CN105370589A - A blower fan - Google Patents
A blower fan Download PDFInfo
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- CN105370589A CN105370589A CN201410378271.0A CN201410378271A CN105370589A CN 105370589 A CN105370589 A CN 105370589A CN 201410378271 A CN201410378271 A CN 201410378271A CN 105370589 A CN105370589 A CN 105370589A
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- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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Abstract
The invention provides a blower fan comprising a main machine which comprises an outer shell, a motor and a fan. The outer shell comprises a main machine air duct in which the motor and the fan are at least partially accommodated. The motor drives the fan to rotate with a first axis as the axis. The blower fan also comprises an air flow guide component which comprises an air drum used for guiding air flow, and a diversion member capable of guiding a part of air flow in the air drum to flow in other directions deviating from the first axis. The blower fan at least can serve as a dryer. With the diversion member, the blower fan can output combined air flow, and air flow, which deviates from the original guide direction, in the air flow disperses the counter-acting force brought by blowing, so that the feeling of fatigue of users during use is reduced and the operation feel is improved; air flow output at multiple angles improve the blowing effect, so that slice-shaped objects such as leaves can be blown easily.
Description
Technical field
The present invention relates to a kind of blower fan, be specifically related to a kind of blower fan being suitable for drying.
Background technique
Growing along with blower, people have had higher requirement to the travelling comfort on probation of blower and airflow effects; Blower blowout in the past be all direct current wind because airflow direction is single, therefore can produce a very large back pressure, this defeats urgent wrist, people is used uncomfortable; Simultaneously because airflow direction is single, be easy to make leaf etc. be attached to ground and be not easy to blow afloat, airflow effects is bad.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of blower fan that can export composite stream.
In order to realize above-mentioned target, the present invention adopts following technological scheme:
A kind of blower fan, comprise: main frame, main frame comprises: shell, motor and fan, and shell comprises: one is at least formed at main frame inside and the main frame air channel be in communication with the outside, motor and fan are at least partially housed in main frame air channel, and motor-driven fan is that axle rotates with first axle; This blower fan also comprises: air-flow guidance set; Main frame air channel at least has an air duct joint; Air-flow guidance set comprises: one docks the air duct that also at least can lead along parallel first axle direction to air-flow, a fraction that can lead in air duct by the conducting element flowed along other directions of departing from first axle with air duct joint; Conducting element is arranged in air duct and it at least leads to the air-flow of air duct away from one end place of fan.
Further, main frame air channel at least has an air duct joint; Conducting element is arranged in air duct; Conducting element comprises:
Plural flap, its at least make through air-flow produce skew or/and turn to;
Honeycomb duct, the air-flow that can lead flows along parallel first axle direction.
Further, flap profile is identical and be arranged on the periphery of honeycomb duct uniformly.
Further, flap and honeycomb duct one-body molded, conducting element is arranged on the inside of air duct by flap.
Further, flap is source near one end of fan, is end away from one end of fan; Flap comprises:
Aerofoil windward, it can stop that the air-flow entered from source continues along the flowing of parallel first axle direction and makes the air-flow entered from source flow out end along the direction of departing from first axle direction.
Further, flap also comprises:
By wind aerofoil, it can stop that the air-flow entered from end continues along the flowing of parallel first axle direction and makes the air-flow entered from end flow out source along the direction of departing from first axle direction.
Further, flap forms stop surface in its source; Flap at its end by aerofoil windward with intersected the tapered end formed by wind aerofoil.
Further, stop surface comprises two and to be parallel to each other and all perpendicular to the straight line of first axle; Windward aerofoil be one by the curved surface of one of them straight line as bus, the wire of this curved surface is a plane curve, and straight line is perpendicular to the plane at this plane curve place.
Further, by wind aerofoil be one by the curved surface of another straight line as bus, the wire of this curved surface is a plane curve, and straight line is perpendicular to the plane at this plane curve place.
Further, the span of the maximum angle of the relative first axle of aerofoil is 30 degree to 45 degree windward, is 15 degree to 20 degree by the span of the maximum angle of the relative first axle of wind aerofoil.
Or, the present invention is as a kind of blower, comprise: main frame, main frame comprises: shell, motor and fan, shell comprises: one is at least formed at main frame inside and the main frame air channel be in communication with the outside, motor and fan are at least partially housed in main frame air channel, and motor-driven fan is that axle rotates with first axle; This blower also comprises: air-flow guidance set; Air-flow guidance set comprises: an air duct docked with air duct joint, and air duct is formed with an air duct passage at least extended along first axle direction, and air duct passage comprises: the first diversion section; First diversion section comprises: be positioned at peripheral, for generation of the annular air-out region of whirlwind, be positioned at the center wind ejection region that annular air-out regional center can export straight air stream.
Further, the first diversion section is near air duct passage exhaust outlet; Air duct passage also comprises: the second diversion section, second diversion section is arranged between fan and the first diversion section, second diversion section only has a upstream diversion cavity, and diversion cavity center, upstream air-flow is directed to center wind ejection region, the air-flow at periphery place is directed to annular air-out region.
Further, be provided with a conducting element in air duct, one section in air duct between conducting element and fan residing for the second diversion section, conducting element one section is the first diversion section.
Further, conducting element comprises:
Plural flap, its at least make through air-flow produce whirlwind;
Honeycomb duct, along the flowing of parallel first axle direction in the whirlwind that its air-flow that can lead produces at flap.
Further, center wind ejection region and annular air-out region are 1:4 ~ 7 in the span of the ratio of the sectional area in the vertical cross section of first axle.
Usefulness of the present invention is: enable blower fan export the air-flow of compound by arranging a conducting element, departs from original water conservancy diversion direction air dispersion and to dry the reaction force brought, alleviate sense of fatigue when user uses, improve operating experience in this air-flow; And the air-flow that these multi-angles export improves airflow effects, and the laminar object of some leaves and so on can be made easily to be blown afloat.
Accompanying drawing explanation
Fig. 1 is the appearance schematic diagram of a blower fan of the present invention preferred embodiment;
Fig. 2 is internal structure schematic diagram embodiment illustrated in fig. 1;
Fig. 3 is the structural representation of middle air duct end embodiment illustrated in fig. 1;
Fig. 4 is the structural representation of middle conducting element embodiment illustrated in fig. 1;
Fig. 5 is that conducting element shown in Fig. 4 is from structural representation during parallel first axle direction observation;
Fig. 6 is cross section (intercepting with the cross section perpendicular to the aerofoil bus windward) structural representation of the flap of conducting element shown in Fig. 4.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
Shown in 6, blower fan of the present invention is as being preferably a kind of blower 100, and it comprises: the gentle stream guidance set 20 of main frame 10.
Main frame 10 comprises: shell 11, motor 12, fan 13.
Wherein, shell 11 comprises: one is at least formed at main frame 10 inside and the main frame air channel 111 be in communication with the outside.Motor 12 and fan 13 are at least partially housed in described main frame air channel, motor 12 drive fan 13 with first axle A for axle rotates.
More specifically, main frame air channel 111 is the cavity formed by shell 11 in main frame 10, it at least comprises an air duct joint 111a, motor 12 and fan 13 are integrally arranged on end or the inside of this cavity after assembling, can cause the change of air-flow in this cavity when fan 13 rotates.
As a kind of preferred version, main frame 10 also comprises air guide sleeve 14, and this air guide sleeve is arranged on the adjustment of fan 13 both sides realization to air-flow.
Air-flow guidance set 20 comprises: air duct 21 and conducting element 22, and they can be two also can be an integrally formed one-piece element by the part be assembled.It should be noted that conducting element 22 can need to carry out quick detach according to user.
Wherein, one end of air duct 21 is docked with air duct joint 111a, and air duct 21 at least can lead along parallel first axle A direction to air-flow.Specifically, air duct 21 is formed with an air duct passage 211 at least extended along first axle A direction.
The fraction that conducting element 22 can lead in air duct 21 is flowed by along other directions of departing from first axle A.Specifically, conducting element 22 to be arranged in air duct 21 and it at least leads to the air-flow of air duct 21 away from one end place of fan 13.
So, conducting element 22 at least makes air duct passage 211 comprise the first diversion section 212 of a generation composite stream; First diversion section 212 comprises: be positioned at peripheral annular air-out region 212a, be positioned at the center wind ejection region 212b of annular air-out regional center.
It should be noted that, composite stream refers to the air-flow comprising two or more flow direction in this application
Annular air-out region 212a and center wind ejection region 212b exports two kinds of different air-flows respectively, the air-flow that annular air-out region 212a exports diversed 22 guiding departs from original flow direction, if suitably arrange guiding element 22, can obtain at annular air-out region 212a the whirlwind being similar to tornado, and the fraction at 212b Ze Shi center, center wind ejection region still keeps original flow inversion to export.
Between fan 13 and conducting element 22 one section of air duct passage 211 is the second diversion section 213, second diversion section 213 only has a upstream diversion cavity 213a, and diversion cavity 213a center, upstream air-flow is directed to center wind ejection region 212b, the air-flow at periphery place is directed to annular air-out region 212a.
As concrete technological scheme, air duct 21 is a barrel structure, and it is provided with the inwall of solid of rotation, and in order to obtain higher wind speed, this solid of rotation inwall can shrink gradually.
If air-flow is only subject to the effect of air duct 21 inwall, air-flow linearly flows, so be the second diversion section 213 by fan 13 to a section of conducting element 22 in air duct 21, the space that this section of inwall surrounds is upstream diversion cavity 213a.
Preferably, in order to realize composite flow guide arranging conducting element 22 place, conducting element 22 comprises: plural flap 221 and a honeycomb duct 222.
Wherein, flap 221 can make to produce skew through its air-flow, turn to or not only offset but also turn to; The lead air-flow of its inside of honeycomb duct 222 continues along the flowing of parallel first axle A direction.Honeycomb duct 222 at least comprises the inner tubal wall 222a of a solid of rotation.The effect of honeycomb duct 222 is to ensure enough straight blowing amounts.
More specifically, flap 221 profile is identical and be arranged on the circumferencial direction of honeycomb duct 222 uniformly.
Flap 221 is source a near one end of fan 13, be end b away from one end of fan; Flap 221 comprises: aerofoil 221a and by wind aerofoil 221b windward.
Aerofoil 221a can stop that the air-flow entered from source a continues along the flowing of parallel first axle A direction and makes the air-flow entered from source a flow out end b along the direction of departing from first axle A direction windward.
In fact in order to realize skew guiding, flap 221 is only needed to form aerofoil 221a windward.
Can be stopped that the air-flow entered from end b continues along the flowing of parallel first axle A direction and makes the air-flow entered from end b flow out source a along the direction of departing from first axle A direction by wind aerofoil 221b.
Be and the passage that the 221a of aerofoil windward of adjacent flap 221 coordinates formation one to make air-flow have certain rotation direction by the effect of wind aerofoil 221b, this multiple combination of channels distributed in the circumferential get up to enable the periphery of conducting element to realize whirlwind.
Preferably, flap 221 is one-body molded with honeycomb duct 222, and conducting element 22 is arranged on the inside of air duct 21 by flap 221.
As a kind of preferred version, flap 221 forms stop surface 221c at its source a; Flap 221 at its end by aerofoil 221a windward with intersected by wind aerofoil 221b the tapered end 221d formed; Stop surface 221d comprises two and to be parallel to each other and all perpendicular to the straight line (not identifying in figure) of first axle A.
With reference to shown in Fig. 6, windward aerofoil 221a be one by the curved surface of one of them straight line as bus, the wire of this curved surface is a plane curve, straight line is perpendicular to the plane at this plane curve place, equally, by wind aerofoil 221b be one by the curved surface of another straight line as bus, the wire of this curved surface is a plane curve, and straight line is perpendicular to the plane at this plane curve place.
With reference to shown in Fig. 6, guiding is deflected preferably in order to obtain, the span of the maximum angle α of the relative first axle A of aerofoil 221a is 30 degree to 45 degree windward, and being preferably 36.5 degree by the span of the maximum angle β of the relative first axle A of wind aerofoil 221b is 15 degree to 20 degree, is preferably 17 degree.
The angle of the relative first axle A of the aerofoil 221a wire that refers to the curved surface of aerofoil 221a windward and angle formed by the straight line being parallel to first axle A direction windward, is referred to by the wire of the curved surface of wind aerofoil 221b and angle formed by the straight line being parallel to first axle A direction by the angle of the relative first axle A of wind aerofoil 221b.
Windward aerofoil 221a, be smooth surface by wind aerofoil 221b, their wire is smoothed curve.
Windward aerofoil 221a, be all formed at tapered end 221d by the maximum angle of the relative first axle A of wind aerofoil 221b.
Certainly, flap 221 also can adopt other form, as long as it has a guide face crossing with first axle A, this guide face can be made up of one or their combination in curved surface, plane.
As a kind of preferred version, center wind ejection region 212b and annular air-out region 212a are 1:4 ~ 7 in the span of the ratio of the sectional area in the vertical cross section of first axle A.
We adopt same fan 13 and air duct 21 to carry out contrast experiment.
Model 1 adopts the scheme not installing conducting element 22 additional, model 2 to model 5 all adopts the scheme installing conducting element 22 additional, they except center wind ejection region 212b and annular air-out region 212a all the other dimensional parameters except the ratio difference of the sectional area in the vertical cross section of first axle A all identical, their center wind ejection region 212b and annular air-out region 212a are respectively at the sectional area ratio in the vertical cross section of first axle A: 1:4,1:5,1:6 and 1:7.
Fan 13 rotating speed is 22200 revs/min, records experimental result as follows:
Table 1
As shown in table 1, can find out that adding conducting element 22 can significantly improve wind speed, and reduce flow, reduction flow can alleviate the sense of fatigue that user uses the reaction force of blower to bring, and the wind speed simultaneously increased can make blower better finish the work.
As a kind of preferred version, the diameter ratio span of the size of conducting element 22 on first axle A and fan 13 is 1:2 ~ 4.
More than show and describe basic principle of the present invention, major character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technological scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (15)
1. a blower fan, comprise: main frame, described main frame comprises: shell, motor and fan, described shell comprises: one is at least formed at main frame inside and the main frame air channel be in communication with the outside, described motor and fan are at least partially housed in described main frame air channel, and described motor drives described fan to be that axle rotates with first axle; It is characterized in that, described blower fan also comprises: air-flow guidance set; Described air-flow guidance set comprises: an air duct that at least can lead along parallel first axle direction to air-flow, a fraction that can lead in described air duct are by the conducting element flowed along other directions of departing from first axle; Described conducting element at least leads to the air-flow of described air duct away from one end place of described fan.
2. blower fan according to claim 1, is characterized in that, described main frame air channel at least has an air duct joint; Described conducting element is arranged in described air duct; Described conducting element comprises:
Plural flap, its at least make through air-flow produce skew or/and turn to;
Honeycomb duct, the air-flow that can lead flows along parallel first axle direction.
3. blower fan according to claim 2, is characterized in that, described flap profile is identical and be arranged on the periphery of described honeycomb duct uniformly.
4. blower fan according to claim 3, is characterized in that, described flap and described honeycomb duct one-body molded, described conducting element is arranged on the inside of described air duct by described flap.
5. blower fan according to claim 2, is characterized in that, described flap is source near one end of described fan, be end away from one end of described fan; Described flap comprises:
Aerofoil windward, it can stop that the air-flow entered from described source continues along the flowing of parallel first axle direction and makes the air-flow entered from described source flow out described end along the direction of departing from first axle direction.
6. blower fan according to claim 5, is characterized in that, described flap also comprises:
By wind aerofoil, it can stop that the air-flow entered from described end continues along the flowing of parallel first axle direction and makes the air-flow entered from described end flow out described source along the direction of departing from first axle direction.
7. blower fan according to claim 6, is characterized in that, described flap forms stop surface in its source; Described flap at its end by described aerofoil windward with intersected the tapered end formed by wind aerofoil.
8. blower fan according to claim 7, is characterized in that, described stop surface comprises two and to be parallel to each other and all perpendicular to the straight line of first axle; Described aerofoil is windward for one by the curved surface of straight line described in one of them as bus, and the wire of this curved surface is a plane curve, and described straight line is perpendicular to the plane at this plane curve place.
9. blower fan according to claim 8, is characterized in that, described by wind aerofoil for one by the curved surface of straight line described in another as bus, the wire of this curved surface is a plane curve, and described straight line is perpendicular to the plane at this plane curve place.
10. blower fan according to claim 9, is characterized in that, the span of the maximum angle of the relative first axle of described aerofoil be windward 30 degree to 45, the described span by the maximum angle of the relative first axle of wind aerofoil is 15 degree to 20 degree.
11. 1 kinds of blowers, comprise: main frame, described main frame comprises: shell, motor and fan, described shell comprises: one is at least formed at main frame inside and the main frame air channel be in communication with the outside, described motor and fan are at least partially housed in described main frame air channel, and described motor drives described fan to be that axle rotates with first axle; It is characterized in that, described blower also comprises: air-flow guidance set; Described air-flow guidance set comprises: an air duct, and described air duct is formed with an air duct passage at least extended along first axle direction, and described air duct passage comprises: the first diversion section; Described first diversion section comprises: be positioned at peripheral, for generation of the annular air-out region of whirlwind, be positioned at the center wind ejection region that described annular air-out regional center can export straight air stream.
12. blowers according to claim 11, it is characterized in that, described first diversion section is near described air duct passage exhaust outlet, described air duct passage also comprises: the second diversion section, described second diversion section is arranged between described fan and the first diversion section, described second diversion section only has a upstream diversion cavity, and diversion cavity center, described upstream air-flow is directed to described center wind ejection region, the air-flow at periphery place is directed to annular air-out region.
13. blowers according to claim 12, is characterized in that, are provided with a conducting element in described air duct, and one section in described air duct between described conducting element and fan is the second diversion section, residing for described conducting element one section is the first diversion section.
14. blowers according to claim 13, is characterized in that, described conducting element comprises:
Plural flap, its at least make through air-flow produce whirlwind;
Honeycomb duct, along the flowing of parallel first axle direction in the whirlwind that its air-flow that can lead produces at described flap.
15. blowers according to claim 11, is characterized in that, described center wind ejection region and annular air-out region are 1:4 ~ 7 in the span of the ratio of the sectional area in the vertical cross section of first axle.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378271.0A CN105370589B (en) | 2014-08-01 | 2014-08-01 | Blower |
| DE202015103911.5U DE202015103911U1 (en) | 2014-08-01 | 2015-07-27 | blowers |
| GB1513434.9A GB2530868B (en) | 2014-08-01 | 2015-07-30 | Blower |
| US14/813,829 US10405714B2 (en) | 2014-08-01 | 2015-07-30 | Blower |
| CA2899061A CA2899061C (en) | 2014-08-01 | 2015-07-31 | Blower |
| FR1557352A FR3024324B3 (en) | 2014-08-01 | 2015-07-31 | BLOWER |
| AU2016100001A AU2016100001A4 (en) | 2014-08-01 | 2016-01-04 | Blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378271.0A CN105370589B (en) | 2014-08-01 | 2014-08-01 | Blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370589A true CN105370589A (en) | 2016-03-02 |
| CN105370589B CN105370589B (en) | 2019-03-08 |
Family
ID=55373098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410378271.0A Active CN105370589B (en) | 2014-08-01 | 2014-08-01 | Blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370589B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
| CN113944655A (en) * | 2020-07-17 | 2022-01-18 | 广东美的白色家电技术创新中心有限公司 | Guiding device of dust collector and dust collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913922A1 (en) * | 1979-04-06 | 1980-10-23 | Gregor Freisberg | Axial flow air conditioning fan - has V=shaped rotor blades in front of four guide vanes in cruciform pattern |
| DE4105378A1 (en) * | 1991-02-21 | 1992-08-27 | Bosch Gmbh Robert | Axial fan esp. for radiator of motor vehicle engine - avoids emission of siren noise by virtue of angle of struts constituting guide for air flow |
| CN1314828A (en) * | 1998-09-04 | 2001-09-26 | 威廉·格雷厄姆 | Shredders and shredding methods |
| CN101666321A (en) * | 2008-09-03 | 2010-03-10 | 淄博矿业集团有限责任公司 | Axial-flow type pneumatic dedusting fan |
| CN203476823U (en) * | 2013-07-25 | 2014-03-12 | 南京德朔实业有限公司 | Hand-held hair dryer and fan assembly thereof |
| CN203626841U (en) * | 2013-12-31 | 2014-06-04 | 重庆梅安森科技股份有限公司 | Cyclone dust suppressor |
-
2014
- 2014-08-01 CN CN201410378271.0A patent/CN105370589B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913922A1 (en) * | 1979-04-06 | 1980-10-23 | Gregor Freisberg | Axial flow air conditioning fan - has V=shaped rotor blades in front of four guide vanes in cruciform pattern |
| DE4105378A1 (en) * | 1991-02-21 | 1992-08-27 | Bosch Gmbh Robert | Axial fan esp. for radiator of motor vehicle engine - avoids emission of siren noise by virtue of angle of struts constituting guide for air flow |
| CN1314828A (en) * | 1998-09-04 | 2001-09-26 | 威廉·格雷厄姆 | Shredders and shredding methods |
| CN101666321A (en) * | 2008-09-03 | 2010-03-10 | 淄博矿业集团有限责任公司 | Axial-flow type pneumatic dedusting fan |
| CN203476823U (en) * | 2013-07-25 | 2014-03-12 | 南京德朔实业有限公司 | Hand-held hair dryer and fan assembly thereof |
| CN203626841U (en) * | 2013-12-31 | 2014-06-04 | 重庆梅安森科技股份有限公司 | Cyclone dust suppressor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
| CN110236280B (en) * | 2018-03-08 | 2023-12-12 | 南京泉峰科技有限公司 | Hair drier |
| CN113944655A (en) * | 2020-07-17 | 2022-01-18 | 广东美的白色家电技术创新中心有限公司 | Guiding device of dust collector and dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105370589B (en) | 2019-03-08 |
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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. |
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