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Alarm method of linear constant temperature fire detector for improving response rate

A technology of fire detector and response speed, which is applied in the field of alarm, can solve problems such as long time and failure to meet the requirements of fire response time, and achieve the effect of improving response speed

Inactive Publication Date: 2007-08-08
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the influence of the heat transfer time of the temperature-sensitive material layer, it will take a long time for the heated part to reach the constant temperature alarm threshold, and this cannot meet the fire response requirements specified in GB16280-2005 "Linear Temperature Sensing Fire Detector". time requirement

Method used

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  • Alarm method of linear constant temperature fire detector for improving response rate

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Effect test

Embodiment 1

[0013] As shown in Figure 1, the linear temperature sensing element used in the alarm method of the linear constant temperature fire detector that can improve the response speed provided by the present invention is a linear temperature sensing element with NTC characteristics, which consists of two parallel The detection conductors 4, 5 and the NTC characteristic barrier layer 6 arranged in parallel between the detection conductors 4, 5 are composed. The two detection conductors 4, 5 can be arranged in parallel, winding or coaxial manner. When a fire occurs, the heat generated by the fire source will quickly transfer to the NTC characteristic barrier layer 6 inside the heated part of the linear temperature sensing element. At this time, the conversion box 7 connected to one end of the linear temperature sensing element can immediately detect the linear temperature Sensing the change rate of the resistance value of the element, once the change rate exceeds the set differential ...

Embodiment 2

[0015] This embodiment is an improvement on the basis of Embodiment 1: one of the above-mentioned two detection conductors 4, 5 is made of thermocouple wire, so as to form a linear temperature curve with thermocouple characteristics with the other detection conductor. The sensing element, the conversion box will send out a fire alarm signal according to the voltage (potential) value or the rate of change of the voltage value of the linear temperature sensing element.

[0016] When the linear constant temperature fire detector used in the alarm method of the linear constant temperature fire detector that can improve the response speed provided by the present invention is heated, the resistance value of the NTC characteristic barrier layer 6 inside the linear temperature sensing element at the heated part changes. The rate of change or the rate of change of the voltage value will change with the rise of the temperature. At this time, the conversion box connected to one end of the...

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Abstract

The invention discloses a linear fixed temperature alarm fire detector method that can improve public response time. It includes the converter box that detects the electrical parameters and the volume changes of the linear temperature perception components with NTC or NTC and thermocouple characteristic in real time. When the converter box to detect changes in these parameters exceed the rate differential alarm threshold settings, regarding whether the linear temperature perception components exists 'Short Circuit' and 'opening' or 'electric parameters over fixed temperature alarm threshold' of the fire, immediately issued a fire alarm signal phase. Because when the detector tests the response time of alarm, the time of that parameters change rate exceeds the alarm threshold arrives before the time of that the parameters exceeds the fixed alarm temperature, the alarm method in the invention can improve the response time of linear fire detector.

Description

technical field [0001] The invention relates to an alarm method, in particular to an alarm method of a linear constant temperature fire detector capable of improving response speed. Background technique [0002] The currently commonly used linear constant temperature fire detector is a fire detector with a wide range of uses. It is mainly composed of a linear temperature sensing element and one end connected to the linear temperature sensing element, which can monitor the alarm electrical parameters on the linear temperature sensing element in real time ( or sampled value) for detection, and a conversion box that sends out a fire alarm signal according to the size of the alarm electrical parameter (or sampled value), and is divided into two types: recovery type and non-recovery type according to the structure of the linear temperature sensing element. Wherein the linear temperature sensing element is mainly composed of two detection conductors arranged in parallel and a temp...

Claims

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Application Information

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