Ultrasonic dust removal system for large-inclination-angle photovoltaic panel and dust removal method of ultrasonic dust removal system
By integrating ultrasonic transducers on the back of the large inclination photovoltaic panel, non-contact dust removal is achieved using the surface waveform, the problems of low dust removal efficiency and poor environmental adaptability of the large inclination photovoltaic panel are solved, and efficient and stable cleaning effects and extended photovoltaic panel life are achieved.
Patent Information
- Application Number
- CN202510765222.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-10
- Publication Date
- 2025-08-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, large-incline photovoltaic panels have low dust removal efficiency, complex structure, and poor operating environment adaptability. Conventional cleaning methods are difficult to efficiently clean under complex environments such as high latitudes or mountainous areas, and are prone to damage the equipment or reduce the life of the photovoltaic panels.
Ultrasonic transducers are used to combine surface waveforms such as Rayleigh wave, Lefu wave, and Stonelie wave. Ultrasonic transducers are integrated on the back of the photovoltaic panel to achieve non-contact dust removal, covering the surface of the photovoltaic panel and removing dust.
It realizes efficient, stable and low-cost photovoltaic panel cleaning, adapts to various environments, avoids mechanical wear, extends the life of photovoltaic panels, and improves power generation efficiency and economic benefits.
Smart Images
Figure CN120479867A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of photovoltaic panels, and in particular to an ultrasonic dust removal system and a dust removal method for photovoltaic panels with large tilt angles. Background Art
[0002] In high-latitude regions, where solar radiation is at a low angle, photovoltaic panels are often installed at a steep angle to maximize sunlight utilization. This is also necessary in mountainous and hilly areas due to topographical constraints. However, these regions often face natural environmental challenges such as frequent sandstorms and dry air during the winter and spring, leading to dust deposition, a significant factor affecting photovoltaic power generation efficiency. High-angle photovoltaic panels are particularly susceptible to the accumulation of fine, sticky dust particles, such as sand and industrial emissions, due to their prolonged exposure to the external environment. This dust not only affects the panels' light transmittance but can also combine with moisture to form stubborn stains. Conventional water washing or mechanical cleaning methods are difficult to implement at high-angle installations, resulting in low efficiency and high maintenance costs. Therefore, the development of an efficient, non-contact cleaning method tailored to the characteristics of high-angle photovoltaic panels is crucial. Existing dust removal technologies for high-angle photovoltaic panels primarily include mechanical and water-flushing methods, but both have significant limitations in practical application. Mechanical dust removal relies on brushes, rollers and other equipment to directly contact the surface of the photovoltaic panel for physical wiping and cleaning. Although the operation is relatively simple, it is unstable under high-angle installation conditions and is prone to slippage or jamming. Long-term contact can easily cause scratches on the surface of the photovoltaic panel, affecting the light transmittance and service life. At the same time, the equipment is susceptible to erosion by wind and sand, and maintenance is frequent and costly. Although water-flushing dust removal can cover a large area and has a certain cleaning effect, it is heavily dependent on water resources. In winter, in high-latitude areas, it is prone to freezing due to low temperatures, affecting the normal operation of the system and may even damage the equipment. In addition, water flushing has limited effect on removing dust that is highly adhesive or electrostatically adsorbed, making it difficult to clean thoroughly. In summary, existing dust removal methods generally have problems such as low efficiency, high energy consumption, and poor environmental adaptability in high-angle photovoltaic applications. There is an urgent need to develop a new cleaning technology that is efficient, non-contact, easy to maintain, and adaptable to complex environments. Summary of the Invention
[0003] This invention aims to address the existing challenges of low dust removal efficiency, complex structure, and poor adaptability to operating environments for high-angle photovoltaic panels. By proposing an ultrasonic non-contact dust removal system with simple structure, stable operation, and strong adaptability, this system integrates an ultrasonic transducer on the back of the photovoltaic panel. This system, combined with surface-propagating waveforms (such as Rayleigh and Stoneley waves), leverages the influence of gravity on the high-angle photovoltaic panels to achieve efficient cleaning of the entire panel surface without relying on external mechanical structures or water sources.
[0004] To achieve the above objectives, the present invention provides an ultrasonic dust removal system for photovoltaic panels with large tilt angles, and the present invention adopts the following technical solutions: An ultrasonic dust removal system for photovoltaic panels with large inclination angles includes an ultrasonic frequency control module and an ultrasonic photovoltaic panel dust removal module. The ultrasonic frequency control system consists of an ultrasonic waveform controller and an ultrasonic generator connected in sequence, generating a specific programmed waveform signal and converting it into a driving electrical signal. The ultrasonic photovoltaic panel dust removal module includes an ultrasonic transducer and a photovoltaic panel. The ultrasonic photovoltaic panel dust removal module primarily receives the electrical signal from the upstream ultrasonic frequency control module and converts it into an ultrasonic wave with a set waveform and frequency via the ultrasonic transducer to remove dust from the photovoltaic panel surface. The photovoltaic panel is installed at an inclination angle greater than 25°.
[0005] A further improvement of the present invention is that when the photovoltaic panel area is less than 1.6m 2 When the ultrasonic transducer is installed at the center of the photovoltaic panel, the number of the ultrasonic transducer is 1.
[0006] A further improvement of the present invention is that when the photovoltaic panel area is greater than 1.6m 2 When the ultrasonic transducers are installed, there are multiple ones, which are symmetrically distributed at both ends along the central long axis of the photovoltaic panel. The distance between the installation position and the edge of the photovoltaic panel is 1 / 8-1 / 5 of the total length of the photovoltaic panel, and the installation height is 1 / 2 of the total height of the photovoltaic panel.
[0007] Preferably, the ultrasonic transducer and the photovoltaic panel are fixed by an anti-high temperature aging adhesive, and the adhesive can withstand a temperature range of -40°C to 120°C and has waterproof properties.
[0008] A further improvement of the present invention is that the shape of the ultrasonic transducer can be circular or rectangular, and the material of the ultrasonic transducer can be lead zirconate titanate (PZT), P4 ceramic or titanium alloy.
[0009] A further improvement of the present invention is that the programming waveform used by the ultrasonic waveform controller (1.1) can be in the form of surface waves such as Rayleigh waves, Love waves or Stoneley waves, which have good surface propagation performance and dust removal efficiency.
[0010] A further improvement of the present invention is that the operating frequency of the ultrasonic transducer is set to 20kHz to 80kHz, wherein 20kHz-40kHz is used to remove general adherent dust, and 40kHz-80kHz is used to remove pollutants with strong viscosity, meeting the needs of use in multiple scenarios.
[0011] Compared with the existing inventions, the present invention has the following beneficial effects: 1. This invention targets applications involving photovoltaic panels with high inclination angles. By integrating one or more ultrasonic transducers on the back of the panels and combining them with ultrasonic surface waveforms such as Rayleigh, Love, and Stoneley waves, this method achieves uniform excitation and vibration across the entire surface of the photovoltaic module, effectively removing accumulated dust. This approach eliminates the need for traditional mechanical structures such as brush arms and slide rails, making it particularly well-suited to addressing the structural limitations and blind spots associated with high-inclination installations, effectively covering the entire area, including the edges. The system's fully integrated design eliminates the need for external moving parts, significantly reducing mechanical wear and maintenance frequency, and significantly improving system stability and long-term operational reliability.
[0012] 2. This invention utilizes ultrasonic, non-contact, active cleaning technology, requiring no water or compressed gas during operation. It is particularly well-suited for environments such as high-latitude drought, low-temperature freezing, and water scarcity, thoroughly resolving issues such as icing, component corrosion, and electrical safety hazards associated with water-washing dust removal. The system supports frequency regulation within a 20kHz–80kHz range, enabling efficient removal of dust and pollutants with varying adhesion characteristics. It exhibits excellent environmental adaptability and broad versatility. It can operate stably even in high-dust, high-temperature, and frequently windy, high-angle photovoltaic scenarios, effectively reducing cleaning energy consumption and labor costs, significantly improving the overall power generation efficiency and economic benefits of photovoltaic power stations.
[0013] 3. By using ultrasonic vibration to remove dust from photovoltaic panels with large tilt angles, the physical wear of the photovoltaic glass surface and anti-reflective coating caused by mechanical scrubbing is avoided, effectively extending the life of the components and overcoming the problem of increased power attenuation of photovoltaic panels due to mechanical friction in existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a system framework diagram of the present invention; Figure 2 This is a back view of a photovoltaic panel embodiment 1 of the present invention; Figure 3 This is a back view of a second embodiment of a photovoltaic panel of the present invention; Figure 4 It is a side view of the photovoltaic panel of the present invention.
[0015] Among them, 1. Ultrasonic frequency control system; 1.1. Ultrasonic waveform controller; 1.2. Ultrasonic generator; 2. Ultrasonic photovoltaic panel dust removal module; 2.1. Ultrasonic transducer; 2.2. Photovoltaic panel. DETAILED DESCRIPTION
[0016] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Specific implementation 1: This embodiment is an ultrasonic dust removal system for photovoltaic panels with large tilt angles. Dust accumulation on photovoltaic panels during long-term outdoor operation will cause a decrease in photovoltaic output power.
[0018] An ultrasonic dust removal system for photovoltaic panels with large inclination angles includes an ultrasonic frequency control module 1 and an ultrasonic photovoltaic panel dust removal module 2. The ultrasonic frequency control module is composed of an ultrasonic waveform controller 1.1 and an ultrasonic generator 1.2 connected in sequence, and is used to generate a specific programmed waveform signal and convert it into a driving electrical signal. The ultrasonic photovoltaic panel dust removal module 2 includes an ultrasonic transducer 2.1 and a photovoltaic panel 2.2. The ultrasonic photovoltaic panel dust removal module 2 primarily receives the electrical signal emitted by the upstream ultrasonic frequency control module and converts it into an ultrasonic wave with a set waveform and frequency via the ultrasonic transducer 2.1 to remove dust from the photovoltaic panel surface. The photovoltaic panel 2.2 is installed at an inclination angle greater than 25°.
[0019] Specifically, in this embodiment, the photovoltaic panel area is ≤ 1.6m 2 The number of the ultrasonic transducer 2.1 is one and is installed at the center of the photovoltaic panel.
[0020] Preferably, the ultrasonic transducer 2.1 and the photovoltaic panel 2.2 are fixed by a high-temperature aging-resistant adhesive, and the adhesive has a temperature resistance range of -40°C to 120°C and is waterproof.
[0021] Specifically, the shape of the ultrasonic transducer 2.1 may be circular or rectangular, and the material of the ultrasonic transducer may be lead zirconate titanate (PZT), P4 ceramics, or titanium alloy.
[0022] Specifically, the programming waveform used by the ultrasonic waveform controller 1.1 can be a surface wave form such as Rayleigh wave, Love wave or Stoneley wave, which has good surface propagation performance and dust removal efficiency.
[0023] Specifically, the operating frequency of the ultrasonic transducer 2.1 is set to 20kHz to 80kHz, of which 20kHz-40kHz is used to remove general adherent dust, and 40kHz-80kHz is used to remove pollutants with strong viscosity, meeting the needs of use in multiple scenarios.
[0024] The device of the dust removal method of an ultrasonic dust removal system for photovoltaic panels with large tilt angles described below and the ultrasonic dust removal system for photovoltaic panels with large tilt angles described above can correspond to each other.
[0025] The present invention also provides a dust removal method for an ultrasonic dust removal system of a photovoltaic panel with a large tilt angle, comprising the following steps: The present invention is further carried out in the following steps: Step 1: Install the ultrasonic frequency control module 1, which includes an ultrasonic waveform controller 1.1 and an ultrasonic generator 1.2. The ultrasonic waveform controller 1.1 generates a specific programmed waveform, such as Rayleigh waves, Love waves, or Stoneley waves, and simultaneously inputs the waveform signal to the ultrasonic generator 1.2, which converts the waveform signal into an electrical signal.
[0026] Step 2: Construct an ultrasonic photovoltaic panel dust removal module 2, wherein the ultrasonic photovoltaic panel dust removal module 2 includes an ultrasonic transducer 2.1 and a photovoltaic panel 2.2.
[0027] Step 3: The ultrasonic transducer 2.1 receives the electrical signal generated by the ultrasonic generator 1.2 and generates ultrasonic vibrations. The ultrasonic vibration frequency is 20kHz-40kHz or 40kHz-80kHz according to the dust adhesion. The vibrations propagate along the surface of the photovoltaic panel, forming a surface wave effect, which effectively shakes off the dust, particulate matter or pollutants attached to the surface of the photovoltaic panel with a large tilt angle. Specific implementation 2: See Figure 3 As shown, in this embodiment, the photovoltaic panel area is greater than 1.6m2, and the number of the ultrasonic transducers 2.1 is 2, which are symmetrically distributed at both ends along the central long axis direction of the photovoltaic panel 2.2. The installation position is 1 / 8-1 / 5 of the total length of the photovoltaic panel from the edge of the photovoltaic panel, and the installation height is 1 / 2 of the total height of the photovoltaic panel. This symmetrical layout helps the ultrasonic energy to form a uniform wave distribution on the surface of the photovoltaic panel, thereby improving the efficiency of removing dust from a larger area of the panel.
[0029] The ultrasonic waves generated by multiple ultrasonic transducers can be superimposed, and the dust removal effect can be changed by changing different ultrasonic transducers. The remaining steps are consistent with implementation mode 1.
[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. An ultrasonic dust removal system for photovoltaic panels with large tilt angles, characterized in that: include: An ultrasonic frequency control module (1) and an ultrasonic photovoltaic panel dust removal module (2) are provided. The ultrasonic frequency control module (1) comprises an ultrasonic waveform controller (1.1) and an ultrasonic generator (1.2). The ultrasonic frequency control module (1) mainly functions to convert a programmed waveform and a set frequency into an electrical signal, and transmit the electrical signal to a downstream ultrasonic photovoltaic panel dust removal module (2). The ultrasonic photovoltaic panel dust removal module (2) comprises an ultrasonic transducer (2.1) and a photovoltaic panel (2.2). The ultrasonic photovoltaic panel dust removal module (2) mainly functions to receive the electrical signal emitted by the upstream ultrasonic frequency control module (1), and convert the electrical signal into an ultrasonic wave with a set waveform and frequency through the ultrasonic transducer (2.1) to complete the removal of dust on the surface of the photovoltaic panel (2.2). The photovoltaic panel (2.2) is installed at an inclination angle greater than 25°.
2. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: When the area of the photovoltaic panel (2.2) is less than or equal to 1.6m 2 When the ultrasonic transducer (2.1) is provided in one piece, it is installed at the center of the photovoltaic panel.
3. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: When the area of the photovoltaic panel (2.2) is greater than 1.6m 2 When the ultrasonic transducers (2.1) are multiple in number and symmetrically arranged along the central long axis of the component, the installation position is 1 / 8 to 1 / 5 of the total length of the photovoltaic panel (2.2) from the edge of the panel, and the vertical installation height is 1 / 2 of the total height of the photovoltaic panel (2.2).
4. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 3, characterized in that: The ultrasonic waves generated by multiple ultrasonic transducers can be superimposed, and the dust removal effect can be changed by changing different ultrasonic transducers.
5. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: The ultrasonic transducer (2.1) is fixed to the back of the photovoltaic panel (2.2) by a high-temperature resistant and anti-aging adhesive. The adhesive has a temperature resistance of -40°C to 120°C and is waterproof.
6. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: The shape of the ultrasonic transducer (2.1) can be circular or rectangular, and the material of the ultrasonic transducer can be lead zirconate titanate (PZT), P4 ceramic or titanium alloy.
7. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: The working frequency of the ultrasonic transducer (2.1) is 20kHz-80kHz, wherein the first working frequency band 20kHz-40kHz is used for removing adherent dust, and the second working frequency band 40kHz-80kHz is used for removing viscous pollutants.
8. The ultrasonic dust removal system for photovoltaic panels with large tilt angles according to claim 1, characterized in that: The waveform controller (1.1) supports the generation of surface propagation waveforms such as Rayleigh waves, Love waves, and Stoneley waves to improve the dust removal coverage and efficiency.
9. A dust removal method for an ultrasonic dust removal system for photovoltaic panels with large tilt angles, applied to an ultrasonic dust removal system for photovoltaic panels with large tilt angles as claimed in any one of claims 1 to 8, characterized in that: The following steps are included: Step 1: Install an ultrasonic frequency control module (1), which includes an ultrasonic waveform controller (1.1) and an ultrasonic generator (1.2). The ultrasonic waveform controller (1.1) generates a specific programmed waveform, such as Rayleigh wave, Love wave, Stoneley wave, etc., and inputs the waveform signal to the ultrasonic generator (1.2), which converts the waveform signal into an electrical signal. Step 2: constructing an ultrasonic photovoltaic panel dust removal module (2), wherein the ultrasonic photovoltaic panel dust removal module (2) comprises an ultrasonic transducer (2.1) and a photovoltaic panel (2.2); Step 3: The ultrasonic transducer (2.1) receives the electrical signal generated by the ultrasonic generator (1.2), and the ultrasonic transducer (2.1) generates ultrasonic vibration. The ultrasonic vibration frequency is 20kHz-40kHz or 40kHz-80kHz according to the dust adhesion. The vibration propagates along the surface of the photovoltaic panel, forming a surface wave effect, which effectively shakes off the dust, particulate matter or pollutants attached to the surface of the photovoltaic panel with a large tilt angle.