CN100357720C - Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system - Google Patents
Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system Download PDFInfo
- Publication number
- CN100357720C CN100357720C CNB2003101043044A CN200310104304A CN100357720C CN 100357720 C CN100357720 C CN 100357720C CN B2003101043044 A CNB2003101043044 A CN B2003101043044A CN 200310104304 A CN200310104304 A CN 200310104304A CN 100357720 C CN100357720 C CN 100357720C
- Authority
- CN
- China
- Prior art keywords
- laser
- liquid pool
- voltage
- platinum resistance
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001052 transient effect Effects 0.000 title claims description 5
- 239000000126 substance Substances 0.000 title abstract description 8
- 238000009529 body temperature measurement Methods 0.000 title abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010892 electric spark Methods 0.000 claims abstract description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000009835 boiling Methods 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000002360 explosive Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 241000566711 Buphthalmum Species 0.000 claims description 4
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 238000004093 laser heating Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003760 hair shine Effects 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 claims description 2
- 230000000541 pulsatile effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- -1 platino gold Chemical compound 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002887 superconductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Abstract
The present invention relates to a system for observing low-temperature liquid working substance transience temperature measurement and the growth process of bubbles, which comprises a liquid pool, a platinum resistor, a signal conversion device, a digital oscillograph, a computer, a pulse laser, a laser control table, an observing and shooting system, wherein a base bottom for plating the platinum resistor is arranged in the liquid pool; both side walls of the liquid pool are respectively provided with a circular observing window along the diameter direction; a platinum resistor is arranged in the liquid pool, and is formed by that one end surface of a silica glass post is plated with a layer of platino gold; both sides of the quartz glass post are coated with silver slurry as conductor leads; the signal converter makes the resistance signals of the platinum resistor converted into voltage signals; the digital oscillograph is connected with the signal converter; the computer makes voltage variation signals recorded by the digital oscilloscope converted into temperature signals; the pulse laser generates laser which are irradiated on the surface of the platinum resistor; the laser control table is used for controlling and regulating the output parameters of the laser; the observing and shooting system is composed of a micro-macrophotograph system and a high-voltage electric spark light source, wherein the lens of the micro-macrophotograph, and the high-voltage electric spark light source are respectively arranged on both sides of the liquid pool, and correspond to the circular windows on both sides of the liquid pool.
Description
Technical field
The present invention relates to a kind of measurement of liquid working substance transient temperature and bubble growth process observing system under low temperature environment.
The invention still further relates to a kind of method of utilizing said apparatus to observe.
Background technology
Superconductor has progressed into the practicability stage aspect a lot, as superconduction generating, superconductive power transmission, magnetic suspension train, nmr imaging technique, superconducting integrated circuit chip technology or the like.In superconductor work, its residing low temperature environment (liquid nitrogen, liquid helium) might be subjected to the impact of instantaneous high hot-fluid, makes it produce very high temperature rise rate, thereby causes the generation of explosive boiling, even have influence on safety, the steady operation of superconductor.The bubble growth process of low temperature explosive boiling is very fast, and quantity is a lot, is difficult to observe the growth course and corresponding temperature variation of bubble under this fluidized state with conventional way.
Summary of the invention
The object of the present invention is to provide a kind of about measurement of cryogenic liquid working medium (liquid nitrogen) transient temperature and bubble growth process observing system.
For achieving the above object, set of systems provided by the invention becomes:
One fills the liquid pool of cryogenic liquid, adopts inside and outside two-layer stainless steel pipe box envelope to form, and is vacuum state between the inside and outside two-layer steel pipe.For keeping inner vacuum constant, be placed with acticarbon between two interlayers.Also wrap up one deck aluminium foil between the two-layer steel pipe, thus the more effective radiation leakage thermal loss that prevents.Be provided with the base of laying platinum resistance in the liquid pool.On the two sides of liquid pool, along diametric(al) an ox-eye is set respectively respectively, use for shooting and electric spark light illumination.
One platinum resistance is placed in the liquid pool, is that plating one deck platinum forms on an end face of quartz glass cylinder, and the both sides of quartz glass cylinder scribble the silver slurry as conductor leading.
One signal converter is converted to voltage signal with the resistance signal of platinum resistance.
One digital oscilloscope is connected with signal converter, with the voltage change signal of platinum resistance under the recording impulse laser radiation.
One computing machine, the voltage change signal that digital oscilloscope is write down is converted to temperature signal.
One pulsed laser produces a laser radiation in the platinum resistance surface.
One laser instrument control desk is used for control and regulates laser output parameters.
One observes and camera chain, is made up of micro-macrophotography system, high-voltage spark light source, and the camera lens and the high-tension electricity flame source of wherein micro-macrophotography system are separately positioned on the liquid pool both sides, and corresponding with the ox-eye of liquid pool both sides.
One high-voltage spark is controlled chronotron, is used to control the flash of light time delay of high tension spark light source.
When utilizing said apparatus to observe, on the laser instrument control desk, set laser output parameters, control laser output parameters, and on high-voltage spark control lag device, set the time delay of glistening by the laser instrument control desk.Because optical maser wavelength of the present invention is 1.06 μ m, the The working fluid liquid nitrogen absorbs hardly to laser under this wavelength, laser passes the surface that low temperature (liquid nitrogen) working medium shines directly into platinum film resistor, wherein most of energy is reflected by the metal electron on platinum film surface, the small part energy is used to heat platinum resistance, platinum resistance heats liquid working substance after being heated and heating up, so platinum-membrane resistor is a temperature element is again the heating element of liquid working substance, directly the temperature variation of measurement itself lags behind thereby eliminated to measure.The resistance of platinum-membrane resistor is a certain value under the normal temperature, its resistance changes with the variation of platinum film surface temperature under pulsed laser action, thereby the voltage at its two ends is also changed thereupon, write down the variation course of its voltage by digital oscilloscope, again by voltage and temperature according to becoming the temperature variation that relation can obtain platinum film surface (also promptly with its liquid working substance that closely contacts).In laser instrument output laser, send two tunnel trigger pips, the temperature variation signal of one tunnel triggered digital oscillograph recording platinum resistance, another road is triggered the high-voltage spark device and is caused flash of light according to preset delay time, this moment, camera was in T door (indoor is the darkroom), rollfilm exposes because of the electric spark flash of light, thereby finishes the shooting and the temperature survey of liquid working substance explosive boiling under the paired pulses laser radiation.Under the metastable situation of experiment condition, with once under pulse laser heating the super overall process of boiling rapidly be divided into apart from laser radiation zero-time different constantly (realizing time delay) and carry out single shot by the flash of light that changes high-voltage spark, then with the super overall process of boiling rapidly of the serial-gram reflection of taking successively.
The temperature survey that the present invention can be widely used under low temperature (liquid nitrogen) environment super boiling rapidly is with the observation of bubble growth dynamic process and take pictures.
Description of drawings
Fig. 1 is a system and device synoptic diagram of the present invention.
Fig. 2 is the synoptic diagram of platinum resistance.
Fig. 3 is the serial-gram of the liquid nitrogen explosive boiling of the present invention's shooting.
Embodiment
The system that the present invention adopts as shown in Figure 1.The thermal source of present embodiment is a high strength NdYAG programmable pulse laser instrument 1, and its wavelength is 1.06 μ m, and pulse width is 1～30 μ s, and spot diameter is 1～10mm, and the power density of pulsatile once reaches as high as 1.0 * 10
4MW/m
2, regulate laser output parameters by laser controlling platform 2 (PC486 computing machine) control switching.Platinum resistance 3 (as shown in Figure 2) is to plate the platinum 12 that a layer thickness is about 1 μ m with vacuum coating equipment to form on an end face of quartz glass cylinder 11, and the both sides of quartz glass cylinder scribble the silver slurry as conductor leading 13.In the test process, platinum resistance 3 is immersed in the liquid pool 4 that fills cryogenic liquid.Low temperature liquid pool 4 adopts inside and outside two-layer stainless steel pipe box envelope to form, and adopts the means of bleeding to be set at vacuum state between the inside and outside two-layer steel pipe, and vacuum tightness is approximately 0.96atm.And place acticarbon to keep inner vacuum constant.Also wrap up one deck aluminium foil between the two-layer steel pipe, thus the more effective radiation leakage thermal loss that prevents.The liquid pool internal volume is about 1 liter, and is provided with the base of laying test specimen.On the side of liquid pool, be provided with two circular view windows along diametric(al), its effective visual diameter is 28cm, can use for shooting and electric spark light illumination fully.The resistance variations signal on test specimen surface is converted to voltage signal by signal converter 10 under the pulsed laser irradiation, uses 8 passage digital oscilloscope 5 (DL2700) records again, and its acquisition rate is 500MS/s, is converted to temperature signal by computing machine 6 again.Observe with camera chain and form by micro-macrophotography system 7 (Nikon SMZ-2T type stereo microscope and 135 Nikon cameras), high-voltage spark light source 8, the charging voltage of high-voltage spark flasher is 18～20KV, duration of charging is 50s-60s, and discharge (exposure) time is less than 0.5 μ s.
In the test process, on laser instrument control desk 2, set earlier the output parameter of laser instrument 1, control laser output parameters by control desk, and on high-voltage spark control lag device 9, set the time delay of glistening, in laser instrument output laser, send two tunnel trigger pips, the temperature variation signal of one tunnel triggered digital oscillograph, 5 record platinum resistance, another road is triggered high-voltage spark light source 8 and is caused the flash of light of 0.5 μ s according to preset delay time, this moment, camera was in T door (indoor is the darkroom), rollfilm (ISO1600 Kodak colour film) exposes because of the electric spark flash of light, thereby finishes the shooting and the temperature survey of liquid working substance explosive boiling under the paired pulses laser radiation.Under the metastable situation of experiment condition, with once under pulse laser heating the super overall process of boiling rapidly be divided into apart from laser radiation zero-time different constantly (realizing time delay) and carry out single shot by the flash of light that changes high-voltage spark, then with the super overall process of boiling rapidly of the serial-gram reflection of taking successively (in 1～10000 μ s time period that laser instrument begins to shine).According to the method described above, with system of the present invention at heat flow density 600MW/m
2, under the pulse hot-fluid effect of pulsewidth 5 μ s, the serial-gram of the liquid nitrogen explosive boiling of taking constantly in difference as shown in Figure 3.
Claims (8)
1, a kind of cryogenic liquid working medium transient temperature is measured and the bubble growth process observing system, and it includes:
The liquid pool of one splendid attire cryogenic liquid for inside and outside two-layer stainless steel pipe box envelope forms, is a vacuum state between the inside and outside two-layer steel pipe; Be provided with the base of laying platinum resistance in the liquid pool; On the two sides of liquid pool, an ox-eye respectively is set respectively, uses for shooting and electric spark light illumination along diametric(al);
One platinum resistance is placed in the liquid pool, is that plating one deck platinum forms on an end face of quartz glass cylinder, and the both sides of quartz glass cylinder scribble the silver slurry as conductor leading;
One signal converter is converted to voltage signal with the resistance signal of platinum resistance;
One digital oscilloscope is connected with signal converter, with the voltage change signal of platinum resistance under the recording impulse laser radiation;
One computing machine, the voltage change signal that digital oscilloscope is write down is converted to temperature signal;
One pulsed laser produces a laser radiation in the platinum resistance surface, and its Wavelength of Laser is 1.06 μ m;
One laser instrument control desk is used for control and regulates laser output parameters;
One observes and camera chain, is made up of micro-macrophotography system, high-voltage spark light source, and the camera lens and the high-tension electricity flame source of wherein micro-macrophotography system are separately positioned on the liquid pool both sides, and corresponding with the ox-eye of liquid pool both sides;
One high-voltage spark is controlled chronotron, is used to control the flash of light time delay of high tension spark light source;
Above-mentioned pulsed laser sends two tunnel trigger pips when exporting laser, the temperature variation signal of one tunnel triggered digital oscillograph recording platinum resistance, and another road is triggered high-voltage spark light source and is caused flash of light according to preset delay time.
2, the system as claimed in claim 1 is characterized in that, described cryogenic liquid is a liquid nitrogen..
3, the system as claimed in claim 1 is characterized in that, the inside and outside vacuum tightness between two-layer of liquid pool is 0.96atm.
4, the system as claimed in claim 1 is characterized in that, is placed with acticarbon between inside and outside two interlayers of liquid pool, to keep inner vacuum constant.
5, the system as claimed in claim 1 is characterized in that, also wraps up one deck aluminium foil between the two-layer steel pipe of liquid pool, leaks thermal loss to prevent radiation.
6, the system as claimed in claim 1 is characterized in that, the pulse width of described laser instrument is 1-30 μ s, and spot diameter is 1-10mm, and the power density of pulsatile once is 10 * 10 to the maximum
4MW/m
2
7, the system as claimed in claim 1 is characterized in that, the charging voltage of described high-voltage spark light source is 18-20KV, and the duration of charging is 50-60s, and discharge time is less than 0.5 μ s.
8, a kind ofly utilize the method that each described system is observed in the aforesaid right requirement, the steps include:
A) on the laser instrument control desk, set laser output parameters, control laser output parameters by the laser instrument control desk;
B) on high-voltage spark control lag device, set the time delay of glistening;
C) laser is passed the surface that cryogenic liquid shines directly into platinum resistance, platinum resistance is heated heats up and then cryogenic liquid is heated;
D) write down the change in voltage of platinum resistance by digital oscilloscope, again by voltage and temperature according to becoming the temperature variation that relation obtains cryogenic liquid working medium;
When e) the high-voltage spark light source caused flash of light, camera was in the T door, finishes the shooting and the temperature survey of cryogenic liquid working medium explosive boiling under the paired pulses laser radiation;
F) the flash of light time delay by changing high-voltage spark will be once under the pulse laser heating the super overall process of boiling rapidly be divided into apart from the different single shot of constantly carrying out of laser radiation zero-time, then with the super overall process of boiling rapidly of the serial-gram reflection of taking successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101043044A CN100357720C (en) | 2003-10-24 | 2003-10-24 | Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101043044A CN100357720C (en) | 2003-10-24 | 2003-10-24 | Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1609572A CN1609572A (en) | 2005-04-27 |
| CN100357720C true CN100357720C (en) | 2007-12-26 |
Family
ID=34756961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101043044A Expired - Fee Related CN100357720C (en) | 2003-10-24 | 2003-10-24 | Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100357720C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324533B (en) * | 2007-06-13 | 2011-07-20 | 中国科学院工程热物理研究所 | System for observing and measuring multiphase system microjet phase-change energy mass transfer course |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382961A (en) * | 2001-04-27 | 2002-12-04 | 中国科学院工程热物理研究所 | Transient temp measuring system and method in ultrahigh-speed heat transfer condition |
| US6509070B1 (en) * | 2000-09-22 | 2003-01-21 | The United States Of America As Represented By The Secretary Of The Air Force | Laser ablation, low temperature-fabricated yttria-stabilized zirconia oriented films |
| JP2003063824A (en) * | 2001-08-28 | 2003-03-05 | Yamanashi Tlo:Kk | Method for manufacturing nondense and dense double layer structure of oxide high temperature superconductor and oxide high temperature superconductor |
-
2003
- 2003-10-24 CN CNB2003101043044A patent/CN100357720C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509070B1 (en) * | 2000-09-22 | 2003-01-21 | The United States Of America As Represented By The Secretary Of The Air Force | Laser ablation, low temperature-fabricated yttria-stabilized zirconia oriented films |
| CN1382961A (en) * | 2001-04-27 | 2002-12-04 | 中国科学院工程热物理研究所 | Transient temp measuring system and method in ultrahigh-speed heat transfer condition |
| JP2003063824A (en) * | 2001-08-28 | 2003-03-05 | Yamanashi Tlo:Kk | Method for manufacturing nondense and dense double layer structure of oxide high temperature superconductor and oxide high temperature superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1609572A (en) | 2005-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kunchur | Novel transport behavior found in the dissipative regime of superconductors | |
| Gathers et al. | Improved apparatus for thermophysical measurements on liquid metals up to 8000 K | |
| Villagran-Muniz et al. | Shadowgraphy and interferometry using a CW laser and a CCD of a laser-induced plasma in atmospheric air | |
| Bhat et al. | Role of macrolayer evaporation in pool boiling at high heat flux | |
| Thomas et al. | Observations of the morphology of laser‐induced damage in copper mirrors | |
| Frenz et al. | Starting mechanisms and dynamics of bubble formation induced by a Ho: Yttrium aluminum garnet laser in water | |
| Landen et al. | Dynamics of picosecond-laser-pulse plasmas determined from the spectral shifts of reflected probe pulses | |
| Malozemoff et al. | Ballistic overshoot in the gradient propagation of bubbles in garnet films | |
| CN100357720C (en) | Cryogenic liquid working substance transient temperature measurement and bubble growing process observation system | |
| Kelley et al. | Measurement of partial discharges in Hexane under dc voltage | |
| Kryder et al. | A Nanosecond Kerr Magneto‐Optic Camera | |
| Porteus et al. | Pulsed laser-induced melting of precision diamond-machined Cu, Ag, and Au at infrared wavelengths | |
| Shi et al. | Picosecond photoresponse in Y-Ba-Cu-O ultrathin films | |
| Bostanjoglo et al. | High‐speed electron microscopy of laser‐induced vaporization of thin films | |
| Offenberger et al. | Experimental results for high intensity KrF laser/plasma interaction | |
| CN1466015A (en) | Transient observation system and method for bubble growth process under superfast boiling state | |
| Reintjes et al. | Interferometric study of laser‐produced plasmas | |
| Allan et al. | Post-arc temperature decay | |
| Lindholm et al. | Transient heat conduction at high thermal flux | |
| Gyuráki | Fluorescent thermal imaging method for investigating transient effects in high-temperature superconductor tapes and coils | |
| Porro et al. | Development of a laser-induced heat flux technique for measurement of convective heat transfer coefficients in a supersonic flowfield | |
| Groeneweg et al. | Fluorescent photography of droplets in a spray using a Q-switched laser as a light source | |
| Hogan | Applications of copper vapor laser lighting in high-speed motion analysis | |
| McAlister | A pulse-forming network for particle path visualization | |
| Nolting et al. | Cold X-ray simulation technology development at Phoenix |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170824 Address after: 100080 No. 15, No. three, Zhongguancun Road, Haidian District, Beijing, No. seventy-fifth, 106 Patentee after: BEIJING ZHONGKE ZHONGNENG TECHNOLOGY CO., LTD. Address before: 100080 No. 12, Zhongguancun Road, Beijing, Haidian District Patentee before: Institute of Engineering Thermophysics, Chinese Academy of Sciences |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20171227 Address after: R & D center 9 No. 421000 Hunan province Hengyang City Baishazhou Industrial Park, Yanfeng District Industrial Avenue, room 512 Patentee after: Hengyang Zhongke green nurseries Technology Co., Ltd. Address before: 100080 No. 15, No. three, Zhongguancun Road, Haidian District, Beijing, No. seventy-fifth, 106 Patentee before: BEIJING ZHONGKE ZHONGNENG TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181114 Address after: 100083 C-1606-22, Building 1, 18 Zhongguancun East Road, Haidian District, Beijing Patentee after: Zhongke micro groove group (Beijing) energy saving Technology Development Co., Ltd. Address before: Room 512, R&D Center, No. 9 Industrial Avenue, Baishazhou Industrial Park, Yanfeng District, Hengyang City, Hunan Province Patentee before: Hengyang Zhongke green nurseries Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071226 Termination date: 20191024 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |