CN216574426U - Cleaning equipment for photovoltaic cell panel - Google Patents
Cleaning equipment for photovoltaic cell panel Download PDFInfo
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- CN216574426U CN216574426U CN202122763262.1U CN202122763262U CN216574426U CN 216574426 U CN216574426 U CN 216574426U CN 202122763262 U CN202122763262 U CN 202122763262U CN 216574426 U CN216574426 U CN 216574426U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a cleaning device for a photovoltaic cell panel, which comprises a box body, wherein first bearings are fixedly connected at the top and the bottom of the box body close to the center, inner cavities of the two first bearings are commonly penetrated and provided with threaded columns, through the mutual matching of all the parts, the device is convenient to move, the flexibility of the device is increased, the photovoltaic cell panel can be conveniently cleaned by adjusting the height of the device according to the height of the photovoltaic cell panel, a high-pressure nozzle can be rotated and sprayed by 180 degrees in the left and right directions, the cleaning range of the photovoltaic cell panel is wide, the cleaning efficiency is improved, meanwhile, the spraying angle of the high-pressure nozzle can be adjusted according to the inclination angle of the photovoltaic cell panel, the cleaning effect of the device on the photovoltaic cell panel is better, the cleaning is cleaner, the high-pressure nozzle 25 is convenient to assemble and disassemble, and the device can be conveniently recycled after the cleaning is finished, the operation is simple, convenient and fast, and the use is convenient.
Description
Technical Field
The utility model relates to the technical field of photovoltaic power generation, in particular to cleaning equipment for a photovoltaic cell panel.
Background
In the clean energy technology, photovoltaic power generation is an important clean energy production method, and the key of the photovoltaic power generation technology is that a large number of solar photovoltaic cell panels are connected in series and parallel according to the requirements of power generation voltage and capacity, and then are matched with components such as a power controller and the like to form a photovoltaic power generation device;
the photovoltaic power generation station not only is relevant to the illumination intensity, but also is relevant to the surface cleaning degree of the photovoltaic cell panel, under the same illumination intensity, the transparent photovoltaic cell panel with clean surface can send the maximum electric energy corresponding to the illumination intensity, and the photovoltaic cell panel covered by dust on the surface can only send partial electric energy, if the dust on the surface of the photovoltaic cell panel is not cleaned in time, the effective power generation capacity and the return on investment rate of the whole photovoltaic power station are reduced, the electric energy production of the power station is very unfavorable, in the prior art, because the space between the adjacent photovoltaic cell panels is very small, the photovoltaic cell panel is difficult to clean.
SUMMERY OF THE UTILITY MODEL
In order to overcome the disadvantages of the prior art, one of the objects of the present invention is to provide a cleaning apparatus for a photovoltaic cell panel.
One of the purposes of the utility model is realized by adopting the following technical scheme:
a cleaning device for a photovoltaic cell panel comprises a box body, wherein first bearings are fixedly connected to the top and the bottom of the box body close to a center, two first bearing inner cavities commonly run through a threaded column, a driven bevel gear is sleeved on the edge of the outer side of the threaded column close to the bottom, a second bearing is fixedly connected to the right side of the box body close to the center, a rotating rod runs through the inner cavity of the second bearing, a driving bevel gear is fixedly connected to the left end of the rotating rod, the driven bevel gear and the driving bevel gear are arranged in a mutually meshed mode, an L-shaped handle is fixedly connected to the right end of the rotating rod, a threaded pipe is arranged at the top of the box body close to the center, a threaded pipe inner cavity runs through the top end of the threaded column, the edge of the outer side of the threaded column and the threaded pipe inner cavity are arranged in a mutually meshed mode, a connecting plate is fixedly connected to the top of the threaded pipe, and a motor is fixedly connected to the top of the connecting plate close to the right side, the motor power output shaft is fixedly connected with a rotating shaft, a driving gear is fixedly connected to the top end of the rotating shaft, a third bearing is fixedly connected to the top of the connecting plate close to the left side, a supporting column is inserted into an inner cavity of the third bearing, a driven gear is sleeved on the outer edge of the supporting column close to the top, the left side of the driving gear and the right side of the driven gear are arranged in a meshed mode, a movable plate is arranged on the top end of the supporting column, a clamping mechanism is arranged at the top of the movable plate, and an angle adjusting mechanism is arranged at the bottom of the movable plate.
Further, fixture includes two fixed plates, two equal fixed connection in fixed plate bottom is at the fly leaf top, and two the fixed plate uses fly leaf top center to be bilateral symmetry setting, two all seted up the through-hole on the fixed plate, two the through-hole inner chamber all runs through and is equipped with the supporting rod.
Furthermore, two the equal fixedly connected with grip block of one end that the supporting rod is close to fly leaf top center, two one side that the grip block is corresponding is the arc setting, two there is high pressure nozzle between the grip block, for laminating setting each other between high pressure nozzle outside edge and two grip blocks, two the equal fixedly connected with movable block in grip block bottom, the fly leaf top is close to center department and has seted up the spacing groove, two the movable block all is located the spacing inslot chamber, two the equal fixedly connected with movable block of one end that the supporting rod kept away from fly leaf top center, two the movable block all with adjacent fixed plate between the common fixedly connected with clamping spring, two the equal cover of clamping spring is established at adjacent supporting rod outside edge.
Further, angle adjustment mechanism includes the pipe, the pipe bottom is close to center department fixed connection on the support column top, pipe inner chamber left side fixedly connected with interlock spring, interlock spring right-hand member fixed connection trace, trace right side fixedly connected with fourth bearing, the trace axle has been pegged graft to the fourth bearing inner chamber, trace axle right-hand member runs through the pipe inner chamber to fixedly connected with commentaries on classics board, the equal fixedly connected with slide bar in trace top and bottom, two the equal fixedly connected with slider of one end that the trace block was kept away from to the slide bar, the equal spout has all been seted up near center department in pipe inner chamber top and bottom, two the slider all is located adjacent spout inner chamber.
Further, the outer edge of the linkage shaft is sleeved with a second cylinder close to the right end, the left end of the second cylinder is close to the edge and the right end of the circular tube is close to the equal fixedly connected with a plurality of tooth blocks of the edge, the left end of the second cylinder and the right end of the circular tube are arranged in a meshed mode, the left end of the circular tube is fixedly connected with a fifth bearing, a transmission shaft is inserted into an inner cavity of the fifth bearing, the left end of the transmission shaft is fixedly connected with the first cylinder, the top of the first cylinder and the top of the second cylinder are fixedly connected with connecting rods, and the top of the connecting rods is fixedly connected with the bottom of the movable plate.
Further, the box top is close to the equal fixedly connected with gag lever post in the left and right sides, the screwed pipe left and right sides is close to the equal fixedly connected with limiting plate of end department, two be close to center department on the limiting plate and all seted up spacing hole, two the gag lever post top all runs through adjacent spacing hole inner chamber to fixedly connected with stopper.
Furthermore, the bottom of the box body is fixedly connected with a plurality of universal wheels, and the universal wheels are arranged in a rectangular array shape by taking the center of the bottom of the box body as a central shaft.
Compared with the prior art, the utility model has the beneficial effects that:
through mutually supporting between each part, the device is convenient for remove, the flexibility of device has been increased, can be according to photovoltaic cell panel's high adjusting device's height, be convenient for wash photovoltaic cell panel, can make the high pressure nozzle left and right sides direction carry out 180 degrees rotations and spray, it is big to photovoltaic cell panel's washing scope, the cleaning efficiency is improved, simultaneously can be according to photovoltaic cell panel's inclination regulation high pressure nozzle's the angle that sprays, make the device better to photovoltaic cell panel's abluent effect, abluent cleaner, and be convenient for load and unload high pressure nozzle 25, be favorable to retrieving the device after the clearance is accomplished, and the operation is simple, high convenience and fast, and convenient to use.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of the present embodiment;
FIG. 2 is a top view of the driving half-gear of the present embodiment;
FIG. 3 is an enlarged view of FIG. 1 at A;
fig. 4 is an enlarged view of fig. 1 at B.
In the figure: 1. a box body; 2. a threaded post; 3. a driven bevel gear; 4. a rotating rod; 5. a drive bevel gear; 6. an L-shaped handle; 7. a threaded pipe; 8. a limiting plate; 9. a limiting rod; 10. a limiting block; 11. a connecting plate; 12. a motor; 13. a driving gear; 14. a driven gear; 15. a first cylinder; 16. a second cylinder; 17. rotating the plate; 18. a connecting rod; 19. a movable plate; 20. a fixing plate; 21. a clamping rod; 22. a clamping block; 23. a movable block; 24. a clamping spring; 25. a high pressure spray head; 26. a circular tube; 27. a linkage spring; 28. a linkage block; 29. moving the mass.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 4, a cleaning device for a photovoltaic cell panel comprises a box body 1, wherein first bearings are fixedly connected to the top and the bottom of the box body 1 near the center, threaded columns 2 are arranged in the two first bearing inner cavities in a penetrating manner, driven bevel gears 3 are sleeved on the outer edges of the threaded columns 2 near the bottom, second bearings are fixedly connected to the right side of the box body 1 near the center, rotating rods 4 are arranged in the second bearing inner cavities in a penetrating manner, driving bevel gears 5 are fixedly connected to the left ends of the rotating rods 4, the driven bevel gears 3 and the driving bevel gears 5 are arranged in a mutual meshing manner, an L-shaped handle 6 is fixedly connected to the right ends of the rotating rods 4, a threaded pipe 7 is arranged at the top of the box body 1 near the center, the top ends of the threaded columns 2 penetrate through the inner cavities of the threaded pipes 7, the outer edges of the threaded columns 2 and the inner cavities of the threaded pipes 7 are arranged in a mutual meshing manner, and a connecting plate 11 is fixedly connected to the top ends of the threaded pipes 7, a motor 12 is fixedly connected to the top of the connecting plate 11 near the right side, a rotating shaft is fixedly connected to a power output shaft of the motor 12, a driving gear 13 is fixedly connected to the top of the rotating shaft, a third bearing is fixedly connected to the top of the connecting plate 11 near the left side, a supporting column is inserted into an inner cavity of the third bearing, a driven gear 14 is sleeved on the outer edge of the supporting column near the top, the left side of the driving gear 13 and the right side of the driven gear 14 are in mutual engagement, a movable plate 19 is arranged at the top of the supporting column, a clamping mechanism is arranged at the top of the movable plate 19, an angle adjusting mechanism is arranged at the bottom of the movable plate 19, limiting rods 9 are fixedly connected to the top of the box body 1 near the left side and the right side, limiting plates 8 are fixedly connected to the left side and the right side of the threaded pipe 7 near the center, limiting holes are formed in the two limiting plates 8, the tops of the two limiting rods 9 penetrate through the adjacent inner cavities of the limiting holes, and are fixedly connected with limiting blocks 10, the bottom of the box body 1 is fixedly connected with a plurality of universal wheels which are arranged in a rectangular array shape by taking the center of the bottom of the box body 1 as a central shaft;
the clamping mechanism comprises two fixing plates 20, the bottoms of the two fixing plates 20 are fixedly connected to the top of the movable plate 19, the two fixing plates 20 are symmetrically arranged in a left-right mode by taking the center of the top of the movable plate 19 as a symmetry axis, through holes are formed in the two fixing plates 20, clamping rods 21 are arranged in the inner cavities of the two through holes in a penetrating mode, clamping blocks 22 are fixedly connected to one ends, close to the center of the top of the movable plate 19, of the two clamping rods 21, the corresponding sides of the two clamping blocks 22 are arranged in an arc mode, a high-pressure spray head 25 is arranged between the two clamping blocks 22, the outer edge of the high-pressure spray head 25 is attached to the two clamping blocks 22, moving blocks 29 are fixedly connected to the bottoms of the two clamping blocks 22, a limiting groove is formed in the position, close to the center of the top of the movable plate 19, the two moving blocks 29 are located in the inner cavities of the limiting groove, and moving blocks 23 are fixedly connected to one ends, far away from the center of the two clamping rods 21, far away from the top of the movable plate 19, the two movable blocks 23 and the adjacent fixed plate 20 are fixedly connected with a clamping spring 24 together, and the two clamping springs 24 are sleeved on the outer edges of the adjacent clamping rods 21 to play a role in clamping and fixing;
the angle adjusting mechanism comprises a round tube 26, the bottom of the round tube 26 close to the center is fixedly connected to the top end of the support column, the left side of the inner cavity of the round tube 26 is fixedly connected with a linkage spring 27, the right end of the linkage spring 27 is fixedly connected with a linkage block 28, the right side of the linkage block 28 is fixedly connected with a fourth bearing, the inner cavity of the fourth bearing is inserted with a linkage shaft, the right end of the linkage shaft penetrates through the inner cavity of the round tube 26 and is fixedly connected with a rotating plate 17, the top and the bottom of the linkage block 28 are fixedly connected with slide bars, one ends of the two slide bars far away from the linkage block 28 are fixedly connected with slide blocks, the top and the bottom of the inner cavity of the round tube 26 close to the center are respectively provided with slide grooves, the two slide blocks are respectively positioned in the adjacent inner cavities of the slide grooves, the outer edge of the linkage shaft is sleeved with a second round tube 16 close to the right end, the left end of the second round tube 16 close to the edge and the right end of the round tube 26 are respectively fixedly connected with a plurality of tooth blocks, the left end of the second round tube 16 are mutually meshed, 26 left end fixedly connected with fifth bearings of pipe, fifth bearing inner chamber are pegged graft and are had the transmission shaft, and transmission shaft left end fixedly connected with first drum 15, the equal fixedly connected with connecting rod 18 in first drum 15 top and the second drum 16 top, the top of two connecting rods 18 all with fly leaf 19 bottom fixed connection, play the effect of angle modulation.
The working principle is as follows: the utility model can drive the device to move through a plurality of universal wheels, thereby increasing the flexibility of the device, the L-shaped handle 6 is manually rotated, the rotating rod 4 is driven to rotate through the L-shaped handle 6, the driving bevel gear 5 is driven to rotate through the rotating rod 4, the driven bevel gear 3 is driven to rotate through the driving bevel gear 5, the threaded post 2 is driven to rotate through the driven bevel gear 3, the threaded pipe 7 is driven to move up and down through the threaded post 2, the photovoltaic cell panel can be conveniently cleaned according to the height of the height adjusting device of the photovoltaic cell panel by up and down moving the threaded pipe 7, the rotating shaft is driven to rotate through the motor 12 by starting the motor 12, the driving gear 13 is driven to rotate through the rotating shaft, the driven gear 14 is driven to rotate through the driving gear 13, the motor 12 is set to rotate forward 180 degrees and then rotate backward through 180 degrees, at the moment, the driven gear 14 is driven through the driving gear 13 to rotate forward 180 degrees and then rotate backward through 180 degrees, the spraying range of the high-pressure spray nozzle 25 is wide, the cleaning range of the photovoltaic cell panel is wide, the cleaning efficiency is improved, the rotating plate 17 is pulled rightwards manually, the left end of the second cylinder 16 is separated from the right end of the circular tube 26, the linkage block 28 is driven to move rightwards, the linkage spring 27 is driven to stretch by the linkage block 28 and the rotating plate 17 is rotated, the linkage shaft is driven to rotate by the rotating plate 17, the second cylinder 16 is driven to rotate by the linkage shaft, the adjacent connecting rod 18 is driven to rotate by the second cylinder 16, the movable plate 19 is driven to rotate by the connecting rod 18, the high-pressure spray nozzle 25 is driven to rotate by the movable plate 19, after the adjustment is completed, the second cylinder 16 is moved leftwards, the left end of the second cylinder 16 is meshed with the right end of the circular tube 26, the spraying angle of the high-pressure spray nozzle 25 can be adjusted according to the inclination angle of the photovoltaic cell panel, and the cleaning effect of the device on the photovoltaic cell panel is better, abluent cleaner, through two movable blocks 23 of manual removal, drive adjacent supporting rod 21 through two movable blocks 23 and remove, drive adjacent grip block 22 through two supporting rod 21 and remove, it is flexible to drive adjacent centre gripping spring 24 simultaneously to be convenient for load and unload high pressure nozzle 25, be favorable to retrieving the device after the clearance is accomplished, easy operation, convenient and fast, convenient to use.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (7)
1. The utility model provides a photovoltaic cell panel's cleaning equipment, includes box (1), its characterized in that: the improved bearing box is characterized in that the top and the bottom of the box body (1) are close to the center and are fixedly connected with first bearings, two first bearing inner cavities are jointly penetrated through and provided with a threaded column (2), the outer edge of the threaded column (2) is close to the bottom and is sleeved with a driven bevel gear (3), the right side of the box body (1) is close to the center and is fixedly connected with a second bearing, the inner cavity of the second bearing is penetrated through and provided with a rotating rod (4), the left end of the rotating rod (4) is fixedly connected with a driving bevel gear (5), the driven bevel gear (3) and the driving bevel gear (5) are arranged in a mutually meshed mode, the right end of the rotating rod (4) is fixedly connected with an L-shaped handle (6), the top of the box body (1) is close to the center and is provided with a threaded pipe (7), the top end of the threaded column (2) penetrates through the inner cavity of the threaded pipe (7), and the threaded column (2) and the outer edge of the threaded column (7) are arranged in a mutually meshed mode, screwed pipe (7) top fixedly connected with connecting plate (11), connecting plate (11) top is close to right side department fixedly connected with motor (12), motor (12) power output shaft fixedly connected with pivot, pivot top fixedly connected with driving gear (13), connecting plate (11) top is close to left side department fixedly connected with third bearing, the third bearing inner chamber is pegged graft and is had the support column, the support column outside edge is close to top department cover and is equipped with driven gear (14), driving gear (13) left side and driven gear (14) right side set up for intermeshing, there is fly leaf (19) support column top, fly leaf (19) top is equipped with fixture, fly leaf (19) bottom is equipped with angle adjusting mechanism.
2. The cleaning apparatus for photovoltaic panels according to claim 1, wherein: fixture includes two fixed plates (20), two equal fixed connection in fixed plate (20) bottom is at fly leaf (19) top, and two fixed plate (20) use fly leaf (19) top center to be bilateral symmetry setting, two the through-hole has all been seted up on fixed plate (20), two the through-hole inner chamber all runs through and is equipped with supporting rod (21).
3. A cleaning device for photovoltaic panels according to claim 2, characterised in that: one end of each clamping rod (21) close to the center of the top of the movable plate (19) is fixedly connected with a clamping block (22), one side of each clamping block (22) corresponding to each clamping block is arranged in an arc shape, a high-pressure spray head (25) is arranged between the two clamping blocks (22), the outer edge of the high-pressure spray head (25) is mutually attached to the two clamping blocks (22), the bottoms of the two clamping blocks (22) are fixedly connected with moving blocks (29), the top of the movable plate (19) is provided with a limiting groove near the center, the two moving blocks (29) are located in the inner cavity of the limiting groove, one ends, far away from the center of the top of the movable plate (19), of the two clamping rods (21) are fixedly connected with movable blocks (23), clamping springs (24) are fixedly connected between the two movable blocks (23) and the adjacent fixed plates (20) together, and the two clamping springs (24) are sleeved on the outer edges of the adjacent clamping rods (21).
4. The cleaning apparatus for photovoltaic panels according to claim 1, wherein: the angle adjusting mechanism comprises a circular tube (26), the bottom of the circular tube (26) close to the center is fixedly connected to the top end of the supporting column, a linkage spring (27) is fixedly connected to the left side of an inner cavity of the circular tube (26), a linkage block (28) is fixedly connected to the right end of the linkage spring (27), a fourth bearing is fixedly connected to the right side of the linkage block (28), a linkage shaft is inserted into an inner cavity of the fourth bearing, the right end of the linkage shaft penetrates through the inner cavity of the circular tube (26) and is fixedly connected with a rotating plate (17), sliding rods are fixedly connected to the top and the bottom of the linkage block (28), sliding blocks are fixedly connected to the ends, far away from the linkage block (28), of the two sliding rods, sliding grooves are formed in the top and the bottom of the inner cavity of the circular tube (26) close to the center, and the sliding blocks are located in adjacent inner cavities of the sliding grooves.
5. The cleaning apparatus for photovoltaic panels according to claim 4, wherein: the outer edge of the linkage shaft is close to the right end, and is sleeved with a second cylinder (16), the left end of the second cylinder (16) is close to the edge and is close to a plurality of tooth blocks of the equal fixedly connected with of the edge with the right end of a circular tube (26), the left end of the second cylinder (16) and the right end of the circular tube (26) are arranged in an meshed mode, a fifth bearing is fixedly connected to the left end of the circular tube (26), a transmission shaft is inserted into an inner cavity of the fifth bearing, the left end of the transmission shaft is fixedly connected with a first cylinder (15), the top of the first cylinder (15) and the top of the second cylinder (16) are fixedly connected with a connecting rod (18), and the top of the connecting rod (18) is fixedly connected with the bottom of a movable plate (19).
6. The cleaning apparatus for photovoltaic panels according to claim 1, wherein: the box (1) top is close to the equal fixedly connected with gag lever post (9) of the left and right sides, the screwed pipe (7) left and right sides is close to the equal fixedly connected with limiting plate (8) of end department, two be close to central department on limiting plate (8) and all seted up spacing hole, two gag lever post (9) top all runs through adjacent spacing hole inner chamber to fixedly connected with stopper (10).
7. The cleaning apparatus for photovoltaic panels according to claim 1, wherein: the bottom of the box body (1) is fixedly connected with a plurality of universal wheels, and the universal wheels are arranged in a rectangular array shape by taking the center of the bottom of the box body (1) as a central shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122763262.1U CN216574426U (en) | 2021-11-12 | 2021-11-12 | Cleaning equipment for photovoltaic cell panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122763262.1U CN216574426U (en) | 2021-11-12 | 2021-11-12 | Cleaning equipment for photovoltaic cell panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216574426U true CN216574426U (en) | 2022-05-24 |
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ID=81644348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122763262.1U Active CN216574426U (en) | 2021-11-12 | 2021-11-12 | Cleaning equipment for photovoltaic cell panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216574426U (en) |
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2021
- 2021-11-12 CN CN202122763262.1U patent/CN216574426U/en active Active
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