Multi-Stage Filter Assembly for Maintainable Air Purification
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Solution Overview
Problem
Conventional air purifiers face efficiency decreases as filters and collecting units become dirty, and are often difficult to clean, with existing systems lacking effective solutions for maintaining high particulate removal rates over time.
Innovation Solution
An improved air purifying system featuring a series of filters including a pre-filter, electrostatic filter, activated carbon filter, and cold catalyst filter, with a programmable control panel for alerts and automatic operation modes, and a design allowing for easy filter cleaning and replacement, maximizing air purification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional air purifiers use filters and collecting units to remove particles, then particulate removal efficiency is improved, but efficiency decreases as filters become dirty and difficult to clean
Solution Approach 1:
The air purifier is divided into distinct functional modules: a filter assembly with replaceable filters, a collecting unit with washable collection surfaces, and a housing. This segmentation allows the filter assembly to be easily replaced while the collecting unit can be cleaned separately, resolving the contradiction between maintaining high removal efficiency and ease of maintenance.
Solution Approach 2:
The filter assembly is designed to be disposable or easily replaceable, while the collecting unit is designed to be recovered and cleaned. Used filters can be discarded without cleaning the entire device, and the collecting unit can be recovered by washing its surfaces, thus maintaining efficiency while simplifying maintenance operations.
2Reliability
If multiple filters are stacked in series to improve purification efficiency, then removal of dust, smoke and VOCs is improved, but device complexity increases
Solution Approach 1:
The filter system is segmented into distinct functional filters (pre-filter, HEPA filter, activated carbon filter) that can be stacked in series. Each filter targets specific contaminants, and the modular design allows them to be arranged in an optimal sequence without increasing overall device complexity, as each module is self-contained and independently replaceable.
Solution Approach 2:
The filter assembly is designed as a universal module that can be configured with different filter combinations to address various air quality needs. The same basic assembly structure accommodates different filter types and configurations, reducing device complexity while maintaining the ability to achieve high purification efficiency for multiple contaminant types.
3Reliability
If electrostatic filter with horizontal partitions is used to collect charged particles, then particle collection efficiency is improved, but the collecting unit becomes difficult to clean
Solution Approach 1:
The electrostatic filter is designed with smooth, non-porous horizontal partitions that prevent particle embedding. Contaminated filters can be discarded and replaced without complex cleaning procedures, while the collecting unit surfaces are designed to be easily recovered through simple washing, thus maintaining high collection efficiency while improving cleanability.
Solution Approach 2:
The electrostatic collection mechanism replaces mechanical filtration that would require physical cleaning of accumulated particles. By using electrostatic attraction to collect particles on smooth surfaces, the system eliminates the need for complex mechanical cleaning mechanisms, and the collected particles can be removed by simple washing or filter replacement.
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 system effectively removes over 99% of dust, smoke, and VOCs, outperforming prior art in formaldehyde removal and noise reduction, with improved filter maintenance features enhancing long-term performance.
Implementation Method 1
particles electrically charged by corona discharge of an ionizer
Implementation Method 2
collected by electrostatic attraction of an electrostatic filter having a polarity opposite to the polarity of the newly charged particles
Implementation Method 3
activated carbon filter
Implementation Method 4
cold catalyst filter
Implementation Method 5
cold catalyst filter
Data Source
AI summary
An air purifying system having a series of specific filters stacked to facilitate removal of particles from the air. Removable filters include a pre-filter, a HEPA electrostatic filter, an activated carbon filter and a cold catalyst filter. Additional filters or alternate filters may be used, so long as there is no negative impact on the system efficiency and effectiveness.