Fan control method for heat dissipation of an electronic device

Patent metadata

Field	Value
Publication number	US-11903162-B2
Application number	US-202217581161-A
Country	US
Kind code	B2
Filing date	Jan 21, 2022
Priority date	Jan 26, 2021
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

The disclosure provides a fan control method, applied to an electronic device. The electronic device includes a fan and a setting unit, the setting unit having a plurality of setting values, and each setting value being corresponding to a sampling number. The fan control method includes: continuously detecting a temperature of a heat source to obtain a plurality of temperature values; selecting one of the plurality of setting values based on variations of the temperature values; acquiring a value set from the temperature values based on the sampling number corresponding to the selected setting value, and generating an updated temperature value based on the value set; and controlling rotation of the fan based on the updated temperature value.

First claim

What is claimed is:

1. A fan control method, applied to an electronic device, the electronic device comprising a fan and a setting unit, the setting unit having a plurality of setting values, each of the setting values corresponding to a sampling number, the fan control method comprising:
continuously detecting a temperature of a heat source to obtain a plurality of temperature values;
selecting one of the setting values based on variations of the temperature values;
acquiring a value set from the temperature values based on the sampling number corresponding to the selected setting value, and generating an updated temperature value based on the value set; and
controlling rotation of the fan based on the updated temperature value;
wherein the temperature values comprise a current temperature value, and the step of selecting one of the setting values based on the variations of the temperature values comprises:
acquiring a reference value set from the temperature values based on a preset number, and calculating a reference average value of the reference value set;
calculating a difference between the current temperature value and the reference average value; and
selecting one of the setting values based on the difference;

wherein the sampling numbers comprise a first sampling number and a second sampling number, the first sampling number is less than the second sampling number, the setting unit has a temperature difference, and the step of selecting one of the setting values based on the difference comprises:
selecting the setting value corresponding to the first sampling number, when the difference is greater than the temperature difference; and
selecting the setting value corresponding to the second sampling number, when the difference is less than or equal to the temperature difference.

2. The fan control method according to claim 1 , wherein the preset number is one of the sampling numbers.

3. The fan control method according to claim 1 , wherein the temperature values comprise a current temperature value and at least one previous temperature value, and the step of selecting one of the setting values based on the variations of the temperature values comprises:
calculating a difference between the current temperature value and a latest previous temperature value; and
selecting one of the setting values based on the difference.

4. The fan control method according to claim 1 , wherein the step of controlling the rotation of the fan based on the updated temperature value comprises: mapping a target rotation speed value on a fan control graph based on the updated temperature value to control the rotation of the fan.

5. The fan control method according to claim 1 , wherein the updated temperature value is an average value of the value set.

6. A fan control method, applied to an electronic device, the electronic device comprising a fan and a setting unit, the setting unit having a plurality of setting values, each of the setting values corresponding to a sampling number, the fan control method comprising:
continuously detecting a temperature of a heat source to obtain a plurality of temperature values;
selecting one of the setting values based on variations of the temperature values;
acquiring a value set from the temperature values based on the sampling number corresponding to the selected setting value, and generating an updated temperature value based on the value set; and
controlling rotation of the fan based on the updated temperature value;
wherein the temperature values comprise a current temperature value, and the step of selecting one of the setting values based on the variations of the temperature values comprises:
acquiring a reference value set from the temperature values based on a preset number, and calculating a reference average value of the reference value set;
calculating a difference between the current temperature value and the reference average value; and
selecting one of the setting values based on the difference;

wherein the sampling numbers comprise a first sampling number, a second sampling number, and a third sampling number, the first sampling number is less than the second sampling number, the second sampling number is less than the third sampling number, the setting unit has a first temperature difference and a second temperature difference, the first temperature difference is greater than the second temperature difference, and the step of selecting one of the setting values based on the difference comprises:
selecting the setting value corresponding to the first sampling number, when the difference is greater than the first temperature difference;
selecting the setting value corresponding to the second sampling number, when the difference is less than or equal to the first temperature difference and is greater than the second temperature difference; and
selecting the setting value corresponding to the third sampling number, when the difference is less than or equal to the second temperature difference.

7. A fan control method, applied to an electronic device, the electronic device comprising a fan and a setting unit, the setting unit having a plurality of setting values, each of the setting values corresponding to a sampling number, the fan control method comprising:
continuously detecting a temperature of a heat source to obtain a plurality of temperature values;
selecting one of the setting values based on variations of the temperature values;
acquiring a value set from the temperature values based on the sampling number corresponding to the selected setting value, and generating an updated temperature value based on the value set; and
controlling rotation of the fan based on the updated temperature value;
wherein the temperature values comprise a current temperature value, and the step of selecting one of the setting values based on the variations of the temperature values comprises:
acquiring a reference value set from the temperature values based on a preset number, and calculating a reference average value of the reference value set;
calculating a difference between the current temperature value and the reference average value; and
selecting one of the setting values based on the difference;

wherein the sampling numbers comprise a first sampling number, a second sampling number, and a third sampling number, the first sampling number is less than the second sampling number, the second sampling number is less than the third sampling number and corresponds to a preset equation, the setting unit has a first temperature difference and a second temperature difference, the first temperature difference is greater than the second temperature difference; and the step of selecting one of the setting values based on the difference comprises:
selecting the setting value corresponding to the first sampling number, when the difference is greater than the first temperature difference;
selecting the setting value corresponding to the second sampling number, when the difference is less than or equal to the first temperature difference and is greater than the second temperature difference; and
selecting the setting value corresponding to the third sampling number, when the difference is less than or equal to the second temperature difference.

8. The fan control method according to claim 7 , wherein the preset equation comprises a linear equation.

Assignees

• Asustek Comp Inc

Inventors

• Lin Hsin-Chen
• Chiou Ing-Jer

Classifications

• H05K7/20209 Primary

  Thermal management, e.g. fan control · CPC title

• G05B15/02

  electric · CPC title

• G06F1/206

  comprising thermal management · CPC title