| 摘要 |
PURPOSE:To make possible delicate temperature control of cooking food, by constituting the titled utensil wherein an oscillator composed of a piezoelectric body as an infrared detection means is used and the temperature of the cooking food is detected by oscillation frequency generated by irradiating infrared rays radiated from the cooking food to the piezoelectric body. CONSTITUTION:When a microwave is generated by acting a magnetron device 9, the microwave is absorbed to cooking food 11 and heat is generated from the inner part of the food 11. Infrared rays having mainly 5-20mum wavelength are radiated from the cooking food 11 in accordance with its calorific value. A part of the radiated infrared are irradiated to a progagating passage of a surface acoustic wave of a piezoelectric body substrate of an infrared detecting part 5. Here, a shutter (not shown in the figure) is arranged preliminarily in the front face of a photodetecting part of the detecting part 5 and the infrared rays made incident to the part 5 are intermitted by shutting and opening at a fixed cycle. The output signal of the part 5 is a digital quantity and this output signal is processed directly by a control circuit 10 consisting essentially of a microcomputer. |
