Speaker Voice Coil Cooling via Circumferential Air Gap
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Solution Overview
Problem
Existing speaker designs with heat dissipation grooves suffer from inadequate heat dissipation, uneven heat distribution, and increased air noise due to narrow, shallow grooves, which also incur higher processing costs.
Innovation Solution
A speaker design featuring a support body with a gap between its components that faces the voice coil over its entire circumference, eliminating the need for grooves and allowing for efficient heat dissipation and reduced air noise by creating a large air passage for airflow around the voice coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipation grooves are formed in the plate or spacer, then heat dissipation is attempted, but the grooves are narrow and shallow resulting in insufficient heat dissipation effect
Solution Approach 1:
The invention divides the heat dissipation function into multiple radial grooves on the plate, where each groove acts as an independent heat dissipation channel. This segmentation allows heat to be dissipated through multiple parallel paths simultaneously, improving overall heat dissipation effectiveness while maintaining reasonable groove dimensions.
Solution Approach 2:
The invention extends the heat dissipation structure from a two-dimensional surface to a three-dimensional configuration by creating grooves that extend radially from the center outward. This dimensional change increases the heat dissipation surface area and creates airflow channels that enhance convective heat transfer from the voice coil to the surrounding environment.
2Temperature
If multiple narrow grooves are formed for heat dissipation, then heat dissipation channels are created, but heat is dissipated unevenly between groove regions and non-groove regions
Solution Approach 1:
The invention applies different structural characteristics to different regions of the plate: grooves are created in specific radial regions to enhance heat dissipation locally, while the spaces between grooves maintain structural integrity. This local differentiation allows optimized heat dissipation in groove regions while preserving overall structural strength and achieving more uniform heat distribution across the entire plate surface.
3Temperature
If narrow grooves are used for heat dissipation, then heat dissipation channels are provided, but air suction noise and air discharge noise increase when the vibrating plate vibrates
Solution Approach 1:
The invention creates a dynamic heat dissipation system where the grooves are positioned and dimensioned to work effectively with the natural vibration of the plate. The groove configuration allows air to flow smoothly during plate vibration, reducing turbulence and noise generation while maintaining effective convective heat transfer. The grooves act as controlled airflow channels that adapt to the dynamic motion of the vibrating plate.
4Temperature
If multiple grooves are formed in the plate or spacer, then heat dissipation channels are created, but processing cost increases
Solution Approach 1:
Instead of creating excessive complex cooling structures, the invention uses a moderate number of radially arranged grooves that provide sufficient heat dissipation capability. This partial action approach achieves adequate heat dissipation performance without over-engineering the structure, thereby controlling manufacturing complexity and processing costs while meeting the heat dissipation requirements.
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 design achieves effective heat dissipation and reduces air noise by ensuring airflow around the voice coil over its entire circumference, preventing uneven heat distribution and minimizing noise leakage.
Implementation Method 1
heat generated by a voice coil
Implementation Method 2
heat that accumulates in a space around the voice coil is dissipated outward through the grooves
Data Source
AI summary
A speaker includes spacers that are disposed between a front end portion of a top yoke, which serves as a first member, and a back end portion of a back portion of a frame, which serves as a second member, to form a gap that defines an air passage. When a bobbin and a vibrating plate vibrate in a front-back direction, an airflow through the air passage, which faces a voice coil, is formed between the space around a magnetic gap and the outside. Accordingly, the voice coil is cooled over the entire circumference thereof.