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Non-recoverable linear temperature sensing detector breaking alarming method

A technology of temperature sensing detector and open circuit alarm, applied in the direction of electric fire alarms, thermometers and instruments using electric/magnetic components directly sensitive to heat, etc., can solve the problem of poor reliability, false alarm, and inability to issue open circuit faults It can improve the reliability of fire alarm and prevent false alarm problems.

Active Publication Date: 2009-05-27
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disconnection alarm method of this non-recoverable linear temperature sensing detector has the following problems: once the linear temperature sensing element is installed and used, once it is subjected to excessive mechanical tension, the detection conductor 1 will be disconnected failure, but at this time the conversion box 4 can not send out the open circuit fault alarm signal, but can only send out the open circuit fire alarm signal, which will cause false alarms, so the reliability is poor

Method used

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  • Non-recoverable linear temperature sensing detector breaking alarming method
  • Non-recoverable linear temperature sensing detector breaking alarming method

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Embodiment 1

[0013] Such as figure 2 As shown, the non-recoverable linear temperature sensor provided by the present invention includes a linear temperature sensing element and a terminal resistor 16 and a conversion box 18 connected to both ends of the linear temperature sensing element respectively; wherein the linear temperature sensing element consists of two parallel The set detection conductors 10, 11 and the NTC characteristic barrier layer 15 arranged in parallel between the detection conductors 10, 11 are composed; the detection conductors 10, 11 can be arranged in parallel, winding or coaxial manner. In addition, at least one of the detection conductors 10, 11 is a fusible conductor wire. The resistance value of the terminal resistor 16 ranges from 1KΩ to 20MΩ. The conversion box 18 always detects and stores the resistance value or the resistance value change rate between the detection conductors 10 , 11 . In addition, an outer sheath can also be arranged outside the linear te...

Embodiment 2

[0015] This embodiment is an improvement on the basis of Embodiment 1: one of the detection conductors 10, 11 is replaced by a thermocouple wire, so as to form a line with thermocouple characteristics with another detection conductor made of fusible conductor wire. type temperature sensing element, the conversion box 18 is used for real-time detection of the state of the line type temperature sensing element, the voltage (potential) value, and the magnitude of the rate of change of the voltage value, and other structures remain unchanged.

[0016] When the linear temperature-sensing element in the non-recoverable linear temperature-sensing detector provided by the present invention is heated and reaches a certain temperature, the temperature of the detection conductor made of fusible conductor wire in the linear temperature-sensing element at the heated part will be It rises thereupon, and when the temperature reaches its fusing temperature, it will begin to melt. Under the act...

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Abstract

This invention discloses one in-restorable linear temperature detector and its shortcut alarm method, which comprises linear temperature detect element and its switch case and terminal resistance on both ends of the detection parts, wherein, the linear temperature sensor element is composed of two pieces of detection conductors and NTC isolation layer in between with at least one conductor is easy to be fused wires. This invention provides the method can send different alarm signals according to the shortcut fault or break fire.

Description

technical field [0001] The invention relates to a circuit break alarm method for a linear temperature-sensitive detector, in particular to a circuit break alarm method for a non-recoverable linear temperature-sensitive detector. Background technique [0002] The linear temperature sensing detector is a widely used fire detector at present. It usually consists of a linear temperature sensing element and one end connected to the linear temperature sensing element. Value) for detection, and according to the size or change rate of the alarm electric parameter (or sampled value) of the conversion box that outputs the fire alarm signal, the other end of the line-type temperature sensing element can be open or connected to a sensor that can activate under normal conditions Terminal resistance for open circuit monitoring, and according to the structure of the linear temperature sensing element, it is divided into two types: recovery type and non-recovery type. figure 1 It is a sche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/06G01K7/00
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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