CN203645634U - External front filter of household electrical appliance - Google Patents
External front filter of household electrical appliance Download PDFInfo
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- CN203645634U CN203645634U CN201320893184.XU CN201320893184U CN203645634U CN 203645634 U CN203645634 U CN 203645634U CN 201320893184 U CN201320893184 U CN 201320893184U CN 203645634 U CN203645634 U CN 203645634U
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- capacitor
- household electrical
- electrical appliance
- voltage pulse
- pulse absorption
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- 239000003990 capacitor Substances 0.000 claims abstract description 73
- 238000010521 absorption reaction Methods 0.000 claims abstract description 42
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 18
- 238000013461 design Methods 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses an external front filter of a household electrical appliance. The filter comprises a discharge resistor (R), common-mode choke coils (Lf1 and Lf2), X capacitors (C1, C2, C3 and C4), differential-mode inductors (L1 and L2), and high-voltage pulse absorption capacitors (C5, C6, C7 and C8), wherein the discharge resistor (R) and the X capacitors (C1, C2, C3 and C4) are successively connected in parallel between a zero line and a live line, two coils of the common-mode choke coil (Lf1) are respectively connected in series with the zero line and the live line between the capacitor (C1) and the capacitor (C2), two coils of the common-mode choke coil (Lf2) are respectively connected in series with the zero line and the live line between the capacitor (C2) and the capacitor (C3), the differential-mode inductors (L1 and L2) are respectively connected in series with the zero line and the live line between the X capacitor (C3) and the X capacitor (C4), the high-voltage pulse absorption capacitors (C5 and C6) are connected in series, and the high-voltage pulse absorption capacitors (C7 and C8) are connected in series. The external front filter can inhibit EMI interference signals which are transmitted from the household electrical appliance to the electrical network, prevent loss of power line carrier signals in the household electrical appliance, and improve the density of power spectrum of the power modem.
Description
Technical field
The utility model relates to power-line carrier communication field, especially relates to a kind of household electrical appliance outer front end filter.
Background technology
Homeplug be otherwise known as PLC(Power Line Communication, PLC).PLC industry has developed for many years abroad, developed countries has become basically universal and has used power carrier equipment (i.e. " Homeplug ") now, domestic really PLC technology is applied to come from 2008 on civilian before and after, domestic network operator was the digital Network Television (IPTV) of meeting the Olympic Games to release at that time, for the development of power carrier equipment provides growth hotbed, popularizing along with family broadband after 2010, the application of network is also more and more, and domestic PLC manufacturer is also as emerged rapidly in large numbersBamboo shoots after a spring rain development.
The difficult problem that Homeplug faces in application process is: Homeplug communication signal strength (power spectral density), along with the use of the serious household electrical appliance of electromagnetic interference can die down, makes communication not smooth, in serious situation, can interrupt.Household electrical appliance tendency is powered with high frequency switch power at present, as: notebook computer, desktop computer, LED television set, air-conditioning, LED light fixture etc., these household electrical appliance are owing to using HF switch technology, its electromagnetic interference (Electro Magnetic Interference, EMI) problem is more serious, although device interior Front-end Design has electromagnetic interface filter, but this design of filter is generally within 30MHz, exceed 30MHz and have larger differential mode, common-mode noise is conducted into power grid environment, the EMI signal of these hyperfrequencies can make Homeplug signal strength signal intensity reduce, be that power spectral density dies down, make ethernet communication slack-off, even interrupt.The impact of high power switching power supply electric equipment products is particularly serious, in order to guarantee the power spectral density of Homeplug signal of communication, is necessary to design the filter that a kind of household electrical appliance outer front end is connected with power line, for improving the general density of power of Homeplug.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of household electrical appliance outer front end filter is provided, it is simple in structure, reasonable in design, use simple operation, can suppress the EMI interference signal that household electrical appliance are conducted into electrical network, also stop that the power line carrier loss of signal is in household electrical appliance, guaranteed fluency and the stability of Homeplug signal of communication simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of household electrical appliance outer front end filter, is characterized in that: comprise bleeder resistance R, common mode choke L
f1and L
f2, X capacitor C
1, C
2, C
3and C
4, differential mode inductance L
1and L
2, and high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8; Described common mode choke L
f1and L
f2all there is toroidal core and be wound on two coils on described toroidal core, described bleeder resistance R, X capacitor C
1, X capacitor C
2, X capacitor C
3with X capacitor C
4be connected in parallel on successively between the zero line L and live wire N of power input line described common mode choke L
f1two coils be connected on respectively described X capacitor C
1with X capacitor C
2between zero line L and live wire N upper, described common mode choke L
f2two coils be connected on respectively described X capacitor C
2with X capacitor C
3between zero line L and live wire N upper, described differential mode inductance L
1be connected on described X capacitor C
3with X capacitor C
4between zero line L upper, described differential mode inductance L
2be connected on described X capacitor C
3with X capacitor C
4between live wire N upper, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6one end after series connection and described X capacitor C
2one end join, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6the other end after series connection and described X capacitor C
4one end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8one end after series connection and described X capacitor C
2the other end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8the other end after series connection and described X capacitor C
4the other end join.
Above-mentioned a kind of household electrical appliance outer front end filter, is characterized in that: the resistance of described bleeder resistance R is 1M Ω～4M Ω, and power is 1W～5W.
Above-mentioned a kind of household electrical appliance outer front end filter, it is characterized in that: described toroidal core is the nickel-zinc ferrite magnet ring magnetic core of the annular be made up of nickel-zinc-ferrite material, be wound on the number of turn of two coils on described toroidal core identical and around on the contrary.
Above-mentioned a kind of household electrical appliance outer front end filter, is characterized in that: the operating frequency of described nickel-zinc ferrite magnet ring magnetic core is 230KHz～100MHz, the inductance value of described nickel-zinc ferrite magnet ring magnetic core is 3mH～6mH.
Above-mentioned a kind of household electrical appliance outer front end filter, is characterized in that: described X capacitor C
1, C
2, C
3and C
4be paster safety electric capacity.
Above-mentioned a kind of household electrical appliance outer front end filter, is characterized in that: described differential mode inductance L
1and L
2for the differential mode inductance of being made up of high frequency bar magnet, the operating frequency of described high frequency bar magnet is 1MHz～90MH
z.
Above-mentioned a kind of household electrical appliance outer front end filter, is characterized in that: described high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8be the plug-in unit high pressure ceramic disc capacitor of resistance to 2KV～10KV high pressure.
The utility model compared with prior art has the following advantages:
1, the utility model circuit structure is simple, reasonable in design, easy-to-connect.
2, the front end that the utility model is connected with power line at each household electrical appliance easy to connect, once mounting, can be used for a long time, uses simple operation.
3, when the utility model uses, be arranged on the front end that each household electrical appliance are connected with power line, can suppress the EMI interference signal that household electrical appliance are conducted into electrical network, also stopped that the power line carrier loss of signal is in household electrical appliance simultaneously, the weakening problem of the EMI interference signal that has solved household electrical appliance to Homeplug signal of communication power spectral density, has guaranteed fluency and the stability of Homeplug signal of communication.
4, functional reliability of the present utility model and stability are high, practical, and result of use is good, are convenient to promote the use of.
In sum, the utility model is simple in structure, reasonable in design, use simple operation, can suppress the EMI interference signal that household electrical appliance are conducted into electrical network, also stop that the power line carrier loss of signal is in household electrical appliance, guaranteed fluency and the stability of Homeplug signal of communication simultaneously.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the use view of the utility model in power line carrier system.
Description of reference numerals:
1-Internet wide area network; 2-server; The 3-the first Homeplug;
The 4-the second Homeplug; The 5-the three Homeplug; The 6-the four Homeplug;
The 7-the first camera; 8-second camera; 9-refrigerator;
10-microwave oven; 11-electric cooker; 12-washing machine;
13-computer; 14-household electrical appliance outer front end filter.
Embodiment
As shown in Figure 1, the utility model comprises bleeder resistance R, common mode choke L
f1and L
f2, X capacitor C
1, C
2, C
3and C
4, differential mode inductance L
1and L
2, and high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8; Described common mode choke L
f1and L
f2all there is toroidal core and be wound on two coils on described toroidal core, described bleeder resistance R, X capacitor C
1, X capacitor C
2, X capacitor C
3with X capacitor C
4be connected in parallel on successively between the zero line L and live wire N of power input line described common mode choke L
f1two coils be connected on respectively described X capacitor C
1with X capacitor C
2between zero line L and live wire N upper, described common mode choke L
f2two coils be connected on respectively described X capacitor C
2with X capacitor C
3between zero line L and live wire N upper, described differential mode inductance L
1be connected on described X capacitor C
3with X capacitor C
4between zero line L upper, described differential mode inductance L
2be connected on described X capacitor C
3with X capacitor C
4between live wire N upper, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6one end after series connection and described X capacitor C
2one end join, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6the other end after series connection and described X capacitor C
4one end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8one end after series connection and described X capacitor C
2the other end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8the other end after series connection and described X capacitor C
4the other end join.
In the present embodiment, the resistance of described bleeder resistance R is 1M Ω～4M Ω, and power is 1W～5W.The described bleeder resistance R X capacitor C that is used for releasing
1, C
2, C
3and C
4the energy of storing after power down, the power W of described bleeder resistance R
raccording to formula
select, wherein, C
zcapacitance be X capacitor C
1, C
2, C
3and C
4capacitance sum, i.e. C
z=C
1+ C
2+ C
3+ C
4; U
pfor maximum sharpness voltage, conventionally choose according to 2 times of single-phase civil power 220V peak value 311V, get 622V; The resistance of described bleeder resistance R is according to formula
select, wherein, I
pfor impulse current; In this example, the resistance of optimizing the described bleeder resistance R of selection is 1.5M Ω, and power is 2W.
In the present embodiment, described toroidal core is the nickel-zinc ferrite magnet ring magnetic core of the annular be made up of nickel-zinc-ferrite material, is wound on the number of turn of two coils on described toroidal core identical and around on the contrary.The operating frequency of described nickel-zinc ferrite magnet ring magnetic core is 230KHz～100MHz, and the inductance value of described nickel-zinc ferrite magnet ring magnetic core is 3mH～6mH.When concrete enforcement, select the nickel-zinc ferrite magnet ring magnetic core of different volumes according to the power difference of household electrical appliance, power is directly proportional to volume, is internal diameter and external diameter for the nickel-zinc ferrite magnet ring magnetic core main manifestations of annular; For example will realize power is the household electrical appliance outer front end filter of 2KW, and can select internal diameter is the nickel-zinc ferrite magnet ring magnetic core that 45mm, external diameter are 48mm.
In the present embodiment, described X capacitor C
1, C
2, C
3and C
4be paster safety electric capacity.Described X capacitor C
1, C
2, C
3and C
4be used for eliminating differential mode interference, while specifically enforcement, described X capacitor C
1, C
2, C
3and C
4capacitance be 0.40uF, described X capacitor C
1, C
2, C
3and C
4rated voltage be 400V.
In the present embodiment, described differential mode inductance L
1and L
2for the differential mode inductance of being made up of high frequency bar magnet, the operating frequency of described high frequency bar magnet is 1MHz～90MHz.When concrete enforcement, the diameter of described high frequency bar magnet is by the power decision of household electrical appliance, diameter is directly proportional to frequency, power is 2KW take the diameter of the interior optional high frequency bar magnet of general household electrical appliance as 4mm, power is that the diameter of the optional high frequency bar magnet of the household electrical appliance of 2KW～10KW is 6.5mm, power is that the diameter of the optional high frequency bar magnet of the household electrical appliance of 10KW～30KW is 8mm, and power is that the diameter of the optional high frequency bar magnet of household electrical appliance more than 30KW is 10mm; The interference spectrum characteristic that the length of described high frequency bar magnet is produced by household electrical appliance determines, be 10mm～50mm for the length of the optional high frequency bar magnet of conventional household electrical appliance, in the time that household electrical appliance adopt high frequency switch power power supply, the length of optional high frequency bar magnet is 50mm, in the time that household electrical appliance adopt general Switching Power Supply power supply, the length of optional high frequency bar magnet is 30mm, in the time that household electrical appliance adopt linear power supply power supply, the length of optional high frequency bar magnet is 10mm, and inductance value is 6uH～10uH.
In the present embodiment, described high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8be the plug-in unit high pressure ceramic disc capacitor of resistance to 2KV～10KV high pressure.When concrete enforcement, described high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8capacitance be 390
pf.
The utility model high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6after series connection, be common mode choke L
f2coil and differential mode inductance L
1provide a bypass, high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8after series connection, be another coil and the differential mode inductance L of common mode choke
2a bypass is provided, and making can not be by common mode choke L in household electrical appliance
f1and L
f2and differential mode inductance L
1and L
2the interference consuming, switches to high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6series arm and high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8series arm in be absorbed formula suppress; The utility model has adopted the common mode choke L of nickel-zinc ferrite magnet ring magnetic core
f1and L
f2, the common mode disturbances between the 230kHz～100MHz can filtering household electrical appliance producing; Due to common mode choke L
f1and L
f2toroidal core adopted the nickel-zinc ferrite magnet ring magnetic core of annular, operating frequency is 230KHz～100MHz, common mode interference signal that can be more than filtering 30MHz; The utility model differential mode inductance L
1and L
2adopt the differential mode inductance made by high frequency bar magnet, differential mode interference signal that can be more than filtering 30M; Based on above three kinds of measures, make the high-frequency electromagnetic interference that household electrical appliance produce be unlikely to affect the transmission of Homeplug, thereby improved the power spectral density of Homeplug, strengthen the transmission signal strength of Homeplug.
The use view of household electrical appliance outer front end filter 14 described in the utility model in power line carrier system as shown in Figure 2, server 2 is connected with Internet wide area network 1, server 2 is connected with the first Homeplug 3 by wide area network, so just can on Internet wide area network 1, access the first camera 7, second camera 8 or computer 13 on the first Homeplug 3 place power lines, the first Homeplug 3 is responsible for the signal loading of Internet wide area network 1 on the zero line L and live wire N of power line, is also responsible for the signal demodulator on the zero line L of power line and live wire N out to send wide area network, the second Homeplug 4 is for the communication of the first camera 7, and the 3rd Homeplug 5 is for the communication of second camera 8, and the 4th Homeplug 6 is for the transmission of the network signal of computer 13, household electrical appliance outer front end filter 14 described in the utility model is carried in respectively refrigerator 9, microwave oven 10, electric cooker 11, the front end that washing machine 12 household electrical appliances such as grade are connected with live wire N with the zero line L of power line, the first Homeplug 3 and the second Homeplug 4, between the first Homeplug 3 and the 3rd Homeplug 5 and the first Homeplug 3 and the 4th Homeplug 6, need communication, the second Homeplug 4, the 3rd Homeplug 5 and the 4th Homeplug 6 also need communication between any two, these information are all the carrier signals on zero line L and the live wire N based on power line, conventionally household electrical appliance are in accepting power supply, also can send EMI interference signal to the zero line L of power line and live wire N, signal seriously can cause between each Homeplug communication not smooth, even make its communication thoroughly block, household electrical appliance outer front end filter 14 described in the utility model is exactly that the EMI interference that each household electrical appliance are sent effectively terminates in outside the zero line L and live wire N of power line, stop that power line carrier signal on zero line L and the live wire N of power line is transferred in household electrical appliance goes simultaneously, EMI the interference signal more than 30M producing mainly for Switching Power Supply is carried out filtering, also the signal below 30M is played to effective secondary extinction effect simultaneously, the weakening problem of the EMI interference signal that has solved household electrical appliance to Homeplug signal of communication power spectral density, improve the general density of Homeplug power, fluency and the stability of Homeplug signal of communication are guaranteed.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection range of technical solutions of the utility model.
Claims (7)
1. a household electrical appliance outer front end filter, is characterized in that: comprise bleeder resistance R, common mode choke L
f1and L
f2, X capacitor C
1, C
2, C
3and C
4, differential mode inductance L
1and L
2, and high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8; Described common mode choke L
f1and L
f2all there is toroidal core and be wound on two coils on described toroidal core, described bleeder resistance R, X capacitor C
1, X capacitor C
2, X capacitor C
3with X capacitor C
4be connected in parallel on successively between the zero line L and live wire N of power input line described common mode choke L
f1two coils be connected on respectively described X capacitor C
1with X capacitor C
2between zero line L and live wire N upper, described common mode choke L
f2two coils be connected on respectively described X capacitor C
2with X capacitor C
3between zero line L and live wire N upper, described differential mode inductance L
1be connected on described X capacitor C
3with X capacitor C
4between zero line L upper, described differential mode inductance L
2be connected on described X capacitor C
3with X capacitor C
4between live wire N upper, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6one end after series connection and described X capacitor C
2one end join, described high-voltage pulse Absorption Capacitance C
5with high-voltage pulse Absorption Capacitance C
6the other end after series connection and described X capacitor C
4one end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8one end after series connection and described X capacitor C
2the other end join, described high-voltage pulse Absorption Capacitance C
7with high-voltage pulse Absorption Capacitance C
8the other end after series connection and described X capacitor C
4the other end join.
2. according to a kind of household electrical appliance outer front end filter claimed in claim 1, it is characterized in that: the resistance of described bleeder resistance R is 1M Ω～4M Ω, and power is 1W～5W.
3. according to a kind of household electrical appliance outer front end filter claimed in claim 1, it is characterized in that: described toroidal core is the nickel-zinc ferrite magnet ring magnetic core of the annular be made up of nickel-zinc-ferrite material, be wound on the number of turn of two coils on described toroidal core identical and around on the contrary.
4. according to a kind of household electrical appliance outer front end filter claimed in claim 3, it is characterized in that: the operating frequency of described nickel-zinc ferrite magnet ring magnetic core is 230KHz～100MHz, the inductance value of described nickel-zinc ferrite magnet ring magnetic core is 3mH～6mH.
5. according to a kind of household electrical appliance outer front end filter claimed in claim 1, it is characterized in that: described X capacitor C
1, C
2, C
3and C
4be paster safety electric capacity.
6. according to a kind of household electrical appliance outer front end filter claimed in claim 1, it is characterized in that: described differential mode inductance L
1and L
2for the differential mode inductance of being made up of high frequency bar magnet, the operating frequency of described high frequency bar magnet is 1MHz～90MHz.
7. according to a kind of household electrical appliance outer front end filter claimed in claim 1, it is characterized in that: described high-voltage pulse Absorption Capacitance C
5, C
6, C
7and C
8be the plug-in unit high pressure ceramic disc capacitor of resistance to 2KV～10KV high pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320893184.XU CN203645634U (en) | 2013-12-31 | 2013-12-31 | External front filter of household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320893184.XU CN203645634U (en) | 2013-12-31 | 2013-12-31 | External front filter of household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645634U true CN203645634U (en) | 2014-06-11 |
Family
ID=50876852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320893184.XU Expired - Lifetime CN203645634U (en) | 2013-12-31 | 2013-12-31 | External front filter of household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203645634U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140313795A1 (en) * | 2013-04-17 | 2014-10-23 | The Regents Of The University Of Michigan | Single phase bi-directional ac-dc converter with reduced passive components size and common mode electro-magnetic interference |
| CN108604889A (en) * | 2016-02-05 | 2018-09-28 | 阿莫泰克有限公司 | Differential mode and common mode dual-purpose filter |
| CN109962695A (en) * | 2017-12-22 | 2019-07-02 | 爱思电视品牌公司 | The high-voltage pulse generator of Alternating Current Power Supply |
-
2013
- 2013-12-31 CN CN201320893184.XU patent/CN203645634U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140313795A1 (en) * | 2013-04-17 | 2014-10-23 | The Regents Of The University Of Michigan | Single phase bi-directional ac-dc converter with reduced passive components size and common mode electro-magnetic interference |
| US9559581B2 (en) * | 2013-04-17 | 2017-01-31 | The Regents Of The University Of Michigan | Single phase bi-directional AC-DC converter with reduced passive components size and common mode electro-magnetic interference |
| CN108604889A (en) * | 2016-02-05 | 2018-09-28 | 阿莫泰克有限公司 | Differential mode and common mode dual-purpose filter |
| CN109962695A (en) * | 2017-12-22 | 2019-07-02 | 爱思电视品牌公司 | The high-voltage pulse generator of Alternating Current Power Supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190624 Address after: 710075 Room 03, 8th Floor, Tongda International Building, 41 Tangyan Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: Shaanxi Yi Xin Technology Development Co.,Ltd. Address before: 710054 Room 1215, Xi'an Foreign Trade Building, 68 Central Huancheng South Road, Xi'an City, Shaanxi Province Co-patentee before: Ji Junpeng Patentee before: Kang Haifeng |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |