Hand Vacuum Cyclone Layout to Prevent Inlet Dirt Blockage

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Solution Overview

Problem

Existing surface cleaning apparatus, such as hand vacuum cleaners, often face inefficiencies in air flow and dirt collection due to cyclone axis orientation and dirt outlet placement, leading to potential blockages and reduced performance when used at various angles.

Innovation Solution

A hand vacuum cleaner design featuring a uniflow cyclone with a front air inlet and rear air outlet, where the cyclone axis extends rearwardly, and a dirt collection chamber positioned externally below the cyclone, allowing for horizontal cyclone axis orientation and improved air flow efficiency by reducing bends in the air path and preventing dirt from blocking the inlet.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the cyclone axis is oriented vertically with the inlet at the bottom, then the structure is simple and compact, but dirt can accumulate and block the inlet when used at various angles

Engineering Contradiction:

Improvecyclone structureVSAvoidinlet blockage prevention

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The cyclone inlet is positioned asymmetrically at the upper portion of the cyclone chamber rather than at the bottom, creating an asymmetric flow pattern that prevents dirt accumulation and blockages when the device is used at various angles

Inventive Principle:

Principle #4Asymmetry

2Ease of manufacture

If the cyclone air inlet is positioned at the lower portion, then the structure is easier to manufacture, but air flow efficiency decreases due to additional bends in the air path

Engineering Contradiction:

Improvecyclone structureVSAvoidair flow efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The cyclone air inlet is inverted to the upper portion of the cyclone chamber, reversing the conventional lower inlet position. This inversion creates a more direct air flow path with fewer bends, improving air flow efficiency and cyclone performance

Inventive Principle:

Principle #13The other way round (Inversion)

3Volume of moving object

If the dirt collection chamber is integrated inside the cyclone chamber, then the device is more compact, but dirt can block the cyclone inlet and reduce performance

Engineering Contradiction:

Improvedevice sizeVSAvoidcleaning performance

Core Design Contradiction:

Volume of moving objectVSProductivity

Solution Approach 1:

The dirt collection chamber is segmented and positioned externally below the cyclone chamber rather than being integrated inside. This segmentation prevents dirt from blocking the cyclone inlet while maintaining a compact overall device size through strategic spatial arrangement

Inventive Principle:

Principle #1Segmentation

4Productivity

If the cyclone axis extends horizontally, then air flow bends are reduced and efficiency is improved, but the device becomes less stable when held vertically

Engineering Contradiction:

Improveair flow efficiencyVSAvoiddevice stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The cyclone chamber is designed with a horizontal axis orientation optimized for air flow efficiency, while the overall device structure incorporates vertical stability features through strategic component placement and housing design, allowing each part to have its optimal orientation

Inventive Principle:

Principle #3Local quality

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

Enhances cleaning efficiency by maintaining unobstructed air flow and preventing dirt accumulation at the cyclone inlet, ensuring consistent performance regardless of the device's orientation and reducing the need for frequent emptying of the dirt collection chamber.

Implementation Method 1

a cyclone unit comprising a cyclone having a cyclone axis of rotation, a front end having a cyclone air inlet and a longitudinally spaced apart rear end having a cyclone air outlet

Methodology Applied

Scientific EffectCyclone separation: Cyclone Separation