US Patent 9841182 Steam generator and heating cooker comprising steam generator

A steam generator comprises a water storage chamber which stores water, a steam generating heater which heats water in the water storage chamber, a water supply pump which supplies water stored in a water supply tank through a water supply port provided in the water storage chamber and a water supply passage, a discharge passage which discharges water formed with a first water discharge passage having a U shape to be convex downward, which is in fluid communication with a discharge port provided in the water storage chamber, and a second water discharge passage having an inverted U shape to be convex upward, and configured such that water stored in the water storage chamber is discharged through the discharge port and the water discharge passage according to the theory of a siphon, wherein the first water discharge passage is formed by a nonmetallic material.