Particulate matter concentration detection module

By designing light trap and filter structures in the laser dust concentration detection device, the problem of limited reflective area size was solved, achieving more efficient particulate matter concentration detection and improving the accuracy and consistency of detection results.

CN224436071UActive Publication Date: 2026-06-30GUANGDONG CHENGYI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG CHENGYI TECH CO LTD
Filing Date
2025-06-24
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing laser dust concentration detection devices, the limited size of the reflective area results in a short light reflection distance, and some of the reflected light is reflected back into the dust area, affecting the accuracy of the detection results.

Method used

A particulate matter concentration detection module was designed, which uses a light trap structure formed by a light-blocking plate and a reflector to increase the area of ​​the reflection zone. The light is consumed by multiple reflections through an extinction structure. Combined with a filter structure and a clearance groove design, the beam intensity and wavelength are kept consistent. A fan is used to maintain airflow stability.

Benefits of technology

It effectively reduces the interference of reflected light on the detection results, improves the accuracy and reliability of particulate matter concentration detection, and ensures the authenticity and consistency of the detection results.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a particulate matter concentration detection module. A light-blocking plate obstructs the entrance of the reflective area, forming a light trap structure together with the reflective area. Light emitted from the beam channel can only enter the reflective area through the light-transmitting hole. Within the reflective area, it is reflected onto the extinction structure of the extension plate. After multiple reflections by the extinction structure, the light entering the reflective area is consumed, preventing it from escaping through the light-transmitting hole again. The reflective area is located on the housing. With the length of the housing and the detection bracket remaining constant, the area of ​​the reflective area can be increased. The distance from the extinction structure to the reflective surface of the reflective area is increased, resulting in more light being consumed and reducing interference from the reflected light to the detection results of the light receiver.
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