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Noise-Reducing Baffle Arrangement for Machine Cabinet

IP.com Disclosure Number: IPCOM000046940D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Gaunt, DS: AUTHOR [+3]

Abstract

A cabinet for an office machine houses noisy electromechanical components in a lower chamber and stationary electrical components in an upper chamber. Both chambers must be cooled by forced airflow through the cabinet from the surrounding atmosphere. To reduce noise reaching the surroundings of the machine, a louvered outlet grille for the exit air is screened from the interior by a spaced baffle plate. Greater noise reduction is achieved by segregating the airflow from the two chambers to flow around upper and lower portions of the baffle, respectively. As shown in the drawing, the cabinet is divided into upper and lower chambers by a shelf 8 and foam seal 9. The machine cover 10 has an exit grille 11 which is louvered at about 15Œ.

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Noise-Reducing Baffle Arrangement for Machine Cabinet

A cabinet for an office machine houses noisy electromechanical components in a lower chamber and stationary electrical components in an upper chamber. Both chambers must be cooled by forced airflow through the cabinet from the surrounding atmosphere. To reduce noise reaching the surroundings of the machine, a louvered outlet grille for the exit air is screened from the interior by a spaced baffle plate. Greater noise reduction is achieved by segregating the airflow from the two chambers to flow around upper and lower portions of the baffle, respectively. As shown in the drawing, the cabinet is divided into upper and lower chambers by a shelf 8 and foam seal 9. The machine cover 10 has an exit grille 11 which is louvered at about 15OE. A duct 12 completely screens the exit grille and has an opening at top and bottom to permit air to reach the grille. A splitter 13 defines separate airflow channels for air from the upper and lower chambers of the machine. The opposed walls of the air flow channels, formed by the cover 10 and baffle 12 are lined with noise-absorbing material 14, for example, acoustic foam.

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