Hand Dryer Ionization Assembly Without HEPA Filter Clogging
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Solution Overview
Problem
Hand dryer assemblies face challenges in effectively sanitizing the air stream and surrounding surfaces due to the limitations of HEPA filters, which require frequent replacement, lead to increased maintenance costs, and are less effective in reducing airborne microorganisms, especially in high-usage areas where filters can become clogged, causing performance degradation and energy inefficiency.
Innovation Solution
Incorporating an ionization assembly with a plasma power supply and carbon brushes that emit charged ions directly into the air stream, which sanitizes both the air and surfaces without the need for filters, reducing maintenance and energy consumption while effectively killing microorganisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HEPA filters are used to remove microorganisms from the air stream, then the air purification is improved, but the maintenance requirements increase and performance degrades over time due to filter clogging
Solution Approach 1:
The patent removes the filter component entirely from the hand dryer system and replaces it with an ionization assembly. This extraction eliminates the maintenance and performance degradation issues associated with filters while achieving the same air purification goal through a different mechanism - using charged ions to neutralize and remove microorganisms from the air stream without physical filtration.
Solution Approach 2:
The patent replaces the mechanical filtration system with an electrostatic ionization system. Instead of using physical barriers (filters) to remove microorganisms, the system uses electrically charged ions to neutralize and remove microorganisms from the air stream. This substitution eliminates the need for filter maintenance while maintaining effective air purification.
2Object-affected harmful factors
If HEPA filters are installed in hand dryer assemblies, then microorganism removal is improved, but the operating costs increase due to frequent filter replacement
Solution Approach 1:
The patent extracts the filter component from the system and replaces it with an ionization assembly that generates charged ions to remove microorganisms. This eliminates the recurring cost of filter replacement while maintaining effective air purification, directly addressing the operating cost issue.
Solution Approach 2:
The ionization assembly is designed to be maintenance-free and self-sustaining. The ionization electrodes continuously generate charged ions without requiring replacement parts or external intervention, eliminating the ongoing maintenance costs associated with filter replacement while maintaining consistent microorganism removal performance.
3Object-affected harmful factors
If filters are added to hand dryer assemblies, then air purification is improved, but the device complexity increases
Solution Approach 1:
The patent removes the complex filter installation and maintenance requirements by replacing filters with a simpler ionization assembly. The ionization system consists of electrodes that generate charged ions without requiring physical installation of filter media or ongoing maintenance interventions, reducing device complexity.
Solution Approach 2:
The patent replaces the mechanical filter installation and maintenance system with an electrostatic ionization system. The ionization assembly requires no physical installation of filter media and no ongoing maintenance, simplifying the device while achieving the same air purification function through electrical rather than mechanical means.
4Speed
If high velocity air stream is produced to speed up drying, then drying speed is improved, but the energy consumption increases
Solution Approach 1:
The ionization assembly operates continuously throughout the air stream path, maintaining a consistent concentration of charged ions that continuously neutralize and remove microorganisms. This continuous action ensures effective air purification throughout the entire drying process without requiring additional energy input or interrupting the high-velocity air stream.
Solution Approach 2:
The charged ions act as intermediaries between the blower assembly and the microorganisms in the air stream. The ions are introduced into the air stream and automatically neutralize microorganisms as they pass through, providing passive air purification that does not require additional energy input beyond the ionization assembly's power consumption.
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 ionization assembly provides a more sanitary air stream and surface sanitization, reducing microorganisms by over 99% without filter maintenance, improving energy efficiency, and maintaining performance over time without filter clogging, while being durable and ozone-free.
Implementation Method 1
an ionization assembly emitting charged ions into the moving air stream produced by the hand dryer assembly to sanitize the moving air stream
Implementation Method 2
an ionization assembly with a plasma power supply and carbon brushes that emit charged ions directly into the air stream
Data Source
AI summary
A hand dryer assembly including a blower assembly for generating a moving air stream. The moving air stream passes through an air channel to an air outlet where it exits the hand dryer assembly. An ionization assembly is disposed along the air channel and emits charged ions directly into the moving air stream, sanitizing the hands of the user, the moving air steam, and the ambient air that is entrained into the moving air stream.