| 摘要 |
A cooking appliance includes a cabinet forming an oven cavity, and bake and broil heating elements. A convection system develops a flow of heated air within the cavity. The convection system includes a motor-driven fan, a convection heating element, and a controllable switch for controlling an electrical power circuit for the motor. A user interface device allows user selections of convection bake and convection roast operations. A controller communicates with the interface device and controls activations of the fan and the heating elements. The controller has an output for controlling operations of the controllable switch. During convection baking, the controller activates the bake and convection heating elements and controls the controllable switch so that the fan runs at a first speed. During convection roasting, the controller activates the bake and convection heating elements and controls the controllable switch so that the fan runs at a second, higher speed.
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