Side Air Intake Vent With Sound Barrier for Refrigeration Cabinets
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Solution Overview
Problem
Refrigeration appliances with machine compartments vented on the sides experience inefficient cooling due to mixing of warm and cool air, and higher noise levels compared to those with back-vented designs, particularly when side vents are not blocked.
Innovation Solution
An insulated cabinet design with a side-vented air intake system featuring an air vent with louvers on the exterior and a sound barrier with matching louvers on the interior, positioned to prevent mechanical access and reduce sound leakage while maintaining airflow, providing a sound power reduction of at least 5 dB(A) at certain octave bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If side vents are provided for machine compartment air intake, then cooling efficiency is improved, but noise levels increase
Solution Approach 1:
The side vent is segmented into two distinct components: an exterior air vent with louvers for air intake and an interior sound barrier with louvers for noise reduction. This segmentation allows the system to simultaneously achieve cooling efficiency through air flow while reducing noise levels by at least 5 dB(A) through the sound barrier's acoustic properties.
Solution Approach 2:
The sound barrier acts as an intermediary element between the machine compartment interior and the exterior environment. It is positioned at the interior surface of the side wall and features louvers that allow air flow while dampening sounds from within the machine compartment, thus mediating between the conflicting requirements of cooling and noise reduction.
2Temperature
If side vents are provided for machine compartment air intake, then cooling efficiency is improved, but mechanical access to components is compromised
Solution Approach 1:
The vent system is divided into an exterior air vent portion and an interior sound barrier portion, both with louvers. This segmentation creates a protected pathway where air can flow through the louvers while the sound barrier's positioning and louver configuration prevent direct mechanical access to components within the machine compartment through the vent opening.
3Object-generated harmful factors
If sound barrier is added at interior surface, then noise levels are reduced, but device complexity increases
Solution Approach 1:
The sound barrier is designed to perform multiple functions simultaneously: it reduces noise levels from the machine compartment, allows air flow through its louver configuration, and provides mechanical protection by preventing access to internal components. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The sound barrier integrates several functions into a single component: acoustic dampening, air flow facilitation through louvers, and mechanical protection. By merging these functions into one element rather than using separate components, the overall device complexity is minimized while achieving the desired noise reduction of at least 5 dB(A).
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 side-vented air intake system effectively cools the machine compartment by preventing air mixing and significantly reduces noise levels outside, while ensuring airflow and mechanical protection within the compartment.
Implementation Method 1
a sound barrier provided at the interior surface of the first side wall at the aperture, the sound barrier dampens sounds from within the machine compartment to reduce resulting sound levels outside the air vent
Implementation Method 2
an aperture provided through the first side wall to allow air to flow from outside the insulated cabinet into the machine compartment
Data Source
AI summary
A refrigeration appliance includes an insulated cabinet having a side wall and a machine compartment positioned adjacent the side wall. An aperture is provided through the first side wall to allow air to flow into the machine compartment. An air vent is provided at the exterior surface of the side wall so as to cover the aperture. The air vent having a first set of louvers. A sound barrier is provided at the interior surface of the side wall at the aperture. The sound barrier has a second set of louvers, where the second set of louvers are positioned with respect to the first set of louvers such that there is no mechanical access to components in the machine compartment through the air vent, and such that sounds from within the machine compartment are dampened while still allowing air to flow through the air vent.