Peristaltic Pump Pressure Regulation for Inkjet Printing
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Solution Overview
Problem
Inkjet printing heads require continuous and precise sub-atmospheric pressure maintenance to prevent leakage, which leads to energy consumption and reduced pump life due to the constant operation of vacuum pumps.
Innovation Solution
A system comprising a peristaltic pump, pressure sensor, and controller that regulates pressure by connecting a chamber to a reference space, allowing the pump to adjust pressure to maintain a desired proximity to the sub-atmospheric pressure, reducing energy consumption and extending pump life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vacuum pump is continuously operated to maintain sub-atmospheric pressure in the material reservoir, then the desired vacuum level is maintained and leakage is prevented, but energy consumption increases and pump life is reduced
Solution Approach 1:
The vacuum pump operates periodically rather than continuously. The controller monitors the vacuum level and activates the pump only when the vacuum drops below the desired threshold, allowing the system to maintain reliable vacuum levels while significantly reducing energy consumption and pump wear
2Reliability
If a vacuum pump is continuously operated to maintain sub-atmospheric pressure, then leakage is prevented, but the effective life of the pump is reduced
Solution Approach 1:
By operating the vacuum pump periodically based on actual vacuum level needs rather than continuously, the system maintains reliable leakage prevention while extending the operational life of the pump through reduced runtime and wear
3Use of energy by moving object
If the vacuum pump operates only when needed, then energy consumption is reduced, but the vacuum level may fluctuate outside the desired range
Solution Approach 1:
The system employs a feedback control mechanism where a sensor continuously monitors the vacuum level and provides real-time information to the controller. The controller activates the vacuum pump when the vacuum drops below the desired threshold and deactivates it when the threshold is reached, maintaining precise vacuum levels while reducing energy consumption
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 system efficiently maintains the desired pressure difference, reducing energy consumption and extending the operational life of the vacuum pump while preventing leakage in inkjet printing heads.
Implementation Method 1
a peristaltic pump located along a duct that connects the chamber with the reference space
Data Source
AI summary
A system for maintaining a desired pressure difference between a first pressure within a chamber and a reference pressure at a reference space. The system may include a peristaltic pump located along a duct that connects the chamber with the reference space. The system may further include a pressure sensor for monitoring an actual pressure difference between the first pressure within the chamber and the reference pressure at the reference space. The system may also include a controller for receiving a signal from the pressure sensor for determining the actual pressure difference from the pressure sensor and for operating the peristaltic pump, in accordance with the actual pressure difference and the desired pressure difference, to increase, decrease or leave unchanged the pressure within the chamber so as to maintain the actual pressure difference within predetermined proximity to the desired pressure difference.