CN203585801U - High-vacuum heat-insulation low-temperature vessel - Google Patents
High-vacuum heat-insulation low-temperature vessel Download PDFInfo
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- CN203585801U CN203585801U CN201320763938.XU CN201320763938U CN203585801U CN 203585801 U CN203585801 U CN 203585801U CN 201320763938 U CN201320763938 U CN 201320763938U CN 203585801 U CN203585801 U CN 203585801U
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- temperature
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- shell
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- 238000009413 insulation Methods 0.000 title claims abstract description 21
- 239000001257 hydrogen Substances 0.000 claims abstract description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 30
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000003463 adsorbent Substances 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 239000010410 layer Substances 0.000 claims description 33
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 239000002808 molecular sieve Substances 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract 4
- 230000000149 penetrating effect Effects 0.000 abstract 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 12
- 229910003445 palladium oxide Inorganic materials 0.000 description 12
- JQPTYAILLJKUCY-UHFFFAOYSA-N palladium(ii) oxide Chemical compound [O-2].[Pd+2] JQPTYAILLJKUCY-UHFFFAOYSA-N 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 229960004643 cupric oxide Drugs 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002594 sorbent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Thermal Insulation (AREA)
Abstract
The utility model discloses a high-vacuum heat-insulation low-temperature vessel. The high-vacuum heat-insulation low-temperature vessel comprises a liner and a shell, wherein hydrogen is filled in a vacuum layer formed by a sandwich layer between the liner and the shell, and the high-vacuum heat-insulation low-temperature vessel also comprises a normal-temperature adsorption device which is arranged on the upper part of the shell in a penetrating manner, the normal-temperature adsorption device is arranged in a closing manner and communicated with the vacuum layer, and dehydrogenation catalyst is filled in the normal-temperature adsorption device. By adopting the normal-temperature adsorption device, the high-temperature operation is not needed when the high-vacuum heat-insulation low-temperature vessel is used at a normal state; the normal-temperature adsorption device is arranged on the shell and filled with the dehydrogenation catalyst, the dehydrogenation catalyst can catalyze the reaction of the hydrogen and oxygen to generate water, and the moisture can be absorbed, the dehydrogenation catalyst can be reutilized after the moisture is removed when in maintenance, and the vacuum is unnecessary to destroy.
Description
Technical field
The utility model relates to high-vacuum insulation low-temperature (low temperature) vessel, especially relevant with the structure of adsorbing the hydrogen in vacuum layer in high-vacuum insulation low-temperature (low temperature) vessel.
Background technique
High-vacuum insulation low-temperature (low temperature) vessel is generally comprised of shell (carbon steel, stainless steel), stainless inner bag, reflecting material (two-sided aluminizer) and thermoinsulation material (glass fiber paper).Cryogenic vacuum container is usually used in loading the cryogenic liquides such as LNG Liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, when storing or transporting above-mentioned cryogenic liquide, this Low Temperature Liquid is known from experience because of the progressively evaporation of being heated, and for extending cryogenic liquide mark state, holds time, and needs to maintain the degree of vacuum of vacuum layer.The metal wall of inner bag and shell, reflecting material, thermoinsulation material can volatilize a small amount of gas (H
2, N
2, O
2, CO
2, H
2o etc.), through long time integration, can have a strong impact on the degree of vacuum of vacuum layer, thereby reduce the insulation effect of vacuum layer, affect product performance.
At present, conventionally on wall, cryogenic absorption device is set outside the tank, built-in low temperature adsorbent.This low temperature adsorbent can absorb a small amount of impurity and moisture, but cannot absorb hydrogen, and hydrogen exists to be affected very large on degree of vacuum, product performance.For solving the hydrogen adsorption problem in vacuum sandwich, conduct in-depth research in the industry.At present general method is in vacuum layer, to fill palladium oxide, hang and be fixed on shell inner side, this palladium oxide can with hydrogen generation chemical reaction, generate water and palladium, the water of generation absorbs by cryogenic absorption device.But use palladium oxide also to there is defect: because chemical reaction has occurred for palladium oxide and hydrogen, and this chemical reaction is irreversible, and therefore palladium oxide can only disposablely be used, and cannot reuse.For reaching using effect, need to regularly replace palladium oxide.Changing the cycle of palladium oxide determines according to actual needs, conventionally make placed palladium oxide during the vacuum life of cryogenic vacuum container, work, when arriving the cryogenic vacuum container vacuum life limit, when vacuum need to be repaired, must change palladium oxide simultaneously.No matter the replacement cycle of palladium oxide is how many, and disposable due to its use increases the maintenance cost of the vacuum life of cryogenic vacuum container greatly.Palladium oxide is unstable in oxygen-enriched environment, and large-scale gas companies clearly stipulates that oxygen car must not adopt palladium oxide as inhaling hydrogen agent, now needs to inhale hydrogen alternative.In addition, also have and adopt cupric oxide as the sorbent of hydrogen, cupric oxide and hydrogen generation chemical reaction generation copper and water, and water adsorbs by cryogenic absorption device.Cupric oxide can only carry out with reacting of hydrogen under high-temperature heating, and cannot adsorb hydrogen under normal temperature state in the using process of cryogenic vacuum container, can only be finding to heat reactive absorption hydrogen to it when vacuum condition is not very good.And cupric oxide also cannot regeneration, if will refill same need, break vacuum layer, again vacuumize, use cupric oxide to safeguard that the cost of cryogenic vacuum container vacuum is equally very large.
Model utility content
For problems of the prior art, the purpose of this utility model for provide a kind of have can reuse and without the normal temperature adsorbent equipment of vacuum breaker, and simple in structure, easy operating, high-vacuum insulation low-temperature (low temperature) vessel that maintenance cost is cheap.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of high-vacuum insulation low-temperature (low temperature) vessel, comprise inner bag and shell, the vacuum layer that between described inner bag and shell, interlayer forms contains hydrogen, also comprise and run through the normal temperature adsorbent equipment that is arranged on described shell upper, the airtight setting of described normal temperature adsorbent equipment, and be communicated with described vacuum layer, in described normal temperature adsorbent equipment, be filled with dehydrogenation.
Further, described dehydrogenation is silver-colored molecular sieve, and described silver-colored molecular sieve is seated in glass yarn cloth bag.
Further, described normal temperature adsorbent equipment comprises the steel pipe being weldingly fixed on described shell, and described steel pipe upper end welding shrouding seals, and lower end is set with steel wire.
Further, described steel pipe is positioned on the outer peripheral surface of described vacuum layer and is processed with groove, and described steel wire coordinates the fixation with steel wire of described groove in the lower end of described steel pipe by clip.
Further, described inner bag is positioned on the outer wall of described vacuum layer and is also provided with cryogenic absorption device.
Further, on described normal temperature adsorbent equipment outer wall, be provided with Portable movable heating equipment.
The beneficial effects of the utility model are, the utility model compared with prior art, the utility model adopts normal temperature adsorbent equipment, normal state use time without high-temperature operation, normal temperature adsorbent equipment is arranged on shell, and wherein fill dehydrogenation, dehydrogenation can hydrogen catalyzedly react with oxygen element, generate water, and can absorb moisture, when safeguarding, can remove wherein and reuse after moisture, without vacuum breaker, maintenance cost reduces greatly, there is very strong economic benefit, the utility model is simple in structure, easy operating, be conducive to promote the use of.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the structural representation of high-vacuum insulation low-temperature (low temperature) vessel of the present utility model;
Fig. 2 is the structural representation of normal temperature adsorbent equipment in high-vacuum insulation low-temperature (low temperature) vessel of the present utility model.
Embodiment
The exemplary embodiments that embodies the utility model feature & benefits will describe in detail in the following description.Be understood that the utility model can have various variations in different embodiments, it neither departs from scope of the present utility model, and explanation wherein and accompanying drawing be when the use that explain in itself, but not in order to limit the utility model.
High-vacuum insulation low-temperature (low temperature) vessel of the present utility model, structure as shown in Figure 1, comprise inner bag 1 and shell 2, among inner bag 1, load the cryogenic liquides such as LNG Liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, interlayer between inner bag 1 and shell 2 vacuumizes, form vacuum layer 3, in this vacuum layer 3, be filled with thermoinsulation material (not shown).In this vacuum layer 3, because inner bag 1 is known from experience and volatilized the gases such as moisture and nitrogen, hydrogen with the metallic walls of shell 2, and the thermoinsulation material of filling in vacuum layer 3 etc. also can volatilize the impurity such as nitrogen and hydrogen.
For moisture and the nitrogen of absorption in vacuum layer 3, inner bag 1 is positioned on the outer wall of vacuum layer 3 and is also provided with cryogenic absorption device (not shown), and this cryogenic absorption device can comprise the materials such as active carbon, but it cannot adsorb the hydrogen in vacuum layer 3.
For the hydrogen in absorption vacuum layer 3, the utility model is provided with normal temperature adsorbent equipment 6, and this normal temperature adsorbent equipment 6 runs through the top that is arranged on shell 2, and quantity can be one, two or more.The airtight setting of normal temperature adsorbent equipment 6, and be communicated with vacuum layer 3, in normal temperature adsorbent equipment 6, being filled with dehydrogenation 8 these dehydrogenations 8 is silver-colored molecular sieve (AgX) in the present embodiment.
Normal temperature adsorbent equipment 6 can adopt cylinder or other structures, and the structure of the normal temperature adsorbent equipment 6 in the present embodiment as shown in Figure 2.Normal temperature adsorbent equipment 6 comprises a steel pipe 61, and this steel pipe 61 is weldingly fixed on shell 2 tops, welds a shrouding 62 and seal on the upper-end surface of steel pipe 61, and lower end is set with steel wire 63.Steel pipe 61 is positioned on the outer peripheral surface of vacuum layer 3 and is processed with groove, and steel wire 63 is fixed on the lower end of steel pipe 61 by the steel wire 64 of clip fit.Dehydrogenation 8(AgX) be seated in glass yarn cloth bag 65, this glass yarn cloth bag 65 is sleeved in the space that steel pipe 61, shrouding 65 and steel wire 63 form.The structure of steel wire 63 and glass yarn cloth bag 65 makes dehydrogenation 8(AgX) can not come off enters vacuum layer 3 inner bottom parts, and can facilitate hydrogen to enter wherein.
During actual fabrication normal temperature adsorbent equipment 6, intercept one section of steel pipe 61, in steel pipe 61 one end, near afterbody, open an annular groove, circular plate (the being shrouding 62) welded seal that the other end matches with steel pipe 61 with one, by dehydrogenation 8(AgX) with glass yarn cloth bag 65, wrap up and pack in steel pipe 61, finally with steel wire 63, cover 2～4 layers of steel pipe 61 openings, finally with φ 2～φ 5 steel wires 64, steel wire 63 is tightened along the groove on steel pipe 61, is prevented steel wire 63 and dehydrogenation 8(AgX) come off.
During welding assembly, after low temperature tank body (being inner bag 1) is all manufactured, on shell 2, open in advance a hole that is greater than normal temperature adsorbent equipment 6 external diameter 1～3mm, normal temperature adsorbent equipment 6 openings are stretched in shell 2 perforates, along normal temperature adsorbent equipment 6 is peripheral, weld with shell 2, the interlayer between normal temperature adsorbent equipment 6 inside and shell 2 and inner bag 1 forms a whole Seal cage; After hunting leak, sealing chamber is vacuumized, finally form vacuum layer 3.
During actual use, the hydrogen producing enters in normal temperature adsorbent equipment 6 via vacuum layer 3, at dehydrogenation 8(AgX) catalysis under react with oxygen element (metal wall and thermoinsulation material etc. all can produce oxygen element) wherein, generate water and be also adsorbed on dehydrogenation 8(AgX) in.This process, without heating, can be carried out under normal temperature state, therefore when cryogenic vacuum container normal operating condition, can carry out the absorption of hydrogen.
In addition, on normal temperature adsorbent equipment 6 outer walls, be provided with heating equipment 66, this heating equipment 66 can be electric heating wire or other heating arrangement easily.Arrive the cryogenic vacuum container vacuum life limit, when need to repair vacuum, use this heating equipment 66 to heat normal temperature adsorbent equipment 6, make dehydrogenation 8(AgX) in deviate from water and hydrogen, dehydrogenation 8(AgX) in finally become dry, can again use, to adsorb the hydrogen in vacuum layer.Dehydrogenation 8(AgX) hydrogen－sucking amount is greater than the sorbent of general routine, more than four hours, can reach the object reactivating after saturated at heat drying.
When vacuum layer 3 is vacuumized, heating equipment 66 is enclosed within on normal temperature adsorbent equipment 6, heating-up temperature is set to dehydrogenation 8(AgX) activation temperature, now dehydrogenation 8(AgX) at the hydrogen partial of former absorption, through heating, again evaporate, then through vacuum pumping technology, the hydrogen evaporating is extracted out outside vacuum layer, this just makes cryogenic vacuum container use is in actual use the dehydrogenation 8(AgX of bone dry), the time that the degree of vacuum of vacuum layer 3 maintains is like this also just more permanent.If cryogenic vacuum container is used to after several years, vacuum effectiveness is undesirable, while again vacuumizing, can carry out limit heating edge by above-mentioned steps equally and vacuumize, and reaches the effect of originally dispatching from the factory.
The beneficial effects of the utility model are, the utility model compared with prior art, the utility model adopts normal temperature adsorbent equipment 6, can adsorb at normal temperatures, and without at high temperature just reacting as cupric oxide, normal temperature adsorbent equipment 6 is arranged on shell 2, and wherein fill dehydrogenation 8(AgX), dehydrogenation 8(AgX) can hydrogen catalyzedly react with oxygen element, generate water, and can absorb moisture, when safeguarding, device outside adds portable pipe heater (removing after activation) and can remove wherein and reuse after moisture, and without vacuum breaker, maintenance cost reduces greatly, there is very strong economic benefit, and, the utility model is simple in structure, easy operating, be conducive to promote the use of.
In the utility model, normal temperature adsorbent equipment 6 is simple in structure, easy for installation, in addition dehydrogenation 8(AgX) low price, cost-saved, and need not break sky and can recycle, thereby reach the condition of high vacuum degree that keeps cryogenic vacuum container vacuum layer 3.
The technical solution of the utility model is disclosed as above by preferred embodiment.Those skilled in the art should recognize change and the retouching in the case of not departing from, the scope and spirit of the present utility model that the appended claim of the utility model discloses, done, within all belonging to the protection domain of claim of the present utility model.
Claims (6)
1. a high-vacuum insulation low-temperature (low temperature) vessel, comprise inner bag and shell, the vacuum layer that between described inner bag and shell, interlayer forms contains hydrogen, it is characterized in that, also comprise and run through the normal temperature adsorbent equipment that is arranged on described shell upper, the airtight setting of described normal temperature adsorbent equipment, and be communicated with described vacuum layer, in described normal temperature adsorbent equipment, be filled with dehydrogenation.
2. high-vacuum insulation low-temperature (low temperature) vessel as claimed in claim 1, is characterized in that, described dehydrogenation is silver-colored molecular sieve, and described silver-colored molecular sieve is seated in glass yarn cloth bag.
3. high-vacuum insulation low-temperature (low temperature) vessel as claimed in claim 1, is characterized in that, described normal temperature adsorbent equipment comprises the steel pipe being weldingly fixed on described shell, and described steel pipe upper end welding shrouding seals, and lower end is set with steel wire.
4. high-vacuum insulation low-temperature (low temperature) vessel as claimed in claim 3, is characterized in that, described steel pipe is positioned on the outer peripheral surface of described vacuum layer and is processed with groove, and described steel wire coordinates the fixation with steel wire of described groove in the lower end of described steel pipe by clip.
5. high-vacuum insulation low-temperature (low temperature) vessel as claimed in claim 1, is characterized in that, described inner bag is positioned on the outer wall of described vacuum layer and is also provided with cryogenic absorption device.
6. the high-vacuum insulation low-temperature (low temperature) vessel as described in as arbitrary in claim 1-5, is characterized in that, on described normal temperature adsorbent equipment outer wall, is provided with heating equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763938.XU CN203585801U (en) | 2013-11-27 | 2013-11-27 | High-vacuum heat-insulation low-temperature vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763938.XU CN203585801U (en) | 2013-11-27 | 2013-11-27 | High-vacuum heat-insulation low-temperature vessel |
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| Publication Number | Publication Date |
|---|---|
| CN203585801U true CN203585801U (en) | 2014-05-07 |
Family
ID=50583715
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|---|---|---|---|
| CN201320763938.XU Expired - Fee Related CN203585801U (en) | 2013-11-27 | 2013-11-27 | High-vacuum heat-insulation low-temperature vessel |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405535A (en) * | 2014-09-23 | 2015-03-11 | 三一汽车制造有限公司 | Natural gas control system and vehicle |
| CN109701328A (en) * | 2019-03-04 | 2019-05-03 | 京东方科技集团股份有限公司 | Air filtering system |
-
2013
- 2013-11-27 CN CN201320763938.XU patent/CN203585801U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405535A (en) * | 2014-09-23 | 2015-03-11 | 三一汽车制造有限公司 | Natural gas control system and vehicle |
| CN104405535B (en) * | 2014-09-23 | 2017-11-03 | 三一汽车制造有限公司 | A kind of natural gas control system and vehicle |
| CN109701328A (en) * | 2019-03-04 | 2019-05-03 | 京东方科技集团股份有限公司 | Air filtering system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20211127 |