Multi-Stage Air Purification Device for PM, NOX, and VOC Removal
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Solution Overview
Problem
Current air purification devices are inadequate in effectively reducing the concentration of both solid particles and gases in polluted air, particularly in urban and industrial environments, where pollutants like PM, NOX, VOCs, and CO2 pose health risks.
Innovation Solution
An autonomous air purification device with a three-stage filtration system, utilizing coarse, medium, and fine filters, combined with ultraviolet-light photocatalytic compounds and activated carbon filters, to trap and break down pollutants, ensuring clean air is expelled through a high-speed nozzle system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple filtration stages and photocatalytic compounds are used, then pollutant removal efficiency is improved, but device complexity increases
Solution Approach 1:
The air purification device is divided into multiple filtration stages (coarse filtration, medium filtration, fine filtration) with each stage handling specific particle sizes. This segmentation allows systematic removal of different pollutant types while maintaining manageable device architecture.
Solution Approach 2:
The filtration system employs nested filtering elements where coarse, medium, and fine filters are arranged in sequential layers within the device housing. This nesting approach maximizes space utilization and enables comprehensive filtration without excessive device volume.
2Reliability
If activated carbon filters and photocatalytic compounds are used, then gas pollutant removal is improved, but manufacturing cost increases
Solution Approach 1:
The device incorporates photocatalytic compounds that change their chemical properties when exposed to UV light, enabling them to break down gas pollutants like NOX and VOCs. This parameter change approach provides effective gas removal without requiring large quantities of expensive activated carbon material.
Solution Approach 2:
The filtration system combines activated carbon with photocatalytic compounds in a composite structure. This composite material approach leverages the adsorption capabilities of activated carbon while adding the photocatalytic degradation function, achieving enhanced gas pollutant removal with optimized material costs.
3Productivity
If high-speed nozzle system is used, then clean air expulsion efficiency is improved, but energy consumption increases
Solution Approach 1:
The high-speed nozzle system operates in periodic cycles, alternating between high-speed expulsion mode and lower-speed mode. This periodic operation maintains effective clean air delivery while reducing peak energy consumption and allowing for thermal management of the motor system.
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 device significantly reduces pollutant concentrations, enhancing air quality by capturing and neutralizing PM, NOX, VOCs, and CO2, thereby mitigating vascular and respiratory disease risks and improving breathing conditions in both indoor and outdoor spaces.
Implementation Method 1
ultraviolet-light lamps, configured to, in combination with the ultraviolet light, transform the NOX and CO gases, by means of a photocatalytic reduction of acidic gases contained in the air
Implementation Method 2
an activated carbon filter configured to trap and eliminate the volatile organic compounds and inorganic acidic gases contained in the air that has passed through the ducts
Implementation Method 3
first filtering elements configured to trap the coarse dust particles contained in the outside air
Data Source
AI summary
An integrated autonomous air purification device for taking in polluted air, carrying it through the inside of the purification device where it passes through a set of filtering elements (1) that trap the dust particles contained in the air; ultraviolet-light lamps (2) that transform NOX and CO gases in the air into harmless compounds; an activated carbon filter (4) that traps and eliminates the volatile organic compounds and inorganic acidic gases; second filtering elements (5) that carry out a second filtering; and an extraction hood (6) configured to direct the air coming out of the second filtering elements (5) to at least one nozzle (7) that expels the air to the outside of the purification device.