Method for controlling the actual temperature of an intermittent

Details Method for controlling the actual temperature of an intermittent Method for controlling the actual temperature of an intermittent

1995-08-15

1998-05-12

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219501, 219492, 374102, 323236, H05B 102

Patent

active

057509611

ABSTRACT:
In a method for controlling the actual temperature of an intermittently operated heating means, at least one operating parameter is measured for a predetermined measuring time period (T) during a switch-on interval (86) of the heating means. On the basis of the measured value of the at least one operating parameter, the actual temperature of the heating element is detected. The length of the current switch-on interval (86) is changed in dependence on the result of a comparison between the actual temperature and a predetermined desired temperature. The minimum length of each switch-on interval (86) is equal to the measuring time period (T). The measuring time period (T) is selected to provide that, during the length of the measuring time period (T), the thermal energy supplied to the heating means is less than the thermal energy emitted during the following switch-off interval (88) extending up to the next switch-on interval (86).

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