Shield Can Ionic Wind Cooling for Compact Electronic Assemblies

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Solution Overview

Problem

Existing electronic devices face challenges in miniaturizing heat dissipation means that generate ionic wind due to the need for separate discharge and ground electrodes, especially in narrow spaces shielded by shielding components, and struggle to efficiently cool heating elements generating high temperatures.

Innovation Solution

An electronic device with a heat dissipation function that integrates a shield can as a collector electrode, eliminating the need for separate electrodes, and uses a wire electrode as an emitter to generate ionic wind, which flows through a continuous heat dissipation space defined by the shield can and electrode mounting part, enhancing convective heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If separate discharge electrode and ground electrode are installed to generate ionic wind, then ionic wind generation is achieved, but device size increases and installation in narrow spaces becomes difficult

Engineering Contradiction:

Improveheat dissipation capabilityVSAvoidheat dissipation means size

Core Design Contradiction:

TemperatureVSVolume of moving object

Solution Approach 1:

The shield can is merged with the ground electrode function, eliminating the need for a separate ground electrode. The shield can serves dual purposes: electromagnetic shielding and ionic wind generation as the ground electrode, thereby reducing the overall device size while maintaining heat dissipation capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shield can is given multiple functions: it acts as both an electromagnetic shielding component and a ground electrode for ionic wind generation. This multi-functionality reduces the number of separate components needed, enabling installation in narrow spaces while achieving effective heat dissipation

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If shield can is installed to block electromagnetic waves, then electromagnetic interference is prevented, but heat dissipation space is narrowed and ionic wind generation becomes difficult

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidheat dissipation implementation

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The shield can is merged with the ground electrode function, allowing electromagnetic shielding and ionic wind generation to coexist in the same component. This integration enables the shield can to serve dual purposes without requiring additional space or components

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shield can serves itself by functioning as both the electromagnetic shielding barrier and the ground electrode for ionic wind generation. This self-service approach eliminates the need for separate components and enables heat dissipation within the constrained space defined by the shield can

Inventive Principle:

Principle #25Self-service

3Temperature

If ionic wind is generated to cool heating element, then heat dissipation is improved, but device complexity increases due to additional electrodes and power modules

Engineering Contradiction:

Improveheating element coolingVSAvoidelectrode and power module configuration

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The shield can is merged with the ground electrode, eliminating one electrode and its associated mounting structure. This reduction in components simplifies the overall device configuration while maintaining ionic wind generation capability for heating element cooling

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shield can performs the ground electrode function without requiring separate installation or configuration. This self-service approach reduces assembly complexity and eliminates the need for additional electrode mounting structures and wiring

Inventive Principle:

Principle #25Self-service

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 miniaturizes the heat dissipation means, improves cooling efficiency by concentrating ionic wind on heating elements, and enhances convective heat transfer without altering the device's design, reducing noise and vibration.

Implementation Method 1

a heat dissipation means provided to be adjacent to the heating element and causing an ionic wind to flow into a shielded space of an inner part of the shield can

Methodology Applied

Scientific EffectIonic wind: Ion Wind

Implementation Method 2

enhancing convective heat transfer

Methodology Applied

Scientific EffectConvective heat transfer: Convection

Data Source

PatentEP3790045B1Electronic device having heat dissipation function

Publication Date: 2025.09.03 LG ELECTRONICS INC

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AI summary

An electronic device having a heat dissipation function is proposed. The electronic device includes: a heating element (20); a shield can (30) covering the heating element (20) to block electromagnetic waves; and a heat dissipation means (50) provided to be adjacent to the heating element (20) and causing an ionic wind to flow into a shielded space (32) of an inner part of the shield can (30). Here, the heat dissipation means (50) includes: a wire electrode (70) provided to be adjacent to an entrance of the shielded space (32) of the shield can (30) and becoming an emitter electrode; and a power module (80) connected to the wire electrode (70) and applying voltage to the wire electrode (70), wherein the shield can (30) is grounded at the same time of being connected to the power module (80) and becomes a collector electrode.