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A linear temperature susceptibility fire detector with electronic switch component

A technology of fire detectors and electronic switches, which is applied to fire alarms with electric effects, electric switches, thermometers with electric/magnetic elements that are directly sensitive to heat, etc., and can solve the problems of reducing the reliability and sensitivity of detector alarms , to achieve the effect of eliminating low alarm reliability and sensitivity

Active Publication Date: 2008-02-13
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, there is following problem in this prior art line-type temperature-sensing fire detector with NTC characteristic: Although the conversion box 5 can send a fault alarm signal when the line-type temperature sensing element is disconnected or the terminal resistance 4 falls off, but the online In the case of an open circuit of the linear temperature sensing element, once a fire occurs, the detector will still determine whether to send a fire alarm signal according to whether the sampling value of the linear temperature sensing element exceeds the original alarm threshold set in the case of non-open circuit. There will be a situation where the heating temperature of the linear temperature sensing element exceeds the alarm temperature before the fire alarm is issued, which greatly reduces the alarm reliability and sensitivity of the detector

Method used

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  • A linear temperature susceptibility fire detector with electronic switch component

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Embodiment 1

[0018] As shown in Figure 3, the linear temperature-sensing fire detector with electronic switch assembly provided by the present invention includes a linear temperature sensing element, one end connected to the linear temperature sensing element, and can monitor the temperature or temperature of the linear temperature sensing element in real time. The switch box 5 that alarm electric parameter (or sampling value) is detected and the electronic switch assembly 8 that is connected to the other end of the linear temperature sensing element; The NTC characteristic barrier layer 3 between the detection conductors 1 and 2, and the electronic switch assembly 8 is connected in series between the two detection conductors 1 and 2 at the other end of the linear temperature sensing element. It works as follows:

[0019] ① The switching box 5 alternately controls the opening and closing of the electronic switch assembly 8, that is, the output contacts of the electronic switch assembly 8 a...

Embodiment 2

[0023] As shown in Figure 4, the linear temperature-sensitive fire detector with electronic switch assembly provided by this embodiment includes a linear temperature sensing element, an end connected to the linear temperature sensing element, and can monitor the temperature of the linear temperature sensing element in real time. Or the conversion box 5 that alarm electric parameter (or sampling value) detects and the electronic switch assembly 8 that is connected to the other end of the linear temperature sensing element; The NTC characteristic barrier layer 3 and the meltable insulating layer 7 are between the detection conductors 1 and 2, and at least one of the detection conductors 1 and 2 is an elastic conductor or memory alloy wire. The linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment is the same as the previous embodiment except that the structure of the linear temperature sensing element is different from the previous e...

Embodiment 3

[0025] In this embodiment, one of the detection conductors 1 and 2 on the linear temperature sensing element in Embodiment 1 and Embodiment 2 is made of a thermocouple wire material, and forms a temporary thermocouple with the other, thereby forming a thermocouple The characteristic linear temperature sensing element, while other structures and working principles are the same as the above two embodiments.

[0026] Described electronic switch assembly 8 can be the following several modes, but not limited to this:

[0027] 1) Relay type switch assembly, the opening and closing control mode of the relay can be wireless control mode or wired control mode;

[0028] 2) Diode-type switch components, the opening and closing control mode of the diode can be controlled by the polarity conversion of the power supply added to both ends of the diode;

[0029] 3) Zener diode type switch assembly, the opening and closing control mode of the Zener diode can be controlled by the power supply ...

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Abstract

The invention discloses a line-type temperature-sensitive fire detector with an electronic switch component, and the detector comprises a line-type temperature sensing element, a converting box connected with one end of the line-type temperature sensing element and used for real-time detecting temperature of the line-type temperature sensing element or the alarm electric parameters (or sampling values) and an electronic switch component connected with the other end of the line-type temperature sensing element. The line-type temperature-sensitive fire detector with the electronic switch component can detect whether open circuit occurs in the line-type temperature sensing element through using the electronic switch component, and determines whether to give out a fire alarm signal through identifying whether the electric parameter (or sampling value) detected by the converting box exceeds the alarm threshold when the electric switch component is open. Such design not only enables detecting and determining status of the line-type temperature sensing element at any time, but also eliminates the problems of low alarm reliability and low sensitivity in case of open circuit.

Description

technical field [0001] The invention relates to a linear temperature-sensitive fire detector, in particular to a linear temperature-sensitive fire detector with an electronic switch assembly. Background technique [0002] The currently commonly used linear temperature-sensing fire detector with NTC (negative temperature coefficient) characteristics is a fire detector with a wide range of uses. It mainly consists of a linear temperature sensing element with NTC characteristics and one end of the linear temperature sensing element. , which can detect the temperature or alarm electrical parameters (or sampling values) of the linear temperature sensing element in real time, and send out a fire alarm signal according to the temperature or alarm electrical parameters (or sampling values) The other end of the element, and a terminal resistor that monitors the wire-type temperature sensing element for open circuit. FIG. 1 is a schematic cross-sectional view of a linear temperature ...

Claims

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Application Information

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IPC IPC(8): G08B17/06G01K7/18H01H37/00
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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