Heat Radiation Fin Layout for Junction Box Airflow Bypass
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Solution Overview
Problem
Existing electric junction boxes face impaired heat radiation performance due to power input terminals or seat portions hindering air flow along heat radiation fins, necessitating improved heat dissipation designs.
Innovation Solution
A heat radiation body with heat radiation fins configured such that the interval between fins and adjacent walls increases towards one end, guiding air flow around obstacles like seat portions or bolt attachment portions, ensuring efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wall (seat portion) is provided adjacent to heat radiation fins to fix power input terminals, then electrical connection functionality is improved, but air flow along the heat radiation fins is hindered, worsening heat radiation performance
Solution Approach 1:
The patent applies local quality by varying the interval between heat radiation fins at different positions. Specifically, the interval between adjacent heat radiation fins is set to be larger at the end closer to the wall and smaller at the end farther from the wall. This localized variation in fin spacing optimizes air flow characteristics in different regions, allowing efficient heat radiation while accommodating the wall structure for electrical connections.
Solution Approach 2:
The patent changes the geometric parameter of the heat radiation fins by adjusting the intervals between them. The interval between heat radiation fins is set to decrease from the end adjacent to the wall toward the end farther from the wall. This parameter change creates an optimized air flow path that maintains heat radiation efficiency despite the presence of the wall structure.
2Ease of manufacture
If heat radiation fins are provided with uniform intervals, then manufacturing simplicity is improved, but air flow efficiency is worsened when walls are present in the vicinity
Solution Approach 1:
The patent implements local quality by creating non-uniform intervals between heat radiation fins. The interval is specifically designed to be larger near the wall and smaller farther from the wall, optimizing air flow characteristics in different local regions. This localized variation enhances heat dissipation efficiency while remaining manufacturable.
Solution Approach 2:
The patent applies asymmetry by deliberately designing asymmetric intervals between heat radiation fins. Instead of uniform spacing, the intervals are made asymmetric with respect to the wall position, with larger spacing near the wall and smaller spacing farther away. This asymmetric configuration optimizes air flow patterns and heat radiation efficiency in the presence of the wall structure.
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
The design enhances heat radiation performance by minimizing air flow hindrance, allowing efficient heat dissipation even with walls or fixtures in the vicinity of the fins, thus improving the overall thermal management of the box-shaped body.
Implementation Method 1
a plurality of heat radiation fins provided on the base portion and extending in a prescribed extending direction
Implementation Method 2
when air flows from a flow path between the two or more heat radiation fins to the region between the wall and the two or more heat radiation fins
Implementation Method 3
pressure in a region having a large interval is generally lower than pressure in a region having a small interval. Accordingly, the air flows from the region having a small interval toward the region having a large interval
Data Source
AI summary
A heat radiation body that radiates heat generated by a heat source, the heat radiation body includes: a base portion to which the heat is transferred; a plurality of heat radiation fins provided on the base portion and extending in a prescribed extending direction; and a wall adjacent to the plurality of heat radiation fins in the extending direction. The plurality of heat radiation fins includes two or more heat radiation fins configured such that an interval between the heat radiation fins and the wall in the extending direction increases toward one end of the wall in an intersecting direction intersecting the extending direction.