CN110034665B - Combined high-capacity incoming line braking unit structure based on crimping IEGT - Google Patents
Combined high-capacity incoming line braking unit structure based on crimping IEGT Download PDFInfo
- Publication number
- CN110034665B CN110034665B CN201910393922.6A CN201910393922A CN110034665B CN 110034665 B CN110034665 B CN 110034665B CN 201910393922 A CN201910393922 A CN 201910393922A CN 110034665 B CN110034665 B CN 110034665B
- Authority
- CN
- China
- Prior art keywords
- unit
- brake unit
- valve string
- incoming line
- crimping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002788 crimping Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000002955 isolation Methods 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20872—Liquid coolant without phase change
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a combined high-capacity inlet wire brake unit structure based on a crimping IEGT, which combines an inlet wire unit and a brake unit into a unit structure, and comprises a control part, a valve string part, an RC absorption circuit part and a water cooling pipeline; the control part, the valve string part and the RC absorption circuit part are sequentially arranged from front to back, and the water cooling pipeline dissipates heat for the control part, the valve string part and the RC absorption circuit part; the valve string part integrates power devices of the wire inlet unit and the brake unit and is of a crimping type IEGT valve string structure; the water cooling pipeline is integrated with a water separator, a resistance radiator and a unit pipeline quick connector, and the resistance radiator is used for radiating heat of the bus equalizing resistor; the resistor radiator is connected with the unit pipeline quick connector and the water separator. The invention combines the wire inlet unit and the brake unit into a whole structure, which is beneficial to modularization of product production and field maintenance; the overall structure is high in stability and easy to maintain.
Description
Technical Field
The invention belongs to an IEGT unit structure, and particularly relates to a combined high-capacity incoming line brake unit structure based on a crimping type IEGT.
Background
The wire inlet unit is a core component on a bus of the frequency converter and mainly used for stopping reverse current from the frequency converter so as to prevent other load side voltages from being raised, and the internal structure of the wire inlet unit mainly comprises a cut-off diode with an RC absorption circuit and arranged on a main loop; the brake unit is an important part for protecting other parts in the main loop of the frequency converter, and mainly reduces the bus voltage of the frequency converter by controlling an IGBT switch so as to realize the protection function of the frequency converter, and mainly comprises an IGBT (integrated anti-parallel diode) and a diode connected in series with the IGBT. For a high-power three-level frequency converter device, the wire inlet unit has the characteristics of large current flowing through a cut-off diode, high cut-off voltage, scattered installation, large heating value, difficulty in arranging a water pipe and the like; the braking unit has the characteristics of double number of power devices, large size of absorption capacitor, difficult structural layout and the like. The factors lead to that the size of the existing wire inlet unit and the brake unit is large, the integration level is low, the replacement and the maintenance cannot be performed quickly and efficiently, the places with small maintenance space and modularized replacement and maintenance requirements such as a traction locomotive cannot be met, and therefore a reliable product with high power density and integrating the two functions of the wire inlet unit and the brake unit is urgently needed in the market.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a combined high-capacity incoming line brake unit structure based on a crimping IEGT, which integrates an incoming line unit and a brake unit into a whole for design so as to realize the integrity, the structural simplicity, the compactness and the usability of the unit structure.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the combined high-capacity inlet wire brake unit structure based on the crimping IEGT combines the inlet wire unit and the brake unit into a unit structure, and comprises a control part, a valve string part, an RC absorption circuit part and a water cooling pipeline;
the control part, the valve string part and the RC absorption circuit part are sequentially arranged from front to back, and the water cooling pipeline dissipates heat by the control part, the valve string part and the RC absorption circuit part;
the valve string part integrates power devices of the wire inlet unit and the brake unit and is of a crimping type IEGT valve string structure;
the water cooling pipeline is integrated with a water separator, a resistance radiator and a unit pipeline quick connector, and the resistance radiator is used for radiating heat of the bus equalizing resistor; the resistor radiator is connected with the unit pipeline quick connector and the water separator, and the unit pipeline quick connector is used for connecting a water inlet and outlet channel.
The valve string part is provided with a valve string and a copper bar connected with the valve string in a pressing mode, and the valve string is provided with all power devices of the incoming line braking unit in a pressing mode; the connecting copper bar is a connecting copper bar of the wire inlet unit and the brake unit.
The RC absorption circuit part comprises a connecting row, a fixed frame and an RC absorption circuit connected with two ends of a cut-off diode of the wire inlet unit, and a capacitor and a resistor are fixed on the connecting row with potential.
The unit pipeline quick connector and the resistance radiator are of an integrated structure, and the water separator and the resistance radiator are connected through a flange and sealed in an end face sealing mode.
The control part comprises a driving board card, a wire inlet braking unit control box, a temperature detection box and two isolation plates, wherein the driving board card and the temperature control box are fixed between the two isolation plates, the wire inlet braking unit control box is arranged at the front end of the control part, the wire inlet braking unit control box is arranged on one side of the two isolation plates, and a valve string part is arranged on the other side of the two isolation plates.
The incoming line braking unit structure is in sliding connection with the unit guide rail, and the whole incoming line braking unit structure is pulled out from the front along the unit guide rail.
The valve string part is connected with a water-cooling radiator.
Compared with the prior art, the invention has the beneficial effects that:
the invention combines the wire inlet unit and the brake unit into a whole structure, which is beneficial to modularization and field maintenance of product production; the overall structure is high in stability and easy to maintain.
The valve string part integrates all power devices of the wire inlet unit and the brake unit, adopts a crimping type IEGT valve string structure, has the characteristics of centralized layout, high power density and stable structure, and is beneficial to reducing the number of radiators and reducing the layout difficulty of heat dissipation water pipes.
The water-cooling pipeline part integrates the water separator, the resistor radiator and the waterway quick connector, so that the whole unit layout is more reasonable and compact, the leakage points of the waterway are reduced, the water-cooling pipeline part is safer and more reliable, the pipeline layout is simplified, and the radiator which is independently used for radiating the resistor is omitted. The integrated structure of the quick connector and the resistance radiator saves space, reduces the risk of water leakage, and ensures that the direction of the water tap can be adjusted at will by adopting a flange type (fixed flange or movable flange) connection mode between the water distributor and the resistance radiator, and the sealing among different materials is reliable.
The control part is centralized in layout, and the isolation board is utilized to isolate the primary loop in space, so that the whole incoming line braking unit has good electromagnetic compatibility.
The RC absorption circuit part is positioned at the rear side of the valve string and is close to the valve string, so that stray inductance of the RC loop can be effectively reduced; the capacitor and the resistor are directly fixed on the connection row with a certain potential, and the unit structure is greatly simplified on the basis of ensuring the electrical insulation.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the structure of the valve train portion and the control portion.
Fig. 3 is a schematic diagram of the structure of the RC snubber circuit portion.
FIG. 4 is a schematic view of a part of the structure of a water cooling pipeline.
Fig. 5 is a schematic view of the external structure of the present invention.
In the figure: 001-valve string part 002-RC absorption circuit part 003-water cooling pipeline 004-control part
005-unit frame 006-automatic positioning structure 007-unit guide rail 008-bolt 101-valve string 102-connection copper bar 104-driving board card 105-temperature control box 106-incoming brake unit control box 107-isolation board 108-protection board 201-fixed frame 202-connection row 203-capacitance and resistance 301-unit pipeline quick connector 302-resistance radiator 303-water separator pipeline 304-bus equalizing resistance 305-sealing ring.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification, but it should be noted that the practice of the present invention is not limited to the following embodiments.
Referring to fig. 1 and 5, the combined high-capacity inlet wire brake unit structure based on the crimping IEGT combines the inlet wire unit and the brake unit into a unit structure, and comprises a control part 004, a valve string part 001, an RC absorption circuit part 002 and a water cooling pipeline 003; the control part 004, the valve string part 001 and the RC absorption circuit part 002 are sequentially arranged from front to back, and the water cooling pipeline 003 is used for radiating heat from the three parts of the control part 004, the valve string part 001 and the RC absorption circuit part 002; the four parts are fixed on the unit frame 005, and the automatic positioning structure 006 is fixed below the rear of the unit frame 005, and the automatic positioning structure 006 is used for limiting the position of the incoming line braking unit structure, preventing the rear part of the incoming line braking unit structure from colliding with the parts such as the cabinet body, and playing a role in protecting the incoming line braking unit structure. The automatic positioning structure 006 can be made of alloy materials with Z-shaped structures. A protection plate 108 having a dust-proof isolation function may be provided outside the above four portions.
Referring to fig. 2, a valve string part 001 is installed in the middle of the incoming line brake unit structure and is directly fixed on the unit frame 005, the valve string part 001 integrates power devices of an incoming line unit and a brake unit, and the valve string part 001 is of a crimping type IEGT valve string 101 structure; the valve string part 001 is provided with a valve string 101 in a pressing mode, and a copper bar 102 connected to the valve string 101 through a bolt 008, wherein the valve string 101 is provided with all power devices of a wire inlet brake unit in the pressing mode; the connection copper bar 102 is a connection copper bar 102 of a wire inlet unit and a brake unit. The valve string 101 is connected with a water-cooling radiator. All power devices are pressed in the valve string part 001, so that the layout of the power devices is concentrated, the number of radiators is reduced, the layout difficulty of heat dissipation water pipes is reduced, the unit layout is simplified, and the unit cost is reduced.
Referring to fig. 1 and 4, the water cooling pipeline 003 integrates a water separator, a resistor radiator 302 and a unit pipeline quick connector 301, the resistor radiator 302 is used for radiating heat to a bus equalizing resistor, the resistor radiator 302 is connected with the unit pipeline quick connector 301 and the water separator, and the unit pipeline quick connector 301 is used for connecting a water inlet and outlet pipeline. The unit pipeline quick connector 301 and the resistance radiator 302 are of an integrated structure, and the resistance radiator 302 and the water separator pipeline 303 are connected by adopting flanges; the flange of the water separator pipeline 303 is a fixed flange/movable flange, so that the water gap of the water separator pipeline 303 can be adjusted at will, the water path connection part adopts a sealing ring 305 (such as an O-shaped sealing ring) to seal the end face, and the water separator pipeline has the characteristics of small water leakage risk, adjustable water gap direction and the like. A bus equalizing resistor 304 is mounted on the resistive heat sink 302. The water cooling line 003 also includes a line connected to the water port of the radiator on the valve train 101. The resistor radiator 302 and the bus equalizing resistor 304 are arranged between the two isolation plates 107, and the unit pipeline quick connector 301 can extend out of the front end of the incoming line brake unit structure.
Referring to fig. 1 and 3, the RC snubber circuit 002 is mounted on the rear side of the valve string 001 and is fixed to the unit frame 005, so that the stray inductance of the RC circuit can be effectively reduced. The RC absorption circuit section 002 comprises a connection row 202, a fixed frame 201, and RC absorption circuits connected with both ends of the cut-off diode of the wire inlet unit, and a capacitor and a resistor 203 are fixed on the connection row 202 with a certain potential. The fixing frame 201 is an insulating member, externally connected to the unit frame 005, and internally fixing the connection rows 202, ensuring sufficient electrical insulation performance.
Referring to fig. 1 and 2, the control part 004 is installed at the front of the incoming line brake unit structure, and at the front side of the valve string part 001. The control portion 004 shares the same depth space as the water separator. The control part 004 comprises a driving board card 104, a wire inlet brake unit control box 106, a temperature detection box and two isolation plates 107, wherein the driving board card 104 and the temperature control box 105 are fixed between the two isolation plates 107, the wire inlet brake unit control box 106 is arranged at the front end of the control part 004, the wire inlet brake unit control box 106 is arranged on one side of the two isolation plates 107, and the valve string part 001 is arranged on the other side of the two isolation plates 107. The control portion 004 performs space isolation using the isolation plate 107, and the electromagnetic field intensity of the board area is weak and the electromagnetic compatibility effect is good.
Referring to fig. 1 and 5, the incoming line stopper unit structure is slidably coupled to the unit rail 007, and the incoming line stopper unit structure is integrally drawn out from the front along the unit rail 007. The incoming line brake unit structure is mounted on the unit guide 007 on the cabinet body through the automatic positioning structure 006 and the positioning hole at the front part thereof, and the incoming line brake unit structure can slide in/out of the cabinet body along the unit guide 007. Has the characteristics of high structural stability, easy maintenance and the like.
The invention combines the wire inlet unit and the brake unit into a whole to be designed into the wire inlet brake unit, so that the wire inlet brake unit is integrated, and the modularization of product production and on-site maintenance are facilitated.
Claims (7)
1. The combined high-capacity inlet wire brake unit structure based on the crimping IEGT is characterized in that an inlet wire unit and a brake unit are combined into a unit structure, and the unit structure comprises a control part, a valve string part, an RC absorption circuit part and a water cooling pipeline;
the control part, the valve string part and the RC absorption circuit part are sequentially arranged from front to back, and the water cooling pipeline dissipates heat by the control part, the valve string part and the RC absorption circuit part;
the valve string part integrates power devices of the wire inlet unit and the brake unit and is of a crimping type IEGT valve string structure;
the water cooling pipeline integrates a water separator, a resistor radiator and a unit pipeline quick connector, the resistor radiator is used for radiating heat of the bus equalizing resistor, the resistor radiator is connected with the unit pipeline quick connector and the water separator, and the unit pipeline quick connector is used for connecting a water inlet and outlet pipeline.
2. The combined high-capacity incoming line brake unit structure based on the crimping IEGT according to claim 1, wherein the valve string part is provided with a valve string in a pressing mode and a copper bar connected with the valve string, and the valve string is a valve string of all power devices provided with the incoming line brake unit in a pressing mode; the connecting copper bar is a connecting copper bar of the wire inlet unit and the brake unit.
3. The combined high-capacity incoming line brake unit structure based on the crimping IEGT according to claim 1, wherein the RC absorption circuit part comprises a connecting row, a fixed frame and RC absorption circuits connected with two ends of an incoming line unit cut-off diode, and a capacitor and a resistor are fixed on the connecting row with potential.
4. The combined high-capacity incoming line brake unit structure based on the crimping IEGT is characterized in that the unit pipeline quick connector and the resistance radiator are of an integrated structure, and the water separator is connected with the resistance radiator through a flange and sealed in an end face sealing mode.
5. The combined high-capacity incoming line brake unit structure based on the crimping type IEGT is characterized in that the control part comprises a driving board card, an incoming line brake unit control box, a temperature detection box and two isolation plates, wherein the driving board card and the temperature control box are fixed between the two isolation plates, the incoming line brake unit control box is arranged at the front end of the control part, one side of the two isolation plates is provided with the incoming line brake unit control box, and the other side of the two isolation plates is provided with a valve string part.
6. The combined high-capacity wire-inlet brake unit structure based on the crimping IEGT according to claim 1, wherein the wire-inlet brake unit structure is slidingly connected with the unit guide rail, and the whole wire-inlet brake unit structure is drawn out from the front along the unit guide rail.
7. The combined high-capacity inlet wire brake unit structure based on the crimping IEGT of claim 1, wherein the valve string part is connected with a water cooling radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393922.6A CN110034665B (en) | 2019-05-13 | 2019-05-13 | Combined high-capacity incoming line braking unit structure based on crimping IEGT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393922.6A CN110034665B (en) | 2019-05-13 | 2019-05-13 | Combined high-capacity incoming line braking unit structure based on crimping IEGT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110034665A CN110034665A (en) | 2019-07-19 |
| CN110034665B true CN110034665B (en) | 2023-12-26 |
Family
ID=67242015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910393922.6A Active CN110034665B (en) | 2019-05-13 | 2019-05-13 | Combined high-capacity incoming line braking unit structure based on crimping IEGT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110034665B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115589166B (en) * | 2022-12-01 | 2023-05-16 | 清华大学 | Three-level power module structure based on device straight string |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683857A (en) * | 2013-12-13 | 2014-03-26 | 荣信电力电子股份有限公司 | Direct-current draw-out power supply of IEGT power module |
| CN205639405U (en) * | 2016-04-20 | 2016-10-12 | 丹棱联合机械实业有限公司 | Square electromagnetic braking ware and clutch |
| CN106332500A (en) * | 2016-09-30 | 2017-01-11 | 中国东方电气集团有限公司 | Crimping device based single-phase half-bridge power module |
| CN107070182A (en) * | 2017-04-28 | 2017-08-18 | 荣信汇科电气技术有限责任公司 | A kind of split type double frame construction for high-capacity power unit |
| CN209731049U (en) * | 2019-05-13 | 2019-12-03 | 荣信汇科电气技术有限责任公司 | Combined large capacity inlet wire brake unit structure based on compression joint type IEGT |
-
2019
- 2019-05-13 CN CN201910393922.6A patent/CN110034665B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683857A (en) * | 2013-12-13 | 2014-03-26 | 荣信电力电子股份有限公司 | Direct-current draw-out power supply of IEGT power module |
| CN205639405U (en) * | 2016-04-20 | 2016-10-12 | 丹棱联合机械实业有限公司 | Square electromagnetic braking ware and clutch |
| CN106332500A (en) * | 2016-09-30 | 2017-01-11 | 中国东方电气集团有限公司 | Crimping device based single-phase half-bridge power module |
| CN107070182A (en) * | 2017-04-28 | 2017-08-18 | 荣信汇科电气技术有限责任公司 | A kind of split type double frame construction for high-capacity power unit |
| CN209731049U (en) * | 2019-05-13 | 2019-12-03 | 荣信汇科电气技术有限责任公司 | Combined large capacity inlet wire brake unit structure based on compression joint type IEGT |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110034665A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101222173B (en) | High pressure IGBT current transformer module | |
| CN203827683U (en) | Locally-enhanced heat transfer type high-performance water-cooling plate | |
| WO2016107452A1 (en) | Direct current breaker bridge module | |
| US20130314956A1 (en) | Basic function unit of voltage-source converter based on full-controlled devices | |
| CN103354232B (en) | A kind of submodule in parallel for flexible DC power transmission | |
| CN101976943B (en) | High-power discharge switch gear based on electricity triggered thyristors | |
| CN103227628A (en) | IGBT (Insulated Gate Bipolar Transistor) drive module for electric automobile | |
| CN110034665B (en) | Combined high-capacity incoming line braking unit structure based on crimping IEGT | |
| CN202872614U (en) | High-power water cooling current transformer | |
| CN105071638B (en) | A kind of two electrical level power modules based on IGCT | |
| CN109245556A (en) | A kind of diesel locomotive high-power loop circuit heat pipe power module and its mirror-image structure | |
| CN114006532B (en) | Current transformer | |
| CN102570480B (en) | Evaporating and cooling system of reactive power compensation device | |
| CN207475039U (en) | A kind of good formula safety high-pressure power distribution cabinet of heat dissipation | |
| CN209731049U (en) | Combined large capacity inlet wire brake unit structure based on compression joint type IEGT | |
| CN203279350U (en) | MOSFET power switch modular component | |
| CN103178722A (en) | High-capacity rectifying water-cooling power module | |
| CN103354231A (en) | IGBT power unit and sub-module for VSC-HVDC (voltage source converter high voltage direct current) | |
| CN204030982U (en) | A kind of (PCC) power | |
| CN112706631B (en) | High power density water-cooling bidirectional charger device | |
| CN201966201U (en) | Cooling device of high power part | |
| CN109890169B (en) | High-density integrated triangular double-sided circulating cooling controller | |
| CN209462263U (en) | A kind of diesel locomotive high-power loop circuit heat pipe power module and its mirror-image structure | |
| CN208209797U (en) | A kind of switching mode microwave high pressure power supply based on multimedium heat exchange heat dissipation | |
| CN205693572U (en) | A kind of power module of integrated transformer Parallel opertation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 114000 212 Yue Ling Road, Anshan, Liaoning Applicant after: Rongxin Huike Electric Co.,Ltd. Address before: 114000 212 Yue Ling Road, Anshan, Liaoning Applicant before: RONGXIN HUIKO ELECTRIC TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |