Fluid Ejection Device Pressure Adjustment Unit
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Solution Overview
Problem
Fluid ejection devices for medical purposes face inefficiencies due to the time required to increase pressure to the necessary level for fluid ejection, leading to idle waiting and inefficient operations.
Innovation Solution
A fluid ejection device with a pressure adjustment unit that increases the inner pressure of the fluid container beyond a predetermined level before allowing ejection, incorporating a connection channel, opening and closing unit, and ejection control to optimize fluid supply and prevent unexpected pressure issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is increased to the required level before fluid ejection, then fluid ejection can be performed, but the time required to increase pressure causes idle waiting and reduces operational efficiency
Solution Approach 1:
The system performs preliminary pressure increase in the fluid container before a ejection demand is made. The pressure adjustment unit increases pressure in advance, so when the ejection button is pressed, the fluid can be ejected immediately without waiting for pressure buildup. This resolves the contradiction by performing the pressure increase action before it is actually needed for ejection.
Solution Approach 2:
The system dynamically adjusts the connection between the fluid container and ejection unit based on operational state. The opening and closing unit switches between connecting the container to the ejection unit (for pressure increase) and disconnecting them (for ejection), optimizing the system response at different stages to eliminate idle waiting time.
2Productivity
If the connection channel is opened to supply fluid, then fluid ejection can occur, but pressure may be insufficient or unexpected pressure issues may arise
Solution Approach 1:
The pressure adjustment unit increases pressure in the fluid container in advance before the ejection operation. By the time the opening and closing unit connects the container to the ejection unit, the fluid is already at the required pressure, ensuring both immediate fluid supply and reliable pressure control during ejection.
Solution Approach 2:
The pressure adjustment unit includes a pressure detection mechanism that monitors the inner pressure of the fluid container. Based on the detected pressure, the control unit adjusts the pressure increase operation, ensuring the fluid reaches the precise required pressure before ejection, thereby maintaining both productivity and pressure control accuracy.
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
This solution reduces the time from demand to fluid ejection, ensures fluid is ejected at a predetermined pressure, and prevents fluid ejection at unexpected pressures by implementing a pressure adjustment mechanism and alarm system.
Implementation Method 1
The pressure adjustment unit adjusts the inner pressure of the fluid container to become higher than a predetermined pressure in a state where the pressure adjustment unit instructs the opening and closing unit to close the connection channel
Implementation Method 2
an opening and closing unit that opens and closes the connection channel; and a pressure adjustment unit that controls the opening and closing unit to open and close the connection channel
Implementation Method 3
a fluid ejection unit that ejects a fluid; an ejection control unit that controls the ejection of the fluid from the fluid ejection unit
Data Source
AI summary
A fluid ejection device includes a fluid ejection unit that ejects a fluid and an ejection control unit that controls the ejection of the fluid. A fluid container accommodates the fluid supplied to the fluid ejection unit. A connection channel connects the fluid ejection unit and the fluid container. An opening and closing unit opens and closes the connection channel. A pressure adjustment unit controls the opening and closing unit and adjusts an inner pressure of the fluid container. The pressure adjustment unit increases the inner pressure higher than a predetermined pressure by instructing the opening and closing unit to close the connection channel and then instructing the opening and closing unit to open the connection channel after the inner pressure of the fluid container exceeds the predetermined pressure. The ejection control unit allows the fluid ejection unit to eject the fluid after the connection channel is opened.