Working principle of “Double-layer spiral temperature sensing wire”
There are many kinds of heating wires common in the market, but only two are suitable for the use of electric blankets, one is the far-infrared carbon fiber heating wire, the other is the double helix heating wire, in fact, the double helix heating wire temperature line has a long history, many people have been using, but most people do not know its working principle, (XingGuang Electric Heating Products Co., Ltd. answer the following problems to you )
Single-layer spiral heating wire only heating function, when the heating wire cross, overlap and other abnormal work, the heat doubled to cause local overheating, if not controlled, when the temperature increases to the ignition point, the electric blanket will cause a fire. The use of double-layer wire, between the two layers for the fusible, the fusible melting point is less than the ignition point, when the electric blanket temperature rises to the fusible melting point temperature, the fusible melt, so that the two layers of electric wire connected, and the signal feedback to the switch, and cut off the power supply, prevent the electric blanket due to improper use of the fire .
