Airflow volume control for ventilation of air conditioning unit - has throttle system with venturi nozzle for pressure difference monitoring connected to servo motor via pressure regulator

摘要

A volume control device, for use in ventilation plants in partic for air conditioning systems having a throttle arrangement which can be adjusted by a servo motor which adjusts the air flow within the air conditioner, has a venturi nozzle (13) situated upstream of the throttle control device (11). The actual value of the air flow volume is monitored by the venturi nozzle (3) as a pressure difference and this pressure difference is transmitted to a pressure difference regulator (17) which in turn controls operation of the servo motor (22).