Offshore photovoltaic cleaning device and floating type offshore photovoltaic platform

Abstract

The invention discloses an offshore photovoltaic cleaning device and a floating type offshore photovoltaic platform, the offshore photovoltaic cleaning device is applied to the floating type offshore photovoltaic platform, the offshore photovoltaic cleaning device comprises a seawater desalination device and an unmanned aerial vehicle, and the floating type offshore photovoltaic platform comprises a platform main body and a photovoltaic module arranged on the platform main body. The seawater desalination device is mounted on the platform main body; the unmanned aerial vehicle comprises a flying platform, a water storage tank and a pressure pump, the flying platform can be parked on the platform main body, the water storage tank is mounted on the flying platform, the pressure pump is mounted on the water storage tank, and the water storage tank is provided with a nozzle and a water inlet joint communicated with the seawater desalination device. The offshore photovoltaic cleaning device has the advantages of being low in cleaning cost and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to an offshore photovoltaic cleaning device and a floating offshore photovoltaic platform. Background Art

[0002] During the operation of floating offshore photovoltaic platforms, dust, salt precipitated from seawater, animal excrement, etc. will accumulate on the surface of photovoltaic modules, blocking and reflecting sunlight, reducing the total amount of solar radiation received by the batteries and causing lower power generation efficiency.

[0003] Floating offshore photovoltaic platforms are usually cleaned manually (dry cleaning or water cleaning) or by engineering vessels. However, due to the complex marine environment, the cleanliness of photovoltaic modules can only be maintained for a very short time. In addition, for floating offshore photovoltaic platforms located in the deep sea, manual cleaning and engineering vessel cleaning have the disadvantages of high cleaning costs and low efficiency. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides an offshore photovoltaic cleaning device, which has the advantages of low cleaning cost and high efficiency.

[0006] An embodiment of the present invention further provides a floating offshore photovoltaic platform.

[0007] The offshore photovoltaic cleaning device of the embodiment of the present invention is applied to a floating offshore photovoltaic platform, wherein the offshore photovoltaic cleaning device includes a seawater desalination device and an unmanned aerial vehicle. The floating offshore photovoltaic platform includes a platform body and a photovoltaic assembly arranged on the platform body, and the seawater desalination device is installed on the platform body; the unmanned aerial vehicle includes a flying platform, a water tank and a booster pump, the flying platform can be parked on the platform body, the water tank is installed on the flying platform, the booster pump is installed on the water tank, and the water tank is provided with a nozzle and a water inlet joint for connecting with the seawater desalination device.

[0008] According to the offshore photovoltaic cleaning device of the embodiment of the present invention, when the flying platform is parked on the platform body, the water tank is connected to the seawater desalination device through the water inlet joint, and the seawater desalination device can transport the fresh water formed after desalination to the water tank through the water inlet joint. When the photovoltaic module needs to be cleaned, the flying platform drives the water tank to fly according to the set trajectory, and at the same time, the pressure pump increases the internal pressure of the water tank, and the fresh water in the water tank is sprayed from the nozzle to the photovoltaic module at a higher pressure to achieve the cleaning of the photovoltaic module. Among them, the use of fresh water for cleaning effectively avoids the production of salt after the seawater cleans the photovoltaic module and shortens the cleaning cycle. The use of drones for cleaning is more convenient for fixed-point cleaning of dirty parts of the photovoltaic module. Compared with manual cleaning and engineering ship cleaning, the cleaning cost is lower and the efficiency is higher.

[0009] In some embodiments, the platform body includes a lower frame, a column and an upper frame connected in sequence from bottom to top, the lower frame is equipped with a floating body and the seawater desalination device, and the photovoltaic module is installed on the upper frame;

[0010] A parking platform and a locking member are provided on the upper frame or the column, and the locking member can lock the UAV parked on the parking platform.

[0011] In some embodiments, there are a plurality of columns, at least one of which defines a water storage cavity, and the water storage cavity is connected to the seawater desalination device;

[0012] The offshore photovoltaic cleaning device also includes a water pump and a water pipe. The water pump is connected in series to the water pipe. The end of the water pipe facing away from the water pump is connected to the parking platform. When the drone is locked on the parking platform, the water pipe is connected to the water tank.

[0013] In some embodiments, the offshore photovoltaic cleaning device also includes a liquid storage box, an infusion pipe and a control valve. The liquid storage box is used to store chemical solutions for cleaning bird droppings and salt stains. The infusion pipe connects the liquid storage box and the water pipe. The control valve is installed on the infusion pipe.

[0014] In some embodiments, the flying platform includes two horizontal support rods located below the water tank, and the parking platform is provided with two limit grooves, the limit grooves correspond to the horizontal support rods one by one, and the horizontal support rods can be fitted in the corresponding limit grooves;

[0015] The locking member includes a push rod and a driving device. The push rod is movably connected to the parking platform and has a first position avoiding the limiting groove and a second position covering part of the limiting groove. The driving device is installed on the parking platform and is transmission-connected to the push rod.

[0016] In some embodiments, the water inlet joint is arranged below the water storage tank, a through hole for inserting the water inlet joint is provided on the parking platform, and one end of the water pipe away from the water pump is connected to the lower end of the through hole.

[0017] In some embodiments, the drone also includes a camera module, which is installed on the flight platform.

[0018] In some embodiments, the parking platform is movably connected to the column and has a hidden position and an extended position. When the parking platform is in the hidden position, the parking platform and the drone are located between the upper frame and the lower frame. When the parking platform is in the extended position, the parking platform and the drone are located beside the upper frame.

[0019] In some embodiments, the parking platform is fixedly mounted on the side of the upper frame;

[0020] The offshore photovoltaic cleaning device also includes a protective shell, which is movably connected to the parking platform. The protective shell can surround the parking platform to form a sealed cavity for accommodating the drone.

[0021] The floating offshore photovoltaic platform according to an embodiment of the present invention includes the offshore photovoltaic cleaning device as described in any of the above embodiments.

[0022] The technical advantages of the floating offshore photovoltaic platform according to the embodiment of the present invention are the same as the technical advantages of the offshore photovoltaic cleaning device in the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an offshore photovoltaic cleaning device according to an embodiment of the present invention, wherein a drone is hidden.

[0024] Figure 2 is a front view of an offshore photovoltaic cleaning device according to an embodiment of the present invention, in which a drone is hidden.

[0025] Figure 3 is a schematic diagram of a drone in an offshore photovoltaic cleaning device according to an embodiment of the present invention.

[0026] Figure 4 is a front view of a drone in an offshore photovoltaic cleaning device according to an embodiment of the present invention.

[0027] Figure 5 is a side view of a drone in an offshore photovoltaic cleaning device according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Upper frame; 2. Column; 3. Lower frame; 4. UAV; 41. Flying platform; 411. Horizontal support rod; 42. Water storage tank; 43. Pressure pump; 44. Nozzle; 45. Water inlet joint; 46. Camera module; 5. Water pipe; 6. Parking platform; 61. Limiting groove; 62. Through hole; 7. Liquid storage box; 8. Infusion tube; 9. Water pump; 10. Float. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] Combine the following Figure 1-Figure 5 An offshore photovoltaic cleaning device according to an embodiment of the present invention is described.

[0032] The offshore photovoltaic cleaning device of the embodiment of the present invention is applied to a floating offshore photovoltaic platform. The offshore photovoltaic cleaning device includes a desalination device and a drone 4. The floating offshore photovoltaic platform includes a platform body and a photovoltaic module arranged on the platform body. The desalination device is installed on the platform body. The drone 4 includes a flying platform 41, a water tank 42 and a booster pump 43. The flying platform 41 can be parked on the platform body. The water tank 42 is installed on the flying platform 41. The booster pump 43 is installed on the water tank 42. The water tank 42 is provided with a nozzle 44 and a water inlet joint 45 for connecting with the desalination device (not shown in the figure).

[0033] According to the offshore photovoltaic cleaning device of the embodiment of the present invention, when the flying platform 41 is parked on the platform body, the water tank 42 is connected to the seawater desalination device through the water inlet joint 45, and the seawater desalination device can transport the fresh water formed after desalination to the water tank 42 through the water inlet joint 45. When it is necessary to clean the photovoltaic module, the flying platform 41 drives the water tank 42 to fly according to the set trajectory, and at the same time, the pressure pump 43 increases the internal pressure of the water tank 42, and the fresh water in the water tank 42 is sprayed to the photovoltaic module by the nozzle 44 at a greater pressure to achieve the cleaning of the photovoltaic module. Among them, the use of fresh water for cleaning effectively avoids the production of salt after the seawater cleans the photovoltaic module and shortens the cleaning cycle; the use of drone 4 for cleaning is more convenient for fixed-point cleaning of the dirty parts of the photovoltaic module. Compared with manual cleaning and engineering ship cleaning, the cleaning cost is lower and the efficiency is higher.

[0034] It should be noted that the floating offshore photovoltaic platform of this embodiment uses a float 10 to float on the sea level, and makes the photovoltaic components a certain distance above the sea level, so as to effectively reduce the probability of seawater submerging the photovoltaic components, thereby effectively reducing the probability of salt adhering to the photovoltaic components, and the cleaning cycle of the photovoltaic components is longer, thereby reducing the cleaning cost.

[0035] In some embodiments, Figure 1 and Figure 2 As shown, the platform body includes a lower frame 3, a column 2 and an upper frame 1 which are connected in sequence from bottom to top, a floating body 10 and a seawater desalination device are installed on the lower frame 3, and a photovoltaic module is installed on the upper frame 1. A parking platform 6 and a locking member are provided on the upper frame 1 or the column 2, and the locking member can lock the drone 4 parked on the parking platform 6.

[0036] After the drone 4 finishes cleaning the photovoltaic module, it will park on the parking platform 6 and be locked by the locking member, so as to effectively prevent the drone 4 from shaking or even falling off in a complex marine environment, and effectively ensure the service life of the drone 4. At the same time, the setting of the locking member also effectively ensures the reliable connection between the desalination device and the water tank 42, and ensures the reliable supply of liquid to the water tank 42.

[0037] Specifically, the floating body 10 is also arranged at the lower end of the column 2 to effectively increase the number and distribution area of ​​the floating body 10, and further ensure the floating reliability of the floating offshore photovoltaic platform in the sea water.

[0038] In some embodiments, Figure 2 As shown, there are multiple columns 2, at least one column 2 defines a water storage cavity, and the water storage cavity is connected to the seawater desalination device. The offshore photovoltaic cleaning device also includes a water pump 9 and a water pipe 5, the water pump 9 is connected in series to the water storage pipe 5, and the end of the water pipe 5 away from the water pump 9 is connected to the parking platform 6. When the drone 4 is locked on the parking platform 6, the water pipe 5 is connected to the water tank 42.

[0039] Using the inner cavity of at least one column 2 as a water storage cavity for storing fresh water can effectively store the fresh water generated by the seawater desalination device, and no box for water storage is required, thereby effectively reducing the water storage cost. The first end of the water pipe 5 extends into the water storage cavity, and the second end of the water pipe 5 is connected to the parking platform 6 and is used to communicate with the water inlet connector 45 in the water tank 42. After the second end of the water pipe 5 is connected to the water inlet connector 45 of the water tank 42, the water pump 9 works to pump the fresh water in the water storage cavity into the water tank 42, and the water filling operation of the water tank 42 is simple and convenient.

[0040] Specifically, the plurality of columns 2 include a central column, six intermediate columns, and twelve edge columns that are sequentially arranged from the inside to the outside, the six central columns are hexagonally distributed with the central column as the center, six edge columns among the twelve edge columns are hexagonally distributed with the central column as the center, and the remaining six edge columns are alternately arranged with the above six edge columns along the circumference of the central column. The parking platform 6 is arranged on the side of the platform body, and the inner cavity of an edge column adjacent to the parking platform 6 forms a water storage cavity.

[0041] In some embodiments, Figure 2As shown, the offshore photovoltaic cleaning device also includes a liquid storage box 7, a liquid infusion tube 8 and a control valve. The liquid storage box 7 is used to store chemical solutions for cleaning bird droppings and salt stains. The liquid infusion tube 8 connects the liquid storage box 7 and the water pipe 5. The control valve is installed on the liquid infusion tube 8.

[0042] That is, a high-concentration chemical solution can be pre-stored in the liquid storage box 7. After the photovoltaic module is cleaned with fresh water, if it is found that there are bird droppings and / or salt residues in some areas on the photovoltaic module that cannot be cleaned, the drone 4 can be parked on the parking platform 6, and the water inlet connector 45 of the water tank 42 is connected to the water pipe 5. Then, the water pump 9 and the control valve are started, and the fresh water and the high-concentration chemical solution will merge in the water pipe 5 and flow into the water tank 42 together, thereby forming a chemical solution of appropriate concentration, which is convenient for the drone 4 to reliably and quickly clean the bird droppings and / or salt stains.

[0043] Specifically, the control valve can be opened for a set time under the control of the controller to ensure that only a set volume of high-concentration chemical solution is injected into the water storage tank 42 each time.

[0044] In some embodiments, Figure 3-Figure 5 As shown, the flying platform 41 includes two horizontal support rods 411 located below the water tank 42, and two limit grooves 61 are provided on the parking platform 6. The limit grooves 61 correspond to the horizontal support rods 411 one by one, and the horizontal support rods 411 can be matched in the corresponding limit grooves 61. The locking member includes a push rod and a driving device. The push rod is movably connected to the parking platform 6 and has a first position avoiding the limit groove 61 and a second position covering part of the limit groove 61. The driving device is installed on the parking platform 6 and is transmission-connected to the push rod.

[0045] The flying platform 41 is stably placed on the parking platform 6 by two horizontal struts 411. The cooperation between the horizontal struts 411 and the limiting grooves 61 indicates that the UAV 4 is placed in place on the parking platform 6, and also realizes reliable horizontal limiting of the UAV 4. After the horizontal struts 411 are located in the limiting grooves 61, the driving device drives the push rod to move to the second position. The push rod located in the second position prevents the horizontal struts 411 from being separated from the limiting grooves 61, thereby effectively ensuring the reliability of the locking of the UAV 4 on the parking platform 6.

[0046] Specifically, the driving device can be a linear motor, which is connected to the push rod by transmission. After the horizontal support rod 411 is matched in the limiting groove 61, the water storage tank 42 is located above the parking platform 6 and adjacent to the upper surface of the parking platform 6.

[0047] In some embodiments, Figure 1 , Figure 4 and Figure 5As shown, the water inlet connector 45 is arranged below the water storage tank 42 , a through hole 62 for inserting the water inlet connector 45 is provided on the parking platform 6 , and one end of the water pipe 5 away from the water pump 9 is connected to the lower end of the through hole 62 .

[0048] At this time, after the drone 4 is placed at the set position of the parking platform 6, the water inlet joint 45 below the water tank 42 just extends into the through hole 62 and docks with the joint at the end of the water pipe 5 away from the water pump 9, thereby realizing the connection between the water pipe 5 and the water tank 42. The connection between the water pipe 5 and the water tank 42 is convenient and low in cost.

[0049] In some embodiments, Figure 3 As shown, the drone 4 also includes a camera module 46 , which is installed on the flight platform 41 .

[0050] When the drone 4 is cleaning the photovoltaic module, the camera module 46 can take real-time photos of the photovoltaic module, mark the difficult-to-clean locations, and further clean the difficult-to-clean locations. At the same time, the staff can also observe the cleaning status of the photovoltaic module in the cleaning area through the camera module 46, so that the staff can confirm whether there is a difficult-to-clean area, and then decide whether to use a chemical solution for further cleaning.

[0051] Specifically, along the flight direction of the drone 4, the nozzle 44 is located in front of the water tank 42, and the fresh water or chemical solution in the water tank 42 can be sprayed obliquely downward toward the photovoltaic module through the nozzle 44. The camera module 46 is located in front of the flight platform 41 and at the upper end of the nozzle 44.

[0052] In some embodiments, the parking platform 6 is movably connected to the column 2 and has a hidden position and an extended position. When the parking platform 6 is in the hidden position, the parking platform 6 and the drone 4 are located between the upper frame 1 and the lower frame 3. When the parking platform 6 is in the extended position, the parking platform 6 and the drone 4 are located beside the upper frame 1.

[0053] That is, when the drone 4 is not needed, the parking platform 6 on which the drone 4 is parked can be moved to a hidden position. Under the shielding of the columns 2, the upper frame 1 and the photovoltaic components, the drone 4 can be effectively prevented from being affected by excessive wind, rain and other environmental factors that may affect the service life of the drone 4.

[0054] Specifically, the parking platform 6 is slidably connected to the column 2 in the horizontal direction. The parking platform 6 is connected with a rack, which extends along the moving direction of the parking platform 6. A motor is installed on the column 2, and a gear is coaxially connected to the motor shaft of the motor, and the gear is meshed with the rack.

[0055] In some embodiments, the parking platform 6 is fixedly installed beside the upper frame 1. The offshore photovoltaic cleaning device also includes a protective shell, which is movably connected to the parking platform 6, and the protective shell can surround the parking platform 6 to form a sealed cavity for accommodating the drone 4.

[0056] That is, after the drone 4 is parked on the parking platform 6 , the protective shell can be buckled on top of the drone 4 to separate the drone 4 from the outside world, thereby effectively preventing the drone 4 from being disturbed by the outside environment and effectively increasing the service life of the drone 4 .

[0057] Specifically, the parking platform 6 is welded to the outer edge of the upper frame 1, and the parking platform 6 is at the same height as the upper frame 1. Alternatively, the parking platform is welded to the outer edge of the upper frame 1 through a vertical plate, and the parking platform 6 is lower than the height of the upper frame 1. After the drone 4 is parked on the parking platform 6, it is lower than the upper frame 1.

[0058] The floating offshore photovoltaic platform according to an embodiment of the present invention includes an offshore photovoltaic cleaning device as described in any of the above embodiments.

[0059] The technical advantages of the floating offshore photovoltaic platform according to the embodiment of the present invention are the same as the technical advantages of the offshore photovoltaic cleaning device in the above-mentioned embodiment, which will not be repeated here.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] 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.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 described specific features, structures, materials or characteristics 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 the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An offshore photovoltaic cleaning device, applied to a floating offshore photovoltaic platform, characterized in that: The offshore photovoltaic cleaning device comprises: A seawater desalination device, wherein the floating offshore photovoltaic platform comprises a platform body and photovoltaic components arranged on the platform body, and the seawater desalination device is installed on the platform body; The UAV comprises a flight platform, a water tank and a pressure pump. The flight platform can be parked on the platform body. The water tank is installed on the flight platform. The pressure pump is installed on the water tank. The water tank is provided with a nozzle and a water inlet joint for connecting with the seawater desalination device.

2. The offshore photovoltaic cleaning device according to claim 1, characterized in that: The platform body comprises a lower frame, a column and an upper frame which are sequentially connected from bottom to top, the lower frame is equipped with a floating body and the seawater desalination device, and the photovoltaic module is installed on the upper frame; A parking platform and a locking member are provided on the upper frame or the column, and the locking member can lock the UAV parked on the parking platform.

3. The offshore photovoltaic cleaning device according to claim 2, characterized in that: There are a plurality of columns, at least one of which defines a water storage cavity, and the water storage cavity is connected to the seawater desalination device; The offshore photovoltaic cleaning device also includes a water pump and a water pipe. The water pump is connected in series to the water pipe. The end of the water pipe facing away from the water pump is connected to the parking platform. When the drone is locked on the parking platform, the water pipe is connected to the water tank.

4. The offshore photovoltaic cleaning device according to claim 3, characterized in that: The offshore photovoltaic cleaning device also includes a liquid storage box, a liquid infusion pipe and a control valve. The liquid storage box is used to store chemical solutions for cleaning bird droppings and salt stains. The liquid infusion pipe connects the liquid storage box and the water pipe. The control valve is installed on the liquid infusion pipe.

5. The offshore photovoltaic cleaning device according to claim 2, characterized in that: The flying platform includes two horizontal support rods located below the water tank, and the parking platform is provided with two limit grooves, the limit grooves correspond to the horizontal support rods one by one, and the horizontal support rods can be matched in the corresponding limit grooves; The locking member includes a push rod and a driving device. The push rod is movably connected to the parking platform and has a first position avoiding the limiting groove and a second position covering part of the limiting groove. The driving device is installed on the parking platform and is transmission-connected to the push rod.

6. The offshore photovoltaic cleaning device according to claim 3, characterized in that: The water inlet joint is arranged below the water storage tank, the parking platform is provided with a through hole for inserting the water inlet joint, and one end of the water pipe away from the water pump is connected with the lower end of the through hole.

7. The offshore photovoltaic cleaning device according to claim 1, characterized in that: The unmanned aerial vehicle also includes a camera module, which is installed on the flight platform.

8. The offshore photovoltaic cleaning device according to claim 2, characterized in that: The parking platform is movably connected to the column and has a hidden position and an extended position. When the parking platform is located at the hidden position, the parking platform and the drone are located between the upper frame and the lower frame. When the parking platform is located at the extended position, the parking platform and the drone are located beside the upper frame.

9. The offshore photovoltaic cleaning device according to claim 2, characterized in that: The parking platform is fixedly installed on the side of the upper frame; The offshore photovoltaic cleaning device also includes a protective shell, which is movably connected to the parking platform. The protective shell can surround the parking platform to form a sealed cavity for accommodating the drone.

10. A floating offshore photovoltaic platform, characterized in that: It comprises an offshore photovoltaic cleaning device according to any one of claims 1-9.

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