Linear heat fire detector

Abstract

The invention provides a line type heat fire detector. The line type heat fire detector comprises a signal processing unit and a sensitive component, wherein the sensitive component is connected with the signal processing unit; the sensitive component comprises one-stage or multi-stage detecting units; the detecting unit in each stage corresponds to one address region in field monitoring; a first-stage detecting unit is connected with the signal processing unit, and starting from a second-stage detecting unit, other detecting units are sequentially in cascade connection; the signal processing unit is used for supplying power to and sending an order to the detecting units, and each detecting unit is used for sending monitoring information, which is obtained by the detecting unit and at least comprises temperature data information, to the signal processing unit. The line type heat fire detector provided by the invention has the advantages that the cost is low, the detection range is wide, a zoning monitoring function is obtained, non-contact temperature measurement can be realized, and electromagnetic interference brought by contact type installation is avoided; the anti-electromagnetic interference ability and the early fire response ability are stronger.

Description

technical field [0001] The invention relates to a fire detector, in particular to a multi-component combined linear temperature-sensitive fire detector in the subject of safety engineering. Background technique [0002] At present, there are three mature linear temperature-sensing fire detectors used in electric power, metallurgy, petrochemical and other industrial fields: switch value linear constant temperature fire detector, analog linear constant temperature fire detector and analog linear differential constant temperature fire detector fire detector. These three kinds of detectors are all processed into cables with temperature-sensitive materials and covered with sheaths. The detection mechanism is usually the principle of impedance change, that is, the detectors are made of cable materials with special temperature coefficients. When the detectors protect When the ambient temperature of the area changes, the impedance of the cable also changes accordingly, and the dete...

AI Technical Summary

Problems solved by technology

[0003] In the current engineering application of linear temperature-sensitive fire detectors, there are mainly the following problems: First, due to the restriction of the structure and detection mechanism, the protection radius of a detector is limited, so the protection range of the detector is limited, and the project is increased. The cost of equipment reduces the cost performance of engineering applications

Second, because most of the application places are places with strong electromagnetic interference, the linear temperature-sensitive fire detector is susceptible to electromagnetic interference. In order to prevent false alarms, the sensitivity of the detector is lowered. In some cases, the differential temperature function is simply shielded, and only the constant temperature alarm function is retained, which makes the detector unable to realize early fire detection and delays the best time for alarm and fire fighting and rescue.

Fourth, the linear temperature-sensitive fire detectors currently used do not have the functions of monitoring the temperature of the area and displaying the alarm position, thus limiting the use length and application places of the detectors

[0004] Due to the existence of the above problems, the application range of linear temperature-sensitive fire detectors is greatly limited, and the early fire response ability of the detectors is affected.

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