CN110725806A - Fan rotating speed control method and device and server - Google Patents
Fan rotating speed control method and device and server Download PDFInfo
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- CN110725806A CN110725806A CN201810779873.5A CN201810779873A CN110725806A CN 110725806 A CN110725806 A CN 110725806A CN 201810779873 A CN201810779873 A CN 201810779873A CN 110725806 A CN110725806 A CN 110725806A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/206—Cooling means comprising thermal management
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Abstract
The invention provides a fan rotating speed control method, a fan rotating speed control device and a server. The method comprises the following steps: acquiring the temperature at the current moment; acquiring a target value of the fan rotating speed corresponding to the temperature at the current moment; and adjusting the fan rotating speed at the current moment according to the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment. The invention can realize the balanced control of the heat dissipation of the fan and the noise, not only ensures the basic heat dissipation effect, but also ensures the minimum and stable noise.
Description
Technical Field
The invention relates to the technical field of server heat dissipation, in particular to a method and a device for controlling the rotating speed of a fan and a server.
Background
In order to improve the heat dissipation capability, a common server usually adopts a high-power high-speed fan to dissipate heat, and meanwhile, the problem of huge noise is also brought. In order to reduce the influence of noise, server manufacturers have introduced a technology of PWM (Pulse width modulation) speed regulation of fans, and the rotation speed of the fans is regulated by PWM waves.
Currently, there are two ways to adjust the fan speed according to temperature:
mode 1: dividing the temperature into a plurality of sections, wherein each section corresponds to a rotating speed, the system reads the temperature at regular time, and when the temperature changes, looking up the table to obtain the corresponding rotating speed for adjustment.
Mode 2: the temperature and the fan speed are equally divided according to a linear algorithm, namely a coefficient is multiplied by the current temperature value to obtain a numerical value linearly related to the temperature and used as the fan speed for output.
For the mode 1, at the temperature point of the crossing interval, the fan will jump back and forth repeatedly, and the noise will jump according to the rotating speed and affect the service life of the fan. For example, the temperature is 40-50 ℃, which corresponds to 40% of the rotating speed of the fan; the temperature is 50-60 ℃, and the rotating speed of the fan is 60%. When the balance temperature point just exceeds 50 ℃, the rotating speed of the fan jumps from 40% to 60%, the temperature is reduced and returns to the range of 40-50 ℃ due to the fact that the rotating speed of the fan is increased, heat dissipation is improved, the rotating speed is reduced back to 40%, the rotating speed of the fan is reduced, heat accumulation is caused again, and the temperature rises to exceed 50 ℃. The oscillations are repeated to cause the fan noise to increase and decrease.
As for the mode 2, the relationship between the noise, the heat dissipation effect and the rotation speed of the fan is not increased linearly in fact, and particularly, the fan with more than ten thousand revolutions shows more obvious nonlinearity, when the fan reaches a certain rotation speed, the improvement of the heat dissipation effect by the same ratio increase of the rotation speed of the fan is weakened, and the noise is increased sharply. If the division is linearly equal, there are two possible consequences, one of which is that the fan is less noisy, but even if the temperature reaches an upper limit, the fan is not regulated to the maximum speed and the temperature may be out of range. Secondly, when the temperature reaches the upper limit, the fan can be adjusted to the maximum rotating speed, but the noise of the fan is too large at normal temperature.
In short, the existing fan speed control method causes uneven change of the fan speed, and the balance management of noise and heat dissipation is not ideal.
Disclosure of Invention
The fan rotating speed control method, the fan rotating speed control device and the server can realize balanced control of fan heat dissipation and noise, so that not only can the basic heat dissipation effect be ensured, but also the noise can be minimized and stabilized.
In a first aspect, the present invention provides a method for controlling a rotational speed of a fan, including:
acquiring the temperature at the current moment;
acquiring a target value of the fan rotating speed corresponding to the temperature at the current moment;
and adjusting the fan rotating speed at the current moment according to the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
Optionally, the adjusting the current fan speed according to the target value of the fan speed corresponding to the current temperature and the previous fan speed includes:
calculating the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment;
and adjusting the fan rotating speed at the current moment according to the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
Optionally, the adjusting the current fan speed according to the absolute value of the difference between the target value of the fan speed corresponding to the current temperature and the previous fan speed includes:
when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is larger than the preset value, the fan rotating speed at the current moment is adjusted to be the fan rotating speed at the previous moment, and the preset value is added or subtracted;
and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
Optionally, when the absolute value of the difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is greater than a predetermined value, adjusting the fan speed at the current time to be the fan speed at the previous time plus or minus the predetermined value includes:
when the target value of the fan rotating speed corresponding to the temperature at the current moment is larger than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the sum of the fan rotating speed at the previous moment and the preset value;
and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
In a second aspect, the present invention provides a fan rotational speed control apparatus comprising:
the first acquisition unit is used for acquiring the temperature at the current moment;
a second obtaining unit, configured to obtain a target value of the fan rotation speed corresponding to the temperature at the current time;
and the adjusting unit is used for adjusting the fan rotating speed at the current moment according to the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
Optionally, the adjusting unit includes:
the calculating module is used for calculating the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment;
and the adjusting module is used for adjusting the rotating speed of the fan at the current moment according to the absolute value of the difference value between the target value of the rotating speed of the fan corresponding to the temperature at the current moment and the rotating speed of the fan at the previous moment.
Optionally, the adjusting module is configured to adjust the current fan speed to be the fan speed at the previous moment plus or minus the predetermined value when an absolute value of a difference between a target value of the fan speed corresponding to the current temperature and the fan speed at the previous moment is greater than the predetermined value; and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
Optionally, the adjusting module is configured to, when an absolute value of a difference between the target value of the fan rotation speed corresponding to the temperature at the current time and the fan rotation speed at the previous time is greater than a predetermined value, adjust the fan rotation speed at the current time to be the sum of the fan rotation speed at the previous time and the predetermined value when the target value of the fan rotation speed corresponding to the temperature at the current time is greater than the fan rotation speed at the previous time; and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
In a third aspect, the present invention provides a server, including the above fan speed control apparatus.
The fan speed control method, the device and the server provided by the embodiment of the invention adjust the fan speed at the current moment according to the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment, when the difference value between the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment is positive and is greater than the preset value, the fan speed at the current moment is adjusted to be the sum of the fan speed at the previous moment and the preset value, when the difference value between the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment is negative and the absolute value is greater than the preset value, the fan speed at the current moment is adjusted to be the sum of the fan speed at the previous moment and the preset value, and when the absolute value of the difference value between the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment, adjusting the rotating speed of the fan at the current moment to a target value of the rotating speed of the fan corresponding to the temperature at the current moment, so that the rotating speed change of the fan tends to be smooth, and the higher the rotating speed of the fan is, the faster the air circulation is, the better the heat dissipation effect is, but the higher the noise is; on the contrary, the lower the fan rotating speed, the slower the air circulation, the worse the heat dissipation effect, and the smaller the noise, thereby realizing the balance control of the heat dissipation of the fan and the noise, ensuring the basic heat dissipation effect and enabling the noise to be minimum and stable.
Drawings
FIG. 1 is a flow chart of a method for controlling a rotational speed of a fan according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a rotational speed of a fan according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a fan speed control apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fan rotation speed control device according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for controlling a rotational speed of a fan, as shown in fig. 1, the method includes:
and S11, acquiring the temperature at the current moment.
And S12, acquiring a target value of the fan rotating speed corresponding to the temperature at the current moment.
And S13, adjusting the fan speed at the current moment according to the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment.
Specifically, calculating an absolute value of a difference between a target value of the fan rotation speed corresponding to the temperature at the current moment and the fan rotation speed at the previous moment; and adjusting the fan rotating speed at the current moment according to the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
Further, when the absolute value of the difference between the target value of the fan rotation speed corresponding to the temperature at the current moment and the fan rotation speed at the previous moment is greater than a predetermined value, adjusting the fan rotation speed at the current moment to be the fan rotation speed at the previous moment plus or minus the predetermined value; and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
Further, when the absolute value of the difference between the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment is greater than a predetermined value, and when the target value of the fan speed corresponding to the temperature at the current moment is greater than the fan speed at the previous moment, the fan speed at the current moment is adjusted to be the sum of the fan speed at the previous moment and the predetermined value; and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
The fan speed control method according to an embodiment of the present invention adjusts the fan speed at the current time according to the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time, adjusts the fan speed at the current time to be the sum of the fan speed at the previous time and the predetermined value when the difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is positive and greater than the predetermined value, adjusts the fan speed at the current time to be the sum of the fan speed at the previous time and the predetermined value when the difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is negative and the absolute value is greater than the predetermined value, and adjusts the fan speed at the current time to be the sum of the fan speed at the previous time and the predetermined value when the absolute value of the difference between the target value of the fan speed corresponding, adjusting the rotating speed of the fan at the current moment to a target value of the rotating speed of the fan corresponding to the temperature at the current moment, so that the rotating speed change of the fan tends to be smooth, and the higher the rotating speed of the fan is, the faster the air circulation is, the better the heat dissipation effect is, but the higher the noise is; on the contrary, the lower the fan rotating speed, the slower the air circulation, the worse the heat dissipation effect, and the smaller the noise, thereby realizing the balance control of the heat dissipation of the fan and the noise, ensuring the basic heat dissipation effect and enabling the noise to be minimum and stable.
The method for controlling the rotational speed of a fan according to the present invention will be described in detail with reference to the following embodiments.
The fan speed regulation principle adopted by the embodiment is to control the fan speed by changing the duty ratio of the PWM wave output to the fan. At a duty cycle of 100, the fan is operated at maximum speed, and as the duty cycle is reduced, the fan speed is gradually reduced until the fan kinetic energy is too small to overcome the resistance, and the fan is stopped, typically at a minimum duty cycle of greater than 20%. Therefore, the duty ratio is within a certain interval, such as 20% -100%, and the duty ratio and the rotating speed are in a unique linear corresponding relation.
The temperature x at the current momentnThe correspondence with the duty ratio of the PWM wave output to the fan is set as the correspondence table shown in Table 1, and the temperature x at the present time is determinednThe duty ratio of the PWM wave output to the fan and the target fan speed f (x) can be searched from the correspondence tablen) Presents a unique linear corresponding relation, thereby obtaining the target rotating speed f (x) of the fann)。
TABLE 1
As shown in FIG. 2, T is first determined0Initial rotational speed V at a time0After waiting a certain time interval, reading TnTemperature x of timenLook up T from Table 1nTemperature x of timenCorresponding target fan speed f (x)n) Calculating f (x)n) And Tn-1Instantaneous fan speed Vn-1Whether the absolute value of the difference is greater than a preset step value △ S is judged, and if the absolute value of the difference is greater than a preset step value △ S, the current rotating speed V is obtainedn＝Vn-1+ ± △ S, specifically, when f (x)n)>Vn-1When f (x) is addedn)<Vn-1Subtracting the current rotation speed V if the absolute value of the difference is less than or equal to the preset step value △ Sn＝f(xn). At the next moment, the fan rotating speed at the current moment is determined in the same way, so that the temperature at the current moment can approach to the equilibrium temperature point at a certain speed in the change process.
For example: the temperature changes at times T0 to T12 are shown in table 2, and the fan speed adjustment results according to the fan speed control method of the present embodiment are shown in table 2 (the maximum fan adjustment step is 5):
TABLE 2
In this embodiment, the temperature changes back and forth at the stage T2-T3-T4-T5-T6, the rotation speed corresponding to the fan increases steadily, the follow-up rotation speed oscillation does not occur, and the change of the rotation speed of the fan required by the temperature change from T6 to T7 is large.
An embodiment of the present invention further provides a fan rotation speed control apparatus, as shown in fig. 3, the apparatus includes:
a first obtaining unit 11, configured to obtain a temperature at a current time;
a second obtaining unit 12, configured to obtain a target value of the fan rotation speed corresponding to the temperature at the current time;
and an adjusting unit 13, configured to adjust the current fan speed according to the target value of the fan speed corresponding to the current temperature and the previous fan speed.
Optionally, as shown in fig. 4, the adjusting unit 13 includes:
a calculating module 131, configured to calculate an absolute value of a difference between a target value of the fan rotation speed corresponding to the temperature at the current time and the fan rotation speed at the previous time;
the adjusting module 132 is configured to adjust the fan speed at the current moment according to an absolute value of a difference between the target value of the fan speed corresponding to the temperature at the current moment and the fan speed at the previous moment.
Optionally, the adjusting module 132 is configured to adjust the current fan speed to be equal to or less than the predetermined value when an absolute value of a difference between the target value of the fan speed corresponding to the current temperature and the previous fan speed is greater than the predetermined value; and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
Optionally, the adjusting module 132 is configured to, when an absolute value of a difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is greater than a predetermined value, adjust the fan speed at the current time to be the sum of the fan speed at the previous time and the predetermined value when the target value of the fan speed corresponding to the temperature at the current time is greater than the fan speed at the previous time; and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
The fan rotation speed control device according to an embodiment of the present invention adjusts the fan rotation speed at the current time according to the target value of the fan rotation speed corresponding to the temperature at the current time and the fan rotation speed at the previous time, adjusts the fan rotation speed at the current time to be the sum of the fan rotation speed at the previous time and the predetermined value when the difference between the target value of the fan rotation speed corresponding to the temperature at the current time and the fan rotation speed at the previous time is positive and greater than the predetermined value, adjusts the fan rotation speed at the current time to be the sum of the fan rotation speed at the previous time and the predetermined value when the difference between the target value of the fan rotation speed corresponding to the temperature at the current time and the fan rotation speed at the previous time is negative and has an absolute value greater than the predetermined value, and adjusts the fan rotation speed at the current time to be the sum of the predetermined value and the absolute value of the difference between the target value, adjusting the rotating speed of the fan at the current moment to a target value of the rotating speed of the fan corresponding to the temperature at the current moment, so that the rotating speed change of the fan tends to be smooth, and the higher the rotating speed of the fan is, the faster the air circulation is, the better the heat dissipation effect is, but the higher the noise is; on the contrary, the lower the fan rotating speed, the slower the air circulation, the worse the heat dissipation effect, and the smaller the noise, thereby realizing the balance control of the heat dissipation of the fan and the noise, ensuring the basic heat dissipation effect and enabling the noise to be minimum and stable.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides a server which comprises the fan rotating speed control device.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method of controlling a rotational speed of a fan, comprising:
acquiring the temperature at the current moment;
acquiring a target value of the fan rotating speed corresponding to the temperature at the current moment;
and adjusting the fan rotating speed at the current moment according to the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
2. The method of claim 1, wherein the adjusting the current fan speed according to the target value of the fan speed corresponding to the current temperature and the previous fan speed comprises:
calculating the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment;
and adjusting the fan rotating speed at the current moment according to the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
3. The method of claim 2, wherein the adjusting the current fan speed according to the absolute value of the difference between the target value of the fan speed corresponding to the current temperature and the previous fan speed comprises:
when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is larger than the preset value, the fan rotating speed at the current moment is adjusted to be the fan rotating speed at the previous moment, and the preset value is added or subtracted;
and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
4. The method of claim 3, wherein when the absolute value of the difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is greater than a predetermined value, adjusting the fan speed at the current time to the fan speed at the previous time plus or minus the predetermined value comprises:
when the target value of the fan rotating speed corresponding to the temperature at the current moment is larger than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the sum of the fan rotating speed at the previous moment and the preset value;
and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
5. A fan speed control apparatus, comprising:
the first acquisition unit is used for acquiring the temperature at the current moment;
a second obtaining unit, configured to obtain a target value of the fan rotation speed corresponding to the temperature at the current time;
and the adjusting unit is used for adjusting the fan rotating speed at the current moment according to the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment.
6. The apparatus of claim 5, wherein the adjusting unit comprises:
the calculating module is used for calculating the absolute value of the difference value between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment;
and the adjusting module is used for adjusting the rotating speed of the fan at the current moment according to the absolute value of the difference value between the target value of the rotating speed of the fan corresponding to the temperature at the current moment and the rotating speed of the fan at the previous moment.
7. The apparatus of claim 6, wherein the adjusting module is configured to adjust the current fan speed to be the previous fan speed plus or minus the predetermined value when an absolute value of a difference between a target value of the fan speed corresponding to the current temperature and the previous fan speed is greater than the predetermined value; and when the absolute value of the difference between the target value of the fan rotating speed corresponding to the temperature at the current moment and the fan rotating speed at the previous moment is less than or equal to a preset value, adjusting the fan rotating speed at the current moment to the target value of the fan rotating speed corresponding to the temperature at the current moment.
8. The apparatus according to claim 7, wherein the adjusting module is configured to, when an absolute value of a difference between the target value of the fan speed corresponding to the temperature at the current time and the fan speed at the previous time is greater than a predetermined value, adjust the fan speed at the current time to be the sum of the fan speed at the previous time and the predetermined value when the target value of the fan speed corresponding to the temperature at the current time is greater than the fan speed at the previous time; and when the target value of the fan rotating speed corresponding to the temperature at the current moment is smaller than the fan rotating speed at the previous moment, adjusting the fan rotating speed at the current moment to be the value obtained by subtracting the preset value from the fan rotating speed at the previous moment.
9. A server, characterized in that the server comprises a fan speed control apparatus according to any one of claims 5 to 8.
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| WO2023040165A1 (en) * | 2021-09-14 | 2023-03-23 | 苏州浪潮智能科技有限公司 | Method for controlling rotational speed of server fan, apparatus, device, and medium |
| CN114576186A (en) * | 2022-03-15 | 2022-06-03 | 浪潮商用机器有限公司 | Fan speed regulation and control method and related assembly |
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