CN101192065B - Heat radiating fan control device and method - Google Patents
Heat radiating fan control device and method Download PDFInfo
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- CN101192065B CN101192065B CN2006101146608A CN200610114660A CN101192065B CN 101192065 B CN101192065 B CN 101192065B CN 2006101146608 A CN2006101146608 A CN 2006101146608A CN 200610114660 A CN200610114660 A CN 200610114660A CN 101192065 B CN101192065 B CN 101192065B
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Abstract
The invention discloses a device for controlling heat dissipation fans, which comprises a plurality of temperature collecting modules, wherein, each temperature collecting module is used for collecting key point temperature data in the system and reporting the temperature data to a control module; the control module capable of receiving the temperature data from the temperature collecting modules and generating drive control signals and switching control signals according to the temperature data; a plurality of drive circuit modules, wherein, each drive circuit module is used for generating drive signals for a plurality of fans according to the drive control signals from the control module; a plurality of switching modules, wherein, each switching module is used for controlling the operation and stoppage of the plurality of fans according to the switching control signals from the control module, and applying the drive signals of the drive circuit modules onto the operation of the fans. The invention also correspondingly discloses a method of controlling the heat dissipation fans. The invention can effectively reduce noise produced by the fans in the system, prolong the service life of the fans and reduce system complexity and cost.
Description
Technical field
The present invention relates to the heat dissipation technology of the electronics or the communications field, relate in particular to a kind of device and method of controlling radiator fan.
Background technology
In the system design of the electronics or the communications field, thermal design is an important link, is one of method that adopts usually and adopt the fan heat radiation.But fan also is the important source of system noise, and adopts most life-span of fan below 80,000 hours in the system of reality, and when fan was at high temperature worked, the life-span also can reduce greatly, thus fan become in the system reliability weak a bit.In order to improve described problem, some system also begins to adopt all fan control technical methods, its basic ideas all are according to the temperature value that collects, and according to certain algorithm rotation speed of the fan is controlled, but existing fan control technology nearly all are to control at single fan.When existing a plurality of in the system or during multiple fan, existing fan control technology can be carried out identical control simultaneously for all fans in the system, perhaps at each fan an individual drive loop is set.Yet when number of fans more for a long time, if carry out identical control for all fans, the system radiating performance does not obtain largest optimization, causes the part fan to shorten serviceable life meaninglessly; If provide an individual drive loop for each fan in the system, then system complexity improves greatly, and cost promotes, and has increased a lot of workloads more can for the later stage product maintenance.
In summary, the control technology of existing radiator fan obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
Summary of the invention
First purpose of the present invention is to provide a kind of device of controlling radiator fan, has realized the raising in fan serviceable life and the reduction of system complexity and system cost.
Second purpose of the present invention is to provide a kind of method of controlling radiator fan, realized the raising in fan serviceable life and the reduction of system complexity and system cost.
In order to realize above-mentioned first purpose, the invention provides a kind of device of controlling radiator fan, comprising:
Some temperature collect modules, each temperature collect module are used for the temperature data of acquisition system key point and report control module;
Control module is used to receive the temperature data of described temperature collect module, and generates drive control signal and switch controlling signal according to temperature data;
Some drive circuit modules, each drive circuit module is used for the drive control signal according to control module, generates the drive signal for plurality of fans work;
Some switch modules, each switch module is used for the switch controlling signal according to control module, control does not need the fan of work to be in stop state, or makes the needs fans in operation be in operating condition according to the rotating speed of setting according to the drive signal of described drive circuit module.
According to device of the present invention, described temperature collect module is monitored in real time to the temperature of each key point in the system, upgrades the temperature data of gathering at the fixed time and reports control module.
According to device of the present invention, described temperature collect module initiatively reports the temperature data that collects or the passive control module that reports.
According to device of the present invention, described control module is connected with temperature collect module, drive circuit module and/or switch module by wired mode or wireless mode.
According to device of the present invention, described drive circuit module provides pulse/frequency modulated signal to ac fan; Provide d. c. voltage signal or pulse/frequency modulated signal to DC fan.
According to device of the present invention, the drive signal of described drive circuit module is the output signal of control plurality of fans transformation of speed, and drive circuit module is adjusted drive signal according to the drive control signal of control module.
According to device of the present invention, the quantity of described drive circuit module and switch module is relevant with the fan classification, the plurality of fans of the corresponding classification of each drive circuit module and switch module.
In order to realize above-mentioned second purpose, the invention provides a kind of method of controlling radiator fan, comprise the steps:
A, the temperature data by each key point in the temperature collect module acquisition system, and with this temperature data and report control module;
B, the temperature data that reports according to temperature collect module, control module generates drive control signal and switch controlling signal;
C, according to the drive control signal of control module, drive circuit module generates the drive signal for plurality of fans work;
D, according to the switch controlling signal of control module, switch module control does not need the fan of work to be in stop state, or makes the fan of needs running be in operating condition according to the rotating speed of setting according to the drive signal of described drive circuit module.
The method according to this invention, the drive signal of drive circuit module is the output signal of control plurality of fans transformation of speed among the described step C, and drive circuit module is adjusted drive signal according to the drive control signal of control module.
The method according to this invention, the quantity of described drive circuit module and switch module is relevant with the fan classification, the plurality of fans of the corresponding classification of each drive circuit module and switch module.
The temperature data that control module of the present invention reports according to temperature collect module, the output of control Driver Circuit module, make drive circuit module produce the drive signal that is fit to fan work, simultaneously, the gauge tap module, making the fan that needs running can obtain drive signal supplies with, according to predetermined rotary speed working, thereby rotation speed of the fan is reduced, then directly cutting off drive signal for the fan that does not need to turn round supplies with, make it be in stop state, the noise that produces because of fan in the reduction system effectively, the serviceable life of prolongation fan; And adopt single drive circuit module for similar fan, reduce system complexity, improve system reliability, and the reduction that has realized system cost.
Description of drawings
Fig. 1 is the structured flowchart that the present invention controls radiator fan device;
Fig. 2 is the process flow diagram that the present invention controls the radiator fan method.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Basic thought of the present invention is: the temperature data that control module reports according to temperature collect module, the output of control Driver Circuit module, make drive circuit module produce the drive signal that is fit to fan work, simultaneously, the gauge tap module, making needs the fan of running can obtain drive signal, according to predetermined rotary speed working, then directly cut off for the fan that does not need to turn round the drive signal of fan is supplied with, make it be in stop state.
The device of control radiator fan provided by the invention comprises n temperature collect module as shown in Figure 1,1 control module, and i drive circuit module, i switch module and i fan group, wherein number of fans is indefinite in every group of fan.
Temperature collect module 11～1n is responsible for the temperature data of key point in the acquisition system and with the temperature data of key point respectively separately or unifiedly report control module 2, and described temperature data can be digital signal or simulating signal.
Control module 2 is responsible for receiving the temperature data that temperature collect module 11～1n reports, and according to temperature data, generates control signal according to certain algorithm (setting according to system's real needs).Control signal comprises drive control signal and switch controlling signal, and drive control signal is used for control Driver Circuit module 31～3i working method, changes the output of drive circuit module, makes drive circuit module produce the drive signal that is fit to fan work; Switch controlling signal is used for gauge tap module 41～4i, makes the fan that needs to turn round can obtain the drive signal of drive circuit module 31～3i and according to the rotary speed working of setting, not need the fan of work to be in stop state and make.
It can be to connect by wired mode that the signal of control module 2 and other each module is connected, as can directly using internal integrate circuit bus (Inter-Integrated Circuit, I between control module 2 and the temperature collect module 11～1n
2C) wired mode such as bus connects, and also can connect by the wireless infrared mode that comprises.If adopt the wireless connections mode, must add radio receiving transmitting module between control module 2 and other inside modules that need connect, as data communication interface.Adopt the wireless connections mode, total system can have greater flexibility, but relative wired connection mode, system cost can rise.
Described control module 2 can adopt universal cpu (Central Processing Unit, central processing unit)/MCU (Micro Controller Unit, single-chip microcomputer)/programming device or other special circuit to realize.Temperature collect module 11～1n adopts has I
2The temperature sensing chip LM75 of C interface, per like this 8 sensing chips can pass through an I
2The C bus links to each other with CPU/MCU.Also can (Input/Output, IO) mouth be used as I with the general input and output of CPU/MCU
2C interface usefulness, software is according to I
2Each temperature sensing chip of C protocol access reads the temperature data of key point.
Drive circuit module 31～3i is responsible for the drive control signal according to control module 2, is respectively fan group 51～5i drive signal is provided, and the control rotation speed of the fan changes.Such as for ac fan, provide pulse/frequency modulated signal; For DC fan, provide d. c. voltage signal or pulse/frequency modulated signal.The quantity of described drive circuit module 31～3i is relevant with the fan classification, the plurality of fans of the corresponding classification of each drive circuit module.If there is the plurality of specifications fan in the system, then need the drive circuit module of respective numbers.Can adopt single drive circuit module for similar fan, reduce system complexity, improve system reliability, reduce system cost.Also can classify the quantity of drive circuit module in the decision systems according to the specification of fan and the installation site of fan.As the fan that adopts special-purpose control rotating speed pin is arranged, then drive circuit module output need meet corresponding fan signaling interface standard.Do not have special-purpose control rotating speed pin as fan, then can be added to magnitude of voltage size on the fan, the rotating speed of fan is adjusted by control.But setting range is less like this, and at this time drive circuit module output is exactly the power supply of fan.
Switch module 41～4i is used for the switch controlling signal according to control module, controls the running or the stall of plurality of fans in each group of fan group 51～5i respectively, and the drive signal of the drive circuit module 31～3i of correspondence is added on fans in operation group 51～5i.Switch module uses automatically controlled/switching devices such as magnetic control, as relay or metal-oxide-semiconductor, transistor etc.When only having single fan, switch module can save.The quantity of described switch module is relevant with the fan classification, the plurality of fans of the corresponding classification of each switch module.For windy fan system, a switch module can be responsible for a fan, also can be responsible for a plurality of similar fans.
Fan group 51～5i is the heat radiation execution unit of system.Can adopt fan, so that control module is gathered each fan-status, make optimized control, and can notify fan failure at once with state indication (as tach signal, stall indication etc.).Fan can adopt direct current or ac fan.If adopt the fan of direct current, can use Metal-oxide-semicondutor (Metal-Oxide-Semiconductor, MOS) pipe is as the switch module performer, and this moment, drive circuit module mainly was exactly the direct supply output that produces an adjustable level, perhaps produced pulsewidth/frequency modulated signal.If produce the direct supply output of adjustable level, drive circuit module can adopt the Universal adjustable DC-DC, and (Direct Current-DirectCurrent, DC-DC) circuit adopt electronic potentiometer in its feedback sample loop.Control module is adjusted the output of DC-DC circuit by the change in resistance of control electronic potentiometer, and it is changed in the range of nominal tension that fan can bear.If produce pulsewidth/frequency modulated signal, drive circuit module can directly adopt metal-oxide-semiconductor.Include width modulation (PWM, Pulse Width Modulation) module as MCU/CPU, and the metal-oxide-semiconductor grid can drive with MCU/CPU PWM output pin directly.Realize that output pulse width/frequency modulated signal comes the driven MOS tube grid otherwise can add programming device or special chip in the drive circuit module, adjust its output with the control of the MCU/CPU in the control module.Control module is adjusted the conducting of metal-oxide-semiconductor in the drive circuit module and is turn-offed the cycle according to the temperature data of current each key point, and conducting turn-off time ratio in the one-period.
Fig. 2 is the method for control radiator fan provided by the invention, and idiographic flow is as follows:
Step S201 determines each key point of existing in the system, gathers the temperature data of each key point in the described system by temperature collect module, and this temperature data is reported control module.Described key point is the parts of thermal value maximum or the parts the most responsive to temperature variation in the system often.Temperature collect module is monitored in real time to the temperature value of each key point collection in the system, upgrades the temperature data of gathering at the fixed time and reports control module.The data that collect can adopt active to report or the passive mode that reports reports control module.The temperature data of each key point reports the foundation of control module as control module control Driver Circuit module and switch module operation in the follow-up flow process.
Step S202, according to the temperature data that temperature collect module reports, control module generates drive control signal and switch controlling signal.Here, need the fan of work to reach the fan that does not need work in the control module major decision system, the switch controlling signal of gauge tap module, need the rotation speed of the fan of work and the drive control signal of controlling corresponding drive circuit module, final like this can making do not need the stall of the fan of work, need the fan of work to obtain suitable speed controling signal, can be according to the rotary speed working of demand.
Step S203, according to the drive control signal of control module, drive circuit module generates the drive signal of air feed fan work.Because fan specification kind is more,, produce the drive signal of control rotating speed so will carry out suitable drive circuit module design according to the fan type of selecting for use.For the DC fan that does not have rotating speed control, the size of voltage that can only be by being added in fan is carried out the rotating speed adjustment, and setting range herein is less, and at this moment just requiring drive circuit module to produce one has power driving force and the adjustable direct current output of magnitude of voltage.And, just require drive circuit module to produce the pwm signal of an energy in the fan receive frequency range for the DC fan that adopts pwm signal control rotating speed.
Step S204, according to the switch controlling signal of control module, switch module is controlled the running or the stall of plurality of fans, and the drive signal of described drive circuit module is added on the fans in operation.During the signal that will note on the circuit design allowing fan can not get drive circuit module, fan is in halted state.Can just can effectively reduce the quantity of drive circuit module like this, reduce system cost by switch module work.
In summary, the present invention is by the control Driver Circuit module drive, and rotation speed of the fan is reduced, perhaps directly cuts off the drive signal of fan is supplied with by switch module, in the reduction system effectively because of the noise of fan generation, prolongation fan serviceable life.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. a device of controlling radiator fan is characterized in that, comprising:
Some temperature collect modules, each temperature collect module are used for the temperature data of acquisition system key point and report control module;
Control module is used to receive the temperature data of described temperature collect module, and generates drive control signal and switch controlling signal according to temperature data;
Some drive circuit modules, each drive circuit module is used for the drive control signal according to control module, generates the drive signal for plurality of fans work;
Some switch modules, each switch module is used for the switch controlling signal according to control module, control does not need the fan of work to be in stop state, or makes the needs fans in operation be in operating condition according to the rotating speed of setting according to the drive signal of described drive circuit module.
2. device according to claim 1 is characterized in that described temperature collect module is monitored in real time to the temperature of each key point in the system, upgrades the temperature data of gathering at the fixed time and reports control module.
3. device according to claim 1 is characterized in that, described temperature collect module initiatively reports the temperature data that collects or the passive control module that reports.
4. device according to claim 1 is characterized in that, described control module is connected with temperature collect module, drive circuit module and/or switch module by wired mode or wireless mode.
5. device according to claim 1 is characterized in that described drive circuit module provides pulse/frequency modulated signal to ac fan; Provide d. c. voltage signal or pulse/frequency modulated signal to DC fan.
6. according to each described device of claim 1～5, it is characterized in that, the drive signal of described drive circuit module is the output signal of control plurality of fans transformation of speed, and drive circuit module is adjusted drive signal according to the drive control signal of control module.
7. according to each described device of claim 1～5, it is characterized in that the quantity of described drive circuit module and switch module is relevant with the fan classification, the plurality of fans of the corresponding classification of each drive circuit module and switch module.
8. a method of controlling radiator fan is characterized in that, comprises the steps:
A, the temperature data by each key point in the temperature collect module acquisition system, and with this temperature data and report control module;
B, the temperature data that reports according to temperature collect module, control module generates drive control signal and switch controlling signal;
C, according to the drive control signal of control module, drive circuit module generates the drive signal for plurality of fans work;
D, according to the switch controlling signal of control module, switch module control does not need the fan of work to be in stop state, or makes the fan of needs running be in operating condition according to the rotating speed of setting according to the drive signal of described drive circuit module.
9. method according to claim 8, it is characterized in that, the drive signal of drive circuit module is the output signal of control plurality of fans transformation of speed among the described step C, and drive circuit module is adjusted drive signal according to the drive control signal of control module.
10. according to Claim 8 or 9 described methods, it is characterized in that the quantity of described drive circuit module and switch module is relevant with the fan classification, the plurality of fans of the corresponding classification of each drive circuit module and switch module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006101146608A CN101192065B (en) | 2006-11-20 | 2006-11-20 | Heat radiating fan control device and method |
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| CN2006101146608A CN101192065B (en) | 2006-11-20 | 2006-11-20 | Heat radiating fan control device and method |
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| CN101192065A CN101192065A (en) | 2008-06-04 |
| CN101192065B true CN101192065B (en) | 2010-07-14 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011742B (en) * | 2009-09-04 | 2013-11-06 | 中兴通讯股份有限公司 | A device and a method for association fan rotating speed control |
| CN101788841A (en) * | 2010-03-12 | 2010-07-28 | 浪潮(北京)电子信息产业有限公司 | Cluster heat radiating system and heat radiating method |
| CN101985946B (en) * | 2010-10-22 | 2014-10-29 | 北京星网锐捷网络技术有限公司 | Fan speed-regulation control circuit as well as control method and electronic device thereof |
| CN102478004B (en) * | 2010-11-22 | 2015-09-16 | 中兴通讯股份有限公司 | Full-automatic fan control method and device |
| CN106487399A (en) * | 2016-07-29 | 2017-03-08 | 无锡信大气象传感网科技有限公司 | A kind of anti-tampering wireless data receiver for environmental monitoring |
| CN107257590B (en) * | 2017-06-16 | 2020-11-24 | 广东美的厨房电器制造有限公司 | Control method and cooking appliance |
| CN113586503B (en) * | 2020-04-30 | 2022-09-27 | 同方威视技术股份有限公司 | Serial connection control method of multiple fan speed regulation modules and system for realizing method |
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| CN1331402A (en) * | 2000-06-30 | 2002-01-16 | 华为技术有限公司 | Intelligent controller for heat sink of fan |
| CN1536232A (en) * | 2003-04-09 | 2004-10-13 | 华为技术有限公司 | Fan monitoring device and its monitoring method |
| CN2708010Y (en) * | 2004-04-01 | 2005-07-06 | 周青麟 | Fan control device |
| CN1854528A (en) * | 2005-04-26 | 2006-11-01 | 台达电子工业股份有限公司 | Fan module and its controller |
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| CN1331402A (en) * | 2000-06-30 | 2002-01-16 | 华为技术有限公司 | Intelligent controller for heat sink of fan |
| CN1536232A (en) * | 2003-04-09 | 2004-10-13 | 华为技术有限公司 | Fan monitoring device and its monitoring method |
| CN2708010Y (en) * | 2004-04-01 | 2005-07-06 | 周青麟 | Fan control device |
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