Condition and volume control for air conditioning system mixing dampers

摘要

In an air conditioning system wherein the outdoor air and recirculated air mixing dampers are operated to control the volume and condition, such as temperature, of the mixture of outdoor air and return air to be discharged to at least one zone, a control apparatus is disclosed having sensors for sensing the condition and volume of the mixture and a control system responsive to the sensors for controlling the operation of the outdoor air and recirculated air dampers for maintaining a predetermined condition and a predetermined volume of the mixture. In addition, an exhaust air damper may also be provided, controlled by the control system, for regulating the amount of air returned for the system.