Self-defrosting and deicing solar photovoltaic panel and system

Abstract

The present invention relates to a self-defrosting and de-icing solar photovoltaic panel and system, comprising a solar photovoltaic panel body and a frame, the surface of the light-transmitting surface of the solar photovoltaic panel body is covered with a protective film, a liquid medium containing cavity is arranged between the protective film and the light-transmitting surface of the solar photovoltaic panel body, the liquid medium containing cavity is filled with antifreeze, and mounting grooves are arranged at the left and right ends of the frame, and a high-frequency vibrator is arranged inside the mounting groove for applying high-frequency vibration to the protective film and the antifreeze in the liquid medium containing cavity. The present invention covers the surface of the solar photovoltaic panel body with a protective film, uses antifreeze as a vibration transmission medium, and applies high-frequency vibration to the protective film and the antifreeze in the liquid medium containing cavity through a high-frequency vibrator, thereby causing the ice layer at the bottom of the snow layer on the surface of the protective film to crack, fall off, and fall off, and the snow will melt faster, with a good snow removal effect.

Description

Technical Field

[0001] The invention relates to a self-defrosting and deicing solar photovoltaic panel and system, belonging to the technical field of solar photovoltaic. Background Art

[0002] Solar photovoltaic system refers to the facilities that use the photovoltaic effect of photovoltaic semiconductor materials to convert solar energy into direct current electricity. The core of photovoltaic facilities is solar panels / solar photovoltaic panels. The semiconductor materials used for power generation are mainly: monocrystalline silicon, polycrystalline silicon, amorphous silicon and cadmium telluride.

[0003] Current solar photovoltaic panels usually include tempered glass (which is used to protect the power generation body, such as solar cells), EVA (used to bond and fix the tempered glass and the power generation body), the power generation body (such as crystalline silicon solar cells, thin-film solar cells), and a backplane.

[0004] There is a problem with current solar photovoltaic panels. If there is snow on the surface of the solar photovoltaic panels in the snowy days of winter, it usually takes 1 to 10 days for the snow to melt completely because the solar photovoltaic panels are usually installed on roofs and other places that are not easy to clean. The snow layer is white and opaque, and the sunlight cannot penetrate the snow to reach the solar panels, resulting in a decrease in the light absorption rate of the solar panels, reducing the power generation or even stopping the power generation. Therefore, for areas with severe winters and sufficient sunshine, once it snows, photovoltaic power generation will be delayed for several days.

[0005] Based on this, the present invention is proposed. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a self-defrosting and deicing solar photovoltaic panel and system. The specific technical solution is as follows:

[0007] A self-defrosting and de-icing solar photovoltaic panel comprises a solar photovoltaic panel body and a frame installed on the periphery of the solar photovoltaic panel body, wherein the light-transmitting surface of the solar photovoltaic panel body is covered with a protective film, a liquid medium containing cavity is arranged between the protective film and the light-transmitting surface of the solar photovoltaic panel body, the liquid medium containing cavity is filled with antifreeze liquid, the protective film is sealed around the periphery with the frame by adhesive bonding, and mounting grooves are respectively arranged at the left and right ends of the frame, and a high-frequency oscillator is arranged inside the mounting groove for applying high-frequency vibration to the protective film and the antifreeze liquid inside the liquid medium containing cavity.

[0008] As a further improvement, a plurality of first silicone columns are arranged between the protective film and the light-transmitting surface of the solar photovoltaic panel body, and the first silicone columns are fixedly connected to the light-transmitting surface of the solar photovoltaic panel body.

[0009] As a further improvement, a metal mesh plate for supporting the high-frequency vibrator is further provided inside the installation groove, and a supporting portion is provided at the bottom of the metal mesh plate.

[0010] A further improvement is that the end of the protective film is located inside the mounting groove, the side of the mounting groove adjacent to the solar photovoltaic panel body is the main side, a plurality of second silicone columns are arranged between the end of the protective film and the main side, the second silicone columns are fixedly connected to the main side; the end of the protective film is fixedly connected to one end of the metal mesh.

[0011] As a further improvement, a slot cover is provided at the slot opening of the mounting slot, and the slot cover and the slot opening of the mounting slot are sealed by gluing, an antifreeze storage chamber is formed between the slot cover and the mounting slot, and the inside of the antifreeze storage chamber is also filled with antifreeze, and the liquid level of the antifreeze in the antifreeze storage chamber is flush with the middle surface of the protective film.

[0012] As a further improvement, a serrated portion with a rectangular wave-like structure is provided on the top of the main side portion, and the liquid medium accommodating chamber, the gap at the serrated portion, the gap between the end of the protective film and the main side portion, and the antifreeze liquid storage chamber are interconnected.

[0013] As a further improvement, the first high-frequency vibrator is an ultrasonic vibrator, and the second high-frequency vibrator is a megasonic vibrator. The ultrasonic frequency of the ultrasonic vibrator is f1, and the megasonic frequency of the megasonic vibrator is f2, and f2 / f1=52 or 38.

[0014] Further improvement, f1 = 30kHz, f2 = 1.56MHz;

[0015] or,

[0016] f1=25kHz, f2=0.95MHz.

[0017] As a further improvement, the protective film is a biaxially stretched polyester film, and a rectangular spiral thickened area is provided in the middle area of ​​the biaxially stretched polyester film, and the thickened area completely covers the light-transmitting surface of the solar photovoltaic panel body.

[0018] As a further improvement, the self-defrosting and deicing solar photovoltaic panel system also includes a local weather real-time collection module for collecting real-time weather information from the local meteorological station, a weather intelligence analysis and planning module, a control module, and a temperature sensor for measuring the surface temperature of the protective film.

[0019] The local weather real-time collection module collects intelligence information on snowy days, and the weather intelligence analysis and planning module formulates a snow removal plan;

[0020] During the snow removal plan, when the temperature measured by the temperature sensor is less than the temperature threshold, the high-frequency oscillator operates intermittently.

[0021] Beneficial effects of the present invention:

[0022] 1. The self-defrosting and de-icing solar photovoltaic panel and system of the present invention covers the surface of the existing solar photovoltaic panel body with a protective film, uses antifreeze as a vibration transmission medium, and applies high-frequency vibration to the protective film and the antifreeze in the liquid medium accommodating cavity through a high-frequency vibrator, thereby causing the ice layer at the bottom of the snow layer on the surface of the protective film to crack, fall off, and drop, accelerating the melting of the snow, and achieving a good snow removal effect. Compared with the existing electric heating snow removal method, the present invention has low energy consumption and is more energy-saving and environmentally friendly.

[0023] 2. The present invention is particularly suitable for areas with severe winter cold and sufficient sunshine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the self-defrosting and deicing solar photovoltaic panel of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection between the solar photovoltaic panel body and the frame of the present invention;

[0026] Figure 3 is a schematic diagram of the interior of the frame of the present invention;

[0027] Figure 4 It is a schematic diagram of the surface of the protective film of the present invention;

[0028] Figure 5 It is the trend graph of f2 and the corresponding snow removal rate in group D1;

[0029] Figure 6 This is a trend chart of f2 and the corresponding snow removal rate in group D2. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1

[0034] like Figure 2 As shown, the self-defrosting and deicing solar photovoltaic panel includes a solar photovoltaic panel body 10 and a frame 20 installed on the periphery of the solar photovoltaic panel body 10 .

[0035] like Figures 1 to 3 As shown, the light-transmitting surface of the solar photovoltaic panel body 10 is covered with a protective film 30, a liquid medium holding chamber 12 is provided between the protective film 30 and the light-transmitting surface of the solar photovoltaic panel body 10, the liquid medium holding chamber 12 is filled with antifreeze, the protective film 30 is sealed around the frame 20 by adhesive bonding, and the left and right ends of the frame 20 are respectively provided with mounting grooves 21, and a high-frequency oscillator is provided inside the mounting groove 21 for applying high-frequency vibration to the protective film 30 and the antifreeze in the liquid medium holding chamber 12.

[0036] The light-transmitting surface of the solar photovoltaic panel body 10 refers to the tempered glass covering the surface of the cells in the solar photovoltaic panel body 10 .

[0037] To facilitate maintenance and replacement, the periphery of the protective film 30 and the frame 20 are sealed with hot melt adhesive.

[0038] Compared with ice, snow accumulation will prevent sunlight from penetrating to the solar panels, so the main thing is to remove the snow; although frost will also prevent sunlight from penetrating to the solar panels, it is usually only temporary and the frost will generally dissipate after a few hours.

[0039] As for the snow, the bottom of the snow layer is an ice layer, and the thickness of the ice layer is generally less than half of the snow layer. Due to the presence of snowflakes when it snows, the snow layer is usually a porous structure. Compared with the pure ice layer (compact structure), in the present invention, high-frequency vibrations are applied to the protective film 30 and the antifreeze liquid inside the liquid medium holding chamber 12 by a high-frequency oscillator, so that high-frequency vibrations can be applied to the snow layer on the protective film 30, thereby causing the snow layer to crack, fall off, and fall, and the snow will melt faster. In addition, the solar photovoltaic panel body 10 is generally set at an angle. The longer the continuous high-frequency vibration time, the more heat it generates. Sometimes it can even increase the temperature of the antifreeze liquid by 5 to 10°C, which is conducive to melting the ice layer.

[0040] In order to prevent the liquid from being in a low temperature environment below 0°C, antifreeze is used. The antifreeze can be ethanol-water antifreeze, glycerin-water antifreeze or ethylene glycol-water antifreeze.

[0041] If the antifreeze is pure water, in a low temperature environment below 0°C, after the pure water freezes, it will not be able to effectively transmit high-frequency vibrations.

[0042] Example 2

[0043] In Example 1, the self-defrosting and deicing solar photovoltaic panel system includes a local weather real-time collection module for collecting real-time weather information from a local meteorological station, a weather intelligence analysis and planning module, a control module, and a temperature sensor for measuring the surface temperature of the protective film 30;

[0044] The local weather real-time collection module collects intelligence information on snowy days, and the weather intelligence analysis and planning module formulates a snow removal plan;

[0045] During the snow removal plan, when the temperature measured by the temperature sensor is lower than the temperature threshold, the high-frequency vibrator operates intermittently, for example, pausing for 15 minutes after every 1 hour of continuous vibration.

[0046] For example, it is snowing today, and the lowest temperature today is continuously below 0°C. At this time, the snow on the surface of the protective film 30 (the thickness of the snow layer is 3 cm, and the ice layer is about 1.1 to 1.4 cm) needs to be removed; if the temperature does not drop any more, usually the high-frequency oscillator has a cumulative operation time of about 1 hour, and more than 50% of the snow on the surface of the protective film 30 can be removed. The snow on the surface of the protective film 30 will become pieces of snow blocks, and will no longer be connected as a whole. Once the snow blocks attached to the surface of the protective film 30 are detached under the high-frequency vibration, coupled with the solar photovoltaic panel body 1 0 is set at an angle, and a large amount of snow blocks fall off; with the reduction of the ice layer, the fluffy snowflakes are not difficult to melt and be removed; therefore, from the perspective of energy saving, the cumulative operating time of the high-frequency oscillator should be shortened as much as possible; if the snow removal effect on the day is not ideal, the power generation of the solar photovoltaic panel body 10 can be calculated by the light intensity during the day on the next day, and the ratio between it and the expected power generation (that is, the theoretical power generation after the snow is completely removed) can represent the degree of snow removal; if the degree of snow removal on the next day does not meet expectations, the high-frequency oscillator can be started again.

[0047] In addition, even during the snow removal plan, if the temperature measured by the temperature sensor is less than the limit value, the high frequency oscillator will not be activated to protect the protective film 30.

[0048] Example 3

[0049] like Figures 1 to 3 As shown, a plurality of first silicone columns 11 are arranged between the protective film 30 and the light-transmitting surface of the solar photovoltaic panel body 10 , and the first silicone columns 11 are fixedly connected to the light-transmitting surface of the solar photovoltaic panel body 10 .

[0050] The cells in the solar photovoltaic panel body 10 are arranged in an array, and there is a blank gap at the junction of the corners of two adjacent rectangular cells, which are generally connected by filling glue. Therefore, the first silicone column 11 can be glued there to avoid occupying the area of ​​the cell.

[0051] A metal mesh plate 25 for supporting the high-frequency vibrator is further disposed inside the mounting groove 21 , and a supporting portion 251 is disposed at the bottom of the metal mesh plate 25 .

[0052] The metal mesh plate 25 is preferably made of stainless steel, which can provide support for the high-frequency vibrator and enable the high-frequency vibrator to apply vibrations of sufficient intensity to the antifreeze liquid below the metal mesh plate 25 .

[0053] The end of the protective film 30 is located inside the mounting groove 21, and the side of the mounting groove 21 adjacent to the solar photovoltaic panel body 10 is the main side. A plurality of second silicone columns 24 are arranged between the end of the protective film 30 and the main side, and the second silicone columns 24 are fixedly connected to the main side; the end of the protective film 30 is fixedly connected to one end of the metal mesh 25.

[0054] A slot cover 50 is provided at the slot opening of the mounting slot 21, and the slot cover 50 and the slot opening of the mounting slot 21 are sealed by gluing. An antifreeze liquid storage chamber 22 is formed between the slot cover 50 and the mounting slot 21, and the antifreeze liquid storage chamber 22 is also filled with antifreeze liquid. The liquid level of the antifreeze liquid in the antifreeze liquid storage chamber 22 is flush with the middle surface of the protective film 30.

[0055] The middle portion of the protective film 30 refers to the portion covering the light-transmitting surface of the solar photovoltaic panel body 10 .

[0056] A serrated portion 23 with a rectangular wave-like structure is provided on the top of the main side portion, and the liquid medium holding chamber 12, the gap at the serrated portion 23, the gap between the end of the protective film 30 and the main side portion, and the antifreeze liquid storage chamber 22 are interconnected. In this way, the antifreeze liquid storage chamber 22 and the liquid medium holding chamber 12 form a communicating vessel. When the high-frequency oscillator in the antifreeze liquid storage chamber 22 applies high-frequency vibration to the antifreeze liquid in the antifreeze liquid storage chamber 22, it can be transmitted to the liquid medium holding chamber 12 through the antifreeze liquid as a liquid medium.

[0057] The first high-frequency vibrator is an ultrasonic vibrator 26 , and the second high-frequency vibrator is a megasonic vibrator 27 . The ultrasonic frequency of the ultrasonic vibrator 26 is f1 , and the megasonic frequency of the megasonic vibrator 27 is f2 , and f2 / f1 = 52 or 38.

[0058] Snow Removal Characterization Test

[0059] 1. The inclination angle of the solar photovoltaic panel body 10 is 35° (the angle between the panel surface of the solar photovoltaic panel body 10 and the horizontal plane), the thickness of the snow layer is 3 cm, the ice layer is about 1.1-1.4 cm, and the area of ​​the snow layer is 2 m 2 , the environment is a constant temperature cold storage at 0°C. Start the high frequency oscillator and start the snow removal test. After a period of snow removal, observe whether the snow layer on the surface of the protective film 30 falls off; if it does fall off, calculate the total area of ​​the fall off by the grid method, and the snow removal rate = the total area of ​​the fall off / 2.

[0060] 2. After the snow removal test, use a plastic scraper to remove the remaining snow layer on the surface of the protective film 30 within 1 minute, and then wipe the protective film 30 with a rag to observe whether there is a large amount of foam (with an area less than 10mm 2 If there is foam, the total area of ​​foam is calculated by the grid method, and the foam rate = total area of ​​foam / 2.

[0061] If during the high-frequency vibration process, due to ultrasonic cavitation and other reasons, a large amount of foam is easily generated during continuous high-frequency vibration for a long time, and the presence of foam will aggravate the degree of cavitation, aggravate the chronic damage to the protective film 30, thereby affecting the service life of the protective film 30.

[0062] In Example 3, group S1: f1 = 30 kHz, f2 = 1.56 MHz.

[0063] In Example 3, group S2: f1 = 25 kHz, f2 = 0.95 MHz.

[0064] Comparative Example 1

[0065] Group D1: The difference between this group and Example 3 is that in this group, f1=30kHz, f2 varies in the range of 1.2-1.7MHz, and the snow removal time is continuous snow removal for 1h. The corresponding snow removal rate change trend is shown in Figure 5 , as a result, preferably, f1 = 30 kHz, f2 = 1.56 MHz.

[0066] Group D2: The difference between this group and Example 3 is that in this group, f1=25kHz, f2 varies in the range of 0.85-1.75MHz, and the snow removal time is continuous snow removal for 1h. The corresponding snow removal rate change trend is shown in Figure 6 , as a result, preferably, f1 = 25kHz, f2 = 0.95MHz.

[0067] Group D3. The only difference between this group and Example 3 is that in this group, both high-frequency vibrators are ultrasonic vibrators 26, the ultrasonic frequency of the first ultrasonic vibrator 26 is f1, and the ultrasonic frequency of the second ultrasonic vibrator 26 is f3, f1=30kHz, f2=25kHz.

[0068] Group D4. The only difference between this group and Example 3 is that in this group, both high-frequency oscillators are megasonic oscillators 27, the megasonic frequency of the first megasonic oscillator 27 is f2, and the megasonic frequency of the second megasonic oscillator 27 is f4, f2=1.56MHz, f4=0.95MHz.

[0069] Group D5. When conducting the "Snow Removal Characterization Test", this group replaced the snow layer with a pure ice layer of the same specifications and then conducted the test according to the parameters of Group S1. All attributes related to "snow" should be modified to "ice", such as the ice removal rate.

[0070] The results of Group S1, Group S2, and Groups D3 - D5 are shown in Table 1:

[0071] Table 1

[0072]

[0073] In the present invention, only two ultrasonic oscillators are used for ultrasonic vibration. Although the snow removal effect is good, due to the too strong cavitation effect, a large amount of foam is generated, seriously affecting the service life of the protective film 30. If only two megasonic oscillators are used, the snow removal effect is limited. If one ultrasonic oscillator and one megasonic oscillator are superimposed in a special frequency band, not only can a good snow removal effect be ensured, but also the superimposition of megasonic vibration can effectively inhibit the generation of foam; however, this technology only has a good removal effect on the snow layer, and has a limited removal effect on the pure ice layer with a dense and thick structure.

[0074] Example 4

[0075] In Example 3, as Figure 4 shown, the protective film 30 is a biaxially oriented polyester film. A rectangular spiral-shaped thickened area 31 is provided in the middle area of the biaxially oriented polyester film, and the thickened area 31 completely covers the light-transmitting surface of the solar photovoltaic panel body 10. The thickness difference between the thickened area 31 and the non-thickened area is 80 μm.

[0076] The biaxially oriented polyester film has good mechanical properties, high strength, excellent cold and heat resistance, and good water and gas barrier properties. Therefore, it is particularly suitable for the present invention.

[0077] In the application of the present invention, it is found that due to the certain rigidity of the biaxially oriented polyester film itself, after continuous high-frequency vibration for more than 20 h in an environment of -30 °C, the biaxially oriented polyester film in contact with the snow layer will crack. By setting the thickened area 31, its unique rectangular spiral structure can effectively solve this problem.

[0078] Comparative Example 2

[0079] Group F1: Compared with Example 4, the thickened area of this group is in the shape of "ji", and the rest are the same.

[0080] Group F2: Compared with Example 4, the thickened area of this group is grid-shaped, and the rest are the same.

[0081] Group F3: Compared with Example 4, the thickened area of ​​this group is a whole rectangle, there is no non-thickened area in the middle, and the rest are the same.

[0082] Reference example

[0083] Compared with Example 4, this example replaces the biaxially oriented polyester film in Example 4 with a nylon film, and the other parameters are the same.

[0084] 《Test for characterization of low temperature fracture resistance of biaxially oriented polyester film》

[0085] After the biaxially oriented polyester film has been subjected to continuous high-frequency vibration in a cold storage at -30°C for more than 20 hours, the snow layer on the biaxially oriented polyester film is removed with a plastic scraper and then wiped dry with a rag to observe whether there are cracks on the surface of the biaxially oriented polyester film; if there are cracks, the number of cracks is counted.

[0086] The results of Example 4, Group F1 to Group F3, and Reference Example are shown in Table 2:

[0087] Table 2

[0088] Surface cracks of biaxially oriented polyester film Example 4 No cracks Group F1 There are 6 cracks Group F2 There are 11 cracks Group F3 There are 25 cracks Reference example There are 5 cracks

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-defrosting and deicing solar photovoltaic panel, comprising a solar photovoltaic panel body (10) and a frame (20) installed on the periphery of the solar photovoltaic panel body (10), characterized in that: The light-transmitting surface of the solar photovoltaic panel body (10) is covered with a protective film (30), a liquid medium containing chamber (12) is provided between the protective film (30) and the light-transmitting surface of the solar photovoltaic panel body (10), the liquid medium containing chamber (12) is filled with antifreeze liquid, the protective film (30) is sealed with the frame (20) around the periphery by adhesive bonding, the frame (20) is provided with mounting grooves (21) at the left and right ends respectively, and a high-frequency oscillator is provided inside the mounting groove (21) for applying high-frequency vibration to the protective film (30) and the antifreeze liquid inside the liquid medium containing chamber (12).

2. The self-defrosting and deicing solar photovoltaic panel according to claim 1, characterized in that: A plurality of first silicone columns (11) are arranged between the protective film (30) and the light-transmitting surface of the solar photovoltaic panel body (10), and the first silicone columns (11) are fixedly connected to the light-transmitting surface of the solar photovoltaic panel body (10).

3. The self-defrosting and deicing solar photovoltaic panel according to claim 2, characterized in that: A metal mesh plate (25) for supporting the high-frequency vibrator is also provided inside the installation groove (21), and a supporting portion (251) is provided at the bottom of the metal mesh plate (25).

4. The self-defrosting and deicing solar photovoltaic panel according to claim 3, characterized in that: The end of the protective film (30) is located inside the mounting groove (21), and the side of the mounting groove (21) adjacent to the solar photovoltaic panel body (10) is the main side portion. A plurality of second silicone columns (24) are arranged between the end of the protective film (30) and the main side portion, and the second silicone columns (24) are fixedly connected to the main side portion; the end of the protective film (30) is fixedly connected to one end of the metal mesh plate (25).

5. The self-defrosting and deicing solar photovoltaic panel according to claim 4, characterized in that: A slot cover (50) is provided at the slot opening of the installation slot (21), and the slot cover (50) and the slot opening of the installation slot (21) are sealed by gluing. An antifreeze liquid storage chamber (22) is formed between the slot cover (50) and the installation slot (21), and the interior of the antifreeze liquid storage chamber (22) is also filled with antifreeze liquid. The liquid level of the antifreeze liquid in the antifreeze liquid storage chamber (22) is flush with the middle surface of the protective film (30).

6. The self-defrosting and deicing solar photovoltaic panel according to claim 5, characterized in that: A serrated portion (23) with a rectangular wave structure is provided at the top of the main side portion, and the liquid medium accommodating chamber (12), the gap at the serrated portion (23), the gap between the end of the protective film (30) and the main side portion, and the antifreeze liquid storage chamber (22) are interconnected.

7. The self-defrosting and deicing solar photovoltaic panel according to claim 1, characterized in that: The first high-frequency vibrator is an ultrasonic vibrator (26), and the second high-frequency vibrator is a megasonic vibrator (27). The ultrasonic frequency of the ultrasonic vibrator (26) is f1, and the megasonic frequency of the megasonic vibrator (27) is f2, and f2 / f1=52 or 38.

8. The self-defrosting and deicing solar photovoltaic panel according to claim 7, characterized in that: f1=30kHz,f2=1.56MHz; or, f1=25kHz, f2=0.95MHz.

9. The self-defrosting and deicing solar photovoltaic panel according to claim 1, characterized in that: The protective film (30) is a biaxially stretched polyester film, and a rectangular spiral thickened area (31) is provided in the middle area of ​​the biaxially stretched polyester film. The thickened area (31) completely covers the light-transmitting surface of the solar photovoltaic panel body (10).

10. A self-defrosting and deicing solar photovoltaic panel system according to any one of claims 1 to 9, characterized in that: It also includes a local weather real-time collection module for collecting real-time weather information from a local meteorological station, a weather intelligence analysis and planning module, a control module, and a temperature sensor for measuring the surface temperature of the protective film (30). The local weather real-time collection module collects intelligence information on snowy days, and the weather intelligence analysis and planning module formulates a snow removal plan; During the snow removal plan, when the temperature measured by the temperature sensor is less than the temperature threshold, the high-frequency oscillator operates intermittently.

Images