Patent ID: 8101890
Filing Date: 2012-01-24
Classification: F24C

Abstract:
1. A fan apparency arrangement for an appliance of the type comprising a fan for moving air in an interior of the appliance, the arrangement comprising: a pipe disposed in the airflow path of the fan and comprising a first end and a second end; a heater disposed in the pipe, the heater being energized when the fan is turned on; a thermal switch disposed in the pipe, the thermal switch being closer to the first end than the heater, wherein the fan is operative in normal operation to move air in the pipe in a direction from the first end to the second end, and wherein the pipe is disposed so that when the fan fails to move air in the pipe after turned on, air heated by the heater passes the thermal switch in a direction from the second end to the first end to activate the thermal switch to signal malfunction of the fan.