Liquid Circulation Device Pressure Feedback Control
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Solution Overview
Problem
Existing liquid circulation systems for flow-through liquid discharge heads face challenges in efficiently managing pressure variations and optimizing liquid feed control, leading to instability in liquid discharge and image quality, particularly due to environmental changes and component deterioration.
Innovation Solution
A liquid circulation device with a circulation passage, a liquid feeding device, and a pressure sensor, along with control circuitry that detects pressure and adjusts control parameters and calculation expressions to optimize the liquid feeding process based on the relationship between the drive amount of the liquid feeding device, discharge information, and pressure detection values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid circulation control is used, then the system structure is simple, but pressure variations occur and liquid discharge becomes unstable
Solution Approach 1:
The patent implements a feedback control mechanism where a pressure sensor detects pressure variations in the circulation passage, and the control circuitry adjusts the liquid feeding device's drive amount based on detected pressure and discharge information. This closed-loop feedback system stabilizes liquid discharge by continuously monitoring and correcting pressure deviations, resolving the contradiction between discharge stability and control complexity.
Solution Approach 2:
The patent replaces conventional mechanical pressure regulation mechanisms with an electronic control system that uses pressure sensors and electronic circuitry to dynamically adjust the liquid feeding device. This substitution allows for more precise and responsive pressure control, improving liquid discharge stability while maintaining manageable system complexity through electronic rather than purely mechanical means.
2Manufacturing precision
If fixed control parameters are used, then the control system is simple, but image quality deteriorates due to environmental changes and component deterioration
Solution Approach 1:
The patent transitions from fixed control parameters to dynamic control parameters that are continuously adjusted based on real-time pressure detection and discharge information. The control circuitry modifies drive amounts and control parameters adaptively in response to environmental changes and component deterioration, thereby maintaining image quality without requiring complex manual recalibration procedures.
Solution Approach 2:
The patent implements automatic parameter changes by the control circuitry, which modifies control parameters and calculation expressions based on detected pressure variations and discharge characteristics. This automatic parameter adaptation maintains optimal liquid discharge performance and image quality despite environmental changes or component aging, resolving the contradiction between precision and control complexity.
3Stability of the object's composition
If pressure variations are not managed, then the control system is simple, but liquid circulation becomes unstable
Solution Approach 1:
The patent employs pressure feedback control where the pressure sensor continuously monitors pressure in the circulation passage and the control circuitry adjusts the liquid feeding device's operation based on detected pressure deviations. This feedback mechanism actively compensates for pressure variations, stabilizing liquid circulation while managing the complexity through automated electronic control rather than complex mechanical pressure regulation systems.
Data Source
AI summary
A liquid circulation device includes a circulation passage, a liquid feeding device, a pressure sensor, and control circuitry. Through the circulation passage, liquid circulates to be supplied to and collected from a circulatory liquid discharge head. The liquid feeding device is configured to circulate the liquid through the circulation passage. The pressure sensor is configured to detect a pressure of the circulation passage. The control circuitry configured to acquire a characteristic indicating a relationship among a drive amount of the liquid feeding device, discharge information of the liquid discharged from the liquid discharge head, and a pressure detection value of the circulation passage; and change, based on the characteristic acquired, at least one of a control parameter and a calculation expression used to control the liquid feeding device.