| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot air circulation furnace capable of continuously processing a large amount of treated matter despite its small size, allowing uniform heating, and capable of forming a heated zone and a soaking zone with hot air of the same temperature. SOLUTION: This hot air circulation furnace comprises a furnace body 1 having a heat source 5 and a rotary furnace bed 2, a work placing stand 23 having a work placing rack 24 installed on the rotary furnace floor 2, allowing a work to be placed thereon so as to be radially carried in and out, and allowing a circulation flow to be vertically passed therethrough, an axial flow fan 11 installed near the ceiling 4 of the furnace body 1 and forming the circulation flow in the entire part of the furnace body radially from the inside the outside of the furnace body 1, and annular partitions 8 dividing the inside of the furnace into an outer peripheral side area 6 in which the work placing table 23 is installed and an inner area on the inside of the outer peripheral side area and forming passages 9 and 10 in which the circulation flow is reversed near the furnace floor 2 of the furnace body 1 and near the ceiling 4. More desirably, zone separating partitions 12 in which a part of the air velocity of hot gas discharged from the axial flow fan 11 by narrowing an outlet side openingθ2 less than an inlet side openingθ1 and supplying the hot gas to the work placing table 23 are installed on the inside of the annular partitions 8. COPYRIGHT: (C)2004,JPO&NCIPI
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