The principle of glass cooling is that the glass heated to a certain temperature enters the grate from the tempering furnace, and the cooling air ejected from the grate nozzle is in close contact with the glass surface, and the heat on the glass surface is transmitted into the cooling air.

　　So that the glass temperature decreases and the cooling air temperature increases, and then the cooling air that increases the temperature diffuses to the periphery along the glass surface, and spreads out through the gap between the small bellows of the grate of the tempering furnace and the space around the grille.

　　Take away the heat from the glass to reduce the temperature of the glass;

　　The air grid nozzle continuously ejects cooling air to the glass surface, and the glass temperature continues to drop until the set time.