Liquid Accommodation Body Pressure Stability
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Solution Overview
Problem
Existing liquid accommodation bodies, such as ink cartridges, face issues with air leakage and pressure fluctuations when cap members are attached or removed, leading to ink leakage due to compressed air flowing into or out of the ink accommodation portion, and challenges in maintaining suitable pressure for ink supply during packaging and usage.
Innovation Solution
A liquid accommodation body with a first communication path that allows air to escape to the outside when the cap member blocks the opening, and a second communication path for introducing air into the ink accommodation portion, maintaining pressure stability through a valve mechanism and meandering flow paths to reduce ink evaporation and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cap member is attached to block the opening of the ink supply portion, then ink leakage is prevented, but the inner chamber is compressed and air may flow into the ink accommodation portion
Solution Approach 1:
The cartridge is divided into separate functional chambers: the ink accommodation portion and the inner chamber. The ink supply portion acts as a partition wall between these chambers, preventing air from the inner chamber from flowing into the ink accommodation portion while still allowing ink to be supplied to the print head.
Solution Approach 2:
The ink supply portion serves as an intermediary structure between the inner chamber and the ink accommodation portion. It blocks air flow from the inner chamber to the ink accommodation portion while maintaining the ink supply function, thus mediating between the conflicting requirements of sealing and air isolation.
2Stress or pressure
If the inner chamber is maintained in a high-pressure state, then ink supply pressure is maintained, but when the cap member is removed the pressure drops suddenly and ink may leak out
Solution Approach 1:
The ink supply portion is pre-configured with a structure that maintains ink supply pressure through the deformation of the ink accommodation portion itself, rather than relying on high pressure in the inner chamber. This preliminary structural arrangement prevents sudden pressure drops and ink leakage when the cap member is removed.
Solution Approach 2:
The system changes from maintaining high pressure in the inner chamber to using the deformation characteristics of the ink accommodation portion to maintain ink supply pressure. This parameter change from pressure-based to deformation-based control prevents sudden pressure fluctuations and ink leakage.
3Quantity of substance
If the cartridge is accommodated in decompressed packaging material, then dissolved gas in ink is reduced, but air may flow into the ink accommodation portion from the inner chamber
Solution Approach 1:
The cartridge structure segments the inner chamber and ink accommodation portion with the ink supply portion acting as a barrier. This segmentation allows the cartridge to be placed in decompressed packaging for reducing dissolved gas, while preventing air from the inner chamber from flowing into the ink accommodation portion during decompression.
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
Prevents air from compressing and entering the ink accommodation portion, reduces ink leakage and evaporation, and maintains suitable pressure for ink supply, suitable for both half-sealed and sealed type cartridges.
Implementation Method 1
a meandering flow path extending along a meandering shape from the ink accommodation portion to the outside is formed in the accommodation body main body, and a length of the meandering flow path is 5 mm or more
Implementation Method 2
maintaining pressure stability through a valve mechanism
Data Source
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AI summary
A liquid accommodation body includes an accommodation body main body provided with a liquid accommodation portion for accommodating a liquid in an inner portion and a liquid supply portion which communicates with the liquid accommodation portion and has an opening for causing the liquid of the liquid accommodation portion to flow to the outside; a cap member which is mounted on the accommodation body main body in a detachable manner so as to block the opening of the liquid supply portion and, together with the liquid supply portion, forms an inner chamber by partitioning; and a first communication path which communicates the inner chamber with the outside.