Vehicle Subwoofer With Side-Mounted Amplifier and Airflow Cooling
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Solution Overview
Problem
The existing speaker systems in vehicles are hindered by the large size and weight of external amplifiers, which occupy valuable space and increase fuel consumption, necessitating a method to integrate the amplifier into the subwoofer unit without altering the existing audio system structure.
Innovation Solution
A speaker unit design that mounts the external amplifier on the side of the subwoofer unit, utilizing a vibration plate to generate airflow for cooling and incorporating a high-strength injection material protection cover, allowing for space savings and weight reduction while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an external amplifier is used to drive the subwoofer unit, then the audio output performance is improved, but the vehicle weight increases and fuel consumption increases
Solution Approach 1:
The amplifier circuit unit is integrated into the subwoofer unit by mounting it on the side surface of the subwoofer frame, combining two previously separate components (amplifier and subwoofer) into a single integrated assembly, thereby reducing overall vehicle weight while maintaining audio output performance
2Power
If an external amplifier is used to drive the subwoofer unit, then the audio output performance is improved, but the vehicle space occupied increases
Solution Approach 1:
The amplifier circuit unit is mounted on the side surface of the subwoofer frame, merging the amplifier and subwoofer into a single integrated unit that occupies the same installation space, thereby freeing up valuable vehicle interior space while maintaining audio output performance
Solution Approach 2:
The amplifier is positioned on the side surface of the subwoofer frame rather than requiring a separate installation location, utilizing the vertical or lateral dimension of the existing subwoofer structure to accommodate the amplifier circuit unit
3Weight of moving object
If an external amplifier is integrated into the subwoofer unit, then the vehicle weight is reduced, but the heat dissipation becomes more challenging
Solution Approach 1:
The vibration plate's up-and-down vibration generates wind flow that automatically cools the amplifier circuit unit, allowing the system to dissipate heat through its own operational movement rather than requiring an external cooling mechanism
Solution Approach 2:
The air flow generated by the vibration plate's operation, which could be considered a byproduct, is converted into a beneficial cooling mechanism for the amplifier circuit unit, effectively using the system's own operation to manage heat dissipation
4Ease of manufacture
If the amplifier circuit unit is mounted on the subwoofer unit, then the manufacturing complexity is reduced, but the amplifier needs protection from vibration and heat
Solution Approach 1:
The amplifier protection cover unit is coupled to the subwoofer frame to cover and protect the amplifier circuit unit, creating a nested structure where the cover encloses the sensitive electronic components within the robust subwoofer assembly, protecting them from vibration and heat while maintaining manufacturing simplicity
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 secures space in vehicles, reduces weight, lowers costs, and improves cooling efficiency, making it suitable for low-cost vehicles with minimal layout changes and simplifying manufacturing, while effectively addressing the challenge of integrating the amplifier within the existing system.
Implementation Method 1
a vibration plate coupled to the subwoofer frame at one side of the subwoofer frame and vibrating up and down to generate sound
Implementation Method 2
The amplifier circuit unit mounted on the subwoofer unit may be cooled by using the wind generated by the vibration of the vibration plate
Implementation Method 3
a magnet coupled to a central portion of the voice coil to vibrate the voice coil up and down using a magnetic force of a permanent magnet
Data Source
AI summary
A speaker unit for a vehicle includes a subwoofer unit for outputting sound in a base sound region, an amplifier (AMP) circuit unit mounted on a side of the subwoofer unit for amplifying an acoustic current signal and supplying the amplified acoustic current signal to the subwoofer unit, and an amplifier protection cover unit coupled to the subwoofer unit at one side of the subwoofer unit and configured to cover the amplifier circuit unit.