A compound linear temperature-sensitive fire detector and its alarm method
A kind of fire detector, composite technology, applied in fire alarms with electric action, thermometers and instruments with electric/magnetic elements that are directly sensitive to heat, can solve the sensitivity of distributed linear optical fiber temperature-sensitive fire detectors Problems such as low switching value, unusable cable-type linear temperature-sensitive fire detectors, and limited application range of cable-type linear temperature-sensitive fire detectors have achieved the effects of uninterrupted continuous fire detection, increased sensitivity, and improved stability
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Embodiment 1
[0047] System embodiment 1: such as figure 1 As shown, the composite linear temperature-sensing fire detector provided by Embodiment 1 of this system includes a temperature-sensing component, a signal processing unit, and a terminal resistor. The terminal resistor includes a terminal resistor R1 and a terminal resistor R2.
[0048] The temperature-sensing component includes three detection bodies arranged in parallel: a first detection body, a second detection body and a third detection body. Such as figure 2 As shown, the first probe includes a first metal conductor 1 and several temperature sensing elements 2 connected in series through the first metal conductor 1; the second probe is a second probe coated with an NTC characteristic material layer 5 outside. Metal conductor 3; the third probe includes a third metal conductor 4 coated with an NTC characteristic material layer 5; the distance between adjacently placed temperature sensing elements 2 is not more than 1 meter; ...
Embodiment 2
[0062] System Embodiment 2: The structure is basically the same as that of System Embodiment 1, and the similarities will not be repeated here. The difference is:
[0063] Such as Figure 4 As shown, the temperature sensing component includes three detection bodies arranged in parallel: a first detection body, a second detection body and a third detection body. Such as Figure 5 As shown, the first probe includes a first metal conductor 1 and several temperature sensing elements 2 connected in series through the first metal conductor 1; the second probe is a second probe coated with an NTC characteristic material layer 5 outside. Metal conductor 3; the third probe includes a third metal conductor 4 coated with an NTC characteristic material layer 5; the distance between adjacently placed temperature sensing elements 2 is not more than 1 meter; that is, any adjacent The maximum spacing D (max)≤1 meter between the temperature sensing elements placed in series; the first electr...
Embodiment 3
[0069] System Embodiment 3: The structure is basically the same as that of System Embodiment 1, and the similarities will not be repeated here. The difference is:
[0070] The second detection body is a second metal conductor, and the outer side is not covered with an NTC characteristic material layer.
[0071] The first probe body is covered with an insulating sheath to form a first temperature-sensing cable; the second probe body and the third probe body arranged in parallel are closely attached to each other or twisted into one at an equal distance, and then covered with an insulating sheath to form a second probe body. A temperature-sensing cable; the first temperature-sensing cable and the second temperature-sensing cable are closely attached in parallel or twisted together at equal distances.
[0072] The normally closed temperature switch is a non-resettable normally closed temperature switch.
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