| 摘要 |
PROBLEM TO BE SOLVED: To obtain emissivity of a heated material at a low cost and to provide an induction cooker, capable of detecting stain on the light-receiving part of an infrared sensor and noticing the stain. SOLUTION: The induction cooker comprises the infrared sensor for detecting infrared rays radiated from a heated material, a heat sensitive element thermally in contact with the heated material, an estimating means for estimating the emissivity of the infrared rays radiated from the heated material, based on the quantity of infrared rays detected by the infrared sensor and the temperature detected by the heat sensitive element, and a radiation temperature calculating means for calculating the radiation temperature of the heated material, based on the emissivity of the heated material estimated by the estimating means and the quantity of infrared rays detected by the infrared ray sensor. |
