As the lower limit temperature of the lower limit pressure and that time is configurated

摘要

PROBLEM TO BE SOLVED: To provide a drying method of food materials weak in heat denaturation, and a simple drying device suitably used for the drying method, capable of performing efficient drying without denaturing the food materials weak in heat denaturation, and achieving desired moisture content.;SOLUTION: In this drying method of the food materials weak in heat denaturation, a lower limit pressure and a lower limit temperature at that time are determined, and an upper limit pressure and an upper limit temperature at that time are determined, in drying the food materials weak in heat denaturation under a reduced pressure in a state of placing the same in a drying chamber 11. The moisture of the food materials is evaporated by reducing a pressure in the drying chamber 11 to the lower limit pressure, to reach a saturation temperature under the lower limit pressure, and then low-temperature steam of 100°C or less is injected to heat the food materials to the upper limit temperature to reach the upper limit pressure. This operation is repeated, for example, some dozen times to lower the moisture content of the food materials, for example, to 20% or less.;COPYRIGHT: (C)2011,JPO&INPIT