Browse Prior Art Database

ACTIVE/PASSIVE HARD DRIVE COOLING ASSEMBLY

IP.com Disclosure Number: IPCOM000033781D
Original Publication Date: 2004-Dec-28
Included in the Prior Art Database: 2004-Dec-28
Document File: 2 page(s) / 96K

Publishing Venue

Motorola

Related People

Wendy Tse: AUTHOR

Abstract

Dual cooling methods, one active, one passive, are employed to maintain the operating temperature of a hard disk unit. This arrangement is particularly applicable to Personal Video Recorders (PVRs)/Digital Video Recorders (DVRs)

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                        ACTIVE/PASSIVE HARD DRIVE COOLING ASSEMBLY

Author:  Wendy Tse

ABSTRACT

Dual cooling methods, one active, one passive, are employed to maintain the operating temperature of a hard disk unit.  This arrangement is particularly applicable to Personal Video Recorders (PVRs)/Digital Video Recorders (DVRs) 

BODY

Compared to other components inside a typical PVR/DVR unit, the hard disk drive has a relatively narrow operating temperature range (typically from 0° to 55°C).  Most PVR/DVR units on the market utilize active cooling methods (such as fans) to maintain this narrow temperature range.  The primary drawbacks to a fan-based cooling system are lack of reliability, limited life, and acoustic noise.  In order to maintain the overall PVR system reliability and operating life, a passive cooling method was utilized by using a pair of "custom-made" heat sinks attached to the hard disk drive as shown in Figure A.

In addition, to further increase the safety margin, a combination of the dual heat sinks and fan can be utilized.  The fan position can be placed either below (as illustrated in Figure B), above, or to either side of the hard drive/heat sink assembly to maximize cooling. As a consequence of the heat sinks, the fan can be operated at slower speed, which results in increased reliability and life, and a reduction in acoustic noise.

DRAWINGS

          


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Copyright Motorola, Inc. 2004