Abstract: A microwave oven includes a heating chamber, a plurality of cooking utensils detachably disposed in the heating chamber selectively in accordance with the cooking contents, a plurality of heat sources heating food placed on or contained in the cooking utensil and including a magnetron, an oven heater and a grill heater, optical sensors determining the cooking utensil disposed in the heating chamber, and a microcomputer. The cooking utensils include a glass dish, thawing gridiron, pot, upper and lower top plates, one-legged top plate, and gridiron. A microwave cooking mode is selected when the determination of the optical sensors indicates that neither upper nor lower top plate is present in the heating chamber. A heater cooking mode is selected when either upper or top plate is present. When the heater cooking mode is selected on the basis of presence of the upper top plate, either an oven mode or a grill mode is selected depending upon presence or absence of the gridiron.

Abstract: A heating apparatus such as microwave ovens includes a menu display for displaying a plurality of cooking menu groups each including a plurality of cooking menus, a menu selecting dial turned in one of two directions so that one of the cooking menu groups displayed on the menu display is selected, the menu selecting dial being turned in the other direction so that one cooking menu is selected from the selected cooking menu group, a heater for heating food to be cooked, and a heating control device for controlling the heater so that heating is automatically executed in accordance with the cooking menu selected by a turn of the menu selecting dial.

Abstract: A microwave oven is provided with a machine chamber underside of a heating chamber, and a magnetron and a high-voltage transformer provided in the machine chamber are cooled by a pair of cooling fans also disposed in the machine chamber. One of the cooling fans driven directly by a fan motor cools the transformer and the other cooling fan cools the magnetron driven by the fan motor through transmission means, such as a belt. A frame-shaped member is provided in the machine chamber for defining the height of the chamber and for rigidifying the structure thereof, so that the outer diameters of the cooling fans can be effectively selected so as to reduce noise and vibration caused in the machine chamber.

Abstract: A door of a microwave oven comprises a frame-like door plate having a central window, upper and lower sashes secured to the door plate, a screen to cover the central window, outer and inner barriers for protecting the screen, and a contact plate to be brought into contact with a peripheral portion of the oven. A door cover made of a heat-resistant material is provided around the contact plate and engageable portions are provided for securing the door cover in its position without utilizing machine screws and the like.

Abstract: A microwave oven having an oven cabinet is provided with a heating chamber formed in the cabinet such that microwave heating and ordinary electrically resistive heating can be carried out. An oven door is pivotably mounted on the front side of the heating chamber and an inclined control panel is disposed below the oven door such that the panel inclines downwardly and projects forwardly from the front side of the cabinet to define an encasing portion for at least a part of electric components of the microwave oven underneath the heating chamber.