Movable Air Filter Housing for Ceiling Intake Safe Replacement
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Solution Overview
Problem
Existing air filter replacement systems in ventilation systems are difficult to use due to the need for ladder access and risk of injury from swinging grates, with existing solutions failing to address the interplay between grates and filters, leading to messy and hazardous filter changes.
Innovation Solution
A movable air filter housing system that can be raised and lowered using a control tool, allowing for safe and easy filter replacement without ladder access, featuring extendable connectors, a latch system, and optional brakes for secure positioning, along with an air filter condition indicator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the air intake is located in the ceiling to save space, then the ventilation system is more compact, but the user must stand on a ladder to access and replace the air filter, creating safety hazards
Solution Approach 1:
The patent applies the dynamics principle by making the filter housing movable rather than fixed. The housing can be lowered from the ceiling location to a ground-level position where users can easily access and replace filters without ladders, then raised back to the ceiling position when replacement is complete. This dynamic positioning resolves the contradiction between compact ceiling installation and easy filter maintenance.
2Reliability
If a fixed grate is used to secure the filter in the ceiling intake, then the filter is held securely in place, but the grate swings down and may hit the user when opened, creating safety hazards
Solution Approach 1:
The patent eliminates the swinging grate hazard by making the entire filter housing movable on demand. Instead of a fixed grate that swings open, the housing itself is designed to be lowerable to ground level for filter access. This dynamic approach maintains secure filter holding during operation while eliminating the swinging motion that causes injury risks.
3Ease of operation
If the filter is unsecured during grate opening, then the grate can be opened freely, but the filter falls under gravity and creates a mess, requiring the user to remain on the ladder
Solution Approach 1:
The patent eliminates the filter dropping hazard by designing the housing to lower as a complete unit with the filter securely contained inside. When the housing is lowered to ground level, users can access and replace filters without the filter becoming unsecured or falling. This dynamic housing approach maintains filter security while providing easy ground-level access, preventing dust shedding and mess.
Data Source
AI summary
An air filter unit for an air intake of an air handling or HVAC system includes a grate configured to support a plurality of spaced apart filters at a top side thereof, whereby air is drawn through the grate and then sequentially through the filters into the air intake. The air filter unit may include a filter indicator which provides a visual indication of the air filters, such as based upon the pressure differential on either side of the air filters.