Abstract: In this paper, the variation coefficient was introduced to quantify the uniformity of temperature distribution in the cooking process of IH rice cooker. The influence of the distribution position of the excitation coil on the temperature distribution is studied. The results show that the variation coefficient of temperature in the pot increases with time and decreases with the overall trend, and the maximum is 0.18 in the middle of the heating stage, which is the lowest temperature uniformity in this phase. The coefficient of variation is related to the position of the excitation coil. The coefficient of variation is at a lower value as a whole when d = 30 mm at the bottom of the coil in this experiment. Namely, the temperature distribution is relatively uniform of the whole cooking process under such conditions in the pot.

Key words: Variation coefficient, IH rice cooker, Excitation coil, Temperature distribution