Set-Top Box Vent Housing to Prevent Airflow Blockage

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Solution Overview

Problem

Set-top boxes (STBs) face challenges in maintaining adequate airflow and preventing vent blockage, which can lead to overheating and reduced performance, especially when stacked or placed in configurations that obstruct air flow paths.

Innovation Solution

The design incorporates strategically positioned vents with elevational differences and arched or curved surfaces to prevent blockage, ensuring air flow in both horizontal and vertical orientations, along with features like feet and stands for stability and ventilation, and materials that allow for effective convection cooling without the need for internal fans.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If vents are placed on the housing surface, then airflow can be provided for cooling, but the vents may be blocked by objects placed on the housing

Engineering Contradiction:

Improvecooling effectivenessVSAvoidvent blockage prevention

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent introduces a third dimension (elevation/depth) to the vent design by creating recessed areas or cavities in the housing surface. Objects placed on the housing rest on the elevated outer rim and cannot block the vents located in the recessed area below, thus maintaining airflow while preventing blockage.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the STB is designed to accommodate both horizontal and vertical orientations, then versatility is improved, but stability and vent accessibility may be compromised

Engineering Contradiction:

Improveorientation flexibilityVSAvoiddevice stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent employs asymmetric design elements including feet positioned at specific locations and an outer rim structure that provides different support characteristics for horizontal versus vertical orientations. This asymmetric configuration ensures stability in both orientations while maintaining consistent vent accessibility through the elevated rim design.

Inventive Principle:

Principle #4Asymmetry

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 ensures reliable operation at elevated temperatures, prevents overheating, and maintains performance even with accidental vent blockage, while also enhancing the aesthetic appeal and durability of the STBs, ensuring they can withstand various environmental conditions and usage scenarios.

Implementation Method 1

The elevated outer rim may prevent objects from blocking vents to the interior, thereby maintaining airflow

Methodology Applied

Scientific EffectAirflow: Convection

Implementation Method 2

The front side may be curved or arched inwardly from side to side and/or outwardly from top to bottom

Methodology Applied

Scientific EffectPhysical protection through curved surface geometry:

Data Source

PatentUS8009426B2Housing for protecting electronic components having vents

Publication Date: 2011.08.30 COMCAST CABLE COMM LLC

AI summary

Settop box (STB) or other housing for use in protecting electronic components. The housing may include an interior portion for protecting the components. The housing may include feet on a bottom and side to facilitate stabilizing the STB in a vertical and horizontal position. The housing may include vents to facilitate air flow to the interior. The vents may be associated with blocking aspects to protect against blocking the vents.