Ecologically efficient vacuuming device
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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 dust particle emission.
Innovation Solution
The design incorporates a filter bag with surface pleats and a filter bag-holding compartment with bow-like ribs to optimize air flow and filtration efficiency, using a motor/fan unit with reduced power input, and employing specific filter materials like CS50 and LT75 laminates to achieve high suction power and low particle emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional filter bags are used in vacuum cleaners, then the structure is simple and easy to manufacture, but the air flow is reduced and filtration efficiency is compromised when the bag is filled with dust
Solution Approach 1:
The filter bag is transformed from a conventional flat or simple cylindrical shape to a three-dimensional pleated structure. The pleats create multiple layers of filtration surface that extend in the radial direction, dramatically increasing the effective filter area without increasing the external dimensions of the bag. This dimensional transformation allows maintained air flow even when the bag is filled with dust.
Solution Approach 2:
The pleated filter media is nested within a supporting structure consisting of a inner cylinder and outer cage. The pleats are arranged concentrically between these two cylindrical elements, creating a nested configuration where the filtration surface is maximally packed within the available radial space. This nested arrangement maintains structural integrity while maximizing filter area.
2Power
If higher power motor/fan units are used to maintain air flow, then the suction power is improved, but the energy consumption increases
Solution Approach 1:
The invention changes the geometric parameters of the filter bag from conventional simple shapes to complex pleated configurations. By increasing the surface area through pleating while maintaining the same external volume, the filtration efficiency is improved without requiring higher motor power. This parameter change allows lower energy consumption for the same cleaning performance.
Solution Approach 2:
The filter bag employs composite construction with pleated filter media combined with a supporting cage structure. This composite design provides both the filtration function and the mechanical support needed to maintain the expanded pleated configuration, enabling efficient air flow through the dust-filled bag without excessive pressure drop that would require higher power input.
3Reliability
If the filter bag wall is made thicker to improve filtration efficiency, then the dust particle retention is improved, but the air flow is reduced
Solution Approach 1:
Instead of increasing the radial thickness of the filter wall, the invention increases the surface area by creating pleats that extend in the axial and radial directions. The pleated structure provides multiple filtration layers that intercept dust particles effectively, achieving high filtration efficiency without increasing the radial wall thickness that would restrict air flow.
Solution Approach 2:
The filter media is segmented into multiple pleated sections rather than a single thick wall. Each pleat creates additional filtration surfaces that work in parallel, improving dust retention through multiple interception opportunities while maintaining open channels for air flow between and through the pleats.
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 ensures high ecological efficiency with quality factors greater than 7 for empty and partly filled filter bags, maintaining effective cleaning performance with reduced energy consumption and minimal dust emission.
Implementation Method 1
a filter bag (66) with a filter bag wall (60) comprising surface pleats (21)
Implementation Method 2
the suction power Psaugun for an empty filter bag and Psaugteil for a partly filled filter bag are defined in the present document as the values of the suction power according to EN 60312
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 Qsun of more than 7, preferably more than 8, especially preferably more than 9 QSun=(Psaugun/Peiun)×ψ, where Psaugun is the suction power of the vacuum cleaning apparatus with an empty filter bag according to EN 60312, with orifice diameter 8, Peiun is the input power of the motor/fan unit of the vacuum cleaning apparatus with an empty filter bag according to EN 60312, with orifice diameter 8, and ψ is the filtration efficiency of the filter bag material), and/or when using a partly filled filter bag, the vacuum cleaning apparatus has a quality factor QSteil of more than 4, preferably more than 5, especially preferably more than 6 (QSteil=(Psaugteil/Peiteil)×ψ, where Psaugteil is the suction power of the vacuum cleaning apparatus with a partly filled filter bag according to EN 60312 with orifice diameter 8 after collecting 400 g of DMT8 test dust, and Peiteil is the input power of the motor/fan unit of the vacuum cleaning apparatus with a partly filled filter bag according to EN 60312 with orifice diameter 8 after collecting 400 g of DMT8 test dust, and ψ is the filtration efficiency of the filter bag material).