To dry lumbers within a short period of time without generating any warping, discoloration and the like by a method wherein a drying chamber, shielded from an outside atmosphere and receiving lumbers therein, and a heat radiation type heating means, keeping a temperature in the drying chamber at a desired temperature, are provided.
A drying chamber 18 is provided with a heat radiation type heating device 20. The heating device 20 heats at night by using an electric heater provided therein and radiate the heat, stored in a heat storage block, continuously in daytime and at night. A device main body is provided with a temperature sensor and a temperature in the drying chamber 18 can be kept at a preset temperature while detecting the temperature by the temperature sensor. Further, the heating device 20 is provided with a heater for reheating and when the calorific power of the heat storage block is consumed excessively, the reheating heater heats the heat storage block whereby the inside of the drying chamber 18 can be kept at the set temperature at all times.
OGINO YASUO
MORITA YUKIO
MORITA KOMUTEN KK