Vacuum Cleaner Filter Cleaning with Switchable Dust Separation
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Solution Overview
Problem
Existing vacuum cleaners face challenges in reducing pressure differential and energy consumption during vacuum cleaning, while maintaining high separation efficiency and avoiding high flow resistance, especially when using cyclone separators for both vacuum cleaning and filter cleaning processes.
Innovation Solution
A vacuum cleaner design that disconnects the separating unit from the air stream during vacuum cleaning mode and connects it only during filter cleaning mode, allowing for a separate air path with lower resistance, enabling efficient dust separation and filter cleaning without compromising airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separating unit is connected in the air stream path during vacuum cleaning to separate dust, then separation efficiency is improved, but flow resistance increases and energy consumption rises
Solution Approach 1:
The separating unit is made dynamically connectable and disconnectable to the air stream path through switching means. During vacuum cleaning mode, the separating unit is disconnected to minimize flow resistance and energy consumption. During filter cleaning mode, the separating unit is connected to achieve high separation efficiency for dust removed from the filter. This dynamic configuration allows the system to optimize performance for each specific operating mode.
Solution Approach 2:
The air stream path is segmented into multiple paths with the separating unit positioned in a separate branch. The switching means enable selective connection of the separating unit to the main air stream path. This segmentation allows the separating unit to be isolated during vacuum cleaning operations while remaining available for filter cleaning operations, thus avoiding continuous energy penalties.
2Measurement precision
If a separating unit is connected in the air stream path during vacuum cleaning to separate dust, then separation efficiency is improved, but noise increases
Solution Approach 1:
The separating unit is dynamically disconnected from the air stream path during vacuum cleaning mode through the switching means. This disconnection eliminates the noise generated by the separating unit during normal vacuum cleaning operations. The separating unit is only connected during filter cleaning mode when noise is less of a concern and separation functionality is required.
3Measurement precision
If the separating unit is operatively connected during vacuum cleaning, then dust separation is improved, but device complexity increases
Solution Approach 1:
The separating unit serves multiple functions: it separates dust during vacuum cleaning mode and separates dust removed from the filter during filter cleaning mode. The switching means enable a single separating unit to be used effectively for both purposes at different times, eliminating the need for separate separation systems for each function and thus reducing overall device complexity.
4Ease of manufacture
If filters are manually switched and cleaned by users, then filter maintenance is possible, but ease of operation deteriorates
Solution Approach 1:
The vacuum cleaner performs filter cleaning automatically using its own vacuum source and the separating unit. The system self-services by removing dust from the filter through reverse air flow and collecting the removed dust in the separating unit. This eliminates the need for users to manually disassemble, clean, and reassemble filters, significantly improving ease of operation while maintaining filter maintenance capability.
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 reduces energy consumption and noise, allows for a more compact structure, and eliminates the need for users to manually switch filters, achieving high separation efficiency with low flow resistance and simplified filter cleaning.
Implementation Method 1
a vacuum source for creating an air flow through the vacuum cleaner... in the filter cleaning mode, the vacuum source is arranged to force an air stream in a second air stream path through the filtering unit, in a second direction reverse to the first direction
Implementation Method 2
a separating unit for separating dust from a dust laden air stream... In the filter cleaning mode, the separating unit is, connected in the second air stream path between the vacuum source and the filtering unit to separate dust removed from the filtering unit from the air stream
Data Source
AI summary
A vacuum cleaner with a vacuum, a filtering unit, a switching device for switching between a vacuum cleaning and filter cleaning modes, and a separating unit is disclosed. In the vacuum cleaning mode, the vacuum forces a first air stream in a first air stream path through the filtering unit, in a first direction, to filter out dust from the dust laden air stream. In the filter cleaning mode, the vacuum forces a second air stream in a second air stream path through the filtering unit, in a second direction reverse to the first direction, to remove dust from the filtering unit. In the filter cleaning mode, the separating unit is in the air path between the vacuum and the filtering unit to separate dust removed from the filtering unit. In the vacuum cleaning mode, the separating unit is not in an air stream path.