Gas and liquid contact apparatus – Fluid distribution – Pumping
Patent
1992-04-23
1993-03-09
Miles, Tim
Gas and liquid contact apparatus
Fluid distribution
Pumping
261 29, 2611122, 261 97, 261DIG46, 415 13, B01F 500, B01F 304
Patent
active
051924641
ABSTRACT:
Improvements to an evaporative cooler having a direct drive fan include mutual adjustment of motor speed and fan blade pitch, a simplified, clog resistant water distribution system, a fan shroud creating minimal air flow noise, and a fouling sensor in the water supply. An adjustable variable frequency controller determines motor speed, which complements selected fan blade pitch to operate the fan at a desired speed consistent with avoiding resonance and vibration. The fan shroud has a canted top surface and rounded corners to minimize air flow disturbance. A sensor monitors the water supply for excessive mineral fouling, and activates a drain valve if a present threshold is encountered. A refill valve enables resupply with fresh, unfouled water.
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Pawlowski Andrew
Pawlowski Lech
Litman Richard C.
Miles Tim
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