JPS6429226A - High frequency heating apparatus - Google Patents

Abstract

PURPOSE: To enable a cooking operation depending on an intended purpose by selectively using the high-speed rotation of a kneading vane at the time of bread baking, and the low-speed rotation of a turntable at a high-frequency heating process via a transmission drive part. CONSTITUTION: A transmission drive part 16 is laid on the inner bottom of a heating chamber 1 formed to use a high-frequency oscillator and other heat sources as heating sources, and provided with the first drive shaft 17 made of a metallic cylinder and driven with a kneading motor 23, and the second drive shaft 27 made of a dielectric substance and driven with a motor 22 for a turntable. In addition, the shaft 17 is coaxially positioned along the outer surface of the shaft 27 and projected from the bottom of the chamber 1. A kneading vane 14 is connected to the shaft 17 via a coupling piece 35 of dielectric substance, and the turntable is connected to the shaft 27. Furthermore, a container 12 is fitted with a support seat 42 and the bottom of the chamber 1 is fitted with a fastener 44 to be coupled to the support seat 42. Also, a circular hole 50 is drilled through the center of the fastener 44. The shaft 17 and the coupling piece 37 are passed through the hole 50, and the diameter D of the hole 50 is kept at a value equal to or less than the cutoff size of the basic mode of a circular waveguide for an applicable high frequency.