Nested Filter Unit Design to Reduce Cleaner Length

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Solution Overview

Problem

Existing cyclone dust collection units in cleaners face challenges in reducing the overall length of the cleaner due to the design of the filter unit, which often results in an increase in the length of the cleaner.

Innovation Solution

The filter unit incorporates a filter portion and a dust blocking portion that overlap in a side view, with the dust blocking portion being partially or fully inside the filter portion, effectively blocking dust from entering the filter and reducing the overall length of the unit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the filter unit is designed with a conventional sequential arrangement, then the dust blocking function and filtration function are achieved, but the length of the cleaner increases

Engineering Contradiction:

Improvedust blocking functionVSAvoidlength of cleaner

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The dust blocking portion is positioned inside the filter portion, creating a nested configuration where the dust blocking function and filtration function are achieved in a compact, overlapping arrangement that reduces the overall length of the cleaner

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If the filter portion and dust blocking portion are arranged sequentially, then dust collection efficiency is maintained, but the device complexity increases

Engineering Contradiction:

Improvedust collection efficiencyVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The filter portion and dust blocking portion are merged into a single integrated filter unit with an overlapping configuration, combining multiple dust collection functions into one compact structure that reduces overall device complexity

Inventive Principle:

Principle #5Merging (Combining)

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 configuration suppresses the increase in length of the filter unit and the cleaner, allowing for a more compact design while maintaining effective dust collection efficiency.

Implementation Method 1

a dust blocking portion (52F) that blocks dust fed to the filter portion (51)

Methodology Applied

Scientific EffectPhysical blocking:

Implementation Method 2

a filter portion (51) through which air is allowed to pass

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS20260007286A1Filter unit and cleaner

Publication Date: 2026.01.08 MAKITA CORP

AI summary

A filter unit includes a filter portion and a dust blocking portion that blocks dust fed to the filter portion. In a side view of the filter portion, the filter portion and at least a part of the dust blocking portion overlap with each other.