Indoor fire alarm sensing device

Abstract

The invention relates to the technical field of fire fighting equipment, in particular to an indoor fire alarm sensing device which comprises a mounting plate, a detection box, a master control room and an air pipe. The mounting plate is in a disc shape, bolt holes used for mounting the whole device on a house ceiling are formed in the mounting plate, the detection box is located between the mounting plate and a main control room, and the detection box is a tubular object; after the air pipe surrounds the annular groove, the air outlet is blocked, and the elastic sealing strip is used for blocking dust from entering the air pipe, so that the dust can be effectively prevented from entering the detection chamber to cause false alarm, the sensitivity and the real-time performance of smoke detection are improved, and after the air pipe falls down through downward operation of the push rod, the suction fan is started again, the air pipe can suck smoke at a low height into the detection chamber, the induction speed of smoke detection is increased, alarming is advanced, meanwhile, the suction fan only works when detection is needed, and resources are effectively saved.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, in particular to an indoor fire alarm sensing device. Background technique [0002] The fire detector is the equipment used in the automatic fire alarm system to detect the scene and find the fire. The fire detector is the "sensory organ" of the system, and its function is to monitor whether there is a fire in the environment. Once there is a fire, the characteristic physical quantities of the fire, such as temperature, smoke, gas and radiant light intensity, are converted into electrical signals, and immediately act to send an alarm signal to the fire alarm controller. [0003] Among them, the smoke alarm is usually installed on the ceiling of the house. When a fire breaks out, the smoke diffuses into the smoke alarm on the ceiling and sends a signal after detecting the smoke. However, due to the poor air circulation of the house, when a fire breaks out in the house It takes a ...

AI Technical Summary

Problems solved by technology

Since this kind of detector relies on the convection of the air to diffuse the smoke particles into the monitoring chamber, it takes a certain amount of time for the smoke to diffuse into the monitoring chamber from the initial stage of the fire, so it is impossible to monitor and alarm the fire in time; Dust will enter the monitoring chamber under normal monitoring conditions, which greatly affects the sensitivity and real-time performance of the detector.

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