Patent ID: 8687339
Filing Date: 2014-04-01
Classification: H01H,H05B

Abstract:
1. A safety control structure for heater wire, comprising: a heater wire which includes a first heating wire, a second heating wire, an insulation and fusible layer interposed between said first heating wire and said second heating wire, as well as a coating layer which covers said second heating wire and said insulation and fusible layer, wherein, said first heating wire and said second heating wire each includes a first end and a second end; the first ends of the first and the second heating wire are at one end of the heater wire, while the second ends of the first and the second heating wire are at another end of the heater wire; said first end of said first heating wire is coupled to said second end of said second heating wire; a switch with one end coupled to said second end of said first heating wire and with another end coupled to a pole of a power, and said switch being triggered by a trigger circuit to either show turned on or interrupted status; and an over current protection element, with one end coupled to said first end of said second heating wire and with another end coupled to an opposite pole of said power, by which said insulation and fusible layer is fused when said first heating wire and said second heating wire produce exceptionally high temperatures, and the current is increased instantaneously when said first heating wire and said second heating wire are short-circuited, so that the circuit is interrupted by said over-current protection element to show interrupted status, wherein the resistance of said first heating wire is substantially equal to the resistance of said second heating wire, and wherein when said first heating wire and said second heating wire are short-circuited the current increased to substantially 2 times an original current value.