CN111842258B - Self-cleaning on-board robot based on separation protective shell - Google Patents
Self-cleaning on-board robot based on separation protective shell Download PDFInfo
- Publication number
- CN111842258B CN111842258B CN202010608034.4A CN202010608034A CN111842258B CN 111842258 B CN111842258 B CN 111842258B CN 202010608034 A CN202010608034 A CN 202010608034A CN 111842258 B CN111842258 B CN 111842258B
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- shell
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- protective shell
- connecting rod
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- 238000004140 cleaning Methods 0.000 title claims abstract description 137
- 230000001681 protective effect Effects 0.000 title claims abstract description 65
- 238000000926 separation method Methods 0.000 title claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 238000010248 power generation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/50—Cleaning by methods involving the use of tools involving cleaning of the cleaning members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
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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
Landscapes
- Cleaning In General (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a self-cleaning robot on a board based on a separation protective shell, which comprises a cleaning device, a protective shell for accommodating the cleaning device, rails arranged on two sides of a main solar panel to be cleaned and an ash removal device positioned in the protective shell, wherein the protective shell comprises a shell and a shell door, a link mechanism is arranged between the shell and the shell door, the cleaning device touches the link mechanism when the rails travel to control the opening and closing of the shell door, and the ash removal device cleans dust of the cleaning device. When the cleaning device does not perform cleaning work, the cleaning device is contained in the protective shell, and the protective shell can protect the cleaning device from being corroded by natural environments such as wind, sunshine and the like, so that the stability of the cleaning device is improved, and the service life of the cleaning device is prolonged; casing fixed mounting is in orbital one end, and the shell door is opened towards the track, and dust removing device clears up the dust on the cleaning device, improves cleaning device's the efficiency of cleaning.
Description
Technical Field
The invention relates to the technical field of automatic robots, in particular to a self-cleaning robot on a board based on a separation protective shell.
Background
In recent years, with the improvement of living standard and the development of national new energy construction projects, the demand of China for new energy power generation is remarkably improved, and the solar power generation amount is more rapidly increased. In natural conditions, the problem of dust pollution is that the damage to the solar power generation efficiency and even the solar panel is the greatest, the dust can reduce the solar power generation efficiency, the hot spot effect can be caused, the damage of the solar panel is accelerated, and the solar power generation cost is greatly improved.
Most of solar cleaning mechanisms on the general market cannot give consideration to cleaning efficiency and cost, and even a part of solar panels are cleaned by manual cleaning and other low-efficiency cleaning modes at present. Part of solar panel cleaning devices are extremely high in cost, parts are complex, and some high-end cleaning technologies are not mature yet and are not beneficial to large-scale popularization and long-term use; the other part of the solar panel cleaning mode is still stopped in means such as high-pressure water gun washing, manual cleaning and the like, although the solar panel with various specifications can be cleaned, the water resource waste and the cleaning mode are low in efficiency, the maintenance cost of the solar panel is increased, the equipment volume is large, the occupied space is large, and the industrial popularization is difficult to carry out. Therefore, the cleaning effect and the popularization cost are simultaneously considered in the patent, a solution is provided, the characteristics of the solar panel cleaning and the wide requirements of the actual market are combined, and the on-board self-cleaning robot which is strong in protection, cost and good in cleaning effect is designed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a self-cleaning robot on a panel based on a separation protective shell, which can realize self-cleaning of a solar panel and has strong protectiveness and good cleaning effect.
The technical scheme of the invention is as follows: the utility model provides a robot on automatically cleaning board based on separation protective housing, includes cleaning device, is used for accomodating cleaning device's protective housing, sets up at the track of treating clean main solar panel both sides and the dust removal device who is located the protective housing, and the protective housing includes casing and shell door, is equipped with link mechanism between casing and the shell door, thereby cleaning device touches link mechanism when the track walking and controls opening and closing of shell door, and dust removal device clears up cleaning device's dust. When the cleaning device does not perform cleaning work, the cleaning device is contained in the protective shell, and the protective shell can protect the cleaning device from being corroded by natural environments such as wind, sunshine and the like, so that the stability of the cleaning device is improved, and the service life of the cleaning device is prolonged; casing fixed mounting is in orbital one end, and the shell door is opened towards the track, and dust removing device clears up the dust on the cleaning device, improves cleaning device's the efficiency of cleaning.
The ash removing device is a vibration type windshield wiper with an upper layer and a lower layer. Wherein, the protective housing is got back to after cleaning device has cleaned main solar panel, and the ash handling equipment vibrates the ash handling to cleaning device's brush for dust on the brush is beaten down, thereby realizes the anhydrous cleanness to the brush, guarantees next time to main solar panel's clean effect.
The protective housing is just to the track installation, and the casing top is equipped with vice solar panel and the first battery of accumulate for the cleaning device power supply. Wherein, the first battery stores the electric energy that vice solar panel produced and supplies power for cleaning device and dust removing device.
The shell and the shell door are connected through a hinge and a connecting rod mechanism, a handle is further fixed on the shell door, the connecting rod mechanism comprises a first connecting rod and a second connecting rod which are connected in a hinged mode, one end of the first connecting rod is installed on the shell, one end of the second connecting rod is installed on the shell door, and a first stud is arranged at the hinged position of the first connecting rod and the second connecting rod. The hinge and the connecting rod mechanism are connected with the shell and the shell door to ensure that the shell door can be opened and closed smoothly, and a notch which is hollowed to avoid interference with the main solar panel is formed in the shell door; the handle is vertically arranged on the shell door, when the cleaning device finishes work and returns to the protective shell, the handle collides with the second stud on the cleaning device, namely, the shell door is automatically closed under the driving of the cleaning device, a driving device for opening and closing the shell door is not required to be independently arranged, and the structure is simplified.
When the shell door is opened to be parallel to the track, the first connecting rod and the second connecting rod are located on the same straight line. Wherein, after the shell door is completely opened, the connecting rod mechanism is in a dead point state, thereby preventing the shell door from being automatically closed or interfering with the cleaning device due to external disturbance.
The cleaning device comprises two side plates, a hairbrush, a friction wheel, a first driving motor and a second driving motor, wherein the two side plates are located on two sides of a track, the hairbrush in a roller shape is installed between the two side plates, an output shaft of the first driving motor is connected with the hairbrush, the friction wheel comprises a driving friction wheel and a driven friction wheel, the driving friction wheel and the driven friction wheel are both in contact with the track, and an output shaft of the second driving motor is connected with the driving friction wheel. Wherein, the brush rotates on main solar panel and cleans the dust, improves and cleans efficiency, and the friction pulley drives whole cleaning device and walks on main solar panel, realizes the motion of device on the track based on the orbital frictional force of friction pulley pair.
The first driving motor and the second driving motor are both installed on the side plates, the driving friction wheel is located below the track, and the driven friction wheel is located above the track. The first driving motor and the second driving motor are arranged outside, the first driving motor and the second driving motor are convenient to replace and maintain, and the driving friction wheel and the driven friction wheel drive the cleaning device to run on the track together.
And a second battery for supplying power to the first driving motor and the second driving motor and a copper contact for charging the second battery are also arranged on the side plate. The first battery charges the second battery, and when the cleaning device is located in the protective shell, the contact of the first battery is in contact with the contact of the second battery.
And two horizontal second studs are arranged on the side plate. One of the second studs is in contact with the handle, and the other second stud is in contact with the first stud, so that the dead point state of the link mechanism is broken, and the shell door is closed.
The tangent direction of brush and main solar panel contact point is the direction of keeping away from the protective housing. Wherein, the direction of rotation of brush can make the dust on the main solar panel keep away from the protective housing when cleaning, prevents that the dust of sweeping up from falling in the protective housing.
The use principle and the working process of the self-cleaning panel robot based on the separated protective shell are that when the robot starts to work, the second driving motor controls the cleaning device to run along the tracks arranged on the two sides of the main solar panel, the shell door is pushed open by the cleaning device, and when the shell door is completely opened, the connecting rod mechanism is in a dead point position, namely the first connecting rod and the second connecting rod are collinear, so that the cleaning device cannot interfere with the protective shell when being opened; when the cleaning device works, the first driving motor controls the hairbrush to rotate, meanwhile, the second driving motor which controls the cleaning device to move drives the cleaning device to move back and forth on the main solar panel at a certain speed, after the cleaning work is finished, the second driving motor can drive the cleaning device to return to the protective shell, the second stud collides with the handle of the protective shell to drive the shell door to be closed, and after the second driving motor stops rotating, the hairbrush continues to rotate and vibrates for removing dust under the action of the dust removing device; meanwhile, the contact for charging the second battery is in contact with the contact of the first battery which is in charge of charging on the protective shell, and the cleaning device starts to be charged so as to be ready for next cleaning work.
Compared with the prior art, the invention has the following beneficial effects:
the self-cleaning on-board robot based on the separation protective shell provides a cleaning robot with a protective shell and a cleaning device and integrated working process; the protective shell can prolong the service life of the cleaning device, the protective shell is provided with a link mechanism for automatically opening and closing the door, electric energy control is not needed, the separated protective shell can reduce the weight of the device during cleaning, and each main part of the modularized design mode is separated to operate, so that the failure rate is reduced; the dust removing device can improve the cleaning effect of the cleaning device, the structure of the whole device is simplified, the manufacturing cost is reduced, large-scale popularization and daily maintenance are facilitated, and therefore the low-efficiency cleaning work which is originally completed by manpower and a high-pressure water gun can be replaced.
Drawings
Fig. 1 is a schematic structural diagram of a self-cleaning robot on board based on a separation protective shell.
Fig. 2 is a top view of a self-cleaning robot on board based on a separation containment vessel.
Fig. 3 is a schematic structural view of the case door.
Fig. 4 is a schematic structural view of the cleaning device.
Fig. 5 is a schematic structural view of one side of the cleaning device.
Fig. 6 is a schematic view of the other side of the cleaning device.
In the figure, 1 is a protective case, 2 is a case door, 3 is a main solar panel, 4 is a brush, 5 is a second driving motor, 6 is a second battery, 7 is an auxiliary solar panel, 8 is a first side plate, 9 is a hinge, 10 is a second side plate, 11 is a second stud, 12 is an ash removal device, 13 is a rail, 14 is a handle, 15 is a link mechanism, 16 is a driving friction wheel, 17 is a driven friction wheel, and 18 is a first stud.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Examples
The embodiment is a self-cleaning robot on board based on a separation protective shell, and as shown in fig. 1 and 2, the self-cleaning robot on board comprises a cleaning device, a protective shell 1 for accommodating the cleaning device, rails 13 arranged on two sides of a main solar panel 3 to be cleaned, and an ash removal device 12 positioned in the protective shell, wherein the protective shell comprises a shell body and a shell door 2, a link mechanism is arranged between the shell body and the shell door, the cleaning device touches the link mechanism when the cleaning device travels on the rails so as to control the opening and closing of the shell door, and the ash removal device cleans dust of the cleaning device. When the cleaning device does not perform cleaning work, the cleaning device is contained in the protective shell, and the protective shell can protect the cleaning device from being corroded by natural environments such as wind, sunshine and the like, so that the stability of the cleaning device is improved, and the service life of the cleaning device is prolonged; casing fixed mounting is in orbital one end, and the shell door is opened towards the track, and dust removing device clears up the dust on the cleaning device, improves cleaning device's the efficiency of cleaning.
The ash removing device is a vibration type windshield wiper with an upper layer and a lower layer, and a vibrator is arranged on the windshield wiper. Wherein, the protective housing is got back to after cleaning device has cleaned main solar panel, and the ash handling equipment vibrates the ash handling to cleaning device's brush for dust on the brush is beaten down, thereby realizes the anhydrous cleanness to the brush, guarantees next time to main solar panel's clean effect.
The protective housing is just to the track installation, and the casing top is equipped with the first battery of vice solar panel 7 and the accumulate for the cleaning device power supply. Wherein, the first battery stores the electric energy that vice solar panel produced and supplies power for cleaning device and dust removing device.
As shown in fig. 3, the shell and the shell door are connected through a hinge 9 and a link mechanism 15, a handle 14 is further fixed on the shell door, the link mechanism includes a first link and a second link which are connected in a hinged manner, one end of the first link is installed on the shell, one end of the second link is installed on the shell door, and a first stud 18 is arranged at the hinged position of the first link and the second link. The hinge and the connecting rod mechanism are connected with the shell and the shell door to ensure that the shell door can be opened and closed smoothly, and a notch which is hollowed to avoid interference with the main solar panel is formed in the shell door; the handle is vertically arranged on the shell door, when the cleaning device finishes work and returns to the protective shell, the handle collides with the second stud 11 on the cleaning device, namely, the shell door is automatically closed under the driving of the cleaning device, a driving device for opening and closing the shell door is not required to be independently arranged, and the structure is simplified.
When the shell door is opened to be parallel to the track, the first connecting rod and the second connecting rod are located on the same straight line. Wherein, after the shell door is completely opened, the connecting rod mechanism is in a dead point state, thereby preventing the shell door from being automatically closed or interfering with the cleaning device due to external disturbance.
As shown in fig. 4-6, the cleaning device comprises two side plates, a brush 4, a friction wheel, a first driving motor and a second driving motor 5, the two side plates are located on two sides of the track and respectively comprise a first side plate 8 and a second side plate 10, the roller-shaped brush is installed between the two side plates, an output shaft of the first driving motor is connected with the brush, the friction wheel comprises a driving friction wheel 16 and a driven friction wheel 17, the driving friction wheel and the driven friction wheel are both in contact with the track, and an output shaft of the second driving motor is connected with the driving friction wheel. Wherein, the brush rotates on main solar panel and cleans the dust, improves and cleans efficiency, and the friction pulley drives whole cleaning device and walks on main solar panel, realizes the motion of device on the track based on the orbital frictional force of friction pulley pair.
The first driving motor and the second driving motor are both installed on the side plates, the driving friction wheel is located below the track, and the driven friction wheel is located above the track. The first driving motor and the second driving motor are arranged outside, the first driving motor and the second driving motor are convenient to replace and maintain, and the driving friction wheel and the driven friction wheel drive the cleaning device to run on the track together.
And a second battery 6 for supplying power to the first driving motor and the second driving motor and a copper contact for charging the second battery are also arranged on the side plate. The first battery charges the second battery, and when the cleaning device is located in the protective shell, the contact of the first battery is in contact with the contact of the second battery.
And two horizontal second studs are arranged on the side plate. One of the second studs is in contact with the handle, and the other second stud is in contact with the first stud, so that the dead point state of the link mechanism is broken, and the shell door is closed.
The tangent direction of brush and main solar panel contact point is the direction of keeping away from the protective housing. Wherein, the direction of rotation of brush can make the dust on the main solar panel keep away from the protective housing when cleaning, prevents that the dust of sweeping up from falling in the protective housing.
The use principle and the working process of the self-cleaning panel robot based on the separated protective shell are that when the robot starts to work, the second driving motor controls the cleaning device to run along the tracks arranged on the two sides of the main solar panel, the shell door is pushed open by the cleaning device, and when the shell door is completely opened, the connecting rod mechanism is in a dead point position, namely the first connecting rod and the second connecting rod are collinear, so that the cleaning device cannot interfere with the protective shell when being opened; when the cleaning device works, the first driving motor controls the hairbrush to rotate, meanwhile, the second driving motor which controls the cleaning device to move drives the cleaning device to move back and forth on the main solar panel at a certain speed, after the cleaning work is finished, the second driving motor can drive the cleaning device to return to the protective shell, the second stud collides with the handle of the protective shell to drive the shell door to be closed, and after the second driving motor stops rotating, the hairbrush continues to rotate and vibrates for removing dust under the action of the dust removing device; meanwhile, the contact for charging the second battery is in contact with the contact of the first battery which is in charge of charging on the protective shell, and the cleaning device starts to be charged so as to be ready for next cleaning work.
As mentioned above, the present invention can be better realized, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. A self-cleaning robot on a panel based on a separation protective shell is characterized by comprising a cleaning device, a protective shell for containing the cleaning device, rails arranged on two sides of a main solar panel to be cleaned and an ash removal device positioned in the protective shell, wherein the protective shell comprises a shell body and a shell door, a connecting rod mechanism is arranged between the shell body and the shell door, the cleaning device touches the connecting rod mechanism when the rails travel to control the opening and closing of the shell door, and the ash removal device cleans dust of the cleaning device;
the ash removing device is a vibration type windshield wiper with an upper layer and a lower layer;
the shell and the shell door are connected through a hinge and a connecting rod mechanism, the shell door is further fixedly provided with a handle, the connecting rod mechanism comprises a first connecting rod and a second connecting rod which are hinged, one end of the first connecting rod is installed on the shell, one end of the second connecting rod is installed on the shell door, and a first stud is arranged at the hinged position of the first connecting rod and the second connecting rod;
when the shell door is opened to be parallel to the track, the first connecting rod and the second connecting rod are located on the same straight line.
2. A self-cleaning robot on board based on a separating protective shell as claimed in claim 1, characterized in that the protective shell is mounted right opposite to the rail, above which there are secondary solar panels for supplying power to the cleaning device and first batteries for storing electricity.
3. The self-cleaning robot on board based on the separation protective shell as claimed in claim 1, wherein the cleaning device comprises two side plates, a brush, a friction wheel, a first driving motor and a second driving motor, the two side plates are positioned on two sides of the track, the roller-shaped brush is installed between the two side plates, an output shaft of the first driving motor is connected with the brush, the friction wheel comprises a driving friction wheel and a driven friction wheel, the driving friction wheel and the driven friction wheel are both in contact with the track, and an output shaft of the second driving motor is connected with the driving friction wheel.
4. The self-cleaning robot on board based on separation protective shell of claim 3, wherein the first driving motor and the second driving motor are both installed on the side plate, the driving friction wheel is located below the track, and the driven friction wheel is located above the track.
5. A self-cleaning robot on board based on a separation protective shell as claimed in claim 3, characterized in that a second battery for supplying power to the first driving motor and the second driving motor and a copper contact for charging the second battery are further arranged on the side plate.
6. A self-cleaning robot on board based on separation protective shell as claimed in claim 3, characterized in that two horizontal second studs are provided on the side plate.
7. A self-cleaning robot on board based on a separate protective case as claimed in claim 3, wherein the tangent direction of the contact point of the brush with the main solar panel is away from the protective case.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010608034.4A CN111842258B (en) | 2020-06-30 | 2020-06-30 | Self-cleaning on-board robot based on separation protective shell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010608034.4A CN111842258B (en) | 2020-06-30 | 2020-06-30 | Self-cleaning on-board robot based on separation protective shell |
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| CN111842258A CN111842258A (en) | 2020-10-30 |
| CN111842258B true CN111842258B (en) | 2021-10-26 |
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| CN202010608034.4A Expired - Fee Related CN111842258B (en) | 2020-06-30 | 2020-06-30 | Self-cleaning on-board robot based on separation protective shell |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113000432A (en) * | 2021-03-22 | 2021-06-22 | 华南理工大学 | Cleaning device adaptable to solar cell panels with different thicknesses |
| CN113472288A (en) * | 2021-07-16 | 2021-10-01 | 珠海思略智能科技有限公司 | Shutdown warehouse device and photovoltaic system |
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| CN107812732A (en) * | 2017-11-29 | 2018-03-20 | 济南纽兰智能科技有限公司 | One kind tiling photovoltaic plant Intelligent sweeping machine device people |
| CN108856059A (en) * | 2018-07-31 | 2018-11-23 | 芜湖通全电子电器科技创业有限公司 | A kind of new-energy automobile solar battery cleaning apparatus for self |
| CN208690761U (en) * | 2018-09-20 | 2019-04-02 | 航变电力科技有限公司 | A kind of ring network cabinet |
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| CN111842258A (en) | 2020-10-30 |
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