CN204716583U - A kind of ac fan alignment circuit - Google Patents
A kind of ac fan alignment circuit Download PDFInfo
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- CN204716583U CN204716583U CN201520345613.9U CN201520345613U CN204716583U CN 204716583 U CN204716583 U CN 204716583U CN 201520345613 U CN201520345613 U CN 201520345613U CN 204716583 U CN204716583 U CN 204716583U
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Abstract
A kind of ac fan alignment circuit, relate to alignment circuit technical field, its structure comprises the temperature sampling circuit that real time temperature can be converted into voltage signal, be preset with the comparison drive circuit of reference potential, switching tube, relay and self-coupling voltage reducing transformer, the real time temperature of collection is converted into real-time voltage signal and delivers to and compare drive circuit by described temperature sampling circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered, speed governing can be carried out to fan, and then extend the working life of fan, reduce noise, reduce electricity consumption.
Description
Technical field
The utility model relates to alignment circuit technical field, particularly relates to a kind of ac fan alignment circuit.
Background technique
Fan is a kind of electrical equipment for dispelling the heat, the faster radiating effect of the rotating speed of fan is better theoretically, but it is also larger to do the noise produced like this, if and fan still runs up when heat is less, the waste of electric energy will be caused, if do not carry out speed governing to fan, the long-time high speed operation of fan, not only affect the working life of fan, bring unnecessary noise problem, but also can electric energy be wasted.
Model utility content
The purpose of this utility model is avoid deficiency of the prior art and provide a kind of ac fan alignment circuit, and this ac fan alignment circuit can carry out speed governing to fan, and then extends the working life of fan, reduces noise, reduces electricity consumption.
The purpose of this utility model is achieved through the following technical solutions:
A kind of ac fan alignment circuit is provided, comprise the temperature sampling circuit that real time temperature can be converted into voltage signal, be preset with the comparison drive circuit of reference potential, switching tube, relay and self-coupling voltage reducing transformer, the real time temperature of collection is converted into real-time voltage signal and delivers to and compare drive circuit by described temperature sampling circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered.
Described temperature sampling circuit comprises bleeder circuit, and described bleeder circuit comprises and is serially connected with thermistor RT between VDD-to-VSS and resistance R81, and the contact between described thermistor RT and resistance R81 is connected with the described input end comparing drive circuit.
Described bleeder circuit is connected to voltage follower and amplitude limiter circuit with described comparison between drive circuit, the output terminal of described bleeder circuit is connected with the input end of described voltage follower, the output terminal of described voltage follower is connected with the input end of described amplitude limiter circuit, and the output terminal of described amplitude limiter circuit is connected with the described input end comparing drive circuit.
Described voltage follower comprises operational amplifier U13A, resistance R28, resistance R26 and electric capacity C47, the output terminal of described bleeder circuit and one end of resistance R28, one end of electric capacity C47 is connected with the positive input terminal 3 of operational amplifier U13A, the other end of described resistance R28 is connected with the other end of electric capacity C47 and ground, negative input end 2 and the output terminal 1 of operational amplifier U13A, one end of resistance R26 connects, amplitude limiter circuit described in another termination of resistance R26, the power supply input anode 4 of operational amplifier U13A meets voltage+12V, the power supply input negative terminal 11 of operational amplifier U13A meets-12V.
Described amplitude limiter circuit comprises diode D9, diode D10 and electric capacity C55, one end of the positive pole of another terminating diode D9 of described resistance R26, the negative pole of diode D10 and electric capacity C55, the other end ground connection of electric capacity C55, the negative pole of diode D9 meets power supply 3.3V, the plus earth of diode D10, the negative pole of diode D1O connects the described input end comparing drive circuit.
Described switching tube is set to field effect transistor Q3, described relay is the coil comprising pin 1 and pin 2, contact 3, the relay R LY2 of contact 4 and contact 5, described self-coupling voltage reducing transformer comprises 0V tap, the self-coupling voltage reducing transformer T1 of 150V tap and 220V tap, one end of grid connecting resistance R80 of described field effect transistor Q3 and one end of resistance R56, one end of the other end connecting resistance R24 of described resistance R80, one end of electric capacity C50 and the described output terminal comparing drive circuit, another termination power+12V of described resistance R24, the other end of the other end connecting resistance R56 of described electric capacity C50, the source electrode of field effect transistor Q3 and ground, the drain electrode 3 of described field effect transistor Q3 connects the positive pole of diode D5 and the pin 2 of coil, the pin 1 of the negative terminal circle of described diode D5 and power supply+12V, one end of contact 4 wind-receiving fan of described relay, another termination civil power zero line IN_N of described fan and the 0V tap of self-coupling voltage reducing transformer T1, the contact 5 of the 150V tap contact relay RLY2 of described self-coupling voltage reducing transformer T1, the contact 3 of described relay R LY2 meets 220V tap and the civil power live wire IN_L of self-coupling voltage reducing transformer T1.
The beneficial effects of the utility model: a kind of ac fan alignment circuit of the present utility model, the real time temperature of collection is converted into real-time voltage signal by temperature sampling circuit to deliver to and compare drive circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered, speed governing can be carried out to fan, and then extend the working life of fan, reduce noise, reduce electricity consumption.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further model utility, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the schematic diagram of the temperature sampling circuit of a kind of ac fan alignment circuit of the present utility model, voltage follower and amplitude limiter circuit.
Fig. 2 is a kind of voltage follower of ac fan alignment circuit of the present utility model and the schematic diagram of amplitude limiter circuit.
Fig. 3 is the schematic diagram of the pipe that opens the light of a kind of ac fan alignment circuit of the present utility model, relay and self-coupling voltage reducing transformer.
Embodiment
With the following Examples the utility model is further described.
A kind of ac fan alignment circuit of the present embodiment, as shown in Figure 1 to Figure 3, comprise the temperature sampling circuit that real time temperature can be converted into voltage signal, be preset with the comparison drive circuit of reference potential, switching tube, relay and self-coupling voltage reducing transformer, the real time temperature of collection is converted into real-time voltage signal and delivers to and compare drive circuit by described temperature sampling circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered.
A kind of ac fan alignment circuit of the present embodiment, the real time temperature of collection is converted into real-time voltage signal by temperature sampling circuit to deliver to and compare drive circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered, speed governing can be carried out to fan, and then extend the working life of fan, reduce noise, reduce electricity consumption.
Wherein, described temperature sampling circuit comprises bleeder circuit, and described bleeder circuit comprises and is serially connected with thermistor RT between VDD-to-VSS and resistance R81, and the contact between described thermistor RT and resistance R81 is connected with the described input end comparing drive circuit.
Wherein, described bleeder circuit is connected to voltage follower and amplitude limiter circuit with described comparison between drive circuit, the output terminal of described bleeder circuit is connected with the input end of described voltage follower, the output terminal of described voltage follower is connected with the input end of described amplitude limiter circuit, the output terminal of described amplitude limiter circuit is connected with the described input end comparing drive circuit, voltage follower plays buffering, isolation, improves load capacity, the voltage that follower exports by amplitude limiter circuit carries out amplitude limit, is processed into the magnitude of voltage that can input and compare drive circuit.
Wherein, described voltage follower comprises operational amplifier U13A, resistance R28, resistance R26 and electric capacity C47, the output terminal of described bleeder circuit and one end of resistance R28, one end of electric capacity C47 is connected with the positive input terminal 3 of operational amplifier U13A, the other end of described resistance R28 is connected with the other end of electric capacity C47 and ground, negative input end 2 and the output terminal 1 of operational amplifier U13A, one end of resistance R26 connects, amplitude limiter circuit described in another termination of resistance R26, the power supply input anode 4 of operational amplifier U13A meets voltage+12V, the power supply input negative terminal 11 of operational amplifier U13A meets-12V.
Wherein, described amplitude limiter circuit comprises diode D9, diode D10 and electric capacity C55, one end of the positive pole of another terminating diode D9 of described resistance R26, the negative pole of diode D10 and electric capacity C55, the other end ground connection of electric capacity C55, the negative pole of diode D9 meets power supply 3.3V, the plus earth of diode D10, the negative pole of diode D1O connects the described input end comparing drive circuit.
Wherein, described switching tube is set to field effect transistor Q3, described relay is the coil comprising pin 1 and pin 2, contact 3, the relay R LY2 of contact 4 and contact 5, described self-coupling voltage reducing transformer comprises 0V tap, the self-coupling voltage reducing transformer T1 of 150V tap and 220V tap, one end of grid connecting resistance R80 of described field effect transistor Q3 and one end of resistance R56, one end of the other end connecting resistance R24 of described resistance R80, one end of electric capacity C50 and the described output terminal comparing drive circuit, another termination power+12V of described resistance R24, the other end of the other end connecting resistance R56 of described electric capacity C50, the source electrode of field effect transistor Q3 and ground, the drain electrode 3 of described field effect transistor Q3 connects the positive pole of diode D5 and the pin 2 of coil, the pin 1 of the negative terminal circle of described diode D5 and power supply+12V, one end of contact 4 wind-receiving fan of described relay, another termination civil power zero line IN_N of described fan and the 0V tap of self-coupling voltage reducing transformer T1, the contact 5 of the 150V tap contact relay RLY2 of described self-coupling voltage reducing transformer T1, the contact 3 of described relay R LY2 meets 220V tap and the civil power live wire IN_L of self-coupling voltage reducing transformer T1.The circuit of switching tube, relay and self-coupling voltage reducing transformer composition is fairly simple.
Working principle:
The thermistor RT of negative temperature coefficient is according to temperature variation resistance in change, and temperature more high value of resistance is lower, and temperature more low resistance is higher, and therefore A point voltage changes along with the change of temperature, and the size of A point voltage reflects the height of temperature in real time.
Fan power supply voltage, is provided by a self-coupling voltage reducing transformer T1: 220VAC becomes 150VAC.
The temperature signal B that temperature sampling circuit obtains gives and compares drive circuit, and comparing drive circuit can be realized by comparator, compares the actual temp value that drive circuit is judged to detect.Suppose that comparing the default voltage reference of drive circuit is " C ", when the temperature detected is less than threshold value " C ", relatively drive circuit sends high level, the conducting of field effect transistor pipe, relay R LY2 adhesive, 4 pin and 5 pin of relay R LY2 are connected, then fan FAN connects 150V voltage, and therefore rotating speed is slower.When the temperature detected is greater than voltage reference " C ", compares drive circuit and send low level, the not conducting of field effect transistor pipe, relay R LY2 not adhesive, 3 pin and 4 pin of relay R LY2 are connected, then 220V voltage connected by fan, and therefore rotating speed is obviously accelerated.
This circuit, by temperature detecting, controls different electric pressures and powers to ac fan.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection domain; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. an ac fan alignment circuit, it is characterized in that: comprise the temperature sampling circuit that real time temperature can be converted into voltage signal, be preset with the comparison drive circuit of reference potential, switching tube, relay and self-coupling voltage reducing transformer, the real time temperature of collection is converted into real-time voltage signal and delivers to and compare drive circuit by described temperature sampling circuit, real-time voltage is less than reference potential and then compares the conducting of drive circuit driving switch pipe, the switching tube conducting voltage tap that then self-coupling voltage reducing transformer connected by relay is that fan is powered, real-time voltage is greater than reference potential and then compares the disconnection of drive circuit driving switch pipe, switching tube disconnects, and the high-voltage tap that self-coupling voltage reducing transformer connected by relay is that fan is powered.
2. a kind of ac fan alignment circuit as claimed in claim 1, it is characterized in that: described temperature sampling circuit comprises bleeder circuit, described bleeder circuit comprises and is serially connected with thermistor RT between VDD-to-VSS and resistance R81, and the contact between described thermistor RT and resistance R81 is connected with the described input end comparing drive circuit.
3. a kind of ac fan alignment circuit as claimed in claim 2, it is characterized in that: described bleeder circuit is connected to voltage follower and amplitude limiter circuit with described comparison between drive circuit, the output terminal of described bleeder circuit is connected with the input end of described voltage follower, the output terminal of described voltage follower is connected with the input end of described amplitude limiter circuit, and the output terminal of described amplitude limiter circuit is connected with the described input end comparing drive circuit.
4. a kind of ac fan alignment circuit as claimed in claim 3, it is characterized in that: described voltage follower comprises operational amplifier U13A, resistance R28, resistance R26 and electric capacity C47, the output terminal of described bleeder circuit and one end of resistance R28, one end of electric capacity C47 is connected with the positive input terminal 3 of operational amplifier U13A, the other end of described resistance R28 is connected with the other end of electric capacity C47 and ground, negative input end 2 and the output terminal 1 of operational amplifier U13A, one end of resistance R26 connects, amplitude limiter circuit described in another termination of resistance R26, the power supply input anode 4 of operational amplifier U13A meets voltage+12V, the power supply input negative terminal 11 of operational amplifier U13A meets-12V.
5. a kind of ac fan alignment circuit as claimed in claim 4, it is characterized in that: described amplitude limiter circuit comprises diode D9, diode D10 and electric capacity C55, one end of the positive pole of another terminating diode D9 of described resistance R26, the negative pole of diode D10 and electric capacity C55, the other end ground connection of electric capacity C55, the negative pole of diode D9 meets power supply 3.3V, the plus earth of diode D10, the negative pole of diode D1O connects the described input end comparing drive circuit.
6. a kind of ac fan alignment circuit as claimed in claim 1, it is characterized in that: described switching tube is set to field effect transistor Q3, described relay is the coil comprising pin 1 and pin 2, contact 3, the relay R LY2 of contact 4 and contact 5, described self-coupling voltage reducing transformer comprises 0V tap, the self-coupling voltage reducing transformer T1 of 150V tap and 220V tap, one end of grid connecting resistance R80 of described field effect transistor Q3 and one end of resistance R56, one end of the other end connecting resistance R24 of described resistance R80, one end of electric capacity C50 and the described output terminal comparing drive circuit, another termination power+12V of described resistance R24, the other end of the other end connecting resistance R56 of described electric capacity C50, the source electrode of field effect transistor Q3 and ground, the drain electrode 3 of described field effect transistor Q3 connects the positive pole of diode D5 and the pin 2 of coil, the pin 1 of the negative terminal circle of described diode D5 and power supply+12V, one end of contact 4 wind-receiving fan of described relay, another termination civil power zero line IN_N of described fan and the 0V tap of self-coupling voltage reducing transformer T1, the contact 5 of the 150V tap contact relay RLY2 of described self-coupling voltage reducing transformer T1, the contact 3 of described relay R LY2 meets 220V tap and the civil power live wire IN_L of self-coupling voltage reducing transformer T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345613.9U CN204716583U (en) | 2015-05-26 | 2015-05-26 | A kind of ac fan alignment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345613.9U CN204716583U (en) | 2015-05-26 | 2015-05-26 | A kind of ac fan alignment circuit |
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| CN204716583U true CN204716583U (en) | 2015-10-21 |
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| CN201520345613.9U Active CN204716583U (en) | 2015-05-26 | 2015-05-26 | A kind of ac fan alignment circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257590A (en) * | 2017-06-16 | 2017-10-17 | 广东美的厨房电器制造有限公司 | control method and cooking appliance |
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2015
- 2015-05-26 CN CN201520345613.9U patent/CN204716583U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257590A (en) * | 2017-06-16 | 2017-10-17 | 广东美的厨房电器制造有限公司 | control method and cooking appliance |
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