| 摘要 |
An electrical heater (10) consists of a rigid panel (12) of high thermal conductivity material, within which are embedded one or more resistance wires (14) running parallel to a surface of the panel and electrically insulated from the panel. The panel provides a large surface area at a substantially uniform temperature from which heat is transferred to the environment. The tight fit of the wires within the panel ensures that in operation the temperature of the wires may exceed the panel temperature by as little as about 25 K. One surface may have a high emissivity (eg painted block) and the other a low emissivity. <IMAGE> |
