| 摘要 |
<p>A lightweight solid plate surface heating unit of low thermal mass with a top plate of thin composite material with a center core of high thermal conductivity and outer reinforcing layers. A coating of high electrical resistivity covers the bottom layer of the composite plate. A film heater of bifilar spiral pattern having its terminals near the center of the plate is bonded to the electrical resistivity coating. A terminal block is mounted to the underside of the plate for making electrical connection with the terminal sections of the film heater.</p> |
