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Linear temperature-sensing fire detector

A fire detector and line type technology, applied in the direction of electric fire alarms, instruments, thermometers, etc., can solve problems such as false alarms, increased conductivity, etc., and achieve the effect of ensuring normal operation

Inactive Publication Date: 2007-08-22
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 heat-sensitive fire detector: because the fusible salt inside the line-type temperature-sensing element in this kind of detector will dissolve when meeting water, thereby it is very sensitive to humid environment, therefore , once it is completely or partially in a humid environment, external moisture will penetrate into the meltable salt material layer 3 inside the linear temperature sensing element, thereby increasing its conductivity. At this time, the conversion box connected to one end of the linear temperature sensing element The change is detected immediately, thus potentially leading to false alarms

Method used

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Embodiment 1

[0017] FIG. 2 is a schematic structural diagram of the linear temperature-sensing fire detector provided by the present invention. 3 is a schematic transverse cross-sectional view of the linear temperature sensing element in the linear temperature sensing fire detector provided by the present invention. As shown in Figures 2 and 3, the linear temperature sensing fire detector provided by the present invention is mainly composed of a linear temperature sensing element and a conversion box 19 connected to one end of the linear temperature sensing element; wherein the linear temperature sensing element includes two The detection conductors 5, 9 arranged in parallel, the fusible salt (or eutectic salt) material layer 6 and the fusible insulating layer 7 arranged in parallel between the detection conductors 5, 9, and at least one of the detection conductors 5, 9 is elastic conductor. The detection conductor 5 is covered with a fusible salt material layer 6 and a fusible insulating...

Embodiment 2

[0022] This embodiment is an improvement on the basis of Embodiment 1: that is, one of the two detection conductors 5 and 9 of the above-mentioned linear temperature sensing element is made of a thermocouple wire, so as to form a thermocouple wire with the other detection conductor. If the linear temperature sensing element with even characteristics is used, the conversion box 19 will send out a fire alarm signal according to the voltage (potential) value of the linear temperature sensing element.

[0023] The working principle of the linear temperature-sensing fire detector provided by the present invention is as follows:

[0024] 1) Under normal circumstances, the ambient temperature is lower than the melting temperature of the fusible salt and the softening temperature of the fusible insulating layer 7 at the same time, the fusible salt inside the linear temperature sensing element does not melt, and the fusible insulating layer 7 is also There is no softening, so the resis...

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Abstract

This invention discloses a linetype temperature-sensing fire detector composed of linetype temperature-sensing elements and a converting box connected at one end of the elements, in which, the elements include two parallel set detection conductors and a metable salt material layer and a metable insulation layer set in parallel between the conductors, at least one is elastic, which sets the metable salt material layer and an insulation layer between two detection conductors to constitute a linetype temperature sensing element, even though outside moisture enters into it to melt the metable salt, yet a metable insulation layer still exists, and error warning will not happen to the fire detector.

Description

technical field [0001] The invention relates to a line-type temperature-sensing fire detector, in particular to a line-type temperature-sensing fire detector capable of being moisture-proof and waterproof, and therefore having high alarm reliability. Background technique [0002] At present, the commonly used linear temperature sensing fire detector is a widely used fire detector. It is mainly composed of a linear temperature sensing element and one end connected to the linear temperature sensing element. It is composed of a conversion box that detects the parameters (or sampling values) and sends out fire alarm signals according to the temperature or the size of the alarm electrical parameters (or sampling values). A linear thermal fire detector is disclosed in US Patent No. 5,793,293. FIG. 1 is a schematic cross-sectional view of the linear temperature sensing element in the linear temperature sensing fire detector. As shown in FIG. 1, this linear temperature sensing ele...

Claims

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Application Information

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