The bottom of the steamboat is inverted funnel shape, when using the steamboat, the pot must be put under the pot of steaming water pot, in which the steam rises to the steamboat through the funnel holes, which can make the food more tender.

Steamer by the arrangement of the boiler chamber around the water-cooled wall tubes, constant horizontal upper and lower cylinder and connecting devices of the convection tube bundles constitute, play the role of heat exchanger. The high temperature flame and flue gas produced by combustion heat the water in the boiler through the hot surface of the boiler, and then gasification to produce steam with a certain pressure and temperature. Steam boiler is actually a boiler steam generator, is part of the boiler body composition.