Patent ID: 7760993

Claim:
A device for forming steam for household appliance, comprising: a spiral tube chamber, a heating unit comprising a heating element which is set on the outside of spiral tube chamber, a water intake which is on the inner end of the spiral tube chamber, and a steam outlet which is at the outer end of the spiral tube chamber, wherein the spiral tube chamber is on the heating unit, wherein the heating element is an electric heating element, which is buried in the body of the heating unit, and constitutes the heating facility, and wherein the heating unit comprises: a main body, a cover plate set on the top of the main body of the heating unit, two spiral grooves, which are respectively set on the opposite face of the cover plate and the main body of the heating unit, forming the spiral tube chamber, the electric heating element being buried in the main body of the heating unit, a water intake on the upper surface of the cover plate facing the inner end of the spiral groove, and a steam outlet on the upper surface of the cover plate facing to the outer end of the spiral groove.