Solar panel dust removal device and solar panel dust removal system

Abstract

The application relates to a solar panel dust removal device and a solar panel dust removal system. The solar panel dust removal device comprises a charging assembly and a power supply module; the charging assembly is arranged at a preset distance from the light-receiving side of a solar assembly, and comprises a discharge electrode and a grid electrode arranged at intervals, the discharge electrode being arranged on the side of the grid electrode away from the solar assembly; the power supply module is used for providing direct-current high-voltage electricity, the first output end of the power supply module being used for being connected with the discharge electrode, and the second output end of the power supply module being used for being connected with the grid electrode; a potential difference can exist between the discharge electrode and the grid electrode, and a potential difference can exist between the grid electrode and the solar assembly; the discharge electrode is used for discharging to generate charged ions to pass through the grid holes on the grid electrode and combine with the dust on the light-receiving side of the solar assembly to be charged. The charged ions generated by the discharge of the charging assembly can make the dust particles on the surface of the solar panel obtain more charges and improve the electric field force received by the dust particles.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic dust removal, and in particular to a solar panel dust removal device and a solar panel dust removal system. Background Art

[0002] Solar energy resources are abundant and are an important renewable energy source. Driven by my country's powerful photovoltaic industry, photovoltaic power generation has been widely used around the world. However, large-scale photovoltaic power stations are often built in areas dominated by deserts, Gobi, and wastelands. Solar panels in these areas are easily covered with dust, which reduces power generation efficiency. Regular dust removal and cleaning of solar panels is essential to ensure power generation efficiency. In the prior art, electrostatic dust removal is often used to clean solar panels. Electrostatic dust removal is a technology that charges or polarizes dust in a high-voltage electric field and removes it under the action of the electric field force. However, the electrostatic dust removal method in the prior art has problems such as low removal rate of small-particle dust and slow dust removal speed. Summary of the Invention

[0003] Based on this, it is necessary to provide a solar panel dust removal device to address the technical problems of low removal rate of small-particle dust and slow dust removal speed in the existing electrostatic dust removal method.

[0004] A solar panel dust removal device, comprising:

[0005] A charging assembly is arranged at a preset distance on the light-receiving side of the solar module, the charging assembly comprising a discharge electrode and a grid electrode arranged at intervals, the discharge electrode being located on a side of the grid electrode away from the solar module;

[0006] A power supply module, configured to provide DC high voltage electricity, wherein a first output terminal of the power supply module is configured to be connected to the discharge electrode, and a second output terminal of the power supply module is configured to be connected to the grid electrode;

[0007] A potential difference can exist between the discharge electrode and the grid electrode so that a first electric field is formed between the discharge electrode and the grid electrode. A potential difference can exist between the grid electrode and the solar module so that a second electric field is formed between the grid electrode and the solar module. The discharge electrode is used to discharge to generate charged ions, and the charged ions can approach the grid electrode under the action of the first electric field and pass through the grid holes on the grid electrode to combine with dust on the light-receiving side of the solar module to be charged, so that the charged dust particles are detached from the surface of the solar module under the action of the second electric field.

[0008] In one embodiment, the discharge electrode has a plurality of pointed tips arranged in an array on a side facing the grid electrode, and the discharge electrode is used to generate charged ions by corona discharge.

[0009] In one embodiment, the grid electrode has a charge enhancement state and an electrostatic dust removal state; when the grid electrode is in the charge enhancement state, the grid electrode is connected to the second output end, the discharge electrode is connected to the first output end, and the direction of the first electric field is the same as the direction of the second electric field; when the grid electrode is in the electrostatic dust removal state, the grid electrode is connected to the second output end, and the discharge electrode is disconnected from the first output end.

[0010] In one embodiment, when the grid electrode is in the enhanced charge state, the ground reference terminal of the power module is used to connect to the solar component, and the first electric field direction is the same as the second electric field direction.

[0011] In one embodiment, when the grid electrode is in the charge enhancement state, the discharge electrode is at a negative high voltage potential relative to the grid electrode, and when the grid electrode is in the electrostatic dust removal state, the grid electrode is at a positive high voltage potential relative to the solar module; or, when the grid electrode is in the charge enhancement state, the discharge electrode is at a positive high voltage potential relative to the grid electrode, and when the grid electrode is in the electrostatic dust removal state, the grid electrode is at a negative high voltage potential relative to the solar module.

[0012] In one embodiment, the first output end is a high-voltage output end, and the output voltage of the second output end of the power supply module can be adjusted to a high voltage or a low voltage. When the grid electrode is in the charge enhancement state, the output voltage of the second output end is adjusted to a low voltage. When the grid electrode is in the electrostatic dust removal state, the output voltage of the second output end is adjusted to a high voltage.

[0013] In one embodiment, when the grid electrode is in the charge enhancement state, the output voltage of the second output end is zero; and / or, when the grid electrode is in the electrostatic dust removal state, the ground reference end of the power supply module is used to connect to the solar panel.

[0014] In one embodiment, the first output end includes a positive high-voltage end and a negative high-voltage end, and the discharge electrodes are alternately connected to the positive high-voltage end and the negative high-voltage end.

[0015] The present invention also provides a solar panel dust removal system, which can solve at least one of the above technical problems.

[0016] A solar panel dust removal system comprises a solar assembly and the solar panel dust removal device; the solar assembly comprises a solar panel and a metal frame, the metal frame is installed at the four peripheral edges of the solar panel, and the metal frame is connected to the power module or ground; or, the solar assembly comprises a solar panel and a metal support frame, the solar panel is installed on the metal support frame, and the metal support frame is connected to the power module or ground.

[0017] In one embodiment, the solar panel is inclined relative to the horizontal plane.

[0018] Advantages:

[0019] The solar panel dust removal device provided by the embodiment of the application comprises a charging assembly and a power module; the charging assembly is arranged at a preset distance from the light-receiving side of a solar assembly; the charging assembly comprises a discharge electrode and a grid electrode arranged at intervals, and the discharge electrode is arranged on the side of the grid electrode away from the solar assembly; the power module is configured to provide direct-current high-voltage electricity; a first output end of the power module is configured to be connected to the discharge electrode, and a second output end of the power module is configured to be connected to the grid electrode; an electric potential difference can exist between the discharge electrode and the grid electrode to form a first electric field between the discharge electrode and the grid electrode, and an electric potential difference can exist between the grid electrode and the solar assembly to form a second electric field between the grid electrode and the solar assembly; the discharge electrode is configured to generate charged ions by discharge, and the charged ions can move towards the grid electrode under the action of the first electric field and pass through the grid holes in the grid electrode to charge the dust on the light-receiving side of the solar assembly, so that the charged dust particles can be separated from the surface of the solar assembly under the action of the second electric field. In the application, the discharge electrode generates charged ions by discharge, and the charged ions can move towards the grid electrode under the action of the first electric field and pass through the grid holes in the grid electrode to charge the dust particles on the surface of the solar panel to obtain more electric charges, thereby improving the electric field force acting on the dust particles, facilitating the separation of small-particle-size dust particles from the solar panel, and facilitating the removal of the dust particles from the solar panel under the action of gravity or wind force, thereby achieving dust removal and improving the removal rate and dust removal speed of small-particle-size dust. In the application, the dust particles are charged by discharge, and the charging process does not completely depend on the water film, thereby avoiding the influence of low air humidity on dust charging, widening the humidity range in which dust can be efficiently removed, and improving the removal speed of dust in a low-humidity environment.

[0020] The present invention also provides a solar panel dust removal system, comprising a solar module and the aforementioned solar panel dust removal device; the solar module comprising a solar panel and a metal frame, the metal frame being mounted around the edges of the solar panel and connected to a power module or grounded; or the solar module comprising a solar panel and a metal support frame, the solar panel being mounted on the metal support frame, and the metal support frame being connected to a power module or grounded. This solar panel dust removal system can achieve at least one of the aforementioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a solar panel dust removal device provided by one embodiment of the present invention.

[0022] Figure 2 A schematic diagram of a solar panel dust removal device according to an embodiment of the present invention showing a grid electrode in an enhanced charge state.

[0023] Figure 3 A schematic diagram of a grid electrode in an electrostatic dust removal state in a solar panel dust removal device provided by one embodiment of the present invention.

[0024] Figure 4 The present invention provides a circuit connection structure in a solar panel dust removal device according to an embodiment of the present invention.

[0025] Figure 5 A schematic diagram of a solar panel dust removal device provided by another embodiment of the present invention.

[0026] Figure 6 A partial schematic diagram of a solar panel dust removal system provided by one embodiment of the present invention.

[0027] Figure Number:

[0028] 100-power module; 120-first output terminal; 130-second output terminal; 200-charged component; 210-discharge electrode; 220-grid electrode; 221-first electrode; 222-second electrode; 230-tip; 240-support; 250-charged dust particles; 260-charged ions; 300-solar module; 310-solar panel; 320-internal electrode; 330-metal frame; 340-metal support frame. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] See Figure 1 、 Figure 2 and Figure 3 , Figure 1 A schematic diagram of a solar panel dust removal device provided by one embodiment of the present invention. Figure 2 A schematic diagram of a solar panel dust removal device according to an embodiment of the present invention showing a grid electrode in an enhanced charge state. Figure 3 A schematic diagram of a solar panel dust removal device according to one embodiment of the present invention, showing a grid electrode in an electrostatic dust removal state. The solar panel dust removal device according to one embodiment of the present invention includes a charging assembly 200 and a power module 100. The charging assembly 200 is positioned at a predetermined distance from the light-receiving side of a solar panel 300. The charging assembly 200 includes a discharge electrode 210 and a grid electrode 220 spaced apart from each other. The discharge electrode 210 is positioned on the side of the grid electrode 220 away from the solar panel 300.

[0036] The power module 100 is used to provide DC high voltage power. The first output terminal 120 of the power module 100 is used to connect to the discharge electrode 210, and the second output terminal 130 of the power module 100 is used to connect to the grid electrode 220. A potential difference can exist between the discharge electrode 210 and the grid electrode 220, so that a first electric field is formed between the discharge electrode 210 and the grid electrode 220. A potential difference can exist between the grid electrode 220 and the solar module 300, so that a second electric field is formed between the grid electrode 220 and the solar module 300. The discharge electrode 210 is used to discharge and generate charged ions 260. Under the action of the first electric field, the charged ions 260 can approach the grid electrode 220 and pass through the grid holes in the grid electrode 220 to combine with dust on the light-receiving side of the solar module 300 and charge it. Under the action of the second electric field, the charged dust particles 250 are separated from the surface of the solar module 300.

[0037] Specifically, in the present application, charged ions 260 are generated by discharge through the discharge electrode 210, and the charged ions 260 can approach the grid electrode 220 under the action of the first electric field, and pass through the grid holes on the grid electrode 220, and fall onto the dust particles on the surface of the solar panel 310 to charge them and obtain more charges, thereby increasing the electric field force on the dust particles, thereby facilitating the separation and bounce of small-sized dust particles relative to the solar panel 310, so that they can be moved out of the solar panel 310 under the action of gravity or wind force, thereby achieving dust removal, thereby improving the removal rate and dust removal speed of small-sized dust particles.

[0038] Among them, the dust particles are charged through discharge, so that the charging process is not completely dependent on water vapor, avoiding the impact of low air humidity on dust charging, thereby broadening the humidity range for efficient dust removal and improving the dust removal speed in low humidity environments.

[0039] It should be noted that there is a potential difference between the grid electrode 220 and the solar module 300. In the process of forming a second electric field between the grid electrode 220 and the solar module 300, the dust particles on the light-receiving side of the solar panel 310 can also be charged with the assistance of water vapor, thereby further increasing the number of charged dust particles on the surface of the solar panel 310 and enhancing the electric field force on the dust particles.

[0040] It should also be noted that the solar module 300 can be connected to the power module 100, or disconnected from the power module 100 and grounded, as long as a potential difference can be achieved between the grid electrode 220 and the solar module 300, and a second electric field is formed between the grid electrode 220 and the solar module 300, so that the charged dust particles on the light-receiving side of the solar module 300 can be detached from the surface of the solar module 300.

[0041] See Figure 1 and Figure 2 In one embodiment, the discharge electrode 210 has a plurality of tips 230 arranged in an array on a side facing the grid electrode 220 , and the discharge electrode 210 is used to generate charged ions 260 by corona discharge.

[0042] Specifically, the discharge electrode 210 is a needle-shaped or tooth-shaped electrode. The high-voltage DC power provided by the power module 100 generates a high-voltage current between the discharge electrode 210 and the grid electrode 220. By regulating the output voltage of the power module 100, a continuous and controllable corona discharge occurs between the discharge electrode 210 and the grid electrode 220. The gas ions generated by the discharge, under the action of the first electric field, pass through the grid holes of the grid electrode 220 toward the solar panel 310, ultimately charging dust particles on the light-receiving side of the solar panel 310. Preferably, one tip 230 can correspond to multiple grids of the grid electrode 220.

[0043] When the discharge electrode 210 is at a positive high voltage potential relative to the grid electrode 220, corona discharge generates positive ions toward the grid electrode 220, positively charging the dust particles. When the discharge electrode 210 is at a negative high voltage potential relative to the grid electrode 220, corona discharge generates negative ions toward the grid electrode 220, negatively charging the dust particles. Preferably, the grid electrode 220 has a mesh size ranging from 1 mm to 10 mm, and the distance between the tip 230 and the grid electrode 220 ranges from 5 mm to 30 mm.

[0044] In other embodiments, an insulating medium is inserted between the discharge electrode 210 and the grid electrode 220 to perform dielectric barrier discharge. It should be noted that other discharge methods are also possible and the present embodiment is not limited thereto.

[0045] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 4 This is a circuit connection structure for a solar panel dust removal device according to one embodiment of the present invention. In one embodiment, the grid electrode 220 has a charge-enhanced state and an electrostatic dust removal state. When the grid electrode 220 is in the charge-enhanced state, the grid electrode 220 is connected to the second output terminal 130, and the discharge electrode 210 is connected to the first output terminal 120. When the grid electrode 220 is in the electrostatic dust removal state, the grid electrode 220 is connected to the second output terminal 130, and the discharge electrode 210 is disconnected from the first output terminal 120.

[0046] Specifically, when the grid electrode 220 is in the enhanced charge state, the grid electrode 220 is connected to the second output terminal 130 and the discharge electrode 210 is connected to the first output terminal 120 , so that a potential difference is formed between the grid electrode 220 and the discharge electrode 210 , so that the discharge electrode 210 discharges.

[0047] When the grid electrode 220 is in the electrostatic dust removal mode, the grid electrode 220 is connected to the second output terminal 130, and the solar panel 300 is connected to the power module 100 or disconnected from the power module 100 and grounded. This creates a potential difference between the grid electrode 220 and the solar panel 300, and the discharge electrode 210 is disconnected from the second output terminal 130. This reduces interference with the second electric field between the grid electrode 220 and the solar panel 300, causing the charged dust particles 250 on the surface of the solar panel 310 to be subjected to a stable electrostatic force directed toward the grid electrode 220. This forces the charged dust particles 250 to break away from the solar panel 310 and move toward the grid electrode 220, thereby improving the reliability of the solar panel dust removal device. Preferably, the distance between the grid and the surface of the solar panel 310 ranges from 5 mm to 25 mm.

[0048] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In one embodiment, the solar panel dust removal device further includes a controller electrically connected to the power module 100. In an initial state, the controller controls the grid electrode 220 to connect to the second output terminal 130 and the discharge electrode 210 to connect to the first output terminal 120, placing the grid electrode 220 in a charge-enhanced state for charge-enhanced operation. After the charge-enhanced operation continues for a first preset time, the controller controls the discharge electrode 210 to disconnect from the first output terminal 120, switching the grid electrode 220 from the charge-enhanced state to an electrostatic dust removal state for electrostatic dust removal. After the electrostatic dust removal operation continues for a second preset time, the controller controls the discharge electrode 210 to connect to the first output terminal 120 for cycle operation.

[0049] Furthermore, the solar panel dust removal device further includes a detector electrically connected to the controller. The controller controls the detection element to detect whether the dust on the surface of the solar panel 310 has been cleaned. If so, the controller shuts down the system. If not, the controller controls the system to cycle until the cleaning is complete. It should be noted that in other embodiments, the operating time can also be controlled by setting the number of cycles.

[0050] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In one embodiment, when the grid electrode 220 is in the charge-enhanced state, the direction of the first electric field is the same as the direction of the second electric field, so that the charged ions 260 passing through the grid holes on the grid electrode 220 can continue to approach the solar component 300 to combine with the dust on the light-receiving side of the solar panel 310 to be charged, thereby improving the efficiency of charging the dust particles on the light-receiving side of the solar panel 310.

[0051] It should be noted that when the grid electrode 220 is in the enhanced charge state, the solar module 300 is connected to the power module 100 or disconnected from the power module 100 and grounded, and it is sufficient to ensure that the first electric field direction is the same as the second electric field direction.

[0052] In other embodiments, when the grid electrode 220 is in the enhanced charge state, the potential difference between the grid electrode 220 and the solar module 300 is zero.

[0053] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4In one embodiment, when the grid electrode 220 is in the charge enhancement state, the ground reference end of the power module 100 is connected to the solar module 300, so that a stable potential difference is formed between the grid electrode 220 and the solar module 300, and the charged ions passing through the grid holes of the grid electrode 220 can stably move along the electric field lines of the second electric field to approach the solar panel 310, thereby improving the uniformity of the charge of the dust particles on the light-receiving side of the solar panel 310.

[0054] Further, when the grid electrode 220 is in the electrostatic dust removal state, the ground reference end of the power module 100 is connected to the solar module 300, thereby improving safety.

[0055] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in one embodiment, when the grid electrode 220 is in the charge enhancement state, the discharge electrode 210 is at a negative high voltage potential relative to the grid electrode 220, and when the grid electrode 220 is in the electrostatic dust removal state, the grid electrode 220 is at a positive high voltage potential relative to the solar module 300.

[0056] Specifically, when the discharge electrode 210 is at a negative high voltage potential relative to the grid electrode 220, the corona discharge generates negative ions in the direction of the grid electrode 220, and the dust particles are negatively charged. When the solar module 300 is at a negative high voltage potential relative to the grid electrode 220, the electric field direction is from the grid electrode 220 to the photovoltaic module, so that the dust particles with negative charges move in the direction of the grid electrode 220 away from the solar panel 310.

[0057] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in another embodiment, when the grid electrode 220 is in the charge enhancement state, the discharge electrode 210 is at a positive high voltage potential relative to the grid electrode 220, and when the grid electrode 220 is in the electrostatic dust removal state, the grid electrode 220 is at a negative high voltage potential relative to the solar module 300.

[0058] Specifically, when the discharge electrode 210 is at a positive high voltage potential relative to the grid electrode 220, the corona discharge generates positive ions in the direction of the grid electrode 220, and the dust particles are positively charged. When the solar module 300 is at a positive high voltage potential relative to the grid electrode 220, the electric field direction is from the photovoltaic module to the grid electrode 220, so that the dust particles with positive charges move in the direction of the grid electrode 220 away from the solar panel 310.

[0059] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4In one embodiment, the first output terminal 120 is a high-voltage output terminal, and the output voltage of the second output terminal 130 of the power module 100 can be adjusted to a high voltage or a low voltage. When the grid electrode 220 is in the enhanced charge state, the output voltage of the second output terminal 130 is adjusted to a low voltage, thereby ensuring a high voltage potential between the discharge electrode 210 and the grid electrode 220 while improving safety. When the grid electrode 220 is in the electrostatic dust removal state, the output voltage of the second output terminal 130 is adjusted to a high voltage, thereby ensuring a high voltage potential between the grid electrode 220 and the solar module 300.

[0060] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In one embodiment, the first output terminal 120 includes a positive high-voltage terminal and a negative high-voltage terminal, and the discharge electrodes 210 are alternately connected to the positive high-voltage terminal and the negative high-voltage terminal.

[0061] Specifically, there is a potential difference between the grid electrode 220 and the solar component 300. Through capacitive coupling, an electric field is formed between the grid electrode 220 and the solar panel 310, so that the dust on the light-receiving side of the solar panel 310 is charged with the assistance of water vapor, so that the dust particles have positively charged dust particles and negatively charged dust particles. By alternately connecting the discharge electrode 210 to the positive high-voltage terminal and the negative high-voltage terminal, the direction of the first electric field is alternately changed. In order to ensure that the charge combined with the dust through corona discharge can be separated from the solar module 300 under the action of the second electric field, in the electrostatic dust removal state, the voltage connecting the grid electrode 220 and the solar module 300 needs to be adjusted to change the direction of the electric field between the grid electrode 220 and the solar module 300. Therefore, when the discharge electrode 210 is alternately connected to the positive high-voltage terminal and the negative high-voltage terminal, the direction of the electric field between the grid electrode 220 and the solar module 300 is synchronously changed alternately, so that the positively charged and negatively charged dust particles on the solar panel 310 can be subjected to a force away from the solar panel 310, so that the light-receiving side of the solar panel 310 does not accumulate charges of a specific polarity, so that the positively charged and negatively charged dust particles on the solar panel can bounce relative to the solar panel to be removed, making the dust removal efficiency higher.

[0062] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , Figure 5A schematic diagram of a solar panel dust removal device according to another embodiment of the present invention. In one embodiment, the grid electrode 220 includes a first electrode 221 and a second electrode 222 spaced apart from each other. The first electrode 221 is located on the side of the second electrode 222 that is closer to the discharge electrode 210. A potential difference can exist between the first electrode 221 and the discharge electrode 210 to form a first electric field. A potential difference exists between the second electrode 222 and the solar panel 300 to form a second electric field. A potential difference exists between the first electrode 221 and the second electrode 222 to form a third electric field. This allows charged ions 260 that pass through the grid holes of the first electrode 221 to pass through the grid holes of the second electrode 222 under the action of the third electric field and approach the solar panel 300.

[0063] Specifically, the first electrode 221 is connected to the low voltage of the second output terminal 130, the second electrode 222 is connected to the high voltage of the second output terminal 130, and the direction of the third electric field between the first electrode 221 and the second electrode 222 is the same as the direction of the first electric field, thereby allowing the charged ions 260 to approach the solar panel 310 via the third electric field. The provision of the first electrode 221 and the second electrode 222 can reduce the switching between the grid electrode 220 and the second output terminal 130, thereby improving operational convenience.

[0064] In other embodiments, the first electrode 221 and the second electrode 222 may be integrally formed.

[0065] In other embodiments, the solar panel dust removal device also includes a wind generating element, which is arranged on one side of the grid electrode 220. The wind generating element is used to generate wind toward the area between the solar panel 310 and the grid electrode 220 to blow out the charged dust particles 250 floating in the area between the solar panel 310 and the grid electrode 220, thereby improving the dust removal efficiency.

[0066] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 , Figure 6 A partial schematic diagram of a solar panel dust removal system according to one embodiment of the present invention. In one embodiment, the solar panel dust removal system further includes a support 240 mounted on the frame or support frame of the solar panel 310, and the grid electrode 220 and the discharge electrode 210 are connected to the support 240.

[0067] In other embodiments, the solar panel dust removal device further includes a moving mechanism, to which the grid electrode 220 and the discharge electrode 210 are connected. The moving mechanism is configured to drive the grid electrode 220 and the discharge electrode 210 to move relative to the solar panels to remove dust from the arrayed solar panels. The power module 100 is mounted on the moving mechanism.

[0068] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 An embodiment of the present invention further provides a solar panel 310 dust removal system, comprising a solar module 300 and the above-mentioned solar panel dust removal device; the solar module 300 comprises a solar panel 310 and a metal frame 330, the metal frame 330 is installed at the four edges of the solar panel 310, and the metal frame 330 is connected to the power module 100 or grounded; or, the solar module 300 comprises a solar panel 310 and a metal support frame 340, the solar panel 310 is installed on the metal support frame 340, and the metal support frame 340 is connected to the power module 100 or grounded.

[0069] Specifically, the metal frame 330 or metal support frame 340 of the solar panel 310 is connected to or grounded with the power module 100. Capacitive coupling between the grid electrode 220, the internal electrodes 320 of the solar panel 310, and the metal frame 330 or metal support frame 340 of the solar panel 310 allows a second electric field to be formed between the grid electrode 220 and the solar panel 310. In other words, the electric field can be formed between the grid electrode 220 and the solar panel 310 simply by connecting or grounding the metal frame 330 or metal support frame of the solar panel 310 to the power module 100, thereby preventing the internal electrodes 320 of the solar panel 310 from being connected to the power module 100 and thus preventing the internal electrodes 320 of the solar panel 310 from being exposed, simplifying the structure, and improving safety.

[0070] It should be noted that the solar panel 310 is divided into a framed solar panel and a frameless solar panel. When the solar panel 310 is a framed solar panel, the metal frame 330 is connected to the power module 100 or grounded, thereby forming a capacitor with the grid electrode 220. When the solar panel 310 is a frameless solar panel, the frameless solar panel is fixed to the metal support frame 340, which is connected to the power module 100 or grounded, thereby forming a capacitor with the upper electrode.

[0071] In other embodiments, the internal electrode 320 of the solar panel 310 may be connected to a power module or grounded.

[0072] See Figure 1 and Figure 6In one embodiment, the solar panel 310 is tilted relative to the horizontal plane, so that the charged dust particles 250 are subjected to a component force toward the lower side of the solar panel 310 under the action of gravity and the electric field. As a result, during the process of repeated bouncing of the charged dust particles 250 relative to the grid electrode 220, they can gradually move toward the lower side of the solar panel 310 for dust removal.

[0073] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A solar panel dust removal device, characterized in that: The solar panel dust removal device comprises: A charging assembly is arranged at a preset distance on the light-receiving side of the solar module, the charging assembly comprising a discharge electrode and a grid electrode arranged at intervals, the discharge electrode being located on a side of the grid electrode away from the solar module; A power supply module, configured to provide DC high voltage electricity, wherein a first output terminal of the power supply module is configured to be connected to the discharge electrode, and a second output terminal of the power supply module is configured to be connected to the grid electrode; A potential difference can exist between the discharge electrode and the grid electrode so that a first electric field is formed between the discharge electrode and the grid electrode. A potential difference can exist between the grid electrode and the solar module so that a second electric field is formed between the grid electrode and the solar module. The discharge electrode is used to discharge to generate charged ions, and the charged ions can approach the grid electrode under the action of the first electric field and pass through the grid holes on the grid electrode to combine with dust on the light-receiving side of the solar module to be charged, so that the charged dust particles are detached from the surface of the solar module under the action of the second electric field.

2. The solar panel dust removal device according to claim 1, characterized in that: The discharge electrode has a plurality of pointed ends arranged in an array on a side facing the grid electrode. The discharge electrode is used for generating charged ions by corona discharge.

3. The solar panel dust removal device according to claim 1, characterized in that: The grid electrode has a charge enhancement state and an electrostatic dust removal state; When the grid electrode is in the charge enhancement state, the grid electrode is connected to the second output end, and the discharge electrode is connected to the first output end; when the grid electrode is in the electrostatic dust removal state, the grid electrode is connected to the second output end, and the discharge electrode is disconnected from the first output end.

4. The solar panel dust removal device according to claim 3, characterized in that: When the grid electrode is in the enhanced charge state, the direction of the first electric field is the same as the direction of the second electric field.

5. The solar panel dust removal device according to claim 4, characterized in that: When the grid electrode is in the enhanced charge state, the ground reference terminal of the power module is used to be connected to the solar component.

6. The solar panel dust removal device according to claim 3, characterized in that: When the grid electrode is in the charge enhancement state, the discharge electrode is at a negative high voltage potential relative to the grid electrode, and when the grid electrode is in the electrostatic dust removal state, the grid electrode is at a positive high voltage potential relative to the solar module; or, when the grid electrode is in the charge enhancement state, the discharge electrode is at a positive high voltage potential relative to the grid electrode, and when the grid electrode is in the electrostatic dust removal state, the grid electrode is at a negative high voltage potential relative to the solar module.

7. The solar panel dust removal device according to claim 6, characterized in that: The first output end is a high-voltage output end, and the output voltage of the second output end of the power supply module can be adjusted to a high voltage or a low voltage. When the grid electrode is in the charge enhancement state, the output voltage of the second output end is adjusted to a low voltage. When the grid electrode is in the electrostatic dust removal state, the output voltage of the second output end is adjusted to a high voltage.

8. The solar panel dust removal device according to claim 6, characterized in that: The first output end includes a positive high-voltage end and a negative high-voltage end, and the discharge electrodes are alternately connected to the positive high-voltage end and the negative high-voltage end.

9. A solar panel dust removal system, characterized in that: A solar panel dust removal device comprising a solar module and any one of claims 1 to 8; The solar module includes a solar panel and a metal frame, the metal frame is installed at the four edges of the solar panel, and the metal frame is connected to the power module or grounded; or, the solar module includes a solar panel and a metal support frame, the solar panel is installed on the metal support frame, and the metal support frame is connected to the power module or grounded.

10. The solar panel dust removal system according to claim 9, characterized in that: The solar panels are inclined relative to a horizontal plane.

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