Loudspeaker Diaphragm Cooling for Compact Sound Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sound emitting devices face limitations in heat dissipation due to their miniaturization and high functionality, as passive heat dissipation mechanisms are insufficient for maintaining performance, especially when the external surface area is restricted.
Innovation Solution
Implementing an active heat dissipation mechanism using a loudspeaker, where a temperature sensor and central processing unit generate an inaudible periodic audio signal to drive the loudspeaker's vibration diaphragm for air flow management, enhancing heat dissipation by exhausting heated air and inhaling cool air through a sound hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive heat dissipation mechanism is used, then device structure is simple, but heat dissipation efficacy is insufficient
Solution Approach 1:
The loudspeaker is designed to perform dual functions: audio output and active heat dissipation. The vibration diaphragm generates airflow that exhausts heated air from the device interior through the sound hole, transforming a single-function component into a multi-functional one that simultaneously handles sound emission and thermal management
Solution Approach 2:
The system transitions from static passive heat dissipation to dynamic active heat dissipation. The vibration diaphragm of the loudspeaker dynamically generates periodic airflow to actively exhaust heated air, allowing the heat dissipation mechanism to adapt and respond to thermal conditions rather than relying on static convection
2Area of stationary object
If external surface area is increased for heat dissipation, then heat dissipation efficacy is improved, but device size increases
Solution Approach 1:
The invention shifts heat dissipation from a two-dimensional surface-based approach to a three-dimensional volumetric approach. Instead of relying on external surface area for convection, the system uses the loudspeaker's vibration diaphragm to generate periodic airflow that actively exhausts heated air from the device's internal volume, enabling effective heat dissipation without increasing external dimensions
3Productivity
If active heat dissipation using loudspeaker is implemented, then heat dissipation efficacy is enhanced, but device complexity increases
Solution Approach 1:
The loudspeaker serves dual purposes as both an audio output device and an active heat dissipation mechanism. The vibration diaphragm generates airflow during normal operation to exhaust heated air, eliminating the need for separate active cooling components and reducing overall system complexity despite the enhanced heat dissipation capability
Solution Approach 2:
The loudspeaker's normal audio operation inherently generates the mechanical vibration needed for heat dissipation. The vibration diaphragm automatically creates periodic airflow that exhausts heated air without requiring additional power consumption or separate control mechanisms, allowing the component to serve its own heat dissipation needs
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 approach effectively increases heat dissipation efficacy even with limited external surface area, improving device performance by actively managing airflow for enhanced cooling without affecting the device's audible functionality.
Implementation Method 1
the vibration diaphragm generates a periodic air flow so as to exhaust the heated air
Implementation Method 2
The temperature sensor detects a temperature of the sound emitting device and generates a detection signal
Implementation Method 3
The signal amplifier is connected to and disposed between the central processing unit and the loudspeaker for amplifying the default audio signal
Data Source
AI summary
A sound emitting device includes a speaker box, a loudspeaker, a temperature sensor, a central processing unit and a signal amplifier. The speaker box includes a sound hole. The temperature sensor detects a temperature of the sound emitting device and generates a detection signal. The central processing unit pre-stores a default audio signal. When the central processing unit determines that the loudspeaker is in a standby state and the temperature of the sound emitting device exceeds a threshold value, the central processing unit issues the default audio signal. The signal amplifier is connected to and disposed between the central processing unit and the loudspeaker for amplifying the default audio signal and transmitting the amplified default audio signal to the loudspeaker. A vibration diaphragm of the loudspeaker undergoes a vibration action according to the amplified default audio signal.