Passive Mesh Network Thermal Layout for IC and Speaker Heat
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Solution Overview
Problem
Mesh network devices, especially those with small form-factors and voice assistants, face challenges in dissipating heat generated by electronic subsystems like IC devices and speaker modules, making active thermal-control systems unfeasible due to form-factor and power consumption considerations.
Innovation Solution
A passive thermal-control system is integrated into the mesh network device, utilizing a heat sink and multiple heat spreaders to transfer heat from IC devices and speaker modules to housing components, where it is dissipated to the external environment through conduction, convection, and radiation mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an active thermal-control system (circulating coolant or liquid) is used to dissipate heat from electronic subsystems, then heat dissipation effectiveness is improved, but form-factor size and power consumption increase
Solution Approach 1:
The patent extracts the working fluid from the thermal control system, using phase change material (paraffin wax) that melts and solidifies in place within the heat sink structure. This eliminates the need for pumps, tubes, and circulation mechanisms, dramatically reducing system volume while maintaining effective heat dissipation through the phase change process
Solution Approach 2:
The patent replaces the mechanical active cooling system (pumps, fans, circulating fluids) with a passive thermal management system utilizing phase change material. The phase change process automatically absorbs and releases heat without mechanical intervention, eliminating moving parts and reducing system complexity and size
2Temperature
If an active thermal-control system (circulating coolant or liquid) is used to dissipate heat from electronic subsystems, then heat dissipation effectiveness is improved, but power consumption increases
Solution Approach 1:
The phase change material serves itself by automatically melting when heat is generated by electronic components and solidifying when heat is released to the environment. This self-regulating process requires no external power source, eliminating the energy consumption associated with pumps, fans, and control systems while maintaining effective thermal management
Solution Approach 2:
The patent replaces energy-consuming mechanical cooling systems with a passive phase change system. The phase change material naturally absorbs heat during melting and releases it during solidification without requiring electrical power, dramatically reducing overall system power consumption
3Adaptability or versatility
If multiple heat-generating electronic subsystems are integrated into a small form-factor device, then device functionality and aggregate performance are improved, but thermal management difficulty increases
Solution Approach 1:
The patent merges multiple heat dissipation functions into a single integrated heat sink structure containing phase change material. This unified structure simultaneously manages heat from multiple electronic subsystems (IC devices, speaker module, voice assistant components) through one passive thermal management system, simplifying the overall thermal control architecture
Solution Approach 2:
The phase change material heat sink serves multiple functions: it cools IC devices on the PCB, dissipates heat from the speaker module, and manages thermal loads from voice assistant components. This universal thermal management approach handles diverse heat sources with a single system, reducing complexity
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 solution effectively maintains a desired thermal profile, preventing degradation of electronic subsystems by efficiently dissipating heat, as demonstrated by maintaining surface temperatures and junction temperatures within safe thresholds.
Implementation Method 1
heat originating with IC devices populating a PCB of the mesh network device and a speaker module of the mesh network device may be transferred to other components of the mesh network device, such as a housing component of the mesh network device. The heat may then be dissipated to an external environment
Implementation Method 2
The heat may then be dissipated to an external environment to maintain a desired thermal profile of the mesh network device
Implementation Method 3
The heat may then be dissipated to an external environment to maintain a desired thermal profile of the mesh network device
Data Source
AI summary
This document describes a passive thermal-control system that is integrated into a mesh network device. The passive thermal-control system, which may include a heat sink and multiple heat spreaders, is such that heat originating with integrated circuit devices of the mesh network device and a speaker module of the mesh network device may be transferred to other components of the mesh network device, such as a housing component of the mesh network device. The heat may then be dissipated to an external environment to maintain a desired thermal profile of the mesh network device.