APPARATUS AND A METHOD FOR CONTROLLING FANS TO MINIMIZE NOISE GENERATED BY THE FANS

摘要

Purpose: a device and a kind of method are arranged to minimize the sound for resulting from multiple cooling fans, by RPM (revolutions per minute) equality for making cooling fans each other for controlling fan. Construction: A power supply device (12) supplies electric power to each section. A temperature sensor (10) sense temperature in the inside of an electronic device. One adjuster (13) generates a constant voltage. One voltage change unit (24) changes the constant voltage from regulator applications. One fan (14) all by rotational voltage, changes with voltage change unit. One RPM of the measurement parts one RPM (26) measurement fan. One microcomputer (21) changes the RPM of fan according to the sense of heat control regulator by temperature sensor and according to its RPM for measuring part measurement by RPM.