Patent ID: 8253076
Filing Date: 2012-08-28
Classification: A61M,F24H,H01F

Abstract:
1. A heater unit adapted to be used with a water container in a respiratory system and configured to be cooled by natural convection, the heater unit comprising: a housing having an air inlet adjacent a bottom thereof and an air exhaust adjacent a top thereof and defining an interior chamber therebetween; a heated hot plate supported adjacent the top of the housing; locking structure on the housing adapted to selectively secure a water container to the housing in thermal communication with the hot plate; an electrical transformer and a power switch within the interior chamber of the housing; a heat sink within the interior chamber of the housing and in thermal communication with the power switch; the transformer and the heat sink being positioned such that a natural convection air path carries air from the air inlet, upwardly through the transformer, upwardly through the heat sink, and out the air exhaust.