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Browse Prior Art Database

Protection Device for Fluid Cooled Electrical Apparatus

IP.com Disclosure Number: IPCOM000052747D
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Gupta, OR: AUTHOR [+2]

Abstract

The drawing shows a portion of a side wall 2 and a back wall 3 of an enclosure for electrical apparatus such is a transistor device. The electrical apparatus produces heat, and the enclosure contains a pressurized fluid for cooling. A pressure sensor 4 signals a controller 5 when the pressure becomes higher or lower than a normal operating range.

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Protection Device for Fluid Cooled Electrical Apparatus

The drawing shows a portion of a side wall 2 and a back wall 3 of an enclosure for electrical apparatus such is a transistor device. The electrical apparatus produces heat, and the enclosure contains a pressurized fluid for cooling. A pressure sensor 4 signals a controller 5 when the pressure becomes higher or lower than a normal operating range.

The pressure sensor is conventional and includes a housing 6 that is mounted on wall 2 with a sealing ring 7. An orifice 8 in wall 2 permits fluid to flow between the electrical enclosure and a bellows 9. A spring 10 and an optional spring 11 are balanced against the force of the pressurized cooling fluid to give the outer face 14 of the bellows a normal position. As the pressure in the enclosure increases, the bellows face is moved to the right, and as the pressure is decreased, the bellows face is moved to the left. An electrode, represented schematically at 15, is arranged to contact bellows face 14 over a limited range of the motion of the bellows face to the left. Thus, a drop in pressure, which might be caused by a leak in the enclosure, is signaled to the controller by a break in the circuit, and an alarm can be sounded before the electrical device is damaged by overheating. The volume of the bellows may be about equal to the volume of the enclosure so that the bellows provides a substantial reservoir of cooling fluid in case a leak occurs.

An electrode 16 is...