Hollow Fiber Clogging Detection in Inkjet Degassing
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Solution Overview
Problem
Inkjet recording apparatuses face failures due to clogging of hollow fibers in degassing apparatuses, leading to unnecessary replacement of components and wastage, as existing systems cannot accurately determine if clogging is the sole cause of non-ejection issues.
Innovation Solution
A degassing apparatus with a clogging detector that measures pressure differences across hollow fibers to diagnose clogging, allowing for precise identification of clogging issues and preventing unnecessary replacements by determining if other causes are involved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hollow fibers are replaced when non-ejection occurs, then the possibility of resolving clogging-related failures is improved, but unnecessary replacements occur when clogging is not the cause, leading to waste
Solution Approach 1:
The patent applies preliminary action by performing a clogging determination process before replacing hollow fibers. The controller detects whether the hollow interior is clogged with precipitated components before initiating replacement, ensuring that replacement is only performed when actually necessary. This preliminary detection prevents wasteful replacements while maintaining reliable failure resolution.
Solution Approach 2:
The patent implements feedback through a closed-loop diagnostic system. The controller monitors ejection status, determines whether non-ejection is caused by clogging, and uses this feedback information to decide on replacement actions. This feedback mechanism ensures that replacement decisions are based on actual clogging conditions rather than assumptions, eliminating unnecessary replacements.
2Reliability
If hollow fibers are replaced frequently to ensure reliable operation, then system reliability is improved, but maintenance time and operational downtime increase
Solution Approach 1:
The system performs preliminary clogging detection before failures occur by monitoring ejection status and analyzing whether non-ejection is caused by clogging. This allows the system to maintain reliable operation by only performing maintenance when actually needed, rather than following a fixed replacement schedule that would waste time on unnecessary maintenance activities.
Solution Approach 2:
The degassing apparatus performs self-diagnosis through the controller's automatic detection of clogging conditions. The system monitors its own operation, determines whether hollow fibers are clogged, and triggers replacement only when necessary. This self-service capability eliminates the need for manual inspection and reduces maintenance time by avoiding unnecessary interventions.
3Ease of operation
If clogging is suspected as the cause of non-ejection, then the diagnostic process is simplified, but unnecessary replacements occur when another cause is responsible
Solution Approach 1:
The patent implements a feedback-based diagnostic system that automatically determines whether non-ejection is caused by clogging. The controller receives feedback from ejection status monitoring and analyzes the cause, providing a definitive answer about whether clogging is responsible. This eliminates the need for operators to speculate about causes and prevents unnecessary replacements by baseless assumptions.
Solution Approach 2:
The patent replaces manual diagnostic processes with an automated electronic detection system. Instead of operators manually inspecting and guessing the cause of non-ejection, the controller automatically monitors ejection status and determines whether clogging is the cause. This substitution of mechanical/manual diagnostics with electronic automation simplifies the diagnostic process while preventing unnecessary replacements.
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 solution effectively identifies clogging in hollow fibers, reducing wasteful replacements and ensuring that only necessary components are replaced, thereby optimizing maintenance and operation of inkjet recording systems.
Implementation Method 1
the hollow fiber including a gas permeable film permeable to dissolved gas in the liquid, wherein the liquid is perfused and brought into contact with a hollow interior or exterior of the hollow fiber
Implementation Method 2
a side of the hollow fiber not in contact with the liquid is depressurized to allow the dissolved gas in the liquid to permeate the depressurized side
Data Source
AI summary
A degassing apparatus includes a hollow fiber disposed on a supply path for a liquid, the hollow fiber including a gas permeable film permeable to dissolved gas in the liquid. The liquid is refluxed and brought into contact with a hollow interior or exterior of the hollow fiber, and a side of the hollow fiber not in contact with the liquid is depressurized to allow the dissolved gas in the liquid to permeate the depressurized side. The degassing apparatus further includes a clogging detector that detects clogging of the hollow interior of the hollow fiber caused by a component in the liquid.