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Controlling energy in an air-conditioning system

  • US 4,506,514 A
  • Filed: 04/30/1984
  • Issued: 03/26/1985
  • Est. Priority Date: 04/30/1984
  • Status: Expired due to Fees
First Claim
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1. In an air conditioning system to maintain a selected temperature and humidity in a work space,said system having an air washer with an inlet connected to recirculated-air and outside-air ducts and an outlet connected to work-space inlets, damper means in said ducts having a controller to proportion the recirculated and outside air admitted to said washer, throttling means to modulate the flow of water through said washer;

  • cooling means coupled to said washer to modulate the cooling effect of said washer; and

    means responsive to the dewpoint temperature of the air passing through said washer outlet and responsive to the humidity and the temperature in said work space transmitting input signals to said damper control, to said throttling means and to said cooling means to modulate the temperature and the moisture content of the washer air issuing from said outlet;

    the improvement comprisingsensors to generate enthalpy signals indicating the levels of enthalpy of the recirculated air, the outside air, and the washer air issuing from said outlet respectively; and

    a selector control receiving said enthalpy signals and operable to selectively interrupt the transmission of said input signals to said damper control and to said cooling means and selectively operable to transmit an auxiliary signal to said damper controller to control said dampers when its input signal is interrupted.

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