Patent ID: 7915568

Claim:
A multifunction microwave oven with superheated steam, comprising a casing, a cooking chamber for accommodating food to be cooked, a microwave generating assembly for generating microwave for cooking food, a steam generating assembly, a steam heating assembly and a control circuit; wherein the steam generating assembly for generating ordinary steam of approximately 100° C. is located at the bottom or beside of the casing; said steam generating assembly includes a water tank, a water pump, water pipes, a boiler and an ordinary steam pipe, and wherein the water tank is located at the bottom or beside of the cooking chamber, and the boiler incorporates a heating means and a water level sensing means; wherein the steam heating assembly for generating superheated steam up to 400° C. is located at the top or beside of the cooking chamber; said steam heating assembly includes a convection heating cavity incorporating a centrifugal impeller and its driving means, and a heating means; wherein the ordinary steam pipe is connected with the convection heating cavity, and the ordinary steam from the boiler enters the convection heating cavity through this ordinary steam pipe; upper gas outlets and upper gas suction ports are disposed at a bottom panel of the convection heating cavity; and wherein the upper gas suction ports include plurality of through holes distributed within an inner circular region at the bottom panel of the convection heating cavity, and the upper gas outlets include plurality of through holes distributed within an outer circular ring at the bottom panel of the convection heating cavity, so that the superheated steam passes through the upper gas outlets of the convection heating cavity and blows outwardly and downwardly into the cooking chamber, while the backflowing gas is sucked from the central area of the cooking chamber and enters the convection heating cavity through the upper gas suction ports.