CN208960436U - A kind of solar energy photovoltaic panel cleaning device - Google Patents
A kind of solar energy photovoltaic panel cleaning device Download PDFInfo
- Publication number
- CN208960436U CN208960436U CN201821135732.1U CN201821135732U CN208960436U CN 208960436 U CN208960436 U CN 208960436U CN 201821135732 U CN201821135732 U CN 201821135732U CN 208960436 U CN208960436 U CN 208960436U
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- China
- Prior art keywords
- solar energy
- fixedly connected
- photovoltaic panel
- tube
- lead screw
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- 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.)
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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
Abstract
The utility model provides a kind of solar energy photovoltaic panel cleaning device, is related to photovoltaic apparatus technical field.The solar energy photovoltaic panel cleaning device, including pedestal, solar panels, the back side of the solar panels is fixedly connected with the front of pedestal, reciprocal lead screw is provided at the top of the solar panels, the left end of the reciprocal lead screw is fixedly connected by output shaft with the output end of motor, the right end of the reciprocal lead screw is flexibly connected by bearing with fixed plate, the side of the reciprocal lead screw is socketed with compatible reciprocal nut, the bottom of the reciprocal nut and front for being located at solar panels is fixedly connected with cleaning bar.The solar energy photovoltaic panel cleaning device, by being provided with reciprocal lead screw, cleaning bar, telescoping tube and control valve, making the substance of some difficult cleanings on solar panels can also be cleaned out, and solar energy cleaning agent will not damage solar panels, it solves the problems, such as that cleaning is sordid, also saves time and the strength of staff.
Description
Technical field
The utility model relates to photovoltaic apparatus technical field, specially a kind of solar energy photovoltaic panel cleaning device.
Background technique
Photovoltaic: being the abbreviation of solar photovoltaic generation system, is a kind of photovoltaic effect using solar cell semiconductor material
It answers, solar radiation energy is converted directly into a kind of new power generating system of electric energy, have independent operating and the two kinds of sides that are incorporated into the power networks
Formula, photovoltaic are defined as the direct conversion of ray energy, are often referred to conversion of the solar energy to electric energy, the i.e. sun in practical applications
Energy photovoltaic, its implementation are mainly passed through using solar energy electroplax made by the semiconductor materials such as silicon, are produced using illumination
Raw direct current, such as the solar battery being seen everywhere in our daily lifes, these solar energy electroplax are usually all placed in
Outside, so often having dust, soil, birds droppings and water etc. above, it is necessary to which staff carries out it periodically
Cleaning, manual cleaning need to waste a large amount of time and labour, very inconvenient.
China Patent Publication No. is a kind of solar street light dust-extraction unit disclosed in CN203703911U, which can be certainly
It is dynamic that dust on solar panels is cleaned, but only solar panels are cleaned by hairbrush, cleaning effect is simultaneously bad,
Some soil, birds droppings and water etc. can be left down, it is also necessary to which staff carries out secondary cleaning to solar panels, very
It is inconvenient.
Utility model content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the utility model provides a kind of solar energy photovoltaic panel cleaning device, solves clear
Sweep sordid problem.
(2) technical solution
In order to achieve the above object, the utility model is achieved by the following technical programs: a kind of solar energy photovoltaic panel is clear
Cleaning device, including pedestal, solar panels, the back side of the solar panels are fixedly connected with the front of pedestal, the solar panels
Top be provided with reciprocal lead screw, the left end of the reciprocal lead screw is fixedly connected by output shaft with the output end of motor, described
The right end of reciprocal lead screw is flexibly connected by bearing with fixed plate, and the side of the reciprocal lead screw is socketed with compatible reciprocal spiral shell
Mother, the bottom of the reciprocal nut and the front for being located at solar panels are fixedly connected with cleaning bar, and the bottom of the cleaning bar is set
Gag lever post is set, the inside of the gag lever post is flexibly connected by limiting slot with the side surface of sliding block, grafting at the top of the cleaning bar
There is the first quadrature tube, telescoping tube, the one end of the telescoping tube far from the first quadrature tube are socketed at the top of first quadrature tube
It is socketed with the side of the second quadrature tube, the upper and lower ends of the telescoping tube are provided with the second gripping mechanism, second right angle
The left end of pipe is fixedly connected with water pump, and the water inlet end of the water pump on the right side of water inlet pipe and water tank by being fixedly connected.
Preferably, the upper and lower ends of the cleaning bar pass through the first gripping mechanism respectively with the bottom of reciprocal nut and cunning
It is fixedly connected at the top of block, first gripping mechanism includes concave block, the inner surface of the concave block and one end of cleaning bar
Overlap joint, the front of the concave block are plugged with the first screw rod, and one end of first screw rod sequentially passes through concave block from front to back
Front and cleaning bar front and extend to the back side of concave block, the back side of first screw rod is connected with compatible
Nut.
Preferably, the inside of the cleaning bar opens up fluted, and the back side of the cleaning bar offers several watering slots,
For several described watering slots with groove intercommunication, the bottom of the cleaning bar is fixedly connected with hairbrush, the back side of the hairbrush with
The front overlap joint of solar panels.
Preferably, second gripping mechanism includes arc fixture block, and the inner wall of the arc fixture block is fixedly connected with rubber
Layer, the front of the arc fixture block are plugged with inserted link, pass through the second screw rod between the side and arc fixture block bottom of the inserted link
It is fixedly connected.
Preferably, second gripping mechanism is separately fixed at the one end and second on the first quadrature tube top and telescoping tube directly
The part of the other end socket of the bottom end and telescoping tube of cornue.
Preferably, the side of first quadrature tube is fixedly connected with control valve.
Preferably, the water tank, water pump and the second quadrature tube are respectively positioned on the top of reciprocal lead screw.
Preferably, the gag lever post is located at the underface of solar panels.
(3) beneficial effect
The utility model provides a kind of solar energy photovoltaic panel cleaning device.Have it is following the utility model has the advantages that
1, the solar energy photovoltaic panel cleaning device, by being provided with reciprocal lead screw, cleaning bar, telescoping tube and control valve,
Reciprocal lead screw drives cleaning bar to move back and forth on the surface of solar panels by reciprocal nut, and solar energy is added in water tank
Board cleaning agent, starting water pump and opening control valve, cleaning agent is transported to by the second quadrature tube, telescoping tube and the first quadrature tube
The interior grooves of cleaning bar, then be spread across on solar panels by watering slot, then hairbrush is cooperated to clean solar panels, made too
The substances of some difficult cleanings can also be cleaned out on positive energy plate, and solar energy cleaning agent will not cause to hurt to solar panels
Evil solves the problems, such as that cleaning is sordid, also saves time and the strength of staff.
2, solar energy photovoltaic panel cleaning device, by being provided with the first gripping mechanism and the second gripping mechanism, concave block
Inner surface and one end of cleaning bar overlap, then be fixed by the first screw rod, two arc fixture blocks respectively by telescoping tube and
The part clamping of first quadrature tube and telescoping tube and the socket of the second quadrature tube, is fixed, structure is simple, makes by the second screw rod
Cleaning bar and telescoping tube easily facilitate disassembly and replacement, to guarantee the efficiency of cleaning.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the cross-sectional view that the utility model cleans rod structure；
Fig. 3 is the rearview that the utility model cleans rod structure；
Fig. 4 is the schematic diagram of the second gripping mechanism of the utility model structure；
Fig. 5 is the schematic diagram of the utility model flexible pipe structure.
In figure: 1 pedestal, 2 solar panels, 3 reciprocal lead screws, 4 motors, 5 fixed plates, 6 reciprocal nuts, 7 cleaning bars, 8 limits
Bar, 9 sliding blocks, 10 first gripping mechanisms, 101 concave blocks, 102 first screw rods, 103 nuts, 11 watering slots, 12 hairbrush, 13 first
Quadrature tube, 14 control valves, 15 telescoping tubes, 16 second quadrature tubes, 17 second gripping mechanisms, 171 arc fixture blocks, 172 rubber layers,
173 inserted links, 174 second screw rods, 18 water pumps, 19 water tanks.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-5 is please referred to, the utility model provides a kind of technical solution: a kind of solar energy photovoltaic panel cleaning device, including
The back side of pedestal 1, solar panels 2, solar panels 2 is fixedly connected with the front of pedestal 1, and the top of solar panels 2 is provided with past
Multifilament thick stick 3, reciprocal lead screw 3 are able to drive cleaning bar 7 and move back and forth, and making to clean becomes more conveniently and quickly, toward multifilament
The left end of thick stick 3 is fixedly connected by output shaft with the output end of motor 4, and the right end of reciprocal lead screw 3 is living by bearing and fixed plate 5
Dynamic connection, the side of reciprocal lead screw 3 are socketed with compatible reciprocal nut 6, the bottom of reciprocal nut 6 and are located at solar panels 2
Front be fixedly connected with cleaning bar 7, solar panels 2 are cleaned, the upper and lower ends of cleaning bar 7 pass through the first clamping dress
It sets 10 to be fixedly connected with the top of the bottom of reciprocal nut 6 and sliding block 9 respectively, the first gripping mechanism 10 makes the installation of cleaning bar 7
Become more convenient and simple with disassembly, the first gripping mechanism 10 includes concave block 101, the inner surface of concave block 101 and cleaning
One end of bar 7 overlaps, and the front of concave block 101 is plugged with the first screw rod 102, and one end of the first screw rod 102 is from front to back successively
Through the front of concave block 101 and the front of cleaning bar 7 and the back side for extending to concave block 101, the back side of the first screw rod 102 is living
Dynamic to be connected with compatible nut 103, the inside of cleaning bar 7 opens up fluted, and the back side of cleaning bar 7 offers several waterings
Slot 11, several watering slots 11 enable solar energy cleaning agent directly from cleaning bar 7 with groove intercommunication, groove and watering slot 11
Inside spill to solar panels 2, make cleaned more clean of solar panels, the bottom of cleaning bar 7 is fixedly connected with hairbrush 12,
Hairbrush 12 is used to clean solar panels, and the back side of hairbrush 12 and the front of solar panels 2 overlap, the bottom of cleaning bar 7
Gag lever post 8 is set, and the inside of gag lever post 8 is flexibly connected by limiting slot with the side surface of sliding block 9, and gag lever post 8 is played to cleaning
The support of bar 7 and the effect for limiting moving range are plugged with the first quadrature tube 13, the side of the first quadrature tube 13 at the top of cleaning bar 7
Face is fixedly connected with control valve 14, and control valve 14 can control the flow velocity and switch of solar energy cleaning agent, the first quadrature tube 13
Top is socketed with telescoping tube 15, and the effect of telescoping tube 15 is to guarantee, cleaning bar 7 can follow this movement when moving back and forth
And be unlikely to be broken, it ensure that solar energy cleaning agent can be continuously supplied in the interior grooves of cleaning bar 7, telescoping tube 15 is separate
One end of first quadrature tube 13 and the side of the second quadrature tube 16 are socketed, and the upper and lower ends of telescoping tube 15 are provided with the second clamping
Device 17, the second gripping mechanism 17 ensure that telescoping tube 15 and the socket part of the first quadrature tube 13 and the second quadrature tube 16 are connect
Even closer, the second gripping mechanism 17 includes arc fixture block 171, and the inner wall of arc fixture block 171 is fixedly connected with rubber layer 172,
Rubber layer 172 makes arc fixture block 171 not destroy telescoping tube 15 in clamping telescoping tube 15, while also functioning to the effect of sealing,
The front of arc fixture block 171 is plugged with inserted link 173, passes through the second screw rod between 171 bottom of side and arc fixture block of inserted link 173
174 are fixedly connected, and the simple structure of the second gripping mechanism 17 makes the disassembly of telescoping tube 15 become more convenient and simple, and two
Second gripping mechanism 17 is separately fixed at the one end on 13 top of the first quadrature tube and telescoping tube 15 and the bottom end of the second quadrature tube 16
The part being socketed with the other end of telescoping tube 15, the left end of the second quadrature tube 16 is fixedly connected with water pump 18, the water inlet of water pump 18
End is fixedly connected by water inlet pipe with the right side of water tank 19, and solar energy cleaning agent, water tank 19, water pump 18 are used to store in water tank 19
The top of reciprocal lead screw 3 is respectively positioned on the second quadrature tube 16, the solar energy photovoltaic panel cleaning device, by being provided with reciprocal lead screw
3, cleaning bar 7, telescoping tube 15 and control valve 14, reciprocal lead screw 3 drive cleaning bar 7 in the table of solar panels 2 by reciprocal nut 6
Face moves back and forth, and solar panels cleaning agent, starting water pump 18 and opening control valve 14 is added in water tank 19, by cleaning agent
It is transported to the interior grooves of cleaning bar 7 by the second quadrature tube 16, telescoping tube 15 and the first quadrature tube 13, then is spilt by watering slot 11
Onto solar panels 2, then hairbrush 12 is cooperated to clean solar panels 2, makes the substance of some difficult cleanings on solar panels 2
It can also be cleaned out, and solar energy cleaning agent will not damage solar panels, solve the problems, such as that cleaning is sordid,
Time and the strength of staff are also saved, the solar energy photovoltaic panel cleaning device, by being provided with the first gripping mechanism 10
With the second gripping mechanism 17, the inner surface of concave block 101 and one end of cleaning bar 7 are overlapped, then are consolidated by the first screw rod 102
It is fixed, what telescoping tube 15 and the first quadrature tube 13 and telescoping tube 15 and the second quadrature tube 16 were socketed by two arc fixture blocks 171 respectively
Part clamping is fixed by the second screw rod 174, and structure is simple, make cleaning bar 7 and telescoping tube 15 easily facilitate disassembly and more
It changes, to guarantee the efficiency of cleaning.
Working principle: in use, by solar energy cleaning agent is added in water tank 19, start motor 4 and water pump 18, open control
Valve 14, reciprocal lead screw 3 drive cleaning bar 7 to move back and forth by reciprocal nut 6, and water pump 18 is clear by solar energy by water inlet pipe
Lotion delivery cleans solar energy to the second quadrature tube 16, then by the second quadrature tube 16, telescoping tube 15 and the first quadrature tube 13
Agent is transported to the inside of cleaning bar 7, and solar energy cleaning agent is sprayed on solar panels 2 by watering slot 11, cooperates hairbrush 12
In reciprocatory movement, solar panels 2 are cleaned.
As stated above:
1, solar energy photovoltaic panel cleaning device, by being provided with reciprocal lead screw 3, cleaning bar 7, telescoping tube 15 and control valve
14, reciprocal lead screw 3 drives cleaning bar 7 to move back and forth on the surface of solar panels 2 by reciprocal nut 6, in water tank 19
Solar panels cleaning agent, starting water pump 18 and opening control valve 14 is added, cleaning agent is passed through into the second quadrature tube 16, telescoping tube 15
It is transported to the interior grooves of cleaning bar 7 with the first quadrature tube 13, then is spread across on solar panels 2 by watering slot 11, then cooperates hair
It brushes 12 pairs of solar panels 2 to clean, be cleaned out the substance of some difficult cleanings on solar panels 2 can also, and the sun
Energy cleaning agent will not damage solar panels, solve the problems, such as that cleaning is sordid, also save the time of staff
And strength.
2, the solar energy photovoltaic panel cleaning device, it is recessed by being provided with the first gripping mechanism 10 and the second gripping mechanism 17
The inner surface of shape block 101 and one end of cleaning bar 7 overlap, then are fixed by the first screw rod 102, two arc fixture blocks 171
The part clamping for being respectively socketed telescoping tube 15 and the first quadrature tube 13 and telescoping tube 15 and the second quadrature tube 16, passes through the second spiral shell
Bar 174 is fixed, and structure is simple, and cleaning bar 7 and telescoping tube 15 is made to easily facilitate disassembly and replacement, to guarantee the effect of cleaning
Rate.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of solar energy photovoltaic panel cleaning device, including pedestal (1), solar panels (2), it is characterised in that: the solar energy
The back side of plate (2) is fixedly connected with the front of pedestal (1), is provided with reciprocal lead screw (3), institute at the top of the solar panels (2)
The left end for stating reciprocal lead screw (3) is fixedly connected by output shaft with the output end of motor (4), the right end of the reciprocal lead screw (3)
It is flexibly connected by bearing with fixed plate (5), the side of the reciprocal lead screw (3) is socketed with compatible reciprocal nut (6), institute
It states the bottom of reciprocal nut (6) and is fixedly connected with cleaning bar (7) positioned at the front of solar panels (2), the cleaning bar (7)
Gag lever post (8) are arranged in bottom, and the inside of the gag lever post (8) is flexibly connected by limiting slot with the side surface of sliding block (9), described
It is plugged with the first quadrature tube (13) at the top of cleaning bar (7), is socketed with telescoping tube (15), institute at the top of first quadrature tube (13)
The side for stating telescoping tube (15) one end and the second quadrature tube (16) far from the first quadrature tube (13) is socketed, the telescoping tube (15)
Upper and lower ends be provided with the second gripping mechanism (17), the left end of second quadrature tube (16) is fixedly connected with water pump
(18), the water inlet end of the water pump (18) on the right side of water inlet pipe and water tank (19) by being fixedly connected.
2. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: the cleaning bar (7)
Upper and lower ends pass through the first gripping mechanism (10) and are fixedly connected respectively at the top of the bottom of reciprocal nut (6) and sliding block (9),
First gripping mechanism (10) includes concave block (101), the inner surface of the concave block (101) and the one end of cleaning bar (7)
Overlap joint, the front of the concave block (101) are plugged with the first screw rod (102), and one end of first screw rod (102) is from front to back
The front of concave block (101) is sequentially passed through with the front of cleaning bar (7) and extends to the back side of concave block (101), described first
The back side of screw rod (102) is connected with compatible nut (103).
3. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: the cleaning bar (7)
Inside open up it is fluted, the back side of the cleaning bar (7) offer several watering slot (11), several described watering slots (11)
With groove intercommunication, the bottom of the cleaning bar (7) is fixedly connected with hairbrush (12), the back side of the hairbrush (12) and solar energy
The front overlap joint of plate (2).
4. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: second gripping mechanism
It (17) include arc fixture block (171), the inner wall of the arc fixture block (171) is fixedly connected with rubber layer (172), the arc card
The front of block (171) is plugged with inserted link (173), by the between the side and arc fixture block (171) bottom of the inserted link (173)
Two screw rods (174) are fixedly connected.
5. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: two second clampings
Device (17) is separately fixed at the one end on the first quadrature tube (13) top and telescoping tube (15) and the bottom end of the second quadrature tube (16)
The part being socketed with the other end of telescoping tube (15).
6. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: first quadrature tube
(13) side is fixedly connected with control valve (14).
7. a kind of solar energy photovoltaic panel cleaning device according to claim 1, it is characterised in that: the water tank (19), water
Pump (18) and the second quadrature tube (16) are respectively positioned on the top of reciprocal lead screw (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135732.1U CN208960436U (en) | 2018-07-18 | 2018-07-18 | A kind of solar energy photovoltaic panel cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135732.1U CN208960436U (en) | 2018-07-18 | 2018-07-18 | A kind of solar energy photovoltaic panel cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208960436U true CN208960436U (en) | 2019-06-11 |
Family
ID=66748644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821135732.1U Expired - Fee Related CN208960436U (en) | 2018-07-18 | 2018-07-18 | A kind of solar energy photovoltaic panel cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208960436U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479656A (en) * | 2019-08-30 | 2019-11-22 | 盐城创咏新能源投资有限公司 | A kind of photovoltaic power generation equipment maintenance ancillary equipment |
| CN110897588A (en) * | 2019-11-30 | 2020-03-24 | 温州大学瓯江学院 | Household sole cleaning device |
-
2018
- 2018-07-18 CN CN201821135732.1U patent/CN208960436U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479656A (en) * | 2019-08-30 | 2019-11-22 | 盐城创咏新能源投资有限公司 | A kind of photovoltaic power generation equipment maintenance ancillary equipment |
| CN110897588A (en) * | 2019-11-30 | 2020-03-24 | 温州大学瓯江学院 | Household sole cleaning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 314000 Room 301, 3rd floor, No. 383 Huimin Avenue, Huimin Street, Jiashan County, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Xinbibao Energy Technology Co., Ltd. Address before: Room 402, No. 168, Kapa Road, Dayun Town, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Xinbibao Energy Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191217 Address after: Shop 1011, Shenglong residential quarter, intersection of Zhenxing street and Yong'an Road, Xiaoyi City, Luliang City, Shanxi Province Patentee after: Luliang dingyang power decoration Service Co., Ltd Address before: 314000 Room 301, 3rd floor, No. 383 Huimin Avenue, Huimin Street, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Xinbibao Energy Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190611 Termination date: 20200718 |