CN212367555U - Heating tube - Google Patents
Heating tube Download PDFInfo
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- CN212367555U CN212367555U CN201922389644.5U CN201922389644U CN212367555U CN 212367555 U CN212367555 U CN 212367555U CN 201922389644 U CN201922389644 U CN 201922389644U CN 212367555 U CN212367555 U CN 212367555U
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- Prior art keywords
- heating
- graphene
- core
- tube
- heating core
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 106
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000010453 quartz Substances 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 51
- 229910021389 graphene Inorganic materials 0.000 claims description 47
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000002775 capsule Substances 0.000 abstract description 11
- 230000004060 metabolic process Effects 0.000 abstract description 3
- 210000000987 immune system Anatomy 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 30
- 239000000203 mixture Substances 0.000 description 16
- 229910002804 graphite Inorganic materials 0.000 description 13
- 239000010439 graphite Substances 0.000 description 13
- 239000011324 bead Substances 0.000 description 8
- -1 graphite alkene Chemical class 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical group [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- SPAGIJMPHSUYSE-UHFFFAOYSA-N Magnesium peroxide Chemical compound [Mg+2].[O-][O-] SPAGIJMPHSUYSE-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 206010047141 Vasodilatation Diseases 0.000 description 1
- LUTSRLYCMSCGCS-BWOMAWGNSA-N [(3s,8r,9s,10r,13s)-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,16-decahydrocyclopenta[a]phenanthren-3-yl] acetate Chemical compound C([C@@H]12)C[C@]3(C)C(=O)CC=C3[C@@H]1CC=C1[C@]2(C)CC[C@H](OC(=O)C)C1 LUTSRLYCMSCGCS-BWOMAWGNSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000024883 vasodilation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Abstract
The utility model discloses a heating tube, including heating core, wire and quartz capsule, wherein the both ends of heating core are connected with the wire respectively and arrange the quartz capsule in, the one end and the heating core of wire are connected, and the other end is drawn forth from the tip of quartz capsule, just the both ends of quartz capsule are sealed. The utility model discloses a heating tube has good heating performance, heat time is short, long service life, has ultralow consumption and can reach the ultra-high temperature more than 400 ℃, can spread out far infrared light when heating tube generates heat moreover, can promote metabolism, promote human immune system, can be applied to fields such as family's heating, medical equipment, industrial heating, creates green harmless environment.
Description
Technical Field
The utility model belongs to the technical field of heating element, in particular to heating tube, especially a filled graphite alkene heating core's heating tube.
Background
The resistance heating unit is commonly used in an electric heating system, and generally adopts materials such as metal foil, thin film coating, nickel wire, metal mesh and the like. The most used heating element is nichrome. However, for nichrome alloys, the following still appear to be insufficient at present: the density of the nickel-chromium alloy is large, and the thickness is several millimeters when the nickel-chromium alloy is used; low resistivity (about 10)-6Omega m), the defects of low electrothermal conversion efficiency, low heating rate, no automatic constant temperature and power compensation function of a heating element, complex structure of an electrothermal system, large thermal inertia and the like still exist; the iron-chromium-aluminum is ferrite alloy, has normal temperature brittleness, 475 ℃ brittleness and high temperature brittleness above 1000 ℃, and finally causes short service life of the electric heating element due to low high temperature strength caused by the high temperature brittleness; the weldability of the alloy is poor and it is difficult to repair.
Graphene (Graphene) is a two-dimensional crystalline material composed of a layer of single carbon atoms, known as a miraculous material, and is the thinnest of known materials. Andre geom and Konstantin Novoselov gained the physical prize of nobel 2010 due to their contributions to graphene research and raised the hot tide of the golden world. The excellent electric conduction and heat conduction performance of the graphene completely exceeds that of metal, and the graphene has the advantages of good mechanical performance, lower density, high temperature resistance and corrosion resistance, so that the graphene has the potential of replacing the field of the existing electric heating materials.
However, most of the existing graphene is used for heat dissipation, and only a few graphene is used for heating. Moreover, the material used for the existing graphene heating is comprehensively resistant to temperature and cannot replace a high-temperature heating element with the temperature of more than 300 ℃, so that the current heating requirement is met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the above-mentioned problem that exists among the prior art, provide and filled the heating tube that graphite alkene generates heat the core. The utility model discloses can improve thermal conversion efficiency by a wide margin, have advantages such as super low-power consumption, ultra-temperature.
In order to achieve the above object, the utility model adopts the following technical scheme:
a heating tube is characterized by comprising a heating core, a metal wire and a quartz tube, wherein two ends of the heating core are respectively connected with the metal wire and are arranged in the quartz tube, one end of the metal wire is connected with the heating core, the other end of the metal wire is led out from the end part of the quartz tube, and two ends of the quartz tube are sealed.
Preferably, the heating device further comprises a support ring, wherein the support ring is located between the metal wire and the heating core and used for connecting the metal wire and the heating core.
Preferably, the quartz heating tube further comprises quartz glass beads, wherein the quartz glass beads are positioned on the metal wires at the two ends of the heating core and used for sealing the two ends of the quartz tube.
Preferably, the metal wire is a molybdenum wire with a diameter of 3-10 mm.
Preferably, the heating core is a graphene heating core.
Preferably, the heating tube is in the shape of a long tube or other shapes.
Compared with the prior art, the utility model discloses beneficial effect does:
1. the utility model discloses a graphite alkene core that generates heat that adopts has low cost, plasticity and prepares simply, makes heating element or generates heat behind the core, and is of high quality, the homogeneity that generates heat good.
2. The utility model discloses a core that generates heat has advantages such as thermal conversion efficiency height, heat time is short, ultra-temperature generate heat temperature, long service life, can also control heating element impedance value and arrange DC or alternating voltage.
3. The utility model discloses a heating tube has ultralow power consumption, ultra-temperature, energy-conserving characteristics, only needs traditional heating pipe 20% power consumptive power, can reach ultra-temperature more than 400 ℃ in 10 watts to 350 watts, can replace all high power consumption's heating household electrical appliances almost.
4. The utility model discloses a still can the spread out far infrared light when heating tube generates heat, and far infrared produces resonance with human molecule, can promote the little vasodilatation, make blood circulation smooth and easy, promotes metabolism, promotes human immune system, but wide application in fields such as family's heating, medical equipment, industrial heating makes green harmless environment.
Drawings
Fig. 1 is a schematic structural view of the middle heating tube of the present invention.
Fig. 2 is a schematic view of the structure of the middle heating tube of the present invention.
Reference is made to the accompanying drawings in which: 1 is a heating core, 2 is a support ring, 3 is a metal wire, 4 is a quartz tube, and 5 is a quartz glass bead.
Detailed Description
In order to make the technical process and innovative features of the present invention easier to understand, the following detailed description of the embodiments of the present invention is given as an example of the specific embodiments of the present invention, and the embodiments described below are not intended to cover the entire model.
The utility model discloses a heating tube includes heating core 1, wire 3, quartz capsule 4, wherein heating core 1's both ends are connected with wire 3 respectively and arrange quartz capsule 4 in, and wire 3's one end is connected with heating core 1, and the other end is drawn forth from quartz capsule 4 tip, and quartz capsule 4's both ends are sealed.
The quartz tube can resist the high temperature of 1200 ℃, is non-conductive and has the light transmission characteristic, can meet the requirements of the heating tube of the application, is preferable, and can also be a glass tube, an alumina tube, a ceramic tube or the like besides the quartz tube.
The metal wire is preferably a molybdenum wire which can resist the high temperature of the oxyhydrogen flame of 2500 ℃ and has the diameter of 3-10 mm.
Preferably, the heat generating tube further comprises a support ring 2 located between the wire 3 and the heat generating core 1 for connecting the wire 3 and the heat generating core 1.
Preferably, the heating tube further comprises quartz beads 5 positioned on the metal wires 3 at both ends of the heating core 1, and the quartz beads 5 are placed at both ends of the quartz tube 4 and then burned to a molten state by oxyhydrogen flame for sealing.
The utility model discloses a heating tube can be rectangular tubular shape or other shapes, and specific shape can be selected according to the practical application scene.
As shown in fig. 1-2, the structure diagram and the structural decomposition diagram of the heating tube of the present invention are shown respectively, the heating tube includes a heating core 1, a support ring 2, a metal wire 3, a quartz tube 4, and a quartz glass bead 5, wherein both ends of the heating core 1 are connected with the metal wire 3 respectively, the support ring 2 is located between the metal wire 3 and the heating core 1, and the quartz glass bead 5 is located on the metal wire 3 at both ends. Place the heater that above-mentioned heating core 1, support ring 2, wire 3, quartz glass pearl 5 constitute in quartz capsule 4, leave certain length's wire 3 outside quartz capsule 4, burn glass bead 5 to the both ends involution of melting and quartz capsule 4 with oxyhydrogen flame and obtain the utility model discloses an ultra-high temperature heating tube of ultra-low power consumption graphite alkene.
The utility model discloses a heating tube has ultralow power consumption, ultra-high temperature's characteristics, only needs traditional heating pipe 20% power consumptive power, can reach ultra-temperature more than 400 ℃ 10 watts to 350 watts hour, can replace all high power consumption's heating household electrical appliances almost. And the characteristics of low energy consumption and electricity saving can ensure that people can use the heating household appliance in cold winter, and the heating household appliance can not be used because of saving the electricity cost.
Preferably, the utility model discloses a core that generates heat is graphite alkene core that generates heat.
The graphene heating core is prepared from a graphene heating mixture, has plasticity, and can be prepared into heating elements of various types or shapes. The impedance value of the heating element can be controlled by adjusting the proportion of the graphene heating mixture to match with direct current or alternating current voltage. Especially, the domestic direct current 36V heating element which can directly accord with safety regulations is manufactured, and the electron mobility of each material in the heating mixture can be prepared to match with the electric insulation, so that the impedance meeting the requirements is obtained.
Graphene heating mixture
The utility model provides a graphite alkene mixture that generates heat, composition ratio with the mass fraction component: 1-5 parts of graphene, 5-20 parts of insulating particles, 3-30 parts of solvent and 1-13 parts of cross-linking agent.
The material used in the graphene heating mix of the present invention will be described in detail.
The graphene has the heat conduction performance of 5000W/m.K, the Young modulus of 1100GPa, the fracture strength of 125GPa, excellent electrical properties and the electron mobility of 2 multiplied by 105cm at room temperature2And V.s, the graphene is taken as the conductive component in the heating mixture of the utility model, and the heating mixture has the advantages of rapid temperature rise, energy conservation, emission of far infrared rays and the like. The far infrared ray, also called "light of life", produces resonance with the molecules of the human body, and can promote the expansion of the blood capillary, smooth the blood circulation, promote the metabolism, and further increase the immunity of the body.
The insulating fine particles are preferably one or a combination of several of kaolin, mica powder, quartz powder, silicon dioxide, white carbon black, magnesium oxide and titanium dioxide. The electron mobility of the graphene can reach 2 multiplied by 105cm2and/V.s, therefore, the impedance is adjusted by selecting insulating particles with the characteristics of 1200 ℃ high temperature resistance and 200kv/mm electrical insulation to match the density, so that the impedance value is controllable by selecting and mixing insulating particles satisfying the above conditions such as kaolin, mica powder, silicon dioxide, white carbon black, magnesium dioxide, titanium dioxide and the like.
The solvent, which serves to disperse and dissolve the mixture, may be selected from organic solvents commonly used in the art, such as ethanol.
The cross-linking agent is silicate, specifically refers to a compound composed of silicon and oxygen, and sometimes also includes one or more metals or hydrogen elements. Conceptually, silicate is a generic term for compounds composed of silicon, oxygen and metal, and it is also used to refer to salts derived from silicon dioxide or silicic acid. The most stable silicates are compounds composed of silica and other substances.
Because graphene is neither hydrophilic nor oleophilic, and can hardly be compatible with other media or polymers, and is not easy to be connected with other substances, if a simple physical bonding method is adopted, trace physical pressure exists under a high-pressure mode, so that the characteristics of graphene slowly disappear after the graphene is heated to high temperature, the graphene is converted into pure graphite characteristics, when the characteristics of graphene are converted into the graphite characteristics, the impedance converted into the graphite characteristics is improved, and the conversion speed is different, so that the local impedance is not uniform, and the service life of an element in a high-temperature environment is influenced. In order to overcome shortcoming on the graphite alkene innate, solve and not produce physical force under high temperature environment, the utility model discloses a chemical mode, be different from the physical mode and connect, the utility model discloses an introduce functional group, improve the interface cohesion of graphite alkene with medium and polymer. The silicate contains a large amount of active oxygen-containing functional groups and can be used as a binding agent for graphene and all substances, so that a connectable connecting chain is generated on the surface of the graphene, the graphene is easy to be jointed with other substances, the problem that the graphene is not reduced into graphite in a high-temperature environment of 900 ℃ can be solved, and the original characteristics of the graphene are kept.
Example 1:
the preparation method of the heating mixture for preparing the graphene heating core comprises the following steps:
(1) baking the graphene and the insulating particles;
(2) putting 1 part of the graphene processed in the step (1) and 19 parts of insulating particles into a stirrer according to a ratio, and uniformly mixing to obtain a mixture;
(3) sieving the mixture prepared in the step (2), adding 27 parts of solvent, and sealing and stirring to prepare mixed slurry;
(4) and uniformly mixing the mixed slurry with 11 parts of a cross-linking agent to prepare the graphene heating mixture.
The process for preparing the heat-generating tube from the graphene heating mixture comprises the following steps:
(1) enabling the graphene heating mixture to pass through a 3mm flower squeezing nozzle to form a graphene heating core semi-finished product;
(2) baking and annealing the semi-finished product of the graphene heating core to obtain the graphene heating core;
(3) taking two metal wires, placing the two metal wires on two sides of the graphene heating core, pressing the metal wires and the graphene heating core into a whole in a hot press forming mode, and winding a plurality of support rings on the graphene heating core to obtain the graphene heating core;
(4) and placing the graphene heating wire into a quartz tube, vacuumizing the quartz tube, filling inert gas into the quartz tube, sealing two ends of the quartz tube by oxyhydrogen flame, and only leaving about 1cm of metal wire outside the quartz tube to obtain the ultra-high temperature graphene heating tube with ultra-low power consumption.
To the utility model discloses the heating element of the graphite alkene of preparation in embodiment 1 carries out long-time circular telegram test, and the efficiency of generating heat is stable, and low consumption power can reach the ultra-temperature more than 400 ℃ in 10 watts to 350 watts.
The utility model discloses can select the material and use different ratios according to the market demand, the product that accords with the performance is made to the adjustment impedance value.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A heating tube is characterized by comprising a heating core, a metal wire and a quartz tube, wherein two ends of the heating core are respectively connected with the metal wire and are arranged in the quartz tube; the heating core is a graphene heating core; pressing and connecting the metal wire and the graphene heating core into a whole in a hot-press forming mode, and winding a plurality of support rings on the graphene heating core; the heating core is arranged on the heating core, and the heating core is arranged on the heating core and is used for heating the two ends of the heating core.
2. A heat generating tube according to claim 1, wherein the metal wire is a molybdenum wire having a diameter of 3-10 mm.
3. A heat generating tube according to claim 1 or 2, wherein the heat generating tube is in the shape of an elongated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922389644.5U CN212367555U (en) | 2019-12-27 | 2019-12-27 | Heating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922389644.5U CN212367555U (en) | 2019-12-27 | 2019-12-27 | Heating tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212367555U true CN212367555U (en) | 2021-01-15 |
Family
ID=74137844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922389644.5U Expired - Fee Related CN212367555U (en) | 2019-12-27 | 2019-12-27 | Heating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212367555U (en) |
-
2019
- 2019-12-27 CN CN201922389644.5U patent/CN212367555U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20210115 |