A solar photovoltaic adjustable roof and control method thereof

Abstract

The present invention relates to a solar photovoltaic adjustable roof and a control method thereof, comprising a roof body, on which a plurality of photovoltaic panel adjusting parts are arranged, each photovoltaic panel adjusting part comprising an outer tube and an inner tube, the inner tube being located in the outer tube, a second arc-shaped opening being opened on one side of the inner tube, a waterproof flexible photovoltaic panel being attached to the arc-shaped outer surface of the other side of the inner tube, a first arc-shaped opening being opened on one side of the outer tube, a water-absorbing cleaning brush being attached to the arc-shaped inner surface of the other side of the outer tube, and the outer tube being rotated to open or close the water storage cavity of the inner tube, the cleaning and cooling water in the water storage cavity can not only clean the water-absorbing cleaning brush, but also cool the waterproof flexible photovoltaic panel; the outer tube and the inner tube are rotated relative to each other, so that the water-absorbing cleaning brush can remove dust on the surface of the waterproof flexible photovoltaic panel, so that the second arc-shaped opening is moved to a position overlapping with the first arc-shaped opening, and the cleaning and cooling water in the water storage cavity can be discharged.

Description

Technical Field

[0001] The invention relates to a photovoltaic building component, in particular to a solar photovoltaic adjustable roof and a control method thereof. Background Art

[0002] Dust can cause the following defects to photovoltaic panels:

[0003] 1. Impact on solar radiation: Dust deposited on the surface of photovoltaic modules will block sunlight, reduce the transmittance of the glass on the surface of photovoltaic modules, and reduce the amount of solar radiation irradiating the surface of the battery. This will lead to a decrease in the power generation performance of photovoltaic modules.

[0004] 2. Increase temperature rise: Dust will also increase the temperature rise of photovoltaic modules, because dust absorbs solar radiation and converts it into its own heat energy, while blocking the external heat dissipation of the photovoltaic module cover, further affecting the performance of photovoltaic modules.

[0005] 3. Change the incident path of light: Dust forms a layer of dust on the surface of photovoltaic modules. When the incident angle of sunlight increases, the path of sunlight in the dust layer will be longer, and it will be more likely to be reflected, scattered, and absorbed, which will affect the propagation path of light and the power generation efficiency of photovoltaic modules.

[0006] 4. Accelerate the aging of solar panels: Dust adheres to the surface of solar panels, which will block, absorb and reflect light, affecting the absorption of light by photovoltaic panels, thereby affecting the efficiency of photovoltaic power generation. In the long run, dust deposition will accelerate the aging of solar panels, reduce output, and even cause components to burn out in severe cases.

[0007] Therefore, photovoltaic panels need to be cleaned of surface dust regularly to ensure the normal operation of the photovoltaic power generation system and extend its service life. Especially in northern China, which is dry and rainy, photovoltaic panels will accumulate a lot of dust after a short period of use, affecting their normal use.

[0008] In addition, the photovoltaic panels are in a high temperature state for a long time, which will also affect the power generation performance of the photovoltaic modules. The existing technology does not take into account dust removal and cooling combined with the photovoltaic roof structure. Summary of the invention

[0009] The present invention designs a solar photovoltaic adjustable roof and a control method thereof, which solves the following technical problems: (1) the existing photovoltaic panel dust removal needs to be done manually or the dust removal effect is poor, which affects the normal operation of the photovoltaic power generation system. (2) The existing technology does not have a photovoltaic roof structure that combines dust removal and cooling.

[0010] In order to solve the above-mentioned technical problems, the present invention adopts the following solutions:

[0011] A solar photovoltaic adjustable roof comprises a roof body, on which a plurality of photovoltaic panel adjusting parts are arranged, characterized in that: each photovoltaic panel adjusting part comprises an outer tube and an inner tube, the inner tube is located in the outer tube, a second arc-shaped opening is opened on one side of the inner tube, a waterproof flexible photovoltaic panel is attached to the arc-shaped outer surface of the other side of the inner tube, a first arc-shaped opening is opened on one side of the outer tube, a water-absorbing cleaning brush is attached to the arc-shaped inner surface of the other side of the outer tube, and rotating the outer tube can open or close the water storage cavity of the inner tube, and the cleaning and cooling water in the water storage cavity can not only clean the water-absorbing cleaning brush, but also cool the waterproof flexible photovoltaic panel; the outer tube and the inner tube rotate relative to each other, so that the water-absorbing cleaning brush can remove dust on the surface of the waterproof flexible photovoltaic panel, so that the second arc-shaped opening is to a position overlapping with the first arc-shaped opening, and the cleaning and cooling water in the water storage cavity can be discharged.

[0012] Preferably, the outer tube is rotated by a first driving device, which includes a first motor, a first driving gear and a first driven gear. The first motor drives the first driving gear to rotate, the first driven gear is sleeved on the outer tube, and the first driving gear and the first driven gear are meshed with each other.

[0013] Preferably, when multiple outer tubes share the first driving device, each outer tube is provided with a first driven gear, and the multiple first driven gears are meshed with each other. The meshing of the first driving gear with any one of the multiple first driven gears can enable multiple photovoltaic panel adjustment components to work synchronously.

[0014] Preferably, the inner tube is rotated by a second driving device, which includes a second motor, a second driving gear and a second driven gear. The second motor drives the second driving gear to rotate, and the second driven gear is sleeved on the inner tube. The length of the inner tube is greater than that of the outer tube to facilitate the installation of the second driven gear at the end of the inner tube, and the second driving gear and the second driven gear are meshed with each other.

[0015] Preferably, when multiple inner tubes share the second driving device, each inner tube is provided with a second driven gear, and the multiple second driven gears are meshed with each other. The meshing of the second driving gear with any one of the multiple second driven gears can enable multiple photovoltaic panel adjustment components to work synchronously.

[0016] Preferably, the end of the inner tube is connected to the cleaning and cooling water main pipe, and the water pump on the cleaning and cooling water main pipe can deliver the cleaning and cooling water into the water storage cavity.

[0017] Preferably, the inner tube end of each photovoltaic panel adjustment member is connected to the cleaning and cooling water main pipe through a cleaning and cooling water auxiliary pipe, the outer tube end does not have a first arc-shaped opening, and the inner tube end does not have a second arc-shaped opening. A bearing is provided between the outer tube end and the inner tube end and is sealed by a sealing ring; the cleaning and cooling water auxiliary pipe end is connected to the inner tube through a water supply rotary joint, and a water guide channel is provided in the roof body. The cleaning and cooling water discharged from the water storage cavity enters the water guide channel and is discharged to the outside from the drain outlet of the roof body.

[0018] A control method for a solar photovoltaic adjustable roof comprises the following steps:

[0019] Step 1: The temperature sensor on the waterproof flexible photovoltaic panel detects the temperature T of the waterproof flexible photovoltaic panel. When the temperature T is greater than T1, T1 is any temperature value between 50-70°C, the water pump is started to transport the cleaning and cooling water to the inner pipe through the cleaning and cooling water main pipe, and the external waterproof flexible photovoltaic panel is cooled by transporting the cleaning and cooling water; when the water level in the inner pipe reaches the preset position, the water pump stops delivering water;

[0020] Step 2: When the temperature T measured by the temperature sensor is less than T1, but the control unit shows that the power generation performance of the photovoltaic module has not been improved or the improvement ratio has not reached the preset value;

[0021] Step 3, start the first driving device, the outer tube rotates so that the water-absorbing cleaning brush can remove dust on the surface of the waterproof flexible photovoltaic panel, and at the same time, the second arc opening is opened to a position overlapping with the first arc opening, so that the cleaning and cooling water in the water storage cavity can be discharged;

[0022] Step 4, start the first driving device again, the outer tube rotates in the opposite direction to return to its original state, and start the water pump again to transport cleaning and cooling water to the inner tube to further cool the waterproof flexible photovoltaic panel. At the same time, the cleaning and cooling water can clean the water-absorbing cleaning brush;

[0023] Step 5, the waterproof flexible photovoltaic panel works for N minutes, N>0, and the control unit displays whether the power generation performance of the photovoltaic module is improved or whether the improvement ratio reaches the preset value: if it is not improved or the improvement ratio does not reach the preset value, repeat steps 3-4 until the control unit displays that the power generation performance of the photovoltaic module is improved or reaches the preset value; if it is improved or the improvement ratio reaches the preset value, the first drive device is no longer started.

[0024] Preferably, in step 6, if after repeating steps 3-4n times, n≥3, and the control unit shows that the power generation performance of the photovoltaic module has not improved or has not reached the preset value, the second driving device is started so that the second arc opening and the first arc opening are both facing upward, and then the water pump is turned on to transport cleaning and cooling water to the inner tube, so that the waterproof flexible photovoltaic panel has a better cooling effect when it is facing away from the sunlight.

[0025] A control method for a solar photovoltaic adjustable roof comprises the following steps:

[0026] Step 1: The light intensity sensor on the waterproof flexible photovoltaic panel detects the light intensity in the environment, and the control unit determines whether it is day or night according to the light intensity sensor signal;

[0027] Step 2. When it is judged to be night, start the first driving device, and the outer tube rotates so that the water-absorbing cleaning brush completely covers the waterproof flexible photovoltaic panel to prevent dust from adhering to the waterproof flexible photovoltaic panel due to the temperature drop at night; when it is judged to be daytime, start the first driving device again, and the outer tube rotates so that the waterproof flexible photovoltaic panel is located in the first arc-shaped opening of the outer tube, so that the waterproof flexible photovoltaic panel can work normally.

[0028] Compared with the prior art, the solar photovoltaic adjustable roof and its control method have the following beneficial effects:

[0029] (1) The present invention enables the inner and outer tubes to rotate relative to each other so that the water-absorbing cleaning brush absorbs the cleaning cooling water and cleans the dust on the waterproof flexible photovoltaic panel. At the same time, the cleaning cooling water can also cool the waterproof flexible photovoltaic panel, thereby taking into account the effects of cooling and dust removal, thereby improving the power generation performance of the photovoltaic panel.

[0030] (2) The present invention covers the waterproof flexible photovoltaic panel with a water-absorbing cleaning brush at night to prevent dust from adhering to the waterproof flexible photovoltaic panel due to the low temperature at night.

[0031] (3) When the waterproof flexible photovoltaic panel has a poor cooling effect, the present invention rotates the waterproof flexible photovoltaic panel downward so that sunlight cannot shine on the waterproof flexible photovoltaic panel. At the same time, the water storage cavity introduces cleaning cooling water to achieve cooling, thereby achieving the best cooling purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : Schematic diagram of the appearance of the solar photovoltaic adjustable roof of the present invention;

[0033] Figure 2 : Schematic diagram of the position between the inner and outer tubes of the waterproof flexible photovoltaic panel of the present invention;

[0034] Figure 3 : Schematic diagram of the position between the inner and outer tubes when the water storage cavity discharges cleaning and cooling water in the present invention;

[0035] Figure 4 : A schematic diagram of the structure of the inner tube in the present invention;

[0036] Figure 5 : Figure 2 Mid-axial section view;

[0037] Figure 6 : Figure 3Mid-axial section view;

[0038] Figure 7 : Schematic diagram of driving multiple first driven gears in the present invention;

[0039] Figure 8 : Schematic diagram of the sealing structure between the inner and outer tube ends of the present invention;

[0040] Fig. 9 : A top view of the solar photovoltaic adjustable roof of the present invention.

[0041] Description of reference numerals:

[0042] 1—photovoltaic panel adjustment member; 11—outer tube; 111—first arc-shaped opening; 112—water-absorbing cleaning brush; 12—inner tube; 121—waterproof flexible photovoltaic panel; 122—second arc-shaped opening; 123—water storage cavity; 2—roof body; 21—drain outlet; 3—first motor; 31—first driving gear; 32—first driven gear; 4—cleaning cooling water main pipe; 41—cleaning cooling water auxiliary pipe; 51—bearing; 52—sealing ring; 6—second driven gear; 7—water supply rotary joint. DETAILED DESCRIPTION

[0043] Combine the following Figures 1 to 9 , the present invention is further described:

[0044] like Figure 1 As shown, a solar photovoltaic adjustable roof includes a roof body 2 on which a plurality of photovoltaic panel adjusting members 1 are arranged.

[0045] like Figure 2-Figure 6 As shown, each photovoltaic panel adjustment member 1 includes an outer tube 11 and an inner tube 12, the inner tube 12 is located in the outer tube 11, a second arc-shaped opening 122 is opened on one side of the inner tube 12, and the waterproof flexible photovoltaic panel 121 is attached to the arc-shaped outer surface on the other side of the inner tube 12, and a first arc-shaped opening 111 is opened on one side of the outer tube 11, and a water-absorbing cleaning brush 112 is attached to the arc-shaped inner surface on the other side of the outer tube 11, and rotating the outer tube 11 can open or close the water storage cavity 123 of the inner tube 12, and the cleaning and cooling water in the water storage cavity 123 can not only clean the water-absorbing cleaning brush 112, but also cool the waterproof flexible photovoltaic panel 121; the outer tube 11 and the inner tube 12 rotate relative to each other, so that the water-absorbing cleaning brush 112 can remove dust on the surface of the waterproof flexible photovoltaic panel 121, so that the second arc-shaped opening 122 is to a position overlapping with the first arc-shaped opening 111, and the cleaning and cooling water in the water storage cavity 123 can be discharged.

[0046] The waterproof flexible photovoltaic panel 121 is designed to be able to safely contact water without being damaged. The construction of the photovoltaic panel includes solar cells sealed under the tempered glass, which are laminated with EVA to form a sealed structure to prevent moisture from entering. Even if moisture enters the cell, it can short-circuit due to the characteristics of the solar cell, but this short-circuit is temporary, and once the short-circuit disappears, the cell can be used as before.

[0047] The outer tube 11 is rotated by a first driving device, which includes a first motor 3, a first driving gear 31 and a first driven gear 32. The first motor 3 drives the first driving gear 31 to rotate. The first driven gear 32 is sleeved on the outer tube 11, and the first driving gear 31 and the first driven gear 32 are meshed with each other.

[0048] like Figure 7 As shown, when multiple outer tubes 11 share the first driving device, each outer tube 11 is provided with a first driven gear 32, and the multiple first driven gears 32 are meshed with each other. The meshing of the first driving gear 31 with any one of the multiple first driven gears 32 can enable multiple photovoltaic panel adjustment components 1 to work synchronously.

[0049] The inner tube 12 is rotated by a second driving device, which includes a second motor, a second driving gear and a second driven gear. The second motor drives the second driving gear to rotate, and the second driven gear is sleeved on the inner tube 12. The length of the inner tube 12 is greater than that of the outer tube 11, so that the second driven gear 6 can be installed at the end of the inner tube 12. The second driving gear and the second driven gear 6 are meshed with each other.

[0050] When multiple inner tubes 12 share the second driving device, each inner tube 12 is provided with a second driven gear, and the multiple second driven gears are meshed with each other. The meshing of the second driving gear with any one of the multiple second driven gears can enable multiple photovoltaic panel adjusters 1 to work synchronously.

[0051] The end of the inner tube 12 is connected to the cleaning and cooling water main pipe 4 , and the water pump on the cleaning and cooling water main pipe 4 can deliver the cleaning and cooling water into the water storage cavity 123 .

[0052] The end of the inner tube 12 of each photovoltaic panel adjustment member 1 is connected to the cleaning and cooling water main pipe 4 through a cleaning and cooling water auxiliary pipe 41. The end of the outer tube 11 does not have the first arc opening 111, and the end of the inner tube 12 does not have the second arc opening 122.

[0053] like Figure 8As shown, a bearing 51 is provided between the end of the outer tube 11 and the end of the inner tube 12 and is sealed by a sealing ring 52; the end of the cleaning and cooling water auxiliary pipe 41 is connected to the inner tube 12 through a water supply rotary joint 7, and a water guide channel is provided in the roof body 2. The cleaning and cooling water discharged from the water storage cavity 123 enters the water guide channel and is discharged to the outside from the drain port 21 of the roof body 2.

[0054] The water supply rotary joint 7 plays the role of a dynamic and static combined connector, and its structure is diverse in the prior art. The specific structure of the water supply rotary joint 7 can adopt the specific structure of the "water supply rotary joint 8" in the Chinese authorized invention patent CN105432487B.

[0055] like Fig. 9 As shown, the first control method of the solar photovoltaic adjustable roof of the present invention comprises the following steps:

[0056] Step 1. The temperature sensor on the waterproof flexible photovoltaic panel 121 detects the temperature T of the waterproof flexible photovoltaic panel 121. When the temperature T is greater than T1, T1 is any temperature value between 50-70°C, the water pump is started, and the cleaning and cooling water is transported to the inner tube 12 through the cleaning and cooling water main pipe 4. The external waterproof flexible photovoltaic panel 121 is cooled by transporting the cleaning and cooling water; when the water level in the inner tube 12 reaches the preset position, the water pump stops delivering water.

[0057] Step 2: When the temperature T measured by the temperature sensor is less than T1, but the control unit shows that the power generation performance of the photovoltaic module has not been improved or the improvement ratio has not reached the preset value;

[0058] Step 3, start the first driving device, the outer tube 11 rotates so that the water-absorbing cleaning brush 112 can remove dust on the surface of the waterproof flexible photovoltaic panel 121, and at the same time the second arc-shaped opening 122 is moved to a position overlapping with the first arc-shaped opening 111, so as to discharge the cleaning and cooling water in the water storage cavity 123.

[0059] Step 4, start the first driving device again, the outer tube 11 rotates in the opposite direction to return to its original state, and start the water pump again to transport cleaning and cooling water to the inner tube 12 to further cool the waterproof flexible photovoltaic panel 121. At the same time, the cleaning and cooling water can clean the water-absorbing cleaning brush 112.

[0060] Step 5, the waterproof flexible photovoltaic panel 121 works for N minutes, N>0, and the control unit displays whether the power generation performance of the photovoltaic component is improved or whether the improvement ratio reaches the preset value: if it is not improved or the improvement ratio does not reach the preset value, repeat steps 3-4 until the control unit displays that the power generation performance of the photovoltaic component is improved or reaches the preset value; if it is improved or the improvement ratio reaches the preset value, the first drive device is no longer started.

[0061] Step 6. If steps 3-4 are repeated and the control unit shows that the power generation performance of the photovoltaic module has not improved or has not reached the preset value, start the second driving device so that the second arc opening 122 and the first arc opening 111 are both facing upward, and then start the water pump to deliver cleaning and cooling water to the inner tube 12. The waterproof flexible photovoltaic panel 121 is facing away from the sunlight for better cooling effect.

[0062] The first control method mainly plays the role of cooling and dust removal, improving the power generation performance of photovoltaic panels.

[0063] The second control method of the solar photovoltaic adjustable roof of the present invention comprises the following steps:

[0064] Step 1: The light sensor on the waterproof flexible photovoltaic panel 121 detects the light intensity in the environment, and the control unit determines whether it is day or night according to the light sensor signal.

[0065] Step 2. When it is judged to be night, start the first driving device, and the outer tube 11 rotates so that the water-absorbing cleaning brush 112 completely covers the waterproof flexible photovoltaic panel 121 to prevent dust from adhering to the waterproof flexible photovoltaic panel 121 due to the temperature drop at night; when it is judged to be daytime, start the first driving device again, and the outer tube 11 rotates so that the waterproof flexible photovoltaic panel 121 is located in the first arc-shaped opening 111 of the outer tube 11, so that the waterproof flexible photovoltaic panel 121 can work normally.

[0066] The second control method is mainly used to cover the waterproof flexible photovoltaic panel 121 at night to prevent dust from adhering to the waterproof flexible photovoltaic panel 121 due to the low temperature at night.

[0067] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A solar photovoltaic adjustable roof, comprising a roof body (2), on which a plurality of photovoltaic panel adjustment members (1) are arranged, characterized in that: Each photovoltaic panel adjustment member (1) comprises an outer tube (11) and an inner tube (12), wherein the inner tube (12) is located in the outer tube (11), a second arc-shaped opening (122) is opened on one side of the inner tube (12), a waterproof flexible photovoltaic panel (121) is attached to the arc-shaped outer surface of the other side of the inner tube (12), a first arc-shaped opening (111) is opened on one side of the outer tube (11), a water-absorbing cleaning brush (112) is attached to the arc-shaped inner surface of the other side of the outer tube (11), and the water storage space of the inner tube (12) can be opened or closed by rotating the outer tube (11). The cleaning and cooling water in the water storage cavity (123) can not only clean the water-absorbing cleaning brush (112), but also cool the waterproof flexible photovoltaic panel (121); the outer tube (11) and the inner tube (12) rotate relative to each other, so that the water-absorbing cleaning brush (112) can remove dust from the surface of the waterproof flexible photovoltaic panel (121), so that the second arc-shaped opening (122) is moved to a position overlapping with the first arc-shaped opening (111), and the cleaning and cooling water in the water storage cavity (123) can be discharged.

2. The solar photovoltaic adjustable roof according to claim 1, characterized in that: The outer tube (11) is rotated by a first driving device, the first driving device comprising a first motor (3), a first driving gear (31) and a first driven gear (32); the first motor (3) drives the first driving gear (31) to rotate, the first driven gear (32) is sleeved on the outer tube (11), and the first driving gear (31) and the first driven gear (32) are meshed with each other.

3. The solar photovoltaic adjustable roof according to claim 2 is characterized by: When a plurality of outer tubes (11) share the first driving device, a first driven gear (32) is provided on each outer tube (11), the plurality of first driven gears (32) mesh with each other, and the first driving gear (31) meshes with any one of the plurality of first driven gears (32), so that the plurality of photovoltaic panel adjusting members (1) can work synchronously.

4. The solar photovoltaic adjustable roof according to claim 3 is characterized by: The inner tube (12) is rotated by a second driving device, the second driving device comprising a second motor, a second driving gear and a second driven gear. The second motor drives the second driving gear to rotate. The second driven gear is sleeved on the inner tube (12). The inner tube (12) is longer than the outer tube (11) to facilitate installation of the second driven gear at the end of the inner tube (12). The second driving gear and the second driven gear are meshed with each other.

5. The solar photovoltaic adjustable roof according to claim 4 is characterized in that: When a plurality of inner tubes (12) share the second driving device, a second driven gear is provided on each inner tube (12), the plurality of second driven gears mesh with each other, and the engagement of the second driving gear with any one of the plurality of second driven gears enables the plurality of photovoltaic panel adjusting members (1) to operate synchronously.

6. The solar photovoltaic adjustable roof according to claim 5, characterized in that: The end of the inner tube (12) is connected to the cleaning and cooling water main pipe (4), and the water pump on the cleaning and cooling water main pipe (4) can deliver the cleaning and cooling water into the water storage cavity (123).

7. The solar photovoltaic adjustable roof according to claim 6, characterized in that: The end of the inner tube (12) of each photovoltaic panel adjusting member (1) is connected to the main cleaning and cooling water pipe (4) via a cleaning and cooling water auxiliary pipe (41); the end of the outer tube (11) does not have a first arc-shaped opening (111); the end of the inner tube (12) does not have a second arc-shaped opening (122); a bearing (51) is provided between the end of the outer tube (11) and the end of the inner tube (12), and a sealing ring (52) is used to seal the ends; the end of the cleaning and cooling water auxiliary pipe (41) is connected to the inner tube (12) via a water supply rotary joint (7); a water guide channel is provided in the roof body (2); the cleaning and cooling water discharged from the water storage cavity (123) enters the water guide channel and is discharged to the outside from the drainage port (21) of the roof body (2).

8. A control method for a solar photovoltaic adjustable roof according to claim 7, comprising the following steps: Step 1: The temperature sensor on the waterproof flexible photovoltaic panel (121) detects the temperature T of the waterproof flexible photovoltaic panel (121). When the temperature T is greater than T1, which is any temperature value between 50° C. and 70° C., the water pump is started to transport the cleaning and cooling water to the inner pipe (12) through the cleaning and cooling water main pipe (4). The external waterproof flexible photovoltaic panel (121) is cooled by transporting the cleaning and cooling water. When the water level in the inner pipe (12) reaches a preset position, the water pump is stopped from delivering water. Step 2: When the temperature T measured by the temperature sensor is less than T1, but the control unit shows that the power generation performance of the photovoltaic module has not been improved or the improvement ratio has not reached the preset value; Step 3, starting the first driving device, the outer tube (11) rotates so that the water-absorbing cleaning brush (112) can remove dust from the surface of the waterproof flexible photovoltaic panel (121), and at the same time, the second arc-shaped opening (122) is moved to a position overlapping with the first arc-shaped opening (111), so that the cleaning and cooling water in the water storage cavity (123) can be discharged; Step 4, starting the first driving device again, the outer tube (11) rotates in the opposite direction to return to its original state, and starting the water pump again to deliver cleaning and cooling water to the inner tube (12) to further cool the waterproof flexible photovoltaic panel (121), while the cleaning and cooling water can clean the water-absorbing cleaning brush (112); Step 5, the waterproof flexible photovoltaic panel (121) works for N minutes, N>0, and the control unit displays whether the power generation performance of the photovoltaic module is improved or whether the improvement ratio reaches a preset value; if it is not improved or the improvement ratio does not reach the preset value, repeat steps 3-4 until the control unit displays that the power generation performance of the photovoltaic module is improved or reaches the preset value; if it is improved or the improvement ratio reaches the preset value, the first driving device is no longer started.

9. The control method of the solar photovoltaic adjustable roof according to claim 8, characterized in that: Step 6: If after repeating steps 3-4 n times, n≥3, and the control unit indicates that the power generation performance of the photovoltaic assembly has not improved or has not reached the preset value, the second driving device is started so that the second arc-shaped opening (122) and the first arc-shaped opening (111) are both facing upwards, and then the water pump is turned on to deliver cleaning and cooling water to the inner tube (12), so that the waterproof flexible photovoltaic panel (121) faces away from the sunlight for a better cooling effect.

10. A control method for a solar photovoltaic adjustable roof according to claim 1, comprising the following steps: Step 1: The light intensity sensor on the waterproof flexible photovoltaic panel (121) detects the light intensity in the environment, and the control unit determines whether it is day or night according to the light intensity sensor signal; Step 2: when it is determined to be night, the first driving device is started, and the outer tube (11) rotates so that the water-absorbing cleaning brush (112) completely covers the waterproof flexible photovoltaic panel (121), thereby preventing dust from adhering to the waterproof flexible photovoltaic panel (121) due to the temperature drop at night; when it is determined to be daytime, the first driving device is started again, and the outer tube (11) rotates so that the waterproof flexible photovoltaic panel (121) is located in the first arc-shaped opening (111) of the outer tube (11), so that the waterproof flexible photovoltaic panel (121) can work normally.

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