CN111306819B - Dust cleaning device for heat collecting pipe of solar water heater - Google Patents
Dust cleaning device for heat collecting pipe of solar water heater Download PDFInfo
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- CN111306819B CN111306819B CN202010275210.7A CN202010275210A CN111306819B CN 111306819 B CN111306819 B CN 111306819B CN 202010275210 A CN202010275210 A CN 202010275210A CN 111306819 B CN111306819 B CN 111306819B
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- fixedly connected
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/20—Cleaning; Removing snow
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Life Sciences & Earth Sciences (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a dust removing device for a heat collecting pipe of a solar water heater, which comprises a shell, wherein the shell is of a hollow structure, a first limiting ring is fixedly connected to the inner wall of one side of the shell, a driving shaft is rotatably connected to the first limiting ring, and one end, far away from the first limiting ring, of the driving shaft penetrates through the shell. According to the invention, wind power resources are collected and converted into power of the driving shaft, the centrifugal force applied to the sliding block is utilized, and the transmission ratio between the driving shaft and the driven shaft is changed according to the strength of external wind, so that the driven shaft can still stably and slowly rotate within a certain range, the situation that the rotating speed of the driven shaft is too high when external wind is too high can be effectively avoided, the problem of abrasion and abrasion caused by the fact that the cleaning ring slides back and forth along the glass tube outside the heat collecting tube to clean the heat collecting tube is solved, the service life of the cleaning ring is effectively prolonged, and the dust cleaning effect of the cleaning ring on the heat collecting tube is ensured.
Description
Technical Field
The invention relates to the technical field of dust removal of heat collecting pipes of solar water heaters, in particular to a dust removal device for the heat collecting pipes of the solar water heaters.
Background
The solar water heater is a heating device for converting solar energy into heat energy, and heats water from low temperature to high temperature so as to meet the requirement of hot water in life and production of people. The solar water heater is divided into a vacuum tube type solar water heater and a flat plate type solar water heater according to the structural form, and mainly uses the vacuum tube type solar water heater as a main part. The vacuum tube type domestic solar water heater is composed of heat collecting tube, water storage tank and support, and can convert solar energy into heat energy, and mainly depends on the vacuum heat collecting tube, and the vacuum heat collecting tube can utilize the principle of that hot water floats upwards and cold water sinks to make water produce microcirculation to obtain the required hot water. Due to the natural sedimentation of dust in the air and other effects, after the solar water heater is used for a period of time, a layer of thick dust can be accumulated on the vacuum heat collecting tube, and the dust can seriously affect the heat collecting efficiency of the heat collecting tube by shielding sunlight, so that the normal use of the solar water heater is affected.
In order to ensure that the heat collecting pipes of the solar water heater are not interfered by dust, the heat collecting pipes need to be cleaned by dust frequently, but the solar water heater is generally installed on the roof, so that manual dust cleaning is inconvenient to be performed frequently, therefore, an automatic dust cleaning device using wind power as driving force is also provided in the prior art, although the cleaning brush can be driven by the wind power to realize automatic dust cleaning, when the wind power is too large, the dust cleaning device has too high running speed, and the cleaning brush and the heat collecting pipes are frequently rubbed, so that the brush hair on the cleaning brush is fast worn, the heat collecting pipes are easy to be worn, and the service life of the cleaning brush is fast shortened.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: in order to ensure that the heat collecting pipes of the solar water heater are not interfered by dust, the heat collecting pipes need to be cleaned by dust frequently, but the solar water heater is generally installed on the roof, so that manual dust cleaning is inconvenient to be performed frequently, therefore, an automatic dust cleaning device using wind power as driving force is also provided in the prior art, although the cleaning brush can be driven by the wind power to realize automatic dust cleaning, when the wind power is too large, the dust cleaning device has too high running speed, and the cleaning brush and the heat collecting pipes are frequently rubbed, so that the brush hair on the cleaning brush is fast worn, the heat collecting pipes are easy to be worn, and the service life of the cleaning brush is fast shortened.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dust cleaning device for a heat collecting pipe of a solar water heater comprises a shell, wherein the shell is of a hollow structure, a first limit ring is fixedly connected on the inner wall of one side of the shell, a driving shaft is rotationally connected in the first limit ring, one end of the driving shaft, which is far away from the first limit ring, penetrates through the shell, one end of the driving shaft, which penetrates through the shell, is provided with a wind power driving device, the outer side wall of the driving shaft is fixedly connected with a driving fixed pulley, the outer side wall of the driving shaft is connected with a driving movable pulley in a sliding way, the driving fixed pulley and the driving movable pulley are both positioned in the shell, two second limiting rings are symmetrically and fixedly connected on the inner side wall of the shell, a driven shaft is rotatably connected between the two second limiting rings, the outer side wall of the driven shaft is symmetrically and fixedly connected with two limiting rods, and the outer side wall of the driven shaft is symmetrically and slidably connected with two driven pulleys;
a spring is fixedly connected between the two driven pulleys, the spring is sleeved on the outer side wall of the driven shaft, the driving fixed pulley, the driving movable pulley and the driven pulleys are in transmission connection through a transmission steel belt, an installation block is fixedly connected to the outer side wall of one end, close to the first limiting ring, of the driving shaft, two piston cavities are symmetrically arranged in one end, close to the driving movable pulley, of the installation block, two piston rods are symmetrically and fixedly connected to one side wall, close to the installation block, of the driving movable pulley, one ends of the two piston rods are connected to the piston cavities in a sliding mode, two sliding grooves communicated with the piston cavities are symmetrically arranged on the outer side wall of the installation block, sliding blocks are connected to the two sliding grooves in a sliding mode, and a driving helical gear is fixedly connected to the driven shaft;
the improved cleaning device is characterized in that a mounting ring is arranged on the shell, a transmission shaft is rotatably connected in the mounting ring, one end of the transmission shaft close to the driving bevel gear is fixedly connected with a driven bevel gear, the driven bevel gear is meshed with the driving bevel gear, one end of the transmission shaft far away from the driven bevel gear is fixedly connected with a reciprocating lead screw, a mounting base is arranged on the reciprocating lead screw, a mounting plate is fixedly connected on one side wall of the mounting base, and a plurality of cleaning rings are symmetrically and fixedly connected on one side wall of the mounting base and far away from the mounting plate.
Preferably, the wind power driving device comprises three fixing rods which are symmetrically arranged, the three fixing rods are fixedly connected to one end, penetrating through the shell, of the driving shaft, the three fixing rods are fixedly connected to wind cups at one ends, far away from the driving shaft, of the fixing rods, and the three wind cups are rotationally symmetrically arranged.
Preferably, the mounting ring, the transmission shaft and the reciprocating screw rod are arranged at an inclined angle.
Preferably, a plurality of bamboo fiber bristles are arranged on the inner side wall of the cleaning ring.
The invention has the beneficial effects that: the wind cup is used for collecting wind power resources, the wind cup is converted into power to drive the driving shaft to rotate, the transmission ratio between the driving shaft and the driven shaft can be changed by utilizing the centrifugal force action on the sliding block when the sliding block rotates along with the driving shaft, because the transmission ratio between the driving shaft and the driven shaft can be changed according to the strength of the external wind, the effect that when the driving shaft rotates rapidly, even if the wind power is strengthened and the rotating speed of the driving shaft is accelerated, the driven shaft can still maintain a certain range to stably and slowly rotate, thereby effectively avoiding the situation that the rotating speed of the driven shaft is too high when the external wind power is too high, thereby solving the problem of abrasion and grinding caused by the high frequency of cleaning the cleaning ring by sliding back and forth along the glass tube outside the heat collecting tube, thereby effectively prolonging the service life of the cleaning ring and ensuring the dust cleaning effect of the cleaning ring on the heat collecting pipe.
Drawings
FIG. 1 is a schematic view of an internal structure of a dust removing device for a heat collecting tube of a solar water heater according to the present invention;
FIG. 2 is a sectional view of the internal structure of a dust removing device for heat collecting pipes of a solar water heater according to the present invention;
FIG. 3 is an enlarged view of the structure A of FIG. 2;
fig. 4 is a schematic structural view of a mounting plate of the dust removing device for the heat collecting tube of the solar water heater provided by the invention.
In the figure: the device comprises a shell 1, a first limiting ring 2, a driving shaft 3, a fixing rod 4, an air cup 5, a driving fixing pulley 6, a driving moving pulley 7, a second limiting ring 8, a driven shaft 9, a limiting rod 10, a driven pulley 11, a spring 12, a transmission steel belt 13, a mounting block 14, a piston cavity 15, a piston rod 16, a sliding chute 17, a sliding block 18, a driving bevel gear 19, a mounting ring 20, a transmission shaft 21, a driven bevel gear 22, a reciprocating lead screw 23, a mounting base 24, a mounting plate 25 and a cleaning ring 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a dust removing device for a heat collecting tube of a solar water heater, which comprises a shell 1, wherein the shell 1 is of a hollow structure, a first limit ring 2 is fixedly connected to the inner wall of one side of the shell 1, a driving shaft 3 is rotatably connected to the first limit ring 2, one end of the driving shaft 3, which is far away from the first limit ring 2, penetrates through the shell 1, one end of the driving shaft 3, which penetrates through the shell 1, is provided with a wind power driving device, the wind power driving device comprises three fixing rods 4 which are symmetrically arranged, the three fixing rods 4 are fixedly connected to one end of the driving shaft 3, which penetrates through the shell 1, the three fixing rods 4 are fixedly connected to one end of the driving shaft 3, which is far away from the driving shaft 3, and are fixedly connected with wind cups 5, and the three wind cups 5 are rotationally symmetrical.
When wind in the surrounding environment, wind cup 5 can bear the difference of wind-force with the help of self two sides and drive shaft 3 rotatory, thereby regard wind-force as drive power, fixedly connected with initiative fixed pulley 6 on the lateral wall of drive shaft 3, sliding connection has initiative removal pulley 7 on the lateral wall of drive shaft 3, initiative fixed pulley 6 all is located casing 1 with initiative removal pulley 7, two second spacing rings 8 of symmetry fixedly connected with on casing 1's the inside wall, it is connected with driven shaft 9 to rotate between two second spacing rings 8, two gag lever posts 10 of symmetry fixedly connected with on the lateral wall of driven shaft 9.
Two driven pulleys 11 are symmetrically and slidably connected to the outer side wall of the driven shaft 9, a spring 12 is fixedly connected between the two driven pulleys 11, the spring 12 is represented by pulling force of the two driven pulleys 11, the spring 12 is sleeved on the outer side wall of the driven shaft 9, the driving fixed pulley 6, the driving movable pulley 7 and the driven pulley 11 are in transmission connection through a transmission steel belt 13, and the driving shaft 3 can drive the driven shaft 9 to rotate along with the driving fixed pulley 6, the driving movable pulley 7, the driven pulley 11 and the transmission steel belt 13.
Fixedly connected with installation piece 14 on the lateral wall that drive shaft 3 is close to 2 one end of first spacing ring, the symmetry is equipped with two piston chamber 15 in the one end that installation piece 14 is close to initiative movable pulley 7, two piston rods 16 of symmetry fixedly connected with on the lateral wall that initiative movable pulley 7 is close to installation piece 14, the equal sliding connection of one end of two piston rods 16 is in piston chamber 15, the symmetry is equipped with two spout 17 with 15 intercommunications in piston chamber on the lateral wall of installation piece 14, equal sliding connection has slider 18 in two spout 17.
The driving shaft 3 can drive the mounting block 14 to rotate together when rotating, and then drive the sliding block 18 to do circular motion, under the action of centrifugal force, the sliding block 18 extends out of the sliding groove 17, the rotating speed of the driving shaft 3 is faster, the part of the sliding block 18 extending out of the sliding groove 17 is more, because the sliding groove 17 is communicated with the piston cavity 15, the sliding groove 17 is extended out along with the sliding block 18, under the action of negative pressure, the piston rod 16 slides downwards along the piston cavity 15, the driving movable pulley 7 is pulled to move downwards, so that the distance between the driving fixed pulley 6 and the driving movable pulley 7 is enlarged, the radius of the contact part between the transmission steel belt 13 and the driving fixed pulley 6 and the driving movable pulley 7 is reduced, and the transmission steel belt 13 is integrally deviated to the direction of the driven pulley 11.
Under the action of the elastic force of the spring 12, the two driven pulleys 11 are close to each other, the radius of the contact part between the transmission steel belt 13 and the driven pulley 11 is increased, so that the transmission ratio between the driving shaft 3 and the driven shaft 9 is changed, the transmission ratio is adjusted according to the rotating speed of the driving shaft 3, the higher the rotating speed of the driving shaft 3 is, the higher the transmission ratio between the driving shaft 3 and the driven shaft 9 is, and conversely, the lower the rotating speed of the driving shaft 3 is, the lower the transmission ratio between the driving shaft 3 and the driven shaft 9 is, so that the rotating speed of the driving shaft 3 is increased when the driving shaft 3 rotates rapidly, and the driven shaft 9 can still maintain to rotate slowly and stably within a certain range even if the wind power is increased subsequently, and the situation that the rotating speed of the driven shaft 9 is too high when the external wind power is too high can be avoided.
Fixedly connected with drive helical gear 19 on the driven shaft 9, be equipped with collar 20 on the casing 1, the 20 internal rotations of collar are connected with transmission shaft 21, transmission shaft 21 is close to one of drive helical gear 19 and serves driven helical gear 22 of fixedly connected with, driven helical gear 22 is connected with the meshing of drive helical gear 19, transmission shaft 21 keeps away from one of driven helical gear 22 and serves reciprocal lead screw 23 of fixedly connected with, collar 20, transmission shaft 21 and reciprocal lead screw 23 all are inclination setting, change the rotation of driven shaft 9 into the rotation of the transmission shaft 21 of incline direction, then utilize transmission shaft 21 to drive reciprocal lead screw 23 and rotate.
Be equipped with mounting base 24 on the reciprocal lead screw 23, fixedly connected with mounting panel 25 on a lateral wall of mounting base 24, a plurality of clean rings 26 of symmetry fixedly connected with on a lateral wall of mounting panel 25 far away from mounting base 24, clean ring 26 cover is established on solar water heater's thermal-collecting tube, the detail can be seen figure 1, utilize the thermal-collecting tube to carry on spacingly to clean ring 26 and mounting panel 25 and mounting base 24, make the rotation of reciprocal lead screw 23 can order about mounting base 24 to be reciprocal linear motion on reciprocal lead screw 23, and then drive clean ring 26 and clear up the dust on the outside glass pipe of thermal-collecting tube, prevent to save the dust on the thermal-collecting tube and shelter from sunshine and influence the collecting efficiency of thermal-collecting tube, and then influence solar water heater's normal work.
Because the drive ratio between drive shaft 3 and the driven shaft 9 can change according to external wind-force power, make driven shaft 9 can maintain and carry out stable slow rotation in the certain limit, consequently can effectually avoid clean ring 26 to make a round trip to slide along the outside glass pipe of thermal-collecting tube and carry out the too high wearing and tearing mill flower problem that arouses of clear frequency to it, and then the life of effectual extension clean ring 26, and guarantee clean ring 26 is equipped with a plurality of bamboo fibre brush hairs to the deashing effect of thermal-collecting tube, be equipped with a plurality of bamboo fibre brush hairs on clean ring 26's the inside wall.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The dust removing device for the heat collecting tube of the solar water heater comprises a shell (1) and is characterized in that the shell (1) is of a hollow structure, a first limiting ring (2) is fixedly connected to the inner wall of one side of the shell (1), a driving shaft (3) is rotatably connected to the first limiting ring (2), one end, away from the first limiting ring (2), of the driving shaft (3) penetrates through the shell (1), a wind power driving device is arranged at one end, penetrating through the shell (1), of the driving shaft (3), a driving fixed pulley (6) is fixedly connected to the outer side wall of the driving shaft (3), a driving movable pulley (7) is slidably connected to the outer side wall of the driving shaft (3), the driving fixed pulley (6) and the driving movable pulley (7) are both located in the shell (1), and two second limiting rings (8) are symmetrically and fixedly connected to the inner side wall of the shell (1), a driven shaft (9) is rotatably connected between the two second limiting rings (8), two limiting rods (10) are symmetrically and fixedly connected to the outer side wall of the driven shaft (9), and two driven pulleys (11) are symmetrically and slidably connected to the outer side wall of the driven shaft (9);
the spring (12) is fixedly connected between the two driven pulleys (11), the spring (12) is sleeved on the outer side wall of the driven shaft (9), the driving fixed pulley (6), the driving movable pulley (7) and the driven pulley (11) are in transmission connection through a transmission steel belt (13), the outer side wall of one end, close to the first limiting ring (2), of the driving shaft (3) is fixedly connected with an installation block (14), two piston cavities (15) are symmetrically arranged in one end, close to the driving movable pulley (7), of the installation block (14), two piston rods (16) are symmetrically and fixedly connected to one side wall, close to the installation block (14), of the driving movable pulley (7), one ends of the two piston rods (16) are all in sliding connection in the piston cavities (15), two sliding grooves (17) communicated with the piston cavities (15) are symmetrically arranged on the outer side wall of the installation block (14), sliding blocks (18) are connected in the two sliding grooves (17) in a sliding mode, and a driving bevel gear (19) is fixedly connected to the driven shaft (9);
be equipped with collar (20) on casing (1), collar (20) internal rotation is connected with transmission shaft (21), one of transmission shaft (21) is close to drive helical gear (19) serves driven helical gear (22) of fixedly connected with, driven helical gear (22) are connected with drive helical gear (19) meshing, one of transmission shaft (21) keep away from driven helical gear (22) serves reciprocal lead screw (23) of fixedly connected with, be equipped with mounting base (24) on reciprocal lead screw (23), fixedly connected with mounting panel (25) on a lateral wall of mounting base (24), a plurality of clean rings (26) of symmetry fixedly connected with on a lateral wall of mounting base (24) are kept away from in mounting panel (25).
2. The dust removing device for the heat collecting tube of the solar water heater according to claim 1, wherein the wind power driving device comprises three symmetrically arranged fixing rods (4), the three fixing rods (4) are all fixedly connected to one end of the driving shaft (3) penetrating through the shell (1), one end of the three fixing rods (4) far away from the driving shaft (3) is all fixedly connected with the wind cups (5), and the three wind cups (5) are rotationally symmetrically arranged.
3. The dust removing device for the heat collecting pipe of the solar water heater according to claim 1, wherein the mounting ring (20), the transmission shaft (21) and the reciprocating screw rod (23) are arranged in an inclined angle.
4. The dust removing device for the heat collecting pipe of the solar water heater according to claim 1, wherein a plurality of bamboo fiber bristles are arranged on the inner side wall of the cleaning ring (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010275210.7A CN111306819B (en) | 2020-04-09 | 2020-04-09 | Dust cleaning device for heat collecting pipe of solar water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010275210.7A CN111306819B (en) | 2020-04-09 | 2020-04-09 | Dust cleaning device for heat collecting pipe of solar water heater |
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| Publication Number | Publication Date |
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| CN111306819A CN111306819A (en) | 2020-06-19 |
| CN111306819B true CN111306819B (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010275210.7A Active CN111306819B (en) | 2020-04-09 | 2020-04-09 | Dust cleaning device for heat collecting pipe of solar water heater |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102021122806A1 (en) | 2021-07-02 | 2023-01-05 | Sisi Ag | Solar thermal device, solar thermal module, energy supply system and method for operating a solar thermal device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2044021U (en) * | 1988-09-07 | 1989-09-06 | 山东农业大学 | Speed stabilizing device for a.c. permanent-magnet generator |
| CN102401495A (en) * | 2011-11-17 | 2012-04-04 | 江苏华商企业管理咨询服务有限公司 | Self-cleaning solar water heater |
| DE102012002881A1 (en) * | 2012-02-14 | 2013-08-14 | Anton Jäger | Cleaning system for cleaning open land system in solar park, has drive unit including energy collecting device for solar and/or wind energy, and automatically changed into active drive mode from passive wait mode when condition is met |
| CN110552841A (en) * | 2019-09-11 | 2019-12-10 | 杭州琼网计算机网络有限公司 | Rotating speed control device of wind power generation equipment |
| CN110822732A (en) * | 2019-11-28 | 2020-02-21 | 江苏桑力太阳能产业有限公司 | Dust removal type solar water heater with anti-freezing function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287936A (en) * | 2010-06-17 | 2011-12-21 | 杨丽 | Self-cleaning heat-collecting pipe |
-
2020
- 2020-04-09 CN CN202010275210.7A patent/CN111306819B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044021U (en) * | 1988-09-07 | 1989-09-06 | 山东农业大学 | Speed stabilizing device for a.c. permanent-magnet generator |
| CN102401495A (en) * | 2011-11-17 | 2012-04-04 | 江苏华商企业管理咨询服务有限公司 | Self-cleaning solar water heater |
| DE102012002881A1 (en) * | 2012-02-14 | 2013-08-14 | Anton Jäger | Cleaning system for cleaning open land system in solar park, has drive unit including energy collecting device for solar and/or wind energy, and automatically changed into active drive mode from passive wait mode when condition is met |
| CN110552841A (en) * | 2019-09-11 | 2019-12-10 | 杭州琼网计算机网络有限公司 | Rotating speed control device of wind power generation equipment |
| CN110822732A (en) * | 2019-11-28 | 2020-02-21 | 江苏桑力太阳能产业有限公司 | Dust removal type solar water heater with anti-freezing function |
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Effective date of registration: 20210915 Address after: 276000 intersection of Chuangye road and Xinggong Road, Linyi Industrial Park, Lanshan District, Linyi City, Shandong Province Applicant after: SHANDONG HUALIN NEW ENERGY EQUIPMENT Co.,Ltd. Address before: 075002 No. 5, Xiyuan Middle Road, Qiaoxi District, Zhangjiakou City, Hebei Province Applicant before: Wang Chao |
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