Linear temperature sensing element with window on insulating layer

Abstract

A linetyped temperature perceptive component with windows mounted on the insulating layer is disclosed. It includes an oversheath, two detecting conductors and a insulating layer; two detecting conductors are mounted parallel in the inner oversheath by twisted type, and at least one of them is memory alloy thread; the insulating layer coats the outer periphery of arbitrary one of two detecting conductors, one or several spaced windows are formed on the twisted extruded surface between two detecting conductors. The linetyped temperature perceptive component with windows mounted on the insulating layer is heated to make the detecting conductor made of the memory alloy thread extend from the window according the characteristic, and contact with the detecting conductor mounted parallel to generate short circuit to reach the target of alarm. Because the wolliness of memory alloy thread is good, it's convenient to install, and it has high corrosion resistance, so the production has high reliability.

Description

technical field [0001] The invention relates to a linear temperature sensing element used in a linear temperature sensing detector, in particular to a linear temperature sensing element with a window on an insulating layer. Background technique [0002] The linear temperature sensing detector is a widely used fire detector, mainly composed of a linear temperature sensing element (also known as a detection cable) and a conversion box connected to one end of the linear temperature sensing element, and according to the According to the different structure, it is divided into two types: recoverable and non-recoverable. figure 1 and figure 2 They are the vertical partial structure and transverse cross-sectional view of the linear temperature sensing element in the traditional non-recoverable linear temperature sensor respectively. Such as figure 1 , figure 2 As shown, this traditional wire-type temperature sensing element includes an outer sheath 1; two detection conductors...

AI Technical Summary

Problems solved by technology

But one of the disadvantages is that the detection conductor in this linear temperature sensing element has no change in its elasticity under normal conditions or in the alarm temperature environment, and is relatively hard and brittle, so it cannot withstand excessive pressure during installation and use. The mechanical external force, so the construction is difficult; the second disadvantage is that the detection conductor in this linear temperature sensing element is easy to rust, which will increase the resistance value of itself and the connection point, thereby greatly reducing the reliability of the alarm

Images