Inkjet Recording Device Adaptive Discharge Control
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Solution Overview
Problem
Conventional inkjet recording devices face issues with ink cartridge compatibility, leading to potential clogging and overflow risks when unsuitable inks are used, as the absorption capacity of the waste ink tank's porous member is not adequately considered, potentially damaging the device.
Innovation Solution
The inkjet recording device implements a flushing operation and discharge process that adjusts based on the type of ink cartridge, performing a cartridge replacement discharge with varying speeds to prevent ink mixing and overflow by determining the ink type through ID reading and adjusting the discharge amount accordingly, using a combination of high-speed and low-speed flushing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large amount of ink is discharged at high speed during maintenance operation, then the productivity of ink discharge is improved, but the reliability of the system deteriorates due to risk of overflow and damage to circuit board
Solution Approach 1:
The ink discharge operation dynamically adjusts its speed based on the ink type being discharged. The control unit switches between high-speed discharge mode (for compatible inks) and low-speed discharge mode (for incompatible inks), allowing the system to optimize productivity while maintaining safety. This dynamic adjustment resolves the contradiction by making the discharge speed adaptive rather than fixed.
Solution Approach 2:
The system changes the discharge parameter (speed) based on the ink type detected. When incompatible ink is detected, the discharge speed parameter is changed from high to low, ensuring that the porous member can absorb the ink at a safe rate. This parameter change allows the system to maintain high productivity for compatible inks while ensuring safety for incompatible inks.
2Loss of time
If the discharge amount of waste ink per unit time is maximized, then the time taken for completion of discharge is minimized, but the waste ink may overflow the tank if the discharge exceeds the sponge absorption rate
Solution Approach 1:
The system uses feedback from the ink type detection to adjust the discharge rate. The control unit receives information about the ink type and automatically adjusts the discharge speed accordingly. This feedback mechanism ensures that the discharge rate never exceeds the sponge's absorption capability, preventing overflow while minimizing discharge time for compatible inks.
Solution Approach 2:
The discharge operation transitions from a static fixed-speed approach to a dynamic adaptive-speed approach. The system continuously monitors ink type and adjusts discharge speed in real-time, allowing fast discharge when safe and slow discharge when necessary, thus resolving the time-loss versus overflow-risk contradiction.
3Reliability
If ink type detection and adaptive discharge control are implemented, then the reliability and safety are improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The control unit performs multiple functions: it detects ink type, determines compatibility, selects appropriate discharge parameters, and controls the discharge operation. By making the control unit multi-functional, the patent avoids adding separate dedicated components for each function, thereby limiting the increase in device complexity while achieving improved reliability.
Solution Approach 2:
The patent merges the ink type detection function, compatibility judgment function, and discharge control function into a unified control process. Rather than adding separate independent systems, these functions are integrated into the existing control unit, reducing the overall complexity increase while maintaining high reliability through adaptive control.
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 effectively prevents ink coagulation and overflow by ensuring the waste ink tank can absorb the discharged ink, maintaining device integrity and preventing damage from incompatible ink types, while allowing for efficient maintenance operations.
Implementation Method 1
A porous member, e.g., a sponge, is provided inside such a tank, and waste ink is absorbed by the sponge.
Implementation Method 2
A porous member, e.g., a sponge, is provided inside such a tank, and waste ink is absorbed by the sponge.
Data Source
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AI summary
The invention provides an inkjet recording device (1) includes an ink cartridge receiving unit (50) configured to receive an ink cartridge (70) and an inkjet head (8) configured to eject an ink. The inkjet recording device further includes an ink passage configured to transport the ink from the ink cartridge (70) to the inkjet head (8) and includes a detecting unit configured to detect a type of the ink cartridge (70) received in the ink cartridge receiving unit (50). The inkjet recording device still further includes a waste ink collection unit (40) includes an absorber (42) configured to absorb the ink, and includes a discharging unit configured to discharge ink remaining in the ink passage at one of a first discharging rate and a second discharging rate. Moreover, the inkjet recording device includes a controller (100) configured to control the discharging unit to discharge an amount of the ink. The controller is configured to control the discharging unit to discharge ink at one of the first discharging rate and the second discharging rate corresponding to the type of the ink cartridge detected by the detecting unit. The inkjet recording device may prevent or reduce ink coagulation due to mixing of different types of inks and may prevent or reduce the overflow of the waste ink tank.