CN113385448A - Photovoltaic module cleaning device - Google Patents
Photovoltaic module cleaning device Download PDFInfo
- Publication number
- CN113385448A CN113385448A CN202110750485.6A CN202110750485A CN113385448A CN 113385448 A CN113385448 A CN 113385448A CN 202110750485 A CN202110750485 A CN 202110750485A CN 113385448 A CN113385448 A CN 113385448A
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- CN
- China
- Prior art keywords
- dust
- photovoltaic module
- suction port
- module cleaning
- hollow interior
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 51
- 239000000428 dust Substances 0.000 claims abstract description 175
- 238000007790 scraping Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000000740 bleeding effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
-
- 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
-
- 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)
Abstract
The invention provides a photovoltaic module cleaning device which comprises a dust removing part and an air suction device, wherein the dust removing part comprises a dust removing part body with a hollow interior and a dust suction port, the dust suction port is communicated with the hollow interior, a dust removing scraper blade is arranged on the dust removing part body, the opening direction of the dust suction port is the same as the direction of a dust scraping surface of the dust removing scraper blade, and the dust suction port is communicated with the air suction port of the air suction device through the hollow interior. This cleaning device adopts the photovoltaic module surface cleaning mode of scraping dirt and dust absorption combination, when striking off photovoltaic module surface dust, through the effect of bleeding, in time clears away the photovoltaic module surface with the dust on the photovoltaic module surface, especially the dust of scraping by the dust removal scraper blade, has avoided the dust to the secondary pollution on photovoltaic module surface.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic power generation, in particular to a photovoltaic module cleaning device.
Background
The basic operating principle of photovoltaic power generation is to convert solar energy into electrical energy through a photovoltaic module. The photovoltaic modules are arranged in rows and columns to form photovoltaic square matrixes, and the photovoltaic power station is formed by a plurality of photovoltaic square matrixes. The surface of the photovoltaic module is provided with a layer of glass, sunlight irradiates a photovoltaic cell in the photovoltaic module through the glass to form electric energy, the solar energy generating capacity is seriously reduced when dust is accumulated on the surface of the photovoltaic module, and the surface of the photovoltaic module needs to be frequently cleaned to ensure the photovoltaic power generation capacity in order to ensure the electric energy generated by photovoltaic power generation.
The existing surface cleaning mode of the photovoltaic module mainly comprises the following steps: 1. utilize compressed air to sweep the dust, this clean mode sweeps the effect not good to the dust under the humid environment, and has the problem that blows the dust whereabouts and pollute photovoltaic module once more. 2. The cleaning brush is used for washing, the cleaning mode has dependence on conditions such as water source, air temperature and the like, and the residual water after cleaning is easy to be stained with ash for the second time. 3. Utilize electric brush clean, this clean mode need frequently change the brush, and has the dust on the brush to scatter to photovoltaic module's problem once more.
From the above, the existing photovoltaic module cleaning devices have the problems of limited use conditions and incomplete cleaning, and particularly influence on the cleaning effect due to secondary pollution.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a photovoltaic module cleaning device.
The photovoltaic module cleaning device comprises: the dust removal part comprises a dust removal part body with a hollow interior, a dust suction port is formed in the dust removal part body and communicated with the hollow interior, a dust removal scraper blade is arranged on the dust removal part body, and the opening direction of the dust suction port is the same as the direction of a dust scraping surface of the dust removal scraper blade; and the dust suction port is communicated with a suction port of the air suction device through the hollow interior of the dust removing part body.
The photovoltaic module cleaning device provided by the invention adopts a photovoltaic module surface cleaning mode combining dust scraping and dust collection, and can remove dust on the surface of the photovoltaic module, especially dust scraped by the dust-removing scraper blade, from the surface of the photovoltaic module in time through the air suction effect of the air suction device while scraping the dust on the surface of the photovoltaic module by using the dust-removing scraper blade, so that secondary pollution of the dust on the surface of the photovoltaic module is avoided. Moreover, the cleaning mode does not need water, the dust removal scraper blade does not need to be frequently replaced, the dust deposited on the surface of the photovoltaic module in a humid environment can be effectively removed, the application range is wide, and the use is convenient.
In addition, the photovoltaic module cleaning device according to the invention has the following additional technical features:
in some embodiments, the relative arrangement direction of the dust suction opening and the dust removing scraper is consistent with the dust scraping direction of the dust removing scraper.
In some embodiments, the cleaning opening comprises more than two.
In some embodiments, the dust suction ports are distributed on both sides of the dust removal blade.
In some embodiments, the dust removing part body is connected to the air suction device through a connecting pipe, the hollow interior of the dust removing part body is communicated with the air suction port of the air suction device through the connecting pipe, the connecting pipe is a rigid pipe, and two ends of the connecting pipe are respectively and rigidly connected to the dust removing part body and the air suction device.
In some embodiments, the dust collector body includes a dust collecting chamber as or as part of the hollow interior, the dust collecting chamber having a width that gradually narrows from near the dust suction opening to a direction away from the dust suction opening.
In some embodiments, the suction device has an exhaust port to which a dust exhaust pipe is connected.
In some embodiments, the dust exhaust pipe is a flexible telescopic pipe.
In some embodiments, the getter device is a getter pump.
In some embodiments, the dusting scraper is integrally formed with or removably attached to the dusting portion body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic front view of a photovoltaic module cleaning apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic side view of the photovoltaic module cleaning apparatus shown in fig. 1.
Fig. 3 is a schematic view of the use of a photovoltaic module cleaning apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic view showing a flow direction of dust when the photovoltaic module cleaning apparatus according to the embodiment of the present invention is in use.
Reference numerals:
a dust removing part 1; a dust removing part body 11; a dust suction port 12; a dust removal scraper 13; a getter pump 2; a connecting pipe 3; a dust exhaust pipe 4; a photovoltaic module 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides a photovoltaic module cleaning device which mainly comprises a dust removing part and an air suction device. The dust removing part comprises a dust removing part body with a hollow interior, the dust removing part body is provided with a dust suction port, and the dust suction port is communicated with the hollow interior of the dust removing part body. The dust removing part body is also provided with a dust removing scraper, and the opening direction of the dust suction port is the same as the direction of the dust scraping surface of the dust removing scraper. The air suction device is provided with an air suction port and an air exhaust port, and a dust suction port formed in the dust removing part body is communicated with the air suction port of the air suction device through the hollow interior of the dust removing part body.
The photovoltaic module cleaning device provided by the invention adopts a photovoltaic module surface cleaning mode combining dust scraping and dust collection, and can remove dust on the surface of the photovoltaic module, especially dust scraped by the dust-removing scraper blade, from the surface of the photovoltaic module in time through the air suction effect of the air suction device while scraping the dust on the surface of the photovoltaic module by using the dust-removing scraper blade, so that secondary pollution of the dust on the surface of the photovoltaic module is avoided. Moreover, the cleaning mode does not need water, the dust removal scraper blade does not need to be frequently replaced, and the cleaning mode is particularly suitable for removing dust deposited on the surface of the photovoltaic module in a humid environment and is convenient to use. The photovoltaic module cleaning device provided by the invention can be suitable for various environments such as rain, snow, wind, frost, humidity, dryness and the like, and is wide in application range.
Several specific embodiments of the photovoltaic module cleaning apparatus provided by the present invention are described in detail below with reference to fig. 1-4.
The first embodiment is as follows:
as shown in fig. 1-2. In this embodiment, the photovoltaic module cleaning apparatus includes a dust removing portion 1 and a getter pump 2 as a getter device.
The dust removing part 1 comprises a dust removing part body 11, and a dust suction port 12 is formed on the dust removing part body 11. A dust removal scraper 13 is also provided on the dust removal part body 11 near the dust suction port 12. As shown in fig. 2, in this embodiment, the dust removing scraper 13 and the dust removing part body 11 are detachably connected by bolts, but in other embodiments, other detachable connection methods or an integral molding method may be adopted to form an integral body. In this embodiment, the dust-removing scraper 13 is a plastic scraper because the plastic has the characteristics of flatness, toughness, wear resistance, etc. Preferably, the width of the dust removal scraper 13 is the same as the width of the glass of the photovoltaic module 5, so that the cleaning efficiency can be improved, and dust can be scraped off at one time.
The dust removing part body 11 includes a hollow interior formed as a dust collecting chamber in this embodiment, the width of which gradually narrows from a direction close to the dust suction opening 12 to a direction away from the dust suction opening 12. In other embodiments, the hollow interior may also include other components in addition to the dirt collection chamber, such as a conduit extending outwardly from the narrower end of the dirt collection chamber, or in alternative embodiments, the dirt collection chamber portion may be replaced with a tube, and so forth.
As shown in fig. 1 to 3, in the present embodiment, the relative arrangement direction of the dust suction port 12 and the dust removing blade 13 is preferably the same as the dust scraping direction of the dust removing blade 13, and by adopting this arrangement, the dust scraped by the dust removing blade 13 can be sucked and removed through the dust suction port 12 in time. In view of the similar considerations, as employed in the present embodiment, it is preferable that the dust removal blade 13 is aligned with the lengthwise extension direction of the dust suction port 12, and that the effective dust removal length of the dust removal blade 13 is equal to the effective dust suction length of the dust suction port 12. For the present invention, the number of the dust suction ports 12 is not limited to only one in the embodiment, but may include two or more, and may be located on one side or distributed on both sides of the dust removing blade 13.
The getter pump 2 has a suction port and a discharge port. The dust removing unit body 11 is connected to the suction pump 2 through a connection pipe 3, and the hollow interior of the dust removing unit body 11 is communicated with the suction port of the suction pump 2. In this embodiment, the connection pipe 3 is a rigid pipe, for example, a circular steel pipe, and both ends of the connection pipe 3 are rigidly connected to the dust removing unit body 11 and the suction pump 2, respectively. As shown in fig. 3, when the photovoltaic module cleaning device provided by the embodiment is used, an operator can directly hold the connecting pipe 3 by hand to perform scraping operation, so that the use is convenient and labor-saving. In addition, as shown in FIGS. 1-3, a rigid tube may also be attached to the discharge port of the getter pump 2 to provide a more flexible grip. In this case, the getter device is preferably light and compact, for example, a miniature getter pump is commercially available or customized according to the power and other parameters. Alternatively, the getter pump is an oil or electric pump that can be self-driven, i.e., without an external power source or drive device. The air suction pump is preferably an oil pump which can be used for air suction by adding gasoline/diesel oil or a storage battery, and is portable and light so as to be better suitable for the environment of a power plant.
As shown in fig. 1-2, a dust exhaust pipe 4 is indirectly (in other embodiments, directly) connected to the exhaust port of the getter pump 2, and the dust exhaust pipe 4 is a flexible telescopic pipe, such as a corrugated pipe. As shown in fig. 4, the dust exhaust pipe 4 can passively or freely fall toward the ground during the dust removing operation, and the dust sucked from the dust suction port 12 can be transferred to the ground through the suction pump 2 and then through the dust exhaust pipe 4, thereby more effectively preventing or reducing the secondary pollution of the scraped dust to the surface of the photovoltaic module. In other embodiments, a dust collecting container can be further arranged, the dust collecting container is communicated with the exhaust port of the suction device through a pipeline, and cleaned dust is collected to be subjected to subsequent treatment.
Example two:
the photovoltaic module cleaning device provided by the embodiment is similar to the embodiment, and only different points are described here. In this embodiment, the connection pipe is a flexible pipe, so that the suction device can be relatively fixed and only the dust removing part is moved when the dust removing operation is performed.
Example three:
the photovoltaic module cleaning device provided by the embodiment is similar to the embodiment, and only different points are described here. In the implementation, one end of the rigid connecting pipe is rigidly connected with the dust removing part body, and the other end of the rigid connecting pipe is connected with the air suction device through the flexible pipe, so that the air suction device can be relatively fixedly arranged when dust removing operation is carried out, and the movement of the dust removing part is still realized by the handheld connecting pipe, thereby being convenient and labor-saving.
In summary, the photovoltaic module cleaning device provided by the embodiment of the invention has the following beneficial effects:
1. this cleaning device adopts the photovoltaic module surface cleaning mode of scraping dirt and dust absorption combination, can utilize the dust removal scraper blade to strike off the dust on photovoltaic module surface, through the effect of bleeding of getter device, in time clears away the dust on the photovoltaic module surface, has avoided the dust to the secondary pollution on photovoltaic module surface.
2. This cleaning device does not consume the water resource, and the dust removal scraper blade need not often to be changed, is particularly useful for getting rid of the deposition of depositing on the photovoltaic module surface under the humid environment, and application scope is wide, and is convenient to use.
3. This cleaning device can adopt scrapes dirt, dust absorption, leads the dirt, the clean scheme that the dust exhaust goes on simultaneously, through the integral type scrape dirt, dust absorption, lead dirt and dust exhaust structure, clean efficiency is higher, and clean effect is better.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A photovoltaic module cleaning device, comprising:
the dust removal part comprises a dust removal part body with a hollow interior, a dust suction port is formed in the dust removal part body and communicated with the hollow interior, a dust removal scraper blade is arranged on the dust removal part body, and the opening direction of the dust suction port is the same as the direction of a dust scraping surface of the dust removal scraper blade;
and the dust suction port is communicated with a suction port of the air suction device through the hollow interior of the dust removing part body.
2. The photovoltaic module cleaning device as recited in claim 1, wherein the relative arrangement direction of the dust suction port and the dust removal scraper is consistent with the dust scraping direction of the dust removal scraper.
3. The photovoltaic module cleaning apparatus of claim 2, wherein the suction opening comprises more than two.
4. The photovoltaic module cleaning apparatus of claim 3, wherein the dust suction ports are distributed on both sides of the dust removal blade.
5. The photovoltaic module cleaning device according to claim 1, wherein the dust removing body is connected to the air suction device through a connecting pipe, the hollow interior of the dust removing body is communicated with the air suction port of the air suction device through the connecting pipe, the connecting pipe is a rigid pipe, and both ends of the connecting pipe are rigidly connected to the dust removing body and the air suction device respectively.
6. The photovoltaic module cleaning device according to claim 1 or 5, wherein the dust collector body includes a dust collecting chamber as the hollow interior or as a part of the hollow interior, and a width of the dust collecting chamber is gradually narrowed from a direction close to the dust suction port to a direction away from the dust suction port.
7. The photovoltaic module cleaning apparatus according to claim 1, wherein the suction device has an exhaust port to which a dust exhaust pipe is connected.
8. The photovoltaic module cleaning apparatus of claim 7, wherein the dust exhaust duct is a flexible, telescoping duct.
9. The photovoltaic module cleaning apparatus of claim 1, 7 or 8, wherein the getter device is a getter pump, and the getter pump is a self-driven getter pump.
10. The photovoltaic module cleaning device of claim 1, wherein the dust removal blade is integrally formed with or removably attached to the dust removal portion body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110750485.6A CN113385448A (en) | 2021-07-02 | 2021-07-02 | Photovoltaic module cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110750485.6A CN113385448A (en) | 2021-07-02 | 2021-07-02 | Photovoltaic module cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113385448A true CN113385448A (en) | 2021-09-14 |
Family
ID=77625070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110750485.6A Pending CN113385448A (en) | 2021-07-02 | 2021-07-02 | Photovoltaic module cleaning device |
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| Country | Link |
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| CN (1) | CN113385448A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100005618A1 (en) * | 2008-07-11 | 2010-01-14 | Fujitsu Limited | Dust tray |
| CN101801251A (en) * | 2007-07-09 | 2010-08-11 | S.C.约翰逊父子公司 | Handheld portable devices for touchless particulate matter removal |
| CN202438498U (en) * | 2012-03-01 | 2012-09-19 | 深圳先进储能材料国家工程研究中心有限公司 | Automatic cleaning dust-removal system of photovoltaic assembly |
| CN204005689U (en) * | 2014-07-18 | 2014-12-10 | 张峻齐 | Static is except haze street lamp |
| US20190039103A1 (en) * | 2017-08-01 | 2019-02-07 | Robert M. Morris, SR. | Popcorn Ceiling Eliminator |
| CN212349551U (en) * | 2020-04-13 | 2021-01-15 | 晶澳（邢台）太阳能有限公司 | Dust collection rake head and dust collection rake for cleaning heating bottom plate of laminating machine |
-
2021
- 2021-07-02 CN CN202110750485.6A patent/CN113385448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801251A (en) * | 2007-07-09 | 2010-08-11 | S.C.约翰逊父子公司 | Handheld portable devices for touchless particulate matter removal |
| US20100005618A1 (en) * | 2008-07-11 | 2010-01-14 | Fujitsu Limited | Dust tray |
| CN202438498U (en) * | 2012-03-01 | 2012-09-19 | 深圳先进储能材料国家工程研究中心有限公司 | Automatic cleaning dust-removal system of photovoltaic assembly |
| CN204005689U (en) * | 2014-07-18 | 2014-12-10 | 张峻齐 | Static is except haze street lamp |
| US20190039103A1 (en) * | 2017-08-01 | 2019-02-07 | Robert M. Morris, SR. | Popcorn Ceiling Eliminator |
| CN212349551U (en) * | 2020-04-13 | 2021-01-15 | 晶澳（邢台）太阳能有限公司 | Dust collection rake head and dust collection rake for cleaning heating bottom plate of laminating machine |
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Application publication date: 20210914 |
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