公开(公告)号：US20230307009A1

公开(公告)日：2023-09-28

申请号：US18327377

申请日：2023-06-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Rong Li ,  Liangyun Wang ,  Min Wei ,  Guanglin Lin

IPC: G11B33/12 ,  G11B33/08 ,  G11B33/14

CPC classification number: G11B33/126 ,  G11B33/08 ,  G11B33/142

Abstract: A hard drive backplane has a plurality of ventilation holes, and the expansion cavity muffler is mounted in the ventilation holes of the hard drive backplane. The expansion cavity muffler includes at least one expansion cavity and at least one connecting pipe in communication in a first direction. The connecting pipe at one end of the expansion cavity muffler facing toward the hard drive backplane is fixedly mounted in the ventilation hole such that the expansion cavity muffler is in communication with the ventilation hole. An area of a cross-section that is of each expansion cavity and that is perpendicular to the first direction is larger than an area of a cross-section that is of the connecting pipe adjacent to the expansion cavity and that is perpendicular to the first direction. The first direction is perpendicular to a surface of the hard drive backplane.