CN2612982Y - Linear controller for controlling rotation speed of system fan based on ambient temperature - Google Patents
Linear controller for controlling rotation speed of system fan based on ambient temperature Download PDFInfo
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- CN2612982Y CN2612982Y CN 02281863 CN02281863U CN2612982Y CN 2612982 Y CN2612982 Y CN 2612982Y CN 02281863 CN02281863 CN 02281863 CN 02281863 U CN02281863 U CN 02281863U CN 2612982 Y CN2612982 Y CN 2612982Y
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Abstract
A system fan rotating speed linear controlling device base on the environment temperature comprises a temperature collecting element and a rotating speed controlling circuit, wherein the controlling circuit comprises a constant flow feedback circuit and a driving element, the temperature collecting element bridge connects an input and output end of the constant flow feedback circuit in the rotating speed controlling circuit, the output end in the constant flow feedback circuit is connected with the input end of the driving element, the output end of the driving element is connected with the fan power input end, the temperature collecting element is a thermistor and is equipped on a gas inlet of the computer system fan. The utility model adopts the constant flow source controlling scheme, transforms the change of environmental temperature to the change of voltage on a back degree enlarging circuit input end by the thermistor element, thereby providing precise controlling signals for the system fan rotating speed, and making the system fan rotating speed totally linearly controlled, which maintains the system noise always in a lower level on the condition of meeting the system radiation and temperature lowering of the computer.
Description
Technical field
The utility model relates to a kind of system fan rotating speed linear controller based on environment temperature, and is especially a kind of according to environment temperature in the computing machine, realizes the accurate linear controller to the system fan rotating speed, belongs to the application of electronic technology field.
Background technology
Along with the continuous development of computer technology and the continuous lifting of product quality, people are also improving day by day to the requirement of the comprehensive usability of computing machine complete machine.In comprehensive usability, people have produced higher requirement to the reduction of main frame noise, wish satisfying under the prerequisite of system radiating, and noise is reduced as much as possible.
The noise of desk-top computer comprises power supply fan and cpu fan mainly from cooling fan.Because the computer industry constantly weeds out the old and bring forth the new, especially laying siege to aspect computer operation speed, make that the parts of computer-internal and even the temperature of complete machine are raise.In the past, the method that solves temperature rising problem is to improve the rotating speed of power supply fan and cpu fan, but when improving rotating speed, has also improved the noise of computing machine complete machine.
The method that solves temperature rising and inhibition noise mainly contains following several:
1, add big fan, reduce rotating speed: adopt powerful fan and the rotating speed of fan is reduced relatively, ventilation is increased, this moment is because rotating speed is lower, so noise is little.This method lacks perfection, because when computing machine was not worked under big load condition, temperature was not high, so understand some ventilation waste.
2, utilize temperature control circuit, regulate rotation speed of the fan: this method is that temperature province is artificially set 2-3 gear, and corresponding with it setting rotating speed of fan staged gear.Judge pairing temperature province by the actual temperature value that records of temperature-measuring element, and then the control fan runs on the rotating speed gear of setting.This method is just carried out Approximate Equivalent with the linear relationship of temperature and exhaust air rate, so can not control rotation speed of the fan accurately.
Generally, computing machine is not to always work under the full load condition, and there is no need to make the fan full-speed operation this moment fully.Have only the rotating speed that removes to control fan according to the actual temperature change of computing machine, between rotation speed of the fan and environment temperature, set up funtcional relationship and just can reach best fall heat, noise reduction audio fruit.
The utility model content
The purpose of this utility model is to provide a kind of system fan rotating speed linear controller based on environment temperature, it utilizes running parameter that thermal sensing element provides according to variation of ambient temperature, provides control signal by control circuit, realization has reduced the noise of computing machine to greatest extent to the Linear Control of computer system rotation speed of the fan.
The purpose of this utility model is achieved in that
A kind of system fan rotating speed linear controller based on environment temperature, it comprises temperature acquisition element and rotating-speed control circuit; Control circuit comprises constant current feedback circuit and driver element; Input, the output terminal of constant current feedback circuit in the temperature acquisition element cross-over connection rotating-speed control circuit; The output termination driver element input end of constant current feedback circuit; The driver element output terminal is connected with the fan power supply input end; The constant current feedback circuit is made up of operational amplifier, electric capacity, divider resistance, and the temperature acquisition element is connected between the output terminal and reverse input end of operational amplifier; Electric capacity is connected across between the output terminal and reverse input end of operational amplifier; Divider resistance is connected with the positive input of operational amplifier; The temperature acquisition element is thermistor and the air inlet place that is arranged on the computer system fan.
The utility model adopts the constant current source controlling schemes, the two ends of thermal sensing element is connected across input, the output terminal of constant-current circuit operational amplifier; Utilize thermal sensing element, the change of environment temperature is converted into the variation of back level input amplifier voltage, thereby for the control of system fan rotating speed provides accurate control signal, really accomplish high precision sensitivity response, make the system fan rotating speed obtain Linear Control completely temperature variation.This device remains on the lower level system noise under the prerequisite that satisfies the computer system heat radiation cooling.
Description of drawings
Fig. 1 is the control flow chart of the utility model one embodiment;
Fig. 2 is the circuit theory diagrams of the utility model one embodiment;
Fig. 3 is the concrete application synoptic diagram of the utility model one embodiment;
Fig. 4 is the fan voltage of the utility model one embodiment and the curve map of temperature variation.
Embodiment:
Below, by a specific embodiment the utility model is described in further detail.
This embodiment is in the process of rotation speed of the fan being controlled according to temperature variation, and its main flow process as shown in Figure 1.Temperature detecting module is imported temperature signal into the constant current feedback circuit, and the change in voltage information that obtains outputs to driving circuit by signal amplifier, and driving circuit changes rotation speed of the fan, thereby reaches the control purpose.
As shown in Figure 2, the temperature acquisition element is a high precision thermosensitive resistor TR2, and this resistance inserts the output terminal of constant current feedback circuit operational amplifier IC7.Capacitor C is connected across output and the reverse input end 2 of operational amplifier IC7, utilizes the characteristic of capacitor charge and discharge maintenance pressure drop balance, the variation of thermistor TR2 is fed back to the reverse input end 2 of operational amplifier IC7.
Because operational amplifier has the characteristic of " empty disconnected ", make the resistance R 93 that flows through the positive and negative input end of concatenation operation amplifier IC7, the electric current of R95 can be approximated to be zero; And utilize the characteristic of operational amplifier " empty short " to make the low level of thermistor TR3 remain the dividing potential drop of R88, R90, adding the electric current that flows through capacitor C and go to zero because of charging, is exactly the electric current sum that flows through resistance R 94, R9 6 so flow through the electric current of thermistor TR3.
This constant current feedback circuit is adjusted automatically and remained to thermistor TR2 provides steady current.Therefore, when the resistance of thermistor TR2 varied with temperature and changes, the output end voltage of operational amplifier IC7 will change thereupon and be delivered to automatically in the next stage amplifying circuit.
In amplifying circuit, the voltage on the R86 is constant, is made as U5, and the voltage on the prime thermistor is made as U1, and the output voltage of this amplifying circuit is made as U0.According to above-mentioned " empty disconnected " notion, it is as follows to obtain corresponding relation:
(U1-U5)/R84＝(U5-U0)/R91
By above formula, U0 is set, make amplifier be operated in the linear amplification state.When linear change took place sampled voltage (being U1), by amplifying the transistor amplifier that drives the rear end, transistor amplifier then drove and changes the rotating speed of fan FAN, made the rotating speed of fan FAN obtain favorable linearity control.
As shown in Figure 3, be the practical application of control circuit provided by the utility model in computing machine.Fan 1 is arranged in the computer cabinet 2 among the figure, adopts the mode of putting that crouches, and heat is discharged by radiator-grid 3.Because adopted temperature linearity control, so, big fan can be adopted.Big fan is installed as updraft, outwards the mode of air draft.
Fig. 4 is the curve map of fan voltage and temperature variation.As seen from the figure, along with the variation of environment temperature, fan voltage shows favorable linearity and changes.Present embodiment utilizes temperature control, make computing machine under the duty of different temperatures, all can carry out good heat radiation, and make the noise of complete machine obtain reducing to greatest extent, simultaneously, the Linear Control of rotation speed of the fan also makes and obtains relative prolongation in serviceable life of fan.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (5)
1, a kind of system fan rotating speed linear controller based on environment temperature, it comprises temperature acquisition element and rotating-speed control circuit, it is characterized in that: control circuit comprises constant current feedback circuit and driver element; Input, the output terminal of constant current feedback circuit in the described temperature acquisition element cross-over connection rotating-speed control circuit; The output termination driver element input end of constant current feedback circuit; The driver element output terminal is connected with the fan power supply input end.
2, the system fan rotating speed linear controller based on environment temperature according to claim 1, it is characterized in that: described constant current feedback circuit is made up of operational amplifier, electric capacity, divider resistance, and the temperature acquisition element is connected between the output terminal and reverse input end of operational amplifier; Electric capacity is connected across between the output terminal and reverse input end of operational amplifier; Divider resistance is connected with the positive input of operational amplifier.
3, the system fan rotating speed linear controller based on environment temperature according to claim 1, it is characterized in that: described temperature acquisition element is arranged on the air inlet place of computer system fan.
4, according to claim 1 or 2 or 3 described system fan rotating speed linear controllers based on environment temperature, it is characterized in that: described temperature acquisition element is a thermistor.
5, the temperature linearity control circuit of rotation speed of the fan according to claim 1, it is characterized in that: described driver element comprises amplifying circuit, driving circuit, the input end of amplifying circuit is connected with the output terminal of constant current feedback circuit; The output terminal of amplifying circuit connects the input end of driving circuit; The output terminal of driving circuit is connected with the fan power supply input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02281863 CN2612982Y (en) | 2002-10-22 | 2002-10-22 | Linear controller for controlling rotation speed of system fan based on ambient temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02281863 CN2612982Y (en) | 2002-10-22 | 2002-10-22 | Linear controller for controlling rotation speed of system fan based on ambient temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2612982Y true CN2612982Y (en) | 2004-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02281863 Expired - Lifetime CN2612982Y (en) | 2002-10-22 | 2002-10-22 | Linear controller for controlling rotation speed of system fan based on ambient temperature |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101926078A (en) * | 2008-02-27 | 2010-12-22 | 奥斯兰姆有限公司 | Method of protection from over-temperature and corresponding arrangement |
| CN102200814A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Cabinet cooling device |
| CN102852843A (en) * | 2012-08-31 | 2013-01-02 | 北京机械设备研究所 | Temperature-controlled speed-regulating circuit for direct-current fan |
| CN103148008A (en) * | 2013-03-12 | 2013-06-12 | 滨州市技师学院 | Temperature control fan |
| CN103941828A (en) * | 2013-01-21 | 2014-07-23 | 扎尔曼技术株式会社 | Computer case |
| CN102022363B (en) * | 2009-09-18 | 2014-12-10 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN105975029A (en) * | 2016-06-13 | 2016-09-28 | 天津欧迈通信技术有限公司 | Distributed temperature control case radiating system |
-
2002
- 2002-10-22 CN CN 02281863 patent/CN2612982Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101926078A (en) * | 2008-02-27 | 2010-12-22 | 奥斯兰姆有限公司 | Method of protection from over-temperature and corresponding arrangement |
| US8514528B2 (en) | 2008-02-27 | 2013-08-20 | Osram Gesellschaft Mit Beschraenkter Haftung | Method of protection from over-temperature and corresponding arrangement |
| CN102022363B (en) * | 2009-09-18 | 2014-12-10 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN102200814A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Cabinet cooling device |
| CN102852843A (en) * | 2012-08-31 | 2013-01-02 | 北京机械设备研究所 | Temperature-controlled speed-regulating circuit for direct-current fan |
| CN102852843B (en) * | 2012-08-31 | 2014-10-08 | 北京机械设备研究所 | Temperature-controlled speed-regulating circuit for direct-current fan |
| CN103941828A (en) * | 2013-01-21 | 2014-07-23 | 扎尔曼技术株式会社 | Computer case |
| CN103148008A (en) * | 2013-03-12 | 2013-06-12 | 滨州市技师学院 | Temperature control fan |
| CN105975029A (en) * | 2016-06-13 | 2016-09-28 | 天津欧迈通信技术有限公司 | Distributed temperature control case radiating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121022 Granted publication date: 20040421 |