Automated reversible-dryer control system
AssigneeIntraspec, Inc.
InventorArthur Sussman
Life of this patent
Estimating the term…
Abstract
A control system for a dryer capable of displacing a load to be dried in at least two directions periodically determines a time interval for the present temperature of the load to reach one predetermined temperature from another predetermined temperature while the load is being displaced in a selected one of the two directions. That time interval is representative of the present condition of the load. A comparater compares the time interval to a reference time interval which is representative of a desired condition of the load. A control circuit applies heat to the load to be dried in response to the result of the comparison. When the time interval equals the reference time interval the load has reached the predetermined desired condition and the dryer is shut off.
Claims42
A control system for a dryer displacing a load to be dried in at least two directions during operation and capable of applying heat to the load, control system comprising:
- means for periodically measuring a parameter representive of the moisture content of the load to be dried, said measurements substantially all occurring while the load is being displaced in a selected one of said two directions;
- means for determining the moisture content of the load from said measurements;
- and
- means for controlling the application of heat to the load to be dried in response to said determined moisture content.
A control system for a dryer displacing a load to be dried in at least two directions during operation and capable of cyclically applying heat to the load, said control system compromising:
- means for periodically measuring a time interval for the load to reach one predetermined temperature from another predetermined temperature to provide a series of time intervals, each time interval being measured while the load is being displaced in a selected one of said two directions;
- means for determining the moisture content of the load from said measurements;
- and
- means for controlling the application of heat to the load to be dried in response to said determined moisture content.
A method for controlling a dryer displacing a load to be dried in at least two directions during operation and capable of applying heat to the load, said method comprising:
- periodically measuring a parameter representative of the moisture content of the load to be dried, said measurements substantially all occurring while the load is being displaced in a selected one of said two directions;
- determining the moisture content of the load from said measurements;
- and
- applying heat to the load to be dried in response to a result of said comparison.
A method for controlling a dryer displacing a load to be dried in at least two directions during operation and capable of cyclically applying heat to the load, said method comprising:
- periodically measuring a time interval for the load to reach one predetermined temperature from another predetermined temperature to provide a series of time intervals, each time interval being measured while the load is being displaced in a selected one of said two directions;
- determining the moisture content of the load from said measurements;
- and
- applying heat to the load to be dried in response to a result of said comparison.
Dependencies are inferred from the claim text.