Vacuum Cleaner Layout for Low Centre of Gravity and Bag Fill
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Solution Overview
Problem
Suction cleaners with dust collection bags face instability due to a high centre of gravity caused by the overhead motor and cable storage, leading to potential tipping during use, especially when navigating small level differences.
Innovation Solution
The suction cleaner design positions the suction source beneath the dust collection bag compartment and incorporates a cable reel in the lower part of the body, with a manually operable rotary member for winding the cable, to achieve a low centre of gravity and high dust bag fill ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the motor is disposed overhead of the dust collection bag, then the dust bag fill ratio is improved, but the cleaner stability deteriorates due to high centre of gravity
Solution Approach 1:
The motor is inverted from its conventional overhead position to a lower position beneath the dust collection bag compartment. This inversion allows the heavy motor to be positioned low in the cleaner's structure, lowering the centre of gravity and improving stability while still maintaining effective airflow connection to the dust bag through a strategically designed air passage that extends upward to the bag's upper region.
2Ease of operation
If the cable storage is positioned towards the top of the cleaner, then the ease of operation is improved, but the cleaner stability deteriorates due to high centre of gravity
Solution Approach 1:
The cable storage system is transitioned from a vertical upper-positioned arrangement to a horizontal lower-positioned reel mechanism. The cable reel is disposed in the lower part of the cleaner body, and the cable extends upward to an external connection point, effectively utilizing vertical space while keeping the heavy cable storage low. This dimensional reorganization maintains user accessibility while significantly improving stability by lowering the centre of gravity.
3Productivity
If a large collection bag is provided to increase dust-carrying capacity, then the productivity is improved, but the device volume increases requiring more material and storage space
Solution Approach 1:
The airflow path parameters are optimized by extending the air passage upward into the upper region of the dust collection bag compartment. This allows the suction airflow to effectively traverse through a larger portion of the dust bag volume, increasing the utilized dust-carrying capacity without requiring a proportionally larger bag or cleaner body. The modified airflow geometry enables more efficient use of the existing bag volume.
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 allows for a high dust bag fill ratio while reducing the cleaner's centre of gravity, enhancing stability and preventing tipping during use.
Implementation Method 1
a source of suction for causing suction airflow into a bag in the compartment
Implementation Method 2
a dust collection bag, which has porous walls designed to trap dust but allow airflow therethrough
Data Source
AI summary
A suction cleaner (60) comprising a body (50); a compartment (42) for accommodating a dust collection bag (44); and a source of suction (32) for causing suction airflow into a bag in the compartment, wherein the source of suction is disposed at least partially beneath the compartment and communicates therewith by a passage (46) which extends from an upper region of the compartment.