| 摘要 |
A cooking utensil has an outer shell (11), an inner shell (12) disposed inside the outer shell forming a cylindrical wall space (16) between the outer and inner shells. The wall apace (16) is formed betwen the outer and inner shells substantially along the highest of the inner shell (12). The cooking utensil also has a first heat conductive plate (14) being in contact with an inner bottom surface of the outer shell (11) and an outer bottom surface of the inner shell (12) to allow even distribution of heat throughout the bottom surface of the inner shell. A second heat conduction plate (15) is affixed to and in contact with an outer bottom surface of the outer shell. The wall space (16) between the outer and inner shells contains ambiant air. Alternatively, the wall space defined by the outer and inner shells contains a heat conduction medium (206), such as silicon oil. A support cover (13) is configured to fit in surrounding relation to the second heat conduction plate. The cooking utensil is equipped with an inner lid (20) that fits over a flange of the inner shell and covers an opening defined by the inner shell. A cover (30) that fits over a flange of the inner shell and the lid substantially covers an opening defined by the inner shell. The cover and the lid define an air gap space therebetween for trapping heat.
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