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US 4,572,428 AGranted
In duct atomizing humidification and evaporative cooling system
AssigneeHerrmidifier Company, Inc.
InventorsGordon S. Groff, Dean S. Herr
Life of this patent
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AssigneeHerrmidifier Company, Inc.
InventorsGordon S. Groff, Dean S. Herr
Estimating the term…
An in duct humidification and evaporative cooling system for industrial and commerical buildings is disclosed. Air and water under pressure are utilized to atomize water into minute droplets which rapidly evaporate and raise the level of relative humidity while producing evaporative cooling. A first relative humidity sensor/transmitter produces a signal proportional to the relative humidity of return air, and a second relative humidity sensor/transmitter provides a signal proportional to the relative humidity of supply air. Preset receiver-controllers external to the duct receive the two signals and send them to a low signal selector which in turn sends the lower signal to a modulating water valve and to an electrical switch which opens a valve in the pressurized air supply line. A second electrical switch operatively connected in the air supply line opens a valve in the pressurized water supply line. Air and water from the two supply lines are delivered to in duct air and water manifolds and to spray heads on the air manifold to maintain automatically the required humidification and cooling parameters.
An in duct humidification and evaporative cooling system comprising in duct air and water manifold means including air/water spray heads, a first in duct relative humidity sensor/transmitter producing a signal proportional to the relative humidity of duct return air, a second in duct relative humidity sensor/transmitter producing a signal proportional to the relative humidity of duct supply air, first and second preset external receiver-controllers receiving the two signals produced by said first and second relative humidity sensor/transmitters, an external low signal comparator-selector receiving separate output signals from the first and second preset receiver-controllers which are proportional to the amounts which the set points of the two receiver-controllers exceed the actual relative humidity levels of the duct return and supply air being sensed by the first and second in duct humidity sensor/transmitters, pressurized air and water supply lines connected with said air and water manifold means, a water modulating valve connected in said pressurized water supply line and receiving the selected low signal from said low signal comparator-selector, an on-off valve connected in each of said pressurized air and water supply lines, and means responding to the selected low signal from said low signal comparator-selector and being connected with and operable to open and close said on-off valves of the pressurized air and water supply lines.
An in duct humidification and evaporative cooling system as defined in claim 12, and said control signal transmission means comprising a control air supply line, the signals produced by the first and second in duct relative humidity sensor/transmitters, by the first and second preset external receiver-controllers and by the external low signal comparator-selector all comprising pneumatic pressure signals, and said means responding to the selected low signal from said low signal comparator-selector being a pneumatic pressure signal responsive means.
A humidification and evaporative cooling system for a building having a main air duct leading to a number of branch air ducts, the system comprising a first relative humidity sensor/transmitter mounted within the main air duct and producing a pneumatic pressure signal proportional to the relative humidity of the return air in the duct, a second relative humidity sensor/transmitter mounted within the main air duct substantially downstream from the first relative humidity sensor/transmitter and near a first obstruction in the main air duct and producing a pneumatic pressure signal proportional to the relative humidity of the supply air in the main air duct, first and second preset receiver-controllers externally of the main air duct and connected with and receiving pneumatic pressure signals of different magnitudes produced by the first and second relative humidity sensor/transmitters and outputting pneumatic pressure signals of different magnitudes, a low pneumatic pressure signal comparator-selector receiving the two signals from said first and second receiver-controllers and outputting the pneumatic pressure signal having the lower magnitude delivered to said comparator-selector, pressurized air and water supply lines arranged externally of the main air duct, air and water manifolds arranged within the main air duct between the first and second relative humidity sensor/transmitters and extending across the longitudinal axis of the main air duct and being connected respectively with said pressurized air and water supply lines, air/water spray heads on the air manifold and having air inlets in communication with the air manifold, water delivery tubes connected between the water manifold and water inlets of the air/water spray heads, a water modulating valve connected in said pressurized water supply line and receiving the lower pneumatic pressure signal from said low signal comparator-selector, an on-off solenoid valve connected in the pressurized air supply line, another on-off solenoid valve connected in the pressurized water supply line, pneumatic pressure signal responsive electric switching means receiving and responding to said lower pneumatic pressure signal from said comparator-selector and having a connection with the pressurized air supply line and being operable to open and to simultaneously close said on-off valves in the pressurized air and water supply lines, and control air supply means connected with the first and second preset receiver-controllers and said low signal comparator-selector.
Dependencies are inferred from the claim text.