Deformable Partition Wall Liquid Discharge Head
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Solution Overview
Problem
Existing liquid discharge heads face inefficiencies in discharge speed and stability due to uncontrolled liquid flow and viscosity changes, particularly in circulation-type heads where liquid is recirculated, leading to reduced performance and increased risk of bubble formation and property changes.
Innovation Solution
A liquid discharge head design incorporating piezoelectric actuators and a deformation unit that controls the flow amount of liquid delivery channels by adjusting the channel portion's cross-sectional area and generating pressure waves, enhancing fluid resistance and discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If liquid is recirculated in circulation-type heads, then liquid property changes are reduced, but discharge speed decreases and viscosity changes occur
Solution Approach 1:
The partition wall is made deformable rather than fixed, allowing dynamic adjustment of the liquid delivery channel's cross-sectional area. This enables the system to adapt liquid flow resistance in real-time, improving discharge speed while maintaining liquid property stability through controlled circulation.
Solution Approach 2:
The cross-sectional area of the liquid delivery channel is changed by deforming the partition wall. This parameter change allows control over liquid flow resistance, enabling optimization of both discharge speed and liquid property stability by adjusting the channel geometry dynamically.
2Speed
If liquid flow is increased to improve discharge speed, then viscosity changes and bubble formation increase
Solution Approach 1:
The deformable partition wall provides feedback control of liquid flow. By monitoring discharge requirements, the system adjusts the partition wall deformation to control liquid delivery channel resistance, ensuring stable discharge without excessive flow that would cause viscosity changes or bubbles.
Solution Approach 2:
The dynamic deformability of the partition wall allows real-time adjustment of liquid flow characteristics. This enables the system to maintain optimal flow conditions that prevent bubble formation and viscosity changes while achieving high discharge speeds.
3Speed
If the liquid delivery channel cross-sectional area is increased to reduce fluid resistance, then discharge speed improves, but liquid circulation control becomes less stable
Solution Approach 1:
The partition wall's deformability enables dynamic control of the liquid delivery channel cross-sectional area. This allows the system to optimize channel area for high discharge speed while maintaining circulation stability through active adjustment, rather than relying on fixed geometric design.
Solution Approach 2:
By changing the cross-sectional area parameter of the liquid delivery channel through partition wall deformation, the system achieves low fluid resistance for high discharge speed while maintaining circulation stability through controlled parameter adjustment.
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 significantly improves discharge speed and efficiency by managing fluid resistance and pressure waves, reducing viscosity changes and maintaining stable liquid circulation, thereby enhancing the overall performance of the liquid discharge head.
Implementation Method 1
a plurality of piezoelectric actuators 12A, 12B; The deformation unit deforms at least a portion of the channel portion
Implementation Method 2
generating pressure waves, enhancing fluid resistance and discharge efficiency
Data Source
AI summary
A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a plurality of liquid delivery channels, and a deformation unit. The plurality of nozzles discharges liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The plurality of liquid delivery channels is communicated with the plurality of individual liquid chambers. Each of the plurality of liquid delivery channels includes a channel portion at a partition wall between adjacent individual liquid chambers of the plurality of individual liquid chambers. The deformation unit deforms at least a portion of the channel portion.