Liquid Container Chamber Segmentation for Ink Detection Accuracy
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Solution Overview
Problem
In liquid containers, such as ink cartridges, widening the containing section to increase ink volume can lead to deteriorated detection accuracy of the remaining ink amount due to lower liquid surface levels and potential air bubble mixing, which adheres to detection members, affecting the accuracy of ink level detection.
Innovation Solution
The container is divided into multiple chambers with a detection member in the fourth chamber, where the liquid is injected from an upstream port, minimizing air bubble mixing and maintaining high liquid surface levels, thus preventing air bubbles from adhering to the detection member and maintaining detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the area of the containing section is widened to increase ink volume, then the cartridge does not protrude in the vertical direction, but the detection accuracy of the remaining ink amount deteriorates due to lower liquid surface levels
Solution Approach 1:
The containing section is divided into multiple chambers (first, second, third, and fourth chambers) arranged in the flow direction of the ink. The detection member is specifically placed in the fourth chamber, which is positioned upstream relative to the supply port. This segmentation allows the detection chamber to maintain a higher liquid surface level even when the total ink volume is large, thereby preserving detection accuracy while accommodating increased ink capacity.
2Volume of moving object
If the ink is injected from the small room to increase ink amount, then the volume is increased, but air bubbles are mixed into the small room and adhere to the detection member, deteriorating detection accuracy
Solution Approach 1:
The injection port is positioned in the first chamber, which is upstream relative to the fourth chamber containing the detection member. By injecting ink from the upstream first chamber rather than directly into the fourth chamber, the ink flows through the intermediate second and third chambers first. This preliminary action allows air bubbles to be carried away from the detection member by the flow direction, preventing bubble adhesion to the detection member and maintaining detection accuracy while enabling increased ink volume.
Data Source
AI summary
A method for manufacturing a liquid container, the liquid container including: a case having a containing section for containing liquid; a supply port for supplying the liquid from the containing section to the outside thereof; and a detection member for detecting an amount of the liquid in the containing section, wherein the containing section is divided into a first containing chamber, a second containing chamber, a third containing chamber and a fourth containing chamber in a flow of the liquid from the containing section to the supply port, the method comprising: forming an injection port on an upstream part of the flow from the fourth containing chamber, the injection port being communicated with the inside of the containing section; and injecting the liquid from the injection port.