| 摘要 |
PROBLEM TO BE SOLVED: To perform an efficient diffusion of air and moisture left in a furnace inner space out of a furnace due to a presence of furnace wall refractory without changing temperature and flow rate of atmosphere gas.SOLUTION: A purge device 1 comprises a plurality of atmosphere gas feeding ports 2 for feeding atmosphere gas from the outer-most surface of a furnace inner space side of a furnace wall refractory 4 forming a furnace wall W of an atmosphere heat treatment furnace toward a furnace inner space A, and the number of the atmosphere gas feeding ports 2 per unit volume of the furnace inner space A is one piece/mor more. It is preferable that the atmosphere gas feeding ports 2 feed atmosphere gas toward a plurality of directions slanted with respect to the furnace wall W. In addition, it is also preferable that the atmosphere gas feeding ports 2 adjacent to each other in a direction perpendicular to an advancing direction S of a material to be treated are arranged on separate planes perpendicular to the advancing direction S of the material to be treated in the furnace inner space A. |
