Smoke-sensing fire detection alarming device

Abstract

The invention relates to an intake-type smoke-sensing fire detection alarming device adopting a laser tube as a luminous element, which is provided with a circular universal base, wherein the circular universal base is fixed on a roof or a ceiling through a screw, and an alarming device is buckled on the base in a threading way; a bottom support, a circuit board, a middle support, a main body, a blower and a filter box are sequentially installed on the base, and finally, an alarming device upper cover is installed; a detecting cavity and the circuit board are arranged inside a space which is formed by the bottom support and the middle support, the circuit board is arranged above the middle support, a copper foil is wrapped on the four walls of the space, and the space is provided with an air outlet; the main body covers the space; two sides of the main body are respectively fixed by a choke plug; a display module is embedded on the main body; the blower is closed and wrapped by the middle support and the main body; the main body is connected with a filter bottom cover, and a filter screen is installed inside a space which is formed by the filter bottom cover and a filter upper cover. The alarming device has low cost and price and a small size and is convenient to install; the protection area is small (64 square meters), the alarming device is suitable for the small important fireproof field; and the large-sized networking and the remote monitoring can be carried out.

Description

technical field [0001] The invention relates to an alarm, in particular to a fire detection alarm. Background technique [0002] Smoke detectors alarm by detecting the smoke generated when the combustibles are smoldering at the initial stage of the fire, so they play the role of pre-alarm in most occasions. The most widely used smoke detectors are ionization smoke detectors and photoelectric smoke detectors. [0003] Ionization smoke detectors and photoelectric smoke detectors are products and technologies that started decades ago, and are popular because of their low prices. However, with the development of technology, their shortcomings have become more obvious. Traditional smoke detectors have low sensitivity, and the detection method is a passive alarm method. Even if the alarm is activated, an open flame has already appeared, and the loss is serious. The light source is broad-spectrum, does not need to be focused and has a simple structure, and has no obvious response ...

AI Technical Summary

Problems solved by technology

For some small mobile transmitter rooms, it is not only bulky and expensive, but also overkill

[0004]1. Low sensitivity: the sensitivity is only 2-10% obs / m, that is, the alarm can only be generated when the room is full of smoke, and the room is already full of a large amount of air when the alarm is issued. Thermally decomposed and unburned substances (smoke), at this time, once there is an open flame, the smoke will be ignited, forming an indoor deflagration or called flash combustion, so once the deflagration can only be extinguished by water, although the indoor property has not been burned , but also all scrapped

Therefore, when using ionization smoke detectors and photoelectric smoke detectors to alarm, there is not enough time to deal with the initial fire, and flash combustion will soon occur.

[0005]2. Need to clean and calibrate sensitivity frequently: Due to the passive open type and other smoke, after a long time of operation, the optical system and the devices that emit light and receive light will be damaged. There is a lot of dust, which reduces the sensitivity, so it must be removed and cleaned regularly (1-2 years).

If there is dust on the optical system, astigmatism will spontaneously form on the light-emitting element of the astigmatism probe, causing alarms or false alarms

[0006]3. The ionization smoke detector contains radioactive elements. This radioactive element cannot be properly disposed of after the product lifespan, pollutes the environment, and is also harmful to the environment during cleaning. cause pollution, so the country also let it gradually phase out

[0007]4. Although the large aspirating smoke detection alarm has high sensitivity and low false alarm rate, its individual protection area is about 300-2000 square meters. The cost is high, and it is generally only used in more important large-area places, and it can be extended to small places

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