Hand Vacuum Cleaner Wiper Mechanism for Automatic Filter Maintenance
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Solution Overview
Problem
Conventional hand vacuum cleaners lack efficient mechanisms for simultaneously cleaning the air treatment chambers and porous dirt separators, leading to reduced filtration capacity and increased user effort in maintenance.
Innovation Solution
The hand vacuum cleaner design incorporates a movable air treatment chamber with integrated wipers that clean the porous dirt separators and cyclone chambers concurrently, allowing for simultaneous emptying and maintenance without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional hand vacuum cleaners use separate mechanisms for cleaning air treatment chambers and porous dirt separators, then device complexity is reduced, but maintenance time and user effort increase
Solution Approach 1:
The patent combines the cleaning functions for the air treatment chamber and porous dirt separator into a single integrated mechanism. When the user opens the front door, both the air treatment chamber and the porous dirt separator are simultaneously accessed and cleaned by wipers that operate concurrently, eliminating the need for separate maintenance operations.
Solution Approach 2:
The wiper mechanism automatically cleans the porous dirt separator as the front door opens, providing self-service cleaning without requiring manual intervention. The wiper is driven by the door opening motion itself, converting the user's opening action into an automatic cleaning function that maintains the separator without additional time or effort.
2Ease of operation
If the air treatment chamber is made openable for maintenance, then ease of operation is improved, but reliability may worsen due to potential misalignment or damage
Solution Approach 1:
The wiper mechanism performs preliminary cleaning of the porous dirt separator before the user completes the opening action. This preliminary action prevents dirt from interfering with the opening mechanism and reduces the risk of damage during maintenance access.
Solution Approach 2:
The wiper acts as an intermediary element between the opening door and the porous dirt separator. It mediates the interaction by performing the cleaning function during the opening process, protecting both the separator and the opening mechanism from potential damage while maintaining chamber integrity.
3Reliability
If multiple cleaning stages are used, then filtration efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the momentum separator and cyclone separator into a single integrated air treatment chamber that is accessed through one door. Both separation stages operate concurrently within the same chamber, providing multi-stage filtration without requiring multiple separate access points or complex independent mechanisms for each stage.
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 filtration efficiency by automatically cleaning the air treatment components, reducing user effort and maintaining the vacuum's performance by ensuring continuous dirt separation and air flow efficiency.
Implementation Method 1
an upstream momentum separator
Implementation Method 2
a downstream cyclone separator
Data Source
AI summary
A hand vacuum cleaner has a front end, a rear end, a longitudinal axis extending between the front and rear ends, an air flow passage, an air treatment member, an outer wiper, and a front door. The air treatment member includes a treatment chamber having a porous dirt separator. The wiper travels across at least a portion of an outer wall of the porous dirt separator as the wiper moves between a first position to a second position. The front door is moveably mounted between a closed position and an open position, and is drivingly connected to the wiper whereby when the front door moves from the closed position to the open position, the wiper travels from the first position to the second position. A hand vacuum cleaner also has a first cleaning stage which is rotatable to an open position wherein as the first cleaning stage is opened a wiper cleans a porous substrate.