Air Purifier Airflow Control for Filter Sterilization During Standby
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Solution Overview
Problem
Air purifiers face issues with micro-organism growth on filters during idle or standby modes, leading to reduced filter lifespan and potential health hazards due to biofilm formation, as they capture microbes but lack effective means to prevent their growth and dissemination during low air flow conditions.
Innovation Solution
An air purifier with a dual air flow setting, where a low air flow speed is used to prevent micro-organism growth and viability on internal surfaces and filters, significantly lower than filtration speeds, and an automatic system to detect conducive conditions for growth, actuating sterilization mode to reduce microbial presence with minimal energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If air purifier operates in idle or standby mode to conserve energy, then energy consumption is reduced, but micro-organisms grow and form biofilms on filters
Solution Approach 1:
The air purifier implements periodic sterilization cycles where the fan operates at high speed for short durations (e.g., 5-15 minutes) at scheduled intervals during standby mode. This periodic high-velocity air flow prevents biofilm formation by disrupting microbial colonies before they can establish, while maintaining low energy consumption overall by returning to idle mode between cycles.
2Productivity
If high air flow speed is used for filtration, then air purification efficiency is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts fan speed based on operational mode: high speed during active filtration to maximize particle capture efficiency, and low speed during standby to conserve energy. The dynamic switching between modes allows the system to optimize the balance between purification performance and energy consumption based on real-time air quality conditions and user needs.
3Use of energy by moving object
If air purifier remains in standby mode for extended periods, then energy consumption is reduced, but micro-organisms are released into environment during filter changes
Solution Approach 1:
The system performs preliminary sterilization of the filter and internal surfaces before filter removal by activating high-speed air flow for a predetermined period. This preliminary action eliminates or reduces micro-organism populations on the filter media and internal surfaces, ensuring that when the filter is changed, minimal organisms are released into the environment, thus protecting user health while maintaining energy efficiency.
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 low air flow rate effectively reduces micro-organism viability and growth on filters and internal surfaces, preventing their release into the environment during filter changes and extending filter life, while maintaining energy efficiency by using lower energy consumption for sterilization compared to filtration modes.
Implementation Method 1
a low air flow speed is used to prevent micro-organism growth and viability on internal surfaces and filters
Implementation Method 2
an ionizing assembly that operates to charge particulate material in an air flow passing through the purifier
Implementation Method 3
The charged particulate material is attracted to and retained by a filter element disposed downstream of the ionization assembly and having an electrical charge opposite to the charged particulate material
Data Source
AI summary
An air purifier comprising a removable particulate or gas filter, an air flow generator, a means for controlling said air flow generator, a first air flow setting with an air filtration air flow speed and a second air flow setting which correlates with sterilisation of an internal surface of the air purifier and/or removable particulate or gas filter. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising a removable filter in an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for preventing microbial growth on an internal surface of or a removable filter from an air purifier by activating the air flow generator.