Abstract: There is disclosed a heating cooking device including a heating chamber for heating an object to be heated, a high-frequency oscillator for generating high-frequency electromagnetic waves, a wave guide for guiding the high-frequency electromagnetic waves from the high-frequency oscillator to the heating chamber, a rotary table for supporting thereon the object to be heated for rotation therewith, and a wave stirrer fan for stirring the electromagnetic waves in the heating chamber. A feeder port of the wave guide is disposed at a side of the heating chamber, and the wave stirrer fan is disposed within the wave guide in opposed relation to the feeder port. The high-frequency oscillator is disposed on the side of the feeder port. The feeder port is larger in size than the wave stirrer fan.

Abstract: A cooking heating apparatus has a vapor sensor for sensing the state of heating of food in a heating chamber, thus performing automatic control of the heating operation. An auxiliary exhaust opening for allowing vapor from the heated food to be introduced to the vapor sensor is formed in a region where the flow of the vapor is not influenced by a main flow of air supplied into the heating chamber and flowing towards a main exhaust opening. The vapor sensor is disposed so as to be exposed to the vapor introduced through the auxiliary exhaust opening. The condition of the vapor is therefore sensed quickly without being influenced by the main flow of air.

Abstract: A heating appliance has a control system which is arranged such that when an internal electrically rewritable nonvolatile memory is utilized in the heating appliance for cooking foods with heat, the protection of data, an the rewriting of data and the collation of data are carried out positively and with great accuracy. A heating appliance employing such a nonvolatile memory is provided with a protection circuit for preventing the destruction of data stored in the memory when the power source is turned on and off and a main control section is provide for the periodic rewriting of memory data, whereby the data are protected against destruction and aging. Moreover, when reading the data stored in memory the collation of the data is carried out at least twice and when writing in data, the data so written is immediately read out and collated with RAM data in the main control section for improved resistance to noise.

Abstract: A microwave heater for thawing a frozen cake uniformly and in a short time. The frozen cake is placed on a high-frequency transmissive resin tray having at the bottom thereof an aluminum plate, and the cake is covered by a cup-shaped aluminum container. The cup-shaped aluminum container and the aluminum plate are respectively provided with a plurality of apertures, and radiation of microwave energy to the frozen cake is controlled with respect to the amount and direction of its introduction by selecting the sizes and positions of the apertures of the cup-shaped container and the aluminum plate.

Abstract: A microwave oven with an improved electric field distribution in the oven is provided. By properly establishing the position of a high frequency oscillator when it is directly affixed to a heating cavity or the position of a feeding opening when the feed through a wave guide is employed, with respect to the dimension of the heating cavity, the electric field distribution is improved and the efficiency is enhanced.