CN101265916B - Electric fan speed governing control system and method - Google Patents
Electric fan speed governing control system and method Download PDFInfo
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- CN101265916B CN101265916B CN2008100312690A CN200810031269A CN101265916B CN 101265916 B CN101265916 B CN 101265916B CN 2008100312690 A CN2008100312690 A CN 2008100312690A CN 200810031269 A CN200810031269 A CN 200810031269A CN 101265916 B CN101265916 B CN 101265916B
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Abstract
The invention relates to a control system for automatically and manually adjusting the speed of an electric fan according to the ambient environment temperature and the maintaining temperature set by users. In an automatic speed control mode of the invention, the zero-cross detection circuit outputs a zero-cross voltage signal of the input voltage to a singlechip which outputs a control level to conduct controlled silicon after delaying a certain time by taking the signal as a reference point of time and utilizing fast switching property of the unidirectional controlled silicon. According to the result which is collected by a temperature sensor circuit by comparing the ambient environment temperature and the maintaining temperature set by users, the singlechip automatically adjusts the speed of the electric fan by changing the conduction angle of the unidirectional controlled silicon to automatically adjust the AC power output, so that the ambient temperature can be maintained at the maintaining temperature set by users. In a manual mode, the user can make a stepless speed regulation to the electric fan by using input keys and an output display circuit. The control system is stable in circuit, simple in structure and high in control precision.
Description
Technical field
The present invention relates to the control system of a kind of automatic adjusting and manual step-less adjustment electric fan rotating speed.
Existing monolithic processor controlled electric fan can step-less adjustment rotating speed and time opening, close, and its speed adjusting module is utilized analog circut to control several silicon controlled conductings and realized speed governing, and the circuit structure complexity can not realize the function of automatic speed regulation.Other electric fan generally uses the gear-type switch governor on the market, timing function utilizes mechanical type clockwork spring or potentiometer to realize, this dual mode all can cause components and parts impaired, and working life is short, manual stepless speed regulation can not be realized, user's wind speed requirement can not be satisfied.Because night, temperature change was big, the rotating speed of unmanned control electric fan, electric fan can not be regulated rotating speed automatically according to the ambient temperature value that changes.
Can not be in order to solve existing electric fan according to regulate rotating speed and the deficiency that can not realize stepless speed regulation automatically according to the temperature variation of environment, the invention provides a kind of digital control technology that can regulate the electric fan rotating speed automatically, this automatic speed regulation technology can not only be regulated the rotating speed of electric fan automatically according to the ambient temperature value that temperature transducer is passed back, make ambient temperature value maintain the maintenance temperature value that the user sets, can also realize stepless speed regulation, time opening, the function of closing according to user's button input.
The pin of single-chip microcomputer respectively with temperature sensor circuit, zero cross detection circuit, the controllable silicon load circuit, button inputting circuits, display output circuit connects.In the zero cross detection circuit, the output terminal of the transformer that links to each other with alternating voltage is connected to the input end of first rectifier bridge, the direct ground connection of this rectification bridge output end one end, the other end is by ground connection again behind two divider resistances, the tie point of described two resistance connects the base stage of triode, the emitter grounding of triode, collector electrode is connected to the 5V power supply by another resistance, and the collector electrode output of triode is connected to the external interrupt pin of single-chip microcomputer.In the controllable silicon load circuit, Ac is by being connected in series two input ends that are connected to second rectifier bridge behind the electric fan socket, and these rectifier bridge two output terminals are connected to the anode and cathode of one-way SCR, the minus earth of one-way SCR respectively.The control utmost point of one-way SCR is connected to the output terminal of a phase inverter, and the input signal of phase inverter is from the control pin of single-chip microcomputer.Described second rectifier bridge becomes the 50HZ alternating voltage pulsating dc voltage of 100HZ, single-chip microcomputer accurate delay control signal of output on its control pin triggers one-way SCR, make one-way SCR angle of flow conducting with correspondence in each cycle of pulsating dc voltage, make electric fan obtain corresponding power.
Zero cross detection circuit detects the zero passage moment of input voltage waveform, is used for synchronous input voltage waveform.When the input voltage waveform zero passage, zero cross signal of transistor collector output is given single-chip microcomputer external interrupt pin, make single-chip microcomputer enter the external interrupt program, delay time behind certain controlled angle α, a control of Single-chip Controlling pin output voltage, trigger the one-way SCR conducting,, change the output power of ac power supply by changing the conduction angle of one-way SCR.The maintenance temperature value that ambient temperature value that single-chip microcomputer is passed temperature sensor circuit back and user set compares, if the temperature value that ambient temperature value is set less than the user, synchronizing signal according to zero cross detection circuit, single-chip microcomputer will reduce the retard time of output control pulse, reduce controlled angle, increase the angle of flow of one-way SCR, increase the electric fan rotating speed thereby increase output power of power supply, otherwise then reduce output power of power supply, reduce the electric fan rotating speed.
The job step of control procedure of the present invention:
Mode of operation is selected, and automatic speed regulation or manual stepless speed regulation pattern can time openings under two kinds of patterns and close, when timing then, the Single-chip Controlling electric fan is opened or is closed;
Manually under the stepless speed regulation pattern, the user increases or reduces the silicon controlled angle of flow by button and changes the electric fan rotating speed;
Under the automatic speed regulation pattern, the user utilizes the input button and shows the maintenance temperature value that the output setting is wanted, and the ambient temperature value that single-chip microcomputer is passed this temperature value and temperature sensor circuit back is compared, and three kinds of situations are arranged:
1〉keep temperature value to equate that with ambient temperature value single-chip microcomputer does not change at the angle of flow of DC electrical source in each cycle, the electric fan rotating speed is constant;
2〉keep temperature value greater than ambient temperature value, single-chip microcomputer reduces controllable silicon at the angle of flow of DC electrical source in each cycle, and the electric fan rotating speed slows down;
3〉keep temperature value less than ambient temperature value, single-chip microcomputer increases controllable silicon at the angle of flow of DC electrical source in each cycle, and the electric fan rotating speed speeds;
The invention has the beneficial effects as follows: the fan that Connects Power, under the automatic speed regulation pattern, can regulate the rotating speed of electric fan automatically according to the variation of ambient temperature, accurately control the delay time of output control pulse with single-chip microcomputer, circuit is stable, and is simple in structure.Under manual stepless control mode, can realize the stepless regulated of rotating speed easily.And the user can set the time that electric fan is opened, closed simply and easily.
Fig. 1 is a circuit theory frame diagram of the present invention.
Fig. 2 is the circuit of the zero passage detection part in the circuit of the present invention.
Fig. 3 is the circuit of the controllable silicon loading section in the circuit of the present invention.
Fig. 4 is zero passage detection part, the wave form varies of controllable silicon loading section and the generation schematic representation of zero-crossing pulse and Single-chip Controlling pulse in the circuit of the present invention.
The present invention is further described below in conjunction with drawings and Examples.
Embodiment
In Fig. 1, zero cross detection circuit is finished the function synchronous with alternating voltage.After detecting zero cross signal, export the external interrupt pin 2 that a zero cross signal is given single-chip microcomputer 1, single-chip microcomputer 1 enters the external interrupt program.Temperature sensor circuit with ambient temperature value after pin 3 is passed to single-chip microcomputer 1, single-chip microcomputer 1 according to user maintenance temperature value of setting and the ambient temperature value of passing back relatively, when maintenance temperature value that ambient temperature is set greater than the user, single-chip microcomputer 1 will increase the silicon controlled conduction angle, in Fig. 4, increase the average power that each cycle electric fan obtains, thereby accelerate the rotating speed of electric fan, on the contrary then anti-.In one-period, the method of regulating thyristor operating angle θ size is, retard time of a triggering level of control pin 4 outputs of single-chip microcomputer realize by changing to play from the moment that single-chip microcomputer 1 receives the zero passage detection signal, retard time corresponding silicon controlled controlled angle α, in Fig. 4.Realize in the external interrupt program that accurately is controlled at single-chip microcomputer of retard time herein.After control pin 4 output triggering levels make the controllable silicon conducting, its triggering level has just disappeared, when pulsating dc voltage Zero Crossing Point that input voltage obtains after rectification, keep electric current less than silicon controlled and close automatically by the electric current of controllable silicon anode and cathode, thereby make electric fan in one-period, obtain different power and rotate, realize the automatic speed regulation of electric fan with different speed.
In zero cross detection circuit embodiment illustrated in fig. 2, the transformer 7 of 220:9 changes the 220V input voltage into the 9V alternating voltage, as waveform among Fig. 41, this 9V Ac becomes the pulsating dc voltage that frequency is 100HZ through behind the rectifier bridge 8, as waveform among Fig. 42, the output voltage of rectifier bridge 8 is delivered to triode 11 ground levels after resistance 9 and resistance 10 dividing potential drops.When transistor base voltage during greater than the conduction voltage drop of triode, triode 11 conductings, low level of its collector electrode output is given single-chip microcomputer 1 external interrupt pin 2, when transistor base voltage during less than the conduction voltage drop of triode, triode 11 ends, and its collector electrode output high level is given single-chip microcomputer external interrupt pin 2.So whenever pulsating dc voltage, as waveform among Fig. 42, during zero passage, transistor collector will be exported the external interrupt pin 2. of the zero-crossing pulse signal of a high level to single-chip microcomputer
In controllable silicon load circuit embodiment illustrated in fig. 3, rectifier bridge 14 is made into the pulsating dc voltage that frequency is 100HZ with the 220V input voltage, when the control pin 4 of single-chip microcomputer is exported a low level after certain hour postpones, high level of phase inverter 16 output terminals output makes one-way SCR 15 conducting immediately, make electric fan (being connected on the socket 13) in each cycle, evenly obtain certain power and rotate, realize speed-regulating function with certain speed.
Shown in Figure 4 be embodiment's zero passage detection part (Fig. 2), controllable silicon loading section, as the wave form varies of Fig. 3 and the generation schematic representation of zero-crossing pulse and Single-chip Controlling pulse.Waveform 1 is 9V, the 50HZ Ac that input voltage 220V, 50HZ obtain after 220:9 transformer transformation among Fig. 2, waveform 2 be among Fig. 2 waveform 1 behind rectifier bridge 8 and obtain the pulsating dc voltage of 100HZ, waveform 3 be among Fig. 2 during waveform 2 zero passages at the zero-crossing pulse synchronous of the 100HZ of triode 11 collector electrodes output with input voltage, waveform 4 is the input voltage of 220V among Fig. 3 output waveforms at controllable silicon 15 anodes behind rectifier bridge 14, and waveform 5 is trigger impulses of the 100HZ that exports behind phase inverter 16 of the voltage of single-chip microcomputer 1 control pin 4 outputs among Fig. 3.α is the controlled angle of controllable silicon time-delay among the figure, and θ is the silicon controlled angle of flow, and electric fan can not obtain power in silicon controlled controlled angle zone, when controllable silicon after the trigger pulse triggers conducting, electric fan can obtain power in silicon controlled angle of flow zone.
Claims (2)
1. the speed-adjusting and control system of an electric fan, comprise single-chip microcomputer, the controllable silicon load circuit, button inputting circuits, it is characterized in that: also comprise the temperature sensor circuit of gathering ambient temperature value and the zero cross detection circuit that detects zero cross signal, single-chip microcomputer respectively with temperature sensor circuit, zero cross detection circuit, controllable silicon load circuit, button inputting circuits, display output circuit connects, single-chip microcomputer utilizes external interrupt program accurate delay control signal of output on the control pin, and the angle of flow size of controlling one-way SCR is in real time controlled the output power of power supply; In the described zero cross detection circuit, the output terminal of the transformer that links to each other with alternating voltage is connected to the input end of first rectifier bridge, the direct ground connection of this rectification bridge output end one end, the other end is by ground connection again behind two divider resistances, the tie point of described two resistance connects the base stage of triode, the emitter grounding of triode, collector electrode is connected to the 5V power supply by another resistance, the collector electrode output of triode is connected to the external interrupt pin of single-chip microcomputer, when alternating voltage zero-crossing, zero-crossing pulse signal of transistor collector output is given the external interrupt pin of single-chip microcomputer; In the described controllable silicon load circuit, Ac is by being connected in series two input ends that are connected to second rectifier bridge behind the electric fan socket, these rectifier bridge two output terminals are connected to the anode and cathode of one-way SCR respectively, the minus earth of one-way SCR, the control utmost point of one-way SCR is connected to the output terminal of a phase inverter, the input signal of phase inverter is from the control pin of single-chip microcomputer, described second rectifier bridge becomes the 50HZ alternating voltage pulsating dc voltage of 100HZ, single-chip microcomputer accurate delay control signal of output on its control pin triggers one-way SCR, make one-way SCR angle of flow conducting with correspondence in each cycle of pulsating dc voltage, make electric fan obtain corresponding power.
2. the controlling method of the speed-adjusting and control system of an electric fan according to claim 1 is characterized in that: the user is by by increasing key and reducing the angle of flow size that key infinitely changes one-way SCR, the rotating speed of stepless change electric fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100312690A CN101265916B (en) | 2008-05-12 | 2008-05-12 | Electric fan speed governing control system and method |
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| CN2008100312690A CN101265916B (en) | 2008-05-12 | 2008-05-12 | Electric fan speed governing control system and method |
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| CN101265916A CN101265916A (en) | 2008-09-17 |
| CN101265916B true CN101265916B (en) | 2011-08-31 |
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| CN2008100312690A Expired - Fee Related CN101265916B (en) | 2008-05-12 | 2008-05-12 | Electric fan speed governing control system and method |
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| CN101418807B (en) * | 2008-12-03 | 2012-08-22 | 朱鸽 | Governor for AC blower fan |
| CN101770244B (en) * | 2009-11-30 | 2012-01-18 | 东北大学 | Measuring and sampling method for collecting temperature of multifunctional heat simulating tester in power-down state |
| JP5780120B2 (en) * | 2011-11-02 | 2015-09-16 | ブラザー工業株式会社 | Power supply system, image forming apparatus equipped with the power supply system, and small-capacity power supply circuit |
| CN103186150A (en) * | 2011-12-30 | 2013-07-03 | 北大方正集团有限公司 | Alternating current heater control device and method |
| CN102852844B (en) * | 2012-09-03 | 2015-04-15 | 格力电器（中山）小家电制造有限公司 | Electric fan |
| CN103148009A (en) * | 2013-03-28 | 2013-06-12 | 梁翠 | Automatic control system of fan |
| CN104252404A (en) * | 2013-06-26 | 2014-12-31 | 鸿富锦精密工业（深圳）有限公司 | Server and manufacturing method of fan meter thereof |
| CN103644128A (en) * | 2013-11-26 | 2014-03-19 | 河南省佰腾电子科技有限公司 | Intelligent temperature control electric fan |
| CN103914967B (en) * | 2014-01-25 | 2017-01-04 | 温州众合拉链有限公司 | Intelligent socket, intelligent socket control system and method |
| CN104102159B (en) * | 2014-07-22 | 2017-08-01 | 中国兵器工业集团第二一四研究所苏州研发中心 | It is a kind of that there is the controllable silicon delay trigger circuit for binding function |
| CN104333364B (en) * | 2014-11-04 | 2017-09-26 | 许蓬 | A kind of fault detection method of ac solid relay and the relay load circuit |
| CN105240296B (en) * | 2015-11-03 | 2017-07-04 | 梁文广 | For industry and the speed adjustable fan of business |
| CN105955369B (en) * | 2016-06-20 | 2022-07-01 | 黑龙江六德农康农业科技有限公司 | Agricultural greenhouse climate control system |
| CN106209031A (en) * | 2016-07-18 | 2016-12-07 | 珠海格力电器股份有限公司 | Clock circuit, clock signal generate method and include the control chip of this clock circuit |
| CN108457885A (en) * | 2017-11-20 | 2018-08-28 | 聂兵 | A kind of AC blower fan speed-regulating control device |
| CN109200374A (en) * | 2018-08-02 | 2019-01-15 | 常州市第二人民医院 | A kind of orthopaedic trauma Wound irrigation device |
| CN109595185A (en) * | 2018-12-03 | 2019-04-09 | 湖北工业大学 | A kind of novel household cooling device of the man-machine interconnection of intelligence |
| CN110930836A (en) * | 2019-11-18 | 2020-03-27 | 湖北工程学院 | Power electronic technology teaching experimental instrument |
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