Suction Unit Arc Wall Swirling Flow for Ink Mist Adhesion
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Solution Overview
Problem
In printing apparatuses, mist of ink components that do not land on the medium can adhere to the printheads, leading to reduced ink discharge performance, and existing solutions like blowing air into the collection passage have limitations in effectively preventing this adhesion.
Innovation Solution
A discharge apparatus with a suction unit featuring an arc-shaped inner wall surface and a gas supply unit that blows air towards the inner wall surface to prevent mist adhesion, creating a swirling flow that effectively collects and removes mist from the collection passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If air is blown into the passage to suppress mist adhesion, then mist adhesion is reduced, but the effectiveness is insufficient and maintenance needs remain high
Solution Approach 1:
The suction groove is designed with an arc-shaped inner wall surface instead of a straight or angular shape. This curvature enables the gas flow to follow the wall surface more effectively, creating a swirling flow pattern that enhances the protective gas barrier against mist adhesion throughout the entire passage surface.
Solution Approach 2:
The invention utilizes gas flow dynamics by supplying gas toward the arc-shaped inner wall surface to create a swirling flow. This pneumatic approach generates a vortex that maintains continuous gas contact with the passage walls, effectively preventing mist adhesion through fluid dynamic forces rather than passive structural design.
2Object-affected harmful factors
If a simple passage structure is used, then device complexity is reduced, but mist adhesion cannot be effectively prevented
Solution Approach 1:
The suction groove incorporates an arc-shaped inner wall surface that curves along the flow direction. This simple curved geometry modification to the passage structure enables effective swirling flow generation and mist adhesion prevention without requiring complex multi-component systems or additional mechanical elements.
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 solution effectively suppresses mist adhesion to the collection passage, reducing maintenance needs and ensuring consistent ink discharge performance by utilizing a swirling airflow to prevent mist from contacting the inner walls of the suction groove.
Implementation Method 1
a suction groove including an arc-shaped inner wall surface inside the opening and configured to suck mist on the medium, and a supply unit configured to supply a gas to the suction unit, wherein the suction unit includes an outlet portion configured to blow out the gas supplied from the supply unit toward the inner wall surface in the opening
Data Source
AI summary
A discharge apparatus includes a discharge unit configured to discharge a liquid to a medium, a suction unit, and a supply unit configured to supply a gas to the suction unit. The suction unit includes an opening facing the medium, and a suction groove including an arc-shaped inner wall surface inside the opening and configured to suck mist around the medium. An outlet portion configured to blow out the gas supplied from the supply unit toward the inner wall surface is provided in the opening.