| 摘要 |
<p>A radiant electric heater (1) includes a heating element (4) has at least one covering sheet 7 in the form of a fabric comprising glass filaments, ceramic filaments or metal filaments spaced from the element. Metal filaments, such as of a high temperature withstanding alloy, may be woven and glass filaments, or ceramic filaments such as of alumino-silicate material, alumino-boro-silicate material or zirconia, may be of woven, knitted or mat form. An apertured member (10) may be provided in contact with, or adjacent, to the covering sheet (7) of the fabric material.</p> |
