CN102955534A - Fan control system and fan control method - Google Patents
Fan control system and fan control method Download PDFInfo
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- CN102955534A CN102955534A CN 201110241304 CN201110241304A CN102955534A CN 102955534 A CN102955534 A CN 102955534A CN 201110241304 CN201110241304 CN 201110241304 CN 201110241304 A CN201110241304 A CN 201110241304A CN 102955534 A CN102955534 A CN 102955534A
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Abstract
A fan control method is used for controlling a first fan and a second fan, and includes the steps: a control unit acquires working information of the first fan and the second fan so as to obtain working strength of the first fan and the second fan, and the control unit is used for comparing the relation of the working strength of the first fan with that of the second fan so as to regulate the rotating speed of the second fan correspondingly. By the fan control method, hot-air reflowing of a computer is avoided by means of regulation of the rotating speed of the first fan. The invention further provides a fan control system.
Description
Technical field
The present invention relates to a kind of fan control system and method.
Background technology
In the existing host computer, for satisfying the radiating requirements of system, main frame production firm all can arrange a plurality of fans and come respectively various piece in the main frame to be dispelled the heat.For example, in host design, common way is a power supply fan to be set and a system fan is come respectively power supply and the mainboard that is arranged in this main frame to be dispelled the heat.Yet, the working strength of each fan is different, the ratio that is the size of each fan actual speed and its maximum (top) speed size is different, the hot-air that so may cause the large fan of the working strength fan that working strength is little to discharge sucks, thereby produced the phenomenon of hot air reflow, and then affected the overall performance of main frame.Such as the working strength of and power supply fan large when the working strength of system fan hour, might cause this power supply fan in time the hot-air of power generation to be discharged, the hot-air of this power generation is sucked on the mainboard by system fan on the contrary, has so produced the phenomenon of hot air reflow.
Summary of the invention
In view of above content, be necessary to provide a kind of fan control system and method for avoiding producing the hot air reflow phenomenon.
A kind of control method for fan is used for first and second fan of control, and this control method for fan comprises the steps:
Obtain respectively the job information of this first and second fan by a control module to obtain the working strength of this first and second fan, wherein the working strength of this first and second fan is the ratio of the maximum (top) speed of the current rotating speed of this first and second fan and its support;
The size of the working strength of this first fan and the second fan relatively;
When the working strength of this first fan during greater than the working strength of this second fan, relatively whether the difference of this first fan and the second fan work intensity is not more than one first preset value;
When the working strength of the second fan was not less than the working strength of this first fan, relatively whether the difference of this second fan and the first fan work intensity was not more than this first preset value;
When the difference of the first fan and the second fan work intensity during greater than this first preset value, this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to, and returns step " the relatively size of the working strength of this first fan and the second fan ";
When the difference of the second fan and the first fan work intensity during greater than this first preset value, this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to, and returns step " the relatively size of the working strength of this first fan and the second fan ".
A kind of fan control system is used for control one first fan and one second fan, and this fan control system comprises:
One control module, this control module comprises that one first burst transmissions pin, one second burst transmissions pin, a First Speed receive pin and a second speed receives pin, this first and second burst transmissions pin links to each other with first and second fan respectively, control first and second fan with correspondence, this first and second speed receives pin and links to each other with first and second fan respectively, receives the rotating speed of first and second fan with correspondence;
This control module obtains respectively the job information of this first and second fan to obtain the working strength of this first and second fan, and wherein the working strength of this first and second fan is the ratio of the maximum (top) speed of the current rotating speed of this first and second fan and its support;
When working strength of this first fan during greater than the working strength of this second fan, relatively whether the difference of this first fan and the second fan work intensity is not more than one first preset value;
When the working strength of the second fan was not less than the working strength of this first fan, relatively whether the difference of this second fan and the first fan work intensity was not more than this first preset value;
When the difference of the first fan and the second fan work intensity during greater than this first preset value, this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to;
When the difference of the second fan and the first fan work intensity during greater than this first preset value, this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to.
A kind of fan control system, be used for control one first fan and one second fan, this fan control system comprises a control module, this control module comprises one first burst transmissions pin and one second burst transmissions pin, this first and second burst transmissions pin links to each other with first and second fan respectively, control first and second fan with the output pulse control signal, this first and second speed receives pin and links to each other with first and second fan respectively;
This control module also is used for obtaining the size of the dutycycle of the pulse signal that this first and second fan receives;
During the dutycycle of the pulse signal that the size of the dutycycle of the pulse signal that receives when this first fan receives greater than this second fan big or small, relatively whether the difference of the size of the dutycycle of the pulse signal of this first fan and the second fan reception is not more than one first preset value;
When the size of the dutycycle of the pulse signal that receives when the second fan was not less than dutycycle big or small of the pulse signal that this first fan receives, relatively whether the difference of the size of the dutycycle of the pulse signal of this second fan and the first fan reception was not more than this first preset value;
The difference of the size of the dutycycle of the pulse signal that receives when the first fan and the second fan is during greater than this first preset value, and this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to;
The difference of the size of the dutycycle of the pulse signal that receives when the second fan and the first fan is during greater than this first preset value, and this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to.
Said fans control system and method are regulated the rotating speed of this first fan by the size of this first fan and the second fan work intensity relatively, avoided producing in this computer the phenomenon of hot air reflow, and then have improved the stability of computer system.
Description of drawings
Fig. 1 is the structural drawing of the better embodiment of fan control system of the present invention.
Fig. 2 is the process flow diagram of the better embodiment of control method for fan of the present invention.
The main element symbol description
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10 |
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20 |
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30 |
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40 |
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50 |
Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 1, fan control system of the present invention is used for preventing that the computer from producing the phenomenon of hot air reflow, and the better embodiment of this fan control system comprises a control module 10, a power supply 40, a mainboard 50, power supply fan 20 and the system fan 30 for reducing these mainboard 50 working temperatures for reducing these power supply 40 working temperatures.This control module 10 comprises that first, second burst transmissions pin PWM1, PWM2 and first, second speed receive pin TACH1, TACH2.In the present embodiment, this control module 10 can be a BIOS(Basic Input/Output System, Basic Input or Output System (BIOS)) or a BMC(Baseboard Management Control, baseboard management controller).
Behind the booting computer, this control module 10 is controlled this power supply fan 20 and system fan 30 by its first and second pulse output pin PWM1 and PWM2 output pulse signal respectively, so that the hot-air that this power supply fan 20 and system fan 30 can be respectively produce this power supply 40 and mainboard 50 is discharged this computer in time.Simultaneously, this control module 10 also obtains respectively the size of this power supply fan 20 and system fan 30 rotating speeds in real time by its first and second speed transmission pin TACH1 and TACH2.
Please refer to Fig. 2, the better embodiment of control method for fan of the present invention may further comprise the steps:
Step S1, this control module 10 obtains respectively the job information of this power supply fan 20 and system fan 30.In the present embodiment, the job information of this power supply fan 20 and system fan 30 comprises the size of the dutycycle of the rotating speed of this power supply fan 20 and system fan 30 and the pulse signal that this control module 10 exports respectively this power supply fan 20 and system fan 30 to.Wherein this control module 10 can receive the rotating speed that pin TACH1 and TACH2 obtain respectively this power supply fan 20 and system fan 30 by its first and second speed, and this control module 10 also obtains the size of dutycycle that its first, second pulse output pin PWM1 and PWM2 export respectively the pulse signal of this power supply fan 20 and system fan 30 to simultaneously.
Step S2, this control module 10 be the size of this system fan 30 and the working strength of power supply fan 20 relatively; If the working strength of this system fan 30 greater than the working strength of this power supply fan 20, enters step S3; Otherwise, enter step S4.The below will make an explanation to the definition of fan work intensity.
Fan working strength of the present invention is defined as the size of the current rotating speed of fan and the ratio between its support maximum (top) speed.After computer design was finished, each performance parameter of each fan was all definite in its main frame, the maximum (top) speed of supporting such as each fan etc.In addition, according to the principle of work of fan as can be known, when the operate power of fan is no more than its rated power, its row of wind of fan that power is larger is also larger, the effect of heat radiation is also better, the power of fan and the rotating speed of fan are contacted directly again together, that is to say that the rotating speed of fan is higher, and the exhaust air rate of fan is also just larger.That is for same fan, its working strength is larger, and its exhaust air rate is also just larger.
Step S3 judges whether this system fan 30 and the difference of power supply fan 20 working strengths are not more than one first preset value, if the difference of the working strength of this system fan 30 and power supply fan 20 enters step S5 greater than this first preset value; Otherwise, process ends.The below makes an explanation to the comparability of fan work intensity.
For the power supply fan 20 that is specifically related among the present invention and system fan 30, the temperature variation when this control module 10 is worked with mainboard 50 according to this power supply 40 is come the velocity of rotation of this power supply fan 20 of real-time monitoring and system fan 30.For example, when high the and temperature that power supply 40 work produce of the temperature that produces when mainboard 50 work are low, 10 rotating speeds that can increase this system fan 30 of this control module, namely increase the working strength of this system fan 30, also can reduce simultaneously the rotating speed of this power supply fan 20, that is reduce the working strength of this power supply fan 20, so so that the exhaust air rate of this system fan 30 is large, and the exhaust air rate less of power supply fan 20.Therefore, if when the rotating speed of this system fan 30 during greater than this power supply fan the 20 one the first preset values, this power supply fan 20 is expelled to outside the main frame because of the hot-air that its rotating speed little (working strength is little) can't in time produce this power supply 40, the hot-air that this power supply 40 produces is sucked on the mainboard by this system fan 30 on the contrary, so shows the phenomenon that has produced hot air reflow in the main frame.Wherein, the concrete large I of this first preset value is determined according to each performance parameter of determined power supply fan 20 when the computer design and system fan 30.For example, in the computer of a complete design, suppose that the size of this first preset value is " 0.1 ", that is, when the difference of the working strength of system fan 30 and power supply fan 20 is not more than this first preset value, can recognize in order that do not produce the phenomenon of hot air reflow in this main frame; Otherwise what can judge is to have produced the phenomenon of hot air reflow in this main frame.
Step S4 judges whether this power supply fan 20 and the difference of system fan 30 working strengths are not more than this first preset value, if the difference of this power supply fan 20 and system fan 30 working strengths enters step S6 greater than this first preset value; Otherwise process ends.
In main frame, along with the variation of this power supply 40 with mainboard 50 working temperatures, this control module 10 is the rotating speed of this power supply fan of real-time monitoring 20 and system fan 30 also, so may cause the working strength of this power supply fan 20 large, and the working strength of this system fan 30 is little, so that the hot-air that this system fan 30 can't in time produce this mainboard 50 is got rid of outside the main frame, the hot-air that this mainboard 50 produces is sucked by this power supply fan 20 on the contrary, thereby so that has produced the phenomenon of hot air reflow in the main frame.For example, in the computer of a complete design, suppose that the size of this first preset value is " 0.1 ", that is, when the difference of the working strength of power supply fan 20 and system fan 30 is not more than this first preset value, can recognize in order that do not produce the phenomenon of hot air reflow in this main frame; Otherwise what can judge is to have produced the phenomenon of hot air reflow in this main frame.Therefore, the present invention need judge also whether this power supply fan 20 and the difference of the working strength of system fan 30 are not more than this first preset value.
Step S5, this control module 10 increases these power supply fan 20 working strengths in one second preset value, and returns step S2.
When this control module 10 judges that these system fan 30 working strengths are greater than these power supply fan 20 working strengths during in this first preset value, the phenomenon that so shows hot air reflow in the main frame is that the hot-air that this power supply 40 produces is sucked on the mainboard 50 by this system fan 30 on the contrary because the hot-air that this power supply fan 20 can't produce this power supply 40 is in time discharged.Therefore, this control module 10 increases by one second preset value on the existing basis that exports the dutycycle size of these power supply fan 20 pulse signals to, export the size of dutycycle of the pulse signal of this power supply fan 20 with increase to, thereby reach the purpose of this power supply fan 20 of balance and system fan 30 working strength Relations Amongs.For example, if the working strength of this system fan 30 is " 0.8 " under the current state, the working strength of this power supply fan 20 is " 0.6 ", at this moment, because of the working strength of this system fan 30 greater than this power supply fan 20 in the first preset value (this first preset value is " 0.1 "), therefore this control module 10 increases by one second preset value on the existing basis that exports the dutycycle size of these power supply fan 20 pulse signals to, be " 0.1 " such as this second preset value, so so that the working strength of this power supply fan 20 is " 0.7 ", so that the difference of this system fan 30 and power supply fan 20 working strengths is not more than this first preset value, so reached the purpose of this power supply fan 20 of balance with system fan 30 working strength Relations Amongs.Certainly, this second preset value also can be " 0.2 ".Afterwards, return step S2, the relation between the working strength of continuation this power supply fan 20 of judgement and system fan 30.
Step S6, this control module 10 reduces these power supply fan 20 working strengths in this second preset value, and returns step S2.
When this control module 10 judges that these system fan 30 working strengths are less than these power supply fan 20 working strengths during in this first preset value, the phenomenon that so shows hot air reflow in the main frame is that the hot-air that this mainboard 50 produces is sucked into this power supply 40 by power supply fan 20 on the contrary because the hot-air that this system fan 30 can't produce this mainboard 50 is in time discharged.Therefore, this control module 10 deducts this second preset value on the existing basis that exports the dutycycle size of these power supply fan 20 pulse signals to, export the size of dutycycle of the pulse signal of this power supply fan 20 with minimizing to, thereby reach the working strength purpose of this power supply fan 20 of balance and system fan 30.For example, the working strength of this power supply fan 20 is " 0.8 " under the current state, and the working strength of this system fan 30 is " 0.6 ".At this moment, because of the working strength of this power supply fan 20 greater than this system fan 30 in this first preset value (this first preset value is " 0.1 "), therefore this control module 10 reduces this second preset value on the basis of the dutycycle size of existing these power supply fan 20 pulse signals of output valve, be " 0.1 " such as this second preset value, so so that the working strength of this power supply fan 20 is " 0.7 ", so that the difference of this power supply fan 20 and system fan 30 working strengths is not more than this first preset value, this has reached the purpose of this power supply fan 20 of balance with system fan 30 working strength Relations Amongs.Certainly, this second preset value also can be " 0.2 ".Afterwards, return step S2, the relation between the working strength of continuation this power supply fan 20 of judgement and system fan 30.
Certainly, in other embodiments, the working strength of this power supply fan 20 and system fan 30 size of dutycycle that can also transfer to by obtaining first and second burst transmissions pin PWM1 and PWM2 the pulse signal of this power supply fan 20 and system fan 30 is determined.Such as, suppose when the size of dutycycle that this control module 10 transfers to the pulse signal of this power supply fan 20 and system fan 30 is " 1 ", illustrated that namely this power supply fan 20 and system fan 30 are respectively with its maximum rotary speed working, the working strength that at this moment, can show this power supply fan 20 and system fan 30 is " 1 "; When this control module 10 transfers to the size of dutycycle of pulse signal of this power supply fan 20 and system fan 30 when " 0.5 ", illustrated that namely this power supply fan 20 and system fan 30 are all with half rotary speed working of the maximum (top) speed of its support, the working strength that at this moment, can show this power supply fan 20 and system fan 30 is " 0.5 ".So, can determine by exporting this power supply fan 20 and the size of the dutycycle of the pulse signal of system fan 30 to the working strength of each fan.
Said fans control system and method have been avoided the phenomenon of the hot air reflow that produces because of the imbalance between the working strength of this power supply fan 20 and system fan 30 by the rotating speed of regulating this power supply fan 20, thereby have improved the stability of computer system.
Claims (6)
1. a control method for fan is used for first and second fan of control, and this control method for fan comprises the steps:
Obtain respectively the job information of this first and second fan by a control module to obtain the working strength of this first and second fan, wherein the working strength of this first and second fan is the ratio of the maximum (top) speed of the current rotating speed of this first and second fan and its support;
The size of the working strength of this first fan and the second fan relatively;
When the working strength of this first fan during greater than the working strength of this second fan, relatively whether the difference of this first fan and the second fan work intensity is not more than one first preset value;
When the working strength of the second fan was not less than the working strength of this first fan, relatively whether the difference of this second fan and the first fan work intensity was not more than this first preset value;
When the difference of the first fan and the second fan work intensity during greater than this first preset value, this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to, and returns step " the relatively size of the working strength of this first fan and the second fan ";
When the difference of the second fan and the first fan work intensity during greater than this first preset value, this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to, and returns step " the relatively size of the working strength of this first fan and the second fan ".
2. control method for fan as claimed in claim 1, it is characterized in that: the job information of this first and second fan comprises the size of this first and second rotation speed of the fan.
3. control method for fan as claimed in claim 1 is characterized in that: the job information of this first and second fan comprises that this control module exports respectively the size of dutycycle of the pulse signal of this first and second fan to.
4. control method for fan as claimed in claim 1, it is characterized in that: this control module is a Basic Input or Output System (BIOS) or a baseboard management controller.
5. a fan control system is used for control one first fan and one second fan, and this fan control system comprises:
One control module, this control module comprises that one first burst transmissions pin, one second burst transmissions pin, a First Speed receive pin and a second speed receives pin, this first and second burst transmissions pin links to each other with first and second fan respectively, control first and second fan with correspondence, this first and second speed receives pin and links to each other with first and second fan respectively, receives the rotating speed of first and second fan with correspondence;
This control module obtains respectively the job information of this first and second fan to obtain the working strength of this first and second fan, and wherein the working strength of this first and second fan is the ratio of the maximum (top) speed of the current rotating speed of this first and second fan and its support;
When working strength of this first fan during greater than the working strength of this second fan, relatively whether the difference of this first fan and the second fan work intensity is not more than one first preset value;
When the working strength of the second fan was not less than the working strength of this first fan, relatively whether the difference of this second fan and the first fan work intensity was not more than this first preset value;
When the difference of the first fan and the second fan work intensity during greater than this first preset value, this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to;
When the difference of the second fan and the first fan work intensity during greater than this first preset value, this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to.
6. fan control system, be used for control one first fan and one second fan, this fan control system comprises a control module, this control module comprises one first burst transmissions pin and one second burst transmissions pin, this first and second burst transmissions pin links to each other with first and second fan respectively, control first and second fan with the output pulse control signal, this first and second speed receives pin and links to each other with first and second fan respectively;
This control module also is used for obtaining the size of the dutycycle of the pulse signal that this first and second fan receives;
During the dutycycle of the pulse signal that the size of the dutycycle of the pulse signal that receives when this first fan receives greater than this second fan big or small, relatively whether the difference of the size of the dutycycle of the pulse signal of this first fan and the second fan reception is not more than one first preset value;
When the size of the dutycycle of the pulse signal that receives when the second fan was not less than dutycycle big or small of the pulse signal that this first fan receives, relatively whether the difference of the size of the dutycycle of the pulse signal of this second fan and the first fan reception was not more than this first preset value;
The difference of the size of the dutycycle of the pulse signal that receives when the first fan and the second fan is during greater than this first preset value, and this control module increases by one second preset value on the current basis that exports the dutycycle of this second fan pulse signal to;
The difference of the size of the dutycycle of the pulse signal that receives when the second fan and the first fan is during greater than this first preset value, and this control module reduces this second preset value on the basis of the dutycycle that exports this second fan pulse signal to.
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| CN 201110241304 CN102955534A (en) | 2011-08-22 | 2011-08-22 | Fan control system and fan control method |
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| CN 201110241304 CN102955534A (en) | 2011-08-22 | 2011-08-22 | Fan control system and fan control method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104675736A (en) * | 2013-11-28 | 2015-06-03 | 英业达科技有限公司 | Control circuit for controlling rotation speed of fan by outputting square wave signal |
| CN104797118A (en) * | 2014-01-16 | 2015-07-22 | 纬创资通股份有限公司 | Secondary fan system, server and secondary fan system control method |
| CN106292962A (en) * | 2016-08-19 | 2017-01-04 | 联想(北京)有限公司 | The control method of heat abstractor and control system, rack server |
| CN106681889A (en) * | 2016-12-01 | 2017-05-17 | 重庆诚硕科技有限公司 | Warning method for office computers |
| CN108990391A (en) * | 2018-09-05 | 2018-12-11 | 郑州云海信息技术有限公司 | A kind of container data center modularization indirect evaporating-cooling system and method |
| CN109271000A (en) * | 2017-07-17 | 2019-01-25 | 沃尔缇夫能源系统公司 | The control method of power supply fan, apparatus and system |
| CN109739323A (en) * | 2018-12-26 | 2019-05-10 | 郑州云海信息技术有限公司 | A kind of server power block fan rotational frequency control method and device |
| CN110099542A (en) * | 2018-01-30 | 2019-08-06 | 广达电脑股份有限公司 | Ensure the method for power supply device normal operation in electronic equipment |
| CN112324691A (en) * | 2020-07-10 | 2021-02-05 | 北京京东尚科信息技术有限公司 | Control method and device for airflow driving device, power supply device and electronic equipment |
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- 2011-08-22 CN CN 201110241304 patent/CN102955534A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675736A (en) * | 2013-11-28 | 2015-06-03 | 英业达科技有限公司 | Control circuit for controlling rotation speed of fan by outputting square wave signal |
| CN104797118A (en) * | 2014-01-16 | 2015-07-22 | 纬创资通股份有限公司 | Secondary fan system, server and secondary fan system control method |
| CN106292962A (en) * | 2016-08-19 | 2017-01-04 | 联想(北京)有限公司 | The control method of heat abstractor and control system, rack server |
| CN106292962B (en) * | 2016-08-19 | 2019-07-26 | 联想(北京)有限公司 | The control method and control system of radiator, rack server |
| CN106681889A (en) * | 2016-12-01 | 2017-05-17 | 重庆诚硕科技有限公司 | Warning method for office computers |
| CN109271000A (en) * | 2017-07-17 | 2019-01-25 | 沃尔缇夫能源系统公司 | The control method of power supply fan, apparatus and system |
| CN110099542A (en) * | 2018-01-30 | 2019-08-06 | 广达电脑股份有限公司 | Ensure the method for power supply device normal operation in electronic equipment |
| CN108990391A (en) * | 2018-09-05 | 2018-12-11 | 郑州云海信息技术有限公司 | A kind of container data center modularization indirect evaporating-cooling system and method |
| CN108990391B (en) * | 2018-09-05 | 2023-08-18 | 郑州云海信息技术有限公司 | Modularized indirect evaporative cooling system and method for container data center |
| CN109739323A (en) * | 2018-12-26 | 2019-05-10 | 郑州云海信息技术有限公司 | A kind of server power block fan rotational frequency control method and device |
| CN112324691A (en) * | 2020-07-10 | 2021-02-05 | 北京京东尚科信息技术有限公司 | Control method and device for airflow driving device, power supply device and electronic equipment |
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Application publication date: 20130306 |