| 摘要 |
A drying furnace unit (10) equipped with: a furnace body (12); a transport passage (14); a pipe structure (20) having first and second ventilation holes (21a, 22a); a hot breeze generation device (26); an exhaust blower (28); and a breeze direction switching valve (30). The breeze direction switching valve (30) is formed with first and second valves (31, 32). By switching the first and second valves (31, 32) the hot breeze generated by the hot breeze generation device (26) can be switched between flowing from the first ventilation hole (21a) to the second ventilation hole (22a) and flowing from the second ventilation hole (22a) to the first ventilation hole (21a). |
