CN103680842B - Soft magnetic alloy iron core transformer capable of removing eddy current - Google Patents
Soft magnetic alloy iron core transformer capable of removing eddy current Download PDFInfo
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- CN103680842B CN103680842B CN201310641257.0A CN201310641257A CN103680842B CN 103680842 B CN103680842 B CN 103680842B CN 201310641257 A CN201310641257 A CN 201310641257A CN 103680842 B CN103680842 B CN 103680842B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910001004 magnetic alloy Inorganic materials 0.000 title claims abstract description 7
- 230000005291 magnetic effect Effects 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 33
- 230000004907 flux Effects 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 230000009466 transformation Effects 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Regulation Of General Use Transformers (AREA)
- Electromagnets (AREA)
Abstract
The invention relates to a transformer capable of improving transformer eddy current loss and discloses a soft magnetic alloy iron core transformer capable of effectively removing eddy current. The amorphous alloy iron core transformer comprises a coil framework wound with a coil winding, an iron core inserted into the coil framework, and a steel plate support used for mounting and supporting of all voltage transformation elements, the iron core is an E-shaped iron core made by soft magnetic alloy, the axis portion of the coil framework is hollow, a protruding portion of the iron core is inserted into the hollow portion of the coil framework, an aluminum sheet is embedded on the outer side of the steel plate support, and an eddy current opening is arranged at an area, perpendicular to leakage magnetic flux, of the side face of the steel plate support. The soft magnetic alloy iron core transformer solves the problem that existing transformers are serious in eddy current loss and can remove eddy current loss of a conductive shell and the iron core simultaneously.
Description
Technical field
The present invention relates to a kind of device improving transformator eddy-current loss, especially eliminate can external conductive casing and iron core simultaneously for one kind
The soft magnetic alloy core transformator of eddy-current loss.
Background technology
Coil outside a conductor, and allow coil be passed through alternating current, then coil just produces alternating magnetic field.Due to
Conductor in the middle of coil circumferencial direction be can equivalent become a circle circle closed circuit, the magnetic flux in closed circuit constantly sending out
Changing, the therefore circumferencial direction in conductor can produce induction electromotive force and faradic current, and sense of current is along the circumference side of conductor
To turn-taking, just as the whirlpool of a circle circle, this electromagnetic induction is occurred to produce faradic phenomenon and be referred to as in monoblock conductor
Vortex phenomenon.The outer perimeter of conductor is longer, and the frequency of alternating magnetic field is higher, and vortex is bigger, and the vortex of conductor also can produce
Heat, if the resistivity of conductor is little, the vortex producing is very strong, and the heat of generation is just very big.
Due to there is the magnetic flux of alternation in transformer core, the therefore eddy current effect of generation can cause the eddy-current loss of transformator.
The magnetic flux of alternation induction electromotive force in the windings, also induction electromotive force in the core simultaneously, excite from becoming loop in core interior
Electric current, that is, be vortexed.Again because iron core has certain resistance, vortex flows through in the core, produces heat effect, the energy causing
Loss is exactly eddy-current loss；The magnetic flux simultaneously overflowing from iron core, also can produce sensing to the conductor of surrounding, so that conductor nearby is formed
Vortex, equally causes eddy-current loss.
The eddy-current loss producing for transformer core, often by magnetic core (iron core) many ferromagnetic conductor thin slice (such as silicon steel
Piece) it is formed by stacking, these sheet surfaces scribble the oxide of thin layer insullac or insulation.When magnetic flux passes through the stenosed section of thin slice,
It is vortexed to be limited in and flows through along the narrow and small loop of some in each, the net electromotive force in these loops is less, and the length in loop is larger,
Eddy-current loss thus can be significantly reduced.So, widely used stacked iron core in alternating current generator, electrical equipment.
For example【The patent No.】CN201220684817.1,【Title】A kind of transformator,【Notification number】CN203070898,
Disclose a kind of transformator, including stalloy circle, plastic stent, the first enamel-covered wire, the second enamel-covered wire, cover plate and be located at cover plate on
The input port at end and output port；Described plastic stent is located inside stalloy；Described first enamel-covered wire is arranged on plastic stent
Upper end, described second enamel-covered wire is arranged on the lower end of plastic stent；Before and after described stalloy circle, both sides are provided with bearing.This reality
With the new generation limiting vortex to a certain extent, but often by magnetic core (iron core) with many ferromagnetic conductor thin slices (for example
Stalloy) it is formed by stacking stalloy in the iron core of existing transformator, still cannot thoroughly solve iron core vortex loss problem,
The conditions such as cause is by producing, processing, install, mechanical strength are limited, and its thickness is between 0.25 to 0.6 millimeter, therefore still has
Larger vortex exists, and electric energy loss ratio is larger, does not meet the requirement of energy-conserving and environment-protective.
The eddy-current loss that the magnetic flux overflowing for transformer core causes, generally adopts the method iron core of electromagnetic shielding to exist
Outward, coil windings are in interior mode.
For example【The patent No.】CN201120552385.4,【Title】The vortex that disappears minitype high voltage transformator,【Bulletin
Number】CN202434311, disclose one kind disappear vortex minitype high voltage transformator, including primary side bobbin, first side winding,
Outside first side winding input lead, secondary side eight groove skeleton, secondary side winding, secondary side winding output lead, secondary side line bag
Shell, U-shaped FERRITE CORE and insulating bushing, wherein, first side winding is wound on primary side bobbin, secondary side winding around
On secondary side eight groove skeleton.This disappears vortex minitype high voltage transformator can be by most of flux shield in iron core, and peripheral conductor is subject to
Less than big magnetic flux effect, but due to increased the magnetic flux of core interior, the vortex consume that iron core occurs is more serious.
For example【The patent No.】CN200420114240.6,【Title】A kind of low magnetic leakage low-reluctance transformer,【Notification number】
CN2754191, discloses a kind of low magnetic leakage low-reluctance transformer, and it is made up of iron core, skeleton, coil, is characterized in, line
Circle is to be wound on by primary coil on 1/2 secondary coil being wound on skeleton, and another 1/2 secondary coil is wound on primary coil
Constituted, iron core is to be passed around and constituted in coil outer by stalloy or silicon steel silk.The beneficial effects of the utility model are：Due to line
Enclose the stalloy being passed around or the iron core of silicon steel silk composition surround, primary coil and secondary coil are effectively shielded,
The magnetic resistance making transformator reduces, and magnetic flux increases, and loss reduces, and can reduce the electrical appliance generation electromagenetic wave radiation to periphery
Interference.But, similarly due to increased the magnetic flux of core interior, the vortex consume that iron core occurs is more serious.
The eddy-current loss of therefore existing transformator is still serious, is not suitable for high frequency power transformation, also cannot be in severe electromagnetism
Normally use under environment.
Content of the invention
Present invention aim to address the serious problem of existing transformator eddy-current loss, there is provided one kind can eliminate simultaneously can lead
Electric shell and the vortex transformator that disappears of iron core vortex loss.
Specifically, transformator of the present invention includes being wound with the coil rack of coil windings and the iron core of insertion coil rack,
Also include the stainless steel strut for installing and supporting all transformation elements, iron core is vertically or horizontally fixed on steel by arm-tie
In board mount, described iron core is " E " the shape iron core made using magnetically soft alloy, and coil rack axial portions hollow, in the middle part of iron core
Protuberance insertion coil rack hollow part, be inlaid with aluminium flake outside stainless steel strut, stainless steel strut side and leakage magnetic flux vertical area
Domain is provided with vortex opening.
Magnetically soft alloy is a class alloy in magnetic field with high pcrmeability and low coercivity (generally below 800A/m),
Easily magnetize under external magnetic field, remove magnetic induction basic disappearance again behind magnetic field, its area of hysteresis loop is little and narrow, goes back
Have the advantages that resistivity is high, eddy-current loss is little, saturation magnetic strength is high, is widely used in the fields such as power industry, electronics industry
In.
Further illustrating as the present invention, two pieces of " E " shape iron cores splice relatively, and it is exhausted to be provided with " returning " shape in stitching portion
Embolium, the shapes and sizes of insulating trip intermediate openings are mutually matched with the coil rack being wound with coil windings, and coil rack runs through
Insulating trip；Protuberance in the middle part of two pieces of iron cores completely attaches to, and upper and lower two pairs of lobe are completely separated by insulating trip.
Coil rack is provided with the coil support portion of different radii, is wherein located at centre and radius maximum coil supporting part is high pressure
Coil support portion, for supporting high-tension coil winding, side is additionally provided with one or more low-voltage coil supporting parts, and different coils prop up
The radius of support part successively decreases to both sides from the middle of coil rack.
Described arm-tie is either vertically or horizontally anchored on stainless steel strut, arm-tie be by two or more pieces of "【" shape
Sub- arm-tie combines, and the end of every piece of sub- arm-tie is equipped with anchoring screwed hole, and side is provided with splicing screwed hole, sub- arm-tie group
Synthesis arm-tie have one or more shape "【】" dead slot.
Described arm-tie is no excitation arm-tie, is all filled with 3M resin glue at the gap between the screwed hole of arm-tie and sub- arm-tie.
It is equipped with insulating barrier, block board thickness is that coil windings core is straight between each high-tension coil winding and low-voltage coil winding
3-7 times of footpath, the core surface of coil windings is all covered with dielectric film.
The side of vortex opening is provided with two parallel reinforcing steel bars, and described reinforcing steel bar aluminum suitcase is wrapped up in, two ends and steel plate
Support prism welds.
The invention has the beneficial effects as follows：
1. the iron core of transformator of the present invention is made using magnetically soft alloy, can reduce iron core area of hysteresis loop and coercivity, improves permeability
With magnetic strength degree of saturation, reduce core interior vortex density, thus effectively reducing the eddy-current loss of iron core.
2. it is inlaid with aluminium flake outside the stainless steel strut of transformator of the present invention, the most of magnetic flux overflowing from iron core is shielded in aluminium flake
In the space being surrounded, thus stainless steel strut is served with shielding protection effect, does not produce eddy current effect.
3. transformator of the present invention is provided with vortex in the very strong region stainless steel strut side of leakage field with leakage magnetic flux vertical area and opens
Mouthful, due to not having conductor at this, the magnetic flux of leakage can not produce eddy current effect because of ineffective object.
Brief description
Fig. 1 is the structural representation of transformator of the present invention.
Fig. 2 is the main transformation component structure schematic diagram of transformator.
Fig. 3 is the pulling plate structure schematic diagram of transformator.
Fig. 4 is the vortex opening ruggedized construction schematic diagram of transformator.
In figure, 1 stainless steel strut；2 aluminium flakes；3 iron cores；4 insulating trips；5 coil windings；501 high-voltage lines
Circle winding；502 low-voltage coil windings；6 insulating barriers；7 vortex openings；8 arm-ties；801 anchoring screwed holes；802
Splicing screwed hole；803 dead slots；9 coil racks；901 low-voltage coil supporting parts；902 high-tension coil supporting parts；
10 reinforcing steel bars.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, the present embodiment is only that the present invention is become apparent from
Explanation, rather than limitation of the present invention.
As shown in figure 1, the vortex transformator that disappears of the present invention, including the coil rack 9 being wound with coil windings 5 and insertion line
The iron core 3 of ring framework, also includes the stainless steel strut 1 for installing and supporting all transformation elements, and described iron core 3 passes through arm-tie 8
It is horizontally fixed in stainless steel strut 1, iron core is " E " the shape iron core made using magnetically soft alloy, can reduce iron core magnetic hysteresis
Line area and coercivity, improve permeability and magnetic strength degree of saturation, reduce core interior vortex density, thus effectively reducing
The eddy-current loss of iron core.
Coil rack 9 axial portions are hollow, protuberance insertion coil bone 9 hollow part at iron core 3 middle part, stainless steel strut
Outside is inlaid with aluminium flake 2, and the most of magnetic flux overflowing from iron core is shielded in the space that aluminium flake is surrounded, thus to steel plate
Support serves shielding protection effect.
Stainless steel strut side and leakage magnetic flux vertical area are provided with vortex opening 7, even if there being magnetic flux to expose, but do not lead at this
Body, can not produce eddy current effect because of the ineffective object of magnetic flux.
Further illustrating as the present embodiment, as shown in figure 1, two pieces of " E " shape iron cores 3 splice relatively, and in splicing
Place is provided with " returning " shape insulating trip 4, the shapes and sizes of insulating trip intermediate openings and the coil rack 9 being wound with coil windings 5
It is mutually matched, coil rack runs through insulating trip；Protuberance in the middle part of two pieces of iron cores completely attaches to, and upper and lower two pairs of lobe are insulated
Piece is completely separated.So most of magnetic flux can be limited in iron core, reduce magnetic flux and reveal.
Further illustrating as the present embodiment, as shown in Fig. 2 coil rack 9 is provided with the coil support portion of different radii,
Wherein it is located at centre and radius maximum coil supporting part is that high-tension coil supporting part 902 is used for supporting high-tension coil winding, side is also
It is provided with one or more low-voltage coil supporting parts 901, the radius of different coil support portion successively decreases to both sides from the middle of coil rack.
Thus symmetrically it is divided into multigroup using alternating expression winding, leakage field group, magnetic leakage flux significantly reduces, electromagnetic force reduces.Greatly
Improve anti-short circuit capability.
Further illustrating as the present embodiment, as shown in figure 3, arm-tie 8 is either vertically or horizontally anchored at stainless steel strut 1
On, arm-tie be by two or more pieces of "【" shape sub- arm-tie combination, the end of every piece of sub- arm-tie is equipped with anchoring screw thread
Hole 801, side be provided with splicing screwed hole 802, the arm-tie that sub- arm-tie is combined into have one or more "【】" shape dead slot 803.
“【】" shape dead slot functionally can be used as demagnetization groove, a large amount of vortex concentration reducing within arm-ties are it is not necessary to process centre
Groove, decreases machining period.When can greatly save milling cutter consumption, reduces cost, and avoid arm-tie due to milling groove
Be heated moderate finite deformation that is uneven and leading to.The pulling plate structure of the present invention is essentially identical with traditional structure, being capable of the lifting of receiver body
When untanking mass and winding thrust, meet the requirement of mechanical strength.
Further illustrating as the present embodiment, as shown in figure 3, arm-tie 8 is no excitation arm-tie, the screwed hole 802 of arm-tie
All it is filled with 3M resin glue at gap and between sub- arm-tie.
Further illustrating as the present embodiment, as shown in Fig. 2 each high-tension coil winding 501 and low-voltage coil winding 502
Between be equipped with insulating barrier 6, block board thickness is 3-7 times of coil windings wire core diameter, and the core surface of coil windings all covers
There is dielectric film.
Further illustrating as the present embodiment, as shown in figure 4, the side of vortex opening is provided with two parallel reinforcing steel
Bar 10, reinforces steel bar aluminum suitcase and wraps up in, two ends are welded with stainless steel strut prism, strengthen the structural stability of transformator further,
Meet the requirement of mechanical strength.
Claims (5)
1. one kind can soft magnetic alloy iron core transformer capable of removing eddy current, including the coil rack (9) being wound with coil windings (5) and insertion line
The iron core (3) of ring framework, also include for install and support all transformation elements stainless steel strut (1) it is characterised in that：Described
Iron core (3) is " E " the shape iron core made using magnetically soft alloy, and it is vertically or horizontally fixed on steel by arm-tie (8)
In board mount (1)；Described coil rack (9) axial portions are hollow, in protuberance insertion coil rack (9) in the middle part of iron core (3)
Empty position；It is inlaid with aluminium flake (2), side and leakage magnetic flux vertical area are provided with vortex opening outside described stainless steel strut (1)
(7)；Wherein, two pieces of " E " shape iron cores (3) are spliced relatively, and are provided with " returning " shape insulating trip (4) in stitching portion, absolutely
The shapes and sizes of embolium intermediate openings are mutually matched with the coil rack (9) being wound with coil windings (5), coil rack
Run through insulating trip；Protuberance in the middle part of described two pieces of iron cores completely attaches to, and upper and lower two pairs of lobe are completely separated by insulating trip.
2. transformator according to claim 1 it is characterised in that：Described coil rack (9) is provided with the line of different radii
Circle supporting part, is wherein located at centre and radius maximum coil supporting part is high-tension coil supporting part (902), side is additionally provided with one
Individual or multiple low-voltage coil supporting parts (901), the radius of different coil support portion successively decreases to both sides from the middle of coil rack.
3. transformator according to claim 1 it is characterised in that：Described arm-tie (8) is either vertically or horizontally anchored at
On stainless steel strut (1), arm-tie be by two or more pieces of "【" the sub- arm-tie of shape combines, the end of every piece of sub- arm-tie
It is equipped with anchoring screwed hole (801), side is provided with splicing screwed hole (802), and the arm-tie that sub- arm-tie is combined into has one at head
Or multiple "【】" shape dead slot (803).
4. transformator according to claim 3 it is characterised in that：Described arm-tie (8) is no excitation arm-tie, arm-tie
All it is filled with 3M resin glue at gap between screwed hole (802) and sub- arm-tie.
5. transformator according to claim 1 it is characterised in that：Each high-tension coil winding (501) and low-voltage coil around
It is equipped with insulating barrier (6), block board thickness is 3-7 times of coil windings wire core diameter, coil windings between group (502)
Core surface is all covered with dielectric film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641257.0A CN103680842B (en) | 2013-12-03 | 2013-12-03 | Soft magnetic alloy iron core transformer capable of removing eddy current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641257.0A CN103680842B (en) | 2013-12-03 | 2013-12-03 | Soft magnetic alloy iron core transformer capable of removing eddy current |
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| Publication Number | Publication Date |
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| CN103680842A CN103680842A (en) | 2014-03-26 |
| CN103680842B true CN103680842B (en) | 2017-02-08 |
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| CN201310641257.0A Active CN103680842B (en) | 2013-12-03 | 2013-12-03 | Soft magnetic alloy iron core transformer capable of removing eddy current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109888937B (en) * | 2019-04-29 | 2023-11-07 | 曹颂 | Integrated soft magnetic alloy structure with low-frequency magnetic conduction |
| CN115691983B (en) * | 2022-12-29 | 2023-05-16 | 清华大学 | Magnetic leakage shielding device and method for iron core |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3828985C1 (en) * | 1988-08-26 | 1989-09-14 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Hollaend. Stiftung & Co Kg, 8510 Fuerth, De | |
| CN202049854U (en) * | 2011-04-28 | 2011-11-23 | 南京国电环保设备有限公司 | High-power high-frequency high-tension rectifier transformer |
| CN202434311U (en) * | 2011-12-27 | 2012-09-12 | 山东派力迪环保工程有限公司 | Eddy-eliminating small high-voltage transformer |
| CN202632943U (en) * | 2012-04-16 | 2012-12-26 | 湖南湘能变压器有限责任公司 | Ventilated transformer shell |
| CN202977127U (en) * | 2012-11-14 | 2013-06-05 | 海宁联丰东进电子有限公司 | LED TV (Light Emitting Diode Television) transformer capable of reducing eddy current loss |
| CN103377800A (en) * | 2012-04-14 | 2013-10-30 | 扬州丰登精密机械有限公司 | Heat-dissipating transformer |
-
2013
- 2013-12-03 CN CN201310641257.0A patent/CN103680842B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3828985C1 (en) * | 1988-08-26 | 1989-09-14 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Hollaend. Stiftung & Co Kg, 8510 Fuerth, De | |
| CN202049854U (en) * | 2011-04-28 | 2011-11-23 | 南京国电环保设备有限公司 | High-power high-frequency high-tension rectifier transformer |
| CN202434311U (en) * | 2011-12-27 | 2012-09-12 | 山东派力迪环保工程有限公司 | Eddy-eliminating small high-voltage transformer |
| CN103377800A (en) * | 2012-04-14 | 2013-10-30 | 扬州丰登精密机械有限公司 | Heat-dissipating transformer |
| CN202632943U (en) * | 2012-04-16 | 2012-12-26 | 湖南湘能变压器有限责任公司 | Ventilated transformer shell |
| CN202977127U (en) * | 2012-11-14 | 2013-06-05 | 海宁联丰东进电子有限公司 | LED TV (Light Emitting Diode Television) transformer capable of reducing eddy current loss |
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| CN103680842A (en) | 2014-03-26 |
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Effective date of registration: 20160826 Address after: Garden City District of Liuzhou City, 545006 New Road No. 7 the Guangxi Zhuang Autonomous Region Guangxi No. 21 1-9 Applicant after: Li Chao Address before: Garden City District of Liuzhou City, 545006 New Road No. 7 the Guangxi Zhuang Autonomous Region Guangxi No. 21 1-9 Applicant before: LIUZHOU WUHUAN WATER HEATING EQUIPMENT BUSINESS DEPARTMENT |
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Effective date of registration: 20160922 Address after: 528325 Guangdong City, Foshan Province, the town of Shunde District, the town of Jane Jane Industrial Zone, No. 3, No. 3 Applicant after: Shunde City, Foshan Wan Xin electronic and Electrical Appliance Co., Ltd. Address before: Garden City District of Liuzhou City, 545006 New Road No. 7 the Guangxi Zhuang Autonomous Region Guangxi No. 21 1-9 Applicant before: Li Chao |
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