Line-type heat sensing fire detector with terminal capacitor

A fire detector and line-type technology, which is applied in electric fire alarms, thermometers and instruments with direct heat-sensitive electric/magnetic elements, can solve the problem of infeasible and impossible to monitor line-type temperature-sensitive fire detection To solve problems such as open circuit or open circuit fault, achieve normal and reliable alarm, eliminate the problem of increasing measurement difficulty, and solve the problem of inability to judge open circuit fault

Active Publication Date: 2009-08-26
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned traditional linear temperature-sensitive fire detector has the following problems: the described conversion box 2 cannot monitor the open circuit or open circuit fault of the linear temperature-sensitive fire detector
The detector judges whether there is an open-circuit fault by measuring the continuity of the

Method used

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  • Line-type heat sensing fire detector with terminal capacitor
  • Line-type heat sensing fire detector with terminal capacitor
  • Line-type heat sensing fire detector with terminal capacitor

Examples

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Embodiment 1

[0022] Such as image 3 As shown, the linear temperature-sensing fire detector with terminal capacitance provided in this embodiment includes a linear temperature sensing element 1; one end of the linear temperature sensing element 1 is connected, and a resistance monitoring unit 7 is arranged inside, so that it can detect in real time The resistance value of the whole loop can be processed at the same time, and the conversion box 22 that outputs the alarm signal when the alarm parameter of the whole loop exceeds the alarm threshold; and the terminal capacitor 16 connected to the other end of the line-type temperature sensing element 1; wherein the line-type temperature Sensing element 1 comprises two detection conductors 3,4 and the NTC characteristic barrier layer 5 that is arranged in parallel between two detection conductors 3,4; Described conversion box 22 also comprises a can work alternately with resistance monitoring unit 7 Capacitance monitoring unit 8.

[0023] In t...

Embodiment 2

[0033] Such as Figure 5 As shown, the linear temperature-sensing fire detector with terminal capacitance provided in this embodiment includes a linear temperature sensing element 1; one end of the linear temperature sensing element 1 is connected, and a voltage monitoring unit 10 is arranged inside, so that it can detect in real time The voltage value of the entire loop can be processed at the same time, and the conversion box 23 that outputs the alarm signal when the alarm parameter of the entire loop exceeds the alarm threshold; and the terminal capacitor 16 connected to the other end of the linear temperature sensing element 1; wherein the linear temperature Sensing element 1 comprises two detection conductors 3,4 and the NTC characteristic barrier layer 5 that is arranged in parallel between two detection conductors 3,4, and one of two detection conductors 3,4 is a thermocouple wire; The conversion box 23 also includes a capacitance monitoring unit 8 capable of working al...

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Abstract

A line-type heat sensing fire detector with a terminal capacitor comprises a line-type temperature sensor element as well as a converter box and a terminal capacitor respectively connected with the two ends of the line-type temperature sensor element; wherein the line-type temperature sensor element comprises two detecting conductors and an NTC property barrier layer parallelly arranged between the two detecting conductors; and the converter box comprises a capacitance monitor unit. The line-type heat sensing fire detector with the terminal capacitor provided by the invention not only can eliminate the increased difficulty of measurement of the fire detector in the prior art caused by the terminal resistance, but also can use the capacitance measurement unit and a voltage monitor unit or a resistance monitor unit to alternatively monitor the line-type temperature sensor element, thus resolving the problem that the open circuit fault can not be judged caused by that the terminal resistance is replaced by the terminal capacitor, therefore the fire detector can be ensured to alarm normally and reliably.

Description

technical field [0001] The invention belongs to the technical field of fire protection, in particular to a linear temperature-sensitive fire detector. Background technique [0002] Linear temperature-sensitive fire detectors are widely used fire detectors, among which parallel NTC linear temperature-sensitive fire detectors are currently commonly used. figure 1 It is a structural schematic diagram of a traditional parallel NTC linear temperature-sensitive fire detector. Such as figure 1 As shown, this parallel NTC type linear temperature-sensing fire detector includes a linear temperature sensing element 1 and one end connected to the linear temperature sensing element 1, and a resistance monitoring unit 7 is installed inside, so it can detect the resistance value of the entire loop in real time , can carry out data processing at the same time, and output the conversion box 2 of alarm signal when the alarm parameter of the whole circuit exceeds the alarm threshold; wherein...

Claims

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Application Information

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IPC IPC(8): G08B17/06G01K7/02
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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