Ink Circulation Switching for Heating Efficiency
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Solution Overview
Problem
Inkjet printing apparatuses face inefficiencies in heating and cooling ink due to the presence of both heaters and coolers, leading to degraded heating efficiency and prolonged ink temperature stabilization times, especially in low ambient temperatures.
Innovation Solution
The apparatus features separate heater and cooler side routes for ink circulation, controlled by a switch mechanism and a control unit that adjusts based on ink and ambient temperatures to optimize heating and cooling processes, allowing for independent switching of each color ink's route if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If both heater and cooler are provided in the inkjet printing apparatus, then the ink temperature can be controlled within warranty range, but the heating efficiency is degraded due to heat dissipation at the cooler
Solution Approach 1:
The ink circulation system is divided into separate heater-side and cooler-side circulation routes. The switch mechanism allows selective switching between these routes, enabling independent operation of heating and cooling functions without mutual interference. This segmentation eliminates heat dissipation losses at the cooler during heating operations.
2Temperature
If both heater and cooler are provided in the inkjet printing apparatus, then the ink temperature can be controlled within warranty range, but the circulation route becomes long and ink volume increases
Solution Approach 1:
The circulation system is segmented into distinct heater-side and cooler-side routes with separate circulation paths. This allows the ink to travel through only the necessary component (heater or cooler) based on temperature requirements, reducing overall circulation route length and ink volume compared to a single integrated route.
3Temperature
If the circulation route is long with both heater and cooler, then temperature control flexibility is improved, but the time required to heat ink to appropriate temperature increases
Solution Approach 1:
By segmenting the circulation route into separate heater-side and cooler-side paths, the ink volume in the circulation system is reduced. This reduction in ink volume decreases the thermal mass that needs to be heated, thereby reducing the time required to heat ink to the appropriate temperature while maintaining temperature control flexibility.
4Temperature
If the heater operates for longer time to heat ink, then the ink temperature reaches warranty range, but the power consumption increases
Solution Approach 1:
The separate heater-side circulation route reduces the ink volume that needs to be heated compared to a long integrated route. This reduction in heated ink volume decreases the total energy consumption of the heater while still achieving the required ink temperature for warranty compliance.
5Speed
If a high power heater is used to reduce heating time, then the ink heating speed increases, but the power supply capacity requirement increases
Solution Approach 1:
By segmenting the circulation system into separate routes, the ink volume is reduced. This allows the use of lower power heaters to achieve the same heating speed, or alternatively, enables faster heating with moderate power heaters, thereby reducing the power supply capacity requirements.
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 enhances heating efficiency, reduces power consumption, and shortens the time required to reach optimal ink temperature, enabling faster print process initiation and using lower power heaters, while maintaining print quality.
Implementation Method 1
a heater for heating ink
Implementation Method 2
a cooler for cooling ink
Implementation Method 3
heat dissipation occurs from ink at the heat sink
Data Source
AI summary
A printing apparatus is provided with a heater for heating ink and a cooler for cooling ink, and comprises: an ink circulation route including a heater side route and a cooler side route which are separately provided through the heater and the cooler respectively; a switch mechanism operable to switch the ink circulation route between the heater side route and the cooler side route; and a control unit operable to control the switch mechanism. The control unit controls the switch mechanism to switch the ink circulation route to the heater side route when the ink temperature is lower than a first reference temperature, and switch the ink circulation route to the cooler side route when the ink temperature is no lower than the first reference temperature. By this configuration, the ink heating efficiency can be improved.