US Patent:
20090133283, May 28, 2009
Inventors:
Michael Paul Ricklefs - Webster City IA, US
Brian Douglas Ripley - Webster City IA, US
Sean Florian Myers - Ames IA, US
Scott David Tosten - Duncombe IA, US
Brian James Kierzek - Webster City IA, US
Ian Tomas Fitzgerald - Webster City IA, US
International Classification:
F26B 3/04
F26B 11/04
Abstract:
To control a temperature of a dryer system, particularly a laundry dryer, an ON/OFF relay control is employed to switch heater loads. A plurality of heating elements is used in order to more precisely regulate the temperature inside the dryer system. Further, a heating control system that includes a plurality of symmetric heating elements and a control circuit is used to maintain equal distribution of relay switching loads, resulting in an extended lifetime of each individual relay. Asymmetric heating elements may also be used.