Variable-Threshold Valve Mechanism for Liquid Ejection Pressure Control
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Solution Overview
Problem
Existing liquid ejecting systems face complexity in pressure control due to the need to detect and respond to pressure changes in circulation systems, leading to complicated control mechanisms.
Innovation Solution
A valve mechanism with a communication liquid chamber and a pressure receiving body that converts pressure differences into operating forces, allowing for variable threshold pressures to control the opening and closing of valves, simplifying pressure control by eliminating the need for downstream pressure detection and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure detection and pump control are used to control circulation system pressure, then pressure control is achieved, but control mechanism complexity increases
Solution Approach 1:
The valve mechanism automatically responds to pressure changes in the communication liquid chamber by converting pressure differences into operating forces that open or close the valve, eliminating the need for external pressure detection and pump control systems
Solution Approach 2:
The communication liquid chamber acts as an intermediary that transmits pressure information from the circulation system to the valve, enabling the valve to sense and respond to pressure changes without requiring direct pressure sensors or complex control systems
2Ease of operation
If fixed threshold pressure is used for valve opening/closing, then control simplicity is maintained, but adaptability to different pressure conditions is reduced
Solution Approach 1:
The valve mechanism employs a variable threshold pressure that dynamically adjusts based on the operating conditions of the liquid ejecting head, allowing the system to adapt to different pressure requirements while maintaining simple automatic control through pressure difference conversion
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 simplifies pressure control in liquid ejecting systems by allowing for variable threshold pressures, reducing the complexity of control mechanisms and preventing pulsation in the pressurizing unit, while maintaining efficient liquid circulation and ejection.
Implementation Method 1
a pressure receiving body that converts a pressure difference between a pressure of the communication liquid chamber and a reference pressure into an operating force of the valve
Data Source
AI summary
A first valve mechanism is a valve mechanism provided in a flow path coupled to a liquid ejecting head that ejects a liquid, and including a valve that opens/closes the flow path, a first communication liquid chamber that communicates with the flow path, and a first pressure receiving body that converts a pressure difference between a pressure of the first communication liquid chamber and a reference pressure into an operating force of the valve, in which a threshold pressure of the first communication liquid chamber for determining opening/closing of the valve is variable.