Cooling device of toughening furnace for toughened glass

The utility model relates to the technical field of toughening furnaces and discloses a cooling device of a toughening furnace for toughened glass, the cooling device comprises a rack, a conveying roller arranged on the rack and a cooling air knife arranged on the rack, the cooling air knife is provided with a cooling air duct and a cooling channel, the cooling air duct is provided with an air outlet opposite to the conveying roller, and the conveying roller is provided with an air outlet opposite to the cooling channel. Cooling liquid flows in the cooling channel so as to cool air in the cooling air channel. By arranging the rack, the conveying roller and the cooling air knife, the conveying roller rotates to convey glass, the cooling air knife is provided with the cooling air duct and the cooling channel, cooling liquid flows in the cooling channel to cool air in the cooling air duct, and then the temperature of the air flowing out of the air outlet is reduced; the air outlets are opposite to the conveying