CN203399036U - Automatic control circuit for fan - Google Patents
Automatic control circuit for fan Download PDFInfo
- Publication number
- CN203399036U CN203399036U CN201320526542.3U CN201320526542U CN203399036U CN 203399036 U CN203399036 U CN 203399036U CN 201320526542 U CN201320526542 U CN 201320526542U CN 203399036 U CN203399036 U CN 203399036U
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- fan
- resistance
- integrated transporting
- transporting discharging
- triode
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- Control Of Electric Motors In General (AREA)
Abstract
An automatic control circuit for a fan comprises a temperature detection module and a fan rotating speed control module, wherein the temperature detection module is used for detecting the temperature and generating corresponding electric signals, and the fan rotating speed control module is used for controlling the rotating speed of the fan according to the electric signals generated by the temperature detection module. The automatic control circuit for the fan not only can automatically change the rotating speed of the fan according to the internal temperature of the same power supply or the same charger, but also can automatically regulates the stable amplifying condition of a triode when being applied to different models of power supplies or chargers or electrical equipment which needs to be radiated, thereby automatically regulating the speed of the fan in constant-speed rotation without manual debugging, saving manpower, being conductive to the cost reduction, and being high in accuracy. In addition, whether the fan is started can be directly indicated through a light-emitting diode.
Description
Technical field
The utility model relates to a kind of fan automatic control circuit.
Background technology
At electronic information field, reduce costs, energy-conserving and environment-protective, to reduce volume be the target of pursuing in the industry always, for some medium-and-large-sized power supplys and charger or electric equipment in volume-diminished, what bring is the significantly rising of temperature rise, the life-span of electric equipment and safety have been caused to serious threat, what arise at the historic moment is exactly the cooling method of wind energy, because power supply caloric value under different load conditions is different, yet, existing radiator fan, with constant rotary speed working, is unfavorable for environmental protection and energy saving; In addition, when breaking phenomena appears in fan, that is by the safety of using is caused to serious threat, so need to go the state of fan to detect constantly; At present, portions of electronics equipment checks and control as computer can adopt fan control chip, but fan control chip price general charged is more expensive, if be applied to power supply or charger, can cause undoubtedly the increase of cost and the waste of resource.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of simple in structure and fan automatic control circuit that cost is low.
For achieving the above object, the utility model adopts following technical scheme:
An automatic control circuit, it comprises temperature detecting module and rotation speed of the fan control module; Temperature detecting module is for detection of temperature and generate the corresponding signal of telecommunication, and rotation speed of the fan control module is controlled the rotating speed of fan for the signal of telecommunication generating according to temperature detecting module.
Further, temperature detecting module is thermistor.
Further, the thermistor that temperature detecting module is negative temperature coefficient; Rotation speed of the fan control module comprises the first resistance, the second resistance, the 3rd resistance and triode; The collector electrode of this triode connects the negative voltage side of fan, the positive voltage terminal of this fan connects a DC power supply, the emitter of this triode is by the 3rd grounding through resistance, the base stage of this triode is connected DC power supply by the second resistance with thermistor successively, one end of the first resistance is connected between this second resistance and thermistor, the other end ground connection of the first resistance.
Further, fan automatic control circuit also comprises the fan work state indicating module for whether starting according to the control signal indication fan of rotation speed of the fan control module.
Further, fan work state indicating module comprises the 3rd resistance to the ten resistance, the first integrated transporting discharging, the second integrated transporting discharging and light-emitting diode, the emitter of this triode connects DC power supply by the 3rd resistance, the in-phase end of this first integrated transporting discharging is connected between this second resistance and thermistor by the 7th resistance, the end of oppisite phase of this first integrated transporting discharging is by the 6th grounding through resistance, also by the 5th resistance, connect this DC power supply, the output of this first integrated transporting discharging is successively by the 8th resistance and the 9th grounding through resistance, the in-phase end of this second integrated transporting discharging is connected between the 8th resistance and the 9th resistance, the end of oppisite phase of this second integrated transporting discharging connects the emitter of this triode, the output of this second integrated transporting discharging connects the anode of this light-emitting diode by the tenth resistance, the minus earth of this light-emitting diode.
The beneficial effects of the utility model are as follows:
Above-mentioned utility model not only can change according to same power supply or charger internal temperature the rotating speed of fan automatically, and while being applied to electric equipment that the power supply of different model or charger maybe need to dispel the heat, also can automatically regulate the stable magnifying state of triode, thereby the speed while automatically regulating fan constant revolution, without manual debugging, save manpower, be beneficial to and reduce costs, and accuracy is high.In addition, also can indicate intuitively fan whether to start by light-emitting diode.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the better embodiment of the utility model fan automatic control circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Refer to Fig. 1, the utility model relates to a kind of fan automatic control circuit, being applied to power supply or charger maybe needs the electric equipment dispelling the heat, and its better embodiment comprises thermistor Rs, integrated transporting discharging U1, integrated transporting discharging U2 and the LED of resistance R 1 to R10, triode Q1, negative temperature coefficient.
The collector electrode of this triode Q1 connects the negative voltage side of fan F, the positive voltage terminal of this fan F connects a DC power supply VCC, the emitter of this triode Q1 is by resistance R 4 ground connection, also by resistance R 3, connect DC power supply VCC, the base stage of this triode Q1 is connected this DC power supply VCC successively with thermistor Rs by resistance R 2, one end of resistance R 1 is connected between this resistance R 2 and thermistor Rs, the other end ground connection of resistance R 1.The in-phase end of this integrated transporting discharging U1 is connected between this resistance R 2 and resistance R s by resistance R 7, the end of oppisite phase of this integrated transporting discharging U1 is by resistance R 6 ground connection, also by resistance R 5, connect this DC power supply VCC, the output of this integrated transporting discharging U1 is successively by resistance R 8 and resistance R 9 ground connection, the in-phase end of this integrated transporting discharging U2 is connected between resistance R 8 and resistance R 9, the end of oppisite phase of this integrated transporting discharging U2 connects the emitter of this triode Q1, the output of this integrated transporting discharging U2 connects the anode of this LED, the minus earth of this LED by resistance R 10.
When power supply or charger internal temperature are when lower, thermistor Rs resistance is larger, makes the voltage of resistance R 1 less, and is less than the cut-in voltage of triode Q1, and then makes triode Q1 cut-off, and fan F does not work, and is conducive to energy-conservation.Now, the voltage of the in-phase end of integrated transporting discharging U1 is less than the voltage of its end of oppisite phase, this integrated transporting discharging U1 output low level signal, make the voltage of the in-phase end of this integrated transporting discharging U2 be less than the voltage of its end of oppisite phase, and then make this integrated transporting discharging U2 output low level signal, thereby make this LED not luminous, to indicate intuitively this fan F not work.
When power supply or the rising of charger internal temperature, thermistor Rs diminishes, it is large that the voltage of this resistance R 1 becomes, the electric current of triode Q1 is increased gradually, and then make triode Q1 in magnifying state, fan F starts and slowly runs, along with temperature continues to raise, thermistor Rs continues to diminish, it is large that the voltage of resistance R 2 continues to become, it is large that the electric current of triode Q1 continues to become, making fan F accelerate to rotate lowers the temperature to equipment, until power supply or charger internal temperature remain on stationary value, thermistor Rs resistance is stable, the base voltage of triode Q1 is stable, and then make the magnifying state of triode Q1 also thereupon stable, thereby make fan F with constant revolution.When fan F starts, the voltage of the in-phase end of this integrated transporting discharging U1 is greater than its end of oppisite phase voltage, the output output high level signal of this integrated transporting discharging U1, make the voltage of the in-phase end of this integrated transporting discharging U2 be greater than the voltage of its end of oppisite phase, the output output high level signal of this integrated transporting discharging U2, thereby make this LED luminous, to indicate intuitively this fan F to work.
The power supply of different model or charger maybe need the electric equipment dispelling the heat, its internal temperature stationary value is not identical, the stationary value of thermistor Rs is not identical yet, and the stable magnifying state of triode Q1 is not identical yet, thereby makes fan F with different constant revolutions.As can be seen here, this fan automatic control circuit not only can change according to same power supply or charger internal temperature the rotating speed of fan F automatically, and while being applied to electric equipment that the power supply of different model or charger maybe need to dispel the heat, also can automatically regulate the stable magnifying state of triode Q1, thereby the speed while automatically regulating fan F constant revolution, without manual debugging, saves manpower, be beneficial to and reduce costs, and accuracy is high.
From above-mentioned operation principle, this thermistor Rs for detection of equipment as the temperature in power supply or charger and generate the corresponding signal of telecommunication, therefore in other execution modes, this thermistor Rs can be by the temperature detecting module that possesses above-mentioned functions as the occasionally replacement such as temp probe of thermoelectricity.
Resistance R 1, resistance R 2, resistance R 4 and triode Q1 form a rotation speed of the fan control module, and it controls the rotating speed of fan F for the signal of telecommunication generating according to temperature detecting module.Therefore in other embodiment, this rotation speed of the fan control module can adopt any circuit module that possesses above-mentioned functions.
Resistance R 3, resistance R 4 to resistance R 10, integrated transporting discharging U1, integrated transporting discharging U2 and LED form a fan work state indicating module, and whether it starts for the control signal indication fan according to rotation speed of the fan control module.
In addition, it should be noted that, the supply power mode of integrated transporting discharging U1 and integrated transporting discharging U2 is: DC power supply VCC is connected the feeder ear of an integrated transporting discharging U3, the earth terminal ground connection of integrated transporting discharging U3, wherein, integrated transporting discharging U1, integrated transporting discharging U2 and integrated transporting discharging U3 form an operational amplifier (as the model operational amplifier that is LM358), three parts that integrated transporting discharging U1, integrated transporting discharging U2 and integrated transporting discharging U3 essence are same chip IC.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection range of the utility model claim within.
Claims (5)
1. a fan automatic control circuit, is characterized in that: it comprises temperature detecting module and rotation speed of the fan control module; Temperature detecting module is for detection of temperature and generate the corresponding signal of telecommunication, and rotation speed of the fan control module is controlled the rotating speed of fan for the signal of telecommunication generating according to temperature detecting module.
2. fan automatic control circuit as claimed in claim 1, is characterized in that: temperature detecting module is thermistor.
3. fan automatic control circuit as claimed in claim 2, is characterized in that: the thermistor that temperature detecting module is negative temperature coefficient (RS); Rotation speed of the fan control module comprises the first resistance (R1), the second resistance (R2), the 3rd resistance (R4) and triode (Q1); The collector electrode of this triode (Q1) connects the negative voltage side of fan (F), the positive voltage terminal of this fan (F) connects a DC power supply (VCC), the emitter of this triode (Q1) is by the 3rd resistance (R4) ground connection, the base stage of this triode (Q1) is connected DC power supply (VCC) by the second resistance (R2) with thermistor (RS) successively, one end of the first resistance (R1) is connected between this second resistance (R2) and thermistor (RS), the other end ground connection of the first resistance (R1).
4. fan automatic control circuit as claimed in claim 3, is characterized in that: fan automatic control circuit also comprises the fan work state indicating module for whether starting according to the control signal indication fan of rotation speed of the fan control module.
5. fan automatic control circuit as claimed in claim 4, is characterized in that: fan work state indicating module comprises that the 3rd resistance (R4) is to the tenth resistance (R10), the first integrated transporting discharging (U1), the second integrated transporting discharging (U2) and light-emitting diode (LED), the emitter of this triode (Q1) connects DC power supply (VCC) by the 4th resistance (R3), the in-phase end of this first integrated transporting discharging (U1) is connected between this second resistance (R2) and thermistor (RS) by the 7th resistance (R7), the end of oppisite phase of this first integrated transporting discharging (U1) is by the 6th resistance (R6) ground connection, also by the 5th resistance (R5), connect this DC power supply (VCC), the output of this first integrated transporting discharging (U1) is successively by the 8th resistance (R8) and the 9th resistance (R9) ground connection, the in-phase end of this second integrated transporting discharging (U2) is connected between the 8th resistance (R8) and the 9th resistance (R9), the end of oppisite phase of this second integrated transporting discharging (U2) connects the emitter of this triode (Q1), the output of this second integrated transporting discharging (U2) connects the anode of this light-emitting diode (LED) by the tenth resistance (R10), the minus earth of this light-emitting diode (LED).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526542.3U CN203399036U (en) | 2013-08-27 | 2013-08-27 | Automatic control circuit for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526542.3U CN203399036U (en) | 2013-08-27 | 2013-08-27 | Automatic control circuit for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399036U true CN203399036U (en) | 2014-01-15 |
Family
ID=49910533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320526542.3U Withdrawn - After Issue CN203399036U (en) | 2013-08-27 | 2013-08-27 | Automatic control circuit for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203399036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475284A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Automatic control circuit for fan |
-
2013
- 2013-08-27 CN CN201320526542.3U patent/CN203399036U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475284A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Automatic control circuit for fan |
| CN103475284B (en) * | 2013-08-27 | 2017-06-30 | 湖南崧顺科技有限公司 | Automatic control circuit for fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160912 Granted publication date: 20140115 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170312 Granted publication date: 20140115 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170312 Granted publication date: 20140115 |
|
| PP01 | Preservation of patent right | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140115 Effective date of abandoning: 20170630 |
|
| AV01 | Patent right actively abandoned |