What is the use of the air door in the flue-cured tobacco room? What is the use of the skylight in the flue-cured tobacco room?

The air door of curing barn refers to the tunnel door used for air intake, which is divided into two types: cold wind tunnel and hot wind tunnel. Traditional curing barn generally adopts cold air tunnel, that is, two square openings of 10 cm × 10 cm are evenly opened at the bottom of the wall around the curing barn to send air into the curing barn. The air intake is controlled according to the size of the opening (generally covered tightly with straw bundles or adobe, and excessive air intake is controlled when used).

At first, the specifications of the skylight were very small. Some use a small laundry basket to remove the bottom and put it on the baking roof, and then cover it with a rain cover, which is stuffed with straw bundles, which is very inconvenient to operate. Later, it evolved into a wooden flap cover (but the structure can be pulled to the ground with a rope and controlled by people, so it is difficult to describe it, so it is omitted), that is, to exclude the humidity in the curing barn, it is a hole and a skylight.

With the development of science and technology, the cave of heaven and earth has been improved rapidly, with a long skylight (that is, riding on the roof at the top of the curing barn to open a 2-meter-long hole, and then making a small house like two floors, divided into two boards to control the cover), which increases the area of the wet outlet; The underground hole has also been improved to walk under the fire dragon of the owner of the baking room, and the incoming cold air will rise to the place where there are tobacco leaves in the baking room after preheating, which can reduce the number of hanging tobacco leaves. Then it was improved to combine hot air with cold air duct, which solved the problem that humidity inside and outside the curing barn could not be exhausted due to high humidity in rainy season. Just answer, I'm afraid there is a problem, understand!