CN1896914A - Fan redundant system - Google Patents
Fan redundant system Download PDFInfo
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- CN1896914A CN1896914A CN 200510084211 CN200510084211A CN1896914A CN 1896914 A CN1896914 A CN 1896914A CN 200510084211 CN200510084211 CN 200510084211 CN 200510084211 A CN200510084211 A CN 200510084211A CN 1896914 A CN1896914 A CN 1896914A
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Abstract
A redundant system of fan comprises the first fan; the second fan and a system temperature or power collection-judgment circuit for detecting system temperature or power and for issuing judgment signal as starting up signal of the second fan to start up the second fan when system temperature or power is over preset threshold; the third fan and a judgment circuit of the third fan operation condition for judging whether any one of the first and second fans is fault or not and issuing a starting up signal of the third fan to start up the third fan when it is confirmed that one of the first and the second fans is fault.
Description
Technical field
The present invention relates to a kind of fan redundant system, particularly a kind ofly can reduce the system fan noise, improve fan serviceable life and guarantee the fan redundant system of system radiating performance.
Background technology
Along with the development that computer technology is maked rapid progress, the user is more and more higher to the requirement of computing power.Especially some special users, as the recreation fan, small-sized workstation user etc., large server are especially needless to say.For this reason, computing machine production firm is always in that constantly speed to introduce is faster, and the stronger type of performance is to satisfy the requirement that the user improves day by day.
The lifting of performance has brought the increase of power consumption, therefore will guarantee the computing machine operate as normal, and the requirement of heat dispersion is also just more and more higher.According to statistics, 8% computer glitch causes by heat radiation is not enough.In fact, the computer that has heat radiation hidden danger than everybody think more.The heat radiation meeting of total system directly influences the stability and the performance of computer, if things go on like this, causes more serious problem probably, and is very harmful to system.Even as if your computer looks that all are normal, that also is temporary transient, still exists danger.
What present most computing machine adopted all is the radiating mode of air-cooled (being the fan heat radiation), therefore, improve heat dispersion, except optimal design, just can only increase fan power and increase by two approach of fan number.And no matter adopting above-mentioned the sort of mode, the noise that powerful fan or windy fan work bring is unavoidable naturally, and also adopting so high radiating mode under the not high situation of system temperature is a kind of waste of the energy.In order to address this problem, a lot of computer makers have added the intelligent speed-regulating of fan in design.Adopt professional chip the system fan rotating speed to be carried out Based Intelligent Control, can ensure that like this heat dispersion can effectively reduce noise again according to the variation of system temperature.Unique defective is exactly the cost height, and this is not that very strict computer product is an all well and good selection for those middle-and high-end servers or to the cost control requirement certainly.But to low-end server, these price competition fiercenesses such as small-sized workstation or personal computer, concerning the very high product of cost requirement, expectation provides a kind of above function that can realize, the solution that cost is cheaper again.
Summary of the invention
The object of the present invention is to provide a kind of cost low, and can realize reducing system noise, reduce the fan redundant system of functions such as system power dissipation.
The invention provides a kind of fan redundant system, it comprises: at least one first fan, it is promptly started working after system's energising, at least one second fan, one system temperature and/or power collecting decision circuitry, be used for detection system temperature and/or system power, and when system temperature or system power surpass predetermined threshold, send system temperature or power collecting and judge that signal is as the second starting fan signal, start all second fan works, one three fan, with a three fan condition of work decision circuitry, whether any that is used for judging first fan and second fan breaks down, when any in first fan and second fan breaks down, send the three fan enabling signal, start described three fan and start working.
Aforesaid fan redundant system, it further comprises a plurality of fan work state acquisition circuit, links to each other with first fan or second fan respectively, is used to judge the duty of fan.
Aforesaid fan redundant system, wherein, the tach signal that this fan work state acquisition circuit is exported during with fan work is converted to high level, and the direct current signal of output was not converted to low level when fan was not worked.
Aforesaid fan redundant system, wherein, described three fan condition of work decision circuitry is a logical circuit, it is according to the output of the fan work state acquisition circuit that links to each other with first fan, the output of the fan work state acquisition circuit that links to each other with second fan, with the output of system temperature and/or power collecting decision circuitry, carry out logical operation, judge whether in first fan and second fan any breaks down.
Aforesaid fan redundant system, it further comprises a warning circuit, it receives the three fan enabling signal from three fan work decision circuitry, and gives the alarm.
Aforesaid fan redundant system, it further comprises a fan work state acquisition circuit that links to each other with three fan, is used to judge the duty of three fan.
Aforesaid fan redundant system, wherein, the tach signal that this fan work state acquisition circuit is exported during with fan work is converted to high level, and the direct current signal of output was not converted to low level when fan was not worked.
Aforesaid fan redundant system, it further comprises the fan work condition judgment circuit that one the 4th fan and links to each other with the 4th fan, the 4th fan work condition judgment circuit determines according to the output of three fan duty Acquisition Circuit and the output of system temperature and/or power collecting decision circuitry whether the 4th fan works, when judging that three fan work and system temperature or power surpass predetermined value, start the 4th fan and start working.
Control the state (work is not still worked) of time fan (second fan) and spare fans (three fan) according to the very simple circuit of fan redundant system utilization of the present invention.In this system; temperature and/or system power according to current system works are controlled time fan state (work is not still worked), control the state (work is not still worked) of spare fans according to the duty (normally still improper) of main fan (first fan) and time fan.Thereby the present invention can realize reaching the reduction system noise, reduces system power dissipation, and purpose such as reduce cost.
Description of drawings
Fig. 1 is the functional block diagram according to fan redundant system of the present invention.
Fig. 2 is the synoptic diagram according to the fan that uses in the fan redundant system of the present invention.
Fig. 3 is the working circuit diagram according to the system fan in the fan redundant system of the present invention 1.
Fig. 4 is the working circuit diagram according to the system fan in the fan redundant system of the present invention 2.
Fig. 5 is the circuit diagram according to the fan work state acquisition circuit in the fan redundant system of the present invention.
Fig. 6 is the working circuit diagram according to the system fan in the fan redundant system of the present invention 3.
Fig. 7 is the circuit diagram according to the fan warning circuit in the fan redundant system of the present invention.
Embodiment
As shown in Figure 1, comprise system fan 111 according to fan redundant system 1 of the present invention, system fan 212, system fan 313, fan power supply 14, temperature, power collecting decision circuitry 15, system fan 2 switch driving circuits 16, system fan 3 combination decision circuitry 17, system fan 1 duty Acquisition Circuit 21, system fan 2 duty Acquisition Circuit 18, system fan 3 switch driving circuits 19 and system fan warning circuit 20.Fan power supply 14 is used for to system fan 1,2 and 3 power supplies.System fan 111 is a main fan, and system fan 212 is from fan, and system fan 313 is the backup fan of system fan 111 and system fan 212.In this fan redundant system 1, system fan 111 is unconditionally promptly rotated after system powers at full speed.Temperature, power collecting decision circuitry 15 gathered the temperature and the power of current system, and when system temperature greater than T1 or system power during greater than P1, transmitting system fan 2 enabling signals start working system fan 212 to system fan 2 switch driving circuits 16.The duty of system fan 111 and system fan 212 is determined by system fan 1 duty Acquisition Circuit 21 and system fan 2 duty Acquisition Circuit 18 respectively.System fan 3 combination decision circuitry 17 are according to the output of temperature, power collecting decision circuitry 15, and the output of the output of system fan 1 duty Acquisition Circuit 21 and system fan 2 duty Acquisition Circuit 18 determines whether system fan 3 works.Wherein, the output of system fan 1 duty Acquisition Circuit 21 determines whether system fan 111 breaks down; The output acting in conjunction of the output of temperature, power collecting decision circuitry 15 and system fan 2 duty Acquisition Circuit 18 determines whether system fan 212 breaks down.When judging that system fan 111 or system fan 212 break down, system fan 3 combination decision circuitry 17 transmitting system fans 3 enabling signals are given system fan 3 switch driving circuits 19, start working with drive system fan 313.Simultaneously, system fan 3 combination decision circuitry 17 also send this signal to fan warning circuit 20, to give the alarm to the user.
In table 1, describe the relation between each system fan in this fan redundant system 1 in detail.
| System fan | Normal condition | Redundancy relationship | |||
| System temperature less than T1 and system power less than P1 | System temperature greater than T1 or system power greater than P1 | System temperature less than T1 and system power less than P1 | System temperature greater than T1 or system power greater than P1 | ||
| Fan 1 | ON | ON | OFF | OFF | ON |
| | Off | ON | Off | ON | |
| Fan | |||||
| 3 | Off | Off | ON | ON | ON |
Table 1, system fan state table
In this table, ON represents fan work, and off represents that fan do not work, and italics OFF represents the assumed conditions fault.T1 is a temperature range, and occurrence can be formulated by client oneself, can realize by revising circuit parameter.What T1 here stipulated is the system temperature whether decision systems fan 2 starts working.P1 is a system power value, by sampling CPU, and internal memory, the electric current of north and south bridge changes a threshold value that draws, and can realize by revising circuit parameter.What P1 here stipulated is the system power whether decision systems fan 2 starts working.
A, system fan 1 power in system and start working simultaneously, except that fault, can allow system fan 1 quit work without any condition.
The condition of b, system fan 2 work is: system temperature whether greater than T1 or system power greater than P1.After system powers on, if system power less than P1 and system temperature less than T1, system fan 2 is not worked; Therefore after system power was greater than T1, this illustrative system temperature will raise over time, and start-up system fan 2 improves the heat dispersion of system in advance; When owing to non-power factor affecting (as vent passages blocked etc.) causes system temperature greater than T1, system fan 2 also start working (except the fault).If consider the precision of the circuit of definite T1 in the present invention, then T1 represents a value range in the reality.At this moment, when system temperature equals point among the T1, system fan 2 can be made as indeterminate state (work or do not work).
C, system fan 3 are backups as system fan 1 and system fan 2.After system powered on, if system fan 1 and system fan 2 can both operate as normal, system fan 3 was not worked so; If during less than T1, system fan 1 breaks down (stall) at system temperature, or at system temperature during greater than T1, system fan 1 and system fan 2 have one to break down or all break down, and system fan 3 is started working.Starting fan simultaneously reports to the police.
The fan that is adopted according to fan redundant system 1 of the present invention is the 3 pin interfaces that have as shown in Figure 2, and operating voltage is the system fan of 1 2V direct current.Interface 1 is used to export rotation speed of the fan, and interface 2 is used for being connected with power supply, and interface 3 is used for ground connection.
Below, the operating circuit of describing system fan 1～3 in detail illustrates their embodiment separately.
As shown in Figure 3, it has described the working circuit diagram of system fan 1.We can find out from Fig. 3, and the 2nd pin (supply pin) of system fan 1 (CHSFAN1 among the figure) is by resistance R 321, and R323 directly is connected with the 12V power supply, and are middle without any on-off circuit.After system powered on, system fan 1 was promptly started working.Except that power down or fan failure, system fan 1 can not quit work.System fan 1 is exported fan rotating speed signals to system fan 1 duty Acquisition Circuit 21 by the 3rd pin in the course of the work simultaneously.
As shown in Figure 4, it has described the working circuit diagram of system fan 2.Circuit among Fig. 4 comprises system temperature shown in Figure 1 and system power collection decision circuitry 15 and system fan 2 switch driving circuits 16.
Resistance R 468, R469, R364, R464, capacitor C 111, C110 and comparer U21B have constituted system temperature jointly and have gathered decision circuitry.Wherein R469 is a thermistor, comes the sensory perceptual system variation of temperature by it, and shows as the variation of resistance own.Can be by adjusting resistance R 468, R364, the resistance of R464 is regulated the scope of T1.After parameter was decided, the variation of R469 resistance will inevitably cause the variation of the dividing potential drop ratio between it and the R468, and promptly the voltage on the 5th pin of U21B can raise along with the increase of R469 resistance, or reduces along with diminishing of R469 resistance.In case system temperature is higher than T1, the upset of U21B output level.
System power is gathered decision circuitry 41 and is adopted at 12V, is connected in series small precision resistance in 5V and the 3.3V electric power loop, and knows the variation of system power than the precision resistance both end voltage by amplification ratio.When system power during less than P1, decision circuitry is output as height, and system power is during greater than P1, and decision circuitry is output as low.
Carry out and logical operation with the output that logic gate 42 is gathered decision circuitry and system power collection decision circuitry 41 with system temperature.When system temperature greater than T1 or system power greater than P1, with fan 2 enabling signals of logic gate 42 output high level, output low level under other situation.With the output of logic gate 42 conducting of the triode Q57 in control system fan 2 ON-OFF control circuit on the one hand, export system fan 3 worker's set conditions combination decision circuitry 17 on the other hand to.
In the above example, described collection simultaneously and judged system temperature and system power, judged system temperature or only gather the judgement system power but also can only gather.
Resistance R 470, capacitor C 327, triode Q57, resistance R 355, resistance R 465, common construction system fan 2 switch driving circuits 16 of metal-oxide-semiconductor Q59.Resistance R 467 is a stand-by circuit, can omit in the side circuit.When fan 2 enabling signals are high level, triode Q57 conducting, metal-oxide-semiconductor Q59 ends, and system fan 2 (CHSFAN2) is not worked; When fan 2 enabling signals were low level, triode Q57 ended, metal-oxide-semiconductor Q59 conducting, system fan 2 work.Simultaneously in order to prevent that thereby the upset that system temperature can make comparer U21B not stop from causing system fan 2 vibrations when T1 fluctuates up and down, can in design, increase the appearance value of capacitor C 111 wittingly, make lag behind a little variation with system temperature of the response of entry condition output, prevent vibration.Simultaneously, system fan 2 exports fan rotating speed signals to fan 2 duty Acquisition Circuit 18 by the 3rd pin.
As shown in Figure 5, it has described the circuit diagram of system fan 1 duty Acquisition Circuit 21 and system fan 2 duty Acquisition Circuit 18.The circuit structure of system fan 1 duty Acquisition Circuit 21 and system fan 2 duty Acquisition Circuit 18 is identical.
When the system fan operate as normal, system fan the 3rd pin output fan rotating speed signals be the square wave of certain frequency, square wave frequency is according to the difference of rotation speed of the fan and difference.And when not work or hinder for some reason and when quitting work, the fan rotating speed signals of system fan the 3rd pin output is constant high level or low level, rather than pulsating wave of fan.As shown in Figure 5, when the system fan operate as normal, the tach signal of this system fan output is a square wave, this output square wave can charge to capacitor C 460 by capacitor C 121 and diode D20, can obtain a high level at output terminal and represent that system fan is working properly, promptly Shu Chu fan work status signal is a high level.When system fan is not worked or barrier quits work for some reason, the fan rotating speed signals of output is constant high level or low level, and this signal can't pass through capacitor C 121, therefore also can't be to capacitor C 460 chargings, the output terminal level is low, the not work of expression system fan.
The operating circuit of system fan 3 (CHSFAN3) has been described as shown in Figure 6.In Fig. 6, or door U23A and Sheffer stroke gate U15D have formed the system fan 3 combination decision circuitry 17 among Fig. 1 jointly.These system fan 3 combination decision circuitry 17 are to design according to redundancy relationship listed in the table 1.The output of this decision circuitry 17 is the switch driving circuit 19 of control system fan 3 on the one hand, exports fan warning circuit 20 on the other hand to.
Below, with reference to the described redundancy relationship of table 1, analyze the principle of work of circuit shown in Figure 6.
(being all non-fault of system fan 1 and system fan 2) under normal operation, when temperature less than T1 and system power during less than P1, comparer U21B is output as high level, system power collection judgement is output as high level, so fan 2 enabling signals are high level, or a door U23A is output as high level, and simultaneously fan 1 working state signal is a high level, so Sheffer stroke gate U15D is output as low level; When temperature during greater than T1, comparer U21B is output as low level, system fan 2 enabling signals are low level, system fan 2 startup work, fan 2 working state signals are high level, then or a door U23A be output as high level, simultaneously fan 1 working state signal is a high level, so Sheffer stroke gate U15D is output as low level; When system power during greater than P1, system power is gathered decision circuitry and is output as low level, system fan 2 enabling signals are low level, system fan 2 startup work, fan 2 working state signals are high level, then or a door U23A be output as high level, simultaneously fan 1 duty is output as high level, so Sheffer stroke gate U15D is output as low level.
Under non-normal condition (system fan 1 or system fan 2 have fault), when system fan 1 has fault, then fan 1 working state signal is a low level, and Sheffer stroke gate U15D is output as high level so; System fan 2 has fault if system fan 1 is working properly, when temperature was lower than T1 and system power less than P1, fan 2 enabling signals were high level, or a door U23A is output as high level, fan 1 working state signal is a high level simultaneously, so Sheffer stroke gate U15D is output as low level; When temperature is higher than T1 or system power greater than P1, the system temperature judgement is output as low level, and system fan 2 hinders for some reason can't normally start work, and fan 2 working state signals are low level, then or the door U23A be output as low level, so Sheffer stroke gate U15D is output as low level.
In Fig. 6, resistance R 75, triode Q65, resistance R 74, the common composition of resistance R 263 and metal-oxide-semiconductor Q66 system fan 3 switch driving circuits 19 shown in Figure 1.Resistance R 466 is a stand-by circuit, can not install during actual the use.When Sheffer stroke gate U15D was output as low level, triode Q65 ended, and metal-oxide-semiconductor Q66 also ends, and system fan 3 is not worked; When Sheffer stroke gate U15D is output as high level, triode Q65 conducting, also conducting of metal-oxide-semiconductor Q66, system fan 3 begins startup work.
The circuit structure diagram of fan failure warning circuit 20 has been described as shown in Figure 7.It comprises alarm element 71 and resistance 71.In the present invention, system fan 3 is the redundancy backups as system fan 1 and system fan 2, if system fan 3 begins startup work, promptly illustrative system fan 1 or system fan 2 have fault to produce.So, in the design with the enabling signal (being the output of Sheffer stroke gate U15D) of system fan 3 control signal as warning circuit.Alarm element 71 can adopt light emitting diode, hummer or other mode.
Above though the fan redundant system 1 that comprises a system fan 1, a system fan 2 and a system fan 3 has been described, the present invention is not limited to this.The present invention equally also can comprise a plurality of system fan 1 and/or a plurality of system fan 2.The work that after system energising, will begin in a minute of all system fan 1.Whether utilize system temperature, power collecting decision circuitry 15 to control all system fan 2 works.Utilization is similar to the circuit structure of describing among Fig. 1, determines whether 3 work of start-up system fan by judging whether all system fan 1 and system fan 2 break down.
In addition, a system fan that links to each other with three fan 3 duty Acquisition Circuit (its structure as shown in Figure 5) can also be set further in fan redundant system of the present invention, a system fan 4, and a system fan 4 combination decision circuitry.The output of the output of these system fan 4 combination decision circuitry receiving system fans 3 duty Acquisition Circuit and system temperature, power collecting decision circuitry 15, and when judging that system fan 3 work and system temperature, start identical fans 4 and start working during greater than P1 greater than T1 or system temperature.
According to fan redundant system of the present invention, can start in advance by the variation of detection system power and improve heat dispersion from fan (system fan 2), also can determine whether starting simultaneously, really realize the intelligent management of fan by the detection system temperature variation from fan; Can effectively reduce the system fan noise, reduce system power dissipation, improve fan serviceable life; Can whether start spare fans (system fan 3) according to current each conditional decision of system at main fan (system fan 1) with when fan breaks down.In addition, the user can know the working condition of current system fan very intuitively by warning circuit 20, breaks down and can in time change system fan, reduces the possibility that the system failure takes place.In addition, circuit is very simple, is increasing the redundancy that has realized system fan under the condition of cost hardly.
Claims (8)
1. fan redundant system, it comprises:
At least one first fan, it is promptly started working after system's energising,
At least one second fan,
One system temperature and/or power collecting decision circuitry, be used for detection system temperature and/or system power, and when system temperature or system power surpass predetermined threshold, send system temperature or power collecting and judge that signal is as the second starting fan signal, start all second fan works
One three fan and
One three fan condition of work decision circuitry, whether any that is used for judging first fan and second fan breaks down, when any in first fan and second fan breaks down, send the three fan enabling signal, start described three fan and start working.
2. fan redundant system as claimed in claim 1, it further comprises a plurality of fan work state acquisition circuit, links to each other with first fan or second fan respectively, is used to judge the duty of fan.
3. fan redundant system as claimed in claim 2, wherein,
The tach signal that this fan work state acquisition circuit is exported during with fan work is converted to high level, and the direct current signal of output was not converted to low level when fan was not worked.
4. fan redundant system as claimed in claim 3, wherein,
Described three fan condition of work decision circuitry is a logical circuit, it is according to the output of the fan work state acquisition circuit that links to each other with first fan, the output of the fan work state acquisition circuit that links to each other with second fan, output with system temperature and/or power collecting decision circuitry, carry out logical operation, judge whether in first fan and second fan any breaks down.
5. as each described fan redundant system of claim 1 to 4, it further comprises a warning circuit, and it receives the three fan enabling signal from three fan work decision circuitry, and gives the alarm.
6. fan redundant system as claimed in claim 1, it further comprises a three fan duty Acquisition Circuit that links to each other with three fan, is used to judge the duty of three fan.
7. fan redundant system as claimed in claim 6, wherein,
The tach signal that this three fan duty Acquisition Circuit is exported during with fan work is converted to high level, and the direct current signal of output was not converted to low level when fan was not worked.
8. fan redundant system as claimed in claim 6, it further comprises the fan work condition judgment circuit that one the 4th fan and links to each other with the 4th fan, the 4th fan work condition judgment circuit determines according to the output of three fan duty Acquisition Circuit and the output of system temperature and/or power collecting decision circuitry whether the 4th fan works, when judging that three fan work and system temperature or power surpass predetermined value, start the 4th fan and start working.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510084211A CN100590570C (en) | 2005-07-15 | 2005-07-15 | Fan redundant system |
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| CN200510084211A CN100590570C (en) | 2005-07-15 | 2005-07-15 | Fan redundant system |
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| CN1896914A true CN1896914A (en) | 2007-01-17 |
| CN100590570C CN100590570C (en) | 2010-02-17 |
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| CN200510084211A Expired - Fee Related CN100590570C (en) | 2005-07-15 | 2005-07-15 | Fan redundant system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| CN102213987A (en) * | 2010-04-06 | 2011-10-12 | 英业达股份有限公司 | Server system and fan detection method thereof |
| CN102348365A (en) * | 2010-08-03 | 2012-02-08 | 联想(北京)有限公司 | Method and device for regulating temperature of cabinet and cabinet |
| CN101673088B (en) * | 2008-09-12 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | Electronic equipment with redundancy control capability of fan |
| CN104747483A (en) * | 2013-12-31 | 2015-07-01 | 鸿富锦精密电子(天津)有限公司 | Fan control system |
| CN104777886A (en) * | 2008-02-15 | 2015-07-15 | 惠普开发有限公司 | Method for changing power states of data processing devices in order to meet redundancy rule |
| CN107918376A (en) * | 2017-10-10 | 2018-04-17 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of control circuit of cooling fan, method and device |
| CN109491480A (en) * | 2018-12-27 | 2019-03-19 | 武汉西山艺创文化有限公司 | A kind of server radiating mechanism and heat dissipating method based on vertical turbine fan |
| CN109491479A (en) * | 2018-12-27 | 2019-03-19 | 武汉西山艺创文化有限公司 | A kind of computer case radiation mechanism and heat dissipating method based on vertical turbine fan |
| CN114268077A (en) * | 2021-11-26 | 2022-04-01 | 广州芯德通信科技股份有限公司 | OLT equipment temperature overheating protection circuit and method |
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- 2005-07-15 CN CN200510084211A patent/CN100590570C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777886A (en) * | 2008-02-15 | 2015-07-15 | 惠普开发有限公司 | Method for changing power states of data processing devices in order to meet redundancy rule |
| CN101673088B (en) * | 2008-09-12 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | Electronic equipment with redundancy control capability of fan |
| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| CN102213987B (en) * | 2010-04-06 | 2015-06-10 | 英业达股份有限公司 | Server system and fan detection method thereof |
| CN102213987A (en) * | 2010-04-06 | 2011-10-12 | 英业达股份有限公司 | Server system and fan detection method thereof |
| CN102348365A (en) * | 2010-08-03 | 2012-02-08 | 联想(北京)有限公司 | Method and device for regulating temperature of cabinet and cabinet |
| CN104747483A (en) * | 2013-12-31 | 2015-07-01 | 鸿富锦精密电子(天津)有限公司 | Fan control system |
| CN104747483B (en) * | 2013-12-31 | 2016-11-23 | 江苏道康发电机组有限公司 | Fan control system |
| CN107918376A (en) * | 2017-10-10 | 2018-04-17 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of control circuit of cooling fan, method and device |
| CN109491480A (en) * | 2018-12-27 | 2019-03-19 | 武汉西山艺创文化有限公司 | A kind of server radiating mechanism and heat dissipating method based on vertical turbine fan |
| CN109491479A (en) * | 2018-12-27 | 2019-03-19 | 武汉西山艺创文化有限公司 | A kind of computer case radiation mechanism and heat dissipating method based on vertical turbine fan |
| CN109491480B (en) * | 2018-12-27 | 2022-02-08 | 武汉西山艺创文化有限公司 | Server heat dissipation mechanism and heat dissipation method based on vertical turbofan |
| CN114268077A (en) * | 2021-11-26 | 2022-04-01 | 广州芯德通信科技股份有限公司 | OLT equipment temperature overheating protection circuit and method |
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| CN100590570C (en) | 2010-02-17 |
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