Apparatus and method for cleaning photovoltaic module

Abstract

Disclosed is an apparatus and method for cleaning a photovoltaic module. The apparatus for cleaning a photovoltaic module comprises: a gas transmission pipe assembly, which may be connected to a gas source; a rotating shaft, the rotating shaft comprising a rotating shaft body and a rotation driving member which is used for driving the rotating shaft to rotate, the rotating shaft body being rotatably connected to the gas transmission pipe assembly, and the rotating shaft body being provided with a gas flow channel which may communicate with the gas transmission pipe assembly; a nozzle, which is provided on the rotating shaft body, the nozzle communicating with the gas flow channel, the spraying direction of the nozzle being parallel to the plane on which the photovoltaic module is located; and a central controller, which is in signal connection with the rotation driving member.

Description

Photovoltaic module cleaning device and method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310881456.2 filed in China on July 18, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of photovoltaic module cleaning, and in particular to a photovoltaic module cleaning device and method. Background Art

[0004] In recent years, my country's new energy development has been advancing by leaps and bounds. More and more new energy power stations represented by photovoltaic power generation have been built, involving almost all provinces and regions, especially in the northwestern region with abundant light resources, where the number of photovoltaic power stations has grown rapidly.

[0005] However, in some harsh environmental areas such as the northwest desert Gobi region and the northern cold regions, photovoltaic panels are often covered by dust, snow, frost and other coverings. On the one hand, the coverings block the photovoltaic modules and reduce the power generation of the photovoltaic modules. On the other hand, the coverings also challenge the bearing capacity of the photovoltaic brackets, causing fatigue wear or deformation of the photovoltaic brackets, shortening the service life of the photovoltaic modules.

[0006] Therefore, how to increase the power generation of photovoltaic modules and extend the service life of photovoltaic modules is a technical problem that those skilled in the art currently need to solve.

[0007] Summary of the Invention

[0008] In view of this, the purpose of the present disclosure is to provide a photovoltaic module cleaning device and method to improve the power generation of the photovoltaic module and extend the service life of the photovoltaic module.

[0009] In order to achieve the above objectives, the first embodiment of the present disclosure provides:

[0010] A photovoltaic module cleaning device, comprising:

[0011] A gas pipeline assembly capable of communicating with a gas source;

[0012] A rotating shaft, the rotating shaft comprising a rotating shaft body and a rotating driving member for driving the rotating shaft to rotate, the rotating shaft body being rotatably connected to the gas pipeline assembly, and the rotating shaft body being provided with a gas flow channel capable of communicating with the gas pipeline assembly;

[0013] a nozzle, disposed on the rotating shaft body, the nozzle being in communication with the gas flow channel, and the spraying direction of the nozzle being parallel to the plane where the photovoltaic assembly is located;

[0014] The central controller is connected to the rotation drive member via a signal.

[0015] In some embodiments, the photovoltaic component cleaning device further includes a light intensity sensor, which is disposed on the photovoltaic component and transmits signals to the central controller.

[0016] In some embodiments, the photovoltaic assembly cleaning device further includes an electric valve, which is arranged between the nozzle and the gas pipeline assembly, and the electric valve transmits signals to the central controller.

[0017] In some embodiments, in the photovoltaic assembly cleaning device, the gas pipeline assembly includes:

[0018] A first gas pipeline is provided below the photovoltaic module and runs through the entire photovoltaic array;

[0019] The second gas pipeline is arranged perpendicular to the first gas pipeline, the nozzle is arranged on the second gas pipeline, and the electric valve is arranged on the second gas pipeline.

[0020] In some embodiments, in the photovoltaic module cleaning device described above, the nozzle is disposed on the rotating shaft body via a nozzle fixing member, and the nozzle fixing member is provided with a nozzle flow channel connecting the nozzle and the rotating shaft body;

[0021] The nozzle fixing member and the nozzle both transmit signals to the central controller, so that the central controller controls the airflow intensity, airflow frequency, airflow temperature and airflow type in the nozzle flow channel and the nozzle.

[0022] In some embodiments, in the photovoltaic assembly cleaning device described above, a rotation scale line is provided on the rotating shaft body, and an angle identification line that matches the rotation scale line is provided on the nozzle fixing member.

[0023] In some embodiments, in the photovoltaic module cleaning device described above, the photovoltaic module cleaning device further comprises an air pump, and the air delivery pipeline assembly is connected to the air pump;

[0024] And / or, the central controller controls the nozzle to spray pulsed airflow.

[0025] In order to achieve the above objectives, the second embodiment of the present disclosure provides:

[0026] A photovoltaic module cleaning method comprises the following steps:

[0027] S1: connecting the gas pipeline assembly to the gas source so that the air flow ejected from the nozzle impacts and cleans the covering;

[0028] S2: The central controller controls the rotation of the rotating shaft body so that the nozzle rotates while spraying airflow, thereby increasing the airflow spraying area.

[0029] In some embodiments, the photovoltaic assembly cleaning method further includes the following steps before step S1:

[0030] SA1: collecting light intensity information on the photovoltaic module through a light intensity sensor, and converting the light intensity information into an electrical signal and transmitting it to a central controller;

[0031] SA2: The central controller analyzes the received electrical signal to determine whether the photovoltaic module is blocked. If so, step SA3 is executed; otherwise, the process ends.

[0032] SA3: The central controller locates the positions of the photovoltaic components to be cleaned according to the obstruction conditions of the photovoltaic components and generates a cleaning list, where each obstructed photovoltaic component corresponds to a cleaning task in the cleaning list.

[0033] In some embodiments, the photovoltaic assembly cleaning method further includes step SA4 after step SA3:

[0034] The central controller controls the electric valve corresponding to the first cleaning task in the cleaning list to open, so as to clean the photovoltaic component corresponding to the first cleaning task.

[0035] In some embodiments, the photovoltaic assembly cleaning method further includes the following steps after step S2:

[0036] S2A1: Determine whether the first cleaning task in the cleaning list is completed. If yes, execute step S2A2; if not, return to execute step S1;

[0037] S2A2: Update the cleaning list;

[0038] S2A3: Determine whether the cleaning list is cleared. If so, end the process. If not, return to step SA4.

[0039] When using the photovoltaic module cleaning device provided by the embodiment of the present disclosure, since the rotating shaft body is provided with a gas flow channel that can be connected to the gas pipeline assembly, the nozzle is arranged on the rotating shaft body, and the nozzle is connected to the gas flow channel, and the spray direction of the nozzle is parallel to the plane where the photovoltaic module is located, therefore, when the gas pipeline assembly is connected to the gas source, the gas source can flow through the gas pipeline assembly, the gas flow channel of the rotating shaft body and the nozzle in sequence, and finally spray the airflow through the nozzle, and the high-speed airflow impacts the covering on the photovoltaic module to achieve cleaning of the covering; since the rotating shaft body is rotatably connected to the gas pipeline assembly, the nozzle is arranged on the rotating shaft body, and the central controller is connected to the rotating drive member signal, therefore, the central controller can control the rotating drive member, so that the rotating drive member drives the rotating shaft body to rotate, and drives the nozzle to rotate accordingly. Based on the rotation of the nozzle, the area swept by the airflow sprayed by the nozzle covers the entire surface of the photovoltaic module, and all the coverings on the surface of the photovoltaic module are removed.

[0040] It can be seen that the photovoltaic module cleaning device provided in the embodiment of the present disclosure can remove the covering on the photovoltaic module, reduce the obstruction to the photovoltaic module, and increase the power generation of the photovoltaic module; at the same time, the load-bearing weight of the photovoltaic bracket is reduced, which extends the service life of the photovoltaic bracket, thereby extending the service life of the entire photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] FIG1 is a schematic structural diagram of a photovoltaic module cleaning device provided by an embodiment of the present disclosure when cleaning a photovoltaic module;

[0043] FIG2 is a schematic structural diagram of a nozzle provided by an embodiment of the present disclosure being installed on a rotating shaft through a nozzle fixing member;

[0044] FIG3 is a schematic structural diagram of a gas pipeline assembly provided by an embodiment of the present disclosure;

[0045] FIG4 is a schematic diagram of the jet airflow when the first nozzle provided in an embodiment of the present disclosure is sprayed onto a photovoltaic module;

[0046] FIG5 is a schematic diagram of the jet airflow when the second nozzle provided in an embodiment of the present disclosure is sprayed onto a photovoltaic module;

[0047] FIG6 is a schematic diagram of the jet airflow when the third nozzle according to an embodiment of the present disclosure is sprayed onto a photovoltaic module;

[0048] FIG7 is a schematic diagram of a first nozzle angle adjustment range provided by an embodiment of the present disclosure;

[0049] FIG8 is a schematic diagram of a second nozzle angle adjustment range provided by an embodiment of the present disclosure;

[0050] FIG9 is a schematic diagram of a third nozzle angle adjustment range provided by an embodiment of the present disclosure;

[0051] FIG10 is a schematic flow chart of a photovoltaic module cleaning method provided in an embodiment of the present disclosure.

[0052] Among them, 100 is a gas pipeline assembly, 101 is a first gas pipeline, 102 is a second gas pipeline, 200 is a rotating shaft, 201 is a rotating scale line, 300 is a nozzle, 301 is a nozzle fixing part, 302 is a jet airflow, 3011 is an angle marking line, 400 is an electric valve, 500 is a photovoltaic component, and 501 is a covering. DETAILED DESCRIPTION

[0053] In view of this, the core of the present disclosure is to provide a photovoltaic module cleaning device and method to improve the power generation of the photovoltaic module and extend the service life of the photovoltaic module.

[0054] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0055] As shown in FIG. 1 to FIG. 10 , an embodiment of a first aspect of the present disclosure discloses a photovoltaic assembly cleaning device, including a gas pipeline assembly 100 , a rotating shaft 200 , a nozzle 300 and a central controller.

[0056] Among them, the gas pipeline assembly 100 can be connected to the gas source; the rotating shaft 200 includes a rotating shaft body and a rotating driving member for driving the rotating shaft 200 to rotate, the rotating shaft body is rotatably connected to the gas pipeline assembly 100, and the rotating shaft body is provided with a gas flow channel that can be connected to the gas pipeline assembly 100; the nozzle 300 is arranged on the rotating shaft body, and the nozzle 300 is connected to the gas flow channel, and the injection direction of the nozzle 300 is parallel to the plane where the photovoltaic assembly 500 is located; the central controller is connected to the rotating driving member signal.

[0057] When using the photovoltaic module cleaning device provided by the embodiment of the present disclosure, since the rotating shaft body is provided with a gas flow channel that can be connected to the gas pipeline assembly 100, the nozzle 300 is provided on the rotating shaft body, and the nozzle 300 is connected to the gas flow channel, and the spray direction of the nozzle 300 is parallel to the plane where the photovoltaic module 500 is located, therefore, when the gas pipeline assembly 100 is connected to the gas source, the gas source can flow through the gas pipeline assembly 100, the gas flow channel of the rotating shaft body and the nozzle 300 in sequence, and finally eject the airflow 302 through the nozzle 300, and impact the photovoltaic module through the high-speed airflow 500, thereby cleaning the covering 501; since the rotating shaft body is rotatably connected to the gas pipeline assembly 100, the nozzle 300 is arranged on the rotating shaft body, and the central controller is connected to the rotating drive member signal. Therefore, the central controller can control the rotating drive member to drive the rotating shaft body to rotate, thereby driving the nozzle 300 to rotate accordingly. Based on the rotation of the nozzle 300, the area swept by the airflow ejected by the nozzle 300 covers the entire surface of the photovoltaic assembly 500, and all the covering 501 on the surface of the photovoltaic assembly 500 are removed.

[0058] It can be seen that the photovoltaic module cleaning device provided in the embodiment of the present disclosure can remove the covering 501 on the photovoltaic module 500, reduce the obstruction of the photovoltaic module 500, and increase the power generation of the photovoltaic module 500; at the same time, the load-bearing weight of the photovoltaic bracket is reduced, which extends the service life of the photovoltaic bracket, thereby extending the service life of the entire photovoltaic module 500.

[0059] It should be noted that the above-mentioned gas source can be directly delivered to the photovoltaic module cleaning device through a pipeline, or the gas source can be directly delivered to the photovoltaic module cleaning device through an air pump. As long as the setting method can meet the use requirements, it falls within the protection scope of the present disclosure; in addition, the above-mentioned gas source can be air or exhaust gas discharged from a factory or other types of gas, as long as it can meet the use requirements; in the embodiment of the present disclosure, the photovoltaic module cleaning device also includes an air pump, which is arranged in a power station or near a photovoltaic field area to deliver the gas source to the gas pipeline assembly 100 through the air pump, so that There is sufficient air pressure in the nozzle 300, and the airflow ejected by the nozzle 300 can knock down the covering 501; and, if the covering 501 is a covering 501 such as snow, ice or frost, since the jet airflow 302 ejected by the nozzle 300 is heated to a certain extent in the air pump, the temperature of the airflow ejected by the nozzle 300 is higher than 0°C. Therefore, the jet airflow 302 will have a certain melting effect on the covering 501 when impacting the covering 501 such as snow, ice or frost, so that the airflow can effectively blow off the covering 501.

[0060] In addition, the airflow path sprayed by the nozzle 300 can be adjusted according to the tilt angle of the photovoltaic module 500, as long as the airflow path sprayed by the nozzle 300 is consistent with the plane of the photovoltaic module 500.

[0061] The central controller can calculate the rotation angle range of the nozzle 300 according to the size of the cover 501. As shown in FIG6 , the silicon cells in the photovoltaic module 500 are arranged in a matrix form. The cover 501 blocks a small area above a complete cell. The coordinates of the area occupied by the cover 501 are (4, 8), so

[0062] Among them, θ1 is the first limit angle of rotation of the nozzle 300, and θ2 is the second limit angle of rotation of the nozzle 300. The angle of rotation of the nozzle 300 is relative to the long side direction of the matrix, that is, the angle relative to the vertical direction in Figure 7. From the above calculation, it can be seen that in the embodiment shown in Figure 6, the nozzle 300 rotates back and forth for a period of time in the range of 20.56° to 29.74°, and at the same time, sprays high-speed pulse airflow to impact the cover 501. The airflow impact can be stopped after the set time or when the light intensity sensor described below detects that there is no obstruction by the cover 501.

[0063] As shown in FIG7 , when the cover 501 blocks a large area and occupies the surface of multiple solar cells, it is necessary to calculate the angle between the two diagonal corners of the blocked area. In the embodiment of the present disclosure, the coordinates of the lower left corner and the upper right corner of the blocked area are (4, 10) and (6, 8) respectively, so we have

[0064] Among them, θ1 is the first limit angle of rotation of the nozzle 300, and θ2 is the second limit angle of rotation of the nozzle 300. The angle of rotation of the nozzle 300 is relative to the long side direction of the matrix, that is, the angle relative to the vertical direction in Figure 8. From the above calculation, it can be seen that in the embodiment shown in Figure 7, the nozzle 300 rotates back and forth for a period of time in the range of 16.70° to 40.60°, and at the same time, sprays high-speed pulse airflow to impact the cover 501. The airflow impact can be stopped after the set time or when the light intensity sensor described below detects that there is no obstruction by the cover 501.

[0065] As shown in FIG8 , in another specific embodiment of the present disclosure, the covering 501 occupies two areas. The two areas are independent of each other and not connected. Therefore, snow removal is required for the two areas separately. The coordinates of the lower left corner and the upper right corner of the first snow area are (4, 10) and (5, 9) respectively. Therefore,

[0066] The coordinates of the lower left corner and upper right corner of the second snow area are (8, 6) and (9, 5) respectively, so we have

[0067] Among them, θ1 is the first limit angle of rotation of the nozzle 300, θ2 is the second limit angle of rotation of the nozzle 300, θ3 is the first limit angle of rotation of the nozzle 300, and θ4 is the second limit angle of rotation of the nozzle 300. The angle of rotation of the nozzle 300 is relative to the long side direction of the matrix, that is, the angle relative to the vertical direction in Figure 8. From the above calculation, it can be seen that the nozzle 300 rotates back and forth for a period of time in the range of 16.70° to 32.01°, and at the same time, it sprays high-speed pulse airflow to impact the cover 501. After the set time, it adjusts the angle to align with the second area; then it rotates back and forth for a period of time in the range of 49.40° to 66.04°, and at the same time, it sprays high-speed pulse airflow to impact the cover 501. The airflow impact can be stopped after the set time or when the light intensity sensor described below detects that there is no obstruction by the cover 501.

[0068] It should be understood that the covering 501 involved in the embodiment of the present disclosure can be a covering 501 of types such as snow, dust, frost, water or fallen leaves. Therefore, the present disclosure does not specifically limit the application scenario of the photovoltaic module cleaning device.

[0069] In addition, when the photovoltaic modules 500 include multiple groups, the opening order of the nozzles 300 is related to the installation order of the nozzles 300 relative to the photovoltaic modules 500. It is necessary to ensure that the covering 501 blown off by the next group of photovoltaic modules 500 by the next nozzle 300 will not accumulate on the surface of the previous group of photovoltaic modules 500; for example, in Figure 9, four groups of photovoltaic modules 500 are arranged from left to right, numbered Ⅰ, Ⅱ, Ⅲ and Ⅳ respectively. The nozzle 300 corresponding to each photovoltaic module 500 is at the upper left of the center line of the photovoltaic module 500. When cleaning, the nozzle 300 numbered Ⅰ is started first, and the nozzle 300 generates a high-speed pulse of a certain intensity, temperature and frequency. The airflow is applied to the surface of the photovoltaic module 500 and impacts the covering 501, blowing off the covering 501 on the surface of the photovoltaic module 500 in that direction; the rotating shaft 200 rotates a certain angle, and the high-speed pulse airflow changes direction, blowing off the covering 501 on the surface of the photovoltaic module 500 in that direction, and repeats the above steps until the airflow sweeps through all the blocked areas on the surface of the photovoltaic module 500 numbered I; then the central controller controls the nozzles 300 corresponding to the photovoltaic modules 500 numbered II, III and IV in turn to clean the photovoltaic modules 500 numbered II, III and IV, until the coverings 501 on all photovoltaic modules 500 are removed.

[0070] In some embodiments, the photovoltaic module cleaning device also includes a light intensity sensor, which is arranged on the photovoltaic module 500, and the light sensor transmits signals to the central controller, so that the light information of the photovoltaic module 500 is collected through the light intensity sensor, and the light information is converted into an electrical signal and transmitted to the central controller. The central controller determines whether each photovoltaic module 500 is blocked by the cover 501 based on the received electrical signal, generates a cleaning list, and controls the rotating drive member to adjust the rotation angle of the rotating shaft body according to the first cleaning task in the cleaning list, so that the minimum area swept by the nozzle 300 arranged on the rotating shaft body can completely cover the area blocked by the cover 501, and the air flow 302 is ejected through the nozzle 300, and the cover 501 is removed by the impact of the air flow, thereby improving the accuracy of cleaning the cover 501 and saving energy consumption.

[0071] It should be understood that when the first cleaning task in the above cleaning list is completed, the central controller will automatically update the cleaning list, move the subsequent cleaning tasks forward, and determine whether the cleaning tasks are empty. If not, continue to clean according to the first cleaning task in the cleaning list. If it is empty, end the cleaning task.

[0072] In addition, the above-mentioned photovoltaic component cleaning device also includes an electric valve 400, which is arranged between the nozzle 300 and the gas pipeline component 100, and the electric valve 400 transmits signals to the central controller so that the central controller can open the electric valve 400 in a targeted manner according to the cleaning tasks in the cleaning list, and only spray air flow to the photovoltaic component 500 blocked by the cover 501, thereby further saving energy consumption.

[0073] As shown in FIG3 , the gas pipeline assembly 100 includes a first gas pipeline 101 and a second gas pipeline 102; wherein, the first gas pipeline 101 is arranged below the photovoltaic assembly 500 and runs through the entire photovoltaic array; the number of the second gas pipeline 102 is multiple, each second gas pipeline 102 is arranged perpendicular to the first gas pipeline 101, the nozzle 300 is arranged on the second gas pipeline 102, and the electric valve 400 is arranged on the second gas pipeline 102 to transport the gas source through the first gas pipeline 101, near each photovoltaic array A second gas pipeline 102 is set perpendicular to the first gas pipeline 101, and the air flow is diverted to the nozzles 300 above each photovoltaic module 500 through the second gas pipeline 102. The second gas pipeline 102 and the nozzle 300 are controlled to be on and off by the electric valve 400. When it is necessary to spray the air flow 302 to clean the covering 501, the central controller controls the electric valve 400 to open. After the gas source in the first gas pipeline 101 is diverted to the second gas pipeline 102, the air flow 302 is sprayed through the nozzle 300 to clear the covering 501.

[0074] The nozzle 300 provided in the embodiment of the present disclosure is arranged on the rotating shaft body through the nozzle fixing member 301, and the nozzle fixing member 301 is provided with a nozzle flow channel connecting the nozzle 300 and the rotating shaft body; wherein, the nozzle fixing member 301 and the nozzle 300 both transmit signals with the central controller, so that the central controller controls the nozzle flow channel and the airflow intensity, airflow frequency, airflow temperature and airflow type in the nozzle 300 according to the coverage area of ​​the cover 501. For example, when the coverage area is large, the parameters such as the airflow intensity, airflow frequency and airflow temperature are increased to facilitate the efficient removal of the cover 501. When the coverage area is small, the parameters such as the airflow intensity, airflow frequency and airflow temperature are reduced to facilitate energy saving.

[0075] As shown in Figure 2, a rotation scale line 201 is provided on the rotating shaft body, and an angle identification line 3011 that matches the rotation scale line 201 is provided on the nozzle fixing part 301, so that the staff can observe the rotation angle of the nozzle 300 through the relative position of the angle identification line 3011 and the rotation scale line 201, which is convenient for debugging the photovoltaic module cleaning device.

[0076] It should be understood that the jet airflow 302 ejected by the nozzle 300 in the embodiment of the present disclosure can be a steady-pressure airflow or a pulsed airflow, etc. As long as the airflow type can meet the use requirements, it falls within the protection scope of the present disclosure; in the embodiment of the present disclosure, the central controller controls the nozzle 300 to eject a highly pulsed airflow to improve the cleaning efficiency of the cover 501.

[0077] In addition, a second embodiment of the present disclosure discloses a method for cleaning a photovoltaic module, comprising the steps of:

[0078] S1: connecting the gas pipeline assembly 100 to the gas source so that the gas flow ejected by the nozzle 300 impacts and cleans the covering 501; and

[0079] S2: The central controller controls the rotation of the rotating shaft body so that the nozzle 300 rotates while spraying the airflow 302, thereby increasing the airflow spraying area, thereby increasing the cleaning area of ​​the photovoltaic assembly 500 and improving the cleaning effect.

[0080] It can be seen that the photovoltaic module cleaning method provided by the embodiment of the present disclosure can impact the covering 501 on the photovoltaic module 500 through the high-speed jet airflow 302. At the same time, based on the central controller, the rotating drive member is controlled to drive the rotating shaft body to rotate, and the nozzle 300 is driven to rotate accordingly. As the nozzle 300 rotates, the area swept by the jet airflow 302 ejected by the nozzle 300 covers the entire surface of the photovoltaic module 500, and all the coverings 501 on the surface of the photovoltaic module 500 are removed. On the one hand, the reduction in power generation caused by the obstruction of the photovoltaic module 500 by the covering 501 is reduced, and the power generation of the photovoltaic module 500 is increased; on the other hand, the load-bearing weight of the photovoltaic bracket is reduced, the service life of the photovoltaic bracket is extended, and the service life of the entire photovoltaic module 500 is extended.

[0081] In some embodiments, the photovoltaic module cleaning method further includes the following steps before step S1:

[0082] SA1: The light intensity sensor collects light intensity information on the photovoltaic module 500 and converts the light intensity information into an electrical signal and transmits it to the central controller so that the central controller can determine whether the photovoltaic module 500 is blocked;

[0083] SA2: The central controller analyzes the received electrical signal to determine whether the photovoltaic module 500 is blocked. If so, step SA3 is executed. If not, the process ends, so as to clean the covering 501 in a targeted manner, improve cleaning accuracy, and save energy.

[0084] SA3: The central controller locates the position of the photovoltaic component 500 to be cleaned according to the obstruction of the photovoltaic component 500 and generates a cleaning list. Each obstructed photovoltaic component 500 corresponds to a cleaning task in the cleaning list, so that they can be cleaned one by one according to the cleaning list to ensure that all obstructed photovoltaic components 500 can be cleaned.

[0085] It should be noted that the airflow path sprayed by the nozzle 300 can be adjusted according to the tilt angle of the photovoltaic module 500, as long as the airflow path sprayed by the nozzle 300 is consistent with the plane of the photovoltaic module 500.

[0086] In some embodiments, the photovoltaic assembly cleaning method further includes step SA4 after step SA3:

[0087] The central controller controls the opening of the electric valve 400 corresponding to the first cleaning task in the cleaning list so that the air source flows into the nozzle 300 corresponding to the first cleaning task in a targeted manner, and cleans the photovoltaic component 500 corresponding to the first cleaning task, thereby reducing air source loss and saving energy consumption.

[0088] In some embodiments, the photovoltaic assembly cleaning method provided by the embodiments of the present disclosure further includes the following steps after step S2:

[0089] S2A1: Determine whether the first cleaning task in the cleaning list is completed. If yes, execute step S2A2; if not, return to step S1 to complete each cleaning task in the cleaning list one by one.

[0090] S2A2: Update the cleaning list so that after the first cleaning task in the cleaning list is completed, the second cleaning task is updated to the first cleaning task, the third cleaning task is updated to the second cleaning task, and so on, until all cleaning tasks are completed; and

[0091] S2A3: Determine whether the cleaning list is cleared. If so, end the process. If not, return to step SA4 to complete all cleaning tasks.

[0092] It should be understood that the photovoltaic module cleaning method provided in the embodiment of the present disclosure can clean snow, dust, frost, water or fallen leaves and other types of coverings. Therefore, the present disclosure does not specifically limit the application scenarios of the photovoltaic module cleaning method.

[0093] The terms "first," "second," and so on, in the specification and claims of this disclosure and the accompanying drawings are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.

[0094] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present disclosure. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments shown herein, but is intended to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic module cleaning device, comprising: A gas pipeline assembly capable of being connected to a gas source; A rotating shaft, the rotating shaft comprising a rotating shaft body and a rotating driving member for driving the rotating shaft to rotate, the rotating shaft body being rotatably connected to the gas pipeline assembly, and the rotating shaft body being provided with a gas flow channel capable of communicating with the gas pipeline assembly; A nozzle is disposed on the rotating shaft body, the nozzle is in communication with the gas flow channel, and the spraying direction of the nozzle is parallel to the plane where the photovoltaic module is located; The central controller is connected to the rotation drive member by signal.

2. The photovoltaic component cleaning device according to claim 1 further comprises a light intensity sensor, wherein the light intensity sensor is disposed on the photovoltaic component, and the light sensor transmits signals to the central controller.

3. The photovoltaic component cleaning device according to claim 1 or 2 further comprises an electric valve, wherein the electric valve is arranged between the nozzle and the gas pipeline component, and the electric valve transmits signals to the central controller.

4. The photovoltaic assembly cleaning device according to claim 3, wherein the gas pipeline assembly comprises: A first gas pipeline is arranged below the photovoltaic module and runs through the entire photovoltaic array; The second gas pipeline is vertically arranged with respect to the first gas pipeline, the nozzle is arranged on the second gas pipeline, and the electric valve is arranged on the second gas pipeline.

5. The photovoltaic assembly cleaning device according to any one of claims 1 to 4, wherein the nozzle is arranged on the rotating shaft body through a nozzle fixing member, and the nozzle fixing member is provided with a nozzle flow channel connecting the nozzle and the rotating shaft body; in, The nozzle fixing member and the nozzle both transmit signals to the central controller, so that the central controller controls the airflow intensity, airflow frequency, airflow temperature and airflow type in the nozzle flow channel and the nozzle.

6. The photovoltaic module cleaning device according to claim 5, wherein a rotation scale line is provided on the rotating shaft body, and an angle identification line matching the rotation scale line is provided on the nozzle fixing member.

7. The photovoltaic assembly cleaning device according to any one of claims 1 to 6, wherein the photovoltaic assembly cleaning device further comprises an air pump, and the air delivery pipeline assembly is connected to the air pump; And / or, the central controller controls the nozzle to spray pulsed airflow.

8. A method for cleaning a photovoltaic module, comprising the steps of: S1: connecting the gas pipeline assembly to the gas source so that the gas flow ejected from the nozzle can impact and clean the covering; S2: The central controller controls the rotation of the rotating shaft body so that the nozzle rotates while spraying the airflow, thereby increasing the airflow spraying area.

9. The photovoltaic assembly cleaning method according to claim 8, further comprising a step before step S1: SA1: Collecting light intensity information on the photovoltaic module through a light intensity sensor, and converting the light intensity information into an electrical signal and transmitting it to a central controller; SA2: The central controller analyzes the received electrical signal to determine whether the photovoltaic module is blocked, and if so, executes step SA3, otherwise, ends; SA3: The central controller locates the positions of the photovoltaic components to be cleaned according to the shielding conditions of the photovoltaic components and generates a cleaning list, and each shielded photovoltaic component corresponds to a cleaning task in the cleaning list.

10. The photovoltaic assembly cleaning method according to claim 9, further comprising step SA4 after step SA3: The central controller controls the electric valve corresponding to the first cleaning task in the cleaning list to open, so as to clean the photovoltaic component corresponding to the first cleaning task.

11. The photovoltaic assembly cleaning method according to claim 10, further comprising a step after step S2: S2A1: Determine whether the first cleaning task in the cleaning list is completed, if yes, execute step S2A2, if no, return to execute step S1; S2A2: Update the sweep list; S2A3: Determine whether the cleaning list is cleared, if so, end, if not, return to execute step SA4.

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