Browse Prior Art Database

Disk File Humidity Control System

IP.com Disclosure Number: IPCOM000080593D
Original Publication Date: 1974-Jan-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Martin, RL: AUTHOR [+2]

Abstract

A humidity control system has an enclosure 10 with an intake valve 12 and exhaust valve 14. When drive power is off, the valves are closed, thereby trapping a volume of air within the enclosure. Desiccant beds 16 near each valve 26 draw moisture from the entrapped air, thereby maintaining the humidity in the enclosure at a desired level. Each bed 16 is equipped with a filter 20 to prevent particles and contaminants from entering it. Two foam layers 22 and wire screen 24 protect the filter 20.

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Disk File Humidity Control System

A humidity control system has an enclosure 10 with an intake valve 12 and exhaust valve 14. When drive power is off, the valves are closed, thereby trapping a volume of air within the enclosure. Desiccant beds 16 near each valve 26 draw moisture from the entrapped air, thereby maintaining the humidity in the enclosure at a desired level. Each bed 16 is equipped with a filter 20 to prevent particles and contaminants from entering it. Two foam layers 22 and wire screen 24 protect the filter 20.

With power on, the valves 12 and 14 open. Ambient air is drawn into the enclosure 10 and is circulated past the desiccant beds 16 and exited through the exhaust valve 14. As the air circulates past electrical components in the enclosure, it is heated to 50 Degrees F above ambient, thereby maintaining the desired low humidity. Heat from the air circulating system also regenerates the desiccant, which precludes the need for external heat and special valves for redirecting the air. The air is not passed through the desiccant bed 16, but across it. As a result, the system does not experience an undesirable pressure drop.

Relief valves 26 are needed in closed-loop applications to provide a moisture path to the outside, to prevent a continual build up of moisture after repeated on- off cycling, but they are not required for open-loop applications.

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