Heat Sink With Internal Ventilation Path For Space-Saving Thermal Management

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Solution Overview

Problem

Conventional heat sinks with protruding fins require large installation spaces and complex manufacturing processes, and omitting fins compromises heat dissipation performance.

Innovation Solution

A heat sink design featuring a plate-shaped base with heat dissipating pieces that include side and top wall parts, creating a ventilation path between the inner and outer spaces for efficient airflow and heat exchange, eliminating the need for external fins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If multiple fins protrude outward from each of the protruding pieces, then heat dissipation performance is improved, but the entire dimension in the horizontal direction becomes large requiring wide installation space

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidinstallation space

Core Design Contradiction:

TemperatureVSArea of stationary object

Solution Approach 1:

The invention transitions from horizontal fin protrusions to vertical/directional airflow paths. The ventilation path extends in the direction from the electronic component contact surface toward the heat dissipating surface, utilizing the vertical dimension rather than horizontal expansion. This allows heat dissipation without increasing horizontal installation space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The ventilation path is nested within the heat sink structure itself, forming an internal channel between the contact surface and heat dissipating surface. This internal pathway eliminates the need for external fins while maintaining heat dissipation functionality through controlled airflow within the compact structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Temperature

If multiple fins with complicated shape are provided, then heat dissipation performance is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidmanufacturing complexity

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The invention extracts the essential heat dissipation function from the complex fin structure and implements it through a simplified ventilation path. By removing the need for multiple complicated fins and retaining only the necessary airflow channel, manufacturing complexity is reduced while heat dissipation performance is maintained through the streamlined design.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of adding complex external fins to enhance heat dissipation, the invention inverts the approach by creating an internal ventilation path that directs airflow efficiently through the structure. This inversion simplifies the external shape while maintaining internal heat dissipation functionality.

Inventive Principle:

Principle #13The other way round (Inversion)

3Ease of manufacture

If fins are omitted to simplify manufacturing and reduce space, then manufacturing complexity and installation space are reduced, but heat dissipation performance deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidheat dissipation performance

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

The ventilation path serves multiple functions simultaneously: it provides structural support, defines the heat dissipation channel, and guides airflow from the electronic component contact surface to the heat dissipating surface. This multi-functionality eliminates the need for separate fin structures while maintaining effective heat dissipation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 design achieves favorable heat dissipation performance while being space-saving and lightweight, effective in both horizontal and vertical orientations, with reduced manufacturing complexity and lower weight compared to conventional designs.

Implementation Method 1

a ventilation path causing an inner space and an outer space to communicate with each other is ensured therebetween

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 2

the opposite side surface as a heat dissipating surface

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS20220167532A1Heat sink and electronic component package

Publication Date: 2022.05.26 KAGA

AI summary

Favorable heat dissipating performances are obtained by a simple and space-saving shape. A base part of which one side surface serves as an electronic component contact surface and the opposite side surface as a heat dissipating surface and two heat dissipating pieces provided on one end side and the other end side in a direction in which the heat dissipating surface continues in the base part are provided, each of the two heat dissipating pieces has a side wall part protruding from the heat dissipating surface and a top wall part protruding from a tip side of the side wall part toward the other heat dissipating piece and ensuring an outer space between the top wall part and the heat dissipating surface, and the two top wall parts are separated such that a ventilation path causing an inner space and the outer space to communicate with each other is ensured therebetween.