Surface cleaning apparatus
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Solution Overview
Problem
Existing hand vacuum cleaners face challenges in efficiently cleaning the air treatment components, such as momentum separators and cyclones, which can lead to reduced performance and increased maintenance complexity due to clogged filters and dirt accumulation.
Innovation Solution
The hand vacuum cleaner design incorporates a movable front door that concurrently opens both the momentum separator and cyclone chambers, allowing for simultaneous cleaning and emptying of dirt, along with wipers that travel across the porous substrates to remove dirt and restore filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate opening mechanisms are used for momentum separator and cyclone chambers, then each chamber can be independently accessed, but the device complexity and maintenance time increase
Solution Approach 1:
The patent combines the opening mechanisms of the momentum separator chamber and cyclone chamber into a single front door assembly. When the front door is opened, both chambers are simultaneously accessed, eliminating the need for separate opening mechanisms and reducing structural complexity while maintaining independent access capability.
Solution Approach 2:
The front door serves multiple functions: it acts as the closure for both the momentum separator chamber and cyclone chamber, and its single opening operation provides simultaneous access to both chambers for maintenance. This multi-functional design reduces the number of components and simplifies the overall structure.
2Reliability
If wipers are added to clean porous substrates, then filtration efficiency is restored, but the device complexity increases
Solution Approach 1:
The wiper system is designed to be automatically actuated when the front door is opened, using the door's movement itself to drive the wiper mechanism. This self-service approach cleans the porous substrates during the normal maintenance opening operation without requiring separate power sources or control systems, thus restoring filtration efficiency while minimizing additional complexity.
Solution Approach 2:
The wipers are positioned and configured to automatically contact and clean the porous substrates as soon as the front door begins to open. This preliminary cleaning action occurs during the maintenance access operation itself, restoring filtration efficiency before the user fully accesses the chambers, without requiring separate cleaning cycles or additional operational steps.
3Loss of time
If concurrent opening of both chambers is implemented, then maintenance time is reduced, but the mechanical complexity of the door system increases
Solution Approach 1:
The patent merges the door mechanisms for both chambers into a single integrated front door assembly. This unified structure allows simultaneous opening of both the momentum separator chamber and cyclone chamber through a single user action, reducing maintenance time while the integrated design keeps the mechanical complexity manageable through component sharing.
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 design enhances the cleaning efficiency of air treatment components, reduces user effort in maintenance, and ensures continuous operation by allowing for easy removal and cleaning of dirt from the air treatment system.
Implementation Method 1
an upstream momentum separator
Implementation Method 2
a downstream cyclone separator
Data Source
AI summary
A hand vacuum cleaner has an air treatment chamber comprising an air inlet, an air outlet, a front end comprising a front door and a rear end. The front door is moveable between an open position in which the air treatment chamber is opened and a closed position. The air treatment chamber further comprises a stationary portion and a moveable portion, the moveable portion is moveable with respect to the stationary portion between an open position in which the air treatment chamber is opened and a closed position.