Besides the abovementioned drying equipment, the drying modes combining solar energy with other energy appear. Tiwari GN and other researchers use hot water heat collector to dry grains [5]. El-Sebaii AA has designed one natural convection dryer with the heat storage unit which adopts phase change material for heat storage so as to reduce the weather’s influence on its work [6]. Ivanova D has designed one dryer [7] combining terrestrial heat, waste water and solar energy to dry fruits and vegetables. Whether in daytime or in night, 68ć terrestrial heat resource can guarantee the drying medium reaches 68ćso as to ensure the drying operation. Solar energy and heat pipe technology are always valued by researchers. Ceylan I has researched one solar auxiliary heat pipe dryer[8], and analyzes and evaluates the performance of dryer through the experiment of drying herbal medicine under different environment.