Process and apparatus to control the airflow in dehumidifying dryers

Patent No. 8,959,794

Issued: February 24, 2015
Filed: October 17, 2012
Term Extension: 288 days

Inventor: Roderich W. Graeff (Palm Springs, CA)


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.

Reference to Related Applications

This application claims one or more inventions which were disclosed in Provisional Application No. 61/548,485, filed Oct. 18, 2011, entitled "Process and apparatus to control the airflow in dehumidifying dryers". The benefit under 35 USC 119(e) of the United States provisional application is hereby claimed, and the aforementioned application is hereby incorporated herein by reference.


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