Wall feed-through for an internal heat pump assembly
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Solution Overview
Problem
Existing wall ducts for heat pump systems inside buildings face challenges in providing adequate soundproofing and thermal insulation while ensuring simple installation, often requiring adjustment to fit different wall thicknesses and risking thermal bridges and animal intrusion.
Innovation Solution
A wall duct design featuring silencer links arranged parallel to the air passage direction, incorporating sound-absorbing materials, a telescoping structure with insulating material, and a weather protection grille with additional wire mesh for enhanced soundproofing and animal exclusion, along with an elliptical hose connector for reduced leaks and energy losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple sound-dampening baffles are added to the wall penetration, then sound insulation is improved, but flow resistance increases
Solution Approach 1:
The silencer baffles are arranged essentially parallel to the airflow direction rather than perpendicular, creating localized sound absorption zones while maintaining open flow paths. This selective orientation reduces flow resistance while preserving sound insulation functionality in specific areas where noise transmission occurs.
2Ease of manufacture
If a fixed-length wall penetration is used, then manufacturing is simplified, but adaptability to different wall thicknesses is reduced
Solution Approach 1:
The wall penetration is divided into a first part and a second part that can be telescopically inserted into each other. This segmentation allows the penetration length to be adjusted by extending or retracting the telescopic sections, enabling adaptation to various wall thicknesses while maintaining standardized manufacturing of individual components.
3Ease of operation
If the wall penetration components are in direct contact, then installation is simplified, but thermal bridges are created
Solution Approach 1:
An insulating material is arranged between the first part and the second part of the wall penetration, acting as a thermal intermediary that prevents direct thermal contact. This intermediary layer eliminates thermal bridges while the telescopic design allows for easy installation despite the added component.
4Volume of moving object
If the wall penetration is made compact, then installation space is reduced, but sound insulation effectiveness is compromised
Solution Approach 1:
The silencer baffles are oriented parallel to the airflow direction rather than perpendicular, utilizing the length dimension of the penetration to provide sound absorption path length without increasing the cross-sectional area. This dimensional approach maintains a compact penetration profile while achieving effective sound attenuation through extended exposure to sound-absorbing materials.
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 solution provides improved soundproofing, thermal insulation, and easy installation by maintaining low flow resistance and preventing thermal bridges and animal intrusion, while accommodating various wall thicknesses without the need for duct shortening.
Implementation Method 1
the silencer baffles have sound-absorbing material
Implementation Method 2
insulating material is arranged between the first and second parts to prevent thermal bridges
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The house wall duct (100) has splitter attenuators arranged substantially parallel to an air passage direction of the wall bushing. Two sections (101,102) are designed such that the former section and the latter section are pushed telescopically into one another. A damping material (140) is arranged between the two sections, where a protective grid (110) is arranged at an exterior wall.