公开(公告)号：US12180978B2

公开(公告)日：2024-12-31

申请号：US18058738

申请日：2022-11-24

Applicant: ASIA VITAL COMPONENTS CO., LTD.

Inventor： Hua Lai ,  Ze-Hua Tan

IPC: F04D29/52 ,  F04D19/00 ,  F04D29/66

Abstract: A fan frame with noise muffling structure includes a frame having a top and a bottom and defining a centered air flow passage that extends from the top to the bottom. The air flow passage has an air inlet and an air outlet formed on the top and the bottom, respectively. The frame further has a noise muffling zone in at least one area of the frame located between the air flow passage and an outer periphery of the frame. In the noise muffling zone, there is provided at least one noise muffling unit, which is located between the top and the bottom without communicating with the air flow passage. The noise muffling unit internally defines a hollow cavity, which is closed between but not extended through the top and the bottom. The hollow cavity isolates air flow noise and absorbs frame vibration and noise produced by the frame vibration.