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Self-Balancing Air Flow Distribution Mechanism

IP.com Disclosure Number: IPCOM000060387D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 83K

Publishing Venue

IBM

Related People

Correa, RJ: AUTHOR [+3]

Abstract

A technique is described whereby air flow distribution throughout a computer system is controlled and dispersed, through the use of self- balancing baffles, based on the cooling requirements of installed circuit cards. Computing systems require the ability to install or remove operational features applicable to the customers' requirements. Circuit cards are added or removed, as required, to provide the flexibility to configure systems to many different configurations. This flexibility has caused an unbalance to the cooling system, when either fully populated or partially populated with circuit cards, assuming the same blower system is retained in all cases. The technique described herein provides a mechanism to automatically self-balance the air flow requirements to compensate for the variations in feature configurations.

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Self-Balancing Air Flow Distribution Mechanism

A technique is described whereby air flow distribution throughout a computer system is controlled and dispersed, through the use of self- balancing baffles, based on the cooling requirements of installed circuit cards. Computing systems require the ability to install or remove operational features applicable to the customers' requirements. Circuit cards are added or removed, as required, to provide the flexibility to configure systems to many different configurations. This flexibility has caused an unbalance to the cooling system, when either fully populated or partially populated with circuit cards, assuming the same blower system is retained in all cases. The technique described herein provides a mechanism to automatically self-balance the air flow requirements to compensate for the variations in feature configurations. Blower 10 and plenum 11, as shown in Fig. 1, are used to provide the air flow to the circuit cards. When circuit cards 12, which contain the required features, are installed, baffle door 13 is automatically opened to a maximum of 80 degrees to allow air to flow to the circuits. When a card is not installed, baffle door 13 is closed, allowing only 50 percent of the total permissible air to flow through the empty slot. Blower stalling could occur if the air flow was reduced below 50 percent. When circuit card 12 is installed, its cover 14 engages striker edge 15 of baffle door 13. Pivots 16, at both t...