Cleaning device, solar system and solar system cleaning method

Abstract

The invention discloses a cleaning device, a solar system and a solar system cleaning method.The cleaning device is provided with a support, a thermoacoustic effect generator, a heat conduction unit and a sound wave dust removal unit, the support can fix a solar photovoltaic panel, the thermoacoustic effect generator is arranged on the support, and the heat conduction unit is connected with the thermoacoustic effect generator; according to the solar energy system, heat energy of the solar photovoltaic panel can be guided into the thermoacoustic effect generator, the thermoacoustic effect generator can form sound waves, the sound wave dust removal unit can output the sound waves to the solar photovoltaic panel, and the solar energy system is provided with the above structure; the heat conduction unit guides heat energy of the solar photovoltaic panel into the thermoacoustic effect generator, the thermoacoustic effect generator forms sound waves through the heat energy, the sound wave dust removal unit collects the sound waves and outputs the sound waves to the solar photovoltaic panel, and waterless cleaning of the solar photovoltaic panel is achieved. Therefore, the cleaning of the solar system can be suitable for water-deficient areas.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic equipment, and in particular to a cleaning device, a solar energy system and a solar energy system cleaning method. Background Art

[0002] In the field of photovoltaic power generation, the energy conversion efficiency of solar photovoltaic panels is significantly affected by the cleanliness of their surfaces. Dust and pollutants accumulated on the surface of solar photovoltaic panels can significantly reduce the photoelectric conversion efficiency, thereby affecting the power generation performance and economic benefits of the entire photovoltaic system. In the prior art, the cleaning methods of solar photovoltaic panels mainly include manual cleaning and automatic cleaning. Manual cleaning methods are labor-intensive, have a long cleaning cycle, are costly, and can cause certain physical damage to solar photovoltaic panels.

[0003] Although the automatic cleaning system can effectively reduce labor costs and cleaning frequency, the current general cleaning method is a solar photovoltaic panel cleaning device with a publication number of CN219812120U. The cleaning device includes a moving frame, a scraper and a sponge pad are bonded to the bottom end of the moving frame, the moving frame can be slidably connected to the solar photovoltaic panel through a slide, a water tank is fixedly installed on the upper end surface of the moving frame, and spray boxes with nozzles are fixedly installed on both sides of the water tank. During the movement of the moving frame, the dirt on the surface of the solar photovoltaic panel can be removed by spraying of the nozzle and wiping of the scraper and sponge pad to the solar photovoltaic panel, thereby improving the power generation efficiency of the solar photovoltaic panel.

[0004] Although cleaning devices can facilitate the removal of dirt on the surface of solar photovoltaic panels, they rely on water resources and have high energy consumption. Solar photovoltaic panels are mostly used in water-scarce areas such as the northwest, which has obvious limitations for their application in water-scarce areas. Therefore, exploring a cleaning technology that does not require an external water source and does not require cleaning of solar photovoltaic panels has become an important research direction in the photovoltaic industry. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a cleaning device, a solar energy system and a solar energy system cleaning method to solve the technical problem that the solar photovoltaic panel cleaning device in the prior art consumes a large amount of water and is difficult to apply to water-scarce areas.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a cleaning device, comprising: A bracket for fixing a solar photovoltaic panel; A thermoacoustic effect generator, mounted on the bracket, for generating sound waves through thermal energy; a heat conduction unit connected to the thermoacoustic effect generator and used for conducting heat energy of the solar photovoltaic panel into the thermoacoustic effect generator so that the thermoacoustic effect generator forms sound waves; and The acoustic wave dust removal unit is connected to the thermoacoustic effect generator and is used to collect the acoustic waves of the thermoacoustic effect generator and output the acoustic waves toward the solar photovoltaic panel to clean the solar photovoltaic panel.

[0007] In some embodiments, the thermoacoustic effect generator includes a pipe body and a sonic wave pipe network, wherein the sonic wave pipe network is installed inside the pipe body and connected to the heat conduction unit, and is used to form sound waves in the pipe body through the heat supply of the heat conduction unit, and the sonic wave dust removal unit is connected to the sonic wave outlet of the pipe body.

[0008] In some embodiments, the acoustic wave pipe network is provided with an external pipe network inlet and an external pipe network outlet, and the heat transfer unit includes a hot working fluid pipe and a cold working fluid pipe, one end of the hot working fluid pipe and the cold working fluid pipe are respectively connected to the external pipe network inlet and the external pipe network outlet, and the hot working fluid pipe and the cold working fluid pipe are used to connect solar photovoltaic panels.

[0009] In some embodiments, the cleaning device also includes an auxiliary heating module, which includes a temperature sensor, a resistance wire and a controller. The temperature sensor is installed on the pipe body and close to the sonic wave pipe network. The resistance wire is installed on the sonic wave pipe network. The controller is electrically connected to the temperature sensor and the resistance wire, and is used to control the resistance wire according to the temperature measured by the temperature sensor.

[0010] In some embodiments, the sound wave outlet of the tube body is equipped with an electrically controlled valve, and the electrically controlled valve is electrically connected to the controller. The controller is also used to control the opening of the electrically controlled valve according to the temperature measured by the temperature sensor.

[0011] In some embodiments, a heat insulating layer is provided on the surface of the tube body.

[0012] In some embodiments, the air inlet of the tube body is provided with a dustproof net.

[0013] In some embodiments, the ultrasonic dust removal unit includes a ultrasonic pipeline and a ultrasonic nozzle. One end of the ultrasonic pipeline is connected to the ultrasonic outlet of the pipe body for collecting sound waves, and the ultrasonic nozzle is connected to the other end of the ultrasonic pipeline for outputting the sound waves collected by the ultrasonic pipeline toward the solar photovoltaic panel.

[0014] In a second aspect, the present invention further provides a solar energy system, comprising a solar photovoltaic panel and a cleaning device, wherein the cleaning device is installed on the solar photovoltaic panel device and is used to clean the solar photovoltaic panel device.

[0015] In a third aspect, the present invention further provides a solar energy system cleaning method, which is performed by a solar energy system and comprises the following steps: The heat transfer unit conducts the heat energy of the solar photovoltaic panel into the thermoacoustic effect generator; Thermoacoustic effect generators use heat energy to form sound waves; The acoustic wave dust removal unit collects the acoustic waves of the thermoacoustic effect generator and outputs the acoustic waves toward the solar photovoltaic panel.

[0016] Compared with the prior art, the cleaning device, solar energy system and solar energy system cleaning method provided by the present invention, the cleaning device is provided with a bracket, a thermoacoustic effect generator, a heat conduction unit and an acoustic wave dust removal unit, the bracket can fix the solar photovoltaic panel, the thermoacoustic effect generator is installed on the bracket, the heat conduction unit is connected to the thermoacoustic effect generator, and the thermal energy of the solar photovoltaic panel can be introduced into the thermoacoustic effect generator so that the thermoacoustic effect generator forms a sound wave, and the acoustic wave dust removal unit can output the sound wave toward the solar photovoltaic panel. The solar energy system is provided with the above structure, when cleaning the solar photovoltaic panel, the heat conduction unit introduces the thermal energy of the solar photovoltaic panel into the thermoacoustic effect generator, the thermoacoustic effect generator forms a sound wave through the thermal energy, the acoustic wave dust removal unit collects the sound wave and outputs the sound wave toward the solar photovoltaic panel, the solar photovoltaic panel is automatically cleaned, and the waterless cleaning of the solar photovoltaic panel is realized, so that the cleaning of the solar energy system can be suitable for water-scarce areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a solar energy system provided by an embodiment of the present invention from a first perspective; Figure 2 is a structural schematic diagram of a solar energy system provided by an embodiment of the present invention from a second viewing angle; Figure 3 is a schematic structural diagram of a solar energy system provided by an embodiment of the present invention from a third viewing angle; Figure 4 is a schematic structural diagram of a thermoacoustic effect generator of a cleaning device provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the internal structure of the thermoacoustic effect generator of the cleaning device provided by an embodiment of the present invention; Figure 6 is a top view of a thermoacoustic effect generator of a cleaning device provided by an embodiment of the present invention; Figure 7 is along Figure 4 Sectional view along line AA Figure 8 The figure is a flow chart of a solar energy system cleaning method provided by an embodiment of the present invention.

[0018] Reference numerals in the figures: 10—bracket 20—thermoacoustic effect generator 21—tube body 22—sound wave pipe network 30—heat transfer unit 31—thermal medium pipe 32—cooling medium pipe 40—sonic wave dust removal unit 41—sonic wave pipeline 42—sonic nozzle 50—auxiliary heating module 51—temperature sensor 52—resistance wire 53—controller 60—control unit 70 - Monitoring unit 71 - Temperature sensor 72 - Humidity sensor 73 - Ambient light sensor 74 - Dust sensor 80 - Solar photovoltaic panel 90—power module 211—sound wave outlet 212—air inlet 213—Insulation layer 221—Pipeline network external inlet 222—Pipeline network external outlet 2111—Electronic control valve 2121—Dust screen. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that the solar photovoltaic panel 80 cleaning device in the prior art consumes a large amount of water and is difficult to apply to water-scarce areas, the present invention provides a cleaning device, a solar energy system and a solar energy system cleaning method, which can achieve waterless cleaning of the solar photovoltaic panel 80, so that the solar energy system can achieve automatic cleaning in water-scarce areas.

[0021] In order to achieve the above technical objectives, an embodiment of the present invention provides a cleaning device, such as Figure 1-3 As shown, it includes a bracket 10, a thermoacoustic effect generator 20, a heat conduction unit 30 and an acoustic wave dust removal unit 40, the bracket 10 is used to fix the solar photovoltaic panel 80; the thermoacoustic effect generator 20 is installed on the bracket 10, and is used to form sound waves through thermal energy; the heat conduction unit 30 is connected to the thermoacoustic effect generator 20, and is used to introduce the thermal energy of the solar photovoltaic panel 80 into the thermoacoustic effect generator 20, so that the thermoacoustic effect generator 20 forms sound waves; the acoustic wave dust removal unit 40 is connected to the thermoacoustic effect generator 20, and is used to collect the sound waves of the thermoacoustic effect generator 20, and output the sound waves toward the solar photovoltaic panel 80, so as to clean the solar photovoltaic panel 80.

[0022] Specifically, the cleaning device is provided with a bracket 10, a thermoacoustic effect generator 20, a heat conduction unit 30 and an acoustic wave dust removal unit 40. The bracket 10 can fix the solar photovoltaic panel 80, the thermoacoustic effect generator 20 is installed on the bracket 10, and the heat conduction unit 30 is connected to the thermoacoustic effect generator 20. The thermal energy of the solar photovoltaic panel 80 can be introduced into the thermoacoustic effect generator 20 so that the thermoacoustic effect generator 20 forms a sound wave. The acoustic wave dust removal unit 40 can output the sound wave toward the solar photovoltaic panel 80. By providing the above structure, when the solar energy system cleans the solar photovoltaic panel 80, the heat conduction unit 30 introduces the thermal energy of the solar photovoltaic panel 80 into the thermoacoustic effect generator 20, and the thermoacoustic effect generator 20 forms a sound wave through the thermal energy. The acoustic wave dust removal unit 40 collects the sound wave and outputs the sound wave toward the solar photovoltaic panel 80, so as to automatically clean the solar photovoltaic panel 80, thereby realizing waterless cleaning of the solar photovoltaic panel 80 by utilizing the heat generated by the solar photovoltaic panel, so that the cleaning of the solar energy system can be suitable for water-scarce areas.

[0023] In one embodiment, if Figure 1-7 As shown, the thermoacoustic effect generator 20 includes a pipe body 21 and a sonic wave pipe network 22. The sonic wave pipe network 22 is installed inside the pipe body 21 and connected to the heat conduction unit 30. It is used to form sound waves in the pipe body 21 through the heat supply of the heat conduction unit 30. The sonic wave dust removal unit 40 is connected to the sonic wave outlet 211 of the pipe body 21.

[0024] Specifically, the sonic pipe network 22 is connected with the heat transfer unit 30, and can be heated by the heat energy introduced from the solar photovoltaic panel 80, so that the air masses around the sonic pipe network 22 absorb heat and expand, and the internal pressure of the pipe body 21 tends to oscillate. The air flows into the pipe body 21 through the air inlet at the bottom of the pipe body 21 due to the heat inside the pipe, and the air masses and alternating density blocks in the pipe body 21 are forcibly transported away by the hot air flow to make way for the heat storage area. At this time, the speed of the small air mass is the superposition of the vibration speed and the air flow speed. Therefore, the displacement distance of the air mass increases in a wave-like manner with time, so that the small air mass has more time to absorb heat in the high-pressure area near the sonic pipe network 22, so that the vibration energy can be maintained. Therefore, with the help of the incoming hot air flow, the adjacent blocks can change their density and vibrate to make sound.

[0025] The frequency of the emitted sound wave can be calculated according to the following formula:

[0026] in is the sound frequency; is the specific heat ratio of air, which is generally 1.4; is the gas constant of air, which is 287; is the Kelvin temperature of the metal pipe network; is the length of the tube body 21; Since the specific heat ratio of air, the gas constant of air and the length of the tube body 21 are all constant values, the frequency of the sound waves generated by the tube body 21 can be adjusted by simply adjusting the temperature of the sound wave tube network 22 .

[0027] In this embodiment, the tube body 21 is a tube body 21, such as Figure 1-7 As shown, the upper portion of the tube body 21 is a sound wave outlet 211 for conducting sound waves and hot air, and the lower portion of the tube body 21 is an air inlet 212 for allowing air to enter the tube body 21 .

[0028] In one embodiment, if Figure 1-7 As shown, the surface of the tube body 21 is provided with a heat insulation layer 213. Specifically, the heat insulation layer 213 can insulate the inside of the tube body 21, reduce the influence of the external environment on the thermoacoustic effect generator 20, and improve the thermoacoustic effect of the thermoacoustic effect generator 20.

[0029] In one embodiment, the heat insulation layer 213 is wrapped around the tube body 21 , and the heat insulation layer 213 is one of phenolic resin, foam glass, fluorine-containing polyurethane, or polystyrene material, and the fluorine-containing polyurethane material.

[0030] Specifically, fluorinated polyurethane has excellent weather resistance and is more resistant to ultraviolet rays than other thermal insulation materials. It can better maintain its physical properties when used outdoors, slow down the aging process caused by light, and has excellent chemical stability. It can resist corrosion from a wider variety of chemical substances and is suitable for thermal insulation scenarios with harsh chemical environments. At the same time, fluorinated polyurethane has low surface energy, and the surface of the material is not easy to absorb dust and other dirt, maintaining good cleanliness. It also reduces the possibility of the insulation layer being affected by dirt accumulation and affecting the insulation effect. Fluorinated polyurethane is also hydrophobic, more hydrophobic than other thermal insulation materials, and can maintain thermal insulation properties in a humid environment, reducing the impact of water vapor penetration on the insulation effect.

[0031] In one embodiment, the thickness of the thermal insulation layer 213 is 1.5-3 cm, preferably 2 cm.

[0032] In one embodiment, if Figure 3-5 As shown in FIG. 7 , the air inlet 212 of the tube body 21 is provided with a dustproof net 2121. The dustproof net 2121 can prevent external sand and dust from entering the tube body 21 without hindering the normal circulation of air.

[0033] In one embodiment, the dustproof net 2121 is a polyethylene dustproof net 2121.

[0034] In this embodiment, the sonic tube network 22 is in a spider web shape.

[0035] It can be understood that the heat conducting unit 30 can be any heat conducting structure such as a heat conducting wire that can conduct the heat of the solar photovoltaic panel 80 to the acoustic wave pipe network 22 .

[0036] In one embodiment, if Figure 1-7 As shown, the acoustic wave pipe network 22 is provided with a pipe network external inlet 221 and a pipe network external outlet 222, and the heat transfer unit 30 includes a hot working fluid pipe 31 and a cold working fluid pipe 32, one end of the hot working fluid pipe 31 and the cold working fluid pipe 32 are respectively connected to the pipe network external inlet 221 and the pipe network external outlet 222, and the hot working fluid pipe 31 and the cold working fluid pipe 32 are used to connect the solar photovoltaic panel 80. Specifically, the hot working fluid pipe 31 and the cold working fluid pipe 32 are filled with liquid working fluid. Through the above arrangement, the liquid working fluid heated by the solar photovoltaic panel 80 enters the hot working fluid pipe 31, and flows into the acoustic wave pipe network 22 from the external inlet 221 of the pipe network connected to the hot working fluid pipe 31. After the liquid working fluid exchanges heat with the air inside the pipe body 21 in the acoustic wave pipe network 22, it flows out to the cold working fluid pipe 32 through the external outlet 222 of the pipe network; the cold working fluid pipe 32 is circulated again after the solar photovoltaic panel 80, thereby realizing the continuous introduction of heat from the solar photovoltaic panel 80 into the acoustic wave pipe network 22.

[0037] In this embodiment, Figure 1-3 As shown, the number of thermoacoustic effect generators 20 is 4, the hot working fluid pipe 31 includes a hot working fluid main pipeline and 4 hot working fluid branch pipelines, the cold working fluid pipe 32 includes a cold working fluid main pipeline and 4 cold working fluid branch pipelines, the hot working fluid main pipeline is connected to the solar photovoltaic panel 80, one end of each hot working fluid branch pipeline is connected to the hot working fluid main pipeline, and the other end of each hot working fluid branch pipeline is respectively connected to the pipeline external inlet 221 of each acoustic wave pipeline network 22, the cold working fluid main pipeline is connected to the solar photovoltaic panel 80, one end of each cold working fluid branch pipeline is connected to the cold working fluid main pipeline, and the other end of each cold working fluid branch pipeline is respectively connected to the pipeline external outlet 222 of each acoustic wave pipeline network 22. After being heated by the solar photovoltaic panel 80, the liquid working fluid enters each hot working fluid branch pipeline through the hot working fluid main pipeline, and then enters each ultrasonic pipe network 22 from each hot working fluid branch pipeline. After releasing heat from each ultrasonic pipe network 22, it enters each cold working fluid branch pipeline, and finally converges into the cold working fluid main pipeline, and enters the solar photovoltaic panel 80 from the cold working fluid main pipeline.

[0038] In this embodiment, the liquid working fluid is one or more of alcohol, heat transfer fluid, and refrigerant; the filling amount of the liquid working fluid is close to and slightly smaller than the total volume of the hot working fluid tube 31 and the cold working fluid tube 32 to ensure effective heat exchange and prevent the liquid working fluid from over-expanding or generating bubbles in the hot working fluid tube 31 and the cold working fluid tube 32.

[0039] It is understandable that the number of the ultrasonic dust removal units 40 can be increased or decreased according to actual needs; the actual need is that the number of ultrasonic dust removal units 40 should enable the sound waves to cover the entire surface of the solar photovoltaic panel 80 to ensure that dust in all areas of the solar photovoltaic panel 80 can be effectively removed.

[0040] In one embodiment, if Figure 1-3 As shown, the sonic dust removal unit 40 includes a sonic pipe 41 and a sonic nozzle 42, one end of the sonic pipe 41 is connected to the sonic outlet 211 of the pipe body 21 for collecting sonic waves, and the sonic nozzle 42 is connected to the other end of the sonic pipe 41 for outputting the sonic waves collected by the sonic pipe 41 toward the solar photovoltaic panel 80. Specifically, the sonic waves formed by the pipe body 21 are propagated through the sonic pipe 41, and then amplified and ejected through the sonic nozzle 42, and finally the solar photovoltaic panel 80 is cleaned.

[0041] like Figure 1-3 As shown, the acoustic wave nozzle 42 is a trumpet-shaped acoustic wave nozzle 42; the oblique angle of the acoustic wave nozzle 42 to the solar photovoltaic panel 80 is 25-45 degrees. Preferably, the oblique angle of the acoustic wave nozzle 42 to the solar photovoltaic panel 80 is 30 degrees.

[0042] In this embodiment, Figure 3 As shown, the cleaning device also includes a power module 90, which is electrically connected to the solar photovoltaic panel 80 and can store the electrical energy generated by the solar photovoltaic panel 80. Other electronic components of the cleaning device are connected to the power module 90 and can be powered by the power module 90.

[0043] In one embodiment, if Figure 4-7 As shown, the cleaning device further includes an auxiliary heating module 50, which includes a temperature sensor 51, a resistance wire 52 and a controller 53. The temperature sensor 51 is installed on the pipe body 21 and close to the sonic wave pipe network 22, the resistance wire 52 is installed on the sonic wave pipe network 22, and the controller 53 is electrically connected to the temperature sensor 51 and the resistance wire 52, and is used to control the resistance wire 52 according to the temperature measured by the temperature sensor 51. Specifically, when the temperature sensor 51 senses that the temperature of the sonic wave pipe network 22 is low, so that it is difficult to form a sonic wave inside the pipe body 21, the controller 53 controls the power module 90 to energize the resistance wire 52 to heat the sonic wave pipe network 22, thereby providing the sonic wave pipe network 22 with the temperature required to form a sonic wave, so as to avoid the sonic wave pipe network 22 being difficult to effectively form a sonic wave in the pipe body 21 under long-term low temperatures in winter, so that the solar photovoltaic panel 80 can also be cleaned under low temperature conditions in winter.

[0044] In one embodiment, if Figure 1-7As shown, the sound wave outlet 211 of the tube body 21 is equipped with an electric control valve 2111, and the electric control valve 2111 is electrically connected to the controller 53. The controller 53 is also used to control the opening of the electric control valve 2111 according to the temperature measured by the temperature sensor 51. Specifically, the controller 53 can control the frequency and wavelength of the sound waves from the air outlet end of the tube body 21 by controlling the opening of the electric control valve 2111, so that different frequencies and wavelengths can be adjusted for cleaning according to different particle sizes. With respect to large-sized dust, low-frequency sound waves are mainly used for cleaning, and with respect to small-sized dust, high-frequency sound waves are mainly used for cleaning.

[0045] In one embodiment, if Figure 1 As shown, the cleaning device further includes a control unit 60 and a monitoring unit 70, wherein the monitoring unit 70 includes a temperature sensor 71, a humidity sensor 72, an ambient light sensor 73, and a dust sensor 74; the control unit 60 is electrically connected to the temperature sensor 71, the humidity sensor 72, the ambient light sensor 73, and the dust sensor 74; the temperature sensor 71, the humidity sensor 72, and the ambient light sensor 73 are used to monitor the environmental conditions of the temperature, humidity, and sunshine intensity of the solar photovoltaic panel 80 in real time; and the dust sensor 74 is used to detect the degree of dust accumulation on the surface of the solar photovoltaic panel 80. The control unit 60 automatically adjusts the operating state of the thermoacoustic effect generator 20 by controlling the thermoacoustic effect generator 20, the resistance wire 52, and the electric control valve 2111 according to the environmental conditions of the temperature, humidity, and sunshine intensity of the solar photovoltaic panel 80 and the degree of dust accumulation on the surface of the solar photovoltaic panel 80.

[0046] When the ambient temperature ranges from -10°C to 50°C, the sunshine intensity is not less than 200 W / m², and the humidity ranges from 20% to 80%, when the dust sensor 74 detects that the dust density on the solar photovoltaic panel 80 reaches 0.3 g / m², the cleaning device will start the cleaning program. At this time, the control unit 60 controls the electric control valve 2111 on the thermoacoustic effect generator 20 to be in an open state, the dust sensor 74 will detect the dust particle size and physical properties, and the control unit 60 will adjust the thermoacoustic effect generator 20 to generate a sound wave frequency and sound duration within an applicable range according to the detection data.

[0047] The principle that the control unit 60 selects the sound wave frequency according to the dust particle size is that the dust particle size is different, and the response frequency to the sound wave is different. Dust particles with large particle size are more likely to respond better to low-frequency sound waves, because low-frequency sound waves have longer wavelengths, which can more easily bypass small particles and interact with large particles, resulting in more obvious sound scattering. High-frequency sound waves have shorter wavelengths, which can more easily bypass large particles, so the interaction with large particles is relatively weak. Therefore, for large particles of dust, it responds better to low-frequency sound waves. Dust particles with small particle size are more likely to respond better to high-frequency sound waves. High-frequency sound waves have shorter wavelengths, which can more easily interact with small particles, resulting in more obvious sound scattering. Low-frequency sound waves have longer wavelengths, which can more easily bypass small particles, so the interaction with small particles is relatively weak. Therefore, for small particles of dust, it responds better to high-frequency sound waves.

[0048] The relationship between the particle size of dust particles and the sound wave response frequency can be described by the sound scattering theory, which is expressed as follows:

[0049] in, is the particle size, is the speed of sound in air, is the frequency of the sound wave. This formula shows that the particle size is inversely proportional to the frequency of the sound wave, that is, the higher the frequency, the smaller the particle size, and vice versa.

[0050] When the dust sensor 74 detects that the dust density on the surface of the solar photovoltaic panel 80 is lower than 0.05 g / m², the control unit 60 will shut down the thermoacoustic effect generator 20 by closing the electric control valve 2111 on the tube body 21, thereby shutting down the cleaning program to ensure effective cleaning without excessive energy consumption.

[0051] The embodiment of the present invention also provides a solar energy system, such as Figure 1-3 As shown, it includes a solar photovoltaic panel 80 and a cleaning device. The cleaning device is installed on the solar photovoltaic panel 80 and is used to clean the solar photovoltaic panel 80.

[0052] Specifically, by setting the above-mentioned structure, when the solar energy system cleans the solar photovoltaic panel 80, the heat transfer unit 30 conducts the heat energy of the solar photovoltaic panel 80 to the thermoacoustic effect generator 20, and the thermoacoustic effect generator 20 forms sound waves through the heat energy, so that the acoustic wave dust removal unit 40 collects the sound waves and outputs the sound waves toward the solar photovoltaic panel 80, so as to automatically clean the solar photovoltaic panel 80 and realize waterless cleaning of the solar photovoltaic panel 80, thereby making the cleaning of the solar energy system suitable for water-scarce areas.

[0053] In this embodiment, the power of the solar photovoltaic panel 80 is 300W; the size of the solar photovoltaic panel 801 is 1960mm×990mm×50mm (length*width*height).

[0054] In this embodiment, two acoustic wave dust removal units 40 are equidistantly installed on both wide sides of the solar photovoltaic panel 80 ; and four acoustic wave dust removal units 40 are equidistantly installed on one long side of the solar photovoltaic panel 80 .

[0055] The embodiment of the present invention also provides a solar energy system cleaning method, which is performed by the solar energy system, such as Figure 8 As shown, the following steps are included: The heat transfer unit 30 transfers the heat energy of the solar photovoltaic panel 80 to the thermoacoustic effect generator 20; The thermoacoustic effect generator 20 forms sound waves through thermal energy; The acoustic wave dust removal unit 40 collects the acoustic waves of the thermoacoustic effect generator 20 and outputs the acoustic waves toward the solar photovoltaic panel 80 .

[0056] Specifically, the solar energy system can realize waterless automatic cleaning of the solar photovoltaic panel 80 by executing the above cleaning steps, so that the cleaning of the solar energy system can be suitable for water-scarce areas.

[0057] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cleaning device, characterized in that: include: A bracket for fixing a solar photovoltaic panel; A thermoacoustic effect generator, mounted on the bracket, for generating sound waves through thermal energy; A heat conduction unit connected to the thermoacoustic effect generator and used for conducting the heat energy of the solar photovoltaic panel into the thermoacoustic effect generator so that the thermoacoustic effect generator forms an acoustic wave; and The acoustic wave dust removal unit is connected to the thermoacoustic effect generator and is used to collect the acoustic waves of the thermoacoustic effect generator and output the acoustic waves toward the solar photovoltaic panel to clean the solar photovoltaic panel.

2. The cleaning device according to claim 1, characterized in that The thermoacoustic effect generator includes a pipe body and a sonic wave pipe network. The sonic wave pipe network is installed inside the pipe body and connected to the heat conduction unit, and is used to form sound waves in the pipe body through the heat supply of the heat conduction unit. The sonic wave dust removal unit is connected to the sonic wave outlet of the pipe body.

3. The cleaning device according to claim 2, characterized in that: The sonic wave pipe network is provided with a pipe network external inlet and a pipe network external outlet, and the heat conduction unit includes a hot working fluid pipe and a cold working fluid pipe, one end of the hot working fluid pipe and the cold working fluid pipe are respectively connected to the pipe network external inlet and the pipe network external outlet, and the hot working fluid pipe and the cold working fluid pipe are used to connect the solar photovoltaic panel.

4. The cleaning device according to claim 2, characterized in that: The cleaning device also includes an auxiliary heating module, which includes a temperature sensor, a resistance wire and a controller. The temperature sensor is installed on the pipe body and close to the sonic wave pipe network. The resistance wire is installed on the sonic wave pipe network. The controller is electrically connected to the temperature sensor and the resistance wire, and is used to control the resistance wire according to the temperature measured by the temperature sensor.

5. The cleaning device according to claim 4, characterized in that: The sound wave outlet of the tube body is equipped with an electric control valve, and the electric control valve is electrically connected to the controller. The controller is also used to control the opening of the electric control valve according to the temperature measured by the temperature sensor.

6. The cleaning device according to claim 2, characterized in that: The surface of the pipe body is provided with a heat insulation layer.

7. The cleaning device according to claim 2, characterized in that: The air inlet of the tube body is provided with a dustproof net.

8. The cleaning device according to claim 2, characterized in that: The sonic dust removal unit comprises a sonic pipeline and a sonic nozzle, wherein one end of the sonic pipeline is connected to the sonic outlet of the pipe body for collecting sonic waves, and the sonic nozzle is connected to the other end of the sonic pipeline for outputting the sonic waves collected by the sonic pipeline toward the solar photovoltaic panel.

9. A solar energy system, characterized in that: It comprises a solar photovoltaic panel and the cleaning device according to any one of claims 1 to 8, wherein the cleaning device is installed on the solar photovoltaic panel device and is used to clean the solar photovoltaic panel device.

10. A method for cleaning a solar energy system, characterized in that: The solar energy system of claim 9 comprises the following steps: The heat transfer unit conducts the heat energy of the solar photovoltaic panel to the thermoacoustic effect generator; Thermoacoustic effect generators use heat energy to form sound waves; The acoustic wave dust removal unit collects the acoustic waves of the thermoacoustic effect generator and outputs the acoustic waves toward the solar photovoltaic panel.

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