Apparatus for cooling liquid and collection assembly therefor

Abstract

A liquid collection assembly positionable between a fill material and a fan of a cooling tower for collecting liquid gravitating through the fill material while allowing air to pass up to the fill material. The liquid collection assembly includes a plurality of trough assemblies supported in a spaced apart, vertically overlapping relationship to provide a uniform path for rising air, to capture the down flowing liquid, to provide a barrier between the liquid distribution system and the fan, and to carry the liquid into the at least one gutter. The trough assemblies are supported by a first end plate and a second end plate through which trough assemblies extend.

What is claimed is: 
     
         1 . A liquid collection assembly positionable between a fill material and a fan of a cooling tower for collecting liquid gravitating through the fill material while allowing air to pass up to the fill material, the liquid collection assembly comprising:
 a plurality of trough assemblies supported in a spaced apart, vertically overlapping relationship to define a plenum between adjacent trough assemblies and to capture the down flowing liquid, to provide a barrier between the liquid distribution system and the fan, and to carry the liquid into the at least one gutter, at least a portion of the trough assemblies comprising:
 a trough having a liquid receiving channel, a first side, a second side, a first end, a second end, and upper end, and a lower end; and 
 a liquid diverter plate having a first end, a second end, a proximal end, a distal end, an upper surface, and a lower surface, the liquid diverter plate extending upwardly and laterally away from the trough so liquid flowing onto to the upper surface flows into the trough, the distal end of the liquid diverter plate positioned vertically above a trough of an adjacent one of the trough assemblies; 
 a damper plate having a first end, a second end, a proximal end, a distal end, an upper surface, and a lower surface, the damper plate extending laterally away from the second side of the trough and rotatable about an axis of rotation between a closed position wherein the damper plate extends between the second side of the trough and the trough of the adjacent one of the trough assemblies to cover the space between the trough and the adjacent trough with the proximal end of the damper plate positioned adjacent the second side of the trough and the distal end positioned adjacent the adjacent trough and an open position wherein distal end of the damper plate is spaced from the adjacent trough, the axis of rotation being spaced from the proximal end of the damper plate toward the distal end of the damper plate so a first portion of the damper plate extends between the proximal end of the damper plate and the axis of rotation and a second portion of the damper plate extends between the axis of rotation and the distal end of the damper plate in a way that the first portion provides a counterbalance force to the second portion to assist in moving the damper plate from the closed position to the open position; 
   a first end plate attached to the first end of the trough and the first end of the liquid diverter plate; and   a second end plate through which the second end of the trough and the second end of the liquid diverter plate extend, the second end plate having a plurality of openings corresponding to the liquid receiving channels of the troughs.   
     
     
         2 . The assembly of  claim 1 , wherein the first portion of the damper plate has at least one longitudinal bend defining the proximal end. 
     
     
         3 . The assembly of  claim 1 , wherein the axis of rotation is substantially vertically aligned with the second side of the trough. 
     
     
         4 . The assembly of  claim 1 , wherein the second side of the trough is shorter between the upper end and the lower end than the first side of the trough, and wherein the axis of rotation is positioned in the liquid receiving channel of the trough and adjacent the second side of the trough. 
     
     
         5 . The assembly of  claim 1 , wherein the damper plate is pivotally coupled to the first end plate and the second end plate. 
     
     
         6 . The assembly of  claim 5 , wherein the proximal end of the liquid diverter plate is spaced from the upper end of the trough to define a gap, and wherein the first portion of the damper plate moves in the gap as the damper plate moves between the closed position and the open position. 
     
     
         7 . The assembly of  claim 6 , wherein the damper plate covers the gap when the damper plate is in the open position. 
     
     
         8 . The assembly of  claim 1 , wherein the proximal end of the liquid diverter plate is spaced from the upper end of the trough to define a gap, and wherein the first portion of the damper plate moves in the gap as the damper plate moves between the closed position and the open position. 
     
     
         9 . The assembly of  claim 8 , wherein the damper plate covers the gap when the damper plate is in the open position. 
     
     
         10 . The assembly of  claim 9 , wherein at least a portion of the damper plate substantially conforms to the contour of the liquid diverter plate when the damper plate is in the open position. 
     
     
         11 . An apparatus, comprising:
 a housing having at least one gutter;   a body of fill material disposed in the housing;   a liquid distribution system disposed in the housing and positioned above the fill material for distributing liquid on top of the fill material so the liquid gravitates downward through the fill material;   a fan positioned below the body of fill material for blowing air upward through the fill material; and   a liquid collection assembly positioned between the fill material and the fan for collecting the liquid gravitating through the fill material while allowing air to pass up to the fill material, the liquid collection assembly comprising:
 a plurality of trough assemblies supported in a spaced apart, vertically overlapping relationship to define a plenum between adjacent trough assemblies and to capture the down flowing liquid, to provide a barrier between the liquid distribution system and the fan, and to carry the liquid into the at least one gutter, at least a portion of the trough assemblies comprising:
 a trough having a liquid receiving channel, a first side, a second side, a first end, a second end, and upper end, and a lower end; 
 a liquid diverter plate having a first end, a second end, a proximal end, a distal end, an upper surface, and a lower surface, the liquid diverter plate extending upwardly and laterally away from the trough so liquid flowing onto to the upper surface flows into the trough, the distal end of the liquid diverter plate positioned vertically above a trough of an adjacent one of the trough assemblies; and 
 a damper plate having a first end, a second end, a proximal end, a distal end, an upper surface, and a lower surface, the damper plate extending laterally away from the second side of the trough and rotatable about an axis of rotation between a closed position wherein the damper plate extends between the second side of the trough and the trough of the adjacent one of the trough assemblies to cover the space between the trough and the adjacent trough with the proximal end of the damper plate positioned adjacent the second side of the trough and the distal end positioned adjacent the adjacent trough and an open position wherein distal end of the damper plate is spaced from the adjacent trough, the axis of rotation being spaced from the proximal end of the damper plate toward the distal end of the damper plate so a first portion of the damper plate extends between the proximal end of the damper plate and the axis of rotation and a second portion of the damper plate extends between the axis of rotation and the distal end of the damper plate in a way that the first portion provides a counterbalance force to the second portion to assist in moving the damper plate from the closed position to the open position; 
 
 a first end plate attached to the first end of the trough and the first end of the liquid diverter plate; and 
 a second end plate through which the second end of the trough and the second end of the liquid diverter plate extend, the second end plate having a plurality of openings corresponding to the liquid receiving channels of the troughs. 
   
     
     
         12 . The apparatus of  claim 11 , wherein the first portion of the damper plate has at least one longitudinal bend defining the proximal end. 
     
     
         13 . The apparatus of  claim 11 , wherein the axis of rotation is substantially vertically aligned with the second side of the trough. 
     
     
         14 . The apparatus of  claim 11 , wherein the second side of the trough is shorter between the upper end and the lower end than the first side of the trough, and wherein the axis of rotation is positioned in the liquid receiving channel of the trough and adjacent the second side of the trough. 
     
     
         15 . The apparatus of  claim 11 , wherein the damper plate is pivotally coupled to the first end plate and the second end plate. 
     
     
         16 . The apparatus of  claim 15 , wherein the proximal end of the liquid diverter plate is spaced from the upper end of the trough to define a gap, and wherein the first portion of the damper plate moves in the gap as the damper plate moves between the closed position and the open position. 
     
     
         17 . The apparatus of  claim 16 , wherein the damper plate covers the gap when the damper plate is in the open position. 
     
     
         18 . The apparatus of  claim 11 , wherein the proximal end of the liquid diverter plate is spaced from the upper end of the trough to define a gap, and wherein the first portion of the damper plate moves in the gap as the damper plate moves between the closed position and the open position. 
     
     
         19 . The apparatus of  claim 18 , wherein the damper plate covers the gap when the damper plate is in the open position. 
     
     
         20 . The apparatus of  claim 19 , wherein at least a portion of the damper plate substantially conforms to the contour of the liquid diverter plate when the damper plate is in the open position.