CN203737108U - Quickly washed type RO (reverse osmosis) membrane filtering element structure - Google Patents
Quickly washed type RO (reverse osmosis) membrane filtering element structure Download PDFInfo
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- CN203737108U CN203737108U CN201420001300.7U CN201420001300U CN203737108U CN 203737108 U CN203737108 U CN 203737108U CN 201420001300 U CN201420001300 U CN 201420001300U CN 203737108 U CN203737108 U CN 203737108U
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- water
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- membrane component
- annular protrusion
- pure water
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- 239000012528 membrane Substances 0.000 title claims abstract description 90
- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 238000001223 reverse osmosis Methods 0.000 title abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 183
- 239000002351 wastewater Substances 0.000 claims abstract description 84
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
- 102000010637 Aquaporins Human genes 0.000 claims description 7
- 108010063290 Aquaporins Proteins 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000010287 polarization Effects 0.000 abstract description 4
- 238000011033 desalting Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 108091006146 Channels Proteins 0.000 description 8
- 238000001764 infiltration Methods 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 210000002435 tendon Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a quickly washed type RO (reverse osmosis) membrane filtering element structure which comprises a filtering drum, an RO membrane element and a filtering drum cover arranged at one end of the filtering drum, wherein the RO membrane element is arranged in the filtering drum and the filtering drum cover; the quickly washed type RO membrane filtering element structure further comprises a water path sealing piece; and the water path sealing piece is arranged at the water outlet end of the RO membrane element. By the adoption of the water path sealing piece, the quickly washed type RO membrane filtering element structure is high in sealing property; raw water and wastewater cannot be mixed; the desalting rate of the RO membrane element is increased; furthermore, the water path sealing piece is arranged on the side wall of the water outlet end of the RO membrane element, so that the wastewater can be greatly stored in the filtering drum, and quick drainage of the wastewater is realized, so that the phenomenon of concentration polarization is reduced to the maximum extent, the service life of the RO membrane element is prolonged, the water energy consumption is reduced, and the water utilization rate is improved; and the quickly washed type RO membrane filtering element structure has the advantages of high filtering efficiency, simple structure, convenience in use and the like.
Description
Technical field
The utility model relates to art of filters, relates in particular to a kind of type RO membrane cartridge structure of getting express developed.
Background technology
Growth along with industrial expansion and population, people's living environment has been subject to very large pollution, especially the pollution of the sewage discharge of industry to drinking water, in order to make people drink the water of safe and sanitary, is used water-purifying filter that drinking water is processed and is very important.Water-purifying filter can be by the former water access such as municipal tap water, well water, and user can directly drink the water flowing out from water-purifying filter.Because the filter core of water-purifying filter inside can carry out filtration, purification processing to water, make after treatment water out can meet national water hygiene health standards.
The filter of existing conventional domestic coiled reverse osmosis membrane structure fills a flexible glue water shutoff circle on RO membrane component, realizes the isolation of former water and waste water, thereby realizes osmosis filtration.The problems such as but the former water of this filter and waste water isolating construction exist easily string water, and sealing is poor, decline the salt rejection rate of coiled reverse osmosis membrane structure.And because the filter of conventional domestic coiled reverse osmosis membrane structure is positioned over flexible glue water shutoff circle the water inlet end of coiled reverse osmosis membrane structure, cause coiled reverse osmosis membrane structure that the waste water of generation is lodged in filter cylinder in a large number, make the diaphragm long period of soaking of coiled reverse osmosis membrane structure in the waste water of high concentration, thereby cause coiled reverse osmosis membrane structure easily to pile up dirt, cause diaphragm to be prone to dirty stifled, shorten the service life of coiled reverse osmosis membrane structure.
Utility model content
The purpose of this utility model is for the problems referred to above, to society, provides a kind of former water and waste water non-series-water, good airproof performance, the type of getting express developed the RO membrane cartridge structure that salt rejection rate is high.
The technical solution of the utility model is: design a kind of type RO membrane cartridge structure of getting express developed, comprise filter cylinder, RO membrane component and be arranged on the filtering cartridge lid of described filter cylinder one end, described RO membrane component is arranged in described filter cylinder and described filtering cartridge lid, also comprise water route seal, described water route seal is arranged on the water side of described RO membrane component.
As to improvement of the present utility model, described water route seal comprises annulus, circular connector and lower annulus, the lower end of described upper annulus is connected with the upper end of described lower annulus by described circular connector, and described lower annulus is set on the sidewall of water side of described RO membrane component.
As to improvement of the present utility model, the other end of described filter cylinder is provided with pure water apopore and wastewater effluent hole, and be provided with pure water annular protrusion at the inner surface of the other end of described filter cylinder, described pure water annular protrusion is connected with the center water producing pipe of described RO membrane component, and described center water producing pipe is communicated with described pure water apopore by described pure water annular protrusion; Described upper annulus is connected with the inwall of described filter cylinder, is provided with waste water tunnel on described between annulus and described pure water annular protrusion, and the wastewater effluent end of described RO membrane component communicates with described wastewater effluent hole by described waste water tunnel.
As to improvement of the present utility model, Yuan Shui inlet opening is arranged on described filtering cartridge lid, and described Yuan Shui inlet opening communicates with the former water water inlet end of described RO membrane component.
As to improvement of the present utility model, on described filtering cartridge lid, be provided with pure water apopore, He Yuanshui inlet opening, wastewater effluent hole, inner surface at described filtering cartridge lid is provided with pure water annular protrusion and waste water annular protrusion, described pure water annular protrusion is connected with the center water producing pipe of described RO membrane component, and described center water producing pipe is communicated with described pure water apopore by described pure water annular protrusion; Described waste water annular protrusion is connected with described upper annulus, is provided with waste water tunnel on described between annulus and described pure water annular protrusion, and the wastewater effluent end of described RO membrane component communicates with described wastewater effluent hole by described waste water tunnel.
As to improvement of the present utility model, between described waste water annular protrusion, described water route seal, described RO membrane component and the inwall of described filter cylinder, be provided with former aquaporin, described Yuan Shui inlet opening communicates with the former water water inlet end of described RO membrane component by described former aquaporin.
The utility model is owing to having adopted water route seal, make to get express developed the good airproof performance of type RO membrane cartridge structure, former water and waste water non-series-water, improved the salt rejection rate of RO membrane component, and water route seal is arranged on the sidewall of water side of RO membrane component, thereby avoided waste water retaining in a large number in filter cylinder, realize waste water quick drain, maximized reduction concentration polarization phenomenon, in the service life of prolongation RO membrane component, has reduced water consumption, improved the utilization rate of water, have to filter and imitate the advantages such as high, simple in structure, easy to use.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of a kind of embodiment of the present utility model.
Fig. 2 be Fig. 1 A-A to cross-sectional view.
Fig. 3 is the stereo decomposing structural representation of Fig. 1.
Fig. 4 is the planar structure schematic diagram of another kind of embodiment of the present utility model.
Fig. 5 be Fig. 4 A-A to cross-sectional view.
Fig. 6 is the stereo decomposing structural representation of Fig. 4.
Wherein: 1. filter cylinder; 11. pure water annular protrusions; 12. waste water annular protrusions; 2. filtering cartridge lid; 3.RO membrane component; 31. counter-infiltration diaphragms; 32. center water producing pipes; 4. water route seal; Annulus on 41.; 42. circular connectors; 43. times annulus; 100. Yuan Shui inlet openings; 200. pure water apopores; 300. wastewater effluent holes; 400. sealing ring.
The specific embodiment
In description of the present utility model, it will be appreciated that, in term, orientation or the position relationship of the indication such as " " center ", " on ", D score, 'fornt', 'back', " left side ", " right side " be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, so can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection ", " being connected " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also that dismounting connects, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, can be to be also indirectly connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term at concrete meaning of the present utility model.In addition,, in description of the present utility model, except as otherwise noted, " a plurality of ", " somes' " implication is two or more.
Refer to Fig. 1 to Fig. 3, that Fig. 1 to Fig. 3 discloses is a kind of a kind of embodiment that gets type RO membrane cartridge structure express developed, comprise filter cylinder 1, RO membrane component 3 and filtering cartridge lid 2, described filtering cartridge lid 2 is arranged on one end of described filter cylinder 1, be that described filtering cartridge lid 2 links together with one end of described filter cylinder 1, can or be threaded togather by clamping.Described RO membrane component 3 is arranged in described filter cylinder 1 and described filtering cartridge lid 2, also comprises water route seal 4, and described water route seal 4 is arranged on the water side of described RO membrane component 3.
In the present embodiment, described water route seal 4 comprises annulus 41, circular connector 42 and lower annulus 43, the lower end of described upper annulus 41 is connected with the upper end of described lower annulus 43 by described circular connector 42, and described lower annulus 43 is set on the sidewall of water side of described RO membrane component 3.The diameter of described upper annulus 41 is less than the diameter of described lower annulus 43, on the inwall of annulus 41 and described circular connector 42, be also provided with convex tendon on described, the plane at described convex tendon place is vertical with the cross section of described upper annulus 41, and the benefit of design is to be convenient to waste water get rid of fast like this.
In the present embodiment, the other end of described filter cylinder 1 is provided with pure water apopore 200 and wastewater effluent hole 300, and be provided with pure water annular protrusion 11 at the inner surface of the other end of described filter cylinder 1, described pure water annular protrusion 11 is connected with the center water producing pipe 32 of described RO membrane component 3, be that described center water producing pipe 32 is arranged in described pure water annular protrusion 11, on described center water producing pipe 32, be provided with groove, in described groove, be provided with sealing ring 400, described center water producing pipe 32 is communicated with described pure water apopore 200 by described pure water annular protrusion 11.The effect of described sealing ring 400 is the pure water generation side leakages that prevent in center water producing pipe 32.
In the present embodiment, described upper annulus 41 is connected with the inwall of described filter cylinder 1, between annulus 41 and described pure water annular protrusion 11, be provided with waste water tunnel on described, be to form waste water tunnel between the inwall of described upper annulus 41 and the outer wall of described pure water annular protrusion 11, the wastewater effluent end of described RO membrane component 3 communicates with described wastewater effluent hole 300 by described waste water tunnel, on annulus 41, be provided with sealing ring 400 on described, prevent the waste water generation side leakage in described waste water tunnel.
In the present embodiment, Yuan Shui inlet opening 100 is arranged on described filtering cartridge lid 2, and described Yuan Shui inlet opening 100 communicates with the former water water inlet end of described RO membrane component 3.
In the present embodiment, counter-infiltration diaphragm 31 in described RO membrane component 3 is wrapped on described center water producing pipe 32, and described counter-infiltration diaphragm 31 is through being folded to form water inlet flow channel and producing water flow passage, the adjacent dual-side of described water inlet flow channel and flanging is away from the part section closing seam of described center water producing pipe 32, make this dual-side approach water producing pipe 32 places, described center and form respectively segment raw water inlet, and make the side relative with flanging of water inlet flow channel form wastewater effluent mouth, in described raw water inlet, be provided with water inlet pipe, on described water inlet pipe, there are a plurality of apertures towards wastewater effluent mouth.Like this design benefit be, in raw water inlet, be provided with water inlet pipe, water inlet first flow to water inlet pipe, then from the aperture of water inlet pipe, to wastewater effluent mouth direction, spray into water inlet flow channel, make into water even, can not exist water inlet dead angle, thereby avoided fouling.
Operation principle is, former water flows to the former water water inlet end of described RO membrane component 3 from described Yuan Shui inlet opening 100, enter into the inside of described RO membrane component 3, after processing, the described counter-infiltration diaphragm 31 of described RO membrane component 3 produces pure water and waste water, pure water enters into described center water producing pipe 32, through described pure water annular protrusion 11, from described pure water apopore 200, flows out.Waste water flows out from the wastewater effluent end of described RO membrane component 3, enters into described waste water tunnel, finally 300 outflows from described wastewater effluent hole.Described water route seal 4 can be separated with waste water by former water well, effectively solved the string water problems of former water and waste water, improved the salt rejection rate of described RO membrane component 3, and described water route seal 4 is arranged on the sidewall of water side of described RO membrane component 3, thereby avoided waste water retaining in a large number in described filter cylinder 1, realize waste water quick drain, maximized reduction concentration polarization phenomenon, extend the service life of described RO membrane component 3, reduce water consumption, improved the utilization rate of water, there is the effect of filtration high, simple in structure, the advantage such as easy to use.
Refer to Fig. 4 to Fig. 6, that Fig. 4 to Fig. 6 discloses is a kind of another kind of embodiment that gets type RO membrane cartridge structure express developed, comprise filter cylinder 1, RO membrane component 3 and filtering cartridge lid 2, described filtering cartridge lid 2 is arranged on one end of described filter cylinder 1, be that described filtering cartridge lid 2 links together with one end of described filter cylinder 1, can or be threaded togather by clamping.Described RO membrane component 3 is arranged in described filter cylinder 1 and described filtering cartridge lid 2, also comprises water route seal 4, and described water route seal 4 is arranged on the water side of described RO membrane component 3.
In the present embodiment, described water route seal 4 comprises annulus 41, circular connector 42 and lower annulus 43, the lower end of described upper annulus 41 is connected with the upper end of described lower annulus 43 by described circular connector 42, and described lower annulus 43 is set on the sidewall of water side of described RO membrane component 3.The diameter of described upper annulus 41 is less than the diameter of described lower annulus 43, on the inwall of annulus 41 and described circular connector 42, be also provided with convex tendon on described, the plane at described convex tendon place is vertical with the cross section of described upper annulus 41, and the benefit of design is to be convenient to waste water get rid of fast like this.
In the present embodiment, on described filtering cartridge lid 2, be provided with pure water apopore 200, wastewater effluent hole 300 and Yuan Shui inlet opening 100, inner surface at described filtering cartridge lid 2 is provided with pure water annular protrusion 11 and waste water annular protrusion 12, described pure water annular protrusion 11 is connected with the center water producing pipe 32 of described RO membrane component 3, be that described center water producing pipe 32 is arranged in described pure water annular protrusion 11, described center water producing pipe 32 is communicated with described pure water apopore 200 by described pure water annular protrusion 11.On described center water producing pipe 32, be provided with groove, be provided with sealing ring 400 in described groove, the effect of described sealing ring 400 is the pure water generation side leakages that prevent in center water producing pipe 32.
In the present embodiment, described waste water annular protrusion 12 is connected with described upper annulus 41, between annulus 41 and described pure water annular protrusion 11, be provided with waste water tunnel on described, be to form waste water tunnel between the inwall of described upper annulus 41, described circular connector 42 and the inwall of described pure water annular protrusion 11, the wastewater effluent end of described RO membrane component 3 communicates with described wastewater effluent hole 300 by described waste water tunnel.On annulus 41, be provided with sealing ring 400 on described, prevent the waste water generation side leakage in described waste water tunnel.
In the present embodiment, between described waste water annular protrusion 12, described water route seal 4, described RO membrane component 3 and the inwall of described filter cylinder 1, be provided with former aquaporin, described Yuan Shui inlet opening 100 communicates with the former water water inlet end of described RO membrane component 3 by described former aquaporin.
In the present embodiment, counter-infiltration diaphragm 31 in described RO membrane component 3 is wrapped on described center water producing pipe 32, and described counter-infiltration diaphragm 31 is through being folded to form water inlet flow channel and producing water flow passage, the adjacent dual-side of described water inlet flow channel and flanging is away from the part section closing seam of described center water producing pipe 32, make this dual-side approach water producing pipe 32 places, described center and form respectively segment raw water inlet, and make the side relative with flanging of water inlet flow channel form wastewater effluent mouth, in described raw water inlet, be provided with water inlet pipe, on described water inlet pipe, there are a plurality of apertures towards wastewater effluent mouth.Like this design benefit be, in raw water inlet, be provided with water inlet pipe, water inlet first flow to water inlet pipe, then from the aperture of water inlet pipe, to wastewater effluent mouth direction, spray into water inlet flow channel, make into water even, can not exist water inlet dead angle, thereby avoided fouling.
Operation principle is, former water flows to the described former aquaporin of inside of described filter cylinder 1 from described Yuan Shui inlet opening 100, from the former water water inlet end of described RO membrane component 3, enter into the inside of described RO membrane component 3, after processing, the described counter-infiltration diaphragm 31 of described RO membrane component 3 produces pure water and waste water, pure water enters into described center water producing pipe 32, through described pure water annular protrusion 11, from described pure water apopore 200, flows out.Waste water flows out from the wastewater effluent end of described RO membrane component 3, enters into described waste water tunnel, finally 300 outflows from described wastewater effluent hole.Described water route seal 4 can be separated with waste water by former water well, effectively solved the string water problems of former water and waste water, improved the salt rejection rate of described RO membrane component 3, and described water route seal 4 is arranged on the sidewall of water side of described RO membrane component 3, thereby avoided waste water retaining in a large number in described filter cylinder 1, realize waste water quick drain, maximized reduction concentration polarization phenomenon, extend the service life of described RO membrane component 3, reduce water consumption, improved the utilization rate of water, there is the effect of filtration high, simple in structure, the advantage such as easy to use.
Claims (6)
1. get type RO membrane cartridge structure express developed for one kind, comprise filter cylinder, RO membrane component and be arranged on the filtering cartridge lid of described filter cylinder one end, described RO membrane component is arranged in described filter cylinder and described filtering cartridge lid, it is characterized in that, also comprise water route seal, described water route seal is arranged on the water side of described RO membrane component.
2. the type RO membrane cartridge structure of getting express developed according to claim 1, it is characterized in that: described water route seal comprises annulus, circular connector and lower annulus, the lower end of described upper annulus is connected with the upper end of described lower annulus by described circular connector, and described lower annulus is set on the sidewall of water side of described RO membrane component.
3. the type RO membrane cartridge structure of getting express developed according to claim 2, it is characterized in that: the other end of described filter cylinder is provided with pure water apopore and wastewater effluent hole, and be provided with pure water annular protrusion at the inner surface of the other end of described filter cylinder, described pure water annular protrusion is connected with the center water producing pipe of described RO membrane component, and described center water producing pipe is communicated with described pure water apopore by described pure water annular protrusion; Described upper annulus is connected with the inwall of described filter cylinder, is provided with waste water tunnel on described between annulus and described pure water annular protrusion, and the wastewater effluent end of described RO membrane component communicates with described wastewater effluent hole by described waste water tunnel.
4. the type RO membrane cartridge structure of getting express developed according to claim 3, is characterized in that: Yuan Shui inlet opening is arranged on described filtering cartridge lid, and described Yuan Shui inlet opening communicates with the former water water inlet end of described RO membrane component.
5. the type RO membrane cartridge structure of getting express developed according to claim 2, it is characterized in that: on described filtering cartridge lid, be provided with pure water apopore, He Yuanshui inlet opening, wastewater effluent hole, inner surface at described filtering cartridge lid is provided with pure water annular protrusion and waste water annular protrusion, described pure water annular protrusion is connected with the center water producing pipe of described RO membrane component, and described center water producing pipe is communicated with described pure water apopore by described pure water annular protrusion; Described waste water annular protrusion is connected with described upper annulus, is provided with waste water tunnel on described between annulus and described pure water annular protrusion, and the wastewater effluent end of described RO membrane component communicates with described wastewater effluent hole by described waste water tunnel.
6. the type RO membrane cartridge structure of getting express developed according to claim 5, it is characterized in that: between described waste water annular protrusion, described water route seal, described RO membrane component and the inwall of described filter cylinder, be provided with former aquaporin, described Yuan Shui inlet opening communicates with the former water water inlet end of described RO membrane component by described former aquaporin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420001300.7U CN203737108U (en) | 2014-01-02 | 2014-01-02 | Quickly washed type RO (reverse osmosis) membrane filtering element structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420001300.7U CN203737108U (en) | 2014-01-02 | 2014-01-02 | Quickly washed type RO (reverse osmosis) membrane filtering element structure |
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| Publication Number | Publication Date |
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| CN203737108U true CN203737108U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420001300.7U Expired - Fee Related CN203737108U (en) | 2014-01-02 | 2014-01-02 | Quickly washed type RO (reverse osmosis) membrane filtering element structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185408A (en) * | 2017-07-25 | 2017-09-22 | 佛山市顺德区盈沣泰环保科技有限公司 | A kind of its components |
| CN109912059A (en) * | 2017-12-13 | 2019-06-21 | 九阳股份有限公司 | A kind of reverse osmosis composite filter element component |
| CN111039356A (en) * | 2019-12-30 | 2020-04-21 | 浙江艾波特环保科技股份有限公司 | RO membrane filter core subassembly |
| CN114632421A (en) * | 2020-12-16 | 2022-06-17 | 北京清源洁华膜技术有限公司 | Roll type membrane set |
-
2014
- 2014-01-02 CN CN201420001300.7U patent/CN203737108U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185408A (en) * | 2017-07-25 | 2017-09-22 | 佛山市顺德区盈沣泰环保科技有限公司 | A kind of its components |
| CN109912059A (en) * | 2017-12-13 | 2019-06-21 | 九阳股份有限公司 | A kind of reverse osmosis composite filter element component |
| CN109912059B (en) * | 2017-12-13 | 2021-12-03 | 九阳股份有限公司 | Reverse osmosis composite filter element assembly |
| CN111039356A (en) * | 2019-12-30 | 2020-04-21 | 浙江艾波特环保科技股份有限公司 | RO membrane filter core subassembly |
| CN114632421A (en) * | 2020-12-16 | 2022-06-17 | 北京清源洁华膜技术有限公司 | Roll type membrane set |
| CN114632421B (en) * | 2020-12-16 | 2023-01-10 | 北京清源洁华膜技术有限公司 | Roll type membrane set |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140730 Termination date: 20210102 |