| 摘要 |
A reflow furnace, wherein circular holes (21) are formed in a second horizontal plate (18a) forming the bottom surface of an atmospheric gas collecting box (18) at equal intervals between adjacent delivery pipes (20) and (20). A partition wall (2) positioned above a conveyor (5) is so formed that its upper portion is formed of a thermally insulating wall (2a) containing a thermally insulating material with a thickness T and its lower part is formed of a metal plate wall (2b) extending from the thermally insulating wall (2a) downward toward the conveyor (5). The pitch P2 of the delivery pipes (20) disposed on both sides of the metal plate wall (2b) is 12 mm which is substantially equal to the pitch P1 of the adjacent delivery pipes (20) and (20) disposed in compartments (R1) to (R5).
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