Experimental Study on the Development of Food Drying Machine for Home Use Using Low Electricity

Abstract

This study has been analyzed and investigated the possibility for the substitution of a heat source with the application of PTC(Positive Temperature Coefficient Heater) in a food drying machine.And this experiment was conducted to measure temperatures at the upper part of the vessel and the heat sink. And the structure has the many holes plane connected with the external air in the upper part of similar volumetric vessel, and attached to the PTC heater (3sets) of total consumption electricity of 120 [W] in Al radiant heat structure and the small fan (2sets) in the suitable space of the lower part.Consequently, it was found that at the most conditions of food drying test with the seven holes (5mm) under the control temperature 62℃, the optimum drying condition formatted and the optimum time range especially appeared from 6,500 second to 7,000 second in case of drying test on banana sample.