| 摘要 |
This invention relates to a paint drying furnace for baking and drying paint films on painted objects following a painting process. A conventional furnace discharges, from the system, combustion gas retaining a large amount of heat after a heat exchange in a combustion type furnace interior heating device with a gas circulating through a furnace interior circulating gas passage, and thus involves a great heat loss. In this invention, a shunt gas passage (21) is provided for dividing a gas (PA) outputted from inner gas passages (ip) of a radiator means (7), from a position of a radiator circulating gas passage (20) upstream of a connecting point of a fresh air passage (18a), and mixing this divided gas (PA") into the gas (RA) circulating through the furnace interior circulating gas passage (9a). With provision of this shunt gas passage (21), a combustion type radiator heating device (19a) acts also as furnace interior heating means (Ha). Thus, the above problem of the prior art is eliminated.
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