Duct Structure for Sealed Electronic Component Cooling
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Solution Overview
Problem
In closed electronic housings, especially in limited spaces like active radar sensor devices, efficient heat dissipation is challenging without active ventilation, as traditional cooling methods require power or increase production costs and space constraints.
Innovation Solution
A duct structure within the housing allows air or medium circulation externally, acting as a heat sink and utilizing natural convection through channels and fins to dissipate heat, potentially incorporating heat pipes and ventilation devices for enhanced cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a closed housing is used to shield electronic components from environmental influences, then protection from environmental factors is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent introduces a duct structure that passes through the housing, creating a third-dimensional heat dissipation pathway. The duct extends from an exterior surface through the housing to an interior surface, enabling heat transfer in the depth dimension rather than just along the exterior surface, thus resolving the contradiction between sealed protection and heat dissipation.
Solution Approach 2:
The duct structure acts as an intermediary heat transfer medium between the electronic component and the external environment. It provides a controlled thermal pathway that allows heat to escape from the sealed housing interior to the exterior without compromising the environmental seal, mediating between the conflicting requirements of protection and cooling.
2Temperature
If active ventilation is used to improve heat dissipation, then cooling effect is improved, but power consumption increases
Solution Approach 1:
The duct structure enables self-service cooling by utilizing natural convection currents and temperature-driven air flow. The system serves its own cooling needs passively through the duct's thermal conductivity and the natural movement of air caused by temperature differences, eliminating the requirement for external power sources or active ventilation components.
3Temperature
If thermoelectric or compression-based air conditioners are used for cooling, then heat dissipation is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential cooling function from complex active systems (thermoelectric coolers, compression-based air conditioners) and implements it through a simplified passive duct structure. By removing unnecessary complex components and retaining only the fundamental heat transfer pathway, the solution achieves cooling without the associated complexity and cost.
Solution Approach 2:
The invention replaces mechanical cooling systems (compressors, fans, active pumps) with a passive thermal conduction system. The duct structure relies on thermal conduction through its walls and natural convection in the surrounding air, substituting complex mechanical active cooling with simpler thermal physics-based passive cooling.
4Temperature
If components are placed in immediate contact with outside walls for heat dissipation, then cooling effect is improved, but available space for other components deteriorates
Solution Approach 1:
The duct structure creates an additional heat dissipation surface by extending through the housing depth. This allows heat dissipation to occur along the duct's exterior surface and at both its entry and exit points, effectively adding volumetric heat dissipation capacity without consuming additional horizontal space, thus resolving the space constraint.
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 provides cooling in sealed environments by increasing the housing's surface area for heat dissipation, enabling efficient heat removal even in power-constrained or spatially restricted conditions, suitable for high-performance electronic components.
Implementation Method 1
The duct structure is configured to admit a circulation of air, or of another medium (like e.g. water) in the environment of the housing, through the duct structure
Implementation Method 2
By means of the circulation of air, the duct structure provides a cooling effect for the electronic component. Effectively the duct structure acts as a heat sink for heat produced in the housing during operation of the electronic component
Data Source
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Figure 5
AI summary
A closed housing (100) for an electronic component (50) comprises a duct structure (110). The duct structure (110) passes through the housing (100), and has a surface (112) on an interior side of the housing (100) for attaching the electronic component (50). The duct structure (110) is configured to admit a circulation of air from an environment of the housing (100) through the duct structure (110). The air does not enter the housing (100). By the circulation of air, a cooling effect is provided for the electronic component (50).