WO2020228790A1

WO2020228790A1 - Fan speed control method and electronic device

Info

Publication number: WO2020228790A1
Application number: PCT/CN2020/090362
Authority: WO
Inventors: 刘毅; 王剑亮; 李萍萍; 张治国
Original assignee: 华为技术有限公司
Priority date: 2019-05-15
Filing date: 2020-05-14
Publication date: 2020-11-19
Also published as: CN111949093A; CN111949093B

Abstract

A fan speed control method and an electronic device. The electronic device comprises a controller, a chip, a fan (197), and a thermistor (196). The thermistor (196) is used for detecting the temperature of a component located around the chip in the electronic device. The method comprises: the controller obtains a first temperature detected by the thermistor (196); the controller determines a speed of the fan (197) according to the first temperature; the controller controls the fan (197) to rotate according to the determined speed. In the method, because the change of the first temperature detected by the thermistor (196) is relatively stable, and the controller controls the speed of the fan (197) according to the first temperature, the speed of the fan (197) would not change suddenly and instantly, thereby avoiding the problem of sudden increase of the noise of the fan (197).

Description

Fan speed control method and electronic equipment

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China with the application number 201910408136.9 on May 15, 2019, and the priority of the Chinese patent application with the title of "a method for controlling fan speed and electronic equipment" , Its entire content is incorporated in this application by reference.

Technical field

This application relates to the field of terminal technology, and in particular to a method for controlling the speed of a fan and electronic equipment.

Background technique

As electronic devices (such as tablets, personal computers, etc.) become smaller and smaller, the integration of electronic components continues to increase, and the power consumption continues to increase, resulting in greater heat generated by electronic devices. If the heat of electronic devices cannot be dissipated in time , May cause damage to some components in electronic equipment. Therefore, the electronic equipment needs to be cooled down.

Currently, a fan can be provided in an electronic device, and the temperature of the electronic device can be cooled by the fan. Generally, electronic devices adjust the fan speed according to the temperature of the chip inside the electronic device. For example, when the temperature of the chip increases, the fan speed increases, and when the chip temperature decreases, the fan speed decreases. Since the temperature of the chip sometimes changes instantaneously, if the fan is controlled according to the temperature of the chip, the speed of the fan will increase instantaneously, which will cause the noise of the fan to increase suddenly, thereby affecting the user experience.

Summary of the invention

The embodiments of the present application provide a method for controlling the rotation speed of a fan and an electronic device, so as to avoid sudden changes in the rotation speed of the fan in the electronic device, which may lead to sudden changes in noise, and help improve user experience.

In the first aspect, an embodiment of the present application provides a fan speed control method, which can be executed by an electronic device with a fan, such as a mobile phone, an ipad, a notebook computer, and the like. Wherein, the electronic device includes a controller, a chip, a fan, and a thermistor, and the thermistor is used to detect the temperature of components located around the chip in the electronic device, and the method includes: the controller Obtain the first temperature detected by the thermistor; the controller determines the rotation speed of the fan according to the first temperature; the controller controls the fan to rotate at the determined rotation speed.

In the embodiment of the present application, after the controller obtains the first temperature detected by the thermistor, it controls the rotation speed of the fan according to the first temperature. Since the change of the first temperature detected by the thermistor is relatively stable, the controller controls the fan speed according to the first temperature, and the fan speed will not change instantaneously. On the one hand, the controller will not instantaneously control the fan to reduce the speed, causing electronic Before the other peripheral hardware inside the device has time to cool down, the fan speed is reduced, which is not conducive to the heat dissipation of other peripheral hardware. On the other hand, it can prevent the controller from controlling the fan to increase the rotation speed instantly, causing the problem of sudden increase in noise.

In a possible design, before the controller obtains the first temperature detected by the thermistor, the controller may also determine that the power consumption of the electronic device is greater than a first power consumption threshold.

In the embodiment of the present application, when the electronic device determines that the current power consumption is greater than the first power consumption threshold, that is, when it enters a high power consumption state, it may control the rotation speed of the fan according to the temperature of the thermistor. On the one hand, it can prevent the controller from controlling the fan to reduce the speed instantly, causing the peripheral hardware inside the electronic device except the chip to have time to cool down, and the fan speed is reduced, which is not conducive to the heat dissipation of other peripheral hardware. On the other hand, it can prevent the controller from controlling the fan to increase the rotation speed instantly, causing the problem of sudden increase in noise.

In a possible design, the controller determining the rotation speed of the fan according to the first temperature includes: if the first temperature is greater than a first temperature threshold, the controller determining the rotation speed of the fan Increase to the first speed; if the first temperature is less than the second temperature threshold, the controller determines that the speed of the fan is reduced to the second speed; if the first temperature is greater than or equal to the second temperature threshold, When the temperature is less than or equal to the first temperature threshold, the controller determines that the rotation speed of the fan does not change.

In the embodiment of the present application, the controller compares the first temperature with the first temperature threshold and the second temperature threshold, and when the controller determines that the first temperature is greater than the first temperature threshold, the controller adjusts the rotation speed of the fan to increase to the first rotation speed, It can avoid the sudden increase of the fan speed. When the controller determines that the first temperature is less than the second temperature threshold, the controller adjusts the rotation speed of the fan to decrease to the second rotation speed, which can avoid the sudden decrease in the rotation speed of the fan. When the controller determines that the first temperature is within the range of the first temperature and the second temperature threshold, the controller controls the rotation speed of the fan to be unchanged, so that the fan can heat the electronic device at the current rotation speed. It should be understood that the specific values of the first temperature threshold and the second temperature threshold are not limited in the embodiment of the present application.

In a possible design, the controller determining the rotation speed of the fan according to the first temperature includes: if the first temperature is greater than a first temperature threshold, the controller determining the rotation speed of the fan Increase to a first rotation speed; if the first temperature is less than or equal to the first temperature threshold, the controller determines the rotation speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature , The second temperature is the internal temperature of the chip.

In the embodiment of the present application, when the controller determines that the first temperature is less than or equal to the first temperature threshold, the controller adjusts the rotation speed of the fan according to the power consumption of the electronic device, the first temperature, and the second temperature. For example, the controller can determine whether the electronic device is in a high power consumption state or a low power consumption state according to the power consumption of the electronic device, and adopt different strategies in different power consumption states. For example, in a high power consumption state, the rotation speed is adjusted according to the first temperature, and in a low power consumption state, the rotation speed of the fan is adjusted according to the second temperature. This method can realize flexible control of the fan speed in different scenarios.

In a possible design, the controller determines the speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature, including: when the power consumption of the electronic device is greater than the first temperature When the power consumption threshold is lower than the second temperature threshold, it is determined that the rotation speed of the fan is reduced to the second rotation speed; the second temperature threshold is less than the first temperature threshold; and/or when the When the power consumption of the electronic device is less than the first power consumption threshold, and the second temperature is less than the third temperature threshold, it is determined that the rotation speed of the fan is reduced to a third rotation speed, and the third temperature threshold is less than the first temperature threshold. A temperature threshold.

In the embodiment of the present application, when the electronic device is in a high power consumption state, the rotation speed of the fan is controlled to decrease to the second rotation speed according to the temperature of the thermistor, which can avoid the sudden decrease of the rotation speed of the fan and help the heat dissipation of internal components of the electronic device. When the electronic device is in a low-power state, the fan speed is controlled according to the internal temperature of the chip to be low. Since the internal temperature of the chip changes quickly, under low power consumption, the fan speed is controlled according to the second temperature, so that the controller can reduce the speed quickly The speed of the fan saves resources.

In a possible design, the chip and the thermistor are arranged on the same circuit board in the electronic device, and the thermistor detects the temperature of the chip by detecting the temperature of the circuit board. The temperature of the component.

It should be understood that when the chip and the thermistor are provided on the same circuit board in the electronic device, the thermistor can detect the temperature of the circuit board where the chip is located. When the internal temperature of the chip increases, the temperature of the circuit board will increase accordingly, but since the heat transfer takes a while, the temperature of the circuit board will not increase instantaneously, so the temperature detected by the thermistor will not instantaneously Increase, so the temperature detected by the thermal electron is relatively warmer than the temperature change inside the chip. If the electronic device controls the fan speed through the temperature of the thermistor, it will not control the sudden change of the fan speed.

In the second aspect, an electronic device is also provided, including a controller, a chip, a fan, and a thermistor. Wherein, the fan is used to dissipate heat from physical devices in the electronic device when rotating, and the physical devices include the chip; the thermistor is used to detect that the chip is located in the electronic device The temperature of peripheral components; the controller is used to obtain the first temperature detected by the thermistor, and determine the rotation speed of the fan according to the first temperature; and control the fan according to the determined Speed rotation.

In a possible design, before the controller is used to determine the rotation speed of the fan according to the first temperature, it further determines that the power consumption of the electronic device is greater than a first power consumption threshold.

In a possible design, when the controller is used to determine the rotation speed of the fan according to the first temperature, it is specifically configured to: if the first temperature is greater than a first temperature threshold, determine the fan If the first temperature is less than the second temperature threshold, it is determined that the fan speed is reduced to the second speed; if the first temperature is greater than or equal to the second temperature threshold and less than When it is equal to the first temperature threshold, it is determined that the rotation speed of the fan does not change.

In a possible design, when the controller is used to determine the rotation speed of the fan according to the first temperature, it is specifically configured to: if the first temperature is greater than a first temperature threshold, determine the fan If the first temperature is less than or equal to the first temperature threshold, the rotation speed of the fan is determined according to the power consumption of the electronic device, the first temperature and the second temperature, so The second temperature is the internal temperature of the chip.

In a possible design, when the controller is used to determine the speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature, it is specifically used to: When the power consumption of is greater than a first power consumption threshold and the first temperature is less than a second temperature threshold, determining that the rotation speed of the fan is reduced to a second rotation speed; the second temperature threshold is less than the first temperature threshold; And/or when the power consumption of the electronic device is less than the first power consumption and the second temperature is less than a third temperature threshold, it is determined that the rotation speed of the fan is reduced to a third rotation speed, and the third temperature The threshold is less than the first temperature threshold.

In a third aspect, an electronic device is also provided, including at least one processor and memory. The memory is used to store one or more computer programs; when the one or more computer programs stored in the memory are executed by the at least one processor, the electronic device can realize the first aspect or any one of the first aspects. Design method.

In a fourth aspect, an electronic device is also provided, and the electronic device includes a module/unit that executes the first aspect or any one of the possible design methods of the first aspect. These modules/units can be realized by hardware, or by hardware executing corresponding software.

In a fifth aspect, a computer-readable storage medium is also provided. The computer-readable storage medium includes a computer program. When the computer program runs on an electronic device, the electronic device executes the first aspect or the above-mentioned first aspect. Any possible design method.

In a sixth aspect, a program product is also provided, which when the program product runs on an electronic device, causes the electronic device to execute the first aspect or any one of the possible design methods of the first aspect.

In a seventh aspect, a chip is also provided, which is coupled with a memory in an electronic device, and is used to call a computer program stored in the memory and execute the first aspect of the embodiments of the present application and any possible design technology of the first aspect Solution: In the embodiments of this application, "coupled" means that two components are directly or indirectly combined with each other.

Description of the drawings

FIG. 1 is a schematic structural diagram of a mobile phone provided by an embodiment of this application;

FIG. 2 is a schematic structural diagram of a mobile phone 100 according to an embodiment of the application;

FIG. 3 is a schematic flowchart of a fan control method provided by an embodiment of the application;

FIG. 4 is a schematic flowchart of another fan control method provided by an embodiment of the application;

FIG. 5 is a schematic structural diagram of another mobile phone 100 according to an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.

Hereinafter, some terms involved in the embodiments of the present application will be explained first, so that those skilled in the art can easily understand.

(1) The electronic devices involved in the embodiments of the present application may also be referred to as user equipment (UE), such as smart phones, tablet computers, notebook computers, various wearable devices, vehicle-mounted devices, and computers. In some embodiments of the present application, the electronic device is a portable device including a fan, such as a mobile phone, a tablet computer, a wearable device (such as a smart watch), and the like. Exemplary embodiments of portable devices include but are not limited to carrying

Or portable devices with other operating systems. The above-mentioned portable device may also be other portable devices, as long as it includes a fan and can realize the function of controlling the speed of the fan. It should also be understood that in some other embodiments of the present application, the above-mentioned electronic device may not be a portable device, but a desktop computer that includes a fan and can control the speed of the fan.

(2) Various applications (application, app for short) can be installed in the electronic device in (1) above, and the app is a software program that can implement one or more specific functions. For example, camera applications, SMS applications, MMS applications, various email applications, WeChat, Tencent chat software (QQ), WhatsApp Messenger, Line, photo sharing (instagram), Kakao Talk, DingTalk, etc. The applications mentioned in the following can be applications that have been installed when the electronic device leaves the factory, or applications that the user downloads from the network or obtained from other electronic devices during the use of the electronic device (for example, applications sent by other electronic devices) .

(3) The junction temperature of the chip involved in the embodiment of the present application is the internal temperature of the chip. For example, when the chip is a central processing unit (CPU), the junction temperature of the chip is characterized as the temperature inside the CPU. When the chip is a graphics processing unit (GPU), the junction temperature of the chip is characterized as the temperature inside the GPU. In the following, the chip is the CPU as an example. It should be noted that the name "chip junction temperature" is not limited in this article, and other names can be used as long as it characterizes the temperature inside the chip.

(4) The transient overclocking of the chip involved in the embodiment of the present application is characterized by the chip running at a frequency exceeding the rated operating frequency at a certain moment. Generally, when electronic devices are running high-power applications, transient overclocking occurs. When the chip is overclocked transiently, more heat will be generated inside the chip instantaneously, that is, the junction temperature of the chip will rise instantaneously. It should be noted that the name "transient overclocking of the chip" is not limited in this article, and it can also be other names, as long as it characterizes that the chip exceeds the rated operating frequency at a certain moment.

Hereinafter, taking the electronic device as a mobile phone as an example, an application scenario that can be implemented in the embodiment of the present application is introduced. As shown in FIG. 1, it is a schematic structural diagram of a mobile phone.

As shown in FIG. 1, the mobile phone 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, and a battery 142, Antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone interface 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, Display screen 194, subscriber identification module (SIM) card interface 195, thermistor 196, fan 197, etc. The sensor module 180 may include a fingerprint sensor 180A, a touch sensor 180B, etc. The type and number of sensors are not limited here.

The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), and an image signal processor. (image signal processor, ISP), memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (NPU), central processing Central processing unit (CPU), embedded controller (EC), etc. Among them, the different processing units may be independent devices or integrated in one or more processors.

Among them, the embedded controller may be the nerve center and command center of the mobile phone 100. The embedded controller can generate operation control signals according to the instruction operation code and timing signals, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 110 to store instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory can store instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to use the instruction or data again, it can be directly called from the memory. Repeated accesses are avoided, the waiting time of the processor 110 is reduced, and the efficiency of the system is improved.

The processor 110 may run the software code/module of the method for controlling the fan provided in the embodiment of the present application to control the rotation speed of the fan 197. The specific process will be described in detail later.

The USB interface 130 is an interface that complies with the USB standard specification, and specifically may be a Mini USB interface, a Micro USB interface, a USB Type C interface, and so on. The USB interface 130 can be used to connect a charger to charge the mobile phone 100, and can also be used to transfer data between the mobile phone 100 and peripheral devices.

The charging management module 140 is used to receive charging input from the charger. The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160.

The wireless communication function of the mobile phone 100 can be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor, and the baseband processor. The antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the mobile phone 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna can be used in combination with a tuning switch.

The mobile communication module 150 may provide a wireless communication solution including 2G/3G/4G/5G and the like applied on the mobile phone 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves by the antenna 1, and perform processing such as filtering, amplifying and transmitting the received electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor, and convert it into electromagnetic waves for radiation via the antenna 1. In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110. In some embodiments, at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be provided in the same device.

The wireless communication module 160 can provide applications on the mobile phone 100 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), and global navigation satellite systems. (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110, perform frequency modulation, amplify it, and convert it into electromagnetic wave radiation via the antenna 2.

In some embodiments, the antenna 1 of the mobile phone 100 is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the mobile phone 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, etc. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite-based augmentation systems (SBAS).

The display screen 194 is used to display the display interface of the application and the like. The display screen 194 includes a display panel. The display panel can adopt liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode or active-matrix organic light-emitting diode (active-matrix organic light-emitting diode). AMOLED, flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (QLED), etc. In some embodiments, the mobile phone 100 may include one or N display screens 194, and N is a positive integer greater than one.

The camera 193 is used to capture still images or videos, and may include a front camera and a rear camera. The internal memory 121 may be used to store computer executable program code, where the executable program code includes instructions. The processor 110 executes various functional applications and data processing of the mobile phone 100 by running instructions stored in the internal memory 121. The internal memory 121 may include a storage program area and a storage data area. Among them, the storage program area can store an operating system, and software codes of at least one application (such as an iQiyi application, a WeChat application, etc.). The data storage area can store data (such as images, videos, etc.) generated during the use of the mobile phone 100. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), etc. In the embodiment of the present application, the internal memory 121 may store the software code/module of the fan control method provided in the embodiment of the present application. When the processor 110 runs the software code/module, the process of the fan control method may be executed to control the fan. The purpose of the speed.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the mobile phone 100. The external memory card communicates with the processor 110 through the external memory interface 120 to realize the data storage function. For example, save pictures, videos and other files in an external memory card. Of course, the software codes/modules of the fan control method provided in the embodiments of the present application can also be stored in an external memory, and the processor 110 can run the software codes/modules through the external memory interface 120 to execute the flow of the fan control method. The purpose of controlling the speed of the fan.

It should be understood that one or more temperature thresholds mentioned below may be stored in the aforementioned internal memory 120 or external memory.

The mobile phone 100 can implement audio functions, such as music playback, recording, etc., through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor.

The fingerprint sensor 180A is used to collect fingerprints. The mobile phone 100 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locks, fingerprint photographs, fingerprint answering calls, and so on. The touch sensor 180B is also called "touch panel". The touch sensor 180B can be disposed on the display screen 194, and the touch screen is composed of the touch sensor 180B and the display screen 194, which is also called a “touch screen”. The touch sensor 180B is used to detect touch operations acting on or near it. The touch sensor 108B may transmit the detected touch operation to the application processor to determine the type of touch event. The visual output related to the touch operation can be provided through the display screen 194. In other embodiments, the touch sensor 180B may also be disposed on the surface of the mobile phone 100, which is different from the position of the display screen 194.

Of course, the sensor module 180 may also include: a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, an ambient light sensor, a bone conduction sensor, etc. The types of sensors in this embodiment of the application And the type is not limited.

The button 190 includes a power button, a volume button, and so on. The button 190 may be a mechanical button or a touch button. The mobile phone 100 can receive key input, and generate key signal input related to user settings and function control of the mobile phone 100.

The motor 191 can generate vibration prompts. The motor 191 can be used for incoming call vibration notification, and can also be used for touch vibration feedback. For example, touch operations applied to different applications (such as photographing, audio playback, etc.) can correspond to different vibration feedback effects.

The indicator 192 may be an indicator light, which may be used to indicate the charging status, power change, or to indicate messages, missed calls, notifications, and so on.

The SIM card interface 195 is used to connect to the SIM card. The SIM card can be connected to and separated from the mobile phone 100 by inserting into the SIM card interface 195 or pulling out from the SIM card interface 195.

The thermistor 196 is used to detect the temperature of peripheral components of the processor 110, and the peripheral components may be the temperature of the circuit board where the processor 110 is located, or components physically located around the processor 110. When the temperature of the processor 110 increases, the processor 110 will transfer heat to its peripheral components due to heat transfer, so the temperature of the peripheral components will also increase, and the thermistor 196 can detect that the temperature of the peripheral components increases. Because the heat transfer process requires a certain amount of time, the temperature detected by the thermistor 196 changes relatively smoothly with respect to the temperature of the processor 110. As an example, when the thermistor 196 and the processor 110 are provided on the same printed circuit board, the thermistor 196 can detect the temperature of the printed circuit board. Because when the temperature of the processor 110 increases, the temperature of the printed circuit board and other components will also increase due to heat transfer, so the thermistor 196 can detect that the temperature of the printed circuit board increases. Because the heat transfer process requires a certain amount of time, the temperature detected by the thermistor 196 changes more steadily with respect to the temperature of the processor 110, that is, the temperature detected by the thermistor 196 has a low possibility of instantaneous sudden change, which can be realized When the rotation speed of the fan 197 is controlled according to the stable temperature detected by the thermistor 196, the sudden increase or decrease of the rotation speed of the fan 197 can be avoided, and the problem of sudden noise in the electronic device or poor heat dissipation effect on the internal components of the electronic device can be avoided. The thermistor 196 may be a negative temperature coefficient thermistor (NTC), a positive temperature coefficient thermistor (PTC), or other thermistor, which is not limited in the embodiment of the application. .

The fan 197 is used to cool the internal hardware components of the electronic equipment such as the processor 110, the sensor module 180, the motor 1921, the charging management module 140, and the thermistor 196. When the fan 197 rotates at a high speed, the cooling speed of each hardware component is relatively high. Fast. When the rotation speed of the fan 197 is low, the cooling speed of each hardware component is slow. The processor 110 may control the rotation speed of the fan 197, so that the fan 197 cools the hardware components inside the electronic device. In the following, taking the processor 110 integrating the CPU and EC as an example, the process of controlling the rotation speed of the fan 197 in the mobile phone 100 in the embodiment of the present application is introduced.

Exemplarily, the EC may compare the current power consumption parameter value of the CPU with a preset power consumption threshold. If it is determined that the current power consumption parameter of the CPU is lower than the power consumption threshold, the EC obtains the CPU configuration from the external memory/internal memory 121. The temperature of the thermistor 196 is moderated, and then the rotation speed of the fan 197 is controlled according to the junction temperature of the CPU and the temperature of the thermistor 196. For example, when the temperature of the thermistor 196 is greater than the threshold 1, the speed of the fan 197 is controlled to increase; when the temperature of the thermistor 196 is less than the threshold 1, it is determined whether the CPU junction temperature is less than the threshold 2, and if so, the speed of the fan 197 is controlled to remain unchanged If not, control the fan 197 to reduce the speed. If the current power consumption parameter value of the CPU is higher than the power consumption threshold, the EC controls the rotation speed of the fan 197 to increase/decrease according to the temperature of the thermistor 196. For example, when the temperature of the thermistor 196 is greater than the threshold 3, the fan 197 is controlled to increase the speed, and if the temperature of the thermistor 196 is less than the threshold 4, the fan 197 is controlled to decrease the speed.

It can be understood that the components shown in FIG. 1 do not constitute a specific limitation on the structure of the mobile phone 100. The mobile phone 100 may also include more or less components than shown, or combine some components, or split some components. , Or different component arrangements.

In the following, with reference to the architecture of the mobile phone 100 shown in FIG. 1 as an application scenario of the embodiment of the present application, an embodiment in which an electronic device controls the speed of a fan is introduced.

The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also This includes expressions such as "one or more" unless the context clearly indicates to the contrary. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two, or more than two; "and/or" describes the association relationship of associated objects, indicating that three relationships may exist; for example, A and/or B can mean: A alone exists, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. It should also be understood that in the embodiments of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order. .

References described in this specification to "one embodiment" or "some embodiments", etc. mean that one or more embodiments of the present application include a specific feature, structure, or characteristic described in combination with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless it is specifically emphasized otherwise. The terms "including", "including", "having" and their variations all mean "including but not limited to" unless otherwise specifically emphasized.

As shown in Figure 2, it is a detailed structural diagram of the heat dissipation system 20 in the embodiment of this application. It is assumed that the CPU 22 is the processor 110 in Figure 1 above, and the CPU 22 can be provided with or connected to an EC 21, a thermistor (here Taking NTC as an example, of course, other types of thermistors 23 and fans 24 can also be used. It should be noted that EC21 can be integrated inside CPU22, that is, EC21 and CPU22 can be regarded as the same physical component. Of course, EC21 and CPU22 can also be two independent components. The embodiments of this application are not limited. In the following, EC21 and CPU22 are Take two independent components as an example. Wherein, the CPU 22 and the thermistor 23 can be arranged close to each other, such as on the same printed circuit board (not shown in FIG. 2) in the electronic device, or of course, can also be mounted on different printed circuit boards. The embodiment of the present application Not limited. In the following, the CPU 22 and the thermistor 23 can be arranged on the same printed circuit board as an example for description.

It should be noted that the components in Figure 2 can also be replaced with other components. For example, EC 21 can also be replaced with NPU, or other microprocessors, coprocessors, etc., and CPU 22 can also be replaced with application processors or other processors. , The embodiment of this application is not limited.

At present, the mobile phone 100 determines the speed of the fan according to the junction temperature of the CPU. When the junction temperature of the CPU is higher, the speed of the control fan 24 is faster, and when the junction temperature of the CPU is lower, the speed of the control fan is reduced. However, because the junction temperature of the CPU will suddenly change suddenly, for example, when the mobile phone 100 starts a high power consumption application (such as a game application), the CPU needs to run the software code of the application, so the junction temperature of the CPU may increase instantly, so the fan The rotation speed will increase correspondingly instantaneously. When the mobile phone 100 exits a high-power consumption application, the CPU stops running the software code of the application, so the junction temperature of the CPU may be instantaneously reduced, so the speed of the fan will also be instantaneously reduced accordingly. Therefore, currently, when the mobile phone 100 controls the rotation speed of the fan 24, the rotation speed of the fan 24 often increases rapidly or decreases rapidly. On the one hand, the rotation process of the fan will generate noise, so an instantaneous increase in the speed of the fan 24 will cause a sudden increase in noise, which will affect the user experience. On the other hand, when the mobile phone 100 exits a high-power application, although the junction temperature of the CPU drops instantaneously, the temperature of other components in the mobile phone 100 has not yet dropped temporarily or dropped slowly (because the CPU is running high-power applications in the process , Will generate a lot of heat, and this heat will be transferred to other components. Although the CPU exits high-power applications, the junction temperature of the CPU drops rapidly, but the temperature of other components such as the housing cannot be reduced immediately), so if you immediately reduce the speed of the fan 24 Otherwise, it will not be able to quickly reduce the temperature of other parts.

In some embodiments of the present application, the process of controlling the speed of the fan 24 by the mobile phone 100 shown in FIG. 2 may be: the CPU 22 and the NTC 23 are arranged close to each other, such as being arranged on the same printed circuit board. In this case, NTC 23 can detect the temperature of the printed circuit board. That is, when the junction temperature of the CPU 22 increases/decreases, the temperature of the printed circuit board where the CPU is located will also increase/decrease accordingly, and the NTC 23 will detect the increase/decrease in the temperature of the printed circuit board where the CPU 22 is located. Although the junction temperature of CPU 22 increases/decreases rapidly, it takes a while for heat to transfer from the internal heat of CPU 22 to the printed circuit board on which it is located. Therefore, the temperature of the printed circuit board will not increase/decrease rapidly, so the temperature detected by NTC 23 It will not increase/decrease instantaneously and is relatively stable. Therefore, the EC 21 can control the speed of the fan 24 according to the temperature detected by the NTC 23. On the one hand, it can prevent the EC 21 from instantly controlling the fan 24 to reduce the speed, causing the peripheral hardware inside the mobile phone 100 to have no time to cool down except the CPU 22. , The speed of the fan 24 is reduced, which is not conducive to the heat dissipation of other peripheral hardware. On the other hand, it can prevent the EC21 from controlling the fan 24 to increase the rotation speed instantly, causing the problem of sudden increase in noise.

In some other embodiments of the present application, the process of controlling the speed of the fan 24 by the mobile phone 100 shown in FIG. 2 may also be: the EC 21 can obtain the power consumption parameters of the CPU 22, and set the current power consumption parameter values of the CPU 22 with preset values. The power consumption thresholds are compared, and the load scenario of the mobile phone 100 is determined according to the comparison result, and then a corresponding fan control strategy is adopted according to the load scenario. Among them, the power consumption threshold can be user-defined and stored in the internal memory 121 of the mobile phone 100, or it can be set by the device manufacturer and stored in the internal memory 121 when the mobile phone 100 leaves the factory. The embodiment is not limited. For example, when the EC 21 determines that the power consumption parameter value of the CPU 22 is higher than the power consumption threshold stored in the internal memory 121, the EC 21 can determine that the mobile phone 100 is in a high power consumption state, and the EC 21 uses the first strategy to control the fan 24的rpm。 When the EC 21 determines that the current power consumption parameter value of the CPU 22 is lower than the power consumption threshold stored in the internal memory 121, it can be determined that the mobile phone 100 is in a low power consumption state, and the EC 21 can use the second strategy to control the speed of the fan 24. The specific control process of the first strategy and the second strategy will be described in detail below.

Examples of high power consumption states:

When the mobile phone 100 is in a high power consumption state (for example, the CPU 22 starts a certain high power consumption application, or the volume of the speaker 170A is increased, or the brightness of the display 194 is increased, etc.), the first strategy is used to control the fan 24 Rotating speed. The first strategy includes: EC 21 controls the speed of fan 24 according to the temperature of NTC 23. For example, when the temperature of the NTC 23 increases to a first threshold, the EC 21 controls the fan 24 to increase the rotation speed. Since the temperature change of the NTC 23 is more stable than the temperature change of the CPU 22, it can be avoided that when the junction temperature of the CPU 22 increases instantaneously, the speed of the fan 24 increases instantaneously, which may cause the noise to increase suddenly.

When the mobile phone 100 is in a high power consumption state, the temperature of the whole machine is relatively high. When the power consumption of the subsequent mobile phone is gradually reduced as the mobile phone is used, the speed of the fan 24 can also be delayed to reduce the temperature of other components as soon as possible. Therefore, when the EC 21 detects that the temperature of the NTC 23 is lower than the second threshold, the EC 21 controls the fan 24 to reduce the rotation speed. Since the temperature change of NTC 23 is more stable than that of CPU 22, when the junction temperature of CPU 22 decreases instantaneously, the speed of fan 24 will not decrease instantaneously, that is, fan 24 will rotate at a high speed for a while, which can reach The purpose of reducing the temperature of other hardware components in the mobile phone 100 except the CPU 22, such as reducing the temperature of the housing.

It should be noted that the above-mentioned first threshold may be greater than the second threshold. For the value range of the first threshold and the second threshold, the embodiment of the present application may be predetermined according to some empirical values and stored in the internal memory 121 of the mobile phone 100. in.

To sum up, in the high power consumption state, the mobile phone 100 controls the speed of the fan 24 according to the temperature of the NTC 23. On the one hand, it can prevent the EC 21 from instantly controlling the fan 24 to reduce the speed, resulting in other things inside the mobile phone 100 except the CPU 22. Before the peripheral hardware has time to cool down, the speed of the fan 24 is reduced, which is not conducive to the heat dissipation of other peripheral hardware. On the other hand, it can prevent the EC21 from controlling the fan 24 to increase the rotation speed instantly, causing the problem of sudden increase in noise.

Examples of low-power states:

The mobile phone 100 is in a low power consumption state (for example, the CPU 22 exits a high power consumption application, the volume of the speaker 170A is lowered, the brightness of the display 194 is lowered, etc.), and the second strategy is adopted to control the fan speed. Several possible scenarios of the second strategy are described below.

Case 1: When the mobile phone 100 is in a low power consumption state, the second strategy may include: the EC 21 controls the rotation speed of the fan 24 according to the temperature of the NTC 23. When the temperature of the NTC 23 increases to the third threshold, the EC 21 controls the fan 24 to increase the speed. Since the temperature change of the NTC 23 is more stable than the temperature change of the CPU 22, it can be avoided that when the junction temperature of the CPU 22 increases instantaneously, the speed of the fan 24 increases instantaneously, which may cause the noise to increase suddenly.

Case 2: When the mobile phone 100 is in a low power consumption state, the second strategy may also include: the EC21 controls the rotation speed of the fan 24 according to the temperature of the NTC 23 and the temperature of the CPU 22. Exemplarily, the mobile phone 100 stores two thresholds, threshold 1 and threshold 2, where threshold 1 is greater than threshold 2. The EC21 monitors the temperature of the NTC 23 and the temperature of the CPU 22. If the temperature of the NTC 23 is greater than the threshold 1, the EC 21 controls the fan 24 to increase the speed according to the temperature of the NTC 23. Since the temperature change of the NTC 23 is more stable than the change of the junction temperature of the CPU 22, it is possible to avoid the phenomenon that when the junction temperature of the CPU 22 increases instantaneously, the speed of the fan 24 increases instantaneously, thereby causing a sudden increase in noise. Assuming that the temperature of the NTC23 is not greater than the threshold value 1, and the temperature of the CPU22 is less than the threshold value 2, the EC21 controls the fan 24 to decrease its speed instantaneously according to the junction temperature of the CPU22. Since the mobile phone 100 is in a low power consumption state, the heat of the whole machine is relatively low, so the speed of the fan 24 does not need to be large. In order to save resources (such as saving power), the EC21 can be based on the junction temperature of the CPU 22 in the low power consumption state. The rotation speed of the control fan 24 is instantly reduced to save resources.

Taking the above case 2 as an example, the specific implementation process of controlling the fan speed of the mobile phone 100 is described below in conjunction with FIG. 3 and FIG. 2. The process steps shown in FIG. 3 can be described from the perspective of the EC21 in the mobile phone 100 shown in FIG. 2, and the process includes the following:

S301, EC 21 obtains the power consumption parameter value of the CPU 22.

As an example, EC21 may send a first instruction to CPU22, where the first instruction is used to instruct CPU22 to send the value of the power consumption parameter of CPU22 to EC21; when CPU22 receives the first instruction, it sends its current power consumption parameter value to EC21. For example, the EC21 may periodically send the first instruction to the CPU 22. More specifically, the EC21 may send the first instruction to the CPU 22 every 2 minutes, which is not limited in this embodiment of the application.

As another example, the CPU 22 may also actively send its current power consumption parameter value to the EC21. For example, the CPU 22 actively sends the power consumption parameter value to the EC 21 periodically. More specifically, the CPU 22 may send the power consumption parameter value to the EC 21 every 5 minutes, which is not limited in the embodiment of the present application.

As another example, the CPU 22 may also cache its own power consumption parameter value in the internal memory 121 in real time. The EC21 then obtains the power consumption parameter value of the CPU 22 from the internal memory 121.

In S302, the EC21 determines whether the power consumption of the CPU 22 is high power consumption or low power consumption according to the power consumption parameter value of the CPU 22, if it is low power consumption, execute S303, if it is high power consumption, execute S308.

Exemplarily, the EC21 may determine whether the power consumption of the CPU 22 is high power consumption or low power consumption by comparing the power consumption parameter value of the CPU 22 with a preset power consumption threshold. The specific value of the power consumption threshold may be determined in advance according to the empirical value and stored in the internal memory 121, which is not limited in the embodiment of the present application. When the power consumption parameter value of the CPU 22 is lower than the power consumption threshold, the EC21 can determine that the CPU 22 is in a low power consumption state, and when the power consumption parameter value of the CPU 22 is equal to or higher than the power consumption threshold, the EC21 can determine that the CPU is in a high power consumption state. In the low power consumption state, the EC21 can execute the above-mentioned second strategy process; in the high power consumption state, the EC21 can execute the above-mentioned first strategy process.

S303, EC21 obtains the junction temperature of CPU22 and the temperature of NTC23.

As an example, EC21 may send a second instruction to CPU22 and a third instruction to NTC23 after determining that the power consumption of CPU22 is low power consumption; wherein, the second instruction is used to instruct CPU22 to send the junction temperature of CPU22 to EC21, The third command is used to instruct NTC23 to send the temperature of NTC23 to EC21. When CPU22 receives the second instruction, it sends the junction temperature of CPU22 to EC21. When NTC23 receives the third command, it sends the temperature of NTC23 to EC21. Among them, EC21 can periodically send a second command to CPU22 and a third command to NTC23. For example, EC21 sends a second command to CPU22 every 2 minutes, or sends a third command to NTC23 every 2 minutes. This application implements The examples are not limited.

As another example, the CPU 22 can cache its own junction temperature in the internal memory 121 of the mobile phone 100 in real time, and the NTC 23 can cache its own temperature in the internal memory 121 in real time. When EC21 determines that the power consumption of CPU22 is low power consumption, EC21 can read the current junction temperature of CPU22 and the current temperature of NTC23 from internal memory 121.

S304, EC21 determines whether the temperature of NTC23 is higher than the third threshold, if yes, execute S305, if not, execute S306.

Exemplarily, the third threshold may be customized by the user, or it may be set by the mobile phone 100 at the factory. For example, it may be the maximum temperature that the printed circuit board can withstand during normal operation. The example does not limit this.

S305 and EC21 control the speed of the fan to increase.

Exemplarily, the EC21 may send a fourth instruction to the fan to control the speed of the fan to increase. The speed to which the EC21 controls the fan 24 to increase can be set by those skilled in the art according to actual needs, which is not limited in the embodiment of the present application.

In the embodiment of this application, when the power consumption of the CPU 22 is low power consumption, if the temperature of the NTC 23 is higher, the EC21 controls the speed of the fan 24 to increase, because the temperature change of the NTC 23 is more stable than the change of the junction temperature of the CPU 22 Therefore, it can be avoided that due to the transient overclocking of the CPU 22 and the instantaneous increase of the junction temperature of the CPU 22, the rotation speed of the fan 24 suddenly increases, and the noise of the fan 24 suddenly increases. For example, when the CPU 22 is overclocked transiently, the junction temperature of the CPU 22 will increase instantaneously. If the EC21 controls the speed of the fan 24 to increase according to the junction temperature of the CPU 22, the speed of the fan 24 will suddenly increase, resulting in noise of the fan 24 Suddenly increase, which brings a bad experience to users. In the solution of the present application, when the power consumption is low, the mobile phone 100 generates relatively little heat, and the overall temperature is not too high. Therefore, the EC21 can control the speed of the fan 24 to increase according to the temperature of the NTC23, so that the EC21 will not be controlled instantly The increase of the rotation speed of the fan 24 prevents the sudden increase of the rotation speed of the fan 24, which causes the noise of the fan 24 to suddenly increase.

In S306, the EC21 determines whether the junction temperature of the CPU 22 is lower than the fourth threshold, if yes, execute S307, and if not, control the rotation speed of the fan to remain unchanged.

Exemplarily, the fourth threshold may be set in the same or similar manner as the third threshold, which is not limited in the embodiment of the present application. Wherein, the fourth threshold and the third threshold may be different, for example, the fourth threshold is lower than the third threshold.

Exemplarily, if the EC21 determines that the junction temperature of the CPU 22 is higher than the fourth threshold, the rotation speed of the fan 24 is controlled to remain unchanged.

It should be noted that the embodiment of the present application does not limit the execution sequence of S304 and S306. For example, the EC may perform S304 first and then S306, or the EC may perform S306 first and then S304.

In S307, the EC21 controls the rotation speed of the fan 24 to decrease.

Exemplarily, the EC21 may send a fifth instruction to the fan to control the rotation speed of the fan to decrease. The speed of the fan 24 controlled by the EC21 can be set by those skilled in the art according to actual needs, which is not limited in the embodiment of the present application.

In the embodiment of the present application, when the power consumption of the CPU 22 is low power consumption, the EC 21 can control the speed reduction of the fan according to the junction temperature of the CPU 22, so that the noise of the fan 24 can be quickly reduced, which helps to improve the user experience. For example, in the low power consumption mode, the electronic device generates relatively little heat. If the EC21 controls the rotation speed of the fan 24 to decrease according to the temperature of the NTC23, since the temperature of the NTC23 decreases slowly, the fan 24 will still rotate rapidly for a period of time, so the noise of the fan 24 cannot be reduced quickly. In the embodiment of the present application, in the low power consumption state, EC21 can control the fan speed to decrease according to the junction temperature of CPU22. Since the junction temperature of CPU22 drops faster relative to the temperature of NTC23, CE21 can control the speed of fan 24 faster The reduction.

S308, EC21 obtains the temperature of NTC23.

As an example, the EC21 may send a sixth instruction to the NTC23 after determining that the power consumption of the CPU22 is high power consumption; wherein the sixth instruction is used to instruct the NTC23 to send the temperature of the NTC23 to the EC21. When NTC23 receives the sixth command, it sends the temperature of NTC23 to EC21. The EC21 may periodically send the sixth command to the NTC23. For example, the EC21 sends the sixth command to the NTC23 every 2 minutes, which is not limited in the embodiment of the present application.

As another example, the CPU 22 can cache its own junction temperature in the internal memory 121 in real time, and the NTC 23 can cache its own temperature in the internal memory 121 in real time. When EC21 determines that the power consumption of CPU22 is high power consumption, EC21 can read the current temperature of NTC23 from internal memory 121.

In S309, the EC21 determines whether the temperature of the NTC23 is higher than the first threshold, if yes, execute S310, if not, execute S311.

Exemplarily, the first threshold may be set in the same or similar manner as the third threshold, which is not limited in the embodiment of the present application. Wherein, the first threshold and the third threshold may be different, for example, the first threshold is higher than the third threshold.

S310 and EC21 control the speed of the fan 24 to increase.

Exemplarily, the EC21 may send a seventh command to the fan 24 to control the speed of the fan to increase.

In the embodiment of the present application, when the mobile phone 100 is in a high power consumption state, the EC21 may control the increase of the fan speed according to the temperature of the NTC23. Since the temperature change of the NTC 23 is more stable than the junction temperature of the CPU 22, the sudden increase in the speed of the fan 24 caused by the instantaneous increase of the junction temperature of the CPU 22 can be avoided, and the noise of the fan 24 will suddenly increase.

S311, EC21 determine whether the temperature of NTC23 is lower than the second threshold, if yes, execute S312, if not, control the fan speed to remain unchanged.

Exemplarily, the second threshold may be set in the same or similar manner as the third threshold, which is not limited in the embodiment of the present application. Wherein, the second threshold and the fourth threshold are unequal temperature values, and the second threshold is higher than the fourth threshold and lower than the third threshold.

Exemplarily, if the EC21 determines that the temperature of the NTC23 is higher than the second threshold, the EC21 controls the rotation speed of the fan 24 to remain unchanged.

It should be noted that the embodiment of the present application does not limit the execution sequence of S309 and S311. For example, EC21 may perform S309 first and then S311, or EC21 may perform S311 first and then S309.

S312 and EC21 control the speed of the fan 24 to decrease.

Exemplarily, the EC 21 may send an eighth instruction to the fan 24 for controlling the rotation speed of the fan 24 to decrease.

In the embodiment of the present application, when the mobile phone 100 is in a high power consumption state, the temperature of the whole machine is relatively high, and the EC21 can control the rotation speed of the fan to decrease according to the temperature of the NTC23. Since the temperature change of the NTC23 is more stable than the junction temperature of the CPU22, it can avoid the instantaneous decrease of the junction temperature of the CPU22, immediately reducing the speed of the fan 24, but delaying the reduction of the speed of the fan 24, which can quickly reduce the temperature of other components. For example, in a high power consumption state, the temperature of the entire mobile phone 100 is relatively high, for example, the temperature of the casing is relatively high. If the EC21 uses the junction temperature of the CPU 22 to control the speed of the fan 24, since the junction temperature of the CPU 22 drops instantaneously, the EC21 will control the speed of the fan 24 to decrease rapidly, so the whole phone 100 cannot cool down quickly. In the solution of the present application, in the high power consumption state, EC21 controls the fan speed reduction according to the temperature of NTC23. Since the temperature of NTC23 decreases slowly relative to the junction temperature of the CPU, the speed of the fan 24 can be reduced by a delay, which can be fast Lowering the temperature of the entire mobile phone 100 will help improve user experience.

In other embodiments, the mobile phone 100 does not need to consider whether the low power consumption state or the high power consumption state, that is, the same strategy is used to control the fan speed in the low power consumption state or the high power consumption state. The same strategy may be the aforementioned first strategy or the aforementioned second strategy. For example, the mobile phone 100 adopts the second strategy to control the fan speed regardless of whether it is in a low power state or a high power state; for another example, the mobile phone 100 adopts the first strategy whether in a low power state or a high power state. Control the speed of the fan.

In the following, in conjunction with FIG. 4 and FIG. 2, other implementation processes of controlling the fan speed of the mobile phone 100 are introduced. The process steps shown in FIG. 4 can be described from the perspective of the EC21 in the mobile phone 100 shown in FIG. 2, and the process includes the following:

S401, EC21 obtains the temperature of NTC23.

Exemplarily, the process of EC21 obtaining the temperature of NTC23, please refer to the embodiment shown in FIG. 3, the process of EC21 obtaining NTC23, which will not be repeated here.

In S402, the EC21 determines whether the NTC23 is greater than the first threshold, if yes, execute S403, if not, execute S404.

In S403, the EC21 controls the rotation speed of the fan 24 to increase.

S404. The EC21 obtains the power consumption parameter value of the CPU 22.

In S405, the EC21 determines whether the power consumption of the CPU 22 is high power consumption or low power consumption according to the power consumption parameter value of the CPU 22; if it is high power consumption, execute S406, and if it is low power consumption, execute S409.

In S406, the EC21 determines whether the temperature of the NTC23 is lower than the second threshold, if yes, execute S407, if not, execute S408.

In S407, the EC21 controls the rotation speed of the fan 24 to decrease.

S408 and EC21 control the speed of the fan 24 to remain unchanged.

In S409, the EC21 determines whether the junction temperature of the CPU 22 is lower than the third threshold, if yes, execute S410, if not, execute S411.

In S401, the EC21 controls the rotation speed of the fan 24 to decrease.

S411 and EC21 control the rotation speed of the fan 24 unchanged.

In this embodiment, EC21 detects the temperature of NTC23. If the temperature of NTC23 is greater than the first threshold, the speed of fan 24 is increased, which can avoid transient overclocking of CPU22 and the instantaneous increase of the junction temperature of CPU22, causing the fan to speed up suddenly, which may lead to The noise of the fan 24 suddenly increases. If the temperature of the NTC 23 is less than the first threshold, it is determined whether the current power consumption of the CPU 22 is low power consumption or high power consumption, and different strategies are used for low power consumption and high power consumption. Exemplarily, when the power consumption of the CPU 22 is low power consumption, due to the low power consumption, the overall heat of the mobile phone 100 is relatively small, so the mobile phone 100 focuses on the influence of noise, so the EC21 controls the fan according to the junction temperature of the CPU 22 The speed of the fan 24 is reduced. Since the junction temperature of the CPU 22 can be reduced instantaneously, the speed of the fan 24 can be reduced immediately, and the noise of the fan 24 can be reduced immediately. When the power consumption of CPU22 is high power consumption, EC21 can control the speed of fan 24 to decrease according to the temperature of NTC23. Due to high power consumption, the temperature of the whole phone 100 is higher, and the delay of fan 24 can be controlled according to the temperature of NTC23. Reducing the rotation speed can lower the temperature of the entire mobile phone 100 and improve the user experience.

In the above embodiment, the thermistor is provided in the electronic device as an example. Another embodiment is described below. In this embodiment, the electronic device does not need to be provided with the thermistor, and the technical solution provided in the embodiment of the present application can also be implemented. Taking the electronic device as the mobile phone 100 as an example, the structure of the electronic device is described below.

Refer to FIG. 5, which is a schematic structural diagram of the mobile phone 100. As shown in FIG. 5, the mobile phone 100 includes an EC 51, a CPU 52, and a fan 53. It should be noted that the components in Figure 5 can also be replaced with other components, such as EC 51 can also be replaced with NPU, or other microprocessors, coprocessors, etc., CPU 52 can also be replaced with application processors or other processors , The embodiment of this application is not limited.

The EC 51 can filter the obtained junction temperature of the CPU 52, and then control the rotation speed of the fan 53 according to the filtered temperature. Since EC 51 can filter the junction temperature of CPU 52, EC 51 can filter out the abnormal junction temperature of CPU 52 during the rapid increase/decrease of the junction temperature of CPU 52, and adjust the fan 53's temperature according to the filtered temperature. The rotation speed can prevent the rotation speed of the fan 53 from rapidly increasing/decreasing.

The following describes the process of controlling the fan of the mobile phone 100 shown in FIG. 5:

The first step, EC51 obtains the junction temperature of CPU52. In this embodiment, the manner in which the EC21 obtains the junction temperature of the CPU52 may be the same or similar to the manner in which the EC21 obtains the junction temperature of the CPU52 in the above example, and will not be repeated here.

In the second step, the EC51 filters the junction temperature of the CPU52, and controls the speed of the fan 53 according to the filtered temperature.

As an example, the EC51 can filter the abnormal temperature values in the junction temperature of the CPU 52 within a period of time, and then take the average temperature during this period of time.

For example, suppose that EC51 obtains the junction temperature of CPU52 for each second in a 5-second period: 20°C in the first second, 25°C in the second second, 90°C in the third second, 30°C in the fourth second, and 5th second 33°C. Assuming that the abnormal temperature difference range is 40℃ to 100℃, EC51 can filter out 90 degrees in the third second, and then calculate the average value after removing the temperature value in the third second, that is, the average value in these 5 seconds = (20 ℃+25℃+30℃+30℃)/4=27℃. The EC51 controls the rotation speed of the fan 53 according to 27°C to adjust the rotation speed corresponding to 27°C. In this example, it can be avoided that when the abnormal value of the junction temperature of the CPU52 suddenly increases, the EC51 will suddenly increase the speed of the fan 53. Similarly, it can also avoid the sudden decrease of the abnormal value of the junction temperature of the CPU52. The phenomenon of sudden decrease in speed.

As another example, EC51 can determine whether the difference between the current temperature value of the junction temperature of CPU52 and the temperature value of the previous second is within the preset temperature difference range. If so, EC51 can determine whether the difference between the current temperature value of CPU52 and the temperature value of the previous second is within the preset temperature difference range. The average temperature of the first two seconds controls the speed of the fan. For example, EC51 obtains that the junction temperature of the CPU in the first second is 20°C, the junction temperature in the second second is 25°C, and the junction temperature in the third second is 90°C, EC51 It is detected that the current temperature value of the junction temperature of the CPU52 (ie, the junction temperature in the third second) and the temperature difference in the second second is 65°C within the preset temperature difference range, and EC51 is based on the temperature in the first second and second second The average value controls the rotation speed of the fan 53. In this example, it can be avoided that when the abnormal value of the junction temperature of the CPU 52 suddenly increases, the phenomenon that the speed of the EC51 control fan 53 suddenly increases.

Of course, in addition to the above two filtering methods, there can also be other filtering methods, such as "first-order lag filtering algorithm", etc., which are not limited in the embodiment of the present application.

It can be seen from the foregoing description that, in the foregoing embodiment, the electronic device does not need to be provided with a thermistor, and the technical solution provided by the embodiment of the present application can also be implemented.

In the above-mentioned embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the electronic device (mobile phone 100) as the execution subject. In order to realize each function in the method provided in the above embodiments of the present application, the terminal device may include a hardware structure and/or software module, and realize the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.

Claims

A method for controlling the speed of a fan, characterized in that it is applied to an electronic device. The electronic device includes a controller, a chip, a fan, and a thermistor. The thermistor is used to detect that the electronic device is located around the chip. The temperature of the component, the method includes:

Obtaining the first temperature detected by the thermistor by the controller;

The controller determines the rotation speed of the fan according to the first temperature;

The controller controls the fan to rotate according to the determined rotation speed.
The method of claim 1, wherein before the controller obtains the first temperature detected by the thermistor, the method further comprises:

The controller determines that the power consumption of the electronic device is greater than a first power consumption threshold.
The method according to claim 1 or 2, wherein the controller determining the rotation speed of the fan according to the first temperature comprises:

If the first temperature is greater than the first temperature threshold, the controller determines that the rotation speed of the fan increases to the first rotation speed;

If the first temperature is less than the second temperature threshold, the controller determines that the rotation speed of the fan is reduced to the second rotation speed;

If the first temperature is greater than or equal to the second temperature threshold and less than or equal to the first temperature threshold, the controller determines that the rotation speed of the fan does not change.
The method of claim 1, wherein the controller determining the rotation speed of the fan according to the first temperature comprises:

If the first temperature is greater than the first temperature threshold, the controller determines that the rotation speed of the fan increases to the first rotation speed;

If the first temperature is less than or equal to the first temperature threshold, the controller determines the rotation speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature, and the second temperature is The internal temperature of the chip.
The method of claim 4, wherein the controller determining the rotation speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature comprises:

When the power consumption of the electronic device is greater than the first power consumption threshold, and the first temperature is less than the second temperature threshold, it is determined that the rotation speed of the fan is reduced to the second rotation speed; the second temperature threshold is less than the second temperature threshold. The first temperature threshold; and/or

When the power consumption of the electronic device is less than the first power consumption threshold and the second temperature is less than the third temperature threshold, it is determined that the rotation speed of the fan is reduced to a third rotation speed, and the third temperature threshold is less than The first temperature threshold.
The method according to any one of claims 1-5, wherein the chip and the thermistor are arranged on the same circuit board in the electronic device, and the thermistor detects the circuit board The temperature realizes the detection of the temperature of the components surrounding the chip.
An electronic device, characterized by comprising: a controller, a chip, a fan, and a thermistor;

The fan is used to dissipate heat from physical devices in the electronic device when rotating, and the physical devices include the chip;

The thermistor is used to detect the temperature of the peripheral components of the chip in the electronic device;

The controller is configured to obtain the first temperature detected by the thermistor, and determine the rotation speed of the fan according to the first temperature; and control the fan to rotate at the determined rotation speed.
The electronic device of claim 7, wherein the controller is further configured to determine that the power consumption of the electronic device is greater than the first temperature before determining the rotation speed of the fan according to the first temperature. Power consumption threshold.
The electronic device according to claim 7 or 8, wherein when the controller is used to determine the speed of the fan according to the first temperature, it is specifically used to:

If the first temperature is greater than the first temperature threshold, determining that the rotation speed of the fan increases to the first rotation speed;

If the first temperature is less than the second temperature threshold, determining that the rotation speed of the fan is reduced to the second rotation speed;

If the first temperature is greater than or equal to the second temperature threshold and less than or equal to the first temperature threshold, it is determined that the rotation speed of the fan does not change.
8. The electronic device according to claim 7, wherein the controller is specifically used for determining the rotation speed of the fan according to the first temperature:

If the first temperature is greater than the first temperature threshold, determining that the rotation speed of the fan increases to the first rotation speed;

If the first temperature is less than or equal to the first temperature threshold, the speed of the fan is determined according to the power consumption of the electronic device, the first temperature, and the second temperature, and the second temperature is the chip's Internal temperature.
The electronic device of claim 10, wherein the controller is specifically configured to determine the speed of the fan according to the power consumption of the electronic device, the first temperature and the second temperature. :

When the power consumption of the electronic device is greater than the first power consumption threshold, and the first temperature is less than the second temperature threshold, it is determined that the rotation speed of the fan is reduced to the second rotation speed; the second temperature threshold is less than the second temperature threshold. The first temperature threshold; and/or

When the power consumption of the electronic device is less than the first power consumption and the second temperature is less than the third temperature threshold, it is determined that the rotation speed of the fan is reduced to a third rotation speed, and the third temperature threshold is less than the third temperature threshold. The first temperature threshold.
The electronic device according to any one of claims 7-11, wherein the chip and the thermistor are arranged on the same circuit board in the electronic device, and the thermistor detects the circuit The temperature of the board realizes the detection of the temperature of the components around the chip.
An electronic device, characterized by comprising at least one processor and memory;

The memory is used to store one or more computer programs;

When one or more computer programs stored in the memory are executed by the at least one processor, the electronic device is enabled to implement the method according to any one of claims 1-6.
A computer storage medium, characterized in that the computer-readable storage medium includes a computer program, and when the computer program runs on an electronic device, the electronic device is caused to execute the method according to any one of claims 1-6.
A program product, characterized in that the program product includes instructions, which when run on a computer, cause the computer to execute the method according to any one of claims 1-6.