Patent ID: 6018158
Filing Date: 2000-01-25
Classification: F24C,H05B

Abstract:
A microwave oven comprising:a casing arrangement including:an inner casing forming a cooking chamber, andan outer casing enclosing the inner casing, the outer casing having a suction port formed in a lower side thereof and an exhaust port formed in an upper side thereof,the casing arrangement forming a machine chamber disposed between the inner and outer casings, the machine chamber containing a microwave generating mechanism;an air duct formed between the inner casing and the outer casing and interconnecting the suction port and the exhaust port, the air duct providing a passage for guiding air drawn through the suction port to the exhaust port, the air duct including a vertically extending portion disposed beside and outside of the cooking chamber at a location spaced from the machine chamber, the vertically extending portion extending from a bottom of the cooking chamber to a top of the cooking chamber; andan axial fan installed in the vertically extending portion of the air duct, the axial fan having blades disposed helically around a vertical axis, and the axial fan rotating about the vertical axis so as to draw air into the air duct through the first suction port and exhaust air from the air duct through the exhaust port.