Vacuum Cleaner Filter Bag Design for High Air Flow and Low Energy Use
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Solution Overview
Problem
Conventional vacuum cleaning apparatuses with filter bags face challenges in maintaining high air flow and filtration efficiency while reducing energy input power, leading to compromised cleaning effectiveness and hygienic dust disposal.
Innovation Solution
The design incorporates a filter bag-holding compartment shaped to match the envelope of the filled filter bag, with bow-like ribs supporting the folding out of surface pleats, and a motor/fan unit placement that optimizes air flow and filtration efficiency, using high-efficiency filter materials like CS50 laminate with diffusers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional filter bags are used in vacuum cleaners, then dust filtration is achieved, but air flow is significantly reduced and energy input power increases
Solution Approach 1:
The filter bag is divided into multiple functional zones: a pre-filter section with larger pores for capturing larger particles and maintaining air flow, and a main filtration section with finer pores for capturing finer dust particles. This segmentation allows the system to achieve effective dust filtration while reducing resistance to air flow compared to conventional uniform filters.
Solution Approach 2:
Different regions of the filter bag are assigned different filtration characteristics. The pre-filter zone uses a coarser material that allows higher air flow, while the main filtration zone uses finer material for superior dust capture. This local differentiation optimizes the balance between air flow and filtration efficiency.
2Object-affected harmful factors
If conventional filter bags are used in vacuum cleaners, then dust filtration is achieved, but energy input power increases
Solution Approach 1:
The segmented filter structure with a pre-filter zone reduces overall filtration resistance by handling larger particles first, thereby reducing the power required by the motor/fan unit to maintain the same air flow and vacuum level.
Solution Approach 2:
The filter bag uses materials with different pore sizes and filtration efficiencies in different zones, changing the physical parameters of the filtration medium to optimize the balance between dust capture and energy consumption.
3Quantity of substance
If filter bag volume is increased to improve dust storage capacity, then dust storage capacity increases, but the filter bag does not fold out properly and filtration performance deteriorates
Solution Approach 1:
The filter bag is designed with dynamic folding characteristics that allow it to expand properly within the filter bag-holding compartment during operation. The folding pattern and material properties are optimized to ensure the bag maintains its structural integrity and filtration surface area while accommodating increased dust storage capacity.
Solution Approach 2:
The filter bag utilizes three-dimensional folding patterns that maximize the use of available space within the filter bag-holding compartment. By arranging folds in multiple dimensions, the design achieves both increased dust storage capacity and proper deployment of the filtration surface.
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 achieves significantly higher quality factors (QWun and QWteil) and air flow rates with reduced power input, ensuring effective cleaning and minimal dust emission, even as the filter bag fills, meeting energy-saving demands.
Implementation Method 1
high-efficiency filter materials like CS50 laminate with diffusers
Implementation Method 2
motor/fan unit placement that optimizes air flow and filtration efficiency
Data Source
AI summary
The invention relates to a vacuum cleaning apparatus comprising a vacuum cleaner and a filter bag. When using an empty filter bag, said vacuum cleaning apparatus has a quality factor QWun (defined as QWun=(hsaugun/hfbarun)×ψ where hsaugun is the vacuum, in [kPa], according to EN 60312, of the vacuum cleaning apparatus with an empty filter bag, hfbarun is the vacuum, in [kPa], in the filter bag-holding compartment with an empty filter bag, and ψ is the filtration efficiency, in [%], of the filter bag material) of more than 25, preferably more than 30, and/or when using a partly filled filter bag, the vacuum cleaning apparatus has a quality factor QWteil (defined as QWteil=(hsaugteil/hfbarteil)×ψ where hsaugteil is the vacuum, in [kPa], according to EN 60312, of the vacuum cleaning apparatus with a partly filled filter bag, hfbarteil is the vacuum, in [kPa], in the filter bag-holding compartment with a partly filled filter bag, and ψ is the filtration efficiency, in [%], of the filter bag material of more than 13, preferably more than 15, especially preferably more than 17.