CN101294134A - Full water freezen protection system of solar biogas generating pit in sharp frost area - Google Patents
Full water freezen protection system of solar biogas generating pit in sharp frost area Download PDFInfo
- Publication number
- CN101294134A CN101294134A CNA2008100647957A CN200810064795A CN101294134A CN 101294134 A CN101294134 A CN 101294134A CN A2008100647957 A CNA2008100647957 A CN A2008100647957A CN 200810064795 A CN200810064795 A CN 200810064795A CN 101294134 A CN101294134 A CN 101294134A
- Authority
- CN
- China
- Prior art keywords
- water
- pump
- solar energy
- water outlet
- water inlet
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/24—Heat exchange systems, e.g. heat jackets or outer envelopes inside the vessel
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M43/00—Combinations of bioreactors or fermenters with other apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/59—Biological synthesis; Biological purification
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Organic Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Genetics & Genomics (AREA)
- Microbiology (AREA)
- Sustainable Development (AREA)
- Biotechnology (AREA)
- Biomedical Technology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
An all-water anti-freezing system for a solar biogas digester in a severe cold area adopts water as a heat exchange medium to solve the problems of prior anti-freezing system for the solar biogas digester such as high cost, poor heat exchange effect, high energy consumption, and inconvenience in generalization in the rural areas. In the invention, the water outlet of a circulating pump is connected with the water inlet of a solar energy collector; a water check valve is arranged on a water circulating pipe between the water outlet of the circulating pump and the water inlet of the solar energy collector; the water outlet of the solar energy collector and the water outlet of a water supply pump are connected with the water inlet of a heating coil; the water inlet of the circulating pump and the water inlet of a drain pump are connected with the outer outlet of the heating coil; the water inlet of the water supply pump is connected with the water outlet of a water storage tank; and the water outlet of the drain pump is connected with the water inlet of the water storage tank. By adopting the water circulating system as the heat exchange medium, the all-water anti-freezing system has the advantages of good heat exchange effect, lower system cost and lower energy consumption, and facilitates generalization in rural areas.
Description
Technical field
The present invention relates to the solar-energy methane pit winterization system of a kind of water as heat transferring medium.
Background technology
China's people in the countryside quantity is big, and the residing particular surroundings in rural area has advantageous advantage in rural development biogas project, and national Eleventh Five-Year Plan is encouraged rural development biogas project energetically.Biogas not only can solve life in the countryside energy problem as renewable energy source, can also protect and improve the ecological environment, and improves agricultural product quality, thereby increases the peasant economy benefit, so development biogas is one of approach that realizes the rural economy Sustainable development.
But biogas fermentation is limited by temperature condition, aerogenesis no longer almost when the methane-generating pit temperature is lower than 10 ℃ above freezing.According to experimental result, northern area (Harbin and peripheral counties and cities etc.) is if to the heating of underground methane-generating pit or take special measure, and temperature will reach below 0 ℃ in the low temperature season pond.This moment not only can aerogenesis, also can the bursting by freezing methane-generating pit.Occurred at present utilizing firing the method that the pond heats to methane-generating pit, promptly outside the biogas pool wall, made flue, heating methane tanks such as burning sawdust, but construction of this method and management are got up all pretty troublesome.And research at present is to heat to methane-generating pit with sun power the most widely, but still there are shortcomings such as initial cost is big, energy-saving effect is relatively poor in the solar biogas cell system; At cold district, there is the solar energy system problem of freezing.Common solution generally has two kinds: a kind of is as system's heat transferring medium with deicing fluid, but with regard to present market value, ethylene glycol market value per ton is between 8500～9000 yuan, for the required solar energy system of domestic methane tank heating, at least must invest thousands of units, and deicing fluid specific heat is little, with water than heat exchange weak effect; Another method is at the heat collector place heating tape to be set, antifreeze with Electric heating, according to experiment test, even when fine, also have only every day to utilize the solar heating methane-generating pit non hor am to time between at 4 o'clock in afternoon, and in a very long time, but just utilize the anti-locking system of electric heating to freeze, cause huge electric energy loss, increase working cost, be unfavorable for promoting in the Rural areas.
Summary of the invention
The present invention is that the price that exists for the antifreezing solar energy system that solves existing solar-energy methane pit is expensive, the heat exchange effect is relatively poor, energy consumption is higher, is unfavorable for providing a kind of full water freezen protection system of solar biogas generating pit in sharp frost area in the problem of Rural areas popularization.The present invention includes solar energy collector, automatic exhaust steam valve, heating coil, water circulating pump, Water Check Valve, the sluicing pump, water tank, airway and small pump, automatic exhaust steam valve is arranged on the water circulation pipe at solar energy collector water outlet place, airway is arranged on the water tank, the water outlet of water circulating pump is connected with the water inlet of solar energy collector, Water Check Valve is arranged on the water circulation pipe between the water inlet of the water outlet of water circulating pump and solar energy collector, the water outlet of solar energy collector all is connected with the water inlet of heating coil with the water outlet of small pump, the water inlet of the water inlet of water circulating pump and sluicing pump all is connected with the water outlet of heating coil, the water inlet of small pump is connected with the water outlet of water tank, and the water outlet of sluicing pump is connected with the water inlet of water tank.
Beneficial effect: the present invention adopts water circulation system as heat transferring medium, compares with the system that adopts deicing fluid, has the advantage that the heat exchange effect is better, system cost is lower; With compare with the antifreeze solar energy system of heating tape, have the lower advantage of energy consumption, be beneficial in the Rural areas and promote the use of.
Description of drawings
Fig. 1 is an apparatus structure synoptic diagram of the present invention; Fig. 2 is the structural representation of embodiment three.
Embodiment
Embodiment one: referring to Fig. 1, present embodiment is by solar energy collector 1, automatic exhaust steam valve 2, heating coil 4, water circulating pump 7, Water Check Valve 8, sluicing pump 9, water tank 10, airway 11 and small pump 12 are formed, automatic exhaust steam valve 2 is arranged on the water circulation pipe at solar energy collector 1 water outlet place, heating coil 4 is arranged in the methane-generating pit 18, airway 11 is arranged on the water tank 10, the water outlet of water circulating pump 7 is connected with the water inlet of solar energy collector 1, Water Check Valve 8 is arranged on the water circulation pipe between the water inlet of the water outlet of water circulating pump 7 and solar energy collector 1, the water outlet of the water outlet of solar energy collector 1 and small pump 12 all is connected with the water inlet of heating coil 4, the water inlet of the water inlet of water circulating pump 7 and sluicing pump 9 all is connected with the water outlet of heating coil 4, the water inlet of small pump 12 is connected with the water outlet of water tank 10, and the water outlet of sluicing pump 9 is connected with the water inlet of water tank 10.
In temperature higher season, do not have system's problem of freezing, and the sunshine duration in summer is long, therefore the illumination abundance does not need system implementation sluicing emptying operation, and out of service and front and back valve is all closed with sluicing pump 9, and the preceding gate valve of Water Check Valve 8 is also closed.
In temperature lower season, need sluicing pump 9 and small pump 12 to finish the operation of water cycle winterization system, this moment, the preceding gate valve of vacuum breaker 8 was normally open.Before the operation of water cycle winterization system, earlier with topped up with water in the water tank 10; When solar irradiation intensity is increased to a certain degree, starting small pump 12 is the water circulation system moisturizing, the air of water circulation system middle and upper part is by automatic exhaust steam valve 2 emptyings, the vent valve emptying that the air of bottom carries by water trap 3 and water collector 5 in the moisturizing process; After moisturizing finishes, close small pump 12 and start water circulating pump 7 simultaneously, give water in water circulation system heating by solar energy collector 1 this moment, and recirculated water reaches methane-generating pit 18 with heat; When the solar irradiation strength reduction to a certain degree the time, close water circulating pump 7 and start sluicing pump 9 simultaneously, the water in the water circulation system is drained in the water tank 10, the air in the water tank 10 is discharged by airway 11; In the emptied of water recycle system in the process of water, it is the water cycle system that air enters by Water Check Valve 8, makes in the water circulation system not resident water, can not freeze under low-temperature condition.
Embodiment two: referring to Fig. 1, present embodiment has increased sluicing timer 15 and moisturizing timer 17 on the basis of embodiment one, sluicing timer 15 is arranged on the current supply circuit of sluicing pump 9, and moisturizing timer 17 is arranged on the current supply circuit of small pump 12.The device that uses present embodiment can be that sluicing timer 15 and moisturizing timer 17 are set the working hour according to the local climatological data of record, to realize automatization control after for some time.
Embodiment three: referring to Fig. 2, present embodiment has increased controller 13 on the basis of embodiment one, temperature sensor 14 and light intensity sensor 16, temperature sensor 14 is arranged on the pipeline at solar energy collector 1 water outlet place, light intensity sensor 16 is arranged on the solar energy acquisition face of solar energy collector 1, the signal output part of temperature sensor 14 is connected with the temperature signal input terminus of controller 13, the signal output part of light intensity sensor 16 is connected with the illumination signal input part of controller 13, the control input end of water circulating pump 7 is connected with the cycle control output terminal of controller 13, the control input end of sluicing pump 9 is connected with the sluicing control output end of controller 13, and the control input end of small pump 12 is connected with the moisturizing control output end of controller 13.
Before the operation of water cycle winterization system, earlier with topped up with water in the water tank 10; The light intensity sensor 16 that is arranged on the solar energy collector 1 passes to controller 13 with the solar irradiation signal, when solar irradiation intensity is higher than set(ting)value, it is the water circulation system moisturizing that controller 13 starts small pump 12, and controller 13 cut out small pump 12 after moisturizing finished; The temperature sensor 14 that is arranged on the pipeline at solar energy collector 1 water outlet place passes to controller 13 with temperature signal, when temperature is higher than set(ting)value, controller 13 starts water circulating pump 7, give water in water circulation system heating by solar energy collector 1 this moment, and recirculated water conducts to methane-generating pit 18 with heat; When the water temperature at solar energy collector 1 water outlet place was lower than set(ting)value, controller 13 cut out water circulating pump 7 and starts sluicing pump 9 simultaneously, and the water in the water circulation system is drained in the water tank 10.
Embodiment four: referring to Fig. 1 or Fig. 2, present embodiment has increased water trap 3 and water collector 5 on embodiment one or three basis, water trap 3 is arranged on the water circulation pipe at water inlet place of heating coil 4, and water collector 5 is arranged on the water circulation pipe at water outlet place of heating coil 4.Water trap 3 and water collector 5 are used to control methane-generating pit internal heating coil pipe and open way, and the vent valve that carries on water trap 3 and the water collector 5 has the effect of exhausted air.
Embodiment five: present embodiment and embodiment one or threes' difference is that described water tank 10 is attemperater.At night or cloudy snow weather, the heat transferring medium in the water circulation system leaves in the attemperater, has reduced thermosteresis largely, and has reduced antifreeze other investment that needs increase of system.According to experiment test, in Border in Harbin Area low temperature season morning, temperature be about-12 ℃ in the outdoor solar energy system pipe, under the situation without heating tape, needs about 4 hours time photograph solarization system, and system can move, and has reduced system operation time.In the present embodiment, that attemperater places is indoor, in cowshed or the warmhouse booth (according to test result, the temperature of low temperature season cowshed is more than 5-10 ℃), can keep comparatively ideal initial temperature; When the sun reaches intensity of illumination, get final product operational system, prolonged working time, strengthened heats.
Claims (5)
1, full water freezen protection system of solar biogas generating pit in sharp frost area, it comprises solar energy collector (1), automatic exhaust steam valve (2), heating coil (4), water circulating pump (7), Water Check Valve (8), sluicing pump (9), water tank (10), airway (11) and small pump (12), automatic exhaust steam valve (2) is arranged on the water circulation pipe at solar energy collector (1) water outlet place, airway (11) is arranged on the water tank (10), the water outlet that it is characterized in that water circulating pump (7) is connected with the water inlet of solar energy collector (1), Water Check Valve (8) is arranged on the water circulation pipe between the water inlet of the water outlet of water circulating pump (7) and solar energy collector (1), the water outlet of the water outlet of solar energy collector (1) and small pump (12) all is connected with the water inlet of heating coil (4), the water inlet of the water inlet of water circulating pump (7) and sluicing pump (9) all is connected with the water outlet of heating coil (4), the water inlet of small pump (12) is connected with the water outlet of water tank (10), and the water outlet of sluicing pump (9) is connected with the water inlet of water tank (10).
2, full water freezen protection system of solar biogas generating pit in sharp frost area according to claim 1, it is characterized in that it also comprises sluicing timer (15) and moisturizing timer (17), sluicing timer (15) is arranged on the current supply circuit of sluicing pump (9), and moisturizing timer (17) is arranged on the current supply circuit of small pump (12).
3, full water freezen protection system of solar biogas generating pit in sharp frost area according to claim 1, it is characterized in that it also comprises controller (13), temperature sensor (14) and light intensity sensor (16), temperature sensor (14) is arranged on the pipeline at solar energy collector (1) water outlet place, light intensity sensor (16) is arranged on the solar energy acquisition face of solar energy collector (1), the signal output part of temperature sensor (14) is connected with the temperature signal input terminus of controller (13), the signal output part of light intensity sensor (16) is connected with the illumination signal input part of controller (13), the control input end of water circulating pump (7) is connected with the cycle control output terminal of controller (13), the control input end of sluicing pump (9) is connected with the sluicing control output end of controller (13), and the control input end of small pump (12) is connected with the moisturizing control output end of controller (13).
4, according to claim 1 or 3 described full water freezen protection system of solar biogas generating pit in sharp frost area, it is characterized in that it also comprises water trap (3) and water collector (5), water trap (3) is arranged on the water circulation pipe at water inlet place of heating coil (4), and water collector (5) is arranged on the water circulation pipe at water outlet place of heating coil (4).
5,, it is characterized in that described water tank (10) is an attemperater according to claim 1 or 3 described full water freezen protection system of solar biogas generating pit in sharp frost area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100647957A CN101294134B (en) | 2008-06-23 | 2008-06-23 | Full water freezen protection system of solar biogas generating pit in sharp frost area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100647957A CN101294134B (en) | 2008-06-23 | 2008-06-23 | Full water freezen protection system of solar biogas generating pit in sharp frost area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101294134A true CN101294134A (en) | 2008-10-29 |
| CN101294134B CN101294134B (en) | 2011-04-06 |
Family
ID=40064673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100647957A Expired - Fee Related CN101294134B (en) | 2008-06-23 | 2008-06-23 | Full water freezen protection system of solar biogas generating pit in sharp frost area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101294134B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205358A (en) * | 2013-03-27 | 2013-07-17 | 冯忠一 | Civil biogas generator |
| CN103223273A (en) * | 2013-04-25 | 2013-07-31 | 哈尔滨工业大学 | Cold-region water purification structure solar energy combined warming water circulation system |
| CN112378090A (en) * | 2020-11-16 | 2021-02-19 | 海安长泽新能源科技有限公司 | Light-operated solar water heating device |
| CN114322334A (en) * | 2021-11-29 | 2022-04-12 | 郑州大学 | Tower type solar heat collection steam heating system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752720B1 (en) * | 2004-05-13 | 2017-07-12 | Beijing Tus-Clean Energy Technology Co., Ltd. | Glass vacuum heat pipe type solar heat collection pipe |
| CN101074788A (en) * | 2007-06-13 | 2007-11-21 | 江苏光芒厨卫太阳能科技有限公司 | Intelligent exhaust water takeout device for solar water heater |
| CN101130749B (en) * | 2007-09-26 | 2011-03-30 | 哈尔滨工业大学 | System for heat-producing sludge gas by combination of solar and electric heating tubes |
-
2008
- 2008-06-23 CN CN2008100647957A patent/CN101294134B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205358A (en) * | 2013-03-27 | 2013-07-17 | 冯忠一 | Civil biogas generator |
| CN103223273A (en) * | 2013-04-25 | 2013-07-31 | 哈尔滨工业大学 | Cold-region water purification structure solar energy combined warming water circulation system |
| CN103223273B (en) * | 2013-04-25 | 2015-04-29 | 哈尔滨工业大学 | Cold-region water purification structure solar energy combined warming water circulation system |
| CN112378090A (en) * | 2020-11-16 | 2021-02-19 | 海安长泽新能源科技有限公司 | Light-operated solar water heating device |
| CN114322334A (en) * | 2021-11-29 | 2022-04-12 | 郑州大学 | Tower type solar heat collection steam heating system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101294134B (en) | 2011-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200996728Y (en) | Solar economizing hot-water system with air-energy function | |
| CN101788161A (en) | Building heat supplying and heating system based on solar air heat collector | |
| CN101603001A (en) | A kind of constant-temperature biogas tank with sewage source heat pump | |
| CN101294134B (en) | Full water freezen protection system of solar biogas generating pit in sharp frost area | |
| CN2921026Y (en) | Solar energy methane generator | |
| CN201068451Y (en) | Solar temperature control type methane tank | |
| CN102235715A (en) | Solar water heating system with double water tanks | |
| CN201276573Y (en) | Temperature control device of marsh gas generator | |
| CN100457886C (en) | Combined temperature increasing device and method by anaerobic degesting greenhouse and solar water heater | |
| CN200975745Y (en) | Solar and complementary type bathe and heater | |
| CN101693869A (en) | Wind-solar complementary anaerobic fermentation temperature increase heat-insulation device and method thereof | |
| CN207485593U (en) | Small-sized household light-water cogeneration energy-storage system | |
| CN204897935U (en) | Temperature compensating type methane -generating pit of preventing crusting | |
| CN210683623U (en) | Plant fermentation heat supply pile heat supply system | |
| CN208475425U (en) | The heating and water system that a kind of solar energy and photovoltaic power generation combine | |
| CN202450086U (en) | Solar auxiliary methane heating system in cold regions | |
| CN208765043U (en) | The heating and refrigeration and water system that a kind of solar energy and superficial-layer geothermal energy combine | |
| CN208222626U (en) | A kind of solar heat-preservation heating system for resident's heat supply | |
| CN202350388U (en) | Composite low-grade heat source heat pump heating system used in two-stage anaerobic fermentation process | |
| CN206607135U (en) | Solar heating biogas recirculation utilizes system | |
| CN205717496U (en) | A kind of day and night temperature heating system | |
| CN205133617U (en) | Temperature compensating type methane -generating pit | |
| CN204593894U (en) | All-weather intelligent temperature difference contrast backwater energy saver | |
| CN213514057U (en) | Intelligent heating device with solar heat collector and heating furnace complementary | |
| CN209639120U (en) | A kind of countryside energy saving environmental protection heating installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20110623 |