Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1996-02-27
1997-11-25
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219501, 219209, 219505, 62 32, 62 37, 363 78, H05B 102
Patent
active
056908490
ABSTRACT:
A current control circuit for improved power application and control of thermoelectric devices to maintain the temperature of thermoelectric devices at a set point. The circuit includes at least one thermoelectric device, an inductor device, a current sensor and a switch device operatively connected in a series connection across a pair of terminals to allow current to flow therethrough when the switch device is activated to the "on" condition; a temperature sensor operatively positioned to monitor the temperature associated with the at least one thermoelectric device; a comparator device receives an input from the current sensor and provides an output to the switch device; a programmable control device receives an input from the temperature sensor and provides an output to the comparator device, the value of the output is determined by the difference between the sensed temperature of the at least one thermoelectric device and the desired set point temperature of the at least one thermoelectric device. The comparator device activates and deactivates the switch device, determined by the output of the programmable control device, to allow current to flow through the at least one thermoelectric device to achieve the set point temperature.
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DeVilbiss Roger S.
Powell Harry C.
Quisenberry Tony M.
Paschall Mark H.
Thermotek, Inc.
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