CN1245871A - Fan control method and device - Google Patents
Fan control method and device Download PDFInfo
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- CN1245871A CN1245871A CN 98117370 CN98117370A CN1245871A CN 1245871 A CN1245871 A CN 1245871A CN 98117370 CN98117370 CN 98117370 CN 98117370 A CN98117370 A CN 98117370A CN 1245871 A CN1245871 A CN 1245871A
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Abstract
The present invention relates to a radiation control method and its equipment, in particular it relates to a fan control method by using CPU and its equipment. By using the hardware redundancy technique of fault tolerance theory said invention at least utilizes two groups of fan devices and detection circuit, and mounts them on the radiator, and utilizes a monitoring circuit to provide information signal for mother board to transfer the fan operation condition. Generally, all the fan devices are being in low-speed operation, and when the detection circuit detects that the operation efficiency of one among them is reduced, the monitoring circuit can control other fan devices to raise rotating speed so as to keep the reliability of operation work of CPU.
Description
The present invention relates to a kind of cooling control method and device, particularly, the present invention is the radiating mode that is applicable to wafer in the servomechanism computer system, especially the control method for fan and the device that refer to central processing unit (CPU) (CPU), so that the central processing unit (CPU) heat dissipation problem is maintained efficient processing mode, and so as to promoting the stability of servomechanism computer system.
After the PC universalness, the common people are more familiar to the function of computer and operation, and impression also changes thereupon, think computer system needn't as in the past need be in the cold air room careful maintenance.Yet, continuous lifting along with the central processing unit (CPU) manufacturing technology, make the transistor that in limited central processing unit (CPU) area, can put into greater number, and under the situation that frequency of okperation also significantly promotes, make the heat dissipation problem of central processing unit (CPU) obviously become one of principal element that influences the computer system stability.
After facing the computer system startup, the temperature that the central processing unit (CPU) surface is distributed constantly rises, the mode that prior art solves then finned on the central processing unit (CPU) surface, moreover, and on this radiating fin, install small-sized fans additional to obtain the improvement of heat dissipation problem.Yet, finned is to increase the mode of surface area, borrow transmission of heat to distribute the heat energy of thermal source such as central processing unit (CPU) surface area, but in some computer casing, then can not accept the radiating fin of large volume as notebook computer, and be effectively to improve the heat dissipation problem of central processing unit (CPU) only by finned.Therefore, radiating treatment for central processing unit (CPU) is that radiating fin adds fan assembly mostly on the market, but fan assembly is to adopt electric energy and utilize miniature motor to be driven, so can out of order problem exist, or because of motor that dust accumulation causes do not change or rotating speed under the degradation problem, and when foregoing problems takes place, if fail in time to notify the computer user, to make the stability of computer system reduce suddenly, at any time might cause damage, control will cause irreparable damage to user or processing procedure.
In the servomechanism computer system, the long computing work of the central processing unit (CPU) situation that is inevitable, therefore, the general PC of the processing of central processing unit (CPU) heat dissipation problem is more paid attention to.Utilizing outside radiating fin and the small-sized fans according to prior art, be provided with the running efficiency that circuit for detecting can in time be monitored fan in addition, be able to the notifying operation personnel when taking place and change or detect fan with convenient fan problem.Yet, present technology mainly is still utilizes a fan assembly to quicken the radiating efficiency of radiating fin, but in the servomechanism computer, the failure problems of above-mentioned running still may take place in fan assembly, and before operator do not finish the fan assembly maintenance as yet, the central processing unit (CPU) radiating efficiency descends, and the reliability that makes central processing unit (CPU) work in the system is become at this moment the focus of problem.Therefore, the present invention develops a cover heat dissipating method be in high efficiency heat dissipation environment with device to keep central processing unit (CPU) always, will be usability and the practicability that helps on the industry.
Main purpose of the present invention provides a kind of control method for fan and device that has high efficiency heat dissipation environment on the central processing unit (CPU) heat dissipation problem.
Another object of the present invention provides a kind of control method for fan and device, to improve the reliability of central processing unit (CPU) computing.
A further object of the present invention provides a kind of control method for fan and device of effective solution central processing unit (CPU) heat dissipation problem, and then increases the stability of computer system.
Because the shortcoming that prior art is caused on the central processing unit (CPU) heat dissipation problem, the present invention utilizes then fault-tolerant (Fault Tolerance), and theoretical hardware repeats (Hardware Redundancy) technology, utilize the fan assembly and the circuit for detecting of at least two groups to be installed on the radiating fin, and utilize a supervisory circuit to provide message signal to motherboard (Mother Board) to transmit the fan running situation.
Under the general operational situation, each fan assembly is in low speed or non-full-speed operation, when circuit for detecting records reduction of one fan running efficient or fault, other fan assembly of supervisory circuit may command improve rotating speed to specified or full-speed operation to keep the effective heat dissipation environment of central processing unit (CPU), and show the fan assembly of abnormal condition with the output message signal, and can change (Hot Swap) fault fan on rolling off the production line not interrupting the central processing unit (CPU) heat dissipation environment, and then keep the reliability of central processing unit (CPU) computing work.After waiting to get rid of the fan running fault, this supervisory circuit utilizes circuit for detecting to learn that each fan runs well, and recovering each fan assembly at once is low speed or non-full-speed operation.
By fault-tolerant theory analysis, but utilize hardware repeat techniques elevator system fault-tolerant ability, the probability that each hardware repetitive breaks down simultaneously is very little, therefore, be used in the processing on the central processing unit (CPU) heat dissipation problem, can than prior art improve central processing unit (CPU) in computer system reliability and obtain better effect, and prolonged the life-span of fan assembly, what system can be in work long hours is stable.
Purpose of the present invention can reach by following measure:
A kind of control method for fan is applicable to that utilization at least two group fan assemblys dispel the heat, and key step comprises:
Step 1: detect the rotating speed of aforementioned fan assembly, to step 2;
Step 2: according to aforementioned rotating speed, judge whether predeterminable event takes place, and is,, not, then be back to step 1 to step 3;
Step 3: promote the running usefulness of the fan assembly that predeterminable event does not take place, to step 4;
Step 4: show that the message signal of aforementioned predeterminable event takes place in expression, to step 5:
Step 5: the fan assembly of aforementioned predeterminable event takes place in maintenance, to step 6;
Step 6: recover the initial setting that operates as of aforementioned fan assembly, to step 1.
Wherein the predeterminable event of abovementioned steps two is aforementioned rotating speed subcritical rotating speed.
Wherein aforementioned critical speed of rotation is low rotation speed.
Wherein the message signal of abovementioned steps four comprises and shows the fan assembly that aforementioned predeterminable event takes place.
Wherein the message signal of abovementioned steps four comprises output one unusual square signal.
Wherein the aforementioned running usefulness of abovementioned steps three liftings is that fan assembly reaches rated speed.
Wherein the rotating speed that is initially set the aforementioned fan assembly of control of abovementioned steps six is between critical speed of rotation and rated speed.
A kind of control method for fan is applicable to two groups of fan assemblys of control, and key step comprises:
Step 1: detect the rotating speed of aforementioned fan assembly, to step 2;
Step 2: whether the aforementioned rotating speed of one fan assembly the subcritical rotating speed, is, to step 3, not, then is back to step 1;
Step 3: the rotating speed that promotes another fan assembly is a rated speed, to step 4;
Step 4: show the message signal of the fan assembly of expression abovementioned steps two, to step 5;
Step 5: the fan assembly of maintenance abovementioned steps two, to step 6;
Step 6: the rotating speed that recovers two aforementioned fan assemblys is an initial speed, to step 1.
Wherein the critical speed of rotation of abovementioned steps two is low rotation speed.
Wherein the initial speed of abovementioned steps six is between critical speed of rotation and rated speed.
Wherein the message signal of abovementioned steps four comprises output one default square signal.
A kind of fan control device applicable to heat radiation work, mainly comprises:
At least two group fan assemblys, each aforementioned fan assembly comprises drive motor, sensor and speed controller, but exportable sensing signal of wherein aforementioned sensor and aforementioned speed controller input instruction signal are controlled aforementioned drive motor rotating speed; And
One supervisory circuit can receive aforementioned sensing signal, and when aforementioned sensing signal was lower than a minimum detectable signal, exportable square signal of this supervisory circuit and output instruction signal improved the rotating speed of drive motor to speed controller.
Wherein aforementioned minimum detectable signal is a low-speed running signal.
Wherein aforementioned square signal is an interrupt signal.
The present invention has following advantage compared to existing technology:
The fan control device that control method for fan is implemented according to the present invention, can effectively solve the disappearance of existing central processing unit (CPU) heat dissipation technology and the inconvenience that causes, and the present invention utilizes the hardware repeat techniques of fault-tolerant theory to solve the central processing unit (CPU) heat dissipation problem, and the reliability of lifting central processing unit (CPU) computing work, and then the stability of system is improved.
Control method for fan of the present invention and device can not interrupt carrying out replacing fault fan on the line under the central processing unit (CPU) heat dissipation environment, and not influence system works, to reach better fault-tolerant effect in fan breaks down incident.
Control method for fan of the present invention and device and plurality of advantages thereof and feature will be further understood from following detailed description and appended diagram.
[diagram simple declaration]
Fig. 1. be the flow chart of control method for fan of the present invention.
Fig. 2. be the functional block diagram of fan control device of the present invention.
Fig. 3. be the circuit diagram of fan control device preferred embodiment of the present invention.
[figure number explanation]
201 ... driving power 202,203 ... fan assembly
204 ... supervisory circuit 205 ... host board
At first consulting Fig. 1, is the flow chart that shows control method for fan of the present invention.In an embodiment of the present invention, be to adopt two groups of fan assemblys to be illustrated.Control method for fan of the present invention is instant servocontrol, and its step is as follows:
Step 101: the rotating speed state of detecting two groups of fans:
When two groups of fan assemblys are in normal working, be that the initial setting fan assembly is in low speed or non-full-speed operation, therefore, utilize two fans to share the work of central processing unit (CPU) heat radiation jointly, use for a long time to obtain fan assembly, prolong the fan assembly life-span.Obtain two groups of rotating speed results of detecting, to step 102.
Step 102: judge that whether two groups of rotation speeds of the fan are all greater than the rotating speed critical value:
The setting of aforementioned rotating speed critical value is to decide to use several groups of fan assemblys, makes the radiating efficiency of central processing unit (CPU) be able to up to specification; If, then being back to step 101 all greater than the rotating speed critical value, both continue the detecting rotation speed of the fan, if the one rotating speed is lower than the rotating speed critical value, then to step 103.
Step 103: promote the not running usefulness of fault fan assembly:
After the one fan assembly breaks down, make the radiating efficiency of central processing unit (CPU) descend, or be lower than specification, and then reach the radiating efficiency that promotes central processing unit (CPU) so as to the running usefulness that promotes another group fan assembly, work reliably to keep central processing unit (CPU).Aforementioned running usefulness refers to utilize the control fan to reach rated speed.Then to step 104.
Step 104: send a message signal and show fan assembly generation running problem, with the reporting system user:
Utilize two fan operating states whether to be lower than the rotating speed critical value, when incident takes place, then send a message signal and check fan assembly, and get rid of failure cause with the reporting system user for the Rule of judgment that incident takes place.To step 105.
Step 105: wait for the eliminating of fan assembly fault:
If the fan failure state is not got rid of always, then be back to step 104, continue to send message signal system for prompting user and get rid of fan failure; Until the fan failure state obtains eliminating, to step 106.
Step 106: recovering two groups of fan assemblys is the initial operation state:
When the fan failure state obtains to get rid of, utilize circuit for detecting can predict the fault rotation speed of the fan and rise, then control low speed or non-full-speed operation that two fans return to original setting.Be back to step 101, continue the running usefulness of monitoring two fans.
Utilize above-mentioned detailed description can obtain to understand the implementation step of control method for fan of the present invention, and cooperate following fan control device of the present invention to solve the central processing unit (CPU) heat dissipation problem.
Please refer to Fig. 2, is the functional block diagram that shows fan control device of the present invention.Fan control device of the present invention comprises a driving power 201, and the power supply supply of fan motor and other circuit is provided, and in embodiments of the invention, can utilize the power supply of servomechanism computer to obtain driving power 201; The fan assembly 202,203 of at least two groups, each fan assembly comprises drive motor, sensor and speed controller, aforementioned drive motor is to drive the fan rotation, and sensor can be detected the rotating speed of fan and produce a tach signal, and speed controller can be accepted the rotating speed of command signal controlling and driving motor; And prosecution circuit 204, can receive the tach signal that sensor produced from fan assembly 202,203, and with the generation of decision incident whether judgement that to carry out the rotating speed state, when the one tach signal does not reach the rotating speed critical value setting, supervisory circuit 204 exportable command signals are to the speed controller of another group fan assembly, to promote rotating speed to turning round at a high speed or rated speed, export a message signal simultaneously to servomechanism host board (Mother Board) 205, check or change fan so as to the reporting system user.
According to the present invention among the embodiment of control method for fan, the prosecution circuit 204 of aforementioned fan control device is not when incident takes place, be that the square signal of exporting with about 5200rpm is expressed as the message signal, when if incident takes place, then 204 outputs of supervisory circuit are expressed as the message signal with the square signal that is lower than 5200rpm, with the not normal state of difference fan work, and further the reporting system user checks or changes fan.
In another embodiment of fan control device of the present invention, supervisory circuit 204 when incident takes place an exportable interrupt signal to host board, to show that aforementioned message signal is in the appropriate display interface.
With reference to figure 3, be the circuit diagram that shows fan control device preferred embodiment of the present invention at last.The driving power Vcc of circuit can utilize the power supply of servomechanism computer system to obtain, wherein FAN1 and FAN2 are the motor of fan, and can sense the armature supply of the aforementioned motor of flowing through via resistance R 1 and R2, and then whether the rotating speed that detects motor is normal, MOS Q1 and Q2 then are speed controller, when its gate received the signal of supervisory circuit, controllable motor was with specified or full-speed operation; The remaining circuit element is promptly formed supervisory circuit, wherein comprises a vibrator circuit, and is last and produce the message signal at the collection utmost point of transistor Q6 and export host circuit board to.
After describing preferred embodiment of the present invention in detail, to be familiar with this technology personage and can clearly to understand, all equivalences of doing according to the technical solution of the utility model are replaced, and all should think to be included in the technical solution of the utility model.
In sum, the present invention has many good characteristics, and solve prior art on the practice with disappearance of using and inconvenience, effective solution is proposed, finish the practical and reliable device, and then reach the value of novel and attached economic benefit, the real application condition that has met patent of invention proposes patent application in accordance with the law.
Claims (14)
1. control method for fan, it is characterized in that: be applicable to that utilization at least two group fan assemblys dispel the heat, key step comprises:
Step 1: detect the rotating speed of aforementioned fan assembly, to step 2;
Step 2: according to aforementioned rotating speed, judge whether predeterminable event takes place, and is,, not, then be back to step 1 to step 3;
Step 3: promote the running usefulness of the fan assembly that predeterminable event does not take place, to step 4;
Step 4: show that the message signal of aforementioned predeterminable event takes place in expression, to step 5;
Step 5: the fan assembly of aforementioned predeterminable event takes place in maintenance, to step 6;
Step 6: recover the initial setting that operates as of aforementioned fan assembly, to step 1.
2. as claim 1 a described control method for fan, it is characterized in that: wherein the predeterminable event of abovementioned steps two is aforementioned rotating speed subcritical rotating speed.
3. as claim 2 a described control method for fan, it is characterized in that: wherein aforementioned critical speed of rotation is low rotation speed.
4. as claim 1 a described control method for fan, it is characterized in that: wherein the message signal of abovementioned steps four comprises and shows the fan assembly that aforementioned predeterminable event takes place.
5. as claim 1 a described control method for fan, it is characterized in that: wherein the message signal of abovementioned steps four comprises output one unusual square signal.
6. as claim 1 a described control method for fan, it is characterized in that: wherein the aforementioned running usefulness of abovementioned steps three liftings is that fan assembly reaches rated speed.
7. as claim 2 or 6 described control method for fan, it is characterized in that: wherein the rotating speed that is initially set the aforementioned fan assembly of control of abovementioned steps six is between critical speed of rotation and rated speed.
8. control method for fan is characterized in that: be applicable to two groups of fan assemblys of control, key step comprises:
Step 1: detect the rotating speed of aforementioned fan assembly, to step 2;
Step 2: whether the aforementioned rotating speed of one fan assembly the subcritical rotating speed, is, to step 3, not, then is back to step 1;
Step 3: the rotating speed that promotes another fan assembly is a rated speed, to step 4;
Step 4: show the message signal of the fan assembly of expression abovementioned steps two, to step 5;
Step 5: the fan assembly of maintenance abovementioned steps two, to step 6;
Step 6: the rotating speed that recovers two aforementioned fan assemblys is an initial speed, to step 1.
9. as claim 8 a described control method for fan, it is characterized in that: wherein the critical speed of rotation of abovementioned steps two is low rotation speed.
10. as claim 8 a described control method for fan, it is characterized in that: wherein the initial speed of abovementioned steps six is between critical speed of rotation and rated speed.
11. as claim 8 a described control method for fan, it is characterized in that: wherein the message signal of abovementioned steps four comprises output one default square signal.
12. a fan control device is characterized in that: applicable to heat radiation work, mainly comprise:
At least two group fan assemblys, each aforementioned fan assembly comprises drive motor, sensor and speed controller, but exportable sensing signal of wherein aforementioned sensor and aforementioned speed controller input instruction signal are controlled aforementioned drive motor rotating speed; And
One supervisory circuit can receive aforementioned sensing signal, and when aforementioned sensing signal was lower than a minimum detectable signal, exportable square signal of this supervisory circuit and output instruction signal improved the rotating speed of drive motor to speed controller.
13. as claim 12 a described fan control device, it is characterized in that: wherein aforementioned minimum detectable signal is a low-speed running signal.
14. as claim 12 a described fan control device, it is characterized in that: wherein aforementioned square signal is an interrupt signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117370A CN1078682C (en) | 1998-08-21 | 1998-08-21 | Fan control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117370A CN1078682C (en) | 1998-08-21 | 1998-08-21 | Fan control method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1245871A true CN1245871A (en) | 2000-03-01 |
| CN1078682C CN1078682C (en) | 2002-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98117370A Expired - Fee Related CN1078682C (en) | 1998-08-21 | 1998-08-21 | Fan control method and device |
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| Country | Link |
|---|---|
| CN (1) | CN1078682C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392612C (en) * | 2004-11-12 | 2008-06-04 | 国际商业机器公司 | Method and system for environment control |
| CN100436831C (en) * | 2001-10-30 | 2008-11-26 | 英业达股份有限公司 | Switching unit of radiator system |
| CN102458082A (en) * | 2010-10-22 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Temperature regulating device for electronic device |
| CN102768568A (en) * | 2011-05-05 | 2012-11-07 | 华硕电脑股份有限公司 | Heat dissipation module and heat dissipation method thereof |
| CN102852845A (en) * | 2012-09-21 | 2013-01-02 | 杭州华三通信技术有限公司 | Method and device for regulating speed of fan |
| CN104470331A (en) * | 2014-12-01 | 2015-03-25 | 哈尔滨海能达科技有限公司 | Fan heat dissipating control method and device |
| CN107514375A (en) * | 2016-06-16 | 2017-12-26 | 建准电机工业股份有限公司 | Fan, control unit for fan and fan control method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI502136B (en) * | 2013-12-17 | 2015-10-01 | Inventec Corp | Fan controlling and detecting system and method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59158398A (en) * | 1983-02-28 | 1984-09-07 | Mitsubishi Heavy Ind Ltd | Volute pump |
| US5436827A (en) * | 1994-06-30 | 1995-07-25 | Tandem Computers Incorporated | Control interface for customer replaceable fan unit |
-
1998
- 1998-08-21 CN CN98117370A patent/CN1078682C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436831C (en) * | 2001-10-30 | 2008-11-26 | 英业达股份有限公司 | Switching unit of radiator system |
| CN100392612C (en) * | 2004-11-12 | 2008-06-04 | 国际商业机器公司 | Method and system for environment control |
| CN102458082A (en) * | 2010-10-22 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Temperature regulating device for electronic device |
| CN102768568A (en) * | 2011-05-05 | 2012-11-07 | 华硕电脑股份有限公司 | Heat dissipation module and heat dissipation method thereof |
| US9087804B2 (en) | 2011-05-05 | 2015-07-21 | Asustek Computer Inc. | Heat dissipating module and heat dissipating method thereof |
| CN102768568B (en) * | 2011-05-05 | 2015-09-02 | 华硕电脑股份有限公司 | Radiating module and heat dissipating method thereof |
| CN102852845A (en) * | 2012-09-21 | 2013-01-02 | 杭州华三通信技术有限公司 | Method and device for regulating speed of fan |
| CN102852845B (en) * | 2012-09-21 | 2015-08-05 | 杭州华三通信技术有限公司 | A kind of fan speed-governing method and device |
| CN104470331A (en) * | 2014-12-01 | 2015-03-25 | 哈尔滨海能达科技有限公司 | Fan heat dissipating control method and device |
| CN107514375A (en) * | 2016-06-16 | 2017-12-26 | 建准电机工业股份有限公司 | Fan, control unit for fan and fan control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1078682C (en) | 2002-01-30 |
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