Drying Device Hot Air Blowing Unit Temperature Control
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Solution Overview
Problem
Drying devices face challenges in maintaining the service life of their blowing mechanisms due to temperature fluctuations, which can lead to deterioration when hot air temperatures approach the specification temperature of the mechanism, especially when handling media with varying heat resistance.
Innovation Solution
A drying device with a conveying unit, a hot air blowing unit, and a heating unit, featuring a circulation path and an adjusting unit that controls the amount of air supplied to the blowing unit by adjusting the exhaust portion, allowing for temperature regulation to prevent overheating and extend the service life of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the temperature of hot air is increased to improve drying speed and throughput, then productivity is improved, but the service life of the blowing mechanism deteriorates due to overheating
Solution Approach 1:
The patent introduces an adjusting unit that dynamically changes the opening amount of the exhaust portion based on the set temperature. When the set temperature is high, the exhaust opening is increased to allow more air outside the circulation path to enter, preventing the blowing mechanism from overheating while still achieving high-temperature drying when needed.
2Reliability
If the temperature of hot air is decreased to protect the blowing mechanism, then the service life is extended, but the drying efficiency and throughput deteriorate
Solution Approach 1:
The patent makes the exhaust opening dynamically adjustable rather than fixed. The adjusting unit changes the opening amount according to the set temperature, allowing the system to adapt between high-temperature operation (when productivity is prioritized) and low-temperature operation (when reliability is prioritized), resolving the static trade-off between these two parameters.
3Use of energy by stationary object
If hot air circulation is increased to save heater power, then energy consumption is reduced, but the blowing mechanism temperature increases causing deterioration
Solution Approach 1:
The patent implements a feedback control mechanism where the adjusting unit responds to the set temperature by adjusting the exhaust opening. This creates a balance between circulating hot air (for energy saving) and introducing fresh air (for cooling the blowing mechanism), allowing the system to maintain energy efficiency while preventing overheating through active temperature-based control.
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 prevents the deterioration of the blowing mechanism by maintaining the air temperature below the specification temperature, thereby extending the service life and reducing power consumption, while ensuring efficient drying of the medium.
Implementation Method 1
a heating unit configured to heat air blown from the blowing unit
Implementation Method 2
a circulation path through which air blown from the hot air blowing unit is to be circulated
Data Source
AI summary
A drying device includes a conveying unit to convey a medium to which liquid is discharged from a discharging head, a hot air blowing unit, a passage forming unit, and an adjusting unit. The hot air blowing unit includes a blowing unit, and a heating unit. The passage forming unit forms, between the hot air blowing unit and a region on a conveyance path of the conveying unit, a circulation path through which air blown from the hot air blowing unit is to be circulated. The adjusting unit adjusts an amount of air outside the circulation path that is supplied to the blowing unit. The circulation path includes an introduction portion, and an exhaust portion. The adjusting unit includes a movable member that changes an exhaust portion opening amount.