Passive Thermal Management for Compact Network Cameras Without Fans
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Solution Overview
Problem
Compact electronic devices, such as network-connected cameras, face challenges in dissipating heat generated by computational and communication processes without using fans, as they cannot accommodate traditional heat dissipation mechanisms like cooling fans and heat sinks due to their form factor, which can lead to performance degradation of heat-sensitive components.
Innovation Solution
The implementation of a passively-cooled electronic device using two separate sets of thermally conductive parts within a compact housing to conduct heat away from heat-sensitive assemblies without fans, where these parts are thermally isolated from each other and mechanically support the electronic assemblies, creating multiple heat conduction paths to efficiently dissipate heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional heat dissipation mechanisms (cooling fans and heat sinks with extended fin structures) are used, then heat dissipation effectiveness is improved, but device compactness deteriorates
Solution Approach 1:
The housing is divided into multiple sections with different thermal properties: a first section with high thermal conductivity for heat dissipation and a second section with low thermal conductivity for thermal insulation. This segmentation allows the device to dissipate heat effectively from heat-generating components while protecting heat-sensitive components, all within a compact form factor without requiring traditional fans or extended fin structures.
Solution Approach 2:
Different regions of the housing are assigned different thermal characteristics tailored to their specific functions. The first section (high thermal conductivity) is positioned to conduct heat away from heat-generating electronic assemblies, while the second section (low thermal conductivity) is positioned to thermally isolate heat-sensitive electronic assemblies. This local differentiation of thermal properties enables effective thermal management in a compact device.
2Adaptability or versatility
If computational and communication capabilities are increased, then device functionality is improved, but heat generation increases
Solution Approach 1:
The housing is divided into multiple sections with different thermal properties: a first section with high thermal conductivity for heat dissipation and a second section with low thermal conductivity for thermal insulation. This segmentation allows the device to dissipate heat effectively from heat-generating components while protecting heat-sensitive components, all within a compact form factor without requiring traditional fans or extended fin structures.
Solution Approach 2:
The housing acts as an intermediary thermal management system between heat-generating and heat-sensitive electronic assemblies. By incorporating sections with different thermal conductivities, the housing mediates heat transfer, allowing computational and communication capabilities to be increased without proportionally increasing the impact of heat generation on sensitive components.
3Temperature
If heat dissipation mechanisms are added to compact devices, then heat management is improved, but device complexity increases
Solution Approach 1:
The housing serves multiple functions: it provides mechanical support for electronic assemblies, defines the device form factor, and simultaneously acts as a thermal management system through its differentiated thermal conductivity sections. This multi-functionality eliminates the need for separate heat dissipation mechanisms, maintaining device compactness while improving heat management and avoiding increased complexity.
Solution Approach 2:
The thermal management function is merged with the housing structure itself rather than being implemented as a separate system. The housing combines mechanical support and thermal management roles, with different sections optimized for different thermal requirements, thereby improving heat management without adding structural complexity or requiring additional components.
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 manages heat dissipation in compact electronic devices, preventing performance degradation by directing heat away from sensitive components, thus maintaining operational efficiency and supporting the mechanical structure of the device without interfering with its intended functions.
Implementation Method 1
The first plurality of thermally conductive parts are coupled between the first electronic assembly and the housing, and are configured to create a first plurality of heat conduction paths to conduct the heat generated by the first electronic assembly away from the second electronic assembly without using a fan
Data Source
AI summary
This application is directed to a passively-cooled electronic device including a housing, a plurality of electronic assemblies and a plurality of thermally conductive parts. The electronic assemblies are enclosed in the housing, and include a first electronic assembly and a second electronic assembly. The first and second electronic assemblies are disposed proximately to each other within the housing, and the second electronic assembly is substantially sensitive to heat, including heat generated by operation of the first electronic assembly. The thermally conductive parts are coupled between the first electronic assembly and the housing, and configured to create a first plurality of heat conduction paths to conduct the heat generated by the first electronic assembly away from the second electronic assembly without using a fan. At least a subset of the thermally conductive parts mechanically supports one or both of the first and second electronic assemblies.