CN102860246B - Jet oscillation drop irrigation emitter - Google Patents
Jet oscillation drop irrigation emitter Download PDFInfo
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- CN102860246B CN102860246B CN201210389340.9A CN201210389340A CN102860246B CN 102860246 B CN102860246 B CN 102860246B CN 201210389340 A CN201210389340 A CN 201210389340A CN 102860246 B CN102860246 B CN 102860246B
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- fluidic
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- jet
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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Abstract
The invention discloses a jet oscillation drop irrigation emitter which is composed of a water inlet channel, a jet element and a runner body, wherein the water inlet channel is provided with a filter window and is connected with an inlet of the jet element, an outlet of the jet element is connected with an inlet of the runner body, and a water outlet channel is arranged at the tail end of the runner body. Water flow is driven to flow intermittently in two runners by using the Coanda technology and the negative pressure control oscillation technology to achieve the continuous oscillation and pulse process, strong turbulence and impact water flow form in the runners, and blocking resistance and irrigation uniformity of the emitter are improved. Elastic body structures such as rubber, plastic films and springs of the existing drop irrigation pulse generator are omitted, and the jet oscillation drop irrigation emitter has the advantages of being simple in structure and strong in reliability and durability. Materials, processing devices and processing methods of the existing drop irrigation emitter can be adopted, once injection forming is used, and the jet oscillation drop irrigation emitter is simple in processing technique, low in manufacture cost and convenient to install and use. The oscillation pulse drop irrigation emitter in various structural modes can be manufactured, and the jet oscillation drop irrigation emitter can be widely applied to irrigation of field crops, vegetables, forestry, the fruit industry and the like.
Description
Technical field
The invention belongs to agricultural water-saving irrigation technical field, relate to drip emitter, be specifically related to fluidic oscillation drip emitter.
Background technology
Pulse drip irrigation has the advantages that performance of anti-blockage is strong, uniformity of irrigation water appilcation is high, is subject to extensive concern and the application of countries in the world.Existing impulse generator is the core apparatus that the pressure flow in drip irrigation system is become to pulse water flow, and impulse generator mostly has inflatable and a reset flexible cavity, and flexible cavity is made up of rubber, plastic diaphragms or spring elastomeric material.Pressure flow enters flexible cavity, and cavity starts to expand, along with press water constantly accumulation in cavity, cavity expand into extremely and prescribes a time limit, be opened at the effect such as diaphragm or spring lower outlet, the pressure flow in cavity releases by exhalant canal rapidly, completes pulsatile once.After the press water in flexible cavity is by abrupt release, cavity recovers reset condition under elastic reaction, and delivery port is closed, and enters next pulse process.Move in circles, form pulse water flow.Utilize expansion and the reset of rubber, plastics, spring elastomeric material, realize the object of pulse water flow.Drip irrigation system is longer general running time, and elastomeric material, in long-time, high-frequency frequent back and forth running, is easy to fatigue, even damages; Pulse frequency depends on rigidity and the initial compression amount of elastomeric material, long-play will cause elastomeric material rigidity and elastic modelling quantity to change, elasticity attenuation, the decline that sensitivity, reliability can be in various degree, thus affect lasting operation and the use of impulse type drip irrigation system; The use of elastomeric material certainly will increase the structural complexity of impulse generator, and mechanical seal, the accuracy of manufacture, reliability and durability are proposed to higher requirement.
Application number is that 201210074776.9 Chinese patent " a kind of oscillating impulse drip emitter and drip irrigation method " discloses a kind of drip emitter with positive feedback formula oscillating impulse generator, its impulse generator has two feedback channels, by the pressure signal of delivery outlet separately being fed back to the control mouth of homonymy, realize the switching of jet, form pulse water flow.Application number is the positive feedback formula jet pulse drip emitter that 201210074708.2 Chinese patent " a kind of jet pulse drip emitter and drip irrigation method " discloses a kind of dissymmetrical structure, its impulse generator has single feedback channel, by the pressure signal of straight delivery outlet being fed back to the control mouth of direct projection stream side, realize the switching of jet to oblique delivery outlet, and by not to becoming structure to make jet return to straight delivery outlet, form pulse water flow.The oscillating impulse frequency of positive feedback formula oscillating impulse generator is high, more difficult grasp when design and application.
Summary of the invention
The object of the present invention is to provide one simple in structure, cost is low, and anti-blockage capability is strong, and long service life utilizes jet vectoring oscillation technology to form the fluidic oscillation drip emitter of pulse water flow.
The technical solution that the present invention takes is: a kind of fluidic oscillation drip emitter, it is characterized in that: formed by intake chamber, fluidic and runner body, intake chamber is provided with filter window and is communicated with the import of fluidic, and the outlet of fluidic is communicated with the import of runner body; Described fluidic is made up of nozzle, control channel, control port I, control port II, fluidic spaces, sidewall II, sidewall I, splitter plate, delivery outlet I, delivery outlet II; Fluidic be nozzle foremost, control port I and control port II are set respectively on the sidewall on jet expansion both sides, control port I and control port II are communicated with by control channel, it after nozzle, is the fluidic spaces of one section of pre-small post-large shape, the both sides of fluidic spaces are respectively sidewall II and sidewall I, splitter plate is positioned at the end of fluidic spaces, and the end of fluidic spaces is partitioned into delivery outlet I and delivery outlet II.
Described intake chamber is considered window and contraction section by water inlet and is formed, and intakes after considering window by water inlet and enters contraction section, connects nozzle 3 after contraction section.
Described runner body is made up of two runners and effluent trough, and two runners are communicated with two delivery outlets of fluidic respectively, and wherein delivery outlet I is communicated with runner I, and delivery outlet II is communicated with runner II; The end of described runner body sets out tank.Flow passage structure form can be the runner forms such as labyrinth type, flow around type, long flow channel type, aperture.
Described nozzle width is the spacing of nozzle left side wall and right side wall, and the codomain of nozzle width is 0.4 mm～3mm; Potential difference is minimum range between sidewall II and the left side wall of fluidic spaces of nozzle or the minimum range between the right side wall of nozzle and the sidewall I of fluidic spaces, and the ratio of potential difference and nozzle width is 1:0.3～1:1.5; Described splitting apart from being the length of nozzle to splitter plate top, splitting distance is 1:3～1:15 with the ratio of nozzle width; Subtended angle is the angle of the right side wall of the sidewall II of fluidic spaces and the angle of the left side wall of nozzle or the sidewall I of fluidic spaces and nozzle, and subtended angle is 6 °～20 °; Nozzle depth is the spacing at nozzle front and the back side, and the ratio of nozzle depth and nozzle width is 1:1～1:2.
The effluent trough of described runner body end arranges one or two; In the time that two effluent troughs are set, effluent trough I is positioned at runner I end, and effluent trough II is positioned at runner II end; In the time that an effluent trough is set, remove the dividing plate between effluent trough I and effluent trough II, effluent trough I is communicated with effluent trough II and becomes an effluent trough.
Described splitter plate top can be wedge shape or arcs of recesses, and runner I and the runner II type that can be in line is arranged or U-shaped arrangement.
When the present invention works, pressure flow in hollow billet enters intake chamber by filtering window, form jet by jet nozzle, jet by nozzle laggard enter fluidic spaces, due to fluidic geometry-disorder that small asymmetry and jet itself exist, jet entrainment interference effect between two side walls by asymmetric, produce pressure reduction in jet both sides, this pressure reduction promotes the deflection of jet, to produce wall attachment effect, be attached on a side wall surface of fluidic spaces, flow along wall, arrive the delivery outlet of this side.Suppose that the first attached wall of jet is in sidewall I, and flow along this wall, arrive delivery outlet I, ooze by the effluent trough of runner I tail end.Now, the effect of entrainmenting of jet, to produce at control port I place negative pressure, along with continuing of jet, negative pressure will be delivered to control port II by control channel, act on the jet of control port II one side, both sides at jet produce pressure reduction, jet is deflected, and attached wall, in the wall of sidewall II, flows to delivery outlet II along this side wall surface.Similarly, due to the effect of entrainmenting of jet, to produce at control port II place negative pressure, along with continuing of jet, negative pressure will be delivered to control port I by control channel, act on the jet of control port I one side, both sides at injection stream produce pressure reduction, and jet is deflected again, and current return to the wall of sidewall I, flow to delivery outlet I along this side wall surface, form one time oscillating impulse process.So move in circles, by the flow oscillation of fluidic, in two runners, produce pulse water flow respectively.
Beneficial effect of the present invention: the present invention is due to application controls fluidic oscillation technology, switch jet direction, order about current intermittent flowing in two runners, realize lasting oscillatory process, in runner, form strong turbulent fluctuation and impact current, be of value to and wash away runner, improve solidfied material transport capability, increase the anti-blockage capability of douche; The strong turbulent fluctuation of current has ensured that douche has efficient effect of energy dissipation, is conducive to reduce the flow stance index of douche, drips more even; Save the elastomer structure such as rubber, plastic foil, spring of existing pulse drip emitter, simplified the structure of pulse drip emitter, make the operation of impulse generator more reliable, lasting; Fluidic adopts negative pressure control commutation, and oscillating impulse frequency is easy to grasp, and is convenient to develop the pulse drip emitter that meets different frequency of oscillation demands.Fluidic oscillation drip emitter is without any attachment device, material can be identical with existing conventional drip emitter material, only need exploitation fluidic oscillation drip emitter mould, can adopt processing technology, the method and apparatus of existing drip emitter or drip irrigation pipe belt to carry out injection moulding, processing and moulding, processing technology is simple, manufacturing cost is lower, easy to install.The present invention can construct the pulse drip emitter of various structures form, can extensively be adapted to the demand that field crop, vegetables, industry of planting forest or fruit tress etc. are irrigated.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the orthogonal view of the embodiment of the present invention 1.
Fig. 2 is the enlarged diagram of the fluidic part of embodiment 1.
Fig. 3 is the schematic three dimensional views of embodiment 1.
Fig. 4 is the orthogonal view of the embodiment of the present invention 2.
Fig. 5 is the enlarged diagram of the fluidic part of embodiment 2.
Fig. 6 is the schematic three dimensional views of embodiment 2.
In figure, 1. water inlet is considered window 2. contraction section 3. nozzle 4. control channel 5. control port I 6. control port II 7. fluidic spaces 8. sidewall II 9. sidewall I 10. splitter plate 11. delivery outlet I 12. delivery outlet II 13. runner I 14. runner II 15. effluent trough I 16. effluent trough II B. nozzle width S. potential difference L. split apart from θ. and subtended angle E. intake chamber F. fluidic C. runner body
Detailed description of the invention
embodiment 1:
With reference to Fig. 1 and Fig. 3, the fluidic oscillation drip emitter shown in this embodiment is made up of intake chamber E, fluidic F and runner body C, and intake chamber E is provided with filter window 1 and is communicated with the import of fluidic F, and the outlet of fluidic F is communicated with the import of runner body C; Described fluidic F is made up of nozzle 3, control channel 4, control port I 5, control port II 6, fluidic spaces 7, sidewall II 8, sidewall I 9, splitter plate 10, delivery outlet I 11, delivery outlet II 12; Fluidic F's is nozzle 3 foremost, nozzle 3 exports on the sidewall on both sides control port I 5 and control port II 6 is set respectively, control port I 5 and control port II 6 are communicated with by control channel 4, it after nozzle 3, is the fluidic spaces 7 of one section of pre-small post-large shape, the both sides of fluidic spaces 7 are respectively sidewall II 8 and sidewall I 9, splitter plate 10 is positioned at the end of fluidic spaces 7, and the end of fluidic spaces 7 is partitioned into delivery outlet I 11 and delivery outlet II 12.
With reference to Fig. 1 and Fig. 3, intake chamber E considers window 1 by water inlet and forms with contraction section 2, after water inlet is considered window 1 by water inlet, enters contraction section 2, and contraction section 2 connects nozzle 3 below.Runner body C is made up of two runners and effluent trough, and two runners are communicated with two delivery outlets of fluidic F respectively, and wherein delivery outlet I 11 is communicated with runner I 13, and delivery outlet II 12 is communicated with runner II 14.The end of runner body C arranges two effluent troughs, and effluent trough I 15 is positioned at runner I 13 ends, and effluent trough II 16 is positioned at runner II 14 ends.The wedge shape that splitter plate 10 tops are indent, runner I 13 and runner II 14 type that is in line is respectively arranged.
With reference to Fig. 2, nozzle width B is 0.8mm, and the ratio of potential difference S and nozzle width B is 1:0.5, and splitting apart from the ratio of L and nozzle width B is 1:8.5, and subtended angle θ is 11.7 °, and the ratio of nozzle depth and nozzle width B is 1:1.2.
Specific implementation process: the pressure flow in hollow billet enters intake chamber E by filtering window 1, then enter nozzle 3 through contraction section 2, by the rear formation jet of nozzle 3, enter fluidic spaces 7, due to the small asymmetry of fluidic F geometry and the disorder of jet existence itself, jet entrainment interference effect between two side walls by asymmetric, produce pressure reduction in jet both sides, this pressure reduction promotes the deflection of jet, to produce wall attachment effect, be attached on a side wall surface of fluidic spaces, flow along wall, arrive the delivery outlet of this side.Suppose that the first attached wall of jet is in sidewall I 8, and flow along this wall, arrive delivery outlet I 11, ooze by the effluent trough I 15 of runner I 13 tail ends.Now, due to the effect of entrainmenting of jet, to produce negative pressure at control port I 5 places, along with continuing of jet, negative pressure will be delivered to control port II 6 by control channel 4, act on the jet of control port II 6 one sides, both sides at nozzle 3 jets produce pressure reduction, and the pressure of control port I 5 one sides is greater than the pressure of control port II 6 one sides, and jet is deflected, attached wall, in the wall of sidewall II 8, flows to delivery outlet II 12 along this side wall surface.Similarly, due to the effect of entrainmenting of jet, to produce negative pressure at control port II 6 places, along with continuing of jet, negative pressure will be delivered to control port I 5 by control channel 4, act on the jet of control port I 5 one sides, jet both sides at jet expansion produce pressure reduction, the pressure of control port II 6 one sides is greater than the pressure of control port I 5 one sides, jet is deflected again, jet returns to the wall of sidewall I 9, flows to delivery outlet I 11 along this side wall surface, forms one time oscillating impulse process.So move in circles, by the flow oscillation of fluidic, in two runners, produce pulse water flow respectively.Utilize pulse process strong water impact frequently, wash away and carry the easy obstruction material of drip irrigation system, improve the anti-blockage capability of douche.The intense impact that pulse water flow causes, makes current in runner produce violent turbulent fluctuation, has strengthened the effect of energy dissipation of runner, can reduce the flow stance index of douche, improves the uniformity of water outlet.
Embodiment 2:
With reference to Fig. 4, Fig. 6, basic structural feature is similar to embodiment 1, is with the difference of embodiment 1 circular arc that splitter plate 10 tops are indent, and runner I 13 becomes respectively U-shaped arrangement with runner II 14, difference to some extent in size.With reference to Fig. 5, nozzle width B is 0.6mm, and the ratio of potential difference S and nozzle width B is 1:0.6, and splitting apart from the ratio of L and nozzle width B is 1:10, and subtended angle θ is 16.3 °, and the ratio of nozzle depth and nozzle width B is 1:1.3.
Fluidic oscillation drip emitter of the present invention fully discloses by embodiment, but described embodiment is not in order to limit the present invention, also can have other embodiment under the prerequisite that does not depart from spirit of the present invention or essential characteristic.As to filter window can be the form such as perforated grill, porous array, the position of filter window can also be in the side of intake chamber; Multiple intake chambers can be set, and intake chamber structure, shape can be the multiple geometries such as circular, oval, trapezoidal, triangle; Contraction section can be positioned at intake chamber end, becomes a contraction mouth, and diversion section is directly communicated with intake chamber, and diversion section can be that rectangular channel can be also circular trough; Splitter plate end face can be cambered surface, plane etc.; Fluidic spaces can also be other pre-small post-large geometric figures such as various trapezoidal, triangles, arc enlarging; Runner can have arrangement modes more than two rows, and flow passage structure can also be the forms such as flow around type, long flow channel type, aperture and various labyrinth paths, and two effluent troughs can be arranged in two different directions.In the time showing scope of the present invention, should be with reference to appending claims, instead of aforesaid explanation.
Claims (6)
1. a fluidic oscillation drip emitter, it is characterized in that: formed by intake chamber (E), fluidic (F) and runner body (C), intake chamber (E) is provided with filter window (1) and is communicated with the import of fluidic (F), and the outlet of fluidic (F) is communicated with the import of runner body (C), described fluidic (F) is made up of nozzle (3), control channel (4), control port I (5), control port II (6), fluidic spaces (7), sidewall II (8), sidewall I (9), splitter plate (10), delivery outlet I (11), delivery outlet II (12), fluidic (F) be nozzle (3) foremost, on the sidewall on nozzle (3) outlet both sides, control port I (5) and control port II (6) are set respectively, control port I (5) and control port II (6) are communicated with by control channel (4), it after nozzle (3), is the fluidic spaces (7) of one section of pre-small post-large shape, the both sides of fluidic spaces (7) are respectively sidewall II (8) and sidewall I (9), splitter plate (10) is positioned at the end of fluidic spaces (7), and the end of fluidic spaces (7) is partitioned into delivery outlet I (11) and delivery outlet II (12), the spacing of described nozzle (3) left side wall and right side wall is nozzle width (B), and the codomain of nozzle width (B) is 0.4 mm～3mm, minimum range between minimum range between the sidewall II (8) of the left side wall of described nozzle (3) and fluidic spaces (7) or the right side wall of nozzle (3) and the sidewall I (9) of fluidic spaces (7) is potential difference (S), and potential difference (S) is 1:0.3～1:1.5 with the ratio of nozzle width (B), described nozzle (3) is to the length on splitter plate (10) top for splitting apart from (L), and splitting apart from (L) is 1:3～1:15 with the ratio of nozzle width (B), the sidewall II (8) of described fluidic spaces (7) is subtended angle (θ) with the angle of the left side wall of nozzle (3) or the sidewall I (9) of fluidic spaces (7) with the angle of the right side wall of nozzle (3), and subtended angle (θ) is 6 °～20 °, described nozzle (3) the spacing positive and back side is nozzle depth, and the ratio of nozzle depth and nozzle width (B) is 1:1～1:2.
2. a kind of fluidic oscillation drip emitter according to claim 1, it is characterized in that, described intake chamber (E) is made up of water inlet filter window (1) and contraction section (2), after water inlet is filtered window (1) by water inlet, enters contraction section (2), and contraction section (2) connects nozzle (3) below.
3. a kind of fluidic oscillation drip emitter according to claim 1 and 2, it is characterized in that, described runner body (C) is made up of two runners and effluent trough, article two, runner is communicated with two delivery outlets of fluidic (F) respectively, wherein delivery outlet I (11) is communicated with runner I (13), and delivery outlet II (12) is communicated with runner II (14); The end of described runner body (C) sets out tank.
4. a kind of fluidic oscillation drip emitter according to claim 3, is characterized in that, the effluent trough of described runner body (C) end arranges one or two; In the time that two effluent troughs are set, effluent trough I (15) is positioned at runner I (13) end, and effluent trough II (16) is positioned at runner II (14) end; In the time that an effluent trough is set, remove the dividing plate between effluent trough I (15) and effluent trough II (16), effluent trough I (15) is communicated with and becomes an effluent trough with effluent trough II (16).
5. a kind of fluidic oscillation drip emitter according to claim 3, is characterized in that, described runner I (13) and runner II (14) type that is in line is arranged or become U-shaped arrangement.
6. a kind of fluidic oscillation drip emitter according to claim 1, is characterized in that, wedge shape or circular arc that described splitter plate (10) top is indent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210389340.9A CN102860246B (en) | 2012-10-15 | 2012-10-15 | Jet oscillation drop irrigation emitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210389340.9A CN102860246B (en) | 2012-10-15 | 2012-10-15 | Jet oscillation drop irrigation emitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102860246A CN102860246A (en) | 2013-01-09 |
| CN102860246B true CN102860246B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210389340.9A Expired - Fee Related CN102860246B (en) | 2012-10-15 | 2012-10-15 | Jet oscillation drop irrigation emitter |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111887131A (en) * | 2020-07-29 | 2020-11-06 | 江苏西美灌排设备有限公司 | High-coverage irrigation device |
| CN113940256B (en) * | 2021-10-14 | 2022-04-22 | 中国农业科学院农业环境与可持续发展研究所 | Variable high-blockage-resistance irrigator and irrigation method |
| CN114303892B (en) * | 2022-01-19 | 2024-01-23 | 山东中科先进技术有限公司 | Load feedback jet flow pulse dripper and drip irrigation system |
| CN114223507A (en) * | 2022-02-10 | 2022-03-25 | 山东中科先进技术研究院有限公司 | Positive pressure feedback jet pulse water dropper and drip irrigation system |
| CN114223508A (en) * | 2022-02-10 | 2022-03-25 | 山东中科先进技术研究院有限公司 | Jet oscillator water dropper and drip irrigation system |
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|---|---|---|---|---|
| CN2525791Y (en) * | 2002-02-21 | 2002-12-18 | 复旦大学 | Drip irrigator with jet oscillator |
| GB2443396A (en) * | 2006-10-30 | 2008-05-07 | Univ Sheffield | Bubble generation for aeration and other purposes |
| CN102577911A (en) * | 2012-03-21 | 2012-07-18 | 江苏大学 | Jet flow pulse drip irrigation emitter and drip irrigation method |
| CN102599036A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Oscillation pulsed drip irrigation emitter and drip irrigation device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729564B2 (en) * | 2000-07-21 | 2004-05-04 | Bowles Fluidics Corporation | Fluidic SPA Nozzles with dual operating modes and methods |
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2012
- 2012-10-15 CN CN201210389340.9A patent/CN102860246B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2525791Y (en) * | 2002-02-21 | 2002-12-18 | 复旦大学 | Drip irrigator with jet oscillator |
| GB2443396A (en) * | 2006-10-30 | 2008-05-07 | Univ Sheffield | Bubble generation for aeration and other purposes |
| CN102577911A (en) * | 2012-03-21 | 2012-07-18 | 江苏大学 | Jet flow pulse drip irrigation emitter and drip irrigation method |
| CN102599036A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Oscillation pulsed drip irrigation emitter and drip irrigation device |
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| CN102860246A (en) | 2013-01-09 |
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Address after: Lishui Economic Development Zone of Nanjing City, Jiangsu province 211215 zhe Ning Road No. 368 Applicant after: Jiangsu University Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Applicant before: Jiangsu University |
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Address after: 212114 Zhenjiang, Zhejiang Province, Dantu high capital street, Xiangshan Road, No. 1 Patentee after: Jiangsu University Address before: Lishui Economic Development Zone of Nanjing City, Jiangsu province 211215 zhe Ning Road No. 368 Patentee before: Jiangsu University |
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Granted publication date: 20141203 Termination date: 20161015 |