Hydrogen Peroxide Vapor Dose Control via Pressure Feedback
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Solution Overview
Problem
Existing continuous hydrogen peroxide vapor generators lack the capability to produce small and precise doses of hydrogen peroxide vapor for sterilization purposes, failing to provide controlled and variable concentrations of vapor.
Innovation Solution
A device and method that injects a precise amount of liquid hydrogen peroxide onto a hot surface within an injection chamber, allowing for the generation of small and precise doses of hydrogen peroxide vapor by measuring the pressure increase in the chamber, which indicates the vapor dose concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous hydrogen peroxide vapor generators are used, then continuous vapor generation is achieved, but precise dosing capability is lost
Solution Approach 1:
The system transitions from continuous vapor generation to periodic/pulsed operation, where liquid hydrogen peroxide is injected in controlled amounts onto a heated surface at intervals. This allows precise dosing while maintaining overall productivity through automated cyclic operation with pressure measurement feedback for each dose.
2Ease of operation
If continuous vapor generation is used, then vapor supply is maintained, but dose control and concentration variability are reduced
Solution Approach 1:
A pressure sensor provides real-time feedback on the amount of vapor generated in the chamber. The system measures pressure increase after each liquid peroxide injection to verify the correct dose was delivered, enabling precise control and documentation of each vapor dose while maintaining ease of operation through automated control.
Solution Approach 2:
The system dynamically adjusts operation by varying the amount of liquid peroxide injected onto the heated surface, allowing different vapor concentrations to be produced on demand. This dynamic control enables adaptability for different sterilization requirements while maintaining continuous operational capability.
3Measurement precision
If precise dosing is implemented, then vapor dose accuracy is improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical dosing mechanisms with a simpler approach: injecting a controlled amount of liquid peroxide onto a heated surface, where thermal energy automatically converts it to vapor. The dose accuracy is achieved through pressure measurement feedback rather than complex mechanical dosing components, reducing overall device complexity.
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
Enables the production of individual doses of hydrogen peroxide vapor in various concentrations, ensuring effective sterilization while minimizing waste and optimizing resource usage.
Implementation Method 1
the required amount of liquid hydrogen peroxide is injected onto the hot surface of the injection chamber
Implementation Method 2
the pressure in the injection chamber increases, the value of which indicates the content of the required amount of hydrogen peroxide in the generated hydrogen peroxide vapor dose
Data Source
AI summary
A device for the generation, control, and application of a hydrogen peroxide vapor dose includes an injection chamber (1), an inlet valve (10), an outlet valve (11), a chamber depressurization valve (9), an injection chamber pressure sensor (3), an injection valve (2), a hydrogen peroxide supply line (16), a carrier medium supply line (13), and an application line (15). A required amount of liquid hydrogen peroxide (8) is injected onto the hot injection surface of the chamber (12) of the closed, heated, and depressurized injection chamber (1) via the injection valve (2), thereby changing the state of hydrogen peroxide from liquid to gas. The correctness of the injected amount of liquid hydrogen peroxide (8) is evaluated by measuring the pressure rise in the injection chamber (1), and a required batch of hydrogen peroxide vapor is generated at a desired concentration.