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

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

Active Publication Date: 2010-02-24
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] like image 3 As shown, the linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment includes a linear temperature sensing element and one end connected to the linear temperature sensing element, which can detect the temperature of the linear temperature sensing element or the alarm voltage in real time. The conversion box 5 for parameter (or sampled value) detection 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 parallelly arranged detection conductors 1, 2 and a parallel arrangement on the detection conductor The NTC characteristic blocking layer 3 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-sensing fi...

Embodiment 2

[0028] like Figure 4 As shown, the linear temperature-sensing fire detector with electronic switch assembly provided in this embodiment includes a linear temperature sensing element and one end connected to the linear temperature sensing element, which can detect the temperature of the linear temperature sensing element or the alarm voltage in real time. The conversion box 5 for detecting the parameters (or sampling values) 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 parallelly arranged detection conductors 1 and 2 and a parallel arrangement on the detection conductor The NTC characteristic blocking 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. Except that the structure of the linear temperature sensing element is different from that of the ...

Embodiment 3

[0030] In this example, one of the detection conductors 1 and 2 on the linear temperature sensing element in Example 1 and Example 2 is made of thermocouple wire material, and the other one constitutes a temporary thermocouple, thereby forming a thermocouple with The characteristic linear temperature sensing element, and other structures and working principles are the same as the above two embodiments.

[0031] The electronic switch assembly 8 can be in the following ways, but not limited to this:

[0032] 1) Relay type switch components, 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 at both ends of the diode;

[0034] 3) Zener diode type switch components, the opening and closing control mode of the Zener diode can be controlled by the power supply voltage app...

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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 methodthereof 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 line-type temperature-sensing fire detector and an alarm method thereof, in particular to a line-type temperature-sensing fire detector with an electronic switch assembly and an alarm method thereof. Background technique [0002] At present, the commonly used linear temperature-sensing fire detector with NTC (negative temperature coefficient) characteristics is a widely used fire detector, which mainly consists of a linear temperature sensing element with NTC characteristics and one end connected to 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 size of the temperature or the alarm electrical parameters (or sampling values). The other end of the element is composed of a terminating resistor that monitors the disconnection of the linear tempera...

Claims

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Application Information

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IPC IPC(8): G08B17/06G01K7/04
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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