CN113048092A - Fan rotating speed self-adaption method and device - Google Patents
Fan rotating speed self-adaption method and device Download PDFInfo
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- CN113048092A CN113048092A CN202110503954.4A CN202110503954A CN113048092A CN 113048092 A CN113048092 A CN 113048092A CN 202110503954 A CN202110503954 A CN 202110503954A CN 113048092 A CN113048092 A CN 113048092A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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Abstract
The invention discloses a method and a device for self-adapting the rotating speed of a fan, wherein the method comprises the following steps: acquiring actual detection temperatures of a region to be radiated in a previous preset period and a current preset period; according to the actual detection temperature, obtaining the temperature increase rate of the area to be radiated in two continuous preset periods; and adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detected temperature and the current temperature increasing speed of the current preset period, so that the temperature of the area to be cooled in the next preset period converges to a preset temperature range, wherein the numerical value of the first rotating speed adjusting step length is greater than the numerical value of the second rotating speed adjusting step length. According to the temperature change trend of the area to be cooled of the information system, the rotating speed of the fan is adjusted by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length, the temperature is controlled within a preset range, the accurate heat generation speed of the information system by the rotating speed of the fan is achieved, the noise of a cooling module is reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of heat dissipation control, in particular to a method and a device for self-adapting of the rotating speed of a fan.
Background
Fans are common components used for heat dissipation in information systems. Generally, the higher the rotation speed of the fan, the faster the heat dissipation speed, and the higher the noise and power consumption of the fan, the shorter the service life. To resolve this conflict, information systems typically provide fans with means for automatically controlling the speed of rotation.
The existing fan speed control method generally divides the fan speed and temperature into several grades, and each grade of temperature corresponds to one grade of fan speed. For example, the fan speed is divided into 4 grades from 0 to 3, and the temperature space is divided into 4 sections, i.e. 4 grades, from 40 degrees, 60 degrees and 80 degrees. The fan speed below 40 degrees is 0 gear, the speed between [40,60) degrees is 1 gear, the speed between [60,80) degrees is 2 gears, and the speed of 80 degrees and above is 3 gears.
The speed of the fan for dissipating heat at a certain preset gear generally cannot be exactly balanced with the speed of heat generation of the information system. Thus, the disadvantages of the above-mentioned fan speed control method are: firstly, the rotating speed of the fan is easy to switch back and forth between two adjacent gears, for example, when the rotating speed of the fan is divided into 4 gears, the rotating speed can be switched between two gears with a difference of 33%, and the noise can also be greatly changed; secondly, the actual rotating speed of each gear of the fan is lower and lower under the influence of factors such as dust and the like, so that the heat generating and radiating balance temperature of the information system is higher and higher, and the service life of the core of the information system is shortened.
Disclosure of Invention
The invention aims to provide a fan rotating speed self-adaption method and a fan rotating speed self-adaption device.
In order to solve the above technical problem, a first aspect of an embodiment of the present invention provides a method for adapting a rotation speed of a fan, including the following steps:
acquiring actual detection temperatures of a region to be radiated in a previous preset period and a current preset period;
according to the actual detection temperature, obtaining the temperature increase rate of the area to be radiated in two continuous preset periods;
and adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detection temperature and the current temperature increase of the current preset period, so that the temperature of the area to be cooled in the next preset period is converged to a preset temperature interval, wherein the value of the first rotating speed adjusting step length is greater than that of the second rotating speed adjusting step length.
Further, the increasing the speed according to the actual detected temperature and the current temperature in the current preset period and combining the first speed adjustment step length and the second speed adjustment step length to adjust the rotating speed of the fan includes:
when the actual detection temperature of the current preset period is larger than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length;
when the actual detection temperature of the current preset period is within the preset temperature range, adjusting the rotating speed of the fan or keeping the rotating speed of the fan according to the second rotating speed adjusting step length;
and when the actual detection temperature of the current preset period is smaller than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length.
Further, when the actual detected temperature of the current preset period is greater than the preset temperature interval, increasing the rotation speed of the fan or maintaining the rotation speed of the fan by combining the first rotation speed adjustment step length and the second rotation speed adjustment step length includes:
when the actual detection temperature is increased, increasing the rotating speed of the fan according to the first rotating speed adjusting step length;
when the actual detection temperature is reduced and the reduction speed is slow, the rotating speed of the fan is increased according to the second rotating speed adjusting step length, wherein the slow reduction speed satisfies the following formula:
(Tmax - Ci) /△Ci-1 >= N ；
namely, it is
Ci + N△Ci-1 >= Tmax；
When the actual detection temperature is reduced and the reduction speed is fast, the rotating speed of the fan is kept, and the situation that the reduction speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmax；
Wherein, TmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
Further, when the actual detected temperature of the current preset period is within the preset temperature interval, adjusting the rotation speed of the fan or maintaining the rotation speed of the fan according to the second rotation speed adjustment step length includes:
when the actual detection temperature rises and the rising speed is fast, the rotating speed of the fan is increased according to the second rotating speed adjusting step length, and the situation that the rising speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmax；
Maintaining the rotation speed of the fan when the actual detected temperature increases and the increasing speed is slow or when the actual detected temperature decreases and the decreasing speed is slow;
when the actual detection temperature is reduced and the reduction speed is fast, reducing the rotation speed of the fan according to the second rotation speed adjusting step length, wherein the situation of fast reduction speed meets the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmin；
Wherein, TminIs the minimum value, T, of the preset temperature intervalmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
Further, when the actual detected temperature of the current preset period is smaller than the preset temperature interval, and the first speed adjustment step length and the second speed adjustment step length are combined to increase the rotation speed of the fan or maintain the rotation speed of the fan, the method includes:
when the actual detection temperature rises and the rising speed is fast, the rotating speed of the fan is kept, and the situation that the rising speed is fast meets the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmin；
When the actual detection temperature is increased and the increasing speed is slow, reducing the rotating speed of the fan according to the second rotating speed adjusting step length, wherein the condition that the increasing speed is slow meets the following formula:
(Tmin - Ci) /△Ci-1 >= N ；
namely, it is
Ci + N△Ci-1 <= Tmin；
When the actual detection temperature is reduced, reducing the rotating speed of the fan according to the first rotating speed adjusting step length;
wherein, TminIs the minimum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
Accordingly, a second aspect of the embodiments of the present invention provides a fan speed adaptive device, including:
the acquiring module is used for acquiring actual detection temperatures of the area to be radiated in a previous preset period and a current preset period;
the calculation module is used for obtaining the temperature increase rate of the area to be radiated in two continuous preset periods according to the actual detection temperature;
and the control module is used for adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detection temperature and the current temperature increasing speed of the current preset period, so that the temperature of the area to be cooled in the next preset period is converged to a preset temperature interval, wherein the value of the first rotating speed adjusting step length is greater than that of the second rotating speed adjusting step length.
Further, the control module includes: a first control submodule, a second control submodule and a third control submodule;
the first control submodule is used for increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length when the actual detected temperature of the current preset period is larger than the preset temperature interval;
the second control submodule is used for adjusting the rotating speed of the fan or keeping the rotating speed of the fan according to the second rotating speed adjusting step length when the actual detected temperature of the current preset period is in the preset temperature interval;
and the third control sub-module is used for combining the first rotating speed adjusting step length and the second rotating speed adjusting step length to increase the rotating speed of the fan or maintain the rotating speed of the fan when the actual detected temperature of the current preset period is smaller than the preset temperature interval.
Further, the first control sub-module includes: a first control unit, a second control unit and a third control unit;
the first control unit is used for increasing the rotating speed of the fan according to the first rotating speed adjusting step length when the actual detection temperature is increased;
the second control unit is used for increasing the rotating speed of the fan according to the second rotating speed adjusting step length when the actual detection temperature is reduced and the reduction speed is slow, wherein the slow reduction speed satisfies the following formula:
(Tmax - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 >= Tmax；
The third control unit is used for keeping the rotating speed of the fan when the actual detected temperature is reduced and the reduction speed is fast, and the situation that the reduction speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmax；
Wherein, TmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
Further, the second control sub-module includes: a fourth control unit, a fifth control unit and a sixth control unit;
the fourth control unit is configured to increase the rotation speed of the fan according to the second rotation speed adjustment step length when the actual detected temperature increases and the increase speed is fast, where the increase speed is fast and satisfies the following equation:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmax；
The fifth control unit is used for keeping the rotating speed of the fan when the actual detection temperature is increased and the increasing speed is slower or when the actual detection temperature is reduced and the decreasing speed is slower;
the sixth control unit is configured to reduce the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature is reduced and the reduction speed is fast, where the situation that the reduction speed is fast satisfies the following equation:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmin；
Wherein, TminIs the minimum value, T, of the preset temperature intervalmaxIs the maximum value of the preset temperature intervalN is a predetermined constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
Further, the third control sub-module comprises: a seventh control unit, an eighth control unit, and a ninth control unit;
the seventh control unit is configured to maintain the rotation speed of the fan when the actual detected temperature increases and the increase speed is fast, where the increase speed is fast and satisfies the following equation:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmin；
The eighth control unit is configured to decrease the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature increases and the increase speed is slow, where the increase speed is slow and satisfies the following equation:
(Tmin - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 <= Tmin；
The ninth control unit is used for reducing the rotating speed of the fan according to the first rotating speed adjusting step length when the actual detected temperature is reduced;
wherein, TminIs the minimum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
The technical scheme of the embodiment of the invention has the following beneficial technical effects:
according to the temperature change trend of the area to be cooled of the information system, the rotating speed of the fan is reasonably adjusted by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length so as to control the temperature of the area to be cooled within a preset temperature range, the accurate heat generation speed of the fan to the information system is realized, the noise of a cooling module is reduced, and the service life of the information system is prolonged.
Drawings
FIG. 1 is a flow chart of a method for adapting a fan speed according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a method for adapting a fan speed according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fan speed control strategy according to an embodiment of the present invention;
FIG. 4 is a block diagram of a fan speed adaptive device provided in an embodiment of the present invention;
FIG. 5 is a block diagram of a control module provided by an embodiment of the present invention;
FIG. 6 is a block diagram of a first control sub-module provided by an embodiment of the invention;
FIG. 7 is a block diagram of a second control sub-module provided by the embodiments of the present invention;
fig. 8 is a block diagram of a third control sub-module provided in the embodiment of the present invention.
Reference numerals:
1. the device comprises an acquisition module, 2, a calculation module, 3, a control module, 31, a first control submodule, 311, a first control unit, 312, a second control unit, 313, a third control unit, 32, a second control submodule, 321, a fourth control unit, 322, a fifth control unit, 323, a sixth control unit, 33, a third control submodule, 331, a seventh control unit, 332, an eighth control unit, 333 and a ninth control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Fig. 1 is a flow chart of a method for adapting a rotational speed of a fan according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a principle of a fan speed adaptive method according to an embodiment of the present invention.
Referring to fig. 1 and fig. 2, a first aspect of an embodiment of the present invention provides a method for adapting a rotation speed of a fan, including the following steps:
s100, acquiring actual detection temperatures of the area to be radiated in a previous preset period and a current preset period.
And S200, obtaining the temperature increase rate of the area to be radiated in two continuous preset periods according to the actual detected temperature.
S300, according to the actual detected temperature and the current temperature increase of the current preset period, combining a first rotating speed adjusting step length and a second rotating speed adjusting step length to adjust the rotating speed of the fan, so that the temperature of the area to be cooled in the next preset period converges to a preset temperature range, wherein the numerical value of the first rotating speed adjusting step length is larger than the numerical value of the second rotating speed adjusting step length.
In the above method for self-adapting the fan speed, the fan speed RiExpressed in thousandths of a cycle as the PWM duty cycle output to the fan. Namely RiIs in the range of 0 to 1000.
Specifically, the fan speed adjustment adopts two-stage geometric steps of a first speed adjustment step (i.e., fast) and a second speed adjustment step (i.e., slow). Roughly speaking, if the deviation from the current temperature to the target temperature is large, the rotating speed of the fan is increased or decreased by a large proportion according to the fast step length; if the deviation from the current temperature to the target temperature is small, the rotating speed of the fan is increased or decreased by a small proportion according to the slow step length.
TABLE 1
| Fan speed step ratio | Slow | Fast |
| IncreaseSpeed | 279/250 | 253/200 |
| |
9/10 | 79/100 |
In a specific implementation of the embodiment of the present invention, the Slow and fast step sizes are shown in table 1. The fast step size is selected so that the fan speed can be increased from the lowest speed to the highest speed and decreased from the highest speed to the lowest speed up to 8 times. The slow step is selected such that the fan speed is increased from the lowest speed to the highest speed and decreased from the highest speed to the lowest speed up to 16 times. Meanwhile, the fan rotating speed R is combined by slow and fast step lengths in the tableiCan be adjusted to any value within a value range, so that the rotating speed of the fan can be accurately matched with the heat dissipation requirement of the system.
FIG. 3 is a schematic diagram of a fan speed control strategy according to an embodiment of the present invention.
Specifically, referring to fig. 3, adjusting the rotation speed of the fan according to the actual detected temperature and the current temperature increase of the current preset period and combining the first rotation speed adjustment step length and the second rotation speed adjustment step length includes:
and S310, if the actual detection temperature of the current preset period is greater than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length.
And S320, if the actual detection temperature of the current preset period is within the preset temperature interval, adjusting the rotating speed of the fan or keeping the rotating speed of the fan according to the second rotating speed adjusting step length.
And S330, if the actual detection temperature of the current preset period is smaller than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length.
Further, in step S310, if the actual detected temperature of the current preset period is greater than the preset temperature interval, increasing the rotation speed of the fan or maintaining the rotation speed of the fan by combining the first rotation speed adjustment step length and the second rotation speed adjustment step length includes:
and S311, when the actual detection temperature is increased, increasing the rotating speed of the fan according to the first rotating speed adjusting step length.
And S312, when the actual detected temperature is reduced and the reduction speed is slow, increasing the rotating speed of the fan according to the second rotating speed adjusting step length.
And S313, when the actual detected temperature is reduced and the reduction speed is high, maintaining the rotation speed of the fan.
Further, in step S320, if the actual detected temperature of the current preset period is within the preset temperature interval, adjusting the rotation speed of the fan or maintaining the rotation speed of the fan according to the second rotation speed adjustment step includes:
and S321, when the actual detected temperature rises and the rising speed is high, increasing the rotating speed of the fan according to the second rotating speed adjusting step length.
S322, when the actual detected temperature rises and the rising speed is slow or when the actual detected temperature falls and the falling speed is slow, maintaining the rotation speed of the fan.
And S323, when the actual detected temperature is reduced and the reduction speed is higher, reducing the rotation speed of the fan according to a second rotation speed adjusting step length.
Further, in step S330, if the actual detected temperature of the current preset period is smaller than the preset temperature interval and the first speed adjustment step and the second speed adjustment step are combined to increase the rotation speed of the fan or maintain the rotation speed of the fan, the method includes:
and S331, when the actual detection temperature rises and the rising speed is high, keeping the rotating speed of the fan.
And S332, when the actual detected temperature is increased and the increasing speed is slow, reducing the rotating speed of the fan according to a second rotating speed adjusting step.
And S333, when the actual detected temperature is reduced, reducing the rotating speed of the fan according to the first rotating speed adjusting step length.
As shown in FIG. 3, Ci*△Ci-1The plane is divided into 9 regions: details of fan speedThe strategy is as follows:
the method comprises the following steps: the current temperature exceeds T +1 and the temperature is increasing. The fan speed is increased by fast steps (mark + + +).
Secondly, the step of: the current temperature exceeds T +1, the temperature is decreasing and the ramp down is slower. The fan speed is increased in slow steps (marker +).
③: the current temperature exceeds T +1, the temperature is decreasing and the rate of decrease is faster. Fan speed is maintained (no flag).
Fourthly, the method comprises the following steps: the current temperature is already in the target interval of [ T, T +1], and the temperature is rising and the rising speed is higher. The fan speed is increased in slow steps (marker +).
Fifthly: the current temperature is already in the [ T, T +1] target interval, the temperature is rising and rising slowly, or the temperature is falling and falling slowly. Fan speed is maintained (no flag).
Sixthly, the method comprises the following steps: the current temperature is already in the target interval of [ T, T +1], and the temperature is falling and the speed of falling is faster. The fan speed is reduced in slow steps (flag-).
Seventh, the method comprises the following steps: the current temperature is below T, the temperature is rising and the rate of rise is fast. Fan speed is maintained (no flag).
And (v): the current temperature is below T, the temperature is rising and the rate of rise is slower. The fan speed is reduced in slow steps (flag-).
Ninthly: the current temperature is below T and the temperature is decreasing. The fan speed is reduced by fast steps (mark- -).
Under the control of the fan speed control strategy of the method, the temperature of the area to be radiated may be:
1) converging to the fifth region along the spiral line. At this time, the fan rotation speed is stabilized near a certain rotation speed depending on the ambient temperature. The fan speed R is reduced along with the reduction of the actual speed after the fan is agediWill stabilize at higher values.
2) Stopping in the first two areas along the spiral line. At this time, the fan speed is stabilized at the maximum speed and cannot be reduced to the target temperature.
3) Stopping in the ninth area along the spiral. At this point the fan stops and does not rise to the target temperature.
Specifically, in a specific implementation manner of the embodiment of the present invention, in the above steps, "faster" and "slower" of "faster rising speed", "slower rising speed", "faster falling speed" and "slower falling speed", specifically, the temperature increase Δ C is referred toi-1 changesFast and slow, increase in speed Δ C according to temperaturei-1Whether or not the target temperature interval [ T, T +1] is to be entered or exited within N time units]. Where N is a predetermined constant. In particular, the present invention relates to a method for producing,
1) at present i-1Temperature below T and Δ C greater than 0When the temperature rise rate is fast, the following formula is satisfied:
(T - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > T，
Is located at Ci*△Ci-1Straight line in plane Ci + N△Ci-1Upper part of T.
2) The current temperature is lower than T and Δ Ci-1When the temperature is higher than 0, the temperature rising speed is slow, and the following formula is satisfied:
(T - Ci) /△Ci-1 >= N，
namely, it is
Ci + N△Ci-1 <= T。
3) At present i-1Temperature higher than T +1 and DeltaC less than 0When the temperature is decreased rapidly, the following formula is satisfied:
(T + 1 - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < T + 1，
Is located at Ci*△Ci-1Straight line in plane Ci + N△Ci-1Below = T + 1.
4) At present i-1Temperature higher than T +1 and DeltaC less than 0When the temperature drop speed is slow, the following formula is satisfied:
(T + 1 - Ci) /△Ci-1 >= N，
namely, it is
Ci + N△Ci-1 >= T + 1。
5) When in use i-1At a temperature of [ T, T +1]]Interval and DeltaC is greater than 0When the temperature rise rate is fast, the following formula is satisfied:
(T + 1 - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > T + 1，
Is located at Ci*△Ci-1Straight line in plane Ci + N△Ci-1Upper of = T + 1.
6) When in use i-1At a temperature of [ T, T +1]]Interval and DeltaC is less than 0When the temperature is decreased rapidly, the following formula is satisfied:
(T - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < T，
Is located at Ci*△Ci-1Straight line in plane Ci + N△Ci-1Below = T.
Further, the maximum value of the target temperature is the minimum of the maximum temperature that the system can be raised to when the fan is turned off, or the maximum temperature that the system can operate normally, at the highest ambient temperature supported by the system.
The minimum value of the target temperature is the lowest temperature that the system can drop to at the maximum speed of the fan at the lowest ambient temperature supported by the system.
The default value of the target temperature may be set to the average of the maximum value and the minimum value. The target temperature may be modified during operation. After the target temperature is modified, the fan speed regulation strategy will converge the temperature to the new target temperature interval.
According to the fan rotating speed self-adaption method, the rotating speed of the fan is adjusted by using two stages of equal-ratio step lengths, so that the rotating speed of the fan can be stabilized to one thousandth of precision, the fan is prevented from switching between two rotating speeds with large difference, and the noise of a system is greatly reduced; and through the fan rotating speed control strategy of target temperature guidance, even after the fan is aged, the system temperature is still controlled at the target temperature and cannot be continuously increased, and the service life of the information system is prolonged.
Fig. 4 is a block diagram of a fan speed adaptive device according to an embodiment of the present invention.
Accordingly, referring to fig. 4, a second aspect of the embodiments of the present invention provides a fan speed adaptive apparatus, including: the device comprises an acquisition module 1, a calculation module 2 and a control module 3. The acquiring module 1 is used for acquiring actual detection temperatures of an area to be cooled in a previous preset period and a current preset period; the calculation module 2 is used for obtaining the temperature increase rate of the area to be radiated in two continuous preset periods according to the actual detected temperature; the control module 3 is used for adjusting the rotating speed of the fan according to the actual detected temperature and the current temperature increase of the current preset period and combining the first rotating speed adjusting step length and the second rotating speed adjusting step length to make the temperature of the area to be cooled in the next preset period converge to the preset temperature range, wherein the numerical value of the first rotating speed adjusting step length is larger than that of the second rotating speed adjusting step length.
Fig. 5 is a block diagram of a control module according to an embodiment of the present invention.
Specifically, referring to fig. 5, the control module 3 includes: a first control submodule 31, a second control submodule 32 and a third control submodule 32. The first control submodule 31 is configured to, if the actual detected temperature of the current preset period is greater than the preset temperature interval, increase the rotation speed of the fan or maintain the rotation speed of the fan by combining the first rotation speed adjustment step length and the second rotation speed adjustment step length; the second control submodule 32 is configured to adjust the rotation speed of the fan or maintain the rotation speed of the fan according to a second rotation speed adjustment step length if the actual detected temperature of the current preset period is within the preset temperature interval; the third control sub-module 33 is configured to increase the rotation speed of the fan or maintain the rotation speed of the fan by combining the first rotation speed adjustment step length and the second rotation speed adjustment step length if the actual detected temperature of the current preset period is smaller than the preset temperature interval.
Fig. 6 is a block diagram of a first control sub-module according to an embodiment of the present invention.
Further, referring to fig. 6, the first control sub-module 31 includes: a first control unit 311, a second control unit 312, and a third control unit 313. Wherein, the first control unit 311 is used for increasing the rotation speed of the fan according to a first rotation speed adjusting step when the actually detected temperature is increased; the second control unit 312 is configured to increase the rotation speed of the fan according to a second rotation speed adjustment step when the actual detected temperature decreases and the reduction speed is slow; the third control unit 313 is used to maintain the rotation speed of the fan when the actually detected temperature decreases and the speed reduction is fast.
Wherein, the slow speed reduction satisfies the following formula:
(Tmax - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 >= Tmax；
The above-mentioned situation of fast speed reduction satisfies the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmax；
Wherein, TmaxIs the maximum value of a preset temperature interval, N is a preset constant, CiFor the actual detected temperature, Δ C, obtained at the i-th instanti-1The temperature increment of the actual detected temperature acquired for the ith time relative to the time i-1.
Fig. 7 is a block diagram of a second control sub-module according to an embodiment of the present invention.
Further, referring to fig. 7, the second control submodule 32 includes: a fourth control unit 321, a fifth control unit 322, and a sixth control unit 323. The fourth control unit 321 is configured to decrease the rotation speed of the fan according to the second rotation speed adjustment step when the actually detected temperature is increased and the increase speed is fast; the fifth control unit 322 is used to maintain the rotation speed of the fan when the actual detected temperature rises and the rising speed is slow or when the actual detected temperature falls and the falling speed is slow; the sixth control unit 323 is configured to decrease the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature decreases and the decrease speed is fast.
Wherein, the condition that the rising speed is fast satisfies the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmax；
The above-mentioned situation of fast speed reduction satisfies the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmin；
Wherein, TminIs the minimum value of a predetermined temperature interval, TmaxIs the maximum value of a preset temperature interval, N is a preset constant, CiFor the actual detected temperature, Δ C, obtained at the i-th instanti-1The temperature increment of the actual detected temperature acquired for the ith time relative to the time i-1.
Fig. 8 is a block diagram of a third control sub-module provided in the embodiment of the present invention.
Further, referring to fig. 8, the third control sub-module 33 includes: a seventh control unit 331, an eighth control unit 332, and a ninth control unit 333. Wherein, the seventh control unit 331 is configured to maintain the rotation speed of the fan when the actually detected temperature rises and the rising speed is fast; the eighth control unit 332 is configured to decrease the rotation speed of the fan according to the second rotation speed adjustment step when the actually detected temperature increases and the increase speed is slow; the ninth control unit 333 is adapted to decreasing the rotation speed of the fan in first rotation speed adjustment steps when the actually detected temperature decreases.
Wherein, the condition that the rising speed is fast satisfies the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmin；
The above-described case where the rising speed is slow satisfies the following expression:
(Tmin - Ci) /△Ci-1 >= N，
namely, it is
Ci + N△Ci-1 <= Tmin；
Wherein, TminIs the minimum value of the preset temperature interval,n is a predetermined constant, CiFor the actual detected temperature, Δ C, obtained at the i-th instanti-1The temperature increment of the actual detected temperature acquired for the ith time relative to the time i-1.
The fan rotating speed self-adaptive device adjusts the rotating speed of the fan by using two-stage equal ratio step length, so that the rotating speed of the fan can be stabilized to one thousandth of precision, the fan is prevented from switching between two rotating speeds with large difference, and the noise of a system is greatly reduced; and through the fan rotating speed control strategy of target temperature guidance, even after the fan is aged, the system temperature is still controlled at the target temperature and cannot be continuously increased, and the service life of the information system is prolonged.
Accordingly, a third aspect of the embodiments of the present invention further provides an electronic device, including: at least one processor; and a memory coupled to the at least one processor; the memory stores instructions executable by a processor, and the instructions are executed by the processor to enable at least one processor to execute the fan rotating speed self-adaption method.
Furthermore, a fourth aspect of the embodiments of the present invention also provides a computer-readable storage medium, on which computer instructions are stored, and the instructions, when executed by a processor, implement the above-mentioned fan speed adaptive method.
The embodiment of the invention aims to protect a fan rotating speed self-adaptive method and a device, wherein the method comprises the following steps: acquiring actual detection temperatures of a region to be radiated in a previous preset period and a current preset period; according to the actual detection temperature, obtaining the temperature increase rate of the area to be radiated in two continuous preset periods; and adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detected temperature and the current temperature increasing speed of the current preset period, so that the temperature of the area to be cooled in the next preset period converges to a preset temperature range, wherein the numerical value of the first rotating speed adjusting step length is greater than the numerical value of the second rotating speed adjusting step length. The technical scheme has the following effects:
according to the temperature change trend of the area to be cooled of the information system, the rotating speed of the fan is reasonably adjusted by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length so as to control the temperature of the area to be cooled within a preset temperature range, the accurate tracking of the rotating speed of the fan on the heat generating speed of the information system is realized, the noise of a cooling module is reduced, and the service life of the information system is prolonged.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A fan rotating speed self-adaptive method is characterized by comprising the following steps:
acquiring actual detection temperatures of a region to be radiated in a previous preset period and a current preset period;
according to the actual detection temperature, obtaining the temperature increase rate of the area to be radiated in two continuous preset periods;
and adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detection temperature and the current temperature increase of the current preset period, so that the temperature of the area to be cooled in the next preset period is converged to a preset temperature interval, wherein the value of the first rotating speed adjusting step length is greater than that of the second rotating speed adjusting step length.
2. The method for adapting the rotation speed of a fan according to claim 1, wherein the adjusting the rotation speed of the fan according to the actual detected temperature and the current temperature increase of the current preset period and combining a first rotation speed adjustment step size and a second rotation speed adjustment step size comprises:
when the actual detection temperature of the current preset period is larger than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length;
when the actual detection temperature of the current preset period is within the preset temperature range, adjusting the rotating speed of the fan or keeping the rotating speed of the fan according to the second rotating speed adjusting step length;
and when the actual detection temperature of the current preset period is smaller than the preset temperature interval, increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length.
3. The method of claim 2, wherein the increasing the rotation speed of the fan or maintaining the rotation speed of the fan when the actual detected temperature of the current preset period is greater than the preset temperature interval in combination with the first and second rotation speed adjustment steps comprises:
when the actual detection temperature is increased, increasing the rotating speed of the fan according to the first rotating speed adjusting step length;
when the actual detection temperature is reduced and the reduction speed is slow, the rotation speed of the fan is increased according to the second rotation speed adjusting step length, and the condition that the reduction speed is slow meets the following formula:
(Tmax - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 >= Tmax；
When the actual detection temperature is reduced and the reduction speed is fast, the rotating speed of the fan is kept, and the situation that the reduction speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmax；
Wherein, TmaxIs the maximum value of the preset temperature intervalN is a predetermined constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
4. The method of claim 2, wherein the adjusting the rotation speed of the fan or maintaining the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature of the current preset period is within the preset temperature interval comprises:
when the actual detection temperature rises and the rising speed is fast, the rotating speed of the fan is increased according to the second rotating speed adjusting step length, and the situation that the rising speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmax；
Maintaining the rotation speed of the fan when the actual detected temperature increases and the increasing speed is slow or when the actual detected temperature decreases and the decreasing speed is slow;
when the actual detection temperature is reduced and the reduction speed is fast, reducing the rotation speed of the fan according to the second rotation speed adjusting step length, wherein the situation of fast reduction speed meets the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmin；
Wherein, TminIs the minimum value, T, of the preset temperature intervalmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
5. The method of claim 2, wherein the increasing the rotation speed of the fan or maintaining the rotation speed of the fan when the actual detected temperature of the current preset period is less than the preset temperature interval and the first and second rotation speed adjustment steps are combined, comprises:
when the actual detection temperature rises and the rising speed is fast, the rotating speed of the fan is kept, and the situation that the rising speed is fast meets the following formula:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmin；
When the actual detection temperature is increased and the speed is increased slowly, the rotating speed of the fan is reduced according to the second rotating speed adjusting step length, and the condition that the speed is increased slowly meets the following formula:
(Tmin - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 <= Tmin；
When the actual detection temperature is reduced, reducing the rotating speed of the fan according to the first rotating speed adjusting step length;
wherein, TminIs the minimum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
6. A fan speed adaptive device, comprising:
the acquiring module is used for acquiring actual detection temperatures of the area to be radiated in a previous preset period and a current preset period;
the calculation module is used for obtaining the temperature increase rate of the area to be radiated in two continuous preset periods according to the actual detection temperature;
and the control module is used for adjusting the rotating speed of the fan by combining a first rotating speed adjusting step length and a second rotating speed adjusting step length according to the actual detection temperature and the current temperature increasing speed of the current preset period, so that the temperature of the area to be cooled in the next preset period is converged to a preset temperature interval, wherein the value of the first rotating speed adjusting step length is greater than that of the second rotating speed adjusting step length.
7. The fan speed adaptation system of claim 6,
the control module includes: a first control submodule, a second control submodule and a third control submodule;
the first control submodule is used for increasing the rotating speed of the fan or keeping the rotating speed of the fan by combining the first rotating speed adjusting step length and the second rotating speed adjusting step length when the actual detected temperature of the current preset period is larger than the preset temperature interval;
the second control submodule is used for adjusting the rotating speed of the fan or keeping the rotating speed of the fan according to the second rotating speed adjusting step length when the actual detected temperature of the current preset period is in the preset temperature interval;
and the third control sub-module is used for combining the first rotating speed adjusting step length and the second rotating speed adjusting step length to increase the rotating speed of the fan or maintain the rotating speed of the fan when the actual detected temperature of the current preset period is smaller than the preset temperature interval.
8. The fan speed adaptation system of claim 7,
the first control sub-module includes: a first control unit, a second control unit and a third control unit;
the first control unit is used for increasing the rotating speed of the fan according to the first rotating speed adjusting step length when the actual detection temperature is increased;
the second control unit is used for adjusting the step length according to the second rotating speed to increase the rotating speed of the fan when the actual detection temperature is reduced and the reduction speed is slow, and the slow reduction speed satisfies the following formula:
(Tmax - Ci) /△Ci-1 >= N；
namely, it is
Ci + N△Ci-1 >= Tmax；
The third control unit is used for keeping the rotating speed of the fan when the actual detected temperature is reduced and the reduction speed is fast, and the situation that the reduction speed is fast meets the following formula:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmax；
Wherein, TmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
9. The fan speed adaptation system of claim 7,
the second control sub-module includes: a fourth control unit, a fifth control unit and a sixth control unit;
the fourth control unit is configured to increase the rotation speed of the fan according to the second rotation speed adjustment step length when the actual detected temperature increases and the increase speed is fast, where the increase speed is fast and satisfies the following equation:
(Tmax - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmax；
The fifth control unit is used for keeping the rotating speed of the fan when the actual detection temperature is increased and the increasing speed is slower or when the actual detection temperature is reduced and the decreasing speed is slower;
the sixth control unit is configured to reduce the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature is reduced and the reduction speed is fast, where the situation that the reduction speed is fast satisfies the following equation:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 < Tmin；
Wherein, TminIs the minimum value, T, of the preset temperature intervalmaxIs the maximum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
10. The fan speed adaptation system of claim 7,
the third control sub-module comprises: a seventh control unit, an eighth control unit, and a ninth control unit;
the seventh control unit is configured to maintain the rotation speed of the fan when the actual detected temperature increases and the increase speed is fast, where the increase speed is fast and satisfies the following equation:
(Tmin - Ci) /△Ci-1 < N，
namely, it is
Ci + N△Ci-1 > Tmin；
The eighth control unit is configured to decrease the rotation speed of the fan according to the second rotation speed adjustment step when the actual detected temperature increases and the increase speed is slow, where the increase speed is slow and satisfies the following equation:
(Tmin - Ci) /△Ci-1 >= N ；
namely, it is
Ci + N△Ci-1 <= Tmin；
The ninth control unit is used for reducing the rotating speed of the fan according to the first rotating speed adjusting step length when the actual detected temperature is reduced;
wherein, TminIs the minimum value of the preset temperature interval, N is a preset constant, CiFor the actual detection temperature, Δ C, obtained at the i-th instanti-1And the temperature increment of the actual detected temperature acquired at the ith moment relative to the i-1 moment is obtained.
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