Inkjet Head Thermal Management via Heat Dissipation Plate
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Solution Overview
Problem
The heat generated by the driving substrate in inkjet recording devices causes ink viscosity to decrease and nozzle expansion, leading to poor image quality due to heat transmission and positional changes.
Innovation Solution
An inkjet head design where the ink tank functions as a heat sink, dissipating heat from the driving substrate and discharging it outside, while also efficiently guiding ink flow to prevent heat-induced ink ejection issues and nozzle misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving substrate is positioned close to the ink ejector for compact design, then device integration is improved, but heat transmission to the ink causes viscosity decrease and ejection failure
Solution Approach 1:
A heat dissipation plate is introduced as an intermediary component between the driving substrate and the ink ejector. This plate serves as a thermal barrier that blocks heat transmission from the driving substrate to the ink, while still allowing the compact integrated design to be maintained. The heat dissipation plate is specifically positioned to cover the ink ejector opening, creating a protective barrier against thermal effects.
Solution Approach 2:
The driving substrate's heat, which originally causes harmful effects on the ink, is redirected to be useful for heating the ink tank. By positioning the heat dissipation plate to cover both the ink ejector and the ink tank, the heat that would otherwise damage the ink is instead used to maintain optimal ink temperature in the tank, converting a harmful thermal effect into a beneficial one.
2Power
If the driving substrate generates heat during operation, then driving circuit functionality is maintained, but nozzle expansion occurs causing positional changes and image quality degradation
Solution Approach 1:
The heat dissipation plate acts as a physical barrier and thermal mediator between the driving substrate and the ink ejector components. It selectively blocks heat from reaching the ink ejector and nozzles, preventing thermal expansion and positional drift, while allowing the driving circuit to continue operating with full functionality.
3Temperature
If heat is transmitted to the ink in the ink ejector, then thermal energy transfer occurs, but ink viscosity decreases leading to ejection failure
Solution Approach 1:
The heat dissipation plate is positioned as a thermal barrier between the heat source (driving substrate) and the ink ejector. This intermediary structure blocks the transmission of thermal energy to the ink, maintaining stable ink viscosity and ensuring reliable ejection performance.
Solution Approach 2:
The heat that would otherwise harmfully increase ink temperature and decrease viscosity is redirected to usefully heat the ink in the ink tank, maintaining optimal ink properties for ejection while preventing harmful thermal effects at the ejection point.
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
Effectively suppresses the decrease in image quality by managing heat dissipation and maintaining stable ink ejection, ensuring consistent nozzle positioning and improved image quality.
Implementation Method 1
a heat dissipation plate which blocks heat from the driving substrate from reaching the ink ejector
Implementation Method 2
heat dissipation plate which blocks heat from the driving substrate from reaching the ink ejector and dissipates the heat to the outside
Data Source
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AI summary
Provided are an inkjet head and an inkjet recording device with which it is possible to effectively suppress image quality reduction caused by the heat of a drive substrate. The inkjet head comprises: an ink discharge unit in which the opening of a nozzle that discharges ink is provided to an ink discharge surface, the ink discharge unit having an operation element that performs an operation for discharging ink from the opening of the nozzle; a drive substrate in which a drive circuit is provided for driving the operation element; and an ink tank in which ink supplied to the ink discharge unit is stored, the ink tank being provided in an aspect in which a prescribed surface of the outer surface of the ink tank is provided along the drive substrate, and the heat of the drive substrate is propagated to the prescribed surface.