CN109654054B

CN109654054B - Method and device for controlling fan of electronic equipment and storage medium

Info

Publication number: CN109654054B
Application number: CN201811553510.6A
Authority: CN
Inventors: 贺潇
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-07-10
Anticipated expiration: 2038-12-18
Also published as: CN109654054A

Abstract

The disclosure provides a control method and a control device for a fan of an electronic device and a storage medium. The control method comprises the steps of obtaining the ambient temperature, the temperature rise of a heating element and the power of the heating element when the fan works in a heat dissipation mode; judging whether dust removal is needed or not according to the acquired environment temperature, the temperature rise of the heating element, the power of the heating element and a preset corresponding relation; and when dust removal is needed, controlling the fan to work in a dust removal mode. Whether dust removal is needed is judged according to a preset corresponding relation through acquiring the ambient temperature, the temperature rise of the heating element and the power of the heating element in the working process of the electronic equipment, and when dust removal is needed, the fan is controlled to work in a dust removal mode, so that the electronic equipment can automatically remove dust when dust removal is needed, dust deposition on the fan can be timely and effectively removed, and normal work of the electronic equipment is ensured.

Description

Method and device for controlling fan of electronic equipment and storage medium

Technical Field

The present disclosure relates to the field of heat dissipation technologies, and in particular, to a method and an apparatus for controlling a fan of an electronic device, and a storage medium.

Background

During the operation of the electronic device, the internal heating element generates a large amount of heat, such as a central processing unit on a computer motherboard. In the related art, a heat dissipation fan corresponding to the position of the heat generating element is assembled in the electronic apparatus, and the heat dissipation fan reduces the temperature of the heat generating element by accelerating the air flow at the heat generating element.

In the process of driving air flow by the heat dissipation fan, foreign matters such as dust in the air can be attached to the heat dissipation fan. If the dust removal work is not timely and effectively carried out on the cooling fan, the air outlet of the cooling fan is blocked, the service life of the cooling fan is shortened, the heat dissipation performance of the electronic equipment is reduced, the noise is increased, and the like, and even the electronic equipment is overheated and damaged.

Disclosure of Invention

The embodiment of the disclosure provides a control method and a control device for a fan of an electronic device and a storage medium, which can conveniently and timely remove dust for the fan of the electronic device. The technical scheme is as follows:

in a first aspect, an embodiment of the present disclosure provides a method for controlling a fan of an electronic device, where the electronic device has a heat generating element and the fan, the method including:

when the fan works in a heat dissipation mode, acquiring the ambient temperature, the temperature rise of a heating element and the power of the heating element;

judging whether dust removal is needed or not according to the acquired environment temperature, the temperature rise of the heating element, the power of the heating element and a preset corresponding relation, wherein the corresponding relation is the corresponding relation among the environment temperature, the temperature rise of the heating element and the power of the heating element, which is acquired when the fan works in the heat dissipation mode, when the dust deposition degree of the fan does not exceed the preset degree;

and when dust removal is needed, controlling the fan to work in a dust removal mode. Whether dust removal is needed is judged according to a preset corresponding relation through acquiring the ambient temperature, the temperature rise of the heating element and the power of the heating element in the working process of the electronic equipment, and when dust removal is needed, the fan is controlled to work in a dust removal mode, so that the electronic equipment can automatically remove dust when dust removal is needed, dust deposition on the fan can be timely and effectively removed, and normal work of the electronic equipment is ensured.

In a possible implementation manner of the embodiment of the present disclosure, the determining whether dust removal is needed according to the obtained ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset corresponding relationship includes:

determining theoretical power corresponding to the environment temperature and the temperature rise in the heat dissipation mode according to the corresponding relation;

and when the ratio of the power of the heating element to the theoretical power in the heat dissipation mode is lower than a first threshold value, judging that dust removal is needed, wherein the first threshold value is a positive number smaller than 1. Under the condition of a certain ambient temperature, the temperature rise of the heating element is in positive correlation with the power. When the temperature rise is the same, comparing the power of the heating element with more dust deposition on the fan with the power of the heating element with the dust deposition degree on the fan not exceeding the preset degree, the power of the heating element is smaller, the power of the heating element with the dust deposition degree on the fan not exceeding the preset degree is taken as the theoretical power, the smaller the ratio of the power of the heating element to the theoretical power is, the more serious the dust deposition is, and when the ratio is lower than a first threshold value, the dust deposition reaches a certain degree and dust removal is needed.

determining theoretical temperature rises corresponding to the environment temperature and the power in the heat dissipation mode according to the corresponding relation;

and when the ratio of the temperature rise of the heating element in the heat dissipation mode to the theoretical temperature rise is higher than a second threshold value, judging that dust removal is needed, wherein the second threshold value is a positive number larger than 1. Under the condition of a certain ambient temperature, the temperature rise of the heating element is in positive correlation with the power. When the power of the heating element is the same, the more serious the dust deposition on the fan is, the worse the heat dissipation is, the larger the temperature rise of the heating element is taken as the theoretical temperature rise when the dust deposition degree of the fan is not more than the preset degree, the larger the ratio of the temperature rise of the heating element to the theoretical temperature rise is, the more serious the dust deposition is, and when the ratio is higher than the second threshold, the dust deposition reaches a certain degree, and dust removal is needed.

determining theoretical environment temperature corresponding to the temperature rise and the power in the heat dissipation mode according to the corresponding relation;

and when the ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is smaller than a third threshold, determining that dust removal is required, wherein the third threshold is a positive number smaller than 1. If the power of the heating element is the same and the same temperature rise is achieved under different ambient temperatures, the dust accumulation of the fan at the lower ambient temperature is more serious. When the dust accumulation degree of the fan does not exceed the preset degree, the environmental temperature of the heating element is taken as the theoretical environmental temperature, the lower the environmental temperature of the heating element which achieves the same temperature rise with the same power is, the more serious the dust accumulation of the fan for radiating the heating element is, and when the ratio of the environmental temperature of the heating element to the theoretical environmental temperature is smaller than a third threshold value, the dust accumulation reaches a certain degree and the dust removal is needed.

In a possible implementation manner of the embodiment of the present disclosure, the method further includes:

when the dust accumulation degree of the fan is not more than the preset degree, the fan gradually changes the power of the heating element at different environmental temperatures during the work of the heat dissipation mode, and the environmental temperature, the temperature rise of the heating element and the power of the heating element are respectively recorded so as to obtain the corresponding relation. Under the condition that the dust laying degree of the fan does not exceed the preset degree, the environment temperature can be set to be the first temperature, the temperature rise corresponding to different powers is recorded by gradually changing the power of the heating element, and therefore the relation between the power and the temperature rise at the first temperature can be obtained. And setting the ambient temperature to be a second temperature, gradually changing the power of the heating element, and recording the temperature rise corresponding to different powers, so that the relationship between the power and the temperature rise at the second temperature can be obtained. By recording the relationship between the power and the temperature rise under different environmental temperatures, the corresponding relationship between the environmental temperature, the temperature rise of the heating element and the power of the heating element, which is created when the dust accumulation degree of the fan does not exceed the preset degree, can be obtained.

when dust removal is needed, controlling a fan of the electronic equipment to reversely rotate for dust removal;

in the process of controlling the fan of the electronic equipment to work in the dust removal mode, when the temperature of the heating element rises to a preset threshold value or the fan works in the dust removal mode for a preset time length, the fan of the electronic equipment is controlled to work in the heat dissipation mode. The fan has a good heat dissipation effect on the heating element only in the forward rotation process, the fan rotates reversely in the dust removal process, the heat dissipation effect on the heating element is weakened, the temperature of the heating element can rise, in order to guarantee the normal work of the heating element, the temperature of the heating element is limited within a preset threshold value, when the temperature of the heating element rises to the preset threshold value in the dust removal process, the fan is controlled to dissipate heat in the forward rotation mode through temporary dust removal, and the temperature of the heating element is reduced.

In a possible implementation manner of the embodiment of the present disclosure, when the fan operates in the heat dissipation mode, acquiring an ambient temperature, a temperature rise of the heat generating element, and a power of the heat generating element includes:

when the fan works in a heat radiation mode, when the following arbitrary conditions are met, the ambient temperature, the temperature rise of the heating element and the power of the heating element are obtained:

the power of the heating element is lower than a preset power value;

the operation time length of the heating element is lower than a preset time length value. The condition that the dust removal process is suspended due to the fact that the temperature of the heating element rises to a preset threshold value can be avoided, and the improvement of the dust removal efficiency is facilitated

In a second aspect, an embodiment of the present disclosure provides a control apparatus for a fan of an electronic device, the electronic device having a heat generating element and the fan, including:

the acquisition module is used for acquiring the ambient temperature, the temperature rise of the heating element and the power of the heating element when the fan works in a heat dissipation mode;

the judging module is used for judging whether dust removal is needed or not according to the acquired environment temperature, the temperature rise of the heating element, the power of the heating element and a preset corresponding relation, wherein the corresponding relation is the corresponding relation among the environment temperature, the temperature rise of the heating element and the power of the heating element, which is acquired when the fan works in the heat dissipation mode when the dust accumulation degree of the fan does not exceed the preset degree;

and the control module is used for controlling the fan to work in a dust removal mode when dust removal is needed.

In a possible implementation manner of the embodiment of the present disclosure, the determining module is configured to determine, according to the correspondence, a theoretical power corresponding to the ambient temperature and the temperature rise in the heat dissipation mode, and determine that dust removal is required when a ratio of a power of the heating element in the heat dissipation mode to the theoretical power is lower than a first threshold, where the first threshold is a positive number smaller than 1.

In a possible implementation manner of the embodiment of the present disclosure, the determining module is configured to determine a theoretical temperature rise corresponding to the ambient temperature and the power in the heat dissipation mode according to the correspondence, and determine that dust removal is required when a ratio of the temperature rise of the heat element in the heat dissipation mode to the theoretical temperature rise is higher than a second threshold, where the second threshold is a positive number greater than 1.

In a possible implementation manner of the embodiment of the present disclosure, the determining module is configured to determine a theoretical ambient temperature corresponding to the temperature rise and the power in the heat dissipation mode according to the correspondence, and determine that dust removal is required when a ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is smaller than a third threshold, where the third threshold is a positive number smaller than 1.

In a possible implementation manner of the embodiment of the present disclosure, the apparatus further includes a storage module, configured to store the corresponding relationship, where the corresponding relationship is obtained in the following manner:

the dust accumulation degree of the fan is not more than the preset degree, the fan gradually changes the power of the heating element at different environmental temperatures when the fan works in the heat dissipation mode, and the environmental temperature, the temperature rise of the heating element and the power of the heating element are respectively recorded so as to obtain the corresponding relation.

In a possible implementation manner of the embodiment of the present disclosure, the control module is further configured to control the fan of the electronic device to operate in the heat dissipation mode when the temperature of the heating element rises to a preset threshold or the fan operates in the dust removal mode for a preset duration in a process of controlling the fan of the electronic device to operate in the dust removal mode.

In a possible implementation manner of the embodiment of the present disclosure, the obtaining module is configured to obtain an ambient temperature, a temperature rise of the heating element, and a power of the heating element when the fan operates in the heat dissipation mode and when any of the following conditions is satisfied:

the power of the heating element is lower than a preset power value;

the operation time length of the heating element is lower than a preset time length value.

In a third aspect, an embodiment of the present disclosure provides a control apparatus for a fan of an electronic device, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of the method of controlling a fan of an electronic device according to the first aspect.

In a fourth aspect, the present disclosure provides a storage medium including at least one instruction, and when executed by a processor, the method for controlling a fan of an electronic device according to the first aspect is performed.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise: whether dust removal is needed is judged according to a preset corresponding relation through acquiring the ambient temperature, the temperature rise of the heating element and the power of the heating element in the working process of the electronic equipment, and when dust removal is needed, the fan is controlled to work in a dust removal mode, so that the electronic equipment can automatically remove dust when dust removal is needed, dust deposition on the fan can be timely and effectively removed, and normal work of the electronic equipment is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a fan of an electronic device;

FIG. 2 is a graph illustrating the relationship between the rotation speed of a fan blade and the temperature of a heating element according to an embodiment of the disclosure;

fig. 3 is a flowchart of a method for controlling a fan of an electronic device according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a corresponding relationship provided by the embodiment of the present disclosure;

FIG. 5 is a schematic diagram illustrating a relationship between an ambient temperature and a temperature rise after dust deposition on a fan according to an embodiment of the disclosure;

FIG. 6 is a schematic diagram of a temperature rise versus power relationship provided by an embodiment of the present disclosure;

fig. 7 is a flowchart of a method for controlling a fan of an electronic device according to an embodiment of the present disclosure;

fig. 8 is a flowchart of a method for controlling a fan of an electronic device according to another embodiment of the disclosure;

fig. 9 is a flowchart of a method for controlling a fan of an electronic device according to another embodiment of the disclosure;

fig. 10 is a schematic structural diagram of a control device of a fan of an electronic device according to an embodiment of the present disclosure;

fig. 11 is a block diagram illustrating a control apparatus for a fan of an electronic device according to an exemplary embodiment.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The electronic equipment is provided with the heating element and the fan, the heating element can generate heat in the working process of the electronic equipment, and the heat dissipation assembly can dissipate the heat of the heating element to reduce the temperature of the heating element.

In some electronic devices, the heat dissipation assembly includes a fan, the fan includes fan blades, and the fan blades rotate to form an air flow to blow the heating element when dissipating heat, so as to take away heat generated by the heating element, thereby achieving the purpose of heat dissipation. In another part of electronic equipment, the heat dissipation assembly further comprises heat dissipation fins, the heat dissipation fins are arranged close to the heating element, and the fan blades rotate to form air flow when heat dissipation is performed, so that the heat of the heating element is taken away. The fan and the radiating fins can be of a split structure or an integrated structure.

Fig. 1 is a schematic structural diagram of a fan of an electronic device. As shown in fig. 1, the fan includes a housing 1, a heat dissipating fin 2 and a fan blade 3 rotatably connected in the housing 1, the housing 1 has an air inlet 1a, an air outlet 1b and a dust removing port 1c corresponding to the fan blade 3, the air inlet 1a is located in an axial direction of the fan blade 3, and the air outlet 1b and the dust removing port 1c are located in a radial direction of the fan blade 3. When the fan blades 3 rotate, air flows from the air inlet 1a to the fan blades 3, and the air is discharged from the air outlet 1b or the dust removing port 1c along with the rotation of the fan blades 3. The aperture of the air inlet 1a is smaller than the rotation diameter of the fan blade 3, and air can be driven by the fan blade 3 when entering the shell 1. The heat radiating fins 2 are located on the casing 1, and the heat radiating fins 2 are arranged at the air outlet 1 b. The heat radiating fins 2 can be closely attached to the heating element. When heat is dissipated, the fan blade 3 rotates to form an air flow to blow the heat dissipating fin 2, thereby taking away heat of the heating element. After the electronic device works for a period of time, dust deposited on the fan blades 3 and the heat dissipation fins 2 can affect the heat dissipation of the fan to the heating element, thereby affecting the normal work of the electronic device. Some fans of other electronic devices may not be provided with the heat dissipation fins 2, and the fan blades 3 rotate to form an air flow when heat dissipation is performed, so that the air flow directly blows the heating element, and the heat generated by the heating element can be taken away, thereby achieving the purpose of heat dissipation.

The fan of the electronic equipment has two working modes, namely a heat dissipation mode and a dust removal mode.

When the fan works in the heat dissipation mode, the fan blades of the fan can rotate (rotate positively) along the first direction or not. When the temperature of the heating element is lower, the natural heat dissipation can meet the heat dissipation requirement of the heating element, the fan blade can not rotate at the moment, when the temperature of the heating element is higher, the natural heat dissipation can not meet the heat dissipation requirement of the heating element, and the fan blade rotates along the first direction to dissipate heat of the heating element. Or when the fan works in the heat dissipation mode, the fan blades of the fan can also rotate along the first direction all the time.

When the fan blades rotate along the first directionThe relation between the rotating speed n of the fan blade and the temperature t of the heating element satisfies the equation n ═ at³+bt²+ ct + d, wherein a, b, c and d are positive numbers. The higher the temperature of the heating element, the higher the rotation speed of the fan blade. Fig. 2 is a graph illustrating a relationship between a rotation speed of a fan blade and a temperature of a heating element according to an embodiment of the disclosure. As shown in fig. 2, a curve 1 in the figure is a relationship curve between the rotation speed of the fan blade and the temperature of the heating element while the temperature of the heating element is increasing, and a curve 2 is a relationship curve between the rotation speed of the fan blade and the temperature of the heating element while the temperature of the heating element is decreasing. The curve 1 does not overlap the curve 2, which is to prevent the rotation speed of the fan blade from repeatedly fluctuating with the change in temperature of the heating element. The rotation speed of the fan blades is substantially the same at a certain temperature of the heating element, regardless of whether the temperature of the heating element is increased or decreased. Under the condition that the elevation influence is ignored, for the same fan, the rotating speed of the fan blades is certain, the air exhaust quantity of the air outlet is certain, and the heat dissipation capacity of the fan is also fixed. The relationship between the air discharge quantity of the air outlet and the rotating speed of the fan blades satisfies an equation q₁/q₂＝n₁/n₂Wherein q is₁And q is₂Are the amount of exhaust air, n₁The exhaust air quantity is q₁Speed of the blades, n₂The exhaust air quantity is q₂The rotating speed of the fan blades, namely the air discharge quantity of the air outlet and the rotating speed of the fan blades are in linear direct proportion.

When the fan works in the dust removal mode, the fan blades of the fan rotate (rotate reversely) in a second direction, and the second direction is opposite to the first direction. When the fan rotates along the second direction, the accumulated dust on the fan blades of the fan can be shaken off, and because the fan blades rotate along the second direction, the direction of the air flow is opposite to that of the air flow when the fan blades rotate along the first direction, and the dust on the radiating fins can be lifted off and blown away, so that the purpose of dust removal is achieved.

It should be noted that, the operation manner of the fan in the heat dissipation mode is only an example, and is not a limitation to the embodiments of the present disclosure.

Fig. 3 is a flowchart of a method for controlling a fan of an electronic device according to an embodiment of the present disclosure. As shown in fig. 3, the control method includes:

in step S11, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element are acquired while the fan is operating in the heat dissipation mode.

The ambient temperature refers to the temperature of the environment where the electronic device is located, and the temperature rise of the heating element refers to the numerical value that the temperature of the heating element is higher than the ambient temperature. The temperature of the heating element and the ambient temperature can be measured by a temperature detecting device (such as a temperature sensor), and then the temperature rise of the heating element can be obtained according to the ambient temperature and the temperature of the heating element, that is, the ambient temperature is subtracted from the temperature of the heating element, so that the temperature rise of the heating element is obtained. For the electronic equipment with the temperature detection function, the temperature of the heating element can also be directly acquired from the electronic equipment, and the temperature rise of the heating element can be obtained according to the difference value between the temperature of the heating element and the ambient temperature. For example, the temperature of the central processing unit of the notebook computer can be measured, so that the temperature of the central processing unit can be directly obtained from the notebook computer, and then the temperature rise of the central processing unit can be obtained according to the environmental temperature.

In executing step S11, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element may be continuously acquired while the fan is operating in the heat radiation mode, or the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element may be acquired at set intervals, for example, at intervals of 10 seconds, 20 seconds, or the like.

In step S12, it is determined whether dust removal is required according to the acquired ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset correspondence.

The corresponding relation is the corresponding relation among the environmental temperature, the temperature rise of the heating element and the power of the heating element when the fan works in the heat dissipation mode when the dust accumulation degree of the fan does not exceed the preset degree. The correspondence may be stored in a memory of the electronic device.

In step S13, when dust removal is required, the fan is controlled to operate in the dust removal mode.

After the situation that dust removal is needed is judged, the fan is controlled to rotate reversely, accumulated dust on fan blades of the fan can be shaken off, and dust on the radiating fins can be lifted off and blown away due to the fact that the direction of airflow after the fan rotates reversely is opposite to that during forward rotation, and therefore the purpose of dust removal is achieved.

Whether dust removal is needed is judged according to a preset corresponding relation through acquiring the ambient temperature, the temperature rise of the heating element and the power of the heating element in the working process of the electronic equipment, and when dust removal is needed, the fan is controlled to work in a dust removal mode, so that the electronic equipment can automatically remove dust when dust removal is needed, dust deposition on the fan can be timely and effectively removed, and normal work of the electronic equipment is ensured. And whether dust removal is needed or not is judged according to the preset corresponding relation, so that the judgment is more accurate.

Fig. 4 is a schematic diagram of a corresponding relationship provided in the embodiment of the present disclosure. Fig. 4 shows a relationship among an ambient temperature, a temperature rise of the heat generating element, and a power of the heat generating element when the fan operates in the heat radiating mode, when the dust deposition degree of the fan does not exceed a preset degree. As shown in fig. 4, the temperature rise is positively correlated with the power when the ambient temperature is constant. The correspondence may be obtained as follows:

when the dust accumulation degree of the fan does not exceed the preset degree, and the fan works in a heat dissipation mode, the power of the heating element is gradually changed at different environmental temperatures, and the environmental temperature, the temperature rise of the heating element and the power of the heating element are respectively recorded so as to obtain the corresponding relation. Optionally, the corresponding relationship may be obtained under the condition that the fan is free of dust. Alternatively, considering that it is difficult to create an environment completely free of dust deposition in practice, the preset degree may be a case where the thickness of the dust deposition does not exceed a certain thickness, for example, the preset degree may be a case where the thickness of the dust deposition does not exceed 0.01 mm. Alternatively, the preset degree may be a case where the deposited dust mass does not exceed a certain mass, for example, the preset degree may be a case where the deposited dust mass does not exceed 1 gram.

The correspondence may be obtained in a laboratory. For example, the laboratory temperature (i.e. the ambient temperature) is adjusted to 25 ℃, the heating element is controlled to operate, the power of the heating element is gradually increased to 15W, and in the process of gradually increasing the power of the heating element, a fixed wattage can be increased every time, for exampleEach increment is 1W, 2W, etc. The temperature of the heating element may be detected several times during the process of increasing the power of the heating element, for example, when the temperature of the element to be heated is stable (i.e., the temperature of the heating element does not change or the temperature change value is less than the set value within the set time period) when the heating element operates at 2W, the temperature value A is recorded₁At this time, the temperature rise is A₁-25 ℃; then the power of the heating element is increased to 4W, the temperature of the element to be heated is stable, and a temperature value A is recorded₂At this time, the temperature rise is A₂-25 ℃; then the power of the heating element is increased to 6W, the temperature of the element to be heated is stable, and a temperature value A is recorded₃At this time, the temperature rise is A₃-25 ℃ so as to obtain a temperature rise corresponding to different powers. Then the laboratory temperature is adjusted to other temperatures, for example 30 ℃, and then the temperature rises corresponding to different powers are obtained in sequence. By adjusting the temperature of the laboratory to different temperatures for many times, the corresponding relation among the ambient temperature, the temperature rise and the power within a certain ambient temperature range can be obtained.

Fig. 5 is a schematic diagram of a relationship between an ambient temperature, a temperature rise and power after dust deposition of a fan according to an embodiment of the disclosure. Fig. 5 shows a relationship among the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element in the case where the fan of the heat generating element has dust deposition. The correspondence may be obtained in a laboratory using an electronic component with dust deposited on the fan in the same manner as the correspondence shown in fig. 4.

Fig. 6 is a schematic diagram of a relationship between temperature rise and power provided by the embodiment of the present disclosure. The graph shows the temperature rise as a function of power at an ambient temperature of 25 c. As shown in fig. 6, temperature rise versus power is shown for three cases. Curve a can be obtained from fig. 4, curve b can be obtained from fig. 5, and curve c is a temperature rise versus power curve of a heat generating element of an electronic device having a lower degree of fan dusting than the fan dusting in fig. 5. Comparing the curve a, the curve b and the curve c, the actual power consumption of the heating element will be lower and lower under the same temperature rise along with the increase of the dust deposition, and the curve representing the relationship between the temperature rise and the power is closer to the horizontal axis.

As can be seen from fig. 4 and 5, the relationship between the ambient temperature, the temperature rise and the power is a curved surface, and in the case of dust deposition on the fan, the curved surface tends to be more and more flat along with the severity of the dust deposition. The dust accumulation condition of the air outlet fan can be judged according to the difference of the curved surfaces.

The patterns shown in fig. 4 and 5 are only a way of visually representing the relationship between the ambient temperature, the temperature rise, and the power, and in other possible implementations, the relationship between the ambient temperature, the temperature rise, and the power may also be recorded in a form of a table.

Fig. 7 is a flowchart of a method for controlling a fan of an electronic device according to an embodiment of the present disclosure. The method judges whether dust removal is needed according to the relation between the power of the heating element and the theoretical power. As shown in fig. 7, the control method includes:

in step S21, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element are acquired while the fan is operating in the heat dissipation mode.

In a possible implementation manner of the embodiment of the present disclosure, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element may be obtained by an external detection device, that is, may be obtained from other devices besides the electronic device.

Illustratively, the detection may be performed by a temperature detection device to obtain the ambient temperature. The temperature detection device may comprise a thermometer.

The temperature of the heating element can be obtained by detecting the heating element by a temperature detection device, and then the temperature rise of the heating element can be obtained by the difference between the temperature of the heating element and the ambient temperature. The temperature detection device that detects the heat generating element and the temperature detection device that detects the ambient temperature may be different temperature detection devices.

The heating element may be detected by a power detection device to derive the power of the heating element. The power detection device may comprise a power meter.

In another possible implementation manner of the embodiment of the present disclosure, the ambient temperature, the temperature of the heat generating element, and the power of the heat generating element may be directly read from the electronic device, so as to obtain the ambient temperature, the temperature rise, and the power. In many electronic devices, a temperature sensor is generally provided to detect the temperature of each heating element in the electronic device and the ambient temperature, so as to monitor the operating state of each heating element. For example, in a notebook computer, a temperature sensor is mounted on a motherboard, a central processing unit, a graphics card, a hard disk, and the like. A power detection device may be further provided in the electronic apparatus to detect the power of each heating element to monitor the operating state of each heating element. For example, in a notebook computer, a power detection device is disposed at a central processing unit, a graphics card, and the like.

When there are multiple heat generating elements in the electronic device, each heat generating element may be provided with a fan, or multiple heat generating elements may share one fan. When a plurality of heat generating elements share one fan, the temperature rise of the heat generating element and the power of the heat generating element may be the temperature rise and the power of one heat generating element among the plurality of heat generating elements. The selection can be made according to the importance of a plurality of heating elements, for example, when the motherboard and the cpu share one fan, the temperature rise of the heating element and the power of the heating element can be the temperature rise and the power of the cpu.

In step S22, the theoretical power corresponding to the ambient temperature and the temperature rise is determined in the heat dissipation mode according to the correspondence.

The theoretical power corresponding to the ambient temperature and the temperature rise is the power which the heating element needs to reach when the dust accumulation degree of the fan does not exceed the preset degree and the fan works in the heat dissipation mode at the same ambient temperature.

Illustratively, the ambient temperature T is acquired in step S21₁Temperature rise of Δ T₁Power of W₁. Referring to the corresponding relationship shown in fig. 4, it can be obtained that the dust deposition degree of the fan does not exceed the preset degree, and when the fan works in the heat dissipation mode, the environmental temperature is T₁Temperature rise up to Δ T₁When the theoretical power of the corresponding heating element is W₂。

In step S23, when the ratio of the power of the heating element to the theoretical power in the heat dissipation mode is lower than the first threshold, indicating that dust removal is required, step S24 is performed.

When the ratio of the power of the heating element to the theoretical power in the heat dissipation mode is not lower than the first threshold, it indicates that dust removal is not required, and the process returns to step S21.

As shown in fig. 4 and 5, at the same ambient temperature, when the temperature rises the same, comparing the power of the heating element with more dust deposition on the fan with the power of the heating element with the dust deposition degree of the fan not exceeding the preset degree, the power of the heating element is smaller, and when the dust deposition degree of the fan does not exceed the preset degree, the power of the heating element is taken as the theoretical power, so that the smaller the ratio of the power of the heating element to the theoretical power, the more serious the dust deposition is, and when the ratio is lower than the first threshold, it is indicated that the dust deposition reaches a certain degree, and dust removal is required.

Because the theoretical power is the power of the fan without dust deposition, at the same ambient temperature, as long as the dust deposition occurs on the fan, the power of the heating element is necessarily lower than the theoretical power to achieve the same temperature rise, that is, the ratio of the power of the heating element to the theoretical power is less than 1. Under the condition that the ambient temperature is not changed, when the temperature of the heating element rises, the temperature rise is increased, and the temperature change of the heating element lags behind the power change, so the theoretical power corresponding to the temperature rise at any time in the process of increasing the ambient temperature and the temperature rise is smaller than the actual power of the heating element, and the ratio of the power of the heating element to the theoretical power is larger than 1. The first threshold is therefore a positive number smaller than 1.

The first threshold may be 75% to 95%. The first threshold value may be set according to different requirements. For the heating element with higher heat dissipation requirement, the fan cannot be allowed to have more dust deposition, so the first threshold value can be set higher to increase the frequency of dust removal, for example, 90%. The first threshold may be set lower for heating elements with lower heat dissipation requirements to reduce the frequency of dust removal, e.g. 80%.

In step S24, the fan of the electronic device is controlled to operate in the dust removal mode.

When the fan works in the dust removal mode, the fan rotates reversely, accumulated dust on fan blades of the fan can be shaken off, and meanwhile, dust on the radiating fins can be lifted off and blown away, so that the purpose of removing dust is achieved.

In step S25, when the dust deposition degree of the fan does not exceed the preset degree, the temperature of the heating element is obtained when the fan operates in the heat dissipation mode.

The method of acquiring the temperature of the heat generating element in step S25 may be the same as that in step S21. And is not described in detail herein.

In step S26, when the temperature of the heat generating element rises to a preset threshold or the fan operates for a preset time period in the dust removal mode, step S27 is performed.

Otherwise, the process returns to step S24.

The fan has better radiating effect to the heating element only when corotation, and the fan reversal in the in-process of removing dust, weakens the radiating effect to the heating element, and the temperature of heating element can rise, because the heating element just can normally work when the temperature does not exceed a certain numerical value, in order to guarantee the normal work of heating element, will restrict the temperature of heating element in predetermineeing the threshold. When the temperature of the heating element rises to a preset threshold value in the dust removal process, the fan is controlled to rotate forwards to dissipate heat by suspending dust removal, so that the temperature of the heating element is reduced. The preset threshold value can be set according to different heating elements, wherein different heating elements can bear different temperatures.

For example, if the normal operating temperature of the central processing unit of the notebook computer is within 80 ℃, the dust removal can be suspended when the temperature of the heating element is detected to be increased to be over 80 ℃ in the dust removal process, and the fan is controlled to rotate forwards to dissipate heat, so that the temperature of the heating element is reduced, and the normal operation of the heating element is ensured.

In addition, even if the temperature of the heating element does not reach the preset threshold value, when the fan works in the dust removal mode for the preset time, the fan carries out dust removal to a sufficient extent, the dust removal mode can be ended, and the fan returns to work in the heat dissipation mode. The preset time period may be 20 seconds, 30 seconds, 1 minute, etc.

In step S27, the fan of the electronic device is controlled to operate in the heat dissipation mode.

When the fan works in the heat dissipation mode, the rotating speed of the fan can be controlled according to the ambient temperature and the temperature of the heating element. For example, under the condition of the same ambient temperature, the higher the temperature of the heating element is, the faster the rotation speed of the fan can be controlled, so as to increase the air output of the fan and improve the heat dissipation capability. Under the condition that the temperatures of the heating elements are the same, the higher the ambient temperature is, the faster the rotating speed of the fan can be controlled, so that the air output of the fan is increased, and the heat dissipation capability is improved.

Alternatively, when the temperature of the heat generating element rises to the preset threshold and the fan of the electronic device is controlled to operate in the heat dissipation mode, when the temperature of the heat generating element falls below the preset threshold during the operation in the heat dissipation mode, the process may return to step S23. Otherwise, the process returns to step S27.

After the dust removal is suspended, the heat dissipation is carried out on the heating element, the temperature of the heating element can be reduced, when the temperature of the heating element is reduced to be lower than a preset threshold value, whether dust removal is needed or not can be judged again, and if the dust removal is needed, the fan is controlled to rotate reversely to remove dust so as to continue the dust removal work.

Fig. 8 is a flowchart of a method for controlling a fan of another electronic device according to an embodiment of the present disclosure. The method is different from the method shown in fig. 7 in that whether dust removal is required is judged according to the relationship between the temperature rise of the heating element and the theoretical temperature rise. As shown in fig. 8, the control method includes:

in step S31, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element are acquired while the fan is operating in the heat dissipation mode.

Step S31 is the same as step S21 described above and will not be described in detail here.

In step S32, the theoretical temperature increases corresponding to the ambient temperature and the power in the heat dissipation mode are determined according to the correspondence.

The theoretical temperature rise corresponding to the ambient temperature and the power is that the dust accumulation degree of the fan does not exceed a preset degree, and when the fan works in a heat dissipation mode, the heating element works at the same power and the temperature of the heating element rises.

Illustratively, the ring is acquired in step S31Ambient temperature of T₁Temperature rise of Δ T₁Power of W₁. Referring to the corresponding relationship shown in fig. 4, it can be obtained that the dust deposition degree of the fan does not exceed the preset degree, and when the fan works in the heat dissipation mode, the environmental temperature is T₁Power of W₁When the theoretical temperature rise of the corresponding heating element is Δ T₂。

In step S33, when the ratio of the temperature rise of the heating element to the theoretical temperature rise in the heat dissipation mode is higher than the second threshold, it is determined that dust removal is required, and step S34 is performed.

And when the ratio of the temperature rise of the heating element in the heat dissipation mode to the theoretical temperature rise is not higher than the second threshold, judging that dust removal is not needed, and returning to the step S31.

As shown in fig. 4 and 5, at the same environmental temperature, when the power of the heating element is the same, the temperature rise of the heating element with more dust deposition on the fan is larger than the temperature rise of the heating element with the dust deposition degree on the fan not exceeding the preset degree, and when the dust deposition degree of the fan does not exceed the preset degree, the temperature rise of the heating element is used as the theoretical temperature rise, the larger the ratio of the temperature rise of the heating element to the theoretical temperature rise, the more serious the dust deposition is, and when the ratio is higher than the second threshold, it is indicated that the dust deposition reaches a certain degree, and dust removal is required.

Since the theoretical temperature rise is the power of the fan without dust deposition, the temperature rise of the heating element is inevitably higher than the theoretical temperature rise as long as dust deposition occurs in the fan at the same environmental temperature and the same power, and therefore the second threshold is a positive number greater than 1.

The second threshold may be 105% to 125%. The second threshold value may be set according to different requirements. For the heating element with higher heat dissipation requirement, the fan cannot be allowed to have more dust deposition, so the second threshold value can be set lower to increase the frequency of dust removal, for example, 100%. The second threshold may be set higher for heating elements with lower heat dissipation requirements to reduce the frequency of dust removal, e.g. 120%.

In step S34, the fan of the electronic device is controlled to operate in the dust removal mode.

Step S34 is the same as step S24 described above and will not be described in detail here.

In step S35, when the dust deposition degree of the fan does not exceed the preset degree, the temperature of the heating element is obtained when the fan operates in the heat dissipation mode.

Step S35 is the same as step S25 described above and will not be described in detail here.

In step S36, step S37 is performed when the temperature of the heat generating element rises to a preset threshold or the fan operates in the dust removal mode for a preset length of time, otherwise, it returns to step S34.

In step S37, the fan of the electronic device is controlled to operate in the heat dissipation mode.

Step S37 is the same as step S27 described above and will not be described in detail here.

Alternatively, when the temperature of the heat generating element rises to the preset threshold and the fan of the electronic device is controlled to operate in the heat dissipation mode, when the temperature of the heat generating element falls below the preset threshold during the operation in the heat dissipation mode, the process may return to step S33. Otherwise, the process returns to step S37.

Fig. 9 is a flowchart of a method for controlling a fan of another electronic device according to an embodiment of the present disclosure. The method is different from the method shown in fig. 7 in that whether dust removal is required is judged according to the relationship between the ambient temperature and the theoretical ambient temperature. As shown in fig. 9, the control method includes:

in step S41, the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element are acquired while the fan is operating in the heat dissipation mode.

Step S41 is the same as step S21 described above and will not be described in detail here.

In step S42, the theoretical ambient temperature corresponding to the temperature rise and the power in the heat dissipation mode is determined according to the correspondence.

The theoretical environmental temperature corresponding to the temperature rise and the power is the environmental temperature at which the dust deposition degree of the fan does not exceed a preset degree, and when the fan works in a heat dissipation mode, the heating element works with the power, so that the heating element reaches the temperature rise and is located.

Illustratively, the ambient temperature is acquired in step S41T₁Temperature rise of Δ T₁Power of W₁. Referring to the corresponding relationship shown in fig. 4, it can be obtained that the dust deposition degree of the fan does not exceed the preset degree, and when the fan operates in the heat dissipation mode, the power is W₁Temperature rise of the heating element is Delta T₂At a theoretical ambient temperature of T₂。

In step S43, when the ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is smaller than the third threshold, it is determined that dust removal is required, and step S44 is performed.

And when the ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is not less than the third threshold, determining that dust removal is not required, and returning to step S41.

Referring to fig. 4 and 5, when the two heat generating elements operate at the same power, if the generated temperature increases the same, the ambient temperature of the heat generating element with more dust deposition on the fan is lower than the ambient temperature of the heat generating element with the dust deposition degree not exceeding the preset degree. When the dust deposition degree of the fan does not exceed the preset degree, the environmental temperature of the heating element is the theoretical environmental temperature, the smaller the ratio of the environmental temperature of the heating element to the theoretical environmental temperature is, the more serious the dust deposition is, and when the ratio is smaller than a third threshold value, the dust deposition reaches a certain degree, and dust removal is needed.

Since the heating element is operated in an environment where the ambient temperature is lower than the theoretical ambient temperature whenever the fan is dusted in order to equalize the generated temperature rise under the same power, the third threshold value is a positive number smaller than 1.

The third threshold may be 75% to 95%. The third threshold value may be set according to different requirements. For the heating element with higher heat dissipation requirement, the fan cannot be allowed to have more dust deposition, so the third threshold value can be set higher to increase the frequency of dust removal, for example, 90%. The third threshold may be set lower for heating elements with lower heat dissipation requirements to reduce the frequency of dust removal, e.g. 80%.

In step S44, the fan of the electronic device is controlled to operate in the dust removal mode.

Step S44 is the same as step S24 described above and will not be described in detail here.

In step S45, when the dust deposition degree of the fan does not exceed the preset degree, the temperature of the heating element is obtained when the fan operates in the heat dissipation mode.

Step S45 is the same as step S25 described above and will not be described in detail here.

In step S46, step S47 is performed when the temperature of the heat generating element rises to a preset threshold or the fan operates in the dust removal mode for a preset length of time, otherwise, it returns to step S44.

In step S47, the fan of the electronic device is controlled to operate in the heat dissipation mode.

Step S47 is the same as step S27 described above and will not be described in detail here.

Alternatively, when the temperature of the heat generating element rises to the preset threshold and the fan of the electronic device is controlled to operate in the heat dissipation mode, when the temperature of the heat generating element falls below the preset threshold during the operation in the heat dissipation mode, the process may return to step S43. Otherwise, the process returns to step S47.

Alternatively, steps S11, S21, S31, S41 may be performed when any of the following conditions is satisfied:

the power of the heating element is lower than a preset power value.

The operation time of the heating element is lower than a preset time length value.

In one possible implementation manner of the embodiment of the present disclosure, the steps S11, S21, S31, S41 may be performed when the operation time length of the heating element is lower than the preset time length value. The operation duration is the duration of continuous operation of the heating element after the electronic equipment is started. Illustratively, the preset time length value may be 1 minute or 2 minutes, and may be executed after the electronic device is turned on for a while. Since the operation time of the heating element is short and the temperature of the heating element is low when the electronic device is started, the control method shown in fig. 3 and 7-9 is performed at this time, so that the situation that the dust removal process is suspended due to the fact that the temperature of the heating element rises to the preset threshold value can be avoided, and the improvement of the dust removal efficiency is facilitated.

In another possible implementation manner of the embodiment of the present disclosure, the steps S11, S21, S31, S41 may be performed when the power of the heating element is lower than a preset power value. Illustratively, the power preset value may be 30% to 50% of the rated power of the heating element. Since the temperature rise is lower and the temperature of the heating element is farther from the maximum temperature (i.e., the preset threshold) that the heating element can endure when the power of the heating element is lower under the condition of a constant ambient temperature, the control method shown in fig. 3 and 7 to 9 is performed at this time, so that the possibility that the dust removal process is suspended when the temperature of the heating element rises to the preset threshold can be reduced, and the efficiency of dust removal can be improved.

Fig. 10 is a schematic structural diagram of a control device of a fan of an electronic device according to an embodiment of the present disclosure. As shown in fig. 10, the control apparatus 100 includes an acquisition module 10, a determination module 20, and a control module 30. The obtaining module 10 is configured to obtain an ambient temperature, a temperature rise of the heating element, and a power of the heating element when the fan operates in the heat dissipation mode. The determining module 20 is configured to determine whether dust removal is required according to the obtained ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset corresponding relationship, where the corresponding relationship is a corresponding relationship between the ambient temperature, the temperature rise of the heating element, and the power of the heating element when the fan operates in the heat dissipation mode when the dust deposition degree of the fan does not exceed a preset degree. The control module 30 is used to control the fan to operate in a dust removal mode when dust removal is required.

According to the embodiment of the dust removal method and device, the environment temperature, the temperature rise of the heating element and the power of the heating element are obtained in the working process of the electronic equipment, whether dust removal is needed is judged according to the preset corresponding relation, and the fan is controlled to work in the dust removal mode when dust removal is needed, so that the electronic equipment can automatically remove dust when dust removal is needed, dust deposition on the fan can be timely and effectively removed, and normal work of the electronic equipment is guaranteed.

In a possible implementation manner of the embodiment of the present disclosure, the control device 100 may further include a storage module 40, where the storage module 40 is configured to store a corresponding relationship, and the corresponding relationship is obtained by:

when the dust accumulation degree of the fan does not exceed the preset degree, and the fan works in a heat dissipation mode, the power of the heating element is gradually changed at different environmental temperatures, and the environmental temperature, the temperature rise of the heating element and the power of the heating element are respectively recorded so as to obtain the corresponding relation. The correspondence may be obtained in a laboratory. The manner of specifically obtaining the correspondence relationship may refer to the foregoing embodiments. The correspondence relationship can be described with reference to fig. 4.

Optionally, the determining module 20 may be configured to determine theoretical power corresponding to the ambient temperature and the temperature rise in the heat dissipation mode according to the corresponding relationship, and determine that dust removal is required when a ratio of the power of the heating element in the heat dissipation mode to the theoretical power is lower than a first threshold, where the first threshold is a positive number smaller than 1. At this time, the control device 100 may adopt the control method shown in fig. 7, which is detailed in the foregoing embodiment.

Optionally, the determining module 20 may be configured to determine a theoretical temperature rise corresponding to the ambient temperature and the power in the heat dissipation mode according to the corresponding relationship, and determine that dust removal is required when a ratio of the temperature rise of the heating element in the heat dissipation mode to the theoretical temperature rise is higher than a second threshold, where the second threshold is a positive number greater than 1. At this time, the control device 100 may adopt the control method shown in fig. 8, which is detailed in the foregoing embodiment.

Optionally, the determining module 20 is configured to determine a theoretical environment temperature corresponding to the temperature rise and the power in the heat dissipation mode according to the corresponding relationship, and determine that dust removal is required when a ratio of the environment temperature to the theoretical environment temperature in the heat dissipation mode is smaller than a third threshold, where the third threshold is a positive number smaller than 1. At this time, the control device 100 may adopt a control method as shown in fig. 9, which is detailed in the foregoing embodiment.

In a possible implementation manner of the embodiment of the present disclosure, the obtaining module 10 may also be used for obtaining the temperature of the heating element. The control module 30 may also be configured to control the fan of the electronic device to operate in the heat dissipation mode when the temperature of the heating element rises to a preset threshold or the fan operates in the dust removal mode for a preset duration in the process of controlling the fan of the electronic device to operate in the dust removal mode. Because the fan has better heat dissipation effect to the heating element only when corotation, and the fan reversal in the in-process of removing dust, the heat dissipation effect to the heating element weakens, and the temperature of heating element can rise, because the heating element can normally work only when the temperature does not exceed a certain numerical value, in order to guarantee the normal work of heating element, will restrict the temperature of heating element in predetermineeing the threshold. When the temperature of the heating element rises to a preset threshold value in the dust removal process, the fan is controlled to rotate forwards to dissipate heat by suspending dust removal, so that the temperature of the heating element is reduced. The preset threshold value can be set according to different heating elements, wherein different heating elements can bear different temperatures.

In a possible implementation manner of the embodiment of the present disclosure, the obtaining module 10 may obtain the ambient temperature, the temperature rise of the heating element, and the power of the heating element by detecting the ambient temperature, the temperature rise of the heating element, and the power of the heating element. The acquisition module 10 may include a temperature detection device (e.g., thermometer, temperature sensor) and a power detection device (e.g., power meter).

In another possible implementation manner of the embodiment of the present disclosure, the obtaining module 10 may directly read the ambient temperature, the temperature of the heat generating element, and the power of the heat generating element from the electronic device, so as to obtain the ambient temperature, the temperature rise, and the power.

Taking a notebook computer as an example, the obtaining module 10 may include an EC (embedded controller) and a BIOS (Basic Input Output System), where the EC may directly obtain an ambient temperature and a temperature of a heating element detected by a sensor in the notebook computer, and the BIOS may directly obtain a power of the heating element detected by the sensor in the notebook computer.

Alternatively, the determination module 20 and the control module 30 may both include an EC, and in a notebook computer, the EC may perform fan control.

Optionally, the determining module 20 may be further configured to determine whether dust removal needs to be performed again when the temperature of the heating element drops below a preset threshold; the control module can also be used for controlling the fan of the electronic equipment to work in the dust removal mode again when dust removal needs to be carried out again. After the temperature of the heating element is reduced to be lower than the preset threshold value, whether dust removal is needed or not can be judged again, and if the dust removal is needed, the fan is controlled to work in a dust removal mode so as to continue dust removal.

Fig. 11 is a block diagram illustrating a control apparatus for a fan of an electronic device according to an exemplary embodiment. For example, the control device 700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like.

Referring to fig. 11, the control device 700 may include one or more of the following components: a processing component 702, a memory 704, a power component 706, a multimedia component 708, an audio component 710, an input/output (I/O) interface 712, a sensor component 714, and a communication component 716.

The processing component 702 generally controls overall operation of the control device 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing element 702 may include one or more processors 720 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 702 may include one or more modules that facilitate interaction between the processing component 702 and other components. For example, the processing component 702 can include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.

The memory 704 is configured to store various types of data to support operations at the control device 700. Examples of such data include instructions for any application or method operating on the control device 700, contact data, phonebook data, messages, pictures, videos, and the like. The memory 704 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power component 706 provides power to the various components of the control device 700. The power components 706 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the control device 700.

The multimedia component 708 includes a screen between the control device 700 and a user that provides an output interface, in some embodiments, the screen may include a liquid crystal display (L CD) and a Touch Panel (TP). if the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user.

The audio component 710 is configured to output and/or input audio signals. For example, the audio component 710 includes a Microphone (MIC) configured to receive external audio signals when the control device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 704 or transmitted via the communication component 716. In some embodiments, audio component 710 also includes a speaker for outputting audio signals.

The I/O interface 712 provides an interface between the processing component 702 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 714 includes one or more sensors for providing status assessment of various aspects to the control device 700. For example, the sensor assembly 714 may detect an open/closed state of the control device 700, the relative positioning of the components, such as a display and keypad of the control device 700, the sensor assembly 714 may also detect a change in position of the control device 700 or a component of the control device 700, the presence or absence of user contact with the control device 700, the orientation or acceleration/deceleration of the control device 700, and a change in temperature of the control device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 714 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 716 is configured to facilitate wired or wireless communication between the control apparatus 700 and other devices. The control device 700 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication section 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a Near Field Communication (NFC) module to facilitate short-range communications.

In an exemplary embodiment, the control device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), programmable logic devices (P L D), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the methods shown in any of fig. 3, 7-9.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 704 comprising instructions, executable by the processor 720 of the control device 700 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

In an exemplary embodiment, there is also provided a non-transitory computer readable storage medium having instructions therein which, when executed by a processor of a control apparatus, enable the control apparatus to perform the method illustrated in any one of fig. 3, 7-9.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A control method of a fan of an electronic apparatus having a heat generating element and the fan, the control method comprising:

judging whether the fan needs to be dedusted according to the acquired environment temperature, the acquired temperature rise of the heating element, the acquired power of the heating element and a preset corresponding relation, wherein the corresponding relation is the corresponding relation among the environment temperature, the acquired temperature rise of the heating element and the acquired power of the heating element when the fan works in the heat dissipation mode when the dust deposition degree of the fan does not exceed the preset degree;

and when the fan needs to be dedusted, controlling the fan to work in a dedusting mode.

2. The control method according to claim 1, wherein the determining whether the fan needs to be dedusted according to the acquired ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset correspondence relationship includes:

and when the ratio of the power of the heating element to the theoretical power in the heat dissipation mode is lower than a first threshold value, judging that dust removal is needed, wherein the first threshold value is a positive number smaller than 1.

3. The control method according to claim 1, wherein the determining whether the fan needs to be dedusted according to the acquired ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset correspondence relationship includes:

and when the ratio of the temperature rise of the heating element in the heat dissipation mode to the theoretical temperature rise is higher than a second threshold value, judging that dust removal is needed, wherein the second threshold value is a positive number larger than 1.

4. The control method according to claim 1, wherein the determining whether the fan needs to be dedusted according to the acquired ambient temperature, the temperature rise of the heating element, the power of the heating element, and a preset correspondence relationship includes:

and when the ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is smaller than a third threshold, determining that dust removal is required, wherein the third threshold is a positive number smaller than 1.

5. The control method according to any one of claims 1 to 4, characterized by further comprising:

6. The control method according to any one of claims 1 to 4, characterized by further comprising:

in the process of controlling the fan of the electronic equipment to work in the dust removal mode, when the temperature of the heating element rises to a preset threshold value or the fan works in the dust removal mode for a preset time length, the fan of the electronic equipment is controlled to work in the heat dissipation mode.

7. The control method according to any one of claims 1 to 4, wherein the obtaining of the ambient temperature, the temperature rise of the heat generating element and the power of the heat generating element when the fan operates in the heat dissipation mode comprises:

the power of the heating element is lower than a preset power value;

8. A control apparatus for a fan of an electronic device having a heat generating element and the fan, comprising:

the judging module is used for judging whether the fan needs to be dedusted according to the acquired environment temperature, the acquired temperature rise of the heating element, the acquired power of the heating element and a preset corresponding relation, wherein the corresponding relation is the corresponding relation among the environment temperature, the acquired temperature rise of the heating element and the acquired power of the heating element when the fan works in the heat dissipation mode when the dust accumulation degree of the fan does not exceed the preset degree;

and the control module is used for controlling the fan to work in a dust removal mode when the fan needs to be subjected to dust removal.

9. The control device according to claim 8, wherein the determining module is configured to determine theoretical power corresponding to the ambient temperature and the temperature rise in the heat dissipation mode according to the correspondence, and determine that dust removal is required when a ratio of power of the heating element in the heat dissipation mode to the theoretical power is lower than a first threshold, where the first threshold is a positive number smaller than 1.

10. The control device according to claim 8, wherein the determining module is configured to determine a theoretical temperature rise corresponding to the ambient temperature and the power in the heat dissipation mode according to the correspondence, and determine that dust removal is required when a ratio of the temperature rise of the heat generating element in the heat dissipation mode to the theoretical temperature rise is higher than a second threshold, where the second threshold is a positive number greater than 1.

11. The control device according to claim 8, wherein the determination module is configured to determine a theoretical ambient temperature corresponding to the temperature rise and the power in the heat dissipation mode according to the correspondence, and determine that dust removal is required when a ratio of the ambient temperature to the theoretical ambient temperature in the heat dissipation mode is smaller than a third threshold, where the third threshold is a positive number smaller than 1.

12. The control device according to any one of claims 8 to 11, further comprising a storage module configured to store the correspondence, wherein the correspondence is obtained by:

13. The control device according to any one of claims 8 to 11, wherein the control module is further configured to, in a process of controlling the fan of the electronic device to operate in the dust removal mode, control the fan of the electronic device to operate in the heat dissipation mode when a temperature of the heat generating element rises to a preset threshold or the fan operates in the dust removal mode for a preset time.

14. The control device of claim 13, wherein the obtaining module is configured to obtain the ambient temperature, the temperature rise of the heat generating element, and the power of the heat generating element when any of the following conditions is satisfied when the fan operates in the heat dissipation mode:

the power of the heating element is lower than a preset power value;

15. A control apparatus for a fan of an electronic device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of the method of controlling a fan of an electronic device according to any of claims 1 to 7.

16. A storage medium, characterized in that the storage medium comprises at least one instruction which, when executed by a processor, performs the steps of the method of controlling a fan of an electronic device according to any one of claims 1 to 7.