Cyclonic Dirt Separator Layout for Shorter Air Paths and Clear View

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Solution Overview

Problem

Existing cyclonic dirt separators in vacuum cleaners often have tortuous air paths that lead to air leaks and reduced cleaning performance due to the vertical orientation of the suction source, which obstructs the view of the primary cyclone and increases backpressure, and the arrangement of secondary cyclones above the primary cyclone results in a tall unit and obstructed view.

Innovation Solution

A cyclonic dirt separator design with a primary cyclone and secondary cyclones arranged around it, forming gaps to provide an unobstructed view of the primary cyclone, and a working air conduit extending through the cyclone and dirt cup assembly to minimize air path length and reduce pressure losses, with secondary cyclones optionally featuring vortex stabilizers to enhance separation efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If secondary cyclones are arranged above the primary cyclone, then the cyclonic separator achieves effective multi-stage separation, but the unit becomes tall and the view of the primary cyclone is obstructed

Engineering Contradiction:

Improveseparation efficiencyVSAvoidunit height

Core Design Contradiction:

Manufacturing precisionVSLength of stationary object

Solution Approach 1:

The patent transitions from a vertical stacking arrangement (one dimension) to a radial/circumferential arrangement where secondary cyclones are positioned around the primary cyclone in the same horizontal plane. This dimensional change allows multiple cyclones to coexist without increasing height, maintaining compact unit dimensions while achieving effective multi-stage separation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Length of moving object

If the suction source is vertically oriented below the cyclone, then the air path is shortened, but the view of the cyclone operation is obstructed and space is required at the bottom

Engineering Contradiction:

Improveair path lengthVSAvoidviewability

Core Design Contradiction:

Length of moving objectVSEase of operation

Solution Approach 1:

The patent segments the cyclone assembly by positioning the suction source horizontally adjacent to the cyclone rather than vertically below it. This segmentation allows the air intake to be located at the side of the cyclone, shortening the air path while maintaining clear visibility of the cyclone's operational status through the housing.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If a tortuous exhaust air path is used from the cyclone to the suction source, then the components can be arranged compactly, but air leaks occur and cleaning performance is reduced

Engineering Contradiction:

Improvecomponent arrangementVSAvoidairflow integrity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Instead of routing exhaust air through a tortuous path from the cyclone outlet to the suction source inlet, the patent inverts the approach by positioning the suction source horizontally adjacent to the cyclone with direct fluid communication. This reversal of the conventional air path arrangement eliminates multiple bends and connection points, thereby preventing air leaks and maintaining airflow integrity while achieving compact component arrangement.

Inventive Principle:

Principle #13The other way round (Inversion)

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 design allows for improved airflow efficiency, reduced pressure losses, and an unobstructed view of the primary cyclone operation, while maintaining a compact unit size and enhancing separation efficiency through the use of vortex stabilizers in the secondary cyclones.

Implementation Method 1

separating contaminants from an air stream as the air stream travels about the first cyclonic chamber

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

first cyclone having a side wall defining a first cyclonic chamber for separating contaminants from an air stream

Methodology Applied

Scientific EffectCyclone separation: Cyclone Separation

Data Source

PatentUS7651544B1Vacuum cleaner with multiple cyclonic dirt separators and bottom discharge dirt cup

Publication Date: 2010.01.26 BISSELL INC

AI summary

A vacuum cleaner comprises a cyclonic separator having a first cyclone and a plurality of downstream secondary cyclones. The first cyclone comprises a side wall defining a first cyclonic chamber, and the secondary cyclones each comprise a side wall defining a second cyclonic chamber. A dirt cup assembly is mounted below the cyclonic separator to collect contaminants separated in the first and second cyclonic chambers. The secondary cyclones can be arranged around the first cyclone side wall and form a gap between adjacent secondary cyclones so that the first cyclone side wall is exposed at the gap. A working air conduit can extend through the first cyclone and the dirt cup assembly to couple the secondary cyclones to a suction source located below the dirt cup assembly. Furthermore, the secondary cyclones can have a vortex stabilizer.