Whirlpool Corporation
Microwave oven having door with transparent panel

Abstract:

A microwave oven includes a cooking cavity having an opening, a source of microwave radiation that transmits microwaves into the cooking cavity, a door positioned adjacent the opening and movable between an open position where the cooking cavity can be accessed through the opening and a closed position where the cooking cavity is inaccessible through the opening. The door further includes a transparent glass panel where the cooking cavity is viewable through the door when the door is in the closed position. The transparent glass panel has at least one surface with a measurable resistance across its surface. The microwave oven further has a circuit connected to the transparent glass panel that measures the sheet resistance of the transparent glass panel.