Photoelectric smoke fire detector

Abstract

The photoelectric smoke fire detector of the present invention includes a casing and a circuit board inside the casing, and is characterized in that the casing includes a base, an upper cover and a net cover connected sequentially from bottom to top, and the circuit board is provided with a labyrinth smoke cover and a buzzer The upper cover is provided with a transparent annular light-transmitting belt, and the upper cover also has holes corresponding to the smoke cover of the labyrinth and holes corresponding to the buzzer, and the net cover is covered at the smoke cover of the labyrinth. The invention has the beneficial effects of simple structure, convenient use, high sensitivity and beautiful appearance. The luminous display effect of the point-type smoke detector can be obviously improved, the installation process can be simplified, the production efficiency can be improved, the total manufacturing cost can be reduced, the benefit is remarkable, and it is convenient to popularize and use.

Description

technical field [0001] The invention belongs to the field of fire detection and alarm equipment, and relates to a photoelectric smoke fire detector. Background technique [0002] With the intelligent development of modern buildings, the number of combustible materials such as electrical equipment or decoration materials inside the building increases, and there are potential safety hazards. Fire alarm devices have increasingly become an indispensable safety facility for large buildings and public places. Extinguish the fire at its initial stage. At present, the fire alarm device often used in the fire protection industry is a point-type smoke detector. In the existing point-type smoke detectors, the light-guiding column used for luminous display is installed on the top or side of the entire point-type smoke detector in the form of a straight column perpendicular to the circuit board or in the form of a 90-degree refraction angle. Insufficient aesthetics, poor display effect...

AI Technical Summary

Problems solved by technology

In the existing point-type smoke detectors, the light-guiding column used for luminous display is installed on the top or side of the entire point-type smoke detector in the form of a straight column perpendicular to the circuit board or in the form of a 90-degree refraction angle. Insufficient aesthetics, poor display effect, low light transmission efficiency, assembly production efficiency and maintenance efficiency; and a large number of screws are used in the assembly structure of point-type smoke detectors. For example, circuit board screw connections are generally used, and countersunk heads Screws or combined screws, etc., increase the cost and reduce the manufacturing productivity

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