Integral gas combustion device

The utility model discloses a combustion device, which comprises an air inlet section, a fuel gas/air mixing section, and a combustion section. The air inlet section is composed of a vertical multi-stage centrifugal axial fan motor, an air funnel, fan impellers and a fan shell. The fuel gas/air mixing section is arranged above the axial fan motor, a swirl composite chamber and a passage cavity are arranged in this section, a swirl guide sheet is arranged at the passage port, an annular fuel gas collecting chamber is arranged in the swirl composite chamber and communicated with a fuel gas inlet, holes are formed on the wall of the fuel gas collecting chamber for diffuse-ejecting gas into the cavity, and the passage cavity above the fuel gas collecting chamber is provided with stirring fan blades. The combustion section is provided with a combustor mixed gas sandwich cavity having gas ejection holes on its inner wall, the inner cavity of a combustion cup constitutes a combustion chamber, and an electric igniter is arranged at bottom of the combustion cup. The combustion device provided by the utility model has three-section compact structure, strong integrity, uniform mixing of fuel gas and air, sufficient combustion, small loss, high flame temperature, high safety, low noise, and suitability for usage in combination with furnace and stove.