In-Wall HVAC Noise Enclosure With Split Intake and Exhaust Chambers
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Solution Overview
Problem
In-wall HVAC systems generate significant noise due to compressors and air movement, which can disturb neighbors and violate community noise regulations, and existing noise reduction methods fail to adequately lower sound pressure levels to acceptable levels.
Innovation Solution
A noise reduction system comprising two chambers for intake and exhaust air, with active and passive noise reduction features, is mounted on the exterior wall of a dwelling to capture and dissipate noise, incorporating a housing structure with strategically positioned openings and optional active noise cancellation systems to minimize noise impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If compressors and air handling systems are positioned adjacent to or within exterior walls, then HVAC system functionality is maintained, but noise disturbance to neighbors increases
Solution Approach 1:
The patent divides the exterior wall into multiple sections: a first section for the HVAC system and a second section for the noise reduction system. This segmentation allows the HVAC system to maintain its functionality while the noise reduction system independently addresses noise disturbance to neighbors.
2Object-affected harmful factors
If variable speed systems are employed, then noise levels are reduced, but substantial noise is still generated when running at full operation
Solution Approach 1:
The patent introduces a noise reduction system as an intermediary component between the HVAC system and the external environment. This intermediary system includes a housing with insulation material that absorbs and reduces noise, particularly when the HVAC system operates at full capacity, without interfering with the HVAC system's productivity.
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 system effectively reduces sound pressure levels, improving HVAC efficiency by separating intake and exhaust air flows and incorporating noise-absorbing materials and active noise cancellation, thus minimizing noise disturbance and compliance with community noise standards.
Implementation Method 1
the chambers of the noise reduction system can incorporate active and passive noise reduction features
Implementation Method 2
the chambers of the noise reduction system can incorporate active and passive noise reduction features
Data Source
AI summary
This invention provides a noise reduction system for in-wall HVAC systems. The noise reduction system can be constructed as a box structure that can be attached to an exterior wall of a dwelling where the box structure overlaps the intake air vent and the exhaust air vent of the in-wall HVAC system. For new or remodeled construction, the noise reduction system may be built into the dwelling's exterior wall so that the amount of noise reduction system's protrusion beyond the flat surface of the exterior wall is minimized. For additional noise reduction, the noise reduction system can incorporate active and/or passive noise reduction features.