CN203734508U - Display operation panel of frequency converter - Google Patents
Display operation panel of frequency converter Download PDFInfo
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- CN203734508U CN203734508U CN201320793343.9U CN201320793343U CN203734508U CN 203734508 U CN203734508 U CN 203734508U CN 201320793343 U CN201320793343 U CN 201320793343U CN 203734508 U CN203734508 U CN 203734508U
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- 239000004973 liquid crystal related substance Substances 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract 1
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- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
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Abstract
The utility model discloses a display operation panel of a frequency converter. The display operation panel comprises an operation module, an LCD (liquid crystal display) display module and an LED (light emitting diode) display module. Keys and a knob are arranged on a front panel of the operation module, a rear panel of the operation module is provided with internal bus interfaces and an external bus interface, an assembly mechanism is arranged at the top of the operation module, and a CPU (central processing unit), a memory and a main control board are arranged in the operation module. An LCD screen is arranged on a front panel of the LCD display module, a rear panel of the LCD display module is provided with an internal bus interface, the LCD display module and the operation module are connected with each other by an internal bus through the internal bus interface, and an assembly mechanism is arranged at each of the top and bottom of the LCD display module. An LED Nixie tube is arranged on a front panel of the LED display module, a rear panel of the LED display module is provided with an internal bus interface, the LED display module is connected with the operation module by an internal bus through the internal bus interface, and an assembly mechanism is arranged at each of the top and bottom of the LED display module. The assembly mechanisms of the operation module, the LCD display module and the LED display module are assembled with each other and combined in a laminating manner.
Description
Technical field
The utility model relates to low voltage electrical apparatus technology field, more particularly, relates to frequency converter.
Background technology
Frequency converter is a kind of conventional low-voltage equipment, and existing frequency converter generally includes for realizing man-machine interaction and having control panel, processor (CPU) and the memory etc. of display screen.Parameter identification and all optional parameters values thereof of in memory, having stored all parameters, user can carry out control processor by the keyboard of control panel, and from memory, reads the different values of various parameters, to realize the parameter configuration to frequency converter.
A kind of frequency converter of the prior art has adopted knob alternative orientation key.Like this, when the content showing in display screen is parameter identification, processor can rollably show output by parameter identification by display screen according to rotating based on knob the pulse signal producing, thereby make user in the time searching the corresponding parameter identification of parameter of its hope configuration, only need rotation the first knob can realize all parameter identifications and rollably show output by display screen, and without repeatedly clicking again directionkeys, thereby improve the efficiency of parameter configuration.
Another kind of frequency converter of the prior art has Parameter storage and Chinese-character display function, on frequency-changer operation panel, be provided with LCM liquid crystal display circuit, LED light and operation keyboard, in guidance panel, be provided with core processing single-chip microcomputer, core processing single-chip microcomputer respectively with LCM liquid crystal display circuit, LED light is connected with operation keyboard, core processing single-chip microcomputer is connected with communication extended chip, communication extended chip is connected with frequency converter interface, in LCM liquid crystal display circuit, be provided with LCD display and the LCD controller with Chinese word library, core processing single-chip microcomputer is connected with respectively memory circuit and clock circuit, can show foreign language, can show again Chinese, facilitate technical staff's operation.
Another kind of frequency converter of the prior art has frequency converter keyboard circuit, comprise the keyboard microcontroller with one group of charactron field driving port and one group of multiplexing port, the keyboard scanning circuit being connected with the multiplexing end of keyboard microcontroller, the gating chip with one group of charactron Strobe input and one group of charactron gating signal output, charactron Strobe input is wherein connected with the multiplexing port of keyboard microcontroller.
Another kind of frequency converter of the prior art has detachable operation panel, comprises manipulation mainboard and LCD display, and manipulation mainboard and LCD display are by the dismountable connection of buckle.
Comprehensive, above-mentioned frequency converter various of the prior art does not have to solve following problem:
1) single, the communication function that do not possess various communications protocols of communication mode.
2) combine constantly, cannot freely select to display screen freely selecting or combining such as LED and LCD.
3) volume is bigger than normal, can not regulate the volume of frequency converter.
4) operation more complicated.
Utility model content
The utility model is intended to propose a kind of display operating panel of the frequency converter that can comprehensively address the above problem.
According to an embodiment of the present utility model, a kind of display operating panel of frequency converter is proposed, comprise operational module, LCD display module and LED display module.On the front panel of operational module, be provided with button and knob, be provided with internal bus interface and external bus interface on the rear board of operational module, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module.On the front panel of LCD display module, there is LCD screen, on the rear board of LCD display module, there is internal bus interface, LCD display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LCD display module are provided with assemble mechanism.On the front panel of LED display module, there is LED charactron, on the rear board of LED display module, there is internal bus interface, LED display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LED display module are provided with assemble mechanism.The assemble mechanism of operational module, LCD display module and LED display module assembles mutually, combines with overlapped way.
In one embodiment, assemble mechanism comprises chute and slide block, and shape and the position of slide block and chute match, and slide block embeds in chute and assembles.In another embodiment, assemble mechanism comprises buckle and draw-in groove, and buckle is corresponding with position and the quantity of draw-in groove, and buckle is stuck in draw-in groove and assembles.
In one embodiment, internal bus is spi bus, and external bus is RS485 bus, and external bus interface is connected to ipc monitor device by RS485 bus.CPU is connected with master control borad by spi bus, is connected with memory by I2C bus, and memory is E2PROM.
In one embodiment, operational module also comprises indicator light, buzzer and clock circuit, and indicator light is arranged on the shell of operational module and is connected to CPU, and buzzer is connected with CPU, and clock circuit is connected with CPU.
In one embodiment, button is connected with CPU with knob.
According to another embodiment of the present utility model, a kind of display operating panel of frequency converter is proposed, comprise operational module and LCD display module.On the front panel of operational module, be provided with button and knob, be provided with internal bus interface and external bus interface on the rear board of operational module, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module.On the front panel of LCD display module, there is LCD screen, on the rear board of LCD display module, there is internal bus interface, LCD display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LCD display module are provided with assemble mechanism.The assemble mechanism of operational module and LCD display module assembles mutually, combines with overlapped way.
In one embodiment, assemble mechanism comprises chute and slide block, and shape and the position of slide block and chute match, and slide block embeds in chute and assembles.In another embodiment, assemble mechanism comprises buckle and draw-in groove, and buckle is corresponding with position and the quantity of draw-in groove, and buckle is stuck in draw-in groove and assembles.
In one embodiment, internal bus is spi bus, and external bus is RS485 bus, and external bus interface is connected to ipc monitor device by RS485 bus.CPU is connected with master control borad by spi bus, is connected with memory by I2C bus, and memory is E2PROM.
In one embodiment, operational module also comprises indicator light, buzzer and clock circuit, and indicator light is arranged on the shell of operational module and is connected to CPU, and buzzer is connected with CPU, and clock circuit is connected with CPU.
In one embodiment, button is connected with CPU with knob.
According to another embodiment of the present utility model, a kind of display operating panel of frequency converter is proposed, comprise operational module and LED display module.On the front panel of operational module, be provided with button and knob, be provided with internal bus interface and external bus interface on the rear board of operational module, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module.LED display module, on the front panel of LED display module, there is LED charactron, on the rear board of LED display module, have internal bus interface, LED display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LED display module are provided with assemble mechanism.The assemble mechanism of operational module and LED display module assembles mutually, combines with overlapped way.
In one embodiment, assemble mechanism comprises chute and slide block, and shape and the position of slide block and chute match, and slide block embeds in chute and assembles.In another embodiment, assemble mechanism comprises buckle and draw-in groove, and buckle is corresponding with position and the quantity of draw-in groove, and buckle is stuck in draw-in groove and assembles.
In one embodiment, internal bus is spi bus, and external bus is RS485 bus, and external bus interface is connected to ipc monitor device by RS485 bus.CPU is connected with master control borad by spi bus, is connected with memory by I2C bus, and memory is E2PROM.
In one embodiment, operational module also comprises indicator light, buzzer and clock circuit, and indicator light is arranged on the shell of operational module and is connected to CPU, and buzzer is connected with CPU, and clock circuit is connected with CPU.
In one embodiment, button is connected with CPU with knob.
The display operating panel of frequency converter of the present utility model provides LED and two kinds of display screens of LCD, and can freely combine as required, LCD can show the Word message of various language, and LED is that charactron shows, both combine can provide abundant and work information clearly.In operating aspect, the mode of operation that display operating panel of the present utility model provides knob and button to combine, has enriched the function of panel and has simplified operation.In communication aspects, use spi bus as internal bus, simultaneously with RS485 bus as with the bus of PERCOM peripheral communication, realized the variation of communication mode.
Brief description of the drawings
The above and other feature of the utility model, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and identical Reference numeral represents identical feature all the time in the accompanying drawings, wherein:
Fig. 1 has disclosed the Facad structure figure according to the display operating panel of the frequency converter of the first embodiment of the present utility model.
Fig. 2 has disclosed the structure figure of the display operating panel of the frequency converter of the first embodiment.
Fig. 3 has disclosed the front view of the first embodiment.
Fig. 4 has disclosed the rear view of the first embodiment.
Fig. 5 has disclosed the front view of the second embodiment.
Fig. 6 has disclosed the rear view of the 3rd embodiment.
Fig. 7 has disclosed the circuit theory diagrams of the display operating panel of the frequency converter that is applicable to each embodiment of the present utility model.
Embodiment
First the utility model provides dual display function that can independent assortment.LCD and LED display are provided, and both all can dismantle as required.
Shown in figure 1～Fig. 4, disclose the display operating panel of the first embodiment of the present utility model.Wherein Fig. 1 and Fig. 2 have disclosed respectively the structure chart of the front and back of this display operating panel, and Fig. 3 and Fig. 4 have disclosed respectively the front and back view of this display operating panel.
As shown in the figure, the display operating panel of this frequency converter comprises three modules, operational module 102, LCD display module 104 and LED display module 106.
On the front panel of operational module 102, be provided with button 121 and knob 122.In illustrated embodiment, be provided with a knob 122 in the position, upper middle of the front panel of operational module 102, be provided with several buttons 121 around this knob 122.On the rear board of operational module 102, be provided with internal bus interface 123 and external bus interface 124.In illustrated embodiment, the quantity of external bus interface 124 is one, and the quantity of internal bus interface 123 is two, and two internal bus interfaces 123 are respectively used to communicate by letter with LED module 106 with LCD module 104.In one embodiment, what internal bus adopted is spi bus, and what external bus adopted is RS485 bus.The top of operational module 102 is provided with assemble mechanism, can describe below the implementation of assemble mechanism and occupation mode.In operational module 102, be provided with CPU, memory and master control borad.
On the front panel of LCD display module 104, have on the rear board of LCD screen 141, LCD display module 104 and there is internal bus interface 142.LCD display module 104 is connected by internal bus by internal bus interface with operational module 102, in one embodiment, is connected and is communicated by spi bus.Top and the bottom of LCD display module 104 are provided with assemble mechanism, can describe below the implementation of assemble mechanism and occupation mode.
On the front panel of LED display module 106, there is LED charactron 161, on the rear board of LED display module 106, there is internal bus interface 162.LED display module 106 is connected by internal bus by internal bus interface with operational module 102, in one embodiment, is connected and is communicated by spi bus.Top and the bottom of LED display module 106 are provided with assemble mechanism, can describe below the implementation of assemble mechanism and occupation mode.
The assemble mechanism of operational module 102, LCD display module 104 and LED display module 106 assembles mutually, thereby with three modules of overlapped way combination.Assemble mechanism can be realized in such a way:
In the embodiment shown in Fig. 1～Fig. 4, assemble mechanism comprises chute 202 and slide block 204, and chute 202 is arranged on the top of modules, and the top of operational module 102, LCD display module 104 and LED display module 106 is provided with several chutes 202.The cross section of chute 202 is trapezoidal, launches gradually from top to bottom.Slide block 204 is arranged on the bottom of modules, is provided with slide block 204 in the bottom of LCD display module 104 and LED display module 106.Because operational module 102 is placed on orlop conventionally, therefore its bottom does not arrange slide block 204.It is trapezoidal that the cross section of slide block 204 is also, and is also to launch gradually from top to bottom, and slide block 204 matches with the shape of chute 202.The position of slide block 204 and chute 202 is also corresponding.In the time carrying out stacked assembling, slide block 204 side direction of the module in top slip in the chute 202 of the module in below, and because the cross section of slide block and chute is all trapezoidal, after assembling, the firm interlock of meeting, can not separate.By this kind of mode, operational module 102, LCD display module 104 and LED display module 106 are realized assembling mutually.In the embodiment shown in Fig. 1～Fig. 4, three modules are with the stacked assembling of upper and lower formula.It should be noted that, the upper-lower position of three modules can regulate as required, although conventionally operational module 102 can be placed in to below, this is not necessary.
In other embodiments, assemble mechanism also can adopt buckle and draw-in groove to realize.Buckle is corresponding with position and the quantity of draw-in groove, and buckle is stuck in draw-in groove and assembles.Buckle and draw-in groove are arranged on respectively in the module that need to assemble up and down.
Fig. 5 has disclosed the front view of the second embodiment.In the second embodiment, the display operating panel of this frequency converter comprises operational module 102 and LCD display module 104.
On the front panel of operational module 102, be provided with button 121 and knob 122.In illustrated embodiment, be provided with a knob 122 in the position, upper middle of the front panel of operational module 102, be provided with several buttons 121 around this knob 122.On the rear board of operational module 102, be provided with internal bus interface 123 and external bus interface 124.In illustrated embodiment, the quantity of external bus interface 124 is one, and the quantity of internal bus interface 123 is two, and two internal bus interfaces 123 are respectively used to communicate by letter with LED module 106 with LCD module 104.In one embodiment, what internal bus adopted is spi bus, and what external bus adopted is RS485 bus.The top of operational module 102 is provided with assemble mechanism.In operational module 102, be provided with CPU, memory and master control borad.
On the front panel of LCD display module 104, have on the rear board of LCD screen 141, LCD display module 104 and there is internal bus interface 142.LCD display module 104 is connected by internal bus by internal bus interface with operational module 102, in one embodiment, is connected and is communicated by spi bus.Top and the bottom of LCD display module 104 are provided with assemble mechanism.
Compare with the first embodiment, the difference of the second embodiment is only to comprise two modules: operational module 102 and LCD display module 104, do not have LED display module 106.The implementation of assemble mechanism can adopt the mode same with the first embodiment.
Fig. 6 has disclosed the rear view of the 3rd embodiment.In the 3rd embodiment, the display operating panel of this frequency converter comprises operational module 102 and LED display module 106.
On the front panel of operational module 102, be provided with button 121 and knob 122.In illustrated embodiment, be provided with a knob 122 in the position, upper middle of the front panel of operational module 102, be provided with several buttons 121 around this knob 122.On the rear board of operational module 102, be provided with internal bus interface 123 and external bus interface 124.In illustrated embodiment, the quantity of external bus interface 124 is one, and the quantity of internal bus interface 123 is two, and two internal bus interfaces 123 are respectively used to communicate by letter with LED module 106 with LCD module 104.In one embodiment, what internal bus adopted is spi bus, and what external bus adopted is RS485 bus.The top of operational module 102 is provided with assemble mechanism.In operational module 102, be provided with CPU, memory and master control borad.
On the front panel of LED display module 106, there is LED charactron 161, on the rear board of LED display module 106, there is internal bus interface 162.LED display module 106 is connected by internal bus by internal bus interface with operational module 102, in one embodiment, is connected and is communicated by spi bus.Top and the bottom of LED display module 106 are provided with assemble mechanism.
Compare with the first embodiment, the difference of the second embodiment is only to comprise two modules: operational module 102 and LED display module 106, do not have LCD display module 104.The implementation of assemble mechanism can adopt the mode same with the first embodiment.
Fig. 7 has disclosed the circuit theory diagrams of the display operating panel of the frequency converter that is applicable to each embodiment of the present utility model.Circuit theory diagrams shown in Fig. 7 can be applied to any one in three above-mentioned embodiment, no matter adopt what kind of module compound mode, can apply circuit theory described below and control.
As shown in Figure 7, in operational module 102, be provided with following circuit elements device: CPU302, memory 304, master control borad 306, indicator light 308, buzzer 310 and clock circuit 312.In one embodiment, internal bus adopts spi bus.Being connected all between CPU302 and master control borad 306, indicator light 308, buzzer 310, clock circuit 312, LCD display module 104 and LED display module 106 realizes by spi bus.In one embodiment, memory 304 is E2PROM, between memory 304 and CPU302, connects by I2C bus.CPU302 is the core of whole display operating panel.CPU is set up and communicates by letter with master control borad by spi bus.Master control borad is for the display screen at display operating panel by operational factor, such as showing, be convenient to user and staff the ruuning situation of monitoring frequency converter in LCD display and/or LED screen.Memory 304, such as storing parameters and historical failure information in E2PROM.Indicator light 308 is arranged on the shell of operational module, particular location can arrange as required but will ensure that indicator light 308 can easily be seen, indicator light 308 can be LED light and be connected to CPU, and indicator light 308 is used to indicate the operating state of frequency converter.Buzzer 310 is connected with CPU, and buzzer 310 is for fault alarm.When there is error message, buzzer will send the sound of characteristic frequency, and reminding user and staff now have fault to occur, also have the prompting of fault message simultaneously on display screen.Clock circuit 312 is connected with CPU, and clock circuit 312 shows current time in real time, and the time of record trouble while occurring.Continue with reference to shown in figure 7, in this embodiment, CPU302 can also pass through external bus, and RS485 bus is connected to ipc monitor device 314, on ipc monitor device 314, can move host computer monitoring software.Button 121 is all connected with CPU with knob 122, for input parameter.
LCD display module 104 is all connected with CPU by spi bus with LED display module 106.LCD display module has LCD display, can display text, the various information such as numeral, symbol, and LCD display is used for revising parameter or inquiry fault.LED display module has LED charactron, for show the operational factor of frequency converter with numeral, simple in structure, with low cost.
Display operating panel LCD of the present utility model and LED independent assortment as required, the button use that combines with knob, has enriched the function of panel.Can increase as required or reduce the size of guidance panel, thereby regulate the volume of frequency converter, split conveniently, safeguard simple and fast.Diversity communication mode and speed are fast.
The display operating panel of frequency converter of the present utility model provides LED and two kinds of display screens of LCD, and can freely combine as required, LCD can show the Word message of various language, and LED is that charactron shows, both combine can provide abundant and work information clearly.In operating aspect, the mode of operation that display operating panel of the present utility model provides knob and button to combine, has enriched the function of panel and has simplified operation.In communication aspects, use spi bus as internal bus, simultaneously with RS485 bus as with the bus of PERCOM peripheral communication, realized the variation of communication mode.
Above-described embodiment is available to be familiar with person in the art and to realize or use of the present utility model; those skilled in the art can be in the situation that not departing from utility model thought of the present utility model; above-described embodiment is made to various modifications or variation; thereby protection range of the present utility model do not limit by above-described embodiment, and it should be the maximum magnitude that meets the inventive features that claims mention.
Claims (9)
1. a display operating panel for frequency converter, is characterized in that, comprising:
Operational module, on the front panel of operational module, be provided with button and knob, on the rear board of operational module, be provided with internal bus interface and external bus interface, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module;
LCD display module, on the front panel of LCD display module, there is LCD screen, on the rear board of LCD display module, have internal bus interface, LCD display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LCD display module are provided with assemble mechanism;
LED display module, on the front panel of LED display module, there is LED charactron, on the rear board of LED display module, have internal bus interface, LED display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LED display module are provided with assemble mechanism;
The assemble mechanism of described operational module, LCD display module and LED display module assembles mutually, combines with overlapped way.
2. a display operating panel for frequency converter, is characterized in that, comprising:
Operational module, on the front panel of operational module, be provided with button and knob, on the rear board of operational module, be provided with internal bus interface and external bus interface, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module;
LCD display module, on the front panel of LCD display module, there is LCD screen, on the rear board of LCD display module, have internal bus interface, LCD display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LCD display module are provided with assemble mechanism;
The assemble mechanism of described operational module and LCD display module assembles mutually, combines with overlapped way.
3. a display operating panel for frequency converter, is characterized in that, comprising:
Operational module, on the front panel of operational module, be provided with button and knob, on the rear board of operational module, be provided with internal bus interface and external bus interface, the top of operational module is provided with assemble mechanism, is provided with CPU, memory and master control borad in operational module;
LED display module, on the front panel of LED display module, there is LED charactron, on the rear board of LED display module, have internal bus interface, LED display module is connected by internal bus by internal bus interface with operational module, and top and the bottom of LED display module are provided with assemble mechanism;
The assemble mechanism of described operational module and LED display module assembles mutually, combines with overlapped way.
4. the display operating panel of the frequency converter as described in any one in claim 1-3, is characterized in that, described assemble mechanism comprises chute and slide block, and shape and the position of slide block and chute match, and slide block embeds in chute and assembles.
5. the display operating panel of the frequency converter as described in any one in claim 1-3, is characterized in that, described assemble mechanism comprises buckle and draw-in groove, and buckle is corresponding with position and the quantity of draw-in groove, and buckle is stuck in draw-in groove and assembles.
6. the display operating panel of the frequency converter as described in any one in claim 1-3, is characterized in that,
Described internal bus is spi bus;
Described external bus is RS485 bus, and described external bus interface is connected to ipc monitor device by RS485 bus.
7. the display operating panel of frequency converter as claimed in claim 6, is characterized in that,
Described CPU is connected with master control borad by spi bus, is connected with memory by I2C bus, and described memory is E2PROM.
8. the display operating panel of frequency converter as claimed in claim 7, is characterized in that, described operational module also comprises indicator light, buzzer and clock circuit,
Indicator light is arranged on the shell of operational module and is connected to CPU;
Buzzer is connected with CPU;
Clock circuit is connected with CPU.
9. the display operating panel of frequency converter as claimed in claim 7, is characterized in that, described button is connected with CPU with knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793343.9U CN203734508U (en) | 2013-12-04 | 2013-12-04 | Display operation panel of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793343.9U CN203734508U (en) | 2013-12-04 | 2013-12-04 | Display operation panel of frequency converter |
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| Publication Number | Publication Date |
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| CN203734508U true CN203734508U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320793343.9U Expired - Lifetime CN203734508U (en) | 2013-12-04 | 2013-12-04 | Display operation panel of frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3026813A1 (en) * | 2014-11-26 | 2016-06-01 | ABB Technology Oy | Frequency converter |
-
2013
- 2013-12-04 CN CN201320793343.9U patent/CN203734508U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3026813A1 (en) * | 2014-11-26 | 2016-06-01 | ABB Technology Oy | Frequency converter |
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Effective date of registration: 20230331 Address after: 325603 No. 1, Zhengtai Road, Zhengtai Industrial Park, beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Address before: 200063, 505 Wuning Road, Putuo District, Shanghai Patentee before: SEARI ELECTRIC TECHNOLOGY Co.,Ltd. Patentee before: SHANGHAI CHINT POWER SYSTEMS Co.,Ltd. Patentee before: ZHEJIANG CHINT ELECTRICS Co.,Ltd. |
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Granted publication date: 20140723 |
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