Liquid Ejecting Unit Segmented Pressure Cleaning
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Solution Overview
Problem
Existing liquid ejecting units require high drive power to generate sufficient pressure for cleaning multiple ejection opening rows, leading to ineffective pressure cleaning due to insufficient inner pressure in passages and ejection openings.
Innovation Solution
The liquid ejecting unit is designed with a configuration of four chambers and passages, where two types of liquids are supplied through separate liquid and fluid passages, allowing for efficient pressure cleaning with reduced drive power by minimizing the number of ejection openings supplied at once, and using flexible sections and sealing valves to control fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressure cleaning is performed for multiple ejection opening rows simultaneously, then cleaning coverage is improved, but drive power requirement increases and pressure becomes insufficient
Solution Approach 1:
The invention divides the ejection opening rows into two separate groups, with each group having its own dedicated liquid passage. This segmentation allows pressure cleaning to be performed on one group at a time, reducing the required drive power while maintaining effective cleaning pressure in each passage.
Solution Approach 2:
Each liquid passage is equipped with sealing valves that can selectively open or close specific ejection opening rows. This local control allows the system to focus pressure cleaning on one group of ejection openings at a time, ensuring sufficient pressure is maintained in each passage without requiring excessive drive power.
2Adaptability or versatility
If two types of liquid are used in a liquid ejecting unit, then functionality is improved, but device complexity increases
Solution Approach 1:
The invention divides the liquid passage system into two separate, independent passage systems - one for the first type of liquid and another for the second type of liquid. Each passage system includes its own liquid supply, passages, and sealing valves, allowing both liquid types to be managed independently while maintaining system functionality.
Solution Approach 2:
Each liquid passage system is designed to be multi-functional, capable of performing both normal ejection operations and pressure cleaning operations. The sealing valves in each passage can selectively control fluid flow for different purposes, allowing a single passage system to handle multiple functions without requiring separate dedicated passages for each function.
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 enables effective pressure cleaning with lower drive power by ensuring adequate pressure is maintained in the liquid passages, reducing pressure loss and improving the flow rate of liquids during cleaning.
Implementation Method 1
Through this gas flow passage, the inner pressure of a bag-shaped member disposed in the upper portion of the storage space is increased
Implementation Method 2
pressurized liquid is supplied to the passage and the ejection openings through the fluid passage and the supply passage
Data Source
AI summary
A liquid ejecting unit includes: a first chamber; a second chamber; a third chamber; a fourth chamber; a first liquid passage for supplying a first type of liquid to the first chamber and the third chamber; a second liquid passage for supplying a second type of liquid to the second chamber and the fourth chamber, the second type of liquid differing from the first type of liquid; a first fluid passage for supplying fluid to the first chamber and the second chamber; and a second fluid passage for supplying the fluid to the third chamber and the fourth chamber.