Automatic HVAC Filter Change System Using Motor-Driven Media Rolls
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Solution Overview
Problem
Manual filter changes in HVAC systems require labor and attention, often leading to overlooked or forgotten filter replacements, which can result in inconsistent air quality.
Innovation Solution
An automatic HVAC filter change system that includes a motor assembly, frame, and control unit to automate filter changes on a scheduled basis, providing notifications when done.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual filter changes are performed, then labor and attention are required, but filter changes may be overlooked or forgotten leading to inconsistent air quality
Solution Approach 1:
The system performs filter changes automatically without human intervention. The motor assembly winds used filter media onto a take-up spool and deploys fresh filter media from a roll, enabling the system to service itself and maintain consistent air quality without requiring manual operation.
Solution Approach 2:
The patent replaces the manual mechanical system with an automated electromechanical system. A motor assembly with gears and a spool mechanism automates the filter media replacement process, substituting human labor with an automated mechanical system that ensures reliable, consistent operation.
2Ease of operation
If automated filter change system is implemented, then labor and travel are eliminated, but device complexity increases
Solution Approach 1:
The motor assembly performs multiple functions: it winds used filter media onto the take-up spool, tensions the filter media through the idler pulley, and controls the deployment of fresh filter media. This multi-functionality reduces the need for separate mechanisms, thereby managing device complexity while achieving full automation.
Solution Approach 2:
The system uses a dynamic spring-loaded tensioning mechanism with an idler pulley that automatically adjusts tension on the filter media during the winding and deployment process. This dynamic element simplifies the overall structure by using elastic energy storage and release rather than complex mechanical linkages.
3Reliability
If filter changes are delayed, then labor costs decrease, but air quality deteriorates
Solution Approach 1:
The system maintains continuous filter media supply and automatic replacement, ensuring uninterrupted air filtration. The motor assembly continuously winds used media and deploys fresh media without stopping the HVAC system, eliminating gaps in filtration and maintaining consistent air quality over time.
Solution Approach 2:
The system includes a sensor that detects when filter media needs replacement and triggers the motor assembly to perform the change. This feedback mechanism ensures filter media is replaced at the appropriate time, maintaining optimal air quality without unnecessary frequent changes or dangerous delays.
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
Eliminates human error in filter changes, ensuring consistent cleaner air quality by automatically replacing filters on a set schedule.
Implementation Method 1
a motor assembly and plate that connects to the frame in a first corner
Implementation Method 2
a drive spring hub connected to a near end of the motor roller tube and configured to rotate by rotational force generated by the motor assembly
Data Source
AI summary
An automatic HVAC filter change system is disclosed herein. The automatic HVAC filter change system changes filters automatically by way of a design configured to seamlessly move and change filters while on an automated schedule. The automatic HVAC filter change system provides notification and reminders for when it is done.