| 摘要 |
A paint drying oven for baking a paint film of a painted article for drying following a painting process. In a conventional device, an indirect heating system is used so as to avoid the generation of a reaction product affecting the paint film quality, this resulting in a great thermal loss, and therefore higher device cost and larger installation space. A combustion type heating device (19b, 19c) is provided in which in-oven heating means (Hb, Hc) are installed at the portions of fresh air paths (18b, 18c) usptream of connecting points between in-oven air circulation paths (9b, 9c) and the fresh air paths (18b, 18c) and which heats circulating fresh air (OA). This combustion type heating device (19b, 19c) is of a direct heating type in which fuel is burned directly in the atmosphere of the circulating fresh air (OA) which is to be heated, and therefore the above problems inherent in the prior art can be solved. <IMAGE> |
