Liquid Vessel Filter and Low Pressure Chamber Design

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Solution Overview

Problem

Existing liquid containing vessels, such as ink vessels for inkjet printers, face challenges in preventing the flow of bubbles and foreign matter from the liquid chamber, as these contaminants can be generated over time due to chemical changes and pressure variations, leading to ink quality issues.

Innovation Solution

A liquid containing vessel design incorporating a filter chamber with a filter and a low pressure chamber, where the low pressure chamber is positioned to maximize its overlap with the filter chamber, allowing bubbles and foreign matter to be effectively removed, and the filter chamber is configured to facilitate easy liquid flow while minimizing liquid loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a low pressure chamber is provided in the ink chamber to absorb bubbles, then bubbles can be removed from the liquid, but foreign matter other than bubbles cannot be removed and may flow out with the liquid

Engineering Contradiction:
Improvebubble removal capabilityVSAvoidforeign matter contamination
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The liquid containing chamber is divided into functionally independent sections: a filter chamber equipped with a filter for removing foreign matter, and a low pressure chamber for removing bubbles. This segmentation allows each chamber to specialize in removing one type of contaminant without interfering with the other function.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A filter is introduced as an intermediary component in the liquid flow path between the liquid containing chamber and the outlet. The filter acts as a mediator that captures foreign matter particles while allowing the liquid and bubbles to pass through to the low pressure chamber for further processing.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the filter chamber and low pressure chamber are made separate and large, then both bubbles and foreign matter can be removed effectively, but the overall volume of the liquid containing vessel increases

Engineering Contradiction:
Improvecontaminant removal effectivenessVSAvoidvessel volume
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The filter chamber and low pressure chamber are merged into a single integrated liquid containing chamber structure, sharing common walls and space. This combining allows both functional zones to coexist in a compact arrangement, reducing the overall vessel volume while maintaining both filtering and bubble removal capabilities.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The filter chamber and low pressure chamber are arranged in a nested or overlapping configuration where one chamber is partially positioned within or adjacent to the other. This nesting approach maximizes space utilization and minimizes the total volume occupied by both chambers.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Ease of operation

If the liquid inflow region is positioned to maximize gravity-assisted flow, then liquid flows easily into the filter chamber, but the chamber may not effectively capture all foreign matter

Engineering Contradiction:
Improveliquid flow efficiencyVSAvoidforeign matter capture effectiveness
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The liquid inflow region is positioned at a specific location within the filter chamber optimized for gravity-assisted flow, while the filter element is strategically placed to intercept liquid at multiple points. This local optimization ensures that fast-flowing regions provide efficient liquid intake while filter positions are arranged to capture foreign matter regardless of flow velocity variations.

Inventive Principle:
Principle #3Local quality

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 suppresses the flow of bubbles and foreign matter from the liquid containing chamber, ensuring consistent ink quality by removing contaminants and reducing the volume required for the filter and low pressure chambers, while allowing for easy replacement and maintenance.

Implementation Method 1

a low pressure chamber with a pressure that is lower than atmospheric pressure

Methodology Applied
Scientific EffectPressure difference: Pressure Gradient

Implementation Method 2

a filter chamber with a filter through which the liquid is configured to pass

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 3

a low pressure chamber having a pressure that is lower than atmospheric pressure

Methodology Applied
Scientific EffectPressure reduction: Depressurisation

Data Source

PatentUS9186902B2Liquid containing vessel
Publication Date: 2015.11.17 SEIKO EPSON CORP
  • US9186902B2 patent drawing
  • US9186902B2 patent drawing
  • US9186902B2 patent drawing

AI summary

A liquid containing vessel includes a liquid containing chamber configured to contain a liquid. The liquid containing chamber has a filter chamber with a filter through which the liquid is configured to pass, and a low pressure chamber having a pressure that is lower than atmospheric pressure.