Hand Vacuum Uniflow Cyclone Layout to Prevent Inlet 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 reduced performance and increased maintenance.
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, optimizing air flow and dirt collection efficiency by minimizing backpressure and preventing dirt from blocking the inlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cyclone air inlet is positioned in the lower portion of the cyclone, then the structure is simpler, but dirt can block the inlet and reduce cleaning performance
Solution Approach 1:
The patent inverts the conventional cyclone inlet positioning by placing it in the upper portion of the cyclone chamber instead of the lower portion. This inversion prevents dirt accumulation at the inlet, eliminating blockages and maintaining consistent cleaning performance throughout operation.
2Ease of operation
If the cyclone axis extends vertically, then the design follows conventional patterns, but the handle becomes heavy and uncomfortable for handheld use
Solution Approach 1:
The patent employs asymmetric orientation by positioning the cyclone axis horizontally rather than vertically. This asymmetric configuration relocates the cyclone center of gravity away from the handle, distributing weight more favorably and significantly improving handheld comfort and balance.
3Productivity
If the dirt outlet is positioned in the upper portion of the cyclone, then dirt collection is more efficient, but the external dirt collection chamber becomes complex
Solution Approach 1:
The patent positions the dirt outlet in the upper portion of the cyclone chamber and connects it to an external dirt collection chamber, utilizing vertical spatial arrangement. This dimensional configuration enables efficient dirt collection while maintaining a relatively simple external chamber structure through optimized spatial relationships.
4Productivity
If the cyclone inlet is positioned at the front end, then air flow path is shorter, but the overall device length increases
Solution Approach 1:
The patent nests the cyclone chamber within the main body housing, with the cyclone inlet positioned at the front end and the air flow path integrated into the compact overall structure. This nesting arrangement maintains a short air flow path while avoiding excessive device length through efficient spatial integration.
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 enhances air flow efficiency, reduces backpressure, and simplifies dirt collection by allowing dirt to fall into the external chamber, preventing blockages and improving overall cleaning performance.
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
Implementation Method 2
the cyclone air inlet is in an upper portion of the cyclone
Implementation Method 3
the main body housing a suction motor and fan assembly
Data Source
AI summary
A hand vacuum cleaner comprises a main body has a driving handle and houses a suction motor and fan assembly, the suction motor and fan assembly having a suction motor axis of rotation wherein the driving handle has a hand grip portion that extends upwardly and forwardly when the hand vacuum cleaner is oriented with the upper end above the lower end. An air treatment member has a dirt collection region having an openable door provided on a front end of the air treatment member.