Cleaning equipment for photovoltaic self-cleaning

Abstract

The invention discloses cleaning equipment for photovoltaic self-cleaning, which belongs to the technical field of photovoltaic engineering and comprises a spraying assembly, a plurality of cleaning brushes and a recycling assembly. The spraying assembly is used for spraying cleaning liquid. The multiple cleaning brushes are arranged in the transverse direction of the cleaning equipment. The recycling assembly comprises a plurality of centrifugal brushes and a collecting cavity, the centrifugal brushes are arranged in the transverse direction of the cleaning equipment, the centrifugal brushes are arranged between the cleaning brush and the collecting cavity, the centrifugal brushes can rotate relative to the rotating shaft, and an included angle of 40-80 degrees is formed between the rotating shaft and the photovoltaic panel. After the spraying assembly sprays the cleaning liquid, the surface of the photovoltaic panel is cleaned through the cleaning brush, and dust and sand on the surface are removed. In the continuous advancing process of the cleaning equipment, the centrifugal brush located behind the cleaning brush rotates at a high speed, and when the centrifugal brush makes contact with the cleaning fluid on the surface of the photovoltaic panel, the cleaning fluid is guided to the collecting cavity to be collected through the scraping and centrifuging effects.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic engineering, and in particular relates to a cleaning device for photovoltaic self-cleaning. Background Art

[0002] As a new type of photovoltaic power generation model, mountain photovoltaic power stations make full use of mountain land resources and install photovoltaic panels on mountains or slopes. This not only solves the problem of tight land resources, but also provides a reliable power supply for remote areas, which is of great significance to reducing the use of traditional energy and reducing carbon emissions.

[0003] However, the construction and operation of mountain photovoltaic power stations also face many challenges. Due to the complex mountain terrain, photovoltaic panels are usually installed at a higher location, close to the top of the mountain or on a slope. These areas are more susceptible to natural conditions such as wind, sand, and dry weather. Dry air and strong winds can easily bring pollutants such as dust and sand to the surface of photovoltaic panels, forming a dust layer. Dust accumulation will significantly reduce the light absorption efficiency of photovoltaic panels, resulting in a decrease in power generation. Dust accumulation on the surface of photovoltaic panels can reduce power generation efficiency by 10%-30%, and in severe cases, it can even reach more than 50%.

[0004] Common methods for cleaning photovoltaic panels include manual cleaning and mechanical cleaning. Although manual cleaning is simple and direct, it is inefficient, has high labor costs, and poses safety hazards in mountainous environments. Therefore, mechanical automatic cleaning systems have gradually become the first choice for photovoltaic equipment maintenance. Cleaning robots spray cleaning liquid on the surface of photovoltaic panels and use brushes to deepen the cleaning effect, achieving semi-automatic or fully automatic cleaning. However, mountain photovoltaic power stations are usually located in remote areas with scarce water resources. A large amount of cleaning water cannot be recycled, resulting in high cleaning costs. And although the detergent used for cleaning can improve the cleaning effect, the chemical components in the detergent may pollute the surrounding soil and water, further exacerbating environmental problems.

[0005] Some photovoltaic power stations use a water collection pipe at the bottom of the slope of the photovoltaic panel to collect the cleaning liquid, and collect the cleaning liquid through the pipe to the treatment pool for treatment. However, this requires the construction of a large number of network pipes in the mountainous environment, and the engineering cost is extremely high. In addition, sand and dust entering the pipes are prone to blockage. If it rains, a large amount of rainwater will gather in the treatment pool, which will cause a surge in the operating pressure of the treatment pool. Summary of the invention

[0006] The purpose of the present invention is to provide a cleaning device for photovoltaic self-cleaning to solve the problems raised in the above-mentioned prior art.

[0007] Provided is a cleaning device for photovoltaic self-cleaning, comprising:

[0008] A spray assembly, which is used to spray cleaning fluid;

[0009] A plurality of cleaning brushes, wherein the plurality of cleaning brushes are arranged in a transverse direction of the cleaning device;

[0010] The recovery component includes a plurality of centrifugal brushes and a collecting chamber. The plurality of centrifugal brushes are arranged laterally along the cleaning device. The centrifugal brushes are arranged between the cleaning brushes and the collecting chamber. The centrifugal brushes can rotate relative to the rotating shaft and form an angle of 40° to 80° between the rotating shaft and the photovoltaic panel.

[0011] As a further embodiment of the present invention: the centrifugal brush can rotate relative to the rotating shaft and an angle of 55° to 65° is formed between the rotating shaft and the photovoltaic panel.

[0012] As a further embodiment of the present invention: taking the two lateral side walls of the cleaning device as the object, there are at least two centrifugal brushes adjacent to any side wall, and the linear speed direction of the contact point between the centrifugal brush and the photovoltaic panel points to the central axis of the cleaning device.

[0013] The centrifugal brushes located on both sides of the cleaning equipment have a linear velocity direction at the contact point between the centrifugal brushes and the photovoltaic panel pointing to the central axis, forming a centripetal motion trend. When the centrifugal brushes rotate, the cleaning liquid on both sides is thrown toward the middle instead of splashing to the outside of the equipment, preventing the cleaning liquid from escaping to both sides of the equipment and ensuring that the liquid is gathered in the collection chamber in the middle, thereby improving the recovery rate. This reduces liquid residue in the edge area and avoids secondary contamination of the photovoltaic panel surface.

[0014] As a further embodiment of the present invention: a receiving plate is provided at the bottom of the collecting chamber, and the receiving plate extends to the bottom position of the rotating shaft of the centrifugal brush.

[0015] The receiving plate extends to the bottom of the centrifugal brush rotating shaft, covering the area below the centrifugal brush liquid throwing path. When the centrifugal brush throws out liquid, the receiving plate directly receives the splashing droplets and guides the liquid to the collection chamber through the inclined design. This improves the liquid receiving efficiency of the collection chamber and reduces the subsequent processing pressure.

[0016] As a further embodiment of the present invention: it also includes an air compressor and a guide cavity, the air compressor is connected to the guide cavity, and the guide cavity is formed on a side of the receiving plate away from the centrifugal brush.

[0017] The compressed air generated by the air compressor forms a directional airflow through the guide cavity, and blows from the bottom of the receiving plate to the surface of the photovoltaic panel, so that the cleaning liquid on the surface of the photovoltaic panel is blocked in front of the receiving plate and will not leak backwards, thereby increasing the separation rate of the cleaning liquid on the surface of the photovoltaic panel. At the same time, the compressed air has a certain drying effect, which prevents new dust and sand from adhering to the photovoltaic panel through the wet surface after cleaning.

[0018] As a further embodiment of the present invention: the centrifugal brush includes a fixed part, a plurality of flexible cloth strips and a plurality of flexible rubber hoses, a plurality of the flexible cloth strips are fixedly connected to the fixed part, a plurality of the flexible rubber hoses are fixedly connected to the fixed part and are sleeved on the outer periphery of the corresponding flexible cloth strips, and the length of the flexible cloth strips is greater than that of the flexible rubber hoses.

[0019] The flexible hose is set on the outer periphery of the flexible cloth strip to provide support and protection, and to orient each flexible cloth strip so that the centrifugal brush forms a rotation area with a characteristic angle distribution after rotation. The length of the flexible cloth strip is longer than the hose, so that the end of the flexible cloth strip can be bent freely, enhancing the fit with the surface of the photovoltaic panel. Since the bendable section of the flexible cloth strip is limited in length, it can prevent the flexible cloth strips in the same centrifugal brush and the flexible cloth strips of adjacent centrifugal brushes from getting entangled and knotted. The hose limits excessive deformation of the cloth strip to avoid loose structure due to high-speed rotation.

[0020] As a further embodiment of the present invention: it also includes a driving mechanism, which includes a motor, a first transmission rod, a plurality of first bevel gears, a plurality of second bevel gears and a plurality of flexible shafts, the motor is used to drive the first transmission rod to rotate, the plurality of first bevel gears are arranged along the length direction of the transmission rod, the plurality of second bevel gears are meshed with the corresponding first bevel gears, and the centrifugal brush is connected to the corresponding second bevel gears through a flexible shaft transmission.

[0021] The motor drives multiple first bevel gears through the first transmission rod, and after the power direction is converted by the second bevel gear, it is transmitted to the centrifugal brush through the flexible shaft. The flexible shaft is flexible and can adapt to the dynamic changes of the centrifugal brush inclination angle. A single motor drives multiple centrifugal brushes, which simplifies the power system structure and reduces energy consumption. The flexible shaft design allows the centrifugal brush to work stably at different inclination angles and adapt to the slope changes of mountain photovoltaic panels.

[0022] As a further embodiment of the present invention: it also includes an adjusting mechanism, which includes a second transmission rod, a plurality of sleeve rods, a plurality of traction rods and a plurality of traction mechanisms, the plurality of traction mechanisms are arranged along the length direction of the second transmission rod, the traction rod is hinged to the sleeve rod, the flexible shaft passes through the sleeve rod and the interior of the traction rod in turn and is rotatably connected to the traction rod, and the second transmission rod and the traction rod are transmission-connected via a corresponding traction mechanism.

[0023] The adjustment mechanism drives each traction mechanism through the second transmission rod, and changes the articulation angle between the traction rod and the sleeve rod through the transmission action of the traction mechanism, thereby adjusting the inclination angle of the flexible shaft. The traction rod is rotatably connected to the flexible shaft to ensure that power transmission is not affected by the angle adjustment. The inclination angle of the centrifugal brush is dynamically adjusted to adapt to photovoltaic panels with different installation inclination angles (such as differences in mountain slopes). Maintain the best contact state between the centrifugal brush and the surface of the photovoltaic panel to optimize the scraping and liquid throwing effects.

[0024] As a further embodiment of the present invention: the traction mechanism includes a turntable, a first connection point, a second connection point, a first traction rope and a second traction rope, the first connection point and the second connection point are arranged along the circumference of the turntable, the first traction rope passes through the sleeve rod and the two ends are respectively fixedly connected to the traction rod and the first connection point, the second traction rope passes through the sleeve rod and the two ends are respectively fixedly connected to the traction rod and the second connection point.

[0025] When the turntable rotates, the first connection point and the second connection point change with the circumferential position, and the inclination angle of the traction rod is changed by the retraction and release of the first traction rope and the second traction rope. The centrifugal brush angle can be precisely adjusted to meet the needs of photovoltaic panel installation under complex terrain. The traction rope transmission structure is compact, which reduces space occupation and is suitable for the internal layout of small equipment.

[0026] As a further embodiment of the present invention: the side wall of the collection chamber is connected to the outside of the cleaning device with a drainage hose, and the drainage hose is provided with a drainage pump. The drainage hose can be connected to the collection device to discharge and collect the cleaning liquid collected by the cleaning device in time through the drainage pump to avoid excessive accumulation and backflow overflow.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. After the spray assembly sprays the cleaning liquid, the surface of the photovoltaic panel is cleaned by the cleaning brush to remove the dust and sand on the surface. During the continuous movement of the cleaning equipment, the centrifugal brush located behind the cleaning brush rotates at high speed. When the centrifugal brush contacts the cleaning liquid on the surface of the photovoltaic panel, it guides the cleaning liquid to the collection chamber through scraping and centrifugal action.

[0029] 2. Since there is a certain angle between the rotating axis of the centrifugal brush and the photovoltaic panel, there are partial contact areas and non-contact areas between the centrifugal brush and the photovoltaic panel. The centrifugal brush in the contact part forms a dense area that can scrape the cleaning liquid from the surface of the photovoltaic panel, and the centrifugal brush in the non-contact part generates centrifugal force for the cleaning liquid attached to it due to the rotation effect and is then thrown into the collection chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the overall structure of the cleaning device provided by the present invention;

[0032] Figure 2A schematic diagram of the internal structure of the cleaning device provided by the present invention;

[0033] Figure 3 A schematic diagram of the structure of the centrifugal brush provided by the present invention;

[0034] Figure 4 A schematic diagram of the overall structure of the driving mechanism and the adjusting mechanism provided by the present invention;

[0035] Figure 5 This is a partial structural schematic diagram of the driving mechanism and the adjusting mechanism provided by the present invention.

[0036] In the figure: 1. spray assembly; 2. cleaning brush; 3. recovery assembly; 31. centrifugal brush; 311. fixing part; 312. flexible cloth strip; 313. flexible hose; 32. collecting chamber; 33. receiving plate; 41. air compressor; 42. guide chamber; 5. driving mechanism; 51. motor; 52. first transmission rod; 53. first bevel gear; 54. second bevel gear; 55. flexible shaft; 6. adjusting mechanism; 61. second transmission rod; 62. sleeve rod; 63. traction rod; 64. traction mechanism; 641. turntable; 642. first connection point; 643. second connection point; 644. first traction rope; 645. second traction rope. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0038] Obviously, the drawings described below are only some examples or embodiments of the present invention. For ordinary technicians in this field, the present invention can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed by the present invention, some changes in design, manufacturing or production based on the technical content disclosed by the present invention are just conventional technical means, and should not be understood as insufficient content disclosed by the present invention.

[0039] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present invention and are not intended to limit the subject matter described in the claims.

[0040] See also Figure 1-Figure 3 As shown, the cleaning device for photovoltaic self-cleaning in the embodiment of the present invention includes a spray component 1, a plurality of cleaning brushes 2 and a recovery component 3. The spray component 1 is used to spray the cleaning liquid. The plurality of cleaning brushes 2 are arranged horizontally along the cleaning device. The recovery component 3 includes a plurality of centrifugal brushes 31 and a collection chamber 32. The plurality of centrifugal brushes 31 are arranged horizontally along the cleaning device. The centrifugal brushes 31 are arranged between the cleaning brushes 2 and the collection chamber 32. The centrifugal brushes 31 can rotate relative to the rotation axis and form an angle of α degrees between the rotation axis and the photovoltaic panel, and the angle α is 40° to 80°.

[0041] The spray assembly 1 is composed of a high-pressure water pump and a nozzle array, which are arranged horizontally along the equipment to spray cleaning liquid to cover the surface of the photovoltaic panel. The cleaning liquid is sprayed by the spray assembly 1 to wet the surface of the photovoltaic panel. The cleaning brush 2 is arranged horizontally to cover the width of the photovoltaic panel, and the dust is removed by mechanical friction. The centrifugal brush 31 is located behind the cleaning brush 2. The rotation axis of the centrifugal brush 31 is at an angle of 40° to 80° with the photovoltaic panel, so that the centrifugal brush 31 forms a contact area and a non-contact area with the surface of the photovoltaic panel. The bristles of the centrifugal brush 31 and the photovoltaic panel are closely arranged to form a dense area. The contact area uses the density of the brush to scrape off the liquid, and the non-contact area uses the centrifugal force generated by high-speed rotation to throw the liquid to the collection chamber 32. The angle design optimizes the scraping and throwing functions of the centrifugal brush 31, realizes the efficient recovery of the cleaning liquid, and reduces the waste of water resources. In addition, under the inclined arrangement of the photovoltaic panel, the cleaning equipment can optimize the parabolic form through the influence of the gravity factor of the cleaning liquid itself, and has a better collection effect.

[0042] It should be noted that the lateral direction referred to in the present invention is perpendicular to the cleaning direction of the cleaning device, and the central axis of the cleaning device is parallel to the cleaning direction.

[0043] In one embodiment, the bristle structure of the centrifugal brush 31 is truncated cone-shaped as a whole, and the bristles form a distribution area of ​​40° to 70° relative to the rotation axis, and the brush surface of the centrifugal brush 31 is arranged away from the cleaning brush 2. This structure allows the tip of the contact area to face the water-facing surface when the centrifugal brush 31 rotates, and the smaller water-facing area is more conducive to the cleaning liquid being separated from the surface of the photovoltaic panel, and the separated cleaning liquid is guided toward the central rotation axis of the centrifugal brush 31. In addition, the bristles of the centrifugal brush 31 are facing the collection chamber 32 as a whole, and the cleaning liquid attached to the bristles has a tendency to be thrown toward the collection chamber 32 under the combined force of centrifugal force and gravity when the bristles rotate. When the angle between the bristles and the rotation axis is too small, the centrifugal force generated by the rotation of the bristles is insufficient.

[0044] When the angle between the rotation axis of the centrifugal brush 31 and the photovoltaic panel is less than 40°, the contact angle between the bristles and the surface of the photovoltaic panel is too large, and it is not easy to form a tip contact area facing the water surface. When the angle between the rotation axis of the centrifugal brush 31 and the photovoltaic panel is greater than 80°, the direction of the centrifugal force generated by the rotation of the bristles is more inclined to the surface of the photovoltaic panel, and there is insufficient power to throw the cleaning liquid into the collection chamber 32. The angle formed between the rotation axis of the centrifugal brush 31 and the photovoltaic panel is preferably 55° to 65°, so that the bristles have a better force form, reduce the wear of the bristles, increase the service life, and at the same time make the cleaning liquid have a better throwing parabola.

[0045] Two centrifugal brushes 31 are arranged on both sides of the cleaning device, and the rotation direction of the centrifugal brushes 31 is set to be centripetal, that is, the linear velocity direction points to the central axis of the device. With this setting, when the centrifugal brushes 31 rotate, the cleaning liquid in the edge area is thrown toward the middle of the device instead of splashing outward. It is further explained that when the centrifugal brushes 31 come into contact with the photovoltaic panel, the cleaning liquid adheres to the centrifugal brushes 31, and under the action of centrifugal force, most of the cleaning liquid will be thrown in the linear velocity direction, which can effectively avoid the residual cleaning liquid in the edge area.

[0046] The receiving plate 33 is a bent plate extending below the rotating shaft of the centrifugal brush 31 and connected to the collecting chamber 32, and there is an arc transition between the receiving plate 33 and the collecting chamber 32. After the liquid droplets thrown out by the centrifugal brush 31 hit the receiving plate 33, they slide into the collecting chamber 32 along the arc surface. The receiving plate 33 covers the liquid throwing track and guides the liquid flow by gravity. The liquid collected by the collecting chamber 32 is pumped into the storage chamber or into an external box by a water pump.

[0047] For further information, see Figure 2As shown, the cleaning device also includes an air compressor 41 and a guide cavity 42. The air compressor 41 is connected to the guide cavity 42. The outlet of the guide cavity 42 is located behind the receiving plate 33, forming a downwardly inclined airflow that is led out from the bottom of the receiving plate 33. The compressed air sweeps the residual droplets on the surface of the photovoltaic panel, and the airflow forms an air curtain to prevent the liquid from leaking backwards. The wind assists the liquid removal and surface drying. This structure can improve the separation rate of the cleaning liquid, shorten the surface drying time, and reduce secondary dust accumulation.

[0048] See also Figure 2 and Figure 3 As shown, the centrifugal brush 31 includes a fixed portion 311, a plurality of flexible cloth strips 312 and a plurality of flexible hoses 313. The fixed portion 311 is used to fix the flexible cloth strips 312 and the flexible hoses 313, and the fixed portion 311 is fixed by a rotating shaft and driven to rotate by the rotating shaft. The flexible cloth strips 312 are made of fine fibers and provide capillary liquid absorption ability. The flexible cloth strips 312 are wrapped with flexible hoses 313, and the flexible hoses 313 limit the deformation of the roots of the flexible cloth strips 312 and control the distribution angle of the bristles after the centrifugal brush 31 is rotated. The ends of the flexible cloth strips 312 are free to bend and fit the surface of the photovoltaic panel. The flexible hoses 313 have a certain deformation ability, which provides a certain rigid support for the flexible cloth strips 312 to prevent the flexible cloth strips 312 from being entangled with each other.

[0049] See also Figure 2 , Figure 4 and Figure 5 As shown, the cleaning device also includes a driving mechanism 5, which includes a motor 51, a first transmission rod 52, a plurality of first bevel gears 53, a plurality of second bevel gears 54, and a plurality of flexible shafts 55. The output shaft of the motor 51 is fixedly connected to one end of the first transmission rod 52 for driving the first transmission rod 52 to rotate. The plurality of first bevel gears 53 are arranged along the length direction of the first transmission rod 52, and each first bevel gear 53 drives the corresponding centrifugal brush 31 to rotate. The plurality of second bevel gears 54 are meshed with the corresponding first bevel gears 53, and the centrifugal brush 31 is connected to the corresponding second bevel gears 54 through a flexible shaft 55.

[0050] A single motor 51 drives the first transmission rod 52, which is connected to a plurality of flexible shafts 55 through a bevel gear set to achieve power distribution. The power of the motor 51 is converted by 90 degrees through the first bevel gear 53 and the second bevel gear 54, and the flexible shaft 55 transmits the rotation torque to the inclined centrifugal brush 31.

[0051] The cleaning device further includes an adjustment mechanism 6, which includes a second transmission rod 61, a plurality of sleeve rods 62, a plurality of traction rods 63 and a plurality of traction mechanisms 64. The plurality of traction mechanisms 64 are arranged along the length direction of the second transmission rod 61, the traction rod 63 is hinged with the sleeve rod 62, the flexible shaft 55 passes through the sleeve rod 62 and the traction rod 63 in turn and is rotatably connected with the traction rod 63, and the second transmission rod 61 and the traction rod 63 are transmission-connected through the corresponding traction mechanism 64.

[0052] Since the photovoltaic panel needs to select the tilt angle according to the local lighting conditions and terrain distribution, the parabola of the cleaning liquid thrown out will be affected by gravity and will produce deviations. Therefore, the adjustment mechanism 6 is required to adjust the tilt angle of the centrifugal brush 31 to adjust the optimal parabola. The second transmission rod 61 is a rigid rod arranged horizontally, which can be driven and controlled by the actuator or manually rotated. The second transmission rod 61 drives several traction mechanisms 64 to rotate to achieve power diversion. The sleeve rod 62 is a hollow rod fixed on the equipment frame, which is in a static state to maintain the basic shape of the flexible shaft 55. The flexible shaft 55 penetrates from the inside of the sleeve rod 62, enters the inside of the traction rod 63 through the hinge point, and the end is connected to the rotating shaft of the centrifugal brush 31. The traction mechanism 64 triggers the transmission by rotation, so that the traction rod 63 rotates a certain angle relative to the sleeve rod 62, and the traction rod 63 is fixed to the centrifugal brush 31 to adjust the tilt angle of the centrifugal brush 31. The flexible shaft 55 and the traction rod 63 are connected by a bearing, so that the angle of the traction rod 63 does not interfere with the normal transmission of the flexible shaft 55.

[0053] Specifically, the traction mechanism 64 includes a rotary disk 641, a first connection point 642, a second connection point 643, a first traction rope 644 and a second traction rope 645. The rotary disk 641 is a circular rotary disk, the center of which is fixed on the second transmission rod 61 and rotates synchronously with the second transmission rod 61. The first connection point 642 and the second connection point 643 are respectively located at two positions in the circumferential direction of the rotary disk 641. The first traction rope 644 is connected to the first connection point 642 on the rotary disk 641, and the second traction rope 645 is connected to the second connection point 643 on the rotary disk 641. The first traction rope 644 and the second traction rope 645 are separated by a hinge point on the rotary disk 641. After the traction rope is drawn out from the rotary disk 641, it passes through the hollow channel inside the sleeve rod 62 and is finally fixed to the corresponding anchor point of the traction rod 63. The space where the traction rope is located in the sleeve rod 62 is separated from the space where the flexible shaft 55 is located in the sleeve rod 62 to avoid mutual interference.

[0054] In a specific embodiment, when the second transmission rod 61 rotates, it drives the rotary disk 641 to rotate synchronously. When the rotary disk 641 rotates, the first connection point 642 moves away from the sleeve rod 62, and the second connection point 643 moves toward the sleeve rod 62. The first traction rope 644 moves outward around the center of the rotary disk 641 along with the first connection point 642, and the rope body is tightened. The second traction rope 645 moves inward along with the second connection point 643, and the rope body is relaxed, releasing the redundant length. At this time, the traction rod 63 can rotate toward the force direction of the first traction rope 644 as the first traction rope 644 is pulled, and the angle swing is achieved. When the traction rod 63 swings, the soft shaft 55 inside the traction rod 63 deflects accordingly, driving the angle of the rotation axis of the centrifugal brush 31 to change. The rotary disk 641 acts as a differential wheel, and the single-degree-of-freedom swing of the traction rod 63 is achieved through the difference in the retraction and release of the double traction ropes.

[0055] Furthermore, the flexible shaft 55 and the second bevel gear 54 are connected via an elastic coupling, which is used to compensate for the force change on the flexible shaft 55 caused by the deflection of the traction rod 63, thereby preventing the flexible shaft 55 from being overstretched.

[0056] It should be noted that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present invention are all included in the technical scope of the present invention. In addition, without departing from the scope of the main purpose of the present invention, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present invention.

Claims

1. A cleaning device for photovoltaic self-cleaning, characterized in that: include: A spray assembly (1) for spraying cleaning fluid; A plurality of cleaning brushes (2), wherein the plurality of cleaning brushes (2) are arranged in a transverse direction of the cleaning device; The recovery component (3) comprises a plurality of centrifugal brushes (31) and a collection chamber (32). The plurality of centrifugal brushes (31) are arranged in the transverse direction of the cleaning device. The centrifugal brushes (31) are arranged between the cleaning brush (2) and the collection chamber (32). The centrifugal brushes (31) can rotate relative to a rotation axis and form an angle of 40° to 80° between the rotation axis and the photovoltaic panel.

2. A cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: Taking the two side walls of the cleaning device in the lateral direction as the object, there are at least two centrifugal brushes (31) adjacent to any side wall, and the linear speed direction of the contact point between the centrifugal brushes (31) and the photovoltaic panel points to the central axis of the cleaning device.

3. The cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: A receiving plate (33) is provided at the bottom of the collecting chamber (32), and the receiving plate (33) extends to the bottom position of the rotating shaft of the centrifugal brush (31).

4. A cleaning device for photovoltaic self-cleaning according to claim 3, characterized in that: It also includes an air compressor (41) and a guide cavity (42), wherein the air compressor (41) is communicated with the guide cavity (42), and the guide cavity (42) is formed on a side of the receiving plate (33) away from the centrifugal brush (31).

5. The cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: The centrifugal brush (31) comprises a fixing portion (311), a plurality of flexible cloth strips (312) and a plurality of flexible rubber hoses (313); the plurality of flexible cloth strips (312) are fixedly connected to the fixing portion (311); the plurality of flexible rubber hoses (313) are fixedly connected to the fixing portion (311) and sleeved around the outer periphery of the corresponding flexible cloth strips (312); the length of the flexible cloth strips (312) is greater than the flexible rubber hoses (313).

6. The cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: The invention also comprises a driving mechanism (5), which comprises a motor (51), a first transmission rod (52), a plurality of first bevel gears (53), a plurality of second bevel gears (54) and a plurality of flexible shafts (55); the motor (51) is used to drive the first transmission rod (52) to rotate; the plurality of first bevel gears (53) are arranged along the length direction of the first transmission rod (52); the plurality of second bevel gears (54) are meshed with the corresponding first bevel gears (53); and the centrifugal brush (31) is connected to the corresponding second bevel gears (54) through a flexible shaft (55).

7. A cleaning device for photovoltaic self-cleaning according to claim 6, characterized in that: The invention also comprises an adjusting mechanism (6), wherein the adjusting mechanism (6) comprises a second transmission rod (61), a plurality of sleeve rods (62), a plurality of traction rods (63) and a plurality of traction mechanisms (64), wherein the plurality of traction mechanisms (64) are arranged along the length direction of the second transmission rod (61), the traction rod (63) is hinged with the sleeve rod (62), the flexible shaft (55) passes through the sleeve rod (62) and the traction rod (63) in sequence and is rotatably connected with the traction rod (63), and the second transmission rod (61) and the traction rod (63) are transmission-connected via the corresponding traction mechanism (64).

8. The cleaning device for photovoltaic self-cleaning according to claim 7, characterized in that: The traction mechanism (64) comprises a rotating disk (641), a first connection point (642), a second connection point (643), a first traction rope (644) and a second traction rope (645); the first connection point (642) and the second connection point (643) are arranged along the circumference of the rotating disk (641); the first traction rope (644) passes through the sleeve rod (62) and its two ends are respectively fixedly connected to the traction rod (63) and the first connection point (642); the second traction rope (645) passes through the sleeve rod (62) and its two ends are respectively fixedly connected to the traction rod (63) and the second connection point (643).

9. The cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: The centrifugal brush (31) can rotate relative to the rotation axis and an angle of 55° to 65° is formed between the rotation axis and the photovoltaic panel.

10. The cleaning device for photovoltaic self-cleaning according to claim 1, characterized in that: The side wall of the collecting chamber (32) is connected to the outside of the cleaning equipment through a drainage hose, and the drainage hose is provided with a drainage pump.

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