Handheld Vacuum Self-Cleaning Filter and Auto-Emptying Bin Design
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Solution Overview
Problem
Handheld vacuum cleaners require frequent maintenance such as bin emptying and filter cleaning, which can extend the downtime of the device, and there is a need to extend the life of filters without manual washing.
Innovation Solution
A vacuum cleaning system with a self-cleaning mode that reverses airflow through the membrane filter to dislodge dirt, combined with a docking station that uses a vacuum generator to empty the dirt bin efficiently without additional motors, enhancing cleaning effectiveness and reducing the need for frequent maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vacuum cleaner uses a membrane filter to filter discharged airflow, then filtration performance is improved, but the filter requires frequent manual cleaning which increases maintenance time and device downtime
Solution Approach 1:
The system enables the membrane filter to clean itself by utilizing the vacuum motor's own suction power to generate reverse airflow that removes accumulated dirt from the filter surface, eliminating the need for manual disassembly and cleaning by the user
Solution Approach 2:
The system reverses the normal airflow direction through the membrane filter during cleaning cycles, causing air to flow from the discharge side back through the filter to the intake side, which dislodges and removes accumulated dirt particles from the filter surface
2Ease of operation
If the vacuum cleaner is designed with compact size for portability, then ease of operation is improved, but the dirt bin capacity is reduced requiring more frequent emptying
Solution Approach 1:
The system automatically empties the dirt bin using the vacuum motor's suction power to create a vacuum that draws dirt from the bin through the housing and out of the device, eliminating the need for manual emptying operations
Solution Approach 2:
The system employs periodic pulsed airflow through the dirt bin at predetermined intervals during operation, creating cyclical cleaning cycles that continuously remove accumulated dirt without requiring user intervention
3Productivity
If additional motors are added to the docking station for bin emptying, then bin emptying efficiency is improved, but device complexity and cost increase
Solution Approach 1:
The vacuum motor serves dual functions: it powers the vacuum cleaner during normal operation and also powers the bin emptying operation when the cleaner is docked, eliminating the need for a separate motor in the docking station
Solution Approach 2:
The system uses controlled airflow through valves and passages as an intermediary mechanism to transfer the vacuum motor's suction power to the bin emptying function, enabling remote bin emptying without direct mechanical connection or additional motors
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 system effectively cleans the membrane filter and empties the dirt bin with minimal user intervention, reducing maintenance frequency and extending the operational life of the vacuum cleaner.
Implementation Method 1
the vacuum motor draws dirty air from a dirty-air inlet through the dirt bin, the primary separation system and the membrane filter
Implementation Method 2
permit air to flow from the air valve arrangement through the membrane filter in a second airflow direction to clean dirt from the membrane filter
Implementation Method 3
a primary separation system and a membrane filter, wherein the primary separation system is adapted to separate dirt from air that flows through the primary separation system
Data Source
AI summary
A vacuum cleaning system comprising a vacuum cleaner having a vacuum motor, a dirt bin, a primary separation system, a membrane filter, and an air valve arrangement configured to control air flow through at least the membrane filter. The vacuum cleaner is configured to be operable in a surface cleaning mode and a self-cleaning mode. In the surface cleaning mode, the vacuum motor draws dirty air from a dirty-air inlet through the dirt bin, the primary separation system, and the membrane filter in a first airflow direction. In the self-cleaning mode, the vacuum cleaner permits air to flow from the air valve arrangement through the membrane filter in a second airflow direction to clean dirt from the membrane filter. The membrane filter may be positioned upstream from the vacuum motor or positioned downstream from the vacuum motor, when considered in an airflow direction during a surface cleaning mode.