Automatic cleaning system for photovoltaic solar panel

Abstract

The automatic cleaning system comprises a cleaning box for automatically cleaning a photovoltaic panel and a water tank for supplying water to the cleaning box, the water tank is communicated with a water outlet pipe through a water guide pipe, and the two ends of the water outlet pipe are each provided with a set of first water outlet holes distributed annularly. A water outlet pipe at the first water outlet hole is sleeved with a rotating sleeve connected with a sealing bearing of the water outlet pipe, the two rotating sleeves are connected with a cleaning box through a first communicating pipe and a second communicating pipe correspondingly, the cleaning box is provided with an open groove for embedding a cleaning pool, and a plurality of ultrasonic transducers are installed in the cleaning box; and the ultrasonic transducer is in contact with the bottom of the cleaning pool. Through ultrasonic cleaning, stubborn dirt can be removed, the cleaning process does not need intervention of equipment such as a brush, scratches on surface glass of the photovoltaic panel cannot be caused, and the power generation efficiency of the photovoltaic panel is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic related technologies, and in particular to an automatic cleaning system for photovoltaic solar panels. Background Art

[0002] Since photovoltaic solar panels operate outdoors, dust and other dirt are easily accumulated on their surfaces. These dust and other dirt have the function of reflecting, scattering and absorbing solar radiation, resulting in a decrease in the solar radiation received by the photovoltaic solar panels, and the output power is also reduced, which greatly affects the power generation efficiency of the photovoltaic solar panels. Therefore, photovoltaic solar panels need to be cleaned regularly.

[0003] The current cleaning method is mostly flushing with clean water, using high-pressure water flow to impact the surface of photovoltaic solar panels to wash away dust and other dirt. However, for some stubborn dirt, a brush or roller brush is also needed. The brush or roller brush combined with high-pressure water flow can remove the stubborn dirt on the surface of photovoltaic solar panels, thereby improving the cleaning effect.

[0004] The surface of photovoltaic solar panels is made of glass panels, and brushes or roller brushes are mostly made of hard nylon. When scratching the glass panels, it is easy to cause slight scratches on the surface of the glass panels. Over time, the scratches will accumulate more and more, which will destroy the smoothness of the glass panel surface, causing light to scatter and reflect when it hits the scratches, reducing the chance of light directly hitting the photovoltaic solar panels and affecting the power generation efficiency. At the same time, during the cleaning process, it is not easy to collect water flow, which can easily cause waste of water resources.

[0005] In summary, the current prior art still has defects and needs to be improved. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, an object of the present invention is to provide an automatic cleaning system for photovoltaic solar panels, including a cleaning box for automatically cleaning the photovoltaic panels, and a water tank for supplying water to the cleaning box.

[0008] The water tank is connected to a water outlet pipe through a water conduit, and a group of first water outlet holes distributed in a ring are opened at both ends of the water outlet pipe. The water outlet pipe at the first water outlet hole is sleeved with a rotating sleeve connected to its sealing bearing, and the two rotating sleeves are respectively connected to the cleaning box through the first connecting pipe and the second connecting pipe.

[0009] The cleaning box is provided with an open slot for embedding the cleaning pool. A plurality of ultrasonic transducers are installed in the cleaning box, and the ultrasonic transducers are in contact with the bottom of the cleaning pool.

[0010] A plurality of second water outlet holes communicated with the first connecting pipe and a plurality of third water outlet holes communicated with the second connecting pipe are formed on one side wall of the cleaning pool, a drainage pipe is welded to the other side wall of the cleaning pool, and a water inlet pipe matching the drainage pipe is connected to the water tank.

[0011] The water outlet pipe is provided with a driving mechanism for driving the rotating sleeve to rotate axially.

[0012] As the preferred technical solution:

[0013] In the automatic cleaning system for a photovoltaic solar panel as described above, the first connecting pipe and the second connecting pipe have the same structure, the first connecting pipe includes a first connecting pipe and a second connecting pipe, one end of the first connecting pipe and the second connecting pipe are both extended into a connecting box and welded and fixed to the connecting box, a solenoid valve is bolted in the connecting box, and the ports of the solenoid valve are sealed and docked with one end of the first connecting pipe and the second connecting pipe respectively.

[0014] Through the above technical solution, the first connecting tube and the second connecting tube form a whole through the connecting box, so that when the rotating sleeve rotates axially, the whole formed by the first connecting tube, the second connecting tube and the connecting box can drive the cleaning box to rotate.

[0015] In the automatic cleaning system for photovoltaic solar panels as described above, an annular groove is formed on the inner circular wall of the rotating sleeve, and the first connecting pipes on the first connecting pipe and the second connecting pipe are both welded and connected to the rotating sleeve at the groove.

[0016] Through the above technical solution, the groove is set so that an annular cavity is formed between the rotating sleeve and the outer wall of the water outlet pipe. Clean water can enter the cavity after flowing out through the first water outlet hole, and can flow into the first connecting pipe through the cavity.

[0017] As described above, an automatic cleaning system for photovoltaic solar panels, the top of the side wall of the cleaning pool is welded to the inner wall of the cleaning box at the opening groove, a transverse partition is welded to the outer wall of one side of the cleaning pool, and a vertical partition is welded to the bottom wall of the cleaning pool, and the transverse partition and the vertical partition are both welded to the inner wall of the cleaning box, the transverse partition, the vertical partition, the outer wall of the cleaning pool and the inner wall of the cleaning box enclose a first water collecting chamber, and the transverse partition, the inner wall of the cleaning box and the outer wall of the cleaning pool enclose a second water collecting chamber.

[0018] The second connecting pipe on the first connecting pipe is connected to the cleaning box on one side of the first water collecting chamber by welding, and the second connecting pipe on the second connecting pipe is connected to the cleaning box on one side of the second water collecting chamber by welding.

[0019] Through the above technical solution, the interior of the cleaning box is hollow, and the interior of the cleaning box and the cleaning pool are divided into three spaces by horizontal partitions and vertical partitions, two of which are the first water collecting chamber and the second water collecting chamber, and the other is the aperture for accommodating the ultrasonic transducer. In this way, during the cleaning process, the ultrasonic transducer is prevented from contacting the water flow, thereby ensuring the normal operation of the ultrasonic transducer.

[0020] In the automatic cleaning system for photovoltaic solar panels as described above, the second water outlet is located on the wall of the cleaning pool on one side of the first water collecting chamber, and the third water outlet is located on the wall of the cleaning pool on one side of the second water collecting chamber.

[0021] The aperture of the second water outlet hole is larger than that of the third water outlet hole. The third water outlet hole is located close to the open end of the cleaning pool, and the third water outlet hole is inclined as a whole.

[0022] Through the above technical solution, the first connecting pipe can quickly inject clean water into the cleaning pool through the second water outlet, and the second connecting pipe can spray a high-pressure and high-speed water column into the cleaning pool through the second water outlet. The second water outlet and the third water outlet cooperate with each other to better complete the cleaning operation.

[0023] In the automatic cleaning system for photovoltaic solar panels as described above, the driving mechanism comprises a fixing box, the fixing box is provided with a through hole for the connecting rod and the water outlet pipe to pass through, and the fixing box is provided with a motor.

[0024] There are multiple connecting rods, both ends of which are welded to the sides of two rotating sleeves, a fixing ring is sleeved on the connecting rod and welded to it, a first gear is fixed by a pin on the outer circular wall of the fixing ring, and a second gear meshing with the first gear is fixed by a pin on the output shaft of the motor.

[0025] Through the above technical solution, when the motor is powered on and running, the meshing action of the first gear and the second gear can drive the fixed collar to rotate axially. Since the fixed collar and the connecting rod are welded and fixed, the fixed collar drives the rotating sleeve to rotate axially through the connecting rod. By changing the rotation direction of the motor, the rotating sleeve can be rotated clockwise and counterclockwise.

[0026] In the automatic cleaning system for photovoltaic solar panels as described above, one end of the water outlet pipe is sealed and connected to the water pipe flange, the other end of the water outlet pipe is closed, and the water outlet pipe and the outer wall of the fixing box are fixed to the ground by metal support bolts.

[0027] Through the above technical solution, the water outlet pipe and the fixing box can be fixed by the metal support rod, and the motor and other components in the fixing box can operate stably, so that the cleaning box can rotate smoothly around the water outlet pipe to ensure that the cleaning operation can be carried out normally.

[0028] In an automatic cleaning system for photovoltaic solar panels as described above, one end of the drain pipe passes through the wall of the cleaning box, the inner wall of the side where the cleaning pool is connected to the drain pipe is conical, the drain pipe is "L"-shaped as a whole, a first horizontal plate is welded and fixed to the inner wall of the bottom end of the drain pipe, and a top rod is welded and fixed at the center of the bottom end of the first horizontal plate.

[0029] The top end of the water inlet pipe and the bottom end of the drainage pipe are both welded and fixed with docking rings. The top end of the water inlet pipe is inclined, and the axis of the top end of the water inlet pipe is tangent to the rotation track of the bottom end of the drainage pipe.

[0030] A fixing ring and a second horizontal plate are welded and fixed to the inner wall of the top end of the water inlet pipe from top to bottom in sequence, a guide rod passes through the second horizontal plate, a sealing plate is welded and fixed to the top end of the guide rod, an elastic spring is sleeved on the guide rod, and the diameter of the sealing plate is larger than the inner diameter of the fixing ring.

[0031] Through the above technical solution, the design of the top end of the water inlet pipe and the bottom end of the drain pipe enables the bottom end of the drain pipe to be accurately inserted into the top end of the water inlet pipe when the drain pipe rotates with the cleaning box, so that the drain pipe and the water inlet pipe can be docked. The structure is reasonable, and the sealing ring is bonded to the surface of the docking ring. When the drain pipe and the water inlet pipe are docked, the docking rings on the two will fit together, and the sealing ring can improve the sealing of the docking point.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] (1) The present invention integrates the ultrasonic cavitation effect and multi-stage fluid impact technology into the same cleaning cycle. Through the time-sharing control of the first connecting pipe and the second connecting pipe, the micro-bubble rupture energy (cavitation effect) generated by the ultrasonic transducer is first used to remove stubborn dirt at the micro-nano level, and then the high-pressure inclined jet (third water outlet) is driven by the second connecting pipe to directionally flush the residual dirt. The two modes form a synergistic effect through the timing switching of the solenoid valve, breaking through the physical limitations of traditional single cleaning technology, avoiding mechanical friction damage, and achieving the layer-by-layer disintegration and removal of dirt.

[0034] (2) The present invention connects the sealing bearing of the water outlet pipe through a rotating sleeve, combined with the gear transmission of the driving mechanism (the first gear is meshed with the second gear), so that the cleaning box can be dynamically fitted on the surface of the photovoltaic panel. During the rotation of the cleaning box, the top rod at the bottom of the drain pipe is adaptively adjusted through the elastic spring and the pre-tightening force of the sealing plate to ensure the precise docking of the water inlet pipe and the drain pipe. Through the coupling of mechanical dynamics and fluid dynamics, this design realizes the airtightness of the cleaning chamber, the continuity of energy transfer and the synchronization of sewage recovery under a non-fixed path, solving the problems of sealing and fluid transmission in the rotating cleaning scenario.

[0035] (3) The first water collection chamber and the second water collection chamber are constructed in the cleaning box of the present invention through the horizontal partition and the vertical partition, forming a three-channel independent topological structure of "cleaning-flushing-recovery". The first water collection chamber is responsible for the uniform water injection in the ultrasonic cleaning stage, and the second water collection chamber forms a turbulent jet by tilting the third water outlet, while the ultrasonic transducer at the bottom of the cleaning pool is completely separated from the water channel by a physical isolation layer (vertical partition). This layered design not only realizes the physical decoupling of the energy field (ultrasound) and the fluid field (water flow), avoiding the failure of the transducer due to immersion in water, but also optimizes the water flow dynamics characteristics through the pressure gradient between the cavities, thereby improving the utilization rate of water resources.

[0036] (4) The present invention combines the tapered inner wall design of the "L"-shaped drain pipe with the inclined docking ring of the water inlet pipe to achieve pre-separation of sewage particles through centrifugal force. With the gradient filtration module (stainless steel filter and activated carbon layer) embedded in the water tank, suspended matter in the sewage can be intercepted during the circulation process, and the elastic adaptive closing mechanism of the sealing plate (effectively blocks the invasion of external pollutants. This design forms a closed-loop ecological chain of "cleaning-filtration-regeneration", which is more water-saving than the traditional open-loop cleaning system and does not require the intervention of external purification equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 It is a stereoscopic view of the cleaning box of the present invention before rotation;

[0039] Figure 2 It is a three-dimensional view of the cleaning box of the present invention after rotation;

[0040] Figure 3 It is a side view of the photovoltaic panel and the cleaning box of the present invention;

[0041] Figure 4 It is a three-dimensional exploded view of the water outlet pipe and the rotating sleeve of the present invention;

[0042] Figure 5 It is a three-dimensional exploded view of the cleaning box and the cleaning pool of the present invention;

[0043] Figure 6 A side longitudinal sectional view of the cleaning box and the cleaning pool of the present invention;

[0044] Figure 7 is a cross-sectional view of a first connecting pipe of the present invention;

[0045] Figure 8 For the present invention Figure 3 Enlarged view of point A in the middle;

[0046] Fig. 9It is a stereoscopic view of the ejector rod, the fixing ring and the sealing plate of the present invention.

[0047] In the figure: 1, photovoltaic panel; 2, water tank; 3, water guide pipe; 4, water outlet pipe; 5, first water outlet hole; 6, rotating sleeve; 7, groove; 8, first connecting pipe; 9, second connecting pipe; 10, cleaning box; 11, cleaning tank; 12, second water outlet hole; 13, third water outlet hole; 14, horizontal partition; 15, vertical partition; 16, first water collecting chamber; 17, second water collecting chamber; 18, ultrasonic transducer; 19, drain pipe; 20, water inlet pipe; 21, first connecting pipe; 22, second connecting pipe; 23, connecting box; 24, solenoid valve; 25, fixing box; 26, through hole; 27, connecting rod; 28, fixing collar; 29, first horizontal plate; 30, top rod; 31, fixing ring; 32, sealing plate; 33, guide rod; 34, second horizontal plate; 35, elastic spring; 36, docking ring; 37, opening groove. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0050] See also Figure 1-6 The present invention provides a technical solution: an automatic cleaning system for a photovoltaic solar panel, comprising a cleaning box 10 for automatically cleaning a photovoltaic panel 1, and a water tank 2 for supplying water to the cleaning box 10.

[0051] The water tank 2 is connected to the water outlet pipe 4 through the water guide pipe 3. One end of the water outlet pipe 4 is sealed with the flange of the water guide pipe 3. The other end of the water outlet pipe 4 is closed. A group of first water outlet holes 5 distributed in an annular shape are opened at both ends of the water outlet pipe 4. The water outlet pipe 4 at the first water outlet hole 5 is sleeved with a rotating sleeve 6 connected to its sealing bearing. The two rotating sleeves 6 are connected to the cleaning box 10 through the first connecting pipe 8 and the second connecting pipe 9 respectively.

[0052] The cleaning box 10 is provided with an opening groove 37 for the cleaning pool 11 to be embedded. A plurality of ultrasonic transducers 18 are installed in the cleaning box 10 , and the ultrasonic transducers 18 are in contact with the bottom of the cleaning pool 11 .

[0053] A plurality of second water outlet holes 12 communicated with the first connecting pipe 8 and a plurality of third water outlet holes 13 communicated with the second connecting pipe 9 are provided on one side wall of the cleaning pool 11. A drain pipe 19 is welded to the other side wall of the cleaning pool 11. A water inlet pipe 20 matched with the drain pipe 19 is connected to the water tank 2. The aperture of the second water outlet hole 12 is larger than that of the third water outlet hole 13. The third water outlet hole 13 is located close to the open end of the cleaning pool 11, and the third water outlet hole 13 is inclined as a whole.

[0054] The water outlet pipe 4 is provided with a driving mechanism for driving the rotating sleeve 6 to rotate axially.

[0055] When not in use, the cleaning box 10 is located below the photovoltaic panel 1 , which can prevent dirt such as fallen leaves from accumulating inside the cleaning box 10 .

[0056] The existing photovoltaic panels 1 all include a metal frame, and the size of the cleaning box 10 is consistent with the size of the metal frame, and the size of the cleaning pool 11 is consistent with the size of the surface glass of the photovoltaic panel 1, and a sealing ring is bonded to the surface of the cleaning box 10 outside the opening groove 37.

[0057] During cleaning, the driving mechanism drives the rotating sleeve 6 to rotate axially on the water outlet pipe 4. While the rotating sleeve 6 rotates, the cleaning box 10 can be driven to rotate synchronously through the first connecting tube 8 and the second connecting tube 9. The cleaning box 10 rotates from below the photovoltaic panel 1 to above the photovoltaic panel 1. At this time, the cleaning box 10 is fitted with the metal frame of the photovoltaic panel 1, and the cleaning pool 11 is aligned and fitted with the surface glass of the photovoltaic panel 1. In this way, a cleaning cavity is enclosed between the cleaning box 10 and the surface glass of the photovoltaic panel 1. The sealing ring on the surface of the cleaning box 10 can avoid water leakage, and the drain pipe 19 can be connected to the water inlet pipe 20 at this time.

[0058] In order to prevent scratches on the cleaning pool 11 and the surface glass of the photovoltaic panel 1 , a sponge pad is bonded to the top surface of the side wall of the cleaning pool 11 .

[0059] A water pump is arranged inside the water tank 2, and the clean water in the water tank 2 is pumped into the water outlet pipe 4 through the water pump through the water guide pipe 3. Since the inner circular wall of the rotating sleeve 6 is provided with an annular groove 7, the clean water will flow out from the first water outlet hole 5 and then enter the groove 7, and then be sprayed out from the second water outlet hole 12 through the first connecting pipe 8. The clean water can quickly fill the cleaning cavity, and then the ultrasonic transducer 18 is powered on and operated. The ultrasonic transducer 18 can generate ultrasonic waves, and the energy generated by the high-frequency vibration of ultrasonic waves is used to generate tiny bubbles in the cleaning cavity. The energy released when the bubbles burst can quickly dissolve and disperse the dirt attached to the surface glass of the photovoltaic panel 1, thereby realizing automatic cleaning. Then the cleaned sewage flows into the water tank 2 through the drain pipe 19 and the water inlet pipe 20.

[0060] After the sewage is discharged, there will be residual dirt retained on the surface glass of the photovoltaic panel 1. At this time, the water tank 2 will spray clean water again from the third water outlet 13 through the second connecting pipe 9. The inclination and aperture design of the third water outlet 13 allow the water flow to be injected into the surface glass of the photovoltaic panel 1 in a high-speed and high-pressure form. The water flows along the surface glass of the photovoltaic panel 1 and flushes away the residual dirt, which can improve the flushing efficiency. The flushing water flows into the water tank 2 again through the drain pipe 19 and the water inlet pipe 20.

[0061] A stainless steel filter or other filtering equipment is arranged in the water tank 2, which can filter sewage to realize the recycling of water resources. The water tank 2 can be pre-buried underground or installed in a tower.

[0062] like Figure 5 , Figure 6 and Figure 7 As shown, the first connecting pipe 8 and the second connecting pipe 9 have the same structure. The first connecting pipe 8 includes a first connecting pipe 21 and a second connecting pipe 22. One end of the first connecting pipe 21 and the second connecting pipe 22 are both extended into the connecting box 23 and welded to the connecting box 23. A solenoid valve 24 is bolted in the connecting box 23, and the ports of the solenoid valve 24 are sealed and connected to one end of the first connecting pipe 21 and the second connecting pipe 22 respectively.

[0063] The first connecting pipes 21 on the first connecting pipe 8 and the second connecting pipe 9 are both welded and connected to the rotating sleeve 6 at the groove 7 .

[0064] The top of the side wall of the cleaning tank 11 is welded to the inner wall of the cleaning box 10 at the opening groove 37, a transverse partition 14 is welded to the outer wall of one side of the cleaning tank 11, and a vertical partition 15 is welded to the bottom wall of the cleaning tank 11. The transverse partition 14 and the vertical partition 15 are both welded to the inner wall of the cleaning box 10. The transverse partition 14, the vertical partition 15 and the outer wall of the cleaning tank 11 and the inner wall of the cleaning box 10 enclose a first water collecting chamber 16, and the transverse partition 14, the inner wall of the cleaning box 10 and the outer wall of the cleaning tank 11 enclose a second water collecting chamber 17.

[0065] The second connecting pipe 22 on the first connecting pipe 8 is welded to the cleaning box 10 on one side of the first water collecting chamber 16 , and the second connecting pipe 22 on the second connecting pipe 9 is welded to the cleaning box 10 on one side of the second water collecting chamber 17 .

[0066] The second water outlet 12 is located on the wall of the cleaning pool 11 at one side of the first water collecting chamber 16 , and the third water outlet 13 is located on the wall of the cleaning pool 11 at one side of the second water collecting chamber 17 .

[0067] The opening and closing devices of the first connecting pipe 8 and the second connecting pipe 9 are controlled by the electromagnetic valve 24. Thus, when cleaning, the first connecting pipe 8 can be opened first, and the second connecting pipe 9 can be closed. Preliminary ultrasonic cleaning can be performed first, and then the first connecting pipe 8 can be closed and the second connecting pipe 9 can be opened to flush out the residue after the preliminary cleaning.

[0068] The water inlet pipe 20 is also provided with a solenoid valve 24. When cleaning, the water inlet pipe 20 can be closed by the solenoid valve 24. When drainage is required, the water inlet pipe 20 can be opened.

[0069] When water flows into the groove 7, it will first flow into the first connecting pipe 8, and then flow into the second connecting pipe 22 through the solenoid valve 24. The clean water in the first connecting pipe 8 will be guided to the first water collecting chamber 16, and will eventually be sprayed out from the second water outlet 12. The clean water in the second connecting pipe 9 will be guided to the second water collecting chamber 17, and will eventually be sprayed out from the third water outlet 13. The operations of the second water outlet 12 and the third water outlet 13 do not interfere with each other, and cooperate with each other to achieve efficient and sufficient cleaning.

[0070] like Figure 1 and Figure 4 As shown, the driving mechanism includes a fixing box 25, which is provided with a through hole 26 for the connecting rod 27 and the water outlet pipe 4 to penetrate, and a motor is arranged in the fixing box 25. The water outlet pipe 4 and the outer wall of the fixing box 25 are fixed to the ground by metal support bolts.

[0071] There are multiple connecting rods 27, and both ends of the connecting rods 27 are welded to the sides of the two rotating sleeves 6. A fixing ring 28 welded to the connecting rod 27 is sleeved on the connecting rod 27, and a first gear is fixed to the outer circular wall of the fixing ring 28 by a pin, and a second gear meshing with the first gear is fixed to the output shaft of the motor by a pin.

[0072] The components such as the motor, water pump, solenoid valve 24 and ultrasonic transducer 18 are all connected to the control end by wired or wireless means, which is not limited here, so that people can control and operate remotely.

[0073] The motor can drive the fixed collar 28 to rotate forward and reverse through the first gear and the second gear, and then the fixed collar 28 can drive the rotating sleeve 6 to rotate forward and reverse through the connecting rod 27. The rotating sleeve 6 drives the cleaning box 10 to rotate clockwise or counterclockwise through the first connecting tube 8 and the second connecting tube 9, so that the cleaning box 10 can be rotated to the surface of the photovoltaic panel 1 for cleaning operations, and the photovoltaic panel 1 can be rotated to the bottom of the photovoltaic panel 1 for storage.

[0074] like Figure 3 , Figure 8 and Fig. 9As shown, one end of the drain pipe 19 passes through the wall of the cleaning box 10, the inner wall of the side where the cleaning pool 11 is connected to the drain pipe 19 is conical, and the drain pipe 19 is "L"-shaped as a whole. A first horizontal plate 29 is welded and fixed to the inner wall of the bottom end of the drain pipe 19, and a top rod 30 is welded and fixed at the center of the bottom end of the first horizontal plate 29.

[0075] A docking ring 36 is welded and fixed to the top end of the water inlet pipe 20 and the bottom end of the drainage pipe 19 . The top end of the water inlet pipe 20 is inclined, and the axis of the top end of the water inlet pipe 20 is tangent to the rotation track of the bottom end of the drainage pipe 19 .

[0076] A fixing ring 31 and a second horizontal plate 34 are welded and fixed to the inner wall of the top end of the water inlet pipe 20 from top to bottom in sequence. A guide rod 33 passes through the second horizontal plate 34. A sealing plate 32 is welded and fixed to the top end of the guide rod 33. An elastic spring 35 is sleeved on the guide rod 33. The diameter of the sealing plate 32 is larger than the inner diameter of the fixing ring 31.

[0077] When cleaning is not performed, the elastic spring 35 can push the sealing plate 32 and the fixing ring 31 tightly together through its own elastic force, thereby preventing foreign debris and dirt from entering the water inlet pipe 20 and preventing the water inlet pipe 20 from being blocked.

[0078] When the cleaning box 10 rotates to the surface of the photovoltaic panel 1, the drain pipe 19 will gradually be inserted into the water inlet pipe 20. During the insertion process, the push rod 30 will extend into the water inlet pipe 20 and contact the sealing plate 32. As the cleaning box 10 rotates, the push rod 30 will push the sealing plate 32. The sealing plate 32 moves along the second cross plate 34 through the guide rod 33 and gradually separates from the fixing ring 31. In this way, the inner circle of the fixing ring 31 is in an open state. At this time, the water inlet pipe 20 and the drain pipe 19 are connected to each other, and the sewage after cleaning will flow into the water inlet pipe 20 through the drain pipe 19.

[0079] The first transverse plate 29 and the second transverse plate 34 are both designed to be long strips, so as not to block the drain pipe 19 and the water inlet pipe 20, thereby ensuring smooth drainage.

[0080] In the description of this specification, "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic cleaning system for a photovoltaic solar panel, comprising a cleaning box (10) for automatically cleaning a photovoltaic panel (1), and a water tank (2) for supplying water to the cleaning box (10), characterized in that: The water tank (2) is connected to a water outlet pipe (4) via a water guide pipe (3); a group of first water outlet holes (5) distributed in an annular shape are formed at both ends of the water outlet pipe (4); a rotating sleeve (6) connected to a sealing bearing is sleeved on the water outlet pipe (4) at the first water outlet holes (5); the two rotating sleeves (6) are connected to a cleaning box (10) via a first connecting pipe (8) and a second connecting pipe (9), respectively; The cleaning box (10) is provided with an opening groove (37) for embedding the cleaning pool (11), and a plurality of ultrasonic transducers (18) are installed in the cleaning box (10), and the ultrasonic transducers (18) are in contact with the bottom of the cleaning pool (11); A plurality of second water outlet holes (12) in communication with the first connecting pipe (8) and a plurality of third water outlet holes (13) in communication with the second connecting pipe (9) are formed on one side wall of the cleaning pool (11); a drainage pipe (19) is welded to the other side wall of the cleaning pool (11); and a water inlet pipe (20) matching the drainage pipe (19) is connected to the water tank (2); The water outlet pipe (4) is provided with a driving mechanism for driving the rotating sleeve (6) to rotate axially.

2. The automatic cleaning system for photovoltaic solar panels according to claim 1, characterized in that: The first connecting pipe (8) and the second connecting pipe (9) have the same structure. The first connecting pipe (8) comprises a first connecting pipe (21) and a second connecting pipe (22). One end of the first connecting pipe (21) and the second connecting pipe (22) are both inserted into the connecting box (23) and are welded and fixed to the connecting box (23). A solenoid valve (24) is bolted inside the connecting box (23). Ports of the solenoid valve (24) are sealed and butted with one end of the first connecting pipe (21) and the second connecting pipe (22), respectively.

3. The automatic cleaning system for photovoltaic solar panels according to claim 2, characterized in that: An annular groove (7) is formed on the inner circular wall of the rotating sleeve (6), and the first connecting pipes (21) on the first connecting pipe (8) and the second connecting pipe (9) are both welded and connected to the rotating sleeve (6) at the groove (7).

4. The automatic cleaning system for photovoltaic solar panels according to claim 2, characterized in that: The top end of the side wall of the cleaning tank (11) is welded to the inner wall of the cleaning box (10) at the opening groove (37); a transverse partition (14) is welded to the outer wall of one side of the cleaning tank (11); a vertical partition (15) is welded to the bottom wall of the cleaning tank (11); the transverse partition (14) and the vertical partition (15) are both welded to the inner wall of the cleaning box (10); the transverse partition (14), the vertical partition (15), the outer wall of the cleaning tank (11) and the inner wall of the cleaning box (10) are enclosed to form a first water collecting chamber (16); the transverse partition (14), the inner wall of the cleaning box (10) and the outer wall of the cleaning tank (11) are enclosed to form a second water collecting chamber (17).

5. The automatic cleaning system for photovoltaic solar panels according to claim 4, characterized in that: The second connecting pipe (22) on the first connecting pipe (8) is welded to the cleaning box (10) on one side of the first water collecting chamber (16), and the second connecting pipe (22) on the second connecting pipe (9) is welded to the cleaning box (10) on one side of the second water collecting chamber (17).

6. The automatic cleaning system for photovoltaic solar panels according to claim 4, characterized in that: The second water outlet hole (12) is located on the wall of the cleaning pool (11) on one side of the first water collecting chamber (16), and the third water outlet hole (13) is located on the wall of the cleaning pool (11) on one side of the second water collecting chamber (17). The aperture of the second water outlet hole (12) is larger than the aperture of the third water outlet hole (13); the third water outlet hole (13) is located close to the open end of the cleaning pool (11); and the third water outlet hole (13) is generally inclined.

7. The automatic cleaning system for photovoltaic solar panels according to claim 1, characterized in that: The driving mechanism comprises a fixing box (25), the fixing box (25) is provided with a through hole (26) for the connecting rod (27) and the water outlet pipe (4) to pass through, and a motor is arranged in the fixing box (25). A plurality of connecting rods (27) are provided, and both ends of the connecting rods (27) are welded to the side surfaces of the two rotating sleeves (6). A fixing collar (28) is sleeved on the connecting rod (27) and is welded to the connecting rod (27). A first gear is fixed by a bayonet on the outer wall of the fixing collar (28), and a second gear meshing with the first gear is fixed by a bayonet on the output shaft of the motor.

8. The automatic cleaning system for photovoltaic solar panels according to claim 1, characterized in that: One end of the water outlet pipe (4) is sealedly connected to the water guide pipe (3) flange, and the other end of the water outlet pipe (4) is closed. The water outlet pipe (4) and the outer wall of the fixing box (25) are fixed to the ground by metal support bolts.

9. The automatic cleaning system for photovoltaic solar panels according to claim 1, characterized in that: One end of the drain pipe (19) passes through the wall of the cleaning box (10); the inner wall of the cleaning pool (11) communicating with the drain pipe (19) is conical; the drain pipe (19) is L-shaped as a whole; a first horizontal plate (29) is welded and fixed to the inner wall of the bottom end of the drain pipe (19); and a top rod (30) is welded and fixed at the center of the bottom end of the first horizontal plate (29).

10. The automatic cleaning system for photovoltaic solar panels according to claim 9, characterized in that: The top end of the water inlet pipe (20) and the bottom end of the drainage pipe (19) are both welded and fixed with a docking ring (36); the top end of the water inlet pipe (20) is inclined, and the axis of the top end of the water inlet pipe (20) is tangent to the rotation trajectory of the bottom end of the drainage pipe (19). A fixing ring (31) and a second transverse plate (34) are welded and fixed to the inner wall of the top end of the water inlet pipe (20) from top to bottom in sequence, a guide rod (33) passes through the second transverse plate (34), a sealing plate (32) is welded and fixed to the top end of the guide rod (33), an elastic spring (35) is sleeved on the guide rod (33), and the diameter of the sealing plate (32) is larger than the inner diameter of the fixing ring (31).

Images