US Patent 7659493 Heating system and method

A fluid heating system includes a fluid receptacle having a fluid reservoir, and a heating control system configured to heat fluid retained within the fluid reservoir. The heating control system includes a processing unit, at least one fluid temperature sensor positioned on or within the fluid receptacle, a heating element configured to heat fluid within the fluid reservoir, and a power switch disposed within an electrical path between the heating element and the processing unit. The processing unit is configured to selectively activate and deactivate the heating element through the power switch based on the fluid temperature detected by the fluid temperature sensor.