Flexible single layer air duct

By incorporating sound-absorbing cotton and Velcro filters within the flexible duct, the problem of the flexible duct's inability to effectively absorb and block noise is solved. This achieves the effects of reducing noise transmission and improving air quality, extending the duct's service life and ensuring the efficient operation of the ventilation system.

CN224340274UActive Publication Date: 2026-06-09JIANGSU DAFENG ENVIRONMENTAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU DAFENG ENVIRONMENTAL TECH CO LTD
Filing Date
2025-06-23
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing flexible ducts are not capable of fully and efficiently absorbing and blocking noise in terms of structural design and material selection. As a result, noise can easily penetrate the duct wall and spread to the surrounding environment, making it difficult to meet increasingly stringent indoor noise control standards.

Method used

A noise reduction mechanism with sound-absorbing cotton filled with interlayered fabric and an air purification mechanism with a filter connected by Velcro are installed inside the flexible air duct. The sound-absorbing cotton in the interlayered fabric absorbs and blocks sound, and the Velcro allows the filter to filter pollutants. Combined with an anti-drip mechanism, annular reinforcing ribs and sealing rubber rings, the structural integrity and ventilation efficiency are improved.

Benefits of technology

It effectively reduces noise penetration, meets indoor noise control standards, improves air quality, extends the service life of air ducts, and ensures efficient operation of the ventilation system and a comfortable environment.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a flexible single-layer air duct, including a flexible air duct body, on which a noise reduction mechanism and an air purification mechanism are respectively arranged. The noise reduction mechanism includes: a sandwich fabric, which is disposed on the inner wall of the flexible air duct body. The inner cavity of the sandwich fabric is filled with sound-absorbing cotton. A zipper strap is provided between the left opening of the sandwich fabric and the inner wall of the flexible air duct body, and a zipper strap is provided on the zipper strap. This device addresses the problem that while some flexible air ducts improve installation convenience and spatial adaptability to a certain extent, their noise reduction performance still needs improvement. Common flexible air ducts, in terms of structural design and material selection, cannot comprehensively and efficiently absorb and block noise. When airflow passes through, the noise generated inside the duct easily penetrates the duct wall and propagates into the surrounding environment, making it difficult to meet increasingly stringent indoor noise control standards.
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