Liquid Accommodation Body Circulation Filter Design
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Solution Overview
Problem
In liquid ejecting apparatuses, the quality of liquid in the accommodation body deteriorates due to mixing with filtered liquid from the circulation flow channel, leading to potential contamination and reduced printing quality.
Innovation Solution
A liquid accommodation body with a filter portion in the circulation flow channel, allowing for circulation without direct flow into the liquid accommodation portion, and a check valve to prevent backflow, along with a filter chamber configuration to minimize air bubble incorporation, ensuring the filter is filled with liquid to prevent air bubbles from entering the supply flow channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is provided in the circulation flow channel to remove foreign matter, then the liquid quality should be improved, but the filtered liquid flows back into the liquid accommodation portion and causes quality deterioration
Solution Approach 1:
The liquid accommodation body is divided into two separate flow paths: a supply flow channel for normal liquid supply to the liquid ejecting portion, and a circulation flow channel for filtering and circulating liquid. This segmentation prevents filtered liquid from returning to the accommodation portion while maintaining separate functions for each path.
Solution Approach 2:
The filter is extracted from the main supply path and placed exclusively in the circulation flow channel. This allows the filter to process liquid without its output returning to contaminate the accommodation portion, separating the filtration function from the storage function.
2Reliability
If the filter portion is not filled with liquid, then air bubbles may be incorporated in the supply flow channel during circulation, but filling it prevents proper filtration
Solution Approach 1:
The filter portion is pre-filled with liquid before the circulation operation begins. This preliminary action ensures that when circulation starts, no air bubbles are introduced into the supply flow channel, while the pre-filled liquid is ready for immediate filtration.
Solution Approach 2:
The filter portion is given a vertical orientation with the liquid level maintained above the outlet. This dimensional arrangement uses gravity to prevent air bubble incorporation while allowing liquid to flow through the filter medium effectively.
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 effectively prevents the deterioration of the liquid quality in the accommodation body, reduces air bubble incorporation, and improves the reliability of the printing process by maintaining the liquid's quality and trapping foreign matter before replacing the liquid accommodation body.
Implementation Method 1
a filter that filters the liquid that flows through the feedback flow channel
Implementation Method 2
a circulation flow channel of the liquid is formed by connecting the supply flow channel and the liquid accommodation body
Data Source
AI summary
A liquid accommodation body that is removably installed in a liquid ejecting apparatus provided with a supply flow channel that supplies a liquid to a liquid ejecting portion, and a feedback flow channel that is connected to the supply flow channel so as to form a circulation flow channel, and is provided with a liquid accommodation portion that accommodates the liquid, a lead-out flow channel that connects a lead-out port, which is connected to the supply flow channel, and the feedback flow channel, an introduction flow channel that connects an introduction port, which is connected to the feedback flow channel, and the lead-out flow channel, and a filter portion that is provided in a partial circulation flow channel, which, among portions of the lead-out flow channel and the introduction flow channel, configures the circulation flow channel, and filters the liquid.