Patent number: 8959794
Process and apparatus to control the airflow in dehumidifying dryers
Inventors:
- Graeff; Roderich W.
Field of technology: Electronics, Industrial Machinery and Processes
Patent granted on: Tue, 24 Feb 2015
Abstract
A control system for dryers in which the rotation speed of the motors are changed through frequent on/off connections to the electric power line. In accordance with the invention this task is solved by interrupting the electric power driving the electric motor for short periods in such a way that the motor does not come to a complete standstill or remains at a constant speed below the maximum speed. The motor power interruption or application is based upon readings of sensors reading dryer parameters other than the actual speed of the motor being controlled.