Inkjet Printer Gas Pressure Controller With Negative Pressure Test Line
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Solution Overview
Problem
Existing gas pressure controllers in inkjet printers struggle to maintain the meniscus state of ink, leading to low precision printing and contamination due to ink leakage. Additionally, frequent inspections to prevent sudden failures disrupt production efficiency and increase costs.
Innovation Solution
A gas pressure controller with a negative pressure test line that allows for continuous testing of negative pressure during normal printer operation, without interrupting the inkjet printer's use. This includes a negative pressure generation unit, a positive pressure generation unit, a pressure control module, and a negative pressure test line that can measure and compare the generated negative pressure with normal values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent inspection of the gas pressure controller is performed to maintain negative pressure and prevent ink leakage, then reliability of inkjet printing is improved, but productivity decreases due to interruption of printer operation
Solution Approach 1:
The patent implements preliminary action by performing negative pressure tests during periods when the printer is not actively printing (e.g., during maintenance windows or idle periods). The control unit schedules and executes tests at predetermined intervals without requiring real-time printing interruption, thereby maintaining reliability through frequent testing while preserving productivity during active production periods.
Solution Approach 2:
The patent introduces an intermediary testing mechanism where the control unit acts as a mediator between the gas pressure controller and the printing operation. The negative pressure test line and test unit provide an indirect testing path that allows verification of negative pressure without directly interrupting the printing process, enabling simultaneous operation and monitoring.
2Manufacturing precision
If the ink storage unit is positioned higher than the inkjet head to maintain meniscus state, then manufacturing precision of ink discharge is improved, but device complexity increases due to additional gas pressure control system
Solution Approach 1:
The patent implements feedback control where the control unit continuously monitors the negative pressure status through the negative pressure test line and automatically adjusts the gas pressure controller's operation. This closed-loop feedback system maintains precise negative pressure levels required for meniscus stability and accurate ink discharge, while the automated control reduces the need for complex manual intervention and system management.
Solution Approach 2:
The gas pressure control system performs self-service by automatically maintaining negative pressure through the control unit's autonomous operation. The system monitors its own status via the negative pressure test line and self-adjusts without external intervention, reducing operational complexity while ensuring precise ink discharge through consistent negative pressure maintenance.
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 continuous operation of the inkjet printer while performing negative pressure tests, reducing production costs and preventing damage from sudden failures by allowing for frequent, non-disruptive testing of the gas pressure controller.
Implementation Method 1
a negative pressure generation unit (110) capable of suctioning air and applying negative pressure through an output tube (140)
Implementation Method 2
a positive pressure generation unit (120) capable of exhausting air and applying positive pressure through the output tube (140)
Implementation Method 3
a negative pressure test line (150) capable of testing the negative pressure generated by the negative pressure generation unit (110) when connected to the negative pressure generation unit
Implementation Method 4
the ink that is in a discharge-ready state in an inkjet head should be maintained in a meniscus state, i.e., a curved surface state in which the ink is indented inward with respect to a nozzle inlet by a capillary phenomenon
Data Source
AI summary
An inkjet printer gas pressure controller provided with a negative pressure test line, an inkjet printer including the gas pressure controller, and a method of testing negative pressure in the inkjet printer are proposed. The gas pressure controller having the negative pressure test line for controlling gas pressure includes a negative pressure generation unit capable of suctioning air and applying negative pressure through an output tube, a positive pressure generation unit capable of exhausting the air and applying positive pressure through the output tube, a negative pressure test line capable of testing the negative pressure generated by the negative pressure generation unit when connected to the negative pressure generation unit, and a pressure control module for controlling the negative pressure or positive pressure to be applied through the output tube by controlling a connection relationship between the negative pressure generation unit, the positive pressure generation unit, and the output tube.