Detection device of airflow flow

Abstract

The present invention relates to an air flow rate detection device, belonging to the field of fire detection alarm technology. Said air flow rate detection device includes the following components: air flow sensing plate, flow rate measuring tube, air flow rate sensor, air flow temperature sensor and flow deflector, etc. Besides, said invention also provides their connection mode and its working principle.

Description

technical field [0001] The invention belongs to the technical field of fire detection and alarm, in particular to an airflow flow detection device for an aspirating detector. Background technique [0002] With the development of my country's economic construction, some special places that play a vital role in the national economy and social life (such as computing centers, graphic archives and information centers, post and telecommunications hubs, integrated circuit production workshops, nuclear power plants, large-scale modern scheduling control center, intelligent building control center, modern medical institutions, etc.) fire safety requirements are increasingly urgent. Due to the highly concentrated and long-term operation of various electrical equipment inside, there are many fire hazards. Once a fire occurs, it will cause great economic losses to the country and have a major impact on society. In view of the importance and particularity of these places, the problem of...

AI Technical Summary

Problems solved by technology

[0005] For the small range, high resolution, small scale, low consumption, and low cost requirements of air-breathing fire detector air flow detection, the above measurement methods mainly have the following shortcomings, among which the impeller type and hot wire type measurement methods are suitable For the detection of high-speed air flow, the measurement range is large and the resolution is low, and the sensing device is large and difficult to integrate; the differential pressure method needs to install pressure sensors at different positions to ensure sufficient differential pressure output signal strength, which is inconvenient for integration and assembly. And micro pressure sensors are more expensive; ultrasonic and laser Doppler measurement methods are technically complex and costly; the thermal bulb type has a simple structure and small size, but the sensor is easy to damage, and there is no standard general-purpose sensor for commercial purchase, the price is high

Therefore, the above airflow flow measurement technologies are not suitable for integrated use in aspirating fire detectors

Images