CN214767144U - Tracking type photovoltaic module cleaning device - Google Patents
Tracking type photovoltaic module cleaning device Download PDFInfo
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- CN214767144U CN214767144U CN202120889678.5U CN202120889678U CN214767144U CN 214767144 U CN214767144 U CN 214767144U CN 202120889678 U CN202120889678 U CN 202120889678U CN 214767144 U CN214767144 U CN 214767144U
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- 238000004140 cleaning Methods 0.000 title claims abstract description 113
- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- 230000000670 limiting effect Effects 0.000 claims description 29
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000004615 ingredient Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model provides a pursuit formula photovoltaic module cleaning device, the device includes: the device comprises a supporting plate, a transmission unit, a swinging unit, a driving unit and a cleaning brush; the two supporting plates are respectively arranged at the head end and the tail end of the tracking type photovoltaic assembly and are connected with the tracking rotating shaft; the two transmission units are respectively arranged on two sides of the tracking type photovoltaic assembly and are respectively connected with two sides of the two supporting plates, and each transmission unit is connected with one swinging unit and drives the swinging units to move along two sides of the tracking type photovoltaic assembly; the swinging unit is connected with a cleaning brush, and the cleaning brush is arranged across two ends of the solar panel; and a driving unit is arranged on at least one swinging unit and drives the cleaning brush to rotate. Aiming at the actual conditions that the cleaning efficiency of the prior tracking type photovoltaic module is low and the effect is not good, an automatic cleaning device is provided, and the device saves resources and improves the efficiency.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic power generation, in particular to pursuit formula photovoltaic module cleaning device.
Background
Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel, a controller and an inverter, and the main components of the system are electronic components. The solar cells are packaged and protected after being connected in series to form a large-area solar cell tracking type photovoltaic module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.
For photovoltaic power generation, the most important part affecting the power generation efficiency is the amount of optical power absorbed by the tracking photovoltaic module. Under the conditions of good illumination and cleanness of the tracking type photovoltaic module, the photovoltaic power generation can reach rated power, and the optimal power generation amount and economic benefit are achieved at the moment. Therefore, the core of maintenance work of each photovoltaic power station is to ensure the power absorption efficiency of the tracking type photovoltaic module, reflect the power absorption efficiency to actual operation, maintain the illumination condition, generally adopt the sun tracking type photovoltaic module, and the tracking type photovoltaic module is clean, namely, regularly clean up dirt on the tracking type photovoltaic module.
Photovoltaic electricityAll establish in the open air in station, pursuit formula photovoltaic module is easily influenced by the filth, and the filth mainly is dust and birds excrement and urine, and these fall on pursuit formula photovoltaic module for the luminousness reduces, and then photoelectric conversion efficiency reduces, and this has influenced pursuit formula photovoltaic module's output performance greatly. According to statistics, the dirt concentration reaches 4g/m2The power loss caused by the method can reach more than 22%.
The number of the tracking type photovoltaic modules of the photovoltaic power station is more than thousands of, the photovoltaic power station only depends on manpower to clean, wastes time and labor and is dragged into the photovoltaic power station to be large, and the effect is poor. Many research institutes and photovoltaic manufacturers are developing automated cleaning systems. At present, for a fixed tracking type photovoltaic module, corresponding cleaning vehicles and other equipment are available, but for the tracking type photovoltaic module, a set of automatic cleaning device which is put into use is not available. Most still rely on manual cleaning.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcoming of the prior art, the utility model aims to provide a pursuit formula photovoltaic module cleaning device, to the clean inefficiency of present pursuit formula photovoltaic module, the not good actual conditions of effect provides an automatic cleaning device, and the device saves the resource, the simple and convenient method of raising the efficiency.
In order to achieve the above object, the utility model provides a following technical scheme:
a tracking photovoltaic module cleaning device, comprising: the device comprises a supporting plate, a transmission unit, a swinging unit, a driving unit and a cleaning brush;
the two supporting plates are respectively arranged at the head end and the tail end of the tracking type photovoltaic assembly and are connected with the tracking rotating shaft;
the two transmission units are respectively arranged on two sides of the tracking type photovoltaic assembly and are respectively connected with two sides of the two supporting plates, and each transmission unit is connected with one swinging unit and drives the swinging units to move along two sides of the tracking type photovoltaic assembly;
the swinging unit is connected with a cleaning brush, and the cleaning brush is arranged across two ends of the solar panel; and a driving unit is arranged on at least one swinging unit and drives the cleaning brush to rotate.
As a further improvement of the present invention, the transmission unit includes a transmission motor, a guide wheel and a transmission belt; the transmission motor is arranged on the supporting plate and drives the guide wheel to rotate so as to drive the transmission belt to move.
As a further improvement, the swing unit comprises a support base and a swing rod, the support base is fixed on the transmission unit, the base is hinged with one end of the swing rod, and the other end of the swing rod is hinged with the cleaning brush.
As a further improvement of the utility model, the driving unit comprises a brush motor and a belt;
at least one swing unit side sets up a brush motor, and the brush motor drives the belt, and then drives the rotation of cleaning brush.
As a further improvement of the utility model, two of the supporting plates are both provided with a limiting device, and the swing unit is provided with a locking mechanism; when the swing unit triggers the limiting device at the tail end of the tracking type photovoltaic assembly, the clamping mechanism locks the swing unit, and when the swing unit triggers the limiting device at the head end of the tracking type photovoltaic assembly, the clamping mechanism releases the swing unit.
As a further improvement of the utility model, the limiting device comprises a baffle connected with the supporting plate and a trigger arranged on the baffle.
As a further improvement of the present invention, the height of the baffle is greater than the height of the swing unit.
As a further improvement of the utility model, the utility model also comprises a control center which is respectively electrically connected with the electric elements of the transmission unit and the driving unit, and the control center is electrically connected with the electric elements of the limiting device.
A cleaning method of a tracking type photovoltaic module cleaning device comprises the following steps:
the transmission unit drives the swing unit to move along two sides of the tracking type photovoltaic assembly; the driving unit drives the cleaning brush to rotate to clean the surface of the solar cell panel.
Also comprises a reciprocating cleaning step:
when the cleaning brush is arranged at the head end of the tracking type photovoltaic module, the surface of a first solar cell panel is cleaned, after one solar cell panel is cleaned, the cleaning brush moves along with the transmission unit, the cleaning brush leaves the cleaned solar cell panel, under the self-weight, the swinging rod falls to the lowest position until the swinging rod contacts the next solar cell panel, and the surface of the next solar cell panel is cleaned fully in sequence;
when the cleaning brush moves to the tail end of the tracking type photovoltaic assembly, the swinging unit triggers the limiting device; the clamping mechanism locks the swing unit to keep the cleaning brush at a high position; meanwhile, the transmission unit rotates reversely to drive the swing unit to move reversely along the two sides of the tracking type photovoltaic assembly to return to the head end;
when the swing unit triggers the limiting device at the head end of the tracking type photovoltaic module, the clamping mechanism loosens the swing unit; after the cleaning and starting are carried out again, the swinging unit drives the cleaning brush to be attached to the surface of the solar panel again.
Compared with the prior art, the beneficial effects of the utility model reside in that:
compare with the clean mode of current pursuit formula photovoltaic module, the utility model discloses a clean mode does not need manpower work, and is efficient, convenient to use, and the pursuit formula photovoltaic module cleanliness after the cleanness is good. And the cleaning device can be remotely operated by the control system to work periodically or work at any time when needed. The tracking type photovoltaic power station is particularly suitable for large tracking type photovoltaic power stations with multiple tracking type photovoltaic modules and large generating capacity.
According to the method, the cleaning brush is contacted with the solar cell panel, and the transmission unit drives the tracking type photovoltaic module to move along two sides; the driving unit drives the cleaning brush to rotate to clean the surface of the solar cell panel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of a typical tracking photovoltaic module.
Fig. 2 is an overall side view of the present invention.
Fig. 3 is an overall plan view of the present invention.
Fig. 4 is a schematic diagram of the control system of the present invention.
The tracking type photovoltaic module is marked with a reference number 1, a tracking type photovoltaic module 2, a brush motor 3, a transmission belt 4-1, a support base 4-2, a swing rod 5-1, a transmission motor 5-2, a guide wheel 6, a limiting device 7, a supporting plate 8, a cleaning brush 9, a belt 10 and a tracking rotating shaft 10.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 3, the utility model relates to a tracking formula photovoltaic module cleaning device, include: a support plate 7, a transmission unit, a swing unit, a driving unit and a cleaning brush 8;
the two supporting plates 7 are respectively arranged at the head end and the tail end of the tracking type photovoltaic module and are connected with the tracking rotating shaft 10;
the two transmission units are respectively arranged on two sides of the tracking type photovoltaic assembly and are respectively connected with two sides of the two supporting plates 7, and each transmission unit is connected with one swinging unit and drives the swinging units to move along two sides of the tracking type photovoltaic assembly;
the swinging unit is connected with a cleaning brush 8, and the cleaning brush 8 is arranged across two ends of the solar panel 1; at least one of the swing units is provided with a driving unit which drives the cleaning brush 8 to rotate.
As a preferred embodiment, as shown in FIG. 2, the transmission unit includes a transmission motor 5-1, a guide pulley 5-2 and a transmission belt 3; the transmission motor 5-1 is arranged on the supporting plate 7, and the transmission motor 5-1 drives the guide wheel 5-2 to rotate so as to drive the transmission belt 3 to move.
As a preferred embodiment, as shown in FIG. 2, the swing unit comprises a support base 4-1 and a swing rod 4-2, the support base 4-1 is fixed on the transmission unit, the base 4-1 is hinged with one end of the swing rod 4-2, and the other end of the swing rod 4-2 is hinged with a cleaning brush 8.
As a preferred embodiment, as shown in fig. 2 and 3, the driving unit includes a brush motor 2 and a belt 9; at least one swing unit side sets up a brush motor 2, and brush motor 2 drives belt 9, and then drives cleaning brush 8 rotatory.
As a preferred embodiment, as shown in fig. 2 and 3, two of the support plates 7 are provided with a limiting device 6, and the swing unit is provided with a locking mechanism; when the swing unit triggers the limiting device 6 at the tail end of the tracking type photovoltaic module, the clamping mechanism locks the swing unit, and when the swing unit triggers the limiting device 6 at the head end of the tracking type photovoltaic module, the clamping mechanism loosens the swing unit.
The control center is electrically connected with the electric elements of the transmission unit and the driving unit respectively, and the control center is electrically connected with the electric elements of the limiting device 6. The electric components include a motor, a trigger, and the like.
A cleaning method of a tracking type photovoltaic module cleaning device comprises the following steps:
the transmission unit drives the swing unit to move along two sides of the tracking type photovoltaic assembly; the driving unit drives the cleaning brush 8 to rotate to clean the surface of the solar panel 1.
Also comprises a reciprocating cleaning step:
when the cleaning brush 8 is arranged at the head end of the tracking type photovoltaic module, the surface of the first solar cell panel 1 is cleaned, after the cleaning of one solar cell panel 1 is finished, the cleaning brush 8 moves along with the continuous movement of the transmission unit, the cleaned solar cell panel 1 is separated from the cleaning brush 8, under the self weight, the swinging rod 4-2 falls to the lowest position until the cleaning brush contacts the next solar cell panel 1, and the surface cleaning of the next solar cell panel 1 is performed fully in sequence;
when the cleaning brush 8 moves to the tail end of the tracking type photovoltaic assembly, the swinging unit triggers the limiting device 6; the locking mechanism locks the swing unit and keeps the cleaning brush 8 at a high position; meanwhile, the transmission unit rotates reversely to drive the swing unit to move reversely along the two sides of the tracking type photovoltaic assembly to return to the head end;
when the swing unit triggers the limiting device 6 at the head end of the tracking type photovoltaic module, the clamping mechanism loosens the swing unit; after the cleaning is started again, the swinging unit drives the cleaning brush 8 to be attached to the surface of the solar panel 1 again.
The present invention will be described in detail with reference to the following embodiments and drawings.
Examples
As shown in fig. 1 to 3, a tracking-type photovoltaic module cleaning apparatus comprises a supporting plate 7 and a cleaning brush 8 based on a conventional tracking-type photovoltaic module; referring to fig. 1, the right side is the head end and the left side is the tail end. The cleaning device starts cleaning work from the right side.
The supporting plate 7 is connected with a tracking rotating shaft 10 of the tracking type photovoltaic module; a guide wheel 5-2 and a transmission belt 3 are erected on the supporting plate 7, the transmission belt 3 is connected with a cleaning brush 8 through a support 4, and the cleaning brush 8 is attached to the surface of the solar panel 1; the transmission motor 5-1 drives the guide wheel 5-2 to rotate, and further drives the transmission belt 3 to move;
the support 4 comprises a support base 4-1 and a swing rod 4-2, the support base 4-1 is fixed on the transmission belt 3, the base 4-1 is hinged with one end of the swing rod 4-2, and the other end of the swing rod 4-2 is hinged with the cleaning brush 8; the side surface of the bracket base 4-1 is connected with the brush motor 2, and the brush motor 2 drives the belt 9 to further drive the cleaning brush 8 to rotate.
And a limiting device 6 is arranged on the supporting plate 7. The limiting device 6 at the head end is a baffle forming an acute angle with the surface of the solar panel 1. The length of the swinging rod 4-2 is larger than the vertical distance between the high point of the solar panel 1 and the transmission belt 3.
The electric brush is characterized by further comprising a control center, wherein the control center is electrically connected with the brush motor 2 and the transmission motor 5-1 respectively. The limiting device 6 comprises a baffle connected with the supporting plate 7 and a trigger arranged on the baffle, and the trigger can be a piezoelectric sheet. The piezoelectric patch is electrically connected to the control hub. The height of the baffle is greater than that of the swing unit.
The end part of the cleaning brush 8 is provided with a bearing and a sleeve, the end part of the oscillating rod 4-2 is connected with the bearing, and the belt 9 is connected with the sleeve.
The cleaning method of the cleaning device comprises the following steps:
1) on the existing solar cell panel 1, each group of the solar cell panel is provided with a plurality of supporting plates 7 connected with a tracking rotating shaft 10 in series, guide wheels 5-2 and a transmission belt 3 are erected on the supporting plates 7, the transmission belt 3 is connected with a cleaning brush 8 through a support 4, and the cleaning brush 8 is attached to the surface of the solar cell panel 1;
2) the transmission motor 5-1 drives the guide wheel 5-2 to rotate, and further drives the transmission belt 3 to move;
3) the support base 4-1 is fixed on the transmission belt 3, the base 4-1 is hinged with one end of the oscillating rod 4-2, and the other end of the oscillating rod 4-2 is hinged with the cleaning brush 8;
4) the side surface of the bracket base 4-1 is connected with a brush motor 2, and the motor 2 drives a belt 9 to further drive a cleaning brush 8 to rotate;
5) when the belt 3 moves, the carriage 4, the cleaning brush 8 follows. The cleaning brush 8 moves obliquely upwards along the surface of the solar panel 1 under the geometric limiting action of the solar panel 1 and the bracket 4. At the same time, the brush motor 2 drives the cleaning brush 8 to rotate. The two are combined to play a role in cleaning the whole surface of the solar panel 1;
6) after one solar panel 1 is cleaned, the cleaning brush 8 moves along with the driving belt 3, leaves the cleaned solar panel 1, falls to the lowest position by the self weight of the swinging rod 4-2 until contacting the next solar panel 1, repeats 5), and performs the next cleaning;
7) the two ends of the cleaning brush 8 are both provided with a bracket 4 and a transmission belt 3, wherein the bracket 4 and the transmission belt 3 on one side have no power and only have the functions of driven and supporting;
8) a limiting device 6 is arranged beside a guide wheel 5-2 at the head and the tail of each string of solar panels 1, when the cleaning device runs to the tail, the support 4 is in contact with the limiting device 6, the support base 4-1 is triggered by the geometric shape of the limiting device 6, the swinging rod 4-2 is clamped, and the cleaning brush 8 is kept at a high position so that the cleaning device can be reset to the head of the solar panel 1. Meanwhile, the transmission motor 5-1 rotates reversely, and the cleaning device moves reversely to achieve the reset effect.
9) When the cleaning device moves back to the head, the support 4 is in contact with the limiting device 6, the support base 4-1 is triggered by the geometric shape of the limiting device 6, and the swinging rod 4-2 is not blocked. When cleaning again, the swing rod 4-2 drives the cleaning brush 8 to be attached to the surface of the solar panel 1 again.
The utility model relates to a pursuit formula photovoltaic module cleaning device carries out cleaning device and adds on the basis of having built photovoltaic power plant. And a large amount of construction is not needed. Referring to fig. 2, the principle of the present invention is to utilize a tracking type photovoltaic module to maintain or detect a period, a supporting plate 7 is installed on a tracking rotating shaft 10, a transmission motor 5-1, a guide wheel 5-2 and a limiting device 6 are installed on the supporting plate, a transmission belt 3 is connected on the guide wheel 5-2, a bracket base 4-1 is fixed on the transmission belt, a brush motor 2 and a swing rod 4-2 are installed on the bracket base 4-1, and the swing rod 4-2 is connected with a cleaning brush 8. After the whole adjusting position is adjusted, the cleaning brush 8 is placed at the bottom of the head solar cell panel 1.
The brush motor 2 and the transmission motor 5-2 have different functions, and the brush motor 2 should be selected to be of a type with a higher rotating speed, and the transmission motor 5-2 should be selected to be of a type with a lower rotating speed and a higher torque. Thus, the cleaning brush 8 can rotate rapidly, and the cleaning device can operate for a long time on each solar cell panel 1, so that the cleaning effect can be ensured.
The transmission motor 5-1 can be arranged for each group of cleaning devices independently or on the ground, so that one motor 5-1 can drive one or more sets of cleaning devices to move.
The cleaning device is operated outdoors, and attention should be paid to weather proofing and dust proofing, and the cleaning brush 8 is periodically cleaned and replaced.
To sum up, the utility model discloses clean respond well. The structure is simple, the automatic operation can be realized, the cost is low, the effect is good, and the method is suitable for popularization and application.
All articles and references disclosed above, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (8)
1. A tracking photovoltaic module cleaning device, comprising: the device comprises a supporting plate, a transmission unit, a swinging unit, a driving unit and a cleaning brush;
the two supporting plates are respectively arranged at the head end and the tail end of the tracking type photovoltaic assembly and are connected with the tracking rotating shaft;
the two transmission units are respectively arranged on two sides of the tracking type photovoltaic assembly and are respectively connected with two sides of the two supporting plates, and each transmission unit is connected with one swinging unit and drives the swinging units to move along two sides of the tracking type photovoltaic assembly;
the swinging unit is connected with a cleaning brush, and the cleaning brush is arranged across two ends of the solar panel; and a driving unit is arranged on at least one swinging unit and drives the cleaning brush to rotate.
2. The tracking photovoltaic module cleaning device as claimed in claim 1, wherein the transmission unit comprises a transmission motor, a guide wheel and a transmission belt; the transmission motor is arranged on the supporting plate and drives the guide wheel to rotate so as to drive the transmission belt to move.
3. The tracking photovoltaic module cleaning device as claimed in claim 1, wherein the swing unit comprises a support base and a swing rod, the support base is fixed on the transmission unit, the base is hinged to one end of the swing rod, and the other end of the swing rod is hinged to the cleaning brush.
4. The tracking photovoltaic module cleaning device as claimed in claim 1, wherein the drive unit comprises a brush motor and a belt;
at least one swing unit side sets up a brush motor, and the brush motor drives the belt, and then drives the rotation of cleaning brush.
5. The tracking photovoltaic module cleaning device as claimed in claim 1, 2, 3 or 4, wherein a limiting device is arranged on each of the two supporting plates, and a locking mechanism is arranged on the swinging unit; when the swing unit triggers the limiting device at the tail end of the tracking type photovoltaic assembly, the clamping mechanism locks the swing unit, and when the swing unit triggers the limiting device at the head end of the tracking type photovoltaic assembly, the clamping mechanism releases the swing unit.
6. The tracking photovoltaic module cleaning device as claimed in claim 5, wherein the limiting means comprises a baffle connected to the support plate and a trigger disposed on the baffle.
7. The tracking photovoltaic module cleaning device of claim 6, wherein the height of the baffle is greater than the height of the swinging unit.
8. The tracking photovoltaic module cleaning device according to claim 5, further comprising a control hub electrically connected to the electrical components of the transmission unit and the driving unit, respectively, and electrically connected to the electrical components of the position limiting device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120889678.5U CN214767144U (en) | 2021-04-27 | 2021-04-27 | Tracking type photovoltaic module cleaning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120889678.5U CN214767144U (en) | 2021-04-27 | 2021-04-27 | Tracking type photovoltaic module cleaning device |
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| CN214767144U true CN214767144U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145512A (en) * | 2021-04-27 | 2021-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Tracking type photovoltaic module cleaning device and cleaning method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145512A (en) * | 2021-04-27 | 2021-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Tracking type photovoltaic module cleaning device and cleaning method thereof |
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