Inkjet Recording Device Dual Ink Tank Level Management
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Solution Overview
Problem
Inkjet recording devices with multiple ink tanks of the same color face challenges in maintaining equal ink levels, leading to unnecessary cartridge replacements and increased costs, as nozzles connected to an empty tank cannot be cleaned even if the other tank has sufficient ink.
Innovation Solution
The recording device controls ink ejection from multiple nozzle rows to ensure that ink is printed from the tank with the most remaining ink, maintaining equal ink levels and minimizing nozzle flushing, thereby optimizing ink usage and reducing replacement costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cartridge with multiple ink tanks of the same color is installed to improve redundancy and availability, then device reliability is improved, but ink level imbalance causes unnecessary cartridge replacements increasing cost
Solution Approach 1:
The system dynamically switches between multiple nozzle rows based on real-time ink level detection. The control unit monitors ink levels in each tank and automatically selects which nozzle row to use, making the system adaptable to changing ink levels rather than being fixed to a single nozzle row.
Solution Approach 2:
The system incorporates feedback through ink level detection mechanisms that continuously monitor the state of each ink tank. This feedback information is used by the control unit to make intelligent decisions about which nozzle row to activate, ensuring optimal ink utilization and preventing premature cartridge replacement.
2Productivity
If ink is ejected from a tank that is becoming empty to maintain printing capability, then printing continuity is maintained, but the difference in ink amount between tanks increases leading to premature replacement
Solution Approach 1:
The system dynamically adjusts which nozzle row is active based on real-time ink level conditions. When one tank's ink level approaches a predetermined threshold, the system automatically switches to the other nozzle row, maintaining printing continuity while preserving ink balance between tanks.
Solution Approach 2:
The system takes preliminary action by detecting when ink levels approach critical thresholds before actual depletion occurs. By proactively switching nozzle rows based on predicted ink depletion, the system prevents complete emptying of any single tank while maintaining continuous printing capability.
3Reliability
If the cartridge is replaced when one ink tank becomes empty to ensure proper nozzle cleaning, then nozzle functionality is maintained, but cost increases when the other tank still has sufficient ink
Solution Approach 1:
The system dynamically switches between nozzle rows to extend cartridge life. By alternating usage based on ink levels, the system ensures that when one tank is depleted, the other has preserved sufficient ink for proper nozzle cleaning, eliminating the need for premature cartridge replacement.
Solution Approach 2:
The system recovers value from the second ink tank by preserving its ink supply through intelligent nozzle row selection. When the first tank is depleted, the second tank's preserved ink is utilized for cleaning the used nozzles, maximizing the utility extracted from each cartridge before replacement is necessary.
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
This approach ensures that ink is consistently ejected from the tank with the most ink, maintaining uniform ink levels and reducing the need for premature cartridge replacements, thus enhancing operational efficiency and cost-effectiveness.
Implementation Method 1
an inkjet head that prints using a first nozzle row that is connected to the first ink tank and ejects ink supplied from the first ink tank, and a second nozzle row that is connected to the second ink tank and ejects ink supplied from the second ink tank
Data Source
AI summary
A recording device has a cartridge that holds a first ink tank filled with ink, and a second ink tank that is filled with ink of the same color; an inkjet head that prints using a first nozzle row that ejects ink supplied from the first ink tank, and a second nozzle row that ejects ink supplied from the second ink tank; and recording control unit that prints on a recording medium by ejecting ink from the first nozzle row or the second nozzle row. The recording control unit determines which ink tank contains more ink, and ejects ink to print from the nozzle row connected to the ink tank containing the most ink.