Patent ID: 7914595

Claim:
A fume removal method for a reflow furnace comprising sucking a gas which contains fumes at a temperature of at least the liquefication temperature of the fumes from the vicinity of a heater installed in a reflow furnace, introducing the gas into a filter having a large number of elongated holes arranged side by side while maintaining the gas at a temperature of at least the liquefication temperature of the fumes, cooling the fumes to condense the fumes on the walls of the elongated holes and distribute the gas over a wide range by the large number of elongated holes, introducing the distributed gas into a labyrinth filter having a large number of upwardly-extending and downwardly-extending plates disposed in a staggered arrangement, contacting the gas with the plates to cool the fumes and condense the fumes on the plates to remove the fumes from the gas, and then returning the gas from which fumes were removed to inside the furnace.