Liquid Ejection Device Airflow Pressure Ratio Control
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Solution Overview
Problem
Existing liquid ejection devices face challenges in efficiently ejecting liquids with high energy due to droplet diffusion when the gas flow rate exceeds the liquid flow rate, leading to difficulties in precise targeting and increased droplet formation distance.
Innovation Solution
A liquid ejection device is designed with a nozzle, airflow introduction member, liquid feeding pump, and pressure pump, controlled by a processor to maintain a ratio of airflow introduction pressure to liquid ejection pressure between 0.005 and 0.11, optimizing droplet formation and preventing diffusion while minimizing droplet formation distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the flow rate of gas is increased to enhance liquid ejection energy, then the liquid droplets are diffused, but it may be difficult to eject the liquid onto the object with a large amount of energy
Solution Approach 1:
The patent applies parameter changes by controlling the ratio of gas flow rate to liquid flow rate within a specific range (0.05 to 0.5). This parameter optimization allows the system to achieve high liquid ejection energy while preventing droplet diffusion, resolving the technical contradiction between force and manufacturing precision.
2Quantity of substance
If the flow rate of liquid is increased to improve ejection volume, then the droplets are diffused, but it may be difficult to eject the liquid onto the object with a large amount of energy
Solution Approach 1:
The patent optimizes the flow rate parameters by maintaining the gas-to-liquid flow rate ratio within 0.05 to 0.5. This parameter control enables the system to eject larger volumes of liquid while preserving ejection energy, resolving the contradiction between quantity of substance and force.
3Length of moving object
If the introduction pressure of airflow is increased to reduce droplet formation distance, then the droplets are diffused
Solution Approach 1:
The patent applies parameter changes by controlling the introduction pressure of airflow relative to liquid ejection pressure within a specific ratio range. This optimized pressure ratio enables the system to minimize droplet formation distance while preventing droplet diffusion, resolving the technical contradiction between length and manufacturing precision.
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
The device effectively prevents droplet diffusion and maintains a shorter droplet formation distance, enhancing workability and efficiency in various applications by adjusting airflow introduction pressure based on ejection pressure and Reynolds number, ensuring precise liquid ejection.
Implementation Method 1
an airflow introduction member configured to introduce an airflow to the liquid
Implementation Method 2
a liquid feeding pump configured to adjust a pressure of the liquid
Implementation Method 3
a pressure pump configured to adjust an introduction pressure of the airflow introduced by the airflow introduction member
Data Source
AI summary
A liquid ejection device includes: a nozzle configured to eject a liquid; an airflow introduction member configured to introduce an airflow to the liquid; a liquid feeding pump configured to adjust a pressure of the liquid; a pressure pump configured to adjust an introduction pressure of the airflow introduced by the airflow introduction member; and a processor configured to control driving of the liquid feeding pump and the pressure pump, and the processor controls a ratio of the introduction pressure of the airflow to an ejection pressure of the liquid to be 0.005 or more and 0.11 or less.