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Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof

A fire detector and electronic switch technology, which is applied to electrical fire alarms, thermometers and instruments using electrical/magnetic components directly sensitive to heat, etc., can solve the problems of reducing the reliability and sensitivity of detector alarms, etc. Achieve the effect of eliminating alarm reliability and low sensitivity

Active Publication Date: 2011-01-12
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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  • Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof
  • Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof
  • Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as image 3 As shown, the linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment includes a linear temperature sensing element, one end connected to the linear temperature sensing element, and can monitor the temperature or alarm voltage of the linear temperature sensing element in real time. Parameter (or sampling value) detects the conversion box 5 and the electronic switch assembly 8 connected to the other end of the linear temperature sensing element; wherein the linear temperature sensing element includes two detection conductors 1, 2 arranged in parallel and arranged in parallel on the detection conductor The barrier layer 3 with NTC characteristics between 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.

[0023] The alarm method using the above-mentioned linear temperature-sensitive fire d...

Embodiment 2

[0028] Such as Figure 4 As shown, the linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment includes a linear temperature sensing element, one end connected to the linear temperature sensing element, and can monitor the temperature or alarm voltage of the linear temperature sensing element in real time. Parameters (or sampled values) are detected by the conversion box 5 and the electronic switch assembly 8 connected to the other end of the linear temperature sensing element; wherein the linear temperature sensing element includes two detection conductors 1, 2 arranged in parallel and arranged in parallel on the detection conductor The NTC characteristic barrier layer 3 and the meltable insulating layer 7 between 1 and 2, and at least one of the detection conductors 1 and 2 is an elastic conductor or a memory alloy wire. The linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment is the...

Embodiment 3

[0030] 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.

[0031] Described electronic switch assembly 8 can be the following several modes, but not limited to this:

[0032] 1) Relay type switch assembly, the opening and closing control mode of the relay can be wireless control mode or wired control mode;

[0033] 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;

[0034] 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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PUM

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Abstract

The invention discloses a linear temperature sensing fire detector with an electronic switch assembly and an alarming method thereof. The linear temperature sensing fire detector and the alarm method thereof can detect whether a linear temperature sensing element has a broken circuit or not by turning off the electronic switch assembly. Meanwhile, whether a fire alarming signal is sent or not is determined according to a condition whether an electrical parameter (or a sampling value) detected by a switching box exceeds an alarming threshold value or not when the electronic switch assembly is in an on state, thus the state of the linear temperature sensing element can be detected and judged at any time, and the problem of lower alarming reliability and sensitivity under the condition of anopen circuit can also be eliminated.

Description

technical field [0001] The invention relates to a linear temperature-sensitive fire detector and an alarm method thereof, in particular to a linear temperature-sensitive fire detector with an electronic switch assembly and an alarm method thereof. 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. figure 1 It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/06G01K7/04
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY