Liquid Ejecting Head Nozzle Plate Circulation Channel Design
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Solution Overview
Problem
Existing liquid ejecting heads face difficulties in efficiently circulating liquid near nozzles to the circulation flow channel, leading to inefficiencies in ink distribution and ejection.
Innovation Solution
A liquid ejecting head design featuring a nozzle plate with first and second nozzles, pressure chambers, communication channels, and a circulating liquid chamber, where the nozzle plate includes first and second circulation channels that directly communicate with the communication channels and circulating liquid chamber, allowing for improved ink circulation and ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the circulating communication channel is formed in the communication plate, then the structure is simplified, but the liquid circulation efficiency near the nozzle is insufficient
Solution Approach 1:
The circulation channel is repositioned from the communication plate to the nozzle plate, changing the spatial dimension and location of the circulation path. This dimensional reconfiguration allows the circulation channel to be formed directly adjacent to the nozzle opening, dramatically improving liquid circulation efficiency near the nozzle while maintaining structural simplicity through the single-plate integration
2Ease of operation
If separate circulating liquid chambers are provided for each circulation channel, then the circulation control is improved, but the device complexity increases
Solution Approach 1:
Multiple circulation channels communicate with a single common circulating liquid chamber instead of requiring separate chambers for each channel. This merging approach maintains effective circulation control across all nozzles while significantly reducing device complexity by eliminating redundant chamber structures
Solution Approach 2:
The single circulating liquid chamber serves multiple functions by receiving circulated liquid from all circulation channels simultaneously. This universal chamber design allows one component to perform the circulation collection function for multiple nozzles, reducing overall system complexity while maintaining operational effectiveness
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 design enhances the efficiency of ink circulation and ejection by simplifying the configuration and optimizing flow channel resistance, ensuring both adequate circulation and ejection amounts.
Implementation Method 1
a pressure generating unit that generates a pressure change in each of the first pressure chamber and the second pressure chamber
Data Source
AI summary
A liquid in the vicinity of a nozzle is efficiently circulated. A liquid ejecting head includes: a nozzle plate provided with a first nozzle; a flow channel forming unit provided with a first pressure, a first communication channel through which the first nozzle and the first pressure chamber communicate with each other, and a circulating liquid chamber. The nozzle plate is provided with a first circulation channel through which the first communication channel and the circulating liquid chamber communicate with each other.