Air Purification Filter with Segmented Bead Layers
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Solution Overview
Problem
Photocatalyst-containing beads in air purification filters suffer from frictional abrasion and detachment in vibrating environments, leading to reduced photolysis performance and generation of fine powders that can cause corrosion, due to direct contact between beads.
Innovation Solution
A filter design featuring an air-permeable body frame with photocatalyst-containing beads aligned in layers separated by mesh slits, incorporating a photoluminescent support, transition metal particles, and a photocatalyst layer, which minimizes bead contact and enhances photodegradation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If photocatalyst-containing beads are randomly inserted into a frame, then the filter structure is simple, but frictional abrasion occurs between beads in vibrating environments causing bead damage and photocatalyst detachment
Solution Approach 1:
The filter structure is segmented into multiple layers with mesh slits positioned between bead layers. This segmentation prevents direct contact between beads while maintaining structural organization, thereby reducing frictional abrasion and photocatalyst detachment in vibrating environments.
Solution Approach 2:
Mesh slits are introduced as intermediary elements between photocatalyst-containing beads. These mesh slits act as spacers that prevent direct bead-to-bead contact, eliminating the harmful frictional abrasion while allowing air to pass through the filter structure.
2Object-generated harmful factors
If beads are aligned in single layer at regular intervals with mesh slits, then bead contact is minimized preventing fine powder generation, but the filter structure becomes more complex
Solution Approach 1:
The filter is divided into multiple layers with mesh slits positioned between bead layers. This segmentation aligns beads in single layers at regular intervals, preventing bead contact and fine powder generation while maintaining a structured but manageable filter design.
3Power
If titanium dioxide is used as photocatalyst, then strong photolysis function is achieved under UV light, but only 3-4% of sunlight is absorbed due to large energy bandgap
Solution Approach 1:
The photocatalyst layer is formulated as a composite material containing titanium dioxide particles distributed within a porous matrix. This composite structure increases the surface area and number of active sites, enhancing photolysis function while improving sunlight absorption efficiency through increased interaction with incident light.
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 filter design maximizes photodegradation efficiency by reducing bead friction and preventing fine powder generation, maintaining photocatalyst performance and preventing corrosion, while allowing photolytic reactions under both UV and visible light.
Implementation Method 1
Titanium dioxide (TiO2), known as a representative photocatalyst material, generates radicals with strong oxidizing power when exposed to ultraviolet light
Implementation Method 2
air purifying technology by using a photocatalyst material having strong photolysis function has drawn considerable attention
Implementation Method 3
The plurality of beads may include a photoluminescent support comprising a phosphor material
Data Source
AI summary
A filter for air purification includes an air-permeable body frame and a photocatalyst member provided in the body frame. The photocatalyst member includes at least one mesh slit and a plurality of bead layers disposed on both sides of the mesh slit to be spaced apart from each other wherein the bead layers include a plurality of photocatalyst-containing beads aligned in a single layer to be spaced apart from each other at regular intervals.