Nested Heat Sink and Radial Fan Channels for Compact Hob Cooling
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Solution Overview
Problem
Existing household appliances, such as hobs, face challenges in achieving effective cooling due to inefficient heat dissipation and pressure differences that lead to friction and reduced cooling effectiveness.
Innovation Solution
The integration of a fan unit partially surrounded by a heat sink unit, with closely arranged heat sinks and radial fans, forms multiple cooling channels of varying lengths and directions, enhancing heat dissipation and reducing pressure differences, thereby improving cooling efficiency without the need for additional guide channels or heat transport means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fan unit is locally separated from or arranged laterally on the heat sink unit, then the device complexity is reduced and assembly is simplified, but the cooling efficiency is insufficient due to inadequate heat dissipation
Solution Approach 1:
The fan unit is at least partially surrounded by the heat sink unit, creating a nested configuration where the fan is positioned within the heat sink structure. This nesting arrangement maximizes the heat sink surface area surrounding the fan, improving heat dissipation efficiency while maintaining a compact design without requiring separate lateral arrangements
2Temperature
If additional guide channels or heat transport means are used to improve cooling, then the cooling efficiency is enhanced, but the device complexity and assembly difficulty increase
Solution Approach 1:
The heat sink unit's own structure serves as the cooling channel system. The multiple heat sinks arranged around the fan create inherent cooling pathways without requiring additional guide channels or heat transport means. The heat sink fins and structure naturally guide airflow and dissipate heat, making the system self-sufficient for cooling functions
3Device complexity
If the fan unit and heat sink unit form fewer cooling channels, then the device complexity is reduced, but pressure differences increase leading to friction losses and reduced cooling effectiveness
Solution Approach 1:
The heat sink unit comprises multiple heat sinks (at least two) arranged around the fan, creating multiple segmented cooling channels. This segmentation divides the cooling flow path into several parallel channels, reducing pressure differences and friction losses in each individual channel while maintaining overall cooling effectiveness
4Manufacturing precision
If all cooling channels have the same length, then the manufacturing precision is improved, but the cooling efficiency is reduced due to inability to handle different heat emission levels
Solution Approach 1:
The cooling channels have different lengths tailored to the specific heat emission requirements of different power components. Heat sinks positioned to cool components with higher heat emission have longer cooling channels, while those for lower heat emission components have shorter channels. This local customization of channel length optimizes cooling efficiency for each component's specific thermal load
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 configuration achieves enhanced cooling efficiency, reduces average temperatures, and allows for a compact design, while also simplifying assembly and cooling power components, thus addressing the limitations of existing cooling systems.
Implementation Method 1
the heat sink unit has at least two heat sinks... the heat sink unit is intended to cool power components of different electronic boards
Implementation Method 2
the fan unit has at least one, in particular exactly one, radial fan... the fans of a fan unit are intended to generate at least one common fluid flow
Data Source
Figure 1
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AI summary
The device (10a) has a ventilator unit (30a) partially surrounded by a cooling body unit (20a). The cooling body unit is provided with two cooling bodies (22a, 24a). The ventilator unit is provided with a radial ventilator. The ventilator unit and the cooling body unit form cooling channels of different lengths. The ventilator unit and the cooling body unit are arranged in a radial symmetrical manner. The cooling body unit is directly connected with power components (46a) e.g. rectifier bridges and IGBTs. Channel units (50a, 52a) guide fluid emerging from the cooling body unit.