CN207067232U - Voltage detecting circuit and voltage tester - Google Patents
Voltage detecting circuit and voltage tester Download PDFInfo
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- CN207067232U CN207067232U CN201720537224.5U CN201720537224U CN207067232U CN 207067232 U CN207067232 U CN 207067232U CN 201720537224 U CN201720537224 U CN 201720537224U CN 207067232 U CN207067232 U CN 207067232U
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Abstract
The utility model provides a kind of voltage detecting circuit and voltage tester, is related to universal meter field, including：Gearshift voltage changing module, rectification module and display module；Wherein, shift gears voltage changing module first input end ground connection, the second input connection load；A voltmeter is connected between first input end and the second input；The input of the output end connection rectification module of gearshift voltage changing module；The output end connection display module of rectification module；When voltmeter has registration, and display module is shown, the voltage is active voltage；When voltmeter has registration, and display module is without display, the voltage is reactive voltage.Can be that active voltage or reactive voltage are identified to electrical leakage voltage, accurately to remind whether maintenance personal needs that electrical equipment is placed under repair or disabled by the voltage detecting circuit and voltage tester.
Description
Technical field
Universal meter field is the utility model is related to, more particularly, to a kind of voltage detecting circuit and voltage tester.
Background technology
During being overhauled to power transmission sequence or electrical equipment, when Leaked Current of Line to Ground occurs, electric leakage circuit with
Ground forms loop, while has voltage generation, has electric current to flow through.This voltage can drive electrical equipment to work, with using power supply
Voltage phase difference is very few, and usual this voltage is referred to as：Active voltage.Measured using voltmeter or universal meter can.
But not all voltage measured by voltmeter or universal meter, electrical equipment can be driven to do work, make electricity
Gas equipment work, that is to say, that the voltage measured by voltmeter or universal meter may not have carrying load ability, generally by it is this not
The voltage that can be done work is referred to as reactive voltage, and this voltage will not drive loaded work piece, and more people will not be damaged.It is existing at present
Technology can not be that active voltage or reactive voltage are identified to electrical leakage voltage, maintenance personal can usually be carried out unnecessary
Maintenance, cause the waste of human and material resources resource.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of voltage detecting circuit and voltage tester, can
It is that active voltage or reactive voltage are identified to electrical leakage voltage, accurately to remind whether maintenance personal is needed to electrical equipment
Place under repair or disable.
In a first aspect, the utility model embodiment provides a kind of voltage detecting circuit, including：Shift gears voltage changing module, whole
Flow module and display module；
The first input end ground connection of gearshift voltage changing module, the connection load of the second input；
A voltmeter is connected between first input end and the second input；
The input of the output end connection rectification module of gearshift voltage changing module；
The output end connection display module of rectification module；
When voltmeter has registration, and display module is shown, the voltage is active voltage；
When voltmeter has registration, and display module is without display, the voltage is reactive voltage.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, gearshift voltage changing module includes：Transformer and more gear selecting switch；
Transformer includes：Primary coil, iron core and secondary coil；
The first port of primary coil, the second input as gearshift voltage changing module；
Multiple ports are drawn at the different numbers of turn of primary coil, to form multiple different voltage gears；
Multiple ports are connected with the folding end of more gear selecting switch；
The other end of more gear selecting switch, the first input end as gearshift voltage changing module；
Voltage gear includes：2V gears, 127V gears, 220V gears, 380V gears, 660V gears, 1140V gears, 1250V gears.
With reference in a first aspect, the utility model embodiment provides second of possible embodiment of first aspect, its
In, rectification module includes：Bridge rectifier；
Bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；
Diode D1 anode is connected with the first port of secondary coil and diode D2 negative electrode respectively；
First output end of the diode D1 negative electrode as rectification module, is connected with diode D4 negative electrode；
Diode D4 anode is connected with the second port of secondary coil and diode D3 negative electrode respectively；
Second output end of the diode D3 anode as rectification module, is connected with diode D2 anode.
With reference in a first aspect, the utility model embodiment provides the third possible embodiment of first aspect, its
In, bridge rectifier is also associated with filtration module；
Filtration module is connected with display module.
With reference in a first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect, its
In, filtration module includes：Electric capacity C1, electric capacity C2, electric capacity C3 and resistance R1；
Electric capacity C1 both ends connect the first output end and the second output end of rectification module respectively；
Electric capacity C2, resistance R1 one end connect electric capacity C1 one end respectively；
Electric capacity C2, the resistance R1 other end connect electric capacity C3 one end respectively；
The electric capacity C3 other end connection electric capacity C1 other end.
With reference in a first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, its
In, display module includes：Light emitting diode；
Light emitting diode is in parallel with electric capacity C3.
With reference in a first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, its
In, the quantity of light emitting diode is two.
Second aspect, the utility model embodiment also provide a kind of voltage tester, including：Tester body, gear are adjusted
Save switch, digital display screen, p-wire；
Voltage detecting circuit as described in relation to the first aspect is installed in tester body；
Gear adjusting switch, digital display screen and p-wire are arranged on tester body；
Digital display screen is shown for the registration of voltmeter in voltage detecting circuit and the brightness of light emitting diode is shown；
P-wire is provided with test pen.
With reference to second aspect, the utility model embodiment provides the first possible embodiment of second aspect, its
In, in addition to：Test wire winding device；
Test wire winding device is fixedly installed in tester body, and is connected with p-wire.
With reference to second aspect, the utility model embodiment provides second of possible embodiment of second aspect, its
In, in addition to：Neck；
Neck is arranged on tester body, for fixing test pen.
The technical scheme that the utility model embodiment provides brings following beneficial effect：The utility model embodiment provides
A kind of voltage detecting circuit in, including：Gearshift voltage changing module, rectification module and display module, wherein, voltage changing module of shifting gears
First input end ground connection, the second input connection load；A voltmeter is also connected between first input end and the second input,
The input of the output end connection rectification module of gearshift voltage changing module；The output end connection display module of rectification module.
The voltage detecting circuit provided using the utility model embodiment, when the second input of gearshift voltage changing module connects
When connecing load, voltmeter detects voltage, and has registration to show, meanwhile, display module is shown, at this point it is possible to judge
The voltage is active voltage；When voltmeter has registration, and display module is without display, then the voltage is reactive voltage.It is logical
The voltage detecting circuit is crossed, can be that active voltage or reactive voltage are identified to electrical leakage voltage, is repaired with accurate remind
Whether personnel need that electrical equipment is placed under repair or disabled.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structured flowchart for voltage detecting circuit that the utility model embodiment one provides；
Fig. 2 is a kind of circuit diagram for voltage detecting circuit that the utility model embodiment two provides；
Fig. 3 is the circuit diagram of the filtration module in a kind of voltage detecting circuit that the utility model embodiment two provides；
Fig. 4 is a kind of schematic diagram for voltage tester that the utility model embodiment three provides.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this
The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
After being detected by existing voltmeter or universal meter to electrical leakage voltage, it is to have that can not judge the voltage
Work(voltage or reactive voltage, it can frequently result in maintenance personal and repaired for reactive voltage, cause unnecessary manpower, thing
The power wasting of resources.Based on this, the utility model embodiment provides a kind of voltage detecting circuit and voltage tester, can be right
Electrical leakage voltage is that active voltage or reactive voltage are identified, accurately to remind whether maintenance personal needs to enter electrical equipment
Row is repaired or disabled.
Embodiment one：
The utility model embodiment provides a kind of voltage detecting circuit, and shown in Figure 1, the voltage detecting circuit includes：
Gearshift voltage changing module 11, rectification module 12 and display module 13.
Wherein, the first input end ground connection of gearshift voltage changing module 11, the connection load of the second input；First input end and
A voltmeter is connected between two inputs；The input of the output end connection rectification module 12 of gearshift voltage changing module 11；Rectification mould
The output end connection display module 13 of block 12；When voltmeter has registration, and display module 13 is shown, the voltage is active
Voltage；When voltmeter has registration, and display module is without display, the voltage is reactive voltage.
When specific implementation, gearshift voltage changing module 11 can detect to the electrical leakage voltage of various different loads,
By the voltage detected by its output end, transmit to rectification module 12, rectification module 12 is again by its output end, by voltage
Display module 13 is sent to, when display module 13 is not shown, and voltmeter has registration, it is possible to determine that the electricity now detected
Press as reactive voltage.The detection gear of electrical leakage voltage have it is multiple, be specially：2V gears, 127V gears, 220V gears, 380V gears, 660V
Gear, 1140V gears, 1250V gears, can so be detected to the electrical equipment or power transmission sequence of a variety of different voltages.
The voltage that generally use voltmeter or universal meter detect, it may be possible to can have to the voltage of external world's acting
Work(voltage, it is also possible to without the voltage of carrying load ability, i.e. reactive voltage, therefore, detected using voltmeter or universal meter,
It is active voltage or reactive voltage that the voltage, which can not be judged, and then can not know and the voltage should be taken measures or not, is carried out
Maintenance of equipment or deactivation.
The voltage detecting circuit provided using the utility model embodiment, when the second input of gearshift voltage changing module 11
During connection load, voltmeter detects voltage, and has registration to show, meanwhile, display module 13 is shown, at this point it is possible to
Judge the voltage for active voltage；When voltmeter has registration, and display module is without display, then the voltage is idle electricity
Pressure.Can be that active voltage or reactive voltage are identified to electrical leakage voltage, accurately to remind by the voltage detecting circuit
Whether maintenance personal needs that electrical equipment is placed under repair or disabled.
Embodiment two：
The utility model embodiment provides a kind of voltage detecting circuit, as a kind of preferred embodiment, as shown in Fig. 2 changing
Keep off the first input end B ground connection of voltage changing module 21, the second input A connections load；First input end B and the second input A it
Between connect a voltmeter；The input of the output end connection rectification module 22 of gearshift voltage changing module 21；The output of rectification module 22
End connection display module 23；In the voltage detecting circuit, gearshift voltage changing module 21 includes：Transformer and the selection of more gears are opened
Close.
Wherein, transformer includes：Primary coil, iron core and secondary coil.The first port of primary coil, as gearshift
Second input of voltage changing module；Multiple ports are drawn at the different numbers of turn of primary coil, to form multiple different voltages
Gear；Multiple ports are connected with the folding end of more gear selecting switch；The other end of more gear selecting switch, as gearshift transformation
The first input end of module.Voltage gear includes：2V gears, 127V gears, 220V gears, 380V gears, 660V gears, 1140V gears, 1250V
Gear.
In addition, the second input of gearshift voltage changing module 21 is also connected with a master switch K, for controlling the work of whole circuit
Make and stop, for the sake of security, switch K is also associated with a fuse, the primary of the other end connection transformer of fuse
The first port of coil.
Transformer (Transformer) is the device for changing alternating voltage using the principle of electromagnetic induction, main member
It is primary coil, secondary coil and iron core (magnetic core).Major function has：Voltage transformation, current transformation, impedance are converted, isolated, be steady
Press (magnetic saturation transformer) etc..It can be divided into, according to use,：Distribution transformer, full-sealed transformer, combined transformer, dry type become
Depressor, oil-filled transformer, single-phase transformer, furnace transformer, rectifier transformer etc..Transformation in the utility model embodiment
Device is connected with rectification module, realizes the effect of rectifier transformer.
Rectification module 22 includes：Bridge rectifier.
Specifically, bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；Wherein, diode
D1 anode is connected with the first port of secondary coil and diode D2 negative electrode respectively；Diode D1 negative electrode is as whole
First output end of flow module, is connected with diode D4 negative electrode；Diode D4 anode the second end with secondary coil respectively
The connection of mouth and diode D3 negative electrode；Second output end of the diode D3 anode as rectification module, with diode D2
Anode connection.
Within each work period of rectifier bridge, the same time only has two diodes to be operated, and passes through diode
One-way conduction function, strong alternating current are converted into unidirectional DC pulse voltage, with the rectification effect realized.
In addition, in order that rectifying and wave-filtering effect is best, as a kind of preferred embodiment, bridge rectifier is also associated with filtering
Module 24, the filtration module 24 are connected with display module 23.
Specifically, filtration module 24 includes：Electric capacity C1, electric capacity C2, electric capacity C3 and resistance R1.
Electric capacity C1 both ends connect the first output end and the second output end of rectification module respectively；Electric capacity C2, resistance R1
One end connect electric capacity C1 one end respectively；Electric capacity C2, the resistance R1 other end connect electric capacity C3 one end respectively；Electric capacity C3's
The other end connection electric capacity C1 other end.
Certainly, filtration module 24 can also be other filter circuits, such as, shown in Figure 3, the filter circuit bag
Include：Electric capacity vC1, mu balanced circuit vU1 and electric capacity vC2.
Wherein, electric capacity vC1 and electric capacity vC2 be connected between mu balanced circuit vU1 grounding ports and input port with
And between grounding ports and output port；Mu balanced circuit vU1 output port is also connected with the output end of rectification module, passes through the filter
Wave circuit can equally realize filter effect.
Display module 23 includes：Light emitting diode, the light emitting diode are in parallel with electric capacity C3.
The quantity of light emitting diode, can be two, or it is multiple, it is in parallel with electric capacity C3, in the utility model
In embodiment, display module 23 includes：Light emitting diode D5, light emitting diode D6.
It should be noted that display module 23 can also be other display circuits, as long as can be used for judging to be detected
To voltage whether can do work.
The voltage detecting circuit provided by the utility model embodiment, when the second input of gearshift voltage changing module 21
During connection load, voltmeter detects voltage, and has registration to show, meanwhile, the lumination of light emitting diode in display module 23,
At this point it is possible to judge the voltage for active voltage；When voltmeter has registration, and the light emitting diode in display module 23 does not light
When, then the voltage is reactive voltage.Can be active voltage or reactive voltage to electrical leakage voltage by the voltage detecting circuit
It is identified, accurately to remind whether maintenance personal needs that electrical equipment is placed under repair or disabled.
Embodiment three：
The utility model embodiment also provides a kind of voltage tester, shown in Figure 4, and the voltage tester includes：Survey
Try instrument body 41, gear adjusting switch 43, digital display screen 42, p-wire 44.
Wherein, the voltage detecting circuit as described in above-mentioned any embodiment is installed in tester body 41；Gear is adjusted
Switch 43, digital display screen 42 and p-wire 44 are arranged on tester body 41；Digital display screen 42 is examined for voltage
The registration of voltmeter is shown in slowdown monitoring circuit and the brightness of light emitting diode is shown；P-wire 44 is provided with test pen 45.
In addition, also include：Test wire winding device 47.
Test wire winding device 47 is fixedly installed in tester body 41, and is connected with p-wire 44.
The voltage tester that the utility model embodiment is provided also includes：Neck 46；
Neck 46 is arranged on tester body 41, for fixing test pen 45.
The voltage tester can directly be controlled the work of the tester or stopping or be changed by gear adjusting switch 43
Gear, a master switch can also be set on tester body 41 again, to realize the work of the tester or stopping.
During using the voltage tester, user need to only remove test pen 45, and the p-wire 44 that pulls outward so that survey
The length of examination line 44 meets the length that user's needs are tested.The voltage tester that the utility model embodiment is provided, structure
Simply, easy to use, measurement is accurate, and convenient reading, cost is low, applied widely, service life length, has safe and reliable work
With.
In a kind of voltage tester that the utility model embodiment provides, when 45 1 ground connection of test pen, another connects negative
During load, there is registration to show on digital display screen 42, while can light, at this point it is possible to judge the voltage for active voltage；When
Digital display screen 42 has a registration, but it is not luminous when, then the voltage is reactive voltage., can be right by the voltage tester
Electrical leakage voltage is that active voltage or reactive voltage are identified, accurately to remind whether maintenance personal needs to enter electrical equipment
Row is repaired or disabled.
The voltage tester that the utility model embodiment provides, has with the voltage detecting circuit that above-described embodiment is provided
Identical technical characteristic, so can also solve identical technical problem, reach identical technique effect.
In the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in utility model.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model described should be wanted with right
The protection domain asked is defined.
Claims (10)
- A kind of 1. voltage detecting circuit, it is characterised in that including：Gearshift voltage changing module, rectification module and display module；The first input end ground connection of the gearshift voltage changing module, the connection load of the second input；A voltmeter is connected between the first input end and second input；The output end of the gearshift voltage changing module connects the input of the rectification module；The output end connection display module of the rectification module；When the voltmeter has registration, and the display module is shown, the voltage is active voltage；When the voltmeter has registration, and the display module is without display, the voltage is reactive voltage.
- 2. voltage detecting circuit according to claim 1, it is characterised in that the gearshift voltage changing module includes：Transformer And more gear selecting switch；The transformer includes：Primary coil, iron core and secondary coil；The first port of the primary coil, the second input as the gearshift voltage changing module；Multiple ports are drawn at the different numbers of turn of the primary coil, to form multiple different voltage gears；The multiple port is connected with the folding end of more gear selecting switch；The other end of more gear selecting switch, the first input end as the gearshift voltage changing module；The voltage gear includes：2V gears, 127V gears, 220V gears, 380V gears, 660V gears, 1140V gears, 1250V gears.
- 3. voltage detecting circuit according to claim 2, it is characterised in that the rectification module includes：Bridge rectifier；The bridge rectifier includes：Diode D1, diode D2, diode D3, diode D4；The anode of the diode D1 is connected with the first port of the secondary coil and the negative electrode of the diode D2 respectively；First output end of the negative electrode of the diode D1 as the rectification module, is connected with the negative electrode of the diode D4；The anode of the diode D4 is connected with the second port of the secondary coil and the negative electrode of the diode D3 respectively；Second output end of the anode of the diode D3 as the rectification module, is connected with the anode of the diode D2.
- 4. voltage detecting circuit according to claim 3, it is characterised in that the bridge rectifier is also associated with filtering mould Block；The filtration module is connected with the display module.
- 5. voltage detecting circuit according to claim 4, it is characterised in that the filtration module includes：Electric capacity C1, electric capacity C2, electric capacity C3 and resistance R1；The both ends of the electric capacity C1 connect the first output end and the second output end of the rectification module respectively；The electric capacity C2, one end of the resistance R1 connect one end of the electric capacity C1 respectively；The electric capacity C2, the other end of the resistance R1 connect one end of the electric capacity C3 respectively；The other end of the electric capacity C3 connects the other end of the electric capacity C1.
- 6. voltage detecting circuit according to claim 5, it is characterised in that the display module includes：Light emitting diode；The light emitting diode is in parallel with the electric capacity C3.
- 7. voltage detecting circuit according to claim 6, it is characterised in that the quantity of the light emitting diode is two.
- A kind of 8. voltage tester, it is characterised in that including：Tester body, gear adjusting switch, digital display screen, test Line；Voltage detecting circuit as described in claim 1-7 is installed in the tester body；The gear adjusting switch, the digital display screen and the p-wire are arranged on the tester body；The digital display screen is shown for the registration of voltmeter in the voltage detecting circuit and the brightness of light emitting diode Display；The p-wire is provided with test pen.
- 9. voltage tester according to claim 8, it is characterised in that also include：Test wire winding device；The test wire winding device is fixedly installed in the tester body, and is connected with the p-wire.
- 10. voltage tester according to claim 9, it is characterised in that also include：Neck；The neck is arranged on the tester body, for fixing the test pen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720537224.5U CN207067232U (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720537224.5U CN207067232U (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207067232U true CN207067232U (en) | 2018-03-02 |
Family
ID=61505762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720537224.5U Active CN207067232U (en) | 2017-05-15 | 2017-05-15 | Voltage detecting circuit and voltage tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207067232U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015050A (en) * | 2017-05-15 | 2017-08-04 | 中领世能（天津）科技有限公司 | Voltage detecting circuit and voltage tester |
| CN110071647A (en) * | 2019-04-01 | 2019-07-30 | 邓依诺 | A kind of middle school student's Experiment of Electrical Circuits power-supply system |
| CN112415255A (en) * | 2020-11-14 | 2021-02-26 | 陕西航空电气有限责任公司 | Improved active current sampling circuit |
-
2017
- 2017-05-15 CN CN201720537224.5U patent/CN207067232U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015050A (en) * | 2017-05-15 | 2017-08-04 | 中领世能（天津）科技有限公司 | Voltage detecting circuit and voltage tester |
| CN110071647A (en) * | 2019-04-01 | 2019-07-30 | 邓依诺 | A kind of middle school student's Experiment of Electrical Circuits power-supply system |
| CN112415255A (en) * | 2020-11-14 | 2021-02-26 | 陕西航空电气有限责任公司 | Improved active current sampling circuit |
| CN112415255B (en) * | 2020-11-14 | 2023-10-24 | 陕西航空电气有限责任公司 | Improved active current sampling circuit |
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Effective date of registration: 20210114 Address after: 300112 526-10, Taihe building, Xiyingmen street, Xiqing District, Tianjin Patentee after: TIANJIN GENENG TECHNOLOGY Co.,Ltd. Address before: No.10, Liaohe North Road, industrial park, Tianjin Beichen economic and Technological Development Zone, Beichen District, Tianjin 300400 Patentee before: Zhonglingshineng (Tianjin) Technology Co.,Ltd. |