Gas and liquid contact apparatus – Fluid distribution – Pumping
Patent
1992-12-23
1994-12-20
Drodge, Joseph W.
Gas and liquid contact apparatus
Fluid distribution
Pumping
62171, 137 93, 261DIG46, 324439, 324446, F25B 3902
Patent
active
053743806
ABSTRACT:
Salinity control of sump water in an evaporative cooler (10) wherein a pump (19) continuously impels a water flow from a sump (11) to an evaporative surface where some of the water is evaporated by air flow from a fan (15, 16). Control is affected by sensing electrical resistance of the sump water with monel probes (36) energised with low voltage alternating current, and initiating an "ON" period of a timer (quad NOR gate) when resistance drops below a preset level. During the "ON" period a solenoid valve (25) is opened in a bleed line and some only of the pumped sump water is passed to drain, without interruption of cooler operation.
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Munters' brochure, containing product specification and performance data for CELdek/COOLdek, pp. 20-21, date unknown.
Drodge Joseph W.
F F Seely Nominees Pty Ltd.
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