Inkjet Drying Device Vapor Extraction Mechanism
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Solution Overview
Problem
Conventional drying devices in inkjet printers face inefficiencies due to limited temperature of the front paper guide and increased humidity from vapor retention, which hinder ink drying efficiency.
Innovation Solution
A drying device design featuring a medium guide part, a heating body, a cover forming an air flow path, a fan to generate airflow, and a duct to discharge vapor, with air intake ports positioned downstream of the heating body to prevent cooling of the medium guide part and enhance ink drying efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the front paper guide is surrounded by a cover to increase temperature and prevent contact, then the temperature of the front paper guide can become sufficiently high and operator safety is improved, but vapor generated during ink drying stays between the front paper guide and the cover causing humidity increase and reduced ink drying efficiency
Solution Approach 1:
The drying chamber is segmented into distinct zones: a heating zone with the front paper guide and planar heater, and a vapor discharge zone with the duct and fan. This segmentation allows the front paper guide to be heated to high temperatures for effective drying while the vapor is actively removed through the duct, preventing humidity buildup and maintaining high ink drying efficiency throughout the process
Solution Approach 2:
The vapor generated during ink drying is extracted from the drying chamber using a dedicated duct and fan system. The duct is positioned to capture vapor rising from the front paper guide, and the fan actively draws this vapor outward, removing it from the drying environment. This extraction prevents vapor accumulation and humidity increase, thereby maintaining high ink drying efficiency while allowing the front paper guide to operate at sufficiently high temperatures
2Productivity
If a fan is used to discharge vapor outside the inkjet printer, then ink drying efficiency can be increased by removing vapor, but the air flow formed by the fan cools the front paper guide reducing drying efficiency
Solution Approach 1:
The duct serves as an intermediary structure that captures vapor at its source near the front paper guide and transports it away through a controlled path. The duct is positioned and configured to intercept vapor before it can significantly cool the front paper guide, and the fan is located at the duct outlet to provide discharge power. This intermediary arrangement allows vapor removal while minimizing the cooling effect on the front paper guide, as the air flow from the fan acts on the vapor in the duct rather than directly on the heated surface
Solution Approach 2:
The duct is positioned to capture vapor at the earliest stage of its generation, immediately as it rises from the front paper guide. By intercepting vapor early in its formation and transport it away through the duct before it can significantly cool the front paper guide, the system maintains high temperature conditions for effective drying while still achieving vapor removal through the fan at the duct outlet
3Device complexity
If the front paper guide is exposed to outside of the inkjet printer, then the structure is simpler and easier to access, but the temperature of the front paper guide cannot be sufficiently high and the drying time is long
Solution Approach 1:
The drying chamber is enclosed by a cover that forms a flexible boundary around the front paper guide and planar heater. This enclosure creates a controlled thermal environment that traps heat and allows the front paper guide to reach sufficiently high temperatures for fast drying. The cover can be made of thermally insulating material to retain heat while still allowing the relatively simple structure to be accessed when needed, thus reducing drying time without excessive structural complexity
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 increases ink drying efficiency by maintaining the medium guide part at a higher temperature and preventing humidity buildup, allowing for faster and more efficient drying of ink on the recording medium.
Implementation Method 1
a heating body that heats the medium guide part
Implementation Method 2
a fan that generates an air flow into the air flow path such that air contained inside the air flow path runs in a flow direction of the air
Implementation Method 3
a duct that is configured to discharge the air in the air flow path together with a vapor generated as the recording medium is heated
Data Source
AI summary
A drying device for drying a recording medium includes a medium guide part that guides the recording medium; a heating body that heats the medium guide part; a cover that is arranged opposing the medium guide part such that the medium carrying path intervenes between the cover and the medium guide part and an air flow path is formed with the medium guide part and the cover; a fan that generates an air flow; and (e) a duct that is configured to discharge the air in the air flow path together with a vapor generated as the recording medium is heated, wherein an air intake port that takes the air in the air flow path into the duct is formed on the downstream side of the flow direction with resect to the heating body.