| 摘要 |
PURPOSE:To provide the titled apparatus capable of cooling rapidly the inside of a furnace with high cooling efficiency by circulating forcibly a cooling gas with a fan provided in the furnace, and arranging an inner cooler and an outer cooler in front and in the rear of the fan to cool the cooling gas. CONSTITUTION:A heating chamber R is formed by a heat-insulating wall 13 and doors 15 and 16 in the main body 11 of a gas-cooled vacuum furnace having a furnacd lid 12. An article A is placed in the furnace, and heated with a heater 14. Then said doors 15 and 16 are opened, a fan 18 of the gas-cooling apparatus is operated by a motor 17, and the cooling gas is circulated in the furnace to cool rapidly the inside of the furnace. The cooling gas, blown by said fan 18 and heated by the Joule heat of the fan, is cooled by an outer cooler 20, then passed through the outside of a baffle 2 and the heat-insulating wall 13, passed through the inside of the heating chamber R in the direction as shown by the arrow, cooled by an inner cooler 19, and sucked by the fan 18. Consequently, the whole region of a cooling cycle in the furnace can be cooled rapidly with high cooling efficiency. |
