Photovoltaic module frame cleaning device and photovoltaic module frame cleaning method

Abstract

The invention relates to the field of photovoltaic technology, in particular to a photovoltaic module frame cleaning device and a photovoltaic module frame cleaning method, and the photovoltaic module frame cleaning device comprises a cleaning unit, a detection unit and a controller. The cleaning unit comprises an abutting piece and cleaning cloth, and the abutting piece can abut the cleaning cloth against the to-be-cleaned area of the frame so as to erase or wipe dirt to be cleaned. The detection unit can detect the proportion a of dirt to be cleaned in the area to be cleaned. The controller is in communication connection with the cleaning unit and the detection unit, and the controller can control the cleaning unit according to the detection result of the detection unit, so that the final proportion of the dirt to be cleaned is lower than a preset qualified value a0. The photovoltaic module frame cleaning method is applied to the photovoltaic module frame cleaning device and comprises the steps that the detection unit detects the proportion a, when a is larger than or equal to a preset value a1, the erasure mode is started, and when a is smaller than a1 and larger than or equal to a preset qualified value a0, the erasure mode is started. And one-time repeated detection of the cleaning detection unit is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, in particular to a photovoltaic module frame cleaning device and a photovoltaic module frame cleaning method. BACKGROUND

[0002] The manufacturing process of a photovoltaic module includes multiple process steps, wherein the frame assembly process requires uniform application of silicone in the aluminum alloy frame groove, and the frame is then pressed to the edge of the module, resulting in overflow of silicone on both sides of the corner position of the frame. To address the problem of overflow of silicone at the corners of the photovoltaic module frame, the conventional cleaning method is manual wiping of the frame overflowed with silicone to ensure the cleanliness of the module. Manual cleaning of residual glue not only has low cleaning efficiency, but also has the possibility of neglecting a certain side, which is not conducive to ensuring the appearance cleanliness of the product. SUMMARY

[0003] An object of the present application is to provide a photovoltaic module frame cleaning device that can improve cleaning efficiency and help ensure that the cleaning degree meets the requirements.

[0004] To achieve this object, the present application adopts the following technical solutions:

[0005] A photovoltaic module frame cleaning device is provided, comprising:

[0006] A cleaning unit, the cleaning unit comprising a pressing member and a cleaning cloth, the pressing member being capable of pressing the cleaning cloth against a to-be-cleaned area of the frame to shovel or wipe off to-be-cleaned dirt;

[0007] A detection unit capable of detecting the proportion a of the to-be-cleaned dirt in the to-be-cleaned area;

[0008] A controller in communication connection with the cleaning unit and the detection unit, the controller being capable of controlling the cleaning unit according to the detection result of the detection unit, so that the final proportion of the to-be-cleaned dirt is lower than a preset qualified value a0.

[0009] Optionally, the detection unit in cooperation with the controller is capable of measuring the length L1 of the projection of the to-be-cleaned dirt in a direction perpendicular to the panel surface of the photovoltaic module, and calculating the ratio Q of L1 and L2, L2 being the length of the projection of the to-be-cleaned area in the direction perpendicular to the panel surface of the photovoltaic module, the ratio Q being the proportion a of the to-be-cleaned dirt in the to-be-cleaned area;

[0010] And / or, the preset qualified value a0 satisfies: 3%≤a0≤5%.

[0011] Optionally, the cleaning unit comprises a guide assembly capable of supporting the cleaning cloth and capable of pulling the cleaning cloth in the extension direction of the cleaning cloth.

[0012] Optionally, the guiding assembly comprises a fixed guiding wheel and a pulling guiding wheel, the fixed guiding wheel and the pulling guiding wheel jointly support the cleaning cloth, the pressing piece is located on the side of the cleaning cloth away from the frame between the fixed guiding wheel and the pulling guiding wheel, and the pulling guiding wheel is movable relative to the fixed guiding wheel so that the pulling guiding wheel can pull the cleaning cloth in the extending direction of the cleaning cloth.

[0013] Optionally, the fixed guiding wheel is provided with two, the cleaning cloth is wound on one of the fixed guiding wheels, the pulling guiding wheel and the other fixed guiding wheel in sequence, so that the cleaning cloth forms a V-shaped structure, and the area to be cleaned is located at the corner of the frame at the groove of the V-shaped structure.

[0014] Optionally, the two side faces of the corner each have the area to be cleaned, the pressing piece is provided with two, the two pressing pieces can press the two areas to be cleaned respectively, one of the pressing pieces is located between one of the fixed guiding wheels and the pulling guiding wheel, and the other pressing piece is located between the other fixed guiding wheel and the pulling guiding wheel.

[0015] Optionally, the cleaning unit further comprises a releasing wheel and a winding wheel, one end of the cleaning cloth is wound on the releasing wheel, and the other end of the cleaning cloth is wound on the winding wheel, the releasing wheel is used for releasing the unused cleaning cloth, and the winding wheel is used for winding the used cleaning cloth.

[0016] Optionally, the cleaning unit comprises a pressing driving piece, the pressing piece is connected to the output end of the pressing driving piece, and the pressing driving piece can drive the pressing piece to move to press or leave the area to be cleaned.

[0017] Optionally, the cleaning unit further comprises a support plate and a support driving piece, the cleaning unit and the detection unit are arranged on the support plate, the support plate is connected to the output end of the support driving piece, and the support driving piece is used for driving the support plate to be close to or away from the frame.

[0018] Another object of the present application is to provide a photovoltaic module frame cleaning method, which can improve the cleaning efficiency and help to ensure that the cleaning degree meets the requirements.

[0019] To achieve the above object, the present application adopts the following technical solutions.

[0020] The present application provides a photovoltaic module frame cleaning method applied to the photovoltaic module frame cleaning device, and the photovoltaic module frame cleaning method comprises the following steps.

[0021] The detection unit detects the proportion 'a' of the dirt to be cleaned in the area to be cleaned. When 'a' is greater than or equal to a preset value 'a1', the removal mode is activated. When 'a' is less than 'a1' but greater than or equal to the preset qualified value 'a0', the wiping mode is activated.

[0022] After one cleaning cycle is completed, the detection unit repeats the detection. When a is greater than or equal to a0, the above cleaning action is repeated until a is less than a0. Each time the cleaning is repeated, the pressure of the pressing member against the area to be cleaned increases.

[0023] Optionally, both the cleaning unit and the detection unit are mounted on the support plate;

[0024] The removal mode includes the following steps: the controller controls the support plate to move relative to the frame, and the pressing member moves relative to the support plate, so that the pressing member presses the cleaning cloth against the area to be cleaned, and the pressing member moves along the length direction of the area to be cleaned to remove the dirt to be cleaned;

[0025] And / or, the wiping mode includes the following steps: the detection unit detects the specific location of the dirt to be cleaned, the controller controls the pressing member to press against the specific location, and controls the pull-out guide wheel to pull out the cleaning cloth to wipe away the dirt to be cleaned.

[0026] The beneficial effects of this invention are:

[0027] This invention provides a photovoltaic module frame cleaning device, including a cleaning unit, a detection unit, and a controller. The cleaning unit includes a pressing component and a cleaning cloth. The pressing component presses the cleaning cloth against the area of ​​the frame to be cleaned to remove or wipe away dirt. The detection unit detects the percentage (a) of dirt to be cleaned within the cleaning area. The controller is communicatively connected to both the cleaning unit and the detection unit. The controller controls the cleaning unit based on the detection results to ensure that the final percentage of dirt to be cleaned is lower than a preset acceptable value (a0). This photovoltaic module frame cleaning device, by incorporating the pressing component and cleaning cloth in the cleaning unit, can automatically remove or wipe away dirt, thus improving cleaning efficiency. Furthermore, by using the detection unit to monitor the cleanliness of the area to be cleaned, and coordinating with the controller to control the cleaning unit, repeated cleaning can be performed if the detection fails, ensuring that the final cleanliness meets the requirements.

[0028] This invention also provides a method for cleaning the frame of a photovoltaic module, applied to the aforementioned photovoltaic module frame cleaning device. The method includes the following steps: a detection unit detects the proportion 'a' of the dirt to be cleaned in the area to be cleaned. When 'a' is greater than or equal to a preset value a1, a scraping mode is activated; when 'a' is less than a1 but greater than or equal to a preset acceptable value a0, a wiping mode is activated. After one cleaning cycle, the detection unit repeats the detection. When 'a' is greater than or equal to a0, the above cleaning action is repeated until 'a' is less than a0. During each repeated cleaning, the pressure of the pressing member against the area to be cleaned increases. This photovoltaic module frame cleaning method can improve cleaning efficiency and helps ensure that the cleanliness meets requirements. Attached Figure Description

[0029] Figure 1 This is a partial schematic diagram of the photovoltaic module frame cleaning device and the photovoltaic module from a first perspective provided in an embodiment of the present invention;

[0030] Figure 2 This is a partial structural schematic diagram from a second perspective of the photovoltaic module frame cleaning device provided in an embodiment of the present invention;

[0031] Figure 3 This is a third-view structural schematic diagram of the photovoltaic module frame cleaning device provided in an embodiment of the present invention;

[0032] Figure 4 This is a partial schematic diagram from a fourth perspective of the photovoltaic module frame cleaning device and the photovoltaic module provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of one side of the corner of the frame of the photovoltaic module provided in an embodiment of the present invention;

[0034] Figure 6 This is a flowchart illustrating the photovoltaic module frame cleaning method provided in an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Cleaning unit; 101. Pressing component; 102. Cleaning cloth; 103. Fixed guide wheel; 104. Pull-out guide wheel; 105. Unwinding wheel; 106. Rewinding wheel; 107. Pressing drive component; 108. Support plate; 109. Support drive component; 110. First guide rail; 111. Second guide rail; 112. Support frame; 113. Pull-out drive component;

[0037] 2. Detection unit; 21. CCD camera; 22. Bracket;

[0038] 900, Photovoltaic module; 901, Frame; 911, Corner; 9111, Area to be cleaned; 9112, Dirt to be cleaned. Detailed Implementation

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] like Figures 1-4 As shown, the photovoltaic module frame cleaning device of this embodiment includes a cleaning unit 1, a detection unit 2, and a controller (not shown in the figure). The cleaning unit 1 includes a pressing member 101 and a cleaning cloth 102. The pressing member 101 presses the cleaning cloth 102 against the area 9111 of the frame 901 to be cleaned, thereby removing or wiping away dirt 9112. The detection unit 2 can detect the proportion 'a' of dirt 9112 in the area 9111 to be cleaned. The controller is communicatively connected to both the cleaning unit 1 and the detection unit 2. The controller can control the cleaning unit 1 based on the detection results of the detection unit 2, so that the final proportion of dirt 9112 to be cleaned is lower than a preset acceptable value 'a0'. Optionally, in this embodiment, the area 9111 to be cleaned is located at the corner 911 of the frame 901, specifically at the two sides of the corner 911.

[0043] The photovoltaic module frame cleaning device can automatically remove or wipe away the dirt 9112 to be cleaned by setting the pressing part 101 and the cleaning cloth 102 of the cleaning unit 1, thereby improving the cleaning efficiency. Furthermore, by setting the detection unit 2 to detect the cleaning status of the area 9111 to be cleaned, and cooperating with the controller to control the cleaning unit 1, the cleaning can be repeated when the detection is unqualified, so as to ensure that the final cleaning degree meets the requirements.

[0044] In this embodiment, the controller can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program, which then controls the various components of the cleaning unit 1 to cooperate according to the detection results of the detection unit 2, thereby achieving the function of single cleaning or repeated cleaning. Since the controller is a conventional mechanism in the field of mechanical automation, it will not be described in detail here. In this embodiment, the controller adopts the Siemens S7-1200 series or the Mitsubishi FX5U series.

[0045] Optionally, in this embodiment, the pressing member 101 is a pressing roller. The axial direction of the pressing roller is parallel to the width direction of the cleaning cloth 102. When the cleaning cloth 102 is pulled along its own length direction, the pressing roller can roll relative to the cleaning cloth 102, reducing the wear of the pressing member 101 on the cleaning cloth 102 and preventing the cleaning cloth 102 from breaking.

[0046] Optionally, in other embodiments, the pressing member 101 can also be a scraper, with its blade inclined to the surface of the area to be cleaned 9111 and forming an obtuse angle with the surface of the plate in front of it, thus facilitating the removal of the dirt 9112 to be cleaned. To prevent the scraper from cutting the cleaning cloth 102, the cleaning cloth 102 can be controlled to move along its own length to ensure synchronous movement and eliminate relative friction. Furthermore, a high-toughness material can be used for the cleaning cloth 102 to further prevent damage.

[0047] Optionally, the cleaning unit 1 includes a pressure drive 107, and a pressure member 101 is connected to the output end of the pressure drive 107. The pressure drive 107 can drive the pressure member 101 to move so as to press against or move away from the area 9111 to be cleaned.

[0048] Optionally, the direction in which the pressing drive 107 pushes the pressing member 101 to extend is parallel to the surface of the photovoltaic module 900, and is neither perpendicular nor parallel to the side of the corner 911 of the frame 901. That is, the direction in which the pressing drive 107 pushes the pressing member 101 to extend forms an acute angle with the side of the corner 911 of the frame 901. In this embodiment, the pressing member 101 extends towards the tip of the corner 911.

[0049] Optionally, the two ends of the shaft of the pressure roller are connected to the support frame 112, and the support frame 112 is connected to the output end of the pressure drive 107 to ensure that the pressure roller can roll normally.

[0050] Optionally, the cleaning unit 1 also includes a support plate 108 and a support drive 109. The cleaning unit 1 and the detection unit 2 are both disposed on the support plate 108. The support plate 108 is connected to the output end of the support drive 109. The support drive 109 is used to drive the support plate 108 to move closer to or away from the frame 901.

[0051] Optionally, the cleaning unit 1 further includes a second guide rail 111, which is disposed on the working platform. A second slider is disposed below the support plate 108, and the second slider is slidably disposed on the second guide rail 111, which can ensure the accurate movement direction of the support plate 108 and improve the movement stability. Optionally, two second guide rails 111 and two second sliders are provided to further improve the movement stability of the support plate 108.

[0052] Optionally, in this embodiment, the direction in which the support drive member 109 drives the support plate 108 to move is parallel to the surface of the photovoltaic module 900 and is on the same straight line as the angle bisector of the corner 911, that is, the extension direction of the second guide rail 111 is on the same straight line as the angle bisector of the corner 911.

[0053] It is understood that the movement trajectory of the pressing member 101 relative to the photovoltaic module 900 is related to both the pressing drive member 107 and the support drive member 109. Since the movement direction of the output end of the pressing drive member 107 is not parallel to the movement direction of the output end of the support drive member 109, their cooperation allows the pressing member 101 to move along any trajectory. The distance between the pressing member 101 and the side of the corner 911, the contact angle between them, and the pressing force between them can be arbitrarily adjusted. When the movement direction of the pressing member 101 forms an obtuse angle with its front side, a scraping action is achieved. When the pressing force of the pressing member 101 is large and it moves along the length of the side, a wiping action is achieved. Through the cooperation of the pressing drive member 107 and the support drive member 109, the efficiency of the pressing member 101 pressing against the cleaning cloth 102 to remove the dirt 9112 can be improved, and stubborn dirt can be removed.

[0054] To prevent secondary contamination, the cleaning unit 1 may optionally include an unwinding wheel 105 and a winding wheel 106. One end of the cleaning cloth 102 is wound around the unwinding wheel 105, and the other end is wound around the winding wheel 106. The unwinding wheel 105 is used to release unused cleaning cloth 102, and the winding wheel 106 is used to wind up used cleaning cloth 102. Both the unwinding wheel 105 and the winding wheel 106 are mounted on the support plate 108 to move synchronously with the pressing member 101, etc.

[0055] Optionally, the cleaning unit 1 includes a guide component that supports the cleaning cloth 102 and allows the cleaning cloth 102 to be pulled along its extension direction. It is understood that pulling the cleaning cloth 102 a large distance away can move the used cleaning cloth 102 away and a new cleaning cloth 102 to the cleaning area, thus preventing the dirt 9112 hanging on the cleaning cloth 102 from sticking back into the area 9111 to be cleaned, causing secondary contamination. Pulling the cleaning cloth 102 a small distance away, combined with the pressure of the pressing member 101, allows the cleaning cloth 102 to wipe specific areas, precisely removing the dirt 9112 and improving cleaning efficiency.

[0056] Optionally, the guide assembly includes a fixed guide wheel 103 and a pull-out guide wheel 104. The fixed guide wheel 103 and the pull-out guide wheel 104 jointly support the cleaning cloth 102. The pressing member 101 is located between the fixed guide wheel 103 and the pull-out guide wheel 104 on the side of the cleaning cloth 102 facing away from the frame 901. The pull-out guide wheel 104 can move relative to the fixed guide wheel 103 so that the pull-out guide wheel 104 can pull the cleaning cloth 102 along the extension direction of the cleaning cloth 102.

[0057] like Figure 4 As shown, optionally, two fixed guide wheels 103 are provided. The cleaning cloth 102 is sequentially wound around one fixed guide wheel 103, the pull-out guide wheel 104, and the other fixed guide wheel 103 to form a V-shaped structure, with the corner 911 located at the groove of the V-shaped structure. The unwinding wheel 105 and the winding wheel 106 are located at the two ends, forming a W-shaped structure. That is, the cleaning cloth 102 is wound from the unwinding wheel 105 through one fixed guide wheel 103, the pull-out guide wheel 104, and the other fixed guide wheel 103, and finally wound around the winding wheel 106.

[0058] Optionally, the width direction of the cleaning cloth 102 is parallel to the thickness direction of the frame 901, and the axes of rotation of the two fixed guide wheels 103, the pull guide wheel 104, the unwinding wheel 105 and the winding wheel 106 are all parallel to the width direction of the cleaning cloth 102.

[0059] Optionally, the guide assembly also includes a pull-out drive 113, which is also disposed on the support plate 108. The connecting plate at one end of the shaft of the pull-out guide wheel 104 is connected to the output end of the pull-out drive 113, and the pull-out drive 113 drives the pull-out guide wheel 104 to move relative to the fixed guide wheel 103.

[0060] Optionally, in this embodiment, the extension and retraction direction of the output end of the pull-out drive 113 is on the same straight line as the angle bisector of the corner 911. When the pull-out drive 113 drives the pull-out guide wheel 104 away from the corner 911, the cleaning cloth 102 will be pulled out so that the cleaning cloth 102 at both pressing members 101 can perform the pull-out wiping action.

[0061] Optionally, the guide assembly also includes a first guide rail 110, which is disposed on the support plate 108. A first slider is disposed below the connecting plate at one end of the shaft of the pull guide wheel 104. The first slider slides in cooperation with the first guide rail 110, which can limit the movement direction of the pull guide wheel 104 and ensure the stability of the pull guide wheel when it moves relative to the fixed guide wheel 103.

[0062] Optionally, both sides of the corner 911 have areas 9111 to be cleaned, and two pressing members 101 are provided. The two pressing members 101 can press against the two areas 9111 to be cleaned respectively. One pressing member 101 is located between a fixed guide wheel 103 and a pull-out guide wheel 104, and the other pressing member 101 is located between another fixed guide wheel 103 and a pull-out guide wheel 104. The two pressing members 101 can achieve simultaneous cleaning of both sides, and the extension amount and pressing force of the two pressing members 101 can be adjusted according to the different proportions and positions of dirt on the two sides.

[0063] When the pull guide wheel 104 moves away from the corner 911, the cleaning cloths 102 on both sides of the pull guide wheel 104 will be subjected to a pulling force. Since the two pressing members 101 can press the cleaning cloths 102 on both sides against the area to be cleaned 9111 respectively, the sliding friction between the cleaning cloths 102 and the surface of the area to be cleaned 9111 can wipe away the dirt 9112. Of course, the actions of the two pressing drive members 107 can also be controlled to be inconsistent to achieve the wiping action on one side.

[0064] Optionally, the two pressing members 101 are symmetrically arranged along the angle bisector of the corner 911, and the two pressing rollers are respectively disposed on the two support frames 112. The two support frames 112 are respectively connected to the output ends of the two pressing drive members 107. Optionally, in this embodiment, both sets of pressing members 101 and pressing drive members 107 are disposed on the same support plate 108 and move synchronously with the drive of the support drive member 109.

[0065] Optionally, in this embodiment, the detection unit 2 includes a camera, which is used to take pictures of the area 9111 to be cleaned. The proportion 'a' of the dirt 9112 to be cleaned can be determined by calculating the photos. The detection unit 2, in conjunction with the controller, controls the action of the cleaning unit 1 to ensure that the proportion of the dirt 9112 to be cleaned meets the requirements.

[0066] Optionally, in this embodiment, the camera is a CCD camera 21, which can improve the shooting accuracy. Optionally, the detection unit 2 also includes a bracket 22, which is used to support the CCD camera 21. The bracket 22 is located on the support plate 108 so that the detection unit 2 can move closer to or further away from the area 9111 to be cleaned at the corner 911 along with the cleaning unit 1.

[0067] Optionally, in this embodiment, the height of the bracket 22 is higher than the height of the pull-out guide wheel 104 along the direction perpendicular to the surface of the photovoltaic module 900. The surface of the photovoltaic module 900 is horizontally arranged, and the lens of the CCD camera 21 is tilted to capture images from a high position towards the side of the corner 911. Optionally, the shooting direction of the CCD camera 21 can be directly opposite the side of the corner 911, so that two sides can be captured simultaneously using one CCD camera 21, saving costs.

[0068] Optionally, in this embodiment, one area 9111 to be cleaned is located on one side of corner 911, and another area 9111 to be cleaned is located on the other side of corner 911. The extension direction of the area 9111 to be cleaned is consistent with the length direction of the side frame 901. The length of one area 9111 to be cleaned ranges from 5cm to 10cm, and one end of the area 9111 to be cleaned is the side of corner 911. Similarly, the other area 9111 to be cleaned is located on the other side of corner 911 and is symmetrically arranged with the aforementioned area 9111 to be cleaned along the angle bisector of corner 911. It is known that the length L2 of the projection of the area 9111 to be cleaned along the direction perpendicular to the surface of photovoltaic module 900 is a preset known value.

[0069] like Figure 5 As shown, optionally, the detection unit 2, in conjunction with the controller, can measure the length L1 of the projected dirt 9112 to be cleaned along the direction perpendicular to the surface of the photovoltaic module 900, and calculate the ratio Q of L1 to L2. The ratio Q is the proportion a of the dirt 9112 to be cleaned within the area 9111 to be cleaned. That is, the proportion of the dirt 9112 to be cleaned within the area 9111 to be cleaned is not an area ratio, but a projection length ratio. It should be noted that since the CCD camera 21 is not perpendicular to one side of the frame 901 when taking pictures, but at a certain tilt angle, the CCD camera 21 takes a picture each time the support drive 109 drives the support plate 108 to a fixed position, thus fixing the tilt angle and measuring only once. Based on the information in the captured image, the distance between the fixed position and the corner 911, and the aforementioned fixed tilt angle, the length L1 of the projected dirt 9112 to be cleaned along the direction perpendicular to the surface of the photovoltaic module 900 can be calculated. Furthermore, since the length L2 of the projection of the area 9111 to be cleaned along the direction perpendicular to the surface of the photovoltaic module 900 is a preset known value, the ratio Q of L1 to L2 can be calculated.

[0070] Optionally, the preset acceptable value a0 satisfies: 3% ≤ a0 ≤ 5%. If the preset acceptable value a0 is less than 3%, then for some stubborn dirt 9112, repeated cleaning and increased pressure from the pressing component 101 are required. However, if the pressing force of the pressing component 101 is too high, it may damage the frame 901 or even the photovoltaic panel at this location, and excessive cleaning is not conducive to improving overall manufacturing efficiency. Therefore, the preset acceptable value a0 cannot be less than 3%. However, if the preset acceptable value a0 is greater than 5%, there will be too much residue, which is not conducive to ensuring a clean appearance.

[0071] It should also be noted that Figure 5 The black line on the cleaning area 9111 of the PV module 900 can refer to the recessed reinforcing rib or the slot reserved for installation. Of course, other PV module models do not have recesses or slots.

[0072] like Figure 6 As shown, this embodiment also provides a photovoltaic module frame cleaning method, which is applied to the photovoltaic module frame cleaning device described above, to improve cleaning efficiency and ensure that the cleaning degree meets the requirements.

[0073] The method for cleaning the frame of photovoltaic modules includes the following steps:

[0074] First, the detection unit 2 detects the proportion 'a' of the dirt 9112 to be cleaned in the area 9111 to be cleaned. When 'a' is greater than or equal to the preset value 'a1', the scraping mode is activated; when 'a' is less than 'a1' but greater than or equal to the preset acceptable value 'a0', the wiping mode is activated. That is, when the projected coverage length of the dirt 9112 to be cleaned is long, the scraping mode efficiently removes most of the dirt 9112, improving cleaning efficiency. When the projected coverage length of the dirt 9112 to be cleaned is short, it can be considered that the dirt 9112 to be cleaned is relatively concentrated, and the wiping mode can be activated to wipe it at the specific location, improving efficiency while preventing the dirt from being wiped to other areas.

[0075] Optionally, when the proportion a of the areas 9111 to be cleaned on the two sides of a corner 911 is greater than or equal to a preset value a1, and the other a satisfies a0≤a<a1, the overall shaving mode is activated, and the shaving action is activated on both sides at the same time to ensure that the dirt 9112 to be cleaned is removed over a large area.

[0076] Optionally, the removal mode includes the following steps: the controller controls the support plate 108 to move relative to the frame 901, and the pressing member 101 to move relative to the support plate 108, so that the pressing member 101 presses the cleaning cloth 102 against the area to be cleaned 9111, and the pressing member 101 moves along the length direction of the area to be cleaned 9111 to remove the dirt 9112 to be cleaned. That is, the controller controls the support drive member 109 and the pressing drive member 107 to work together so that the pressing member 101 presses the cleaning cloth 102 against the area to be cleaned 9111 with appropriate pressing pressure. Optionally, in this embodiment, the pressing member 101 moves along the length direction of the area to be cleaned 9111, and starts from one end of the area to be cleaned 9111 away from the side of the corner 911, and moves towards the side of the corner 911, that is, from... Figure 5 The right end of it moves toward the left.

[0077] Optionally, the wiping mode includes the following steps: the detection unit 2 detects the specific location of the dirt 9112 to be cleaned, the controller controls the pressing member 101 to press against the specific location, and controls the pull guide wheel 104 to pull out the cleaning cloth 102. The cleaning cloth 102 generates sliding friction relative to the surface of the area to be cleaned 9111, so as to wipe away the dirt 9112 to be cleaned.

[0078] Optionally, when the specific locations of multiple dirt particles 9112 to be cleaned are not within a projected length area, that is, when multiple dirt particles 9112 to be cleaned are arranged at intervals along the length direction of the side, multiple wiping actions can be performed to wipe away the multiple dirt particles 9112 to be cleaned separately. First, wipe away the dirt particles 9112 to be cleaned on the side away from the corner 911, and then wipe them one by one towards the side of the corner 911, until a wiping action is performed on all multiple dirt particles 9112 to be cleaned, and then a second inspection can be performed.

[0079] Optionally, when the proportion 'a' of the areas 9111 to be cleaned on both sides of a corner 911 is less than a1 and greater than or equal to the preset qualified value a0, but the specific positions of the dirt 9112 to be cleaned on both sides are asymmetrical, the wiping action on one side is completed first, and then the wiping action on the other side is performed. When wiping one side, the pressing member 101 on the other side is in a retracted state.

[0080] Optionally, after one cleaning is completed, the detection unit 2 repeats the detection. When a is greater than or equal to a0, the above cleaning action is repeated until a is less than a0. Each time the cleaning is repeated, the pressure of the pressing member 101 against the area 9111 to be cleaned increases.

[0081] Optionally, after both sides have been cleaned once, a second inspection is performed. Before the second inspection, the controller needs to control the support drive 109 to move the support plate 108 so that the support plate 108 is in a fixed position so that the length L1 of the actual projected dirt 9112 to be cleaned can be calculated, thereby calculating the ratio Q, i.e., the proportion a.

[0082] Optionally, each time the cleaning is repeated, the pressure of the pressure member 101 against the area 9111 to be cleaned increases, and the preset amplitude can be increased each time until the preset maximum value of the pressure is reached.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic module frame cleaning device, characterized in that, include: The cleaning unit (1) includes a pressing member (101) and a cleaning cloth (102). The pressing member (101) can press the cleaning cloth (102) against the area to be cleaned (9111) of the frame (901) to remove or wipe away the dirt (9112) to be cleaned. The detection unit (2) is capable of detecting the proportion a of the dirt (9112) to be cleaned in the area to be cleaned (9111); The controller is communicatively connected to both the cleaning unit (1) and the detection unit (2). The controller can control the cleaning unit (1) according to the detection result of the detection unit (2) so that the final proportion of the dirt (9112) to be cleaned is lower than the preset qualified value a0.

2. The photovoltaic module frame cleaning device according to claim 1, characterized in that, The detection unit (2), in conjunction with the controller, can measure the length L1 of the projection of the dirt (9112) to be cleaned along the direction perpendicular to the surface of the photovoltaic module (900), and calculate the ratio Q of L1 to L2, where L2 is the length of the projection of the area (9111) to be cleaned along the direction perpendicular to the surface of the photovoltaic module (900), and the ratio Q is the proportion a of the dirt (9112) to be cleaned in the area (9111) to be cleaned. And / or, the preset qualified value a0 satisfies: 3%≤a0≤5%.

3. The photovoltaic module frame cleaning device according to claim 1, characterized in that, The cleaning unit (1) includes a guide component that can support the cleaning cloth (102) and pull the cleaning cloth (102) along the extension direction of the cleaning cloth (102).

4. The photovoltaic module frame cleaning device according to claim 3, characterized in that, The guide assembly includes a fixed guide wheel (103) and a pull-out guide wheel (104), which together support the cleaning cloth (102). The pressing member (101) is located between the fixed guide wheel (103) and the pull-out guide wheel (104) on the side of the cleaning cloth (102) away from the frame (901). The pull-out guide wheel (104) is movable relative to the fixed guide wheel (103) so that the pull-out guide wheel (104) can pull the cleaning cloth (102) along the extension direction of the cleaning cloth (102).

5. The photovoltaic module frame cleaning device according to claim 4, characterized in that, Two fixed guide wheels (103) are provided. The cleaning cloth (102) is wrapped around one of the fixed guide wheels (103), the pull-out guide wheel (104) and the other fixed guide wheel (103) in sequence, so that the cleaning cloth (102) forms a V-shaped structure. The area to be cleaned (9111) is located at the corner (911) of the frame (901), and the corner (911) is located at the groove of the V-shaped structure.

6. The photovoltaic module frame cleaning device according to claim 5, characterized in that, Both sides of the corner (911) have the area to be cleaned (9111). Two pressing members (101) are provided. The two pressing members (101) can press against the two areas to be cleaned (9111) respectively. One pressing member (101) is located between one fixed guide wheel (103) and the pull guide wheel (104), and the other pressing member (101) is located between the other fixed guide wheel (103) and the pull guide wheel (104).

7. The photovoltaic module frame cleaning device according to any one of claims 1-6, characterized in that, The cleaning unit (1) further includes an unwinding reel (105) and a winding reel (106). One end of the cleaning cloth (102) is wound around the unwinding reel (105), and the other end is wound around the winding reel (106). The unwinding reel (105) is used to release the unused cleaning cloth (102), and the winding reel (106) is used to wind the used cleaning cloth (102).

8. The photovoltaic module frame cleaning device according to any one of claims 1-6, characterized in that, The cleaning unit (1) includes a pressure drive (107), the pressure member (101) is connected to the output end of the pressure drive (107), and the pressure drive (107) can drive the pressure member (101) to move so as to press against or move away from the area to be cleaned (9111). And / or, the cleaning unit (1) further includes a support plate (108) and a support drive (109). The cleaning unit (1) and the detection unit (2) are both disposed on the support plate (108). The support plate (108) is connected to the output end of the support drive (109). The support drive (109) is used to drive the support plate (108) to move closer to or away from the frame (901).

9. A method for cleaning the frame of a photovoltaic module, characterized in that, The photovoltaic module frame cleaning device as described in any one of claims 1-8, the photovoltaic module frame cleaning method includes the following steps: The detection unit (2) detects the proportion a of the dirt (9112) to be cleaned in the area (9111) to be cleaned. When a is greater than or equal to the preset value a1, the removal mode is started. When a is less than a1 and greater than or equal to the preset qualified value a0, the wiping mode is started. After completing one cleaning cycle, the detection unit (2) repeats the detection. When a is greater than or equal to a0, the above cleaning action is repeated until a is less than a0. Each time the cleaning is repeated, the pressure of the pressing member (101) against the area to be cleaned (9111) increases.

10. The photovoltaic module frame cleaning method according to claim 9, characterized in that, Both the cleaning unit (1) and the detection unit (2) are mounted on the support plate (108); The removal mode includes the following steps: the controller controls the support plate (108) to move relative to the frame (901), and the pressing member (101) moves relative to the support plate (108) so that the pressing member (101) presses the cleaning cloth (102) against the area to be cleaned (9111), and the pressing member (101) moves along the length direction of the area to be cleaned (9111) to remove the dirt (9112) to be cleaned. And / or, the wiping mode includes the following steps: the detection unit (2) detects the specific location of the dirt (9112) to be cleaned, the controller controls the pressing member (101) to press against the specific location, and controls the pull guide wheel (104) to pull the cleaning cloth (102) to wipe away the dirt (9112).

Images