Ventilation Housing With Integrated Acoustic Lining and Low Pressure Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ventilation components face challenges with high sound power levels and increased housing length due to the placement of splitter silencers, which reduces fan suction power and is not desirable for space efficiency or sound reduction.
Innovation Solution
The design incorporates soundproofing materials within the channel-shaped housing, allowing for improved soundproofing by placing the materials close to the fan, reducing pressure loss, and using a configuration that allows for a shorter housing length, with options for various cross-sectional shapes and arrangements to adapt to different housing sizes and apertures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a splitter silencer is mounted with a distance of at least half the impeller diameter from the screen, then soundproofing is improved, but the housing length increases and fan suction power is reduced
Solution Approach 1:
The invention extracts the soundproofing function from the traditional splitter silencer and implements it through sound-absorbing material integrated directly into the housing walls. This eliminates the need for a separate splitter silencer component and its associated mounting distance requirements, thereby reducing housing length while maintaining soundproofing effectiveness.
Solution Approach 2:
The sound-absorbing material is merged with the housing structure itself, combining the housing and soundproofing functions into a single integrated component. This eliminates the need for separate soundproofing components and their mounting spaces, resolving the contradiction between soundproofing performance and compact housing dimensions.
2Object-affected harmful factors
If a splitter silencer is mounted with a distance of at least half the impeller diameter from the screen, then soundproofing is improved, but fan suction power is reduced
Solution Approach 1:
By extracting the soundproofing function from a separate splitter silencer and integrating it into the housing walls, the invention eliminates the space-consuming mounting distance that previously interfered with fan airflow and reduced suction power.
Solution Approach 2:
The sound-absorbing material is applied locally to the housing walls in the regions where soundproofing is needed, rather than using a bulky splitter silencer structure. This localized approach maintains effective sound absorption while preserving optimal airflow paths to the fan, thereby maintaining fan suction power.
3Length of stationary object
If soundproofing material is placed close to the fan, then housing length is reduced, but soundproofing effectiveness may be compromised
Solution Approach 1:
The housing walls serve multiple functions: structural containment and integrated soundproofing. By making the housing walls themselves the soundproofing element through integrated sound-absorbing material, the invention achieves effective sound reduction in close proximity to the fan without compromising soundproofing performance.
Solution Approach 2:
The invention changes the parameter of soundproofing implementation from a distance-based approach (splitter silencer mounting distance) to a material-based approach (sound-absorbing material integration into housing walls). This parameter change allows effective soundproofing at any distance from the fan, including very close placements.
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
This configuration results in a ventilation component with reduced sound power levels and lower pressure loss compared to traditional designs, while maintaining effective fan operation and allowing for use in space-constrained areas.
Implementation Method 1
A ventilation component according to the invention has lower sound power levels compared to known ventilation components with at least the same level of sound-absorbing and/or sound-damping
Implementation Method 2
In the flow channel, which is preferably arranged in the middle, the flow is already accelerated in front of the orifice to the speed level in the region of the opening (orifice flow) provided in the orifice
Implementation Method 3
In a radial fan, the air is usually sucked in parallel to the drive axis of the radial fan and deflected by 90° due to the rotation of the radial impeller and blown out radially
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The ventilation device has channel shaped structure provided with circumferentially spaced housing walls (1). The housing is provided with radial fan (2) that is arranged along flow direction (4) upstream of aperture (5). The aperture is provided with opening (6) through which medium is passed to radial fan. The sound insulation and sound damping material is provided in housing walls such that lower acoustic power is circulated through aperture along the flow direction upstream of housing walls by releasing flow channel.