| 摘要 |
<p>In electric blanket material, the heating wire surface area is considerably smaller than the surface area of the fabric. Therefore, in most cases, the generated watt density at the conductor surface is higher than the rated value for the blanket, which is equal to the input power divided by the area of fabric. This leads to singeing damage and possibly fire. This heating fabric overcomes the risk of heat damage by utilising parallel connected heating wires (1) connected via current wires (2) in both selvedges. The heating wires are woven in strips or zones maintained at a predetermined distance from one another by woven yarns. The safe distance for the wires to be separated by is mathematically derived to be pi/2 or 1.57 times the wire diameter.</p> |
