Air Duct Silencer Mounting with Detachable Half-Shells
Solution Overview
Problem
Existing silencers for air ducts are difficult to assemble and adapt to various installation situations, lacking clear structural details for mounting and requiring additional fasteners, which limits their versatility and ease of use.
Innovation Solution
A silencer design featuring detachable half-shells with a fastening device that allows for adjustable length and easy mounting in air ducts, utilizing multiple sound-absorbing materials and a standardized connection to ensure secure and versatile installation, with a fastening mechanism that provides a defined clamping force and easy repositioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional silencer designs are used, then mounting is possible, but assembly is difficult and adaptation to various installation situations is limited
Solution Approach 1:
The silencer is divided into a modular construction with a holding device that can accommodate different insulation elements. The holding device itself is segmented into two half-shells that can be detached for assembly and disassembly, allowing easy adaptation to various installation situations while maintaining a relatively simple overall structure.
Solution Approach 2:
The holding device is designed with detachable half-shells connected by a fastening device, allowing the structure to be dynamically assembled and disassembled. This dynamic design enables easy adaptation to different installation situations without requiring complex permanent mounting structures.
2Ease of operation
If standardized connection is used, then easy mounting is achieved, but additional fastening devices are required
Solution Approach 1:
The fastening device is integrated directly into the holding device structure, merging the functions of the holding device and the fastening mechanism into a single component. This eliminates the need for separate additional fastening devices while maintaining ease of mounting through standardized connections.
Solution Approach 2:
The holding device is designed to be self-fastening through its integrated fastening device with undercut locking sections. The silencer can be inserted and secured without requiring external fastening operations or additional tools, achieving easy mounting while reducing the number of separate fastening components needed.
3Object-affected harmful factors
If multiple insulation elements are used, then sound insulation across wide frequency range is improved, but device complexity increases
Solution Approach 1:
The silencer accommodates multiple insulation elements (first and second insulation elements) with different sound absorption characteristics within a single holding device. This segmentation of the insulation system allows coverage of different frequency ranges while maintaining a unified, manageable structure that does not excessively increase device complexity.
Solution Approach 2:
The silencer uses composite insulation construction with different materials (e.g., mineral wool and glass wool) having different sound absorption properties. This composite approach improves sound insulation across a wide frequency range by combining the advantages of different materials, while the unified holding device keeps the overall structure relatively simple.
4Adaptability or versatility
If detachable half-shells are used, then variable adaptation is enabled, but manufacturing complexity increases
Solution Approach 1:
The holding device is divided into two half-shells that can be manufactured separately and then assembled. This segmentation allows for simpler manufacturing of individual half-shell components compared to a monolithic structure, while the standardized fastening device ensures relatively simple assembly processes, balancing manufacturability with adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The silencer can be easily adapted to different spatial conditions, providing improved sound insulation across a wide frequency range and ensuring secure, easy mounting and repositioning without additional fasteners, enhancing comfort by reducing noise emissions in non-industrial applications.
Implementation Method 1
at least one sound-absorbing insulation element extending substantially in a longitudinal direction
Implementation Method 2
the holding device has at least one thickened portion, in particular a spherical or lens-shaped portion, arranged on its outer circumference to generate a defined clamping force between the silencer and the air duct
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Silencer (401) for installation in an air duct (421), in particular in a flat duct, with at least one sound-absorbing insulating element (402) extending substantially in a longitudinal direction (X), and with at least one holding device (403) that receives the insulating element (402) at least section by section, which has a fastening device (404) for fixing the silencer (401) in the air duct (421).