Dual-Valve Fluid Discharge Control for Dynamic Pressure Adjustment
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Solution Overview
Problem
Existing fluid discharge devices, such as printers, lack the ability to dynamically adjust output pressure according to control states, limiting flexibility in fluid discharge operations.
Innovation Solution
A valve mechanism comprising an upstream chamber, downstream chamber, air chamber, flexible films, and biasing portions that allow for adjustable pressure control through movable opening and closing portions, enabling dynamic pressure adjustment in fluid discharge devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the output pressure is adjusted to a fixed set pressure, then the recording head can operate with appropriate negative pressure for ink droplet discharge, but the output pressure cannot be changed from the set pressure when dynamic pressure adjustment is needed
Solution Approach 1:
The valve mechanism transitions from a static pressure control system to a dynamic one by introducing movable opening and closing portions that can be positioned at multiple locations. This allows the valve to adjust its opening area dynamically, enabling continuous pressure adjustment from the fixed set pressure to higher pressures, thereby resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The invention changes the parameter of valve opening area by providing multiple positions for the opening and closing portions on both the upstream and downstream sides. By varying the combination of these positions, the effective opening area can be adjusted, which directly controls the output pressure, thus achieving dynamic pressure adjustment without fundamentally redesigning the valve structure
2Adaptability or versatility
If a fixed set pressure is used, then the system is simple to operate, but it lacks the ability to adapt to different control states requiring different pressure levels
Solution Approach 1:
The valve mechanism incorporates movable opening and closing portions that can be dynamically repositioned to different locations, allowing the system to adapt to various control states. This dynamic configurability enables pressure adjustment according to different operational requirements while maintaining a relatively simple operational interface
Solution Approach 2:
The valve mechanism is designed to perform multiple functions: it can maintain a fixed set pressure for normal operation and also adjust to higher pressures when needed. The same valve structure handles both pressure control modes by simply changing the position of the opening and closing portions, making the system universal and adaptable to different control states
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
Enables flexible and efficient pressure control in fluid discharge devices, allowing for precise fluid discharge and prevention of leakage, while maintaining optimal discharge conditions.
Implementation Method 1
a first flexible film that separates the downstream chamber and the air chamber from each other; a second flexible film that separates the upstream chamber and the downstream chamber from each other
Implementation Method 2
a biasing portion that biases the first flexible film in a direction in which a volume of the downstream chamber decreases
Data Source
AI summary
A fluid discharge device includes a first pressure adjustment valve provided in a first fluid channel and a second pressure adjustment valve provided in a second fluid channel. The first pressure adjustment valve is switchable between a first adjustment state in which a pressure downstream of the first pressure adjustment valve in the first fluid channel is adjusted to a first set pressure, and a first open state in which the pressure downstream of the first pressure adjustment valve is adjusted to a pressure higher than the first set pressure by maintaining the first fluid channel in an open state, and the second pressure adjustment valve is switchable between a second adjustment state in which a pressure upstream of the second pressure adjustment valve in the second fluid channel is adjusted to a second set pressure, and a second open state in which the pressure upstream of the second pressure adjustment valve is adjusted to a pressure lower than the second set pressure by maintaining the second fluid channel in an open state.