Self-cleaning air sampling alarm device and working method thereof

Abstract

The invention discloses a self-cleaning air sampling alarm device which comprises a valve assembly, a fan assembly, a base, a driving motor, a valve group coupler and an MCU controller integrated on aPCB, the fan assembly is communicated with one end of the valve assembly through the valve group coupler, and the other end of the valve assembly is provided with a plug. The fan assembly is used forproviding sample gas flow with stable wind pressure, the valve assembly is used for realizing multipath sampling detection feedback results, and the MCU controller is used for receiving and feeding back instructions to realize automatic control. The device has the beneficial effects that the structure is simple, the wind speed loss is good, pipe network cleaning and pressurizing functions can beswitched, during normal work, a high-pressure air inlet of the air blower is cut off, and the air suction type fire detector on the pipe network is prevented from being damaged; during cleaning, the air blower sucks air through the air filter and outputs high-pressure clean air; and during pressurization work, the sensitivity of the air-breathing fire detector can be improved.

Description

technical field [0001] The invention belongs to the technical field of fire protection equipment, in particular to a self-cleaning air sampling alarm device and a working method thereof. Background technique [0002] In the automatic fire alarm system, the very early fire detector is to inhale the air in the protected area into the detector through the air sampling pipe for analysis so as to give early warning of fire. It has the characteristics of high sensitivity and wide detection range. It not only detects fires, but also can prevent fires. It is widely used in airports, rail transit, data center rooms, warehouses and other scenarios. China's fire protection market mainly imports VESDA and SECURITONASD, and domestic products include FMST, Bokang, Wagner, Gulf and other products; these products have product advantages, but also have many disadvantages: [0003] (1) The air flow is insufficient when the pipeline is slightly long; [0004] (2) During use, the sampling hol...

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Problems solved by technology

[0003] (1) The air flow is insufficient when the pipeline is slightly long;

[0004] (2) During use, the sampling hole is easily blocked;

[0005] (3) The ambient PM2.5 becomes higher and causes errors;

[0006] (4) The cost of equipment is expensive, and the cost of operation is tens of thousands;

[0007] (5) Single function: For the monitoring of complex environments, multiple devices with single functions are required for combined detection

[0008] During the use of early aspirating fire detectors, low airflow and blockage of sampling holes often occurred, resulting in delays in fire alarm detection or non-detection

[0009] At present, the very early fire detectors used in China do not have the function of self-blowing and cleaning the pipe network. They mainly use blowers or air compressors to manually clean the pipe network, which may cause the pipe network to rupture, and the daily maintenance is quite troublesome.

In order to solve the disadvantages of very early fire detectors, combined with daily use experience, the company designed and developed a detector that integrates detection and automatic flushing of the pipe network. Quality monitoring and other functions, modular design, expand detection items (such as temperature and humidity, harmful gases, PM2.5, etc.) Air flow failure and detector sensitivity reduction. At present, most of the automatic alarm system schemes of early aspirating fire detectors do not have the automatic purging function of the sampling pipe network. During the operation of the equipment, the sampling holes will be attached to the Dust accumulates slowly, reducing the effective air intake area of ​​the sampling hole, and may directly block it, seriously affecting the fire detection sensitivity and system reliability

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