| 摘要 |
PURPOSE:To obtain a correct control under a high temperature by a method wherein the relative humidity and temperature of air containing steam generated from food are measured, and an absolute humidity is obtained on the base of the measurement result, thereby controlling the operation of a heating means. CONSTITUTION:The humidity sensor 9 for detecting the relative humidity of air which contains the steam generated by heating the food 4 and the temperature sensor 10 for detecting the temperature of the air are located at an exhaust port 5. The outputs of the sensors 9 and 10 are inputted into a microcomputer 16 respectively through an amplifying circuit 12, 14 and an A/D converter 13, 15. The microcomputer 16 decides a saturated moisture amount in an unambiguous manner based on the temperature information of the temperature sensor 10, and then multiplies thus obtained value with the relative humidity information from the humidity sensor 9 to decide the absolute humidity. Further, the microcomputer 16 calculates change in the absolute humidity which rises due to the steam generated by the heating of the food and controls a driving circuit 8 of the heating means 2 on the base of the calculated value. |
