Drying Device Airflow Control for Condensation Prevention
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Solution Overview
Problem
Existing drying devices face challenges in efficiently drying printed media while preventing condensation, as heated air with increased humidity can lead to condensation risks when circulated.
Innovation Solution
A drying device with a support portion, heating unit, flow path member, air blowing unit, and control unit that adjusts air flow rates, where the outflow portion is positioned lower than the inflow port, allowing for efficient air circulation and humidity management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If heated dry air is circulated through the drying chamber, then the drying chamber can be efficiently warmed, but when the dry air whose humidity has increased after drying the recording medium is circulated, there is a risk that condensation may occur
Solution Approach 1:
The air blowing unit operates in periodic cycles, switching between high-speed operation during drying to discharge humid air, and low-speed operation during warming to prevent condensation. This periodic adjustment of air flow rate resolves the contradiction between heating efficiency and condensation prevention by applying different air circulation strategies at different operational stages
Solution Approach 2:
The air flow rate is dynamically adjusted based on operational conditions. The control unit changes the rotation speed of the air blowing unit according to whether the drying chamber is in warming mode or drying mode, optimizing both heating efficiency and preventing harmful condensation effects
2Reliability
If the air flow rate is increased to discharge humid air quickly, then condensation risk is reduced, but energy efficiency decreases due to excessive air circulation
Solution Approach 1:
The system applies partial action by using high air flow rate only when necessary (during drying operations), and low air flow rate during warming operations. This selective application of air circulation intensity prevents energy waste while maintaining condensation prevention when needed
Solution Approach 2:
The air flow rate parameter is changed based on operational phase. The control unit adjusts the rotation speed of the air blowing unit to match the current operational requirements, optimizing the balance between condensation prevention and energy efficiency
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 reduces condensation risks while efficiently warming the drying chamber, ensuring effective drying of printed media by controlling air flow rates based on temperature thresholds.
Implementation Method 1
a heating unit provided in a drying chamber for drying the medium supported by the support portion
Implementation Method 2
an air blowing unit configured to supply air, flowing from the inflow port into the air flow path, to the drying chamber and cause the air to flow out of an outflow portion of the drying chamber
Implementation Method 3
a drying device that dries a printed medium
Data Source
AI summary
A drying device includes a support portion that supports a printed medium, a heating unit provided in a drying chamber for drying the medium supported by the support portion, a flow path member that forms an air flow path connecting an inflow port that opens downward in the vertical direction and the drying chamber, an air blowing unit that supplies, to the drying chamber, air flowing from the inflow port into the air flow path and causes the air to flow out of an outflow portion of the drying chamber, and a control unit that controls driving of the air blowing unit. The outflow portion is positioned lower than the inflow port in the vertical direction, and the control unit controls the driving of the air blowing unit to change an air flow rate of the air supplied to the drying chamber.