CN206127034U - Ultrafiltration reverse osmosis water treatment facilities - Google Patents
Ultrafiltration reverse osmosis water treatment facilities Download PDFInfo
- Publication number
- CN206127034U CN206127034U CN201621136369.6U CN201621136369U CN206127034U CN 206127034 U CN206127034 U CN 206127034U CN 201621136369 U CN201621136369 U CN 201621136369U CN 206127034 U CN206127034 U CN 206127034U
- Authority
- CN
- China
- Prior art keywords
- water
- end cap
- reverse osmosis
- rose box
- pipe
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 43
- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 27
- 241000220317 Rosa Species 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 20
- 230000001954 sterilising effect Effects 0.000 claims abstract description 9
- 230000008676 import Effects 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 7
- 239000003651 drinking water Substances 0.000 abstract description 7
- 239000000126 substance Substances 0.000 description 5
- 239000002352 surface water Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- -1 float Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003894 drinking water pollution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- LFLZOWIFJOBEPN-UHFFFAOYSA-N nitrate, nitrate Chemical compound O[N+]([O-])=O.O[N+]([O-])=O LFLZOWIFJOBEPN-UHFFFAOYSA-N 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses an ultrafiltration reverse osmosis water treatment facilities, including former water tank, super filtration membrane rose box, ultraviolet ray sterilization case, RO hyperfilevation rose box and pure water case, former water tank leads to pipe to be connected with high pressure water pump, the outside left side at super filtration membrane rose box is installed to first end cover, the inside left side of super filtration membrane rose box is provided with the coarse filtration net, import KDF crosses the filter bag right side and is provided with the milipore filter and crosses the filter core, the logical pipe of first delivery port of second end cover is connected with the second water inlet on the third end cover of ultraviolet ray sterilization bottom of the case portion, ultraviolet sterilamp is installed all around to ultraviolet ray sterilization case, second delivery port on the fourth end cover leads to pipe and installs the third water inlet of covering at the five terminal on RO hyperfilevation rose box right side to be connected, the inside membrane shell that is provided with of RO hyperfilevation rose box. The utility model discloses economical and practical provides qualified healthy drinking water for the town -dweller -rural -family.
Description
Technical field
This utility model is related to technical field of water treatment equipment, specially a kind of ultra filtering reverse osmosis water treatment facilities.
Background technology
At present, with the industrialized process of China, the problem of environmental pollution is increasingly serious, modern society's water resource
The seriously polluted life that threaten the mankind, the particularly increasingly pollution of water resource, the impact to rural area are the most serious.Substantially
It is standby that the well-digging water intaking of conditional peasant household introduces overhead water storage tower, it is unconditional just in river with directly taken with rubber tube in gully
Diseases caused by retention of fluid is used, and the river and subsoil water in the whole nation more than 90% is contaminated even severe contamination at present, and its pollution is even more to be made us sending out
Refer to, especially subsoil water ferrum, manganese, alkali, chlorine, float, colloid substances, toxic byproduct, pesticide, antibacterial, silt, rust, solid are miscellaneous
Matter contamination hazard, even there is well to have water, also severe overweight, it is impossible to drink, threaten the healthy of the mankind.General small towns does not have
There is the condition using similar city tap-water, small towns population is directly using subsoil water or earth's surface natural stream networks as the next of drinking water
Source, its present situation is, rural households' drinking water pollution, severe overweight；Originally water section is exceeded in town and country, does not reach the Chinese people altogether
And state《Drinking water sanitary standard》, and the present situation of above-mentioned pollution constitutes the great threat to town and country personnel health.Existing city
On face, known water purifier product design construction is relatively simple, there is certain defect, especially to underground in design and manufacture
The filtration of water and surface water and sewage backwash and filtering accuracy and water yield have some limitations, into such product
One technical bottleneck of product, its product are mainly based upon the purification to exceeded well water and surface water water source, reach general drinking water
Purpose and design, it is impossible to solve rural population directly using the water source such as subsoil water or surface water it is purified after better than middle Chinese
People republic is new《Drinking water sanitary standard》, become the purpose of pure water.Such as：Chinese patent literature discloses a kind of " city
Township's hyper-energy purifying heating-body machine " is (ZL200720080620.6) and " Household super-power combined purifier for countryside "（ ZL
200820062692.2）, former is with subsoil water and surface water as water source, using concora crush gac filtration, import KDF
Filtration, ultrafiltration membrance filter, latter are equally with subsoil water and surface water as water source, using the filtration of artificial composite filtering material, ultrafiltration
Membrane filtration is treated as Drinking Water.
Utility model content
The purpose of this utility model is to provide a kind of ultra filtering reverse osmosis water treatment facilities, to solve in above-mentioned background technology
The problem of proposition, is had an advantageous effect in that:This utility model is economical and practical, provides the drink of qualified health for town-dweller-rural-family
Use water.
For achieving the above object, this utility model provides following technical scheme：A kind of ultra filtering reverse osmosis water treatment facilities, bag
Raw water box, ultrafiltration membrane Rose Box, ultraviolet disinfection case, RO reverse osmosis Rose Box and pure water tank are included, the raw water box passes through water
Pipe is connected with high-pressure hydraulic pump, and is connected with the first water inlet on first end lid by water pipe on the right side of high-pressure hydraulic pump, described first
End cap is arranged on the outer left side of ultrafiltration membrane Rose Box, and the second end cap is arranged on the outside right side of ultrafiltration membrane Rose Box,
The ultrafiltration membrane Rose Box inside left is provided with coarse filtration net, and coarse filtration net is connected with import KDF filter bags, it is described enter
It is provided with the right side of ultrafiltration membrance filter core, and ultrafiltration membrance filter core on the right side of mouth KDF filter bags and absorbent charcoal adsorber is installed, it is described
First outlet of the second end cap is connected with the second water inlet on the 3rd end cap in ultraviolet disinfection bottom portion by water pipe, and
Ultraviolet disinfection bottom portion is provided with the 4th end cap, and the ultraviolet disinfection case surrounding is provided with ultraviolet sterilizing lamp, and ultraviolet
Line sterilization tank is provided centrally with glass water pipe, and the second outlet on the 4th end cap is by water pipe and is arranged on RO reverse osmosis
The 3rd water inlet connection on the 5th end cap on the right side of Rose Box, and the 6th end cap, institute are installed on the left of RO reverse osmosis Rose Boxes
State RO reverse osmosis Rose Boxes and be internally provided with putamina, and putamina is internally provided with RO films, the putamina center is provided with water producing pipe,
And water producing pipe is connected with the 3rd outlet on the 6th end cap, the 3rd outlet is connected with pure water tank by water pipe.
Preferably, water intaking valve is installed on the right side of the high-pressure hydraulic pump.
Preferably, the side of the ultrafiltration membrane Rose Box and RO reverse osmosis Rose Boxes is provided with blowoff valve.
Preferably, first end cap, the second end cap, the 3rd end cap, the 4th end cap, the 5th end cap and the 6th end cap
Dismounting.
Preferably, multiple inlet openings are provided with the water producing pipe.
Compared with prior art, the beneficial effects of the utility model are：Silt that the equipment effectively can be gone in eliminating water, ferrum
The harmful substances such as rust, float, colloid, antibacterial, virus, larger molecular organicses, the chlorine residue that effectively can be gone in eliminating water, solubility weight
Metal, controls growth of microorganism, prevents the accumulation of hard scale, except ferrum, reduces fluoride, nitrate, nitrate and sulfate etc., goes
Antibacterial and algae in eliminating water, the filter membrane and reverse osmosis (RO) film of energy effective protection ultrafiltration, that what is effectively can gone in eliminating water is viral, thin
Bacterium, toxin, heavy metal, harmful substance, the dissolved salts gone in eliminating water, colloid, Organic substance etc., the desalination of bitter go eliminating water
In all impurity, thermal source, carcinogen, microorganism etc., whether turbidity, colourity, PH values, coliform, chloride, cyanogen
The harmful substances such as compound, arsenic, hydrargyrum, lead, improve water quality, so that water quality more glycol is sweet, after filtration, water quality reaches middle Chinese
People republic《Drinking Water primary standard》.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1- raw water boxs；2- high-pressure hydraulic pumps；3- water intaking valves；4- water pipes；The first water inlets of 5-；The first end caps of 6-；7- is thick
Drainage screen；8- import KDF filter bags；9- ultrafiltration membrane Rose Boxes；10- ultrafiltration membrance filter cores；11- absorbent charcoal adsorbers；12-
Second end cap；The first outlets of 13-；The second water inlets of 14-；The 3rd end caps of 15-；16- glass water pipes；17- ultraviolet sterilizing lamps；
18- ultraviolet disinfection casees；The 4th end caps of 19-；The second outlets of 20-；The 3rd water inlets of 21-；The 5th end caps of 22-；23-RO is inverse to be oozed
Through filter box；24- putaminas；25-RO films；26- water producing pipes；The 6th end caps of 27-；The 3rd outlets of 28-；29- pure water tanks；30- is arranged
Dirty valve.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
Refer to Fig. 1, a kind of ultra filtering reverse osmosis water treatment facilities of a kind of embodiment that this utility model is provided, including raw water
Case 1, ultrafiltration membrane Rose Box 9, ultraviolet disinfection case 18, RO reverse osmosis Rose Box 23 and pure water tank 29, raw water box 1 pass through water pipe
4 are connected with high-pressure hydraulic pump 2, and are connected with the first water inlet 5 on the first end cap 6 by water pipe 4 on the right side of high-pressure hydraulic pump 2, first
End cap 6 is arranged on the outer left side of ultrafiltration membrane Rose Box 9, and the second end cap 12 is arranged on the outside of ultrafiltration membrane Rose Box 9
Right side, 9 inside left of ultrafiltration membrane Rose Box are provided with coarse filtration net 7, and coarse filtration net 7 is connected with import KDF filter bags 8,
It is provided with the right side of import KDF filter bags 8 on the right side of ultrafiltration membrance filter core 10, and ultrafiltration membrance filter core 10 and activated carbon adsorption dress is installed
Put 11, the on the 3rd end cap 15 of the first outlet 13 of the second end cap 12 by water pipe 4 with 18 bottom of ultraviolet disinfection case
Two water inlets 14 connect, and 18 bottom of ultraviolet disinfection case is provided with the 4th end cap 19, and 18 surrounding of ultraviolet disinfection case is provided with
Ultraviolet sterilizing lamp 17, and ultraviolet disinfection case 18 is provided centrally with glass water pipe 16, the second outlet on the 4th end cap 19
20 are connected with the 3rd water inlet 21 on the 5th end cap 22 on the right side of RO reverse osmosis Rose Box 23 by water pipe 4, and RO
6th end cap 27 is installed on the left of reverse osmosis Rose Box 23, RO reverse osmosis Rose Box 23 is internally provided with putamina 24, and putamina 24
RO films 25 are internally provided with, 24 center of putamina is provided with the 3rd water outlet on water producing pipe 26, and water producing pipe 26 and the 6th end cap 27
Mouth 28 connects, and the 3rd outlet 28 is connected with pure water tank 29 by water pipe 4, is provided with water intaking valve 3, exceedes on the right side of high-pressure hydraulic pump 2
The side of membrane filtration case 9 and RO reverse osmosis Rose Box 23 is provided with blowoff valve 30, the first end cap 6, the second end cap the 12, the 3rd
End cap 15, the 4th end cap 19, the 5th end cap 22 and the 6th end cap 27 are detachable, and multiple inlet openings are provided with water producing pipe 26.
Operation principle：During use, switch on power, open 3 high-pressure hydraulic pump 3 of water intaking valve and extract the water in raw water box 1 out injection
First step filtration is carried out in ultrafiltration membrane Rose Box 9, the water after then filtering is sterilized in flowing into ultraviolet disinfection case 18, it
Water is filtered in RO reverse osmosis Rose Box 23 is flowed into afterwards, and prevents pus reverse osmosiss, and after being disposed, water flows into pure water
In case 29.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type is by claims rather than described above is limited, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in this utility model.Any reference in claim should not be considered as restriction
Involved claim.
Claims (5)
1. a kind of ultra filtering reverse osmosis water treatment facilities, including raw water box（1）, ultrafiltration membrane Rose Box（9）, ultraviolet disinfection case
（18）, RO reverse osmosis Rose Boxes（23）And pure water tank（29）, it is characterised in that：The raw water box（1）By water pipe（4）With high pressure
Water pump（2）Connection, and high-pressure hydraulic pump（2）Right side passes through water pipe（4）With the first end cap（6）On the first water inlet（5）Connection, institute
State the first end cap（6）Installed in ultrafiltration membrane Rose Box（9）Outer left side, and the second end cap（12）Installed in ultrafiltration membrane mistake
Filter box（9）Outside right side, the ultrafiltration membrane Rose Box（9）Inside left is provided with coarse filtration net（7）, and coarse filtration net
（7）With import KDF filter bags（8）Connection, the import KDF filter bags（8）Right side is provided with ultrafiltration membrance filter core（10）, and it is super
Membrane filtration core（10）Right side is provided with absorbent charcoal adsorber（11）, second end cap（12）The first outlet（13）It is logical
Cross water pipe（4）With ultraviolet disinfection case（18）3rd end cap of bottom（15）On the second water inlet（14）Connection, and ultraviolet
Sterilization tank（18）Bottom is provided with the 4th end cap（19）, the ultraviolet disinfection case（18）Surrounding is provided with ultraviolet sterilizing lamp
（17）, and ultraviolet disinfection case（18）It is provided centrally with glass water pipe（16）, the 4th end cap（19）On the second outlet
（20）By water pipe（4）With installed in RO reverse osmosis Rose Boxes（23）5th end cap on right side（22）On the 3rd water inlet（21）
Connection, and RO reverse osmosis Rose Boxes（23）Left side is provided with the 6th end cap（27）, the RO reverse osmosis Rose Box（23）Inside sets
It is equipped with putamina（24）, and putamina（24）It is internally provided with RO films（25）, the putamina（24）Center is provided with water producing pipe（26）, and
Water producing pipe（26）With the 6th end cap（27）On the 3rd outlet（28）Connection, the 3rd outlet（28）By water pipe（4）
With pure water tank（29）Connection.
2. a kind of ultra filtering reverse osmosis water treatment facilities according to claim 1, it is characterised in that：The high-pressure hydraulic pump（2）
Right side is provided with water intaking valve（3）.
3. a kind of ultra filtering reverse osmosis water treatment facilities according to claim 1, it is characterised in that：The ultrafiltration membrane is filtered
Case（9）With RO reverse osmosis Rose Boxes（23）Side be provided with blowoff valve（30）.
4. a kind of ultra filtering reverse osmosis water treatment facilities according to claim 1, it is characterised in that：First end cap（6）、
Second end cap（12）, the 3rd end cap（15）, the 4th end cap（19）, the 5th end cap（22）With the 6th end cap（27）It is detachable.
5. a kind of ultra filtering reverse osmosis water treatment facilities according to claim 1, it is characterised in that：The water producing pipe（26）On
It is provided with multiple inlet openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136369.6U CN206127034U (en) | 2016-10-19 | 2016-10-19 | Ultrafiltration reverse osmosis water treatment facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136369.6U CN206127034U (en) | 2016-10-19 | 2016-10-19 | Ultrafiltration reverse osmosis water treatment facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206127034U true CN206127034U (en) | 2017-04-26 |
Family
ID=58574500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621136369.6U Expired - Fee Related CN206127034U (en) | 2016-10-19 | 2016-10-19 | Ultrafiltration reverse osmosis water treatment facilities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206127034U (en) |
-
2016
- 2016-10-19 CN CN201621136369.6U patent/CN206127034U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 |