Liquid Discharge Head Temperature Control via Partition Wall
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Solution Overview
Problem
Liquid discharge heads face challenges in maintaining stable discharge characteristics due to changes in liquid viscosity and temperature, which affect the accuracy and stability of the discharge process.
Innovation Solution
A liquid discharge head with a common chamber, temperature detector, and temperature controller is designed to regulate the temperature of the liquid across individual chambers, using a temperature-adjustment fluid to stabilize the liquid's physical properties and ensure accurate discharge, even when viscosity or surface tension varies with temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature control is implemented using a temperature detector and controller, then discharge stability is improved, but device complexity increases
Solution Approach 1:
A partition wall is introduced as an intermediary structure to thermally isolate the common chamber from individual chambers. This allows the temperature detector to measure the temperature of the liquid in the common chamber without being directly influenced by temperature variations in the individual chambers, thereby improving discharge stability while adding minimal structural complexity.
Solution Approach 2:
The common chamber is segmented from individual chambers using a partition wall, creating distinct thermal zones. This segmentation enables independent temperature monitoring and control of the common chamber, improving overall discharge stability by preventing thermal interference between chambers.
2Measurement precision
If the temperature detector is placed in the common chamber, then temperature detection accuracy is improved, but thermal interference from heating/cooling channels increases
Solution Approach 1:
The partition wall acts as a thermal intermediary that isolates the temperature detector in the common chamber from the heating and cooling channels in individual chambers. This allows accurate temperature detection in the common chamber while blocking harmful thermal interference from the temperature control channels.
Solution Approach 2:
The temperature detection function is extracted from the individual chambers and placed in the common chamber, where it can operate without direct thermal interference from the heating and cooling channels. This extraction improves measurement precision by removing the detector from the thermal interference zone.
3Adaptability or versatility
If heating and cooling channels are provided in individual chambers, then temperature control capability is improved, but structural complexity increases
Solution Approach 1:
Heating and cooling channels are merged into a single integrated temperature control system within each individual chamber. This combination provides versatile temperature control capability while minimizing structural complexity by consolidating multiple functions into unified channel structures.
Solution Approach 2:
The heating and cooling channels in each individual chamber serve multiple functions: they can independently heat or cool the liquid, and their effects are collectively regulated by the central temperature control system. This multi-functionality improves adaptability while managing structural complexity through shared control mechanisms.
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 configuration allows for stable and accurate liquid discharge by controlling temperature fluctuations, enhancing the reliability of the discharge process and improving the accuracy of temperature detection, even when using liquids with temperature-dependent properties.
Implementation Method 1
a temperature controller connected to the temperature detector, to heat or cool the liquid in the common chamber based on readings from the temperature detector
Implementation Method 2
a temperature detector to detect temperature of the liquid
Implementation Method 3
using a temperature-adjustment fluid to stabilize the liquid's physical properties
Data Source
AI summary
A liquid discharge head includes a plurality of individual chambers communicating with a plurality of nozzles that discharges a liquid, a common chamber formed by a frame and communicating with the plurality of individual chambers, a temperature detector to detect temperature of the liquid, and a temperature controller connected to the temperature detector, to heat or cool the liquid in the common chamber based on readings from the temperature detector. The temperature detector is disposed opposite the common chamber across the plurality of individual chambers in a direction perpendicular to a direction of liquid discharge from the plurality of nozzles.