Automatic controlling steam generator

The utility model relates to an automatic controlling steam generating device, which comprises an external cylinder body and an internal cylinder body. A water flow inner cavity is arranged between the two cylinder bodies. Moreover, the two cylinder bodies have the same circular top and tapered bottom parts, and the centers of the cylinder bodies are respectively provided wit a fuel inlet and a steam outlet, wherein, a fuel inlet nozzle and an ignition assembly are arranged under the fuel inlet, and a mixer is arranged above the fuel inlet. The internal cylinder body is provided with multiply layers of water inlet nozzles from top to bottom along the circumferential cross section, wherein, the water inlet nozzles form angles ranging from 20 DEG to 80 DEG with the wall of the internal cylinder body, and each layer of nozzles is provided with nozzles of which the number is from 4 to 60. Automatic control is performed by associated computers. The device has the advantages of small size, light weight, simple operation, high thermal efficiency, low maintenance cost, strong fuel applicability and automatic control, and the thermal efficiency is more than 90%. The utility model can be widely used in fields such as heating, steam, hot water, refrigeration, drying, chemical reaction, oil extraction in oil fields, etc.