Cooking fume preventing device for inlet of baking oven of foaming furnace

A cooking fume preventing device for an inlet of a foaming furnace drying oven comprises two sets of exhaust hood sets, a U-shaped condensation pipe, a cooling water tank, an oil collecting tank and an exhaust fan, the inlet of the foaming furnace drying oven is formed in a front side plate of the foaming furnace drying oven, the two sets of exhaust hood sets cover the upper portion and the lower portion of the inlet of the foaming furnace drying oven respectively, and most of the U-shaped condensation pipe is immersed in cold water in the cooling water tank. The two ends of the U-shaped condensation pipe vertically extend out of the cooling water tank, the air outlet ends of the two sets of exhaust hood sets are connected with the air inlet end of the U-shaped condensation pipe, the air outlet end of the U-shaped condensation pipe is connected with the suction end of the exhaust fan, and the oil collecting tank is arranged below the cooling water tank. An oil recovery pipe is connected between the lower port