CN112460059A - Fan noise control method and device, terminal equipment and storage medium - Google Patents
Fan noise control method and device, terminal equipment and storage medium Download PDFInfo
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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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
Abstract
The invention discloses a fan noise control method, a fan noise control device, terminal equipment and a storage medium, wherein the method comprises the following steps: obtaining the speed-adjusting data after the fan is started; determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data; and when the callback rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the callback rotation speed data to preset target rotation speed data, and operating according to the target rotation speed data. According to the invention, when the callback rotation speed data meets the noise reduction condition, the callback rotation speed data is used as the rotation speed callback node, so that the speed is recalled when the rotation speed of the fan reaches the callback rotation speed data, the rotation speed of the fan is adjusted from the callback rotation speed data to the target rotation speed data, and the fan moves according to the target rotation speed data, so that the noise generated by the fan is avoided.
Description
Technical Field
The invention relates to the technical field of fan noise control, in particular to a fan noise control method, a fan noise control device, terminal equipment and a storage medium.
Background
After the fan is started, in order to quickly reach a preset target rotating speed, high-frequency output is generally performed in the initial starting stage so as to increase the rotating speed. When the rotating speed of the fan reaches the target rotating speed, the output is reduced to reduce the rotating speed, so that the rotating speed of the fan tends to be stable. In the prior art, in order to avoid speed delay, the speed generally drops rapidly after the rotating speed overshoots (namely, the rotating speed is greater than the target rotating speed), and the rotating speed overshooting amplitude is large due to high-frequency output when the fan is started, so that the speed changes rapidly when the speed is adjusted back, and noise is easy to generate.
Accordingly, there is a need in the art for improvements.
Disclosure of Invention
The present invention provides a method, an apparatus, a terminal device and a storage medium for controlling fan noise, which aim to solve the problem that the fan in the prior art has a large overshoot amplitude of the rotation speed due to high frequency output when starting, so that the speed changes rapidly when the speed is adjusted back, and noise is easily generated.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a fan noise control method, wherein the method includes:
obtaining the speed-adjusting data after the fan is started;
determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data;
and when the callback rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the callback rotation speed data to preset target rotation speed data, and operating according to the target rotation speed data.
In one implementation, the obtaining of the callback rotational speed data after the fan is started includes:
after the fan is started, judging whether the fan is started for the first time;
and if the fan is not started for the first time, obtaining the callback rotation speed data meeting the noise reduction condition before the last shutdown of the fan, and taking the rotation speed of the rotation speed callback before the last shutdown of the fan as the callback rotation speed data.
In one implementation, the determining whether the rotation speed data meets the noise reduction condition according to the rotation speed data includes:
acquiring the rotating speed peak data of the fan, wherein the rotation speed peak data is adjusted back to be smaller than the rotating speed peak data;
comparing the rotating speed peak value data with the readjusted rotating speed data to obtain rotating speed difference data;
and determining whether the callback rotating speed data meets the noise reduction condition or not according to the rotating speed difference data.
In one implementation, the noise reduction condition is that the rotation speed difference is greater than or equal to a preset difference threshold.
In one implementation, when the tuning-back rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the tuning-back rotation speed data to a preset target rotation speed data, and operating with the preset target rotation speed data includes:
when the callback rotational speed data meets the noise reduction condition, acquiring real-time rotational speed data of the fan;
when the real-time rotating speed data of the fan is larger than or equal to the callback rotating speed data, controlling the fan to reduce the speed so that the real-time rotating speed data of the fan is reduced to the target rotating speed data, and operating with the target rotating speed data;
and if the fan is started for the first time, acquiring a preset initial value, and taking the initial value as the callback rotation speed data.
In one implementation, the method further comprises:
when the callback rotational speed data does not meet the noise reduction condition, reducing the callback rotational speed data to obtain reduced callback rotational speed data;
determining whether the reduced callback rotational speed data meets the noise reduction condition according to the reduced callback rotational speed data,
and when the reduced callback rotating speed data meets the noise reduction condition, adjusting the rotating speed of the fan from the reduced callback rotating speed data to the target rotating speed data, and operating with the target rotating speed data.
In one implementation, when the callback rotational speed data does not satisfy the noise reduction condition, reducing the callback rotational speed data to obtain reduced callback rotational speed data includes:
when the callback rotational speed data does not meet the noise reduction condition, acquiring a rotational speed derating value, wherein the rotational speed derating value is used for measuring the reduction amplitude of the callback rotational speed data;
and reducing the callback rotation speed data according to the rotation speed derating value to obtain the reduced callback rotation speed data.
In a second aspect, an embodiment of the present invention provides a fan noise control apparatus, where the apparatus includes:
the rotating speed data acquisition unit is used for acquiring the callback rotating speed data after the fan is started;
the noise reduction condition judging unit is used for determining whether the callback rotation speed data meets the noise reduction condition or not according to the callback rotation speed data;
and the fan noise control unit is used for adjusting the rotating speed of the fan from the callback rotating speed data to preset target rotating speed data and operating according to the preset target rotating speed data when the callback rotating speed data meets the noise reduction condition.
In a third aspect, an embodiment of the present invention further provides a terminal device, which includes a memory, and one or more programs, where the one or more programs are stored in the memory, and the one or more programs are configured to be executed by the one or more processors, and include a method for executing any one of the above schemes.
In a fourth aspect, embodiments of the present invention also provide a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of any one of the above schemes.
Has the advantages that: compared with the prior art, the method for controlling the noise of the fan comprises the steps of firstly obtaining callback rotating speed data after the fan is started, then determining whether the callback rotating speed data meets a noise reduction condition or not according to the callback rotating speed data, and controlling the fan to take the callback rotating speed data as a rotating speed callback node when the callback rotating speed data meets the noise reduction condition, so that when the rotating speed of the fan is larger than the callback rotating speed data, the rotating speed of the fan is controlled to be adjusted from the callback rotating speed data to preset target rotating speed data, and the fan runs with the target rotating speed data. Because the rotating speed peak data of the fan is directly used as the rotating speed callback node in the prior art, when the rotating speed is recalled, the difference between the rotating speed peak data and the target rotating speed data is too large, and severe noise is easily caused. Conversely, the method controls the fan to adjust the rotating speed back when the noise reduction condition is met by judging whether the back-adjusting rotating speed data meets the noise reduction condition or not, and the back-adjusting is carried out without reaching the rotating speed peak data, so that the difference value between the back-adjusting rotating speed data and the target rotating speed data is reduced, the variation range of the speed is smaller, and the fan is prevented from generating noise.
Drawings
Fig. 1 is a flowchart of a specific implementation of a fan noise control method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of blower speed overshoot in the prior art.
Fig. 3 is a schematic diagram illustrating a control of a rotational speed of a fan in the fan noise control method according to the embodiment of the present invention.
Fig. 4 is a flowchart of acquiring rotational speed data in the fan noise control method according to the embodiment of the present invention.
Fig. 5 is a flowchart illustrating a method for controlling fan noise according to an embodiment of the present invention to determine whether a noise reduction condition is satisfied.
Fig. 6 is a flow chart of noise control in the fan noise control method according to the embodiment of the present invention.
Fig. 7 is a schematic block diagram of a fan noise control apparatus according to an embodiment of the present invention.
Fig. 8 is a schematic block diagram of an internal structure of a terminal device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Research shows that after the fan is started, in order to quickly reach a preset target rotating speed, high-frequency output is usually carried out at the initial starting stage so as to increase the rotating speed. When the rotating speed of the fan reaches the target rotating speed, the output is reduced to reduce the rotating speed, so that the rotating speed of the fan tends to be stable. In the prior art, in order to avoid speed delay, the speed generally drops rapidly after the rotating speed overshoots (namely, the rotating speed is greater than the target rotating speed), and the rotating speed overshooting amplitude is large due to high-frequency output when the fan is started, so that the speed changes rapidly when the speed is adjusted back, and noise is easy to generate. As shown in fig. 2, in the starting control stage of the fan, the actual rotation speed of the fan is controlled to be rapidly increased, so that the fan can reach the target rotation speed across the book, and when the actual rotation speed of the fan reaches the target rotation speed, the rotation speed is rapidly decreased, and at this time, the rotation speed is greatly overshot, so that loud noise is generated.
In order to solve the problems in the prior art, the embodiment provides a fan noise control method, and by the method of the embodiment, the fan can be effectively prevented from generating severe noise, and the noise reduction effect is realized. During specific implementation, in this embodiment, first, callback rotational speed data after the fan is started is obtained, then, whether the callback rotational speed data meets a noise reduction condition is determined according to the callback rotational speed data, and when the callback rotational speed data meets the noise reduction condition, the fan is controlled to use the callback rotational speed data as a rotational speed callback node, so that when the rotational speed of the fan is greater than the callback rotational speed data, the rotational speed of the fan is controlled to be adjusted from the callback rotational speed data to preset target rotational speed data, and the fan runs with the target rotational speed data. Because the rotating speed peak data of the fan is directly used as the rotating speed callback node in the prior art, when the rotating speed is recalled, the difference between the rotating speed peak data and the target rotating speed data is too large, and severe noise is easily caused. In the embodiment, whether the callback rotational speed data meets the noise reduction condition is judged, when the noise reduction condition is met, the fan is controlled to carry out rotational speed callback, and the callback is not needed to reach the rotational speed peak data, so that the embodiment is based on the prior art, when the rotational speed callback is carried out, the callback is advanced, as shown in fig. 3, a solid line is a control process for executing the method of the embodiment, and a dotted line is a control process of the prior art. Since the rotation speed callback data is used as the rotation speed callback node in the embodiment, the rotation speed callback is performed when the actual rotation speed of the fan reaches the callback rotation speed data. However, in the embodiment, the rotation speed is adjusted back in advance, so that the rotation speed adjustment back data is smaller than the rotation speed peak data, and when the actual rotation speed of the fan reaches the adjustment back rotation speed data, the rotation speed adjustment back can be controlled, that is, the fan is controlled to reduce the speed, so as to control the fan to reduce to the target speed. And because the callback rotation speed data is smaller than the rotation speed peak data, the change amplitude between the callback rotation speed data and the target rotation speed is smaller, namely, the rotation speed overshoot is smaller, so that the fan can be prevented from generating larger noise.
For example, if the obtained callback rotation speed data after the fan is started is 1300 rpm, then whether the callback rotation speed data meets the noise reduction condition is determined according to the obtained callback rotation speed data, if the callback rotation speed data meets the noise reduction condition, the speed reduction can be started when the actual rotation speed data of the fan reaches 1300 rpm, so that the actual rotation speed data of the fan is reduced to the target rotation speed data, if the target rotation speed data is 1100 rpm, the difference between the callback rotation speed data and the target rotation speed data is only 200 rpm, if the rotation speed peak data of the fan is 1500 rpm, the difference between the rotation speed peak data and the target rotation speed data is 400 rpm, therefore, when the rotation speed is reduced from the callback rotation speed data to the target rotation speed data, the rotation speed change range is not large, and the noise reduction of the fan is facilitated.
Exemplary method
The fan noise control method in the present embodiment may be applied to a terminal, and specifically, as shown in fig. 1, the method in the present embodiment includes the following steps:
and S100, obtaining the rotation speed callback data after the fan is started.
In this example, after the fan is started, in order to quickly reach the preset target rotation speed data, high-frequency output is performed in the initial starting stage to increase the rotation speed. Because the rotational speed of the control fan that this embodiment needs to realize is adjusted back in advance to make the fan when carrying out rotational speed adjustment, can not appear because of the too big problem that leads to the noise increase of speed variation range. Therefore, according to the embodiment, a set of speed-adjusting data is preset, and the speed-adjusting data is used for controlling the fan to adjust the rotating speed. In the prior art, specifically as shown in fig. 2, when the fan performs the speed adjustment back, the speed peak data (the maximum speed of the fan) is used as the speed adjustment back node, in order to implement the speed adjustment back in advance (that is, the speed of the fan can start to perform the speed adjustment back without reaching the speed peak data), specifically as shown in fig. 3, therefore, in this embodiment, the back-adjusted speed data is set to be smaller than the speed peak data, but the back-adjusted speed data is greater than the target speed data, so that when the actual speed data of the fan in the actual operation process reaches the back-adjusted speed data, the speed adjustment back can be performed to control the speed reduction of the fan in advance, and the amplitude of the speed reduction of the fan cannot be too large, thereby avoiding the occurrence of severe noise.
In one implementation, as shown in fig. 4, the step S100 specifically includes the following steps:
step S101, after the fan is started, judging whether the fan is started for the first time;
step S102, if the fan is not started for the first time, obtaining callback rotation speed data meeting the noise reduction condition before the fan is shut down for the last time, and taking the rotation speed of the fan after rotation speed callback before the fan is shut down for the last time as the callback rotation speed data;
and S103, if the fan is started for the first time, acquiring a preset initial value, and taking the initial value as the callback rotation speed data.
During specific implementation, the callback rotational speed data of the fan needs to be acquired, and the callback rotational speed data is used for controlling the rotational speed of the fan to be recalled after the rotational speed overshoots (namely, the rotational speed of the fan is greater than the target rotational speed). In one implementation manner, in this embodiment, the initial value of the rotation speed data is preset by a user, and the rotation speed data is set to be smaller than the rotation speed peak data, so as to control the fan to perform rotation speed adjustment in advance. As shown in fig. 3, the rotating speed of the fan during rotating speed adjustment is smaller than the rotating speed peak value data, that is, the adjusted rotating speed data is smaller than the rotating speed peak value data, so that the rotating speed of the fan can be controlled to be adjusted in advance, the rotating speed does not need to be reduced after the rotating speed peak value data is reached, and noise generated by the fan is favorably avoided. In a specific application, after the fan is started, the callback rotational speed data starts to be acquired, because an initial value of the callback rotational speed data is set by a user, in this embodiment, after the fan is started, it is first necessary to determine whether the fan is started for the first time, that is, determine whether the fan is to execute the fan noise control method in this embodiment for the first time. When the fan noise control method in this embodiment is executed for the first time, that is, when the fan is started for the first time, a preset initial value is obtained, the initial value is used as the callback rotational speed data, and then, whether the callback rotational speed data meets the noise reduction condition is determined in the subsequent steps. Since the rotation speed readjustment data of the fan may be changed with each start of the fan and when the rotation speed overshoots, in order to perform the rotation speed readjustment more accurately, if the fan is not started for the first time, that is, the fan is not executing the fan noise control method of the present embodiment for the first time, in the present embodiment, when the fan noise control method is executed for the second time or later, the rotation speed data of the rotation speed readjustment performed before the last stop of the fan may be acquired as the rotation speed readjustment data, that is, the rotation speed data is adjusted before the last stop of the fan. When the fan noise control method is executed for the second time or later, the callback rotation speed data of the fan meeting the noise reduction condition last time is obtained. For example, when the fan executes the fan noise control method of the embodiment for the third time, the obtained callback rotation speed data is the rotation speed data which meets the noise reduction condition when the fan noise control method is executed for the second time. For example, in this example, the initial value of the rotational speed data set by the user is 1300 rpm, if the fan executes the fan noise control method for the first time, the obtained rotational speed peak data of the fan is 1500 rpm, and the rotational speed data of the rotational speed set by the user is 1300 rpm. And if the fan is executing the fan noise control method for the second time or later, the rotational speed data of the last rotational speed readjustment of the fan can be acquired when the rotational speed data is adjusted back. For example, if the fan performs the fan noise control method the nth time (N > 1), the rotational speed data of the fan performing the rotational speed adjustment back is 1240 rpm, and therefore, when the fan noise control method is performed the N +1 th time, the acquired rotational speed adjustment back data is 1240 rpm.
And S200, determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data.
In specific implementation, after the rotation speed peak data and the callback rotation speed data are obtained, the embodiment needs to determine whether the callback rotation speed data meets the noise reduction condition according to the rotation speed peak data and the callback rotation speed data. The noise reduction condition in this embodiment is preset and is used to measure whether the callback rotational speed data meets the requirement, and if the callback rotational speed data meets the requirement, the fan may be controlled to use the callback rotational speed data as a rotational speed callback node, so that the noise generated by the too large rotational speed variation amplitude when the rotational speed is recalled by the fan may be avoided.
In this embodiment, because the callback rotational speed data has two situations, the first is an initial value of the callback rotational speed data obtained when the fan noise control method is executed for the first time, the initial value is set by a user, and the callback rotational speed data is used for controlling the fan to carry out rotational speed callback in advance, so as to avoid noise caused by too large rotational speed variation amplitude when the fan carries out rotational speed callback. Therefore, when performing noise control, the embodiment needs to analyze the obtained initial value of the callback rotational speed to determine whether the initial value of the callback rotational speed meets a preset noise reduction condition. And secondly, when the fan noise control method is executed for the second time or later, the rotating speed data of the last rotating speed readjustment of the fan is acquired. The rotational speed data of the fan during each rotational speed adjustment may be different, so that when the fan noise control method is executed for the second time or later, the acquired rotational speed data (i.e., the acquired adjustment rotational speed data) of the fan during the last rotational speed adjustment needs to be analyzed to determine whether the adjustment rotational speed data meets the noise reduction requirement.
In one implementation, as shown in fig. 5, the step S200 specifically includes the following steps:
step S201, obtaining rotation speed peak data of the fan, wherein the rotation speed peak data is adjusted back to be smaller than the rotation speed peak data;
step S202, comparing the rotating speed peak value data with the callback rotating speed data to obtain rotating speed difference data;
step S203, determining whether the callback rotation speed data meets the noise reduction condition according to the rotation speed difference data and a preset difference threshold value.
During specific implementation, due to the advance readjustment to be realized in the embodiment, the rotating speed can be adjusted back without reaching the rotating speed peak data when the rotating speed of the fan is required to be adjusted. Therefore, the recalled rotational speed data in this embodiment will be smaller than the rotational speed peak data. The embodiment can acquire the rotating speed peak data of the fan after the fan is started, wherein the rotating speed peak data is the maximum rotating speed data after the fan is started. In addition, in order to obtain the rotation speed peak data of the fan, that is, the maximum rotation speed data of the fan in the operation process, the present embodiment may monitor the real-time rotation speed data of the fan in the operation process in advance, and determine the maximum rotation speed data of the fan in the operation process from the monitored real-time rotation speed data, that is, the rotation speed peak data is obtained. In an implementation manner, this embodiment can determine the rotational speed peak data of the fan, and then store the rotational speed peak data, for example, in a cloud server, so that the rotational speed peak data can be directly obtained from the cloud server when needed. Of course, since the peak data of the rotation speed may be different in each use process of the fan, the peak data of the rotation speed of the fan may also be obtained in real time when the fan operates in this embodiment.
The noise reduction condition set in this embodiment is that the difference between the rotation speed peak data and the callback rotation speed data is greater than or equal to a preset difference threshold. If the rotating speed peak data is M, the rotation speed data is adjusted back to T, and the difference threshold value is Q, so that the noise reduction condition is that M-T is larger than or equal to Q. Therefore, in order to determine whether the rotation speed data of the adjusted back meets the noise reduction condition, the embodiment may compare the rotation speed peak data M with the rotation speed data of the adjusted back T to obtain the rotation speed difference data Δ V, and then compare the rotation speed difference data Δ V with the difference threshold Q. If the rotating speed difference data is greater than or equal to the difference threshold (namely, delta V is greater than or equal to Q), the difference between the readjusted rotating speed data and the rotating speed peak data is larger, and the readjusted rotating speed data is used for controlling the rotating speed of the fan to be immediately adjusted back when the rotating speed of the fan overshoots so that the rotating speed of the fan reaches the target rotating speed data. If the difference between the callback rotation speed data and the rotation speed peak data is larger, the callback rotation speed data and the target rotation speed data (the target rotation speed data is set by a user and is unchanged) are smaller, that is, the callback rotation speed data can be determined to meet the noise reduction condition, so that when the rotation speed of the fan is recalled, the rotation speed is not changed greatly when the callback rotation speed data is reduced to the target rotation speed data, and noise can be effectively avoided. If the rotating speed difference data is smaller than the difference threshold value (namely, Δ V is smaller than Q), it means that the difference between the callback rotating speed data and the rotating speed peak data is smaller, that is, the difference between the callback rotating speed data and the target rotating speed data is larger, and it is determined that the callback rotating speed data does not satisfy the noise reduction condition. If the fan carries out the rotational speed callback with this callback rotational speed data, the rotational speed of fan changes greatly, can produce great noise.
For example, if the peak data of the rotation speed is 1500 rpm, the recalled rotation speed data is 1300 rpm, and the difference threshold is 100 rpm, so that the difference between the peak data of the rotation speed and the recalled rotation speed data is 200 rpm, which is greater than the difference threshold, and it is determined that the recalled rotation speed data 1300 rpm meets the noise reduction condition. If the callback rotational speed data is 1450 rpm, the difference between the rotational speed peak data and the callback rotational speed data is 500 rpm, which is smaller than the difference threshold, so that it can be determined that the callback rotational speed data 1450 rpm does not meet the noise reduction condition.
In another implementation manner, if the rotation speed data of the callback does not satisfy the noise reduction condition, the rotation speed data of the callback needs to be adjusted in this embodiment, and the purpose of the adjustment is to enable the rotation speed data of the callback to satisfy the noise reduction condition. In specific implementation, if the callback rotational speed data T does not satisfy the noise reduction condition, that is, the rotational speed difference data between the rotational speed peak data M and the callback rotational speed data T is smaller than the difference threshold Q (M-T < Q), it indicates that the difference between the callback rotational speed data and the rotational speed peak data is smaller at this time, which means that the difference between the callback rotational speed data and the target rotational speed data is larger, and if the rotational speed of the fan is recalled by using the callback rotational speed data at this time, the rotational speed of the fan changes greatly, which may generate larger noise. Therefore, in this embodiment, the callback rotational speed data needs to be reduced, so that the rotational speed difference between the reduced callback rotational speed data and the rotational speed peak data can be greater than the difference threshold, as shown in fig. 3, that is, the difference between the reduced callback rotational speed data and the target rotational speed data can be reduced, so that when the fan uses the reduced callback rotational speed data as the rotational speed callback node, the rotational speed change of the fan is small, and noise is avoided.
In an implementation manner, when the callback rotational speed data is reduced, a rotational speed derating value may be obtained, and the callback rotational speed data is reduced by the rotational speed derating value. The rotational speed derating value is used to measure a reduction amplitude of the readjusted rotational speed data, that is, when the readjusted rotational speed data is reduced, the reduction amplitude is what. In this embodiment, the rotation speed derating value satisfies the formula: e ═ N-1) R. Wherein E is the rotation speed derating value, N is the number of times of executing the fan noise control method of the present embodiment, and R is the rotation speed reduced each time. That is, as the number of times the fan executes the fan noise control method of the present embodiment is increased, the reduction range is increased when the callback rotational speed data is reduced. For example, the number of times N for executing the fan noise control method of this embodiment is 10, and R is 10 rpm, so that the rotational speed derating value is 90 rpm at this time, and thus this embodiment may reduce the callback rotational speed data according to the rotational speed derating value, so that the reduced callback rotational speed data meets the noise reduction condition. It should be noted that, in the embodiment, when the rotation speed data of the callback is reduced, the rotation speed data of the callback can be gradually reduced to meet the noise reduction condition by taking the rotation speed reduction value as a unit.
And S300, when the rotation speed readjustment data meet the noise reduction condition, adjusting the rotation speed of the fan from the rotation speed readjustment data to preset target rotation speed data, and operating according to the target rotation speed data.
Specifically, when the rotation speed callback data meets the noise reduction condition set in the embodiment, the fan can be controlled to use the rotation speed callback data as the rotation speed callback node. The rotation speed return adjusting point is worth of being a node when the fan performs rotation speed return (namely, the fan is reduced to target rotation speed data when the rotation speed overshoots). When the fan takes the callback rotation speed data as a rotation speed callback node, the rotation speed of the fan is reduced to the target rotation speed data after reaching the callback rotation speed data. Because the difference between the callback rotation speed data and the rotation speed peak data is large (namely M-T is larger than or equal to Q, and the callback rotation speed data T meets the noise reduction condition), the callback rotation speed data and the target rotation speed data have small difference, so that when the rotation speed of the fan is recalled, the rotation speed is not changed greatly when the callback rotation speed data is reduced to the target rotation speed data, and the noise can be effectively avoided. And after the rotating speed of the fan is reduced to the target rotating speed data, controlling the fan to operate at the preset target rotating speed data so as to ensure the stable work of the fan.
In one implementation, as shown in fig. 6, the step S300 specifically includes the following steps:
s301, when the rotation speed data adjusted back meets the noise reduction condition, acquiring real-time rotation speed data of the fan;
and S302, when the real-time rotating speed data of the fan is larger than or equal to the callback rotating speed data, controlling the fan to reduce the speed so that the real-time rotating speed data of the fan is reduced to the target rotating speed data, and operating with the target rotating speed data.
As this embodiment is to realize, if the rotation speed of the fan is controlled to reach the rotation speed adjustment data when the rotation speed adjustment data in this embodiment satisfies the noise reduction condition, the rotation speed adjustment is immediately performed, specifically, as shown in fig. 3, when the rotation speed of the fan reaches the rotation speed adjustment data, the wind is controlled to reduce the speed to the target rotation speed data. Compared with the scheme that the rotating speed peak data is used as the rotating speed callback node in the prior art (as shown in fig. 2, the fan is controlled to reduce the rotating speed only when the fan reaches the rotating speed peak data in the prior art), the embodiment is a rotation speed callback method, as is obvious from fig. 3, the rotating speed of the fan is not required to be reduced after reaching the rotating speed peak data, the rotating speed of the fan starts to reduce after reaching the callback rotating speed data, and the difference between the callback rotating speed data and the target rotating speed data is small, so that the rotating speed reduction amplitude is not large, and the noise caused by the overlarge rotating speed change of the fan is avoided. Therefore, in this embodiment, real-time rotation speed data of the fan needs to be acquired, where the real-time rotation speed data refers to a rotation speed acquired by the fan in real time in an operation process. After the real-time rotation speed data is obtained, the embodiment compares the real-time rotation speed data with the callback rotation speed data. If the real-time rotating speed data of the fan is greater than or equal to the callback rotating speed data, it indicates that the rotating speed callback is required at this time, so that the present embodiment may control the fan to slow down, so that the real-time rotating speed data of the fan is reduced to the target rotating speed data, and the fan operates with the target rotating speed data, that is, as shown in fig. 3, the fan operates with a preset target a. The callback rotating speed data meets the noise reduction condition, namely the callback rotating speed data has a larger difference with the rotating speed peak data (namely M-T is larger than or equal to Q, and the callback rotating speed data T meets the noise reduction condition), which shows that the callback rotating speed data has a smaller difference with the target rotating speed data, so that when the rotating speed of the fan is recalled, the rotating speed is not changed greatly when the callback rotating speed data is reduced to the target rotating speed data, and the noise can be effectively avoided.
It can be seen that, in this embodiment, first, callback rotational speed data after the fan is started is obtained, then, according to the callback rotational speed data, whether the callback rotational speed data meets a noise reduction condition is determined, and when the callback rotational speed data meets the noise reduction condition, the fan is controlled to use the callback rotational speed data as a rotational speed callback node, so that when the rotational speed of the fan is greater than the callback rotational speed data, the rotational speed of the fan is controlled to be adjusted from the callback rotational speed data to preset target rotational speed data, and the fan operates with the target rotational speed data. Because the rotating speed peak data of the fan is directly used as the rotating speed callback node in the prior art, when the rotating speed is recalled, the difference between the rotating speed peak data and the target rotating speed data is too large, and severe noise is easily caused. Conversely, in the embodiment, whether the callback rotational speed data meets the noise reduction condition is judged, when the noise reduction condition is met, the fan is controlled to carry out rotational speed callback, and the callback is not needed to reach the rotational speed peak data, so that the difference between the callback rotational speed data and the target rotational speed data is reduced, the variation range of the speed is smaller, and the fan is prevented from generating noise.
Exemplary device
As shown in fig. 7, an embodiment of the present invention provides a fan noise control apparatus, including: a rotating speed data acquisition unit 10, a noise reduction condition judgment unit 20 and a fan noise control unit 30. Specifically, the rotational speed data acquiring unit 10 is configured to acquire callback rotational speed data after the fan is started. And the noise reduction condition determining unit 20 is configured to determine whether the callback rotational speed data meets the noise reduction condition according to the callback rotational speed data. And the fan noise control unit 40 is configured to adjust the rotation speed of the fan from the adjusted rotation speed data to preset target rotation speed data when the adjusted rotation speed data meets the noise reduction condition, and operate according to the target rotation speed data.
In one implementation, the rotational speed data obtaining unit 10 includes:
the fan starting judgment subunit is used for judging whether the fan is started for the first time or not after the fan is started;
and the callback rotation speed data acquisition subunit is used for acquiring callback rotation speed data meeting the noise reduction condition before the last shutdown of the fan if the fan is not started for the first time, and taking the rotation speed of the fan subjected to rotation speed callback before the last shutdown as the callback rotation speed data.
In one implementation, the noise reduction condition determining unit 20 includes:
the data acquisition subunit is used for acquiring the rotating speed peak data of the fan after the fan is started, and the readjusted rotating speed data is smaller than the rotating speed peak data;
the data comparison subunit is used for comparing the rotating speed peak data with the readjusted rotating speed data to obtain rotating speed difference data;
and the condition judging subunit is used for determining whether the callback rotation speed data meets the noise reduction condition according to the rotation speed difference data.
In one implementation, the fan noise control unit 30 includes:
the real-time rotating speed data acquiring subunit is used for acquiring the real-time rotating speed data of the fan when the callback rotating speed data meets the noise reduction condition;
and the rotating speed callback realizing subunit is used for controlling the speed reduction of the fan when the real-time rotating speed data of the fan is greater than or equal to the callback rotating speed data, so that the real-time rotating speed data of the fan approaches to the target rotating speed data, and the fan runs at the target rotating speed data.
Based on the above embodiments, the present invention further provides a terminal device, and a schematic block diagram thereof may be as shown in fig. 8. The terminal equipment comprises a processor, a memory, a network interface, a display screen and a temperature sensor which are connected through a system bus. Wherein the processor of the terminal device is configured to provide computing and control capabilities. The memory of the terminal equipment comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the terminal device is used for connecting and communicating with an external terminal through a network. The computer program is executed by a processor to implement a fan noise control method. The display screen of the terminal equipment can be a liquid crystal display screen or an electronic ink display screen, and the temperature sensor of the terminal equipment is arranged in the terminal equipment in advance and used for detecting the operating temperature of the internal equipment.
It will be understood by those skilled in the art that the block diagram shown in fig. 8 is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation to the terminal device to which the solution of the present invention is applied, and a specific terminal device may include more or less components than those shown in the figure, or combine some components, or have a different arrangement of components.
In one embodiment, a terminal device is provided that includes a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for:
obtaining the speed-adjusting data after the fan is started;
determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data;
and when the callback rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the callback rotation speed data to preset target rotation speed data, and operating according to the target rotation speed data.
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 hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
In summary, the present invention discloses a fan noise control method, device, storage medium and terminal device, wherein the method includes: obtaining the speed-adjusting data after the fan is started; determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data; and when the callback rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the callback rotation speed data to preset target rotation speed data, and operating according to the target rotation speed data. According to the invention, when the callback rotation speed data meets the noise reduction condition, the callback rotation speed data is used as the rotation speed callback node, so that the speed is recalled when the rotation speed of the fan reaches the callback rotation speed data, the rotation speed of the fan is adjusted from the callback rotation speed data to the target rotation speed data, and the fan moves according to the target rotation speed data, so that the noise generated by the fan is avoided.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of fan noise control, the method comprising:
obtaining the speed-adjusting data after the fan is started;
determining whether the callback rotation speed data meets a noise reduction condition or not according to the callback rotation speed data;
and when the callback rotation speed data meets the noise reduction condition, adjusting the rotation speed of the fan from the callback rotation speed data to preset target rotation speed data, and operating according to the target rotation speed data.
2. The fan noise control method according to claim 1, wherein the obtaining of the rotational speed data of the fan after starting comprises:
after the fan is started, judging whether the fan is started for the first time;
if the fan is not started for the first time, obtaining callback rotation speed data meeting the noise reduction condition before the fan is shut down last time, and taking the rotation speed of the fan subjected to rotation speed callback before the fan is shut down last time as the callback rotation speed data;
and if the fan is started for the first time, acquiring a preset initial value, and taking the initial value as the callback rotation speed data.
3. The fan noise control method according to claim 1, wherein the determining whether the rotation speed data of the turning back meets a noise reduction condition according to the rotation speed data of the turning back includes:
acquiring the rotating speed peak data of the fan, wherein the rotation speed peak data is adjusted back to be smaller than the rotating speed peak data;
comparing the rotating speed peak value data with the readjusted rotating speed data to obtain rotating speed difference data;
and determining whether the callback rotating speed data meets the noise reduction condition or not according to the rotating speed difference data.
4. The fan noise control method according to claim 3, wherein the noise reduction condition is that the rotation speed difference is greater than or equal to a preset difference threshold.
5. The fan noise control method according to claim 1 or 4, wherein when the turn-back rotational speed data satisfies the noise reduction condition, the adjusting the rotational speed of the fan from the turn-back rotational speed data to a preset target rotational speed data and operating with the preset target rotational speed data includes:
when the callback rotational speed data meets the noise reduction condition, acquiring real-time rotational speed data of the fan;
and when the real-time rotating speed data of the fan is larger than or equal to the callback rotating speed data, controlling the fan to reduce the speed so that the real-time rotating speed data of the fan is reduced to the target rotating speed data, and operating with the target rotating speed data.
6. The fan noise control method of claim 1, further comprising:
when the callback rotational speed data does not meet the noise reduction condition, reducing the callback rotational speed data to obtain reduced callback rotational speed data;
determining whether the reduced callback rotational speed data meets the noise reduction condition according to the reduced callback rotational speed data,
and when the reduced callback rotating speed data meets the noise reduction condition, adjusting the rotating speed of the fan from the reduced callback rotating speed data to the target rotating speed data, and operating with the target rotating speed data.
7. The fan noise control method according to claim 6, wherein when the callback rotational speed data does not satisfy the noise reduction condition, reducing the callback rotational speed data to obtain reduced callback rotational speed data, includes:
when the callback rotational speed data does not meet the noise reduction condition, acquiring a rotational speed derating value, wherein the rotational speed derating value is used for measuring the reduction amplitude of the callback rotational speed data;
and reducing the callback rotation speed data according to the rotation speed derating value to obtain the reduced callback rotation speed data.
8. A fan noise control apparatus, the apparatus comprising:
the rotating speed data acquisition unit is used for acquiring the callback rotating speed data after the fan is started;
the noise reduction condition judging unit is used for determining whether the callback rotation speed data meets the noise reduction condition or not according to the callback rotation speed data;
and the fan noise control unit is used for adjusting the rotating speed of the fan from the callback rotating speed data to preset target rotating speed data and operating according to the preset target rotating speed data when the callback rotating speed data meets the noise reduction condition.
9. A terminal device comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory, and wherein the one or more programs being configured to be executed by the one or more processors comprises instructions for performing the method of any of claims 1-7.
10. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of any of claims 1-7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113099695A (en) * | 2021-04-07 | 2021-07-09 | 上海应用技术大学 | PLC frequency conversion temperature control system for box-in ventilation of converter transformer |
| CN114543323A (en) * | 2022-01-24 | 2022-05-27 | 青岛海尔空调器有限总公司 | Method and device for air volume adjustment of air conditioner and air conditioner |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001170391A (en) * | 1999-12-15 | 2001-06-26 | Sanyo Electric Co Ltd | Washing machine |
| US20020039009A1 (en) * | 1999-09-20 | 2002-04-04 | Hideshi Mochizuki | Spindle-motor control method, spindle-motor control device, spindle-motor drive circuit and disk device |
| CN103185016A (en) * | 2011-12-27 | 2013-07-03 | 珠海格力电器股份有限公司 | Method and device for adjusting rotating speed of inner fan of air conditioner |
| CN103312237A (en) * | 2012-03-09 | 2013-09-18 | 珠海格力电器股份有限公司 | Control method and device for single phase asynchronous motor starting and air conditioner |
| CN104236000A (en) * | 2013-06-17 | 2014-12-24 | 海尔集团公司 | Air conditioner outdoor fan starting method |
| CN104579020A (en) * | 2013-10-25 | 2015-04-29 | 广东美的制冷设备有限公司 | Startup control method and startup control system for PG speed regulating motor |
| CN104653444A (en) * | 2015-01-30 | 2015-05-27 | 海信科龙电器股份有限公司 | Method and device for controlling starting of variable-frequency air conditioner |
| CN110425703A (en) * | 2019-07-09 | 2019-11-08 | Tcl空调器(中山)有限公司 | A kind of starting method, storage medium and the air-conditioning of compressor of air conditioner |
| CN111023476A (en) * | 2019-12-19 | 2020-04-17 | Tcl空调器(中山)有限公司 | Compressor operation frequency adjusting method, storage medium and air conditioner |
| CN111219351A (en) * | 2020-01-17 | 2020-06-02 | 珠海格力电器股份有限公司 | Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment |
-
2020
- 2020-11-26 CN CN202011344906.7A patent/CN112460059B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020039009A1 (en) * | 1999-09-20 | 2002-04-04 | Hideshi Mochizuki | Spindle-motor control method, spindle-motor control device, spindle-motor drive circuit and disk device |
| JP2001170391A (en) * | 1999-12-15 | 2001-06-26 | Sanyo Electric Co Ltd | Washing machine |
| CN103185016A (en) * | 2011-12-27 | 2013-07-03 | 珠海格力电器股份有限公司 | Method and device for adjusting rotating speed of inner fan of air conditioner |
| CN103312237A (en) * | 2012-03-09 | 2013-09-18 | 珠海格力电器股份有限公司 | Control method and device for single phase asynchronous motor starting and air conditioner |
| CN104236000A (en) * | 2013-06-17 | 2014-12-24 | 海尔集团公司 | Air conditioner outdoor fan starting method |
| CN104579020A (en) * | 2013-10-25 | 2015-04-29 | 广东美的制冷设备有限公司 | Startup control method and startup control system for PG speed regulating motor |
| CN104653444A (en) * | 2015-01-30 | 2015-05-27 | 海信科龙电器股份有限公司 | Method and device for controlling starting of variable-frequency air conditioner |
| CN110425703A (en) * | 2019-07-09 | 2019-11-08 | Tcl空调器(中山)有限公司 | A kind of starting method, storage medium and the air-conditioning of compressor of air conditioner |
| CN111023476A (en) * | 2019-12-19 | 2020-04-17 | Tcl空调器(中山)有限公司 | Compressor operation frequency adjusting method, storage medium and air conditioner |
| CN111219351A (en) * | 2020-01-17 | 2020-06-02 | 珠海格力电器股份有限公司 | Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113099695A (en) * | 2021-04-07 | 2021-07-09 | 上海应用技术大学 | PLC frequency conversion temperature control system for box-in ventilation of converter transformer |
| CN114543323A (en) * | 2022-01-24 | 2022-05-27 | 青岛海尔空调器有限总公司 | Method and device for air volume adjustment of air conditioner and air conditioner |
| CN114543323B (en) * | 2022-01-24 | 2024-04-19 | 青岛国创智能家电研究院有限公司 | Method and device for adjusting air quantity of air conditioner and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN112460059B (en) | 2022-07-29 |
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