A new top-fired hot air furnace is provided. A mixing chamber 1, a combustion chamber 2, and a heat storage chamber 3 are provided, a furnace port guide device 16 is provided between the combustion chamber and the mixing chamber, and the wall body has a conical top wall and a lower columnar hollow. The air inlet 7 is provided outside the columnar hollow wall, and an air circulation path 9 communicating with the air inlet is formed between the outer air outer ring wall and the inner air nozzle wall. A plurality of air nozzles 8 are provided in the air flow path, a gas inlet 4 is provided outside the conical top wall, and the gas outside the outer layer of the conical top wall is outside the gas. A gas circulation path 5 communicating with the gas inlet is formed between the annular wall and the inner gas nozzle wall, a multi-layer gas flow path is provided in the gas nozzle wall, a plurality of gas nozzles 6 are provided in the gas flow path, By adjusting the level and air nozzle, the surrounding swirl flows up to the gas nozzle. With orientation movements can flow into the central swirl flow by changing the flow direction, air flow rate ejected from the gas nozzle is larger than the flow rate near the swirling flow air nozzles are formed by discharging the air. [Selection] Figure 1
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