Switchable filtration system
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Solution Overview
Problem
HVACR systems face inefficiencies due to the continuous use of high-rated filters, which increase energy consumption and reduce filter life, as users lack the ability to switch filters based on air quality scores or occupancy levels, leading to unnecessary filtration costs and energy expenditure.
Innovation Solution
A switchable filtration system that includes a controller to determine air quality scores and switch between high and low-rated filters, reducing energy consumption by minimizing the use of high-pressure drop filters and extending filter life through 'hot swap' filter changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a higher rated filter is used continuously, then filtration efficiency is improved, but energy consumption increases and filter life decreases
Solution Approach 1:
The system dynamically switches between different filter ratings based on real-time air quality conditions. A controller monitors air quality parameters and automatically selects the appropriate filter (higher or lower rated) to match current conditions, transforming the static filter selection into a dynamic adaptive system that optimizes both filtration efficiency and energy consumption
Solution Approach 2:
The system changes the operational parameters of the filtration system by adjusting which filter is active based on air quality scores. When air quality is good, lower rated filters are used; when air quality deteriorates, higher rated filters are deployed. This parameter change approach allows the system to adapt filtration intensity to actual needs, reducing unnecessary energy consumption while maintaining required filtration levels
2Reliability
If a higher rated filter is used continuously, then filtration efficiency is improved, but filter life is shortened
Solution Approach 1:
The system implements dynamic filter selection that adapts to changing air quality conditions. By switching between higher and lower rated filters based on real-time monitoring, the system reduces the cumulative exposure of higher rated filters to contaminants, thereby extending their service life while maintaining adequate filtration efficiency when needed
Solution Approach 2:
The controller adjusts the operational status of different filters based on air quality scores and filter usage parameters. When air quality is acceptable, the system switches to lower rated filters, reducing the workload and extending the life of higher rated filters. This parameter-based control optimizes the balance between filtration performance and filter longevity
3Use of energy by moving object
If filter switching capability is added, then energy consumption is reduced, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors air quality, determines air quality scores, decides which filter to activate, and manages the switching apparatus. By making the controller multi-functional, the system avoids adding separate dedicated components for each function, thereby reducing overall system complexity while achieving filter switching capability
Solution Approach 2:
The switching apparatus acts as an intermediary component that physically connects and disconnects filters from the airflow path based on controller instructions. This intermediary mechanism simplifies the complexity by providing a dedicated, simple switching function rather than requiring the controller to directly manage complex filter replacement or adjustment mechanisms
Data Source
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AI summary
A switchable filtration system for a heating, ventilation, air conditioning, and refrigeration (HVACR) system is disclosed. The filtration system includes a first filter, a second filter, a switching apparatus, and a controller. The controller is configured to determine an air quality score. When the air quality score exceeds a predetermined threshold, the controller controls the switching apparatus to switch the first filter out of an active airflow path. When the air quality score is at or below the predetermined threshold, the controller controls the switching apparatus to switch the first filter into the active airflow path.