Wound Cabin Air Filter for Pesticide Aerosol Separation
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Solution Overview
Problem
Existing air filters for vehicle cabins, particularly in agricultural and construction machines, are insufficient in filtering high concentrations of pesticides and fungicides, leading to inadequate air quality for drivers and operators.
Innovation Solution
An interior air filter with a combination of an adsorption filter region and a fine filter region, designed as a wound body with multiple layers of adsorbents such as activated carbon, zeolites, and ion exchangers, which provides extended contact time for filtration and improved separation of gases, aerosols, and vapors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional air filter with activated carbon and HEPA filter layers is used, then basic filtration is provided, but the filter effect is insufficient for high concentrations of pesticides and fungicides
Solution Approach 1:
The filter is divided into multiple functional layers: a coarse filter layer for dust, an adsorption layer with activated carbon for gases and vapors, and a fine filter layer for aerosols. This segmentation allows each layer to specialize in removing specific contaminants, significantly improving the overall filter effect against pesticides and fungicides compared to conventional single-layer filters.
Solution Approach 2:
The filter combines multiple materials with complementary properties: activated carbon for adsorbing organic compounds and pesticides, HEPA filter media for capturing aerosols, and coarse filter materials for dust. This composite structure creates a synergistic effect that addresses the full spectrum of harmful substances in agricultural environments.
2Reliability
If filter layers are added to improve filtration of pesticides and vapors, then filter effect is enhanced, but device complexity increases
Solution Approach 1:
The filter layers are arranged in a nested cylindrical configuration with the coarse filter layer on the outside, the adsorption layer in the middle, and the fine filter layer on the inside surrounding a central flow region. This nested structure maximizes filtration effectiveness while maintaining a compact form factor that does not significantly increase overall device complexity.
3Reliability
If a wound body design with multiple adsorbent layers is used, then contact time for adsorption is extended, but manufacturing complexity increases
Solution Approach 1:
The filter layers are wound into a cylindrical spiral configuration around a central flow region, creating a curved wound body design. This curvature extends the contact path of air through the adsorbent layers, increasing residence time and adsorption performance. The wound construction method is actually simpler to manufacture than flat pleated filters, as it requires only rolling and sealing operations.
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 significantly enhances air quality in toxin-heavy environments by effectively removing hazardous gases, dusts, and aerosols, ensuring a safer and healthier cabin atmosphere for operators.
Implementation Method 1
an adsorption filter region, in particular for the separation of gases
Implementation Method 2
The adsorbent may, in particular, be activated carbon and/or at least one material from the group zeolites, silica gels, metal oxides, molecular service, layered silicates, nanoclays
Implementation Method 3
at least one fine filter region, in particular for the separation of aerosols
Data Source
AI summary
The invention relates to an interior air filter element (10) for a driver's cabin (302) of agricultural and work machines, particularly having sprinkling or spraying devices for pesticides or fertilizers including a filter body (12) having an adsorption filter region (50) and a fine filter region (80) particularly for separating aerosols, wherein the filter body 12 is designed as a winding body having at least one winding layer.