Inkjet Recording Device Suction Control for Atmospheric Pressure
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Solution Overview
Problem
Existing recording devices face ink non-discharge issues due to insufficient ink filling in low atmospheric pressure environments, leading to increased ink consumption and air bubble accumulation, as the suction operation is not effectively controlled across varying pressure conditions.
Innovation Solution
A recording device with a control unit that adjusts the suction operation based on environmental atmospheric pressure, using a valve closing suction method to ensure adequate ink filling and air removal, thereby preventing ink non-discharge while minimizing ink consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction operation is performed with a fixed ink amount in any pressure environment, then the ink filling is sufficient in high altitude areas, but the ink consumption increases unnecessarily in low altitude areas
Solution Approach 1:
The patent applies dynamics by making the suction operation parameters variable rather than fixed. The control unit dynamically adjusts the suction operation based on real-time atmospheric pressure detection, changing the ink amount to be sucked according to the detected pressure conditions. This resolves the contradiction by adapting the fixed procedure to varying environmental conditions.
Solution Approach 2:
The patent changes the parameter of ink amount to be sucked based on atmospheric pressure. The control unit modifies this critical parameter according to the pressure detection results, ensuring optimal ink filling in high altitude areas while preventing unnecessary ink consumption in low altitude areas, thus resolving the technical contradiction.
2Reliability
If the suction operation is performed with a fixed timing in any pressure environment, then the air bubble accumulation is prevented in high altitude areas, but the ink consumption increases unnecessarily in low altitude areas
Solution Approach 1:
The patent applies dynamics by making the suction operation timing variable rather than fixed. The control unit dynamically adjusts the timing based on real-time atmospheric pressure detection, changing when the suction operation starts and ends according to the detected pressure conditions. This resolves the contradiction by adapting the fixed timing procedure to varying environmental conditions.
Solution Approach 2:
The patent changes the parameter of operation timing based on atmospheric pressure. The control unit modifies timing parameters such as start time, duration, and frequency of suction operations according to the pressure detection results, ensuring effective air bubble prevention while avoiding unnecessary operations that would increase ink consumption.
3Reliability
If the suction operation is performed with a fixed duration in any pressure environment, then the ink filling is adequate in high altitude areas, but the ink consumption increases unnecessarily in low altitude areas
Solution Approach 1:
The patent applies dynamics by making the suction operation duration variable rather than fixed. The control unit dynamically adjusts the duration based on real-time atmospheric pressure detection, changing how long the suction operation lasts according to the detected pressure conditions. This resolves the contradiction by adapting the fixed duration procedure to varying environmental conditions.
Solution Approach 2:
The patent changes the parameter of operation duration based on atmospheric pressure. The control unit modifies the duration parameter of suction operations according to the pressure detection results, ensuring adequate ink filling in high altitude areas while preventing unnecessary ink consumption in low altitude areas through optimized timing.
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 ink non-discharge by optimizing ink filling and air removal processes across different pressure environments, reducing ink consumption and ensuring reliable recording performance.
Implementation Method 1
The pump is configured to make a pressure of an inside of the cap negative in a state where the cap covers the discharge port surface
Data Source
AI summary
A recording device including a recording head, a tank, a valve capable of being switched between an open state where ink is supplied from the tank to the recording head and a closed state where the ink is not supplied, a cap covering a discharge port surface, a pump configured to make a pressure of an inside of the cap negative, an acquiring unit configured to acquire information on an atmospheric pressure of an environment where the recording device is placed, and a control unit configured to perform a suction operation of sucking the ink from the discharge port surface by driving the pump when the valve is in the closed state, making the pressure of the inside of the cap negative, and then switching the valve to the open state and to control the suction operation based on the acquired information.