CN108247540B - Dust collecting device and combination of dust collecting device and power tool - Google Patents
Dust collecting device and combination of dust collecting device and power tool Download PDFInfo
- Publication number
- CN108247540B CN108247540B CN201611241402.6A CN201611241402A CN108247540B CN 108247540 B CN108247540 B CN 108247540B CN 201611241402 A CN201611241402 A CN 201611241402A CN 108247540 B CN108247540 B CN 108247540B
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- dust collecting
- straight line
- air inlet
- inlet pipe
- airflow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a dust collecting device and a combination of the dust collecting device and a power tool, wherein the dust collecting device comprises: a housing and a filter element, wherein the housing comprises at least one airflow outlet; the casing still includes: an air inlet pipe for guiding the air flow to enter the shell along a first linear direction and a dust collecting box connected to one end of the air inlet pipe; wherein, the other end of the air inlet pipe far away from the dust collecting box forms an airflow inlet, and the filter element is arranged between the airflow inlet and the airflow outlet; the junction of air-supply line and dust collection box still is formed with: the wind direction conversion structure is used for reversing airflow which enters from the air inlet pipe and flows along the first linear direction and then flows into the dust collection box; the wind direction conversion structure includes: the guide part is used for guiding the airflow flowing along the first straight line direction to flow along a curve, and the guided airflow has a component along the first straight line direction and a component perpendicular to the first straight line direction. The dust collecting device has simple structure and good dust collecting effect.
Description
Technical Field
The invention relates to a dust collecting device and a combination of the dust collecting device and a power tool.
Background
Sanding power tools such as sanders and angle grinders generate a large amount of dust during operation, and existing sanders are generally equipped with a dust collecting device for absorbing the dust in order to avoid pollution of the dust to the environment and damage to users. However, the existing dust collecting device has a complicated structure, and dust is easy to block the filter paper in the dust collecting device, thereby causing a problem of poor dust collection effect.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a dust collecting device which is simple in structure and high in dust collection effect.
In order to achieve the above object, the present invention adopts the following technical solutions:
a dust collecting apparatus comprising: the filter comprises a shell and a filter element, wherein the shell comprises at least one airflow outlet used for being connected with the external environment, and the filter element is arranged in the shell; the casing still includes: the air inlet pipe is used for guiding airflow to enter the shell along a first linear direction, and the dust collection box is connected to one end of the air inlet pipe; wherein, the other end of the air inlet pipe far away from the dust collecting box forms an airflow inlet, and the filter element is arranged between the airflow inlet and the airflow outlet; the junction of air-supply line and dust collection box still is formed with: the wind direction conversion structure is used for reversing airflow which enters from the air inlet pipe and flows along the first linear direction and then flows into the dust collection box; the wind direction conversion structure includes: the guide part is used for guiding the airflow flowing along the first straight line direction to flow along a curve, and the guided airflow has a component along the first straight line direction and a component perpendicular to the first straight line direction.
Further, the guide portion includes: the dust collection box comprises a curved surface and a stop surface, wherein the included angle between the tangent plane of any point on the curved surface and the first straight line is more than or equal to 0 degree and less than or equal to 15 degrees, and the stop surface is used for stopping airflow from flowing into the dust collection box along the first straight line direction; the stop surface is connected to the curved surface and surrounds the curved surface to form at least one air outlet used for communicating the air inlet pipe with the dust collecting box.
Alternatively, the guide portion includes: the tangential plane of any point on the curved surface is parallel to the first straight line, and the stopping surface is used for stopping airflow from flowing into the dust collection box along the first straight line direction; in the first straight line direction, the curved surface comprises a first end arranged at the joint of the air inlet pipe and the dust collection box and a second end opposite to the first end, wherein the stop surface is formed at the second end of the curved surface.
Further, the curved surface is surrounded by at least one air outlet opening towards the direction vertical to the first straight line; the air outlet is communicated with the air inlet pipe and the dust collecting box.
Further, the included angle between the stop surface and the first straight line is greater than or equal to 60 degrees and smaller than or equal to 90 degrees.
Further, the projection of the curved surface in a plane perpendicular to the first straight line includes at least one arc located outside the projection of the air inlet duct in the plane.
Further, the projection of the curved surface in a plane perpendicular to the first straight line includes at least two arcs with different curvatures.
Further, the projection of the stop surface in a plane perpendicular to the first line covers the projection of the air inlet duct in this plane.
Furthermore, the air inlet pipe is a hollow cylinder, the dust collection box comprises a truncated cone-shaped cavity wall taking a second straight line parallel to the first straight line as a central line, and the projection of the air inlet pipe in a plane perpendicular to the first straight line is eccentric relative to the projection of the cavity wall in the plane.
A combination power tool and dust collection device, the power tool comprising: the dust collector is the dust collector mentioned above.
The invention has the advantages that: the guide part for reversing the airflow is arranged at the joint of the air inlet pipe and the dust collection box, the structure is simple, the airflow flowing along the first linear direction can flow into the dust collection box along a curve, the flow speed of the airflow can be increased, the airflow is convenient to accumulate at the tail part of the dust collection box, and then the filter element can be prevented from being blocked.
Drawings
Fig. 1 is a schematic configuration diagram of a combination of a power tool and a dust collecting device as a first embodiment;
FIG. 2 is a schematic view of the dust collector of FIG. 1;
FIG. 3 is a rear view of the dust collection device of FIG. 2;
FIG. 4 is a cross-sectional view of the dust collector of FIG. 3 taken along line A-A;
FIG. 5 is a perspective view of the dust collector of FIG. 2 with the housing partially cut away;
FIG. 6 is a perspective view of a portion of the housing and guide of the dust collection device of FIG. 5;
FIG. 7 is a perspective view of the guide of FIG. 5;
fig. 8 is a view of the curved surface of the guide portion and the air inlet duct of fig. 5 in a projection in a plane perpendicular to the first straight line;
fig. 9 is a schematic view of a guide part in the dust collecting device according to the second embodiment.
Detailed Description
The sanding type of power tool generates a large amount of dust during operation, and in order to avoid the dust polluting the environment and causing troubles to users, the existing power tools are generally provided with a dust collecting device. Fig. 1 shows a combination of a power tool 100 and a dust collecting device 200 of a first embodiment, wherein the power tool 100 may be a sander, an angle grinder, an abrasive belt machine, etc., and may be specifically exemplified herein as a sander.
The power tool 100 may include: a tool housing 11, a prime mover 12 and a fan 13, wherein the prime mover 12 and the fan 13 are disposed in the tool housing 11, and the prime mover 12 can simultaneously drive the fan 13 to rotate when outputting power, so that a dust-laden air flow is discharged from an outlet 111 provided in the tool housing 11. Here, the dust collecting device 200 is connected to the outlet 111 of the tool housing 11 so that dust generated during the operation of the power tool 100 can be collected.
As shown in fig. 1 to 4, the dust collection device 200 includes: the air filter comprises a shell 201 and a filter element 202 arranged in the shell 201, wherein the filter element 202 is arranged in the shell 201, and the filter element 202 is used for filtering the air flow flowing into the shell 201 to enable dust to be left in the shell 201 and the filtered air flow to flow out of the shell 201.
As shown in fig. 2 to 5, the housing 201 includes: an air inlet pipe 21 and a dust collection box 22, wherein the air inlet pipe 21 is used for guiding the air flow to enter the shell 201 along the direction of the first straight line 101, and the dust collection box 22 is used for collecting dust. The air inlet duct 21 and the dust box 22 are arranged substantially along the first straight line 101, that is, the dust box 22 is connected to one end of the air inlet duct 21 along the first straight line 101, an air inlet 211 is formed at one end of the air inlet duct 21 away from the dust box 22, an air outlet 221 for connection with the external environment is formed at one end of the dust box 22 away from the air inlet duct 21, and the filter element 202 is disposed between the air inlet 211 and the air outlet 221, so that the air flowing out from the power tool 100 enters the housing 201 through the air inlet 211 and flows out of the dust collecting device 200 through the air outlet 221 after being filtered by the filter element 202. In the present invention, a wind direction changing structure 30 is further formed at the connection portion between the air inlet duct 21 and the dust box 22, the wind direction changing structure 30 is used for changing the direction of the airflow entering from the air inlet duct 21 and flowing along the first straight line 101 to flow into the dust box 22, and specifically, the wind direction changing structure 30 includes a guide portion 31 for guiding the airflow, the guide portion 31 can guide the airflow flowing along the first straight line 101 to flow along a curve, and the airflow guided by the guide portion 31 has a component along the first straight line 101 and a component along the direction perpendicular to the first straight line 101. Therefore, the air flow entering the air inlet duct 21 in the direction of the first straight line 101 is reversed by the guide part 31 before entering the dust box 22, so that the air flow flowing in the direction of the first straight line 101 flows in a curved line after passing through the guide part 31 and the reversed air flow has not only a component in the direction of the first straight line 101 but also a component in the direction perpendicular to the first straight line 101, so that the reversed air flow can move to the rear of the dust box 22 substantially in the direction parallel to the first straight line 101. In the invention, the guide part 31 is adopted to change the direction of the airflow, so that the airflow flowing along the straight line is changed into the airflow flowing along the tangential direction, thereby being beneficial to the accumulation of the airflow at the tail part of the dust collecting box 22 and further avoiding the problem of low dust collection effect caused by the early accumulation of dust at the filter element 202 to block the filter element 202. It should be noted that the wind direction converting structure 30 is disposed at the connection between the air inlet duct 21 and the dust collecting box 22, and in fact, the wind direction converting structure 30 should be considered as belonging to the protection technical solution of the present invention as long as the wind direction converting structure is disposed at or near the connection between the air inlet duct 21 and the dust collecting box 22, and the wind direction converting structure is not substantially different from the present invention.
As shown in fig. 4 to 6, a guide portion 31 is provided at the junction of the air inlet duct 21 and the dust box 22, and the guide portion 31 may be integrally formed with the air inlet duct 21, for example, extending from one end of the air inlet duct 21 near the dust box 22 toward the dust box 22; alternatively, the guiding portion 31 may be integrally formed with the dust collecting box 22, for example, the guiding portion 31 extends from the inner wall of the dust collecting box 22 toward the direction away from the air inlet pipe 21; still alternatively, the guide portion 31 may be formed separately and then fixed to the air inlet duct 21 or the dust box 22. Of course, in other embodiments, the air inlet duct 21 and the dust box 22 may be integrally formed, and the guide portion 31 may extend away from the air inlet duct 21 at or near the joint of the air inlet duct 21 and the dust box; alternatively, the guide portion 31 may be formed separately and then fixed to the junction of both of them or the vicinity of the junction.
Specifically, as shown in fig. 4 to 7, the guide part 31 includes a curved surface 311 and a stopper surface 312 inside the dust box 22. Wherein, the tangent plane of any point on the curved surface 311 is parallel to the first straight line 101. As shown in fig. 7 and 8, or the projection of the curved surface 311 in a plane perpendicular to the first straight line 101 is a curved line. The stop surface 312 is used for stopping the airflow flowing into the dust collecting box 22 along the first straight line 101, the stop surface 312 is a plane having an included angle of 60 degrees or more and 90 degrees or less with the first straight line 101, and further, the stop surface 312 is perpendicular to the first straight line 102. The curved surface 311 further surrounds and forms at least one air outlet 313 which is open in a direction perpendicular to the first straight line 101, the air outlet 313 communicates with the air inlet duct 21 and the dust box 22, and in the embodiment, the guide portion 31 forms one air outlet 313 for example, but the invention is not limited thereto. Curved surface 311 further includes first and second opposite ends 311a and 311b along first straight line 101, wherein first end 311a of curved surface 311 is disposed at the junction of air inlet duct 21 and dirt tray 22, and stop surface 312 is disposed at second end 311b of curved surface 311. Thus, after the airflow flows out from the air inlet pipe 21, the airflow enters the air channel formed by the curved surface 311 and the stop surface 312, and under the guiding action of the curved surface 311 and the stop surface 312, the airflow flows out from the air outlet 313 in a whirlwind manner and flows into the dust collection box 22. Therefore, the guide part 31 formed by the curved surface 311 and the stop surface 312 has a simple structure, and the air flow has a high flow velocity when entering the dust collection box 22, thereby facilitating the accumulation of the air flow at the tail part of the dust collection box 22.
It should be noted that, in other embodiments, an included angle between the tangent plane on the curved surface and the first straight line may be greater than or equal to 0 degrees and less than or equal to 15 degrees, that is, the curved surface may also be inclined relative to the first straight line, or the curved surface may also be a special-shaped curved surface, and the stop surface is connected with the curved surface and surrounds to form the air outlet, wherein, when the curved surface is the special-shaped curved surface, the stop surface may be integrally formed with the curved surface, and at this time, a portion of the integrally formed whole for stopping the air flow from directly flowing into the dust collection box along the first straight line direction may be considered as the stop.
In addition, as for the stop surface, the stop surface is not limited to a plane, and may be considered as the stop surface as long as it can stop the air flow flowing into the dust box in the first linear direction. For example, when the tangent plane at any point on the curved surface is parallel to the first straight line, the stop surface may protrude toward the dust box at the end of the curved surface away from the air inlet duct.
More specifically, the air inlet duct 21 may be a hollow cylinder extending along the first straight line 101 and having the first straight line 101 as a center line, the dust box 22 includes a truncated cone shaped cavity wall 222 having a second straight line 102 parallel to the first straight line 101 as a center line, and the dust box 22 further includes a connecting portion 223 disposed between the air inlet duct 21 and the cavity wall 222 for connecting the two. Wherein the projection of the air inlet duct 21 in a plane perpendicular to the first line 101 is off-center with respect to the projection of the chamber wall 222 in that plane. Thus, when the guiding part 31 is formed, especially when the guiding part 31 only has one air outlet 313, the air inlet pipe 21 is eccentric relative to the dust collection box 22 to make room for the air outlet 313, so that the size of the air outlet 313 can be ensured, the air volume loss of the air flow at the air outlet 313 can be reduced, and the air volume can be increased.
As shown in fig. 8, the projection of the curved surface 311 on a plane perpendicular to the first straight line 101 is a curve with two ends not closed, and the curve may include at least two first circular arcs 311c and two second circular arcs 311d with different curvatures, wherein the first circular arcs 311c and the projection of the air inlet duct 21 on the plane have the same curvature radius, and further, the first circular arcs 311c coincide with a portion of the projection of the air inlet duct 21 on the plane. The radius of curvature of the second circular arc 311d is larger than that of the first circular arc 311c, and the second circular arc 311d is also located outside the projection of the air inlet duct 21 in the plane. The projected edge of stop surface 312 in this plane is substantially the same configuration as the projected curved surface 311 in this plane, and the projected stop surface 312 in this plane also covers the projected air inlet duct 21 in this plane.
The present invention further provides a dust collecting device for a power tool of a second embodiment, which has the same air inlet duct, dust collecting box, filter element and wind direction converting structure as the dust collecting device of the first embodiment, and the difference is only the specific structure of the guiding portion, wherein the structures of the first embodiment and the structure of the second embodiment can be applied to the present embodiment, and detailed description is omitted, and only the differences between the first embodiment and the second embodiment will be described below.
As shown in fig. 9, the guide portion 41 in this embodiment is formed with two air outlets 413, the guide portion 41 includes two separated curved surfaces 411, the stop surface 412 connects the two curved surfaces 411, and the two curved surfaces 411 and the stop surface 412 surround to form the two air outlets 413, wherein the curved surfaces 411 are substantially S-shaped, and the air outlets 413 are disposed at two ends of the S-shape.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. A dust collecting apparatus comprising:
a housing comprising at least one airflow outlet for connection to an external environment;
a filter element disposed within the housing;
the housing includes:
an air inlet pipe for guiding the air flow to enter the shell along a first linear direction;
a dust collecting box connected to one end of the air inlet pipe;
the other end of the air inlet pipe, which is far away from the dust collection box, forms an airflow inlet, and the filter element is arranged between the airflow inlet and the airflow outlet;
the junction of air-supply line and dust collection box still is formed with:
the wind direction conversion structure is used for reversing the airflow which enters from the air inlet pipe and flows along the first linear direction and then flows into the dust collection box;
the wind direction conversion structure includes:
the guide part comprises a curved surface and a stop surface which are positioned in the dust collecting box, the curved surface and the stop surface surround an air channel which allows the air flow to enter, and the curved surface and the stop surface are used for guiding the air flow flowing along the first linear direction to flow along a curve and the guided air flow has a component along the first linear direction and a component perpendicular to the first linear direction.
2. The dust collecting apparatus of claim 1, wherein:
an included angle between a tangent plane of any point on the curved surface and the first straight line is more than or equal to 0 degree and less than or equal to 15 degrees;
the stopping surface is used for stopping airflow from flowing into the dust collection box along the first linear direction;
the stop surface is connected to the curved surface and surrounds the curved surface to form at least one air outlet for communicating the air inlet pipe with the dust collection box.
3. The dust collecting apparatus of claim 1, wherein:
the tangent plane of any point on the curved surface is parallel to the first straight line;
the stopping surface is used for stopping airflow from flowing into the dust collection box along the first linear direction;
in the first straight line direction, the curved surface comprises a first end arranged at the joint of the air inlet pipe and the dust collection box and a second end opposite to the first end, wherein the stop surface is formed at the second end of the curved surface.
4. A dust collecting device according to claim 3, wherein:
the curved surface is surrounded by at least one air outlet which is opened towards the direction vertical to the first straight line; the air outlet is communicated with the air inlet pipe and the dust collecting box.
5. A dust collecting device according to claim 3, wherein:
the included angle between the stop surface and the first straight line is greater than or equal to 60 degrees and smaller than or equal to 90 degrees.
6. A dust collecting device according to claim 3, wherein:
the projection of the curved surface in a plane perpendicular to the first straight line at least comprises a circular arc which is positioned outside the projection of the air inlet pipe in the plane.
7. A dust collecting device according to claim 3, wherein:
the projection of the curved surface in a plane perpendicular to the first straight line at least comprises two arcs with different curvatures.
8. A dust collecting device according to claim 3, wherein:
the projection of the stop surface in a plane perpendicular to the first straight line covers the projection of the air inlet pipe in the plane.
9. The dust collecting apparatus of claim 1, wherein:
the air inlet pipe is a hollow cylinder, the dust collection box comprises a truncated cone-shaped cavity wall taking a second straight line parallel to the first straight line as a central line, and the projection of the air inlet pipe in a plane perpendicular to the first straight line is eccentric relative to the projection of the cavity wall in the plane.
10. A combination power tool and dust collection device, the power tool comprising: a tool housing and a fan disposed within the tool housing, the dust collection device being as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611241402.6A CN108247540B (en) | 2016-12-29 | 2016-12-29 | Dust collecting device and combination of dust collecting device and power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611241402.6A CN108247540B (en) | 2016-12-29 | 2016-12-29 | Dust collecting device and combination of dust collecting device and power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108247540A CN108247540A (en) | 2018-07-06 |
| CN108247540B true CN108247540B (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611241402.6A Active CN108247540B (en) | 2016-12-29 | 2016-12-29 | Dust collecting device and combination of dust collecting device and power tool |
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| Country | Link |
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| CN (1) | CN108247540B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113099638A (en) * | 2021-05-15 | 2021-07-09 | 牛世强 | Electrical cabinet for controlling electrical equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2343393A (en) * | 1998-07-14 | 2000-05-10 | Bosch Gmbh Robert | Hand held machine tool dust extraction system |
| CN2735924Y (en) * | 2004-10-15 | 2005-10-26 | 王瑞昌 | Hand-held type dust-collecting air-blowing cleaner |
| CN101061930A (en) * | 2006-04-24 | 2007-10-31 | 盖多·瓦伦蒂尼 | Dust collection container with bladed element for power tool with suction capacity |
| CN203542559U (en) * | 2013-09-30 | 2014-04-16 | 南京德朔实业有限公司 | Dust collection accessory |
| CN203738747U (en) * | 2013-09-30 | 2014-07-30 | 南京德朔实业有限公司 | Dust collecting accessory |
| CN105983948A (en) * | 2015-02-13 | 2016-10-05 | 张玮庭 | Reversing control structure of pneumatic tool |
| CN106073629A (en) * | 2016-01-20 | 2016-11-09 | 江苏美的清洁电器股份有限公司 | Hand held cleaner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20030961A1 (en) * | 2003-05-14 | 2004-11-15 | Guido Valentini | MOTORIZED TOOL WITH SUCTION CAPACITY AND DUST COLLECTION. |
-
2016
- 2016-12-29 CN CN201611241402.6A patent/CN108247540B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2343393A (en) * | 1998-07-14 | 2000-05-10 | Bosch Gmbh Robert | Hand held machine tool dust extraction system |
| CN2735924Y (en) * | 2004-10-15 | 2005-10-26 | 王瑞昌 | Hand-held type dust-collecting air-blowing cleaner |
| CN101061930A (en) * | 2006-04-24 | 2007-10-31 | 盖多·瓦伦蒂尼 | Dust collection container with bladed element for power tool with suction capacity |
| CN203542559U (en) * | 2013-09-30 | 2014-04-16 | 南京德朔实业有限公司 | Dust collection accessory |
| CN203738747U (en) * | 2013-09-30 | 2014-07-30 | 南京德朔实业有限公司 | Dust collecting accessory |
| CN105983948A (en) * | 2015-02-13 | 2016-10-05 | 张玮庭 | Reversing control structure of pneumatic tool |
| CN106073629A (en) * | 2016-01-20 | 2016-11-09 | 江苏美的清洁电器股份有限公司 | Hand held cleaner |
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| CN108247540A (en) | 2018-07-06 |
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Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Patentee after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee before: NANJING CHERVON INDUSTRY Co.,Ltd. |