell, a packaging film, a glass cover and a frame, and a junction box and a controller are installed on the bottom surface of the photovoltaic panel 5; a dust sensor is installed on the surface of the glass cover, and a position sensor is installed on the top of the vertical pole 14. The dust sensor, position sensor, servo motor 21 and liquid pump 24 are all electrically connected to the controller.

[0043] The photovoltaic system includes photovoltaic panels, sensor modules, control modules and cleaning components;

[0044] The cleaning assembly is mounted above the photovoltaic panel and sprays and cleans the photovoltaic panel;

[0045] The sensor module includes a dust sensor and a position sensor. The dust sensor is installed on the surface of the glass cover plate and monitors the dust on the surface of the photovoltaic panel. The position sensor is installed on the top of the vertical pole 14, and the vertical pole 14 monitors the displacement position of the cleaning component on the top of the photovoltaic panel.

[0046] The control module receives the signal from the sensor module and controls the operation of the cleaning component.

[0047] The control module is installed under the photovoltaic panel and is connected to the dust sensor and the position sensor through a data line.

[0048] After the photovoltaic system is started, the dust sensor installed on the surface of the photovoltaic panel 5 glass cover begins to monitor the dust coverage on the surface of the photovoltaic panel 5 in real time. At the same time, the position sensor installed on the top of the vertical pole 14 monitors the position information of the cleaning component displacement on the top of the photovoltaic panel 5 at any time.

[0049] The dust sensor installed on the surface of the glass cover of the photovoltaic panel 5 monitors the dust condition in real time, and can timely and accurately judge the cleaning needs of the surface of the photovoltaic panel 5. When there is a lot of dust, the cleaning component can respond quickly and perform targeted and powerful cleaning; when there is less dust, a timed and small amount of water spraying method is adopted to avoid the problem of excessive cleaning or untimely cleaning, and always keep the photovoltaic panel 5 in a state of high light absorption efficiency, thereby effectively improving the efficiency of photovoltaic power generation.

[0050] For example, in an environment with a lot of dust, after strong cleaning, the power generation efficiency of the photovoltaic panel 5 can be restored to a level close to that when it is not covered with dust. Compared with the photovoltaic panel 5 that is not cleaned in time, the power generation efficiency can be increased by 20% to 30%; with regular cleaning and maintenance in an environment with less dust, the power generation efficiency can also be ensured to be stable in the long term, reducing the gradual decline in efficiency caused by dust accumulation.

[0051] The entire cleaning process is automatically controlled by the control module according to the dust sensor and the position sensor signal installed on the top of the pole 14 to control the operation of the drive assembly and the liquid pump 24, without human intervention, thereby improving the cleaning efficiency and reducing the labor cost and the risk of damage to the photovoltaic panel 5 caused by improper human operation; for example, in a large photovoltaic power station, the number and workload of cleaning personnel can be greatly reduced, while ensuring the consistency and high quality of the cleaning work.

[0052] Embodiment 1: When there is less dust, the system sets a timed cleaning program, and starts the cleaning process at a preset longer time interval, for example, every 7 days. The specific time can be adjusted according to the site conditions. When the set time is reached, the controller starts the cleaning program.

[0053] The controller first controls the driving assembly to work. After receiving the signal, the servo motor 21 drives the rotating rod 22 and the driving gear 23 to rotate. Since the driving gear 23 is engaged with the rack 11 installed on the bottom surface of the base plate 10, the slide 12 moves along the guide rail 9 to the starting end position of the photovoltaic panel 5 array. The position sensor feeds back the position of the slide 12 to the controller in real time to ensure its accurate positioning.

[0054] After the slide 12 is in place, the liquid pump 24 is started and runs at a lower power, such as 20%-30% of the normal power, to draw a small amount of water into the water guide plate 18 through the water guide pipe 17 and spray it out from the water spray hole 19 to clean the surface of all photovoltaic panels 5 with a small amount of water. Since it is a regular cleaning with less dust, a small amount of water spray is sufficient to remove slight dust accumulation and avoid water resource waste.

[0055] During the spraying process, the servo motor 21 drives the slide 12 to move along the guide rail 9 at a preset slow speed, so that the water guide plate 18 can sequentially clean the surfaces of all photovoltaic panels 5. When the slide 12 moves to the other end edge of the photovoltaic panel 5 array, the controller first stops the liquid pump 24, and then controls the servo motor 21 to move the cleaning assembly back to the starting parking position, waiting for the next scheduled cleaning or cleaning instruction when there is a lot of dust.

[0056] Example 2: Local pollution monitoring and triggering when there is a lot of dust:

[0057] When a dust sensor at a certain location detects that the photovoltaic panel 5 at the corresponding position is dirty, that is, the dust coverage area exceeds the set severe pollution threshold such as 20%, the signal is transmitted to the controller, and the controller immediately starts a targeted cleaning process.

[0058] According to the position information of the dust sensor, the controller controls the driving assembly to move the cleaning assembly to the starting position above the area where the dirty photovoltaic panel 5 is located. The servo motor 21 cooperates with the rack 11 through the rotating rod 22 and the driving teeth 23 to quickly and accurately position the slide 12; the position sensor ensures that the slide 12 reaches the specified position.

[0059] After the cleaning assembly is positioned, the controller controls the liquid pump 24 to enter a strong cleaning mode, and increases the power of the liquid pump 24 to a higher level, such as 80% to 100% of the normal power, to increase the water spray pressure and flow, in preparation for strong flushing of the dirty photovoltaic panel 5.

[0060] The servo motor 21 drives the slide 12 to move back and forth rapidly along the guide rail 9 in the area of ​​the dirty photovoltaic panel 5. The water guide plate 18 continuously sprays high-pressure water to strongly flush the surface of the photovoltaic panel 5 in this area, quickly washing away a large amount of dust and dirt. The position sensor accurately monitors the position and moving speed of the slide 12 to ensure that there are no dead angles in the cleaning and that the moving path is accurately within the dirty area.

[0061] When the dust sensor detects that the dust on the surface of the photovoltaic panel 5 in the area meets the cleaning standard, such as when the dust coverage area is less than 5%, the controller stops the liquid pump 24 and then controls the servo motor 21 to move the cleaning component to the initial parking position or wait for the cleaning instruction of the next dirty area. If dust sensors at other positions detect new dirty photovoltaic panels 5 during the cleaning process, the cleaning component will perform targeted cleaning on the new dirty area according to the above process after completing the cleaning of the current area.

[0062] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0063] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0067] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0068] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic module, characterized in that: include: A support assembly, comprising a first support column (1), a second support column (2), a support beam (3), a mounting rod (4) and a support seat (8), wherein the bottom surfaces of the first support column (1) and the second support column (2) are fixedly mounted with a support seat (8), the tops of the first support column (1) and the second support column (2) are mounted with a support beam (3), and a plurality of mounting rods (4) are arrayed on the surfaces of the plurality of support beams (3); Photovoltaic panels (5), a plurality of the photovoltaic panels (5) are laid in an array on the surface of the mounting pole (4); A cleaning assembly comprises a guide rail (9), a slide seat (12), a driving assembly, a vertical pole (14), a water guide pipe (17), a water guide plate (18) and a liquid pump (24); the guide rail (9) is fixed to the rear end surface of a first support column (1), the slide seat (12) is installed on the guide rail (9), the vertical pole (14) is fixed to the side wall of the slide seat (12), and the water guide pipe (17) is installed in the vertical pole (14), one end of the water guide pipe (17) is connected to the water guide plate (18), the water guide plate (18) faces the photovoltaic panel (5), the liquid pump (24) is installed on the vertical pole (14), and the driving assembly controls the displacement of the slide seat (12).

2. A photovoltaic module according to claim 1, characterized in that: The driving assembly comprises a base plate (10), a rack (11) and a servo motor (21); the base plate (10) is fixed to the rear end face of the first support column (1); the rack (11) is installed on the bottom surface of the base plate (10); an assembly plate (13) is fixedly installed on the surface of the slide seat (12); the servo motor (21) is installed on the surface of the assembly plate (13); the output end of the servo motor (21) is connected to a rotating rod (22); one end of the rotating rod (22) is installed with a driving tooth (23); the driving tooth (23) is meshed with the rack (11).

3. A photovoltaic module according to claim 2, characterized in that: A plurality of water spray holes (19) are arranged in an array on the bottom surface of the water guide plate (18), a connecting frame (20) is installed between the water guide plate (18) and the vertical rod (14), and a fastening knob is installed on the side wall of the connecting frame (20).

4. A photovoltaic module according to claim 3, characterized in that: Connecting plates (15) are fixed to both side walls of the upright pole (14), mounting holes (16) are provided between the assembly plate (13) and the connecting plates (15), and bolts are installed at the mounting holes (16).

5. A photovoltaic module according to claim 1, characterized in that: A first oblique rod (6) is fixedly connected between the first support column (1) and the support beam (3), and a second oblique rod (7) is fixedly connected between the second support column (2) and the support beam (3).

6. A photovoltaic module according to claim 1, characterized in that: The photovoltaic panel (5) comprises a battery cell, a packaging film, a glass cover plate and a frame, and a junction box and a controller are installed on the bottom surface of the photovoltaic panel (5); a dust sensor is installed on the surface of the glass cover plate, and a position sensor is installed on the top of the vertical pole (14); the dust sensor, the position sensor, the servo motor (21) and the liquid pump (24) are all electrically connected to the controller.

7. A photovoltaic system, used in conjunction with any one of the photovoltaic modules according to claims 1 to 6, characterized in that: It includes photovoltaic panels, sensor modules, control modules and cleaning components; The cleaning assembly is mounted above the photovoltaic panel and sprays and cleans the photovoltaic panel; The sensor module includes a dust sensor and a position sensor, and the dust sensor monitors dust on the surface of the photovoltaic panel; The position sensor monitors the position of the cleaning assembly displaced on the top of the photovoltaic panel; The control module receives the signal from the sensor module and controls the operation of the cleaning component.

8. A photovoltaic system according to claim 7, characterized in that: The control module is installed below the photovoltaic panel and is connected to the dust sensor and the position sensor via a data line.

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