CN101684823A - Controlling device, controlling method and computer for electrical equipment fan - Google Patents
Controlling device, controlling method and computer for electrical equipment fan Download PDFInfo
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- CN101684823A CN101684823A CN200810222682A CN200810222682A CN101684823A CN 101684823 A CN101684823 A CN 101684823A CN 200810222682 A CN200810222682 A CN 200810222682A CN 200810222682 A CN200810222682 A CN 200810222682A CN 101684823 A CN101684823 A CN 101684823A
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Abstract
The invention provides a controlling device, a controlling method and a computer for an electrical equipment fan, the controlling device comprises a module which is used for getting generated parameters of a first pulse width modulation wave which corresponds to first temperature, the first temperature is the current temperature of an action object of a fan, the first pulse width modulation wave which corresponds to the generated parameters of the first pulse width modulation wave comprises at least two first pulses, pulse width of at least two second pulses in at least two first pulses is different; the controlling device also comprises a module which is used for generating the first pulse width modulation wave according to the generated parameters of the first pulse width modulation waveand a module which is used for sending the first pulse width modulation wave to the fan, variable-speed rotation of the fan is controlled by the module, heat dissipation requirement of the action object under the first temperature is met, and the value of hearing parameter of sound which is generated by the rotation of the fan under the control of each second pulse is different in at least two second pulses. The effect to the hearing of a user when the fan is operated is reduced by the invention.
Description
Technical field
The present invention relates to the electronic equipment dissipating heat technical field, particularly a kind of control gear, controlling method and computer that is used for electrical equipment fan.
Background technique
And a lot of components and parts in the electronic equipment all have certain requirement to the temperature of working environment, and these components and parts only could guarantee normally to work efficiently in other words conj.or perhaps when ambient temperature is lower than uniform temperature.
Yet, in the present electronic equipment, increasing components and parts are integrated into a limited space, and each electronic parts and components all can outwards be launched certain heat in its working state, therefore, when electronic device works, the temperature of its working space will be significantly higher than extraneous temperature, thereby causes some electronic parts and components to work normally and efficiently.
In order to address the above problem, prior art adopts the type of cooling that electronic parts and components are dispelled the heat, and comprises air cooling way in these types of cooling, and air cooling way is walked hot air by the rotating band of fan, realizes heat radiation.
The inventor finds that there is following problem at least in prior art in realizing process of the present invention:
Under the air cooling way, the noise that fan produces becomes noise source main, maximum in the electronic equipment, has brought puzzlement acoustically to the user.
The noise of fan mainly is the friction when rotating the distinguished and admirable and bearing rotation that produces from flabellum.Along with fan structure, matter material, the improvement of aspects such as bearing, the noisiness of fan has obtained bigger reduction, yet, no matter how improve, fan is when running up, and the noise of its generation is still bigger, has greatly influenced the impression of user's use electronic equipment.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of control gear, controlling method and computer that is used for electrical equipment fan, and the sound that produces when reducing fan running is to the stimulation of user's sense of hearing.
To achieve these goals, the embodiment of the invention provides a kind of control gear that is used for electrical equipment fan, comprising:
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with first temperature, described first temperature is the Current Temperatures of the effective object of described electrical equipment fan, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Pulse duration modulation ripple generation module is used for generating parameter according to the described first pulse duration modulation ripple and generates the described first pulse duration modulation ripple;
Transmitting module, be used for the described first pulse duration modulation ripple is sent to described electrical equipment fan, controlling described electrical equipment fan speed change rotates, satisfy the heat radiation requirement of described effective object under described first temperature, and in described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described electrical equipment fan under each described second pulse control produces when rotating.
Above-mentioned control gear wherein, also comprises:
Judge module is used for according to judging that parameter judges whether default trigger condition is set up, and obtains a triggering judged result;
Start module, be used for when described triggering judged result indicates described default trigger condition to set up, starting described parameter acquisition module.
Above-mentioned control gear, wherein, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
Above-mentioned control gear, wherein, described parameter acquisition module specifically comprises:
Storage unit is used for the corresponding relation between memory action object temperature and the predetermined pulse width modulated ripple generation parameter;
Matching unit is used for more described Current Temperatures and described effective object temperature, obtains the first effective object temperature with described Current Temperatures coupling from the described effective object temperature of preserving in advance;
Acquiring unit is used for obtaining the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generating parameter according to the corresponding relation between described effective object temperature and the predetermined pulse width modulated ripple generation parameter.
Above-mentioned control gear, wherein, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated ripple generation parameter is a temperature range.
To achieve these goals, the embodiment of the invention also provides a kind of controlling method that is used for electrical equipment fan, wherein, comprising:
Obtain the Current Temperatures of the effective object of described electrical equipment fan;
The first pulse duration modulation ripple that obtains described Current Temperatures correspondence generates parameter, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence comprises at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Generate parameter according to the described first pulse duration modulation ripple and generate the described first pulse duration modulation ripple;
The described first pulse duration modulation ripple is sent to described electrical equipment fan, control described electrical equipment fan speed change and rotate, satisfy the heat radiation requirement of described effective object under described Current Temperatures;
In described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described electrical equipment fan under each described second pulse control produces when rotating.
Above-mentioned method wherein, also comprises:
Judge that according to judging parameter whether default trigger condition is set up, and obtains one and triggers judged result;
When described triggering judged result indicates described default trigger condition to set up, enter the step that the described first pulse duration modulation ripple that obtains described Current Temperatures correspondence generates parameter.
Above-mentioned method, wherein, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
Above-mentioned method, wherein, the described step of obtaining first pulse width modulated waveform of described Current Temperatures correspondence specifically comprises:
More described Current Temperatures and the effective object temperature of preserving are in advance obtained the first effective object temperature with described Current Temperatures coupling from described effective object temperature;
Corresponding relation according between described effective object temperature and the predetermined pulse width modulated ripple generation parameter obtains the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generates parameter.
Above-mentioned method, wherein, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform is a temperature range.
To achieve these goals, the embodiment of the invention also provides a kind of computer, comprises mainboard, and described mainboard is provided with to be treated heat dissipation element and be used for the described heat dissipation element for the treatment of is carried out the fan of wind-cooling heat dissipating, it is characterized in that, also is provided with on the described mainboard:
Temperature transducer is used to obtain the described Current Temperatures for the treatment of heat dissipation element;
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with described Current Temperatures, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Pulse duration modulation ripple generation module is used for generating parameter according to the described first pulse duration modulation ripple and generates the described first pulse duration modulation ripple;
Transmitting module is used for the described first pulse duration modulation ripple is sent to described fan, controls described fan speed change and rotates, and satisfies the described heat radiation requirement of heat dissipation element under described Current Temperatures for the treatment of;
In described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described fan under each described second pulse control produces when rotating.
Above-mentioned computer wherein, also comprises:
Judge module is used for according to judging that parameter judges whether default trigger condition is set up, and obtains a triggering judged result;
Start module, be used for when described triggering judged result indicates described default trigger condition to set up, starting described parameter acquisition module.
Above-mentioned computer, wherein, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
Above-mentioned computer, wherein, described pulse width modulated waveform acquisition module specifically comprises:
Storage unit is used for the corresponding relation between memory action object temperature and the predetermined pulse width modulated ripple generation parameter;
Matching unit is used for more described Current Temperatures and described effective object temperature, obtains the first effective object temperature with described Current Temperatures coupling from the described effective object temperature of preserving in advance;
Acquiring unit is used for according to the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform, obtains the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generates parameter.
Above-mentioned computer, wherein, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform is a temperature range.
The embodiment of the invention has following beneficial effect:
The control gear that is used for electrical equipment fan of the embodiment of the invention, controlling method and computer, the waveform that is used for PWM (the Pulse Width Modulation) ripple of drive fan, the pulse width difference of at least two pulses, under the driving of the PWM of this specific waveforms ripple, electrical equipment fan can satisfy the requirement of heat radiation, simultaneously because in the waveform of PWM (Pulse Width Modulation) ripple, the pulse width difference of at least two pulses, therefore fan rotates and is the speed change rotation, can have certain rhythm or rhythm, when having reduced fan running to the influence of user's sense of hearing.
Description of drawings
Fig. 1 is the structural representation of the control gear that is used for electrical equipment fan of the embodiment of the invention;
Fig. 2 is the schematic flow sheet of the controlling method that is used for electrical equipment fan of the embodiment of the invention;
Fig. 3 is the various possible PWM waveform that is used for drive fan and the comparison diagram that is used for the PWM waveform of drive fan of the prior art of the embodiment of the invention.
Embodiment
The control gear that is used for electrical equipment fan, controlling method and the computer of the embodiment of the invention, control is used for the waveform of PWM (the Pulse Width Modulation) ripple of drive fan, under the driving of the PWM of this specific waveforms ripple, electrical equipment fan can satisfy the requirement of heat radiation, simultaneously electrical equipment fan rotates the sound that sends and has certain rhythm or rhythm, when having reduced fan running to the influence of user's sense of hearing.
The control gear that is used for electrical equipment fan of the embodiment of the invention comprises as shown in Figure 1:
Temperature transducer is used to obtain the Current Temperatures of the effective object of described electrical equipment fan; Yet this temperature transducer can not be the part of control gear also, can be arranged at the control gear outside, for it provides temperature parameter.
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with first temperature, described first temperature is the Current Temperatures of the effective object of described electrical equipment fan, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
PWM ripple generation module is used for generating parameter according to the described first pulse duration modulation ripple and generates a described PWM ripple;
Transmitting module, be used for a described PWM ripple is sent to described electrical equipment fan, controlling described electrical equipment fan speed change rotates, satisfy the heat radiation requirement of described effective object under described Current Temperatures, in while described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described electrical equipment fan under each described second pulse control produces when rotating.
In specific embodiments of the invention, this sense of hearing parameter can be volume, scale etc.
The control gear that is used for electrical equipment fan in the specific embodiments of the invention can be used to control electrical equipment fan separately, also can combine and realize control electrical equipment fan with the control gear of the electrical equipment fan of prior art, when the control gear that must need to control the embodiment of the invention this moment is enabled, therefore, the control gear that is used for electrical equipment fan of the embodiment of the invention also comprises:
Judge module is used for according to judging that parameter judges whether default trigger condition is set up, and obtains a triggering judged result;
Start module, be used for when described triggering judged result indicates described default trigger condition to set up, starting described parameter acquisition module.
In general, the noise that the control module of existing electrical equipment fan is produced under the lower situation of rotating speed is lower, influence to user's sense of hearing is less, can not adopt the device of the embodiment of the invention this moment, therefore, the device of the embodiment of the invention can only just adopt the device of the embodiment of the invention to control when rotation speed of the fan is higher than a predetermined value, and rotation speed of the fan can pass through self, the factors such as noise that the Current Temperatures of effective object and fan running send are determined, therefore, in specific embodiments of the invention, this judge module can judge whether default trigger condition is set up according to following parameter:
The Current Temperatures of effective object (Current Temperatures of effective object is big more, shows that the rotation speed of the fan of needs is high more); And/or
The current rotating speed of fan; And/or
The fan current volume, the sound size of just sending (it is big more to sound, and shows that rotating speed is high more).
The controlling method that is used for electrical equipment fan of the embodiment of the invention comprises as shown in Figure 2:
According to above-mentioned description, in specific embodiments of the invention, in a certain temperature, owing to drive the pwm pulse that the PWM ripple of this electrical equipment fan has different pulse widths, therefore under this temperature, fan can be done speed change and rotate, so the flabellum of fan rotates the sound that the friction of the distinguished and admirable and bearing that produces when rotating send and can have certain rule, can form the sound of the specific rhythm or rhythm, the sound that produces when reducing fan running greatly is to the stimulation of user's sense of hearing.
In specific embodiments of the invention, the fan that a PWM ripple drives need satisfy certain condition, and is as follows:
At first, the fan under this PWM ripple control can satisfy the heat radiation requirement of effective object under described Current Temperatures;
The sound that sends when secondly, the fan under this PWM ripple control is done the speed change rotation has certain rhythm or rhythm (the value difference of the sense of hearing parameter of the sound that produces when electrical equipment fan rotates)
Consider that two above-mentioned conditions are all directly related with the rotating speed of fan, and the rotating speed of fan is directly related with the pulse width of the pwm pulse of drive fan, therefore, above-mentioned condition finally is converted into this parameter of pulse width of determining the pwm pulse in the PWM ripple.
In the subsequent descriptions of specific embodiments of the invention, this parameter of pulse width is embodied intuitively with oscillogram.
In specific embodiments of the invention, can determine that first kind of implementation is described in detail as follows by the mode of off-line:
Substantially, fan is converted into mechanical energy with electric energy, drive air flows, if the energy that the unit time internal fan consumes is identical, then driven air is basic identical, also just possesses essentially identical refrigerating capacity, therefore, utilize the electric energy of fan consumption to carry out judgement under first kind of implementation, process is as described below:
When obtaining fan of the prior art and satisfying the heat radiation of effective object under first temperature and require, the benchmark electric energy that is consumed in the unit time;
Generation is corresponding to a plurality of PWM waveforms of first temperature, in the described PWM waveform, the pulse width difference of at least two pulses, as shown in Figure 3, waveform schematic representation for several PWM, uppermost waveform is the waveform of PWM ripple of control fan in the prior art among Fig. 3, and following waveform schematic representation for several possible PWM that enumerates;
Utilize each the PWM Waveform Control fan that generates to rotate, obtain the test electric energy that is consumed in the fan unit time;
From a PWM waveform that generates, delete the PWM waveform of those test electric energy at last less than the benchmark electric energy.
At this moment, the PWM ripple with remaining described PWM waveform goes drive fan, just can satisfy the heat radiation requirement under first temperature.
Second kind of implementation is described in detail as follows:
Substantially, the fans drive air flows if the amount of unit time internal fan driven air is identical, also just possesses essentially identical refrigerating capacity, therefore, utilizes fan to agitate the volume of air to carry out judgement under second kind of implementation, and process is as described below:
When obtaining fan of the prior art and satisfying the heat radiation of effective object under first temperature and require, the base volume of the air that the unit time internal fan is agitated;
Generation is corresponding to a plurality of PWM waveforms of first temperature, in the described PWM waveform, and the pulse width difference of at least two pulses;
Utilize each the PWM Waveform Control fan that generates to rotate, obtain the test volume of the air of being agitated in the fan unit time;
From a PWM waveform that generates, delete the PWM waveform of those test volume at last less than base volume.
At this moment, the PWM ripple with remaining described PWM waveform goes drive fan, just can satisfy the heat radiation requirement under first temperature.
The third implementation is described in detail as follows:
If the mean speed of unit time internal fan is identical, its refrigerating capacity is also basic identical, and pwm pulse is a kind of have the fixed cycle (T), the digital signal of EDM Generator of Adjustable Duty Ratio.The rotating speed adjustment of fan is exactly recently to change average voltage by the duty of controlling pwm signal, reaches the purpose that changes motor speed.Therefore, under the third implementation, utilize the pulse width of pwm pulse to carry out judgement, process is as described below:
When obtaining fan of the prior art and satisfying the heat radiation of effective object under first temperature and require, the reference pulse width sum of the pulse of the PWM ripple of output in the unit time;
Generation is corresponding to a plurality of PWM waveforms of first temperature, in the described PWM waveform, and the pulse width difference of at least two pulses, and obtain the test pulse width sum of the pulse in the unit time in each PWM waveform;
From a PWM waveform that generates, delete the PWM waveform of those examination pulse width sums at last less than reference pulse width sum.
At this moment, the PWM ripple with remaining described PWM waveform goes drive fan, just can satisfy the heat radiation requirement under first temperature.
Fan under the one PWM Waveform Control that can guarantee to be left by above method can satisfy the heat radiation requirement of the effective object under first temperature.
Determine that by above-mentioned process the fan under the remaining PWM Waveform Control can satisfy the heat radiation requirement of the effective object under first temperature, whether the sound that also needs to test the fan rotation under a remaining PWM Waveform Control this moment can have certain rhythm or rhythm, the work of this part can be described below by manually realization:
Utilize the PWM ripple control fan of a remaining PWM waveform to rotate, a pairing PWM waveform gets final product when therefrom selecting the sound of fan rotation to have certain rhythm or rhythm by the user.
Certainly, also can gather fan and rotate the sound that sends, utilize certain criterion to carry out computer and select automatically.
By above-mentioned complete process, the embodiment of the invention can be set up following corresponding relation:
| The effective object temperature | The PWM waveform |
| Temperature 1 | Waveform 1 |
| Temperature 2 | Waveform 2 |
| Temperature 3 | Waveform 3 |
| ??...... | ??...... |
| Temperature n | Waveform n |
Therefore, the PWM waveform acquisition module of the specific embodiment of the invention specifically comprises:
Storage unit is used for the corresponding relation between memory action object temperature and the default PWM waveform (generating parameter corresponding to the PWM ripple), in the described default PWM waveform, and the pulse width difference of at least two pulses;
Matching unit is used for more described Current Temperatures and described effective object temperature, obtains the first effective object temperature with described Current Temperatures coupling from described described effective object temperature of preserving in advance;
Acquiring unit is used for according to the corresponding relation between described effective object temperature and the default PWM waveform, obtains a described PWM waveform corresponding with the described first effective object temperature.
In specific embodiments of the invention, consider sometimes to exist temperature variation faster under the situation that the effective object temperature is a temperature range in therefore above-mentioned effective object temperature and the corresponding relation between the default PWM waveform, and is as follows:
| The effective object temperature | The PWM waveform |
| Temperature 1～temperature 2 | Waveform 1 |
| Temperature 2～temperature 3 | Waveform 2 |
| Temperature 3～temperature 4 | Waveform 3 |
| ??...... | ??...... |
| Temperature n-1～temperature n | Waveform n |
Certainly, the big I of this temperature range is set as required.
When serviceability temperature was interval, in the mode of the pulse width of the pwm pulse in 3 kinds of definite PWM ripples introducing previously, this first temperature was interval maximum temperature, and other aspects are identical, no longer are repeated in this description at this.
Under the situation of temperature range, very fast even Current Temperatures changes, the driving PWM ripple of fan can not change yet, so the sound that fan sends also can maintain on a metastable rhythm and the rhythm, helps reducing the interference to user's hearing.
The computer of the embodiment of the invention comprises mainboard, and described mainboard is provided with to be treated heat dissipation element and be used for the described heat dissipation element for the treatment of is carried out the fan of wind-cooling heat dissipating, wherein, also comprises:
Temperature transducer is used to obtain the described Current Temperatures for the treatment of heat dissipation element;
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with described Current Temperatures, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
PWM ripple generation module is used to generate a described PWM ripple;
Transmitting module, be used for a described PWM ripple is sent to described fan, controlling described fan speed change rotates, satisfy the described heat radiation requirement of heat dissipation element under described Current Temperatures for the treatment of, in while described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described fan under each described second pulse control produces when rotating.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (15)
1. a control gear that is used for electrical equipment fan is characterized in that, comprising:
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with first temperature, described first temperature is the Current Temperatures of the effective object of described electrical equipment fan, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Pulse duration modulation ripple generation module is used for generating parameter according to the described first pulse duration modulation ripple and generates the described first pulse duration modulation ripple;
Transmitting module, be used for the described first pulse duration modulation ripple is sent to described electrical equipment fan, controlling described electrical equipment fan speed change rotates, satisfy the heat radiation requirement of described effective object under described first temperature, and in described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described electrical equipment fan under each described second pulse control produces when rotating.
2. control gear according to claim 1 is characterized in that, also comprises:
Judge module is used for according to judging that parameter judges whether default trigger condition is set up, and obtains a triggering judged result;
Start module, be used for when described triggering judged result indicates described default trigger condition to set up, starting described parameter acquisition module.
3. control gear according to claim 2 is characterized in that, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
4. control gear according to claim 1 is characterized in that, described parameter acquisition module specifically comprises:
Storage unit is used for the corresponding relation between memory action object temperature and the predetermined pulse width modulated ripple generation parameter;
Matching unit is used for more described Current Temperatures and described effective object temperature, obtains the first effective object temperature with described Current Temperatures coupling from the described effective object temperature of preserving in advance;
Acquiring unit is used for obtaining the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generating parameter according to the corresponding relation between described effective object temperature and the predetermined pulse width modulated ripple generation parameter.
5. control gear according to claim 4 is characterized in that, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated ripple generation parameter is a temperature range.
6. a controlling method that is used for electrical equipment fan is characterized in that, comprising:
Obtain the Current Temperatures of the effective object of described electrical equipment fan;
The first pulse duration modulation ripple that obtains described Current Temperatures correspondence generates parameter, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence comprises at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Generate parameter according to the described first pulse duration modulation ripple and generate the described first pulse duration modulation ripple;
The described first pulse duration modulation ripple is sent to described electrical equipment fan, control described electrical equipment fan speed change and rotate, satisfy the heat radiation requirement of described effective object under described Current Temperatures;
In described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described electrical equipment fan under each described second pulse control produces when rotating.
7. method according to claim 6 is characterized in that, also comprises:
Judge that according to judging parameter whether default trigger condition is set up, and obtains one and triggers judged result;
When described triggering judged result indicates described default trigger condition to set up, enter the step that the described first pulse duration modulation ripple that obtains described Current Temperatures correspondence generates parameter.
8. method according to claim 7 is characterized in that, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
9. method according to claim 6 is characterized in that, the described step of obtaining first pulse width modulated waveform of described Current Temperatures correspondence specifically comprises:
More described Current Temperatures and the effective object temperature of preserving are in advance obtained the first effective object temperature with described Current Temperatures coupling from described effective object temperature;
Corresponding relation according between described effective object temperature and the predetermined pulse width modulated ripple generation parameter obtains the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generates parameter.
10. method according to claim 9 is characterized in that, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform is a temperature range.
11. a computer comprises mainboard, described mainboard is provided with to be treated heat dissipation element and is used for the described heat dissipation element for the treatment of is carried out the fan of wind-cooling heat dissipating, it is characterized in that, also is provided with on the described mainboard:
Temperature transducer is used to obtain the described Current Temperatures for the treatment of heat dissipation element;
Parameter acquisition module, be used to obtain the first pulse duration modulation ripple corresponding and generate parameter with described Current Temperatures, the first pulse duration modulation ripple that the described first pulse duration modulation ripple generates the parameter correspondence includes at least two first pulses, and the pulse width difference of at least two second pulses is arranged in described two first pulses at least;
Pulse duration modulation ripple generation module is used for generating parameter according to the described first pulse duration modulation ripple and generates the described first pulse duration modulation ripple;
Transmitting module is used for the described first pulse duration modulation ripple is sent to described fan, controls described fan speed change and rotates, and satisfies the described heat radiation requirement of heat dissipation element under described Current Temperatures for the treatment of;
In described at least two second pulses, the value difference of the sense of hearing parameter of the sound that the described fan under each described second pulse control produces when rotating.
12. computer according to claim 11 is characterized in that, also comprises:
Judge module is used for according to judging that parameter judges whether default trigger condition is set up, and obtains a triggering judged result;
Start module, be used for when described triggering judged result indicates described default trigger condition to set up, starting described parameter acquisition module.
13. computer according to claim 12 is characterized in that, described judgement parameter is: described Current Temperatures and/or the current rotating speed of described fan and/or described fan current volume.
14. computer according to claim 11 is characterized in that, described pulse width modulated waveform acquisition module specifically comprises:
Storage unit is used for the corresponding relation between memory action object temperature and the predetermined pulse width modulated ripple generation parameter;
Matching unit is used for more described Current Temperatures and described effective object temperature, obtains the first effective object temperature with described Current Temperatures coupling from the described effective object temperature of preserving in advance;
Acquiring unit is used for according to the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform, obtains the described first pulse duration modulation ripple corresponding with the described first effective object temperature and generates parameter.
15. computer according to claim 14 is characterized in that, the effective object temperature in the corresponding relation between described effective object temperature and the predetermined pulse width modulated waveform is a temperature range.
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| CN102900688A (en) * | 2011-07-26 | 2013-01-30 | 技嘉科技股份有限公司 | Device and method for controlling rotation speed of fans |
| CN104597999A (en) * | 2015-02-12 | 2015-05-06 | 浪潮集团有限公司 | Heat dissipation method and device |
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| KR100595075B1 (en) * | 2003-07-14 | 2006-07-03 | 엘지전자 주식회사 | Apparatus and method for controling a fan drive in computer system |
| CN100403202C (en) * | 2003-07-28 | 2008-07-16 | 华为技术有限公司 | Fan rotating speed controlling method and apparatus |
| CN1657787A (en) * | 2004-02-21 | 2005-08-24 | 华为技术有限公司 | Method and device for control speed of fan |
| CN2888141Y (en) * | 2005-07-22 | 2007-04-11 | 富准精密工业(深圳)有限公司 | Fan employing pulse width modulation to control rotation speed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900688A (en) * | 2011-07-26 | 2013-01-30 | 技嘉科技股份有限公司 | Device and method for controlling rotation speed of fans |
| CN104597999A (en) * | 2015-02-12 | 2015-05-06 | 浪潮集团有限公司 | Heat dissipation method and device |
| CN104597999B (en) * | 2015-02-12 | 2017-10-13 | 浪潮集团有限公司 | A kind of heat dissipating method and device |
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| Publication number | Publication date |
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| CN101684823B (en) | 2012-08-22 |
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