Photovoltaic power generation device and control method

Abstract

The invention discloses a photovoltaic power generation device and a control method, and belongs to the field of photovoltaic power generation. A photovoltaic power generation device comprises two sets of supporting frames, a rotating shaft rotationally connected between the two sets of supporting frames, a mounting frame fixedly connected to the rotating shaft and a photovoltaic panel fixed to the end of the mounting frame, and further comprises two sets of mounting boxes installed on the two sides of the photovoltaic panel respectively. A moving plate is slidably connected between the two mounting boxes, a cleaning wiper is fixedly connected to the bottom of the moving plate, and the cleaning wiper is attached to the end face of the photovoltaic panel in a sliding mode; the photovoltaic panel is driven to rotate around the rotating shaft, so that the photovoltaic panel rotates along with sunlight, maximum solar energy collection is achieved, and the solar energy collection efficiency is improved; and in cooperation with the arrangement of a moving plate and a cleaning wiper, the light facing surface of the photovoltaic panel can be effectively cleaned in the overturning process of the photovoltaic panel, the cleanliness of the surface of the photovoltaic panel is ensured, maximum photoelectric conversion is achieved, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic power generation device and a control method. Background Art

[0002] Photovoltaic power generation is a technology that uses the photoelectric effect of semiconductor materials to directly convert solar energy into electrical energy. With the growing global demand for clean energy and the cost reduction brought about by technological progress, photovoltaic power generation has become an important part of addressing climate change and energy transformation.

[0003] Photovoltaic power generation is based on the photoelectric effect in semiconductor materials. When sunlight shines on photovoltaic panels, photons interact with atoms in the semiconductor materials, allowing electrons to gain enough energy to jump to the conduction band, forming free electron and hole pairs. These carriers separate under the action of the built-in electric field and move in opposite directions, thereby forming an electric current in the external circuit.

[0004] At present, existing photovoltaic power generation devices still have many limitations. For example, the orientation of the photovoltaic panels is fixed, which results in the photovoltaic panels being unable to always maintain the optimal receiving angle with the sunlight at different times of the day, causing light energy loss and reducing the collection efficiency. In addition, since the photovoltaic panels are exposed to the outside world for a long time, dust, stains, etc. will adhere to their light-facing surfaces, thereby forming obstructions on the surface of the photovoltaic panels and reducing the photoelectric conversion efficiency. Therefore, a photovoltaic power generation device and a control method are proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art that the photovoltaic panels cannot always maintain the optimal receiving angle with the sunlight, thereby reducing the collection efficiency; and the external dust and stains will form obstructions on the surface of the photovoltaic panels, reducing the photoelectric conversion efficiency, and to propose a photovoltaic power generation device and control method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The lifting of the ...

[0008] In order to improve the power generation effect, preferably, the driving part includes a driving motor, the driving motor is fixed on the support frame, a single-tooth gear is fixedly connected to the output shaft of the driving motor, one end of the rotating shaft passes through the support frame and is fixedly connected to the driving gear, the single-tooth gear is meshed with the driving gear, and a counterweight is fixedly connected to the top of the movable plate.

[0009] Furthermore, the other end of the rotating shaft passes through the other side support frame and is fixedly connected to a worm, and a worm wheel is rotatably connected to the support frame, and the worm and the worm wheel are meshed and connected.

[0010] Furthermore, a controller is installed on the support frame, and the controller is electrically connected to the drive motor.

[0011] In order to improve the neatness of the light-guiding surface of the photovoltaic panel, preferably, the guide part includes a piston box, the piston box is fixed on the support frame, a piston plate is slidably connected inside the piston box, the top of the piston plate is hinged with a push-pull rod, the other end of the push-pull rod is rotatably connected to the side wall of the single-tooth gear, the bottom end of the rain collecting box is connected to the bottom of the inner cavity of the piston box through a liquid extraction pipe, and a one-way valve is provided in the liquid extraction pipe.

[0012] Furthermore, a first guide groove is provided in the support frame on the same side as the piston box, a second guide groove is provided in the rotating shaft, and a third guide groove is provided in the mounting frame. The first guide groove, the second guide groove and the third guide groove are connected in sequence, and a one-way valve is provided in the first guide groove. Both sides of the third guide groove are fixed and connected with a liquid guide tube, and the other end of the liquid guide tube is connected to the corresponding liquid storage box cavity.

[0013] In order to better achieve the cleaning effect, preferably, a liquid inlet is provided between the liquid storage box and the inner cavity of the installation box, the switching part includes four groups of switching plates, the four groups of switching plates are slidably connected to the four ends of the two groups of installation boxes, and the switching plates pass through the ends of the installation boxes, the switching plates are tightly fitted to the inner wall of the installation box, and a reset spring is fixedly connected between the outer end of the switching plate and the end of the installation box, a liquid guide groove is provided in the movable plate, and a plurality of groups of drip holes are provided at equal intervals at the bottom of the liquid guide groove, and the output end of the drip hole is located at the top of the cleaning wipe.

[0014] Preferably, the liquid guide groove is opened at the end center of the movable plate, the liquid guide groove and the center of the liquid inlet are on the same axis, and the distance from the side wall of the movable plate end to the liquid guide groove is greater than the inner diameter of the liquid inlet.

[0015] In order to reduce the friction in the installation box, preferably, both ends of the installation box are provided with dust discharge grooves, and the dust discharge grooves are located at the bottom side of the end of the installation box.

[0016] A photovoltaic power generation control method, comprising the following steps:

[0017] Step 1: Use the controller to set the drive motor to rotate at a fixed time and number of revolutions, so that the photovoltaic panel rotates with the sunlight;

[0018] Step 2: Convert the solar energy absorbed by the photovoltaic panels into electrical energy and store it;

[0019] Step 3: While the photovoltaic panel is rotating along the axis of rotation, use a cleaning wipe to clean the light-facing surface.

[0020] Step 4: While the shaft is rotating, rainwater or artificially added water is drawn onto the cleaning wipe to achieve flushing and cleaning.

[0021] Compared with the prior art, the present invention provides a photovoltaic power generation device and control method, which has the following beneficial effects:

[0022] 1. This photovoltaic power generation device drives the photovoltaic panel to rotate around the rotation axis so that it rotates with the sunlight, thereby maximizing the solar energy collection and improving the solar energy collection efficiency. In addition, in conjunction with the setting of the movable plate and the cleaning wipe, it can effectively clean the light-facing surface of the photovoltaic panel during the flipping process of the photovoltaic panel, ensure the cleanliness of the photovoltaic panel surface, achieve maximum photoelectric conversion, and improve power generation efficiency.

[0023] 2. When the single-tooth gear rotates, the photovoltaic power generation device cooperates with the setting of the piston plate and the push-pull rod to fill the filtered rainwater in the rain collection box into the liquid storage box. When the movable plate moves to the inclined lower end of the installation box, the liquid inlet is connected to the liquid guide groove. At this time, the clean water will moisten the cleaning wipe. At this time, the wet cleaning wipe can better clean the surface of the photovoltaic panel, further ensuring the cleanliness of the photovoltaic panel surface and improving the power generation efficiency of the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic power generation device proposed by the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of a photovoltaic power generation device proposed by the present invention. Figure 2 ;

[0026] Figure 3 A photovoltaic power generation device proposed by the present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0027] Figure 4 This is a schematic diagram of a partial cross-sectional structure of a photovoltaic power generation device proposed by the present invention;

[0028] Figure 5 A photovoltaic power generation device proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0029] Figure 6 This is a schematic diagram of a partial cross-sectional structure of a photovoltaic power generation device proposed by the present invention;

[0030] Figure 7 A photovoltaic power generation device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of the middle C area;

[0031] Figure 8 A photovoltaic power generation device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of the middle D area;

[0032] Figure 9 This is a flow chart of a photovoltaic power generation control method proposed in the present invention.

[0033] In the figure: 1. Support frame; 2. Rotating shaft; 21. Mounting frame; 22. Photovoltaic panel; 3. Mounting box; 31. Moving plate; 32. Cleaning wipe; 33. Ash discharge trough; 4. Rain collecting box; 41. Filter plate; 42. Liquid storage box; 5. Driving motor; 51. Single tooth gear; 52. Driving gear; 53. Controller; 54. Counterweight; 55. Worm; 56. Worm gear; 6. Piston box; 61. Piston plate; 62. Push-pull rod; 63. Liquid extraction pipe; 64. First guide groove; 641. Second guide groove; 642. Third guide groove; 65. Liquid guide pipe; 7. Liquid inlet; 71. Switching plate; 72. Return spring; 73. Liquid guide groove; 731. Drip hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, 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, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] Example 1:

[0037] Reference Figures 1-8 , a photovoltaic power generation device includes two groups of support frames 1, a rotating shaft 2 rotatably connected between the two groups of support frames 1, a mounting frame 21 fixedly connected to the rotating shaft 2, and a photovoltaic panel 22 fixed to the end of the mounting frame 21, and further includes: two groups of mounting boxes 3, the two groups of mounting boxes 3 are respectively mounted on both sides of the photovoltaic panel 22, a movable plate 31 is slidably connected between the two groups of mounting boxes 3, a cleaning wipe 32 is fixedly connected to the bottom of the movable plate 31, the cleaning wipe 32 slides in contact with the end surface of the photovoltaic panel 22, and a driving part for driving the photovoltaic panel 22 to rotate and making the cleaning wipe 32 slide back and forth is provided on the support frame 1, the rain collecting box 4 is fixed on the top of one group of support frames 1, a filter plate 41 is fixedly connected to the top of the inner cavity of the rain collecting box 4, and a liquid storage box 42 is fixedly connected on both sides of each group of mounting boxes 3, wherein a diversion part for filling the water flow in the rain collecting box 4 into the liquid storage box 42 is provided on the support frame 1, and a switching part for switching the diversion state of the liquid storage box 42 in different positions is provided at both ends of the mounting box 3.

[0038] Reference Figure 1 、 Figure 2, wherein the driving part includes a driving motor 5, which is fixed on the support frame 1, and a single-tooth gear 51 is fixedly connected to the output shaft of the driving motor 5. One end of the rotating shaft 2 passes through the support frame 1 and is fixedly connected to a driving gear 52. The single-tooth gear 51 is meshed with the driving gear 52, and a counterweight 54 is fixedly connected to the top of the movable plate 31. A controller 53 is installed on the support frame 1, and the controller 53 is electrically connected to the driving motor 5.

[0039] By setting the above structure, when the driving motor 5 rotates one circle, the meshing relationship between the single-tooth gear 51 and the driving gear 52 will cause the rotating shaft 2 to rotate by a corresponding angle, so that the photovoltaic panel 22 can always follow the sunlight during use, thereby maximizing the solar energy collection and improving the solar energy collection efficiency. Moreover, at night, the light-facing side of the photovoltaic panel 22 is turned over and faces downward, which can effectively avoid the adhesion of dust and dew at night, thereby protecting the photovoltaic panel 22 and ensuring the power generation efficiency of the photovoltaic panel 22. Moreover, due to the continuous movement of the photovoltaic panel 22, It will be difficult for animals such as birds to stay on it, which helps to protect the safety of the equipment and reduce the failure rate of the equipment. In addition, during the rotation of the photovoltaic panel 22, when it deviates from the horizontal state and tilts, under the action of the gravity of the counterweight block 54, it will drive the movable plate 31 to slide along the mounting boxes 3 on both sides. At this time, the cleaning wipe 32 will slide along the light-facing surface of the photovoltaic panel 22, thereby achieving effective cleaning of the light-facing surface of the photovoltaic panel 22, avoiding dust, dirt, etc. from adhering to the surface of the photovoltaic panel 22 to form an obstruction, ensuring the cleanliness of the surface of the photovoltaic panel 22, achieving maximum photoelectric conversion, and improving power generation efficiency.

[0040] Reference Figure 2 、 Figure 3 The other end of the rotating shaft 2 passes through the support frame 1 on the other side and is fixedly connected to a worm 55, and a worm wheel 56 is rotatably connected to the support frame 1, and the worm 55 and the worm wheel 56 are meshed with each other; the self-locking effect of the worm 55 and the worm wheel 56 can ensure that the photovoltaic panel 22 always rotates in one direction, avoiding its reverse reset rotation under the action of gravity, thereby ensuring the rotation effect of the photovoltaic panel 22.

[0041] Reference Figure 2 、 Figure 4-Figure 8, wherein the guide part includes a piston box 6, which is fixed on the support frame 1, and a piston plate 61 is slidably connected in the piston box 6. The top of the piston plate 61 is hinged with a push-pull rod 62, and the other end of the push-pull rod 62 is rotatably connected to the side wall of the single-tooth gear 51. The bottom end of the rain collecting box 4 is connected to the bottom of the inner cavity of the piston box 6 through a liquid extraction pipe 63, and a one-way valve is provided in the liquid extraction pipe 63; a first guide groove 64 is provided in the support frame 1 on the same side as the piston box 6, a second guide groove 641 is provided in the rotating shaft 2, and a third guide groove 642 is provided in the mounting frame 21. The first guide groove 64, the second guide groove 641 and the third guide groove 642 are connected in sequence, and a one-way valve is provided in the first guide groove 64, and the third guide groove 642 is connected in sequence. Both sides of the guide groove 642 are fixed and connected with a liquid guide tube 65, and the other end of the liquid guide tube 65 is connected to the corresponding inner cavity of the liquid storage box 42; a liquid inlet 7 is provided between the liquid storage box 42 and the inner cavity of the installation box 3, and the switching part includes four groups of switching plates 71, and the four groups of switching plates 71 are respectively slidably connected to the four ends of the two groups of installation boxes 3, and the switching plates 71 pass through the ends of the installation boxes 3, and the switching plates 71 are tightly fitted to the inner wall of the installation box 3. A reset spring 72 is fixedly connected between the outer end of the switching plate 71 and the end of the installation box 3, and a liquid guide groove 73 is provided in the movable plate 31. A plurality of groups of drip holes 731 are evenly spaced at the bottom of the liquid guide groove 73, and the output end of the drip hole 731 is located at the top of the cleaning wipe 32.

[0042] By setting the above structure, rainwater can be collected through the rain collecting box 4 on rainy days, and when the single tooth gear 51 rotates, it cooperates with the setting of the push-pull rod 62 to drive the piston plate 61 to slide back and forth up and down in the piston box 6. When the piston plate 61 slides upward, suction is generated in the piston box 6, thereby opening the one-way valve in the liquid extraction pipe 63, so that the rainwater in the rain collecting box 4 is filtered by the filter plate 41 and then sucked into the piston box 6. Then, when the piston plate 61 slides downward, it will compress the lower cavity of the piston box 6 and open the one-way valve in the first guide groove 64, so that the sucked clean water enters the liquid storage box 42 along the first guide groove 64, the second guide groove 641, the third guide groove 642 and the liquid guide pipe 65. When the inclination angle of the photovoltaic panel 22 is large enough, the movable plate 31 will When the cleaning wipe 32 is wetted, the cleaning agent 32 is pressed against the cleaning agent 32, and the cleaning agent 32 is pressed against the cleaning agent 32. When the cleaning wipe 32 is wetted, the cleaning agent 32 is pressed against the cleaning agent 32, and the cleaning agent 32 is pressed against the cleaning agent 32. When the cleaning wipe 32 is wetted, the cleaning agent 32 is pressed against the cleaning agent 32, and the cleaning agent 32 is pressed against the cleaning agent 32. When the cleaning wipe 32 is wetted, the cleaning agent 32 is pressed against the cleaning agent 32, and the cleaning agent 32 is pressed against the cleaning agent 32. When the cleaning agent 32 is wetted, the cleaning agent 32 is pressed against the cleaning agent 32, and the cleaning agent 32 is pressed against the cleaning agent 32.

[0043] In addition, by setting the return spring 72, the falling impact of the movable plate 31 can be effectively reduced, the impact wear is reduced, and the durability is improved; and water can also be added to the rain collecting box 4 manually on a regular basis to avoid long-term rainy or rainless seasons, which makes it difficult to wash the surface of the photovoltaic panel 22 with water.

[0044] Reference Figure 4 、 Figure 5 , wherein the liquid guide groove 73 is opened at the center of the end of the movable plate 31, the liquid guide groove 73 and the center of the liquid inlet 7 are on the same axis, and the distance from the side wall of the end of the movable plate 31 to the liquid guide groove 73 is greater than the inner diameter of the liquid inlet 7; as described above, in the process of the end of the movable plate 31 pushing the switching plate 71, it will first cover the liquid inlet 7, and then make the liquid inlet 7 connected with the liquid guide groove 73, so as to avoid spilling of clean water and ensure the sealing effect of the joint.

[0045] Reference Figure 2 、 Figure 5 , wherein, both ends of the installation box 3 are provided with dust discharge grooves 33, and the dust discharge grooves 33 are located on the bottom side of the end of the installation box 3; since the slideway of the installation box 3 is open on the side facing the photovoltaic panel 22, dust from the outside will enter the installation box 3, and in the process of the movable plate 31 sliding back and forth, the dust can be pushed out from the dust discharge grooves 33, thereby reducing the dust content in the installation box 3, avoiding excessive friction in the installation box 3, and ensuring the smooth sliding of the movable plate 31.

[0046] Example 2:

[0047] Reference Figures 1-8 , which is basically the same as the first embodiment, a photovoltaic power generation control method is proposed based on the first embodiment, and the steps are as follows:

[0048] Step 1: The controller 53 is used to set the driving motor 5 to rotate at a fixed time and number of revolutions, so that the photovoltaic panel 22 rotates following the sunlight;

[0049] Step 2: Convert the solar energy absorbed by the photovoltaic panel 22 into electrical energy and store it;

[0050] Step 3: While the photovoltaic panel 22 is rotating along the rotation axis 2, use the cleaning wipe 32 to clean the light-facing surface thereof;

[0051] Step 4: While the rotating shaft 2 is rotating, rainwater or artificially added water is pumped onto the cleaning wipe 32 to achieve flushing and cleaning.

[0052] Reference Figures 1-8In the present invention, when in use, the controller 53 is used to set the driving motor 5 to rotate at a fixed time and number of revolutions according to the sunlight offset speed in the use area. When the driving motor 5 rotates one circle, the meshing relationship between the single-tooth gear 51 and the driving gear 52 will cause the rotating shaft 2 to rotate a corresponding angle. In this way, the photovoltaic panel 22 can always follow the sunlight to rotate, thereby maximizing the solar energy collection and improving the solar energy collection efficiency. Moreover, at night, the light-facing side of the photovoltaic panel 22 is turned over and faces downward, which can effectively avoid the adhesion of dust and dew at night, thereby protecting the photovoltaic panel 22 and ensuring the safety of the photovoltaic panel 22. Power generation efficiency; and due to the continuous movement of the photovoltaic panel 22, birds and other animals will be very resistant to stay on it, which helps to protect the safety of the equipment and reduce the failure rate of the equipment; in addition, during the rotation of the photovoltaic panel 22, when it deviates from the horizontal state and tilts, under the action of the gravity of the counterweight block 54, it will drive the movable plate 31 to slide along the mounting boxes 3 on both sides. At this time, the cleaning wipe 32 will slide along the light-facing surface of the photovoltaic panel 22, thereby achieving effective cleaning of the light-facing surface of the photovoltaic panel 22, avoiding dust, dirt, etc. adhering to the surface of the photovoltaic panel 22 to form an obstruction, ensuring the cleanliness of the surface of the photovoltaic panel 22, achieving maximum photoelectric conversion, and improving power generation efficiency.

[0053] In addition, on rainy days, rainwater can be collected through the rain collecting box 4, and when the single tooth gear 51 rotates, in conjunction with the setting of the push-pull rod 62, it will drive the piston plate 61 to slide back and forth up and down in the piston box 6. When the piston plate 61 slides upward, suction will be generated in the piston box 6, thereby opening the one-way valve in the liquid extraction pipe 63, so that the rainwater in the rain collecting box 4 is filtered through the filter plate 41 and then sucked into the piston box 6. Then, when the piston plate 61 slides downward, it will compress the lower cavity of the piston box 6 and open the one-way valve in the first guide groove 64, so that the sucked clean water enters the liquid storage box 42 along the first guide groove 64, the second guide groove 641, the third guide groove 642 and the liquid guide pipe 65. When the inclination angle of the photovoltaic panel 22 is large enough, the movable plate 31 will slide to the photovoltaic panel 22. The inclined bottom end of the volt plate 22 will push the switching plate 71 to slide to the side of the tension return spring 72 under the action of the gravity of the movable plate 31 and the counterweight 54, so that the end of the movable plate 31 covers the liquid inlet 7, and finally the liquid inlet 7 is connected to the liquid guide groove 73, and finally the liquid in the liquid storage box 42 will drip onto the cleaning wipe 32 along the drip hole 731, thereby wetting the cleaning wipe 32, first of all, cleaning the cleaning wipe 32, and secondly, using the wet cleaning wipe 32 to better clean the surface of the photovoltaic panel 22, further ensuring the cleanliness of the surface of the photovoltaic panel 22 and improving the power generation efficiency of the photovoltaic panel 22; and using the collected rainwater for filtering and flushing, the consumption of water resources is reduced and the energy saving effect is improved.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A photovoltaic power generation device, comprising two sets of support frames (1), a rotating shaft (2) rotatably connected between the two sets of support frames (1), a mounting frame (21) fixedly connected to the rotating shaft (2), and a photovoltaic panel (22) fixed to the end of the mounting frame (21), characterized in that: Also includes: Two groups of installation boxes (3), the two groups of installation boxes (3) are respectively installed on both sides of the photovoltaic panel (22), a movable plate (31) is slidably connected between the two groups of installation boxes (3), a cleaning wipe (32) is fixedly connected to the bottom of the movable plate (31), the cleaning wipe (32) is fitted and slid with the end surface of the photovoltaic panel (22), and a driving part for driving the photovoltaic panel (22) to rotate and causing the cleaning wipe (32) to slide back and forth is provided on the support frame (1). A rain collecting box (4) is fixed on the top of one group of support frames (1), a filter plate (41) is fixedly connected to the top of the inner cavity of the rain collecting box (4), and both sides of each group of the installation boxes (3) are fixedly connected to liquid storage boxes (42). The support frame (1) is provided with a diversion portion for charging the water flow in the rain collecting box (4) into the liquid storage box (42), and both ends of the installation box (3) are provided with switching portions for switching the diversion state of the liquid storage box (42) at different positions.

2. A photovoltaic power generation device according to claim 1, characterized in that: The driving part comprises a driving motor (5), the driving motor (5) is fixed on the support frame (1), a single tooth gear (51) is fixedly connected to the output shaft of the driving motor (5), one end of the rotating shaft (2) passes through the support frame (1) and is fixedly connected to a driving gear (52), the single tooth gear (51) and the driving gear (52) are meshed and connected, and a counterweight (54) is fixedly connected to the top of the movable plate (31).

3. A photovoltaic power generation device according to claim 2, characterized in that: The other end of the rotating shaft (2) passes through the other side support frame (1) and is fixedly connected to a worm (55); a worm wheel (56) is rotatably connected to the support frame (1); and the worm (55) and the worm wheel (56) are meshedly connected.

4. A photovoltaic power generation device according to claim 2, characterized in that: A controller (53) is installed on the support frame (1), and the controller (53) is electrically connected to the drive motor (5).

5. A photovoltaic power generation device according to claim 2, characterized in that: The guide portion includes a piston box (6), which is fixed on the support frame (1). A piston plate (61) is slidably connected in the piston box (6), and a push-pull rod (62) is hinged on the top of the piston plate (61). The other end of the push-pull rod (62) is rotatably connected to the side wall of the single-tooth gear (51). The bottom end of the rain collecting box (4) is connected to the bottom of the inner cavity of the piston box (6) through a liquid extraction pipe (63), and a one-way valve is provided in the liquid extraction pipe (63).

6. A photovoltaic power generation device according to claim 5, characterized in that: A first guide groove (64) is provided in the support frame (1) on the same side as the piston box (6), a second guide groove (641) is provided in the rotating shaft (2), and a third guide groove (642) is provided in the mounting frame (21). The first guide groove (64), the second guide groove (641) and the third guide groove (642) are sequentially connected, and a one-way valve is provided in the first guide groove (64). Both sides of the third guide groove (642) are fixed and connected with a liquid guide tube (65), and the other end of the liquid guide tube (65) is connected to the inner cavity of the corresponding liquid storage box (42).

7. The photovoltaic power generation device according to claim 1, characterized in that: A liquid inlet (7) is provided between the liquid storage box (42) and the inner cavity of the installation box (3); the switching portion comprises four groups of switching plates (71); the four groups of switching plates (71) are slidably connected to the four ends of the two groups of installation boxes (3), and the switching plates (71) pass through the ends of the installation boxes (3); the switching plates (71) are tightly fitted with the inner wall of the installation box (3); a return spring (72) is fixedly connected between the outer end of the switching plate (71) and the end of the installation box (3); a liquid guide groove (73) is provided in the movable plate (31); a plurality of groups of drip holes (731) are provided at equal intervals at the bottom of the liquid guide groove (73), and the output end of the drip hole (731) is located at the top of the cleaning wipe (32).

8. A photovoltaic power generation device according to claim 7, characterized in that: The liquid guide groove (73) is opened at the center of the end of the movable plate (31), and the liquid guide groove (73) and the center of the liquid inlet (7) are on the same axis. The distance from the side wall of the end of the movable plate (31) to the liquid guide groove (73) is greater than the inner diameter of the liquid inlet (7).

9. The photovoltaic power generation device according to claim 7, characterized in that: Both ends of the installation box (3) are provided with dust discharge grooves (33), and the dust discharge grooves (33) are located at the bottom side of the end of the installation box (3).

10. A photovoltaic power generation control method, using a photovoltaic power generation device according to any one of claims 1 to 9, characterized in that: Here are the steps: Step 1: The controller (53) is used to set the driving motor (5) to rotate at a fixed time and number of revolutions, so that the photovoltaic panel (22) rotates following the sunlight; Step 2: converting the solar energy absorbed by the photovoltaic panel (22) into electrical energy and storing it; Step 3: While the photovoltaic panel (22) is rotating along the rotation axis (2), the light-facing surface thereof is cleaned using a cleaning wipe (32); Step 4: When the rotating shaft (2) rotates, rainwater or artificially added water is pumped onto the cleaning wipe (32) to achieve flushing and cleaning.

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