Abstract: An automatic drying algorithm for air vented tumble dryer is introduced, there are two NTCs to detect the temperature of air inlet and air outlet, it can reduce the influence of ambient temperature on drying and improve the accuracy of software control. The drying curve of different load components was studied, and the corresponding relationship between temperature differential and drying time was obtained. The fitting function of the 3% moisture content is preset to the software, the results show that the control of the final moisture content of all the load is within 3%±1%, and indicates the correctness and accuracy of the algorithm. This method can also be applied to different types of loads and other drying level.

Key words: Air vented tumble dryer, NTC, Drying clothes, Algorithm