水文提出了一种简化的试验包模型，并探讨了快速仿真计算方法，提出根据不同情况用追赶法和反应系数法求解，开始相变点用焓来校正温度。通过实验测定冰箱箱内空气换热系数，并将测定的一个Ｍ包的温度变化曲线和计算曲线进行了比较，吻合较好，表明理论模型和算法比较准确，可供工程实用。 Hydrology proposed a simplified experimental package model, and discussed the rapid simulation calculation method, proposed according to different situations by catch-up method and response factor method to solve, start the phase change point with the enthalpy to correct the temperature. The heat transfer coefficient of air in the refrigerator was measured experimentally, and the temperature curve and calculation curve of a M-package measured were compared and agreed well, which showed that the theoretical model and algorithm were more accurate and could be used in engineering practice.