Constant-temperature instant-heating type steam generating device for cooking

The utility model discloses a cooking constant temperature instant heating type steam generating device which comprises a machine frame, a fuel oil burner is arranged inside the machine frame, a heat preservation steam generating box is arranged above the fuel oil burner, and a smoke exhaust port is arranged above the heat preservation steam generating box. A water inlet is formed in the bottom of the heat preservation steam generation box, and a water inlet electric valve is arranged on the water inlet; a steam outlet is formed in the top of the heat preservation steam generation box, and a temperature sensor is arranged on the steam outlet. A hearth connected with a fuel oil burner is arranged on the lower portion in the heat preservation steam generation box, a plurality of inner and outer finned tubes longitudinally and evenly arranged in the heat preservation steam generation box are arranged above the hearth, the bottoms of the inner and outer finned tubes are communicated with the hearth, and the tops