| 摘要 |
In an electrical oven at least one corona generation electrode is provided to enhance heat and mass transfer. Food being cooked in the oven provides a second electrode which is normally supported on insulating support structure and provided with high potential through the use of a probe inserted into the food. A high voltage potential supply and constant current high voltage control are connected between the two electrodes. The corona generating electrode has a plurality of corona discharge generators with pointed or small diameter free ends fixed at their opposite ends to a common conductive base. The corona discharge generators are flexible and have current conducting capability and are connected to the conductive base so as to yield under pressure but to return to operative position upon imposition of corona producing potential. The corona discharge generators are preferably metallic foil, insulator sheet covered with foil or conductive fibers. It is desirable to provide internal resistance within the individual corona discharge generators by making them of somewhat resistive material, tipping them with resistive material or otherwise providing series resistance which will make it possible then for these flexible electrodes to be self-adjusting. Individual self-adjusting corona discharge generators withdraw from the other electrode to suppress an arc or various ones of them selectively withdraw to provide a profile conforming to the profile of the food constituting the other electrode even as it changes in the course of cooking.
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