Browse Prior Art Database

Gate/Shutter Airflow Control Device

IP.com Disclosure Number: IPCOM000035815D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Golledge, I: AUTHOR [+3]

Abstract

This article describes a method whereby the airflow from a common cooling source, supplying, via several outlets, customer replaceable units (CRUs), can tolerate the removal of a CRU from an outlet without loss of cooling to the remaining CRUs.

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Gate/Shutter Airflow Control Device

This article describes a method whereby the airflow from a common cooling source, supplying, via several outlets, customer replaceable units (CRUs), can tolerate the removal of a CRU from an outlet without loss of cooling to the remaining CRUs.

Enclosing one or more CRU devices within the confines of a single box imposes restrictions on the ability to maintain the devices within safe operating temperatures. Forced air cooling is thus required. In a situation where the number of CRUs can vary within the box, as required by the customer, airflow characteristics will also vary. Considering a situation where up to four CRUs may be installed (Fig.1), removal of one or more CRUs would cause an inbalance in the airflow through the overall enclosure. In this configuration two fans are employed, with air being drawn-in through the front cover 1 of the box and hence through each CRU fitted. Entry and exit slots are provided on each CRU, with all air drawn through the CRU, thus cooling its heat- sensitive parts. Where necessary, separate fans may be dedicated to groups of CRUs by partitioning interior airflow. Removing one CRU would allow air to pass through the area of least resistance, i.e., the resultant vacant space, thus inhibiting airflow through the remaining CRUs. It would, therefore, be necessary to install a dummy unit to replace the missing CRU, hence restoring the airflow balance.

A simple and effective alternative (Fig. 2) is...