Protective Case With Ultrasonic Airflow for Portable Device Cooling

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Solution Overview

Problem

As electronic devices become smaller and more powerful, traditional cooling methods are inadequate due to space constraints and the need for waterproofing, leading to thermal management issues that can cause performance hits or shutdowns, with protective cases often acting as thermal insulators.

Innovation Solution

A protective case with an integrated airflow generating device that produces ultrasonic air pulses to create net airflow, expelling heat from the device through a housing designed to accommodate portable electronics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If traditional active cooling methods (e.g., fans) are used, then cooling effectiveness is improved, but device space is consumed and waterproofing is compromised

Engineering Contradiction:

Improvecooling effectivenessVSAvoiddevice space

Core Design Contradiction:

TemperatureVSVolume of moving object

Solution Approach 1:

The patent replaces traditional mechanical cooling systems (fans, pumps) with an ultrasonic vibration-based airflow generation system. The ultrasonic airflow generator uses high-frequency mechanical vibrations to directly move air molecules, creating airflow without rotating parts or mechanical moving components, thus eliminating the need for fan assemblies and associated space while maintaining cooling effectiveness

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operating parameters by using ultrasonic frequency vibrations (typically 20-100 kHz) to generate airflow. This fundamental parameter change from mechanical rotation to ultrasonic vibration allows the system to achieve air movement in a compact form factor, resolving the space versus cooling effectiveness contradiction

Inventive Principle:

Principle #35Parameter changes

2Reliability

If protective cases are used, then device protection is improved, but heat dissipation is impeded

Engineering Contradiction:

Improvedevice protectionVSAvoidheat dissipation

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The protective case is designed to perform multiple functions simultaneously: it provides mechanical protection against drops and impacts while also serving as an active thermal management system. The integrated ultrasonic airflow generator enables the case to actively cool the device, transforming the case from a passive protective element to an active cooling system that addresses both protection and heat dissipation needs

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the protective case structure with the airflow generation system by integrating the ultrasonic airflow generator within the case housing. This combination allows the case to simultaneously provide physical protection and active cooling, eliminating the need for separate cooling components and resolving the contradiction between protection and heat dissipation

Inventive Principle:

Principle #5Merging (Combining)

3Volume of moving object

If device size is reduced, then portability is improved, but cooling capability is insufficient

Engineering Contradiction:

Improvedevice sizeVSAvoidcooling capability

Core Design Contradiction:

Volume of moving objectVSTemperature

Solution Approach 1:

The patent replaces bulky mechanical cooling systems with ultrasonic vibration-based airflow generation. The ultrasonic airflow generator produces air movement through high-frequency vibrations of a membrane or diaphragm, eliminating the need for large fan assemblies, heat sinks, and associated mechanical components. This enables effective cooling in a compact form factor suitable for small, portable devices

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent transitions from traditional three-dimensional mechanical cooling structures to a two-dimensional ultrasonic membrane vibration approach. The ultrasonic airflow generator uses a thin vibrating membrane to generate airflow, dramatically reducing the space required for cooling components while maintaining cooling effectiveness, thus enabling portability without sacrificing cooling capability

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 airflow generating device effectively dissipates heat, reducing the likelihood of throttling and allowing devices to maintain or increase power performance without the need for traditional cooling methods.

Implementation Method 1

an airflow generating device, integrated in the housing... producing a net airflow; and causing air to move within a housing

Methodology Applied

Scientific EffectUltrasonic vibration: Ultrasonic Vibration

Data Source

PatentUS20260075750A1Protective Case and Airflow Generating Method Thereof

Publication Date: 2026.03.12 XMEMS LABS INC

AI summary

A protective case and an airflow generating method thereof are disclosed to dissipate heat from a portable electronic device. The protective case includes a housing, adapted to accommodate the portable electronic device, and an airflow generating device, integrated in the housing. By providing external active cooling and protective covering functions, the protective case improves performance and reliability of the portable electronic device without requiring modifications to its internal configuration.