Control of relative humidity in machine enclosures

Details Control of relative humidity in machine enclosures Control of relative humidity in machine enclosures

B - Operations, Transporting

01

D

183/17

B01D 53/26 (2006.01) G11B 23/02 (2006.01)

Patent

CA 1143665

ABSTRACT Relative humidity within a machine enclosure is con- trolled by means of a desiccant and a circulatory breather flow through the enclosure walls. The desiccant absorbs moisture during power off periods to keep the relative humidity down. During power on periods the enclosure temp- erature rises which drives off the absorbed moisture from the desiccant. Operation of the machine also creates a pressure differential between two breather orifices in the enclosure walls so that there is a circulatory exchange of air between the enclosure and atmosphere. If the desiccant has absorbed a significant amount of moisture during power off periods, the moisture concentration within the enclosure will exceed that outside and there will be a net expulsion of moisture to partially recharge the desiccant.

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