| 摘要 |
<p>Heating apparatus includes a generally circular tray (1), having a layer (2) of insulative material disposed therewithin. The tray (1) supports, above the layer (2) each end of a number of tungsten-halogen lamps (5) and the tray (1) is urged upwardly towards the undersurface of a layer (11) of glass ceramic to form a cooking hob. A coating (12) or an infra-red reflective material, typically an oxide material, such as titanium dioxide, may be deposited on the layer (2) of insulative material so as to cause the layer (2) to be substantially impervious to infra-red radiation. As an alternative to the coating (12), the layer (2) may be surface-enriched with an infra-red reflective material.</p> |
