CN1117951C - Intelligent power saving system for central air conditioner - Google Patents
Intelligent power saving system for central air conditioner Download PDFInfo
- Publication number
- CN1117951C CN1117951C CN 01107645 CN01107645A CN1117951C CN 1117951 C CN1117951 C CN 1117951C CN 01107645 CN01107645 CN 01107645 CN 01107645 A CN01107645 A CN 01107645A CN 1117951 C CN1117951 C CN 1117951C
- Authority
- CN
- China
- Prior art keywords
- frequency
- main frame
- central air
- programmable logic
- logic controller
- 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
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to an intelligent energy-saving system of a central air conditioner, which uses a programmable controller having programmable performance as a core. Sensors are used for detecting the variation of water temperature and air humidity in a central air conditioning system, and a central air conditioning expert experience knowledge base and a control program stored in the programmable controller are used for regulating a freezing water quantity, a cooling water quantity and the rotation speed of a cooling tower blower in a stepless mode by analyzing, judging and processing environmental parameters and system states, so that the central air conditioning system operates under the state of high efficiency so as to realize the maximal energy saving.
Description
The present invention relates to a kind of central air-conditioning energy control system.
Central air-conditioning energy-saving system has big quantity research, application, but all be in modification at present to the hardware controls circuit, even application frequency converter, also only be that control is opened, stopped to realized blower fan, water pump soft, do not realize system-wide overall co-ordination operation and step-less adjustment, CN2331900Y is disclosed to be exactly this device.
The purpose of this invention is to provide and a kind ofly can make water pump, blower fan, freezing unit in the central air conditioner system be in the best of breed running status, with the intelligence system that realizes that whole central air conditioner system is energy-conservation to greatest extent.
Technical scheme that the present invention adopts: comprise each relevant device of central air conditioner system: compression host groups (8), refrigerating water pump group (71), coolant pump group (72), cooling tower group (73) is characterized in that also comprising:
(1), a Programmable Logic Controller (1);
(2), the input equipment (11) of testing environment parameter, this input equipment is communicated with Programmable Logic Controller (1) by analog quantity input module (2);
(3), the input equipment (12) of sensed system parameter, this input equipment is communicated with Programmable Logic Controller (1) by analog quantity input module (3);
(4), control the frequency converter (51,52,53) of the motor unit rotating speed of refrigerating water pump group, coolant pump group and cooling tower group (71,72,73) respectively, the input of said each frequency converter is communicated with Programmable Logic Controller (1) by analog output module (10), and the output of each frequency converter is connected to refrigerating water pump group, coolant pump group and the cooling tower group of being controlled by each corresponding switching device shifter (61,62,63);
The control end of said switching device shifter (61,62,63) is communicated with Programmable Logic Controller (1) by switching value output module (13);
Said Programmable Logic Controller (1) also is communicated with to detect the working state of system of each relevant device by the switching value output contact of switching input module (4) with compression main frame (8), refrigerating water pump group (71), coolant pump group (72), cooling tower group (73);
The input of said compression main frame (8) is communicated with Programmable Logic Controller (1) by switching value output module (9);
Said Programmable Logic Controller (1) storage inside has the expertise knowledge base and the control program of central air conditioner system operation, and this control program is carried out following steps:
(I), initialization system, gather ambient parameter and systematic parameter in real time;
(II), ON/OFF main frame:
A, drive main frame, then carry out and open the compressor subprogram as needs;
B, close main frame, then carry out and close the compressor subprogram as needs;
(III), then carry out and calculate freezing, cooling frequency converter output frequency if do not need out main frame or pass main frame
The subprogram of rate, the calculating of frequency converter output frequency adopt fuzzy reasoning based on expertise,
Calculating process;
(IV), carry out freezing, the coolant pump subprogram of ON/OFF:, then add when frequency converter frequency surpasses set upper limit
Drive a pump, if pump standard-sized sheet, then alarm; When being lower than regulation, frequency converter frequency prescribes a time limit down,
Then process pump platform number more than one or do not have the operation main frame condition under close a pump, otherwise
Return main program; When frequency converter frequency is between regulation bound frequency, output frequency
And return main program.
The present invention is a core with the Programmable Logic Controller with programmable features, pick up the water temperature surveyed in the central air conditioner system and the variation of aerial temperature and humidity by each sensor, by the central air-conditioning expertise knowledge base and the control program that leave in the Programmable Logic Controller, ambient parameter and system mode are analyzed, judge, handle, to the freezing water yield, the rotating speed of cooling water inflow and blower fan of cooling tower carries out step-less adjustment, make the whole system co-ordination, automatically the variation of adaptive system refrigeration duty effectively, make the cold coal that air-conditioning system provides and the refrigeration duty of building reach dynamic, real-time balance, system is moved under the high efficiency state, realize energy-conservation to greatest extent.
Fig. 1 is a main hardware connection diagram of the present invention;
Fig. 2 is a primary control program flow chart of the present invention;
Fig. 3 opens the compressor subroutine flow chart for the present invention;
Fig. 4 closes the compressor subroutine flow chart for the present invention;
Fig. 5 calculates the frequency converter frequency subroutine flow chart for the present invention;
Fig. 6 is an ON/OFF pump subroutine flow chart of the present invention.
Below in conjunction with accompanying drawing embodiments of the present invention are described in further detail:
The present invention conceives with the control able to programme of central air conditioning system, by computer programming, realizes Intelligent Control Strategy and algorithm.
According to the function and the requirements of saving energy of the present invention of central air conditioner system, present embodiment will be finished following task:
1), determines compressor start platform number according to ambient temperature and humidity and freezingly go out return water temperature;
2) according to freezing Inlet and outlet water temperature decision chilled-water flow, determine refrigerating water pump start platform number and converting operation
The running frequency of refrigerating water pump;
3) according to cooling Inlet and outlet water temperature, decision cooling water flow, and then definite coolant pump, cooling tower start
Platform number and cooling frequency converter output frequency.
Above-mentioned three tasks are to be mutually related.For example: the precondition of driving compressor has a refrigerating water pump at least exactly in operation, and the service condition of compressor, refrigerating water pump to be coolant pump have one at least in operation, correspondingly, cooling tower also will move etc.
The main circuit structured flowchart of present embodiment as shown in Figure 1.Among the figure: Programmable Logic Controller 1 detects indoor temperature, humidity for the nucleus equipment of native system realization Based Intelligent Control, and the input equipment 11 of ambient parameters such as outdoor temperature, humidity is communicated with Programmable Logic Controller 1 by analog quantity input module 2; Detect freezingly to go out, the backwater water temperature, cool off, the backwater water temperature, the input equipment 12 of systematic parameters such as freezing water outlet hydraulic pressure is communicated with Programmable Logic Controller 1 by analog quantity input module 3; Detect compression main frame, refrigerating water pump, coolant pump, cooling tower starting and stopping state, system modes such as frequency conversion state are communicated with Programmable Logic Controller 1 by switching input module 4; The frequency converter 51,52,53 of controlling refrigerating water pump, coolant pump and cooling tower respectively is communicated with Programmable Logic Controller 1 by analog output module 10; Switching device shifter 61,62,63 is communicated with Programmable Logic Controller 1 by switching value output module 13, is used to realize the function of one group of motor unit of a Frequency Converter Control, and 71,72,73 are respectively the motor unit of refrigerating water pump group, coolant pump group, cooling tower group.Compression host groups 8 is communicated with the control of realization switch via switching value output module 9 with Programmable Logic Controller 1.
Fig. 2 is the primary control program flow chart of present embodiment, in order to realize algorithm control strategy of the present invention.This control strategy can be under unmanned situation of intervening, and by gathering ambient parameter and system running state, utilization realizes the optimum operation of central air conditioner system automatically based on the Fuzzy Inference of expertise knowledge.Specifically describe as follows: after the start-up system, whole system is carried out initialization (for example step 100), begin to gather environment and system mode and parameter then,, judge whether to open main frame or close main frame according to the parameter of gathering.If need open or close main frame, then carry out and increase/close a main frame subprogram (for example step 104), return main program then; If need not open or close main frame, then to carry out and calculate freezing, cooling frequency conversion rate subprogram (for example step 105), fuzzy reasoning method is adopted in the calculating of frequency converter output frequency.When the frequency of input during greater than upper frequency limit or less than the lower bound frequency, just need increase or reduce a pump, enter that ON/OFF is freezing, coolant pump subprogram (for example step 106).If need open or close pump, carry out then that switch is freezing, the coolant pump subprogram, otherwise return main program.
Based on above-mentioned control strategy, control algolithm and three basic tasks, its subprogram can adopt following method to realize:
After setting up procedure 100, step 101 is with the whole system initialization, 1. initialization comprises will compress main frame, chilled water pump, cooling water pump, and the cooling tower queuing is to realize start in turn, prolong machine service life, the present invention takes to open earlier closes strategy earlier, 2. starts a coolant pump converting operation at 40Hz, and a refrigerating water pump converting operation is at 40Hz, whole system water is flowed, evenly water temperature in the pipe.3. delayed time preparation for acquiring environment and systematic parameter 10 minutes.4. so far initialization finishes.
The detailed process of step 104 is as figure (3), (4).Figure (3) is described below for opening the flow chart of main frame: if 201 main frames standard-sized sheet still need drive main frame, show that building loading is excessive, system overload, then alarming 202, one potential problems is to have a compression main frame to damage; Otherwise judge that to 203 whether last main frame puts the time into operation above 20 minutes, reduce system's overshoot,, show that then the building refrigeration duty is very big, operating procedure 204 if surpass the scheduled time.Figure (4) is the flow chart that closes main frame, is described below: the order of shutdown is in the compression main frame of operation, closes that main frame of operation the earliest earlier, closes that the longest main frame of running time in other words earlier, and its operating process is just in time opposite with start.
The content of step 105 is very abundant, is important component part of the present invention.With the seeing of mobile maximal efficiency of cold coal by chilled water is one of energy-conservation key issue, according to theoretical direction, and square being directly proportional of power and electric machine frequency, if promptly drop to 40Hz by power frequency, then power of motor will descend 36%.The present invention uses expertise and fuzzy control method, and the output frequency of stepless regulator joint frequency converter makes to reach cold coal and the balance of building refrigeration duty, thereby realizes energy-conservation to greatest extent with the power output of control water pump.
The detailed diagram of step 105 is shown in figure (5).
Step 401 is the fuzzification processes that realize real time data, because the expertise rule is blured on describing, be not a very clear and definite result, for example regular " if current freezing return water temperature is higher; and; last time, freezing return water temperature was very high, then suitably reduced the frequency converter output frequency ".Wherein, " higher ", " very high ", " suitably " is fuzzy language, in order to use this class human expert's Heuristics, used real time data must be carried out obfuscation, and the real time data among the present invention is freezing into and out of water temperature, cooling turnover water temperature.Because freeze cycle almost is identical process with cool cycles, so be that example describes with freezing.
Fuzzy method in the step 401 adopts ripe, simple triangular form fuzzy method, the fuzzy reasoning of step 402 adopts the stronger gravity model appoach of filter capacity, step 403 is according to the central air-conditioning domain experts' experience, that the consulting and the statistics of field data and summing up draws, be expressed in computer-internal one group can be used for fuzzy reasoning and change rule.
The fuzzy conclusion that step 404 is released according to step 402, adopt excellent type reverse gelatinizing method, draw the frequency of the current refrigerating water pump of final needs, export to freezing frequency converter by the analog quantity output equipment, the output of freezing frequency converter just, thereby the rotating speed of control refrigerating water pump, thereby the flow of control chilled water.
In the step 105 about the frequency output control of cooling frequency converter and freezing frequency converter roughly the same.
When the frequency of reasoning output during, just need increase or reduce a pump, thereby enter step 106 greater than upper frequency limit (the present invention is a power frequency) or less than lower bound frequency (the present invention is made as 30Hz).
The description of step 106 is that example is described with the refrigerating water pump group still, as shown in Figure 6.
Prescribe a time limit above the upper limit or under being lower than when the output frequency of the freezing frequency converter that step 105 calculates, enter step 500, if the freezing frequency converter frequency overfrequency upper limit, then should increase a refrigerating water pump 508, if refrigerating water pump standard-sized sheet also will be increased, then report to the police 509, illustrative system has fault.One of condition of increasing a refrigerating water pump is to start that stop at first to move at 40Hz in turn and with frequency conversion realizing, or the longest one of dwell time, prolongs equipment life to reach.
Otherwise, when the frequency that calculates is lower than lower limit 502, then to stop a refrigerating water pump 505, when stopping logic and can simple process closing for the refrigerating water pump that will open the earliest, must judge at first whether compressor moves 504, according to process conditions, if compression main frame in running order 504 is arranged, then to guarantee a refrigerating water pump at least in operation 503, otherwise will have an accident.Therefore, at the compression main frame, refrigerating water pump is on the interlock connection between the cooling tower, must therefrom obtain logical relation with reference to the detailed description of central air conditioner system, this also can be used as rule and puts into rule base, but this rule is distinct, and is enforceable, must unconditional conformance.
Step 107 is a step simple switching value output control.
In a word, illustrated and what show is that a Programmable Logic Controller is a core, cooperate corresponding outer figure circuit and equipment, this system is applicable to that the energy-saving run of central air conditioner system controls.According to expertise of the present invention and fuzzy reasoning, realize the optimum operation of central air conditioner system, preferred example of the present invention is illustrated.Various variations or the remodeling made by those of ordinary skill in the art can not depart from the scope of the present invention.
Claims (3)
1. central air-conditioning intelligent energy-saving control system comprises each relevant device of central air conditioner system: compression host groups (8), refrigerating water pump group (71), coolant pump group (72), cooling tower group (73) is characterized in that also comprising:
(1), a Programmable Logic Controller (1);
(2), the input equipment (11) of testing environment parameter, this input equipment is communicated with Programmable Logic Controller (1) by analog quantity input module (2);
(3), the input equipment (12) of sensed system parameter, this input equipment is communicated with Programmable Logic Controller (1) by analog quantity input module (3);
(4), control the frequency converter (51,52,53) of the motor unit rotating speed of refrigerating water pump group, coolant pump group and cooling tower group (71,72,73) respectively, the input of said each frequency converter is communicated with Programmable Logic Controller (1) by analog output module (10), and the output of each frequency converter is connected to refrigerating water pump group, coolant pump group and the cooling tower group of being controlled by each corresponding switching device shifter (61,62,63);
The control end of said switching device shifter (61,62,63) is communicated with Programmable Logic Controller (1) by switching value output module (13);
Said Programmable Logic Controller (1) also is communicated with to detect the working state of system of each relevant device by the switching value output contact of switching input module (4) with compression main frame (8), refrigerating water pump group (71), coolant pump group (72), cooling tower group (73);
The input of said compression main frame (8) is communicated with Programmable Logic Controller (1) by switching value output module (9);
Said Programmable Logic Controller (1) storage inside has the expertise knowledge base and the control program of central air conditioner system operation, and this control program is carried out following steps:
(I), initialization system, gather ambient parameter and systematic parameter in real time;
(II), ON/OFF main frame:
A, drive main frame, then carry out and open the compressor subprogram as needs;
B, close main frame, then carry out and close the compressor subprogram as needs;
(III) if do not need out main frame or close main frame, then to carry out and calculate subprogram freezing, cooling frequency converter output frequency, fuzzy reasoning, the calculating process based on expertise adopted in the calculating of frequency converter output frequency;
(IV), carry out freezing, the coolant pump subprogram of ON/OFF: when frequency converter frequency surpasses set upper limit, then increase a pump, if pump standard-sized sheet, then alarm; When frequency converter frequency is lower than regulation down in limited time, then at process pump platform number more than one or do not have under the condition of operation main frame and close a pump, otherwise return main program; When frequency converter frequency was between regulation bound frequency, output frequency also returned main program.
2. central air-conditioning intelligent energy-saving control system according to claim 1 is characterized in that said Programmable Logic Controller (1) comprises a microprocessor and E
2Prom memory, this microprocessor and E
2PROM is storing the expertise knowledge base and the control program of said central air conditioner system operation, this control strategy can be under unmanned situation of intervening, by gathering ambient parameter and system running state, utilization is based on the Fuzzy Inference of expertise knowledge, automatically realize the optimum operation of central air conditioner system, specifically describe as follows: after the start-up system, whole system is carried out initialization, begin to gather environment and system mode and parameter then, according to the parameter of gathering, judge whether to open main frame or close main frame; If need open or close main frame, then carry out and increase/close a main frame subprogram, return main program then; If need not open or close main frame, then to carry out and calculate freezing, cooling frequency conversion rate subprogram, fuzzy reasoning method is adopted in the calculating of frequency converter output frequency; When the frequency of input during greater than upper frequency limit or less than the lower bound frequency, just need increase or reduce a pump, enter that ON/OFF is freezing, the coolant pump subprogram; If need open or close pump, carry out then that switch is freezing, the coolant pump subprogram, otherwise return main program.
3. central air-conditioning intelligent energy-saving control system according to claim 1, the expertise knowledge base that it is characterized in that said central air conditioner system operation are the one group of rule that can be used for the fuzzy reasoning replacing that is expressed in computer-internal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107645 CN1117951C (en) | 2001-03-20 | 2001-03-20 | Intelligent power saving system for central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107645 CN1117951C (en) | 2001-03-20 | 2001-03-20 | Intelligent power saving system for central air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1375665A CN1375665A (en) | 2002-10-23 |
| CN1117951C true CN1117951C (en) | 2003-08-13 |
Family
ID=4656560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01107645 Expired - Fee Related CN1117951C (en) | 2001-03-20 | 2001-03-20 | Intelligent power saving system for central air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1117951C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080863A (en) * | 2010-12-08 | 2011-06-01 | 海尔集团公司 | Control method and device of central air conditioner |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549895C (en) * | 2003-11-18 | 2009-10-14 | 乐普四方（北京）节能技术有限公司 | Intelligent energy-saving device |
| CN1297786C (en) * | 2004-07-20 | 2007-01-31 | 贵州华城楼宇科技有限公司 | Cold / worming water energy-saving apparatus of central air conditioner |
| CN1297785C (en) * | 2004-07-20 | 2007-01-31 | 贵州华城楼宇科技有限公司 | Distribution type high efficient energy device of central air conditioner |
| CN1300515C (en) * | 2004-12-07 | 2007-02-14 | 宁波华普工业控制技术有限公司 | Central air conditioning variable frequency energy saving control method |
| JP3864980B2 (en) * | 2005-04-18 | 2007-01-10 | ダイキン工業株式会社 | Air conditioner |
| US8096139B2 (en) | 2005-10-17 | 2012-01-17 | Carrier Corporation | Refrigerant system with variable speed drive |
| KR20100121961A (en) * | 2009-05-11 | 2010-11-19 | 엘지전자 주식회사 | Air conditioner |
| CN101660815B (en) * | 2009-09-16 | 2011-11-23 | 谭仲禧 | Air-conditioning system and control method thereof |
| CN101832622B (en) * | 2010-05-25 | 2011-12-07 | 西安工程大学 | Method for realizing continuous regulation of primary pump variable flow system by using evaporative water cooling machine set |
| CN102062459A (en) * | 2010-12-24 | 2011-05-18 | 东莞市虹德电子有限公司 | Energy-saving control system of central air conditioner |
| CN102692052A (en) * | 2011-03-21 | 2012-09-26 | 广州科力新能源有限公司 | Cold and hot water type precise air conditioning system |
| CN103148559B (en) * | 2011-12-07 | 2015-08-26 | 珠海格力电器股份有限公司 | Control method and device of air conditioner and air conditioner |
| CN102645006A (en) * | 2012-05-07 | 2012-08-22 | 深圳市捷华深环保节能科技有限公司 | Energy-saving remote control system for central air conditioner and use method thereof |
| CN102692066B (en) * | 2012-06-14 | 2014-11-26 | 四川长虹空调有限公司 | Fault diagnosis control system for variable-frequency air conditioner and control method of fault diagnosis control system |
| CN104390316B (en) * | 2014-12-25 | 2017-05-17 | 李钢 | Distributed freeze pump controller for concentrated air conditioning |
| CN107741080A (en) * | 2017-10-12 | 2018-02-27 | 广东美的暖通设备有限公司 | Central air-conditioning starting-up method, device and central air-conditioning |
| CN108709283B (en) * | 2018-05-29 | 2020-11-17 | 浙江盾安自控科技有限公司 | System adjusting method and air conditioning system using same |
| CN109237864A (en) * | 2018-09-25 | 2019-01-18 | 顿汉布什(中国)工业有限公司 | A kind of fuzzy control method for refrigeration station group control system |
| CN110736243A (en) * | 2019-10-29 | 2020-01-31 | 珠海格力电器股份有限公司 | Control method and device for air conditioner and temperature regulator |
| CN111207487A (en) * | 2020-01-09 | 2020-05-29 | 青岛捷能易道能效科技有限公司 | Cold station energy efficiency control system |
| CN114608182B (en) * | 2020-12-03 | 2023-09-15 | 福建佰时德能源科技有限公司 | Cooling tower control method and control system |
-
2001
- 2001-03-20 CN CN 01107645 patent/CN1117951C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080863A (en) * | 2010-12-08 | 2011-06-01 | 海尔集团公司 | Control method and device of central air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1375665A (en) | 2002-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1117951C (en) | Intelligent power saving system for central air conditioner | |
| CN101498494A (en) | Economical operation method for central air conditioning system | |
| CN201003835Y (en) | Energy saving controller for central air conditioner | |
| CN2703223Y (en) | Central air conditioner energy-saving controlling device | |
| CN1904503A (en) | Compressor variable frequency energy saving reforming method of constant speed centrifugal water cooling machine set | |
| CN1598428A (en) | Method for self-adaptive optimizing controlling cold water system of central air conditioner and its apparatus | |
| CN102022799B (en) | Energy-saving control method for central air conditioner system | |
| CN113864973B (en) | Control method, device and system for clustered heat pump unit and air conditioning equipment | |
| CN1715811A (en) | Air-conditioning | |
| CN109765951B (en) | Electrical cabinet temperature and humidity regulation method, system and medium based on heterogeneous data analysis | |
| CN113446705A (en) | Energy-saving control system and control method for subway efficient machine room | |
| CN114396714A (en) | System and method for automatically controlling and operating system starting number | |
| CN101029762A (en) | Self-adaptive thermostatic-controlled economical monitor of special air conditioner for programm exchanger | |
| CN211903215U (en) | Energy-saving control system for subway efficient machine room | |
| CN100339666C (en) | Variable loaded heat pump system in multi machines | |
| CN100445654C (en) | Air-conditioning cold flow self-adaptive energy-saving control system | |
| CN1297787C (en) | Chilled water energy-saving apparatus of cental air conditioner | |
| CN114087825A (en) | Energy-saving control method for refrigerator | |
| CN210951740U (en) | Efficient energy-saving power station water chilling unit load and unload control system | |
| CN105674517B (en) | A kind of precision air conditioner energy saver and energy-saving control method for computer room | |
| CN104677047A (en) | Electric throttle control method for refrigerator | |
| CN2824105Y (en) | Intelligent controller for cooling drier | |
| CN110230867B (en) | Operation control method and device of air conditioner | |
| CN1431434A (en) | One air conditioner for coolin three places and variable frequency control method | |
| CN115564333A (en) | Monitoring management system based on building equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20030813 Termination date: 20110320 |