Elastic Plug Venting for Loudspeaker Box Pressure and Heat Management
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Solution Overview
Problem
Closed loudspeaker boxes face issues with air pressure imbalance and heat accumulation due to their sealed design, affecting acoustic characteristics and service life, and existing solutions with large vent holes cause abnormal sounds.
Innovation Solution
A closed loudspeaker box design featuring a plug with a vent hole that communicates the chamber and outside space, using an elastic material plug with a stepped structure to ensure air tightness and heat dissipation without generating abnormal sounds, by inserting the plug into a through hole after an air tightness test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is completely closed to eliminate acoustic short circuits, then acoustic performance is improved, but air pressure imbalance and heat accumulation occur
Solution Approach 1:
The housing is segmented into a sealed chamber and a vented region, with the plug providing selective communication. The plug divides the housing interior into a sealed space for acoustic isolation and a vented space for pressure equalization and heat dissipation, resolving the contradiction between sealed acoustic performance and thermal management.
Solution Approach 2:
Different regions of the housing have different sealing characteristics. The chamber region maintains complete sealing for acoustic performance, while the plug region provides controlled ventilation for pressure balance and heat dissipation. This local differentiation allows simultaneous achievement of acoustic reliability and thermal management.
2Temperature
If a large vent hole is provided to balance air pressure and dissipate heat, then heat dissipation is improved, but abnormal sounds are generated
Solution Approach 1:
The plug material's elastic modulus and geometric dimensions are optimized to create a vent hole of appropriate size that allows sufficient heat dissipation while restricting airflow velocity to prevent abnormal sounds. The vent hole dimensions are specifically designed to balance thermal management requirements with acoustic quality.
Solution Approach 2:
The plug provides localized ventilation with controlled characteristics. The vent hole in the plug creates a specific flow regime that differs from both completely sealed and fully open configurations, enabling heat dissipation without generating the abnormal sounds associated with large vent holes.
3Temperature
If a plug with vent hole is inserted into the through hole to enable heat dissipation, then heat dissipation is improved, but air tightness may be compromised
Solution Approach 1:
The plug is precisely fitted into the through hole with a specific geometric configuration that maintains air tightness at the interface while the vent hole within the plug provides controlled ventilation. The plug's outer surface geometry ensures sealing contact with the through hole walls, preventing leakage while allowing intended ventilation.
Solution Approach 2:
The plug is made of elastic material that combines sealing properties with venting functionality. The material's elasticity allows it to conform to the through hole geometry for sealing while maintaining the internal vent hole structure for heat dissipation, achieving both air tightness and thermal management.
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
Balances air pressure, allows heat dissipation, and prevents abnormal sounds, thereby improving acoustic performance and extending the service life of the loudspeaker box while simplifying manufacturing.
Implementation Method 1
the vent hole communicates the chamber and a space outside the housing
Implementation Method 2
allows heat dissipation
Implementation Method 3
prevents abnormal sounds
Data Source
AI summary
Disclosed are a closed loudspeaker box, a display device including the closed loudspeaker box, and a method for testing the closed loudspeaker box. The closed loudspeaker box includes: a housing; a chamber surrounded by the housing; a through hole penetrating the housing and communicating with the chamber; and a plug, at least a part of the plug is inserted into the through hole, wherein the plug includes a plug main body and a vent hole penetrating the plug main body, and the vent hole communicates the chamber and a space outside the housing.