Inkjet Printer Dryer Airflow and Heating Mechanism
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Solution Overview
Problem
Water-based ink used in inkjet printers takes a long time to dry due to its high water content, leading to delayed drying on the recording medium and potential image quality degradation when conventional dryers are used.
Innovation Solution
An inkjet printer with a specialized dryer system that includes a main body case with partitioned chambers, multiple fans, and a heater, which draws air from outside, heats it, and directs it in a way that accelerates the drying of water-based ink on both the platen and guide surfaces, ensuring efficient airflow and temperature control to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based ink is used for environmental and health benefits, then environmental and health aspects are improved, but drying time increases significantly
Solution Approach 1:
The invention changes the physical parameters of the drying environment by introducing heated air flow. The dryer includes a heater that heats air and fans that circulate the heated air over the recording medium, thereby accelerating the evaporation of water from water-based ink without changing the ink composition itself.
Solution Approach 2:
The invention uses pneumatic principles by employing fans to generate air flow and a heater to heat the air. The heated air flow is directed onto the recording medium to accelerate drying. This pneumatic-thermal approach removes water from the ink faster while preserving the environmental benefits of water-based ink.
2Productivity
If conventional dryer with single fan is used to accelerate drying, then drying speed is improved, but image quality degrades due to insufficient drying before conveyance
Solution Approach 1:
The dryer is segmented into multiple functional chambers: a first chamber with a first fan for initial air circulation, and a second chamber with a second fan and heater for heated air drying. This segmentation allows different drying stages to occur in separate zones, ensuring both speed and quality.
Solution Approach 2:
The invention ensures continuous drying action by having multiple fans operating in sequence. The first fan prepares the air flow, then the second fan delivers heated air to the recording medium. This continuous multi-stage process ensures ink is sufficiently dried before the medium leaves the dryer, preventing image quality degradation.
3Productivity
If high heat is applied to accelerate water-based ink drying, then drying speed is improved, but risk of overheating and ink quality degradation increases
Solution Approach 1:
The invention carefully controls the thermal parameters by using a heater that provides gentle, sustained heat rather than high-intensity heat. The air is heated to a moderate temperature and circulated continuously, achieving effective drying without subjecting the ink to excessive heat that could cause degradation.
Solution Approach 2:
The invention uses pneumatic circulation to distribute heat evenly. Fans move heated air continuously over the recording medium, preventing localized overheating. This air flow mechanism ensures uniform drying across the entire ink area while maintaining temperatures that preserve ink quality.
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 effectively accelerates the drying of water-based ink on both the platen and guide surfaces, improving image quality and preventing nozzle clogging by maintaining optimal drying conditions without degrading the ink's quality.
Implementation Method 1
a heater provided in the second chamber to heat air that is sent by the second fan
Implementation Method 2
a dryer with a heater, a fan, or the like, to dry the ink dispensed onto the recording medium
Data Source
AI summary
A printer includes a dryer to send an airflow toward a recording medium. The dryer includes a first fan, a second fan, a heater, a first intake port, a first exhaust port with an opening facing toward a platen, a second intake port with an opening facing toward a guide, and a second exhaust port with an opening facing toward the guide. The first fan is operable to draw air through the first intake port, and discharge air toward the platen through the first exhaust port. The second fan is operable to draw air through the second intake port, and discharge air that has been heated by the heater through the second exhaust port.