Browse Prior Art Database

Hybrid Air System

IP.com Disclosure Number: IPCOM000070879D
Original Publication Date: 1978-Nov-01
Included in the Prior Art Database: 2005-Jun-30
Document File: 2 page(s) / 78K

Publishing Venue

IBM

Abstract

An air system for a disk file is shown schematically in the figure. The system includes a 95% efficient dioctyl phthalate (DOP) prefilter 10, an inlet plenum 11, a blower 12, and an absolute filter 13 which is connected to the blower 12, and the head disk assembly 14 by plenums 16 and 17. The head disk assembly is sealed to the voice coil motor 15 and a return duct 18 extends from the voice coil motor back to the inlet plenum 11.

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Hybrid Air System

An air system for a disk file is shown schematically in the figure. The system includes a 95% efficient dioctyl phthalate (DOP) prefilter 10, an inlet plenum 11, a blower 12, and an absolute filter 13 which is connected to the blower 12, and the head disk assembly 14 by plenums 16 and 17. The head disk assembly is sealed to the voice coil motor 15 and a return duct 18 extends from the voice coil motor back to the inlet plenum 11.

The system is low cost, provides for long filter life since only a small amount of new makeup air is required, and the prefilter 10 functions to reduce any acoustic noise generated at the eye of the blower 12.

The head disk assembly 14 is provided with air having a contamination level of near zero because of the placement of the absolute filter 13, and the temperature rise of the air caused by the rotating disks is sufficiently small to prevent misregistration between the magnetic heads and data tracks on the disk.

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