Dynamic Ventilation Mechanism for Laptop Thermal Management

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Solution Overview

Problem

As computing devices become smaller and more powerful, thermal management becomes a significant challenge due to increased heat generation, with existing ventilation systems experiencing inefficiencies when the display is closed, leading to recirculation of exhaust air and reduced thermal performance.

Innovation Solution

A dynamic ventilation mechanism that alters airflow direction based on the display's rotational position, blocking outlet vents when closed to redirect exhaust airflow through the hinge and preventing recirculation, thereby improving thermal management by creating a more efficient exhaust path.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the display is closed to protect the screen, then device portability is improved, but exhaust air recirculation occurs through outlet vents causing reduced thermal performance

Engineering Contradiction:

Improvedevice portabilityVSAvoidthermal performance

Core Design Contradiction:

Weight of moving objectVSTemperature

Solution Approach 1:

The outlet vents are designed to be dynamically blocked by the display when closed, rather than being permanently blocked. This dynamic behavior allows the system to maintain portability while automatically preventing exhaust recirculation when the display is in the closed position, thus resolving the thermal performance issue without sacrificing portability.

Inventive Principle:

Principle #15Dynamics

2Length of moving object

If the device is made thinner to improve portability, then device compactness is improved, but thermal management becomes more difficult

Engineering Contradiction:

Improvedevice thicknessVSAvoidthermal management

Core Design Contradiction:

Length of moving objectVSTemperature

Solution Approach 1:

The dynamic vent blocking mechanism allows thinner device design by providing an automatic thermal management solution that requires minimal additional space. When the display closes, it naturally blocks the outlet vents, creating an efficient exhaust path through the hinge area without requiring complex mechanical mechanisms that would increase device thickness.

Inventive Principle:

Principle #15Dynamics

3Temperature

If outlet vents are permanently blocked to prevent exhaust recirculation, then thermal performance is improved, but device compactness and portability are reduced

Engineering Contradiction:

Improvethermal performanceVSAvoiddevice compactness

Core Design Contradiction:

TemperatureVSLength of moving object

Solution Approach 1:

Rather than permanently blocking outlet vents, the system uses the display's natural closing motion to dynamically block the vents only when needed. This maintains device compactness while achieving thermal performance goals, as the blocking mechanism is already inherent in the display-hinge structure rather than requiring additional components.

Inventive Principle:

Principle #15Dynamics

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 solution enhances thermal performance by preventing exhaust air recirculation and maintaining efficient cooling, allowing for more powerful processors, thinner designs, and extended operation times in compact devices.

Implementation Method 1

For forced convection, a computing device may include one or more fans used to move air through the computing device and cool one or more heat generating components of the computing device. The one or more fans pull air through inlet vents and push air out of outlet vents.

Methodology Applied

Scientific EffectForced Convection: Forced Convection

Implementation Method 2

The one or more fans pull air through inlet vents and push air out of outlet vents

Methodology Applied

Scientific EffectPressure Gradient: Pressure Gradient

Implementation Method 3

Heat may be dissipated from a computing device using forced and natural convection, conduction, and radiation as a way of cooling the computing device as a whole and a processor operating within the computing device

Methodology Applied

Scientific EffectConduction (thermal): Conduction (thermal)

Implementation Method 4

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 5

Methodology Applied

Scientific EffectThermal Radiation: Thermal Radiation

Data Source

PatentUS10528100B2Dynamic ventilation mechanism

Publication Date: 2020.01.07 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

Thermal management devices and systems, and corresponding methods of cooling a computing device are described herein. The computing device includes a housing and an airflow management device. The housing includes a plurality of vents. The plurality of vents defines openings through the housing, respectively. The airflow management device is configured to block a first vent of the plurality of vents when the computing device is in a first configuration. The airflow management device is also configured to block a second vent of the plurality of vents when the computing device is in a second configuration.