CN106941064B - X-ray tube and its manufacturing method - Google Patents
X-ray tube and its manufacturing method Download PDFInfo
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- CN106941064B CN106941064B CN201710278207.9A CN201710278207A CN106941064B CN 106941064 B CN106941064 B CN 106941064B CN 201710278207 A CN201710278207 A CN 201710278207A CN 106941064 B CN106941064 B CN 106941064B
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- ray tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/16—Vessels; Containers; Shields associated therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/385—Exhausting vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/39—Degassing vessels
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- X-Ray Techniques (AREA)
Abstract
The present invention discloses a kind of X-ray tube, including ceramic shell, it includes cavity, the cavity includes the interconnecting piece that cylindrical first part, one end are connect with the first part one end and the cylindrical second part that one end is connect with the other end of the interconnecting piece, wherein, the diameter of the first part is more than the diameter of the second part, which is connected smoothly the first part and the second part, and the interconnecting piece, the first and second part are coaxial；Anode is set in the second part and coaxial with the ceramic shell；Shielding case is set in the other end of the first part and coaxial with the ceramic shell；Cathode is set in the shielding case.Its impact resistance, alternating hot and cold performance and pressure-resistant performance are stronger.Invention additionally discloses a kind of manufacturing methods for the X-ray tube that X-ray tube can be made more fully to deflate.
Description
Technical field
The present invention relates to X-ray Manifold technologies, and in particular to X-ray tube and its manufacturing method.
Background technology
X ray tubes include two electrodes of anode and cathode, are respectively used to receive the target of electron bombardment and launching electronics
Filament.Two electrodes are sealed in the shell of high vacuum.
The mainly glass tube of safety check class X-ray tube at present, and glass tube just has the general drawback of glass tube, shock resistance
Property, alternating hot and cold performance and pressure-resistant performance be not strong.Cause glass tube be easy in transit with damaged in use, to affect
The yield rate and service life of pipe.
For this reason, it may be desirable to seek a kind of technical solution, at least to mitigate the above problem.
Invention content
On the one hand, the technical problem to be solved by the present invention is to provide a kind of impact resistance, alternating hot and cold performance and pressure resistance
The stronger X ray tubes of performance.
On the other hand, the technical problem to be solved by the present invention is to provide a kind of X that X ray tubes can be made more fully to deflate
The manufacturing method of ray tube.
The technical issues of to solve one side, the present invention use following technical proposals.
A kind of X-ray tube, including：
Ceramic shell comprising cavity, the cavity include cylindrical first part, one end and the first part one end
The cylindrical second part that the interconnecting piece of connection and one end are connect with the other end of the interconnecting piece, wherein this first
The diameter divided is more than the diameter of the second part, which is connected smoothly the first part and the second part, should
Interconnecting piece, the first and second part are coaxial；
Anode is set in the second part and coaxial with the ceramic shell；
Shielding case is set in the other end of the first part and coaxial with the ceramic shell；And
Cathode is set in the shielding case.
The shielding case includes the second ring in annular shape for being less than the first ring outer diameter in the first circular ring, outer diameter
And the connection ring for connecting one end of first ring with one end of second ring, wherein second ring is coaxial with first ring
And towards the anode.
There is gap between the anode and the ceramic shell.
It further include the window for making thin formation by grinding positioned at ceramic shell outer wall corresponding with first part.
Further include be installed on first part's other end by binding post, the exhaust pipe edge of a knife, argon arc welding lid together in interior
Protective cover.
It further include the radiator being connect with the anode.
The technical issues of to solve another aspect, the present invention use following technical proposals.
A kind of manufacturing method of X-ray tube, includes the following steps：
Step 1, the X-ray tube of above structure is assembled；
Step 2, the X-ray tube assembled to step 1 vacuumizes, and is evacuated to vacuum degree and is at least 10^（-4）The order of magnitude；
Step 3, gas exhaust treatment is carried out in two steps：
The first step, the X-ray tube after step 2 is vacuumized are placed in roasting plant, and the temperature of roasting plant is risen from 0 DEG C
To 350-380 DEG C, heating-up time at least 1h, vacuum degree at this time reaches 10^（-5）The order of magnitude, and keep this order of magnitude
Vacuum degree keeps the temperature at least 2h at this temperature and the vacuum degree order of magnitude；It then proceedes to be warming up to 500-580 DEG C, the heating-up time is extremely
Few 2h, cools down after keeping the temperature at least 3h at this temperature, until X-ray tube drops to room temperature；
Second step, first to the filament of X-ray tube be powered, electrical current 3.7A, make filament be warming up to 2000 degree and with
On, further degassing is carried out to filament；Then in X-ray tube plus 40kV high pressures, adjustment heater current make tube current be 4mA simultaneously
Keep at least 2.5h；Subsequently so that tube current is increased to 6mA as low as 30kV adjustment heater currents high pressure drop and keeps at least 2h；
Later by high pressure drop as low as 20kV, adjustment heater current makes tube current increase to 8mA and keeps at least 0.5h, then high pressure is reduced
To 15kV, so that tube current is continually maintained in 8mA and keep at least 0.5h；High pressure is finally closed, waits for that X-ray tube is cooled to room temperature
It will be taken out after X-ray tube clamp afterwards；
Step 4, it is seasoned that the X-ray tube taken out to step 3 carries out oil pressure；
In step 3, voltage range ± 0.5%, current range ± 0.2%.
Oil pressure is seasoned to be as follows：
Step 41,1h and within the experienced voltage for being applied to X-ray tube is gradually increased to 190kV, X-ray from 50 kV
The anode current of pipe is maintained at 2mA；
Step 42, after completing step 41, X-ray tube is steady in the case where experienced voltage is 190kV, anode current is 2mA
Fixed work at least 2h；
Step 43, after completing step 42, X-ray tube is steady in the case where experienced voltage is 175kV, anode current is 2mA
Fixed work at least 8h；
Step 44, after completing step 43, X-ray tube is opened in the case where experienced voltage is 175kV, anode current is 2mA
It is at least 1000 times disconnected；
Step 45, complete step 44 after, X-ray tube in the case where experienced voltage is 175kV, anode current is 2mA again
Steady operation at least 8h；
In step 41-45, voltage range ± 0.5%, current range ± 0.05%.
The present invention has following advantageous effects.
The ceramic shell of X-ray tube of the present invention includes cavity, which includes cylindrical first part, one end and the
The interconnecting piece of a part of one end connection and the cylindrical second part of the other end of one end and interconnecting piece connection, first
The diameter divided is more than the diameter of second part, which is connected smoothly first part and the second part, interconnecting piece,
First and second part is coaxial；Anode jacket is loaded in second part and coaxial with ceramic shell；Shielding case is set in the another of first part
It is in one end and coaxial with ceramic shell；Ceramic shell plays insulating effect, and cavity is whole using the above structure, and first part is protected
Demonstrate,prove pressure-resistant distance, first part in the middle part of X-ray tube makes electric field shrink to second part reduced diameter, reaches second part
The electric field of the end opposite with first part is almost nil, to reduce the discharge probability of X-ray tube, improves X-ray tube
Compressive resistance.Also, ceramics itself pressure resistance, alternating hot and cold performance and intensity will be better than glass, have compared with high impact properties, can
To meet harsher working environment.
The manufacturing method of the present invention gas exhaust treatment step is carried out in two steps, and strictly controls the gas exhaust treatment technique ginseng of two steps
Number, the first step integrally heat up to X-ray tube by roasting plant, so that the gas that X-ray tube material surface adheres to is excluded clean, the
Two steps are by electron bombardment target surface, and so that target is generated instantaneous high-temperature makes material deflate again, and electron bombardment can will hide in X
The gas of ray tube material deeper releases.As it can be seen that the manufacturing method of the present invention can make X-ray tube more fully deflate, carry
Vacuum degree in senior executive ensures X-ray tube steady operation.
Description of the drawings
Fig. 1 is the structural schematic diagram of X-ray tube of the present invention.
Fig. 2 is the focusing electrode of X-ray tube of the present invention and the structural schematic diagram that focusing electrode locating plate is combined.
Fig. 3 is the upward view of Fig. 2.
Fig. 4 is the focus mask of X-ray tube of the present invention.
Specific implementation mode
For can the technical characteristic that the present invention will be described in detail and effect, and can be realized according to the content of this specification, below
Embodiments of the present invention are further illustrated.
Fig. 1 illustrates a kind of embodiment of X-ray tube in the numerous embodiments of the present invention.The X-ray tube includes poly-
Burnt pole 1, focusing electrode locating plate 2, focus mask 4, ceramic shell 5, anode 6, shielding case 8 and cathode 11.
Ceramic shell 5 includes cavity, which includes first part 51, interconnecting piece 52 and second part 53.First part
51 is cylindrical.One end of interconnecting piece 52 is connect with one end of first part 51.Second part 53 is cylindrical, one end and company
The second part 53 of the other end connection of socket part 52.The diameter of first part 51 is more than the diameter of second part 53, interconnecting piece
52 are connected smoothly first part 51 and this second 53 points, and interconnecting piece 52, the first and second part 51,53 are coaxial.
Anode 6 is set in second part 53, coaxial with ceramic shell 5 preferable.
Shielding case 8 is set in the other end of first part 51, coaxial with ceramic shell 5 preferable.
Cathode 11 is set in shielding case 8.Together referring to Fig. 2-4, focusing electrode 1 is set in shielding case 8, the lamp of cathode 11
Silk stretches into focusing electrode 1.Focus mask 4 is fixed on by laser welding on focusing electrode 1, that side opposite with cathode 11 is located at.It is poly-
Burnt pole locating plate 2 is set in in cathode 11, is fixed by screw 3 and focusing electrode 1.
In some embodiments, shielding case 8 includes being less than the first ring outer diameter 81 in the first circular ring 81, outer diameter
In circular the second ring 82 and the connection ring 83 for connecting one end of first ring 81 with one end of the second ring 82.Second ring
82 is coaxial with the first ring 81, and the second ring 82 is towards anode 6.Shielding case 8 uses this stepped design, so that electric field is reached root several
It is zero, preferably can plays the role of shielding electric field to the burr of 1 the inside of focusing electrode, to improve resistance to voltage levels.
In some embodiments, there is gap between anode 6 and ceramic shell 5.Anode 6 is made of oxygen-free copper, can be
Electronics is beaten the heat generated on tungsten target and is taken away rapidly.
In some embodiments, X-ray tube of the invention further includes corresponding with first part 51 outer positioned at ceramic shell 5
The window 54 for making thin formation by grinding of wall makees thin other X for reaching window effect, capable of constraining except for the windows 54 by grinding
Ray ensures that injection ray is more uniform.
In some embodiments, X-ray tube of the invention further include be installed on first part 51 the other end by wiring
Column 10, the exhaust pipe edge of a knife, argon arc welding lid are together in interior protective cover 9.
In some embodiments, X-ray tube of the invention further includes the radiator 7 being connect with anode 6, to increase radiating surface
Product.
A kind of manufacturing method of X-ray tube of the present invention, includes the following steps：
Step 1, the X-ray tube of above structure is assembled；
Step 2, the X-ray tube assembled to step 1 vacuumizes, and is evacuated to vacuum degree and is at least 10^（-4）The order of magnitude；
Step 3, gas exhaust treatment is carried out in two steps：
The first step, the X-ray tube after step 2 is vacuumized are placed in roasting plant, and the temperature of roasting plant is risen from 0 DEG C
To 350-380 DEG C, such as 350 DEG C, 360 DEG C, 370 DEG C, 380 DEG C etc., heating-up time at least 1h, such as 1h, 1.5h, 2h etc., this
When vacuum degree reach 10^（-5）The order of magnitude, and the vacuum degree of this order of magnitude is kept, in this temperature and the vacuum degree order of magnitude
Lower heat preservation at least 2h, such as 2h, 2.5h, 3h etc.；Then proceed to be warming up to 500-580 DEG C, for example, 500 DEG C, 520 DEG C, 540 DEG C,
560 DEG C, 580 DEG C etc., heating-up time at least 2h, such as 2h, 2.5h, 3h etc., heating rate should not be too fast preferable at this time, is maintained at
10^（-6）The outgassing rate of the order of magnitude is preferable, cools down after keeping the temperature at least 3h at this temperature, such as 3h, 3.5h, 4h etc., so that
Material is fully deflated, until X-ray tube drops to room temperature, vacuum degree goes back up to 3.5-4.5 × 10^（-6）Pa is preferable；
Second step, first to the filament of X-ray tube be powered, electrical current 3.7A, make filament be warming up to 2000 degree and with
On, such as 2000 degree, 2100 degree, 2200 degree, 2300 degree etc., further degassing is carried out to filament；Then add in X-ray tube
40kV high pressures, adjustment heater current make tube current be 4mA, and vacuum degree can continue to reduce at this time, down to 2.5-3.5 × 10
^（-6）Pa, in X-ray tube plus 40kV high pressures and adjustment heater current make tube current be to keep at least 2.5h under this operating modes of 4mA,
Such as 2.5h, 3h, 3.5h etc., vacuum degree will go back up to 7.5-8.5 × 10^ this period（-7）pa；Subsequently high pressure is reduced
To 30kV, adjustment heater current makes tube current increase to 6mA, and at this moment increasing power can make vacuum degree be again decreased to 1.0-2.0
×10^（-6）Pa, high pressure drop make tube current increase under this operating modes of 6mA to keep at least as low as 30kV and adjustment heater current
2h, such as 2h, 2.5h, 3h etc., vacuum degree will go back up to 4.5-5.5 × 10^ this period（-7）pa；Later by high pressure drop as low as
20kV, adjustment heater current make tube current increase to 8mA, at this moment reduce power, increase tube current, gone to target surface deeper
Gas, vacuum degree, which has, at this time faint is reduced to 5.5-6.5 × 10^（-7）Pa, high pressure drop make pipe as low as 20kV and adjustment heater current
Electric current, which increases under this operating modes of 8 mA, keeps at least 0.5h, such as 0.5h, 0.7h, 0.9h etc., then by high pressure drop as low as 15kV
, so that tube current is continually maintained in 8mA, slowly reduce power at this time, make degassing more abundant, high pressure drop is as low as 15kV and makes pipe
Electric current is continually maintained under this operating modes of 8mA and keeps at least 0.5h, such as 0.5h, 0.7h, 0.9h etc.；High pressure is finally closed, waits for X
Ray tube is cooled to room temperature, and vacuum degree reaches 7.5-8.5 × 10^ at this time（-8）Pa, then will be taken out after the X-ray tube clamp；
Step 4, it is seasoned that the X-ray tube taken out to step 3 carries out oil pressure.
Above, voltage range ± 0.5%, current range ± 0.2%.
In above-mentioned steps 4, oil pressure is seasoned to be as follows：
Step 41,1h and within（Such as 0.4h, 0.5h, 0.6h, 0.8h, 1h etc.）The old of X-ray tube will be applied to
Practice voltage and be gradually increased to 190kV from 50 kV, the anode current of X-ray tube is maintained at 2mA, which is added in anode and cathode by high pressure
Between, make electrode surface local melting using the electric discharge of breakdown, tentatively eliminate burr so that the stress levels of X-ray tube are gradually
It improves；
Step 42, after completing step 41, X-ray tube is steady in the case where experienced voltage is 190kV, anode current is 2mA
Fixed work at least 2h, such as 2h, 2.5h, 3h etc., this step progress superpressure is seasoned, further eliminates the burr of X-ray tube so that X
The stress levels of ray tube further increase, and are further ensured that the stability that X-ray tube works long hours；
Step 43, after completing step 42, X-ray tube is steady in the case where experienced voltage is 175kV, anode current is 2mA
Fixed work at least 8h, such as 8h, 8.5h, 9h etc., this step simulates normal operating conditions, higher 15kV than real work, ensures just
Often stabilization when work；
Step 44, after completing step 43, X-ray tube is opened in the case where experienced voltage is 175kV, anode current is 2mA
It is at least 1000 times disconnected, specifically, opening high pressure, stablize at least 30s, close high pressure, recycles at least 1000 times, by cut-offfing this mode
Simulate a kind of low-frequency pulse voltage, to X-ray tube carry out it is a kind of profound level it is seasoned, be further ensured that X-ray tube long-time work
The stability of work；
Step 45, complete step 44 after, X-ray tube in the case where experienced voltage is 175kV, anode current is 2mA again
Steady operation at least 8h, such as 8h, 8.5h, 9h etc., this step simulate normal operating conditions again, so as to the performance of X-ray tube
Finally settle out.
Above-mentioned steps 42,43,44,45 step up the discharge probability of anode and cathode, X are made to penetrate by different pressuring methods
Spool obtain fully it is seasoned, to obtain relatively reliable job stability.As it can be seen that above-mentioned steps 41,42,43,44,45 are to each other
Cooperation eliminates the small inhomogeneities of negative and positive pole surface, can improve the stress levels of X-ray tube, ensures X-ray tube for a long time
The stability of work, and relatively reliable job stability can be obtained.
In above step 41-45, voltage range ± 0.5%, current range ± 0.05%.
Further include shape processing step between above-mentioned steps 3 and step 4.
It should be noted that each particular technique feature described in above-mentioned specific implementation mode, in reconcilable feelings
Under condition, it can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention is to various possible groups
Conjunction mode is not described.
Above with reference to embodiment to the present invention have been described in detail, it is illustrative rather than restrictive, is not taking off
From the change and modification under present general inventive concept, within protection scope of the present invention.
Claims (7)
1. a kind of X-ray tube, which is characterized in that including：
Ceramic shell comprising cavity, the cavity include that cylindrical first part, one end are connect with the first part one end
Interconnecting piece and the cylindrical second part that is connect with the other end of the interconnecting piece of one end, wherein the first part
Diameter is more than the diameter of the second part, which is connected smoothly the first part and the second part, the connection
Portion, the first and second part are coaxial；
Anode is set in the second part and coaxial with the ceramic shell；
Shielding case is set in the other end of the first part and coaxial with the ceramic shell；And
Cathode is set in the shielding case；
The shielding case include in the first circular ring, outer diameter be less than the first ring outer diameter in circular the second ring and
The connection ring that one end of first ring is connect with one end of second ring, wherein second ring is coaxial with first ring and court
To the anode.
2. X-ray tube according to claim 1, which is characterized in that between having between the anode and the ceramic shell
Gap.
3. X-ray tube according to claim 1, which is characterized in that further include opposite with first part positioned at ceramic shell
Answer the window for making thin formation by grinding of outer wall.
4. X-ray tube according to any one of claims 1 to 3, which is characterized in that further include being installed on the first part
The other end by binding post, the exhaust pipe edge of a knife, argon arc welding lid together in interior protective cover.
5. X-ray tube according to any one of claims 1 to 3, which is characterized in that further include connect with the anode dissipate
Hot device.
6. a kind of manufacturing method of X-ray tube, which is characterized in that include the following steps：
Step 1, X-ray tube described in any one of claim 1 to 5 is assembled；
Step 2, the X-ray tube assembled to step 1 vacuumizes, and is evacuated to vacuum degree and is at least 10^ (- 4) order of magnitude；
Step 3, gas exhaust treatment is carried out in two steps：
The first step, the X-ray tube after step 2 is vacuumized are placed in roasting plant, and the temperature of roasting plant is raised to from 0 DEG C
350-380 DEG C, heating-up time at least 1h, vacuum degree at this time reaches 10^ (- 5) order of magnitude, and keeps the true of this order of magnitude
Reciprocal of duty cycle keeps the temperature at least 2h at this temperature and the vacuum degree order of magnitude；It then proceedes to be warming up to 500-580 DEG C, the heating-up time is at least
2h cools down after keeping the temperature at least 3h at this temperature, until X-ray tube drops to room temperature；
Second step is first powered to the filament of X-ray tube, and electrical current 3.7A makes filament be warming up to 2000 degree or more, right
Filament carries out further degassing；Then add 40kV high pressures, adjustment heater current that tube current is made to be 4mA and keep in X-ray tube
At least 2.5h；Subsequently so that tube current is increased to 6mA as low as 30kV adjustment heater currents high pressure drop and keeps at least 2h；Later
By high pressure drop as low as 20kV, adjustment heater current makes tube current increase to 8mA and keeps at least 0.5h, then by high pressure drop as low as
15kV makes tube current be continually maintained in 8mA and keeps at least 0.5h；High pressure is finally closed, it will after X-ray tube is cooled to room temperature
It is taken out after X-ray tube clamp；
Step 4, it is seasoned that the X-ray tube taken out to step 3 carries out oil pressure；
In step 3, voltage range ± 0.5%, current range ± 0.2%.
7. the manufacturing method of X-ray tube according to claim 6, which is characterized in that in the step 4, oil pressure is seasoned
It is as follows：
Step 41,1h and within the experienced voltage for being applied to X-ray tube is gradually increased to 190kV, the sun of X-ray tube from 50kV
Electrode current is maintained at 2mA；
Step 42, after completing step 41, X-ray tube stablizes work in the case where experienced voltage is 190kV, anode current is 2mA
Make at least 2h；
Step 43, after completing step 42, X-ray tube stablizes work in the case where experienced voltage is 175kV, anode current is 2mA
Make at least 8h；
Step 44, complete step 43 after, X-ray tube cut-off in the case where experienced voltage is 175kV, anode current is 2mA to
It is 1000 times few；
Step 45, after completing step 44, X-ray tube is stablized again in the case where experienced voltage is 175kV, anode current is 2mA
Work at least 8h；
In step 41-45, voltage range ± 0.5%, current range ± 0.05%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022070098A1 (en) * | 2020-09-30 | 2022-04-07 | Ncx Corporation | Field emission x-ray tube assembly and a method of making same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021095298A1 (en) * | 2019-11-11 | 2021-05-20 | キヤノン電子管デバイス株式会社 | X-ray tube and method for manufacturing x-ray tube |
| CN115206755A (en) * | 2021-04-14 | 2022-10-18 | 上海超群检测科技股份有限公司 | X-ray tube with self-shielding function and manufacturing method thereof |
| CN116741607B (en) * | 2023-07-20 | 2024-01-30 | 上海超群检测科技股份有限公司 | Anti-sparking cathode assembly and X-ray tube |
| CN116978762B (en) * | 2023-09-22 | 2023-11-24 | 上海超群检测科技股份有限公司 | Pocket welding method for anode assembly |
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| CN101834108B (en) * | 2009-03-11 | 2011-11-30 | 公安部第一研究所 | X-ray tube for emission in carbon nanometer cathode field |
| CN104889519B (en) * | 2015-04-24 | 2016-04-13 | 黄石上方检测设备有限公司 | A kind of manufacture method of metal-ceramic X-ray tube |
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| JP2004507042A (en) * | 2000-08-14 | 2004-03-04 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Rotating anode with small shielding arrangement |
| CN202145446U (en) * | 2011-07-06 | 2012-02-15 | 湖北盛达探伤机械有限公司 | X ray ceramic tube with thermoelectric shielding case |
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| WO2022070098A1 (en) * | 2020-09-30 | 2022-04-07 | Ncx Corporation | Field emission x-ray tube assembly and a method of making same |
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Effective date of registration: 20211217 Address after: 610000 floor 1, building 3, No. 99, Huanghe Road, Xindu street, Xindu District, Chengdu, Sichuan Patentee after: Chengdu kaisaier Technology Co.,Ltd. Address before: No. 99, Huanghe Road, Xindu Industrial East District, Chengdu, Sichuan 610500 Patentee before: CHENGDU KAISAIER ELECTRONICS Co.,Ltd. |