CN202483920U - Alternating-current fan speed regulation circuit - Google Patents
Alternating-current fan speed regulation circuit Download PDFInfo
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- CN202483920U CN202483920U CN201220113898XU CN201220113898U CN202483920U CN 202483920 U CN202483920 U CN 202483920U CN 201220113898X U CN201220113898X U CN 201220113898XU CN 201220113898 U CN201220113898 U CN 201220113898U CN 202483920 U CN202483920 U CN 202483920U
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Abstract
The utility model relates to the field of power supply circuits, in particular to an alternating-current fan speed regulation circuit. A circuit of the alternating-current fan speed regulation circuit comprises a temperature detecting device, a voltage division circuit, and a capacity voltage-reduction speed regulation control circuit which comprises a plurality of speed regulation branch circuits using capacity to reduce voltage. All speed regulation branch circuits are respectively started by different input voltages and respectively output different voltages. Output ends of all speed regulation branch circuits of the capacity voltage-reduction speed regulation control circuit are connected with an alternating-current fan. Temperature of a heat dissipation device is detected through the temperature detecting device. Corresponding voltages are output through the voltage division circuits to achieve break-over of one branch circuit of the capacity voltage-reduction speed regulation control circuit. Voltages after being reduced through different capacities of the branch circuits are output to the alternating-current fan to achieve speed regulation. The circuit is simple, lowers cost, is downsized, reduces noise, and improves use efficiency of electricity sources on the premise that the speed regulation of the alternating-current fan is achieved.
Description
Technical field
The utility model relates to the power circuit application, relates in particular to a kind of ac fan alignment circuit.
Background technique
Fan is a kind of electrical equipment that is used to dispel the heat, and the faster radiating effect of the rotating speed of fan is good more, but the noise that produces is big more.
In the existing technology, ac fan does not generally have speed governing or realizes fan speed-regulating with many tap transformers.If not speed governing is still full-speed operation under the lower situation of temperature, influence fan life like this, cause the electric power resource waste and produce unnecessary noise; The ac fan that has uses many tap transformers to come speed governing, and cost is higher relatively, and it is bigger to take volume.
Summary of the invention
The purpose of the utility model is to avoid deficiency of the prior art and a kind of ac fan alignment circuit is provided; This circuit is simple, under the prerequisite that realizes the ac fan variable-speed, reduces cost, reduced volume, minimizing noise, improves the utilization efficiency of electric power resource.
The purpose of the utility model realizes through following technological scheme.
A kind of ac fan alignment circuit; Comprise Temperature Detector and bleeder circuit; Temperature Detector is connected with bleeder circuit; It is characterized in that: also comprise the capacitance decompression speed-regulating control circuit; The capacitance decompression speed-regulating control circuit comprises a plurality of speed regulating control branch roads that use capacitance decompression, and each speed regulating control branch road all has the comparative voltage input end, and each speed regulating control branch road is started by different input voltages respectively and exports different voltages with different respectively; The voltage output end that bleeder circuit has a plurality of different voltages respectively with the corresponding connection of comparative voltage input end of each speed regulating control branch road, the output terminal of each speed regulating control branch road of capacitance decompression speed-regulating control circuit is connected with ac fan.
Preferably; The capacitance decompression speed-regulating control circuit comprises first grade of speed regulating control branch road, second grade of speed regulating control branch road and third gear speed regulating control branch road; Wherein second grade of speed regulating control branch road has two comparative voltage input ends; Bleeder circuit has four voltage output ends; The comparative voltage input end of first grade of speed regulating control branch road is connected with first voltage output end of bleeder circuit; First comparative voltage input end of second grade of speed regulating control branch road is connected with second voltage output end of bleeder circuit, and second comparative voltage input end of second grade of speed regulating control branch road is connected with the 3rd voltage output end of bleeder circuit, and the comparative voltage input end of third gear speed regulating control branch road is connected with the 4th voltage output end of bleeder circuit; The direct current of capacitance decompression speed-regulating control circuit supplies the power taking end to be connected with DC electrical source VDD, and the interchange power taking end of capacitance decompression speed-regulating control circuit is electrically connected with the city.
Another is preferred, and Temperature Detector is set to the thermistor RT of negative temperature coefficient.
Preferred; Bleeder circuit comprises resistance R 1, resistance R 2, resistance R 3 and resistance R 4, and resistance R 1 one ends are connected with thermistor RT, and thermistor RT is connected with DC electrical source VDD; Resistance R 1 the other end resistance R 2 one ends connect; Resistance R 2 the other ends are connected with resistance R 3 one ends, and resistance R 3 the other ends are connected with resistance R 4 one ends, and resistance R 4 the other ends are connected with power supply ground.
Further, first grade of speed regulating control branch road comprises the 4th comparing unit U3D, resistance R 5, resistance R 6, resistance R 7, resistance R 16, resistance R 20, diode D1, diode D2, diode D8, triode Q1, capacitor C 1 and relay R Y1;
3 pin, the diode D2 negative pole of 3 pin of resistance R 5 one ends, the 4th comparing unit U3D, resistance R 7 one ends, relay R Y1 are connected with DC electrical source VDD; 1 pin of relay R Y1 is electrically connected with the city; 10 pin of the 4th comparing unit U3D are connected with resistance R 4 one ends; Resistance R 5 the other ends are connected with 11 pin, resistance R 16 1 ends of resistance R 6 one ends, the 4th comparing unit U3D; Resistance R 16 the other ends are connected with diode D1 negative pole, and diode D1 is anodal to be connected with 13 pin, resistance R 7 the other ends, the diode D8 positive pole of the 4th comparing unit U3D, and diode D8 negative pole is connected with triode Q1 base stage; Triode Q1 collector electrode is anodal with diode D2,4 pin of relay R Y1 are connected; 2 pin of relay R Y1 are connected with capacitor C 1 one ends, resistance R 20 1 ends, and capacitor C 1 the other end, resistance R 20 the other ends are connected with ac fan, and resistance R 6 the other ends, triode Q1 emitter are connected with power supply ground.
Further, second grade of speed regulating control branch road comprises the second comparing unit U3B, the 3rd comparing unit U3C, resistance R 8, resistance R 9, resistance R 19, resistance R 10, resistance R 11, resistance R 12, resistance R 18, resistance R 21, diode D3, diode D4, diode D5, diode D10, diode D11, diode D12, triode Q2, capacitor C 2 and relay R Y2;
3 pin, the diode D3 negative pole of resistance R 8 one ends, resistance R 10 1 ends, resistance R 12 1 ends, relay R Y2 are connected with DC electrical source VDD; 1 pin of relay R Y2 is electrically connected with the city; 6 pin of the second comparing unit U3B are connected with resistance R 2 one ends; 9 pin of the 3rd comparing unit U3C are connected with resistance R 1 one ends, and resistance R 10 the other ends are connected with 7 pin, resistance R 18 1 ends of resistance R 11 1 ends, the second comparing unit U3B, and resistance R 18 the other ends are connected with diode D4 negative pole; Diode D4 is anodal to be connected with diode D11 positive pole, diode D12 positive pole, diode D5 positive pole, resistance R 12 the other ends, diode D10 positive pole; Diode D11 negative pole is connected with 1 pin of the second comparing unit U3B, and diode D10 negative pole is connected with triode Q2 base stage, and triode Q2 collector electrode is anodal with diode D3,4 pin of relay R Y2 are connected; 2 pin of relay R Y2 are connected with capacitor C 2 one ends, resistance R 21 1 ends, and capacitor C 2 the other ends, resistance R 21 the other ends are connected with ac fan;
Resistance R 8 the other ends are connected with 8 pin, resistance R 19 1 ends of resistance R 9 one ends, the 3rd comparing unit U3C; Resistance R 19 the other ends are connected with diode D5 negative pole; Diode D12 negative pole is connected with 14 pin of the 3rd comparing unit U3C, and resistance R 11 the other ends, triode Q2 emitter, resistance R 9 the other ends are connected with power supply ground.
Another further, third gear speed regulating control branch road comprises the first comparing unit U3A, resistance R 13, resistance R 14, resistance R 15, resistance R 17, resistance R 22, diode D7, diode D6, diode D9, triode Q3, capacitor C 3 and relay R Y3;
3 pin, the diode D6 negative pole of resistance R 13 1 ends, resistance R 15 1 ends, relay R Y3 are connected with DC electrical source VDD; 1 pin of relay R Y3 is electrically connected with the city; 4 pin of the first comparing unit U3A are connected with resistance R 3 one ends; Resistance R 13 the other ends are connected with 5 pin, resistance R 17 1 ends of resistance R 14 1 ends, the first comparing unit U3A; Resistance R 17 the other ends are connected with diode D7 negative pole, and diode D7 is anodal to be connected with 2 pin, resistance R 15 the other ends, the diode D9 positive pole of the first comparing unit U3A, and diode D9 negative pole is connected with triode Q3 base stage; Triode Q3 collector electrode is anodal with diode D6,4 pin of relay R Y3 are connected; 2 pin of relay R Y3 are connected with capacitor C 3 one ends, resistance R 22 1 ends, and capacitor C 3 the other ends, resistance R 22 the other ends are connected with ac fan, and resistance R 14 the other ends, triode Q3 emitter are connected with power supply ground.
Further, DC electrical source VDD is 12 volts.
The utility model beneficial effect following:
A kind of ac fan alignment circuit; Comprise Temperature Detector and bleeder circuit; Temperature Detector is connected with bleeder circuit, also comprises the capacitance decompression speed-regulating control circuit, and the capacitance decompression speed-regulating control circuit comprises a plurality of speed regulating control branch roads that use capacitance decompression; Each speed regulating control branch road all has the comparative voltage input end; Each speed regulating control branch road is started by different input voltages respectively and exports different voltages with different respectively, the voltage output end that bleeder circuit has a plurality of different voltages respectively with the corresponding connection of comparative voltage input end of each speed regulating control branch road, the output terminal of each speed regulating control branch road of capacitance decompression speed-regulating control circuit is connected with ac fan; Detect radiator temperature through Temperature Detector; Through bleeder circuit output correspondent voltage, be used for one of them branch road of conducting capacitance decompression speed-regulating control circuit, realize speed governing through behind the different capacitance decompressions of each branch road this voltage being exported to ac fan; This circuit is simple, under the prerequisite that realizes the ac fan variable-speed, reduces cost, reduced volume, minimizing noise, improves the utilization efficiency of electric power resource.
Description of drawings
Utilize accompanying drawing that the utility model is further specified, but the content in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Fig. 3 is the circuit diagram of first grade of speed regulating control branch road of the utility model.
Fig. 4 is the circuit diagram of second grade of speed regulating control branch road of the utility model.
Fig. 5 is the circuit diagram of the third gear speed regulating control branch road of the utility model.
In Fig. 1 to Fig. 5, include:
Capacitance decompression speed-regulating control circuit 3,
First grade of speed regulating control branch road 31,
Second grade of speed regulating control branch road 32,
Third gear speed regulating control branch road 33.
Embodiment
In conjunction with following examples the utility model is described further.
A kind of ac fan alignment circuit; As shown in Figure 1; Comprise Temperature Detector 1 and bleeder circuit 2; Temperature Detector 1 is connected with bleeder circuit 2, also comprises capacitance decompression speed-regulating control circuit 3, and capacitance decompression speed-regulating control circuit 3 comprises a plurality of speed regulating control branch roads that use capacitance decompression; Each speed regulating control branch road all has the comparative voltage input end; Each speed regulating control branch road is started by different input voltages respectively and exports different voltages with different respectively, the voltage output end that bleeder circuit 2 has a plurality of different voltages respectively with the corresponding connection of comparative voltage input end of each speed regulating control branch road, the output terminal of each speed regulating control branch road of capacitance decompression speed-regulating control circuit 3 is connected with ac fan.
The utility model detects radiator temperature through Temperature Detector 1; Through bleeder circuit 2 output correspondent voltage; Be used for one of them branch road of conducting capacitance decompression speed-regulating control circuit 3; Capacitance decompression speed-regulating control circuit 3 is exported to ac fan with this voltage after through the different capacitance decompressions of each branch road and is realized speed governing, and this circuit is simple, under the prerequisite that realizes the ac fan variable-speed, reduces cost, reduced volume, minimizing noise, improves the utilization efficiency of electric power resource.
Particularly; As shown in Figure 2; Capacitance decompression speed-regulating control circuit 3 comprises first grade of speed regulating control branch road 31, second grade of speed regulating control branch road 32 and third gear speed regulating control branch road 33; Wherein second grade of speed regulating control branch road 32 has two comparative voltage input ends; Bleeder circuit 2 has four voltage output ends; The comparative voltage input end of first grade of speed regulating control branch road 31 is connected with first voltage output end of bleeder circuit 2, and first comparative voltage input end of second grade of speed regulating control branch road 32 is connected with second voltage output end of bleeder circuit 2, and second comparative voltage input end of second grade of speed regulating control branch road 32 is connected with the 3rd voltage output end of bleeder circuit 2; The comparative voltage input end of third gear speed regulating control branch road 33 is connected with the 4th voltage output end of bleeder circuit 3; The output terminal of the output terminal of first grade of speed regulating control branch road 31, second grade of speed regulating control branch road 32 all is connected with ac fan with the output terminal of third gear speed regulating control branch road 33, and the direct current of capacitance decompression speed-regulating control circuit 3 supplies the power taking end to be connected with DC electrical source VDD, and the interchange power taking end of capacitance decompression speed-regulating control circuit 3 is electrically connected with the city.
As shown in Figure 3, first grade of speed regulating control branch road 31 comprises the 4th comparing unit U3D, resistance R 5, resistance R 6, resistance R 7, resistance R 16, resistance R 20, diode D1, diode D2, diode D8, triode Q1, capacitor C 1 and relay R Y1;
3 pin, the diode D2 negative pole of 3 pin of resistance R 5 one ends, the 4th comparing unit U3D, resistance R 7 one ends, relay R Y1 are connected with DC electrical source VDD; 1 pin of relay R Y1 is electrically connected with the city; 10 pin of the 4th comparing unit U3D are connected with resistance R 4 one ends; Resistance R 5 the other ends are connected with 11 pin, resistance R 16 1 ends of resistance R 6 one ends, the 4th comparing unit U3D; Resistance R 16 the other ends are connected with diode D1 negative pole, and diode D1 is anodal to be connected with 13 pin, resistance R 7 the other ends, the diode D8 positive pole of the 4th comparing unit U3D, and diode D8 negative pole is connected with triode Q1 base stage; Triode Q1 collector electrode is anodal with diode D2,4 pin of relay R Y1 are connected; 2 pin of relay R Y1 are connected with capacitor C 1 one ends, resistance R 20 1 ends, and capacitor C 1 the other end, resistance R 20 the other ends are connected with ac fan, and resistance R 6 the other ends, triode Q1 emitter are connected with power supply ground.
As shown in Figure 4, second grade of speed regulating control branch road 32 comprises the second comparing unit U3B, the 3rd comparing unit U3C, resistance R 8, resistance R 9, resistance R 19, resistance R 10, resistance R 11, resistance R 12, resistance R 18, resistance R 21, diode D3, diode D4, diode D5, diode D10, diode D11, diode D12, triode Q2, capacitor C 2 and relay R Y2;
3 pin, the diode D3 negative pole of resistance R 8 one ends, resistance R 10 1 ends, resistance R 12 1 ends, relay R Y2 are connected with DC electrical source VDD; 1 pin of relay R Y2 is electrically connected with the city; 6 pin of the second comparing unit U3B are connected with resistance R 2 one ends; 9 pin of the 3rd comparing unit U3C are connected with resistance R 1 one ends, and resistance R 10 the other ends are connected with 7 pin, resistance R 18 1 ends of resistance R 11 1 ends, the second comparing unit U3B, and resistance R 18 the other ends are connected with diode D4 negative pole; Diode D4 is anodal to be connected with diode D11 positive pole, diode D12 positive pole, diode D5 positive pole, resistance R 12 the other ends, diode D10 positive pole; Diode D11 negative pole is connected with 1 pin of the second comparing unit U3B, and diode D10 negative pole is connected with triode Q2 base stage, and triode Q2 collector electrode is anodal with diode D3,4 pin of relay R Y2 are connected; 2 pin of relay R Y2 are connected with capacitor C 2 one ends, resistance R 21 1 ends, and capacitor C 2 the other ends, resistance R 21 the other ends are connected with ac fan;
Resistance R 8 the other ends are connected with 8 pin, resistance R 19 1 ends of resistance R 9 one ends, the 3rd comparing unit U3C; Resistance R 19 the other ends are connected with diode D5 negative pole; Diode D12 negative pole is connected with 14 pin of the 3rd comparing unit U3C, and resistance R 11 the other ends, triode Q2 emitter, resistance R 9 the other ends are connected with power supply ground.
As shown in Figure 5, third gear speed regulating control branch road 33 comprises the first comparing unit U3A, resistance R 13, resistance R 14, resistance R 15, resistance R 17, resistance R 22, diode D7, diode D6, diode D9, triode Q3, capacitor C 3 and relay R Y3;
3 pin, the diode D6 negative pole of resistance R 13 1 ends, resistance R 15 1 ends, relay R Y3 are connected with DC electrical source VDD; 1 pin of relay R Y3 is electrically connected with the city; 4 pin of the first comparing unit U3A are connected with resistance R 3 one ends; Resistance R 13 the other ends are connected with 5 pin, resistance R 17 1 ends of resistance R 14 1 ends, the first comparing unit U3A; Resistance R 17 the other ends are connected with diode D7 negative pole, and diode D7 is anodal to be connected with 2 pin, resistance R 15 the other ends, the diode D9 positive pole of the first comparing unit U3A, and diode D9 negative pole is connected with triode Q3 base stage; Triode Q3 collector electrode is anodal with diode D6,4 pin of relay R Y3 are connected; 2 pin of relay R Y3 are connected with capacitor C 3 one ends, resistance R 22 1 ends, and capacitor C 3 the other ends, resistance R 22 the other ends are connected with ac fan, and resistance R 14 the other ends, triode Q3 emitter are connected with power supply ground.
The first comparing unit U3A, the second comparing unit U3B, the 3rd comparing unit U3C and the 4th comparing unit U3D form a comparator; The model of this comparator is LM339; The model of diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, diode D9, diode D10, diode D11, diode D12 is IN4148, and the model of triode Q1, triode Q2, triode Q3 is MPS8050.
The thermistor RT of negative temperature coefficient is that 15 kilo-ohms, resistance R 1 are 2 kilo-ohms; Resistance R 2 is that 2 kilo-ohms, electronics R3 are that 2 kilo-ohms, electronics R4 are that 3 kilo-ohms, resistance R 5 are that 10 kilo-ohms, resistance R 6 are that 2.4 kilo-ohms, resistance R 7 are that 10 kilo-ohms, resistance R 16 are that 510 Europe, resistance R 20 are that 510 kilo-ohms, resistance R 13 are that 10 kilo-ohms, resistance R 14 are that 12 kilo-ohms, resistance R 15 are that 10 kilo-ohms, resistance R 17 are that 510 Europe, resistance R 22 are that 510 kilo-ohms, resistance R 8 are that 10 kilo-ohms, resistance R 9 are that 9.1 kilo-ohms, resistance R 19 are that 510 Europe, resistance R 10 are that 10 kilo-ohms, resistance R 11 are that 20.7 kilo-ohms, resistance R 12 are that 5.1 kilo-ohms, resistance R 18 are that 510 Europe, resistance R 21 are that 510 kilo-ohms, capacitor C 1 are 0.82 microfarad; Capacitor C 2 is 1 microfarad, and capacitor C 3 is 1.2 microfarads.
In the present embodiment, DC electrical source VDD is 12 volts.
The working principle of present embodiment is following:
1. in bleeder circuit 2, the thermistor RT of negative temperature coefficient (being called for short thermistor RT) is changing according to the temperature variation resistance, and temperature high value of resistance more is low more; Temperature low resistance more is high more, corresponding resistance 15K in the time of 25 ℃, corresponding resistance 7.73K in the time of 40 ℃; Corresponding resistance 2.38K in the time of 70 ℃
Carry out dividing potential drop according to divider resistance R1, resistance R 2, resistance R 3, resistance R 4 and calculate A, B, C, D four tunnel outputs.VDD is for stablize the DC12V power supply, corresponding resistance 7.73K when detecting radiator temperature and be 40 ℃ according to thermistor RT, and correspondence resistance 2.38K in the time of 70 ℃, according to divider resistance R1, R2, R3, R4 carry out partial pressure gauge and calculate A, B, C, D corresponding voltage value.
2. when thermistor RT detected radiator temperature and is lower than 40 ℃, calculating the A point voltage according to Fig. 2 was 2.15V, and resistance R 5,6 minutes reference potential of resistance R are 2.32V; 11 pin of the 4th comparing unit U3D terminal voltage in the same way are higher than the 10 pin end of oppisite phase voltages of the 4th comparing unit U3D; So 13 pin of the 4th comparing unit U3D go out high level, DC electrical source VDD is through resistance R 7, and diode D8 is to the base stage of triode Q1; Triode Q1 conducting; Relay R Y1 coil gets electric adhesive, and the voltage U 1 that the old friend flows after 1 step-down of civil power process capacitor C is added on the fan, makes that the ac fan rotating speed is slower.The temperature that detects radiator along with thermistor RT is more and more lower, and the resistance of thermistor RT is big more, and the voltage of ordering according to the A of Fig. 2 bleeder circuit 2 is more and more lower; So relay R Y1 conducting always, relay R Y2, not conducting of relay R Y3 are along with temperature is increasingly high; When being higher than 40 ℃; Voltage according to the A of Fig. 2 bleeder circuit 2 is ordered is increasingly high, and 11 pin of the 4th comparing unit U3D terminal voltage in the same way are lower than the 10 pin end of oppisite phase of the 4th comparing unit U3D, so 13 pin of the 4th comparing unit U3D go out low level; Not conducting of triode Q1, relay R Y1 turn-offs.(40 ℃≤T≤70 ℃ relay closes fan accelerated service this moment)
3. to detect the temperature of radiator increasingly high along with thermistor RT, and when 40 ℃≤T≤70 ℃, relay R Y1 breaks off; Relay R Y2 adhesive; This moment, the voltage at fan two ends was the voltage after 2 step-downs of civil power process capacitor C, and C1＜C2 (capacity) is according to electric capacity capacitive reactance Xc=1/ (2 π fC); The unit of Xc is ohm; Fan voltage U2＞U1 (relay R Y1 adhesive is during capacitor C 1 work) increases when radiator temperature is lower than 40 ℃ so rotation speed of the fan detects than at thermistor RT to some extent.
The 7 pin reference potentials of the second comparing unit U3B are 8.1V; The 6 pin end of oppisite phase voltages of the second comparing unit U3B raise with the rising of temperature gradually, and when temperature was 40 ℃, the 6 pin D point voltages of the second comparing unit U3B were 5.02V; The 7 pin voltages of the second comparing unit U3B are higher than the 6 pin voltages of the second comparing unit U3B; The 1 pin output high level of the second comparing unit U3B is along with the boosted voltage of temperature is increasingly high, when temperature is 70 ℃; The 6 pin D point voltages of the second comparing unit U3B are 7.38V, and 1 pin of the second comparing unit U3B is still exported high level;
The 8 pin reference potentials of the 3rd comparing unit U3C are 5.75V; The 9 pin in-phase end voltages of the 3rd comparing unit U3C raise for the rising with temperature gradually, and when temperature was 40 ℃, the 9 pin D point voltages of the 3rd comparing unit U3C were 6.45V; The 0.7V pressure drop of diode D12; 14 pin of the 3rd comparing unit U3C output high level is along with the boosted voltage of temperature is increasingly high, when the temperature that detects radiator as thermistor RT equals 70 ℃; The 9 pin D point voltages of the 3rd comparing unit U3C are 9.49V, so 14 pin of the 3rd comparing unit U3C output high level;
So when temperature was 40 ℃≤T≤70 ℃, 14 pin of 1 pin of the second comparing unit U3B and the 3rd comparing unit U3C were exported high level simultaneously, form according to diode D11, diode D12 with the door relation; Be added on the triode Q2 base stage behind the VDC vdd voltage process diode D10; Triode Q2 conducting, relay R Y2 adhesive, this moment, the voltage at fan two ends was the voltage after 2 step-downs of civil power process capacitor C; C1＜C2 (capacity); According to electric capacity capacitive reactance Xc=1/ (2 π fC), the unit of Xc is ohm, fan voltage U2＞U1 (relay R Y1 adhesive; During capacitor C 1 work), so detecting than at thermistor RT, rotation speed of the fan increases to some extent when radiator temperature is lower than 40 ℃.
4. to detect the temperature of radiator increasingly high along with thermistor RT, and when temperature was higher than 70 ℃, 14 pin of the 3rd comparing unit U3C were still exported high level; The voltage that C is ordered is along with temperature raises, the also corresponding rising of voltage, and the C point voltage is higher than 7.38V; Because the pressure drop of diode D11 is 0.7, thus this moment the second comparing unit U3B 1 pin output low level, form according to diode D11, diode D12 with the door relation; Not conducting of diode D10, relay R Y2 breaks off, relay R Y3 adhesive; This moment, the voltage at fan two ends was the voltage after 3 step-downs of civil power process capacitor C, and C2＜C3 (capacity) is according to electric capacity capacitive reactance Xc=1/ (2 π fC); The unit of Xc is ohm; Fan voltage U3＞U2 (relay R Y2 adhesive is during capacitor C 2 work) is so rotation speed of the fan is lower than 70 ℃ of increases to some extent than detect radiator temperature at thermistor RT.Therefore principle is the same when being lower than 40 ℃ with temperature, repeated description no longer.
The resistance R 15 of present embodiment is the bleeder of capacitor C 1, and resistance R 14 is the bleeder of capacitor C 2, and resistance R 13 is the bleeder of capacitor C 3; Diode D8 prevents triode Q1 misoperation; Diode D9 prevents triode Q3 misoperation, and diode D10 prevents triode Q2 misoperation, and diode D2 is the clamp diode of relay R Y1; Diode D6 is the clamp diode of relay R Y3, and diode D3 is the clamp diode of relay R Y3.Diode D1, diode D7, diode D4, diode D5, resistance R 16, resistance R 17, resistance R 18, resistance R 19 are feeder loop, strengthen hysteresis voltage, prevent that relay from switching in transition point back and forth.
Below only be the application's preferred embodiment, equivalent technical solutions on this basis still falls into the application protection domain.
Claims (8)
1. ac fan alignment circuit; Comprise Temperature Detector and bleeder circuit; Temperature Detector is connected with bleeder circuit; It is characterized in that: also comprise the capacitance decompression speed-regulating control circuit; The capacitance decompression speed-regulating control circuit comprises a plurality of speed regulating control branch roads that use capacitance decompression, and each speed regulating control branch road all has the comparative voltage input end, and each speed regulating control branch road is started by different input voltages respectively and exports different voltages with different respectively; The voltage output end that bleeder circuit has a plurality of different voltages respectively with the corresponding connection of comparative voltage input end of each speed regulating control branch road, the output terminal of each speed regulating control branch road of capacitance decompression speed-regulating control circuit is connected with ac fan.
2. ac fan alignment circuit according to claim 1; It is characterized in that: the capacitance decompression speed-regulating control circuit comprises first grade of speed regulating control branch road, second grade of speed regulating control branch road and third gear speed regulating control branch road; Wherein second grade of speed regulating control branch road has two comparative voltage input ends; Bleeder circuit has four voltage output ends; The comparative voltage input end of first grade of speed regulating control branch road is connected with first voltage output end of bleeder circuit; First comparative voltage input end of second grade of speed regulating control branch road is connected with second voltage output end of bleeder circuit, and second comparative voltage input end of second grade of speed regulating control branch road is connected with the 3rd voltage output end of bleeder circuit, and the comparative voltage input end of third gear speed regulating control branch road is connected with the 4th voltage output end of bleeder circuit; The direct current of capacitance decompression speed-regulating control circuit supplies the power taking end to be connected with DC electrical source VDD, and the interchange power taking end of capacitance decompression speed-regulating control circuit is electrically connected with the city.
3. ac fan alignment circuit according to claim 2 is characterized in that: Temperature Detector is set to the thermistor RT of negative temperature coefficient.
4. ac fan alignment circuit according to claim 3; It is characterized in that: bleeder circuit comprises resistance R 1, resistance R 2, resistance R 3 and resistance R 4, and resistance R 1 one ends are connected with thermistor RT, and thermistor RT is connected with DC electrical source VDD; Resistance R 1 the other end resistance R 2 one ends connect; Resistance R 2 the other ends are connected with resistance R 3 one ends, and resistance R 3 the other ends are connected with resistance R 4 one ends, and resistance R 4 the other ends are connected with power supply ground.
5. ac fan alignment circuit according to claim 4; It is characterized in that: first grade of speed regulating control branch road comprises the 4th comparing unit U3D, resistance R 5, resistance R 6, resistance R 7, resistance R 16, resistance R 20, diode D1, diode D2, diode D8, triode Q1, capacitor C 1 and relay R Y1;
3 pin, the diode D2 negative pole of 3 pin of resistance R 5 one ends, the 4th comparing unit U3D, resistance R 7 one ends, relay R Y1 are connected with DC electrical source VDD; 1 pin of relay R Y1 is electrically connected with the city; 10 pin of the 4th comparing unit U3D are connected with resistance R 4 one ends; Resistance R 5 the other ends are connected with 11 pin, resistance R 16 1 ends of resistance R 6 one ends, the 4th comparing unit U3D; Resistance R 16 the other ends are connected with diode D1 negative pole, and diode D1 is anodal to be connected with 13 pin, resistance R 7 the other ends, the diode D8 positive pole of the 4th comparing unit U3D, and diode D8 negative pole is connected with triode Q1 base stage; Triode Q1 collector electrode is anodal with diode D2,4 pin of relay R Y1 are connected; 2 pin of relay R Y1 are connected with capacitor C 1 one ends, resistance R 20 1 ends, and capacitor C 1 the other end, resistance R 20 the other ends are connected with ac fan, and resistance R 6 the other ends, triode Q1 emitter are connected with power supply ground.
6. ac fan alignment circuit according to claim 4 is characterized in that: second grade of speed regulating control branch road comprises the second comparing unit U3B, the 3rd comparing unit U3C, resistance R 8, resistance R 9, resistance R 19, resistance R 10, resistance R 11, resistance R 12, resistance R 18, resistance R 21, diode D3, diode D4, diode D5, diode D10, diode D11, diode D12, triode Q2, capacitor C 2 and relay R Y2;
3 pin, the diode D3 negative pole of resistance R 8 one ends, resistance R 10 1 ends, resistance R 12 1 ends, relay R Y2 are connected with DC electrical source VDD; 1 pin of relay R Y2 is electrically connected with the city; 6 pin of the second comparing unit U3B are connected with resistance R 2 one ends; 9 pin of the 3rd comparing unit U3C are connected with resistance R 1 one ends, and resistance R 10 the other ends are connected with 7 pin, resistance R 18 1 ends of resistance R 11 1 ends, the second comparing unit U3B, and resistance R 18 the other ends are connected with diode D4 negative pole; Diode D4 is anodal to be connected with diode D11 positive pole, diode D12 positive pole, diode D5 positive pole, resistance R 12 the other ends, diode D10 positive pole; Diode D11 negative pole is connected with 1 pin of the second comparing unit U3B, and diode D10 negative pole is connected with triode Q2 base stage, and triode Q2 collector electrode is anodal with diode D3,4 pin of relay R Y2 are connected; 2 pin of relay R Y2 are connected with capacitor C 2 one ends, resistance R 21 1 ends, and capacitor C 2 the other ends, resistance R 21 the other ends are connected with ac fan;
Resistance R 8 the other ends are connected with 8 pin, resistance R 19 1 ends of resistance R 9 one ends, the 3rd comparing unit U3C; Resistance R 19 the other ends are connected with diode D5 negative pole; Diode D12 negative pole is connected with 14 pin of the 3rd comparing unit U3C, and resistance R 11 the other ends, triode Q2 emitter, resistance R 9 the other ends are connected with power supply ground.
7. ac fan alignment circuit according to claim 4 is characterized in that: third gear speed regulating control branch road comprises the first comparing unit U3A, resistance R 13, resistance R 14, resistance R 15, resistance R 17, resistance R 22, diode D7, diode D6, diode D9, triode Q3, capacitor C 3 and relay R Y3;
3 pin, the diode D6 negative pole of resistance R 13 1 ends, resistance R 15 1 ends, relay R Y3 are connected with DC electrical source VDD; 1 pin of relay R Y3 is electrically connected with the city; 4 pin of the first comparing unit U3A are connected with resistance R 3 one ends; Resistance R 13 the other ends are connected with 5 pin, resistance R 17 1 ends of resistance R 14 1 ends, the first comparing unit U3A; Resistance R 17 the other ends are connected with diode D7 negative pole, and diode D7 is anodal to be connected with 2 pin, resistance R 15 the other ends, the diode D9 positive pole of the first comparing unit U3A, and diode D9 negative pole is connected with triode Q3 base stage; Triode Q3 collector electrode is anodal with diode D6,4 pin of relay R Y3 are connected; 2 pin of relay R Y3 are connected with capacitor C 3 one ends, resistance R 22 1 ends, and capacitor C 3 the other ends, resistance R 22 the other ends are connected with ac fan, and resistance R 14 the other ends, triode Q3 emitter are connected with power supply ground.
8. ac fan alignment circuit according to claim 2 is characterized in that: DC electrical source VDD is 12 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220113898XU CN202483920U (en) | 2012-03-23 | 2012-03-23 | Alternating-current fan speed regulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220113898XU CN202483920U (en) | 2012-03-23 | 2012-03-23 | Alternating-current fan speed regulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483920U true CN202483920U (en) | 2012-10-10 |
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ID=46958346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220113898XU Expired - Fee Related CN202483920U (en) | 2012-03-23 | 2012-03-23 | Alternating-current fan speed regulation circuit |
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| Country | Link |
|---|---|
| CN (1) | CN202483920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154021A (en) * | 2014-08-14 | 2014-11-19 | 技嘉科技股份有限公司 | Fan volume control system and automatic fan volume control method applying same |
| CN108953182A (en) * | 2018-06-14 | 2018-12-07 | 珠海格力电器股份有限公司 | Device and method for controlling fan to start and warm air blower using device |
-
2012
- 2012-03-23 CN CN201220113898XU patent/CN202483920U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154021A (en) * | 2014-08-14 | 2014-11-19 | 技嘉科技股份有限公司 | Fan volume control system and automatic fan volume control method applying same |
| CN104154021B (en) * | 2014-08-14 | 2016-03-09 | 技嘉科技股份有限公司 | Fan sound-volume control system and apply the fan volume automatic control method of described control system |
| CN108953182A (en) * | 2018-06-14 | 2018-12-07 | 珠海格力电器股份有限公司 | Device and method for controlling fan to start and warm air blower using device |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20121010 Termination date: 20170323 |