公开(公告)号：US11558978B2

公开(公告)日：2023-01-17

申请号：US17106219

申请日：2020-11-30

Applicant: WISTRON CORP.

Inventor： Cheng-Pang Wang ,  Chih-Chun Liu ,  Hung Jen Su ,  Wen-Chen Wu

IPC: H05K7/20 ,  G06F1/20 ,  F04D29/66

Abstract: A fan system is used for dissipating heat of an electronic device. The fan system includes a fan, a hollow structure, and a control circuit. Sound waves made by the fan are transmitted to an interior of the hollow structure when the fan is operating. The control circuit is connected to the hollow structure and is configured to control deformation/deformations of the hollow structure according to a state/states of the fan and/or the electronic device, which change a volume of the interior of the hollow structure for making a resonance frequency of the hollow structure being approximate to a rotation speed of the fan or being the same as the rotation speed of the fan.