Windbreak Cover for Pressure-Regulating Valve in Inkjet Heads
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Solution Overview
Problem
Conventional pressure-regulating valves for vacuum-feeding functional liquids to inkjet-type droplet ejection heads are unstable due to disruption by air currents, affecting the diaphragm's deformation and valve operation.
Innovation Solution
A pressure-regulating valve with a windbreak cover that blocks air currents, maintaining atmospheric pressure and stabilizing the pressure-receiving membrane's deformation, ensuring stable valve operation and liquid feeding to the droplet ejection head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a diaphragm is used as a pressure-receiving membrane in a conventional pressure-regulating valve, then the valve can operate based on atmospheric pressure, but the diaphragm is affected by air currents causing unstable valve operation
Solution Approach 1:
A windbreak cover is introduced as an intermediary component between the air current environment and the diaphragm. The windbreak cover blocks air currents from directly contacting the diaphragm, eliminating the harmful effect of air currents on valve operation while maintaining the atmospheric pressure-based operation mechanism
Solution Approach 2:
The windbreak cover is designed as a flexible protective enclosure that covers the diaphragm area. This thin film structure allows atmospheric pressure to act on the diaphragm while preventing air current disruption, thus stabilizing the pressure-receiving membrane's deformation and valve operation
2Reliability
If the pressure-receiving membrane is covered to block air currents, then valve operation stability improves, but the structure becomes more complex
Solution Approach 1:
The windbreak cover serves as a simple intermediary structure that adds minimal complexity to the valve system. It is designed as a straightforward protective enclosure that can be integrated into the existing valve housing without requiring complex mechanisms or additional active components
Solution Approach 2:
The windbreak cover utilizes a flexible thin film structure that provides effective air current blocking with minimal material and structural complexity. This approach maintains simplicity while achieving the reliability improvement through physical protection of the diaphragm
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 windbreak cover prevents disruption from ambient air currents, allowing the pressure-receiving membrane to operate stably and maintain normal deformation, ensuring precise and stable feeding of functional liquids to the droplet ejection head, enhancing drawing quality on workpieces.
Implementation Method 1
a windbreak cover is provided for allowing action of the pressure-receiving membrane and for covering the pressure-receiving membrane via space that is communicated with the atmosphere
Implementation Method 2
the pressure-receiving membrane is not affected by the ambient air current. The deformation or action of the pressure-receiving membrane can therefore be prevented from being disrupted by air currents
Data Source
AI summary
A pressure-regulating valve for opening and closing, based on atmospheric pressure, a valve body provided to a communication flow passage via which a primary chamber and a secondary chamber communicate inside a valve housing, with the aid of a pressure-receiving membrane that constitutes one surface of the secondary chamber, for regulating the pressure of a liquid fed to the primary chamber via an inflow port, and for feeding the liquid from the secondary chamber via an outflow port; the pressure-regulating valve wherein a cover is provided for allowing action of the pressure-receiving membrane and for covering the pressure-receiving membrane; and the cover has light-blocking properties.