Liquid Ejecting Device Gas Permeable Film Segmentation
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Solution Overview
Problem
Existing liquid ejecting devices face inefficiencies in discharging gas from the liquid supply channel, especially when a large amount of gas flows in, leading to incomplete removal and potential air accumulation near the ventilation film, which can interfere with ink flow to the print head.
Innovation Solution
A liquid ejecting device with a gas permeable film separating the liquid supply channel and discharge channel, allowing gas to pass while preventing liquid flow, and a suction unit connected to the discharge channel to efficiently remove gas, with the liquid supply channel extending in a direction intersecting the nozzle surface to maximize gas- film contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is discharged from the ink chamber to the air chamber using reduced pressure, then air can be prevented from flowing into the print head, but when a large amount of gas flows in, the gas accumulates at a position apart from the ventilation film and cannot be efficiently discharged
Solution Approach 1:
The ink chamber is divided into multiple discharge regions by providing multiple ventilation films at different positions. Each ventilation film creates a separate discharge path, allowing gas to be discharged from multiple locations simultaneously. This segmentation enables efficient removal of large amounts of gas while maintaining reliable air prevention at the print head.
Solution Approach 2:
Instead of relying solely on vertical gas accumulation near the single ventilation film, the invention introduces horizontal discharge paths through multiple ventilation films positioned at different locations. This multi-dimensional approach allows gas to be discharged from various positions throughout the ink chamber, not just from the upper portion near one ventilation film.
2Reliability
If a single ventilation film is used to separate liquid and gas, then liquid can be supplied to the print head, but gas accumulation occurs when large amounts of gas flow in
Solution Approach 1:
Multiple ventilation films are positioned at different locations within the ink chamber, creating multiple gas discharge paths. Each ventilation film maintains liquid supply function while collectively providing enhanced gas discharge capacity. This segmentation allows the system to handle larger gas volumes without compromising liquid supply stability to the print head.
Solution Approach 2:
Ventilation films are strategically positioned at specific locations within the ink chamber where gas accumulation is most likely to occur. Each ventilation film is placed to address local gas accumulation patterns, providing targeted gas discharge while maintaining liquid supply at that specific region. This localized approach ensures both liquid supply stability and effective gas removal throughout the chamber.
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 configuration ensures efficient discharge of gas from the liquid supply channel, even when a large amount flows in, preventing air from entering the print head and maintaining ink flow integrity.
Implementation Method 1
a gas permeable film disposed in the connecting portion between the liquid supply channel and the discharge channel, the gas permeable film configured to pass the gas and do not pass the liquid
Implementation Method 2
a suction unit connected to the discharge channel so as to suction the gas in the discharge channel
Data Source
AI summary
A liquid ejecting device is provided. The liquid ejecting device includes: a liquid ejecting head including a nozzle for ejecting a liquid; a liquid supply channel for supplying the liquid to the liquid ejecting head; a discharge channel for discharging a gas in the liquid supply channel; a gas permeable film disposed in a connecting portion between the liquid supply channel and the discharge channel, the gas permeable film partitioning the liquid supply channel and the discharge channel; and a suction unit connected to the discharge channel so as to suction the gas in the discharge channel, wherein the liquid supply channel includes a first liquid flow channel extending in an extending direction intersecting a horizontal direction, and wherein the gas permeable film defines a part of the first liquid flow channel extending in the extending direction.