Heat Sink Segmentation for Notebook Thermal Management
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Solution Overview
Problem
High-frequency components in notebook computers experience overheating issues due to inefficient heat dissipation, leading to excessive temperature buildup on the top cover above the heat fin set.
Innovation Solution
An electric device design incorporating a bottom case with air outlets and inlets, a heat sink with a hot-end and cold-end portion, and a fan element that enhances thermal conductivity by circulating airflow to transport heat energy from the hot-end to the cold-end, thereby reducing the temperature of the top cover and surrounding areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan is provided to supply cold air to the heat radiation fin set for dissipating heat energy, then the heat dissipation performance is improved, but the ventilation holes of the bottom case are increasingly heated and the top cover right above the heat radiation fin set becomes overly heated
Solution Approach 1:
The heat sink is divided into two distinct portions: a hot-end portion positioned near the top cover to absorb heat, and a cold-end portion positioned near the air inlet. This segmentation allows different regions of the heat sink to perform different thermal functions, effectively managing the heat distribution and preventing localized overheating of the top cover.
Solution Approach 2:
The heat sink acts as an intermediary thermal management component between the heat radiation fin set and the air inlet. It intercepts heat energy that would otherwise directly heat the top cover, and transports it to the cold-end portion where it can be dissipated by incoming cold air, thus mediating the thermal interaction and preventing harmful overheating.
2Loss of energy
If heat energy is thermally conducted from the fin set to the top cover, then heat transfer occurs, but the top cover becomes overly heated which may cause damage
Solution Approach 1:
The hot-end portion of the heat sink is positioned to contact the top cover before excessive heat accumulation occurs. This preliminary thermal intervention captures heat energy early in the thermal conduction path, preventing it from causing damaging temperature rises in the top cover and thereby protecting the product's reliability.
Solution Approach 2:
The heat energy that would normally be harmful to the top cover is redirected through the heat sink structure. The hot-end portion accepts this potentially harmful heat, and the cold-end portion uses incoming cold air to dissipate it, converting a harmful thermal effect into a beneficial heat dissipation process that protects the top cover.
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 solution effectively decreases the surface temperatures of the heat sink, fin set, and top cover, preventing overheating and potentially increasing the product life of the electric device by improving thermal conductivity and heat dissipation.
Implementation Method 1
The fan element draws airflows into the bottom case from the air inlet so as to cool the fin set and the hot-end portion
Implementation Method 2
the heat energy on the top cover can be thermally conducted to the cold-end portion of the heat sink from the hot-end portion thereof
Implementation Method 3
the airflows carry a part of the heat energy on the heat sink so as to accelerate the heat energy transported from the hot-end portion of the heat sink to the cold-end portion thereof
Data Source
AI summary
An electric device provided includes a bottom case having an air outlet and an air inlet, a top cover combined with the bottom case, a fin set, a heat sink having a cold-end portion and a hot-end portion being opposite to each other, and a fan element. An accommodation space is defined between the bottom case and the top cover. The fin set is disposed in the accommodation space. The heat sink is disposed in the accommodation space, and the cold-end portion is adjacent to the air inlet, and the hot-end portion thereof is attached on a projection zone from the fin set to the top cover. The fan element draws airflows into the bottom case from the air in let for cooling the fin set and the hot-end portion.