TEMPERATURE CONTROL FOR VARIABLE VOLUME AIR CONDITIONING SYSTEM

摘要

ABSTRACT OF THE DISCLOSUREA temperature control is disclosed for a variablevolume air conditioning system of the type wherein electric motor-operated air valve means are provide for varying the volume andrelatively warm or relatively cool conditioned air supplied to aconditioned zone. The control includes zone thermostat means forproducing an electrical error signal having a magnitude whichvaries in a predetermined relationship with respect to a deviationin zone temperature, and changeover circuit means for varying saidpredetermined relationship in order to accommodate changeoverbetween heating and cooling, as sensed by duct temperature sensingmeans. The control further includes flow limit circuit means forimposing limits upon the maximum and minimum desired flow of con-ditioned air through the air valve means.