Ink Jet Dryer Door Interlock for Safe Temperature-Controlled Access
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Solution Overview
Problem
Existing ink jet recording apparatuses pose safety risks when users are allowed to open maintenance doors without ensuring that the internal components, particularly the drying portion, have cooled to a safe temperature, potentially exposing them to high temperatures.
Innovation Solution
The apparatus includes a control system that monitors internal temperatures and uses an exhaust fan to lower the temperature before unlocking maintenance doors, ensuring safety by preventing door opening until the temperature reaches a safe level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the door is locked to prevent unauthorized opening, then user safety is improved, but ease of operation deteriorates
Solution Approach 1:
The control portion performs preliminary cooling action by operating the exhaust fan before unlocking the door. The system automatically cools the drying portion to a safe temperature threshold before enabling door opening, ensuring user safety while maintaining operational convenience through automated temperature monitoring and controlled unlocking.
2Temperature
If the exhaust fan operates continuously to cool the casing, then temperature safety is improved, but energy consumption increases
Solution Approach 1:
The exhaust fan operates periodically rather than continuously. The control portion activates the exhaust fan when the temperature sensor detects that the casing temperature reaches a predetermined threshold, and deactivates it when the temperature drops below the threshold. This periodic operation maintains safe temperatures while minimizing energy consumption compared to continuous operation.
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 solution enhances user safety by preventing door opening until the internal components are cool, thereby improving operational efficiency by minimizing downtime and reducing the risk of burns.
Implementation Method 1
a drying portion including a heater and a blowing fan blowing air toward the conveyance portion and configured to dry the ink by blowing air heated by the heater to the recording material conveyed by the conveyance portion
Implementation Method 2
an exhaust fan configured to exhaust air in the casing to an outside of the casing and to be controlled to an operation state and a stop state based on a detection result of the temperature sensor
Data Source
AI summary
An ink jet recording apparatus includes a conveyance portion, a drying portion including a heater and a blowing fan, a casing, a temperature sensor, an exhaust fan configured to exhaust air in the casing, a door provided to be opened and closed on the casing, a lock mechanism configured to lock the door to the casing in a closed state, and a control portion. In a case where the control portion receives an instruction to unlock the door locked by the lock mechanism, the control portion is configured to stop heating of the air by the heater, start an operation of the exhaust fan when the exhaust fan is stopped, continue the operation of the exhaust fan when the exhaust fan is in operation, and unlock the door locked by the lock mechanism after the temperature in the casing reaches a predetermined temperature or lower.