MICROWAVE HEATING DEVICE

摘要

A microwave heating device is provided to shield a broad frequency band of microwaves efficiently by forming an auxiliary groove on an inner wall of a groove of a filter. A microwave heating device includes a case, a door(200), a long groove(310), at least one projection(335), and an auxiliary groove(350). A heating chamber is formed inside the case. Microwave is irradiated to the heating chamber. The door opens or closes the heating chamber. The long groove is formed along an inner edge of the door. When the door is closed, an inner wall of the long groove is adjacent to the heating chamber. The projection is extended from the door in order to partially cover an inlet of the long groove. The auxiliary groove is formed in the inner wall to enlarge the inner space of the long groove.