Abstract: Provided is an air flow passage of a microwave oven including: a cavity for accommodating foods therein; an electric component chamber disposed at a predetermined portion of the cavity; a suction hole formed at one sided portion of the cavity such that the cavity communicates with the electric component chamber; an exhaust hole formed at the other sided portion of the cavity, through which air sucked through the suction hole is exhausted; an exhaust guide covering an outer wall of the cavity where the exhaust hole is formed, for guiding air exhausted through the exhaust hole to an outside of the microwave oven; and a back plate having an exhaust passage hole communicating with one end of the exhaust guide, through which air is exhausted. According to the present invention, hot air of an inside of the microwave oven can be smoothly exhausted. In particular, since the exhausted air does not return to the electric component chamber, cooling efficiency can be enhanced.

Abstract: A door assembly for a microwave oven is provided. The door assembly includes a door panel at one side of the door, with a push bar and a latch each projecting toward a body portion of the microwave oven. A latch board including levers each rotatably coupled thereto contact either the latch or the push bar to operate switches which contact the levers. The door assembly provides a simple and convenient assembly structure for a door of a microwave oven.

Abstract: A cooking chamber assembly in a microwave oven for improved which improves air tightness in the cooking chamber, and reduces assembly complexity, time, and cost. A tray which essentially forms a bottom surface of a cooking chamber of the microwave oven is surrounded by a unitary gasket. A groove formed in an inner edge of the unitary gasket is designed to receive an outer edge of the tray, and a lip formed on an outer edge of the unitary gasket is designed to provide an air tight seal with an inner surface of a case of the cooking chamber. An air duct which guides circulating air is attached to an inner portion of the case with a series of hooks, allowing the air duct to be attached without separate fastening members such as screws or bolts, thus further reducing manufacturing time and cost.

Abstract: Door assembly for a microwave oven including a door panel at one side of the door, having a push bar and a latch both projected from one side toward a body, and a latch board including levers each fitted rotatable at contact with the latch or the push bar, and switches each operable at contact with the lever, thereby providing a simple and convenient assembly structure.

Abstract: Cooking chamber assembly in a microwave oven for improved assembly and air tightness. A cooking chamber is formed inside of the case, and a tray is provided inside of the case to form a bottom of the cooking chamber. A unitary gasket has a groove in an inner edge for inserting on an edge of the tray, and a lip on an outer edge in contact with an inside surface of the case for enhancing air tightness. An air duct provided to a ceiling of the cooking chamber for guiding circulating air is attached to an inside of the case directly with hooks without fastening members, such as screws, or bolts.