Air Purification Filter Mesh Slit Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Photocatalyst-containing air purification filters face issues with frictional abrasion and damage in vibrating environments, leading to the generation of fine powders and reduced photocatalytic oxidation performance due to bead contact and detachment.
Innovation Solution
A filter design featuring a stack of mesh slits with a metal mesh support coated with a phosphor layer, transition metal particles, and a photocatalyst layer, where the phosphor layer includes phosphor materials and zeolite, and the photocatalyst layer includes titanium dioxide and graphite carbon nitride, with rubber packing between slits to prevent contact and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If photocatalyst-containing beads are randomly inserted into a mesh frame, then the filter structure is simple and easy to manufacture, but frictional abrasion occurs between beads in vibrating environments causing bead damage and photocatalyst detachment
Solution Approach 1:
The filter is divided into multiple mesh frames, each containing photocatalyst-containing beads. This segmentation allows each mesh frame to be a self-contained unit that can be manufactured and assembled independently, maintaining ease of manufacture while improving overall reliability through modular design.
Solution Approach 2:
Photocatalyst-containing beads are pre-filled into the mesh frames before final assembly. This preliminary action ensures proper positioning and distribution of beads, preventing frictional abrasion between beads during operation while maintaining a simple manufacturing process.
2Device complexity
If beads are randomly inserted into the frame, then device complexity is reduced, but fine powder is generated due to frictional abrasion and adheres to evaporator core or heater core causing potential difference corrosion
Solution Approach 1:
The filter system is segmented into multiple mesh frames that contain and isolate photocatalyst-containing beads. This segmentation prevents bead-to-bead contact and fine powder generation while maintaining simple device structure through modular assembly.
Solution Approach 2:
The mesh frames act as intermediaries that physically separate and contain the photocatalyst-containing beads. This intermediary structure prevents direct contact between beads, eliminating frictional abrasion and fine powder generation while keeping the overall device simple.
3Ease of manufacture
If titanium dioxide is used as a single-component photocatalyst, then manufacturing simplicity is improved, but photocatalytic oxidation reaction occurs only upon absorbing ultraviolet light due to large energy bandgap
Solution Approach 1:
The patent uses composite photocatalyst materials consisting of titanium dioxide combined with other materials that enable visible light absorption. This composite approach maintains manufacturing simplicity while dramatically improving photocatalytic oxidation efficiency by expanding the usable light spectrum from 3-4% UV to a much broader range including visible light.
4Ease of operation
If photocatalyst-containing material is used in vibrating environment, then air purification function is provided, but continuous bead damage decreases photocatalyst amount and deteriorates photocatalytic oxidation performance
Solution Approach 1:
The filter is divided into multiple mesh frames that independently contain photocatalyst-containing beads. This segmentation isolates mechanical stresses, preventing continuous bead damage and maintaining photocatalyst integrity over time while preserving air purification functionality in vibrating environments.
Solution Approach 2:
Photocatalyst-containing beads are pre-filled and securely positioned in mesh frames before deployment. This preliminary positioning prevents bead movement and damage during vibration, ensuring long-term durability and consistent photocatalytic oxidation performance throughout the service life of the air purifier.
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 solution maximizes photocatalytic oxidation efficiency and minimizes damage to the photocatalyst material, reducing fine powder generation and maintaining performance in vibrating conditions.
Implementation Method 1
each of the mesh slits includes a metal mesh support, a phosphor layer coated on a surface of the mesh metal support
Implementation Method 2
Titanium dioxide (TiO2), known as a representative photocatalyst material, generates radicals with strong oxidizing power when exposed to ultraviolet light
Implementation Method 3
active oxygen (O2−) or hydroxyl radicals (·OH) generated by photoreaction have higher oxidizing power than conventional chlorine (Cl2) or ozone (O3)
Data Source
AI summary
A filter for air purification includes a plurality of mesh slits, each mesh slit including a metal mesh support, a phosphor layer coated on a surface of the mesh metal support, a plurality of transition metal particles loaded on the phosphor layer, and a photocatalyst layer.