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US 4,399,864 AGranted
Controlling room-air temperature and humidity in an air-conditioning system
AssigneeThe Bahnson Company
InventorRoger H. Lamar
Life of this patent
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AssigneeThe Bahnson Company
InventorRoger H. Lamar
Estimating the term…
An air-conditioning system for a work space in which recirculated air is mixed with outside air and the mixture is passed through a washer. The controls for the system include an absolute moisture controller in the primary air supply downstream from the air washer, a direct-acting humidistat for the room air and a reverse-acting thermostat for the room air. The proportional output signals of the thermostat and humidistat are fed to a high-and-low signals selector which transmits the higher of the two signals to a heating control for the recirculated air and the lower of the two signals to a throttling valve for the air washer. In normal operation, the air washer is fully throttled before the heating control is activated to supply heat to the recirculated air since the heating control is responsive to a pressure above the range of pressures which are effective to modulate the washer sprays. Under special conditions, the throttling of the spray in the air washer is reduced after the heating control is activated so as to increase the humidification effected by the air washer.
In an air conditioning system to maintain a selected dry bulb temperature and relative humidity in a work space, said system having
A method of maintaining a selected dry bulb temperature and relative humidity in a work space comprising the steps of generating a first signal proportional to the dry bulb temperature of the work space and a second signal proportional to the relative humidity of the work space, withdrawing room air from said work space, mixing at least a portion of said room air with fresh air to produce a mixture of primary air, driving said primary air through an air washer having a dewpoint sensor tending to maintain the dewpoint temperature of the primary air leaving the washer substantially constant, introducing said primary air into the work space, throttling the spray in said washer in response to signals indicating a high humidity and a low dry bulb temperature, and thereafter heating the recirculated room air prior to mixing it with fresh air when the signals indicate that the throttling is not effective to maintain said selected conditions.
A method of maintaining preselected room air conditions, namely the dry bulb temperature and the wet bulb temperature, in a work space having heat-generating means comprising
Dependencies are inferred from the claim text.