A large-scale string photovoltaic power generation equipment

Abstract

The present invention discloses a large-scale photovoltaic power generation equipment of string type, which relates to the technical field of photovoltaic power generation equipment, including a flat plate, a photovoltaic unit, a dust detection unit, a dust removal unit, a maintenance unit, a protection unit and a central processing unit, wherein the photovoltaic unit is arranged on the top of the flat plate, the dust detection unit is arranged on the top of the flat plate, the dust removal unit is arranged on the top of the photovoltaic unit, and is used to remove dust from the photovoltaic unit, the maintenance unit is arranged on the top of the photovoltaic unit, the protection unit is arranged on the top of the flat plate, and the central processing unit is arranged inside the dust detection unit, and can receive and process data and control the power device of the photovoltaic power generation equipment. The present invention can detect the dust concentration in the control, and at the same time calculate the expected accumulation amount of dust concentration on the photovoltaic unit, and after the calculated accumulation amount reaches the set value, it can control the motor to drive the first brush to clean the photovoltaic unit.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation equipment, in particular to a large-scale string photovoltaic power generation equipment. Background Art

[0002] String photovoltaic power generation equipment is a device that converts the direct current generated by multiple parallel photovoltaic panels into alternating current through an inverter and then aggregates it to produce a large flow of current. Photovoltaic power generation equipment is easily covered with dust when exposed to the outside world for a long time. When there is too much dust, sunlight cannot effectively shine on the photovoltaic panels, which will affect the power generation efficiency of the photovoltaic panels.

[0003] The defects of existing photovoltaic power generation equipment are:

[0004] 1. Patent document JP2013038976A discloses a photovoltaic power generation device, which can configure a device for storing electricity by effectively utilizing the space where photovoltaic power generation panels are installed. The patent does not have a structure for cleaning dust from photovoltaic panels. When there is dust on the photovoltaic panels, the power generation efficiency of the photovoltaic panels will be affected, and traditional photovoltaic dust removal equipment cannot predict the amount of dust accumulated on the photovoltaic panels, and cannot select the time for cleaning the dust according to the amount of dust accumulated. Therefore, a large-scale string photovoltaic power generation device that can remove dust from photovoltaic panels and can select the time for cleaning the dust according to the estimated amount of accumulated dust is needed to solve this problem.

[0005] 2. Patent document JP2006101591A discloses a photovoltaic power generation device, which provides a photovoltaic power generation device capable of calculating the actual solar irradiance in an environment where a solar cell module is installed to accurately produce electricity. The patent does not have a cleaning structure. If the device is provided with an external cleaning structure, dust will be generated when cleaning the photovoltaic panel, and the dust will then fall on the photovoltaic panel, thereby causing the cleaning effect to deteriorate. Therefore, a large-scale string-type photovoltaic power generation device is needed to solve this problem, which can prevent the cleaning dust from continuing to fall on the photovoltaic device when cleaning the photovoltaic device.

[0006] 3. Patent document JP2015144547A discloses a photovoltaic power generation facility and a cleaning method for photovoltaic power generation equipment. The patent discloses a method for economically cleaning the light receiving surface of a solar panel and a reflector used in a photovoltaic power generation equipment, and has good operability. The equipment can clean the photovoltaic panel, but does not have a structure for cleaning the cleaning structure itself. If dust accumulates on the cleaning structure, it will also affect the cleaning effect of the photovoltaic panel. Therefore, a large-scale string-type photovoltaic power generation equipment that has a cleaning structure and can clean the cleaning structure itself is needed to solve this problem.

[0007] 4. Patent document CN107017827B discloses a photovoltaic power generation device with improved power generation efficiency. The patent discloses a photovoltaic power generation device with improved power generation efficiency. The photovoltaic power generation device does not use a transparent film to cover the photovoltaic device when cleaning the photovoltaic power generation device. Therefore, it is impossible to avoid dust falling on the photovoltaic device during cleaning. Some devices that use transparent films to cover photovoltaic panels do not have a structure to protect the transparent films. The transparent films will accelerate aging under long-term light exposure, thereby affecting the service life. Therefore, a large-scale string-type photovoltaic power generation device that can provide light-shielding protection for the film covering the photovoltaic panels is needed to solve this problem. Summary of the invention

[0008] One purpose of the present application is to provide a large-scale string photovoltaic power generation device that can solve the technical problems raised in the prior art.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-scale string photovoltaic power generation equipment, comprising a flat plate, a photovoltaic unit, a dust detection unit, a dust removal unit, a maintenance unit, a protection unit and a central processing unit, wherein the photovoltaic unit is arranged on the top of the flat plate for photovoltaic power generation, the dust detection unit is arranged on the top of the flat plate for detecting dust in the air, the dust removal unit is arranged on the top of the photovoltaic unit for dust removal of the photovoltaic unit, and the maintenance unit is arranged on the top of the photovoltaic unit for maintaining the dust removal unit;

[0010] The protection unit is arranged on the top of the flat plate to protect the dust removal unit. The central processing unit is arranged inside the dust detection unit to receive and process data and control the power devices of the photovoltaic power generation equipment.

[0011] Preferably, a first cylinder is installed on the top of the flat plate, a lifting rod is installed on the output end of the first cylinder, a second bolt is installed through the top of the lifting rod, and a top ring is installed on the outer side of the second bolt.

[0012] Preferably, the photovoltaic unit includes a fixed frame, a first bolt, an upright pole, an adjustment plate, a guide rod, a photovoltaic unit and an inverter. Multiple fixed frames are symmetrically installed on the top of the flat plate, a first bolt is installed through one side of the fixed frame, an upright pole is movably installed through the top of the fixed frame, an adjustment plate is movably installed through a round rod on the inner side of the upright pole, guide rods are symmetrically installed on the bottom of the adjustment plate, a photovoltaic unit is installed on the top of the adjustment plate, and an inverter is installed on the bottom of the adjustment plate.

[0013] Preferably, the dust detection unit includes a box body, a dust sensing unit, a fan and a timing unit. The box body is installed on the top of the flat plate, the dust sensing unit is installed on the top of the box body, the fan is installed on the top of the box body and the fan is located behind the dust sensing unit, and the timing unit is installed inside the box body.

[0014] Preferably, the dust removal unit includes a motor, a screw, a plate body, a block body, a wiping rod, a first brush, a transparent film and a counterweight rod. The motor is installed on the top of the adjusting plate, the screw is installed on the output end of the motor, the plate body is symmetrically installed on the back side of the adjusting plate, the block body is installed on the top of the plate body, and the block body is located on the outside of the screw rod, the wiping rod is installed on the outside of the screw rod, the first brush is installed on the bottom of the wiping rod, the transparent film is installed on the top of the wiping rod, and the counterweight rod is installed on the front side of the transparent film.

[0015] Preferably, the maintenance unit includes a rectangular frame, a second brush, a vertical plate, a second cylinder, a frame body and a cleaning rod. The rectangular frame is installed on the top of the adjustment plate, and the rectangular frame is located on the outside of the transparent film. The second brush is installed on the top inner wall of the rectangular frame, the vertical plate is installed on the bottom of the plate body, the second cylinder is symmetrically installed on the back of the vertical plate, the frame body is installed on the output end of the second cylinder, and a plurality of cleaning rods are installed on the inside of the frame body.

[0016] Preferably, the protection unit includes a sun protection frame, a drainage hole, a long frame, a sun shield, a right-angle plate and a spring. The sun protection frame is movably installed on the top of the flat plate, a drainage hole is provided on the front of the sun protection frame, a long frame is installed on the top of the sun protection frame, a sun shield is movably installed on the inner side of the long frame, a right-angle plate is installed on the top of the long frame, a spring is installed on the bottom of the right-angle plate, and the spring is located above the sun shield.

[0017] Preferably, the central processing unit includes a control unit and a data calculation unit. The control unit is installed inside the box body. The data calculation unit is embedded inside the control unit in the form of code, and can calculate the data received by the control unit and send the calculation results to the control unit.

[0018] Preferably, the method for using the string-type large-scale photovoltaic power generation equipment is as follows:

[0019] S1. First, the time of the day is monitored in hours through the time unit. When the time T>13, the first cylinder drives the top ring to move downward, and then drives the adjustment plate to rotate downward, so that the direction of the photovoltaic unit faces the sun. Otherwise, when T<13, the first cylinder drives the top ring to move upward, and then drives the adjustment plate to rotate upward, so that the direction of the photovoltaic unit faces the sun.

[0020] S2, the dust concentration V1 in the air is monitored by the dust sensing unit, and the concentration information is transmitted to the control unit. When the dust concentration V1 is higher than the set value V0, the timing unit is used to time, and the timing T is transmitted to the control unit. At the same time, the data calculation unit performs V1×T operation. When V1×T>K, K is the set value, and the control unit controls the motor to drive the wiper rod to move forward and backward, so that the first brush cleans the dust on the photovoltaic unit;

[0021] S3, after cleaning is completed, the first brush moves to the rear position, and the second cylinder drives the frame to move forward and backward, so that the cleaning rod scrapes off the dust on the first brush, and then the motor drives the wiping rod to move forward, and the transparent film moves forward under the gravity of the counterweight rod, and the second brush scrapes off the dust on the transparent film, thereby cleaning the transparent film;

[0022] S4, then the transparent film falls into the sun protection frame, the sun protection frame protects the transparent film, and the sun protection plate also protects the transparent film above the adjustment plate.

[0023] Preferably, the step S2 further includes the following steps:

[0024] S21, when the first brush is cleaning the photovoltaic unit, the transparent film covers the photovoltaic unit to prevent dust from falling on the photovoltaic unit during cleaning;

[0025] S22. When the dust concentration V1 is lower than the set value V0, the timing unit is used to count the time, and the timing T is transmitted to the control unit. When T>48h, the motor drives the first brush to clean the photovoltaic unit.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention can detect the dust concentration in the air through the dust sensing unit, and can also estimate the amount of dust accumulation on the photovoltaic unit. After the estimated amount of dust accumulation reaches a set value, the motor can be controlled to drive the first brush to clean the photovoltaic unit, so that the large-scale string photovoltaic power generation equipment can detect and control the dust concentration, and calculate the estimated amount of dust accumulation on the photovoltaic unit. After the calculated amount of accumulation reaches a set value, the motor can be controlled to drive the first brush to clean the photovoltaic unit.

[0028] 2. When the dust on the photovoltaic unit is cleaned by the first brush of the present invention, the photovoltaic unit can be covered by a transparent film to prevent the dust from flying and covering the photovoltaic unit for a second time during cleaning. At the same time, the transparent film can allow light to pass through and shine on the photovoltaic unit, thereby ensuring that the power generation effect of the photovoltaic unit will not be affected. The large-scale string-type photovoltaic power generation equipment can cover the photovoltaic unit through the transparent film to prevent the dust from flying and covering the photovoltaic unit for a second time during cleaning. At the same time, the transparent film can allow light to pass through and shine on the photovoltaic unit.

[0029] 3. The present invention can clean the transparent film moving back and forth through the second brush to prevent the transparent film from being covered with dust and affecting the transparent effect, so that when the transparent film covers the photovoltaic unit, there will be no dust affecting the light irradiation on the photovoltaic unit. At the same time, when the first brush moves to the rear, the second cylinder can drive the cleaning rod to clean the first brush to ensure the cleanliness of the first brush, so that the large-scale string photovoltaic power generation equipment can clean the transparent film moving back and forth through the second brush. At the same time, when the first brush moves to the rear, the second cylinder can drive the cleaning rod to clean the first brush to ensure the cleanliness of the first brush.

[0030] 4. The present invention enables a large-scale string-type photovoltaic power generation device to fall into a sun-proof frame through a photovoltaic connection through a transparent film that falls into a sun-proof frame, and the sun-proof frame protects the transparent film. At the same time, the sun-proof plate also protects the transparent film above the adjustment plate, to prevent the transparent film from being exposed to sunlight for a long time and aging too fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective view of the present invention;

[0032] Figure 2 It is a schematic diagram of the flat plate structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the adjustment plate of the present invention;

[0034] Figure 4 It is a schematic diagram of the transparent film structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the wiper rod of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the sun protection frame of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the first cylinder of the present invention;

[0038] Figure 8 It is a schematic diagram of the box structure of the present invention;

[0039] Fig. 9 It is a side sectional view of the box body of the present invention;

[0040] Fig.10 It is a schematic diagram of the plate structure of the present invention;

[0041] Fig.11 is a control flow chart of the present invention;

[0042] Fig.12 The figure is a flow chart of the method for using the present invention.

[0043] In the figure: 1. flat plate; 2. upright rod; 3. adjustment plate; 4. guide rod; 5. first cylinder; 6. top ring; 7. photovoltaic unit; 8. motor; 9. screw rod; 10. plate body; 11. block body; 12. wiping rod; 13. first brush; 14. transparent film; 15. counterweight rod; 16. rectangular frame; 17. second brush; 18. upright plate; 19. second cylinder; 20. frame body; 21. dust cleaning round rod; 22. sun protection frame; 23. drainage hole; 24. long frame; 25. sun protection plate; 26. right-angle plate; 27. spring; 28. box body; 29. ​​dust sensing unit; 30. fan; 31. time unit; 32. timing unit; 33. fixing frame; 34. first bolt; 35. lifting rod; 36. second bolt; 38. inverter; 39. control unit; 40. data calculation unit. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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.

[0047] See also Figure 1 , Figure 4 and Figure 7 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0048] It includes a flat plate 1, a first cylinder 5 is installed on the top of the flat plate 1, a lifting rod 35 is installed on the output end of the first cylinder 5, a second bolt 36 is installed through the top of the lifting rod 35, and a top ring 6 is installed on the outer side of the second bolt 36. The flat plate 1 can provide an installation position for other components of the equipment so that other components of the equipment have a position to be installed. The first cylinder 5 can convert air pressure energy into kinetic energy, thereby driving the lifting rod 35 to move up and down. The lifting rod 35 can drive the second bolt 36 to move up and down by moving up and down. The second bolt 36 can drive the top ring 6 to move up and down by moving up and down. The top ring 6 can drive the adjustment plate 3 to rotate up and down by moving up and down.

[0049] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0050] The photovoltaic unit includes a photovoltaic unit, which is arranged on the top of the flat plate 1 for photovoltaic power generation. The photovoltaic unit includes a fixing frame 33, a first bolt 34, an upright pole 2, an adjustment plate 3, a guide rod 4, a photovoltaic unit 7 and an inverter 38. A plurality of fixing frames 33 are symmetrically installed on the top of the flat plate 1. The first bolt 34 is installed through one side of the fixing frame 33. The upright pole 2 is movably installed through the top of the fixing frame 33. The adjustment plate 3 is movably installed through the inner side of the upright pole 2 through a round rod. The guide rod 4 is symmetrically installed on the bottom of the adjustment plate 3. The photovoltaic unit 7 is installed on the top of the adjustment plate 3. An inverter 38 is installed at the bottom of the adjustment plate 3, and the fixing frame 33 can provide an installation position for the upright pole 2. The first bolt 34 can squeeze and fix the upright pole 2 by rotating. The upright pole 2 can provide an installation position for the adjustment plate 3. The adjustment plate 3 can drive the photovoltaic unit 7 to adjust the tilt angle by rotating. The guide rod 4 can provide guidance for the top ring 6 and enable the top ring 6 and the adjustment plate 3 to be movably connected. The photovoltaic unit 7 is a photovoltaic power generation panel that can convert light energy into electrical energy. The inverter 38 can convert the direct current generated by the photovoltaic unit 7 into alternating current.

[0051] See also Figure 1 , Figure 2 , Figure 8 and Fig. 9 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0052] The utility model comprises a dust detection unit, which is arranged on the top of the flat plate 1 and is used to detect dust in the air. The dust detection unit comprises a box body 28, a dust sensing unit 29, a fan 30 and a timing unit 32. The box body 28 is installed on the top of the flat plate 1. The dust sensing unit 29 is installed on the top of the box body 28. The fan 30 is installed on the top of the box body 28, and the fan 30 is located behind the dust sensing unit 29. The timing unit 32 is installed inside the box body 28. The box body 28 can provide an installation position for the dust sensing unit 29 so that the dust sensing unit 29 has a position for installation. The dust sensing unit 29 is a dust concentration sensor, which can detect the dust concentration in the air and transmit the dust concentration information to the control unit 39. The fan 30 can convert electrical energy into kinetic energy, thereby accelerating the flow of air and blowing off the dust on the dust sensing unit 29. The timing unit 32 is a timer, which can perform timing.

[0053] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0054] The utility model comprises a dust removal unit, which is arranged on the top of the photovoltaic unit and is used for dust removal of the photovoltaic unit. The dust removal unit comprises a motor 8, a screw 9, a plate body 10, a block body 11, a wiping rod 12, a first brush 13, a transparent film 14 and a counterweight rod 15. The motor 8 is installed on the top of the adjustment plate 3, the screw 9 is installed on the output end of the motor 8, the plate body 10 is symmetrically installed on the back of the adjustment plate 3, the block body 11 is installed on the top of the plate body 10, and the block body 11 is located on the outside of the screw 9, the wiping rod 12 is installed on the outside of the screw 9, the first brush 13 is installed on the bottom of the wiping rod 12, the transparent film 14 is installed on the top of the wiping rod 12, and the front of the transparent film 14 is installed Equipped with a counterweight rod 15, the motor 8 can convert electrical energy into kinetic energy, thereby driving the screw rod 9 to rotate, and the screw rod 9 can drive the wiping rod 12 to move back and forth by rotating. The plate body 10 can provide an installation position for the block body 11, and the block body 11 can provide support for the screw rod 9. The wiping rod 12 can drive the first brush 13 to move back and forth by moving, and the first brush 13 can scrape off the dust on the photovoltaic unit 7 by moving back and forth. The transparent film 14 can prevent the dust raised by the first brush 13 from falling repeatedly on the photovoltaic unit 7 when removing dust. At the same time, the transparent film 14 allows light to pass through, which can prevent dust from affecting the photovoltaic unit 7 from receiving light energy.

[0055] See also Figure 1 , Figure 2 , Figure 4 and Fig.10 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0056] The maintenance unit is provided at the top of the photovoltaic unit and is used for maintaining the dust removal unit. The maintenance unit includes a rectangular frame 16, a second brush 17, a vertical plate 18, a second cylinder 19, a frame body 20 and a cleaning round rod 21. The rectangular frame 16 is installed on the top of the adjustment plate 3, and the rectangular frame 16 is located on the outside of the transparent film 14. The second brush 17 is installed on the top inner wall of the rectangular frame 16. The vertical plate 18 is installed at the bottom of the plate body 10. The second cylinder 19 is symmetrically installed on the back of the vertical plate 18. The frame body 20 is installed on the output end of the second cylinder 19. A plurality of cleaning rods 21 are installed on the inner side of the frame 20. The rectangular frame 16 can provide an installation position for the second brush 17. The second brush 17 can clean the dust on the transparent film 14 moving back and forth. The vertical plate 18 can provide an installation position for the second cylinder 19. The second cylinder 19 can convert air pressure energy into kinetic energy, thereby driving the frame 20 to move back and forth. The frame 20 can drive the cleaning rods 21 to move back and forth by moving back and forth. The cleaning rods 21 can scrape off the dust on the first brush 13 moved upward by moving back and forth.

[0057] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0058] The protective unit is provided on the top of the flat plate 1 to protect the dust removal unit. The protective unit includes a sunscreen frame 22, a drainage hole 23, a long frame 24, a sunscreen plate 25, a right-angle plate 26 and a spring 27. The sunscreen frame 22 is movably installed on the top of the flat plate 1. The front of the sunscreen frame 22 is provided with a drainage hole 23. The top of the sunscreen frame 22 is provided with a long frame 24. The inner side of the long frame 24 is provided with a sunscreen plate 25 movably installed. The top of the long frame 24 is provided with a right-angle plate 26. A spring 27 is installed at the bottom of the right-angle plate 26, and the spring 27 is located above the sunscreen 25. The sunscreen frame 22 can provide a storage space for the transparent film 14, and at the same time can prevent the transparent film 14 from being aged due to long-term exposure to sunlight. The drainage hole 23 can drain the water inside the sunscreen frame 22. The long frame 24 can provide an installation position for the sunscreen 25. The sunscreen 25 prevents the transparent film 14 above the adjustment plate 3 from being exposed to sunlight, thereby preventing the transparent film 14 from being aged due to long-term exposure to sunlight.

[0059] See also Figure 1 , Fig. 9 and Fig.11 , an embodiment provided by the present invention: a large-scale string photovoltaic power generation equipment;

[0060] The central processing unit includes a central processing unit, which is arranged inside the dust detection unit and can receive and process data and control the power device of the photovoltaic power generation equipment. The central processing unit includes a control unit 39 and a data calculation unit 40. The control unit 39 is installed inside the box body 28. The data calculation unit 40 is embedded in the control unit 39 in the form of code, and can calculate the data received by the control unit 39 and send the calculation result to the control unit 39. The control unit 39 is connected with the first cylinder 5, the motor 8, the second cylinder 19, the dust sensing unit 29, the fan 30, the time unit 31, the timing unit 32 and the inverter 38 by electrical signals, and can receive information from the dust sensing unit 29, the time unit 31 and the timing unit 32, and control the first cylinder 5, the motor 8, the second cylinder 19 and the fan 30 at the same time. The data calculation unit 40 plays a role of calculation and judgment, and can calculate the data of the dust sensing unit 29, the time unit 31 and the timing unit 32.

[0061] The use of string-type large-scale photovoltaic power generation equipment is as follows:

[0062] S1. First, the time of the day is monitored in hours by the time unit 31. When the time T>13, the first cylinder 5 drives the top ring 6 to move upward or downward, and then drives the adjustment plate 3 to rotate upward or downward, so that the photovoltaic unit 7 is facing the sun;

[0063] S2, the dust concentration V1 in the air is monitored by the dust sensing unit 29, and the concentration information is transmitted to the control unit 39. When the dust concentration V1 is higher than the set value V0, the timing unit 32 is used to perform timing, and the timing T is transmitted to the control unit 39. At the same time, the data calculation unit 40 performs the V1×T operation. When V1×T>K, K is the set value, and the control unit 39 controls the motor 8 to drive the wiper rod 12 to move forward and backward, so that the first brush 13 cleans the dust on the photovoltaic unit 7;

[0064] S3, after cleaning is completed, the first brush 13 moves to the rear position, and the second cylinder 19 drives the frame 20 to move forward and backward, so that the cleaning rod 21 scrapes off the dust on the first brush 13, and then the motor 8 drives the wiping rod 12 to move forward, and the transparent film 14 moves forward under the gravity of the counterweight rod 15, and the second brush 17 scrapes off the dust on the transparent film 14, thereby cleaning the transparent film 14;

[0065] S4, then the transparent film 14 falls into the sun protection frame 22, the sun protection frame 22 protects the transparent film 14, and the sun protection plate 25 also protects the transparent film 14 above the adjustment plate 3.

[0066] S2 also includes the following steps:

[0067] S21, when the first brush 13 cleans the photovoltaic unit 7, the transparent film 14 covers the photovoltaic unit 7 to prevent dust from falling on the photovoltaic unit 7 during cleaning;

[0068] S22. When the dust concentration V1 is lower than the set value V0, the timing unit 32 is used to count the time, and the timing T is transmitted to the control unit 39. When T>48h, the motor 8 drives the first brush 13 to clean the photovoltaic unit 7.

[0069] Working principle: Before using a large-scale string-type photovoltaic power generation device, you should first check whether the large-scale string-type photovoltaic power generation device has any problems that affect its use. First, the time unit 31 is used to monitor the time of the day in hours. When the time T>13, the first cylinder 5 drives the top ring 6 to move upward or downward, and then drives the adjustment plate 3 to rotate upward or downward, so that the direction of the photovoltaic unit 7 faces the sun. The dust concentration V1 in the air is monitored by the dust sensing unit 29, and the concentration information is transmitted to the control unit 39. When the dust concentration V1 is higher than the set value V0, the timing unit 32 is used to time, and the timing T is transmitted to the control unit 39. At the same time, the data calculation unit 40 performs V1×T operation. When V1×T>K, K is the set value, and the control unit 39 controls the motor 8 to drive the wiping rod 12 to move back and forth, so that the first brush 13 cleans the dust on the photovoltaic unit 7. When the dust concentration V1 is lower than the set value V0, the dust concentration V1 in the air is monitored by the dust sensing unit 29, and the concentration information is transmitted to the control unit 39. When the dust concentration V1 is higher than the set value V0, the timing unit 32 is used to time, and the timing T is transmitted to the control unit 39. At the same time, the data calculation unit 40 performs V1×T operation. When V1×T>K, K is the set value, and the control unit 39 controls the motor 8 to drive the wiping rod 12 to move back and forth, so that the first brush 13 cleans the dust on the photovoltaic unit 7. At the set value V0, timing is performed through the timing unit 32, and the timing T is transmitted to the control unit 39. When T>48h, the motor 8 drives the first brush 13 to clean the photovoltaic cell 7. When the first brush 13 cleans the photovoltaic cell 7, the transparent film 14 covers the photovoltaic cell 7 to prevent dust from falling on the photovoltaic cell 7 during cleaning. After cleaning, the first brush 13 moves to the rear position, and the second cylinder 19 drives the frame 20 to move forward and backward, so that the cleaning rod 21 scrapes off the dust on the first brush 13. Then the motor 8 drives the wiping rod 12 to move forward, and the transparent film 14 moves forward under the gravity of the counterweight rod 15. The second brush 17 scrapes off the dust on the transparent film 14, thereby cleaning the transparent film 14. Then the transparent film 14 falls into the sun protection frame 22, and the sun protection frame 22 protects the transparent film 14. At the same time, the sun protection plate 25 also protects the transparent film 14 above the adjustment plate 3.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference signs in the claims should not be regarded as limiting the rights involved.

Claims

1. A large-scale string photovoltaic power generation device, characterized in that: The device comprises a flat plate (1), a photovoltaic unit, a dust detection unit, a dust removal unit, a maintenance unit, a protection unit and a central processing unit, wherein the photovoltaic unit is arranged on the top of the flat plate (1) and is used for photovoltaic power generation, the dust detection unit is arranged on the top of the flat plate (1) and is used for detecting dust in the air, the dust removal unit is arranged on the top of the photovoltaic unit and is used for dust removal of the photovoltaic unit, and the maintenance unit is arranged on the top of the photovoltaic unit and is used for maintaining the dust removal unit; The protection unit is arranged on the top of the flat plate (1) to protect the dust removal unit, and the central processing unit is arranged inside the dust detection unit to receive and process data and control the power device of the photovoltaic power generation equipment; The dust detection unit comprises a box body (28), a dust sensing unit (29), a fan (30) and a timing unit (32); the box body (28) is mounted on the top of the flat plate (1); the dust sensing unit (29) is mounted on the top of the box body (28); the fan (30) is mounted on the top of the box body (28), and the fan (30) is located behind the dust sensing unit (29); and the timing unit (32) is mounted inside the box body (28); The dust removal unit comprises a motor (8), a screw (9), a plate (10), a block (11), a wiping rod (12), a first brush (13), a transparent film (14) and a counterweight rod (15); the motor (8) is mounted on the top of the adjustment plate (3); the screw (9) is mounted on the output end of the motor (8); the plate (10) is symmetrically mounted on the back of the adjustment plate (3); the block (11) is mounted on the top of the plate (10), and the block (11) is located on the outside of the screw (9); the wiping rod (12) is mounted on the outside of the screw (9); the first brush (13) is mounted on the bottom of the wiping rod (12); the transparent film (14) is mounted on the top of the wiping rod (12); and the counterweight rod (15) is mounted on the front of the transparent film (14); The maintenance unit comprises a rectangular frame (16), a second brush (17), a vertical plate (18), a second cylinder (19), a frame body (20) and a cleaning round rod (21); the rectangular frame (16) is mounted on the top of the adjustment plate (3), and the rectangular frame (16) is located on the outside of the transparent film (14); the second brush (17) is mounted on the top inner wall of the rectangular frame (16); the vertical plate (18) is mounted on the bottom of the plate body (10); the second cylinder (19) is symmetrically mounted on the back of the vertical plate (18); the frame body (20) is mounted on the output end of the second cylinder (19); and a plurality of cleaning round rods (21) are mounted on the inner side of the frame body (20); The protection unit comprises a sun protection frame (22), a drainage hole (23), a long frame (24), a sun protection board (25), a right-angle plate (26) and a spring (27); the sun protection frame (22) is movably installed on the top of the flat plate (1); a drainage hole (23) is provided on the front of the sun protection frame (22); a long frame (24) is installed on the top of the sun protection frame (22); a sun protection board (25) is movably installed on the inner side of the long frame (24); a right-angle plate (26) is installed on the top of the long frame (24); a spring (27) is installed on the bottom of the right-angle plate (26); and the spring (27) is located above the sun protection board (25).

2. A large-scale string photovoltaic power generation device according to claim 1, characterized in that: A first cylinder (5) is installed on the top of the plate (1), a lifting rod (35) is installed on the output end of the first cylinder (5), a second bolt (36) is installed through the top of the lifting rod (35), and a top ring (6) is installed on the outer side of the second bolt (36).

3. A large-scale string photovoltaic power generation device according to claim 2, characterized in that: The photovoltaic unit comprises a fixing frame (33), a first bolt (34), an upright pole (2), an adjustment plate (3), a guide rod (4), a photovoltaic unit (7) and an inverter (38); a plurality of fixing frames (33) are symmetrically mounted on the top of the flat plate (1); a first bolt (34) is installed through one side of the fixing frame (33); an upright pole (2) is movably installed through the top of the fixing frame (33); an adjustment plate (3) is movably installed through a round rod on the inner side of the upright pole (2); a guide rod (4) is symmetrically installed on the bottom of the adjustment plate (3); a photovoltaic unit (7) is installed on the top of the adjustment plate (3); and an inverter (38) is installed on the bottom of the adjustment plate (3).

4. A large-scale string photovoltaic power generation device according to claim 3, characterized in that: The central processing unit comprises a control unit (39) and a data calculation unit (40); the control unit (39) is installed inside the box body (28); the data calculation unit (40) is embedded inside the control unit (39) in the form of code, and is capable of calculating data received by the control unit (39) and sending the calculation result to the control unit (39).

5. A method for using a large-scale string photovoltaic power generation device according to any one of claims 1 to 4, characterized in that: The method of using the string-type large-scale photovoltaic power generation equipment is as follows: S1. First, the time of the day is monitored in hours by using the time unit (31). When the time T>13, the first cylinder (5) drives the top ring (6) to move upward or downward, thereby driving the adjustment plate (3) to rotate upward or downward, so that the photovoltaic unit (7) is directed toward the sun; S2, monitoring the dust concentration in the air through the dust sensing unit (29), and transmitting the concentration information to the control unit (39); when the dust concentration is higher than the set value, timing is performed through the timing unit (32), and the timing T is transmitted to the control unit (39); at the same time, the data calculation unit (40) performs ×T operation; when ×T>K, K is the set value, and the control unit (39) controls the motor (8) to drive the wiping rod (12) to move forward and backward, thereby causing the first brush (13) to clean the dust on the photovoltaic unit (7); S3, after the cleaning is completed, the first brush (13) moves to the rear position, and the second cylinder (19) drives the frame (20) to move forward and backward, so that the cleaning rod (21) scrapes off the dust on the first brush (13), and then the motor (8) drives the wiping rod (12) to move forward, and the transparent film (14) moves forward under the gravity of the counterweight rod (15), and the second brush (17) scrapes off the dust on the transparent film (14), thereby cleaning the transparent film (14); S4, the transparent film (14) then falls into the interior of the sun protection frame (22), the sun protection frame (22) protects the transparent film (14), and at the same time the sun protection plate (25) also protects the transparent film (14) above the adjustment plate (3).

6. The method for using a large-scale string photovoltaic power generation device according to claim 5, characterized in that: The step S2 also includes the following steps: S21, when the first brush (13) is cleaning the photovoltaic unit (7), the transparent film (14) covers the photovoltaic unit (7) to prevent dust from falling on the photovoltaic unit (7) during cleaning; S22. When the dust concentration is lower than the set value, the timing unit (32) is used to measure the time, and the time T is transmitted to the control unit (39). When T>48h, the motor (8) drives the first brush (13) to clean the photovoltaic unit (7).

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