公开(公告)号：US12089365B2

公开(公告)日：2024-09-10

申请号：US17842479

申请日：2022-06-16

Applicant: LANNER ELECTRONICS INC.

Inventor： Yueh-Se Huang ,  Kuo-Liang Shen

IPC: H05K7/20 ,  G06F1/20

CPC classification number: H05K7/20209 ,  G06F1/20 ,  H05K7/20136 ,  G06F2200/201

Abstract: A smart cooling fan system is disclosed, and comprises temperature sensors, a first cooling fan connected to a main processor of an electronic device, a second cooling fan disposed in a housing case of the electronic device, and a microcontroller. The microcontroller is configured to, based on immediate fan rotation speed, find out a first volumetric flow rate and a second volumetric flow rate by looking up a cubic feet per minute (CFM)-RPM lookup table (LUT), a first pulse width modulation (PWM) LUT and a second PWM LUT, the microcontroller controls the first cooling fan to produce a first airflow having the first volumetric flow rate, and also controls the second cooling fan to produce a second airflow having the second volumetric flow rate.

公开(公告)号：US20230070920A1

公开(公告)日：2023-03-09

申请号：US17842479

申请日：2022-06-16

Applicant: LANNER ELECTRONICS INC.

Inventor： Yueh-Se Huang ,  Kuo-Liang Shen

IPC: H05K7/20 ,  G06F1/20

Abstract: A smart cooling fan system is disclosed, and comprises a first temperature sensor, a second temperature sensor, a first cooling fan connected to a main processor of an electronic device, a second cooling fan disposed in a housing case of the electronic device, and a microcontroller. The microcontroller is configured to, based on immediate fan rotation speed, find out a first volumetric flow rate and a second volumetric flow rate by looking up a CFM-RPM lookup table (LUT), a first PWM LUT and a second PWM LUT, the microcontroller controls the first cooling fan to produce a first airflow having the first volumetric flow rate, and also controls the second cooling fan to produce a second airflow having the second volumetric flow rate. As a result, the operating temperature of the main processor and an ambient temperature of the housing case are therefore immediately reduced.